/**
 * @license
 * Video.js 7.0.0 <http://videojs.com/>
 * Copyright Brightcove, Inc. <https://www.brightcove.com/>
 * Available under Apache License Version 2.0
 * <https://github.com/videojs/video.js/blob/master/LICENSE>
 *
 * Includes vtt.js <https://github.com/mozilla/vtt.js>
 * Available under Apache License Version 2.0
 * <https://github.com/mozilla/vtt.js/blob/master/LICENSE>
 */

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
    typeof define === 'function' && define.amd ? define(factory) :
      (global.videojs = factory());
}(this, (function () {

  var version = "7.0.0";

  var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

  function createCommonjsModule(fn, module) {
    return module = {exports: {}}, fn(module, module.exports), module.exports;
  }

  var win;

  if (typeof window !== "undefined") {
    win = window;
  } else if (typeof commonjsGlobal !== "undefined") {
    win = commonjsGlobal;
  } else if (typeof self !== "undefined") {
    win = self;
  } else {
    win = {};
  }

  var window_1 = win;

  var empty = {};

  var empty$1 = /*#__PURE__*/Object.freeze({
    default: empty
  });

  var minDoc = (empty$1 && empty) || empty$1;

  var topLevel = typeof commonjsGlobal !== 'undefined' ? commonjsGlobal : typeof window !== 'undefined' ? window : {};

  var doccy;

  if (typeof document !== 'undefined') {
    doccy = document;
  } else {
    doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];

    if (!doccy) {
      doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;
    }
  }

  var document_1 = doccy;

  /**
   * @file log.js
   * @module log
   */

  var log = void 0;

  // This is the private tracking variable for logging level.
  var level = 'info';

  // This is the private tracking variable for the logging history.
  var history = [];

  /**
   * Log messages to the console and history based on the type of message
   *
   * @private
   * @param  {string} type
   *         The name of the console method to use.
   *
   * @param  {Array} args
   *         The arguments to be passed to the matching console method.
   */
  var logByType = function logByType(type, args) {
    var lvl = log.levels[level];
    var lvlRegExp = new RegExp('^(' + lvl + ')$');

    if (type !== 'log') {

      // Add the type to the front of the message when it's not "log".
      args.unshift(type.toUpperCase() + ':');
    }

    // Add a clone of the args at this point to history.
    if (history) {
      history.push([].concat(args));
    }

    // Add console prefix after adding to history.
    args.unshift('VIDEOJS:');

    // If there's no console then don't try to output messages, but they will
    // still be stored in history.
    if (!window_1.console) {
      return;
    }

    // Was setting these once outside of this function, but containing them
    // in the function makes it easier to test cases where console doesn't exist
    // when the module is executed.
    var fn = window_1.console[type];

    if (!fn && type === 'debug') {
      // Certain browsers don't have support for console.debug. For those, we
      // should default to the closest comparable log.
      fn = window_1.console.info || window_1.console.log;
    }

    // Bail out if there's no console or if this type is not allowed by the
    // current logging level.
    if (!fn || !lvl || !lvlRegExp.test(type)) {
      return;
    }

    fn[Array.isArray(args) ? 'apply' : 'call'](window_1.console, args);
  };

  /**
   * Logs plain debug messages. Similar to `console.log`.
   *
   * @class
   * @param    {Mixed[]} args
   *           One or more messages or objects that should be logged.
   */
  log = function log() {
    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    logByType('log', args);
  };

  /**
   * Enumeration of available logging levels, where the keys are the level names
   * and the values are `|`-separated strings containing logging methods allowed
   * in that logging level. These strings are used to create a regular expression
   * matching the function name being called.
   *
   * Levels provided by video.js are:
   *
   * - `off`: Matches no calls. Any value that can be cast to `false` will have
   *   this effect. The most restrictive.
   * - `all`: Matches only Video.js-provided functions (`debug`, `log`,
   *   `log.warn`, and `log.error`).
   * - `debug`: Matches `log.debug`, `log`, `log.warn`, and `log.error` calls.
   * - `info` (default): Matches `log`, `log.warn`, and `log.error` calls.
   * - `warn`: Matches `log.warn` and `log.error` calls.
   * - `error`: Matches only `log.error` calls.
   *
   * @type {Object}
   */
  log.levels = {
    all: 'debug|log|warn|error',
    off: '',
    debug: 'debug|log|warn|error',
    info: 'log|warn|error',
    warn: 'warn|error',
    error: 'error',
    DEFAULT: level
  };

  /**
   * Get or set the current logging level. If a string matching a key from
   * {@link log.levels} is provided, acts as a setter. Regardless of argument,
   * returns the current logging level.
   *
   * @param  {string} [lvl]
   *         Pass to set a new logging level.
   *
   * @return {string}
   *         The current logging level.
   */
  log.level = function (lvl) {
    if (typeof lvl === 'string') {
      if (!log.levels.hasOwnProperty(lvl)) {
        throw new Error('"' + lvl + '" in not a valid log level');
      }
      level = lvl;
    }
    return level;
  };

  /**
   * Returns an array containing everything that has been logged to the history.
   *
   * This array is a shallow clone of the internal history record. However, its
   * contents are _not_ cloned; so, mutating objects inside this array will
   * mutate them in history.
   *
   * @return {Array}
   */
  log.history = function () {
    return history ? [].concat(history) : [];
  };

  /**
   * Clears the internal history tracking, but does not prevent further history
   * tracking.
   */
  log.history.clear = function () {
    if (history) {
      history.length = 0;
    }
  };

  /**
   * Disable history tracking if it is currently enabled.
   */
  log.history.disable = function () {
    if (history !== null) {
      history.length = 0;
      history = null;
    }
  };

  /**
   * Enable history tracking if it is currently disabled.
   */
  log.history.enable = function () {
    if (history === null) {
      history = [];
    }
  };

  /**
   * Logs error messages. Similar to `console.error`.
   *
   * @param {Mixed[]} args
   *        One or more messages or objects that should be logged as an error
   */
  log.error = function () {
    for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
      args[_key2] = arguments[_key2];
    }

    return logByType('error', args);
  };

  /**
   * Logs warning messages. Similar to `console.warn`.
   *
   * @param {Mixed[]} args
   *        One or more messages or objects that should be logged as a warning.
   */
  log.warn = function () {
    for (var _len3 = arguments.length, args = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
      args[_key3] = arguments[_key3];
    }

    return logByType('warn', args);
  };

  /**
   * Logs debug messages. Similar to `console.debug`, but may also act as a comparable
   * log if `console.debug` is not available
   *
   * @param {Mixed[]} args
   *        One or more messages or objects that should be logged as debug.
   */
  log.debug = function () {
    for (var _len4 = arguments.length, args = Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
      args[_key4] = arguments[_key4];
    }

    return logByType('debug', args);
  };

  var log$1 = log;

  function clean(s) {
    return s.replace(/\n\r?\s*/g, '');
  }

  var tsml = function tsml(sa) {
    var s = '',
      i = 0;

    for (; i < arguments.length; i++) {
      s += clean(sa[i]) + (arguments[i + 1] || '');
    }
    return s;
  };

  var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
    return typeof obj;
  } : function (obj) {
    return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
  };

  var classCallCheck = function (instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  };

  var inherits = function (subClass, superClass) {
    if (typeof superClass !== "function" && superClass !== null) {
      throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
    }

    subClass.prototype = Object.create(superClass && superClass.prototype, {
      constructor: {
        value: subClass,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
    if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
  };

  var possibleConstructorReturn = function (self, call) {
    if (!self) {
      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
    }

    return call && (typeof call === "object" || typeof call === "function") ? call : self;
  };

  var taggedTemplateLiteralLoose = function (strings, raw) {
    strings.raw = raw;
    return strings;
  };

  /**
   * @file obj.js
   * @module obj
   */

  /**
   * @callback obj:EachCallback
   *
   * @param {Mixed} value
   *        The current key for the object that is being iterated over.
   *
   * @param {string} key
   *        The current key-value for object that is being iterated over
   */

  /**
   * @callback obj:ReduceCallback
   *
   * @param {Mixed} accum
   *        The value that is accumulating over the reduce loop.
   *
   * @param {Mixed} value
   *        The current key for the object that is being iterated over.
   *
   * @param {string} key
   *        The current key-value for object that is being iterated over
   *
   * @return {Mixed}
   *         The new accumulated value.
   */
  var toString = Object.prototype.toString;

  /**
   * Get the keys of an Object
   *
   * @param {Object}
   *        The Object to get the keys from
   *
   * @return {string[]}
   *         An array of the keys from the object. Returns an empty array if the
   *         object passed in was invalid or had no keys.
   *
   * @private
   */
  var keys = function keys(object) {
    return isObject(object) ? Object.keys(object) : [];
  };

  /**
   * Array-like iteration for objects.
   *
   * @param {Object} object
   *        The object to iterate over
   *
   * @param {obj:EachCallback} fn
   *        The callback function which is called for each key in the object.
   */
  function each(object, fn) {
    keys(object).forEach(function (key) {
      return fn(object[key], key);
    });
  }

  /**
   * Array-like reduce for objects.
   *
   * @param {Object} object
   *        The Object that you want to reduce.
   *
   * @param {Function} fn
   *         A callback function which is called for each key in the object. It
   *         receives the accumulated value and the per-iteration value and key
   *         as arguments.
   *
   * @param {Mixed} [initial = 0]
   *        Starting value
   *
   * @return {Mixed}
   *         The final accumulated value.
   */
  function reduce(object, fn) {
    var initial = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;

    return keys(object).reduce(function (accum, key) {
      return fn(accum, object[key], key);
    }, initial);
  }

  /**
   * Object.assign-style object shallow merge/extend.
   *
   * @param  {Object} target
   * @param  {Object} ...sources
   * @return {Object}
   */
  function assign(target) {
    for (var _len = arguments.length, sources = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      sources[_key - 1] = arguments[_key];
    }

    if (Object.assign) {
      return Object.assign.apply(Object, [target].concat(sources));
    }

    sources.forEach(function (source) {
      if (!source) {
        return;
      }

      each(source, function (value, key) {
        target[key] = value;
      });
    });

    return target;
  }

  /**
   * Returns whether a value is an object of any kind - including DOM nodes,
   * arrays, regular expressions, etc. Not functions, though.
   *
   * This avoids the gotcha where using `typeof` on a `null` value
   * results in `'object'`.
   *
   * @param  {Object} value
   * @return {Boolean}
   */
  function isObject(value) {
    return !!value && (typeof value === 'undefined' ? 'undefined' : _typeof(value)) === 'object';
  }

  /**
   * Returns whether an object appears to be a "plain" object - that is, a
   * direct instance of `Object`.
   *
   * @param  {Object} value
   * @return {Boolean}
   */
  function isPlain(value) {
    return isObject(value) && toString.call(value) === '[object Object]' && value.constructor === Object;
  }

  /**
   * @file computed-style.js
   * @module computed-style
   */

  /**
   * A safe getComputedStyle.
   *
   * This is needed because in Firefox, if the player is loaded in an iframe with
   * `display:none`, then `getComputedStyle` returns `null`, so, we do a null-check to
   * make sure  that the player doesn't break in these cases.
   *
   * @param {Element} el
   *        The element you want the computed style of
   *
   * @param {string} prop
   *        The property name you want
   *
   * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397
   *
   * @static
   * @const
   */
  function computedStyle(el, prop) {
    if (!el || !prop) {
      return '';
    }

    if (typeof window_1.getComputedStyle === 'function') {
      var cs = window_1.getComputedStyle(el);

      return cs ? cs[prop] : '';
    }

    return '';
  }

  var _templateObject = taggedTemplateLiteralLoose(['Setting attributes in the second argument of createEl()\n                has been deprecated. Use the third argument instead.\n                createEl(type, properties, attributes). Attempting to set ', ' to ', '.'], ['Setting attributes in the second argument of createEl()\n                has been deprecated. Use the third argument instead.\n                createEl(type, properties, attributes). Attempting to set ', ' to ', '.']);

  /**
   * Detect if a value is a string with any non-whitespace characters.
   *
   * @param {string} str
   *        The string to check
   *
   * @return {boolean}
   *         - True if the string is non-blank
   *         - False otherwise
   *
   */
  function isNonBlankString(str) {
    return typeof str === 'string' && /\S/.test(str);
  }

  /**
   * Throws an error if the passed string has whitespace. This is used by
   * class methods to be relatively consistent with the classList API.
   *
   * @param {string} str
   *         The string to check for whitespace.
   *
   * @throws {Error}
   *         Throws an error if there is whitespace in the string.
   *
   */
  function throwIfWhitespace(str) {
    if (/\s/.test(str)) {
      throw new Error('class has illegal whitespace characters');
    }
  }

  /**
   * Produce a regular expression for matching a className within an elements className.
   *
   * @param {string} className
   *         The className to generate the RegExp for.
   *
   * @return {RegExp}
   *         The RegExp that will check for a specific `className` in an elements
   *         className.
   */
  function classRegExp(className) {
    return new RegExp('(^|\\s)' + className + '($|\\s)');
  }

  /**
   * Whether the current DOM interface appears to be real.
   *
   * @return {Boolean}
   */
  function isReal() {
    // Both document and window will never be undefined thanks to `global`.
    return document_1 === window_1.document;
  }

  /**
   * Determines, via duck typing, whether or not a value is a DOM element.
   *
   * @param {Mixed} value
   *        The thing to check
   *
   * @return {boolean}
   *         - True if it is a DOM element
   *         - False otherwise
   */
  function isEl(value) {
    return isObject(value) && value.nodeType === 1;
  }

  /**
   * Determines if the current DOM is embedded in an iframe.
   *
   * @return {boolean}
   *
   */
  function isInFrame() {

    // We need a try/catch here because Safari will throw errors when attempting
    // to get either `parent` or `self`
    try {
      return window_1.parent !== window_1.self;
    } catch (x) {
      return true;
    }
  }

  /**
   * Creates functions to query the DOM using a given method.
   *
   * @param {string} method
   *         The method to create the query with.
   *
   * @return {Function}
   *         The query method
   */
  function createQuerier(method) {
    return function (selector, context) {
      if (!isNonBlankString(selector)) {
        return document_1[method](null);
      }
      if (isNonBlankString(context)) {
        context = document_1.querySelector(context);
      }

      var ctx = isEl(context) ? context : document_1;

      return ctx[method] && ctx[method](selector);
    };
  }

  /**
   * Creates an element and applies properties.
   *
   * @param {string} [tagName='div']
   *         Name of tag to be created.
   *
   * @param {Object} [properties={}]
   *         Element properties to be applied.
   *
   * @param {Object} [attributes={}]
   *         Element attributes to be applied.
   *
   * @param {String|Element|TextNode|Array|Function} [content]
   *         Contents for the element (see: {@link dom:normalizeContent})
   *
   * @return {Element}
   *         The element that was created.
   */
  function createEl() {
    var tagName = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'div';
    var properties = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
    var content = arguments[3];

    var el = document_1.createElement(tagName);

    Object.getOwnPropertyNames(properties).forEach(function (propName) {
      var val = properties[propName];

      // See #2176
      // We originally were accepting both properties and attributes in the
      // same object, but that doesn't work so well.
      if (propName.indexOf('aria-') !== -1 || propName === 'role' || propName === 'type') {
        log$1.warn(tsml(_templateObject, propName, val));
        el.setAttribute(propName, val);

        // Handle textContent since it's not supported everywhere and we have a
        // method for it.
      } else if (propName === 'textContent') {
        textContent(el, val);
      } else {
        el[propName] = val;
      }
    });

    Object.getOwnPropertyNames(attributes).forEach(function (attrName) {
      el.setAttribute(attrName, attributes[attrName]);
    });

    if (content) {
      appendContent(el, content);
    }

    return el;
  }

  /**
   * Injects text into an element, replacing any existing contents entirely.
   *
   * @param {Element} el
   *        The element to add text content into
   *
   * @param {string} text
   *        The text content to add.
   *
   * @return {Element}
   *         The element with added text content.
   */
  function textContent(el, text) {
    if (typeof el.textContent === 'undefined') {
      el.innerText = text;
    } else {
      el.textContent = text;
    }
    return el;
  }

  /**
   * Insert an element as the first child node of another
   *
   * @param {Element} child
   *        Element to insert
   *
   * @param {Element} parent
   *        Element to insert child into
   */
  function prependTo(child, parent) {
    if (parent.firstChild) {
      parent.insertBefore(child, parent.firstChild);
    } else {
      parent.appendChild(child);
    }
  }

  /**
   * Check if an element has a CSS class
   *
   * @param {Element} element
   *        Element to check
   *
   * @param {string} classToCheck
   *        Class name to check for
   *
   * @return {boolean}
   *         - True if the element had the class
   *         - False otherwise.
   *
   * @throws {Error}
   *         Throws an error if `classToCheck` has white space.
   */
  function hasClass(element, classToCheck) {
    throwIfWhitespace(classToCheck);
    if (element.classList) {
      return element.classList.contains(classToCheck);
    }
    return classRegExp(classToCheck).test(element.className);
  }

  /**
   * Add a CSS class name to an element
   *
   * @param {Element} element
   *        Element to add class name to.
   *
   * @param {string} classToAdd
   *        Class name to add.
   *
   * @return {Element}
   *         The dom element with the added class name.
   */
  function addClass(element, classToAdd) {
    if (element.classList) {
      element.classList.add(classToAdd);

      // Don't need to `throwIfWhitespace` here because `hasElClass` will do it
      // in the case of classList not being supported.
    } else if (!hasClass(element, classToAdd)) {
      element.className = (element.className + ' ' + classToAdd).trim();
    }

    return element;
  }

  /**
   * Remove a CSS class name from an element
   *
   * @param {Element} element
   *        Element to remove a class name from.
   *
   * @param {string} classToRemove
   *        Class name to remove
   *
   * @return {Element}
   *         The dom element with class name removed.
   */
  function removeClass(element, classToRemove) {
    if (element.classList) {
      element.classList.remove(classToRemove);
    } else {
      throwIfWhitespace(classToRemove);
      element.className = element.className.split(/\s+/).filter(function (c) {
        return c !== classToRemove;
      }).join(' ');
    }

    return element;
  }

  /**
   * The callback definition for toggleElClass.
   *
   * @callback Dom~PredicateCallback
   * @param {Element} element
   *        The DOM element of the Component.
   *
   * @param {string} classToToggle
   *        The `className` that wants to be toggled
   *
   * @return {boolean|undefined}
   *         - If true the `classToToggle` will get added to `element`.
   *         - If false the `classToToggle` will get removed from `element`.
   *         - If undefined this callback will be ignored
   */

  /**
   * Adds or removes a CSS class name on an element depending on an optional
   * condition or the presence/absence of the class name.
   *
   * @param {Element} element
   *        The element to toggle a class name on.
   *
   * @param {string} classToToggle
   *        The class that should be toggled
   *
   * @param {boolean|PredicateCallback} [predicate]
   *        See the return value for {@link Dom~PredicateCallback}
   *
   * @return {Element}
   *         The element with a class that has been toggled.
   */
  function toggleClass(element, classToToggle, predicate) {

    // This CANNOT use `classList` internally because IE11 does not support the
    // second parameter to the `classList.toggle()` method! Which is fine because
    // `classList` will be used by the add/remove functions.
    var has = hasClass(element, classToToggle);

    if (typeof predicate === 'function') {
      predicate = predicate(element, classToToggle);
    }

    if (typeof predicate !== 'boolean') {
      predicate = !has;
    }

    // If the necessary class operation matches the current state of the
    // element, no action is required.
    if (predicate === has) {
      return;
    }

    if (predicate) {
      addClass(element, classToToggle);
    } else {
      removeClass(element, classToToggle);
    }

    return element;
  }

  /**
   * Apply attributes to an HTML element.
   *
   * @param {Element} el
   *        Element to add attributes to.
   *
   * @param {Object} [attributes]
   *        Attributes to be applied.
   */
  function setAttributes(el, attributes) {
    Object.getOwnPropertyNames(attributes).forEach(function (attrName) {
      var attrValue = attributes[attrName];

      if (attrValue === null || typeof attrValue === 'undefined' || attrValue === false) {
        el.removeAttribute(attrName);
      } else {
        el.setAttribute(attrName, attrValue === true ? '' : attrValue);
      }
    });
  }

  /**
   * Get an element's attribute values, as defined on the HTML tag
   * Attributes are not the same as properties. They're defined on the tag
   * or with setAttribute (which shouldn't be used with HTML)
   * This will return true or false for boolean attributes.
   *
   * @param {Element} tag
   *        Element from which to get tag attributes.
   *
   * @return {Object}
   *         All attributes of the element.
   */
  function getAttributes(tag) {
    var obj = {};

    // known boolean attributes
    // we can check for matching boolean properties, but not all browsers
    // and not all tags know about these attributes, so, we still want to check them manually
    var knownBooleans = ',' + 'autoplay,controls,playsinline,loop,muted,default,defaultMuted' + ',';

    if (tag && tag.attributes && tag.attributes.length > 0) {
      var attrs = tag.attributes;

      for (var i = attrs.length - 1; i >= 0; i--) {
        var attrName = attrs[i].name;
        var attrVal = attrs[i].value;

        // check for known booleans
        // the matching element property will return a value for typeof
        if (typeof tag[attrName] === 'boolean' || knownBooleans.indexOf(',' + attrName + ',') !== -1) {
          // the value of an included boolean attribute is typically an empty
          // string ('') which would equal false if we just check for a false value.
          // we also don't want support bad code like autoplay='false'
          attrVal = attrVal !== null ? true : false;
        }

        obj[attrName] = attrVal;
      }
    }

    return obj;
  }

  /**
   * Get the value of an element's attribute
   *
   * @param {Element} el
   *        A DOM element
   *
   * @param {string} attribute
   *        Attribute to get the value of
   *
   * @return {string}
   *         value of the attribute
   */
  function getAttribute(el, attribute) {
    return el.getAttribute(attribute);
  }

  /**
   * Set the value of an element's attribute
   *
   * @param {Element} el
   *        A DOM element
   *
   * @param {string} attribute
   *        Attribute to set
   *
   * @param {string} value
   *        Value to set the attribute to
   */
  function setAttribute(el, attribute, value) {
    el.setAttribute(attribute, value);
  }

  /**
   * Remove an element's attribute
   *
   * @param {Element} el
   *        A DOM element
   *
   * @param {string} attribute
   *        Attribute to remove
   */
  function removeAttribute(el, attribute) {
    el.removeAttribute(attribute);
  }

  /**
   * Attempt to block the ability to select text while dragging controls
   */
  function blockTextSelection() {
    document_1.body.focus();
    document_1.onselectstart = function () {
      return false;
    };
  }

  /**
   * Turn off text selection blocking
   */
  function unblockTextSelection() {
    document_1.onselectstart = function () {
      return true;
    };
  }

  /**
   * Identical to the native `getBoundingClientRect` function, but ensures that
   * the method is supported at all (it is in all browsers we claim to support)
   * and that the element is in the DOM before continuing.
   *
   * This wrapper function also shims properties which are not provided by some
   * older browsers (namely, IE8).
   *
   * Additionally, some browsers do not support adding properties to a
   * `ClientRect`/`DOMRect` object; so, we shallow-copy it with the standard
   * properties (except `x` and `y` which are not widely supported). This helps
   * avoid implementations where keys are non-enumerable.
   *
   * @param  {Element} el
   *         Element whose `ClientRect` we want to calculate.
   *
   * @return {Object|undefined}
   *         Always returns a plain
   */
  function getBoundingClientRect(el) {
    if (el && el.getBoundingClientRect && el.parentNode) {
      var rect = el.getBoundingClientRect();
      var result = {};

      ['bottom', 'height', 'left', 'right', 'top', 'width'].forEach(function (k) {
        if (rect[k] !== undefined) {
          result[k] = rect[k];
        }
      });

      if (!result.height) {
        result.height = parseFloat(computedStyle(el, 'height'));
      }

      if (!result.width) {
        result.width = parseFloat(computedStyle(el, 'width'));
      }

      return result;
    }
  }

  /**
   * The postion of a DOM element on the page.
   *
   * @typedef {Object} module:dom~Position
   *
   * @property {number} left
   *           Pixels to the left
   *
   * @property {number} top
   *           Pixels on top
   */

  /**
   * Offset Left.
   * getBoundingClientRect technique from
   * John Resig
   *
   * @see http://ejohn.org/blog/getboundingclientrect-is-awesome/
   *
   * @param {Element} el
   *        Element from which to get offset
   *
   * @return {module:dom~Position}
   *         The position of the element that was passed in.
   */
  function findPosition(el) {
    var box = void 0;

    if (el.getBoundingClientRect && el.parentNode) {
      box = el.getBoundingClientRect();
    }

    if (!box) {
      return {
        left: 0,
        top: 0
      };
    }

    var docEl = document_1.documentElement;
    var body = document_1.body;

    var clientLeft = docEl.clientLeft || body.clientLeft || 0;
    var scrollLeft = window_1.pageXOffset || body.scrollLeft;
    var left = box.left + scrollLeft - clientLeft;

    var clientTop = docEl.clientTop || body.clientTop || 0;
    var scrollTop = window_1.pageYOffset || body.scrollTop;
    var top = box.top + scrollTop - clientTop;

    // Android sometimes returns slightly off decimal values, so need to round
    return {
      left: Math.round(left),
      top: Math.round(top)
    };
  }

  /**
   * x and y coordinates for a dom element or mouse pointer
   *
   * @typedef {Object} Dom~Coordinates
   *
   * @property {number} x
   *           x coordinate in pixels
   *
   * @property {number} y
   *           y coordinate in pixels
   */

  /**
   * Get pointer position in element
   * Returns an object with x and y coordinates.
   * The base on the coordinates are the bottom left of the element.
   *
   * @param {Element} el
   *        Element on which to get the pointer position on
   *
   * @param {EventTarget~Event} event
   *        Event object
   *
   * @return {Dom~Coordinates}
   *         A Coordinates object corresponding to the mouse position.
   *
   */
  function getPointerPosition(el, event) {
    var position = {};
    var box = findPosition(el);
    var boxW = el.offsetWidth;
    var boxH = el.offsetHeight;

    var boxY = box.top;
    var boxX = box.left;
    var pageY = event.pageY;
    var pageX = event.pageX;

    if (event.changedTouches) {
      pageX = event.changedTouches[0].pageX;
      pageY = event.changedTouches[0].pageY;
    }

    position.y = Math.max(0, Math.min(1, (boxY - pageY + boxH) / boxH));
    position.x = Math.max(0, Math.min(1, (pageX - boxX) / boxW));

    return position;
  }

  /**
   * Determines, via duck typing, whether or not a value is a text node.
   *
   * @param {Mixed} value
   *        Check if this value is a text node.
   *
   * @return {boolean}
   *         - True if it is a text node
   *         - False otherwise
   */
  function isTextNode(value) {
    return isObject(value) && value.nodeType === 3;
  }

  /**
   * Empties the contents of an element.
   *
   * @param {Element} el
   *        The element to empty children from
   *
   * @return {Element}
   *         The element with no children
   */
  function emptyEl(el) {
    while (el.firstChild) {
      el.removeChild(el.firstChild);
    }
    return el;
  }

  /**
   * Normalizes content for eventual insertion into the DOM.
   *
   * This allows a wide range of content definition methods, but protects
   * from falling into the trap of simply writing to `innerHTML`, which is
   * an XSS concern.
   *
   * The content for an element can be passed in multiple types and
   * combinations, whose behavior is as follows:
   *
   * @param {String|Element|TextNode|Array|Function} content
   *        - String: Normalized into a text node.
   *        - Element/TextNode: Passed through.
   *        - Array: A one-dimensional array of strings, elements, nodes, or functions
   *          (which return single strings, elements, or nodes).
   *        - Function: If the sole argument, is expected to produce a string, element,
   *          node, or array as defined above.
   *
   * @return {Array}
   *         All of the content that was passed in normalized.
   */
  function normalizeContent(content) {

    // First, invoke content if it is a function. If it produces an array,
    // that needs to happen before normalization.
    if (typeof content === 'function') {
      content = content();
    }

    // Next up, normalize to an array, so one or many items can be normalized,
    // filtered, and returned.
    return (Array.isArray(content) ? content : [content]).map(function (value) {

      // First, invoke value if it is a function to produce a new value,
      // which will be subsequently normalized to a Node of some kind.
      if (typeof value === 'function') {
        value = value();
      }

      if (isEl(value) || isTextNode(value)) {
        return value;
      }

      if (typeof value === 'string' && /\S/.test(value)) {
        return document_1.createTextNode(value);
      }
    }).filter(function (value) {
      return value;
    });
  }

  /**
   * Normalizes and appends content to an element.
   *
   * @param {Element} el
   *        Element to append normalized content to.
   *
   *
   * @param {String|Element|TextNode|Array|Function} content
   *        See the `content` argument of {@link dom:normalizeContent}
   *
   * @return {Element}
   *         The element with appended normalized content.
   */
  function appendContent(el, content) {
    normalizeContent(content).forEach(function (node) {
      return el.appendChild(node);
    });
    return el;
  }

  /**
   * Normalizes and inserts content into an element; this is identical to
   * `appendContent()`, except it empties the element first.
   *
   * @param {Element} el
   *        Element to insert normalized content into.
   *
   * @param {String|Element|TextNode|Array|Function} content
   *        See the `content` argument of {@link dom:normalizeContent}
   *
   * @return {Element}
   *         The element with inserted normalized content.
   *
   */
  function insertContent(el, content) {
    return appendContent(emptyEl(el), content);
  }

  /**
   * Check if event was a single left click
   *
   * @param {EventTarget~Event} event
   *        Event object
   *
   * @return {boolean}
   *         - True if a left click
   *         - False if not a left click
   */
  function isSingleLeftClick(event) {
    // Note: if you create something draggable, be sure to
    // call it on both `mousedown` and `mousemove` event,
    // otherwise `mousedown` should be enough for a button

    if (event.button === undefined && event.buttons === undefined) {
      // Why do we need `buttons` ?
      // Because, middle mouse sometimes have this:
      // e.button === 0 and e.buttons === 4
      // Furthermore, we want to prevent combination click, something like
      // HOLD middlemouse then left click, that would be
      // e.button === 0, e.buttons === 5
      // just `button` is not gonna work

      // Alright, then what this block does ?
      // this is for chrome `simulate mobile devices`
      // I want to support this as well

      return true;
    }

    if (event.button === 0 && event.buttons === undefined) {
      // Touch screen, sometimes on some specific device, `buttons`
      // doesn't have anything (safari on ios, blackberry...)

      return true;
    }

    if (event.button !== 0 || event.buttons !== 1) {
      // This is the reason we have those if else block above
      // if any special case we can catch and let it slide
      // we do it above, when get to here, this definitely
      // is-not-left-click

      return false;
    }

    return true;
  }

  /**
   * Finds a single DOM element matching `selector` within the optional
   * `context` of another DOM element (defaulting to `document`).
   *
   * @param {string} selector
   *        A valid CSS selector, which will be passed to `querySelector`.
   *
   * @param {Element|String} [context=document]
   *        A DOM element within which to query. Can also be a selector
   *        string in which case the first matching element will be used
   *        as context. If missing (or no element matches selector), falls
   *        back to `document`.
   *
   * @return {Element|null}
   *         The element that was found or null.
   */
  var $ = createQuerier('querySelector');

  /**
   * Finds a all DOM elements matching `selector` within the optional
   * `context` of another DOM element (defaulting to `document`).
   *
   * @param {string} selector
   *           A valid CSS selector, which will be passed to `querySelectorAll`.
   *
   * @param {Element|String} [context=document]
   *           A DOM element within which to query. Can also be a selector
   *           string in which case the first matching element will be used
   *           as context. If missing (or no element matches selector), falls
   *           back to `document`.
   *
   * @return {NodeList}
   *         A element list of elements that were found. Will be empty if none were found.
   *
   */
  var $$ = createQuerier('querySelectorAll');

  var Dom = /*#__PURE__*/Object.freeze({
    isReal: isReal,
    isEl: isEl,
    isInFrame: isInFrame,
    createEl: createEl,
    textContent: textContent,
    prependTo: prependTo,
    hasClass: hasClass,
    addClass: addClass,
    removeClass: removeClass,
    toggleClass: toggleClass,
    setAttributes: setAttributes,
    getAttributes: getAttributes,
    getAttribute: getAttribute,
    setAttribute: setAttribute,
    removeAttribute: removeAttribute,
    blockTextSelection: blockTextSelection,
    unblockTextSelection: unblockTextSelection,
    getBoundingClientRect: getBoundingClientRect,
    findPosition: findPosition,
    getPointerPosition: getPointerPosition,
    isTextNode: isTextNode,
    emptyEl: emptyEl,
    normalizeContent: normalizeContent,
    appendContent: appendContent,
    insertContent: insertContent,
    isSingleLeftClick: isSingleLeftClick,
    $: $,
    $$: $$
  });

  /**
   * @file guid.js
   * @module guid
   */

  /**
   * Unique ID for an element or function
   * @type {Number}
   */
  var _guid = 1;

  /**
   * Get a unique auto-incrementing ID by number that has not been returned before.
   *
   * @return {number}
   *         A new unique ID.
   */
  function newGUID() {
    return _guid++;
  }

  /**
   * @file dom-data.js
   * @module dom-data
   */

  /**
   * Element Data Store.
   *
   * Allows for binding data to an element without putting it directly on the
   * element. Ex. Event listeners are stored here.
   * (also from jsninja.com, slightly modified and updated for closure compiler)
   *
   * @type {Object}
   * @private
   */
  var elData = {};

  /*
   * Unique attribute name to store an element's guid in
   *
   * @type {String}
   * @constant
   * @private
   */
  var elIdAttr = 'vdata' + new Date().getTime();

  /**
   * Returns the cache object where data for an element is stored
   *
   * @param {Element} el
   *        Element to store data for.
   *
   * @return {Object}
   *         The cache object for that el that was passed in.
   */
  function getData(el) {
    var id = el[elIdAttr];

    if (!id) {
      id = el[elIdAttr] = newGUID();
    }

    if (!elData[id]) {
      elData[id] = {};
    }

    return elData[id];
  }

  /**
   * Returns whether or not an element has cached data
   *
   * @param {Element} el
   *        Check if this element has cached data.
   *
   * @return {boolean}
   *         - True if the DOM element has cached data.
   *         - False otherwise.
   */
  function hasData(el) {
    var id = el[elIdAttr];

    if (!id) {
      return false;
    }

    return !!Object.getOwnPropertyNames(elData[id]).length;
  }

  /**
   * Delete data for the element from the cache and the guid attr from getElementById
   *
   * @param {Element} el
   *        Remove cached data for this element.
   */
  function removeData(el) {
    var id = el[elIdAttr];

    if (!id) {
      return;
    }

    // Remove all stored data
    delete elData[id];

    // Remove the elIdAttr property from the DOM node
    try {
      delete el[elIdAttr];
    } catch (e) {
      if (el.removeAttribute) {
        el.removeAttribute(elIdAttr);
      } else {
        // IE doesn't appear to support removeAttribute on the document element
        el[elIdAttr] = null;
      }
    }
  }

  /**
   * @file events.js. An Event System (John Resig - Secrets of a JS Ninja http://jsninja.com/)
   * (Original book version wasn't completely usable, so fixed some things and made Closure Compiler compatible)
   * This should work very similarly to jQuery's events, however it's based off the book version which isn't as
   * robust as jquery's, so there's probably some differences.
   *
   * @module events
   */

  /**
   * Clean up the listener cache and dispatchers
   *
   * @param {Element|Object} elem
   *        Element to clean up
   *
   * @param {string} type
   *        Type of event to clean up
   */
  function _cleanUpEvents(elem, type) {
    var data = getData(elem);

    // Remove the events of a particular type if there are none left
    if (data.handlers[type].length === 0) {
      delete data.handlers[type];
      // data.handlers[type] = null;
      // Setting to null was causing an error with data.handlers

      // Remove the meta-handler from the element
      if (elem.removeEventListener) {
        elem.removeEventListener(type, data.dispatcher, false);
      } else if (elem.detachEvent) {
        elem.detachEvent('on' + type, data.dispatcher);
      }
    }

    // Remove the events object if there are no types left
    if (Object.getOwnPropertyNames(data.handlers).length <= 0) {
      delete data.handlers;
      delete data.dispatcher;
      delete data.disabled;
    }

    // Finally remove the element data if there is no data left
    if (Object.getOwnPropertyNames(data).length === 0) {
      removeData(elem);
    }
  }

  /**
   * Loops through an array of event types and calls the requested method for each type.
   *
   * @param {Function} fn
   *        The event method we want to use.
   *
   * @param {Element|Object} elem
   *        Element or object to bind listeners to
   *
   * @param {string} type
   *        Type of event to bind to.
   *
   * @param {EventTarget~EventListener} callback
   *        Event listener.
   */
  function _handleMultipleEvents(fn, elem, types, callback) {
    types.forEach(function (type) {
      // Call the event method for each one of the types
      fn(elem, type, callback);
    });
  }

  /**
   * Fix a native event to have standard property values
   *
   * @param {Object} event
   *        Event object to fix.
   *
   * @return {Object}
   *         Fixed event object.
   */
  function fixEvent(event) {

    function returnTrue() {
      return true;
    }

    function returnFalse() {
      return false;
    }

    // Test if fixing up is needed
    // Used to check if !event.stopPropagation instead of isPropagationStopped
    // But native events return true for stopPropagation, but don't have
    // other expected methods like isPropagationStopped. Seems to be a problem
    // with the Javascript Ninja code. So we're just overriding all events now.
    if (!event || !event.isPropagationStopped) {
      var old = event || window_1.event;

      event = {};
      // Clone the old object so that we can modify the values event = {};
      // IE8 Doesn't like when you mess with native event properties
      // Firefox returns false for event.hasOwnProperty('type') and other props
      //  which makes copying more difficult.
      // TODO: Probably best to create a whitelist of event props
      for (var key in old) {
        // Safari 6.0.3 warns you if you try to copy deprecated layerX/Y
        // Chrome warns you if you try to copy deprecated keyboardEvent.keyLocation
        // and webkitMovementX/Y
        if (key !== 'layerX' && key !== 'layerY' && key !== 'keyLocation' && key !== 'webkitMovementX' && key !== 'webkitMovementY') {
          // Chrome 32+ warns if you try to copy deprecated returnValue, but
          // we still want to if preventDefault isn't supported (IE8).
          if (!(key === 'returnValue' && old.preventDefault)) {
            event[key] = old[key];
          }
        }
      }

      // The event occurred on this element
      if (!event.target) {
        event.target = event.srcElement || document_1;
      }

      // Handle which other element the event is related to
      if (!event.relatedTarget) {
        event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;
      }

      // Stop the default browser action
      event.preventDefault = function () {
        if (old.preventDefault) {
          old.preventDefault();
        }
        event.returnValue = false;
        old.returnValue = false;
        event.defaultPrevented = true;
      };

      event.defaultPrevented = false;

      // Stop the event from bubbling
      event.stopPropagation = function () {
        if (old.stopPropagation) {
          old.stopPropagation();
        }
        event.cancelBubble = true;
        old.cancelBubble = true;
        event.isPropagationStopped = returnTrue;
      };

      event.isPropagationStopped = returnFalse;

      // Stop the event from bubbling and executing other handlers
      event.stopImmediatePropagation = function () {
        if (old.stopImmediatePropagation) {
          old.stopImmediatePropagation();
        }
        event.isImmediatePropagationStopped = returnTrue;
        event.stopPropagation();
      };

      event.isImmediatePropagationStopped = returnFalse;

      // Handle mouse position
      if (event.clientX !== null && event.clientX !== undefined) {
        var doc = document_1.documentElement;
        var body = document_1.body;

        event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);
        event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0);
      }

      // Handle key presses
      event.which = event.charCode || event.keyCode;

      // Fix button for mouse clicks:
      // 0 == left; 1 == middle; 2 == right
      if (event.button !== null && event.button !== undefined) {

        // The following is disabled because it does not pass videojs-standard
        // and... yikes.
        /* eslint-disable */
        event.button = event.button & 1 ? 0 : event.button & 4 ? 1 : event.button & 2 ? 2 : 0;
        /* eslint-enable */
      }
    }

    // Returns fixed-up instance
    return event;
  }

  /**
   * Whether passive event listeners are supported
   */
  var _supportsPassive = false;

  (function () {
    try {
      var opts = Object.defineProperty({}, 'passive', {
        get: function get() {
          _supportsPassive = true;
        }
      });

      window_1.addEventListener('test', null, opts);
      window_1.removeEventListener('test', null, opts);
    } catch (e) {
      // disregard
    }
  })();

  /**
   * Touch events Chrome expects to be passive
   */
  var passiveEvents = ['touchstart', 'touchmove'];

  /**
   * Add an event listener to element
   * It stores the handler function in a separate cache object
   * and adds a generic handler to the element's event,
   * along with a unique id (guid) to the element.
   *
   * @param {Element|Object} elem
   *        Element or object to bind listeners to
   *
   * @param {string|string[]} type
   *        Type of event to bind to.
   *
   * @param {EventTarget~EventListener} fn
   *        Event listener.
   */
  function on(elem, type, fn) {
    if (Array.isArray(type)) {
      return _handleMultipleEvents(on, elem, type, fn);
    }

    var data = getData(elem);

    // We need a place to store all our handler data
    if (!data.handlers) {
      data.handlers = {};
    }

    if (!data.handlers[type]) {
      data.handlers[type] = [];
    }

    if (!fn.guid) {
      fn.guid = newGUID();
    }

    data.handlers[type].push(fn);

    if (!data.dispatcher) {
      data.disabled = false;

      data.dispatcher = function (event, hash) {

        if (data.disabled) {
          return;
        }

        event = fixEvent(event);

        var handlers = data.handlers[event.type];

        if (handlers) {
          // Copy handlers so if handlers are added/removed during the process it doesn't throw everything off.
          var handlersCopy = handlers.slice(0);

          for (var m = 0, n = handlersCopy.length; m < n; m++) {
            if (event.isImmediatePropagationStopped()) {
              break;
            } else {
              try {
                handlersCopy[m].call(elem, event, hash);
              } catch (e) {
                log$1.error(e);
              }
            }
          }
        }
      };
    }

    if (data.handlers[type].length === 1) {
      if (elem.addEventListener) {
        var options = false;

        if (_supportsPassive && passiveEvents.indexOf(type) > -1) {
          options = {passive: true};
        }
        elem.addEventListener(type, data.dispatcher, options);
      } else if (elem.attachEvent) {
        elem.attachEvent('on' + type, data.dispatcher);
      }
    }
  }

  /**
   * Removes event listeners from an element
   *
   * @param {Element|Object} elem
   *        Object to remove listeners from.
   *
   * @param {string|string[]} [type]
   *        Type of listener to remove. Don't include to remove all events from element.
   *
   * @param {EventTarget~EventListener} [fn]
   *        Specific listener to remove. Don't include to remove listeners for an event
   *        type.
   */
  function off(elem, type, fn) {
    // Don't want to add a cache object through getElData if not needed
    if (!hasData(elem)) {
      return;
    }

    var data = getData(elem);

    // If no events exist, nothing to unbind
    if (!data.handlers) {
      return;
    }

    if (Array.isArray(type)) {
      return _handleMultipleEvents(off, elem, type, fn);
    }

    // Utility function
    var removeType = function removeType(el, t) {
      data.handlers[t] = [];
      _cleanUpEvents(el, t);
    };

    // Are we removing all bound events?
    if (type === undefined) {
      for (var t in data.handlers) {
        if (Object.prototype.hasOwnProperty.call(data.handlers || {}, t)) {
          removeType(elem, t);
        }
      }
      return;
    }

    var handlers = data.handlers[type];

    // If no handlers exist, nothing to unbind
    if (!handlers) {
      return;
    }

    // If no listener was provided, remove all listeners for type
    if (!fn) {
      removeType(elem, type);
      return;
    }

    // We're only removing a single handler
    if (fn.guid) {
      for (var n = 0; n < handlers.length; n++) {
        if (handlers[n].guid === fn.guid) {
          handlers.splice(n--, 1);
        }
      }
    }

    _cleanUpEvents(elem, type);
  }

  /**
   * Trigger an event for an element
   *
   * @param {Element|Object} elem
   *        Element to trigger an event on
   *
   * @param {EventTarget~Event|string} event
   *        A string (the type) or an event object with a type attribute
   *
   * @param {Object} [hash]
   *        data hash to pass along with the event
   *
   * @return {boolean|undefined}
   *         - Returns the opposite of `defaultPrevented` if default was prevented
   *         - Otherwise returns undefined
   */
  function trigger(elem, event, hash) {
    // Fetches element data and a reference to the parent (for bubbling).
    // Don't want to add a data object to cache for every parent,
    // so checking hasElData first.
    var elemData = hasData(elem) ? getData(elem) : {};
    var parent = elem.parentNode || elem.ownerDocument;
    // type = event.type || event,
    // handler;

    // If an event name was passed as a string, creates an event out of it
    if (typeof event === 'string') {
      event = {type: event, target: elem};
    } else if (!event.target) {
      event.target = elem;
    }

    // Normalizes the event properties.
    event = fixEvent(event);

    // If the passed element has a dispatcher, executes the established handlers.
    if (elemData.dispatcher) {
      elemData.dispatcher.call(elem, event, hash);
    }

    // Unless explicitly stopped or the event does not bubble (e.g. media events)
    // recursively calls this function to bubble the event up the DOM.
    if (parent && !event.isPropagationStopped() && event.bubbles === true) {
      trigger.call(null, parent, event, hash);

      // If at the top of the DOM, triggers the default action unless disabled.
    } else if (!parent && !event.defaultPrevented) {
      var targetData = getData(event.target);

      // Checks if the target has a default action for this event.
      if (event.target[event.type]) {
        // Temporarily disables event dispatching on the target as we have already executed the handler.
        targetData.disabled = true;
        // Executes the default action.
        if (typeof event.target[event.type] === 'function') {
          event.target[event.type]();
        }
        // Re-enables event dispatching.
        targetData.disabled = false;
      }
    }

    // Inform the triggerer if the default was prevented by returning false
    return !event.defaultPrevented;
  }

  /**
   * Trigger a listener only once for an event
   *
   * @param {Element|Object} elem
   *        Element or object to bind to.
   *
   * @param {string|string[]} type
   *        Name/type of event
   *
   * @param {Event~EventListener} fn
   *        Event Listener function
   */
  function one(elem, type, fn) {
    if (Array.isArray(type)) {
      return _handleMultipleEvents(one, elem, type, fn);
    }
    var func = function func() {
      off(elem, type, func);
      fn.apply(this, arguments);
    };

    // copy the guid to the new function so it can removed using the original function's ID
    func.guid = fn.guid = fn.guid || newGUID();
    on(elem, type, func);
  }

  var Events = /*#__PURE__*/Object.freeze({
    fixEvent: fixEvent,
    on: on,
    off: off,
    trigger: trigger,
    one: one
  });

  /**
   * @file setup.js - Functions for setting up a player without
   * user interaction based on the data-setup `attribute` of the video tag.
   *
   * @module setup
   */

  var _windowLoaded = false;
  var videojs = void 0;

  /**
   * Set up any tags that have a data-setup `attribute` when the player is started.
   */
  var autoSetup = function autoSetup() {

    // Protect against breakage in non-browser environments and check global autoSetup option.
    if (!isReal() || videojs.options.autoSetup === false) {
      return;
    }

    var vids = Array.prototype.slice.call(document_1.getElementsByTagName('video'));
    var audios = Array.prototype.slice.call(document_1.getElementsByTagName('audio'));
    var divs = Array.prototype.slice.call(document_1.getElementsByTagName('video-js'));
    var mediaEls = vids.concat(audios, divs);

    // Check if any media elements exist
    if (mediaEls && mediaEls.length > 0) {

      for (var i = 0, e = mediaEls.length; i < e; i++) {
        var mediaEl = mediaEls[i];

        // Check if element exists, has getAttribute func.
        if (mediaEl && mediaEl.getAttribute) {

          // Make sure this player hasn't already been set up.
          if (mediaEl.player === undefined) {
            var options = mediaEl.getAttribute('data-setup');

            // Check if data-setup attr exists.
            // We only auto-setup if they've added the data-setup attr.
            if (options !== null) {
              // Create new video.js instance.
              videojs(mediaEl);
            }
          }

          // If getAttribute isn't defined, we need to wait for the DOM.
        } else {
          autoSetupTimeout(1);
          break;
        }
      }

      // No videos were found, so keep looping unless page is finished loading.
    } else if (!_windowLoaded) {
      autoSetupTimeout(1);
    }
  };

  /**
   * Wait until the page is loaded before running autoSetup. This will be called in
   * autoSetup if `hasLoaded` returns false.
   *
   * @param {number} wait
   *        How long to wait in ms
   *
   * @param {module:videojs} [vjs]
   *        The videojs library function
   */
  function autoSetupTimeout(wait, vjs) {
    if (vjs) {
      videojs = vjs;
    }

    window_1.setTimeout(autoSetup, wait);
  }

  if (isReal() && document_1.readyState === 'complete') {
    _windowLoaded = true;
  } else {
    /**
     * Listen for the load event on window, and set _windowLoaded to true.
     *
     * @listens load
     */
    one(window_1, 'load', function () {
      _windowLoaded = true;
    });
  }

  /**
   * @file stylesheet.js
   * @module stylesheet
   */

  /**
   * Create a DOM syle element given a className for it.
   *
   * @param {string} className
   *        The className to add to the created style element.
   *
   * @return {Element}
   *         The element that was created.
   */
  var createStyleElement = function createStyleElement(className) {
    var style = document_1.createElement('style');

    style.className = className;

    return style;
  };

  /**
   * Add text to a DOM element.
   *
   * @param {Element} el
   *        The Element to add text content to.
   *
   * @param {string} content
   *        The text to add to the element.
   */
  var setTextContent = function setTextContent(el, content) {
    if (el.styleSheet) {
      el.styleSheet.cssText = content;
    } else {
      el.textContent = content;
    }
  };

  /**
   * @file fn.js
   * @module fn
   */

  /**
   * Bind (a.k.a proxy or Context). A simple method for changing the context of a function
   * It also stores a unique id on the function so it can be easily removed from events.
   *
   * @param {Mixed} context
   *        The object to bind as scope.
   *
   * @param {Function} fn
   *        The function to be bound to a scope.
   *
   * @param {number} [uid]
   *        An optional unique ID for the function to be set
   *
   * @return {Function}
   *         The new function that will be bound into the context given
   */
  var bind = function bind(context, fn, uid) {
    // Make sure the function has a unique ID
    if (!fn.guid) {
      fn.guid = newGUID();
    }

    // Create the new function that changes the context
    var bound = function bound() {
      return fn.apply(context, arguments);
    };

    // Allow for the ability to individualize this function
    // Needed in the case where multiple objects might share the same prototype
    // IF both items add an event listener with the same function, then you try to remove just one
    // it will remove both because they both have the same guid.
    // when using this, you need to use the bind method when you remove the listener as well.
    // currently used in text tracks
    bound.guid = uid ? uid + '_' + fn.guid : fn.guid;

    return bound;
  };

  /**
   * Wraps the given function, `fn`, with a new function that only invokes `fn`
   * at most once per every `wait` milliseconds.
   *
   * @param  {Function} fn
   *         The function to be throttled.
   *
   * @param  {Number}   wait
   *         The number of milliseconds by which to throttle.
   *
   * @return {Function}
   */
  var throttle = function throttle(fn, wait) {
    var last = Date.now();

    var throttled = function throttled() {
      var now = Date.now();

      if (now - last >= wait) {
        fn.apply(undefined, arguments);
        last = now;
      }
    };

    return throttled;
  };

  /**
   * Creates a debounced function that delays invoking `func` until after `wait`
   * milliseconds have elapsed since the last time the debounced function was
   * invoked.
   *
   * Inspired by lodash and underscore implementations.
   *
   * @param  {Function} func
   *         The function to wrap with debounce behavior.
   *
   * @param  {number} wait
   *         The number of milliseconds to wait after the last invocation.
   *
   * @param  {boolean} [immediate]
   *         Whether or not to invoke the function immediately upon creation.
   *
   * @param  {Object} [context=window]
   *         The "context" in which the debounced function should debounce. For
   *         example, if this function should be tied to a Video.js player,
   *         the player can be passed here. Alternatively, defaults to the
   *         global `window` object.
   *
   * @return {Function}
   *         A debounced function.
   */
  var debounce = function debounce(func, wait, immediate) {
    var context = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : window_1;

    var timeout = void 0;

    /* eslint-disable consistent-this */
    return function () {
      var self = this;
      var args = arguments;

      var _later = function later() {
        timeout = null;
        _later = null;
        if (!immediate) {
          func.apply(self, args);
        }
      };

      if (!timeout && immediate) {
        func.apply(self, args);
      }

      context.clearTimeout(timeout);
      timeout = context.setTimeout(_later, wait);
    };
    /* eslint-enable consistent-this */
  };

  /**
   * @file src/js/event-target.js
   */

  /**
   * `EventTarget` is a class that can have the same API as the DOM `EventTarget`. It
   * adds shorthand functions that wrap around lengthy functions. For example:
   * the `on` function is a wrapper around `addEventListener`.
   *
   * @see [EventTarget Spec]{@link https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget}
   * @class EventTarget
   */
  var EventTarget = function EventTarget() {
  };

  /**
   * A Custom DOM event.
   *
   * @typedef {Object} EventTarget~Event
   * @see [Properties]{@link https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent}
   */

  /**
   * All event listeners should follow the following format.
   *
   * @callback EventTarget~EventListener
   * @this {EventTarget}
   *
   * @param {EventTarget~Event} event
   *        the event that triggered this function
   *
   * @param {Object} [hash]
   *        hash of data sent during the event
   */

  /**
   * An object containing event names as keys and booleans as values.
   *
   * > NOTE: If an event name is set to a true value here {@link EventTarget#trigger}
   *         will have extra functionality. See that function for more information.
   *
   * @property EventTarget.prototype.allowedEvents_
   * @private
   */
  EventTarget.prototype.allowedEvents_ = {};

  /**
   * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a
   * function that will get called when an event with a certain name gets triggered.
   *
   * @param {string|string[]} type
   *        An event name or an array of event names.
   *
   * @param {EventTarget~EventListener} fn
   *        The function to call with `EventTarget`s
   */
  EventTarget.prototype.on = function (type, fn) {
    // Remove the addEventListener alias before calling Events.on
    // so we don't get into an infinite type loop
    var ael = this.addEventListener;

    this.addEventListener = function () {
    };
    on(this, type, fn);
    this.addEventListener = ael;
  };

  /**
   * An alias of {@link EventTarget#on}. Allows `EventTarget` to mimic
   * the standard DOM API.
   *
   * @function
   * @see {@link EventTarget#on}
   */
  EventTarget.prototype.addEventListener = EventTarget.prototype.on;

  /**
   * Removes an `event listener` for a specific event from an instance of `EventTarget`.
   * This makes it so that the `event listener` will no longer get called when the
   * named event happens.
   *
   * @param {string|string[]} type
   *        An event name or an array of event names.
   *
   * @param {EventTarget~EventListener} fn
   *        The function to remove.
   */
  EventTarget.prototype.off = function (type, fn) {
    off(this, type, fn);
  };

  /**
   * An alias of {@link EventTarget#off}. Allows `EventTarget` to mimic
   * the standard DOM API.
   *
   * @function
   * @see {@link EventTarget#off}
   */
  EventTarget.prototype.removeEventListener = EventTarget.prototype.off;

  /**
   * This function will add an `event listener` that gets triggered only once. After the
   * first trigger it will get removed. This is like adding an `event listener`
   * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.
   *
   * @param {string|string[]} type
   *        An event name or an array of event names.
   *
   * @param {EventTarget~EventListener} fn
   *        The function to be called once for each event name.
   */
  EventTarget.prototype.one = function (type, fn) {
    // Remove the addEventListener alialing Events.on
    // so we don't get into an infinite type loop
    var ael = this.addEventListener;

    this.addEventListener = function () {
    };
    one(this, type, fn);
    this.addEventListener = ael;
  };

  /**
   * This function causes an event to happen. This will then cause any `event listeners`
   * that are waiting for that event, to get called. If there are no `event listeners`
   * for an event then nothing will happen.
   *
   * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.
   * Trigger will also call the `on` + `uppercaseEventName` function.
   *
   * Example:
   * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call
   * `onClick` if it exists.
   *
   * @param {string|EventTarget~Event|Object} event
   *        The name of the event, an `Event`, or an object with a key of type set to
   *        an event name.
   */
  EventTarget.prototype.trigger = function (event) {
    var type = event.type || event;

    if (typeof event === 'string') {
      event = {type: type};
    }
    event = fixEvent(event);

    if (this.allowedEvents_[type] && this['on' + type]) {
      this['on' + type](event);
    }

    trigger(this, event);
  };

  /**
   * An alias of {@link EventTarget#trigger}. Allows `EventTarget` to mimic
   * the standard DOM API.
   *
   * @function
   * @see {@link EventTarget#trigger}
   */
  EventTarget.prototype.dispatchEvent = EventTarget.prototype.trigger;

  /**
   * @file mixins/evented.js
   * @module evented
   */

  /**
   * Returns whether or not an object has had the evented mixin applied.
   *
   * @param  {Object} object
   *         An object to test.
   *
   * @return {boolean}
   *         Whether or not the object appears to be evented.
   */
  var isEvented = function isEvented(object) {
    return object instanceof EventTarget || !!object.eventBusEl_ && ['on', 'one', 'off', 'trigger'].every(function (k) {
      return typeof object[k] === 'function';
    });
  };

  /**
   * Whether a value is a valid event type - non-empty string or array.
   *
   * @private
   * @param  {string|Array} type
   *         The type value to test.
   *
   * @return {boolean}
   *         Whether or not the type is a valid event type.
   */
  var isValidEventType = function isValidEventType(type) {
    return (
      // The regex here verifies that the `type` contains at least one non-
      // whitespace character.
      typeof type === 'string' && /\S/.test(type) || Array.isArray(type) && !!type.length
    );
  };

  /**
   * Validates a value to determine if it is a valid event target. Throws if not.
   *
   * @private
   * @throws {Error}
   *         If the target does not appear to be a valid event target.
   *
   * @param  {Object} target
   *         The object to test.
   */
  var validateTarget = function validateTarget(target) {
    if (!target.nodeName && !isEvented(target)) {
      throw new Error('Invalid target; must be a DOM node or evented object.');
    }
  };

  /**
   * Validates a value to determine if it is a valid event target. Throws if not.
   *
   * @private
   * @throws {Error}
   *         If the type does not appear to be a valid event type.
   *
   * @param  {string|Array} type
   *         The type to test.
   */
  var validateEventType = function validateEventType(type) {
    if (!isValidEventType(type)) {
      throw new Error('Invalid event type; must be a non-empty string or array.');
    }
  };

  /**
   * Validates a value to determine if it is a valid listener. Throws if not.
   *
   * @private
   * @throws {Error}
   *         If the listener is not a function.
   *
   * @param  {Function} listener
   *         The listener to test.
   */
  var validateListener = function validateListener(listener) {
    if (typeof listener !== 'function') {
      throw new Error('Invalid listener; must be a function.');
    }
  };

  /**
   * Takes an array of arguments given to `on()` or `one()`, validates them, and
   * normalizes them into an object.
   *
   * @private
   * @param  {Object} self
   *         The evented object on which `on()` or `one()` was called. This
   *         object will be bound as the `this` value for the listener.
   *
   * @param  {Array} args
   *         An array of arguments passed to `on()` or `one()`.
   *
   * @return {Object}
   *         An object containing useful values for `on()` or `one()` calls.
   */
  var normalizeListenArgs = function normalizeListenArgs(self, args) {

    // If the number of arguments is less than 3, the target is always the
    // evented object itself.
    var isTargetingSelf = args.length < 3 || args[0] === self || args[0] === self.eventBusEl_;
    var target = void 0;
    var type = void 0;
    var listener = void 0;

    if (isTargetingSelf) {
      target = self.eventBusEl_;

      // Deal with cases where we got 3 arguments, but we are still listening to
      // the evented object itself.
      if (args.length >= 3) {
        args.shift();
      }

      type = args[0];
      listener = args[1];
    } else {
      target = args[0];
      type = args[1];
      listener = args[2];
    }

    validateTarget(target);
    validateEventType(type);
    validateListener(listener);

    listener = bind(self, listener);

    return {isTargetingSelf: isTargetingSelf, target: target, type: type, listener: listener};
  };

  /**
   * Adds the listener to the event type(s) on the target, normalizing for
   * the type of target.
   *
   * @private
   * @param  {Element|Object} target
   *         A DOM node or evented object.
   *
   * @param  {string} method
   *         The event binding method to use ("on" or "one").
   *
   * @param  {string|Array} type
   *         One or more event type(s).
   *
   * @param  {Function} listener
   *         A listener function.
   */
  var listen = function listen(target, method, type, listener) {
    validateTarget(target);

    if (target.nodeName) {
      Events[method](target, type, listener);
    } else {
      target[method](type, listener);
    }
  };

  /**
   * Contains methods that provide event capabilities to an object which is passed
   * to {@link module:evented|evented}.
   *
   * @mixin EventedMixin
   */
  var EventedMixin = {

    /**
     * Add a listener to an event (or events) on this object or another evented
     * object.
     *
     * @param  {string|Array|Element|Object} targetOrType
     *         If this is a string or array, it represents the event type(s)
     *         that will trigger the listener.
     *
     *         Another evented object can be passed here instead, which will
     *         cause the listener to listen for events on _that_ object.
     *
     *         In either case, the listener's `this` value will be bound to
     *         this object.
     *
     * @param  {string|Array|Function} typeOrListener
     *         If the first argument was a string or array, this should be the
     *         listener function. Otherwise, this is a string or array of event
     *         type(s).
     *
     * @param  {Function} [listener]
     *         If the first argument was another evented object, this will be
     *         the listener function.
     */
    on: function on$$1() {
      var _this = this;

      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
        args[_key] = arguments[_key];
      }

      var _normalizeListenArgs = normalizeListenArgs(this, args),
        isTargetingSelf = _normalizeListenArgs.isTargetingSelf,
        target = _normalizeListenArgs.target,
        type = _normalizeListenArgs.type,
        listener = _normalizeListenArgs.listener;

      listen(target, 'on', type, listener);

      // If this object is listening to another evented object.
      if (!isTargetingSelf) {

        // If this object is disposed, remove the listener.
        var removeListenerOnDispose = function removeListenerOnDispose() {
          return _this.off(target, type, listener);
        };

        // Use the same function ID as the listener so we can remove it later it
        // using the ID of the original listener.
        removeListenerOnDispose.guid = listener.guid;

        // Add a listener to the target's dispose event as well. This ensures
        // that if the target is disposed BEFORE this object, we remove the
        // removal listener that was just added. Otherwise, we create a memory leak.
        var removeRemoverOnTargetDispose = function removeRemoverOnTargetDispose() {
          return _this.off('dispose', removeListenerOnDispose);
        };

        // Use the same function ID as the listener so we can remove it later
        // it using the ID of the original listener.
        removeRemoverOnTargetDispose.guid = listener.guid;

        listen(this, 'on', 'dispose', removeListenerOnDispose);
        listen(target, 'on', 'dispose', removeRemoverOnTargetDispose);
      }
    },


    /**
     * Add a listener to an event (or events) on this object or another evented
     * object. The listener will only be called once and then removed.
     *
     * @param  {string|Array|Element|Object} targetOrType
     *         If this is a string or array, it represents the event type(s)
     *         that will trigger the listener.
     *
     *         Another evented object can be passed here instead, which will
     *         cause the listener to listen for events on _that_ object.
     *
     *         In either case, the listener's `this` value will be bound to
     *         this object.
     *
     * @param  {string|Array|Function} typeOrListener
     *         If the first argument was a string or array, this should be the
     *         listener function. Otherwise, this is a string or array of event
     *         type(s).
     *
     * @param  {Function} [listener]
     *         If the first argument was another evented object, this will be
     *         the listener function.
     */
    one: function one$$1() {
      var _this2 = this;

      for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
        args[_key2] = arguments[_key2];
      }

      var _normalizeListenArgs2 = normalizeListenArgs(this, args),
        isTargetingSelf = _normalizeListenArgs2.isTargetingSelf,
        target = _normalizeListenArgs2.target,
        type = _normalizeListenArgs2.type,
        listener = _normalizeListenArgs2.listener;

      // Targeting this evented object.


      if (isTargetingSelf) {
        listen(target, 'one', type, listener);

        // Targeting another evented object.
      } else {
        var wrapper = function wrapper() {
          for (var _len3 = arguments.length, largs = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
            largs[_key3] = arguments[_key3];
          }

          _this2.off(target, type, wrapper);
          listener.apply(null, largs);
        };

        // Use the same function ID as the listener so we can remove it later
        // it using the ID of the original listener.
        wrapper.guid = listener.guid;
        listen(target, 'one', type, wrapper);
      }
    },


    /**
     * Removes listener(s) from event(s) on an evented object.
     *
     * @param  {string|Array|Element|Object} [targetOrType]
     *         If this is a string or array, it represents the event type(s).
     *
     *         Another evented object can be passed here instead, in which case
     *         ALL 3 arguments are _required_.
     *
     * @param  {string|Array|Function} [typeOrListener]
     *         If the first argument was a string or array, this may be the
     *         listener function. Otherwise, this is a string or array of event
     *         type(s).
     *
     * @param  {Function} [listener]
     *         If the first argument was another evented object, this will be
     *         the listener function; otherwise, _all_ listeners bound to the
     *         event type(s) will be removed.
     */
    off: function off$$1(targetOrType, typeOrListener, listener) {

      // Targeting this evented object.
      if (!targetOrType || isValidEventType(targetOrType)) {
        off(this.eventBusEl_, targetOrType, typeOrListener);

        // Targeting another evented object.
      } else {
        var target = targetOrType;
        var type = typeOrListener;

        // Fail fast and in a meaningful way!
        validateTarget(target);
        validateEventType(type);
        validateListener(listener);

        // Ensure there's at least a guid, even if the function hasn't been used
        listener = bind(this, listener);

        // Remove the dispose listener on this evented object, which was given
        // the same guid as the event listener in on().
        this.off('dispose', listener);

        if (target.nodeName) {
          off(target, type, listener);
          off(target, 'dispose', listener);
        } else if (isEvented(target)) {
          target.off(type, listener);
          target.off('dispose', listener);
        }
      }
    },


    /**
     * Fire an event on this evented object, causing its listeners to be called.
     *
     * @param   {string|Object} event
     *          An event type or an object with a type property.
     *
     * @param   {Object} [hash]
     *          An additional object to pass along to listeners.
     *
     * @returns {boolean}
     *          Whether or not the default behavior was prevented.
     */
    trigger: function trigger$$1(event, hash) {
      return trigger(this.eventBusEl_, event, hash);
    }
  };

  /**
   * Applies {@link module:evented~EventedMixin|EventedMixin} to a target object.
   *
   * @param  {Object} target
   *         The object to which to add event methods.
   *
   * @param  {Object} [options={}]
   *         Options for customizing the mixin behavior.
   *
   * @param  {String} [options.eventBusKey]
   *         By default, adds a `eventBusEl_` DOM element to the target object,
   *         which is used as an event bus. If the target object already has a
   *         DOM element that should be used, pass its key here.
   *
   * @return {Object}
   *         The target object.
   */
  function evented(target) {
    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    var eventBusKey = options.eventBusKey;

    // Set or create the eventBusEl_.

    if (eventBusKey) {
      if (!target[eventBusKey].nodeName) {
        throw new Error('The eventBusKey "' + eventBusKey + '" does not refer to an element.');
      }
      target.eventBusEl_ = target[eventBusKey];
    } else {
      target.eventBusEl_ = createEl('span', {className: 'vjs-event-bus'});
    }

    assign(target, EventedMixin);

    // When any evented object is disposed, it removes all its listeners.
    target.on('dispose', function () {
      target.off();
      window_1.setTimeout(function () {
        target.eventBusEl_ = null;
      }, 0);
    });

    return target;
  }

  /**
   * @file mixins/stateful.js
   * @module stateful
   */

  /**
   * Contains methods that provide statefulness to an object which is passed
   * to {@link module:stateful}.
   *
   * @mixin StatefulMixin
   */
  var StatefulMixin = {

    /**
     * A hash containing arbitrary keys and values representing the state of
     * the object.
     *
     * @type {Object}
     */
    state: {},

    /**
     * Set the state of an object by mutating its
     * {@link module:stateful~StatefulMixin.state|state} object in place.
     *
     * @fires   module:stateful~StatefulMixin#statechanged
     * @param   {Object|Function} stateUpdates
     *          A new set of properties to shallow-merge into the plugin state.
     *          Can be a plain object or a function returning a plain object.
     *
     * @returns {Object|undefined}
     *          An object containing changes that occurred. If no changes
     *          occurred, returns `undefined`.
     */
    setState: function setState(stateUpdates) {
      var _this = this;

      // Support providing the `stateUpdates` state as a function.
      if (typeof stateUpdates === 'function') {
        stateUpdates = stateUpdates();
      }

      var changes = void 0;

      each(stateUpdates, function (value, key) {

        // Record the change if the value is different from what's in the
        // current state.
        if (_this.state[key] !== value) {
          changes = changes || {};
          changes[key] = {
            from: _this.state[key],
            to: value
          };
        }

        _this.state[key] = value;
      });

      // Only trigger "statechange" if there were changes AND we have a trigger
      // function. This allows us to not require that the target object be an
      // evented object.
      if (changes && isEvented(this)) {

        /**
         * An event triggered on an object that is both
         * {@link module:stateful|stateful} and {@link module:evented|evented}
         * indicating that its state has changed.
         *
         * @event    module:stateful~StatefulMixin#statechanged
         * @type     {Object}
         * @property {Object} changes
         *           A hash containing the properties that were changed and
         *           the values they were changed `from` and `to`.
         */
        this.trigger({
          changes: changes,
          type: 'statechanged'
        });
      }

      return changes;
    }
  };

  /**
   * Applies {@link module:stateful~StatefulMixin|StatefulMixin} to a target
   * object.
   *
   * If the target object is {@link module:evented|evented} and has a
   * `handleStateChanged` method, that method will be automatically bound to the
   * `statechanged` event on itself.
   *
   * @param   {Object} target
   *          The object to be made stateful.
   *
   * @param   {Object} [defaultState]
   *          A default set of properties to populate the newly-stateful object's
   *          `state` property.
   *
   * @returns {Object}
   *          Returns the `target`.
   */
  function stateful(target, defaultState) {
    assign(target, StatefulMixin);

    // This happens after the mixing-in because we need to replace the `state`
    // added in that step.
    target.state = assign({}, target.state, defaultState);

    // Auto-bind the `handleStateChanged` method of the target object if it exists.
    if (typeof target.handleStateChanged === 'function' && isEvented(target)) {
      target.on('statechanged', target.handleStateChanged);
    }

    return target;
  }

  /**
   * @file to-title-case.js
   * @module to-title-case
   */

  /**
   * Uppercase the first letter of a string.
   *
   * @param {string} string
   *        String to be uppercased
   *
   * @return {string}
   *         The string with an uppercased first letter
   */
  function toTitleCase(string) {
    if (typeof string !== 'string') {
      return string;
    }

    return string.charAt(0).toUpperCase() + string.slice(1);
  }

  /**
   * Compares the TitleCase versions of the two strings for equality.
   *
   * @param {string} str1
   *        The first string to compare
   *
   * @param {string} str2
   *        The second string to compare
   *
   * @return {boolean}
   *         Whether the TitleCase versions of the strings are equal
   */
  function titleCaseEquals(str1, str2) {
    return toTitleCase(str1) === toTitleCase(str2);
  }

  /**
   * @file merge-options.js
   * @module merge-options
   */

  /**
   * Deep-merge one or more options objects, recursively merging **only** plain
   * object properties.
   *
   * @param   {Object[]} sources
   *          One or more objects to merge into a new object.
   *
   * @returns {Object}
   *          A new object that is the merged result of all sources.
   */
  function mergeOptions() {
    var result = {};

    for (var _len = arguments.length, sources = Array(_len), _key = 0; _key < _len; _key++) {
      sources[_key] = arguments[_key];
    }

    sources.forEach(function (source) {
      if (!source) {
        return;
      }

      each(source, function (value, key) {
        if (!isPlain(value)) {
          result[key] = value;
          return;
        }

        if (!isPlain(result[key])) {
          result[key] = {};
        }

        result[key] = mergeOptions(result[key], value);
      });
    });

    return result;
  }

  /**
   * Player Component - Base class for all UI objects
   *
   * @file component.js
   */

  /**
   * Base class for all UI Components.
   * Components are UI objects which represent both a javascript object and an element
   * in the DOM. They can be children of other components, and can have
   * children themselves.
   *
   * Components can also use methods from {@link EventTarget}
   */

  var Component = function () {

    /**
     * A callback that is called when a component is ready. Does not have any
     * paramters and any callback value will be ignored.
     *
     * @callback Component~ReadyCallback
     * @this Component
     */

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     *
     * @param {Object[]} [options.children]
     *        An array of children objects to intialize this component with. Children objects have
     *        a name property that will be used if more than one component of the same type needs to be
     *        added.
     *
     * @param {Component~ReadyCallback} [ready]
     *        Function that gets called when the `Component` is ready.
     */
    function Component(player, options, ready) {
      classCallCheck(this, Component);


      // The component might be the player itself and we can't pass `this` to super
      if (!player && this.play) {
        this.player_ = player = this; // eslint-disable-line
      } else {
        this.player_ = player;
      }

      // Make a copy of prototype.options_ to protect against overriding defaults
      this.options_ = mergeOptions({}, this.options_);

      // Updated options with supplied options
      options = this.options_ = mergeOptions(this.options_, options);

      // Get ID from options or options element if one is supplied
      this.id_ = options.id || options.el && options.el.id;

      // If there was no ID from the options, generate one
      if (!this.id_) {
        // Don't require the player ID function in the case of mock players
        var id = player && player.id && player.id() || 'no_player';

        this.id_ = id + '_component_' + newGUID();
      }

      this.name_ = options.name || null;

      // Create element if one wasn't provided in options
      if (options.el) {
        this.el_ = options.el;
      } else if (options.createEl !== false) {
        this.el_ = this.createEl();
      }

      // if evented is anything except false, we want to mixin in evented
      if (options.evented !== false) {
        // Make this an evented object and use `el_`, if available, as its event bus
        evented(this, {eventBusKey: this.el_ ? 'el_' : null});
      }
      stateful(this, this.constructor.defaultState);

      this.children_ = [];
      this.childIndex_ = {};
      this.childNameIndex_ = {};

      // Add any child components in options
      if (options.initChildren !== false) {
        this.initChildren();
      }

      this.ready(ready);
      // Don't want to trigger ready here or it will before init is actually
      // finished for all children that run this constructor

      if (options.reportTouchActivity !== false) {
        this.enableTouchActivity();
      }
    }

    /**
     * Dispose of the `Component` and all child components.
     *
     * @fires Component#dispose
     */


    Component.prototype.dispose = function dispose() {

      /**
       * Triggered when a `Component` is disposed.
       *
       * @event Component#dispose
       * @type {EventTarget~Event}
       *
       * @property {boolean} [bubbles=false]
       *           set to false so that the close event does not
       *           bubble up
       */
      this.trigger({type: 'dispose', bubbles: false});

      // Dispose all children.
      if (this.children_) {
        for (var i = this.children_.length - 1; i >= 0; i--) {
          if (this.children_[i].dispose) {
            this.children_[i].dispose();
          }
        }
      }

      // Delete child references
      this.children_ = null;
      this.childIndex_ = null;
      this.childNameIndex_ = null;

      if (this.el_) {
        // Remove element from DOM
        if (this.el_.parentNode) {
          this.el_.parentNode.removeChild(this.el_);
        }

        removeData(this.el_);
        this.el_ = null;
      }

      // remove reference to the player after disposing of the element
      this.player_ = null;
    };

    /**
     * Return the {@link Player} that the `Component` has attached to.
     *
     * @return {Player}
     *         The player that this `Component` has attached to.
     */


    Component.prototype.player = function player() {
      return this.player_;
    };

    /**
     * Deep merge of options objects with new options.
     * > Note: When both `obj` and `options` contain properties whose values are objects.
     *         The two properties get merged using {@link module:mergeOptions}
     *
     * @param {Object} obj
     *        The object that contains new options.
     *
     * @return {Object}
     *         A new object of `this.options_` and `obj` merged together.
     *
     * @deprecated since version 5
     */


    Component.prototype.options = function options(obj) {
      log$1.warn('this.options() has been deprecated and will be moved to the constructor in 6.0');

      if (!obj) {
        return this.options_;
      }

      this.options_ = mergeOptions(this.options_, obj);
      return this.options_;
    };

    /**
     * Get the `Component`s DOM element
     *
     * @return {Element}
     *         The DOM element for this `Component`.
     */


    Component.prototype.el = function el() {
      return this.el_;
    };

    /**
     * Create the `Component`s DOM element.
     *
     * @param {string} [tagName]
     *        Element's DOM node type. e.g. 'div'
     *
     * @param {Object} [properties]
     *        An object of properties that should be set.
     *
     * @param {Object} [attributes]
     *        An object of attributes that should be set.
     *
     * @return {Element}
     *         The element that gets created.
     */


    Component.prototype.createEl = function createEl$$1(tagName, properties, attributes) {
      return createEl(tagName, properties, attributes);
    };

    /**
     * Localize a string given the string in english.
     *
     * If tokens are provided, it'll try and run a simple token replacement on the provided string.
     * The tokens it looks for look like `{1}` with the index being 1-indexed into the tokens array.
     *
     * If a `defaultValue` is provided, it'll use that over `string`,
     * if a value isn't found in provided language files.
     * This is useful if you want to have a descriptive key for token replacement
     * but have a succinct localized string and not require `en.json` to be included.
     *
     * Currently, it is used for the progress bar timing.
     * ```js
     * {
     *   "progress bar timing: currentTime={1} duration={2}": "{1} of {2}"
     * }
     * ```
     * It is then used like so:
     * ```js
     * this.localize('progress bar timing: currentTime={1} duration{2}',
     *               [this.player_.currentTime(), this.player_.duration()],
     *               '{1} of {2}');
     * ```
     *
     * Which outputs something like: `01:23 of 24:56`.
     *
     *
     * @param {string} string
     *        The string to localize and the key to lookup in the language files.
     * @param {string[]} [tokens]
     *        If the current item has token replacements, provide the tokens here.
     * @param {string} [defaultValue]
     *        Defaults to `string`. Can be a default value to use for token replacement
     *        if the lookup key is needed to be separate.
     *
     * @return {string}
     *         The localized string or if no localization exists the english string.
     */


    Component.prototype.localize = function localize(string, tokens) {
      var defaultValue = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : string;

      var code = this.player_.language && this.player_.language();
      var languages = this.player_.languages && this.player_.languages();
      var language = languages && languages[code];
      var primaryCode = code && code.split('-')[0];
      var primaryLang = languages && languages[primaryCode];

      var localizedString = defaultValue;

      if (language && language[string]) {
        localizedString = language[string];
      } else if (primaryLang && primaryLang[string]) {
        localizedString = primaryLang[string];
      }

      if (tokens) {
        localizedString = localizedString.replace(/\{(\d+)\}/g, function (match, index) {
          var value = tokens[index - 1];
          var ret = value;

          if (typeof value === 'undefined') {
            ret = match;
          }

          return ret;
        });
      }

      return localizedString;
    };

    /**
     * Return the `Component`s DOM element. This is where children get inserted.
     * This will usually be the the same as the element returned in {@link Component#el}.
     *
     * @return {Element}
     *         The content element for this `Component`.
     */


    Component.prototype.contentEl = function contentEl() {
      return this.contentEl_ || this.el_;
    };

    /**
     * Get this `Component`s ID
     *
     * @return {string}
     *         The id of this `Component`
     */


    Component.prototype.id = function id() {
      return this.id_;
    };

    /**
     * Get the `Component`s name. The name gets used to reference the `Component`
     * and is set during registration.
     *
     * @return {string}
     *         The name of this `Component`.
     */


    Component.prototype.name = function name() {
      return this.name_;
    };

    /**
     * Get an array of all child components
     *
     * @return {Array}
     *         The children
     */


    Component.prototype.children = function children() {
      return this.children_;
    };

    /**
     * Returns the child `Component` with the given `id`.
     *
     * @param {string} id
     *        The id of the child `Component` to get.
     *
     * @return {Component|undefined}
     *         The child `Component` with the given `id` or undefined.
     */


    Component.prototype.getChildById = function getChildById(id) {
      return this.childIndex_[id];
    };

    /**
     * Returns the child `Component` with the given `name`.
     *
     * @param {string} name
     *        The name of the child `Component` to get.
     *
     * @return {Component|undefined}
     *         The child `Component` with the given `name` or undefined.
     */


    Component.prototype.getChild = function getChild(name) {
      if (!name) {
        return;
      }

      name = toTitleCase(name);

      return this.childNameIndex_[name];
    };

    /**
     * Add a child `Component` inside the current `Component`.
     *
     *
     * @param {string|Component} child
     *        The name or instance of a child to add.
     *
     * @param {Object} [options={}]
     *        The key/value store of options that will get passed to children of
     *        the child.
     *
     * @param {number} [index=this.children_.length]
     *        The index to attempt to add a child into.
     *
     * @return {Component}
     *         The `Component` that gets added as a child. When using a string the
     *         `Component` will get created by this process.
     */


    Component.prototype.addChild = function addChild(child) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      var index = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : this.children_.length;

      var component = void 0;
      var componentName = void 0;

      // If child is a string, create component with options
      if (typeof child === 'string') {
        componentName = toTitleCase(child);

        var componentClassName = options.componentClass || componentName;

        // Set name through options
        options.name = componentName;

        // Create a new object & element for this controls set
        // If there's no .player_, this is a player
        var ComponentClass = Component.getComponent(componentClassName);

        if (!ComponentClass) {
          throw new Error('Component ' + componentClassName + ' does not exist');
        }

        // data stored directly on the videojs object may be
        // misidentified as a component to retain
        // backwards-compatibility with 4.x. check to make sure the
        // component class can be instantiated.
        if (typeof ComponentClass !== 'function') {
          return null;
        }

        component = new ComponentClass(this.player_ || this, options);

        // child is a component instance
      } else {
        component = child;
      }

      this.children_.splice(index, 0, component);

      if (typeof component.id === 'function') {
        this.childIndex_[component.id()] = component;
      }

      // If a name wasn't used to create the component, check if we can use the
      // name function of the component
      componentName = componentName || component.name && toTitleCase(component.name());

      if (componentName) {
        this.childNameIndex_[componentName] = component;
      }

      // Add the UI object's element to the container div (box)
      // Having an element is not required
      if (typeof component.el === 'function' && component.el()) {
        var childNodes = this.contentEl().children;
        var refNode = childNodes[index] || null;

        this.contentEl().insertBefore(component.el(), refNode);
      }

      // Return so it can stored on parent object if desired.
      return component;
    };

    /**
     * Remove a child `Component` from this `Component`s list of children. Also removes
     * the child `Component`s element from this `Component`s element.
     *
     * @param {Component} component
     *        The child `Component` to remove.
     */


    Component.prototype.removeChild = function removeChild(component) {
      if (typeof component === 'string') {
        component = this.getChild(component);
      }

      if (!component || !this.children_) {
        return;
      }

      var childFound = false;

      for (var i = this.children_.length - 1; i >= 0; i--) {
        if (this.children_[i] === component) {
          childFound = true;
          this.children_.splice(i, 1);
          break;
        }
      }

      if (!childFound) {
        return;
      }

      this.childIndex_[component.id()] = null;
      this.childNameIndex_[component.name()] = null;

      var compEl = component.el();

      if (compEl && compEl.parentNode === this.contentEl()) {
        this.contentEl().removeChild(component.el());
      }
    };

    /**
     * Add and initialize default child `Component`s based upon options.
     */


    Component.prototype.initChildren = function initChildren() {
      var _this = this;

      var children = this.options_.children;

      if (children) {
        // `this` is `parent`
        var parentOptions = this.options_;

        var handleAdd = function handleAdd(child) {
          var name = child.name;
          var opts = child.opts;

          // Allow options for children to be set at the parent options
          // e.g. videojs(id, { controlBar: false });
          // instead of videojs(id, { children: { controlBar: false });
          if (parentOptions[name] !== undefined) {
            opts = parentOptions[name];
          }

          // Allow for disabling default components
          // e.g. options['children']['posterImage'] = false
          if (opts === false) {
            return;
          }

          // Allow options to be passed as a simple boolean if no configuration
          // is necessary.
          if (opts === true) {
            opts = {};
          }

          // We also want to pass the original player options
          // to each component as well so they don't need to
          // reach back into the player for options later.
          opts.playerOptions = _this.options_.playerOptions;

          // Create and add the child component.
          // Add a direct reference to the child by name on the parent instance.
          // If two of the same component are used, different names should be supplied
          // for each
          var newChild = _this.addChild(name, opts);

          if (newChild) {
            _this[name] = newChild;
          }
        };

        // Allow for an array of children details to passed in the options
        var workingChildren = void 0;
        var Tech = Component.getComponent('Tech');

        if (Array.isArray(children)) {
          workingChildren = children;
        } else {
          workingChildren = Object.keys(children);
        }

        workingChildren
        // children that are in this.options_ but also in workingChildren  would
        // give us extra children we do not want. So, we want to filter them out.
          .concat(Object.keys(this.options_).filter(function (child) {
            return !workingChildren.some(function (wchild) {
              if (typeof wchild === 'string') {
                return child === wchild;
              }
              return child === wchild.name;
            });
          })).map(function (child) {
          var name = void 0;
          var opts = void 0;

          if (typeof child === 'string') {
            name = child;
            opts = children[name] || _this.options_[name] || {};
          } else {
            name = child.name;
            opts = child;
          }

          return {name: name, opts: opts};
        }).filter(function (child) {
          // we have to make sure that child.name isn't in the techOrder since
          // techs are registerd as Components but can't aren't compatible
          // See https://github.com/videojs/video.js/issues/2772
          var c = Component.getComponent(child.opts.componentClass || toTitleCase(child.name));

          return c && !Tech.isTech(c);
        }).forEach(handleAdd);
      }
    };

    /**
     * Builds the default DOM class name. Should be overriden by sub-components.
     *
     * @return {string}
     *         The DOM class name for this object.
     *
     * @abstract
     */


    Component.prototype.buildCSSClass = function buildCSSClass() {
      // Child classes can include a function that does:
      // return 'CLASS NAME' + this._super();
      return '';
    };

    /**
     * Bind a listener to the component's ready state.
     * Different from event listeners in that if the ready event has already happened
     * it will trigger the function immediately.
     *
     * @return {Component}
     *         Returns itself; method can be chained.
     */


    Component.prototype.ready = function ready(fn) {
      var sync = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

      if (!fn) {
        return;
      }

      if (!this.isReady_) {
        this.readyQueue_ = this.readyQueue_ || [];
        this.readyQueue_.push(fn);
        return;
      }

      if (sync) {
        fn.call(this);
      } else {
        // Call the function asynchronously by default for consistency
        this.setTimeout(fn, 1);
      }
    };

    /**
     * Trigger all the ready listeners for this `Component`.
     *
     * @fires Component#ready
     */


    Component.prototype.triggerReady = function triggerReady() {
      this.isReady_ = true;

      // Ensure ready is triggered asynchronously
      this.setTimeout(function () {
        var readyQueue = this.readyQueue_;

        // Reset Ready Queue
        this.readyQueue_ = [];

        if (readyQueue && readyQueue.length > 0) {
          readyQueue.forEach(function (fn) {
            fn.call(this);
          }, this);
        }

        // Allow for using event listeners also
        /**
         * Triggered when a `Component` is ready.
         *
         * @event Component#ready
         * @type {EventTarget~Event}
         */
        this.trigger('ready');
      }, 1);
    };

    /**
     * Find a single DOM element matching a `selector`. This can be within the `Component`s
     * `contentEl()` or another custom context.
     *
     * @param {string} selector
     *        A valid CSS selector, which will be passed to `querySelector`.
     *
     * @param {Element|string} [context=this.contentEl()]
     *        A DOM element within which to query. Can also be a selector string in
     *        which case the first matching element will get used as context. If
     *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns
     *        nothing it falls back to `document`.
     *
     * @return {Element|null}
     *         the dom element that was found, or null
     *
     * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)
     */


    Component.prototype.$ = function $$$1(selector, context) {
      return $(selector, context || this.contentEl());
    };

    /**
     * Finds all DOM element matching a `selector`. This can be within the `Component`s
     * `contentEl()` or another custom context.
     *
     * @param {string} selector
     *        A valid CSS selector, which will be passed to `querySelectorAll`.
     *
     * @param {Element|string} [context=this.contentEl()]
     *        A DOM element within which to query. Can also be a selector string in
     *        which case the first matching element will get used as context. If
     *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns
     *        nothing it falls back to `document`.
     *
     * @return {NodeList}
     *         a list of dom elements that were found
     *
     * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)
     */


    Component.prototype.$$ = function $$$$1(selector, context) {
      return $$(selector, context || this.contentEl());
    };

    /**
     * Check if a component's element has a CSS class name.
     *
     * @param {string} classToCheck
     *        CSS class name to check.
     *
     * @return {boolean}
     *         - True if the `Component` has the class.
     *         - False if the `Component` does not have the class`
     */


    Component.prototype.hasClass = function hasClass$$1(classToCheck) {
      return hasClass(this.el_, classToCheck);
    };

    /**
     * Add a CSS class name to the `Component`s element.
     *
     * @param {string} classToAdd
     *        CSS class name to add
     */


    Component.prototype.addClass = function addClass$$1(classToAdd) {
      addClass(this.el_, classToAdd);
    };

    /**
     * Remove a CSS class name from the `Component`s element.
     *
     * @param {string} classToRemove
     *        CSS class name to remove
     */


    Component.prototype.removeClass = function removeClass$$1(classToRemove) {
      removeClass(this.el_, classToRemove);
    };

    /**
     * Add or remove a CSS class name from the component's element.
     * - `classToToggle` gets added when {@link Component#hasClass} would return false.
     * - `classToToggle` gets removed when {@link Component#hasClass} would return true.
     *
     * @param  {string} classToToggle
     *         The class to add or remove based on (@link Component#hasClass}
     *
     * @param  {boolean|Dom~predicate} [predicate]
     *         An {@link Dom~predicate} function or a boolean
     */


    Component.prototype.toggleClass = function toggleClass$$1(classToToggle, predicate) {
      toggleClass(this.el_, classToToggle, predicate);
    };

    /**
     * Show the `Component`s element if it is hidden by removing the
     * 'vjs-hidden' class name from it.
     */


    Component.prototype.show = function show() {
      this.removeClass('vjs-hidden');
    };

    /**
     * Hide the `Component`s element if it is currently showing by adding the
     * 'vjs-hidden` class name to it.
     */


    Component.prototype.hide = function hide() {
      this.addClass('vjs-hidden');
    };

    /**
     * Lock a `Component`s element in its visible state by adding the 'vjs-lock-showing'
     * class name to it. Used during fadeIn/fadeOut.
     *
     * @private
     */


    Component.prototype.lockShowing = function lockShowing() {
      this.addClass('vjs-lock-showing');
    };

    /**
     * Unlock a `Component`s element from its visible state by removing the 'vjs-lock-showing'
     * class name from it. Used during fadeIn/fadeOut.
     *
     * @private
     */


    Component.prototype.unlockShowing = function unlockShowing() {
      this.removeClass('vjs-lock-showing');
    };

    /**
     * Get the value of an attribute on the `Component`s element.
     *
     * @param {string} attribute
     *        Name of the attribute to get the value from.
     *
     * @return {string|null}
     *         - The value of the attribute that was asked for.
     *         - Can be an empty string on some browsers if the attribute does not exist
     *           or has no value
     *         - Most browsers will return null if the attibute does not exist or has
     *           no value.
     *
     * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttribute}
     */


    Component.prototype.getAttribute = function getAttribute$$1(attribute) {
      return getAttribute(this.el_, attribute);
    };

    /**
     * Set the value of an attribute on the `Component`'s element
     *
     * @param {string} attribute
     *        Name of the attribute to set.
     *
     * @param {string} value
     *        Value to set the attribute to.
     *
     * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttribute}
     */


    Component.prototype.setAttribute = function setAttribute$$1(attribute, value) {
      setAttribute(this.el_, attribute, value);
    };

    /**
     * Remove an attribute from the `Component`s element.
     *
     * @param {string} attribute
     *        Name of the attribute to remove.
     *
     * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/removeAttribute}
     */


    Component.prototype.removeAttribute = function removeAttribute$$1(attribute) {
      removeAttribute(this.el_, attribute);
    };

    /**
     * Get or set the width of the component based upon the CSS styles.
     * See {@link Component#dimension} for more detailed information.
     *
     * @param {number|string} [num]
     *        The width that you want to set postfixed with '%', 'px' or nothing.
     *
     * @param {boolean} [skipListeners]
     *        Skip the componentresize event trigger
     *
     * @return {number|string}
     *         The width when getting, zero if there is no width. Can be a string
     *           postpixed with '%' or 'px'.
     */


    Component.prototype.width = function width(num, skipListeners) {
      return this.dimension('width', num, skipListeners);
    };

    /**
     * Get or set the height of the component based upon the CSS styles.
     * See {@link Component#dimension} for more detailed information.
     *
     * @param {number|string} [num]
     *        The height that you want to set postfixed with '%', 'px' or nothing.
     *
     * @param {boolean} [skipListeners]
     *        Skip the componentresize event trigger
     *
     * @return {number|string}
     *         The width when getting, zero if there is no width. Can be a string
     *         postpixed with '%' or 'px'.
     */


    Component.prototype.height = function height(num, skipListeners) {
      return this.dimension('height', num, skipListeners);
    };

    /**
     * Set both the width and height of the `Component` element at the same time.
     *
     * @param  {number|string} width
     *         Width to set the `Component`s element to.
     *
     * @param  {number|string} height
     *         Height to set the `Component`s element to.
     */


    Component.prototype.dimensions = function dimensions(width, height) {
      // Skip componentresize listeners on width for optimization
      this.width(width, true);
      this.height(height);
    };

    /**
     * Get or set width or height of the `Component` element. This is the shared code
     * for the {@link Component#width} and {@link Component#height}.
     *
     * Things to know:
     * - If the width or height in an number this will return the number postfixed with 'px'.
     * - If the width/height is a percent this will return the percent postfixed with '%'
     * - Hidden elements have a width of 0 with `window.getComputedStyle`. This function
     *   defaults to the `Component`s `style.width` and falls back to `window.getComputedStyle`.
     *   See [this]{@link http://www.foliotek.com/devblog/getting-the-width-of-a-hidden-element-with-jquery-using-width/}
     *   for more information
     * - If you want the computed style of the component, use {@link Component#currentWidth}
     *   and {@link {Component#currentHeight}
     *
     * @fires Component#componentresize
     *
     * @param {string} widthOrHeight
     8        'width' or 'height'
     *
     * @param  {number|string} [num]
     8         New dimension
     *
     * @param  {boolean} [skipListeners]
     *         Skip componentresize event trigger
     *
     * @return {number}
     *         The dimension when getting or 0 if unset
     */


    Component.prototype.dimension = function dimension(widthOrHeight, num, skipListeners) {
      if (num !== undefined) {
        // Set to zero if null or literally NaN (NaN !== NaN)
        if (num === null || num !== num) {
          num = 0;
        }

        // Check if using css width/height (% or px) and adjust
        if (('' + num).indexOf('%') !== -1 || ('' + num).indexOf('px') !== -1) {
          this.el_.style[widthOrHeight] = num;
        } else if (num === 'auto') {
          this.el_.style[widthOrHeight] = '';
        } else {
          this.el_.style[widthOrHeight] = num + 'px';
        }

        // skipListeners allows us to avoid triggering the resize event when setting both width and height
        if (!skipListeners) {
          /**
           * Triggered when a component is resized.
           *
           * @event Component#componentresize
           * @type {EventTarget~Event}
           */
          this.trigger('componentresize');
        }

        return;
      }

      // Not setting a value, so getting it
      // Make sure element exists
      if (!this.el_) {
        return 0;
      }

      // Get dimension value from style
      var val = this.el_.style[widthOrHeight];
      var pxIndex = val.indexOf('px');

      if (pxIndex !== -1) {
        // Return the pixel value with no 'px'
        return parseInt(val.slice(0, pxIndex), 10);
      }

      // No px so using % or no style was set, so falling back to offsetWidth/height
      // If component has display:none, offset will return 0
      // TODO: handle display:none and no dimension style using px
      return parseInt(this.el_['offset' + toTitleCase(widthOrHeight)], 10);
    };

    /**
     * Get the width or the height of the `Component` elements computed style. Uses
     * `window.getComputedStyle`.
     *
     * @param {string} widthOrHeight
     *        A string containing 'width' or 'height'. Whichever one you want to get.
     *
     * @return {number}
     *         The dimension that gets asked for or 0 if nothing was set
     *         for that dimension.
     */


    Component.prototype.currentDimension = function currentDimension(widthOrHeight) {
      var computedWidthOrHeight = 0;

      if (widthOrHeight !== 'width' && widthOrHeight !== 'height') {
        throw new Error('currentDimension only accepts width or height value');
      }

      if (typeof window_1.getComputedStyle === 'function') {
        var computedStyle = window_1.getComputedStyle(this.el_);

        computedWidthOrHeight = computedStyle.getPropertyValue(widthOrHeight) || computedStyle[widthOrHeight];
      }

      // remove 'px' from variable and parse as integer
      computedWidthOrHeight = parseFloat(computedWidthOrHeight);

      // if the computed value is still 0, it's possible that the browser is lying
      // and we want to check the offset values.
      // This code also runs wherever getComputedStyle doesn't exist.
      if (computedWidthOrHeight === 0) {
        var rule = 'offset' + toTitleCase(widthOrHeight);

        computedWidthOrHeight = this.el_[rule];
      }

      return computedWidthOrHeight;
    };

    /**
     * An object that contains width and height values of the `Component`s
     * computed style. Uses `window.getComputedStyle`.
     *
     * @typedef {Object} Component~DimensionObject
     *
     * @property {number} width
     *           The width of the `Component`s computed style.
     *
     * @property {number} height
     *           The height of the `Component`s computed style.
     */

    /**
     * Get an object that contains width and height values of the `Component`s
     * computed style.
     *
     * @return {Component~DimensionObject}
     *         The dimensions of the components element
     */


    Component.prototype.currentDimensions = function currentDimensions() {
      return {
        width: this.currentDimension('width'),
        height: this.currentDimension('height')
      };
    };

    /**
     * Get the width of the `Component`s computed style. Uses `window.getComputedStyle`.
     *
     * @return {number} width
     *           The width of the `Component`s computed style.
     */


    Component.prototype.currentWidth = function currentWidth() {
      return this.currentDimension('width');
    };

    /**
     * Get the height of the `Component`s computed style. Uses `window.getComputedStyle`.
     *
     * @return {number} height
     *           The height of the `Component`s computed style.
     */


    Component.prototype.currentHeight = function currentHeight() {
      return this.currentDimension('height');
    };

    /**
     * Set the focus to this component
     */


    Component.prototype.focus = function focus() {
      this.el_.focus();
    };

    /**
     * Remove the focus from this component
     */


    Component.prototype.blur = function blur() {
      this.el_.blur();
    };

    /**
     * Emit a 'tap' events when touch event support gets detected. This gets used to
     * support toggling the controls through a tap on the video. They get enabled
     * because every sub-component would have extra overhead otherwise.
     *
     * @private
     * @fires Component#tap
     * @listens Component#touchstart
     * @listens Component#touchmove
     * @listens Component#touchleave
     * @listens Component#touchcancel
     * @listens Component#touchend
     */


    Component.prototype.emitTapEvents = function emitTapEvents() {
      // Track the start time so we can determine how long the touch lasted
      var touchStart = 0;
      var firstTouch = null;

      // Maximum movement allowed during a touch event to still be considered a tap
      // Other popular libs use anywhere from 2 (hammer.js) to 15,
      // so 10 seems like a nice, round number.
      var tapMovementThreshold = 10;

      // The maximum length a touch can be while still being considered a tap
      var touchTimeThreshold = 200;

      var couldBeTap = void 0;

      this.on('touchstart', function (event) {
        // If more than one finger, don't consider treating this as a click
        if (event.touches.length === 1) {
          // Copy pageX/pageY from the object
          firstTouch = {
            pageX: event.touches[0].pageX,
            pageY: event.touches[0].pageY
          };
          // Record start time so we can detect a tap vs. "touch and hold"
          touchStart = new Date().getTime();
          // Reset couldBeTap tracking
          couldBeTap = true;
        }
      });

      this.on('touchmove', function (event) {
        // If more than one finger, don't consider treating this as a click
        if (event.touches.length > 1) {
          couldBeTap = false;
        } else if (firstTouch) {
          // Some devices will throw touchmoves for all but the slightest of taps.
          // So, if we moved only a small distance, this could still be a tap
          var xdiff = event.touches[0].pageX - firstTouch.pageX;
          var ydiff = event.touches[0].pageY - firstTouch.pageY;
          var touchDistance = Math.sqrt(xdiff * xdiff + ydiff * ydiff);

          if (touchDistance > tapMovementThreshold) {
            couldBeTap = false;
          }
        }
      });

      var noTap = function noTap() {
        couldBeTap = false;
      };

      // TODO: Listen to the original target. http://youtu.be/DujfpXOKUp8?t=13m8s
      this.on('touchleave', noTap);
      this.on('touchcancel', noTap);

      // When the touch ends, measure how long it took and trigger the appropriate
      // event
      this.on('touchend', function (event) {
        firstTouch = null;
        // Proceed only if the touchmove/leave/cancel event didn't happen
        if (couldBeTap === true) {
          // Measure how long the touch lasted
          var touchTime = new Date().getTime() - touchStart;

          // Make sure the touch was less than the threshold to be considered a tap
          if (touchTime < touchTimeThreshold) {
            // Don't let browser turn this into a click
            event.preventDefault();
            /**
             * Triggered when a `Component` is tapped.
             *
             * @event Component#tap
             * @type {EventTarget~Event}
             */
            this.trigger('tap');
            // It may be good to copy the touchend event object and change the
            // type to tap, if the other event properties aren't exact after
            // Events.fixEvent runs (e.g. event.target)
          }
        }
      });
    };

    /**
     * This function reports user activity whenever touch events happen. This can get
     * turned off by any sub-components that wants touch events to act another way.
     *
     * Report user touch activity when touch events occur. User activity gets used to
     * determine when controls should show/hide. It is simple when it comes to mouse
     * events, because any mouse event should show the controls. So we capture mouse
     * events that bubble up to the player and report activity when that happens.
     * With touch events it isn't as easy as `touchstart` and `touchend` toggle player
     * controls. So touch events can't help us at the player level either.
     *
     * User activity gets checked asynchronously. So what could happen is a tap event
     * on the video turns the controls off. Then the `touchend` event bubbles up to
     * the player. Which, if it reported user activity, would turn the controls right
     * back on. We also don't want to completely block touch events from bubbling up.
     * Furthermore a `touchmove` event and anything other than a tap, should not turn
     * controls back on.
     *
     * @listens Component#touchstart
     * @listens Component#touchmove
     * @listens Component#touchend
     * @listens Component#touchcancel
     */


    Component.prototype.enableTouchActivity = function enableTouchActivity() {
      // Don't continue if the root player doesn't support reporting user activity
      if (!this.player() || !this.player().reportUserActivity) {
        return;
      }

      // listener for reporting that the user is active
      var report = bind(this.player(), this.player().reportUserActivity);

      var touchHolding = void 0;

      this.on('touchstart', function () {
        report();
        // For as long as the they are touching the device or have their mouse down,
        // we consider them active even if they're not moving their finger or mouse.
        // So we want to continue to update that they are active
        this.clearInterval(touchHolding);
        // report at the same interval as activityCheck
        touchHolding = this.setInterval(report, 250);
      });

      var touchEnd = function touchEnd(event) {
        report();
        // stop the interval that maintains activity if the touch is holding
        this.clearInterval(touchHolding);
      };

      this.on('touchmove', report);
      this.on('touchend', touchEnd);
      this.on('touchcancel', touchEnd);
    };

    /**
     * A callback that has no parameters and is bound into `Component`s context.
     *
     * @callback Component~GenericCallback
     * @this Component
     */

    /**
     * Creates a function that runs after an `x` millisecond timeout. This function is a
     * wrapper around `window.setTimeout`. There are a few reasons to use this one
     * instead though:
     * 1. It gets cleared via  {@link Component#clearTimeout} when
     *    {@link Component#dispose} gets called.
     * 2. The function callback will gets turned into a {@link Component~GenericCallback}
     *
     * > Note: You can use `window.clearTimeout` on the id returned by this function. This
     *         will cause its dispose listener not to get cleaned up! Please use
     *         {@link Component#clearTimeout} or {@link Component#dispose}.
     *
     * @param {Component~GenericCallback} fn
     *        The function that will be run after `timeout`.
     *
     * @param {number} timeout
     *        Timeout in milliseconds to delay before executing the specified function.
     *
     * @return {number}
     *         Returns a timeout ID that gets used to identify the timeout. It can also
     *         get used in {@link Component#clearTimeout} to clear the timeout that
     *         was set.
     *
     * @listens Component#dispose
     * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout}
     */


    Component.prototype.setTimeout = function setTimeout(fn, timeout) {
      var _this2 = this;

      fn = bind(this, fn);

      var timeoutId = window_1.setTimeout(fn, timeout);
      var disposeFn = function disposeFn() {
        return _this2.clearTimeout(timeoutId);
      };

      disposeFn.guid = 'vjs-timeout-' + timeoutId;

      this.on('dispose', disposeFn);

      return timeoutId;
    };

    /**
     * Clears a timeout that gets created via `window.setTimeout` or
     * {@link Component#setTimeout}. If you set a timeout via {@link Component#setTimeout}
     * use this function instead of `window.clearTimout`. If you don't your dispose
     * listener will not get cleaned up until {@link Component#dispose}!
     *
     * @param {number} timeoutId
     *        The id of the timeout to clear. The return value of
     *        {@link Component#setTimeout} or `window.setTimeout`.
     *
     * @return {number}
     *         Returns the timeout id that was cleared.
     *
     * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearTimeout}
     */


    Component.prototype.clearTimeout = function clearTimeout(timeoutId) {
      window_1.clearTimeout(timeoutId);

      var disposeFn = function disposeFn() {
      };

      disposeFn.guid = 'vjs-timeout-' + timeoutId;

      this.off('dispose', disposeFn);

      return timeoutId;
    };

    /**
     * Creates a function that gets run every `x` milliseconds. This function is a wrapper
     * around `window.setInterval`. There are a few reasons to use this one instead though.
     * 1. It gets cleared via  {@link Component#clearInterval} when
     *    {@link Component#dispose} gets called.
     * 2. The function callback will be a {@link Component~GenericCallback}
     *
     * @param {Component~GenericCallback} fn
     *        The function to run every `x` seconds.
     *
     * @param {number} interval
     *        Execute the specified function every `x` milliseconds.
     *
     * @return {number}
     *         Returns an id that can be used to identify the interval. It can also be be used in
     *         {@link Component#clearInterval} to clear the interval.
     *
     * @listens Component#dispose
     * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setInterval}
     */


    Component.prototype.setInterval = function setInterval(fn, interval) {
      var _this3 = this;

      fn = bind(this, fn);

      var intervalId = window_1.setInterval(fn, interval);

      var disposeFn = function disposeFn() {
        return _this3.clearInterval(intervalId);
      };

      disposeFn.guid = 'vjs-interval-' + intervalId;

      this.on('dispose', disposeFn);

      return intervalId;
    };

    /**
     * Clears an interval that gets created via `window.setInterval` or
     * {@link Component#setInterval}. If you set an inteval via {@link Component#setInterval}
     * use this function instead of `window.clearInterval`. If you don't your dispose
     * listener will not get cleaned up until {@link Component#dispose}!
     *
     * @param {number} intervalId
     *        The id of the interval to clear. The return value of
     *        {@link Component#setInterval} or `window.setInterval`.
     *
     * @return {number}
     *         Returns the interval id that was cleared.
     *
     * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearInterval}
     */


    Component.prototype.clearInterval = function clearInterval(intervalId) {
      window_1.clearInterval(intervalId);

      var disposeFn = function disposeFn() {
      };

      disposeFn.guid = 'vjs-interval-' + intervalId;

      this.off('dispose', disposeFn);

      return intervalId;
    };

    /**
     * Queues up a callback to be passed to requestAnimationFrame (rAF), but
     * with a few extra bonuses:
     *
     * - Supports browsers that do not support rAF by falling back to
     *   {@link Component#setTimeout}.
     *
     * - The callback is turned into a {@link Component~GenericCallback} (i.e.
     *   bound to the component).
     *
     * - Automatic cancellation of the rAF callback is handled if the component
     *   is disposed before it is called.
     *
     * @param  {Component~GenericCallback} fn
     *         A function that will be bound to this component and executed just
     *         before the browser's next repaint.
     *
     * @return {number}
     *         Returns an rAF ID that gets used to identify the timeout. It can
     *         also be used in {@link Component#cancelAnimationFrame} to cancel
     *         the animation frame callback.
     *
     * @listens Component#dispose
     * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/requestAnimationFrame}
     */


    Component.prototype.requestAnimationFrame = function requestAnimationFrame(fn) {
      var _this4 = this;

      if (this.supportsRaf_) {
        fn = bind(this, fn);

        var id = window_1.requestAnimationFrame(fn);
        var disposeFn = function disposeFn() {
          return _this4.cancelAnimationFrame(id);
        };

        disposeFn.guid = 'vjs-raf-' + id;
        this.on('dispose', disposeFn);

        return id;
      }

      // Fall back to using a timer.
      return this.setTimeout(fn, 1000 / 60);
    };

    /**
     * Cancels a queued callback passed to {@link Component#requestAnimationFrame}
     * (rAF).
     *
     * If you queue an rAF callback via {@link Component#requestAnimationFrame},
     * use this function instead of `window.cancelAnimationFrame`. If you don't,
     * your dispose listener will not get cleaned up until {@link Component#dispose}!
     *
     * @param {number} id
     *        The rAF ID to clear. The return value of {@link Component#requestAnimationFrame}.
     *
     * @return {number}
     *         Returns the rAF ID that was cleared.
     *
     * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/cancelAnimationFrame}
     */


    Component.prototype.cancelAnimationFrame = function cancelAnimationFrame(id) {
      if (this.supportsRaf_) {
        window_1.cancelAnimationFrame(id);

        var disposeFn = function disposeFn() {
        };

        disposeFn.guid = 'vjs-raf-' + id;

        this.off('dispose', disposeFn);

        return id;
      }

      // Fall back to using a timer.
      return this.clearTimeout(id);
    };

    /**
     * Register a `Component` with `videojs` given the name and the component.
     *
     * > NOTE: {@link Tech}s should not be registered as a `Component`. {@link Tech}s
     *         should be registered using {@link Tech.registerTech} or
     *         {@link videojs:videojs.registerTech}.
     *
     * > NOTE: This function can also be seen on videojs as
     *         {@link videojs:videojs.registerComponent}.
     *
     * @param {string} name
     *        The name of the `Component` to register.
     *
     * @param {Component} ComponentToRegister
     *        The `Component` class to register.
     *
     * @return {Component}
     *         The `Component` that was registered.
     */


    Component.registerComponent = function registerComponent(name, ComponentToRegister) {
      if (typeof name !== 'string' || !name) {
        throw new Error('Illegal component name, "' + name + '"; must be a non-empty string.');
      }

      var Tech = Component.getComponent('Tech');

      // We need to make sure this check is only done if Tech has been registered.
      var isTech = Tech && Tech.isTech(ComponentToRegister);
      var isComp = Component === ComponentToRegister || Component.prototype.isPrototypeOf(ComponentToRegister.prototype);

      if (isTech || !isComp) {
        var reason = void 0;

        if (isTech) {
          reason = 'techs must be registered using Tech.registerTech()';
        } else {
          reason = 'must be a Component subclass';
        }

        throw new Error('Illegal component, "' + name + '"; ' + reason + '.');
      }

      name = toTitleCase(name);

      if (!Component.components_) {
        Component.components_ = {};
      }

      var Player = Component.getComponent('Player');

      if (name === 'Player' && Player && Player.players) {
        var players = Player.players;
        var playerNames = Object.keys(players);

        // If we have players that were disposed, then their name will still be
        // in Players.players. So, we must loop through and verify that the value
        // for each item is not null. This allows registration of the Player component
        // after all players have been disposed or before any were created.
        if (players && playerNames.length > 0 && playerNames.map(function (pname) {
          return players[pname];
        }).every(Boolean)) {
          throw new Error('Can not register Player component after player has been created.');
        }
      }

      Component.components_[name] = ComponentToRegister;

      return ComponentToRegister;
    };

    /**
     * Get a `Component` based on the name it was registered with.
     *
     * @param {string} name
     *        The Name of the component to get.
     *
     * @return {Component}
     *         The `Component` that got registered under the given name.
     *
     * @deprecated In `videojs` 6 this will not return `Component`s that were not
     *             registered using {@link Component.registerComponent}. Currently we
     *             check the global `videojs` object for a `Component` name and
     *             return that if it exists.
     */


    Component.getComponent = function getComponent(name) {
      if (!name) {
        return;
      }

      name = toTitleCase(name);

      if (Component.components_ && Component.components_[name]) {
        return Component.components_[name];
      }
    };

    return Component;
  }();

  /**
   * Whether or not this component supports `requestAnimationFrame`.
   *
   * This is exposed primarily for testing purposes.
   *
   * @private
   * @type {Boolean}
   */


  Component.prototype.supportsRaf_ = typeof window_1.requestAnimationFrame === 'function' && typeof window_1.cancelAnimationFrame === 'function';

  Component.registerComponent('Component', Component);

  /**
   * @file browser.js
   * @module browser
   */

  var USER_AGENT = window_1.navigator && window_1.navigator.userAgent || '';
  var webkitVersionMap = /AppleWebKit\/([\d.]+)/i.exec(USER_AGENT);
  var appleWebkitVersion = webkitVersionMap ? parseFloat(webkitVersionMap.pop()) : null;

  /*
   * Device is an iPhone
   *
   * @type {Boolean}
   * @constant
   * @private
   */
  var IS_IPAD = /iPad/i.test(USER_AGENT);

  // The Facebook app's UIWebView identifies as both an iPhone and iPad, so
  // to identify iPhones, we need to exclude iPads.
  // http://artsy.github.io/blog/2012/10/18/the-perils-of-ios-user-agent-sniffing/
  var IS_IPHONE = /iPhone/i.test(USER_AGENT) && !IS_IPAD;
  var IS_IPOD = /iPod/i.test(USER_AGENT);
  var IS_IOS = IS_IPHONE || IS_IPAD || IS_IPOD;

  var IOS_VERSION = function () {
    var match = USER_AGENT.match(/OS (\d+)_/i);

    if (match && match[1]) {
      return match[1];
    }
    return null;
  }();

  var IS_ANDROID = /Android/i.test(USER_AGENT);
  var ANDROID_VERSION = function () {
    // This matches Android Major.Minor.Patch versions
    // ANDROID_VERSION is Major.Minor as a Number, if Minor isn't available, then only Major is returned
    var match = USER_AGENT.match(/Android (\d+)(?:\.(\d+))?(?:\.(\d+))*/i);

    if (!match) {
      return null;
    }

    var major = match[1] && parseFloat(match[1]);
    var minor = match[2] && parseFloat(match[2]);

    if (major && minor) {
      return parseFloat(match[1] + '.' + match[2]);
    } else if (major) {
      return major;
    }
    return null;
  }();

  var IS_NATIVE_ANDROID = IS_ANDROID && ANDROID_VERSION < 5 && appleWebkitVersion < 537;

  var IS_FIREFOX = /Firefox/i.test(USER_AGENT);
  var IS_EDGE = /Edge/i.test(USER_AGENT);
  var IS_CHROME = !IS_EDGE && /Chrome/i.test(USER_AGENT);
  var CHROME_VERSION = function () {
    var match = USER_AGENT.match(/Chrome\/(\d+)/);

    if (match && match[1]) {
      return parseFloat(match[1]);
    }
    return null;
  }();
  var IE_VERSION = function () {
    var result = /MSIE\s(\d+)\.\d/.exec(USER_AGENT);
    var version = result && parseFloat(result[1]);

    if (!version && /Trident\/7.0/i.test(USER_AGENT) && /rv:11.0/.test(USER_AGENT)) {
      // IE 11 has a different user agent string than other IE versions
      version = 11.0;
    }

    return version;
  }();

  var IS_SAFARI = /Safari/i.test(USER_AGENT) && !IS_CHROME && !IS_ANDROID && !IS_EDGE;
  var IS_ANY_SAFARI = IS_SAFARI || IS_IOS;

  var TOUCH_ENABLED = isReal() && ('ontouchstart' in window_1 || window_1.DocumentTouch && window_1.document instanceof window_1.DocumentTouch);

  var browser = /*#__PURE__*/Object.freeze({
    IS_IPAD: IS_IPAD,
    IS_IPHONE: IS_IPHONE,
    IS_IPOD: IS_IPOD,
    IS_IOS: IS_IOS,
    IOS_VERSION: IOS_VERSION,
    IS_ANDROID: IS_ANDROID,
    ANDROID_VERSION: ANDROID_VERSION,
    IS_NATIVE_ANDROID: IS_NATIVE_ANDROID,
    IS_FIREFOX: IS_FIREFOX,
    IS_EDGE: IS_EDGE,
    IS_CHROME: IS_CHROME,
    CHROME_VERSION: CHROME_VERSION,
    IE_VERSION: IE_VERSION,
    IS_SAFARI: IS_SAFARI,
    IS_ANY_SAFARI: IS_ANY_SAFARI,
    TOUCH_ENABLED: TOUCH_ENABLED
  });

  /**
   * @file time-ranges.js
   * @module time-ranges
   */

  /**
   * Returns the time for the specified index at the start or end
   * of a TimeRange object.
   *
   * @function time-ranges:indexFunction
   *
   * @param {number} [index=0]
   *        The range number to return the time for.
   *
   * @return {number}
   *         The time that offset at the specified index.
   *
   * @depricated index must be set to a value, in the future this will throw an error.
   */

  /**
   * An object that contains ranges of time for various reasons.
   *
   * @typedef {Object} TimeRange
   *
   * @property {number} length
   *           The number of time ranges represented by this Object
   *
   * @property {time-ranges:indexFunction} start
   *           Returns the time offset at which a specified time range begins.
   *
   * @property {time-ranges:indexFunction} end
   *           Returns the time offset at which a specified time range ends.
   *
   * @see https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges
   */

  /**
   * Check if any of the time ranges are over the maximum index.
   *
   * @param {string} fnName
   *        The function name to use for logging
   *
   * @param {number} index
   *        The index to check
   *
   * @param {number} maxIndex
   *        The maximum possible index
   *
   * @throws {Error} if the timeRanges provided are over the maxIndex
   */
  function rangeCheck(fnName, index, maxIndex) {
    if (typeof index !== 'number' || index < 0 || index > maxIndex) {
      throw new Error('Failed to execute \'' + fnName + '\' on \'TimeRanges\': The index provided (' + index + ') is non-numeric or out of bounds (0-' + maxIndex + ').');
    }
  }

  /**
   * Get the time for the specified index at the start or end
   * of a TimeRange object.
   *
   * @param {string} fnName
   *        The function name to use for logging
   *
   * @param {string} valueIndex
   *        The property that should be used to get the time. should be 'start' or 'end'
   *
   * @param {Array} ranges
   *        An array of time ranges
   *
   * @param {Array} [rangeIndex=0]
   *        The index to start the search at
   *
   * @return {number}
   *         The time that offset at the specified index.
   *
   *
   * @depricated rangeIndex must be set to a value, in the future this will throw an error.
   * @throws {Error} if rangeIndex is more than the length of ranges
   */
  function getRange(fnName, valueIndex, ranges, rangeIndex) {
    rangeCheck(fnName, rangeIndex, ranges.length - 1);
    return ranges[rangeIndex][valueIndex];
  }

  /**
   * Create a time range object given ranges of time.
   *
   * @param {Array} [ranges]
   *        An array of time ranges.
   */
  function createTimeRangesObj(ranges) {
    if (ranges === undefined || ranges.length === 0) {
      return {
        length: 0,
        start: function start() {
          throw new Error('This TimeRanges object is empty');
        },
        end: function end() {
          throw new Error('This TimeRanges object is empty');
        }
      };
    }
    return {
      length: ranges.length,
      start: getRange.bind(null, 'start', 0, ranges),
      end: getRange.bind(null, 'end', 1, ranges)
    };
  }

  /**
   * Should create a fake `TimeRange` object which mimics an HTML5 time range instance.
   *
   * @param {number|Array} start
   *        The start of a single range or an array of ranges
   *
   * @param {number} end
   *        The end of a single range.
   *
   * @private
   */
  function createTimeRanges(start, end) {
    if (Array.isArray(start)) {
      return createTimeRangesObj(start);
    } else if (start === undefined || end === undefined) {
      return createTimeRangesObj();
    }
    return createTimeRangesObj([[start, end]]);
  }

  /**
   * @file buffer.js
   * @module buffer
   */

  /**
   * Compute the percentage of the media that has been buffered.
   *
   * @param {TimeRange} buffered
   *        The current `TimeRange` object representing buffered time ranges
   *
   * @param {number} duration
   *        Total duration of the media
   *
   * @return {number}
   *         Percent buffered of the total duration in decimal form.
   */
  function bufferedPercent(buffered, duration) {
    var bufferedDuration = 0;
    var start = void 0;
    var end = void 0;

    if (!duration) {
      return 0;
    }

    if (!buffered || !buffered.length) {
      buffered = createTimeRanges(0, 0);
    }

    for (var i = 0; i < buffered.length; i++) {
      start = buffered.start(i);
      end = buffered.end(i);

      // buffered end can be bigger than duration by a very small fraction
      if (end > duration) {
        end = duration;
      }

      bufferedDuration += end - start;
    }

    return bufferedDuration / duration;
  }

  /**
   * @file fullscreen-api.js
   * @module fullscreen-api
   * @private
   */

  /**
   * Store the browser-specific methods for the fullscreen API.
   *
   * @type {Object}
   * @see [Specification]{@link https://fullscreen.spec.whatwg.org}
   * @see [Map Approach From Screenfull.js]{@link https://github.com/sindresorhus/screenfull.js}
   */
  var FullscreenApi = {};

  // browser API methods
  var apiMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror'],
    // WebKit
    ['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror'],
    // Old WebKit (Safari 5.1)
    ['webkitRequestFullScreen', 'webkitCancelFullScreen', 'webkitCurrentFullScreenElement', 'webkitCancelFullScreen', 'webkitfullscreenchange', 'webkitfullscreenerror'],
    // Mozilla
    ['mozRequestFullScreen', 'mozCancelFullScreen', 'mozFullScreenElement', 'mozFullScreenEnabled', 'mozfullscreenchange', 'mozfullscreenerror'],
    // Microsoft
    ['msRequestFullscreen', 'msExitFullscreen', 'msFullscreenElement', 'msFullscreenEnabled', 'MSFullscreenChange', 'MSFullscreenError']];

  var specApi = apiMap[0];
  var browserApi = void 0;

  // determine the supported set of functions
  for (var i = 0; i < apiMap.length; i++) {
    // check for exitFullscreen function
    if (apiMap[i][1] in document_1) {
      browserApi = apiMap[i];
      break;
    }
  }

  // map the browser API names to the spec API names
  if (browserApi) {
    for (var _i = 0; _i < browserApi.length; _i++) {
      FullscreenApi[specApi[_i]] = browserApi[_i];
    }
  }

  /**
   * @file media-error.js
   */

  /**
   * A Custom `MediaError` class which mimics the standard HTML5 `MediaError` class.
   *
   * @param {number|string|Object|MediaError} value
   *        This can be of multiple types:
   *        - number: should be a standard error code
   *        - string: an error message (the code will be 0)
   *        - Object: arbitrary properties
   *        - `MediaError` (native): used to populate a video.js `MediaError` object
   *        - `MediaError` (video.js): will return itself if it's already a
   *          video.js `MediaError` object.
   *
   * @see [MediaError Spec]{@link https://dev.w3.org/html5/spec-author-view/video.html#mediaerror}
   * @see [Encrypted MediaError Spec]{@link https://www.w3.org/TR/2013/WD-encrypted-media-20130510/#error-codes}
   *
   * @class MediaError
   */
  function MediaError(value) {

    // Allow redundant calls to this constructor to avoid having `instanceof`
    // checks peppered around the code.
    if (value instanceof MediaError) {
      return value;
    }

    if (typeof value === 'number') {
      this.code = value;
    } else if (typeof value === 'string') {
      // default code is zero, so this is a custom error
      this.message = value;
    } else if (isObject(value)) {

      // We assign the `code` property manually because native `MediaError` objects
      // do not expose it as an own/enumerable property of the object.
      if (typeof value.code === 'number') {
        this.code = value.code;
      }

      assign(this, value);
    }

    if (!this.message) {
      this.message = MediaError.defaultMessages[this.code] || '';
    }
  }

  /**
   * The error code that refers two one of the defined `MediaError` types
   *
   * @type {Number}
   */
  MediaError.prototype.code = 0;

  /**
   * An optional message that to show with the error. Message is not part of the HTML5
   * video spec but allows for more informative custom errors.
   *
   * @type {String}
   */
  MediaError.prototype.message = '';

  /**
   * An optional status code that can be set by plugins to allow even more detail about
   * the error. For example a plugin might provide a specific HTTP status code and an
   * error message for that code. Then when the plugin gets that error this class will
   * know how to display an error message for it. This allows a custom message to show
   * up on the `Player` error overlay.
   *
   * @type {Array}
   */
  MediaError.prototype.status = null;

  /**
   * Errors indexed by the W3C standard. The order **CANNOT CHANGE**! See the
   * specification listed under {@link MediaError} for more information.
   *
   * @enum {array}
   * @readonly
   * @property {string} 0 - MEDIA_ERR_CUSTOM
   * @property {string} 1 - MEDIA_ERR_CUSTOM
   * @property {string} 2 - MEDIA_ERR_ABORTED
   * @property {string} 3 - MEDIA_ERR_NETWORK
   * @property {string} 4 - MEDIA_ERR_SRC_NOT_SUPPORTED
   * @property {string} 5 - MEDIA_ERR_ENCRYPTED
   */
  MediaError.errorTypes = ['MEDIA_ERR_CUSTOM', 'MEDIA_ERR_ABORTED', 'MEDIA_ERR_NETWORK', 'MEDIA_ERR_DECODE', 'MEDIA_ERR_SRC_NOT_SUPPORTED', 'MEDIA_ERR_ENCRYPTED'];

  /**
   * The default `MediaError` messages based on the {@link MediaError.errorTypes}.
   *
   * @type {Array}
   * @constant
   */
  MediaError.defaultMessages = {
    1: 'You aborted the media playback',
    2: 'A network error caused the media download to fail part-way.',
    3: 'The media playback was aborted due to a corruption problem or because the media used features your browser did not support.',
    4: 'The media could not be loaded, either because the server or network failed or because the format is not supported.',
    5: 'The media is encrypted and we do not have the keys to decrypt it.'
  };

  // Add types as properties on MediaError
  // e.g. MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;
  for (var errNum = 0; errNum < MediaError.errorTypes.length; errNum++) {
    MediaError[MediaError.errorTypes[errNum]] = errNum;
    // values should be accessible on both the class and instance
    MediaError.prototype[MediaError.errorTypes[errNum]] = errNum;
  }

  var tuple = SafeParseTuple;

  function SafeParseTuple(obj, reviver) {
    var json;
    var error = null;

    try {
      json = JSON.parse(obj, reviver);
    } catch (err) {
      error = err;
    }

    return [error, json];
  }

  /**
   * Returns whether an object is `Promise`-like (i.e. has a `then` method).
   *
   * @param  {Object}  value
   *         An object that may or may not be `Promise`-like.
   *
   * @return {Boolean}
   *         Whether or not the object is `Promise`-like.
   */
  function isPromise(value) {
    return value !== undefined && value !== null && typeof value.then === 'function';
  }

  /**
   * Silence a Promise-like object.
   *
   * This is useful for avoiding non-harmful, but potentially confusing "uncaught
   * playOld promise" rejection error messages.
   *
   * @param  {Object} value
   *         An object that may or may not be `Promise`-like.
   */
  function silencePromise(value) {
    if (isPromise(value)) {
      value.then(null, function (e) {
      });
    }
  }

  /**
   * @file text-track-list-converter.js Utilities for capturing text track state and
   * re-creating tracks based on a capture.
   *
   * @module text-track-list-converter
   */

  /**
   * Examine a single {@link TextTrack} and return a JSON-compatible javascript object that
   * represents the {@link TextTrack}'s state.
   *
   * @param {TextTrack} track
   *        The text track to query.
   *
   * @return {Object}
   *         A serializable javascript representation of the TextTrack.
   * @private
   */
  var trackToJson_ = function trackToJson_(track) {
    var ret = ['kind', 'label', 'language', 'id', 'inBandMetadataTrackDispatchType', 'mode', 'src'].reduce(function (acc, prop, i) {

      if (track[prop]) {
        acc[prop] = track[prop];
      }

      return acc;
    }, {
      cues: track.cues && Array.prototype.map.call(track.cues, function (cue) {
        return {
          startTime: cue.startTime,
          endTime: cue.endTime,
          text: cue.text,
          id: cue.id
        };
      })
    });

    return ret;
  };

  /**
   * Examine a {@link Tech} and return a JSON-compatible javascript array that represents the
   * state of all {@link TextTrack}s currently configured. The return array is compatible with
   * {@link text-track-list-converter:jsonToTextTracks}.
   *
   * @param {Tech} tech
   *        The tech object to query
   *
   * @return {Array}
   *         A serializable javascript representation of the {@link Tech}s
   *         {@link TextTrackList}.
   */
  var textTracksToJson = function textTracksToJson(tech) {

    var trackEls = tech.$$('track');

    var trackObjs = Array.prototype.map.call(trackEls, function (t) {
      return t.track;
    });
    var tracks = Array.prototype.map.call(trackEls, function (trackEl) {
      var json = trackToJson_(trackEl.track);

      if (trackEl.src) {
        json.src = trackEl.src;
      }
      return json;
    });

    return tracks.concat(Array.prototype.filter.call(tech.textTracks(), function (track) {
      return trackObjs.indexOf(track) === -1;
    }).map(trackToJson_));
  };

  /**
   * Create a set of remote {@link TextTrack}s on a {@link Tech} based on an array of javascript
   * object {@link TextTrack} representations.
   *
   * @param {Array} json
   *        An array of `TextTrack` representation objects, like those that would be
   *        produced by `textTracksToJson`.
   *
   * @param {Tech} tech
   *        The `Tech` to create the `TextTrack`s on.
   */
  var jsonToTextTracks = function jsonToTextTracks(json, tech) {
    json.forEach(function (track) {
      var addedTrack = tech.addRemoteTextTrack(track).track;

      if (!track.src && track.cues) {
        track.cues.forEach(function (cue) {
          return addedTrack.addCue(cue);
        });
      }
    });

    return tech.textTracks();
  };

  var textTrackConverter = {
    textTracksToJson: textTracksToJson,
    jsonToTextTracks: jsonToTextTracks,
    trackToJson_: trackToJson_
  };

  /**
   * @file modal-dialog.js
   */

  var MODAL_CLASS_NAME = 'vjs-modal-dialog';
  var ESC = 27;

  /**
   * The `ModalDialog` displays over the video and its controls, which blocks
   * interaction with the player until it is closed.
   *
   * Modal dialogs include a "Close" button and will close when that button
   * is activated - or when ESC is pressed anywhere.
   *
   * @extends Component
   */

  var ModalDialog = function (_Component) {
    inherits(ModalDialog, _Component);

    /**
     * Create an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     *
     * @param {Mixed} [options.content=undefined]
     *        Provide customized content for this modal.
     *
     * @param {string} [options.description]
     *        A text description for the modal, primarily for accessibility.
     *
     * @param {boolean} [options.fillAlways=false]
     *        Normally, modals are automatically filled only the first time
     *        they open. This tells the modal to refresh its content
     *        every time it opens.
     *
     * @param {string} [options.label]
     *        A text label for the modal, primarily for accessibility.
     *
     * @param {boolean} [options.temporary=true]
     *        If `true`, the modal can only be opened once; it will be
     *        disposed as soon as it's closed.
     *
     * @param {boolean} [options.uncloseable=false]
     *        If `true`, the user will not be able to close the modal
     *        through the UI in the normal ways. Programmatic closing is
     *        still possible.
     */
    function ModalDialog(player, options) {
      classCallCheck(this, ModalDialog);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      _this.opened_ = _this.hasBeenOpened_ = _this.hasBeenFilled_ = false;

      _this.closeable(!_this.options_.uncloseable);
      _this.content(_this.options_.content);

      // Make sure the contentEl is defined AFTER any children are initialized
      // because we only want the contents of the modal in the contentEl
      // (not the UI elements like the close button).
      _this.contentEl_ = createEl('div', {
        className: MODAL_CLASS_NAME + '-content'
      }, {
        role: 'document'
      });

      _this.descEl_ = createEl('p', {
        className: MODAL_CLASS_NAME + '-description vjs-control-text',
        id: _this.el().getAttribute('aria-describedby')
      });

      textContent(_this.descEl_, _this.description());
      _this.el_.appendChild(_this.descEl_);
      _this.el_.appendChild(_this.contentEl_);
      return _this;
    }

    /**
     * Create the `ModalDialog`'s DOM element
     *
     * @return {Element}
     *         The DOM element that gets created.
     */


    ModalDialog.prototype.createEl = function createEl$$1() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: this.buildCSSClass(),
        tabIndex: -1
      }, {
        'aria-describedby': this.id() + '_description',
        'aria-hidden': 'true',
        'aria-label': this.label(),
        'role': 'dialog'
      });
    };

    ModalDialog.prototype.dispose = function dispose() {
      this.contentEl_ = null;
      this.descEl_ = null;
      this.previouslyActiveEl_ = null;

      _Component.prototype.dispose.call(this);
    };

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    ModalDialog.prototype.buildCSSClass = function buildCSSClass() {
      return MODAL_CLASS_NAME + ' vjs-hidden ' + _Component.prototype.buildCSSClass.call(this);
    };

    /**
     * Handles `keydown` events on the document, looking for ESC, which closes
     * the modal.
     *
     * @param {EventTarget~Event} e
     *        The keypress that triggered this event.
     *
     * @listens keydown
     */


    ModalDialog.prototype.handleKeyPress = function handleKeyPress(e) {
      if (e.which === ESC && this.closeable()) {
        this.close();
      }
    };

    /**
     * Returns the label string for this modal. Primarily used for accessibility.
     *
     * @return {string}
     *         the localized or raw label of this modal.
     */


    ModalDialog.prototype.label = function label() {
      return this.localize(this.options_.label || 'Modal Window');
    };

    /**
     * Returns the description string for this modal. Primarily used for
     * accessibility.
     *
     * @return {string}
     *         The localized or raw description of this modal.
     */


    ModalDialog.prototype.description = function description() {
      var desc = this.options_.description || this.localize('This is a modal window.');

      // Append a universal closeability message if the modal is closeable.
      if (this.closeable()) {
        desc += ' ' + this.localize('This modal can be closed by pressing the Escape key or activating the close button.');
      }

      return desc;
    };

    /**
     * Opens the modal.
     *
     * @fires ModalDialog#beforemodalopen
     * @fires ModalDialog#modalopen
     */


    ModalDialog.prototype.open = function open() {
      if (!this.opened_) {
        var player = this.player();

        /**
         * Fired just before a `ModalDialog` is opened.
         *
         * @event ModalDialog#beforemodalopen
         * @type {EventTarget~Event}
         */
        this.trigger('beforemodalopen');
        this.opened_ = true;

        // Fill content if the modal has never opened before and
        // never been filled.
        if (this.options_.fillAlways || !this.hasBeenOpened_ && !this.hasBeenFilled_) {
          this.fill();
        }

        // If the player was playing, pause it and take note of its previously
        // playing state.
        this.wasPlaying_ = !player.paused();

        if (this.options_.pauseOnOpen && this.wasPlaying_) {
          player.pause();
        }

        if (this.closeable()) {
          this.on(this.el_.ownerDocument, 'keydown', bind(this, this.handleKeyPress));
        }

        // Hide controls and note if they were enabled.
        this.hadControls_ = player.controls();
        player.controls(false);

        this.show();
        this.conditionalFocus_();
        this.el().setAttribute('aria-hidden', 'false');

        /**
         * Fired just after a `ModalDialog` is opened.
         *
         * @event ModalDialog#modalopen
         * @type {EventTarget~Event}
         */
        this.trigger('modalopen');
        this.hasBeenOpened_ = true;
      }
    };

    /**
     * If the `ModalDialog` is currently open or closed.
     *
     * @param  {boolean} [value]
     *         If given, it will open (`true`) or close (`false`) the modal.
     *
     * @return {boolean}
     *         the current open state of the modaldialog
     */


    ModalDialog.prototype.opened = function opened(value) {
      if (typeof value === 'boolean') {
        this[value ? 'open' : 'close']();
      }
      return this.opened_;
    };

    /**
     * Closes the modal, does nothing if the `ModalDialog` is
     * not open.
     *
     * @fires ModalDialog#beforemodalclose
     * @fires ModalDialog#modalclose
     */


    ModalDialog.prototype.close = function close() {
      if (!this.opened_) {
        return;
      }
      var player = this.player();

      /**
       * Fired just before a `ModalDialog` is closed.
       *
       * @event ModalDialog#beforemodalclose
       * @type {EventTarget~Event}
       */
      this.trigger('beforemodalclose');
      this.opened_ = false;

      if (this.wasPlaying_ && this.options_.pauseOnOpen) {
        player.play();
      }

      if (this.closeable()) {
        this.off(this.el_.ownerDocument, 'keydown', bind(this, this.handleKeyPress));
      }

      if (this.hadControls_) {
        player.controls(true);
      }

      this.hide();
      this.el().setAttribute('aria-hidden', 'true');

      /**
       * Fired just after a `ModalDialog` is closed.
       *
       * @event ModalDialog#modalclose
       * @type {EventTarget~Event}
       */
      this.trigger('modalclose');
      this.conditionalBlur_();

      if (this.options_.temporary) {
        this.dispose();
      }
    };

    /**
     * Check to see if the `ModalDialog` is closeable via the UI.
     *
     * @param  {boolean} [value]
     *         If given as a boolean, it will set the `closeable` option.
     *
     * @return {boolean}
     *         Returns the final value of the closable option.
     */


    ModalDialog.prototype.closeable = function closeable(value) {
      if (typeof value === 'boolean') {
        var closeable = this.closeable_ = !!value;
        var close = this.getChild('closeButton');

        // If this is being made closeable and has no close button, add one.
        if (closeable && !close) {

          // The close button should be a child of the modal - not its
          // content element, so temporarily change the content element.
          var temp = this.contentEl_;

          this.contentEl_ = this.el_;
          close = this.addChild('closeButton', {controlText: 'Close Modal Dialog'});
          this.contentEl_ = temp;
          this.on(close, 'close', this.close);
        }

        // If this is being made uncloseable and has a close button, remove it.
        if (!closeable && close) {
          this.off(close, 'close', this.close);
          this.removeChild(close);
          close.dispose();
        }
      }
      return this.closeable_;
    };

    /**
     * Fill the modal's content element with the modal's "content" option.
     * The content element will be emptied before this change takes place.
     */


    ModalDialog.prototype.fill = function fill() {
      this.fillWith(this.content());
    };

    /**
     * Fill the modal's content element with arbitrary content.
     * The content element will be emptied before this change takes place.
     *
     * @fires ModalDialog#beforemodalfill
     * @fires ModalDialog#modalfill
     *
     * @param {Mixed} [content]
     *        The same rules apply to this as apply to the `content` option.
     */


    ModalDialog.prototype.fillWith = function fillWith(content) {
      var contentEl = this.contentEl();
      var parentEl = contentEl.parentNode;
      var nextSiblingEl = contentEl.nextSibling;

      /**
       * Fired just before a `ModalDialog` is filled with content.
       *
       * @event ModalDialog#beforemodalfill
       * @type {EventTarget~Event}
       */
      this.trigger('beforemodalfill');
      this.hasBeenFilled_ = true;

      // Detach the content element from the DOM before performing
      // manipulation to avoid modifying the live DOM multiple times.
      parentEl.removeChild(contentEl);
      this.empty();
      insertContent(contentEl, content);
      /**
       * Fired just after a `ModalDialog` is filled with content.
       *
       * @event ModalDialog#modalfill
       * @type {EventTarget~Event}
       */
      this.trigger('modalfill');

      // Re-inject the re-filled content element.
      if (nextSiblingEl) {
        parentEl.insertBefore(contentEl, nextSiblingEl);
      } else {
        parentEl.appendChild(contentEl);
      }

      // make sure that the close button is last in the dialog DOM
      var closeButton = this.getChild('closeButton');

      if (closeButton) {
        parentEl.appendChild(closeButton.el_);
      }
    };

    /**
     * Empties the content element. This happens anytime the modal is filled.
     *
     * @fires ModalDialog#beforemodalempty
     * @fires ModalDialog#modalempty
     */


    ModalDialog.prototype.empty = function empty() {
      /**
       * Fired just before a `ModalDialog` is emptied.
       *
       * @event ModalDialog#beforemodalempty
       * @type {EventTarget~Event}
       */
      this.trigger('beforemodalempty');
      emptyEl(this.contentEl());

      /**
       * Fired just after a `ModalDialog` is emptied.
       *
       * @event ModalDialog#modalempty
       * @type {EventTarget~Event}
       */
      this.trigger('modalempty');
    };

    /**
     * Gets or sets the modal content, which gets normalized before being
     * rendered into the DOM.
     *
     * This does not update the DOM or fill the modal, but it is called during
     * that process.
     *
     * @param  {Mixed} [value]
     *         If defined, sets the internal content value to be used on the
     *         next call(s) to `fill`. This value is normalized before being
     *         inserted. To "clear" the internal content value, pass `null`.
     *
     * @return {Mixed}
     *         The current content of the modal dialog
     */


    ModalDialog.prototype.content = function content(value) {
      if (typeof value !== 'undefined') {
        this.content_ = value;
      }
      return this.content_;
    };

    /**
     * conditionally focus the modal dialog if focus was previously on the player.
     *
     * @private
     */


    ModalDialog.prototype.conditionalFocus_ = function conditionalFocus_() {
      var activeEl = document_1.activeElement;
      var playerEl = this.player_.el_;

      this.previouslyActiveEl_ = null;

      if (playerEl.contains(activeEl) || playerEl === activeEl) {
        this.previouslyActiveEl_ = activeEl;

        this.focus();

        this.on(document_1, 'keydown', this.handleKeyDown);
      }
    };

    /**
     * conditionally blur the element and refocus the last focused element
     *
     * @private
     */


    ModalDialog.prototype.conditionalBlur_ = function conditionalBlur_() {
      if (this.previouslyActiveEl_) {
        this.previouslyActiveEl_.focus();
        this.previouslyActiveEl_ = null;
      }

      this.off(document_1, 'keydown', this.handleKeyDown);
    };

    /**
     * Keydown handler. Attached when modal is focused.
     *
     * @listens keydown
     */


    ModalDialog.prototype.handleKeyDown = function handleKeyDown(event) {
      // exit early if it isn't a tab key
      if (event.which !== 9) {
        return;
      }

      var focusableEls = this.focusableEls_();
      var activeEl = this.el_.querySelector(':focus');
      var focusIndex = void 0;

      for (var i = 0; i < focusableEls.length; i++) {
        if (activeEl === focusableEls[i]) {
          focusIndex = i;
          break;
        }
      }

      if (document_1.activeElement === this.el_) {
        focusIndex = 0;
      }

      if (event.shiftKey && focusIndex === 0) {
        focusableEls[focusableEls.length - 1].focus();
        event.preventDefault();
      } else if (!event.shiftKey && focusIndex === focusableEls.length - 1) {
        focusableEls[0].focus();
        event.preventDefault();
      }
    };

    /**
     * get all focusable elements
     *
     * @private
     */


    ModalDialog.prototype.focusableEls_ = function focusableEls_() {
      var allChildren = this.el_.querySelectorAll('*');

      return Array.prototype.filter.call(allChildren, function (child) {
        return (child instanceof window_1.HTMLAnchorElement || child instanceof window_1.HTMLAreaElement) && child.hasAttribute('href') || (child instanceof window_1.HTMLInputElement || child instanceof window_1.HTMLSelectElement || child instanceof window_1.HTMLTextAreaElement || child instanceof window_1.HTMLButtonElement) && !child.hasAttribute('disabled') || child instanceof window_1.HTMLIFrameElement || child instanceof window_1.HTMLObjectElement || child instanceof window_1.HTMLEmbedElement || child.hasAttribute('tabindex') && child.getAttribute('tabindex') !== -1 || child.hasAttribute('contenteditable');
      });
    };

    return ModalDialog;
  }(Component);

  /**
   * Default options for `ModalDialog` default options.
   *
   * @type {Object}
   * @private
   */


  ModalDialog.prototype.options_ = {
    pauseOnOpen: true,
    temporary: true
  };

  Component.registerComponent('ModalDialog', ModalDialog);

  /**
   * @file track-list.js
   */

  /**
   * Common functionaliy between {@link TextTrackList}, {@link AudioTrackList}, and
   * {@link VideoTrackList}
   *
   * @extends EventTarget
   */

  var TrackList = function (_EventTarget) {
    inherits(TrackList, _EventTarget);

    /**
     * Create an instance of this class
     *
     * @param {Track[]} tracks
     *        A list of tracks to initialize the list with.
     *
     * @abstract
     */
    function TrackList() {
      var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      classCallCheck(this, TrackList);

      var _this = possibleConstructorReturn(this, _EventTarget.call(this));

      _this.tracks_ = [];

      /**
       * @memberof TrackList
       * @member {number} length
       *         The current number of `Track`s in the this Trackist.
       * @instance
       */
      Object.defineProperty(_this, 'length', {
        get: function get$$1() {
          return this.tracks_.length;
        }
      });

      for (var i = 0; i < tracks.length; i++) {
        _this.addTrack(tracks[i]);
      }
      return _this;
    }

    /**
     * Add a {@link Track} to the `TrackList`
     *
     * @param {Track} track
     *        The audio, video, or text track to add to the list.
     *
     * @fires TrackList#addtrack
     */


    TrackList.prototype.addTrack = function addTrack(track) {
      var index = this.tracks_.length;

      if (!('' + index in this)) {
        Object.defineProperty(this, index, {
          get: function get$$1() {
            return this.tracks_[index];
          }
        });
      }

      // Do not add duplicate tracks
      if (this.tracks_.indexOf(track) === -1) {
        this.tracks_.push(track);
        /**
         * Triggered when a track is added to a track list.
         *
         * @event TrackList#addtrack
         * @type {EventTarget~Event}
         * @property {Track} track
         *           A reference to track that was added.
         */
        this.trigger({
          track: track,
          type: 'addtrack'
        });
      }
    };

    /**
     * Remove a {@link Track} from the `TrackList`
     *
     * @param {Track} rtrack
     *        The audio, video, or text track to remove from the list.
     *
     * @fires TrackList#removetrack
     */


    TrackList.prototype.removeTrack = function removeTrack(rtrack) {
      var track = void 0;

      for (var i = 0, l = this.length; i < l; i++) {
        if (this[i] === rtrack) {
          track = this[i];
          if (track.off) {
            track.off();
          }

          this.tracks_.splice(i, 1);

          break;
        }
      }

      if (!track) {
        return;
      }

      /**
       * Triggered when a track is removed from track list.
       *
       * @event TrackList#removetrack
       * @type {EventTarget~Event}
       * @property {Track} track
       *           A reference to track that was removed.
       */
      this.trigger({
        track: track,
        type: 'removetrack'
      });
    };

    /**
     * Get a Track from the TrackList by a tracks id
     *
     * @param {String} id - the id of the track to get
     * @method getTrackById
     * @return {Track}
     * @private
     */


    TrackList.prototype.getTrackById = function getTrackById(id) {
      var result = null;

      for (var i = 0, l = this.length; i < l; i++) {
        var track = this[i];

        if (track.id === id) {
          result = track;
          break;
        }
      }

      return result;
    };

    return TrackList;
  }(EventTarget);

  /**
   * Triggered when a different track is selected/enabled.
   *
   * @event TrackList#change
   * @type {EventTarget~Event}
   */

  /**
   * Events that can be called with on + eventName. See {@link EventHandler}.
   *
   * @property {Object} TrackList#allowedEvents_
   * @private
   */


  TrackList.prototype.allowedEvents_ = {
    change: 'change',
    addtrack: 'addtrack',
    removetrack: 'removetrack'
  };

  // emulate attribute EventHandler support to allow for feature detection
  for (var event in TrackList.prototype.allowedEvents_) {
    TrackList.prototype['on' + event] = null;
  }

  /**
   * @file audio-track-list.js
   */

  /**
   * Anywhere we call this function we diverge from the spec
   * as we only support one enabled audiotrack at a time
   *
   * @param {AudioTrackList} list
   *        list to work on
   *
   * @param {AudioTrack} track
   *        The track to skip
   *
   * @private
   */
  var disableOthers = function disableOthers(list, track) {
    for (var i = 0; i < list.length; i++) {
      if (!Object.keys(list[i]).length || track.id === list[i].id) {
        continue;
      }
      // another audio track is enabled, disable it
      list[i].enabled = false;
    }
  };

  /**
   * The current list of {@link AudioTrack} for a media file.
   *
   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist}
   * @extends TrackList
   */

  var AudioTrackList = function (_TrackList) {
    inherits(AudioTrackList, _TrackList);

    /**
     * Create an instance of this class.
     *
     * @param {AudioTrack[]} [tracks=[]]
     *        A list of `AudioTrack` to instantiate the list with.
     */
    function AudioTrackList() {
      var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      classCallCheck(this, AudioTrackList);

      // make sure only 1 track is enabled
      // sorted from last index to first index
      for (var i = tracks.length - 1; i >= 0; i--) {
        if (tracks[i].enabled) {
          disableOthers(tracks, tracks[i]);
          break;
        }
      }

      var _this = possibleConstructorReturn(this, _TrackList.call(this, tracks));

      _this.changing_ = false;
      return _this;
    }

    /**
     * Add an {@link AudioTrack} to the `AudioTrackList`.
     *
     * @param {AudioTrack} track
     *        The AudioTrack to add to the list
     *
     * @fires TrackList#addtrack
     */


    AudioTrackList.prototype.addTrack = function addTrack(track) {
      var _this2 = this;

      if (track.enabled) {
        disableOthers(this, track);
      }

      _TrackList.prototype.addTrack.call(this, track);
      // native tracks don't have this
      if (!track.addEventListener) {
        return;
      }

      /**
       * @listens AudioTrack#enabledchange
       * @fires TrackList#change
       */
      track.addEventListener('enabledchange', function () {
        // when we are disabling other tracks (since we don't support
        // more than one track at a time) we will set changing_
        // to true so that we don't trigger additional change events
        if (_this2.changing_) {
          return;
        }
        _this2.changing_ = true;
        disableOthers(_this2, track);
        _this2.changing_ = false;
        _this2.trigger('change');
      });
    };

    return AudioTrackList;
  }(TrackList);

  /**
   * @file video-track-list.js
   */

  /**
   * Un-select all other {@link VideoTrack}s that are selected.
   *
   * @param {VideoTrackList} list
   *        list to work on
   *
   * @param {VideoTrack} track
   *        The track to skip
   *
   * @private
   */
  var disableOthers$1 = function disableOthers(list, track) {
    for (var i = 0; i < list.length; i++) {
      if (!Object.keys(list[i]).length || track.id === list[i].id) {
        continue;
      }
      // another video track is enabled, disable it
      list[i].selected = false;
    }
  };

  /**
   * The current list of {@link VideoTrack} for a video.
   *
   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist}
   * @extends TrackList
   */

  var VideoTrackList = function (_TrackList) {
    inherits(VideoTrackList, _TrackList);

    /**
     * Create an instance of this class.
     *
     * @param {VideoTrack[]} [tracks=[]]
     *        A list of `VideoTrack` to instantiate the list with.
     */
    function VideoTrackList() {
      var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      classCallCheck(this, VideoTrackList);

      // make sure only 1 track is enabled
      // sorted from last index to first index
      for (var i = tracks.length - 1; i >= 0; i--) {
        if (tracks[i].selected) {
          disableOthers$1(tracks, tracks[i]);
          break;
        }
      }

      var _this = possibleConstructorReturn(this, _TrackList.call(this, tracks));

      _this.changing_ = false;

      /**
       * @member {number} VideoTrackList#selectedIndex
       *         The current index of the selected {@link VideoTrack`}.
       */
      Object.defineProperty(_this, 'selectedIndex', {
        get: function get$$1() {
          for (var _i = 0; _i < this.length; _i++) {
            if (this[_i].selected) {
              return _i;
            }
          }
          return -1;
        },
        set: function set$$1() {
        }
      });
      return _this;
    }

    /**
     * Add a {@link VideoTrack} to the `VideoTrackList`.
     *
     * @param {VideoTrack} track
     *        The VideoTrack to add to the list
     *
     * @fires TrackList#addtrack
     */


    VideoTrackList.prototype.addTrack = function addTrack(track) {
      var _this2 = this;

      if (track.selected) {
        disableOthers$1(this, track);
      }

      _TrackList.prototype.addTrack.call(this, track);
      // native tracks don't have this
      if (!track.addEventListener) {
        return;
      }

      /**
       * @listens VideoTrack#selectedchange
       * @fires TrackList#change
       */
      track.addEventListener('selectedchange', function () {
        if (_this2.changing_) {
          return;
        }
        _this2.changing_ = true;
        disableOthers$1(_this2, track);
        _this2.changing_ = false;
        _this2.trigger('change');
      });
    };

    return VideoTrackList;
  }(TrackList);

  /**
   * @file text-track-list.js
   */

  /**
   * The current list of {@link TextTrack} for a media file.
   *
   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttracklist}
   * @extends TrackList
   */

  var TextTrackList = function (_TrackList) {
    inherits(TextTrackList, _TrackList);

    function TextTrackList() {
      classCallCheck(this, TextTrackList);
      return possibleConstructorReturn(this, _TrackList.apply(this, arguments));
    }

    /**
     * Add a {@link TextTrack} to the `TextTrackList`
     *
     * @param {TextTrack} track
     *        The text track to add to the list.
     *
     * @fires TrackList#addtrack
     */
    TextTrackList.prototype.addTrack = function addTrack(track) {
      _TrackList.prototype.addTrack.call(this, track);

      /**
       * @listens TextTrack#modechange
       * @fires TrackList#change
       */
      track.addEventListener('modechange', bind(this, function () {
        this.trigger('change');
      }));

      var nonLanguageTextTrackKind = ['metadata', 'chapters'];

      if (nonLanguageTextTrackKind.indexOf(track.kind) === -1) {
        track.addEventListener('modechange', bind(this, function () {
          this.trigger('selectedlanguagechange');
        }));
      }
    };

    return TextTrackList;
  }(TrackList);

  /**
   * @file html-track-element-list.js
   */

  /**
   * The current list of {@link HtmlTrackElement}s.
   */
  var HtmlTrackElementList = function () {

    /**
     * Create an instance of this class.
     *
     * @param {HtmlTrackElement[]} [tracks=[]]
     *        A list of `HtmlTrackElement` to instantiate the list with.
     */
    function HtmlTrackElementList() {
      var trackElements = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      classCallCheck(this, HtmlTrackElementList);

      this.trackElements_ = [];

      /**
       * @memberof HtmlTrackElementList
       * @member {number} length
       *         The current number of `Track`s in the this Trackist.
       * @instance
       */
      Object.defineProperty(this, 'length', {
        get: function get$$1() {
          return this.trackElements_.length;
        }
      });

      for (var i = 0, length = trackElements.length; i < length; i++) {
        this.addTrackElement_(trackElements[i]);
      }
    }

    /**
     * Add an {@link HtmlTrackElement} to the `HtmlTrackElementList`
     *
     * @param {HtmlTrackElement} trackElement
     *        The track element to add to the list.
     *
     * @private
     */


    HtmlTrackElementList.prototype.addTrackElement_ = function addTrackElement_(trackElement) {
      var index = this.trackElements_.length;

      if (!('' + index in this)) {
        Object.defineProperty(this, index, {
          get: function get$$1() {
            return this.trackElements_[index];
          }
        });
      }

      // Do not add duplicate elements
      if (this.trackElements_.indexOf(trackElement) === -1) {
        this.trackElements_.push(trackElement);
      }
    };

    /**
     * Get an {@link HtmlTrackElement} from the `HtmlTrackElementList` given an
     * {@link TextTrack}.
     *
     * @param {TextTrack} track
     *        The track associated with a track element.
     *
     * @return {HtmlTrackElement|undefined}
     *         The track element that was found or undefined.
     *
     * @private
     */


    HtmlTrackElementList.prototype.getTrackElementByTrack_ = function getTrackElementByTrack_(track) {
      var trackElement_ = void 0;

      for (var i = 0, length = this.trackElements_.length; i < length; i++) {
        if (track === this.trackElements_[i].track) {
          trackElement_ = this.trackElements_[i];

          break;
        }
      }

      return trackElement_;
    };

    /**
     * Remove a {@link HtmlTrackElement} from the `HtmlTrackElementList`
     *
     * @param {HtmlTrackElement} trackElement
     *        The track element to remove from the list.
     *
     * @private
     */


    HtmlTrackElementList.prototype.removeTrackElement_ = function removeTrackElement_(trackElement) {
      for (var i = 0, length = this.trackElements_.length; i < length; i++) {
        if (trackElement === this.trackElements_[i]) {
          this.trackElements_.splice(i, 1);

          break;
        }
      }
    };

    return HtmlTrackElementList;
  }();

  /**
   * @file text-track-cue-list.js
   */

  /**
   * @typedef {Object} TextTrackCueList~TextTrackCue
   *
   * @property {string} id
   *           The unique id for this text track cue
   *
   * @property {number} startTime
   *           The start time for this text track cue
   *
   * @property {number} endTime
   *           The end time for this text track cue
   *
   * @property {boolean} pauseOnExit
   *           Pause when the end time is reached if true.
   *
   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcue}
   */

  /**
   * A List of TextTrackCues.
   *
   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcuelist}
   */
  var TextTrackCueList = function () {

    /**
     * Create an instance of this class..
     *
     * @param {Array} cues
     *        A list of cues to be initialized with
     */
    function TextTrackCueList(cues) {
      classCallCheck(this, TextTrackCueList);

      TextTrackCueList.prototype.setCues_.call(this, cues);

      /**
       * @memberof TextTrackCueList
       * @member {number} length
       *         The current number of `TextTrackCue`s in the TextTrackCueList.
       * @instance
       */
      Object.defineProperty(this, 'length', {
        get: function get$$1() {
          return this.length_;
        }
      });
    }

    /**
     * A setter for cues in this list. Creates getters
     * an an index for the cues.
     *
     * @param {Array} cues
     *        An array of cues to set
     *
     * @private
     */


    TextTrackCueList.prototype.setCues_ = function setCues_(cues) {
      var oldLength = this.length || 0;
      var i = 0;
      var l = cues.length;

      this.cues_ = cues;
      this.length_ = cues.length;

      var defineProp = function defineProp(index) {
        if (!('' + index in this)) {
          Object.defineProperty(this, '' + index, {
            get: function get$$1() {
              return this.cues_[index];
            }
          });
        }
      };

      if (oldLength < l) {
        i = oldLength;

        for (; i < l; i++) {
          defineProp.call(this, i);
        }
      }
    };

    /**
     * Get a `TextTrackCue` that is currently in the `TextTrackCueList` by id.
     *
     * @param {string} id
     *        The id of the cue that should be searched for.
     *
     * @return {TextTrackCueList~TextTrackCue|null}
     *         A single cue or null if none was found.
     */


    TextTrackCueList.prototype.getCueById = function getCueById(id) {
      var result = null;

      for (var i = 0, l = this.length; i < l; i++) {
        var cue = this[i];

        if (cue.id === id) {
          result = cue;
          break;
        }
      }

      return result;
    };

    return TextTrackCueList;
  }();

  /**
   * @file track-kinds.js
   */

  /**
   * All possible `VideoTrackKind`s
   *
   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-videotrack-kind
   * @typedef VideoTrack~Kind
   * @enum
   */
  var VideoTrackKind = {
    alternative: 'alternative',
    captions: 'captions',
    main: 'main',
    sign: 'sign',
    subtitles: 'subtitles',
    commentary: 'commentary'
  };

  /**
   * All possible `AudioTrackKind`s
   *
   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-audiotrack-kind
   * @typedef AudioTrack~Kind
   * @enum
   */
  var AudioTrackKind = {
    'alternative': 'alternative',
    'descriptions': 'descriptions',
    'main': 'main',
    'main-desc': 'main-desc',
    'translation': 'translation',
    'commentary': 'commentary'
  };

  /**
   * All possible `TextTrackKind`s
   *
   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-texttrack-kind
   * @typedef TextTrack~Kind
   * @enum
   */
  var TextTrackKind = {
    subtitles: 'subtitles',
    captions: 'captions',
    descriptions: 'descriptions',
    chapters: 'chapters',
    metadata: 'metadata'
  };

  /**
   * All possible `TextTrackMode`s
   *
   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackmode
   * @typedef TextTrack~Mode
   * @enum
   */
  var TextTrackMode = {
    disabled: 'disabled',
    hidden: 'hidden',
    showing: 'showing'
  };

  /**
   * @file track.js
   */

  /**
   * A Track class that contains all of the common functionality for {@link AudioTrack},
   * {@link VideoTrack}, and {@link TextTrack}.
   *
   * > Note: This class should not be used directly
   *
   * @see {@link https://html.spec.whatwg.org/multipage/embedded-content.html}
   * @extends EventTarget
   * @abstract
   */

  var Track = function (_EventTarget) {
    inherits(Track, _EventTarget);

    /**
     * Create an instance of this class.
     *
     * @param {Object} [options={}]
     *        Object of option names and values
     *
     * @param {string} [options.kind='']
     *        A valid kind for the track type you are creating.
     *
     * @param {string} [options.id='vjs_track_' + Guid.newGUID()]
     *        A unique id for this AudioTrack.
     *
     * @param {string} [options.label='']
     *        The menu label for this track.
     *
     * @param {string} [options.language='']
     *        A valid two character language code.
     *
     * @abstract
     */
    function Track() {
      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      classCallCheck(this, Track);

      var _this = possibleConstructorReturn(this, _EventTarget.call(this));

      var trackProps = {
        id: options.id || 'vjs_track_' + newGUID(),
        kind: options.kind || '',
        label: options.label || '',
        language: options.language || ''
      };

      /**
       * @memberof Track
       * @member {string} id
       *         The id of this track. Cannot be changed after creation.
       * @instance
       *
       * @readonly
       */

      /**
       * @memberof Track
       * @member {string} kind
       *         The kind of track that this is. Cannot be changed after creation.
       * @instance
       *
       * @readonly
       */

      /**
       * @memberof Track
       * @member {string} label
       *         The label of this track. Cannot be changed after creation.
       * @instance
       *
       * @readonly
       */

      /**
       * @memberof Track
       * @member {string} language
       *         The two letter language code for this track. Cannot be changed after
       *         creation.
       * @instance
       *
       * @readonly
       */

      var _loop = function _loop(key) {
        Object.defineProperty(_this, key, {
          get: function get$$1() {
            return trackProps[key];
          },
          set: function set$$1() {
          }
        });
      };

      for (var key in trackProps) {
        _loop(key);
      }
      return _this;
    }

    return Track;
  }(EventTarget);

  /**
   * @file url.js
   * @module url
   */

  /**
   * @typedef {Object} url:URLObject
   *
   * @property {string} protocol
   *           The protocol of the url that was parsed.
   *
   * @property {string} hostname
   *           The hostname of the url that was parsed.
   *
   * @property {string} port
   *           The port of the url that was parsed.
   *
   * @property {string} pathname
   *           The pathname of the url that was parsed.
   *
   * @property {string} search
   *           The search query of the url that was parsed.
   *
   * @property {string} hash
   *           The hash of the url that was parsed.
   *
   * @property {string} host
   *           The host of the url that was parsed.
   */

  /**
   * Resolve and parse the elements of a URL.
   *
   * @param  {String} url
   *         The url to parse
   *
   * @return {url:URLObject}
   *         An object of url details
   */
  var parseUrl = function parseUrl(url) {
    var props = ['protocol', 'hostname', 'port', 'pathname', 'search', 'hash', 'host'];

    // add the url to an anchor and let the browser parse the URL
    var a = document_1.createElement('a');

    a.href = url;

    // IE8 (and 9?) Fix
    // ie8 doesn't parse the URL correctly until the anchor is actually
    // added to the body, and an innerHTML is needed to trigger the parsing
    var addToBody = a.host === '' && a.protocol !== 'file:';
    var div = void 0;

    if (addToBody) {
      div = document_1.createElement('div');
      div.innerHTML = '<a href="' + url + '"></a>';
      a = div.firstChild;
      // prevent the div from affecting layout
      div.setAttribute('style', 'display:none; position:absolute;');
      document_1.body.appendChild(div);
    }

    // Copy the specific URL properties to a new object
    // This is also needed for IE8 because the anchor loses its
    // properties when it's removed from the dom
    var details = {};

    for (var i = 0; i < props.length; i++) {
      details[props[i]] = a[props[i]];
    }

    // IE9 adds the port to the host property unlike everyone else. If
    // a port identifier is added for standard ports, strip it.
    if (details.protocol === 'http:') {
      details.host = details.host.replace(/:80$/, '');
    }

    if (details.protocol === 'https:') {
      details.host = details.host.replace(/:443$/, '');
    }

    if (!details.protocol) {
      details.protocol = window_1.location.protocol;
    }

    if (addToBody) {
      document_1.body.removeChild(div);
    }

    return details;
  };

  /**
   * Get absolute version of relative URL. Used to tell flash correct URL.
   *
   *
   * @param  {string} url
   *         URL to make absolute
   *
   * @return {string}
   *         Absolute URL
   *
   * @see http://stackoverflow.com/questions/470832/getting-an-absolute-url-from-a-relative-one-ie6-issue
   */
  var getAbsoluteURL = function getAbsoluteURL(url) {
    // Check if absolute URL
    if (!url.match(/^https?:\/\//)) {
      // Convert to absolute URL. Flash hosted off-site needs an absolute URL.
      var div = document_1.createElement('div');

      div.innerHTML = '<a href="' + url + '">x</a>';
      url = div.firstChild.href;
    }

    return url;
  };

  /**
   * Returns the extension of the passed file name. It will return an empty string
   * if passed an invalid path.
   *
   * @param {string} path
   *        The fileName path like '/path/to/file.mp4'
   *
   * @returns {string}
   *          The extension in lower case or an empty string if no
   *          extension could be found.
   */
  var getFileExtension = function getFileExtension(path) {
    if (typeof path === 'string') {
      var splitPathRe = /^(\/?)([\s\S]*?)((?:\.{1,2}|[^\/]+?)(\.([^\.\/\?]+)))(?:[\/]*|[\?].*)$/i;
      var pathParts = splitPathRe.exec(path);

      if (pathParts) {
        return pathParts.pop().toLowerCase();
      }
    }

    return '';
  };

  /**
   * Returns whether the url passed is a cross domain request or not.
   *
   * @param {string} url
   *        The url to check.
   *
   * @return {boolean}
   *         Whether it is a cross domain request or not.
   */
  var isCrossOrigin = function isCrossOrigin(url) {
    var winLoc = window_1.location;
    var urlInfo = parseUrl(url);

    // IE8 protocol relative urls will return ':' for protocol
    var srcProtocol = urlInfo.protocol === ':' ? winLoc.protocol : urlInfo.protocol;

    // Check if url is for another domain/origin
    // IE8 doesn't know location.origin, so we won't rely on it here
    var crossOrigin = srcProtocol + urlInfo.host !== winLoc.protocol + winLoc.host;

    return crossOrigin;
  };

  var Url = /*#__PURE__*/Object.freeze({
    parseUrl: parseUrl,
    getAbsoluteURL: getAbsoluteURL,
    getFileExtension: getFileExtension,
    isCrossOrigin: isCrossOrigin
  });

  var isFunction_1 = isFunction;

  var toString$1 = Object.prototype.toString;

  function isFunction(fn) {
    var string = toString$1.call(fn);
    return string === '[object Function]' || typeof fn === 'function' && string !== '[object RegExp]' || typeof window !== 'undefined' && (
      // IE8 and below
      fn === window.setTimeout || fn === window.alert || fn === window.confirm || fn === window.prompt);
  }

  var isFunction$1 = /*#__PURE__*/Object.freeze({
    default: isFunction_1,
    __moduleExports: isFunction_1
  });

  var trim_1 = createCommonjsModule(function (module, exports) {
    exports = module.exports = trim;

    function trim(str) {
      return str.replace(/^\s*|\s*$/g, '');
    }

    exports.left = function (str) {
      return str.replace(/^\s*/, '');
    };

    exports.right = function (str) {
      return str.replace(/\s*$/, '');
    };
  });
  var trim_2 = trim_1.left;
  var trim_3 = trim_1.right;

  var trim = /*#__PURE__*/Object.freeze({
    default: trim_1,
    __moduleExports: trim_1,
    left: trim_2,
    right: trim_3
  });

  var isFunction$2 = (isFunction$1 && isFunction_1) || isFunction$1;

  var forEach_1 = forEach;

  var toString$2 = Object.prototype.toString;
  var hasOwnProperty = Object.prototype.hasOwnProperty;

  function forEach(list, iterator, context) {
    if (!isFunction$2(iterator)) {
      throw new TypeError('iterator must be a function');
    }

    if (arguments.length < 3) {
      context = this;
    }

    if (toString$2.call(list) === '[object Array]') forEachArray(list, iterator, context); else if (typeof list === 'string') forEachString(list, iterator, context); else forEachObject(list, iterator, context);
  }

  function forEachArray(array, iterator, context) {
    for (var i = 0, len = array.length; i < len; i++) {
      if (hasOwnProperty.call(array, i)) {
        iterator.call(context, array[i], i, array);
      }
    }
  }

  function forEachString(string, iterator, context) {
    for (var i = 0, len = string.length; i < len; i++) {
      // no such thing as a sparse string.
      iterator.call(context, string.charAt(i), i, string);
    }
  }

  function forEachObject(object, iterator, context) {
    for (var k in object) {
      if (hasOwnProperty.call(object, k)) {
        iterator.call(context, object[k], k, object);
      }
    }
  }

  var forEach$1 = /*#__PURE__*/Object.freeze({
    default: forEach_1,
    __moduleExports: forEach_1
  });

  var trim$1 = (trim && trim_1) || trim;

  var forEach$2 = (forEach$1 && forEach_1) || forEach$1;

  var isArray = function isArray(arg) {
    return Object.prototype.toString.call(arg) === '[object Array]';
  };

  var parseHeaders = function parseHeaders(headers) {
    if (!headers) return {};

    var result = {};

    forEach$2(trim$1(headers).split('\n'), function (row) {
      var index = row.indexOf(':'),
        key = trim$1(row.slice(0, index)).toLowerCase(),
        value = trim$1(row.slice(index + 1));

      if (typeof result[key] === 'undefined') {
        result[key] = value;
      } else if (isArray(result[key])) {
        result[key].push(value);
      } else {
        result[key] = [result[key], value];
      }
    });

    return result;
  };

  var parseHeaders$1 = /*#__PURE__*/Object.freeze({
    default: parseHeaders,
    __moduleExports: parseHeaders
  });

  var immutable = extend;

  var hasOwnProperty$1 = Object.prototype.hasOwnProperty;

  function extend() {
    var target = {};

    for (var i = 0; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (hasOwnProperty$1.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  }

  var immutable$1 = /*#__PURE__*/Object.freeze({
    default: immutable,
    __moduleExports: immutable
  });

  var parseHeaders$2 = (parseHeaders$1 && parseHeaders) || parseHeaders$1;

  var xtend = (immutable$1 && immutable) || immutable$1;

  var xhr = createXHR;
  createXHR.XMLHttpRequest = window_1.XMLHttpRequest || noop;
  createXHR.XDomainRequest = "withCredentials" in new createXHR.XMLHttpRequest() ? createXHR.XMLHttpRequest : window_1.XDomainRequest;

  forEachArray$1(["get", "put", "post", "patch", "head", "delete"], function (method) {
    createXHR[method === "delete" ? "del" : method] = function (uri, options, callback) {
      options = initParams(uri, options, callback);
      options.method = method.toUpperCase();
      return _createXHR(options);
    };
  });

  function forEachArray$1(array, iterator) {
    for (var i = 0; i < array.length; i++) {
      iterator(array[i]);
    }
  }

  function isEmpty(obj) {
    for (var i in obj) {
      if (obj.hasOwnProperty(i)) return false;
    }
    return true;
  }

  function initParams(uri, options, callback) {
    var params = uri;

    if (isFunction$2(options)) {
      callback = options;
      if (typeof uri === "string") {
        params = {uri: uri};
      }
    } else {
      params = xtend(options, {uri: uri});
    }

    params.callback = callback;
    return params;
  }

  function createXHR(uri, options, callback) {
    options = initParams(uri, options, callback);
    return _createXHR(options);
  }

  function _createXHR(options) {
    if (typeof options.callback === "undefined") {
      throw new Error("callback argument missing");
    }

    var called = false;
    var callback = function cbOnce(err, response, body) {
      if (!called) {
        called = true;
        options.callback(err, response, body);
      }
    };

    function readystatechange() {
      if (xhr.readyState === 4) {
        setTimeout(loadFunc, 0);
      }
    }

    function getBody() {
      // Chrome with requestType=blob throws errors arround when even testing access to responseText
      var body = undefined;

      if (xhr.response) {
        body = xhr.response;
      } else {
        body = xhr.responseText || getXml(xhr);
      }

      if (isJson) {
        try {
          body = JSON.parse(body);
        } catch (e) {
        }
      }

      return body;
    }

    function errorFunc(evt) {
      clearTimeout(timeoutTimer);
      if (!(evt instanceof Error)) {
        evt = new Error("" + (evt || "Unknown XMLHttpRequest Error"));
      }
      evt.statusCode = 0;
      return callback(evt, failureResponse);
    }

    // will load the data & process the response in a special response object
    function loadFunc() {
      if (aborted) return;
      var status;
      clearTimeout(timeoutTimer);
      if (options.useXDR && xhr.status === undefined) {
        //IE8 CORS GET successful response doesn't have a status field, but body is fine
        status = 200;
      } else {
        status = xhr.status === 1223 ? 204 : xhr.status;
      }
      var response = failureResponse;
      var err = null;

      if (status !== 0) {
        response = {
          body: getBody(),
          statusCode: status,
          method: method,
          headers: {},
          url: uri,
          rawRequest: xhr
        };
        if (xhr.getAllResponseHeaders) {
          //remember xhr can in fact be XDR for CORS in IE
          response.headers = parseHeaders$2(xhr.getAllResponseHeaders());
        }
      } else {
        err = new Error("Internal XMLHttpRequest Error");
      }
      return callback(err, response, response.body);
    }

    var xhr = options.xhr || null;

    if (!xhr) {
      if (options.cors || options.useXDR) {
        xhr = new createXHR.XDomainRequest();
      } else {
        xhr = new createXHR.XMLHttpRequest();
      }
    }

    var key;
    var aborted;
    var uri = xhr.url = options.uri || options.url;
    var method = xhr.method = options.method || "GET";
    var body = options.body || options.data;
    var headers = xhr.headers = options.headers || {};
    var sync = !!options.sync;
    var isJson = false;
    var timeoutTimer;
    var failureResponse = {
      body: undefined,
      headers: {},
      statusCode: 0,
      method: method,
      url: uri,
      rawRequest: xhr
    };

    if ("json" in options && options.json !== false) {
      isJson = true;
      headers["accept"] || headers["Accept"] || (headers["Accept"] = "application/json"); //Don't override existing accept header declared by user
      if (method !== "GET" && method !== "HEAD") {
        headers["content-type"] || headers["Content-Type"] || (headers["Content-Type"] = "application/json"); //Don't override existing accept header declared by user
        body = JSON.stringify(options.json === true ? body : options.json);
      }
    }

    xhr.onreadystatechange = readystatechange;
    xhr.onload = loadFunc;
    xhr.onerror = errorFunc;
    // IE9 must have onprogress be set to a unique function.
    xhr.onprogress = function () {
      // IE must die
    };
    xhr.onabort = function () {
      aborted = true;
    };
    xhr.ontimeout = errorFunc;
    xhr.open(method, uri, !sync, options.username, options.password);
    //has to be after open
    if (!sync) {
      xhr.withCredentials = !!options.withCredentials;
    }
    // Cannot set timeout with sync request
    // not setting timeout on the xhr object, because of old webkits etc. not handling that correctly
    // both npm's request and jquery 1.x use this kind of timeout, so this is being consistent
    if (!sync && options.timeout > 0) {
      timeoutTimer = setTimeout(function () {
        if (aborted) return;
        aborted = true; //IE9 may still call readystatechange
        xhr.abort("timeout");
        var e = new Error("XMLHttpRequest timeout");
        e.code = "ETIMEDOUT";
        errorFunc(e);
      }, options.timeout);
    }

    if (xhr.setRequestHeader) {
      for (key in headers) {
        if (headers.hasOwnProperty(key)) {
          xhr.setRequestHeader(key, headers[key]);
        }
      }
    } else if (options.headers && !isEmpty(options.headers)) {
      throw new Error("Headers cannot be set on an XDomainRequest object");
    }

    if ("responseType" in options) {
      xhr.responseType = options.responseType;
    }

    if ("beforeSend" in options && typeof options.beforeSend === "function") {
      options.beforeSend(xhr);
    }

    // Microsoft Edge browser sends "undefined" when send is called with undefined value.
    // XMLHttpRequest spec says to pass null as body to indicate no body
    // See https://github.com/naugtur/xhr/issues/100.
    xhr.send(body || null);

    return xhr;
  }

  function getXml(xhr) {
    if (xhr.responseType === "document") {
      return xhr.responseXML;
    }
    var firefoxBugTakenEffect = xhr.responseXML && xhr.responseXML.documentElement.nodeName === "parsererror";
    if (xhr.responseType === "" && !firefoxBugTakenEffect) {
      return xhr.responseXML;
    }

    return null;
  }

  function noop() {
  }

  /**
   * @file text-track.js
   */

  /**
   * Takes a webvtt file contents and parses it into cues
   *
   * @param {string} srcContent
   *        webVTT file contents
   *
   * @param {TextTrack} track
   *        TextTrack to add cues to. Cues come from the srcContent.
   *
   * @private
   */
  var parseCues = function parseCues(srcContent, track) {
    var parser = new window_1.WebVTT.Parser(window_1, window_1.vttjs, window_1.WebVTT.StringDecoder());
    var errors = [];

    parser.oncue = function (cue) {
      track.addCue(cue);
    };

    parser.onparsingerror = function (error) {
      errors.push(error);
    };

    parser.onflush = function () {
      track.trigger({
        type: 'loadeddata',
        target: track
      });
    };

    parser.parse(srcContent);
    if (errors.length > 0) {
      if (window_1.console && window_1.console.groupCollapsed) {
        window_1.console.groupCollapsed('Text Track parsing errors for ' + track.src);
      }
      errors.forEach(function (error) {
        return log$1.error(error);
      });
      if (window_1.console && window_1.console.groupEnd) {
        window_1.console.groupEnd();
      }
    }

    parser.flush();
  };

  /**
   * Load a `TextTrack` from a specified url.
   *
   * @param {string} src
   *        Url to load track from.
   *
   * @param {TextTrack} track
   *        Track to add cues to. Comes from the content at the end of `url`.
   *
   * @private
   */
  var loadTrack = function loadTrack(src, track) {
    var opts = {
      uri: src
    };
    var crossOrigin = isCrossOrigin(src);

    if (crossOrigin) {
      opts.cors = crossOrigin;
    }

    xhr(opts, bind(this, function (err, response, responseBody) {
      if (err) {
        return log$1.error(err, response);
      }

      track.loaded_ = true;

      // Make sure that vttjs has loaded, otherwise, wait till it finished loading
      // NOTE: this is only used for the alt/video.novtt.js build
      if (typeof window_1.WebVTT !== 'function') {
        if (track.tech_) {
          var loadHandler = function loadHandler() {
            return parseCues(responseBody, track);
          };

          track.tech_.on('vttjsloaded', loadHandler);
          track.tech_.on('vttjserror', function () {
            log$1.error('vttjs failed to load, stopping trying to process ' + track.src);
            track.tech_.off('vttjsloaded', loadHandler);
          });
        }
      } else {
        parseCues(responseBody, track);
      }
    }));
  };

  /**
   * A representation of a single `TextTrack`.
   *
   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrack}
   * @extends Track
   */

  var TextTrack = function (_Track) {
    inherits(TextTrack, _Track);

    /**
     * Create an instance of this class.
     *
     * @param {Object} options={}
     *        Object of option names and values
     *
     * @param {Tech} options.tech
     *        A reference to the tech that owns this TextTrack.
     *
     * @param {TextTrack~Kind} [options.kind='subtitles']
     *        A valid text track kind.
     *
     * @param {TextTrack~Mode} [options.mode='disabled']
     *        A valid text track mode.
     *
     * @param {string} [options.id='vjs_track_' + Guid.newGUID()]
     *        A unique id for this TextTrack.
     *
     * @param {string} [options.label='']
     *        The menu label for this track.
     *
     * @param {string} [options.language='']
     *        A valid two character language code.
     *
     * @param {string} [options.srclang='']
     *        A valid two character language code. An alternative, but deprioritized
     *        version of `options.language`
     *
     * @param {string} [options.src]
     *        A url to TextTrack cues.
     *
     * @param {boolean} [options.default]
     *        If this track should default to on or off.
     */
    function TextTrack() {
      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      classCallCheck(this, TextTrack);

      if (!options.tech) {
        throw new Error('A tech was not provided.');
      }

      var settings = mergeOptions(options, {
        kind: TextTrackKind[options.kind] || 'subtitles',
        language: options.language || options.srclang || ''
      });
      var mode = TextTrackMode[settings.mode] || 'disabled';
      var default_ = settings.default;

      if (settings.kind === 'metadata' || settings.kind === 'chapters') {
        mode = 'hidden';
      }

      var _this = possibleConstructorReturn(this, _Track.call(this, settings));

      _this.tech_ = settings.tech;

      _this.cues_ = [];
      _this.activeCues_ = [];

      var cues = new TextTrackCueList(_this.cues_);
      var activeCues = new TextTrackCueList(_this.activeCues_);
      var changed = false;
      var timeupdateHandler = bind(_this, function () {

        // Accessing this.activeCues for the side-effects of updating itself
        // due to it's nature as a getter function. Do not remove or cues will
        // stop updating!
        /* eslint-disable no-unused-expressions */
        this.activeCues;
        /* eslint-enable no-unused-expressions */
        if (changed) {
          this.trigger('cuechange');
          changed = false;
        }
      });

      if (mode !== 'disabled') {
        _this.tech_.ready(function () {
          _this.tech_.on('timeupdate', timeupdateHandler);
        }, true);
      }

      Object.defineProperties(_this, {
        /**
         * @memberof TextTrack
         * @member {boolean} default
         *         If this track was set to be on or off by default. Cannot be changed after
         *         creation.
         * @instance
         *
         * @readonly
         */
        default: {
          get: function get$$1() {
            return default_;
          },
          set: function set$$1() {
          }
        },

        /**
         * @memberof TextTrack
         * @member {string} mode
         *         Set the mode of this TextTrack to a valid {@link TextTrack~Mode}. Will
         *         not be set if setting to an invalid mode.
         * @instance
         *
         * @fires TextTrack#modechange
         */
        mode: {
          get: function get$$1() {
            return mode;
          },
          set: function set$$1(newMode) {
            var _this2 = this;

            if (!TextTrackMode[newMode]) {
              return;
            }
            mode = newMode;
            if (mode === 'showing') {

              this.tech_.ready(function () {
                _this2.tech_.on('timeupdate', timeupdateHandler);
              }, true);
            }
            /**
             * An event that fires when mode changes on this track. This allows
             * the TextTrackList that holds this track to act accordingly.
             *
             * > Note: This is not part of the spec!
             *
             * @event TextTrack#modechange
             * @type {EventTarget~Event}
             */
            this.trigger('modechange');
          }
        },

        /**
         * @memberof TextTrack
         * @member {TextTrackCueList} cues
         *         The text track cue list for this TextTrack.
         * @instance
         */
        cues: {
          get: function get$$1() {
            if (!this.loaded_) {
              return null;
            }

            return cues;
          },
          set: function set$$1() {
          }
        },

        /**
         * @memberof TextTrack
         * @member {TextTrackCueList} activeCues
         *         The list text track cues that are currently active for this TextTrack.
         * @instance
         */
        activeCues: {
          get: function get$$1() {
            if (!this.loaded_) {
              return null;
            }

            // nothing to do
            if (this.cues.length === 0) {
              return activeCues;
            }

            var ct = this.tech_.currentTime();
            var active = [];

            for (var i = 0, l = this.cues.length; i < l; i++) {
              var cue = this.cues[i];

              if (cue.startTime <= ct && cue.endTime >= ct) {
                active.push(cue);
              } else if (cue.startTime === cue.endTime && cue.startTime <= ct && cue.startTime + 0.5 >= ct) {
                active.push(cue);
              }
            }

            changed = false;

            if (active.length !== this.activeCues_.length) {
              changed = true;
            } else {
              for (var _i = 0; _i < active.length; _i++) {
                if (this.activeCues_.indexOf(active[_i]) === -1) {
                  changed = true;
                }
              }
            }

            this.activeCues_ = active;
            activeCues.setCues_(this.activeCues_);

            return activeCues;
          },
          set: function set$$1() {
          }
        }
      });

      if (settings.src) {
        _this.src = settings.src;
        loadTrack(settings.src, _this);
      } else {
        _this.loaded_ = true;
      }
      return _this;
    }

    /**
     * Add a cue to the internal list of cues.
     *
     * @param {TextTrack~Cue} cue
     *        The cue to add to our internal list
     */


    TextTrack.prototype.addCue = function addCue(originalCue) {
      var cue = originalCue;

      if (window_1.vttjs && !(originalCue instanceof window_1.vttjs.VTTCue)) {
        cue = new window_1.vttjs.VTTCue(originalCue.startTime, originalCue.endTime, originalCue.text);

        for (var prop in originalCue) {
          if (!(prop in cue)) {
            cue[prop] = originalCue[prop];
          }
        }

        // make sure that `id` is copied over
        cue.id = originalCue.id;
        cue.originalCue_ = originalCue;
      }

      var tracks = this.tech_.textTracks();

      for (var i = 0; i < tracks.length; i++) {
        if (tracks[i] !== this) {
          tracks[i].removeCue(cue);
        }
      }

      this.cues_.push(cue);
      this.cues.setCues_(this.cues_);
    };

    /**
     * Remove a cue from our internal list
     *
     * @param {TextTrack~Cue} removeCue
     *        The cue to remove from our internal list
     */


    TextTrack.prototype.removeCue = function removeCue(_removeCue) {
      var i = this.cues_.length;

      while (i--) {
        var cue = this.cues_[i];

        if (cue === _removeCue || cue.originalCue_ && cue.originalCue_ === _removeCue) {
          this.cues_.splice(i, 1);
          this.cues.setCues_(this.cues_);
          break;
        }
      }
    };

    return TextTrack;
  }(Track);

  /**
   * cuechange - One or more cues in the track have become active or stopped being active.
   */


  TextTrack.prototype.allowedEvents_ = {
    cuechange: 'cuechange'
  };

  /**
   * A representation of a single `AudioTrack`. If it is part of an {@link AudioTrackList}
   * only one `AudioTrack` in the list will be enabled at a time.
   *
   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotrack}
   * @extends Track
   */

  var AudioTrack = function (_Track) {
    inherits(AudioTrack, _Track);

    /**
     * Create an instance of this class.
     *
     * @param {Object} [options={}]
     *        Object of option names and values
     *
     * @param {AudioTrack~Kind} [options.kind='']
     *        A valid audio track kind
     *
     * @param {string} [options.id='vjs_track_' + Guid.newGUID()]
     *        A unique id for this AudioTrack.
     *
     * @param {string} [options.label='']
     *        The menu label for this track.
     *
     * @param {string} [options.language='']
     *        A valid two character language code.
     *
     * @param {boolean} [options.enabled]
     *        If this track is the one that is currently playing. If this track is part of
     *        an {@link AudioTrackList}, only one {@link AudioTrack} will be enabled.
     */
    function AudioTrack() {
      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      classCallCheck(this, AudioTrack);

      var settings = mergeOptions(options, {
        kind: AudioTrackKind[options.kind] || ''
      });

      var _this = possibleConstructorReturn(this, _Track.call(this, settings));

      var enabled = false;

      /**
       * @memberof AudioTrack
       * @member {boolean} enabled
       *         If this `AudioTrack` is enabled or not. When setting this will
       *         fire {@link AudioTrack#enabledchange} if the state of enabled is changed.
       * @instance
       *
       * @fires VideoTrack#selectedchange
       */
      Object.defineProperty(_this, 'enabled', {
        get: function get$$1() {
          return enabled;
        },
        set: function set$$1(newEnabled) {
          // an invalid or unchanged value
          if (typeof newEnabled !== 'boolean' || newEnabled === enabled) {
            return;
          }
          enabled = newEnabled;

          /**
           * An event that fires when enabled changes on this track. This allows
           * the AudioTrackList that holds this track to act accordingly.
           *
           * > Note: This is not part of the spec! Native tracks will do
           *         this internally without an event.
           *
           * @event AudioTrack#enabledchange
           * @type {EventTarget~Event}
           */
          this.trigger('enabledchange');
        }
      });

      // if the user sets this track to selected then
      // set selected to that true value otherwise
      // we keep it false
      if (settings.enabled) {
        _this.enabled = settings.enabled;
      }
      _this.loaded_ = true;
      return _this;
    }

    return AudioTrack;
  }(Track);

  /**
   * A representation of a single `VideoTrack`.
   *
   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotrack}
   * @extends Track
   */

  var VideoTrack = function (_Track) {
    inherits(VideoTrack, _Track);

    /**
     * Create an instance of this class.
     *
     * @param {Object} [options={}]
     *        Object of option names and values
     *
     * @param {string} [options.kind='']
     *        A valid {@link VideoTrack~Kind}
     *
     * @param {string} [options.id='vjs_track_' + Guid.newGUID()]
     *        A unique id for this AudioTrack.
     *
     * @param {string} [options.label='']
     *        The menu label for this track.
     *
     * @param {string} [options.language='']
     *        A valid two character language code.
     *
     * @param {boolean} [options.selected]
     *        If this track is the one that is currently playing.
     */
    function VideoTrack() {
      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      classCallCheck(this, VideoTrack);

      var settings = mergeOptions(options, {
        kind: VideoTrackKind[options.kind] || ''
      });

      var _this = possibleConstructorReturn(this, _Track.call(this, settings));

      var selected = false;

      /**
       * @memberof VideoTrack
       * @member {boolean} selected
       *         If this `VideoTrack` is selected or not. When setting this will
       *         fire {@link VideoTrack#selectedchange} if the state of selected changed.
       * @instance
       *
       * @fires VideoTrack#selectedchange
       */
      Object.defineProperty(_this, 'selected', {
        get: function get$$1() {
          return selected;
        },
        set: function set$$1(newSelected) {
          // an invalid or unchanged value
          if (typeof newSelected !== 'boolean' || newSelected === selected) {
            return;
          }
          selected = newSelected;

          /**
           * An event that fires when selected changes on this track. This allows
           * the VideoTrackList that holds this track to act accordingly.
           *
           * > Note: This is not part of the spec! Native tracks will do
           *         this internally without an event.
           *
           * @event VideoTrack#selectedchange
           * @type {EventTarget~Event}
           */
          this.trigger('selectedchange');
        }
      });

      // if the user sets this track to selected then
      // set selected to that true value otherwise
      // we keep it false
      if (settings.selected) {
        _this.selected = settings.selected;
      }
      return _this;
    }

    return VideoTrack;
  }(Track);

  /**
   * @file html-track-element.js
   */

  /**
   * @memberof HTMLTrackElement
   * @typedef {HTMLTrackElement~ReadyState}
   * @enum {number}
   */
  var NONE = 0;
  var LOADING = 1;
  var LOADED = 2;
  var ERROR = 3;

  /**
   * A single track represented in the DOM.
   *
   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#htmltrackelement}
   * @extends EventTarget
   */

  var HTMLTrackElement = function (_EventTarget) {
    inherits(HTMLTrackElement, _EventTarget);

    /**
     * Create an instance of this class.
     *
     * @param {Object} options={}
     *        Object of option names and values
     *
     * @param {Tech} options.tech
     *        A reference to the tech that owns this HTMLTrackElement.
     *
     * @param {TextTrack~Kind} [options.kind='subtitles']
     *        A valid text track kind.
     *
     * @param {TextTrack~Mode} [options.mode='disabled']
     *        A valid text track mode.
     *
     * @param {string} [options.id='vjs_track_' + Guid.newGUID()]
     *        A unique id for this TextTrack.
     *
     * @param {string} [options.label='']
     *        The menu label for this track.
     *
     * @param {string} [options.language='']
     *        A valid two character language code.
     *
     * @param {string} [options.srclang='']
     *        A valid two character language code. An alternative, but deprioritized
     *        vesion of `options.language`
     *
     * @param {string} [options.src]
     *        A url to TextTrack cues.
     *
     * @param {boolean} [options.default]
     *        If this track should default to on or off.
     */
    function HTMLTrackElement() {
      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      classCallCheck(this, HTMLTrackElement);

      var _this = possibleConstructorReturn(this, _EventTarget.call(this));

      var readyState = void 0;

      var track = new TextTrack(options);

      _this.kind = track.kind;
      _this.src = track.src;
      _this.srclang = track.language;
      _this.label = track.label;
      _this.default = track.default;

      Object.defineProperties(_this, {

        /**
         * @memberof HTMLTrackElement
         * @member {HTMLTrackElement~ReadyState} readyState
         *         The current ready state of the track element.
         * @instance
         */
        readyState: {
          get: function get$$1() {
            return readyState;
          }
        },

        /**
         * @memberof HTMLTrackElement
         * @member {TextTrack} track
         *         The underlying TextTrack object.
         * @instance
         *
         */
        track: {
          get: function get$$1() {
            return track;
          }
        }
      });

      readyState = NONE;

      /**
       * @listens TextTrack#loadeddata
       * @fires HTMLTrackElement#load
       */
      track.addEventListener('loadeddata', function () {
        readyState = LOADED;

        _this.trigger({
          type: 'load',
          target: _this
        });
      });
      return _this;
    }

    return HTMLTrackElement;
  }(EventTarget);

  HTMLTrackElement.prototype.allowedEvents_ = {
    load: 'load'
  };

  HTMLTrackElement.NONE = NONE;
  HTMLTrackElement.LOADING = LOADING;
  HTMLTrackElement.LOADED = LOADED;
  HTMLTrackElement.ERROR = ERROR;

  /*
   * This file contains all track properties that are used in
   * player.js, tech.js, html5.js and possibly other techs in the future.
   */

  var NORMAL = {
    audio: {
      ListClass: AudioTrackList,
      TrackClass: AudioTrack,
      capitalName: 'Audio'
    },
    video: {
      ListClass: VideoTrackList,
      TrackClass: VideoTrack,
      capitalName: 'Video'
    },
    text: {
      ListClass: TextTrackList,
      TrackClass: TextTrack,
      capitalName: 'Text'
    }
  };

  Object.keys(NORMAL).forEach(function (type) {
    NORMAL[type].getterName = type + 'Tracks';
    NORMAL[type].privateName = type + 'Tracks_';
  });

  var REMOTE = {
    remoteText: {
      ListClass: TextTrackList,
      TrackClass: TextTrack,
      capitalName: 'RemoteText',
      getterName: 'remoteTextTracks',
      privateName: 'remoteTextTracks_'
    },
    remoteTextEl: {
      ListClass: HtmlTrackElementList,
      TrackClass: HTMLTrackElement,
      capitalName: 'RemoteTextTrackEls',
      getterName: 'remoteTextTrackEls',
      privateName: 'remoteTextTrackEls_'
    }
  };

  var ALL = mergeOptions(NORMAL, REMOTE);

  REMOTE.names = Object.keys(REMOTE);
  NORMAL.names = Object.keys(NORMAL);
  ALL.names = [].concat(REMOTE.names).concat(NORMAL.names);

  /**
   * Copyright 2013 vtt.js Contributors
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */

  /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
  /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
  var _objCreate = Object.create || function () {
    function F() {
    }

    return function (o) {
      if (arguments.length !== 1) {
        throw new Error('Object.create shim only accepts one parameter.');
      }
      F.prototype = o;
      return new F();
    };
  }();

  // Creates a new ParserError object from an errorData object. The errorData
  // object should have default code and message properties. The default message
  // property can be overriden by passing in a message parameter.
  // See ParsingError.Errors below for acceptable errors.
  function ParsingError(errorData, message) {
    this.name = "ParsingError";
    this.code = errorData.code;
    this.message = message || errorData.message;
  }

  ParsingError.prototype = _objCreate(Error.prototype);
  ParsingError.prototype.constructor = ParsingError;

  // ParsingError metadata for acceptable ParsingErrors.
  ParsingError.Errors = {
    BadSignature: {
      code: 0,
      message: "Malformed WebVTT signature."
    },
    BadTimeStamp: {
      code: 1,
      message: "Malformed time stamp."
    }
  };

  // Try to parse input as a time stamp.
  function parseTimeStamp(input) {

    function computeSeconds(h, m, s, f) {
      return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;
    }

    var m = input.match(/^(\d+):(\d{2})(:\d{2})?\.(\d{3})/);
    if (!m) {
      return null;
    }

    if (m[3]) {
      // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]
      return computeSeconds(m[1], m[2], m[3].replace(":", ""), m[4]);
    } else if (m[1] > 59) {
      // Timestamp takes the form of [hours]:[minutes].[milliseconds]
      // First position is hours as it's over 59.
      return computeSeconds(m[1], m[2], 0, m[4]);
    } else {
      // Timestamp takes the form of [minutes]:[seconds].[milliseconds]
      return computeSeconds(0, m[1], m[2], m[4]);
    }
  }

  // A settings object holds key/value pairs and will ignore anything but the first
  // assignment to a specific key.
  function Settings() {
    this.values = _objCreate(null);
  }

  Settings.prototype = {
    // Only accept the first assignment to any key.
    set: function set(k, v) {
      if (!this.get(k) && v !== "") {
        this.values[k] = v;
      }
    },
    // Return the value for a key, or a default value.
    // If 'defaultKey' is passed then 'dflt' is assumed to be an object with
    // a number of possible default values as properties where 'defaultKey' is
    // the key of the property that will be chosen; otherwise it's assumed to be
    // a single value.
    get: function get(k, dflt, defaultKey) {
      if (defaultKey) {
        return this.has(k) ? this.values[k] : dflt[defaultKey];
      }
      return this.has(k) ? this.values[k] : dflt;
    },
    // Check whether we have a value for a key.
    has: function has(k) {
      return k in this.values;
    },
    // Accept a setting if its one of the given alternatives.
    alt: function alt(k, v, a) {
      for (var n = 0; n < a.length; ++n) {
        if (v === a[n]) {
          this.set(k, v);
          break;
        }
      }
    },
    // Accept a setting if its a valid (signed) integer.
    integer: function integer(k, v) {
      if (/^-?\d+$/.test(v)) {
        // integer
        this.set(k, parseInt(v, 10));
      }
    },
    // Accept a setting if its a valid percentage.
    percent: function percent(k, v) {
      var m;
      if (m = v.match(/^([\d]{1,3})(\.[\d]*)?%$/)) {
        v = parseFloat(v);
        if (v >= 0 && v <= 100) {
          this.set(k, v);
          return true;
        }
      }
      return false;
    }
  };

  // Helper function to parse input into groups separated by 'groupDelim', and
  // interprete each group as a key/value pair separated by 'keyValueDelim'.
  function parseOptions(input, callback, keyValueDelim, groupDelim) {
    var groups = groupDelim ? input.split(groupDelim) : [input];
    for (var i in groups) {
      if (typeof groups[i] !== "string") {
        continue;
      }
      var kv = groups[i].split(keyValueDelim);
      if (kv.length !== 2) {
        continue;
      }
      var k = kv[0];
      var v = kv[1];
      callback(k, v);
    }
  }

  function parseCue(input, cue, regionList) {
    // Remember the original input if we need to throw an error.
    var oInput = input;

    // 4.1 WebVTT timestamp
    function consumeTimeStamp() {
      var ts = parseTimeStamp(input);
      if (ts === null) {
        throw new ParsingError(ParsingError.Errors.BadTimeStamp, "Malformed timestamp: " + oInput);
      }
      // Remove time stamp from input.
      input = input.replace(/^[^\sa-zA-Z-]+/, "");
      return ts;
    }

    // 4.4.2 WebVTT cue settings
    function consumeCueSettings(input, cue) {
      var settings = new Settings();

      parseOptions(input, function (k, v) {
        switch (k) {
          case "region":
            // Find the last region we parsed with the same region id.
            for (var i = regionList.length - 1; i >= 0; i--) {
              if (regionList[i].id === v) {
                settings.set(k, regionList[i].region);
                break;
              }
            }
            break;
          case "vertical":
            settings.alt(k, v, ["rl", "lr"]);
            break;
          case "line":
            var vals = v.split(","),
              vals0 = vals[0];
            settings.integer(k, vals0);
            settings.percent(k, vals0) ? settings.set("snapToLines", false) : null;
            settings.alt(k, vals0, ["auto"]);
            if (vals.length === 2) {
              settings.alt("lineAlign", vals[1], ["start", "middle", "end"]);
            }
            break;
          case "position":
            vals = v.split(",");
            settings.percent(k, vals[0]);
            if (vals.length === 2) {
              settings.alt("positionAlign", vals[1], ["start", "middle", "end"]);
            }
            break;
          case "size":
            settings.percent(k, v);
            break;
          case "align":
            settings.alt(k, v, ["start", "middle", "end", "left", "right"]);
            break;
        }
      }, /:/, /\s/);

      // Apply default values for any missing fields.
      cue.region = settings.get("region", null);
      cue.vertical = settings.get("vertical", "");
      cue.line = settings.get("line", "auto");
      cue.lineAlign = settings.get("lineAlign", "start");
      cue.snapToLines = settings.get("snapToLines", true);
      cue.size = settings.get("size", 100);
      cue.align = settings.get("align", "middle");
      cue.position = settings.get("position", {
        start: 0,
        left: 0,
        middle: 50,
        end: 100,
        right: 100
      }, cue.align);
      cue.positionAlign = settings.get("positionAlign", {
        start: "start",
        left: "start",
        middle: "middle",
        end: "end",
        right: "end"
      }, cue.align);
    }

    function skipWhitespace() {
      input = input.replace(/^\s+/, "");
    }

    // 4.1 WebVTT cue timings.
    skipWhitespace();
    cue.startTime = consumeTimeStamp(); // (1) collect cue start time
    skipWhitespace();
    if (input.substr(0, 3) !== "-->") {
      // (3) next characters must match "-->"
      throw new ParsingError(ParsingError.Errors.BadTimeStamp, "Malformed time stamp (time stamps must be separated by '-->'): " + oInput);
    }
    input = input.substr(3);
    skipWhitespace();
    cue.endTime = consumeTimeStamp(); // (5) collect cue end time

    // 4.1 WebVTT cue settings list.
    skipWhitespace();
    consumeCueSettings(input, cue);
  }

  var ESCAPE = {
    "&amp;": "&",
    "&lt;": "<",
    "&gt;": ">",
    "&lrm;": "\u200E",
    "&rlm;": "\u200F",
    "&nbsp;": "\xA0"
  };

  var TAG_NAME = {
    c: "span",
    i: "i",
    b: "b",
    u: "u",
    ruby: "ruby",
    rt: "rt",
    v: "span",
    lang: "span"
  };

  var TAG_ANNOTATION = {
    v: "title",
    lang: "lang"
  };

  var NEEDS_PARENT = {
    rt: "ruby"
  };

  // Parse content into a document fragment.
  function parseContent(window, input) {
    function nextToken() {
      // Check for end-of-string.
      if (!input) {
        return null;
      }

      // Consume 'n' characters from the input.
      function consume(result) {
        input = input.substr(result.length);
        return result;
      }

      var m = input.match(/^([^<]*)(<[^>]*>?)?/);
      // If there is some text before the next tag, return it, otherwise return
      // the tag.
      return consume(m[1] ? m[1] : m[2]);
    }

    // Unescape a string 's'.
    function unescape1(e) {
      return ESCAPE[e];
    }

    function unescape(s) {
      while (m = s.match(/&(amp|lt|gt|lrm|rlm|nbsp);/)) {
        s = s.replace(m[0], unescape1);
      }
      return s;
    }

    function shouldAdd(current, element) {
      return !NEEDS_PARENT[element.localName] || NEEDS_PARENT[element.localName] === current.localName;
    }

    // Create an element for this tag.
    function createElement(type, annotation) {
      var tagName = TAG_NAME[type];
      if (!tagName) {
        return null;
      }
      var element = window.document.createElement(tagName);
      element.localName = tagName;
      var name = TAG_ANNOTATION[type];
      if (name && annotation) {
        element[name] = annotation.trim();
      }
      return element;
    }

    var rootDiv = window.document.createElement("div"),
      current = rootDiv,
      t,
      tagStack = [];

    while ((t = nextToken()) !== null) {
      if (t[0] === '<') {
        if (t[1] === "/") {
          // If the closing tag matches, move back up to the parent node.
          if (tagStack.length && tagStack[tagStack.length - 1] === t.substr(2).replace(">", "")) {
            tagStack.pop();
            current = current.parentNode;
          }
          // Otherwise just ignore the end tag.
          continue;
        }
        var ts = parseTimeStamp(t.substr(1, t.length - 2));
        var node;
        if (ts) {
          // Timestamps are lead nodes as well.
          node = window.document.createProcessingInstruction("timestamp", ts);
          current.appendChild(node);
          continue;
        }
        var m = t.match(/^<([^.\s/0-9>]+)(\.[^\s\\>]+)?([^>\\]+)?(\\?)>?$/);
        // If we can't parse the tag, skip to the next tag.
        if (!m) {
          continue;
        }
        // Try to construct an element, and ignore the tag if we couldn't.
        node = createElement(m[1], m[3]);
        if (!node) {
          continue;
        }
        // Determine if the tag should be added based on the context of where it
        // is placed in the cuetext.
        if (!shouldAdd(current, node)) {
          continue;
        }
        // Set the class list (as a list of classes, separated by space).
        if (m[2]) {
          node.className = m[2].substr(1).replace('.', ' ');
        }
        // Append the node to the current node, and enter the scope of the new
        // node.
        tagStack.push(m[1]);
        current.appendChild(node);
        current = node;
        continue;
      }

      // Text nodes are leaf nodes.
      current.appendChild(window.document.createTextNode(unescape(t)));
    }

    return rootDiv;
  }

  // This is a list of all the Unicode characters that have a strong
  // right-to-left category. What this means is that these characters are
  // written right-to-left for sure. It was generated by pulling all the strong
  // right-to-left characters out of the Unicode data table. That table can
  // found at: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt
  var strongRTLRanges = [[0x5be, 0x5be], [0x5c0, 0x5c0], [0x5c3, 0x5c3], [0x5c6, 0x5c6], [0x5d0, 0x5ea], [0x5f0, 0x5f4], [0x608, 0x608], [0x60b, 0x60b], [0x60d, 0x60d], [0x61b, 0x61b], [0x61e, 0x64a], [0x66d, 0x66f], [0x671, 0x6d5], [0x6e5, 0x6e6], [0x6ee, 0x6ef], [0x6fa, 0x70d], [0x70f, 0x710], [0x712, 0x72f], [0x74d, 0x7a5], [0x7b1, 0x7b1], [0x7c0, 0x7ea], [0x7f4, 0x7f5], [0x7fa, 0x7fa], [0x800, 0x815], [0x81a, 0x81a], [0x824, 0x824], [0x828, 0x828], [0x830, 0x83e], [0x840, 0x858], [0x85e, 0x85e], [0x8a0, 0x8a0], [0x8a2, 0x8ac], [0x200f, 0x200f], [0xfb1d, 0xfb1d], [0xfb1f, 0xfb28], [0xfb2a, 0xfb36], [0xfb38, 0xfb3c], [0xfb3e, 0xfb3e], [0xfb40, 0xfb41], [0xfb43, 0xfb44], [0xfb46, 0xfbc1], [0xfbd3, 0xfd3d], [0xfd50, 0xfd8f], [0xfd92, 0xfdc7], [0xfdf0, 0xfdfc], [0xfe70, 0xfe74], [0xfe76, 0xfefc], [0x10800, 0x10805], [0x10808, 0x10808], [0x1080a, 0x10835], [0x10837, 0x10838], [0x1083c, 0x1083c], [0x1083f, 0x10855], [0x10857, 0x1085f], [0x10900, 0x1091b], [0x10920, 0x10939], [0x1093f, 0x1093f], [0x10980, 0x109b7], [0x109be, 0x109bf], [0x10a00, 0x10a00], [0x10a10, 0x10a13], [0x10a15, 0x10a17], [0x10a19, 0x10a33], [0x10a40, 0x10a47], [0x10a50, 0x10a58], [0x10a60, 0x10a7f], [0x10b00, 0x10b35], [0x10b40, 0x10b55], [0x10b58, 0x10b72], [0x10b78, 0x10b7f], [0x10c00, 0x10c48], [0x1ee00, 0x1ee03], [0x1ee05, 0x1ee1f], [0x1ee21, 0x1ee22], [0x1ee24, 0x1ee24], [0x1ee27, 0x1ee27], [0x1ee29, 0x1ee32], [0x1ee34, 0x1ee37], [0x1ee39, 0x1ee39], [0x1ee3b, 0x1ee3b], [0x1ee42, 0x1ee42], [0x1ee47, 0x1ee47], [0x1ee49, 0x1ee49], [0x1ee4b, 0x1ee4b], [0x1ee4d, 0x1ee4f], [0x1ee51, 0x1ee52], [0x1ee54, 0x1ee54], [0x1ee57, 0x1ee57], [0x1ee59, 0x1ee59], [0x1ee5b, 0x1ee5b], [0x1ee5d, 0x1ee5d], [0x1ee5f, 0x1ee5f], [0x1ee61, 0x1ee62], [0x1ee64, 0x1ee64], [0x1ee67, 0x1ee6a], [0x1ee6c, 0x1ee72], [0x1ee74, 0x1ee77], [0x1ee79, 0x1ee7c], [0x1ee7e, 0x1ee7e], [0x1ee80, 0x1ee89], [0x1ee8b, 0x1ee9b], [0x1eea1, 0x1eea3], [0x1eea5, 0x1eea9], [0x1eeab, 0x1eebb], [0x10fffd, 0x10fffd]];

  function isStrongRTLChar(charCode) {
    for (var i = 0; i < strongRTLRanges.length; i++) {
      var currentRange = strongRTLRanges[i];
      if (charCode >= currentRange[0] && charCode <= currentRange[1]) {
        return true;
      }
    }

    return false;
  }

  function determineBidi(cueDiv) {
    var nodeStack = [],
      text = "",
      charCode;

    if (!cueDiv || !cueDiv.childNodes) {
      return "ltr";
    }

    function pushNodes(nodeStack, node) {
      for (var i = node.childNodes.length - 1; i >= 0; i--) {
        nodeStack.push(node.childNodes[i]);
      }
    }

    function nextTextNode(nodeStack) {
      if (!nodeStack || !nodeStack.length) {
        return null;
      }

      var node = nodeStack.pop(),
        text = node.textContent || node.innerText;
      if (text) {
        // TODO: This should match all unicode type B characters (paragraph
        // separator characters). See issue #115.
        var m = text.match(/^.*(\n|\r)/);
        if (m) {
          nodeStack.length = 0;
          return m[0];
        }
        return text;
      }
      if (node.tagName === "ruby") {
        return nextTextNode(nodeStack);
      }
      if (node.childNodes) {
        pushNodes(nodeStack, node);
        return nextTextNode(nodeStack);
      }
    }

    pushNodes(nodeStack, cueDiv);
    while (text = nextTextNode(nodeStack)) {
      for (var i = 0; i < text.length; i++) {
        charCode = text.charCodeAt(i);
        if (isStrongRTLChar(charCode)) {
          return "rtl";
        }
      }
    }
    return "ltr";
  }

  function computeLinePos(cue) {
    if (typeof cue.line === "number" && (cue.snapToLines || cue.line >= 0 && cue.line <= 100)) {
      return cue.line;
    }
    if (!cue.track || !cue.track.textTrackList || !cue.track.textTrackList.mediaElement) {
      return -1;
    }
    var track = cue.track,
      trackList = track.textTrackList,
      count = 0;
    for (var i = 0; i < trackList.length && trackList[i] !== track; i++) {
      if (trackList[i].mode === "showing") {
        count++;
      }
    }
    return ++count * -1;
  }

  function StyleBox() {
  }

  // Apply styles to a div. If there is no div passed then it defaults to the
  // div on 'this'.
  StyleBox.prototype.applyStyles = function (styles, div) {
    div = div || this.div;
    for (var prop in styles) {
      if (styles.hasOwnProperty(prop)) {
        div.style[prop] = styles[prop];
      }
    }
  };

  StyleBox.prototype.formatStyle = function (val, unit) {
    return val === 0 ? 0 : val + unit;
  };

  // Constructs the computed display state of the cue (a div). Places the div
  // into the overlay which should be a block level element (usually a div).
  function CueStyleBox(window, cue, styleOptions) {
    StyleBox.call(this);
    this.cue = cue;

    // Parse our cue's text into a DOM tree rooted at 'cueDiv'. This div will
    // have inline positioning and will function as the cue background box.
    this.cueDiv = parseContent(window, cue.text);
    var styles = {
      color: "rgba(255, 255, 255, 1)",
      backgroundColor: "rgba(0, 0, 0, 0.8)",
      position: "relative",
      left: 0,
      right: 0,
      top: 0,
      bottom: 0,
      display: "inline",
      writingMode: cue.vertical === "" ? "horizontal-tb" : cue.vertical === "lr" ? "vertical-lr" : "vertical-rl",
      unicodeBidi: "plaintext"
    };

    this.applyStyles(styles, this.cueDiv);

    // Create an absolutely positioned div that will be used to position the cue
    // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS
    // mirrors of them except "middle" which is "center" in CSS.
    this.div = window.document.createElement("div");
    styles = {
      direction: determineBidi(this.cueDiv),
      writingMode: cue.vertical === "" ? "horizontal-tb" : cue.vertical === "lr" ? "vertical-lr" : "vertical-rl",
      unicodeBidi: "plaintext",
      textAlign: cue.align === "middle" ? "center" : cue.align,
      font: styleOptions.font,
      whiteSpace: "pre-line",
      position: "absolute"
    };

    this.applyStyles(styles);
    this.div.appendChild(this.cueDiv);

    // Calculate the distance from the reference edge of the viewport to the text
    // position of the cue box. The reference edge will be resolved later when
    // the box orientation styles are applied.
    var textPos = 0;
    switch (cue.positionAlign) {
      case "start":
        textPos = cue.position;
        break;
      case "middle":
        textPos = cue.position - cue.size / 2;
        break;
      case "end":
        textPos = cue.position - cue.size;
        break;
    }

    // Horizontal box orientation; textPos is the distance from the left edge of the
    // area to the left edge of the box and cue.size is the distance extending to
    // the right from there.
    if (cue.vertical === "") {
      this.applyStyles({
        left: this.formatStyle(textPos, "%"),
        width: this.formatStyle(cue.size, "%")
      });
      // Vertical box orientation; textPos is the distance from the top edge of the
      // area to the top edge of the box and cue.size is the height extending
      // downwards from there.
    } else {
      this.applyStyles({
        top: this.formatStyle(textPos, "%"),
        height: this.formatStyle(cue.size, "%")
      });
    }

    this.move = function (box) {
      this.applyStyles({
        top: this.formatStyle(box.top, "px"),
        bottom: this.formatStyle(box.bottom, "px"),
        left: this.formatStyle(box.left, "px"),
        right: this.formatStyle(box.right, "px"),
        height: this.formatStyle(box.height, "px"),
        width: this.formatStyle(box.width, "px")
      });
    };
  }

  CueStyleBox.prototype = _objCreate(StyleBox.prototype);
  CueStyleBox.prototype.constructor = CueStyleBox;

  // Represents the co-ordinates of an Element in a way that we can easily
  // compute things with such as if it overlaps or intersects with another Element.
  // Can initialize it with either a StyleBox or another BoxPosition.
  function BoxPosition(obj) {
    // Either a BoxPosition was passed in and we need to copy it, or a StyleBox
    // was passed in and we need to copy the results of 'getBoundingClientRect'
    // as the object returned is readonly. All co-ordinate values are in reference
    // to the viewport origin (top left).
    var lh, height, width, top;
    if (obj.div) {
      height = obj.div.offsetHeight;
      width = obj.div.offsetWidth;
      top = obj.div.offsetTop;

      var rects = (rects = obj.div.childNodes) && (rects = rects[0]) && rects.getClientRects && rects.getClientRects();
      obj = obj.div.getBoundingClientRect();
      // In certain cases the outter div will be slightly larger then the sum of
      // the inner div's lines. This could be due to bold text, etc, on some platforms.
      // In this case we should get the average line height and use that. This will
      // result in the desired behaviour.
      lh = rects ? Math.max(rects[0] && rects[0].height || 0, obj.height / rects.length) : 0;
    }
    this.left = obj.left;
    this.right = obj.right;
    this.top = obj.top || top;
    this.height = obj.height || height;
    this.bottom = obj.bottom || top + (obj.height || height);
    this.width = obj.width || width;
    this.lineHeight = lh !== undefined ? lh : obj.lineHeight;
  }

  // Move the box along a particular axis. Optionally pass in an amount to move
  // the box. If no amount is passed then the default is the line height of the
  // box.
  BoxPosition.prototype.move = function (axis, toMove) {
    toMove = toMove !== undefined ? toMove : this.lineHeight;
    switch (axis) {
      case "+x":
        this.left += toMove;
        this.right += toMove;
        break;
      case "-x":
        this.left -= toMove;
        this.right -= toMove;
        break;
      case "+y":
        this.top += toMove;
        this.bottom += toMove;
        break;
      case "-y":
        this.top -= toMove;
        this.bottom -= toMove;
        break;
    }
  };

  // Check if this box overlaps another box, b2.
  BoxPosition.prototype.overlaps = function (b2) {
    return this.left < b2.right && this.right > b2.left && this.top < b2.bottom && this.bottom > b2.top;
  };

  // Check if this box overlaps any other boxes in boxes.
  BoxPosition.prototype.overlapsAny = function (boxes) {
    for (var i = 0; i < boxes.length; i++) {
      if (this.overlaps(boxes[i])) {
        return true;
      }
    }
    return false;
  };

  // Check if this box is within another box.
  BoxPosition.prototype.within = function (container) {
    return this.top >= container.top && this.bottom <= container.bottom && this.left >= container.left && this.right <= container.right;
  };

  // Check if this box is entirely within the container or it is overlapping
  // on the edge opposite of the axis direction passed. For example, if "+x" is
  // passed and the box is overlapping on the left edge of the container, then
  // return true.
  BoxPosition.prototype.overlapsOppositeAxis = function (container, axis) {
    switch (axis) {
      case "+x":
        return this.left < container.left;
      case "-x":
        return this.right > container.right;
      case "+y":
        return this.top < container.top;
      case "-y":
        return this.bottom > container.bottom;
    }
  };

  // Find the percentage of the area that this box is overlapping with another
  // box.
  BoxPosition.prototype.intersectPercentage = function (b2) {
    var x = Math.max(0, Math.min(this.right, b2.right) - Math.max(this.left, b2.left)),
      y = Math.max(0, Math.min(this.bottom, b2.bottom) - Math.max(this.top, b2.top)),
      intersectArea = x * y;
    return intersectArea / (this.height * this.width);
  };

  // Convert the positions from this box to CSS compatible positions using
  // the reference container's positions. This has to be done because this
  // box's positions are in reference to the viewport origin, whereas, CSS
  // values are in referecne to their respective edges.
  BoxPosition.prototype.toCSSCompatValues = function (reference) {
    return {
      top: this.top - reference.top,
      bottom: reference.bottom - this.bottom,
      left: this.left - reference.left,
      right: reference.right - this.right,
      height: this.height,
      width: this.width
    };
  };

  // Get an object that represents the box's position without anything extra.
  // Can pass a StyleBox, HTMLElement, or another BoxPositon.
  BoxPosition.getSimpleBoxPosition = function (obj) {
    var height = obj.div ? obj.div.offsetHeight : obj.tagName ? obj.offsetHeight : 0;
    var width = obj.div ? obj.div.offsetWidth : obj.tagName ? obj.offsetWidth : 0;
    var top = obj.div ? obj.div.offsetTop : obj.tagName ? obj.offsetTop : 0;

    obj = obj.div ? obj.div.getBoundingClientRect() : obj.tagName ? obj.getBoundingClientRect() : obj;
    var ret = {
      left: obj.left,
      right: obj.right,
      top: obj.top || top,
      height: obj.height || height,
      bottom: obj.bottom || top + (obj.height || height),
      width: obj.width || width
    };
    return ret;
  };

  // Move a StyleBox to its specified, or next best, position. The containerBox
  // is the box that contains the StyleBox, such as a div. boxPositions are
  // a list of other boxes that the styleBox can't overlap with.
  function moveBoxToLinePosition(window, styleBox, containerBox, boxPositions) {

    // Find the best position for a cue box, b, on the video. The axis parameter
    // is a list of axis, the order of which, it will move the box along. For example:
    // Passing ["+x", "-x"] will move the box first along the x axis in the positive
    // direction. If it doesn't find a good position for it there it will then move
    // it along the x axis in the negative direction.
    function findBestPosition(b, axis) {
      var bestPosition,
        specifiedPosition = new BoxPosition(b),
        percentage = 1; // Highest possible so the first thing we get is better.

      for (var i = 0; i < axis.length; i++) {
        while (b.overlapsOppositeAxis(containerBox, axis[i]) || b.within(containerBox) && b.overlapsAny(boxPositions)) {
          b.move(axis[i]);
        }
        // We found a spot where we aren't overlapping anything. This is our
        // best position.
        if (b.within(containerBox)) {
          return b;
        }
        var p = b.intersectPercentage(containerBox);
        // If we're outside the container box less then we were on our last try
        // then remember this position as the best position.
        if (percentage > p) {
          bestPosition = new BoxPosition(b);
          percentage = p;
        }
        // Reset the box position to the specified position.
        b = new BoxPosition(specifiedPosition);
      }
      return bestPosition || specifiedPosition;
    }

    var boxPosition = new BoxPosition(styleBox),
      cue = styleBox.cue,
      linePos = computeLinePos(cue),
      axis = [];

    // If we have a line number to align the cue to.
    if (cue.snapToLines) {
      var size;
      switch (cue.vertical) {
        case "":
          axis = ["+y", "-y"];
          size = "height";
          break;
        case "rl":
          axis = ["+x", "-x"];
          size = "width";
          break;
        case "lr":
          axis = ["-x", "+x"];
          size = "width";
          break;
      }

      var step = boxPosition.lineHeight,
        position = step * Math.round(linePos),
        maxPosition = containerBox[size] + step,
        initialAxis = axis[0];

      // If the specified intial position is greater then the max position then
      // clamp the box to the amount of steps it would take for the box to
      // reach the max position.
      if (Math.abs(position) > maxPosition) {
        position = position < 0 ? -1 : 1;
        position *= Math.ceil(maxPosition / step) * step;
      }

      // If computed line position returns negative then line numbers are
      // relative to the bottom of the video instead of the top. Therefore, we
      // need to increase our initial position by the length or width of the
      // video, depending on the writing direction, and reverse our axis directions.
      if (linePos < 0) {
        position += cue.vertical === "" ? containerBox.height : containerBox.width;
        axis = axis.reverse();
      }

      // Move the box to the specified position. This may not be its best
      // position.
      boxPosition.move(initialAxis, position);
    } else {
      // If we have a percentage line value for the cue.
      var calculatedPercentage = boxPosition.lineHeight / containerBox.height * 100;

      switch (cue.lineAlign) {
        case "middle":
          linePos -= calculatedPercentage / 2;
          break;
        case "end":
          linePos -= calculatedPercentage;
          break;
      }

      // Apply initial line position to the cue box.
      switch (cue.vertical) {
        case "":
          styleBox.applyStyles({
            top: styleBox.formatStyle(linePos, "%")
          });
          break;
        case "rl":
          styleBox.applyStyles({
            left: styleBox.formatStyle(linePos, "%")
          });
          break;
        case "lr":
          styleBox.applyStyles({
            right: styleBox.formatStyle(linePos, "%")
          });
          break;
      }

      axis = ["+y", "-x", "+x", "-y"];

      // Get the box position again after we've applied the specified positioning
      // to it.
      boxPosition = new BoxPosition(styleBox);
    }

    var bestPosition = findBestPosition(boxPosition, axis);
    styleBox.move(bestPosition.toCSSCompatValues(containerBox));
  }

  function WebVTT$1() {
  }

  // Nothing


  // Helper to allow strings to be decoded instead of the default binary utf8 data.
  WebVTT$1.StringDecoder = function () {
    return {
      decode: function decode(data) {
        if (!data) {
          return "";
        }
        if (typeof data !== "string") {
          throw new Error("Error - expected string data.");
        }
        return decodeURIComponent(encodeURIComponent(data));
      }
    };
  };

  WebVTT$1.convertCueToDOMTree = function (window, cuetext) {
    if (!window || !cuetext) {
      return null;
    }
    return parseContent(window, cuetext);
  };

  var FONT_SIZE_PERCENT = 0.05;
  var FONT_STYLE = "sans-serif";
  var CUE_BACKGROUND_PADDING = "1.5%";

  // Runs the processing model over the cues and regions passed to it.
  // @param overlay A block level element (usually a div) that the computed cues
  //                and regions will be placed into.
  WebVTT$1.processCues = function (window, cues, overlay) {
    if (!window || !cues || !overlay) {
      return null;
    }

    // Remove all previous children.
    while (overlay.firstChild) {
      overlay.removeChild(overlay.firstChild);
    }

    var paddedOverlay = window.document.createElement("div");
    paddedOverlay.style.position = "absolute";
    paddedOverlay.style.left = "0";
    paddedOverlay.style.right = "0";
    paddedOverlay.style.top = "0";
    paddedOverlay.style.bottom = "0";
    paddedOverlay.style.margin = CUE_BACKGROUND_PADDING;
    overlay.appendChild(paddedOverlay);

    // Determine if we need to compute the display states of the cues. This could
    // be the case if a cue's state has been changed since the last computation or
    // if it has not been computed yet.
    function shouldCompute(cues) {
      for (var i = 0; i < cues.length; i++) {
        if (cues[i].hasBeenReset || !cues[i].displayState) {
          return true;
        }
      }
      return false;
    }

    // We don't need to recompute the cues' display states. Just reuse them.
    if (!shouldCompute(cues)) {
      for (var i = 0; i < cues.length; i++) {
        paddedOverlay.appendChild(cues[i].displayState);
      }
      return;
    }

    var boxPositions = [],
      containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),
      fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;
    var styleOptions = {
      font: fontSize + "px " + FONT_STYLE
    };

    (function () {
      var styleBox, cue;

      for (var i = 0; i < cues.length; i++) {
        cue = cues[i];

        // Compute the intial position and styles of the cue div.
        styleBox = new CueStyleBox(window, cue, styleOptions);
        paddedOverlay.appendChild(styleBox.div);

        // Move the cue div to it's correct line position.
        moveBoxToLinePosition(window, styleBox, containerBox, boxPositions);

        // Remember the computed div so that we don't have to recompute it later
        // if we don't have too.
        cue.displayState = styleBox.div;

        boxPositions.push(BoxPosition.getSimpleBoxPosition(styleBox));
      }
    })();
  };

  WebVTT$1.Parser = function (window, vttjs, decoder) {
    if (!decoder) {
      decoder = vttjs;
      vttjs = {};
    }
    if (!vttjs) {
      vttjs = {};
    }

    this.window = window;
    this.vttjs = vttjs;
    this.state = "INITIAL";
    this.buffer = "";
    this.decoder = decoder || new TextDecoder("utf8");
    this.regionList = [];
  };

  WebVTT$1.Parser.prototype = {
    // If the error is a ParsingError then report it to the consumer if
    // possible. If it's not a ParsingError then throw it like normal.
    reportOrThrowError: function reportOrThrowError(e) {
      if (e instanceof ParsingError) {
        this.onparsingerror && this.onparsingerror(e);
      } else {
        throw e;
      }
    },
    parse: function parse(data) {
      var self = this;

      // If there is no data then we won't decode it, but will just try to parse
      // whatever is in buffer already. This may occur in circumstances, for
      // example when flush() is called.
      if (data) {
        // Try to decode the data that we received.
        self.buffer += self.decoder.decode(data, {stream: true});
      }

      function collectNextLine() {
        var buffer = self.buffer;
        var pos = 0;
        while (pos < buffer.length && buffer[pos] !== '\r' && buffer[pos] !== '\n') {
          ++pos;
        }
        var line = buffer.substr(0, pos);
        // Advance the buffer early in case we fail below.
        if (buffer[pos] === '\r') {
          ++pos;
        }
        if (buffer[pos] === '\n') {
          ++pos;
        }
        self.buffer = buffer.substr(pos);
        return line;
      }

      // 3.4 WebVTT region and WebVTT region settings syntax
      function parseRegion(input) {
        var settings = new Settings();

        parseOptions(input, function (k, v) {
          switch (k) {
            case "id":
              settings.set(k, v);
              break;
            case "width":
              settings.percent(k, v);
              break;
            case "lines":
              settings.integer(k, v);
              break;
            case "regionanchor":
            case "viewportanchor":
              var xy = v.split(',');
              if (xy.length !== 2) {
                break;
              }
              // We have to make sure both x and y parse, so use a temporary
              // settings object here.
              var anchor = new Settings();
              anchor.percent("x", xy[0]);
              anchor.percent("y", xy[1]);
              if (!anchor.has("x") || !anchor.has("y")) {
                break;
              }
              settings.set(k + "X", anchor.get("x"));
              settings.set(k + "Y", anchor.get("y"));
              break;
            case "scroll":
              settings.alt(k, v, ["up"]);
              break;
          }
        }, /=/, /\s/);

        // Create the region, using default values for any values that were not
        // specified.
        if (settings.has("id")) {
          var region = new (self.vttjs.VTTRegion || self.window.VTTRegion)();
          region.width = settings.get("width", 100);
          region.lines = settings.get("lines", 3);
          region.regionAnchorX = settings.get("regionanchorX", 0);
          region.regionAnchorY = settings.get("regionanchorY", 100);
          region.viewportAnchorX = settings.get("viewportanchorX", 0);
          region.viewportAnchorY = settings.get("viewportanchorY", 100);
          region.scroll = settings.get("scroll", "");
          // Register the region.
          self.onregion && self.onregion(region);
          // Remember the VTTRegion for later in case we parse any VTTCues that
          // reference it.
          self.regionList.push({
            id: settings.get("id"),
            region: region
          });
        }
      }

      // draft-pantos-http-live-streaming-20
      // https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-3.5
      // 3.5 WebVTT
      function parseTimestampMap(input) {
        var settings = new Settings();

        parseOptions(input, function (k, v) {
          switch (k) {
            case "MPEGT":
              settings.integer(k + 'S', v);
              break;
            case "LOCA":
              settings.set(k + 'L', parseTimeStamp(v));
              break;
          }
        }, /[^\d]:/, /,/);

        self.ontimestampmap && self.ontimestampmap({
          "MPEGTS": settings.get("MPEGTS"),
          "LOCAL": settings.get("LOCAL")
        });
      }

      // 3.2 WebVTT metadata header syntax
      function parseHeader(input) {
        if (input.match(/X-TIMESTAMP-MAP/)) {
          // This line contains HLS X-TIMESTAMP-MAP metadata
          parseOptions(input, function (k, v) {
            switch (k) {
              case "X-TIMESTAMP-MAP":
                parseTimestampMap(v);
                break;
            }
          }, /=/);
        } else {
          parseOptions(input, function (k, v) {
            switch (k) {
              case "Region":
                // 3.3 WebVTT region metadata header syntax
                parseRegion(v);
                break;
            }
          }, /:/);
        }
      }

      // 5.1 WebVTT file parsing.
      try {
        var line;
        if (self.state === "INITIAL") {
          // We can't start parsing until we have the first line.
          if (!/\r\n|\n/.test(self.buffer)) {
            return this;
          }

          line = collectNextLine();

          var m = line.match(/^WEBVTT([ \t].*)?$/);
          if (!m || !m[0]) {
            throw new ParsingError(ParsingError.Errors.BadSignature);
          }

          self.state = "HEADER";
        }

        var alreadyCollectedLine = false;
        while (self.buffer) {
          // We can't parse a line until we have the full line.
          if (!/\r\n|\n/.test(self.buffer)) {
            return this;
          }

          if (!alreadyCollectedLine) {
            line = collectNextLine();
          } else {
            alreadyCollectedLine = false;
          }

          switch (self.state) {
            case "HEADER":
              // 13-18 - Allow a header (metadata) under the WEBVTT line.
              if (/:/.test(line)) {
                parseHeader(line);
              } else if (!line) {
                // An empty line terminates the header and starts the body (cues).
                self.state = "ID";
              }
              continue;
            case "NOTE":
              // Ignore NOTE blocks.
              if (!line) {
                self.state = "ID";
              }
              continue;
            case "ID":
              // Check for the start of NOTE blocks.
              if (/^NOTE($|[ \t])/.test(line)) {
                self.state = "NOTE";
                break;
              }
              // 19-29 - Allow any number of line terminators, then initialize new cue values.
              if (!line) {
                continue;
              }
              self.cue = new (self.vttjs.VTTCue || self.window.VTTCue)(0, 0, "");
              self.state = "CUE";
              // 30-39 - Check if self line contains an optional identifier or timing data.
              if (line.indexOf("-->") === -1) {
                self.cue.id = line;
                continue;
              }
            // Process line as start of a cue.
            /*falls through*/
            case "CUE":
              // 40 - Collect cue timings and settings.
              try {
                parseCue(line, self.cue, self.regionList);
              } catch (e) {
                self.reportOrThrowError(e);
                // In case of an error ignore rest of the cue.
                self.cue = null;
                self.state = "BADCUE";
                continue;
              }
              self.state = "CUETEXT";
              continue;
            case "CUETEXT":
              var hasSubstring = line.indexOf("-->") !== -1;
              // 34 - If we have an empty line then report the cue.
              // 35 - If we have the special substring '-->' then report the cue,
              // but do not collect the line as we need to process the current
              // one as a new cue.
              if (!line || hasSubstring && (alreadyCollectedLine = true)) {
                // We are done parsing self cue.
                self.oncue && self.oncue(self.cue);
                self.cue = null;
                self.state = "ID";
                continue;
              }
              if (self.cue.text) {
                self.cue.text += "\n";
              }
              self.cue.text += line;
              continue;
            case "BADCUE":
              // BADCUE
              // 54-62 - Collect and discard the remaining cue.
              if (!line) {
                self.state = "ID";
              }
              continue;
          }
        }
      } catch (e) {
        self.reportOrThrowError(e);

        // If we are currently parsing a cue, report what we have.
        if (self.state === "CUETEXT" && self.cue && self.oncue) {
          self.oncue(self.cue);
        }
        self.cue = null;
        // Enter BADWEBVTT state if header was not parsed correctly otherwise
        // another exception occurred so enter BADCUE state.
        self.state = self.state === "INITIAL" ? "BADWEBVTT" : "BADCUE";
      }
      return this;
    },
    flush: function flush() {
      var self = this;
      try {
        // Finish decoding the stream.
        self.buffer += self.decoder.decode();
        // Synthesize the end of the current cue or region.
        if (self.cue || self.state === "HEADER") {
          self.buffer += "\n\n";
          self.parse();
        }
        // If we've flushed, parsed, and we're still on the INITIAL state then
        // that means we don't have enough of the stream to parse the first
        // line.
        if (self.state === "INITIAL") {
          throw new ParsingError(ParsingError.Errors.BadSignature);
        }
      } catch (e) {
        self.reportOrThrowError(e);
      }
      self.onflush && self.onflush();
      return this;
    }
  };

  var vtt = WebVTT$1;

  var vtt$1 = /*#__PURE__*/Object.freeze({
    default: vtt,
    __moduleExports: vtt
  });

  /**
   * Copyright 2013 vtt.js Contributors
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */

  var autoKeyword = "auto";
  var directionSetting = {
    "": 1,
    "lr": 1,
    "rl": 1
  };
  var alignSetting = {
    "start": 1,
    "middle": 1,
    "end": 1,
    "left": 1,
    "right": 1
  };

  function findDirectionSetting(value) {
    if (typeof value !== "string") {
      return false;
    }
    var dir = directionSetting[value.toLowerCase()];
    return dir ? value.toLowerCase() : false;
  }

  function findAlignSetting(value) {
    if (typeof value !== "string") {
      return false;
    }
    var align = alignSetting[value.toLowerCase()];
    return align ? value.toLowerCase() : false;
  }

  function VTTCue(startTime, endTime, text) {
    /**
     * Shim implementation specific properties. These properties are not in
     * the spec.
     */

    // Lets us know when the VTTCue's data has changed in such a way that we need
    // to recompute its display state. This lets us compute its display state
    // lazily.
    this.hasBeenReset = false;

    /**
     * VTTCue and TextTrackCue properties
     * http://dev.w3.org/html5/webvtt/#vttcue-interface
     */

    var _id = "";
    var _pauseOnExit = false;
    var _startTime = startTime;
    var _endTime = endTime;
    var _text = text;
    var _region = null;
    var _vertical = "";
    var _snapToLines = true;
    var _line = "auto";
    var _lineAlign = "start";
    var _position = 50;
    var _positionAlign = "middle";
    var _size = 50;
    var _align = "middle";

    Object.defineProperties(this, {
      "id": {
        enumerable: true,
        get: function get() {
          return _id;
        },
        set: function set(value) {
          _id = "" + value;
        }
      },

      "pauseOnExit": {
        enumerable: true,
        get: function get() {
          return _pauseOnExit;
        },
        set: function set(value) {
          _pauseOnExit = !!value;
        }
      },

      "startTime": {
        enumerable: true,
        get: function get() {
          return _startTime;
        },
        set: function set(value) {
          if (typeof value !== "number") {
            throw new TypeError("Start time must be set to a number.");
          }
          _startTime = value;
          this.hasBeenReset = true;
        }
      },

      "endTime": {
        enumerable: true,
        get: function get() {
          return _endTime;
        },
        set: function set(value) {
          if (typeof value !== "number") {
            throw new TypeError("End time must be set to a number.");
          }
          _endTime = value;
          this.hasBeenReset = true;
        }
      },

      "text": {
        enumerable: true,
        get: function get() {
          return _text;
        },
        set: function set(value) {
          _text = "" + value;
          this.hasBeenReset = true;
        }
      },

      "region": {
        enumerable: true,
        get: function get() {
          return _region;
        },
        set: function set(value) {
          _region = value;
          this.hasBeenReset = true;
        }
      },

      "vertical": {
        enumerable: true,
        get: function get() {
          return _vertical;
        },
        set: function set(value) {
          var setting = findDirectionSetting(value);
          // Have to check for false because the setting an be an empty string.
          if (setting === false) {
            throw new SyntaxError("An invalid or illegal string was specified.");
          }
          _vertical = setting;
          this.hasBeenReset = true;
        }
      },

      "snapToLines": {
        enumerable: true,
        get: function get() {
          return _snapToLines;
        },
        set: function set(value) {
          _snapToLines = !!value;
          this.hasBeenReset = true;
        }
      },

      "line": {
        enumerable: true,
        get: function get() {
          return _line;
        },
        set: function set(value) {
          if (typeof value !== "number" && value !== autoKeyword) {
            throw new SyntaxError("An invalid number or illegal string was specified.");
          }
          _line = value;
          this.hasBeenReset = true;
        }
      },

      "lineAlign": {
        enumerable: true,
        get: function get() {
          return _lineAlign;
        },
        set: function set(value) {
          var setting = findAlignSetting(value);
          if (!setting) {
            throw new SyntaxError("An invalid or illegal string was specified.");
          }
          _lineAlign = setting;
          this.hasBeenReset = true;
        }
      },

      "position": {
        enumerable: true,
        get: function get() {
          return _position;
        },
        set: function set(value) {
          if (value < 0 || value > 100) {
            throw new Error("Position must be between 0 and 100.");
          }
          _position = value;
          this.hasBeenReset = true;
        }
      },

      "positionAlign": {
        enumerable: true,
        get: function get() {
          return _positionAlign;
        },
        set: function set(value) {
          var setting = findAlignSetting(value);
          if (!setting) {
            throw new SyntaxError("An invalid or illegal string was specified.");
          }
          _positionAlign = setting;
          this.hasBeenReset = true;
        }
      },

      "size": {
        enumerable: true,
        get: function get() {
          return _size;
        },
        set: function set(value) {
          if (value < 0 || value > 100) {
            throw new Error("Size must be between 0 and 100.");
          }
          _size = value;
          this.hasBeenReset = true;
        }
      },

      "align": {
        enumerable: true,
        get: function get() {
          return _align;
        },
        set: function set(value) {
          var setting = findAlignSetting(value);
          if (!setting) {
            throw new SyntaxError("An invalid or illegal string was specified.");
          }
          _align = setting;
          this.hasBeenReset = true;
        }
      }
    });

    /**
     * Other <track> spec defined properties
     */

    // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state
    this.displayState = undefined;
  }

  /**
   * VTTCue methods
   */

  VTTCue.prototype.getCueAsHTML = function () {
    // Assume WebVTT.convertCueToDOMTree is on the global.
    return WebVTT.convertCueToDOMTree(window, this.text);
  };

  var vttcue = VTTCue;

  var vttcue$1 = /*#__PURE__*/Object.freeze({
    default: vttcue,
    __moduleExports: vttcue
  });

  /**
   * Copyright 2013 vtt.js Contributors
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */

  var scrollSetting = {
    "": true,
    "up": true
  };

  function findScrollSetting(value) {
    if (typeof value !== "string") {
      return false;
    }
    var scroll = scrollSetting[value.toLowerCase()];
    return scroll ? value.toLowerCase() : false;
  }

  function isValidPercentValue(value) {
    return typeof value === "number" && value >= 0 && value <= 100;
  }

  // VTTRegion shim http://dev.w3.org/html5/webvtt/#vttregion-interface
  function VTTRegion() {
    var _width = 100;
    var _lines = 3;
    var _regionAnchorX = 0;
    var _regionAnchorY = 100;
    var _viewportAnchorX = 0;
    var _viewportAnchorY = 100;
    var _scroll = "";

    Object.defineProperties(this, {
      "width": {
        enumerable: true,
        get: function get() {
          return _width;
        },
        set: function set(value) {
          if (!isValidPercentValue(value)) {
            throw new Error("Width must be between 0 and 100.");
          }
          _width = value;
        }
      },
      "lines": {
        enumerable: true,
        get: function get() {
          return _lines;
        },
        set: function set(value) {
          if (typeof value !== "number") {
            throw new TypeError("Lines must be set to a number.");
          }
          _lines = value;
        }
      },
      "regionAnchorY": {
        enumerable: true,
        get: function get() {
          return _regionAnchorY;
        },
        set: function set(value) {
          if (!isValidPercentValue(value)) {
            throw new Error("RegionAnchorX must be between 0 and 100.");
          }
          _regionAnchorY = value;
        }
      },
      "regionAnchorX": {
        enumerable: true,
        get: function get() {
          return _regionAnchorX;
        },
        set: function set(value) {
          if (!isValidPercentValue(value)) {
            throw new Error("RegionAnchorY must be between 0 and 100.");
          }
          _regionAnchorX = value;
        }
      },
      "viewportAnchorY": {
        enumerable: true,
        get: function get() {
          return _viewportAnchorY;
        },
        set: function set(value) {
          if (!isValidPercentValue(value)) {
            throw new Error("ViewportAnchorY must be between 0 and 100.");
          }
          _viewportAnchorY = value;
        }
      },
      "viewportAnchorX": {
        enumerable: true,
        get: function get() {
          return _viewportAnchorX;
        },
        set: function set(value) {
          if (!isValidPercentValue(value)) {
            throw new Error("ViewportAnchorX must be between 0 and 100.");
          }
          _viewportAnchorX = value;
        }
      },
      "scroll": {
        enumerable: true,
        get: function get() {
          return _scroll;
        },
        set: function set(value) {
          var setting = findScrollSetting(value);
          // Have to check for false as an empty string is a legal value.
          if (setting === false) {
            throw new SyntaxError("An invalid or illegal string was specified.");
          }
          _scroll = setting;
        }
      }
    });
  }

  var vttregion = VTTRegion;

  var vttregion$1 = /*#__PURE__*/Object.freeze({
    default: vttregion,
    __moduleExports: vttregion
  });

  var require$$0 = (vtt$1 && vtt) || vtt$1;

  var require$$1 = (vttcue$1 && vttcue) || vttcue$1;

  var require$$2 = (vttregion$1 && vttregion) || vttregion$1;

  var browserIndex = createCommonjsModule(function (module) {
    /**
     * Copyright 2013 vtt.js Contributors
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *   http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */

      // Default exports for Node. Export the extended versions of VTTCue and
      // VTTRegion in Node since we likely want the capability to convert back and
      // forth between JSON. If we don't then it's not that big of a deal since we're
      // off browser.


    var vttjs = module.exports = {
        WebVTT: require$$0,
        VTTCue: require$$1,
        VTTRegion: require$$2
      };

    window_1.vttjs = vttjs;
    window_1.WebVTT = vttjs.WebVTT;

    var cueShim = vttjs.VTTCue;
    var regionShim = vttjs.VTTRegion;
    var nativeVTTCue = window_1.VTTCue;
    var nativeVTTRegion = window_1.VTTRegion;

    vttjs.shim = function () {
      window_1.VTTCue = cueShim;
      window_1.VTTRegion = regionShim;
    };

    vttjs.restore = function () {
      window_1.VTTCue = nativeVTTCue;
      window_1.VTTRegion = nativeVTTRegion;
    };

    if (!window_1.VTTCue) {
      vttjs.shim();
    }
  });
  var browserIndex_1 = browserIndex.WebVTT;
  var browserIndex_2 = browserIndex.VTTCue;
  var browserIndex_3 = browserIndex.VTTRegion;

  /**
   * @file tech.js
   */

  /**
   * An Object containing a structure like: `{src: 'url', type: 'mimetype'}` or string
   * that just contains the src url alone.
   * * `var SourceObject = {src: 'http://ex.com/video.mp4', type: 'video/mp4'};`
   * `var SourceString = 'http://example.com/some-video.mp4';`
   *
   * @typedef {Object|string} Tech~SourceObject
   *
   * @property {string} src
   *           The url to the source
   *
   * @property {string} type
   *           The mime type of the source
   */

  /**
   * A function used by {@link Tech} to create a new {@link TextTrack}.
   *
   * @private
   *
   * @param {Tech} self
   *        An instance of the Tech class.
   *
   * @param {string} kind
   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)
   *
   * @param {string} [label]
   *        Label to identify the text track
   *
   * @param {string} [language]
   *        Two letter language abbreviation
   *
   * @param {Object} [options={}]
   *        An object with additional text track options
   *
   * @return {TextTrack}
   *          The text track that was created.
   */
  function createTrackHelper(self, kind, label, language) {
    var options = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : {};

    var tracks = self.textTracks();

    options.kind = kind;

    if (label) {
      options.label = label;
    }
    if (language) {
      options.language = language;
    }
    options.tech = self;

    var track = new ALL.text.TrackClass(options);

    tracks.addTrack(track);

    return track;
  }

  /**
   * This is the base class for media playback technology controllers, such as
   * {@link Flash} and {@link HTML5}
   *
   * @extends Component
   */

  var Tech = function (_Component) {
    inherits(Tech, _Component);

    /**
     * Create an instance of this Tech.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     *
     * @param {Component~ReadyCallback} ready
     *        Callback function to call when the `HTML5` Tech is ready.
     */
    function Tech() {
      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      var ready = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : function () {
      };
      classCallCheck(this, Tech);

      // we don't want the tech to report user activity automatically.
      // This is done manually in addControlsListeners
      options.reportTouchActivity = false;

      // keep track of whether the current source has played at all to
      // implement a very limited played()
      var _this = possibleConstructorReturn(this, _Component.call(this, null, options, ready));

      _this.hasStarted_ = false;
      _this.on('playing', function () {
        this.hasStarted_ = true;
      });
      _this.on('loadstart', function () {
        this.hasStarted_ = false;
      });

      ALL.names.forEach(function (name) {
        var props = ALL[name];

        if (options && options[props.getterName]) {
          _this[props.privateName] = options[props.getterName];
        }
      });

      // Manually track progress in cases where the browser/flash player doesn't report it.
      if (!_this.featuresProgressEvents) {
        _this.manualProgressOn();
      }

      // Manually track timeupdates in cases where the browser/flash player doesn't report it.
      if (!_this.featuresTimeupdateEvents) {
        _this.manualTimeUpdatesOn();
      }

      ['Text', 'Audio', 'Video'].forEach(function (track) {
        if (options['native' + track + 'Tracks'] === false) {
          _this['featuresNative' + track + 'Tracks'] = false;
        }
      });

      if (options.nativeCaptions === false || options.nativeTextTracks === false) {
        _this.featuresNativeTextTracks = false;
      } else if (options.nativeCaptions === true || options.nativeTextTracks === true) {
        _this.featuresNativeTextTracks = true;
      }

      if (!_this.featuresNativeTextTracks) {
        _this.emulateTextTracks();
      }

      _this.autoRemoteTextTracks_ = new ALL.text.ListClass();

      _this.initTrackListeners();

      // Turn on component tap events only if not using native controls
      if (!options.nativeControlsForTouch) {
        _this.emitTapEvents();
      }

      if (_this.constructor) {
        _this.name_ = _this.constructor.name || 'Unknown Tech';
      }
      return _this;
    }

    /**
     * A special function to trigger source set in a way that will allow player
     * to re-trigger if the player or tech are not ready yet.
     *
     * @fires Tech#sourceset
     * @param {string} src The source string at the time of the source changing.
     */


    Tech.prototype.triggerSourceset = function triggerSourceset(src) {
      var _this2 = this;

      if (!this.isReady_) {
        // on initial ready we have to trigger source set
        // 1ms after ready so that player can watch for it.
        this.one('ready', function () {
          return _this2.setTimeout(function () {
            return _this2.triggerSourceset(src);
          }, 1);
        });
      }

      /**
       * Fired when the source is set on the tech causing the media element
       * to reload.
       *
       * @see {@link Player#event:sourceset}
       * @event Tech#sourceset
       * @type {EventTarget~Event}
       */
      this.trigger({
        src: src,
        type: 'sourceset'
      });
    };

    /* Fallbacks for unsupported event types
    ================================================================================ */

    /**
     * Polyfill the `progress` event for browsers that don't support it natively.
     *
     * @see {@link Tech#trackProgress}
     */


    Tech.prototype.manualProgressOn = function manualProgressOn() {
      this.on('durationchange', this.onDurationChange);

      this.manualProgress = true;

      // Trigger progress watching when a source begins loading
      this.one('ready', this.trackProgress);
    };

    /**
     * Turn off the polyfill for `progress` events that was created in
     * {@link Tech#manualProgressOn}
     */


    Tech.prototype.manualProgressOff = function manualProgressOff() {
      this.manualProgress = false;
      this.stopTrackingProgress();

      this.off('durationchange', this.onDurationChange);
    };

    /**
     * This is used to trigger a `progress` event when the buffered percent changes. It
     * sets an interval function that will be called every 500 milliseconds to check if the
     * buffer end percent has changed.
     *
     * > This function is called by {@link Tech#manualProgressOn}
     *
     * @param {EventTarget~Event} event
     *        The `ready` event that caused this to run.
     *
     * @listens Tech#ready
     * @fires Tech#progress
     */


    Tech.prototype.trackProgress = function trackProgress(event) {
      this.stopTrackingProgress();
      this.progressInterval = this.setInterval(bind(this, function () {
        // Don't trigger unless buffered amount is greater than last time

        var numBufferedPercent = this.bufferedPercent();

        if (this.bufferedPercent_ !== numBufferedPercent) {
          /**
           * See {@link Player#progress}
           *
           * @event Tech#progress
           * @type {EventTarget~Event}
           */
          this.trigger('progress');
        }

        this.bufferedPercent_ = numBufferedPercent;

        if (numBufferedPercent === 1) {
          this.stopTrackingProgress();
        }
      }), 500);
    };

    /**
     * Update our internal duration on a `durationchange` event by calling
     * {@link Tech#duration}.
     *
     * @param {EventTarget~Event} event
     *        The `durationchange` event that caused this to run.
     *
     * @listens Tech#durationchange
     */


    Tech.prototype.onDurationChange = function onDurationChange(event) {
      this.duration_ = this.duration();
    };

    /**
     * Get and create a `TimeRange` object for buffering.
     *
     * @return {TimeRange}
     *         The time range object that was created.
     */


    Tech.prototype.buffered = function buffered() {
      return createTimeRanges(0, 0);
    };

    /**
     * Get the percentage of the current video that is currently buffered.
     *
     * @return {number}
     *         A number from 0 to 1 that represents the decimal percentage of the
     *         video that is buffered.
     *
     */


    Tech.prototype.bufferedPercent = function bufferedPercent$$1() {
      return bufferedPercent(this.buffered(), this.duration_);
    };

    /**
     * Turn off the polyfill for `progress` events that was created in
     * {@link Tech#manualProgressOn}
     * Stop manually tracking progress events by clearing the interval that was set in
     * {@link Tech#trackProgress}.
     */


    Tech.prototype.stopTrackingProgress = function stopTrackingProgress() {
      this.clearInterval(this.progressInterval);
    };

    /**
     * Polyfill the `timeupdate` event for browsers that don't support it.
     *
     * @see {@link Tech#trackCurrentTime}
     */


    Tech.prototype.manualTimeUpdatesOn = function manualTimeUpdatesOn() {
      this.manualTimeUpdates = true;

      this.on('play', this.trackCurrentTime);
      this.on('pause', this.stopTrackingCurrentTime);
    };

    /**
     * Turn off the polyfill for `timeupdate` events that was created in
     * {@link Tech#manualTimeUpdatesOn}
     */


    Tech.prototype.manualTimeUpdatesOff = function manualTimeUpdatesOff() {
      this.manualTimeUpdates = false;
      this.stopTrackingCurrentTime();
      this.off('play', this.trackCurrentTime);
      this.off('pause', this.stopTrackingCurrentTime);
    };

    /**
     * Sets up an interval function to track current time and trigger `timeupdate` every
     * 250 milliseconds.
     *
     * @listens Tech#play
     * @triggers Tech#timeupdate
     */


    Tech.prototype.trackCurrentTime = function trackCurrentTime() {
      if (this.currentTimeInterval) {
        this.stopTrackingCurrentTime();
      }
      this.currentTimeInterval = this.setInterval(function () {
        /**
         * Triggered at an interval of 250ms to indicated that time is passing in the video.
         *
         * @event Tech#timeupdate
         * @type {EventTarget~Event}
         */
        this.trigger({type: 'timeupdate', target: this, manuallyTriggered: true});

        // 42 = 24 fps // 250 is what Webkit uses // FF uses 15
      }, 250);
    };

    /**
     * Stop the interval function created in {@link Tech#trackCurrentTime} so that the
     * `timeupdate` event is no longer triggered.
     *
     * @listens {Tech#pause}
     */


    Tech.prototype.stopTrackingCurrentTime = function stopTrackingCurrentTime() {
      this.clearInterval(this.currentTimeInterval);

      // #1002 - if the video ends right before the next timeupdate would happen,
      // the progress bar won't make it all the way to the end
      this.trigger({type: 'timeupdate', target: this, manuallyTriggered: true});
    };

    /**
     * Turn off all event polyfills, clear the `Tech`s {@link AudioTrackList},
     * {@link VideoTrackList}, and {@link TextTrackList}, and dispose of this Tech.
     *
     * @fires Component#dispose
     */


    Tech.prototype.dispose = function dispose() {

      // clear out all tracks because we can't reuse them between techs
      this.clearTracks(NORMAL.names);

      // Turn off any manual progress or timeupdate tracking
      if (this.manualProgress) {
        this.manualProgressOff();
      }

      if (this.manualTimeUpdates) {
        this.manualTimeUpdatesOff();
      }

      _Component.prototype.dispose.call(this);
    };

    /**
     * Clear out a single `TrackList` or an array of `TrackLists` given their names.
     *
     * > Note: Techs without source handlers should call this between sources for `video`
     *         & `audio` tracks. You don't want to use them between tracks!
     *
     * @param {string[]|string} types
     *        TrackList names to clear, valid names are `video`, `audio`, and
     *        `text`.
     */


    Tech.prototype.clearTracks = function clearTracks(types) {
      var _this3 = this;

      types = [].concat(types);
      // clear out all tracks because we can't reuse them between techs
      types.forEach(function (type) {
        var list = _this3[type + 'Tracks']() || [];
        var i = list.length;

        while (i--) {
          var track = list[i];

          if (type === 'text') {
            _this3.removeRemoteTextTrack(track);
          }
          list.removeTrack(track);
        }
      });
    };

    /**
     * Remove any TextTracks added via addRemoteTextTrack that are
     * flagged for automatic garbage collection
     */


    Tech.prototype.cleanupAutoTextTracks = function cleanupAutoTextTracks() {
      var list = this.autoRemoteTextTracks_ || [];
      var i = list.length;

      while (i--) {
        var track = list[i];

        this.removeRemoteTextTrack(track);
      }
    };

    /**
     * Reset the tech, which will removes all sources and reset the internal readyState.
     *
     * @abstract
     */


    Tech.prototype.reset = function reset() {
    };

    /**
     * Get or set an error on the Tech.
     *
     * @param {MediaError} [err]
     *        Error to set on the Tech
     *
     * @return {MediaError|null}
     *         The current error object on the tech, or null if there isn't one.
     */


    Tech.prototype.error = function error(err) {
      if (err !== undefined) {
        this.error_ = new MediaError(err);
        this.trigger('error');
      }
      return this.error_;
    };

    /**
     * Returns the `TimeRange`s that have been played through for the current source.
     *
     * > NOTE: This implementation is incomplete. It does not track the played `TimeRange`.
     *         It only checks whether the source has played at all or not.
     *
     * @return {TimeRange}
     *         - A single time range if this video has played
     *         - An empty set of ranges if not.
     */


    Tech.prototype.played = function played() {
      if (this.hasStarted_) {
        return createTimeRanges(0, 0);
      }
      return createTimeRanges();
    };

    /**
     * Causes a manual time update to occur if {@link Tech#manualTimeUpdatesOn} was
     * previously called.
     *
     * @fires Tech#timeupdate
     */


    Tech.prototype.setCurrentTime = function setCurrentTime() {
      // improve the accuracy of manual timeupdates
      if (this.manualTimeUpdates) {
        /**
         * A manual `timeupdate` event.
         *
         * @event Tech#timeupdate
         * @type {EventTarget~Event}
         */
        this.trigger({type: 'timeupdate', target: this, manuallyTriggered: true});
      }
    };

    /**
     * Turn on listeners for {@link VideoTrackList}, {@link {AudioTrackList}, and
     * {@link TextTrackList} events.
     *
     * This adds {@link EventTarget~EventListeners} for `addtrack`, and  `removetrack`.
     *
     * @fires Tech#audiotrackchange
     * @fires Tech#videotrackchange
     * @fires Tech#texttrackchange
     */


    Tech.prototype.initTrackListeners = function initTrackListeners() {
      var _this4 = this;

      /**
       * Triggered when tracks are added or removed on the Tech {@link AudioTrackList}
       *
       * @event Tech#audiotrackchange
       * @type {EventTarget~Event}
       */

      /**
       * Triggered when tracks are added or removed on the Tech {@link VideoTrackList}
       *
       * @event Tech#videotrackchange
       * @type {EventTarget~Event}
       */

      /**
       * Triggered when tracks are added or removed on the Tech {@link TextTrackList}
       *
       * @event Tech#texttrackchange
       * @type {EventTarget~Event}
       */
      NORMAL.names.forEach(function (name) {
        var props = NORMAL[name];
        var trackListChanges = function trackListChanges() {
          _this4.trigger(name + 'trackchange');
        };

        var tracks = _this4[props.getterName]();

        tracks.addEventListener('removetrack', trackListChanges);
        tracks.addEventListener('addtrack', trackListChanges);

        _this4.on('dispose', function () {
          tracks.removeEventListener('removetrack', trackListChanges);
          tracks.removeEventListener('addtrack', trackListChanges);
        });
      });
    };

    /**
     * Emulate TextTracks using vtt.js if necessary
     *
     * @fires Tech#vttjsloaded
     * @fires Tech#vttjserror
     */


    Tech.prototype.addWebVttScript_ = function addWebVttScript_() {
      var _this5 = this;

      if (window_1.WebVTT) {
        return;
      }

      // Initially, Tech.el_ is a child of a dummy-div wait until the Component system
      // signals that the Tech is ready at which point Tech.el_ is part of the DOM
      // before inserting the WebVTT script
      if (document_1.body.contains(this.el())) {

        // load via require if available and vtt.js script location was not passed in
        // as an option. novtt builds will turn the above require call into an empty object
        // which will cause this if check to always fail.
        if (!this.options_['vtt.js'] && isPlain(browserIndex) && Object.keys(browserIndex).length > 0) {
          this.trigger('vttjsloaded');
          return;
        }

        // load vtt.js via the script location option or the cdn of no location was
        // passed in
        var script = document_1.createElement('script');

        script.src = this.options_['vtt.js'] || 'https://vjs.zencdn.net/vttjs/0.14.1/vtt.min.js';
        script.onload = function () {
          /**
           * Fired when vtt.js is loaded.
           *
           * @event Tech#vttjsloaded
           * @type {EventTarget~Event}
           */
          _this5.trigger('vttjsloaded');
        };
        script.onerror = function () {
          /**
           * Fired when vtt.js was not loaded due to an error
           *
           * @event Tech#vttjsloaded
           * @type {EventTarget~Event}
           */
          _this5.trigger('vttjserror');
        };
        this.on('dispose', function () {
          script.onload = null;
          script.onerror = null;
        });
        // but have not loaded yet and we set it to true before the inject so that
        // we don't overwrite the injected window.WebVTT if it loads right away
        window_1.WebVTT = true;
        this.el().parentNode.appendChild(script);
      } else {
        this.ready(this.addWebVttScript_);
      }
    };

    /**
     * Emulate texttracks
     *
     */


    Tech.prototype.emulateTextTracks = function emulateTextTracks() {
      var _this6 = this;

      var tracks = this.textTracks();
      var remoteTracks = this.remoteTextTracks();
      var handleAddTrack = function handleAddTrack(e) {
        return tracks.addTrack(e.track);
      };
      var handleRemoveTrack = function handleRemoveTrack(e) {
        return tracks.removeTrack(e.track);
      };

      remoteTracks.on('addtrack', handleAddTrack);
      remoteTracks.on('removetrack', handleRemoveTrack);

      this.addWebVttScript_();

      var updateDisplay = function updateDisplay() {
        return _this6.trigger('texttrackchange');
      };

      var textTracksChanges = function textTracksChanges() {
        updateDisplay();

        for (var i = 0; i < tracks.length; i++) {
          var track = tracks[i];

          track.removeEventListener('cuechange', updateDisplay);
          if (track.mode === 'showing') {
            track.addEventListener('cuechange', updateDisplay);
          }
        }
      };

      textTracksChanges();
      tracks.addEventListener('change', textTracksChanges);
      tracks.addEventListener('addtrack', textTracksChanges);
      tracks.addEventListener('removetrack', textTracksChanges);

      this.on('dispose', function () {
        remoteTracks.off('addtrack', handleAddTrack);
        remoteTracks.off('removetrack', handleRemoveTrack);
        tracks.removeEventListener('change', textTracksChanges);
        tracks.removeEventListener('addtrack', textTracksChanges);
        tracks.removeEventListener('removetrack', textTracksChanges);

        for (var i = 0; i < tracks.length; i++) {
          var track = tracks[i];

          track.removeEventListener('cuechange', updateDisplay);
        }
      });
    };

    /**
     * Create and returns a remote {@link TextTrack} object.
     *
     * @param {string} kind
     *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)
     *
     * @param {string} [label]
     *        Label to identify the text track
     *
     * @param {string} [language]
     *        Two letter language abbreviation
     *
     * @return {TextTrack}
     *         The TextTrack that gets created.
     */


    Tech.prototype.addTextTrack = function addTextTrack(kind, label, language) {
      if (!kind) {
        throw new Error('TextTrack kind is required but was not provided');
      }

      return createTrackHelper(this, kind, label, language);
    };

    /**
     * Create an emulated TextTrack for use by addRemoteTextTrack
     *
     * This is intended to be overridden by classes that inherit from
     * Tech in order to create native or custom TextTracks.
     *
     * @param {Object} options
     *        The object should contain the options to initialize the TextTrack with.
     *
     * @param {string} [options.kind]
     *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).
     *
     * @param {string} [options.label].
     *        Label to identify the text track
     *
     * @param {string} [options.language]
     *        Two letter language abbreviation.
     *
     * @return {HTMLTrackElement}
     *         The track element that gets created.
     */


    Tech.prototype.createRemoteTextTrack = function createRemoteTextTrack(options) {
      var track = mergeOptions(options, {
        tech: this
      });

      return new REMOTE.remoteTextEl.TrackClass(track);
    };

    /**
     * Creates a remote text track object and returns an html track element.
     *
     * > Note: This can be an emulated {@link HTMLTrackElement} or a native one.
     *
     * @param {Object} options
     *        See {@link Tech#createRemoteTextTrack} for more detailed properties.
     *
     * @param {boolean} [manualCleanup=true]
     *        - When false: the TextTrack will be automatically removed from the video
     *          element whenever the source changes
     *        - When True: The TextTrack will have to be cleaned up manually
     *
     * @return {HTMLTrackElement}
     *         An Html Track Element.
     *
     * @deprecated The default functionality for this function will be equivalent
     *             to "manualCleanup=false" in the future. The manualCleanup parameter will
     *             also be removed.
     */


    Tech.prototype.addRemoteTextTrack = function addRemoteTextTrack() {
      var _this7 = this;

      var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      var manualCleanup = arguments[1];

      var htmlTrackElement = this.createRemoteTextTrack(options);

      if (manualCleanup !== true && manualCleanup !== false) {
        // deprecation warning
        log$1.warn('Calling addRemoteTextTrack without explicitly setting the "manualCleanup" parameter to `true` is deprecated and default to `false` in future version of video.js');
        manualCleanup = true;
      }

      // store HTMLTrackElement and TextTrack to remote list
      this.remoteTextTrackEls().addTrackElement_(htmlTrackElement);
      this.remoteTextTracks().addTrack(htmlTrackElement.track);

      if (manualCleanup !== true) {
        // create the TextTrackList if it doesn't exist
        this.ready(function () {
          return _this7.autoRemoteTextTracks_.addTrack(htmlTrackElement.track);
        });
      }

      return htmlTrackElement;
    };

    /**
     * Remove a remote text track from the remote `TextTrackList`.
     *
     * @param {TextTrack} track
     *        `TextTrack` to remove from the `TextTrackList`
     */


    Tech.prototype.removeRemoteTextTrack = function removeRemoteTextTrack(track) {
      var trackElement = this.remoteTextTrackEls().getTrackElementByTrack_(track);

      // remove HTMLTrackElement and TextTrack from remote list
      this.remoteTextTrackEls().removeTrackElement_(trackElement);
      this.remoteTextTracks().removeTrack(track);
      this.autoRemoteTextTracks_.removeTrack(track);
    };

    /**
     * Gets available media playback quality metrics as specified by the W3C's Media
     * Playback Quality API.
     *
     * @see [Spec]{@link https://wicg.github.io/media-playback-quality}
     *
     * @return {Object}
     *         An object with supported media playback quality metrics
     *
     * @abstract
     */


    Tech.prototype.getVideoPlaybackQuality = function getVideoPlaybackQuality() {
      return {};
    };

    /**
     * A method to set a poster from a `Tech`.
     *
     * @abstract
     */


    Tech.prototype.setPoster = function setPoster() {
    };

    /**
     * A method to check for the presence of the 'playsinline' <video> attribute.
     *
     * @abstract
     */


    Tech.prototype.playsinline = function playsinline() {
    };

    /**
     * A method to set or unset the 'playsinline' <video> attribute.
     *
     * @abstract
     */


    Tech.prototype.setPlaysinline = function setPlaysinline() {
    };

    /**
     * Attempt to force override of native audio tracks.
     *
     * @param {Boolean} override - If set to true native audio will be overridden,
     * otherwise native audio will potentially be used.
     *
     * @abstract
     */


    Tech.prototype.overrideNativeAudioTracks = function overrideNativeAudioTracks() {
    };

    /**
     * Attempt to force override of native video tracks.
     *
     * @param {Boolean} override - If set to true native video will be overridden,
     * otherwise native video will potentially be used.
     *
     * @abstract
     */


    Tech.prototype.overrideNativeVideoTracks = function overrideNativeVideoTracks() {
    };

    /*
     * Check if the tech can support the given mime-type.
     *
     * The base tech does not support any type, but source handlers might
     * overwrite this.
     *
     * @param  {string} type
     *         The mimetype to check for support
     *
     * @return {string}
     *         'probably', 'maybe', or empty string
     *
     * @see [Spec]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/canPlayType}
     *
     * @abstract
     */


    Tech.prototype.canPlayType = function canPlayType() {
      return '';
    };

    /**
     * Check if the type is supported by this tech.
     *
     * The base tech does not support any type, but source handlers might
     * overwrite this.
     *
     * @param {string} type
     *        The media type to check
     * @return {string} Returns the native video element's response
     */


    Tech.canPlayType = function canPlayType() {
      return '';
    };

    /**
     * Check if the tech can support the given source
     * @param {Object} srcObj
     *        The source object
     * @param {Object} options
     *        The options passed to the tech
     * @return {string} 'probably', 'maybe', or '' (empty string)
     */


    Tech.canPlaySource = function canPlaySource(srcObj, options) {
      return Tech.canPlayType(srcObj.type);
    };

    /*
     * Return whether the argument is a Tech or not.
     * Can be passed either a Class like `Html5` or a instance like `player.tech_`
     *
     * @param {Object} component
     *        The item to check
     *
     * @return {boolean}
     *         Whether it is a tech or not
     *         - True if it is a tech
     *         - False if it is not
     */


    Tech.isTech = function isTech(component) {
      return component.prototype instanceof Tech || component instanceof Tech || component === Tech;
    };

    /**
     * Registers a `Tech` into a shared list for videojs.
     *
     * @param {string} name
     *        Name of the `Tech` to register.
     *
     * @param {Object} tech
     *        The `Tech` class to register.
     */


    Tech.registerTech = function registerTech(name, tech) {
      if (!Tech.techs_) {
        Tech.techs_ = {};
      }

      if (!Tech.isTech(tech)) {
        throw new Error('Tech ' + name + ' must be a Tech');
      }

      if (!Tech.canPlayType) {
        throw new Error('Techs must have a static canPlayType method on them');
      }
      if (!Tech.canPlaySource) {
        throw new Error('Techs must have a static canPlaySource method on them');
      }

      name = toTitleCase(name);

      Tech.techs_[name] = tech;
      if (name !== 'Tech') {
        // camel case the techName for use in techOrder
        Tech.defaultTechOrder_.push(name);
      }
      return tech;
    };

    /**
     * Get a `Tech` from the shared list by name.
     *
     * @param {string} name
     *        `camelCase` or `TitleCase` name of the Tech to get
     *
     * @return {Tech|undefined}
     *         The `Tech` or undefined if there was no tech with the name requested.
     */


    Tech.getTech = function getTech(name) {
      if (!name) {
        return;
      }

      name = toTitleCase(name);

      if (Tech.techs_ && Tech.techs_[name]) {
        return Tech.techs_[name];
      }

      if (window_1 && window_1.videojs && window_1.videojs[name]) {
        log$1.warn('The ' + name + ' tech was added to the videojs object when it should be registered using videojs.registerTech(name, tech)');
        return window_1.videojs[name];
      }
    };

    return Tech;
  }(Component);

  /**
   * Get the {@link VideoTrackList}
   *
   * @returns {VideoTrackList}
   * @method Tech.prototype.videoTracks
   */

  /**
   * Get the {@link AudioTrackList}
   *
   * @returns {AudioTrackList}
   * @method Tech.prototype.audioTracks
   */

  /**
   * Get the {@link TextTrackList}
   *
   * @returns {TextTrackList}
   * @method Tech.prototype.textTracks
   */

  /**
   * Get the remote element {@link TextTrackList}
   *
   * @returns {TextTrackList}
   * @method Tech.prototype.remoteTextTracks
   */

  /**
   * Get the remote element {@link HtmlTrackElementList}
   *
   * @returns {HtmlTrackElementList}
   * @method Tech.prototype.remoteTextTrackEls
   */

  ALL.names.forEach(function (name) {
    var props = ALL[name];

    Tech.prototype[props.getterName] = function () {
      this[props.privateName] = this[props.privateName] || new props.ListClass();
      return this[props.privateName];
    };
  });

  /**
   * List of associated text tracks
   *
   * @type {TextTrackList}
   * @private
   * @property Tech#textTracks_
   */

  /**
   * List of associated audio tracks.
   *
   * @type {AudioTrackList}
   * @private
   * @property Tech#audioTracks_
   */

  /**
   * List of associated video tracks.
   *
   * @type {VideoTrackList}
   * @private
   * @property Tech#videoTracks_
   */

  /**
   * Boolean indicating whether the `Tech` supports volume control.
   *
   * @type {boolean}
   * @default
   */
  Tech.prototype.featuresVolumeControl = true;

  /**
   * Boolean indicating whether the `Tech` supports fullscreen resize control.
   * Resizing plugins using request fullscreen reloads the plugin
   *
   * @type {boolean}
   * @default
   */
  Tech.prototype.featuresFullscreenResize = false;

  /**
   * Boolean indicating whether the `Tech` supports changing the speed at which the video
   * plays. Examples:
   *   - Set player to playOld 2x (twice) as fast
   *   - Set player to playOld 0.5x (half) as fast
   *
   * @type {boolean}
   * @default
   */
  Tech.prototype.featuresPlaybackRate = false;

  /**
   * Boolean indicating whether the `Tech` supports the `progress` event. This is currently
   * not triggered by video-js-swf. This will be used to determine if
   * {@link Tech#manualProgressOn} should be called.
   *
   * @type {boolean}
   * @default
   */
  Tech.prototype.featuresProgressEvents = false;

  /**
   * Boolean indicating whether the `Tech` supports the `sourceset` event.
   *
   * A tech should set this to `true` and then use {@link Tech#triggerSourceset}
   * to trigger a {@link Tech#event:sourceset} at the earliest time after getting
   * a new source.
   *
   * @type {boolean}
   * @default
   */
  Tech.prototype.featuresSourceset = false;

  /**
   * Boolean indicating whether the `Tech` supports the `timeupdate` event. This is currently
   * not triggered by video-js-swf. This will be used to determine if
   * {@link Tech#manualTimeUpdates} should be called.
   *
   * @type {boolean}
   * @default
   */
  Tech.prototype.featuresTimeupdateEvents = false;

  /**
   * Boolean indicating whether the `Tech` supports the native `TextTrack`s.
   * This will help us integrate with native `TextTrack`s if the browser supports them.
   *
   * @type {boolean}
   * @default
   */
  Tech.prototype.featuresNativeTextTracks = false;

  /**
   * A functional mixin for techs that want to use the Source Handler pattern.
   * Source handlers are scripts for handling specific formats.
   * The source handler pattern is used for adaptive formats (HLS, DASH) that
   * manually load video data and feed it into a Source Buffer (Media Source Extensions)
   * Example: `Tech.withSourceHandlers.call(MyTech);`
   *
   * @param {Tech} _Tech
   *        The tech to add source handler functions to.
   *
   * @mixes Tech~SourceHandlerAdditions
   */
  Tech.withSourceHandlers = function (_Tech) {

    /**
     * Register a source handler
     *
     * @param {Function} handler
     *        The source handler class
     *
     * @param {number} [index]
     *        Register it at the following index
     */
    _Tech.registerSourceHandler = function (handler, index) {
      var handlers = _Tech.sourceHandlers;

      if (!handlers) {
        handlers = _Tech.sourceHandlers = [];
      }

      if (index === undefined) {
        // add to the end of the list
        index = handlers.length;
      }

      handlers.splice(index, 0, handler);
    };

    /**
     * Check if the tech can support the given type. Also checks the
     * Techs sourceHandlers.
     *
     * @param {string} type
     *         The mimetype to check.
     *
     * @return {string}
     *         'probably', 'maybe', or '' (empty string)
     */
    _Tech.canPlayType = function (type) {
      var handlers = _Tech.sourceHandlers || [];
      var can = void 0;

      for (var i = 0; i < handlers.length; i++) {
        can = handlers[i].canPlayType(type);

        if (can) {
          return can;
        }
      }

      return '';
    };

    /**
     * Returns the first source handler that supports the source.
     *
     * TODO: Answer question: should 'probably' be prioritized over 'maybe'
     *
     * @param {Tech~SourceObject} source
     *        The source object
     *
     * @param {Object} options
     *        The options passed to the tech
     *
     * @return {SourceHandler|null}
     *          The first source handler that supports the source or null if
     *          no SourceHandler supports the source
     */
    _Tech.selectSourceHandler = function (source, options) {
      var handlers = _Tech.sourceHandlers || [];
      var can = void 0;

      for (var i = 0; i < handlers.length; i++) {
        can = handlers[i].canHandleSource(source, options);

        if (can) {
          return handlers[i];
        }
      }

      return null;
    };

    /**
     * Check if the tech can support the given source.
     *
     * @param {Tech~SourceObject} srcObj
     *        The source object
     *
     * @param {Object} options
     *        The options passed to the tech
     *
     * @return {string}
     *         'probably', 'maybe', or '' (empty string)
     */
    _Tech.canPlaySource = function (srcObj, options) {
      var sh = _Tech.selectSourceHandler(srcObj, options);

      if (sh) {
        return sh.canHandleSource(srcObj, options);
      }

      return '';
    };

    /**
     * When using a source handler, prefer its implementation of
     * any function normally provided by the tech.
     */
    var deferrable = ['seekable', 'seeking', 'duration'];

    /**
     * A wrapper around {@link Tech#seekable} that will call a `SourceHandler`s seekable
     * function if it exists, with a fallback to the Techs seekable function.
     *
     * @method _Tech.seekable
     */

    /**
     * A wrapper around {@link Tech#duration} that will call a `SourceHandler`s duration
     * function if it exists, otherwise it will fallback to the techs duration function.
     *
     * @method _Tech.duration
     */

    deferrable.forEach(function (fnName) {
      var originalFn = this[fnName];

      if (typeof originalFn !== 'function') {
        return;
      }

      this[fnName] = function () {
        if (this.sourceHandler_ && this.sourceHandler_[fnName]) {
          return this.sourceHandler_[fnName].apply(this.sourceHandler_, arguments);
        }
        return originalFn.apply(this, arguments);
      };
    }, _Tech.prototype);

    /**
     * Create a function for setting the source using a source object
     * and source handlers.
     * Should never be called unless a source handler was found.
     *
     * @param {Tech~SourceObject} source
     *        A source object with src and type keys
     */
    _Tech.prototype.setSource = function (source) {
      var sh = _Tech.selectSourceHandler(source, this.options_);

      if (!sh) {
        // Fall back to a native source hander when unsupported sources are
        // deliberately set
        if (_Tech.nativeSourceHandler) {
          sh = _Tech.nativeSourceHandler;
        } else {
          log$1.error('No source handler found for the current source.');
        }
      }

      // Dispose any existing source handler
      this.disposeSourceHandler();
      this.off('dispose', this.disposeSourceHandler);

      if (sh !== _Tech.nativeSourceHandler) {
        this.currentSource_ = source;
      }

      this.sourceHandler_ = sh.handleSource(source, this, this.options_);
      this.on('dispose', this.disposeSourceHandler);
    };

    /**
     * Clean up any existing SourceHandlers and listeners when the Tech is disposed.
     *
     * @listens Tech#dispose
     */
    _Tech.prototype.disposeSourceHandler = function () {
      // if we have a source and get another one
      // then we are loading something new
      // than clear all of our current tracks
      if (this.currentSource_) {
        this.clearTracks(['audio', 'video']);
        this.currentSource_ = null;
      }

      // always clean up auto-text tracks
      this.cleanupAutoTextTracks();

      if (this.sourceHandler_) {

        if (this.sourceHandler_.dispose) {
          this.sourceHandler_.dispose();
        }

        this.sourceHandler_ = null;
      }
    };
  };

  // The base Tech class needs to be registered as a Component. It is the only
  // Tech that can be registered as a Component.
  Component.registerComponent('Tech', Tech);
  Tech.registerTech('Tech', Tech);

  /**
   * A list of techs that should be added to techOrder on Players
   *
   * @private
   */
  Tech.defaultTechOrder_ = [];

  var middlewares = {};
  var middlewareInstances = {};

  var TERMINATOR = {};

  function use(type, middleware) {
    middlewares[type] = middlewares[type] || [];
    middlewares[type].push(middleware);
  }

  function setSource(player, src, next) {
    player.setTimeout(function () {
      return setSourceHelper(src, middlewares[src.type], next, player);
    }, 1);
  }

  function setTech(middleware, tech) {
    middleware.forEach(function (mw) {
      return mw.setTech && mw.setTech(tech);
    });
  }

  /**
   * Calls a getter on the tech first, through each middleware
   * from right to left to the player.
   */
  function get$1(middleware, tech, method) {
    return middleware.reduceRight(middlewareIterator(method), tech[method]());
  }

  /**
   * Takes the argument given to the player and calls the setter method on each
   * middleware from left to right to the tech.
   */
  function set$1(middleware, tech, method, arg) {
    return tech[method](middleware.reduce(middlewareIterator(method), arg));
  }

  /**
   * Takes the argument given to the player and calls the `call` version of the method
   * on each middleware from left to right.
   * Then, call the passed in method on the tech and return the result unchanged
   * back to the player, through middleware, this time from right to left.
   */
  function mediate(middleware, tech, method) {
    var arg = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;

    var callMethod = 'call' + toTitleCase(method);
    var middlewareValue = middleware.reduce(middlewareIterator(callMethod), arg);
    var terminated = middlewareValue === TERMINATOR;
    var returnValue = terminated ? null : tech[method](middlewareValue);

    executeRight(middleware, method, returnValue, terminated);

    return returnValue;
  }

  var allowedGetters = {
    buffered: 1,
    currentTime: 1,
    duration: 1,
    seekable: 1,
    played: 1,
    paused: 1
  };

  var allowedSetters = {
    setCurrentTime: 1
  };

  var allowedMediators = {
    play: 1,
    pause: 1
  };

  function middlewareIterator(method) {
    return function (value, mw) {
      // if the previous middleware terminated, pass along the termination
      if (value === TERMINATOR) {
        return TERMINATOR;
      }

      if (mw[method]) {
        return mw[method](value);
      }

      return value;
    };
  }

  function executeRight(mws, method, value, terminated) {
    for (var i = mws.length - 1; i >= 0; i--) {
      var mw = mws[i];

      if (mw[method]) {
        mw[method](terminated, value);
      }
    }
  }

  function clearCacheForPlayer(player) {
    middlewareInstances[player.id()] = null;
  }

  /**
   * {
   *  [playerId]: [[mwFactory, mwInstance], ...]
   * }
   */
  function getOrCreateFactory(player, mwFactory) {
    var mws = middlewareInstances[player.id()];
    var mw = null;

    if (mws === undefined || mws === null) {
      mw = mwFactory(player);
      middlewareInstances[player.id()] = [[mwFactory, mw]];
      return mw;
    }

    for (var i = 0; i < mws.length; i++) {
      var _mws$i = mws[i],
        mwf = _mws$i[0],
        mwi = _mws$i[1];


      if (mwf !== mwFactory) {
        continue;
      }

      mw = mwi;
    }

    if (mw === null) {
      mw = mwFactory(player);
      mws.push([mwFactory, mw]);
    }

    return mw;
  }

  function setSourceHelper() {
    var src = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
    var middleware = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
    var next = arguments[2];
    var player = arguments[3];
    var acc = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : [];
    var lastRun = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : false;
    var mwFactory = middleware[0],
      mwrest = middleware.slice(1);

    // if mwFactory is a string, then we're at a fork in the road

    if (typeof mwFactory === 'string') {
      setSourceHelper(src, middlewares[mwFactory], next, player, acc, lastRun);

      // if we have an mwFactory, call it with the player to get the mw,
      // then call the mw's setSource method
    } else if (mwFactory) {
      var mw = getOrCreateFactory(player, mwFactory);

      mw.setSource(assign({}, src), function (err, _src) {

        // something happened, try the next middleware on the current level
        // make sure to use the old src
        if (err) {
          return setSourceHelper(src, mwrest, next, player, acc, lastRun);
        }

        // we've succeeded, now we need to go deeper
        acc.push(mw);

        // if it's the same type, continue down the current chain
        // otherwise, we want to go down the new chain
        setSourceHelper(_src, src.type === _src.type ? mwrest : middlewares[_src.type], next, player, acc, lastRun);
      });
    } else if (mwrest.length) {
      setSourceHelper(src, mwrest, next, player, acc, lastRun);
    } else if (lastRun) {
      next(src, acc);
    } else {
      setSourceHelper(src, middlewares['*'], next, player, acc, true);
    }
  }

  /**
   * Mimetypes
   *
   * @see http://hul.harvard.edu/ois/////systems/wax/wax-public-help/mimetypes.htm
   * @typedef Mimetypes~Kind
   * @enum
   */
  var MimetypesKind = {
    opus: 'video/ogg',
    ogv: 'video/ogg',
    mp4: 'video/mp4',
    mov: 'video/mp4',
    m4v: 'video/mp4',
    mkv: 'video/x-matroska',
    mp3: 'audio/mpeg',
    aac: 'audio/aac',
    oga: 'audio/ogg',
    m3u8: 'application/x-mpegURL'
  };

  /**
   * Get the mimetype of a given src url if possible
   *
   * @param {string} src
   *        The url to the src
   *
   * @return {string}
   *         return the mimetype if it was known or empty string otherwise
   */
  var getMimetype = function getMimetype() {
    var src = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';

    var ext = getFileExtension(src);
    var mimetype = MimetypesKind[ext.toLowerCase()];

    return mimetype || '';
  };

  /**
   * Find the mime type of a given source string if possible. Uses the player
   * source cache.
   *
   * @param {Player} player
   *        The player object
   *
   * @param {string} src
   *        The source string
   *
   * @return {string}
   *         The type that was found
   */
  var findMimetype = function findMimetype(player, src) {
    if (!src) {
      return '';
    }

    // 1. check for the type in the `source` cache
    if (player.cache_.source.src === src && player.cache_.source.type) {
      return player.cache_.source.type;
    }

    // 2. see if we have this source in our `currentSources` cache
    var matchingSources = player.cache_.sources.filter(function (s) {
      return s.src === src;
    });

    if (matchingSources.length) {
      return matchingSources[0].type;
    }

    // 3. look for the src url in source elements and use the type there
    var sources = player.$$('source');

    for (var i = 0; i < sources.length; i++) {
      var s = sources[i];

      if (s.type && s.src && s.src === src) {
        return s.type;
      }
    }

    // 4. finally fallback to our list of mime types based on src url extension
    return getMimetype(src);
  };

  /**
   * @module filter-source
   */

  /**
   * Filter out single bad source objects or multiple source objects in an
   * array. Also flattens nested source object arrays into a 1 dimensional
   * array of source objects.
   *
   * @param {Tech~SourceObject|Tech~SourceObject[]} src
   *        The src object to filter
   *
   * @return {Tech~SourceObject[]}
   *         An array of sourceobjects containing only valid sources
   *
   * @private
   */
  var filterSource = function filterSource(src) {
    // traverse array
    if (Array.isArray(src)) {
      var newsrc = [];

      src.forEach(function (srcobj) {
        srcobj = filterSource(srcobj);

        if (Array.isArray(srcobj)) {
          newsrc = newsrc.concat(srcobj);
        } else if (isObject(srcobj)) {
          newsrc.push(srcobj);
        }
      });

      src = newsrc;
    } else if (typeof src === 'string' && src.trim()) {
      // convert string into object
      src = [fixSource({src: src})];
    } else if (isObject(src) && typeof src.src === 'string' && src.src && src.src.trim()) {
      // src is already valid
      src = [fixSource(src)];
    } else {
      // invalid source, turn it into an empty array
      src = [];
    }

    return src;
  };

  /**
   * Checks src mimetype, adding it when possible
   *
   * @param {Tech~SourceObject} src
   *        The src object to check
   * @return {Tech~SourceObject}
   *        src Object with known type
   */
  function fixSource(src) {
    var mimetype = getMimetype(src.src);

    if (!src.type && mimetype) {
      src.type = mimetype;
    }

    return src;
  }

  /**
   * @file loader.js
   */

  /**
   * The `MediaLoader` is the `Component` that decides which playback technology to load
   * when a player is initialized.
   *
   * @extends Component
   */

  var MediaLoader = function (_Component) {
    inherits(MediaLoader, _Component);

    /**
     * Create an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should attach to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     *
     * @param {Component~ReadyCallback} [ready]
     *        The function that is run when this component is ready.
     */
    function MediaLoader(player, options, ready) {
      classCallCheck(this, MediaLoader);

      // MediaLoader has no element
      var options_ = mergeOptions({createEl: false}, options);

      // If there are no sources when the player is initialized,
      // load the first supported playback technology.

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options_, ready));

      if (!options.playerOptions.sources || options.playerOptions.sources.length === 0) {
        for (var i = 0, j = options.playerOptions.techOrder; i < j.length; i++) {
          var techName = toTitleCase(j[i]);
          var tech = Tech.getTech(techName);

          // Support old behavior of techs being registered as components.
          // Remove once that deprecated behavior is removed.
          if (!techName) {
            tech = Component.getComponent(techName);
          }

          // Check if the browser supports this technology
          if (tech && tech.isSupported()) {
            player.loadTech_(techName);
            break;
          }
        }
      } else {
        // Loop through playback technologies (HTML5, Flash) and check for support.
        // Then load the best source.
        // A few assumptions here:
        //   All playback technologies respect preload false.
        player.src(options.playerOptions.sources);
      }
      return _this;
    }

    return MediaLoader;
  }(Component);

  Component.registerComponent('MediaLoader', MediaLoader);

  /**
   * @file clickable-component.js
   */

  /**
   * Clickable Component which is clickable or keyboard actionable,
   * but is not a native HTML button.
   *
   * @extends Component
   */

  var ClickableComponent = function (_Component) {
    inherits(ClickableComponent, _Component);

    /**
     * Creates an instance of this class.
     *
     * @param  {Player} player
     *         The `Player` that this class should be attached to.
     *
     * @param  {Object} [options]
     *         The key/value store of player options.
     */
    function ClickableComponent(player, options) {
      classCallCheck(this, ClickableComponent);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      _this.emitTapEvents();

      _this.enable();
      return _this;
    }

    /**
     * Create the `Component`s DOM element.
     *
     * @param {string} [tag=div]
     *        The element's node type.
     *
     * @param {Object} [props={}]
     *        An object of properties that should be set on the element.
     *
     * @param {Object} [attributes={}]
     *        An object of attributes that should be set on the element.
     *
     * @return {Element}
     *         The element that gets created.
     */


    ClickableComponent.prototype.createEl = function createEl$$1() {
      var tag = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'div';
      var props = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

      props = assign({
        innerHTML: '<span aria-hidden="true" class="vjs-icon-placeholder"></span>',
        className: this.buildCSSClass(),
        tabIndex: 0
      }, props);

      if (tag === 'button') {
        log$1.error('Creating a ClickableComponent with an HTML element of ' + tag + ' is not supported; use a Button instead.');
      }

      // Add ARIA attributes for clickable element which is not a native HTML button
      attributes = assign({
        role: 'button'
      }, attributes);

      this.tabIndex_ = props.tabIndex;

      var el = _Component.prototype.createEl.call(this, tag, props, attributes);

      this.createControlTextEl(el);

      return el;
    };

    ClickableComponent.prototype.dispose = function dispose() {
      // remove controlTextEl_ on dispose
      this.controlTextEl_ = null;

      _Component.prototype.dispose.call(this);
    };

    /**
     * Create a control text element on this `Component`
     *
     * @param {Element} [el]
     *        Parent element for the control text.
     *
     * @return {Element}
     *         The control text element that gets created.
     */


    ClickableComponent.prototype.createControlTextEl = function createControlTextEl(el) {
      this.controlTextEl_ = createEl('span', {
        className: 'vjs-control-text'
      }, {
        // let the screen reader user know that the text of the element may change
        'aria-live': 'polite'
      });

      if (el) {
        el.appendChild(this.controlTextEl_);
      }

      this.controlText(this.controlText_, el);

      return this.controlTextEl_;
    };

    /**
     * Get or set the localize text to use for the controls on the `Component`.
     *
     * @param {string} [text]
     *        Control text for element.
     *
     * @param {Element} [el=this.el()]
     *        Element to set the title on.
     *
     * @return {string}
     *         - The control text when getting
     */


    ClickableComponent.prototype.controlText = function controlText(text) {
      var el = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.el();

      if (text === undefined) {
        return this.controlText_ || 'Need Text';
      }

      var localizedText = this.localize(text);

      this.controlText_ = text;
      textContent(this.controlTextEl_, localizedText);
      if (!this.nonIconControl) {
        // Set title attribute if only an icon is shown
        el.setAttribute('title', localizedText);
      }
    };

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    ClickableComponent.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-control vjs-button ' + _Component.prototype.buildCSSClass.call(this);
    };

    /**
     * Enable this `Component`s element.
     */


    ClickableComponent.prototype.enable = function enable() {
      if (!this.enabled_) {
        this.enabled_ = true;
        this.removeClass('vjs-disabled');
        this.el_.setAttribute('aria-disabled', 'false');
        if (typeof this.tabIndex_ !== 'undefined') {
          this.el_.setAttribute('tabIndex', this.tabIndex_);
        }
        this.on(['tap', 'click'], this.handleClick);
        this.on('focus', this.handleFocus);
        this.on('blur', this.handleBlur);
      }
    };

    /**
     * Disable this `Component`s element.
     */


    ClickableComponent.prototype.disable = function disable() {
      this.enabled_ = false;
      this.addClass('vjs-disabled');
      this.el_.setAttribute('aria-disabled', 'true');
      if (typeof this.tabIndex_ !== 'undefined') {
        this.el_.removeAttribute('tabIndex');
      }
      this.off(['tap', 'click'], this.handleClick);
      this.off('focus', this.handleFocus);
      this.off('blur', this.handleBlur);
    };

    /**
     * This gets called when a `ClickableComponent` gets:
     * - Clicked (via the `click` event, listening starts in the constructor)
     * - Tapped (via the `tap` event, listening starts in the constructor)
     * - The following things happen in order:
     *   1. {@link ClickableComponent#handleFocus} is called via a `focus` event on the
     *      `ClickableComponent`.
     *   2. {@link ClickableComponent#handleFocus} adds a listener for `keydown` on using
     *      {@link ClickableComponent#handleKeyPress}.
     *   3. `ClickableComponent` has not had a `blur` event (`blur` means that focus was lost). The user presses
     *      the space or enter key.
     *   4. {@link ClickableComponent#handleKeyPress} calls this function with the `keydown`
     *      event as a parameter.
     *
     * @param {EventTarget~Event} event
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     * @abstract
     */


    ClickableComponent.prototype.handleClick = function handleClick(event) {
    };

    /**
     * This gets called when a `ClickableComponent` gains focus via a `focus` event.
     * Turns on listening for `keydown` events. When they happen it
     * calls `this.handleKeyPress`.
     *
     * @param {EventTarget~Event} event
     *        The `focus` event that caused this function to be called.
     *
     * @listens focus
     */


    ClickableComponent.prototype.handleFocus = function handleFocus(event) {
      on(document_1, 'keydown', bind(this, this.handleKeyPress));
    };

    /**
     * Called when this ClickableComponent has focus and a key gets pressed down. By
     * default it will call `this.handleClick` when the key is space or enter.
     *
     * @param {EventTarget~Event} event
     *        The `keydown` event that caused this function to be called.
     *
     * @listens keydown
     */


    ClickableComponent.prototype.handleKeyPress = function handleKeyPress(event) {

      // Support Space (32) or Enter (13) key operation to fire a click event
      if (event.which === 32 || event.which === 13) {
        event.preventDefault();
        this.trigger('click');
      } else if (_Component.prototype.handleKeyPress) {

        // Pass keypress handling up for unsupported keys
        _Component.prototype.handleKeyPress.call(this, event);
      }
    };

    /**
     * Called when a `ClickableComponent` loses focus. Turns off the listener for
     * `keydown` events. Which Stops `this.handleKeyPress` from getting called.
     *
     * @param {EventTarget~Event} event
     *        The `blur` event that caused this function to be called.
     *
     * @listens blur
     */


    ClickableComponent.prototype.handleBlur = function handleBlur(event) {
      off(document_1, 'keydown', bind(this, this.handleKeyPress));
    };

    return ClickableComponent;
  }(Component);

  Component.registerComponent('ClickableComponent', ClickableComponent);

  /**
   * @file poster-image.js
   */

  /**
   * A `ClickableComponent` that handles showing the poster image for the player.
   *
   * @extends ClickableComponent
   */

  var PosterImage = function (_ClickableComponent) {
    inherits(PosterImage, _ClickableComponent);

    /**
     * Create an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should attach to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function PosterImage(player, options) {
      classCallCheck(this, PosterImage);

      var _this = possibleConstructorReturn(this, _ClickableComponent.call(this, player, options));

      _this.update();
      player.on('posterchange', bind(_this, _this.update));
      return _this;
    }

    /**
     * Clean up and dispose of the `PosterImage`.
     */


    PosterImage.prototype.dispose = function dispose() {
      this.player().off('posterchange', this.update);
      _ClickableComponent.prototype.dispose.call(this);
    };

    /**
     * Create the `PosterImage`s DOM element.
     *
     * @return {Element}
     *         The element that gets created.
     */


    PosterImage.prototype.createEl = function createEl$$1() {
      var el = createEl('div', {
        className: 'vjs-poster',

        // Don't want poster to be tabbable.
        tabIndex: -1
      });

      return el;
    };

    /**
     * An {@link EventTarget~EventListener} for {@link Player#posterchange} events.
     *
     * @listens Player#posterchange
     *
     * @param {EventTarget~Event} [event]
     *        The `Player#posterchange` event that triggered this function.
     */


    PosterImage.prototype.update = function update(event) {
      var url = this.player().poster();

      this.setSrc(url);

      // If there's no poster source we should display:none on this component
      // so it's not still clickable or right-clickable
      if (url) {
        this.show();
      } else {
        this.hide();
      }
    };

    /**
     * Set the source of the `PosterImage` depending on the display method.
     *
     * @param {string} url
     *        The URL to the source for the `PosterImage`.
     */


    PosterImage.prototype.setSrc = function setSrc(url) {
      var backgroundImage = '';

      // Any falsy value should stay as an empty string, otherwise
      // this will throw an extra error
      if (url) {
        backgroundImage = 'url("' + url + '")';
      }

      this.el_.style.backgroundImage = backgroundImage;
    };

    /**
     * An {@link EventTarget~EventListener} for clicks on the `PosterImage`. See
     * {@link ClickableComponent#handleClick} for instances where this will be triggered.
     *
     * @listens tap
     * @listens click
     * @listens keydown
     *
     * @param {EventTarget~Event} event
     +        The `click`, `tap` or `keydown` event that caused this function to be called.
     */


    PosterImage.prototype.handleClick = function handleClick(event) {
      // We don't want a click to trigger playback when controls are disabled
      if (!this.player_.controls()) {
        return;
      }

      if (this.player_.paused()) {
        this.player_.play();
      } else {
        this.player_.pause();
      }
    };

    return PosterImage;
  }(ClickableComponent);

  Component.registerComponent('PosterImage', PosterImage);

  /**
   * @file text-track-display.js
   */

  var darkGray = '#222';
  var lightGray = '#ccc';
  var fontMap = {
    monospace: 'monospace',
    sansSerif: 'sans-serif',
    serif: 'serif',
    monospaceSansSerif: '"Andale Mono", "Lucida Console", monospace',
    monospaceSerif: '"Courier New", monospace',
    proportionalSansSerif: 'sans-serif',
    proportionalSerif: 'serif',
    casual: '"Comic Sans MS", Impact, fantasy',
    script: '"Monotype Corsiva", cursive',
    smallcaps: '"Andale Mono", "Lucida Console", monospace, sans-serif'
  };

  /**
   * Construct an rgba color from a given hex color code.
   *
   * @param {number} color
   *        Hex number for color, like #f0e.
   *
   * @param {number} opacity
   *        Value for opacity, 0.0 - 1.0.
   *
   * @return {string}
   *         The rgba color that was created, like 'rgba(255, 0, 0, 0.3)'.
   *
   * @private
   */
  function constructColor(color, opacity) {
    return 'rgba(' +
      // color looks like "#f0e"
      parseInt(color[1] + color[1], 16) + ',' + parseInt(color[2] + color[2], 16) + ',' + parseInt(color[3] + color[3], 16) + ',' + opacity + ')';
  }

  /**
   * Try to update the style of a DOM element. Some style changes will throw an error,
   * particularly in IE8. Those should be noops.
   *
   * @param {Element} el
   *        The DOM element to be styled.
   *
   * @param {string} style
   *        The CSS property on the element that should be styled.
   *
   * @param {string} rule
   *        The style rule that should be applied to the property.
   *
   * @private
   */
  function tryUpdateStyle(el, style, rule) {
    try {
      el.style[style] = rule;
    } catch (e) {

      // Satisfies linter.
      return;
    }
  }

  /**
   * The component for displaying text track cues.
   *
   * @extends Component
   */

  var TextTrackDisplay = function (_Component) {
    inherits(TextTrackDisplay, _Component);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     *
     * @param {Component~ReadyCallback} [ready]
     *        The function to call when `TextTrackDisplay` is ready.
     */
    function TextTrackDisplay(player, options, ready) {
      classCallCheck(this, TextTrackDisplay);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options, ready));

      player.on('loadstart', bind(_this, _this.toggleDisplay));
      player.on('texttrackchange', bind(_this, _this.updateDisplay));
      player.on('loadstart', bind(_this, _this.preselectTrack));

      // This used to be called during player init, but was causing an error
      // if a track should show by default and the display hadn't loaded yet.
      // Should probably be moved to an external track loader when we support
      // tracks that don't need a display.
      player.ready(bind(_this, function () {
        if (player.tech_ && player.tech_.featuresNativeTextTracks) {
          this.hide();
          return;
        }

        player.on('fullscreenchange', bind(this, this.updateDisplay));

        var tracks = this.options_.playerOptions.tracks || [];

        for (var i = 0; i < tracks.length; i++) {
          this.player_.addRemoteTextTrack(tracks[i], true);
        }

        this.preselectTrack();
      }));
      return _this;
    }

    /**
     * Preselect a track following this precedence:
     * - matches the previously selected {@link TextTrack}'s language and kind
     * - matches the previously selected {@link TextTrack}'s language only
     * - is the first default captions track
     * - is the first default descriptions track
     *
     * @listens Player#loadstart
     */


    TextTrackDisplay.prototype.preselectTrack = function preselectTrack() {
      var modes = {captions: 1, subtitles: 1};
      var trackList = this.player_.textTracks();
      var userPref = this.player_.cache_.selectedLanguage;
      var firstDesc = void 0;
      var firstCaptions = void 0;
      var preferredTrack = void 0;

      for (var i = 0; i < trackList.length; i++) {
        var track = trackList[i];

        if (userPref && userPref.enabled && userPref.language === track.language) {
          // Always choose the track that matches both language and kind
          if (track.kind === userPref.kind) {
            preferredTrack = track;
            // or choose the first track that matches language
          } else if (!preferredTrack) {
            preferredTrack = track;
          }

          // clear everything if offTextTrackMenuItem was clicked
        } else if (userPref && !userPref.enabled) {
          preferredTrack = null;
          firstDesc = null;
          firstCaptions = null;
        } else if (track.default) {
          if (track.kind === 'descriptions' && !firstDesc) {
            firstDesc = track;
          } else if (track.kind in modes && !firstCaptions) {
            firstCaptions = track;
          }
        }
      }

      // The preferredTrack matches the user preference and takes
      // precedence over all the other tracks.
      // So, display the preferredTrack before the first default track
      // and the subtitles/captions track before the descriptions track
      if (preferredTrack) {
        preferredTrack.mode = 'showing';
      } else if (firstCaptions) {
        firstCaptions.mode = 'showing';
      } else if (firstDesc) {
        firstDesc.mode = 'showing';
      }
    };

    /**
     * Turn display of {@link TextTrack}'s from the current state into the other state.
     * There are only two states:
     * - 'shown'
     * - 'hidden'
     *
     * @listens Player#loadstart
     */


    TextTrackDisplay.prototype.toggleDisplay = function toggleDisplay() {
      if (this.player_.tech_ && this.player_.tech_.featuresNativeTextTracks) {
        this.hide();
      } else {
        this.show();
      }
    };

    /**
     * Create the {@link Component}'s DOM element.
     *
     * @return {Element}
     *         The element that was created.
     */


    TextTrackDisplay.prototype.createEl = function createEl() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-text-track-display'
      }, {
        'aria-live': 'off',
        'aria-atomic': 'true'
      });
    };

    /**
     * Clear all displayed {@link TextTrack}s.
     */


    TextTrackDisplay.prototype.clearDisplay = function clearDisplay() {
      if (typeof window_1.WebVTT === 'function') {
        window_1.WebVTT.processCues(window_1, [], this.el_);
      }
    };

    /**
     * Update the displayed TextTrack when a either a {@link Player#texttrackchange} or
     * a {@link Player#fullscreenchange} is fired.
     *
     * @listens Player#texttrackchange
     * @listens Player#fullscreenchange
     */


    TextTrackDisplay.prototype.updateDisplay = function updateDisplay() {
      var tracks = this.player_.textTracks();

      this.clearDisplay();

      // Track display prioritization model: if multiple tracks are 'showing',
      //  display the first 'subtitles' or 'captions' track which is 'showing',
      //  otherwise display the first 'descriptions' track which is 'showing'

      var descriptionsTrack = null;
      var captionsSubtitlesTrack = null;
      var i = tracks.length;

      while (i--) {
        var track = tracks[i];

        if (track.mode === 'showing') {
          if (track.kind === 'descriptions') {
            descriptionsTrack = track;
          } else {
            captionsSubtitlesTrack = track;
          }
        }
      }

      if (captionsSubtitlesTrack) {
        if (this.getAttribute('aria-live') !== 'off') {
          this.setAttribute('aria-live', 'off');
        }
        this.updateForTrack(captionsSubtitlesTrack);
      } else if (descriptionsTrack) {
        if (this.getAttribute('aria-live') !== 'assertive') {
          this.setAttribute('aria-live', 'assertive');
        }
        this.updateForTrack(descriptionsTrack);
      }
    };

    /**
     * Add an {@link TextTrack} to to the {@link Tech}s {@link TextTrackList}.
     *
     * @param {TextTrack} track
     *        Text track object to be added to the list.
     */


    TextTrackDisplay.prototype.updateForTrack = function updateForTrack(track) {
      if (typeof window_1.WebVTT !== 'function' || !track.activeCues) {
        return;
      }

      var cues = [];

      for (var _i = 0; _i < track.activeCues.length; _i++) {
        cues.push(track.activeCues[_i]);
      }

      window_1.WebVTT.processCues(window_1, cues, this.el_);

      if (!this.player_.textTrackSettings) {
        return;
      }

      var overrides = this.player_.textTrackSettings.getValues();

      var i = cues.length;

      while (i--) {
        var cue = cues[i];

        if (!cue) {
          continue;
        }

        var cueDiv = cue.displayState;

        if (overrides.color) {
          cueDiv.firstChild.style.color = overrides.color;
        }
        if (overrides.textOpacity) {
          tryUpdateStyle(cueDiv.firstChild, 'color', constructColor(overrides.color || '#fff', overrides.textOpacity));
        }
        if (overrides.backgroundColor) {
          cueDiv.firstChild.style.backgroundColor = overrides.backgroundColor;
        }
        if (overrides.backgroundOpacity) {
          tryUpdateStyle(cueDiv.firstChild, 'backgroundColor', constructColor(overrides.backgroundColor || '#000', overrides.backgroundOpacity));
        }
        if (overrides.windowColor) {
          if (overrides.windowOpacity) {
            tryUpdateStyle(cueDiv, 'backgroundColor', constructColor(overrides.windowColor, overrides.windowOpacity));
          } else {
            cueDiv.style.backgroundColor = overrides.windowColor;
          }
        }
        if (overrides.edgeStyle) {
          if (overrides.edgeStyle === 'dropshadow') {
            cueDiv.firstChild.style.textShadow = '2px 2px 3px ' + darkGray + ', 2px 2px 4px ' + darkGray + ', 2px 2px 5px ' + darkGray;
          } else if (overrides.edgeStyle === 'raised') {
            cueDiv.firstChild.style.textShadow = '1px 1px ' + darkGray + ', 2px 2px ' + darkGray + ', 3px 3px ' + darkGray;
          } else if (overrides.edgeStyle === 'depressed') {
            cueDiv.firstChild.style.textShadow = '1px 1px ' + lightGray + ', 0 1px ' + lightGray + ', -1px -1px ' + darkGray + ', 0 -1px ' + darkGray;
          } else if (overrides.edgeStyle === 'uniform') {
            cueDiv.firstChild.style.textShadow = '0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray;
          }
        }
        if (overrides.fontPercent && overrides.fontPercent !== 1) {
          var fontSize = window_1.parseFloat(cueDiv.style.fontSize);

          cueDiv.style.fontSize = fontSize * overrides.fontPercent + 'px';
          cueDiv.style.height = 'auto';
          cueDiv.style.top = 'auto';
          cueDiv.style.bottom = '2px';
        }
        if (overrides.fontFamily && overrides.fontFamily !== 'default') {
          if (overrides.fontFamily === 'small-caps') {
            cueDiv.firstChild.style.fontVariant = 'small-caps';
          } else {
            cueDiv.firstChild.style.fontFamily = fontMap[overrides.fontFamily];
          }
        }
      }
    };

    return TextTrackDisplay;
  }(Component);

  Component.registerComponent('TextTrackDisplay', TextTrackDisplay);

  /**
   * @file loading-spinner.js
   */

  /**
   * A loading spinner for use during waiting/loading events.
   *
   * @extends Component
   */

  var LoadingSpinner = function (_Component) {
    inherits(LoadingSpinner, _Component);

    function LoadingSpinner() {
      classCallCheck(this, LoadingSpinner);
      return possibleConstructorReturn(this, _Component.apply(this, arguments));
    }

    /**
     * Create the `LoadingSpinner`s DOM element.
     *
     * @return {Element}
     *         The dom element that gets created.
     */
    LoadingSpinner.prototype.createEl = function createEl$$1() {
      var isAudio = this.player_.isAudio();
      var playerType = this.localize(isAudio ? 'Audio Player' : 'Video Player');
      var controlText = createEl('span', {
        className: 'vjs-control-text',
        innerHTML: this.localize('{1} is loading.', [playerType])
      });

      var el = _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-loading-spinner',
        dir: 'ltr'
      });

      el.appendChild(controlText);

      return el;
    };

    return LoadingSpinner;
  }(Component);

  Component.registerComponent('LoadingSpinner', LoadingSpinner);

  /**
   * @file button.js
   */

  /**
   * Base class for all buttons.
   *
   * @extends ClickableComponent
   */

  var Button = function (_ClickableComponent) {
    inherits(Button, _ClickableComponent);

    function Button() {
      classCallCheck(this, Button);
      return possibleConstructorReturn(this, _ClickableComponent.apply(this, arguments));
    }

    /**
     * Create the `Button`s DOM element.
     *
     * @param {string} [tag="button"]
     *        The element's node type. This argument is IGNORED: no matter what
     *        is passed, it will always create a `button` element.
     *
     * @param {Object} [props={}]
     *        An object of properties that should be set on the element.
     *
     * @param {Object} [attributes={}]
     *        An object of attributes that should be set on the element.
     *
     * @return {Element}
     *         The element that gets created.
     */
    Button.prototype.createEl = function createEl(tag) {
      var props = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

      tag = 'button';

      props = assign({
        innerHTML: '<span aria-hidden="true" class="vjs-icon-placeholder"></span>',
        className: this.buildCSSClass()
      }, props);

      // Add attributes for button element
      attributes = assign({

        // Necessary since the default button type is "submit"
        type: 'button'
      }, attributes);

      var el = Component.prototype.createEl.call(this, tag, props, attributes);

      this.createControlTextEl(el);

      return el;
    };

    /**
     * Add a child `Component` inside of this `Button`.
     *
     * @param {string|Component} child
     *        The name or instance of a child to add.
     *
     * @param {Object} [options={}]
     *        The key/value store of options that will get passed to children of
     *        the child.
     *
     * @return {Component}
     *         The `Component` that gets added as a child. When using a string the
     *         `Component` will get created by this process.
     *
     * @deprecated since version 5
     */


    Button.prototype.addChild = function addChild(child) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

      var className = this.constructor.name;

      log$1.warn('Adding an actionable (user controllable) child to a Button (' + className + ') is not supported; use a ClickableComponent instead.');

      // Avoid the error message generated by ClickableComponent's addChild method
      return Component.prototype.addChild.call(this, child, options);
    };

    /**
     * Enable the `Button` element so that it can be activated or clicked. Use this with
     * {@link Button#disable}.
     */


    Button.prototype.enable = function enable() {
      _ClickableComponent.prototype.enable.call(this);
      this.el_.removeAttribute('disabled');
    };

    /**
     * Disable the `Button` element so that it cannot be activated or clicked. Use this with
     * {@link Button#enable}.
     */


    Button.prototype.disable = function disable() {
      _ClickableComponent.prototype.disable.call(this);
      this.el_.setAttribute('disabled', 'disabled');
    };

    /**
     * This gets called when a `Button` has focus and `keydown` is triggered via a key
     * press.
     *
     * @param {EventTarget~Event} event
     *        The event that caused this function to get called.
     *
     * @listens keydown
     */


    Button.prototype.handleKeyPress = function handleKeyPress(event) {

      // Ignore Space (32) or Enter (13) key operation, which is handled by the browser for a button.
      if (event.which === 32 || event.which === 13) {
        return;
      }

      // Pass keypress handling up for unsupported keys
      _ClickableComponent.prototype.handleKeyPress.call(this, event);
    };

    return Button;
  }(ClickableComponent);

  Component.registerComponent('Button', Button);

  /**
   * @file big-playOld-button.js
   */

  /**
   * The initial playOld button that shows before the video has played. The hiding of the
   * `BigPlayButton` get done via CSS and `Player` states.
   *
   * @extends Button
   */

  var BigPlayButton = function (_Button) {
    inherits(BigPlayButton, _Button);

    function BigPlayButton(player, options) {
      classCallCheck(this, BigPlayButton);

      var _this = possibleConstructorReturn(this, _Button.call(this, player, options));

      _this.mouseused_ = false;

      _this.on('mousedown', _this.handleMouseDown);
      return _this;
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object. Always returns 'vjs-big-playOld-button'.
     */


    BigPlayButton.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-big-playOld-button';
    };

    /**
     * This gets called when a `BigPlayButton` "clicked". See {@link ClickableComponent}
     * for more detailed information on what a click can be.
     *
     * @param {EventTarget~Event} event
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    BigPlayButton.prototype.handleClick = function handleClick(event) {
      var playPromise = this.player_.play();

      // exit early if clicked via the mouse
      if (this.mouseused_ && event.clientX && event.clientY) {
        return;
      }

      var cb = this.player_.getChild('controlBar');
      var playToggle = cb && cb.getChild('playToggle');

      if (!playToggle) {
        this.player_.focus();
        return;
      }

      var playFocus = function playFocus() {
        return playToggle.focus();
      };

      if (isPromise(playPromise)) {
        playPromise.then(playFocus, function () {
        });
      } else {
        this.setTimeout(playFocus, 1);
      }
    };

    BigPlayButton.prototype.handleKeyPress = function handleKeyPress(event) {
      this.mouseused_ = false;

      _Button.prototype.handleKeyPress.call(this, event);
    };

    BigPlayButton.prototype.handleMouseDown = function handleMouseDown(event) {
      this.mouseused_ = true;
    };

    return BigPlayButton;
  }(Button);

  /**
   * The text that should display over the `BigPlayButton`s controls. Added to for localization.
   *
   * @type {string}
   * @private
   */


  BigPlayButton.prototype.controlText_ = 'Play Video';

  Component.registerComponent('BigPlayButton', BigPlayButton);

  /**
   * @file close-button.js
   */

  /**
   * The `CloseButton` is a `{@link Button}` that fires a `close` event when
   * it gets clicked.
   *
   * @extends Button
   */

  var CloseButton = function (_Button) {
    inherits(CloseButton, _Button);

    /**
     * Creates an instance of the this class.
     *
     * @param  {Player} player
     *         The `Player` that this class should be attached to.
     *
     * @param  {Object} [options]
     *         The key/value store of player options.
     */
    function CloseButton(player, options) {
      classCallCheck(this, CloseButton);

      var _this = possibleConstructorReturn(this, _Button.call(this, player, options));

      _this.controlText(options && options.controlText || _this.localize('Close'));
      return _this;
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    CloseButton.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-close-button ' + _Button.prototype.buildCSSClass.call(this);
    };

    /**
     * This gets called when a `CloseButton` gets clicked. See
     * {@link ClickableComponent#handleClick} for more information on when this will be
     * triggered
     *
     * @param {EventTarget~Event} event
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     * @fires CloseButton#close
     */


    CloseButton.prototype.handleClick = function handleClick(event) {

      /**
       * Triggered when the a `CloseButton` is clicked.
       *
       * @event CloseButton#close
       * @type {EventTarget~Event}
       *
       * @property {boolean} [bubbles=false]
       *           set to false so that the close event does not
       *           bubble up to parents if there is no listener
       */
      this.trigger({type: 'close', bubbles: false});
    };

    return CloseButton;
  }(Button);

  Component.registerComponent('CloseButton', CloseButton);

  /**
   * @file playOld-toggle.js
   */

  /**
   * Button to toggle between playOld and pause.
   *
   * @extends Button
   */

  var PlayToggle = function (_Button) {
    inherits(PlayToggle, _Button);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function PlayToggle(player, options) {
      classCallCheck(this, PlayToggle);

      var _this = possibleConstructorReturn(this, _Button.call(this, player, options));

      _this.on(player, 'play', _this.handlePlay);
      _this.on(player, 'pause', _this.handlePause);
      _this.on(player, 'ended', _this.handleEnded);
      return _this;
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    PlayToggle.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-playOld-control ' + _Button.prototype.buildCSSClass.call(this);
    };

    /**
     * This gets called when an `PlayToggle` is "clicked". See
     * {@link ClickableComponent} for more detailed information on what a click can be.
     *
     * @param {EventTarget~Event} [event]
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    PlayToggle.prototype.handleClick = function handleClick(event) {
      if (this.player_.paused()) {
        this.player_.play();
      } else {
        this.player_.pause();
      }
    };

    /**
     * This gets called once after the video has ended and the user seeks so that
     * we can change the replay button back to a playOld button.
     *
     * @param {EventTarget~Event} [event]
     *        The event that caused this function to run.
     *
     * @listens Player#seeked
     */


    PlayToggle.prototype.handleSeeked = function handleSeeked(event) {
      this.removeClass('vjs-ended');

      if (this.player_.paused()) {
        this.handlePause(event);
      } else {
        this.handlePlay(event);
      }
    };

    /**
     * Add the vjs-playing class to the element so it can change appearance.
     *
     * @param {EventTarget~Event} [event]
     *        The event that caused this function to run.
     *
     * @listens Player#play
     */


    PlayToggle.prototype.handlePlay = function handlePlay(event) {
      this.removeClass('vjs-ended');
      this.removeClass('vjs-paused');
      this.addClass('vjs-playing');
      // change the button text to "Pause"
      this.controlText('Pause');
    };

    /**
     * Add the vjs-paused class to the element so it can change appearance.
     *
     * @param {EventTarget~Event} [event]
     *        The event that caused this function to run.
     *
     * @listens Player#pause
     */


    PlayToggle.prototype.handlePause = function handlePause(event) {
      this.removeClass('vjs-playing');
      this.addClass('vjs-paused');
      // change the button text to "Play"
      this.controlText('Play');
    };

    /**
     * Add the vjs-ended class to the element so it can change appearance
     *
     * @param {EventTarget~Event} [event]
     *        The event that caused this function to run.
     *
     * @listens Player#ended
     */


    PlayToggle.prototype.handleEnded = function handleEnded(event) {
      this.removeClass('vjs-playing');
      this.addClass('vjs-ended');
      // change the button text to "Replay"
      this.controlText('Replay');

      // on the next seek remove the replay button
      this.one(this.player_, 'seeked', this.handleSeeked);
    };

    return PlayToggle;
  }(Button);

  /**
   * The text that should display over the `PlayToggle`s controls. Added for localization.
   *
   * @type {string}
   * @private
   */


  PlayToggle.prototype.controlText_ = 'Play';

  Component.registerComponent('PlayToggle', PlayToggle);

  /**
   * @file format-time.js
   * @module format-time
   */

  /**
   * Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in seconds)
   * will force a number of leading zeros to cover the length of the guide.
   *
   * @param {number} seconds
   *        Number of seconds to be turned into a string
   *
   * @param {number} guide
   *        Number (in seconds) to model the string after
   *
   * @return {string}
   *         Time formatted as H:MM:SS or M:SS
   */
  var defaultImplementation = function defaultImplementation(seconds, guide) {
    seconds = seconds < 0 ? 0 : seconds;
    var s = Math.floor(seconds % 60);
    var m = Math.floor(seconds / 60 % 60);
    var h = Math.floor(seconds / 3600);
    var gm = Math.floor(guide / 60 % 60);
    var gh = Math.floor(guide / 3600);

    // handle invalid times
    if (isNaN(seconds) || seconds === Infinity) {
      // '-' is false for all relational operators (e.g. <, >=) so this setting
      // will add the minimum number of fields specified by the guide
      h = m = s = '-';
    }

    // Check if we need to show hours
    h = h > 0 || gh > 0 ? h + ':' : '';

    // If hours are showing, we may need to add a leading zero.
    // Always show at least one digit of minutes.
    m = ((h || gm >= 10) && m < 10 ? '0' + m : m) + ':';

    // Check if leading zero is need for seconds
    s = s < 10 ? '0' + s : s;

    return h + m + s;
  };

  var implementation = defaultImplementation;

  /**
   * Replaces the default formatTime implementation with a custom implementation.
   *
   * @param {Function} customImplementation
   *        A function which will be used in place of the default formatTime implementation.
   *        Will receive the current time in seconds and the guide (in seconds) as arguments.
   */
  function setFormatTime(customImplementation) {
    implementation = customImplementation;
  }

  /**
   * Resets formatTime to the default implementation.
   */
  function resetFormatTime() {
    implementation = defaultImplementation;
  }

  function formatTime(seconds) {
    var guide = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : seconds;

    return implementation(seconds, guide);
  }

  /**
   * @file time-display.js
   */

  /**
   * Displays the time left in the video
   *
   * @extends Component
   */

  var TimeDisplay = function (_Component) {
    inherits(TimeDisplay, _Component);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function TimeDisplay(player, options) {
      classCallCheck(this, TimeDisplay);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      _this.throttledUpdateContent = throttle(bind(_this, _this.updateContent), 25);
      _this.on(player, 'timeupdate', _this.throttledUpdateContent);
      return _this;
    }

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    TimeDisplay.prototype.createEl = function createEl$$1(plainName) {
      var className = this.buildCSSClass();
      var el = _Component.prototype.createEl.call(this, 'div', {
        className: className + ' vjs-time-control vjs-control',
        innerHTML: '<span class="vjs-control-text">' + this.localize(this.labelText_) + '\xA0</span>'
      });

      this.contentEl_ = createEl('span', {
        className: className + '-display'
      }, {
        // tell screen readers not to automatically read the time as it changes
        'aria-live': 'off'
      });

      this.updateTextNode_();
      el.appendChild(this.contentEl_);
      return el;
    };

    TimeDisplay.prototype.dispose = function dispose() {
      this.contentEl_ = null;
      this.textNode_ = null;

      _Component.prototype.dispose.call(this);
    };

    /**
     * Updates the "remaining time" text node with new content using the
     * contents of the `formattedTime_` property.
     *
     * @private
     */


    TimeDisplay.prototype.updateTextNode_ = function updateTextNode_() {
      if (!this.contentEl_) {
        return;
      }

      while (this.contentEl_.firstChild) {
        this.contentEl_.removeChild(this.contentEl_.firstChild);
      }

      this.textNode_ = document_1.createTextNode(this.formattedTime_ || this.formatTime_(0));
      this.contentEl_.appendChild(this.textNode_);
    };

    /**
     * Generates a formatted time for this component to use in display.
     *
     * @param  {number} time
     *         A numeric time, in seconds.
     *
     * @return {string}
     *         A formatted time
     *
     * @private
     */


    TimeDisplay.prototype.formatTime_ = function formatTime_(time) {
      return formatTime(time);
    };

    /**
     * Updates the time display text node if it has what was passed in changed
     * the formatted time.
     *
     * @param {number} time
     *        The time to update to
     *
     * @private
     */


    TimeDisplay.prototype.updateFormattedTime_ = function updateFormattedTime_(time) {
      var formattedTime = this.formatTime_(time);

      if (formattedTime === this.formattedTime_) {
        return;
      }

      this.formattedTime_ = formattedTime;
      this.requestAnimationFrame(this.updateTextNode_);
    };

    /**
     * To be filled out in the child class, should update the displayed time
     * in accordance with the fact that the current time has changed.
     *
     * @param {EventTarget~Event} [event]
     *        The `timeupdate`  event that caused this to run.
     *
     * @listens Player#timeupdate
     */


    TimeDisplay.prototype.updateContent = function updateContent(event) {
    };

    return TimeDisplay;
  }(Component);

  /**
   * The text that is added to the `TimeDisplay` for screen reader users.
   *
   * @type {string}
   * @private
   */


  TimeDisplay.prototype.labelText_ = 'Time';

  /**
   * The text that should display over the `TimeDisplay`s controls. Added to for localization.
   *
   * @type {string}
   * @private
   *
   * @deprecated in v7; controlText_ is not used in non-active display Components
   */
  TimeDisplay.prototype.controlText_ = 'Time';

  Component.registerComponent('TimeDisplay', TimeDisplay);

  /**
   * @file current-time-display.js
   */

  /**
   * Displays the current time
   *
   * @extends Component
   */

  var CurrentTimeDisplay = function (_TimeDisplay) {
    inherits(CurrentTimeDisplay, _TimeDisplay);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function CurrentTimeDisplay(player, options) {
      classCallCheck(this, CurrentTimeDisplay);

      var _this = possibleConstructorReturn(this, _TimeDisplay.call(this, player, options));

      _this.on(player, 'ended', _this.handleEnded);
      return _this;
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    CurrentTimeDisplay.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-current-time';
    };

    /**
     * Update current time display
     *
     * @param {EventTarget~Event} [event]
     *        The `timeupdate` event that caused this function to run.
     *
     * @listens Player#timeupdate
     */


    CurrentTimeDisplay.prototype.updateContent = function updateContent(event) {
      // Allows for smooth scrubbing, when player can't keep up.
      var time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();

      this.updateFormattedTime_(time);
    };

    /**
     * When the player fires ended there should be no time left. Sadly
     * this is not always the case, lets make it seem like that is the case
     * for users.
     *
     * @param {EventTarget~Event} [event]
     *        The `ended` event that caused this to run.
     *
     * @listens Player#ended
     */


    CurrentTimeDisplay.prototype.handleEnded = function handleEnded(event) {
      if (!this.player_.duration()) {
        return;
      }
      this.updateFormattedTime_(this.player_.duration());
    };

    return CurrentTimeDisplay;
  }(TimeDisplay);

  /**
   * The text that is added to the `CurrentTimeDisplay` for screen reader users.
   *
   * @type {string}
   * @private
   */


  CurrentTimeDisplay.prototype.labelText_ = 'Current Time';

  /**
   * The text that should display over the `CurrentTimeDisplay`s controls. Added to for localization.
   *
   * @type {string}
   * @private
   *
   * @deprecated in v7; controlText_ is not used in non-active display Components
   */
  CurrentTimeDisplay.prototype.controlText_ = 'Current Time';

  Component.registerComponent('CurrentTimeDisplay', CurrentTimeDisplay);

  /**
   * @file duration-display.js
   */

  /**
   * Displays the duration
   *
   * @extends Component
   */

  var DurationDisplay = function (_TimeDisplay) {
    inherits(DurationDisplay, _TimeDisplay);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function DurationDisplay(player, options) {
      classCallCheck(this, DurationDisplay);

      // we do not want to/need to throttle duration changes,
      // as they should always display the changed duration as
      // it has changed
      var _this = possibleConstructorReturn(this, _TimeDisplay.call(this, player, options));

      _this.on(player, 'durationchange', _this.updateContent);

      // Also listen for timeupdate (in the parent) and loadedmetadata because removing those
      // listeners could have broken dependent applications/libraries. These
      // can likely be removed for 7.0.
      _this.on(player, 'loadedmetadata', _this.throttledUpdateContent);
      return _this;
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    DurationDisplay.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-duration';
    };

    /**
     * Update duration time display.
     *
     * @param {EventTarget~Event} [event]
     *        The `durationchange`, `timeupdate`, or `loadedmetadata` event that caused
     *        this function to be called.
     *
     * @listens Player#durationchange
     * @listens Player#timeupdate
     * @listens Player#loadedmetadata
     */


    DurationDisplay.prototype.updateContent = function updateContent(event) {
      var duration = this.player_.duration();

      if (duration && this.duration_ !== duration) {
        this.duration_ = duration;
        this.updateFormattedTime_(duration);
      }
    };

    return DurationDisplay;
  }(TimeDisplay);

  /**
   * The text that is added to the `DurationDisplay` for screen reader users.
   *
   * @type {string}
   * @private
   */


  DurationDisplay.prototype.labelText_ = 'Duration';

  /**
   * The text that should display over the `DurationDisplay`s controls. Added to for localization.
   *
   * @type {string}
   * @private
   *
   * @deprecated in v7; controlText_ is not used in non-active display Components
   */
  DurationDisplay.prototype.controlText_ = 'Duration';

  Component.registerComponent('DurationDisplay', DurationDisplay);

  /**
   * @file time-divider.js
   */

  /**
   * The separator between the current time and duration.
   * Can be hidden if it's not needed in the design.
   *
   * @extends Component
   */

  var TimeDivider = function (_Component) {
    inherits(TimeDivider, _Component);

    function TimeDivider() {
      classCallCheck(this, TimeDivider);
      return possibleConstructorReturn(this, _Component.apply(this, arguments));
    }

    /**
     * Create the component's DOM element
     *
     * @return {Element}
     *         The element that was created.
     */
    TimeDivider.prototype.createEl = function createEl() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-time-control vjs-time-divider',
        innerHTML: '<div><span>/</span></div>'
      });
    };

    return TimeDivider;
  }(Component);

  Component.registerComponent('TimeDivider', TimeDivider);

  /**
   * @file remaining-time-display.js
   */
  /**
   * Displays the time left in the video
   *
   * @extends Component
   */

  var RemainingTimeDisplay = function (_TimeDisplay) {
    inherits(RemainingTimeDisplay, _TimeDisplay);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function RemainingTimeDisplay(player, options) {
      classCallCheck(this, RemainingTimeDisplay);

      var _this = possibleConstructorReturn(this, _TimeDisplay.call(this, player, options));

      _this.on(player, 'durationchange', _this.throttledUpdateContent);
      _this.on(player, 'ended', _this.handleEnded);
      return _this;
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    RemainingTimeDisplay.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-remaining-time';
    };

    /**
     * The remaining time display prefixes numbers with a "minus" character.
     *
     * @param  {number} time
     *         A numeric time, in seconds.
     *
     * @return {string}
     *         A formatted time
     *
     * @private
     */


    RemainingTimeDisplay.prototype.formatTime_ = function formatTime_(time) {
      // TODO: The "-" should be decorative, and not announced by a screen reader
      return '-' + _TimeDisplay.prototype.formatTime_.call(this, time);
    };

    /**
     * Update remaining time display.
     *
     * @param {EventTarget~Event} [event]
     *        The `timeupdate` or `durationchange` event that caused this to run.
     *
     * @listens Player#timeupdate
     * @listens Player#durationchange
     */


    RemainingTimeDisplay.prototype.updateContent = function updateContent(event) {
      if (!this.player_.duration()) {
        return;
      }

      // @deprecated We should only use remainingTimeDisplay
      // as of video.js 7
      if (this.player_.remainingTimeDisplay) {
        this.updateFormattedTime_(this.player_.remainingTimeDisplay());
      } else {
        this.updateFormattedTime_(this.player_.remainingTime());
      }
    };

    /**
     * When the player fires ended there should be no time left. Sadly
     * this is not always the case, lets make it seem like that is the case
     * for users.
     *
     * @param {EventTarget~Event} [event]
     *        The `ended` event that caused this to run.
     *
     * @listens Player#ended
     */


    RemainingTimeDisplay.prototype.handleEnded = function handleEnded(event) {
      if (!this.player_.duration()) {
        return;
      }
      this.updateFormattedTime_(0);
    };

    return RemainingTimeDisplay;
  }(TimeDisplay);

  /**
   * The text that is added to the `RemainingTimeDisplay` for screen reader users.
   *
   * @type {string}
   * @private
   */


  RemainingTimeDisplay.prototype.labelText_ = 'Remaining Time';

  /**
   * The text that should display over the `RemainingTimeDisplay`s controls. Added to for localization.
   *
   * @type {string}
   * @private
   *
   * @deprecated in v7; controlText_ is not used in non-active display Components
   */
  RemainingTimeDisplay.prototype.controlText_ = 'Remaining Time';

  Component.registerComponent('RemainingTimeDisplay', RemainingTimeDisplay);

  /**
   * @file live-display.js
   */

  // TODO - Future make it click to snap to live

  /**
   * Displays the live indicator when duration is Infinity.
   *
   * @extends Component
   */

  var LiveDisplay = function (_Component) {
    inherits(LiveDisplay, _Component);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function LiveDisplay(player, options) {
      classCallCheck(this, LiveDisplay);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      _this.updateShowing();
      _this.on(_this.player(), 'durationchange', _this.updateShowing);
      return _this;
    }

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    LiveDisplay.prototype.createEl = function createEl$$1() {
      var el = _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-live-control vjs-control'
      });

      this.contentEl_ = createEl('div', {
        className: 'vjs-live-display',
        innerHTML: '<span class="vjs-control-text">' + this.localize('Stream Type') + '\xA0</span>' + this.localize('LIVE')
      }, {
        'aria-live': 'off'
      });

      el.appendChild(this.contentEl_);
      return el;
    };

    LiveDisplay.prototype.dispose = function dispose() {
      this.contentEl_ = null;

      _Component.prototype.dispose.call(this);
    };

    /**
     * Check the duration to see if the LiveDisplay should be showing or not. Then show/hide
     * it accordingly
     *
     * @param {EventTarget~Event} [event]
     *        The {@link Player#durationchange} event that caused this function to run.
     *
     * @listens Player#durationchange
     */


    LiveDisplay.prototype.updateShowing = function updateShowing(event) {
      if (this.player().duration() === Infinity) {
        this.show();
      } else {
        this.hide();
      }
    };

    return LiveDisplay;
  }(Component);

  Component.registerComponent('LiveDisplay', LiveDisplay);

  /**
   * @file slider.js
   */

  /**
   * The base functionality for a slider. Can be vertical or horizontal.
   * For instance the volume bar or the seek bar on a video is a slider.
   *
   * @extends Component
   */

  var Slider = function (_Component) {
    inherits(Slider, _Component);

    /**
     * Create an instance of this class
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function Slider(player, options) {
      classCallCheck(this, Slider);

      // Set property names to bar to match with the child Slider class is looking for
      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      _this.bar = _this.getChild(_this.options_.barName);

      // Set a horizontal or vertical class on the slider depending on the slider type
      _this.vertical(!!_this.options_.vertical);

      _this.enable();
      return _this;
    }

    /**
     * Are controls are currently enabled for this slider or not.
     *
     * @return {boolean}
     *         true if controls are enabled, false otherwise
     */


    Slider.prototype.enabled = function enabled() {
      return this.enabled_;
    };

    /**
     * Enable controls for this slider if they are disabled
     */


    Slider.prototype.enable = function enable() {
      if (this.enabled()) {
        return;
      }

      this.on('mousedown', this.handleMouseDown);
      this.on('touchstart', this.handleMouseDown);
      this.on('focus', this.handleFocus);
      this.on('blur', this.handleBlur);
      this.on('click', this.handleClick);

      this.on(this.player_, 'controlsvisible', this.update);

      if (this.playerEvent) {
        this.on(this.player_, this.playerEvent, this.update);
      }

      this.removeClass('disabled');
      this.setAttribute('tabindex', 0);

      this.enabled_ = true;
    };

    /**
     * Disable controls for this slider if they are enabled
     */


    Slider.prototype.disable = function disable() {
      if (!this.enabled()) {
        return;
      }
      var doc = this.bar.el_.ownerDocument;

      this.off('mousedown', this.handleMouseDown);
      this.off('touchstart', this.handleMouseDown);
      this.off('focus', this.handleFocus);
      this.off('blur', this.handleBlur);
      this.off('click', this.handleClick);
      this.off(this.player_, 'controlsvisible', this.update);
      this.off(doc, 'mousemove', this.handleMouseMove);
      this.off(doc, 'mouseup', this.handleMouseUp);
      this.off(doc, 'touchmove', this.handleMouseMove);
      this.off(doc, 'touchend', this.handleMouseUp);
      this.removeAttribute('tabindex');

      this.addClass('disabled');

      if (this.playerEvent) {
        this.off(this.player_, this.playerEvent, this.update);
      }
      this.enabled_ = false;
    };

    /**
     * Create the `Slider`s DOM element.
     *
     * @param {string} type
     *        Type of element to create.
     *
     * @param {Object} [props={}]
     *        List of properties in Object form.
     *
     * @param {Object} [attributes={}]
     *        list of attributes in Object form.
     *
     * @return {Element}
     *         The element that gets created.
     */


    Slider.prototype.createEl = function createEl$$1(type) {
      var props = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

      // Add the slider element class to all sub classes
      props.className = props.className + ' vjs-slider';
      props = assign({
        tabIndex: 0
      }, props);

      attributes = assign({
        'role': 'slider',
        'aria-valuenow': 0,
        'aria-valuemin': 0,
        'aria-valuemax': 100,
        'tabIndex': 0
      }, attributes);

      return _Component.prototype.createEl.call(this, type, props, attributes);
    };

    /**
     * Handle `mousedown` or `touchstart` events on the `Slider`.
     *
     * @param {EventTarget~Event} event
     *        `mousedown` or `touchstart` event that triggered this function
     *
     * @listens mousedown
     * @listens touchstart
     * @fires Slider#slideractive
     */


    Slider.prototype.handleMouseDown = function handleMouseDown(event) {
      var doc = this.bar.el_.ownerDocument;

      event.preventDefault();
      blockTextSelection();

      this.addClass('vjs-sliding');
      /**
       * Triggered when the slider is in an active state
       *
       * @event Slider#slideractive
       * @type {EventTarget~Event}
       */
      this.trigger('slideractive');

      this.on(doc, 'mousemove', this.handleMouseMove);
      this.on(doc, 'mouseup', this.handleMouseUp);
      this.on(doc, 'touchmove', this.handleMouseMove);
      this.on(doc, 'touchend', this.handleMouseUp);

      this.handleMouseMove(event);
    };

    /**
     * Handle the `mousemove`, `touchmove`, and `mousedown` events on this `Slider`.
     * The `mousemove` and `touchmove` events will only only trigger this function during
     * `mousedown` and `touchstart`. This is due to {@link Slider#handleMouseDown} and
     * {@link Slider#handleMouseUp}.
     *
     * @param {EventTarget~Event} event
     *        `mousedown`, `mousemove`, `touchstart`, or `touchmove` event that triggered
     *        this function
     *
     * @listens mousemove
     * @listens touchmove
     */


    Slider.prototype.handleMouseMove = function handleMouseMove(event) {
    };

    /**
     * Handle `mouseup` or `touchend` events on the `Slider`.
     *
     * @param {EventTarget~Event} event
     *        `mouseup` or `touchend` event that triggered this function.
     *
     * @listens touchend
     * @listens mouseup
     * @fires Slider#sliderinactive
     */


    Slider.prototype.handleMouseUp = function handleMouseUp() {
      var doc = this.bar.el_.ownerDocument;

      unblockTextSelection();

      this.removeClass('vjs-sliding');
      /**
       * Triggered when the slider is no longer in an active state.
       *
       * @event Slider#sliderinactive
       * @type {EventTarget~Event}
       */
      this.trigger('sliderinactive');

      this.off(doc, 'mousemove', this.handleMouseMove);
      this.off(doc, 'mouseup', this.handleMouseUp);
      this.off(doc, 'touchmove', this.handleMouseMove);
      this.off(doc, 'touchend', this.handleMouseUp);

      this.update();
    };

    /**
     * Update the progress bar of the `Slider`.
     *
     * @returns {number}
     *          The percentage of progress the progress bar represents as a
     *          number from 0 to 1.
     */


    Slider.prototype.update = function update() {

      // In VolumeBar init we have a setTimeout for update that pops and update
      // to the end of the execution stack. The player is destroyed before then
      // update will cause an error
      if (!this.el_) {
        return;
      }

      // If scrubbing, we could use a cached value to make the handle keep up
      // with the user's mouse. On HTML5 browsers scrubbing is really smooth, but
      // some flash players are slow, so we might want to utilize this later.
      // var progress =  (this.player_.scrubbing()) ? this.player_.getCache().currentTime / this.player_.duration() : this.player_.currentTime() / this.player_.duration();
      var progress = this.getPercent();
      var bar = this.bar;

      // If there's no bar...
      if (!bar) {
        return;
      }

      // Protect against no duration and other division issues
      if (typeof progress !== 'number' || progress !== progress || progress < 0 || progress === Infinity) {
        progress = 0;
      }

      // Convert to a percentage for setting
      var percentage = (progress * 100).toFixed(2) + '%';
      var style = bar.el().style;

      // Set the new bar width or height
      if (this.vertical()) {
        style.height = percentage;
      } else {
        style.width = percentage;
      }

      return progress;
    };

    /**
     * Calculate distance for slider
     *
     * @param {EventTarget~Event} event
     *        The event that caused this function to run.
     *
     * @return {number}
     *         The current position of the Slider.
     *         - position.x for vertical `Slider`s
     *         - position.y for horizontal `Slider`s
     */


    Slider.prototype.calculateDistance = function calculateDistance(event) {
      var position = getPointerPosition(this.el_, event);

      if (this.vertical()) {
        return position.y;
      }
      return position.x;
    };

    /**
     * Handle a `focus` event on this `Slider`.
     *
     * @param {EventTarget~Event} event
     *        The `focus` event that caused this function to run.
     *
     * @listens focus
     */


    Slider.prototype.handleFocus = function handleFocus() {
      this.on(this.bar.el_.ownerDocument, 'keydown', this.handleKeyPress);
    };

    /**
     * Handle a `keydown` event on the `Slider`. Watches for left, rigth, up, and down
     * arrow keys. This function will only be called when the slider has focus. See
     * {@link Slider#handleFocus} and {@link Slider#handleBlur}.
     *
     * @param {EventTarget~Event} event
     *        the `keydown` event that caused this function to run.
     *
     * @listens keydown
     */


    Slider.prototype.handleKeyPress = function handleKeyPress(event) {
      // Left and Down Arrows
      if (event.which === 37 || event.which === 40) {
        event.preventDefault();
        this.stepBack();

        // Up and Right Arrows
      } else if (event.which === 38 || event.which === 39) {
        event.preventDefault();
        this.stepForward();
      }
    };

    /**
     * Handle a `blur` event on this `Slider`.
     *
     * @param {EventTarget~Event} event
     *        The `blur` event that caused this function to run.
     *
     * @listens blur
     */

    Slider.prototype.handleBlur = function handleBlur() {
      this.off(this.bar.el_.ownerDocument, 'keydown', this.handleKeyPress);
    };

    /**
     * Listener for click events on slider, used to prevent clicks
     *   from bubbling up to parent elements like button menus.
     *
     * @param {Object} event
     *        Event that caused this object to run
     */


    Slider.prototype.handleClick = function handleClick(event) {
      event.stopImmediatePropagation();
      event.preventDefault();
    };

    /**
     * Get/set if slider is horizontal for vertical
     *
     * @param {boolean} [bool]
     *        - true if slider is vertical,
     *        - false is horizontal
     *
     * @return {boolean}
     *         - true if slider is vertical, and getting
     *         - false if the slider is horizontal, and getting
     */


    Slider.prototype.vertical = function vertical(bool) {
      if (bool === undefined) {
        return this.vertical_ || false;
      }

      this.vertical_ = !!bool;

      if (this.vertical_) {
        this.addClass('vjs-slider-vertical');
      } else {
        this.addClass('vjs-slider-horizontal');
      }
    };

    return Slider;
  }(Component);

  Component.registerComponent('Slider', Slider);

  /**
   * @file load-progress-bar.js
   */

  /**
   * Shows loading progress
   *
   * @extends Component
   */

  var LoadProgressBar = function (_Component) {
    inherits(LoadProgressBar, _Component);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function LoadProgressBar(player, options) {
      classCallCheck(this, LoadProgressBar);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      _this.partEls_ = [];
      _this.on(player, 'progress', _this.update);
      return _this;
    }

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    LoadProgressBar.prototype.createEl = function createEl$$1() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-load-progress',
        innerHTML: '<span class="vjs-control-text"><span>' + this.localize('Loaded') + '</span>: 0%</span>'
      });
    };

    LoadProgressBar.prototype.dispose = function dispose() {
      this.partEls_ = null;

      _Component.prototype.dispose.call(this);
    };

    /**
     * Update progress bar
     *
     * @param {EventTarget~Event} [event]
     *        The `progress` event that caused this function to run.
     *
     * @listens Player#progress
     */


    LoadProgressBar.prototype.update = function update(event) {
      var buffered = this.player_.buffered();
      var duration = this.player_.duration();
      var bufferedEnd = this.player_.bufferedEnd();
      var children = this.partEls_;

      // get the percent width of a time compared to the total end
      var percentify = function percentify(time, end) {
        // no NaN
        var percent = time / end || 0;

        return (percent >= 1 ? 1 : percent) * 100 + '%';
      };

      // update the width of the progress bar
      this.el_.style.width = percentify(bufferedEnd, duration);

      // add child elements to represent the individual buffered time ranges
      for (var i = 0; i < buffered.length; i++) {
        var start = buffered.start(i);
        var end = buffered.end(i);
        var part = children[i];

        if (!part) {
          part = this.el_.appendChild(createEl());
          children[i] = part;
        }

        // set the percent based on the width of the progress bar (bufferedEnd)
        part.style.left = percentify(start, bufferedEnd);
        part.style.width = percentify(end - start, bufferedEnd);
      }

      // remove unused buffered range elements
      for (var _i = children.length; _i > buffered.length; _i--) {
        this.el_.removeChild(children[_i - 1]);
      }
      children.length = buffered.length;
    };

    return LoadProgressBar;
  }(Component);

  Component.registerComponent('LoadProgressBar', LoadProgressBar);

  /**
   * @file time-tooltip.js
   */

  /**
   * Time tooltips display a time above the progress bar.
   *
   * @extends Component
   */

  var TimeTooltip = function (_Component) {
    inherits(TimeTooltip, _Component);

    function TimeTooltip() {
      classCallCheck(this, TimeTooltip);
      return possibleConstructorReturn(this, _Component.apply(this, arguments));
    }

    /**
     * Create the time tooltip DOM element
     *
     * @return {Element}
     *         The element that was created.
     */
    TimeTooltip.prototype.createEl = function createEl$$1() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-time-tooltip'
      });
    };

    /**
     * Updates the position of the time tooltip relative to the `SeekBar`.
     *
     * @param {Object} seekBarRect
     *        The `ClientRect` for the {@link SeekBar} element.
     *
     * @param {number} seekBarPoint
     *        A number from 0 to 1, representing a horizontal reference point
     *        from the left edge of the {@link SeekBar}
     */


    TimeTooltip.prototype.update = function update(seekBarRect, seekBarPoint, content) {
      var tooltipRect = getBoundingClientRect(this.el_);
      var playerRect = getBoundingClientRect(this.player_.el());
      var seekBarPointPx = seekBarRect.width * seekBarPoint;

      // do nothing if either rect isn't available
      // for example, if the player isn't in the DOM for testing
      if (!playerRect || !tooltipRect) {
        return;
      }

      // This is the space left of the `seekBarPoint` available within the bounds
      // of the player. We calculate any gap between the left edge of the player
      // and the left edge of the `SeekBar` and add the number of pixels in the
      // `SeekBar` before hitting the `seekBarPoint`
      var spaceLeftOfPoint = seekBarRect.left - playerRect.left + seekBarPointPx;

      // This is the space right of the `seekBarPoint` available within the bounds
      // of the player. We calculate the number of pixels from the `seekBarPoint`
      // to the right edge of the `SeekBar` and add to that any gap between the
      // right edge of the `SeekBar` and the player.
      var spaceRightOfPoint = seekBarRect.width - seekBarPointPx + (playerRect.right - seekBarRect.right);

      // This is the number of pixels by which the tooltip will need to be pulled
      // further to the right to center it over the `seekBarPoint`.
      var pullTooltipBy = tooltipRect.width / 2;

      // Adjust the `pullTooltipBy` distance to the left or right depending on
      // the results of the space calculations above.
      if (spaceLeftOfPoint < pullTooltipBy) {
        pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;
      } else if (spaceRightOfPoint < pullTooltipBy) {
        pullTooltipBy = spaceRightOfPoint;
      }

      // Due to the imprecision of decimal/ratio based calculations and varying
      // rounding behaviors, there are cases where the spacing adjustment is off
      // by a pixel or two. This adds insurance to these calculations.
      if (pullTooltipBy < 0) {
        pullTooltipBy = 0;
      } else if (pullTooltipBy > tooltipRect.width) {
        pullTooltipBy = tooltipRect.width;
      }

      this.el_.style.right = '-' + pullTooltipBy + 'px';
      textContent(this.el_, content);
    };

    return TimeTooltip;
  }(Component);

  Component.registerComponent('TimeTooltip', TimeTooltip);

  /**
   * @file playOld-progress-bar.js
   */

  /**
   * Used by {@link SeekBar} to display media playback progress as part of the
   * {@link ProgressControl}.
   *
   * @extends Component
   */

  var PlayProgressBar = function (_Component) {
    inherits(PlayProgressBar, _Component);

    function PlayProgressBar() {
      classCallCheck(this, PlayProgressBar);
      return possibleConstructorReturn(this, _Component.apply(this, arguments));
    }

    /**
     * Create the the DOM element for this class.
     *
     * @return {Element}
     *         The element that was created.
     */
    PlayProgressBar.prototype.createEl = function createEl() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-playOld-progress vjs-slider-bar',
        innerHTML: '<span class="vjs-control-text"><span>' + this.localize('Progress') + '</span>: 0%</span>'
      });
    };

    /**
     * Enqueues updates to its own DOM as well as the DOM of its
     * {@link TimeTooltip} child.
     *
     * @param {Object} seekBarRect
     *        The `ClientRect` for the {@link SeekBar} element.
     *
     * @param {number} seekBarPoint
     *        A number from 0 to 1, representing a horizontal reference point
     *        from the left edge of the {@link SeekBar}
     */


    PlayProgressBar.prototype.update = function update(seekBarRect, seekBarPoint) {
      var _this2 = this;

      // If there is an existing rAF ID, cancel it so we don't over-queue.
      if (this.rafId_) {
        this.cancelAnimationFrame(this.rafId_);
      }

      this.rafId_ = this.requestAnimationFrame(function () {
        var time = _this2.player_.scrubbing() ? _this2.player_.getCache().currentTime : _this2.player_.currentTime();

        var content = formatTime(time, _this2.player_.duration());
        var timeTooltip = _this2.getChild('timeTooltip');

        if (timeTooltip) {
          timeTooltip.update(seekBarRect, seekBarPoint, content);
        }
      });
    };

    return PlayProgressBar;
  }(Component);

  /**
   * Default options for {@link PlayProgressBar}.
   *
   * @type {Object}
   * @private
   */


  PlayProgressBar.prototype.options_ = {
    children: []
  };

  // Time tooltips should not be added to a player on mobile devices
  if (!IS_IOS && !IS_ANDROID) {
    PlayProgressBar.prototype.options_.children.push('timeTooltip');
  }

  Component.registerComponent('PlayProgressBar', PlayProgressBar);

  /**
   * @file mouse-time-display.js
   */

  /**
   * The {@link MouseTimeDisplay} component tracks mouse movement over the
   * {@link ProgressControl}. It displays an indicator and a {@link TimeTooltip}
   * indicating the time which is represented by a given point in the
   * {@link ProgressControl}.
   *
   * @extends Component
   */

  var MouseTimeDisplay = function (_Component) {
    inherits(MouseTimeDisplay, _Component);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The {@link Player} that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function MouseTimeDisplay(player, options) {
      classCallCheck(this, MouseTimeDisplay);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      _this.update = throttle(bind(_this, _this.update), 25);
      return _this;
    }

    /**
     * Create the DOM element for this class.
     *
     * @return {Element}
     *         The element that was created.
     */


    MouseTimeDisplay.prototype.createEl = function createEl() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-mouse-display'
      });
    };

    /**
     * Enqueues updates to its own DOM as well as the DOM of its
     * {@link TimeTooltip} child.
     *
     * @param {Object} seekBarRect
     *        The `ClientRect` for the {@link SeekBar} element.
     *
     * @param {number} seekBarPoint
     *        A number from 0 to 1, representing a horizontal reference point
     *        from the left edge of the {@link SeekBar}
     */


    MouseTimeDisplay.prototype.update = function update(seekBarRect, seekBarPoint) {
      var _this2 = this;

      // If there is an existing rAF ID, cancel it so we don't over-queue.
      if (this.rafId_) {
        this.cancelAnimationFrame(this.rafId_);
      }

      this.rafId_ = this.requestAnimationFrame(function () {
        var duration = _this2.player_.duration();
        var content = formatTime(seekBarPoint * duration, duration);

        _this2.el_.style.left = seekBarRect.width * seekBarPoint + 'px';
        _this2.getChild('timeTooltip').update(seekBarRect, seekBarPoint, content);
      });
    };

    return MouseTimeDisplay;
  }(Component);

  /**
   * Default options for `MouseTimeDisplay`
   *
   * @type {Object}
   * @private
   */


  MouseTimeDisplay.prototype.options_ = {
    children: ['timeTooltip']
  };

  Component.registerComponent('MouseTimeDisplay', MouseTimeDisplay);

  /**
   * @file seek-bar.js
   */

    // The number of seconds the `step*` functions move the timeline.
  var STEP_SECONDS = 5;

  // The interval at which the bar should update as it progresses.
  var UPDATE_REFRESH_INTERVAL = 30;

  /**
   * Seek bar and container for the progress bars. Uses {@link PlayProgressBar}
   * as its `bar`.
   *
   * @extends Slider
   */

  var SeekBar = function (_Slider) {
    inherits(SeekBar, _Slider);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function SeekBar(player, options) {
      classCallCheck(this, SeekBar);

      var _this = possibleConstructorReturn(this, _Slider.call(this, player, options));

      _this.setEventHandlers_();
      return _this;
    }

    /**
     * Sets the event handlers
     *
     * @private
     */


    SeekBar.prototype.setEventHandlers_ = function setEventHandlers_() {
      var _this2 = this;

      this.update = throttle(bind(this, this.update), UPDATE_REFRESH_INTERVAL);

      this.on(this.player_, 'timeupdate', this.update);
      this.on(this.player_, 'ended', this.handleEnded);

      // when playing, let's ensure we smoothly update the playOld progress bar
      // via an interval
      this.updateInterval = null;

      this.on(this.player_, ['playing'], function () {
        _this2.clearInterval(_this2.updateInterval);

        _this2.updateInterval = _this2.setInterval(function () {
          _this2.requestAnimationFrame(function () {
            _this2.update();
          });
        }, UPDATE_REFRESH_INTERVAL);
      });

      this.on(this.player_, ['ended', 'pause', 'waiting'], function () {
        _this2.clearInterval(_this2.updateInterval);
      });

      this.on(this.player_, ['timeupdate', 'ended'], this.update);
    };

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    SeekBar.prototype.createEl = function createEl$$1() {
      return _Slider.prototype.createEl.call(this, 'div', {
        className: 'vjs-progress-holder'
      }, {
        'aria-label': this.localize('Progress Bar')
      });
    };

    /**
     * This function updates the playOld progress bar and accessibility
     * attributes to whatever is passed in.
     *
     * @param {number} currentTime
     *        The currentTime value that should be used for accessibility
     *
     * @param {number} percent
     *        The percentage as a decimal that the bar should be filled from 0-1.
     *
     * @private
     */


    SeekBar.prototype.update_ = function update_(currentTime, percent) {
      var duration = this.player_.duration();

      // machine readable value of progress bar (percentage complete)
      this.el_.setAttribute('aria-valuenow', (percent * 100).toFixed(2));

      // human readable value of progress bar (time complete)
      this.el_.setAttribute('aria-valuetext', this.localize('progress bar timing: currentTime={1} duration={2}', [formatTime(currentTime, duration), formatTime(duration, duration)], '{1} of {2}'));

      // Update the `PlayProgressBar`.
      this.bar.update(getBoundingClientRect(this.el_), percent);
    };

    /**
     * Update the seek bar's UI.
     *
     * @param {EventTarget~Event} [event]
     *        The `timeupdate` or `ended` event that caused this to run.
     *
     * @listens Player#timeupdate
     *
     * @returns {number}
     *          The current percent at a number from 0-1
     */


    SeekBar.prototype.update = function update(event) {
      var percent = _Slider.prototype.update.call(this);

      this.update_(this.getCurrentTime_(), percent);
      return percent;
    };

    /**
     * Get the value of current time but allows for smooth scrubbing,
     * when player can't keep up.
     *
     * @return {number}
     *         The current time value to display
     *
     * @private
     */


    SeekBar.prototype.getCurrentTime_ = function getCurrentTime_() {
      return this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();
    };

    /**
     * We want the seek bar to be full on ended
     * no matter what the actual internal values are. so we force it.
     *
     * @param {EventTarget~Event} [event]
     *        The `timeupdate` or `ended` event that caused this to run.
     *
     * @listens Player#ended
     */


    SeekBar.prototype.handleEnded = function handleEnded(event) {
      this.update_(this.player_.duration(), 1);
    };

    /**
     * Get the percentage of media played so far.
     *
     * @return {number}
     *         The percentage of media played so far (0 to 1).
     */


    SeekBar.prototype.getPercent = function getPercent() {
      var percent = this.getCurrentTime_() / this.player_.duration();

      return percent >= 1 ? 1 : percent || 0;
    };

    /**
     * Handle mouse down on seek bar
     *
     * @param {EventTarget~Event} event
     *        The `mousedown` event that caused this to run.
     *
     * @listens mousedown
     */


    SeekBar.prototype.handleMouseDown = function handleMouseDown(event) {
      if (!isSingleLeftClick(event)) {
        return;
      }

      // Stop event propagation to prevent double fire in progress-control.js
      event.stopPropagation();
      this.player_.scrubbing(true);

      this.videoWasPlaying = !this.player_.paused();
      this.player_.pause();

      _Slider.prototype.handleMouseDown.call(this, event);
    };

    /**
     * Handle mouse move on seek bar
     *
     * @param {EventTarget~Event} event
     *        The `mousemove` event that caused this to run.
     *
     * @listens mousemove
     */


    SeekBar.prototype.handleMouseMove = function handleMouseMove(event) {
      if (!isSingleLeftClick(event)) {
        return;
      }

      var newTime = this.calculateDistance(event) * this.player_.duration();

      // Don't let video end while scrubbing.
      if (newTime === this.player_.duration()) {
        newTime = newTime - 0.1;
      }

      // Set new time (tell player to seek to new time)
      this.player_.currentTime(newTime);
    };

    SeekBar.prototype.enable = function enable() {
      _Slider.prototype.enable.call(this);
      var mouseTimeDisplay = this.getChild('mouseTimeDisplay');

      if (!mouseTimeDisplay) {
        return;
      }

      mouseTimeDisplay.show();
    };

    SeekBar.prototype.disable = function disable() {
      _Slider.prototype.disable.call(this);
      var mouseTimeDisplay = this.getChild('mouseTimeDisplay');

      if (!mouseTimeDisplay) {
        return;
      }

      mouseTimeDisplay.hide();
    };

    /**
     * Handle mouse up on seek bar
     *
     * @param {EventTarget~Event} event
     *        The `mouseup` event that caused this to run.
     *
     * @listens mouseup
     */


    SeekBar.prototype.handleMouseUp = function handleMouseUp(event) {
      _Slider.prototype.handleMouseUp.call(this, event);

      // Stop event propagation to prevent double fire in progress-control.js
      if (event) {
        event.stopPropagation();
      }
      this.player_.scrubbing(false);

      /**
       * Trigger timeupdate because we're done seeking and the time has changed.
       * This is particularly useful for if the player is paused to time the time displays.
       *
       * @event Tech#timeupdate
       * @type {EventTarget~Event}
       */
      this.player_.trigger({type: 'timeupdate', target: this, manuallyTriggered: true});
      if (this.videoWasPlaying) {
        silencePromise(this.player_.play());
      }
    };

    /**
     * Move more quickly fast forward for keyboard-only users
     */


    SeekBar.prototype.stepForward = function stepForward() {
      this.player_.currentTime(this.player_.currentTime() + STEP_SECONDS);
    };

    /**
     * Move more quickly rewind for keyboard-only users
     */


    SeekBar.prototype.stepBack = function stepBack() {
      this.player_.currentTime(this.player_.currentTime() - STEP_SECONDS);
    };

    /**
     * Toggles the playback state of the player
     * This gets called when enter or space is used on the seekbar
     *
     * @param {EventTarget~Event} event
     *        The `keydown` event that caused this function to be called
     *
     */


    SeekBar.prototype.handleAction = function handleAction(event) {
      if (this.player_.paused()) {
        this.player_.play();
      } else {
        this.player_.pause();
      }
    };

    /**
     * Called when this SeekBar has focus and a key gets pressed down. By
     * default it will call `this.handleAction` when the key is space or enter.
     *
     * @param {EventTarget~Event} event
     *        The `keydown` event that caused this function to be called.
     *
     * @listens keydown
     */


    SeekBar.prototype.handleKeyPress = function handleKeyPress(event) {

      // Support Space (32) or Enter (13) key operation to fire a click event
      if (event.which === 32 || event.which === 13) {
        event.preventDefault();
        this.handleAction(event);
      } else if (_Slider.prototype.handleKeyPress) {

        // Pass keypress handling up for unsupported keys
        _Slider.prototype.handleKeyPress.call(this, event);
      }
    };

    return SeekBar;
  }(Slider);

  /**
   * Default options for the `SeekBar`
   *
   * @type {Object}
   * @private
   */


  SeekBar.prototype.options_ = {
    children: ['loadProgressBar', 'playProgressBar'],
    barName: 'playProgressBar'
  };

  // MouseTimeDisplay tooltips should not be added to a player on mobile devices
  if (!IS_IOS && !IS_ANDROID) {
    SeekBar.prototype.options_.children.splice(1, 0, 'mouseTimeDisplay');
  }

  /**
   * Call the update event for this Slider when this event happens on the player.
   *
   * @type {string}
   */
  SeekBar.prototype.playerEvent = 'timeupdate';

  Component.registerComponent('SeekBar', SeekBar);

  /**
   * @file progress-control.js
   */

  /**
   * The Progress Control component contains the seek bar, load progress,
   * and playOld progress.
   *
   * @extends Component
   */

  var ProgressControl = function (_Component) {
    inherits(ProgressControl, _Component);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function ProgressControl(player, options) {
      classCallCheck(this, ProgressControl);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      _this.handleMouseMove = throttle(bind(_this, _this.handleMouseMove), 25);
      _this.throttledHandleMouseSeek = throttle(bind(_this, _this.handleMouseSeek), 25);

      _this.enable();
      return _this;
    }

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    ProgressControl.prototype.createEl = function createEl$$1() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-progress-control vjs-control'
      });
    };

    /**
     * When the mouse moves over the `ProgressControl`, the pointer position
     * gets passed down to the `MouseTimeDisplay` component.
     *
     * @param {EventTarget~Event} event
     *        The `mousemove` event that caused this function to run.
     *
     * @listen mousemove
     */


    ProgressControl.prototype.handleMouseMove = function handleMouseMove(event) {
      var seekBar = this.getChild('seekBar');

      if (seekBar) {
        var mouseTimeDisplay = seekBar.getChild('mouseTimeDisplay');
        var seekBarEl = seekBar.el();
        var seekBarRect = getBoundingClientRect(seekBarEl);
        var seekBarPoint = getPointerPosition(seekBarEl, event).x;

        // The default skin has a gap on either side of the `SeekBar`. This means
        // that it's possible to trigger this behavior outside the boundaries of
        // the `SeekBar`. This ensures we stay within it at all times.
        if (seekBarPoint > 1) {
          seekBarPoint = 1;
        } else if (seekBarPoint < 0) {
          seekBarPoint = 0;
        }

        if (mouseTimeDisplay) {
          mouseTimeDisplay.update(seekBarRect, seekBarPoint);
        }
      }
    };

    /**
     * A throttled version of the {@link ProgressControl#handleMouseSeek} listener.
     *
     * @method ProgressControl#throttledHandleMouseSeek
     * @param {EventTarget~Event} event
     *        The `mousemove` event that caused this function to run.
     *
     * @listen mousemove
     * @listen touchmove
     */

    /**
     * Handle `mousemove` or `touchmove` events on the `ProgressControl`.
     *
     * @param {EventTarget~Event} event
     *        `mousedown` or `touchstart` event that triggered this function
     *
     * @listens mousemove
     * @listens touchmove
     */


    ProgressControl.prototype.handleMouseSeek = function handleMouseSeek(event) {
      var seekBar = this.getChild('seekBar');

      if (seekBar) {
        seekBar.handleMouseMove(event);
      }
    };

    /**
     * Are controls are currently enabled for this progress control.
     *
     * @return {boolean}
     *         true if controls are enabled, false otherwise
     */


    ProgressControl.prototype.enabled = function enabled() {
      return this.enabled_;
    };

    /**
     * Disable all controls on the progress control and its children
     */


    ProgressControl.prototype.disable = function disable() {
      this.children().forEach(function (child) {
        return child.disable && child.disable();
      });

      if (!this.enabled()) {
        return;
      }

      this.off(['mousedown', 'touchstart'], this.handleMouseDown);
      this.off(this.el_, 'mousemove', this.handleMouseMove);
      this.handleMouseUp();

      this.addClass('disabled');

      this.enabled_ = false;
    };

    /**
     * Enable all controls on the progress control and its children
     */


    ProgressControl.prototype.enable = function enable() {
      this.children().forEach(function (child) {
        return child.enable && child.enable();
      });

      if (this.enabled()) {
        return;
      }

      this.on(['mousedown', 'touchstart'], this.handleMouseDown);
      this.on(this.el_, 'mousemove', this.handleMouseMove);
      this.removeClass('disabled');

      this.enabled_ = true;
    };

    /**
     * Handle `mousedown` or `touchstart` events on the `ProgressControl`.
     *
     * @param {EventTarget~Event} event
     *        `mousedown` or `touchstart` event that triggered this function
     *
     * @listens mousedown
     * @listens touchstart
     */


    ProgressControl.prototype.handleMouseDown = function handleMouseDown(event) {
      var doc = this.el_.ownerDocument;
      var seekBar = this.getChild('seekBar');

      if (seekBar) {
        seekBar.handleMouseDown(event);
      }

      this.on(doc, 'mousemove', this.throttledHandleMouseSeek);
      this.on(doc, 'touchmove', this.throttledHandleMouseSeek);
      this.on(doc, 'mouseup', this.handleMouseUp);
      this.on(doc, 'touchend', this.handleMouseUp);
    };

    /**
     * Handle `mouseup` or `touchend` events on the `ProgressControl`.
     *
     * @param {EventTarget~Event} event
     *        `mouseup` or `touchend` event that triggered this function.
     *
     * @listens touchend
     * @listens mouseup
     */


    ProgressControl.prototype.handleMouseUp = function handleMouseUp(event) {
      var doc = this.el_.ownerDocument;
      var seekBar = this.getChild('seekBar');

      if (seekBar) {
        seekBar.handleMouseUp(event);
      }

      this.off(doc, 'mousemove', this.throttledHandleMouseSeek);
      this.off(doc, 'touchmove', this.throttledHandleMouseSeek);
      this.off(doc, 'mouseup', this.handleMouseUp);
      this.off(doc, 'touchend', this.handleMouseUp);
    };

    return ProgressControl;
  }(Component);

  /**
   * Default options for `ProgressControl`
   *
   * @type {Object}
   * @private
   */


  ProgressControl.prototype.options_ = {
    children: ['seekBar']
  };

  Component.registerComponent('ProgressControl', ProgressControl);

  /**
   * @file fullscreen-toggle.js
   */

  /**
   * Toggle fullscreen video
   *
   * @extends Button
   */

  var FullscreenToggle = function (_Button) {
    inherits(FullscreenToggle, _Button);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function FullscreenToggle(player, options) {
      classCallCheck(this, FullscreenToggle);

      var _this = possibleConstructorReturn(this, _Button.call(this, player, options));

      _this.on(player, 'fullscreenchange', _this.handleFullscreenChange);
      return _this;
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    FullscreenToggle.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-fullscreen-control ' + _Button.prototype.buildCSSClass.call(this);
    };

    /**
     * Handles fullscreenchange on the player and change control text accordingly.
     *
     * @param {EventTarget~Event} [event]
     *        The {@link Player#fullscreenchange} event that caused this function to be
     *        called.
     *
     * @listens Player#fullscreenchange
     */


    FullscreenToggle.prototype.handleFullscreenChange = function handleFullscreenChange(event) {
      if (this.player_.isFullscreen()) {
        this.controlText('Non-Fullscreen');
      } else {
        this.controlText('Fullscreen');
      }
    };

    /**
     * This gets called when an `FullscreenToggle` is "clicked". See
     * {@link ClickableComponent} for more detailed information on what a click can be.
     *
     * @param {EventTarget~Event} [event]
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    FullscreenToggle.prototype.handleClick = function handleClick(event) {
      if (!this.player_.isFullscreen()) {
        this.player_.requestFullscreen();
      } else {
        this.player_.exitFullscreen();
      }
    };

    return FullscreenToggle;
  }(Button);

  /**
   * The text that should display over the `FullscreenToggle`s controls. Added for localization.
   *
   * @type {string}
   * @private
   */


  FullscreenToggle.prototype.controlText_ = 'Fullscreen';

  Component.registerComponent('FullscreenToggle', FullscreenToggle);

  /**
   * Check if volume control is supported and if it isn't hide the
   * `Component` that was passed  using the `vjs-hidden` class.
   *
   * @param {Component} self
   *        The component that should be hidden if volume is unsupported
   *
   * @param {Player} player
   *        A reference to the player
   *
   * @private
   */
  var checkVolumeSupport = function checkVolumeSupport(self, player) {
    // hide volume controls when they're not supported by the current tech
    if (player.tech_ && !player.tech_.featuresVolumeControl) {
      self.addClass('vjs-hidden');
    }

    self.on(player, 'loadstart', function () {
      if (!player.tech_.featuresVolumeControl) {
        self.addClass('vjs-hidden');
      } else {
        self.removeClass('vjs-hidden');
      }
    });
  };

  /**
   * @file volume-level.js
   */

  /**
   * Shows volume level
   *
   * @extends Component
   */

  var VolumeLevel = function (_Component) {
    inherits(VolumeLevel, _Component);

    function VolumeLevel() {
      classCallCheck(this, VolumeLevel);
      return possibleConstructorReturn(this, _Component.apply(this, arguments));
    }

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */
    VolumeLevel.prototype.createEl = function createEl() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-volume-level',
        innerHTML: '<span class="vjs-control-text"></span>'
      });
    };

    return VolumeLevel;
  }(Component);

  Component.registerComponent('VolumeLevel', VolumeLevel);

  /**
   * @file volume-bar.js
   */

  /**
   * The bar that contains the volume level and can be clicked on to adjust the level
   *
   * @extends Slider
   */

  var VolumeBar = function (_Slider) {
    inherits(VolumeBar, _Slider);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function VolumeBar(player, options) {
      classCallCheck(this, VolumeBar);

      var _this = possibleConstructorReturn(this, _Slider.call(this, player, options));

      _this.on('slideractive', _this.updateLastVolume_);
      _this.on(player, 'volumechange', _this.updateARIAAttributes);
      player.ready(function () {
        return _this.updateARIAAttributes();
      });
      return _this;
    }

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    VolumeBar.prototype.createEl = function createEl$$1() {
      return _Slider.prototype.createEl.call(this, 'div', {
        className: 'vjs-volume-bar vjs-slider-bar'
      }, {
        'aria-label': this.localize('Volume Level'),
        'aria-live': 'polite'
      });
    };

    /**
     * Handle mouse down on volume bar
     *
     * @param {EventTarget~Event} event
     *        The `mousedown` event that caused this to run.
     *
     * @listens mousedown
     */


    VolumeBar.prototype.handleMouseDown = function handleMouseDown(event) {
      if (!isSingleLeftClick(event)) {
        return;
      }

      _Slider.prototype.handleMouseDown.call(this, event);
    };

    /**
     * Handle movement events on the {@link VolumeMenuButton}.
     *
     * @param {EventTarget~Event} event
     *        The event that caused this function to run.
     *
     * @listens mousemove
     */


    VolumeBar.prototype.handleMouseMove = function handleMouseMove(event) {
      if (!isSingleLeftClick(event)) {
        return;
      }

      this.checkMuted();
      this.player_.volume(this.calculateDistance(event));
    };

    /**
     * If the player is muted unmute it.
     */


    VolumeBar.prototype.checkMuted = function checkMuted() {
      if (this.player_.muted()) {
        this.player_.muted(false);
      }
    };

    /**
     * Get percent of volume level
     *
     * @return {number}
     *         Volume level percent as a decimal number.
     */


    VolumeBar.prototype.getPercent = function getPercent() {
      if (this.player_.muted()) {
        return 0;
      }
      return this.player_.volume();
    };

    /**
     * Increase volume level for keyboard users
     */


    VolumeBar.prototype.stepForward = function stepForward() {
      this.checkMuted();
      this.player_.volume(this.player_.volume() + 0.1);
    };

    /**
     * Decrease volume level for keyboard users
     */


    VolumeBar.prototype.stepBack = function stepBack() {
      this.checkMuted();
      this.player_.volume(this.player_.volume() - 0.1);
    };

    /**
     * Update ARIA accessibility attributes
     *
     * @param {EventTarget~Event} [event]
     *        The `volumechange` event that caused this function to run.
     *
     * @listens Player#volumechange
     */


    VolumeBar.prototype.updateARIAAttributes = function updateARIAAttributes(event) {
      var ariaValue = this.player_.muted() ? 0 : this.volumeAsPercentage_();

      this.el_.setAttribute('aria-valuenow', ariaValue);
      this.el_.setAttribute('aria-valuetext', ariaValue + '%');
    };

    /**
     * Returns the current value of the player volume as a percentage
     *
     * @private
     */


    VolumeBar.prototype.volumeAsPercentage_ = function volumeAsPercentage_() {
      return Math.round(this.player_.volume() * 100);
    };

    /**
     * When user starts dragging the VolumeBar, store the volume and listen for
     * the end of the drag. When the drag ends, if the volume was set to zero,
     * set lastVolume to the stored volume.
     *
     * @listens slideractive
     * @private
     */


    VolumeBar.prototype.updateLastVolume_ = function updateLastVolume_() {
      var _this2 = this;

      var volumeBeforeDrag = this.player_.volume();

      this.one('sliderinactive', function () {
        if (_this2.player_.volume() === 0) {
          _this2.player_.lastVolume_(volumeBeforeDrag);
        }
      });
    };

    return VolumeBar;
  }(Slider);

  /**
   * Default options for the `VolumeBar`
   *
   * @type {Object}
   * @private
   */


  VolumeBar.prototype.options_ = {
    children: ['volumeLevel'],
    barName: 'volumeLevel'
  };

  /**
   * Call the update event for this Slider when this event happens on the player.
   *
   * @type {string}
   */
  VolumeBar.prototype.playerEvent = 'volumechange';

  Component.registerComponent('VolumeBar', VolumeBar);

  /**
   * @file volume-control.js
   */

  /**
   * The component for controlling the volume level
   *
   * @extends Component
   */

  var VolumeControl = function (_Component) {
    inherits(VolumeControl, _Component);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options={}]
     *        The key/value store of player options.
     */
    function VolumeControl(player) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      classCallCheck(this, VolumeControl);

      options.vertical = options.vertical || false;

      // Pass the vertical option down to the VolumeBar if
      // the VolumeBar is turned on.
      if (typeof options.volumeBar === 'undefined' || isPlain(options.volumeBar)) {
        options.volumeBar = options.volumeBar || {};
        options.volumeBar.vertical = options.vertical;
      }

      // hide this control if volume support is missing
      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      checkVolumeSupport(_this, player);

      _this.throttledHandleMouseMove = throttle(bind(_this, _this.handleMouseMove), 25);

      _this.on('mousedown', _this.handleMouseDown);
      _this.on('touchstart', _this.handleMouseDown);

      // while the slider is active (the mouse has been pressed down and
      // is dragging) or in focus we do not want to hide the VolumeBar
      _this.on(_this.volumeBar, ['focus', 'slideractive'], function () {
        _this.volumeBar.addClass('vjs-slider-active');
        _this.addClass('vjs-slider-active');
        _this.trigger('slideractive');
      });

      _this.on(_this.volumeBar, ['blur', 'sliderinactive'], function () {
        _this.volumeBar.removeClass('vjs-slider-active');
        _this.removeClass('vjs-slider-active');
        _this.trigger('sliderinactive');
      });
      return _this;
    }

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    VolumeControl.prototype.createEl = function createEl() {
      var orientationClass = 'vjs-volume-horizontal';

      if (this.options_.vertical) {
        orientationClass = 'vjs-volume-vertical';
      }

      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-volume-control vjs-control ' + orientationClass
      });
    };

    /**
     * Handle `mousedown` or `touchstart` events on the `VolumeControl`.
     *
     * @param {EventTarget~Event} event
     *        `mousedown` or `touchstart` event that triggered this function
     *
     * @listens mousedown
     * @listens touchstart
     */


    VolumeControl.prototype.handleMouseDown = function handleMouseDown(event) {
      var doc = this.el_.ownerDocument;

      this.on(doc, 'mousemove', this.throttledHandleMouseMove);
      this.on(doc, 'touchmove', this.throttledHandleMouseMove);
      this.on(doc, 'mouseup', this.handleMouseUp);
      this.on(doc, 'touchend', this.handleMouseUp);
    };

    /**
     * Handle `mouseup` or `touchend` events on the `VolumeControl`.
     *
     * @param {EventTarget~Event} event
     *        `mouseup` or `touchend` event that triggered this function.
     *
     * @listens touchend
     * @listens mouseup
     */


    VolumeControl.prototype.handleMouseUp = function handleMouseUp(event) {
      var doc = this.el_.ownerDocument;

      this.off(doc, 'mousemove', this.throttledHandleMouseMove);
      this.off(doc, 'touchmove', this.throttledHandleMouseMove);
      this.off(doc, 'mouseup', this.handleMouseUp);
      this.off(doc, 'touchend', this.handleMouseUp);
    };

    /**
     * Handle `mousedown` or `touchstart` events on the `VolumeControl`.
     *
     * @param {EventTarget~Event} event
     *        `mousedown` or `touchstart` event that triggered this function
     *
     * @listens mousedown
     * @listens touchstart
     */


    VolumeControl.prototype.handleMouseMove = function handleMouseMove(event) {
      this.volumeBar.handleMouseMove(event);
    };

    return VolumeControl;
  }(Component);

  /**
   * Default options for the `VolumeControl`
   *
   * @type {Object}
   * @private
   */


  VolumeControl.prototype.options_ = {
    children: ['volumeBar']
  };

  Component.registerComponent('VolumeControl', VolumeControl);

  /**
   * @file mute-toggle.js
   */

  /**
   * A button component for muting the audio.
   *
   * @extends Button
   */

  var MuteToggle = function (_Button) {
    inherits(MuteToggle, _Button);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function MuteToggle(player, options) {
      classCallCheck(this, MuteToggle);

      // hide this control if volume support is missing
      var _this = possibleConstructorReturn(this, _Button.call(this, player, options));

      checkVolumeSupport(_this, player);

      _this.on(player, ['loadstart', 'volumechange'], _this.update);
      return _this;
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    MuteToggle.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-mute-control ' + _Button.prototype.buildCSSClass.call(this);
    };

    /**
     * This gets called when an `MuteToggle` is "clicked". See
     * {@link ClickableComponent} for more detailed information on what a click can be.
     *
     * @param {EventTarget~Event} [event]
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    MuteToggle.prototype.handleClick = function handleClick(event) {
      var vol = this.player_.volume();
      var lastVolume = this.player_.lastVolume_();

      if (vol === 0) {
        var volumeToSet = lastVolume < 0.1 ? 0.1 : lastVolume;

        this.player_.volume(volumeToSet);
        this.player_.muted(false);
      } else {
        this.player_.muted(this.player_.muted() ? false : true);
      }
    };

    /**
     * Update the `MuteToggle` button based on the state of `volume` and `muted`
     * on the player.
     *
     * @param {EventTarget~Event} [event]
     *        The {@link Player#loadstart} event if this function was called
     *        through an event.
     *
     * @listens Player#loadstart
     * @listens Player#volumechange
     */


    MuteToggle.prototype.update = function update(event) {
      this.updateIcon_();
      this.updateControlText_();
    };

    /**
     * Update the appearance of the `MuteToggle` icon.
     *
     * Possible states (given `level` variable below):
     * - 0: crossed out
     * - 1: zero bars of volume
     * - 2: one bar of volume
     * - 3: two bars of volume
     *
     * @private
     */


    MuteToggle.prototype.updateIcon_ = function updateIcon_() {
      var vol = this.player_.volume();
      var level = 3;

      if (vol === 0 || this.player_.muted()) {
        level = 0;
      } else if (vol < 0.33) {
        level = 1;
      } else if (vol < 0.67) {
        level = 2;
      }

      // TODO improve muted icon classes
      for (var i = 0; i < 4; i++) {
        removeClass(this.el_, 'vjs-vol-' + i);
      }
      addClass(this.el_, 'vjs-vol-' + level);
    };

    /**
     * If `muted` has changed on the player, update the control text
     * (`title` attribute on `vjs-mute-control` element and content of
     * `vjs-control-text` element).
     *
     * @private
     */


    MuteToggle.prototype.updateControlText_ = function updateControlText_() {
      var soundOff = this.player_.muted() || this.player_.volume() === 0;
      var text = soundOff ? 'Unmute' : 'Mute';

      if (this.controlText() !== text) {
        this.controlText(text);
      }
    };

    return MuteToggle;
  }(Button);

  /**
   * The text that should display over the `MuteToggle`s controls. Added for localization.
   *
   * @type {string}
   * @private
   */


  MuteToggle.prototype.controlText_ = 'Mute';

  Component.registerComponent('MuteToggle', MuteToggle);

  /**
   * @file volume-control.js
   */

  /**
   * A Component to contain the MuteToggle and VolumeControl so that
   * they can work together.
   *
   * @extends Component
   */

  var VolumePanel = function (_Component) {
    inherits(VolumePanel, _Component);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options={}]
     *        The key/value store of player options.
     */
    function VolumePanel(player) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      classCallCheck(this, VolumePanel);

      if (typeof options.inline !== 'undefined') {
        options.inline = options.inline;
      } else {
        options.inline = true;
      }

      // pass the inline option down to the VolumeControl as vertical if
      // the VolumeControl is on.
      if (typeof options.volumeControl === 'undefined' || isPlain(options.volumeControl)) {
        options.volumeControl = options.volumeControl || {};
        options.volumeControl.vertical = !options.inline;
      }

      // hide this control if volume support is missing
      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      checkVolumeSupport(_this, player);

      // while the slider is active (the mouse has been pressed down and
      // is dragging) we do not want to hide the VolumeBar
      _this.on(_this.volumeControl, ['slideractive'], _this.sliderActive_);

      _this.on(_this.volumeControl, ['sliderinactive'], _this.sliderInactive_);
      return _this;
    }

    /**
     * Add vjs-slider-active class to the VolumePanel
     *
     * @listens VolumeControl#slideractive
     * @private
     */


    VolumePanel.prototype.sliderActive_ = function sliderActive_() {
      this.addClass('vjs-slider-active');
    };

    /**
     * Removes vjs-slider-active class to the VolumePanel
     *
     * @listens VolumeControl#sliderinactive
     * @private
     */


    VolumePanel.prototype.sliderInactive_ = function sliderInactive_() {
      this.removeClass('vjs-slider-active');
    };

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    VolumePanel.prototype.createEl = function createEl() {
      var orientationClass = 'vjs-volume-panel-horizontal';

      if (!this.options_.inline) {
        orientationClass = 'vjs-volume-panel-vertical';
      }

      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-volume-panel vjs-control ' + orientationClass
      });
    };

    return VolumePanel;
  }(Component);

  /**
   * Default options for the `VolumeControl`
   *
   * @type {Object}
   * @private
   */


  VolumePanel.prototype.options_ = {
    children: ['muteToggle', 'volumeControl']
  };

  Component.registerComponent('VolumePanel', VolumePanel);

  /**
   * @file menu.js
   */

  /**
   * The Menu component is used to build popup menus, including subtitle and
   * captions selection menus.
   *
   * @extends Component
   */

  var Menu = function (_Component) {
    inherits(Menu, _Component);

    /**
     * Create an instance of this class.
     *
     * @param {Player} player
     *        the player that this component should attach to
     *
     * @param {Object} [options]
     *        Object of option names and values
     *
     */
    function Menu(player, options) {
      classCallCheck(this, Menu);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      if (options) {
        _this.menuButton_ = options.menuButton;
      }

      _this.focusedChild_ = -1;

      _this.on('keydown', _this.handleKeyPress);
      return _this;
    }

    /**
     * Add a {@link MenuItem} to the menu.
     *
     * @param {Object|string} component
     *        The name or instance of the `MenuItem` to add.
     *
     */


    Menu.prototype.addItem = function addItem(component) {
      this.addChild(component);
      component.on('click', bind(this, function (event) {
        // Unpress the associated MenuButton, and move focus back to it
        if (this.menuButton_) {
          this.menuButton_.unpressButton();

          // don't focus menu button if item is a caption settings item
          // because focus will move elsewhere
          if (component.name() !== 'CaptionSettingsMenuItem') {
            this.menuButton_.focus();
          }
        }
      }));
    };

    /**
     * Create the `Menu`s DOM element.
     *
     * @return {Element}
     *         the element that was created
     */


    Menu.prototype.createEl = function createEl$$1() {
      var contentElType = this.options_.contentElType || 'ul';

      this.contentEl_ = createEl(contentElType, {
        className: 'vjs-menu-content'
      });

      this.contentEl_.setAttribute('role', 'menu');

      var el = _Component.prototype.createEl.call(this, 'div', {
        append: this.contentEl_,
        className: 'vjs-menu'
      });

      el.appendChild(this.contentEl_);

      // Prevent clicks from bubbling up. Needed for Menu Buttons,
      // where a click on the parent is significant
      on(el, 'click', function (event) {
        event.preventDefault();
        event.stopImmediatePropagation();
      });

      return el;
    };

    Menu.prototype.dispose = function dispose() {
      this.contentEl_ = null;

      _Component.prototype.dispose.call(this);
    };

    /**
     * Handle a `keydown` event on this menu. This listener is added in the constructor.
     *
     * @param {EventTarget~Event} event
     *        A `keydown` event that happened on the menu.
     *
     * @listens keydown
     */


    Menu.prototype.handleKeyPress = function handleKeyPress(event) {
      // Left and Down Arrows
      if (event.which === 37 || event.which === 40) {
        event.preventDefault();
        this.stepForward();

        // Up and Right Arrows
      } else if (event.which === 38 || event.which === 39) {
        event.preventDefault();
        this.stepBack();
      }
    };

    /**
     * Move to next (lower) menu item for keyboard users.
     */


    Menu.prototype.stepForward = function stepForward() {
      var stepChild = 0;

      if (this.focusedChild_ !== undefined) {
        stepChild = this.focusedChild_ + 1;
      }
      this.focus(stepChild);
    };

    /**
     * Move to previous (higher) menu item for keyboard users.
     */


    Menu.prototype.stepBack = function stepBack() {
      var stepChild = 0;

      if (this.focusedChild_ !== undefined) {
        stepChild = this.focusedChild_ - 1;
      }
      this.focus(stepChild);
    };

    /**
     * Set focus on a {@link MenuItem} in the `Menu`.
     *
     * @param {Object|string} [item=0]
     *        Index of child item set focus on.
     */


    Menu.prototype.focus = function focus() {
      var item = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;

      var children = this.children().slice();
      var haveTitle = children.length && children[0].className && /vjs-menu-title/.test(children[0].className);

      if (haveTitle) {
        children.shift();
      }

      if (children.length > 0) {
        if (item < 0) {
          item = 0;
        } else if (item >= children.length) {
          item = children.length - 1;
        }

        this.focusedChild_ = item;

        children[item].el_.focus();
      }
    };

    return Menu;
  }(Component);

  Component.registerComponent('Menu', Menu);

  /**
   * @file menu-button.js
   */

  /**
   * A `MenuButton` class for any popup {@link Menu}.
   *
   * @extends Component
   */

  var MenuButton = function (_Component) {
    inherits(MenuButton, _Component);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options={}]
     *        The key/value store of player options.
     */
    function MenuButton(player) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      classCallCheck(this, MenuButton);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options));

      _this.menuButton_ = new Button(player, options);

      _this.menuButton_.controlText(_this.controlText_);
      _this.menuButton_.el_.setAttribute('aria-haspopup', 'true');

      // Add buildCSSClass values to the button, not the wrapper
      var buttonClass = Button.prototype.buildCSSClass();

      _this.menuButton_.el_.className = _this.buildCSSClass() + ' ' + buttonClass;
      _this.menuButton_.removeClass('vjs-control');

      _this.addChild(_this.menuButton_);

      _this.update();

      _this.enabled_ = true;

      _this.on(_this.menuButton_, 'tap', _this.handleClick);
      _this.on(_this.menuButton_, 'click', _this.handleClick);
      _this.on(_this.menuButton_, 'focus', _this.handleFocus);
      _this.on(_this.menuButton_, 'blur', _this.handleBlur);

      _this.on('keydown', _this.handleSubmenuKeyPress);
      return _this;
    }

    /**
     * Update the menu based on the current state of its items.
     */


    MenuButton.prototype.update = function update() {
      var menu = this.createMenu();

      if (this.menu) {
        this.menu.dispose();
        this.removeChild(this.menu);
      }

      this.menu = menu;
      this.addChild(menu);

      /**
       * Track the state of the menu button
       *
       * @type {Boolean}
       * @private
       */
      this.buttonPressed_ = false;
      this.menuButton_.el_.setAttribute('aria-expanded', 'false');

      if (this.items && this.items.length <= this.hideThreshold_) {
        this.hide();
      } else {
        this.show();
      }
    };

    /**
     * Create the menu and add all items to it.
     *
     * @return {Menu}
     *         The constructed menu
     */


    MenuButton.prototype.createMenu = function createMenu() {
      var menu = new Menu(this.player_, {menuButton: this});

      /**
       * Hide the menu if the number of items is less than or equal to this threshold. This defaults
       * to 0 and whenever we add items which can be hidden to the menu we'll increment it. We list
       * it here because every time we run `createMenu` we need to reset the value.
       *
       * @protected
       * @type {Number}
       */
      this.hideThreshold_ = 0;

      // Add a title list item to the top
      if (this.options_.title) {
        var title = createEl('li', {
          className: 'vjs-menu-title',
          innerHTML: toTitleCase(this.options_.title),
          tabIndex: -1
        });

        this.hideThreshold_ += 1;

        menu.children_.unshift(title);
        prependTo(title, menu.contentEl());
      }

      this.items = this.createItems();

      if (this.items) {
        // Add menu items to the menu
        for (var i = 0; i < this.items.length; i++) {
          menu.addItem(this.items[i]);
        }
      }

      return menu;
    };

    /**
     * Create the list of menu items. Specific to each subclass.
     *
     * @abstract
     */


    MenuButton.prototype.createItems = function createItems() {
    };

    /**
     * Create the `MenuButtons`s DOM element.
     *
     * @return {Element}
     *         The element that gets created.
     */


    MenuButton.prototype.createEl = function createEl$$1() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: this.buildWrapperCSSClass()
      }, {});
    };

    /**
     * Allow sub components to stack CSS class names for the wrapper element
     *
     * @return {string}
     *         The constructed wrapper DOM `className`
     */


    MenuButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {
      var menuButtonClass = 'vjs-menu-button';

      // If the inline option is passed, we want to use different styles altogether.
      if (this.options_.inline === true) {
        menuButtonClass += '-inline';
      } else {
        menuButtonClass += '-popup';
      }

      // TODO: Fix the CSS so that this isn't necessary
      var buttonClass = Button.prototype.buildCSSClass();

      return 'vjs-menu-button ' + menuButtonClass + ' ' + buttonClass + ' ' + _Component.prototype.buildCSSClass.call(this);
    };

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    MenuButton.prototype.buildCSSClass = function buildCSSClass() {
      var menuButtonClass = 'vjs-menu-button';

      // If the inline option is passed, we want to use different styles altogether.
      if (this.options_.inline === true) {
        menuButtonClass += '-inline';
      } else {
        menuButtonClass += '-popup';
      }

      return 'vjs-menu-button ' + menuButtonClass + ' ' + _Component.prototype.buildCSSClass.call(this);
    };

    /**
     * Get or set the localized control text that will be used for accessibility.
     *
     * > NOTE: This will come from the internal `menuButton_` element.
     *
     * @param {string} [text]
     *        Control text for element.
     *
     * @param {Element} [el=this.menuButton_.el()]
     *        Element to set the title on.
     *
     * @return {string}
     *         - The control text when getting
     */


    MenuButton.prototype.controlText = function controlText(text) {
      var el = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.menuButton_.el();

      return this.menuButton_.controlText(text, el);
    };

    /**
     * Handle a click on a `MenuButton`.
     * See {@link ClickableComponent#handleClick} for instances where this is called.
     *
     * @param {EventTarget~Event} event
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    MenuButton.prototype.handleClick = function handleClick(event) {
      // When you click the button it adds focus, which will show the menu.
      // So we'll remove focus when the mouse leaves the button. Focus is needed
      // for tab navigation.

      this.one(this.menu.contentEl(), 'mouseleave', bind(this, function (e) {
        this.unpressButton();
        this.el_.blur();
      }));
      if (this.buttonPressed_) {
        this.unpressButton();
      } else {
        this.pressButton();
      }
    };

    /**
     * Set the focus to the actual button, not to this element
     */


    MenuButton.prototype.focus = function focus() {
      this.menuButton_.focus();
    };

    /**
     * Remove the focus from the actual button, not this element
     */


    MenuButton.prototype.blur = function blur() {
      this.menuButton_.blur();
    };

    /**
     * This gets called when a `MenuButton` gains focus via a `focus` event.
     * Turns on listening for `keydown` events. When they happen it
     * calls `this.handleKeyPress`.
     *
     * @param {EventTarget~Event} event
     *        The `focus` event that caused this function to be called.
     *
     * @listens focus
     */


    MenuButton.prototype.handleFocus = function handleFocus() {
      on(document_1, 'keydown', bind(this, this.handleKeyPress));
    };

    /**
     * Called when a `MenuButton` loses focus. Turns off the listener for
     * `keydown` events. Which Stops `this.handleKeyPress` from getting called.
     *
     * @param {EventTarget~Event} event
     *        The `blur` event that caused this function to be called.
     *
     * @listens blur
     */


    MenuButton.prototype.handleBlur = function handleBlur() {
      off(document_1, 'keydown', bind(this, this.handleKeyPress));
    };

    /**
     * Handle tab, escape, down arrow, and up arrow keys for `MenuButton`. See
     * {@link ClickableComponent#handleKeyPress} for instances where this is called.
     *
     * @param {EventTarget~Event} event
     *        The `keydown` event that caused this function to be called.
     *
     * @listens keydown
     */


    MenuButton.prototype.handleKeyPress = function handleKeyPress(event) {

      // Escape (27) key or Tab (9) key unpress the 'button'
      if (event.which === 27 || event.which === 9) {
        if (this.buttonPressed_) {
          this.unpressButton();
        }
        // Don't preventDefault for Tab key - we still want to lose focus
        if (event.which !== 9) {
          event.preventDefault();
          // Set focus back to the menu button's button
          this.menuButton_.el_.focus();
        }
        // Up (38) key or Down (40) key press the 'button'
      } else if (event.which === 38 || event.which === 40) {
        if (!this.buttonPressed_) {
          this.pressButton();
          event.preventDefault();
        }
      }
    };

    /**
     * Handle a `keydown` event on a sub-menu. The listener for this is added in
     * the constructor.
     *
     * @param {EventTarget~Event} event
     *        Key press event
     *
     * @listens keydown
     */


    MenuButton.prototype.handleSubmenuKeyPress = function handleSubmenuKeyPress(event) {

      // Escape (27) key or Tab (9) key unpress the 'button'
      if (event.which === 27 || event.which === 9) {
        if (this.buttonPressed_) {
          this.unpressButton();
        }
        // Don't preventDefault for Tab key - we still want to lose focus
        if (event.which !== 9) {
          event.preventDefault();
          // Set focus back to the menu button's button
          this.menuButton_.el_.focus();
        }
      }
    };

    /**
     * Put the current `MenuButton` into a pressed state.
     */


    MenuButton.prototype.pressButton = function pressButton() {
      if (this.enabled_) {
        this.buttonPressed_ = true;
        this.menu.lockShowing();
        this.menuButton_.el_.setAttribute('aria-expanded', 'true');

        // set the focus into the submenu, except on iOS where it is resulting in
        // undesired scrolling behavior when the player is in an iframe
        if (IS_IOS && isInFrame()) {
          // Return early so that the menu isn't focused
          return;
        }

        this.menu.focus();
      }
    };

    /**
     * Take the current `MenuButton` out of a pressed state.
     */


    MenuButton.prototype.unpressButton = function unpressButton() {
      if (this.enabled_) {
        this.buttonPressed_ = false;
        this.menu.unlockShowing();
        this.menuButton_.el_.setAttribute('aria-expanded', 'false');
      }
    };

    /**
     * Disable the `MenuButton`. Don't allow it to be clicked.
     */


    MenuButton.prototype.disable = function disable() {
      this.unpressButton();

      this.enabled_ = false;
      this.addClass('vjs-disabled');

      this.menuButton_.disable();
    };

    /**
     * Enable the `MenuButton`. Allow it to be clicked.
     */


    MenuButton.prototype.enable = function enable() {
      this.enabled_ = true;
      this.removeClass('vjs-disabled');

      this.menuButton_.enable();
    };

    return MenuButton;
  }(Component);

  Component.registerComponent('MenuButton', MenuButton);

  /**
   * @file track-button.js
   */

  /**
   * The base class for buttons that toggle specific  track types (e.g. subtitles).
   *
   * @extends MenuButton
   */

  var TrackButton = function (_MenuButton) {
    inherits(TrackButton, _MenuButton);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function TrackButton(player, options) {
      classCallCheck(this, TrackButton);

      var tracks = options.tracks;

      var _this = possibleConstructorReturn(this, _MenuButton.call(this, player, options));

      if (_this.items.length <= 1) {
        _this.hide();
      }

      if (!tracks) {
        return possibleConstructorReturn(_this);
      }

      var updateHandler = bind(_this, _this.update);

      tracks.addEventListener('removetrack', updateHandler);
      tracks.addEventListener('addtrack', updateHandler);
      _this.player_.on('ready', updateHandler);

      _this.player_.on('dispose', function () {
        tracks.removeEventListener('removetrack', updateHandler);
        tracks.removeEventListener('addtrack', updateHandler);
      });
      return _this;
    }

    return TrackButton;
  }(MenuButton);

  Component.registerComponent('TrackButton', TrackButton);

  /**
   * @file menu-item.js
   */

  /**
   * The component for a menu item. `<li>`
   *
   * @extends ClickableComponent
   */

  var MenuItem = function (_ClickableComponent) {
    inherits(MenuItem, _ClickableComponent);

    /**
     * Creates an instance of the this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options={}]
     *        The key/value store of player options.
     *
     */
    function MenuItem(player, options) {
      classCallCheck(this, MenuItem);

      var _this = possibleConstructorReturn(this, _ClickableComponent.call(this, player, options));

      _this.selectable = options.selectable;
      _this.isSelected_ = options.selected || false;

      _this.selected(_this.isSelected_);

      if (_this.selectable) {
        // TODO: May need to be either menuitemcheckbox or menuitemradio,
        //       and may need logical grouping of menu items.
        _this.el_.setAttribute('role', 'menuitemcheckbox');
      } else {
        _this.el_.setAttribute('role', 'menuitem');
      }
      return _this;
    }

    /**
     * Create the `MenuItem's DOM element
     *
     * @param {string} [type=li]
     *        Element's node type, not actually used, always set to `li`.
     *
     * @param {Object} [props={}]
     *        An object of properties that should be set on the element
     *
     * @param {Object} [attrs={}]
     *        An object of attributes that should be set on the element
     *
     * @return {Element}
     *         The element that gets created.
     */


    MenuItem.prototype.createEl = function createEl(type, props, attrs) {
      // The control is textual, not just an icon
      this.nonIconControl = true;

      return _ClickableComponent.prototype.createEl.call(this, 'li', assign({
        className: 'vjs-menu-item',
        innerHTML: '<span class="vjs-menu-item-text">' + this.localize(this.options_.label) + '</span>',
        tabIndex: -1
      }, props), attrs);
    };

    /**
     * Any click on a `MenuItem` puts int into the selected state.
     * See {@link ClickableComponent#handleClick} for instances where this is called.
     *
     * @param {EventTarget~Event} event
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    MenuItem.prototype.handleClick = function handleClick(event) {
      this.selected(true);
    };

    /**
     * Set the state for this menu item as selected or not.
     *
     * @param {boolean} selected
     *        if the menu item is selected or not
     */


    MenuItem.prototype.selected = function selected(_selected) {
      if (this.selectable) {
        if (_selected) {
          this.addClass('vjs-selected');
          this.el_.setAttribute('aria-checked', 'true');
          // aria-checked isn't fully supported by browsers/screen readers,
          // so indicate selected state to screen reader in the control text.
          this.controlText(', selected');
          this.isSelected_ = true;
        } else {
          this.removeClass('vjs-selected');
          this.el_.setAttribute('aria-checked', 'false');
          // Indicate un-selected state to screen reader
          this.controlText('');
          this.isSelected_ = false;
        }
      }
    };

    return MenuItem;
  }(ClickableComponent);

  Component.registerComponent('MenuItem', MenuItem);

  /**
   * @file text-track-menu-item.js
   */

  /**
   * The specific menu item type for selecting a language within a text track kind
   *
   * @extends MenuItem
   */

  var TextTrackMenuItem = function (_MenuItem) {
    inherits(TextTrackMenuItem, _MenuItem);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function TextTrackMenuItem(player, options) {
      classCallCheck(this, TextTrackMenuItem);

      var track = options.track;
      var tracks = player.textTracks();

      // Modify options for parent MenuItem class's init.
      options.label = track.label || track.language || 'Unknown';
      options.selected = track.mode === 'showing';

      var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));

      _this.track = track;
      var changeHandler = function changeHandler() {
        for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }

        _this.handleTracksChange.apply(_this, args);
      };
      var selectedLanguageChangeHandler = function selectedLanguageChangeHandler() {
        for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
          args[_key2] = arguments[_key2];
        }

        _this.handleSelectedLanguageChange.apply(_this, args);
      };

      player.on(['loadstart', 'texttrackchange'], changeHandler);
      tracks.addEventListener('change', changeHandler);
      tracks.addEventListener('selectedlanguagechange', selectedLanguageChangeHandler);
      _this.on('dispose', function () {
        player.off(['loadstart', 'texttrackchange'], changeHandler);
        tracks.removeEventListener('change', changeHandler);
        tracks.removeEventListener('selectedlanguagechange', selectedLanguageChangeHandler);
      });

      // iOS7 doesn't dispatch change events to TextTrackLists when an
      // associated track's mode changes. Without something like
      // Object.observe() (also not present on iOS7), it's not
      // possible to detect changes to the mode attribute and polyfill
      // the change event. As a poor substitute, we manually dispatch
      // change events whenever the controls modify the mode.
      if (tracks.onchange === undefined) {
        var event = void 0;

        _this.on(['tap', 'click'], function () {
          if (_typeof(window_1.Event) !== 'object') {
            // Android 2.3 throws an Illegal Constructor error for window.Event
            try {
              event = new window_1.Event('change');
            } catch (err) {
              // continue regardless of error
            }
          }

          if (!event) {
            event = document_1.createEvent('Event');
            event.initEvent('change', true, true);
          }

          tracks.dispatchEvent(event);
        });
      }

      // set the default state based on current tracks
      _this.handleTracksChange();
      return _this;
    }

    /**
     * This gets called when an `TextTrackMenuItem` is "clicked". See
     * {@link ClickableComponent} for more detailed information on what a click can be.
     *
     * @param {EventTarget~Event} event
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    TextTrackMenuItem.prototype.handleClick = function handleClick(event) {
      var kind = this.track.kind;
      var kinds = this.track.kinds;
      var tracks = this.player_.textTracks();

      if (!kinds) {
        kinds = [kind];
      }

      _MenuItem.prototype.handleClick.call(this, event);

      if (!tracks) {
        return;
      }

      for (var i = 0; i < tracks.length; i++) {
        var track = tracks[i];

        if (track === this.track && kinds.indexOf(track.kind) > -1) {
          if (track.mode !== 'showing') {
            track.mode = 'showing';
          }
        } else if (track.mode !== 'disabled') {
          track.mode = 'disabled';
        }
      }
    };

    /**
     * Handle text track list change
     *
     * @param {EventTarget~Event} event
     *        The `change` event that caused this function to be called.
     *
     * @listens TextTrackList#change
     */


    TextTrackMenuItem.prototype.handleTracksChange = function handleTracksChange(event) {
      var shouldBeSelected = this.track.mode === 'showing';

      // Prevent redundant selected() calls because they may cause
      // screen readers to read the appended control text unnecessarily
      if (shouldBeSelected !== this.isSelected_) {
        this.selected(shouldBeSelected);
      }
    };

    TextTrackMenuItem.prototype.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {
      if (this.track.mode === 'showing') {
        var selectedLanguage = this.player_.cache_.selectedLanguage;

        // Don't replace the kind of track across the same language
        if (selectedLanguage && selectedLanguage.enabled && selectedLanguage.language === this.track.language && selectedLanguage.kind !== this.track.kind) {
          return;
        }

        this.player_.cache_.selectedLanguage = {
          enabled: true,
          language: this.track.language,
          kind: this.track.kind
        };
      }
    };

    TextTrackMenuItem.prototype.dispose = function dispose() {
      // remove reference to track object on dispose
      this.track = null;

      _MenuItem.prototype.dispose.call(this);
    };

    return TextTrackMenuItem;
  }(MenuItem);

  Component.registerComponent('TextTrackMenuItem', TextTrackMenuItem);

  /**
   * @file off-text-track-menu-item.js
   */

  /**
   * A special menu item for turning of a specific type of text track
   *
   * @extends TextTrackMenuItem
   */

  var OffTextTrackMenuItem = function (_TextTrackMenuItem) {
    inherits(OffTextTrackMenuItem, _TextTrackMenuItem);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function OffTextTrackMenuItem(player, options) {
      classCallCheck(this, OffTextTrackMenuItem);

      // Create pseudo track info
      // Requires options['kind']
      options.track = {
        player: player,
        kind: options.kind,
        kinds: options.kinds,
        default: false,
        mode: 'disabled'
      };

      if (!options.kinds) {
        options.kinds = [options.kind];
      }

      if (options.label) {
        options.track.label = options.label;
      } else {
        options.track.label = options.kinds.join(' and ') + ' off';
      }

      // MenuItem is selectable
      options.selectable = true;

      return possibleConstructorReturn(this, _TextTrackMenuItem.call(this, player, options));
    }

    /**
     * Handle text track change
     *
     * @param {EventTarget~Event} event
     *        The event that caused this function to run
     */


    OffTextTrackMenuItem.prototype.handleTracksChange = function handleTracksChange(event) {
      var tracks = this.player().textTracks();
      var shouldBeSelected = true;

      for (var i = 0, l = tracks.length; i < l; i++) {
        var track = tracks[i];

        if (this.options_.kinds.indexOf(track.kind) > -1 && track.mode === 'showing') {
          shouldBeSelected = false;
          break;
        }
      }

      // Prevent redundant selected() calls because they may cause
      // screen readers to read the appended control text unnecessarily
      if (shouldBeSelected !== this.isSelected_) {
        this.selected(shouldBeSelected);
      }
    };

    OffTextTrackMenuItem.prototype.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {
      var tracks = this.player().textTracks();
      var allHidden = true;

      for (var i = 0, l = tracks.length; i < l; i++) {
        var track = tracks[i];

        if (['captions', 'descriptions', 'subtitles'].indexOf(track.kind) > -1 && track.mode === 'showing') {
          allHidden = false;
          break;
        }
      }

      if (allHidden) {
        this.player_.cache_.selectedLanguage = {
          enabled: false
        };
      }
    };

    return OffTextTrackMenuItem;
  }(TextTrackMenuItem);

  Component.registerComponent('OffTextTrackMenuItem', OffTextTrackMenuItem);

  /**
   * @file text-track-button.js
   */

  /**
   * The base class for buttons that toggle specific text track types (e.g. subtitles)
   *
   * @extends MenuButton
   */

  var TextTrackButton = function (_TrackButton) {
    inherits(TextTrackButton, _TrackButton);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options={}]
     *        The key/value store of player options.
     */
    function TextTrackButton(player) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      classCallCheck(this, TextTrackButton);

      options.tracks = player.textTracks();

      return possibleConstructorReturn(this, _TrackButton.call(this, player, options));
    }

    /**
     * Create a menu item for each text track
     *
     * @param {TextTrackMenuItem[]} [items=[]]
     *        Existing array of items to use during creation
     *
     * @return {TextTrackMenuItem[]}
     *         Array of menu items that were created
     */


    TextTrackButton.prototype.createItems = function createItems() {
      var items = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      var TrackMenuItem = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : TextTrackMenuItem;


      // Label is an override for the [track] off label
      // USed to localise captions/subtitles
      var label = void 0;

      if (this.label_) {
        label = this.label_ + ' off';
      }
      // Add an OFF menu item to turn all tracks off
      items.push(new OffTextTrackMenuItem(this.player_, {
        kinds: this.kinds_,
        kind: this.kind_,
        label: label
      }));

      this.hideThreshold_ += 1;

      var tracks = this.player_.textTracks();

      if (!Array.isArray(this.kinds_)) {
        this.kinds_ = [this.kind_];
      }

      for (var i = 0; i < tracks.length; i++) {
        var track = tracks[i];

        // only add tracks that are of an appropriate kind and have a label
        if (this.kinds_.indexOf(track.kind) > -1) {

          var item = new TrackMenuItem(this.player_, {
            track: track,
            // MenuItem is selectable
            selectable: true
          });

          item.addClass('vjs-' + track.kind + '-menu-item');
          items.push(item);
        }
      }

      return items;
    };

    return TextTrackButton;
  }(TrackButton);

  Component.registerComponent('TextTrackButton', TextTrackButton);

  /**
   * @file chapters-track-menu-item.js
   */

  /**
   * The chapter track menu item
   *
   * @extends MenuItem
   */

  var ChaptersTrackMenuItem = function (_MenuItem) {
    inherits(ChaptersTrackMenuItem, _MenuItem);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function ChaptersTrackMenuItem(player, options) {
      classCallCheck(this, ChaptersTrackMenuItem);

      var track = options.track;
      var cue = options.cue;
      var currentTime = player.currentTime();

      // Modify options for parent MenuItem class's init.
      options.selectable = true;
      options.label = cue.text;
      options.selected = cue.startTime <= currentTime && currentTime < cue.endTime;

      var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));

      _this.track = track;
      _this.cue = cue;
      track.addEventListener('cuechange', bind(_this, _this.update));
      return _this;
    }

    /**
     * This gets called when an `ChaptersTrackMenuItem` is "clicked". See
     * {@link ClickableComponent} for more detailed information on what a click can be.
     *
     * @param {EventTarget~Event} [event]
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    ChaptersTrackMenuItem.prototype.handleClick = function handleClick(event) {
      _MenuItem.prototype.handleClick.call(this);
      this.player_.currentTime(this.cue.startTime);
      this.update(this.cue.startTime);
    };

    /**
     * Update chapter menu item
     *
     * @param {EventTarget~Event} [event]
     *        The `cuechange` event that caused this function to run.
     *
     * @listens TextTrack#cuechange
     */


    ChaptersTrackMenuItem.prototype.update = function update(event) {
      var cue = this.cue;
      var currentTime = this.player_.currentTime();

      // vjs.log(currentTime, cue.startTime);
      this.selected(cue.startTime <= currentTime && currentTime < cue.endTime);
    };

    return ChaptersTrackMenuItem;
  }(MenuItem);

  Component.registerComponent('ChaptersTrackMenuItem', ChaptersTrackMenuItem);

  /**
   * @file chapters-button.js
   */

  /**
   * The button component for toggling and selecting chapters
   * Chapters act much differently than other text tracks
   * Cues are navigation vs. other tracks of alternative languages
   *
   * @extends TextTrackButton
   */

  var ChaptersButton = function (_TextTrackButton) {
    inherits(ChaptersButton, _TextTrackButton);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     *
     * @param {Component~ReadyCallback} [ready]
     *        The function to call when this function is ready.
     */
    function ChaptersButton(player, options, ready) {
      classCallCheck(this, ChaptersButton);
      return possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    ChaptersButton.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-chapters-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);
    };

    ChaptersButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {
      return 'vjs-chapters-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);
    };

    /**
     * Update the menu based on the current state of its items.
     *
     * @param {EventTarget~Event} [event]
     *        An event that triggered this function to run.
     *
     * @listens TextTrackList#addtrack
     * @listens TextTrackList#removetrack
     * @listens TextTrackList#change
     */


    ChaptersButton.prototype.update = function update(event) {
      if (!this.track_ || event && (event.type === 'addtrack' || event.type === 'removetrack')) {
        this.setTrack(this.findChaptersTrack());
      }
      _TextTrackButton.prototype.update.call(this);
    };

    /**
     * Set the currently selected track for the chapters button.
     *
     * @param {TextTrack} track
     *        The new track to select. Nothing will change if this is the currently selected
     *        track.
     */


    ChaptersButton.prototype.setTrack = function setTrack(track) {
      if (this.track_ === track) {
        return;
      }

      if (!this.updateHandler_) {
        this.updateHandler_ = this.update.bind(this);
      }

      // here this.track_ refers to the old track instance
      if (this.track_) {
        var remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);

        if (remoteTextTrackEl) {
          remoteTextTrackEl.removeEventListener('load', this.updateHandler_);
        }

        this.track_ = null;
      }

      this.track_ = track;

      // here this.track_ refers to the new track instance
      if (this.track_) {
        this.track_.mode = 'hidden';

        var _remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);

        if (_remoteTextTrackEl) {
          _remoteTextTrackEl.addEventListener('load', this.updateHandler_);
        }
      }
    };

    /**
     * Find the track object that is currently in use by this ChaptersButton
     *
     * @return {TextTrack|undefined}
     *         The current track or undefined if none was found.
     */


    ChaptersButton.prototype.findChaptersTrack = function findChaptersTrack() {
      var tracks = this.player_.textTracks() || [];

      for (var i = tracks.length - 1; i >= 0; i--) {
        // We will always choose the last track as our chaptersTrack
        var track = tracks[i];

        if (track.kind === this.kind_) {
          return track;
        }
      }
    };

    /**
     * Get the caption for the ChaptersButton based on the track label. This will also
     * use the current tracks localized kind as a fallback if a label does not exist.
     *
     * @return {string}
     *         The tracks current label or the localized track kind.
     */


    ChaptersButton.prototype.getMenuCaption = function getMenuCaption() {
      if (this.track_ && this.track_.label) {
        return this.track_.label;
      }
      return this.localize(toTitleCase(this.kind_));
    };

    /**
     * Create menu from chapter track
     *
     * @return {Menu}
     *         New menu for the chapter buttons
     */


    ChaptersButton.prototype.createMenu = function createMenu() {
      this.options_.title = this.getMenuCaption();
      return _TextTrackButton.prototype.createMenu.call(this);
    };

    /**
     * Create a menu item for each text track
     *
     * @return {TextTrackMenuItem[]}
     *         Array of menu items
     */


    ChaptersButton.prototype.createItems = function createItems() {
      var items = [];

      if (!this.track_) {
        return items;
      }

      var cues = this.track_.cues;

      if (!cues) {
        return items;
      }

      for (var i = 0, l = cues.length; i < l; i++) {
        var cue = cues[i];
        var mi = new ChaptersTrackMenuItem(this.player_, {track: this.track_, cue: cue});

        items.push(mi);
      }

      return items;
    };

    return ChaptersButton;
  }(TextTrackButton);

  /**
   * `kind` of TextTrack to look for to associate it with this menu.
   *
   * @type {string}
   * @private
   */


  ChaptersButton.prototype.kind_ = 'chapters';

  /**
   * The text that should display over the `ChaptersButton`s controls. Added for localization.
   *
   * @type {string}
   * @private
   */
  ChaptersButton.prototype.controlText_ = 'Chapters';

  Component.registerComponent('ChaptersButton', ChaptersButton);

  /**
   * @file descriptions-button.js
   */

  /**
   * The button component for toggling and selecting descriptions
   *
   * @extends TextTrackButton
   */

  var DescriptionsButton = function (_TextTrackButton) {
    inherits(DescriptionsButton, _TextTrackButton);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     *
     * @param {Component~ReadyCallback} [ready]
     *        The function to call when this component is ready.
     */
    function DescriptionsButton(player, options, ready) {
      classCallCheck(this, DescriptionsButton);

      var _this = possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));

      var tracks = player.textTracks();
      var changeHandler = bind(_this, _this.handleTracksChange);

      tracks.addEventListener('change', changeHandler);
      _this.on('dispose', function () {
        tracks.removeEventListener('change', changeHandler);
      });
      return _this;
    }

    /**
     * Handle text track change
     *
     * @param {EventTarget~Event} event
     *        The event that caused this function to run
     *
     * @listens TextTrackList#change
     */


    DescriptionsButton.prototype.handleTracksChange = function handleTracksChange(event) {
      var tracks = this.player().textTracks();
      var disabled = false;

      // Check whether a track of a different kind is showing
      for (var i = 0, l = tracks.length; i < l; i++) {
        var track = tracks[i];

        if (track.kind !== this.kind_ && track.mode === 'showing') {
          disabled = true;
          break;
        }
      }

      // If another track is showing, disable this menu button
      if (disabled) {
        this.disable();
      } else {
        this.enable();
      }
    };

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    DescriptionsButton.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-descriptions-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);
    };

    DescriptionsButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {
      return 'vjs-descriptions-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);
    };

    return DescriptionsButton;
  }(TextTrackButton);

  /**
   * `kind` of TextTrack to look for to associate it with this menu.
   *
   * @type {string}
   * @private
   */


  DescriptionsButton.prototype.kind_ = 'descriptions';

  /**
   * The text that should display over the `DescriptionsButton`s controls. Added for localization.
   *
   * @type {string}
   * @private
   */
  DescriptionsButton.prototype.controlText_ = 'Descriptions';

  Component.registerComponent('DescriptionsButton', DescriptionsButton);

  /**
   * @file subtitles-button.js
   */

  /**
   * The button component for toggling and selecting subtitles
   *
   * @extends TextTrackButton
   */

  var SubtitlesButton = function (_TextTrackButton) {
    inherits(SubtitlesButton, _TextTrackButton);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     *
     * @param {Component~ReadyCallback} [ready]
     *        The function to call when this component is ready.
     */
    function SubtitlesButton(player, options, ready) {
      classCallCheck(this, SubtitlesButton);
      return possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    SubtitlesButton.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-subtitles-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);
    };

    SubtitlesButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {
      return 'vjs-subtitles-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);
    };

    return SubtitlesButton;
  }(TextTrackButton);

  /**
   * `kind` of TextTrack to look for to associate it with this menu.
   *
   * @type {string}
   * @private
   */


  SubtitlesButton.prototype.kind_ = 'subtitles';

  /**
   * The text that should display over the `SubtitlesButton`s controls. Added for localization.
   *
   * @type {string}
   * @private
   */
  SubtitlesButton.prototype.controlText_ = 'Subtitles';

  Component.registerComponent('SubtitlesButton', SubtitlesButton);

  /**
   * @file caption-settings-menu-item.js
   */

  /**
   * The menu item for caption track settings menu
   *
   * @extends TextTrackMenuItem
   */

  var CaptionSettingsMenuItem = function (_TextTrackMenuItem) {
    inherits(CaptionSettingsMenuItem, _TextTrackMenuItem);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function CaptionSettingsMenuItem(player, options) {
      classCallCheck(this, CaptionSettingsMenuItem);

      options.track = {
        player: player,
        kind: options.kind,
        label: options.kind + ' settings',
        selectable: false,
        default: false,
        mode: 'disabled'
      };

      // CaptionSettingsMenuItem has no concept of 'selected'
      options.selectable = false;

      options.name = 'CaptionSettingsMenuItem';

      var _this = possibleConstructorReturn(this, _TextTrackMenuItem.call(this, player, options));

      _this.addClass('vjs-texttrack-settings');
      _this.controlText(', opens ' + options.kind + ' settings dialog');
      return _this;
    }

    /**
     * This gets called when an `CaptionSettingsMenuItem` is "clicked". See
     * {@link ClickableComponent} for more detailed information on what a click can be.
     *
     * @param {EventTarget~Event} [event]
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    CaptionSettingsMenuItem.prototype.handleClick = function handleClick(event) {
      this.player().getChild('textTrackSettings').open();
    };

    return CaptionSettingsMenuItem;
  }(TextTrackMenuItem);

  Component.registerComponent('CaptionSettingsMenuItem', CaptionSettingsMenuItem);

  /**
   * @file captions-button.js
   */

  /**
   * The button component for toggling and selecting captions
   *
   * @extends TextTrackButton
   */

  var CaptionsButton = function (_TextTrackButton) {
    inherits(CaptionsButton, _TextTrackButton);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     *
     * @param {Component~ReadyCallback} [ready]
     *        The function to call when this component is ready.
     */
    function CaptionsButton(player, options, ready) {
      classCallCheck(this, CaptionsButton);
      return possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    CaptionsButton.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-captions-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);
    };

    CaptionsButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {
      return 'vjs-captions-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);
    };

    /**
     * Create caption menu items
     *
     * @return {CaptionSettingsMenuItem[]}
     *         The array of current menu items.
     */


    CaptionsButton.prototype.createItems = function createItems() {
      var items = [];

      if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {
        items.push(new CaptionSettingsMenuItem(this.player_, {kind: this.kind_}));

        this.hideThreshold_ += 1;
      }

      return _TextTrackButton.prototype.createItems.call(this, items);
    };

    return CaptionsButton;
  }(TextTrackButton);

  /**
   * `kind` of TextTrack to look for to associate it with this menu.
   *
   * @type {string}
   * @private
   */


  CaptionsButton.prototype.kind_ = 'captions';

  /**
   * The text that should display over the `CaptionsButton`s controls. Added for localization.
   *
   * @type {string}
   * @private
   */
  CaptionsButton.prototype.controlText_ = 'Captions';

  Component.registerComponent('CaptionsButton', CaptionsButton);

  /**
   * @file subs-caps-menu-item.js
   */

  /**
   * SubsCapsMenuItem has an [cc] icon to distinguish captions from subtitles
   * in the SubsCapsMenu.
   *
   * @extends TextTrackMenuItem
   */

  var SubsCapsMenuItem = function (_TextTrackMenuItem) {
    inherits(SubsCapsMenuItem, _TextTrackMenuItem);

    function SubsCapsMenuItem() {
      classCallCheck(this, SubsCapsMenuItem);
      return possibleConstructorReturn(this, _TextTrackMenuItem.apply(this, arguments));
    }

    SubsCapsMenuItem.prototype.createEl = function createEl(type, props, attrs) {
      var innerHTML = '<span class="vjs-menu-item-text">' + this.localize(this.options_.label);

      if (this.options_.track.kind === 'captions') {
        innerHTML += '\n        <span aria-hidden="true" class="vjs-icon-placeholder"></span>\n        <span class="vjs-control-text"> ' + this.localize('Captions') + '</span>\n      ';
      }

      innerHTML += '</span>';

      var el = _TextTrackMenuItem.prototype.createEl.call(this, type, assign({
        innerHTML: innerHTML
      }, props), attrs);

      return el;
    };

    return SubsCapsMenuItem;
  }(TextTrackMenuItem);

  Component.registerComponent('SubsCapsMenuItem', SubsCapsMenuItem);

  /**
   * @file sub-caps-button.js
   */
  /**
   * The button component for toggling and selecting captions and/or subtitles
   *
   * @extends TextTrackButton
   */

  var SubsCapsButton = function (_TextTrackButton) {
    inherits(SubsCapsButton, _TextTrackButton);

    function SubsCapsButton(player) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      classCallCheck(this, SubsCapsButton);

      // Although North America uses "captions" in most cases for
      // "captions and subtitles" other locales use "subtitles"
      var _this = possibleConstructorReturn(this, _TextTrackButton.call(this, player, options));

      _this.label_ = 'subtitles';
      if (['en', 'en-us', 'en-ca', 'fr-ca'].indexOf(_this.player_.language_) > -1) {
        _this.label_ = 'captions';
      }
      _this.menuButton_.controlText(toTitleCase(_this.label_));
      return _this;
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    SubsCapsButton.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-subs-caps-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);
    };

    SubsCapsButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {
      return 'vjs-subs-caps-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);
    };

    /**
     * Create caption/subtitles menu items
     *
     * @return {CaptionSettingsMenuItem[]}
     *         The array of current menu items.
     */


    SubsCapsButton.prototype.createItems = function createItems() {
      var items = [];

      if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {
        items.push(new CaptionSettingsMenuItem(this.player_, {kind: this.label_}));

        this.hideThreshold_ += 1;
      }

      items = _TextTrackButton.prototype.createItems.call(this, items, SubsCapsMenuItem);
      return items;
    };

    return SubsCapsButton;
  }(TextTrackButton);

  /**
   * `kind`s of TextTrack to look for to associate it with this menu.
   *
   * @type {array}
   * @private
   */


  SubsCapsButton.prototype.kinds_ = ['captions', 'subtitles'];

  /**
   * The text that should display over the `SubsCapsButton`s controls.
   *
   *
   * @type {string}
   * @private
   */
  SubsCapsButton.prototype.controlText_ = 'Subtitles';

  Component.registerComponent('SubsCapsButton', SubsCapsButton);

  /**
   * @file audio-track-menu-item.js
   */

  /**
   * An {@link AudioTrack} {@link MenuItem}
   *
   * @extends MenuItem
   */

  var AudioTrackMenuItem = function (_MenuItem) {
    inherits(AudioTrackMenuItem, _MenuItem);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function AudioTrackMenuItem(player, options) {
      classCallCheck(this, AudioTrackMenuItem);

      var track = options.track;
      var tracks = player.audioTracks();

      // Modify options for parent MenuItem class's init.
      options.label = track.label || track.language || 'Unknown';
      options.selected = track.enabled;

      var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));

      _this.track = track;

      var changeHandler = function changeHandler() {
        for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }

        _this.handleTracksChange.apply(_this, args);
      };

      tracks.addEventListener('change', changeHandler);
      _this.on('dispose', function () {
        tracks.removeEventListener('change', changeHandler);
      });
      return _this;
    }

    /**
     * This gets called when an `AudioTrackMenuItem is "clicked". See {@link ClickableComponent}
     * for more detailed information on what a click can be.
     *
     * @param {EventTarget~Event} [event]
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    AudioTrackMenuItem.prototype.handleClick = function handleClick(event) {
      var tracks = this.player_.audioTracks();

      _MenuItem.prototype.handleClick.call(this, event);

      for (var i = 0; i < tracks.length; i++) {
        var track = tracks[i];

        track.enabled = track === this.track;
      }
    };

    /**
     * Handle any {@link AudioTrack} change.
     *
     * @param {EventTarget~Event} [event]
     *        The {@link AudioTrackList#change} event that caused this to run.
     *
     * @listens AudioTrackList#change
     */


    AudioTrackMenuItem.prototype.handleTracksChange = function handleTracksChange(event) {
      this.selected(this.track.enabled);
    };

    return AudioTrackMenuItem;
  }(MenuItem);

  Component.registerComponent('AudioTrackMenuItem', AudioTrackMenuItem);

  /**
   * @file audio-track-button.js
   */

  /**
   * The base class for buttons that toggle specific {@link AudioTrack} types.
   *
   * @extends TrackButton
   */

  var AudioTrackButton = function (_TrackButton) {
    inherits(AudioTrackButton, _TrackButton);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options={}]
     *        The key/value store of player options.
     */
    function AudioTrackButton(player) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      classCallCheck(this, AudioTrackButton);

      options.tracks = player.audioTracks();

      return possibleConstructorReturn(this, _TrackButton.call(this, player, options));
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    AudioTrackButton.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-audio-button ' + _TrackButton.prototype.buildCSSClass.call(this);
    };

    AudioTrackButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {
      return 'vjs-audio-button ' + _TrackButton.prototype.buildWrapperCSSClass.call(this);
    };

    /**
     * Create a menu item for each audio track
     *
     * @param {AudioTrackMenuItem[]} [items=[]]
     *        An array of existing menu items to use.
     *
     * @return {AudioTrackMenuItem[]}
     *         An array of menu items
     */


    AudioTrackButton.prototype.createItems = function createItems() {
      var items = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];

      // if there's only one audio track, there no point in showing it
      this.hideThreshold_ = 1;

      var tracks = this.player_.audioTracks();

      for (var i = 0; i < tracks.length; i++) {
        var track = tracks[i];

        items.push(new AudioTrackMenuItem(this.player_, {
          track: track,
          // MenuItem is selectable
          selectable: true
        }));
      }

      return items;
    };

    return AudioTrackButton;
  }(TrackButton);

  /**
   * The text that should display over the `AudioTrackButton`s controls. Added for localization.
   *
   * @type {string}
   * @private
   */


  AudioTrackButton.prototype.controlText_ = 'Audio Track';
  Component.registerComponent('AudioTrackButton', AudioTrackButton);

  /**
   * @file playback-rate-menu-item.js
   */

  /**
   * The specific menu item type for selecting a playback rate.
   *
   * @extends MenuItem
   */

  var PlaybackRateMenuItem = function (_MenuItem) {
    inherits(PlaybackRateMenuItem, _MenuItem);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function PlaybackRateMenuItem(player, options) {
      classCallCheck(this, PlaybackRateMenuItem);

      var label = options.rate;
      var rate = parseFloat(label, 10);

      // Modify options for parent MenuItem class's init.
      options.label = label;
      options.selected = rate === 1;
      options.selectable = true;

      var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));

      _this.label = label;
      _this.rate = rate;

      _this.on(player, 'ratechange', _this.update);
      return _this;
    }

    /**
     * This gets called when an `PlaybackRateMenuItem` is "clicked". See
     * {@link ClickableComponent} for more detailed information on what a click can be.
     *
     * @param {EventTarget~Event} [event]
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    PlaybackRateMenuItem.prototype.handleClick = function handleClick(event) {
      _MenuItem.prototype.handleClick.call(this);
      this.player().playbackRate(this.rate);
    };

    /**
     * Update the PlaybackRateMenuItem when the playbackrate changes.
     *
     * @param {EventTarget~Event} [event]
     *        The `ratechange` event that caused this function to run.
     *
     * @listens Player#ratechange
     */


    PlaybackRateMenuItem.prototype.update = function update(event) {
      this.selected(this.player().playbackRate() === this.rate);
    };

    return PlaybackRateMenuItem;
  }(MenuItem);

  /**
   * The text that should display over the `PlaybackRateMenuItem`s controls. Added for localization.
   *
   * @type {string}
   * @private
   */


  PlaybackRateMenuItem.prototype.contentElType = 'button';

  Component.registerComponent('PlaybackRateMenuItem', PlaybackRateMenuItem);

  /**
   * @file playback-rate-menu-button.js
   */

  /**
   * The component for controlling the playback rate.
   *
   * @extends MenuButton
   */

  var PlaybackRateMenuButton = function (_MenuButton) {
    inherits(PlaybackRateMenuButton, _MenuButton);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     */
    function PlaybackRateMenuButton(player, options) {
      classCallCheck(this, PlaybackRateMenuButton);

      var _this = possibleConstructorReturn(this, _MenuButton.call(this, player, options));

      _this.updateVisibility();
      _this.updateLabel();

      _this.on(player, 'loadstart', _this.updateVisibility);
      _this.on(player, 'ratechange', _this.updateLabel);
      return _this;
    }

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    PlaybackRateMenuButton.prototype.createEl = function createEl$$1() {
      var el = _MenuButton.prototype.createEl.call(this);

      this.labelEl_ = createEl('div', {
        className: 'vjs-playback-rate-value',
        innerHTML: '1x'
      });

      el.appendChild(this.labelEl_);

      return el;
    };

    PlaybackRateMenuButton.prototype.dispose = function dispose() {
      this.labelEl_ = null;

      _MenuButton.prototype.dispose.call(this);
    };

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */


    PlaybackRateMenuButton.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-playback-rate ' + _MenuButton.prototype.buildCSSClass.call(this);
    };

    PlaybackRateMenuButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {
      return 'vjs-playback-rate ' + _MenuButton.prototype.buildWrapperCSSClass.call(this);
    };

    /**
     * Create the playback rate menu
     *
     * @return {Menu}
     *         Menu object populated with {@link PlaybackRateMenuItem}s
     */


    PlaybackRateMenuButton.prototype.createMenu = function createMenu() {
      var menu = new Menu(this.player());
      var rates = this.playbackRates();

      if (rates) {
        for (var i = rates.length - 1; i >= 0; i--) {
          menu.addChild(new PlaybackRateMenuItem(this.player(), {rate: rates[i] + 'x'}));
        }
      }

      return menu;
    };

    /**
     * Updates ARIA accessibility attributes
     */


    PlaybackRateMenuButton.prototype.updateARIAAttributes = function updateARIAAttributes() {
      // Current playback rate
      this.el().setAttribute('aria-valuenow', this.player().playbackRate());
    };

    /**
     * This gets called when an `PlaybackRateMenuButton` is "clicked". See
     * {@link ClickableComponent} for more detailed information on what a click can be.
     *
     * @param {EventTarget~Event} [event]
     *        The `keydown`, `tap`, or `click` event that caused this function to be
     *        called.
     *
     * @listens tap
     * @listens click
     */


    PlaybackRateMenuButton.prototype.handleClick = function handleClick(event) {
      // select next rate option
      var currentRate = this.player().playbackRate();
      var rates = this.playbackRates();

      // this will select first one if the last one currently selected
      var newRate = rates[0];

      for (var i = 0; i < rates.length; i++) {
        if (rates[i] > currentRate) {
          newRate = rates[i];
          break;
        }
      }
      this.player().playbackRate(newRate);
    };

    /**
     * Get possible playback rates
     *
     * @return {Array}
     *         All possible playback rates
     */


    PlaybackRateMenuButton.prototype.playbackRates = function playbackRates() {
      return this.options_.playbackRates || this.options_.playerOptions && this.options_.playerOptions.playbackRates;
    };

    /**
     * Get whether playback rates is supported by the tech
     * and an array of playback rates exists
     *
     * @return {boolean}
     *         Whether changing playback rate is supported
     */


    PlaybackRateMenuButton.prototype.playbackRateSupported = function playbackRateSupported() {
      return this.player().tech_ && this.player().tech_.featuresPlaybackRate && this.playbackRates() && this.playbackRates().length > 0;
    };

    /**
     * Hide playback rate controls when they're no playback rate options to select
     *
     * @param {EventTarget~Event} [event]
     *        The event that caused this function to run.
     *
     * @listens Player#loadstart
     */


    PlaybackRateMenuButton.prototype.updateVisibility = function updateVisibility(event) {
      if (this.playbackRateSupported()) {
        this.removeClass('vjs-hidden');
      } else {
        this.addClass('vjs-hidden');
      }
    };

    /**
     * Update button label when rate changed
     *
     * @param {EventTarget~Event} [event]
     *        The event that caused this function to run.
     *
     * @listens Player#ratechange
     */


    PlaybackRateMenuButton.prototype.updateLabel = function updateLabel(event) {
      if (this.playbackRateSupported()) {
        this.labelEl_.innerHTML = this.player().playbackRate() + 'x';
      }
    };

    return PlaybackRateMenuButton;
  }(MenuButton);

  /**
   * The text that should display over the `FullscreenToggle`s controls. Added for localization.
   *
   * @type {string}
   * @private
   */


  PlaybackRateMenuButton.prototype.controlText_ = 'Playback Rate';

  Component.registerComponent('PlaybackRateMenuButton', PlaybackRateMenuButton);

  /**
   * @file spacer.js
   */

  /**
   * Just an empty spacer element that can be used as an append point for plugins, etc.
   * Also can be used to create space between elements when necessary.
   *
   * @extends Component
   */

  var Spacer = function (_Component) {
    inherits(Spacer, _Component);

    function Spacer() {
      classCallCheck(this, Spacer);
      return possibleConstructorReturn(this, _Component.apply(this, arguments));
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */
    Spacer.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-spacer ' + _Component.prototype.buildCSSClass.call(this);
    };

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    Spacer.prototype.createEl = function createEl() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: this.buildCSSClass()
      });
    };

    return Spacer;
  }(Component);

  Component.registerComponent('Spacer', Spacer);

  /**
   * @file custom-control-spacer.js
   */

  /**
   * Spacer specifically meant to be used as an insertion point for new plugins, etc.
   *
   * @extends Spacer
   */

  var CustomControlSpacer = function (_Spacer) {
    inherits(CustomControlSpacer, _Spacer);

    function CustomControlSpacer() {
      classCallCheck(this, CustomControlSpacer);
      return possibleConstructorReturn(this, _Spacer.apply(this, arguments));
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     */
    CustomControlSpacer.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-custom-control-spacer ' + _Spacer.prototype.buildCSSClass.call(this);
    };

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */


    CustomControlSpacer.prototype.createEl = function createEl() {
      var el = _Spacer.prototype.createEl.call(this, {
        className: this.buildCSSClass()
      });

      // No-flex/table-cell mode requires there be some content
      // in the cell to fill the remaining space of the table.
      el.innerHTML = '\xA0';
      return el;
    };

    return CustomControlSpacer;
  }(Spacer);

  Component.registerComponent('CustomControlSpacer', CustomControlSpacer);

  /**
   * @file control-bar.js
   */

  /**
   * Container of main controls.
   *
   * @extends Component
   */

  var ControlBar = function (_Component) {
    inherits(ControlBar, _Component);

    function ControlBar() {
      classCallCheck(this, ControlBar);
      return possibleConstructorReturn(this, _Component.apply(this, arguments));
    }

    /**
     * Create the `Component`'s DOM element
     *
     * @return {Element}
     *         The element that was created.
     */
    ControlBar.prototype.createEl = function createEl() {
      return _Component.prototype.createEl.call(this, 'div', {
        className: 'vjs-control-bar',
        dir: 'ltr'
      });
    };

    return ControlBar;
  }(Component);

  /**
   * Default options for `ControlBar`
   *
   * @type {Object}
   * @private
   */


  ControlBar.prototype.options_ = {
    children: ['playToggle', 'volumePanel', 'currentTimeDisplay', 'timeDivider', 'durationDisplay', 'progressControl', 'liveDisplay', 'remainingTimeDisplay', 'customControlSpacer', 'playbackRateMenuButton', 'chaptersButton', 'descriptionsButton', 'subsCapsButton', 'audioTrackButton', 'fullscreenToggle']
  };

  Component.registerComponent('ControlBar', ControlBar);

  /**
   * @file error-display.js
   */

  /**
   * A display that indicates an error has occurred. This means that the video
   * is unplayable.
   *
   * @extends ModalDialog
   */

  var ErrorDisplay = function (_ModalDialog) {
    inherits(ErrorDisplay, _ModalDialog);

    /**
     * Creates an instance of this class.
     *
     * @param  {Player} player
     *         The `Player` that this class should be attached to.
     *
     * @param  {Object} [options]
     *         The key/value store of player options.
     */
    function ErrorDisplay(player, options) {
      classCallCheck(this, ErrorDisplay);

      var _this = possibleConstructorReturn(this, _ModalDialog.call(this, player, options));

      _this.on(player, 'error', _this.open);
      return _this;
    }

    /**
     * Builds the default DOM `className`.
     *
     * @return {string}
     *         The DOM `className` for this object.
     *
     * @deprecated Since version 5.
     */


    ErrorDisplay.prototype.buildCSSClass = function buildCSSClass() {
      return 'vjs-error-display ' + _ModalDialog.prototype.buildCSSClass.call(this);
    };

    /**
     * Gets the localized error message based on the `Player`s error.
     *
     * @return {string}
     *         The `Player`s error message localized or an empty string.
     */


    ErrorDisplay.prototype.content = function content() {
      var error = this.player().error();

      return error ? this.localize(error.message) : '';
    };

    return ErrorDisplay;
  }(ModalDialog);

  /**
   * The default options for an `ErrorDisplay`.
   *
   * @private
   */


  ErrorDisplay.prototype.options_ = mergeOptions(ModalDialog.prototype.options_, {
    pauseOnOpen: false,
    fillAlways: true,
    temporary: false,
    uncloseable: true
  });

  Component.registerComponent('ErrorDisplay', ErrorDisplay);

  /**
   * @file text-track-settings.js
   */

  var LOCAL_STORAGE_KEY = 'vjs-text-track-settings';

  var COLOR_BLACK = ['#000', 'Black'];
  var COLOR_BLUE = ['#00F', 'Blue'];
  var COLOR_CYAN = ['#0FF', 'Cyan'];
  var COLOR_GREEN = ['#0F0', 'Green'];
  var COLOR_MAGENTA = ['#F0F', 'Magenta'];
  var COLOR_RED = ['#F00', 'Red'];
  var COLOR_WHITE = ['#FFF', 'White'];
  var COLOR_YELLOW = ['#FF0', 'Yellow'];

  var OPACITY_OPAQUE = ['1', 'Opaque'];
  var OPACITY_SEMI = ['0.5', 'Semi-Transparent'];
  var OPACITY_TRANS = ['0', 'Transparent'];

  // Configuration for the various <select> elements in the DOM of this component.
  //
  // Possible keys include:
  //
  // `default`:
  //   The default option index. Only needs to be provided if not zero.
  // `parser`:
  //   A function which is used to parse the value from the selected option in
  //   a customized way.
  // `selector`:
  //   The selector used to find the associated <select> element.
  var selectConfigs = {
    backgroundColor: {
      selector: '.vjs-bg-color > select',
      id: 'captions-background-color-%s',
      label: 'Color',
      options: [COLOR_BLACK, COLOR_WHITE, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]
    },

    backgroundOpacity: {
      selector: '.vjs-bg-opacity > select',
      id: 'captions-background-opacity-%s',
      label: 'Transparency',
      options: [OPACITY_OPAQUE, OPACITY_SEMI, OPACITY_TRANS]
    },

    color: {
      selector: '.vjs-fg-color > select',
      id: 'captions-foreground-color-%s',
      label: 'Color',
      options: [COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]
    },

    edgeStyle: {
      selector: '.vjs-edge-style > select',
      id: '%s',
      label: 'Text Edge Style',
      options: [['none', 'None'], ['raised', 'Raised'], ['depressed', 'Depressed'], ['uniform', 'Uniform'], ['dropshadow', 'Dropshadow']]
    },

    fontFamily: {
      selector: '.vjs-font-family > select',
      id: 'captions-font-family-%s',
      label: 'Font Family',
      options: [['proportionalSansSerif', 'Proportional Sans-Serif'], ['monospaceSansSerif', 'Monospace Sans-Serif'], ['proportionalSerif', 'Proportional Serif'], ['monospaceSerif', 'Monospace Serif'], ['casual', 'Casual'], ['script', 'Script'], ['small-caps', 'Small Caps']]
    },

    fontPercent: {
      selector: '.vjs-font-percent > select',
      id: 'captions-font-size-%s',
      label: 'Font Size',
      options: [['0.50', '50%'], ['0.75', '75%'], ['1.00', '100%'], ['1.25', '125%'], ['1.50', '150%'], ['1.75', '175%'], ['2.00', '200%'], ['3.00', '300%'], ['4.00', '400%']],
      default: 2,
      parser: function parser(v) {
        return v === '1.00' ? null : Number(v);
      }
    },

    textOpacity: {
      selector: '.vjs-text-opacity > select',
      id: 'captions-foreground-opacity-%s',
      label: 'Transparency',
      options: [OPACITY_OPAQUE, OPACITY_SEMI]
    },

    // Options for this object are defined below.
    windowColor: {
      selector: '.vjs-window-color > select',
      id: 'captions-window-color-%s',
      label: 'Color'
    },

    // Options for this object are defined below.
    windowOpacity: {
      selector: '.vjs-window-opacity > select',
      id: 'captions-window-opacity-%s',
      label: 'Transparency',
      options: [OPACITY_TRANS, OPACITY_SEMI, OPACITY_OPAQUE]
    }
  };

  selectConfigs.windowColor.options = selectConfigs.backgroundColor.options;

  /**
   * Get the actual value of an option.
   *
   * @param  {string} value
   *         The value to get
   *
   * @param  {Function} [parser]
   *         Optional function to adjust the value.
   *
   * @return {Mixed}
   *         - Will be `undefined` if no value exists
   *         - Will be `undefined` if the given value is "none".
   *         - Will be the actual value otherwise.
   *
   * @private
   */
  function parseOptionValue(value, parser) {
    if (parser) {
      value = parser(value);
    }

    if (value && value !== 'none') {
      return value;
    }
  }

  /**
   * Gets the value of the selected <option> element within a <select> element.
   *
   * @param  {Element} el
   *         the element to look in
   *
   * @param  {Function} [parser]
   *         Optional function to adjust the value.
   *
   * @return {Mixed}
   *         - Will be `undefined` if no value exists
   *         - Will be `undefined` if the given value is "none".
   *         - Will be the actual value otherwise.
   *
   * @private
   */
  function getSelectedOptionValue(el, parser) {
    var value = el.options[el.options.selectedIndex].value;

    return parseOptionValue(value, parser);
  }

  /**
   * Sets the selected <option> element within a <select> element based on a
   * given value.
   *
   * @param {Element} el
   *        The element to look in.
   *
   * @param {string} value
   *        the property to look on.
   *
   * @param {Function} [parser]
   *        Optional function to adjust the value before comparing.
   *
   * @private
   */
  function setSelectedOption(el, value, parser) {
    if (!value) {
      return;
    }

    for (var i = 0; i < el.options.length; i++) {
      if (parseOptionValue(el.options[i].value, parser) === value) {
        el.selectedIndex = i;
        break;
      }
    }
  }

  /**
   * Manipulate Text Tracks settings.
   *
   * @extends ModalDialog
   */

  var TextTrackSettings = function (_ModalDialog) {
    inherits(TextTrackSettings, _ModalDialog);

    /**
     * Creates an instance of this class.
     *
     * @param {Player} player
     *         The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *         The key/value store of player options.
     */
    function TextTrackSettings(player, options) {
      classCallCheck(this, TextTrackSettings);

      options.temporary = false;

      var _this = possibleConstructorReturn(this, _ModalDialog.call(this, player, options));

      _this.updateDisplay = bind(_this, _this.updateDisplay);

      // fill the modal and pretend we have opened it
      _this.fill();
      _this.hasBeenOpened_ = _this.hasBeenFilled_ = true;

      _this.endDialog = createEl('p', {
        className: 'vjs-control-text',
        textContent: _this.localize('End of dialog window.')
      });
      _this.el().appendChild(_this.endDialog);

      _this.setDefaults();

      // Grab `persistTextTrackSettings` from the player options if not passed in child options
      if (options.persistTextTrackSettings === undefined) {
        _this.options_.persistTextTrackSettings = _this.options_.playerOptions.persistTextTrackSettings;
      }

      _this.on(_this.$('.vjs-done-button'), 'click', function () {
        _this.saveSettings();
        _this.close();
      });

      _this.on(_this.$('.vjs-default-button'), 'click', function () {
        _this.setDefaults();
        _this.updateDisplay();
      });

      each(selectConfigs, function (config) {
        _this.on(_this.$(config.selector), 'change', _this.updateDisplay);
      });

      if (_this.options_.persistTextTrackSettings) {
        _this.restoreSettings();
      }
      return _this;
    }

    TextTrackSettings.prototype.dispose = function dispose() {
      this.endDialog = null;

      _ModalDialog.prototype.dispose.call(this);
    };

    /**
     * Create a <select> element with configured options.
     *
     * @param {string} key
     *        Configuration key to use during creation.
     *
     * @return {string}
     *         An HTML string.
     *
     * @private
     */


    TextTrackSettings.prototype.createElSelect_ = function createElSelect_(key) {
      var _this2 = this;

      var legendId = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
      var type = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'label';

      var config = selectConfigs[key];
      var id = config.id.replace('%s', this.id_);
      var selectLabelledbyIds = [legendId, id].join(' ').trim();

      return ['<' + type + ' id="' + id + '" class="' + (type === 'label' ? 'vjs-label' : '') + '">', this.localize(config.label), '</' + type + '>', '<select aria-labelledby="' + selectLabelledbyIds + '">'].concat(config.options.map(function (o) {
        var optionId = id + '-' + o[1].replace(/\W+/g, '');

        return ['<option id="' + optionId + '" value="' + o[0] + '" ', 'aria-labelledby="' + selectLabelledbyIds + ' ' + optionId + '">', _this2.localize(o[1]), '</option>'].join('');
      })).concat('</select>').join('');
    };

    /**
     * Create foreground color element for the component
     *
     * @return {string}
     *         An HTML string.
     *
     * @private
     */


    TextTrackSettings.prototype.createElFgColor_ = function createElFgColor_() {
      var legendId = 'captions-text-legend-' + this.id_;

      return ['<fieldset class="vjs-fg-color vjs-track-setting">', '<legend id="' + legendId + '">', this.localize('Text'), '</legend>', this.createElSelect_('color', legendId), '<span class="vjs-text-opacity vjs-opacity">', this.createElSelect_('textOpacity', legendId), '</span>', '</fieldset>'].join('');
    };

    /**
     * Create background color element for the component
     *
     * @return {string}
     *         An HTML string.
     *
     * @private
     */


    TextTrackSettings.prototype.createElBgColor_ = function createElBgColor_() {
      var legendId = 'captions-background-' + this.id_;

      return ['<fieldset class="vjs-bg-color vjs-track-setting">', '<legend id="' + legendId + '">', this.localize('Background'), '</legend>', this.createElSelect_('backgroundColor', legendId), '<span class="vjs-bg-opacity vjs-opacity">', this.createElSelect_('backgroundOpacity', legendId), '</span>', '</fieldset>'].join('');
    };

    /**
     * Create window color element for the component
     *
     * @return {string}
     *         An HTML string.
     *
     * @private
     */


    TextTrackSettings.prototype.createElWinColor_ = function createElWinColor_() {
      var legendId = 'captions-window-' + this.id_;

      return ['<fieldset class="vjs-window-color vjs-track-setting">', '<legend id="' + legendId + '">', this.localize('Window'), '</legend>', this.createElSelect_('windowColor', legendId), '<span class="vjs-window-opacity vjs-opacity">', this.createElSelect_('windowOpacity', legendId), '</span>', '</fieldset>'].join('');
    };

    /**
     * Create color elements for the component
     *
     * @return {Element}
     *         The element that was created
     *
     * @private
     */


    TextTrackSettings.prototype.createElColors_ = function createElColors_() {
      return createEl('div', {
        className: 'vjs-track-settings-colors',
        innerHTML: [this.createElFgColor_(), this.createElBgColor_(), this.createElWinColor_()].join('')
      });
    };

    /**
     * Create font elements for the component
     *
     * @return {Element}
     *         The element that was created.
     *
     * @private
     */


    TextTrackSettings.prototype.createElFont_ = function createElFont_() {
      return createEl('div', {
        className: 'vjs-track-settings-font',
        innerHTML: ['<fieldset class="vjs-font-percent vjs-track-setting">', this.createElSelect_('fontPercent', '', 'legend'), '</fieldset>', '<fieldset class="vjs-edge-style vjs-track-setting">', this.createElSelect_('edgeStyle', '', 'legend'), '</fieldset>', '<fieldset class="vjs-font-family vjs-track-setting">', this.createElSelect_('fontFamily', '', 'legend'), '</fieldset>'].join('')
      });
    };

    /**
     * Create controls for the component
     *
     * @return {Element}
     *         The element that was created.
     *
     * @private
     */


    TextTrackSettings.prototype.createElControls_ = function createElControls_() {
      var defaultsDescription = this.localize('restore all settings to the default values');

      return createEl('div', {
        className: 'vjs-track-settings-controls',
        innerHTML: ['<button class="vjs-default-button" title="' + defaultsDescription + '">', this.localize('Reset'), '<span class="vjs-control-text"> ' + defaultsDescription + '</span>', '</button>', '<button class="vjs-done-button">' + this.localize('Done') + '</button>'].join('')
      });
    };

    TextTrackSettings.prototype.content = function content() {
      return [this.createElColors_(), this.createElFont_(), this.createElControls_()];
    };

    TextTrackSettings.prototype.label = function label() {
      return this.localize('Caption Settings Dialog');
    };

    TextTrackSettings.prototype.description = function description() {
      return this.localize('Beginning of dialog window. Escape will cancel and close the window.');
    };

    TextTrackSettings.prototype.buildCSSClass = function buildCSSClass() {
      return _ModalDialog.prototype.buildCSSClass.call(this) + ' vjs-text-track-settings';
    };

    /**
     * Gets an object of text track settings (or null).
     *
     * @return {Object}
     *         An object with config values parsed from the DOM or localStorage.
     */


    TextTrackSettings.prototype.getValues = function getValues() {
      var _this3 = this;

      return reduce(selectConfigs, function (accum, config, key) {
        var value = getSelectedOptionValue(_this3.$(config.selector), config.parser);

        if (value !== undefined) {
          accum[key] = value;
        }

        return accum;
      }, {});
    };

    /**
     * Sets text track settings from an object of values.
     *
     * @param {Object} values
     *        An object with config values parsed from the DOM or localStorage.
     */


    TextTrackSettings.prototype.setValues = function setValues(values) {
      var _this4 = this;

      each(selectConfigs, function (config, key) {
        setSelectedOption(_this4.$(config.selector), values[key], config.parser);
      });
    };

    /**
     * Sets all `<select>` elements to their default values.
     */


    TextTrackSettings.prototype.setDefaults = function setDefaults() {
      var _this5 = this;

      each(selectConfigs, function (config) {
        var index = config.hasOwnProperty('default') ? config.default : 0;

        _this5.$(config.selector).selectedIndex = index;
      });
    };

    /**
     * Restore texttrack settings from localStorage
     */


    TextTrackSettings.prototype.restoreSettings = function restoreSettings() {
      var values = void 0;

      try {
        values = JSON.parse(window_1.localStorage.getItem(LOCAL_STORAGE_KEY));
      } catch (err) {
        log$1.warn(err);
      }

      if (values) {
        this.setValues(values);
      }
    };

    /**
     * Save text track settings to localStorage
     */


    TextTrackSettings.prototype.saveSettings = function saveSettings() {
      if (!this.options_.persistTextTrackSettings) {
        return;
      }

      var values = this.getValues();

      try {
        if (Object.keys(values).length) {
          window_1.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(values));
        } else {
          window_1.localStorage.removeItem(LOCAL_STORAGE_KEY);
        }
      } catch (err) {
        log$1.warn(err);
      }
    };

    /**
     * Update display of text track settings
     */


    TextTrackSettings.prototype.updateDisplay = function updateDisplay() {
      var ttDisplay = this.player_.getChild('textTrackDisplay');

      if (ttDisplay) {
        ttDisplay.updateDisplay();
      }
    };

    /**
     * conditionally blur the element and refocus the captions button
     *
     * @private
     */


    TextTrackSettings.prototype.conditionalBlur_ = function conditionalBlur_() {
      this.previouslyActiveEl_ = null;
      this.off(document_1, 'keydown', this.handleKeyDown);

      var cb = this.player_.controlBar;
      var subsCapsBtn = cb && cb.subsCapsButton;
      var ccBtn = cb && cb.captionsButton;

      if (subsCapsBtn) {
        subsCapsBtn.focus();
      } else if (ccBtn) {
        ccBtn.focus();
      }
    };

    return TextTrackSettings;
  }(ModalDialog);

  Component.registerComponent('TextTrackSettings', TextTrackSettings);

  /**
   * @file resize-manager.js
   */

  /**
   * A Resize Manager. It is in charge of triggering `playerresize` on the player in the right conditions.
   *
   * It'll either create an iframe and use a debounced resize handler on it or use the new {@link https://wicg.github.io/ResizeObserver/|ResizeObserver}.
   *
   * If the ResizeObserver is available natively, it will be used. A polyfill can be passed in as an option.
   * If a `playerresize` event is not needed, the ResizeManager component can be removed from the player, see the example below.
   * @example <caption>How to disable the resize manager</caption>
   * const player = videojs('#vid', {
   *   resizeManager: false
   * });
   *
   * @see {@link https://wicg.github.io/ResizeObserver/|ResizeObserver specification}
   *
   * @extends Component
   */

  var ResizeManager = function (_Component) {
    inherits(ResizeManager, _Component);

    /**
     * Create the ResizeManager.
     *
     * @param {Object} player
     *        The `Player` that this class should be attached to.
     *
     * @param {Object} [options]
     *        The key/value store of ResizeManager options.
     *
     * @param {Object} [options.ResizeObserver]
     *        A polyfill for ResizeObserver can be passed in here.
     *        If this is set to null it will ignore the native ResizeObserver and fall back to the iframe fallback.
     */
    function ResizeManager(player, options) {
      classCallCheck(this, ResizeManager);

      var RESIZE_OBSERVER_AVAILABLE = options.ResizeObserver || window_1.ResizeObserver;

      // if `null` was passed, we want to disable the ResizeObserver
      if (options.ResizeObserver === null) {
        RESIZE_OBSERVER_AVAILABLE = false;
      }

      // Only create an element when ResizeObserver isn't available
      var options_ = mergeOptions({createEl: !RESIZE_OBSERVER_AVAILABLE}, options);

      var _this = possibleConstructorReturn(this, _Component.call(this, player, options_));

      _this.ResizeObserver = options.ResizeObserver || window_1.ResizeObserver;
      _this.loadListener_ = null;
      _this.resizeObserver_ = null;
      _this.debouncedHandler_ = debounce(function () {
        _this.resizeHandler();
      }, 100, false, player);

      if (RESIZE_OBSERVER_AVAILABLE) {
        _this.resizeObserver_ = new _this.ResizeObserver(_this.debouncedHandler_);
        _this.resizeObserver_.observe(player.el());
      } else {
        _this.loadListener_ = function () {
          if (_this.el_.contentWindow) {
            on(_this.el_.contentWindow, 'resize', _this.debouncedHandler_);
          }
          _this.off('load', _this.loadListener_);
        };

        _this.on('load', _this.loadListener_);
      }
      return _this;
    }

    ResizeManager.prototype.createEl = function createEl() {
      return _Component.prototype.createEl.call(this, 'iframe', {
        className: 'vjs-resize-manager'
      });
    };

    /**
     * Called when a resize is triggered on the iframe or a resize is observed via the ResizeObserver
     *
     * @fires Player#playerresize
     */


    ResizeManager.prototype.resizeHandler = function resizeHandler() {
      /**
       * Called when the player size has changed
       *
       * @event Player#playerresize
       * @type {EventTarget~Event}
       */
      this.player_.trigger('playerresize');
    };

    ResizeManager.prototype.dispose = function dispose() {
      if (this.resizeObserver_) {
        this.resizeObserver_.unobserve(this.player_.el());
        this.resizeObserver_.disconnect();
      }

      if (this.el_ && this.el_.contentWindow) {
        off(this.el_.contentWindow, 'resize', this.debouncedHandler_);
      }

      if (this.loadListener_) {
        this.off('load', this.loadListener_);
      }

      this.ResizeObserver = null;
      this.resizeObserver = null;
      this.debouncedHandler_ = null;
      this.loadListener_ = null;
    };

    return ResizeManager;
  }(Component);

  Component.registerComponent('ResizeManager', ResizeManager);

  /**
   * This function is used to fire a sourceset when there is something
   * similar to `mediaEl.load()` being called. It will try to find the source via
   * the `src` attribute and then the `<source>` elements. It will then fire `sourceset`
   * with the source that was found or empty string if we cannot know. If it cannot
   * find a source then `sourceset` will not be fired.
   *
   * @param {Html5} tech
   *        The tech object that sourceset was setup on
   *
   * @return {boolean}
   *         returns false if the sourceset was not fired and true otherwise.
   */
  var sourcesetLoad = function sourcesetLoad(tech) {
    var el = tech.el();

    // if `el.src` is set, that source will be loaded.
    if (el.hasAttribute('src')) {
      tech.triggerSourceset(el.src);
      return true;
    }

    /**
     * Since there isn't a src property on the media element, source elements will be used for
     * implementing the source selection algorithm. This happens asynchronously and
     * for most cases were there is more than one source we cannot tell what source will
     * be loaded, without re-implementing the source selection algorithm. At this time we are not
     * going to do that. There are three special cases that we do handle here though:
     *
     * 1. If there are no sources, do not fire `sourceset`.
     * 2. If there is only one `<source>` with a `src` property/attribute that is our `src`
     * 3. If there is more than one `<source>` but all of them have the same `src` url.
     *    That will be our src.
     */
    var sources = tech.$$('source');
    var srcUrls = [];
    var src = '';

    // if there are no sources, do not fire sourceset
    if (!sources.length) {
      return false;
    }

    // only count valid/non-duplicate source elements
    for (var i = 0; i < sources.length; i++) {
      var url = sources[i].src;

      if (url && srcUrls.indexOf(url) === -1) {
        srcUrls.push(url);
      }
    }

    // there were no valid sources
    if (!srcUrls.length) {
      return false;
    }

    // there is only one valid source element url
    // use that
    if (srcUrls.length === 1) {
      src = srcUrls[0];
    }

    tech.triggerSourceset(src);
    return true;
  };

  /**
   * our implementation of an `innerHTML` descriptor for browsers
   * that do not have one.
   */
  var innerHTMLDescriptorPolyfill = Object.defineProperty({}, 'innerHTML', {
    get: function get() {
      return this.cloneNode(true).innerHTML;
    },
    set: function set(v) {
      // make a dummy node to use innerHTML on
      var dummy = document_1.createElement(this.nodeName.toLowerCase());

      // set innerHTML to the value provided
      dummy.innerHTML = v;

      // make a document fragment to hold the nodes from dummy
      var docFrag = document_1.createDocumentFragment();

      // copy all of the nodes created by the innerHTML on dummy
      // to the document fragment
      while (dummy.childNodes.length) {
        docFrag.appendChild(dummy.childNodes[0]);
      }

      // remove content
      this.innerText = '';

      // now we add all of that html in one by appending the
      // document fragment. This is how innerHTML does it.
      window_1.Element.prototype.appendChild.call(this, docFrag);

      // then return the result that innerHTML's setter would
      return this.innerHTML;
    }
  });

  /**
   * Get a property descriptor given a list of priorities and the
   * property to get.
   */
  var getDescriptor = function getDescriptor(priority, prop) {
    var descriptor = {};

    for (var i = 0; i < priority.length; i++) {
      descriptor = Object.getOwnPropertyDescriptor(priority[i], prop);

      if (descriptor && descriptor.set && descriptor.get) {
        break;
      }
    }

    descriptor.enumerable = true;
    descriptor.configurable = true;

    return descriptor;
  };

  var getInnerHTMLDescriptor = function getInnerHTMLDescriptor(tech) {
    return getDescriptor([tech.el(), window_1.HTMLMediaElement.prototype, window_1.Element.prototype, innerHTMLDescriptorPolyfill], 'innerHTML');
  };

  /**
   * Patches browser internal functions so that we can tell synchronously
   * if a `<source>` was appended to the media element. For some reason this
   * causes a `sourceset` if the the media element is ready and has no source.
   * This happens when:
   * - The page has just loaded and the media element does not have a source.
   * - The media element was emptied of all sources, then `load()` was called.
   *
   * It does this by patching the following functions/properties when they are supported:
   *
   * - `append()` - can be used to add a `<source>` element to the media element
   * - `appendChild()` - can be used to add a `<source>` element to the media element
   * - `insertAdjacentHTML()` -  can be used to add a `<source>` element to the media element
   * - `innerHTML` -  can be used to add a `<source>` element to the media element
   *
   * @param {Html5} tech
   *        The tech object that sourceset is being setup on.
   */
  var firstSourceWatch = function firstSourceWatch(tech) {
    var el = tech.el();

    // make sure firstSourceWatch isn't setup twice.
    if (el.resetSourceWatch_) {
      return;
    }

    var old = {};
    var innerDescriptor = getInnerHTMLDescriptor(tech);
    var appendWrapper = function appendWrapper(appendFn) {
      return function () {
        for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }

        var retval = appendFn.apply(el, args);

        sourcesetLoad(tech);

        return retval;
      };
    };

    ['append', 'appendChild', 'insertAdjacentHTML'].forEach(function (k) {
      if (!el[k]) {
        return;
      }

      // store the old function
      old[k] = el[k];

      // call the old function with a sourceset if a source
      // was loaded
      el[k] = appendWrapper(old[k]);
    });

    Object.defineProperty(el, 'innerHTML', mergeOptions(innerDescriptor, {
      set: appendWrapper(innerDescriptor.set)
    }));

    el.resetSourceWatch_ = function () {
      el.resetSourceWatch_ = null;
      Object.keys(old).forEach(function (k) {
        el[k] = old[k];
      });

      Object.defineProperty(el, 'innerHTML', innerDescriptor);
    };

    // on the first sourceset, we need to revert our changes
    tech.one('sourceset', el.resetSourceWatch_);
  };

  /**
   * our implementation of a `src` descriptor for browsers
   * that do not have one.
   */
  var srcDescriptorPolyfill = Object.defineProperty({}, 'src', {
    get: function get() {
      if (this.hasAttribute('src')) {
        return getAbsoluteURL(window_1.Element.prototype.getAttribute.call(this, 'src'));
      }

      return '';
    },
    set: function set(v) {
      window_1.Element.prototype.setAttribute.call(this, 'src', v);

      return v;
    }
  });

  var getSrcDescriptor = function getSrcDescriptor(tech) {
    return getDescriptor([tech.el(), window_1.HTMLMediaElement.prototype, srcDescriptorPolyfill], 'src');
  };

  /**
   * setup `sourceset` handling on the `Html5` tech. This function
   * patches the following element properties/functions:
   *
   * - `src` - to determine when `src` is set
   * - `setAttribute()` - to determine when `src` is set
   * - `load()` - this re-triggers the source selection algorithm, and can
   *              cause a sourceset.
   *
   * If there is no source when we are adding `sourceset` support or during a `load()`
   * we also patch the functions listed in `firstSourceWatch`.
   *
   * @param {Html5} tech
   *        The tech to patch
   */
  var setupSourceset = function setupSourceset(tech) {
    if (!tech.featuresSourceset) {
      return;
    }

    var el = tech.el();

    // make sure sourceset isn't setup twice.
    if (el.resetSourceset_) {
      return;
    }

    var srcDescriptor = getSrcDescriptor(tech);
    var oldSetAttribute = el.setAttribute;
    var oldLoad = el.load;

    Object.defineProperty(el, 'src', mergeOptions(srcDescriptor, {
      set: function set(v) {
        var retval = srcDescriptor.set.call(el, v);

        // we use the getter here to get the actual value set on src
        tech.triggerSourceset(el.src);

        return retval;
      }
    }));

    el.setAttribute = function (n, v) {
      var retval = oldSetAttribute.call(el, n, v);

      if (/src/i.test(n)) {
        tech.triggerSourceset(el.src);
      }

      return retval;
    };

    el.load = function () {
      var retval = oldLoad.call(el);

      // if load was called, but there was no source to fire
      // sourceset on. We have to watch for a source append
      // as that can trigger a `sourceset` when the media element
      // has no source
      if (!sourcesetLoad(tech)) {
        tech.triggerSourceset('');
        firstSourceWatch(tech);
      }

      return retval;
    };

    if (el.currentSrc) {
      tech.triggerSourceset(el.currentSrc);
    } else if (!sourcesetLoad(tech)) {
      firstSourceWatch(tech);
    }

    el.resetSourceset_ = function () {
      el.resetSourceset_ = null;
      el.load = oldLoad;
      el.setAttribute = oldSetAttribute;
      Object.defineProperty(el, 'src', srcDescriptor);
      if (el.resetSourceWatch_) {
        el.resetSourceWatch_();
      }
    };
  };

  var _templateObject$1 = taggedTemplateLiteralLoose(['Text Tracks are being loaded from another origin but the crossorigin attribute isn\'t used.\n            This may prevent text tracks from loading.'], ['Text Tracks are being loaded from another origin but the crossorigin attribute isn\'t used.\n            This may prevent text tracks from loading.']);

  /**
   * HTML5 Media Controller - Wrapper for HTML5 Media API
   *
   * @mixes Tech~SourceHandlerAdditions
   * @extends Tech
   */

  var Html5 = function (_Tech) {
    inherits(Html5, _Tech);

    /**
     * Create an instance of this Tech.
     *
     * @param {Object} [options]
     *        The key/value store of player options.
     *
     * @param {Component~ReadyCallback} ready
     *        Callback function to call when the `HTML5` Tech is ready.
     */
    function Html5(options, ready) {
      classCallCheck(this, Html5);

      var _this = possibleConstructorReturn(this, _Tech.call(this, options, ready));

      var source = options.source;
      var crossoriginTracks = false;

      // Set the source if one is provided
      // 1) Check if the source is new (if not, we want to keep the original so playback isn't interrupted)
      // 2) Check to see if the network state of the tag was failed at init, and if so, reset the source
      // anyway so the error gets fired.
      if (source && (_this.el_.currentSrc !== source.src || options.tag && options.tag.initNetworkState_ === 3)) {
        _this.setSource(source);
      } else {
        _this.handleLateInit_(_this.el_);
      }

      // setup sourceset after late sourceset/init
      if (options.enableSourceset) {
        _this.setupSourcesetHandling_();
      }

      if (_this.el_.hasChildNodes()) {

        var nodes = _this.el_.childNodes;
        var nodesLength = nodes.length;
        var removeNodes = [];

        while (nodesLength--) {
          var node = nodes[nodesLength];
          var nodeName = node.nodeName.toLowerCase();

          if (nodeName === 'track') {
            if (!_this.featuresNativeTextTracks) {
              // Empty video tag tracks so the built-in player doesn't use them also.
              // This may not be fast enough to stop HTML5 browsers from reading the tags
              // so we'll need to turn off any default tracks if we're manually doing
              // captions and subtitles. videoElement.textTracks
              removeNodes.push(node);
            } else {
              // store HTMLTrackElement and TextTrack to remote list
              _this.remoteTextTrackEls().addTrackElement_(node);
              _this.remoteTextTracks().addTrack(node.track);
              _this.textTracks().addTrack(node.track);
              if (!crossoriginTracks && !_this.el_.hasAttribute('crossorigin') && isCrossOrigin(node.src)) {
                crossoriginTracks = true;
              }
            }
          }
        }

        for (var i = 0; i < removeNodes.length; i++) {
          _this.el_.removeChild(removeNodes[i]);
        }
      }

      _this.proxyNativeTracks_();
      if (_this.featuresNativeTextTracks && crossoriginTracks) {
        log$1.warn(tsml(_templateObject$1));
      }

      // prevent iOS Safari from disabling metadata text tracks during native playback
      _this.restoreMetadataTracksInIOSNativePlayer_();

      // Determine if native controls should be used
      // Our goal should be to get the custom controls on mobile solid everywhere
      // so we can remove this all together. Right now this will block custom
      // controls on touch enabled laptops like the Chrome Pixel
      if ((TOUCH_ENABLED || IS_IPHONE || IS_NATIVE_ANDROID) && options.nativeControlsForTouch === true) {
        _this.setControls(true);
      }

      // on iOS, we want to proxy `webkitbeginfullscreen` and `webkitendfullscreen`
      // into a `fullscreenchange` event
      _this.proxyWebkitFullscreen_();

      _this.triggerReady();
      return _this;
    }

    /**
     * Dispose of `HTML5` media element and remove all tracks.
     */


    Html5.prototype.dispose = function dispose() {
      if (this.el_.resetSourceset_) {
        this.el_.resetSourceset_();
      }
      Html5.disposeMediaElement(this.el_);
      this.options_ = null;

      // tech will handle clearing of the emulated track list
      _Tech.prototype.dispose.call(this);
    };

    /**
     * Modify the media element so that we can detect when
     * the source is changed. Fires `sourceset` just after the source has changed
     */


    Html5.prototype.setupSourcesetHandling_ = function setupSourcesetHandling_() {
      setupSourceset(this);
    };

    /**
     * When a captions track is enabled in the iOS Safari native player, all other
     * tracks are disabled (including metadata tracks), which nulls all of their
     * associated cue points. This will restore metadata tracks to their pre-fullscreen
     * state in those cases so that cue points are not needlessly lost.
     *
     * @private
     */


    Html5.prototype.restoreMetadataTracksInIOSNativePlayer_ = function restoreMetadataTracksInIOSNativePlayer_() {
      var textTracks = this.textTracks();
      var metadataTracksPreFullscreenState = void 0;

      // captures a snapshot of every metadata track's current state
      var takeMetadataTrackSnapshot = function takeMetadataTrackSnapshot() {
        metadataTracksPreFullscreenState = [];

        for (var i = 0; i < textTracks.length; i++) {
          var track = textTracks[i];

          if (track.kind === 'metadata') {
            metadataTracksPreFullscreenState.push({
              track: track,
              storedMode: track.mode
            });
          }
        }
      };

      // snapshot each metadata track's initial state, and update the snapshot
      // each time there is a track 'change' event
      takeMetadataTrackSnapshot();
      textTracks.addEventListener('change', takeMetadataTrackSnapshot);

      this.on('dispose', function () {
        return textTracks.removeEventListener('change', takeMetadataTrackSnapshot);
      });

      var restoreTrackMode = function restoreTrackMode() {
        for (var i = 0; i < metadataTracksPreFullscreenState.length; i++) {
          var storedTrack = metadataTracksPreFullscreenState[i];

          if (storedTrack.track.mode === 'disabled' && storedTrack.track.mode !== storedTrack.storedMode) {
            storedTrack.track.mode = storedTrack.storedMode;
          }
        }
        // we only want this handler to be executed on the first 'change' event
        textTracks.removeEventListener('change', restoreTrackMode);
      };

      // when we enter fullscreen playback, stop updating the snapshot and
      // restore all track modes to their pre-fullscreen state
      this.on('webkitbeginfullscreen', function () {
        textTracks.removeEventListener('change', takeMetadataTrackSnapshot);

        // remove the listener before adding it just in case it wasn't previously removed
        textTracks.removeEventListener('change', restoreTrackMode);
        textTracks.addEventListener('change', restoreTrackMode);
      });

      // start updating the snapshot again after leaving fullscreen
      this.on('webkitendfullscreen', function () {
        // remove the listener before adding it just in case it wasn't previously removed
        textTracks.removeEventListener('change', takeMetadataTrackSnapshot);
        textTracks.addEventListener('change', takeMetadataTrackSnapshot);

        // remove the restoreTrackMode handler in case it wasn't triggered during fullscreen playback
        textTracks.removeEventListener('change', restoreTrackMode);
      });
    };

    /**
     * Attempt to force override of tracks for the given type
     *
     * @param {String} type - Track type to override, possible values include 'Audio',
     * 'Video', and 'Text'.
     * @param {Boolean} override - If set to true native audio/video will be overridden,
     * otherwise native audio/video will potentially be used.
     * @private
     */


    Html5.prototype.overrideNative_ = function overrideNative_(type, override) {
      var _this2 = this;

      // If there is no behavioral change don't add/remove listeners
      if (override !== this['featuresNative' + type + 'Tracks']) {
        return;
      }

      var lowerCaseType = type.toLowerCase();

      if (this[lowerCaseType + 'TracksListeners_']) {
        Object.keys(this[lowerCaseType + 'TracksListeners_']).forEach(function (eventName) {
          var elTracks = _this2.el()[lowerCaseType + 'Tracks'];

          elTracks.removeEventListener(eventName, _this2[lowerCaseType + 'TracksListeners_'][eventName]);
        });
      }

      this['featuresNative' + type + 'Tracks'] = !override;
      this[lowerCaseType + 'TracksListeners_'] = null;

      this.proxyNativeTracksForType_(lowerCaseType);
    };

    /**
     * Attempt to force override of native audio tracks.
     *
     * @param {Boolean} override - If set to true native audio will be overridden,
     * otherwise native audio will potentially be used.
     */


    Html5.prototype.overrideNativeAudioTracks = function overrideNativeAudioTracks(override) {
      this.overrideNative_('Audio', override);
    };

    /**
     * Attempt to force override of native video tracks.
     *
     * @param {Boolean} override - If set to true native video will be overridden,
     * otherwise native video will potentially be used.
     */


    Html5.prototype.overrideNativeVideoTracks = function overrideNativeVideoTracks(override) {
      this.overrideNative_('Video', override);
    };

    /**
     * Proxy native track list events for the given type to our track
     * lists if the browser we are playing in supports that type of track list.
     *
     * @param {string} name - Track type; values include 'audio', 'video', and 'text'
     * @private
     */


    Html5.prototype.proxyNativeTracksForType_ = function proxyNativeTracksForType_(name) {
      var _this3 = this;

      var props = NORMAL[name];
      var elTracks = this.el()[props.getterName];
      var techTracks = this[props.getterName]();

      if (!this['featuresNative' + props.capitalName + 'Tracks'] || !elTracks || !elTracks.addEventListener) {
        return;
      }
      var listeners = {
        change: function change(e) {
          techTracks.trigger({
            type: 'change',
            target: techTracks,
            currentTarget: techTracks,
            srcElement: techTracks
          });
        },
        addtrack: function addtrack(e) {
          techTracks.addTrack(e.track);
        },
        removetrack: function removetrack(e) {
          techTracks.removeTrack(e.track);
        }
      };
      var removeOldTracks = function removeOldTracks() {
        var removeTracks = [];

        for (var i = 0; i < techTracks.length; i++) {
          var found = false;

          for (var j = 0; j < elTracks.length; j++) {
            if (elTracks[j] === techTracks[i]) {
              found = true;
              break;
            }
          }

          if (!found) {
            removeTracks.push(techTracks[i]);
          }
        }

        while (removeTracks.length) {
          techTracks.removeTrack(removeTracks.shift());
        }
      };

      this[props.getterName + 'Listeners_'] = listeners;

      Object.keys(listeners).forEach(function (eventName) {
        var listener = listeners[eventName];

        elTracks.addEventListener(eventName, listener);
        _this3.on('dispose', function (e) {
          return elTracks.removeEventListener(eventName, listener);
        });
      });

      // Remove (native) tracks that are not used anymore
      this.on('loadstart', removeOldTracks);
      this.on('dispose', function (e) {
        return _this3.off('loadstart', removeOldTracks);
      });
    };

    /**
     * Proxy all native track list events to our track lists if the browser we are playing
     * in supports that type of track list.
     *
     * @private
     */


    Html5.prototype.proxyNativeTracks_ = function proxyNativeTracks_() {
      var _this4 = this;

      NORMAL.names.forEach(function (name) {
        _this4.proxyNativeTracksForType_(name);
      });
    };

    /**
     * Create the `Html5` Tech's DOM element.
     *
     * @return {Element}
     *         The element that gets created.
     */


    Html5.prototype.createEl = function createEl$$1() {
      var el = this.options_.tag;

      // Check if this browser supports moving the element into the box.
      // On the iPhone video will break if you move the element,
      // So we have to create a brand new element.
      // If we ingested the player div, we do not need to move the media element.
      if (!el || !(this.options_.playerElIngest || this.movingMediaElementInDOM)) {

        // If the original tag is still there, clone and remove it.
        if (el) {
          var clone = el.cloneNode(true);

          if (el.parentNode) {
            el.parentNode.insertBefore(clone, el);
          }
          Html5.disposeMediaElement(el);
          el = clone;
        } else {
          el = document_1.createElement('video');

          // determine if native controls should be used
          var tagAttributes = this.options_.tag && getAttributes(this.options_.tag);
          var attributes = mergeOptions({}, tagAttributes);

          if (!TOUCH_ENABLED || this.options_.nativeControlsForTouch !== true) {
            delete attributes.controls;
          }

          setAttributes(el, assign(attributes, {
            id: this.options_.techId,
            class: 'vjs-tech'
          }));
        }

        el.playerId = this.options_.playerId;
      }

      if (typeof this.options_.preload !== 'undefined') {
        setAttribute(el, 'preload', this.options_.preload);
      }

      // Update specific tag settings, in case they were overridden
      // `autoplay` has to be *last* so that `muted` and `playsinline` are present
      // when iOS/Safari or other browsers attempt to autoplay.
      var settingsAttrs = ['loop', 'muted', 'playsinline', 'autoplay'];

      for (var i = 0; i < settingsAttrs.length; i++) {
        var attr = settingsAttrs[i];
        var value = this.options_[attr];

        if (typeof value !== 'undefined') {
          if (value) {
            setAttribute(el, attr, attr);
          } else {
            removeAttribute(el, attr);
          }
          el[attr] = value;
        }
      }

      return el;
    };

    /**
     * This will be triggered if the loadstart event has already fired, before videojs was
     * ready. Two known examples of when this can happen are:
     * 1. If we're loading the playback object after it has started loading
     * 2. The media is already playing the (often with autoplay on) then
     *
     * This function will fire another loadstart so that videojs can catchup.
     *
     * @fires Tech#loadstart
     *
     * @return {undefined}
     *         returns nothing.
     */


    Html5.prototype.handleLateInit_ = function handleLateInit_(el) {
      if (el.networkState === 0 || el.networkState === 3) {
        // The video element hasn't started loading the source yet
        // or didn't find a source
        return;
      }

      if (el.readyState === 0) {
        // NetworkState is set synchronously BUT loadstart is fired at the
        // end of the current stack, usually before setInterval(fn, 0).
        // So at this point we know loadstart may have already fired or is
        // about to fire, and either way the player hasn't seen it yet.
        // We don't want to fire loadstart prematurely here and cause a
        // double loadstart so we'll wait and see if it happens between now
        // and the next loop, and fire it if not.
        // HOWEVER, we also want to make sure it fires before loadedmetadata
        // which could also happen between now and the next loop, so we'll
        // watch for that also.
        var loadstartFired = false;
        var setLoadstartFired = function setLoadstartFired() {
          loadstartFired = true;
        };

        this.on('loadstart', setLoadstartFired);

        var triggerLoadstart = function triggerLoadstart() {
          // We did miss the original loadstart. Make sure the player
          // sees loadstart before loadedmetadata
          if (!loadstartFired) {
            this.trigger('loadstart');
          }
        };

        this.on('loadedmetadata', triggerLoadstart);

        this.ready(function () {
          this.off('loadstart', setLoadstartFired);
          this.off('loadedmetadata', triggerLoadstart);

          if (!loadstartFired) {
            // We did miss the original native loadstart. Fire it now.
            this.trigger('loadstart');
          }
        });

        return;
      }

      // From here on we know that loadstart already fired and we missed it.
      // The other readyState events aren't as much of a problem if we double
      // them, so not going to go to as much trouble as loadstart to prevent
      // that unless we find reason to.
      var eventsToTrigger = ['loadstart'];

      // loadedmetadata: newly equal to HAVE_METADATA (1) or greater
      eventsToTrigger.push('loadedmetadata');

      // loadeddata: newly increased to HAVE_CURRENT_DATA (2) or greater
      if (el.readyState >= 2) {
        eventsToTrigger.push('loadeddata');
      }

      // canplay: newly increased to HAVE_FUTURE_DATA (3) or greater
      if (el.readyState >= 3) {
        eventsToTrigger.push('canplay');
      }

      // canplaythrough: newly equal to HAVE_ENOUGH_DATA (4)
      if (el.readyState >= 4) {
        eventsToTrigger.push('canplaythrough');
      }

      // We still need to give the player time to add event listeners
      this.ready(function () {
        eventsToTrigger.forEach(function (type) {
          this.trigger(type);
        }, this);
      });
    };

    /**
     * Set current time for the `HTML5` tech.
     *
     * @param {number} seconds
     *        Set the current time of the media to this.
     */


    Html5.prototype.setCurrentTime = function setCurrentTime(seconds) {
      try {
        this.el_.currentTime = seconds;
      } catch (e) {
        log$1(e, 'Video is not ready. (Video.js)');
        // this.warning(VideoJS.warnings.videoNotReady);
      }
    };

    /**
     * Get the current duration of the HTML5 media element.
     *
     * @return {number}
     *         The duration of the media or 0 if there is no duration.
     */


    Html5.prototype.duration = function duration() {
      var _this5 = this;

      // Android Chrome will report duration as Infinity for VOD HLS until after
      // playback has started, which triggers the live display erroneously.
      // Return NaN if playback has not started and trigger a durationupdate once
      // the duration can be reliably known.
      if (this.el_.duration === Infinity && IS_ANDROID && IS_CHROME && this.el_.currentTime === 0) {
        // Wait for the first `timeupdate` with currentTime > 0 - there may be
        // several with 0
        var checkProgress = function checkProgress() {
          if (_this5.el_.currentTime > 0) {
            // Trigger durationchange for genuinely live video
            if (_this5.el_.duration === Infinity) {
              _this5.trigger('durationchange');
            }
            _this5.off('timeupdate', checkProgress);
          }
        };

        this.on('timeupdate', checkProgress);
        return NaN;
      }
      return this.el_.duration || NaN;
    };

    /**
     * Get the current width of the HTML5 media element.
     *
     * @return {number}
     *         The width of the HTML5 media element.
     */


    Html5.prototype.width = function width() {
      return this.el_.offsetWidth;
    };

    /**
     * Get the current height of the HTML5 media element.
     *
     * @return {number}
     *         The height of the HTML5 media element.
     */


    Html5.prototype.height = function height() {
      return this.el_.offsetHeight;
    };

    /**
     * Proxy iOS `webkitbeginfullscreen` and `webkitendfullscreen` into
     * `fullscreenchange` event.
     *
     * @private
     * @fires fullscreenchange
     * @listens webkitendfullscreen
     * @listens webkitbeginfullscreen
     * @listens webkitbeginfullscreen
     */


    Html5.prototype.proxyWebkitFullscreen_ = function proxyWebkitFullscreen_() {
      var _this6 = this;

      if (!('webkitDisplayingFullscreen' in this.el_)) {
        return;
      }

      var endFn = function endFn() {
        this.trigger('fullscreenchange', {isFullscreen: false});
      };

      var beginFn = function beginFn() {
        if ('webkitPresentationMode' in this.el_ && this.el_.webkitPresentationMode !== 'picture-in-picture') {
          this.one('webkitendfullscreen', endFn);

          this.trigger('fullscreenchange', {isFullscreen: true});
        }
      };

      this.on('webkitbeginfullscreen', beginFn);
      this.on('dispose', function () {
        _this6.off('webkitbeginfullscreen', beginFn);
        _this6.off('webkitendfullscreen', endFn);
      });
    };

    /**
     * Check if fullscreen is supported on the current playback device.
     *
     * @return {boolean}
     *         - True if fullscreen is supported.
     *         - False if fullscreen is not supported.
     */


    Html5.prototype.supportsFullScreen = function supportsFullScreen() {
      if (typeof this.el_.webkitEnterFullScreen === 'function') {
        var userAgent = window_1.navigator && window_1.navigator.userAgent || '';

        // Seems to be broken in Chromium/Chrome && Safari in Leopard
        if (/Android/.test(userAgent) || !/Chrome|Mac OS X 10.5/.test(userAgent)) {
          return true;
        }
      }
      return false;
    };

    /**
     * Request that the `HTML5` Tech enter fullscreen.
     */


    Html5.prototype.enterFullScreen = function enterFullScreen() {
      var video = this.el_;

      if (video.paused && video.networkState <= video.HAVE_METADATA) {
        // attempt to prime the video element for programmatic access
        // this isn't necessary on the desktop but shouldn't hurt
        this.el_.play();

        // playing and pausing synchronously during the transition to fullscreen
        // can get iOS ~6.1 devices into a playOld/pause loop
        this.setTimeout(function () {
          video.pause();
          video.webkitEnterFullScreen();
        }, 0);
      } else {
        video.webkitEnterFullScreen();
      }
    };

    /**
     * Request that the `HTML5` Tech exit fullscreen.
     */


    Html5.prototype.exitFullScreen = function exitFullScreen() {
      this.el_.webkitExitFullScreen();
    };

    /**
     * A getter/setter for the `Html5` Tech's source object.
     * > Note: Please use {@link Html5#setSource}
     *
     * @param {Tech~SourceObject} [src]
     *        The source object you want to set on the `HTML5` techs element.
     *
     * @return {Tech~SourceObject|undefined}
     *         - The current source object when a source is not passed in.
     *         - undefined when setting
     *
     * @deprecated Since version 5.
     */


    Html5.prototype.src = function src(_src) {
      if (_src === undefined) {
        return this.el_.src;
      }

      // Setting src through `src` instead of `setSrc` will be deprecated
      this.setSrc(_src);
    };

    /**
     * Reset the tech by removing all sources and then calling
     * {@link Html5.resetMediaElement}.
     */


    Html5.prototype.reset = function reset() {
      Html5.resetMediaElement(this.el_);
    };

    /**
     * Get the current source on the `HTML5` Tech. Falls back to returning the source from
     * the HTML5 media element.
     *
     * @return {Tech~SourceObject}
     *         The current source object from the HTML5 tech. With a fallback to the
     *         elements source.
     */


    Html5.prototype.currentSrc = function currentSrc() {
      if (this.currentSource_) {
        return this.currentSource_.src;
      }
      return this.el_.currentSrc;
    };

    /**
     * Set controls attribute for the HTML5 media Element.
     *
     * @param {string} val
     *        Value to set the controls attribute to
     */


    Html5.prototype.setControls = function setControls(val) {
      this.el_.controls = !!val;
    };

    /**
     * Create and returns a remote {@link TextTrack} object.
     *
     * @param {string} kind
     *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)
     *
     * @param {string} [label]
     *        Label to identify the text track
     *
     * @param {string} [language]
     *        Two letter language abbreviation
     *
     * @return {TextTrack}
     *         The TextTrack that gets created.
     */


    Html5.prototype.addTextTrack = function addTextTrack(kind, label, language) {
      if (!this.featuresNativeTextTracks) {
        return _Tech.prototype.addTextTrack.call(this, kind, label, language);
      }

      return this.el_.addTextTrack(kind, label, language);
    };

    /**
     * Creates either native TextTrack or an emulated TextTrack depending
     * on the value of `featuresNativeTextTracks`
     *
     * @param {Object} options
     *        The object should contain the options to initialize the TextTrack with.
     *
     * @param {string} [options.kind]
     *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).
     *
     * @param {string} [options.label]
     *        Label to identify the text track
     *
     * @param {string} [options.language]
     *        Two letter language abbreviation.
     *
     * @param {boolean} [options.default]
     *        Default this track to on.
     *
     * @param {string} [options.id]
     *        The internal id to assign this track.
     *
     * @param {string} [options.src]
     *        A source url for the track.
     *
     * @return {HTMLTrackElement}
     *         The track element that gets created.
     */


    Html5.prototype.createRemoteTextTrack = function createRemoteTextTrack(options) {
      if (!this.featuresNativeTextTracks) {
        return _Tech.prototype.createRemoteTextTrack.call(this, options);
      }
      var htmlTrackElement = document_1.createElement('track');

      if (options.kind) {
        htmlTrackElement.kind = options.kind;
      }
      if (options.label) {
        htmlTrackElement.label = options.label;
      }
      if (options.language || options.srclang) {
        htmlTrackElement.srclang = options.language || options.srclang;
      }
      if (options.default) {
        htmlTrackElement.default = options.default;
      }
      if (options.id) {
        htmlTrackElement.id = options.id;
      }
      if (options.src) {
        htmlTrackElement.src = options.src;
      }

      return htmlTrackElement;
    };

    /**
     * Creates a remote text track object and returns an html track element.
     *
     * @param {Object} options The object should contain values for
     * kind, language, label, and src (location of the WebVTT file)
     * @param {Boolean} [manualCleanup=true] if set to false, the TextTrack will be
     * automatically removed from the video element whenever the source changes
     * @return {HTMLTrackElement} An Html Track Element.
     * This can be an emulated {@link HTMLTrackElement} or a native one.
     * @deprecated The default value of the "manualCleanup" parameter will default
     * to "false" in upcoming versions of Video.js
     */


    Html5.prototype.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {
      var htmlTrackElement = _Tech.prototype.addRemoteTextTrack.call(this, options, manualCleanup);

      if (this.featuresNativeTextTracks) {
        this.el().appendChild(htmlTrackElement);
      }

      return htmlTrackElement;
    };

    /**
     * Remove remote `TextTrack` from `TextTrackList` object
     *
     * @param {TextTrack} track
     *        `TextTrack` object to remove
     */


    Html5.prototype.removeRemoteTextTrack = function removeRemoteTextTrack(track) {
      _Tech.prototype.removeRemoteTextTrack.call(this, track);

      if (this.featuresNativeTextTracks) {
        var tracks = this.$$('track');

        var i = tracks.length;

        while (i--) {
          if (track === tracks[i] || track === tracks[i].track) {
            this.el().removeChild(tracks[i]);
          }
        }
      }
    };

    /**
     * Gets available media playback quality metrics as specified by the W3C's Media
     * Playback Quality API.
     *
     * @see [Spec]{@link https://wicg.github.io/media-playback-quality}
     *
     * @return {Object}
     *         An object with supported media playback quality metrics
     */


    Html5.prototype.getVideoPlaybackQuality = function getVideoPlaybackQuality() {
      if (typeof this.el().getVideoPlaybackQuality === 'function') {
        return this.el().getVideoPlaybackQuality();
      }

      var videoPlaybackQuality = {};

      if (typeof this.el().webkitDroppedFrameCount !== 'undefined' && typeof this.el().webkitDecodedFrameCount !== 'undefined') {
        videoPlaybackQuality.droppedVideoFrames = this.el().webkitDroppedFrameCount;
        videoPlaybackQuality.totalVideoFrames = this.el().webkitDecodedFrameCount;
      }

      if (window_1.performance && typeof window_1.performance.now === 'function') {
        videoPlaybackQuality.creationTime = window_1.performance.now();
      } else if (window_1.performance && window_1.performance.timing && typeof window_1.performance.timing.navigationStart === 'number') {
        videoPlaybackQuality.creationTime = window_1.Date.now() - window_1.performance.timing.navigationStart;
      }

      return videoPlaybackQuality;
    };

    return Html5;
  }(Tech);

  /* HTML5 Support Testing ---------------------------------------------------- */

  if (isReal()) {

    /**
     * Element for testing browser HTML5 media capabilities
     *
     * @type {Element}
     * @constant
     * @private
     */
    Html5.TEST_VID = document_1.createElement('video');
    var track = document_1.createElement('track');

    track.kind = 'captions';
    track.srclang = 'en';
    track.label = 'English';
    Html5.TEST_VID.appendChild(track);
  }

  /**
   * Check if HTML5 media is supported by this browser/device.
   *
   * @return {boolean}
   *         - True if HTML5 media is supported.
   *         - False if HTML5 media is not supported.
   */
  Html5.isSupported = function () {
    // IE with no Media Player is a LIAR! (#984)
    try {
      Html5.TEST_VID.volume = 0.5;
    } catch (e) {
      return false;
    }

    return !!(Html5.TEST_VID && Html5.TEST_VID.canPlayType);
  };

  /**
   * Check if the tech can support the given type
   *
   * @param {string} type
   *        The mimetype to check
   * @return {string} 'probably', 'maybe', or '' (empty string)
   */
  Html5.canPlayType = function (type) {
    return Html5.TEST_VID.canPlayType(type);
  };

  /**
   * Check if the tech can support the given source
   * @param {Object} srcObj
   *        The source object
   * @param {Object} options
   *        The options passed to the tech
   * @return {string} 'probably', 'maybe', or '' (empty string)
   */
  Html5.canPlaySource = function (srcObj, options) {
    return Html5.canPlayType(srcObj.type);
  };

  /**
   * Check if the volume can be changed in this browser/device.
   * Volume cannot be changed in a lot of mobile devices.
   * Specifically, it can't be changed from 1 on iOS.
   *
   * @return {boolean}
   *         - True if volume can be controlled
   *         - False otherwise
   */
  Html5.canControlVolume = function () {
    // IE will error if Windows Media Player not installed #3315
    try {
      var volume = Html5.TEST_VID.volume;

      Html5.TEST_VID.volume = volume / 2 + 0.1;
      return volume !== Html5.TEST_VID.volume;
    } catch (e) {
      return false;
    }
  };

  /**
   * Check if the playback rate can be changed in this browser/device.
   *
   * @return {boolean}
   *         - True if playback rate can be controlled
   *         - False otherwise
   */
  Html5.canControlPlaybackRate = function () {
    // Playback rate API is implemented in Android Chrome, but doesn't do anything
    // https://github.com/videojs/video.js/issues/3180
    if (IS_ANDROID && IS_CHROME && CHROME_VERSION < 58) {
      return false;
    }
    // IE will error if Windows Media Player not installed #3315
    try {
      var playbackRate = Html5.TEST_VID.playbackRate;

      Html5.TEST_VID.playbackRate = playbackRate / 2 + 0.1;
      return playbackRate !== Html5.TEST_VID.playbackRate;
    } catch (e) {
      return false;
    }
  };

  /**
   * Check if we can override a video/audio elements attributes, with
   * Object.defineProperty.
   *
   * @return {boolean}
   *         - True if builtin attributes can be overridden
   *         - False otherwise
   */
  Html5.canOverrideAttributes = function () {
    // if we cannot overwrite the src/innerHTML property, there is no support
    // iOS 7 safari for instance cannot do this.
    try {
      var noop = function noop() {
      };

      Object.defineProperty(document_1.createElement('video'), 'src', {get: noop, set: noop});
      Object.defineProperty(document_1.createElement('audio'), 'src', {get: noop, set: noop});
      Object.defineProperty(document_1.createElement('video'), 'innerHTML', {get: noop, set: noop});
      Object.defineProperty(document_1.createElement('audio'), 'innerHTML', {get: noop, set: noop});
    } catch (e) {
      return false;
    }

    return true;
  };

  /**
   * Check to see if native `TextTrack`s are supported by this browser/device.
   *
   * @return {boolean}
   *         - True if native `TextTrack`s are supported.
   *         - False otherwise
   */
  Html5.supportsNativeTextTracks = function () {
    return IS_ANY_SAFARI;
  };

  /**
   * Check to see if native `VideoTrack`s are supported by this browser/device
   *
   * @return {boolean}
   *        - True if native `VideoTrack`s are supported.
   *        - False otherwise
   */
  Html5.supportsNativeVideoTracks = function () {
    return !!(Html5.TEST_VID && Html5.TEST_VID.videoTracks);
  };

  /**
   * Check to see if native `AudioTrack`s are supported by this browser/device
   *
   * @return {boolean}
   *        - True if native `AudioTrack`s are supported.
   *        - False otherwise
   */
  Html5.supportsNativeAudioTracks = function () {
    return !!(Html5.TEST_VID && Html5.TEST_VID.audioTracks);
  };

  /**
   * An array of events available on the Html5 tech.
   *
   * @private
   * @type {Array}
   */
  Html5.Events = ['loadstart', 'suspend', 'abort', 'error', 'emptied', 'stalled', 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough', 'playing', 'waiting', 'seeking', 'seeked', 'ended', 'durationchange', 'timeupdate', 'progress', 'play', 'pause', 'ratechange', 'resize', 'volumechange'];

  /**
   * Boolean indicating whether the `Tech` supports volume control.
   *
   * @type {boolean}
   * @default {@link Html5.canControlVolume}
   */
  Html5.prototype.featuresVolumeControl = Html5.canControlVolume();

  /**
   * Boolean indicating whether the `Tech` supports changing the speed at which the media
   * plays. Examples:
   *   - Set player to playOld 2x (twice) as fast
   *   - Set player to playOld 0.5x (half) as fast
   *
   * @type {boolean}
   * @default {@link Html5.canControlPlaybackRate}
   */
  Html5.prototype.featuresPlaybackRate = Html5.canControlPlaybackRate();

  /**
   * Boolean indicating whether the `Tech` supports the `sourceset` event.
   *
   * @type {boolean}
   * @default
   */
  Html5.prototype.featuresSourceset = Html5.canOverrideAttributes();

  /**
   * Boolean indicating whether the `HTML5` tech currently supports the media element
   * moving in the DOM. iOS breaks if you move the media element, so this is set this to
   * false there. Everywhere else this should be true.
   *
   * @type {boolean}
   * @default
   */
  Html5.prototype.movingMediaElementInDOM = !IS_IOS;

  // TODO: Previous comment: No longer appears to be used. Can probably be removed.
  //       Is this true?
  /**
   * Boolean indicating whether the `HTML5` tech currently supports automatic media resize
   * when going into fullscreen.
   *
   * @type {boolean}
   * @default
   */
  Html5.prototype.featuresFullscreenResize = true;

  /**
   * Boolean indicating whether the `HTML5` tech currently supports the progress event.
   * If this is false, manual `progress` events will be triggered instead.
   *
   * @type {boolean}
   * @default
   */
  Html5.prototype.featuresProgressEvents = true;

  /**
   * Boolean indicating whether the `HTML5` tech currently supports the timeupdate event.
   * If this is false, manual `timeupdate` events will be triggered instead.
   *
   * @default
   */
  Html5.prototype.featuresTimeupdateEvents = true;

  /**
   * Boolean indicating whether the `HTML5` tech currently supports native `TextTrack`s.
   *
   * @type {boolean}
   * @default {@link Html5.supportsNativeTextTracks}
   */
  Html5.prototype.featuresNativeTextTracks = Html5.supportsNativeTextTracks();

  /**
   * Boolean indicating whether the `HTML5` tech currently supports native `VideoTrack`s.
   *
   * @type {boolean}
   * @default {@link Html5.supportsNativeVideoTracks}
   */
  Html5.prototype.featuresNativeVideoTracks = Html5.supportsNativeVideoTracks();

  /**
   * Boolean indicating whether the `HTML5` tech currently supports native `AudioTrack`s.
   *
   * @type {boolean}
   * @default {@link Html5.supportsNativeAudioTracks}
   */
  Html5.prototype.featuresNativeAudioTracks = Html5.supportsNativeAudioTracks();

  // HTML5 Feature detection and Device Fixes --------------------------------- //
  var canPlayType = Html5.TEST_VID && Html5.TEST_VID.constructor.prototype.canPlayType;
  var mpegurlRE = /^application\/(?:x-|vnd\.apple\.)mpegurl/i;

  Html5.patchCanPlayType = function () {

    // Android 4.0 and above can playOld HLS to some extent but it reports being unable to do so
    // Firefox and Chrome report correctly
    if (ANDROID_VERSION >= 4.0 && !IS_FIREFOX && !IS_CHROME) {
      Html5.TEST_VID.constructor.prototype.canPlayType = function (type) {
        if (type && mpegurlRE.test(type)) {
          return 'maybe';
        }
        return canPlayType.call(this, type);
      };
    }
  };

  Html5.unpatchCanPlayType = function () {
    var r = Html5.TEST_VID.constructor.prototype.canPlayType;

    Html5.TEST_VID.constructor.prototype.canPlayType = canPlayType;
    return r;
  };

  // by default, patch the media element
  Html5.patchCanPlayType();

  Html5.disposeMediaElement = function (el) {
    if (!el) {
      return;
    }

    if (el.parentNode) {
      el.parentNode.removeChild(el);
    }

    // remove any child track or source nodes to prevent their loading
    while (el.hasChildNodes()) {
      el.removeChild(el.firstChild);
    }

    // remove any src reference. not setting `src=''` because that causes a warning
    // in firefox
    el.removeAttribute('src');

    // force the media element to update its loading state by calling load()
    // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)
    if (typeof el.load === 'function') {
      // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)
      (function () {
        try {
          el.load();
        } catch (e) {
          // not supported
        }
      })();
    }
  };

  Html5.resetMediaElement = function (el) {
    if (!el) {
      return;
    }

    var sources = el.querySelectorAll('source');
    var i = sources.length;

    while (i--) {
      el.removeChild(sources[i]);
    }

    // remove any src reference.
    // not setting `src=''` because that throws an error
    el.removeAttribute('src');

    if (typeof el.load === 'function') {
      // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)
      (function () {
        try {
          el.load();
        } catch (e) {
          // satisfy linter
        }
      })();
    }
  };

  /* Native HTML5 element property wrapping ----------------------------------- */
  // Wrap native boolean attributes with getters that check both property and attribute
  // The list is as followed:
  // muted, defaultMuted, autoplay, controls, loop, playsinline
  [
    /**
     * Get the value of `muted` from the media element. `muted` indicates
     * that the volume for the media should be set to silent. This does not actually change
     * the `volume` attribute.
     *
     * @method Html5#muted
     * @return {boolean}
     *         - True if the value of `volume` should be ignored and the audio set to silent.
     *         - False if the value of `volume` should be used.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}
     */
    'muted',

    /**
     * Get the value of `defaultMuted` from the media element. `defaultMuted` indicates
     * whether the media should start muted or not. Only changes the default state of the
     * media. `muted` and `defaultMuted` can have different values. {@link Html5#muted} indicates the
     * current state.
     *
     * @method Html5#defaultMuted
     * @return {boolean}
     *         - The value of `defaultMuted` from the media element.
     *         - True indicates that the media should start muted.
     *         - False indicates that the media should not start muted
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}
     */
    'defaultMuted',

    /**
     * Get the value of `autoplay` from the media element. `autoplay` indicates
     * that the media should start to playOld as soon as the page is ready.
     *
     * @method Html5#autoplay
     * @return {boolean}
     *         - The value of `autoplay` from the media element.
     *         - True indicates that the media should start as soon as the page loads.
     *         - False indicates that the media should not start as soon as the page loads.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}
     */
    'autoplay',

    /**
     * Get the value of `controls` from the media element. `controls` indicates
     * whether the native media controls should be shown or hidden.
     *
     * @method Html5#controls
     * @return {boolean}
     *         - The value of `controls` from the media element.
     *         - True indicates that native controls should be showing.
     *         - False indicates that native controls should be hidden.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-controls}
     */
    'controls',

    /**
     * Get the value of `loop` from the media element. `loop` indicates
     * that the media should return to the start of the media and continue playing once
     * it reaches the end.
     *
     * @method Html5#loop
     * @return {boolean}
     *         - The value of `loop` from the media element.
     *         - True indicates that playback should seek back to start once
     *           the end of a media is reached.
     *         - False indicates that playback should not loop back to the start when the
     *           end of the media is reached.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}
     */
    'loop',

    /**
     * Get the value of `playsinline` from the media element. `playsinline` indicates
     * to the browser that non-fullscreen playback is preferred when fullscreen
     * playback is the native default, such as in iOS Safari.
     *
     * @method Html5#playsinline
     * @return {boolean}
     *         - The value of `playsinline` from the media element.
     *         - True indicates that the media should playOld inline.
     *         - False indicates that the media should not playOld inline.
     *
     * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}
     */
    'playsinline'].forEach(function (prop) {
    Html5.prototype[prop] = function () {
      return this.el_[prop] || this.el_.hasAttribute(prop);
    };
  });

  // Wrap native boolean attributes with setters that set both property and attribute
  // The list is as followed:
  // setMuted, setDefaultMuted, setAutoplay, setLoop, setPlaysinline
  // setControls is special-cased above
  [
    /**
     * Set the value of `muted` on the media element. `muted` indicates that the current
     * audio level should be silent.
     *
     * @method Html5#setMuted
     * @param {boolean} muted
     *        - True if the audio should be set to silent
     *        - False otherwise
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}
     */
    'muted',

    /**
     * Set the value of `defaultMuted` on the media element. `defaultMuted` indicates that the current
     * audio level should be silent, but will only effect the muted level on intial playback..
     *
     * @method Html5.prototype.setDefaultMuted
     * @param {boolean} defaultMuted
     *        - True if the audio should be set to silent
     *        - False otherwise
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}
     */
    'defaultMuted',

    /**
     * Set the value of `autoplay` on the media element. `autoplay` indicates
     * that the media should start to playOld as soon as the page is ready.
     *
     * @method Html5#setAutoplay
     * @param {boolean} autoplay
     *         - True indicates that the media should start as soon as the page loads.
     *         - False indicates that the media should not start as soon as the page loads.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}
     */
    'autoplay',

    /**
     * Set the value of `loop` on the media element. `loop` indicates
     * that the media should return to the start of the media and continue playing once
     * it reaches the end.
     *
     * @method Html5#setLoop
     * @param {boolean} loop
     *         - True indicates that playback should seek back to start once
     *           the end of a media is reached.
     *         - False indicates that playback should not loop back to the start when the
     *           end of the media is reached.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}
     */
    'loop',

    /**
     * Set the value of `playsinline` from the media element. `playsinline` indicates
     * to the browser that non-fullscreen playback is preferred when fullscreen
     * playback is the native default, such as in iOS Safari.
     *
     * @method Html5#setPlaysinline
     * @param {boolean} playsinline
     *         - True indicates that the media should playOld inline.
     *         - False indicates that the media should not playOld inline.
     *
     * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}
     */
    'playsinline'].forEach(function (prop) {
    Html5.prototype['set' + toTitleCase(prop)] = function (v) {
      this.el_[prop] = v;

      if (v) {
        this.el_.setAttribute(prop, prop);
      } else {
        this.el_.removeAttribute(prop);
      }
    };
  });

  // Wrap native properties with a getter
  // The list is as followed
  // paused, currentTime, buffered, volume, poster, preload, error, seeking
  // seekable, ended, playbackRate, defaultPlaybackRate, played, networkState
  // readyState, videoWidth, videoHeight
  [
    /**
     * Get the value of `paused` from the media element. `paused` indicates whether the media element
     * is currently paused or not.
     *
     * @method Html5#paused
     * @return {boolean}
     *         The value of `paused` from the media element.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-paused}
     */
    'paused',

    /**
     * Get the value of `currentTime` from the media element. `currentTime` indicates
     * the current second that the media is at in playback.
     *
     * @method Html5#currentTime
     * @return {number}
     *         The value of `currentTime` from the media element.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-currenttime}
     */
    'currentTime',

    /**
     * Get the value of `buffered` from the media element. `buffered` is a `TimeRange`
     * object that represents the parts of the media that are already downloaded and
     * available for playback.
     *
     * @method Html5#buffered
     * @return {TimeRange}
     *         The value of `buffered` from the media element.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-buffered}
     */
    'buffered',

    /**
     * Get the value of `volume` from the media element. `volume` indicates
     * the current playback volume of audio for a media. `volume` will be a value from 0
     * (silent) to 1 (loudest and default).
     *
     * @method Html5#volume
     * @return {number}
     *         The value of `volume` from the media element. Value will be between 0-1.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}
     */
    'volume',

    /**
     * Get the value of `poster` from the media element. `poster` indicates
     * that the url of an image file that can/will be shown when no media data is available.
     *
     * @method Html5#poster
     * @return {string}
     *         The value of `poster` from the media element. Value will be a url to an
     *         image.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-video-poster}
     */
    'poster',

    /**
     * Get the value of `preload` from the media element. `preload` indicates
     * what should download before the media is interacted with. It can have the following
     * values:
     * - none: nothing should be downloaded
     * - metadata: poster and the first few frames of the media may be downloaded to get
     *   media dimensions and other metadata
     * - auto: allow the media and metadata for the media to be downloaded before
     *    interaction
     *
     * @method Html5#preload
     * @return {string}
     *         The value of `preload` from the media element. Will be 'none', 'metadata',
     *         or 'auto'.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}
     */
    'preload',

    /**
     * Get the value of the `error` from the media element. `error` indicates any
     * MediaError that may have occurred during playback. If error returns null there is no
     * current error.
     *
     * @method Html5#error
     * @return {MediaError|null}
     *         The value of `error` from the media element. Will be `MediaError` if there
     *         is a current error and null otherwise.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-error}
     */
    'error',

    /**
     * Get the value of `seeking` from the media element. `seeking` indicates whether the
     * media is currently seeking to a new position or not.
     *
     * @method Html5#seeking
     * @return {boolean}
     *         - The value of `seeking` from the media element.
     *         - True indicates that the media is currently seeking to a new position.
     *         - False indicates that the media is not seeking to a new position at this time.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seeking}
     */
    'seeking',

    /**
     * Get the value of `seekable` from the media element. `seekable` returns a
     * `TimeRange` object indicating ranges of time that can currently be `seeked` to.
     *
     * @method Html5#seekable
     * @return {TimeRange}
     *         The value of `seekable` from the media element. A `TimeRange` object
     *         indicating the current ranges of time that can be seeked to.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seekable}
     */
    'seekable',

    /**
     * Get the value of `ended` from the media element. `ended` indicates whether
     * the media has reached the end or not.
     *
     * @method Html5#ended
     * @return {boolean}
     *         - The value of `ended` from the media element.
     *         - True indicates that the media has ended.
     *         - False indicates that the media has not ended.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-ended}
     */
    'ended',

    /**
     * Get the value of `playbackRate` from the media element. `playbackRate` indicates
     * the rate at which the media is currently playing back. Examples:
     *   - if playbackRate is set to 2, media will playOld twice as fast.
     *   - if playbackRate is set to 0.5, media will playOld half as fast.
     *
     * @method Html5#playbackRate
     * @return {number}
     *         The value of `playbackRate` from the media element. A number indicating
     *         the current playback speed of the media, where 1 is normal speed.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}
     */
    'playbackRate',

    /**
     * Get the value of `defaultPlaybackRate` from the media element. `defaultPlaybackRate` indicates
     * the rate at which the media is currently playing back. This value will not indicate the current
     * `playbackRate` after playback has started, use {@link Html5#playbackRate} for that.
     *
     * Examples:
     *   - if defaultPlaybackRate is set to 2, media will playOld twice as fast.
     *   - if defaultPlaybackRate is set to 0.5, media will playOld half as fast.
     *
     * @method Html5.prototype.defaultPlaybackRate
     * @return {number}
     *         The value of `defaultPlaybackRate` from the media element. A number indicating
     *         the current playback speed of the media, where 1 is normal speed.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}
     */
    'defaultPlaybackRate',

    /**
     * Get the value of `played` from the media element. `played` returns a `TimeRange`
     * object representing points in the media timeline that have been played.
     *
     * @method Html5#played
     * @return {TimeRange}
     *         The value of `played` from the media element. A `TimeRange` object indicating
     *         the ranges of time that have been played.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-played}
     */
    'played',

    /**
     * Get the value of `networkState` from the media element. `networkState` indicates
     * the current network state. It returns an enumeration from the following list:
     * - 0: NETWORK_EMPTY
     * - 1: NETWORK_IDLE
     * - 2: NETWORK_LOADING
     * - 3: NETWORK_NO_SOURCE
     *
     * @method Html5#networkState
     * @return {number}
     *         The value of `networkState` from the media element. This will be a number
     *         from the list in the description.
     *
     * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-networkstate}
     */
    'networkState',

    /**
     * Get the value of `readyState` from the media element. `readyState` indicates
     * the current state of the media element. It returns an enumeration from the
     * following list:
     * - 0: HAVE_NOTHING
     * - 1: HAVE_METADATA
     * - 2: HAVE_CURRENT_DATA
     * - 3: HAVE_FUTURE_DATA
     * - 4: HAVE_ENOUGH_DATA
     *
     * @method Html5#readyState
     * @return {number}
     *         The value of `readyState` from the media element. This will be a number
     *         from the list in the description.
     *
     * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#ready-states}
     */
    'readyState',

    /**
     * Get the value of `videoWidth` from the video element. `videoWidth` indicates
     * the current width of the video in css pixels.
     *
     * @method Html5#videoWidth
     * @return {number}
     *         The value of `videoWidth` from the video element. This will be a number
     *         in css pixels.
     *
     * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}
     */
    'videoWidth',

    /**
     * Get the value of `videoHeight` from the video element. `videoHeight` indicates
     * the current height of the video in css pixels.
     *
     * @method Html5#videoHeight
     * @return {number}
     *         The value of `videoHeight` from the video element. This will be a number
     *         in css pixels.
     *
     * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}
     */
    'videoHeight'].forEach(function (prop) {
    Html5.prototype[prop] = function () {
      return this.el_[prop];
    };
  });

  // Wrap native properties with a setter in this format:
  // set + toTitleCase(name)
  // The list is as follows:
  // setVolume, setSrc, setPoster, setPreload, setPlaybackRate, setDefaultPlaybackRate
  [
    /**
     * Set the value of `volume` on the media element. `volume` indicates the current
     * audio level as a percentage in decimal form. This means that 1 is 100%, 0.5 is 50%, and
     * so on.
     *
     * @method Html5#setVolume
     * @param {number} percentAsDecimal
     *        The volume percent as a decimal. Valid range is from 0-1.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}
     */
    'volume',

    /**
     * Set the value of `src` on the media element. `src` indicates the current
     * {@link Tech~SourceObject} for the media.
     *
     * @method Html5#setSrc
     * @param {Tech~SourceObject} src
     *        The source object to set as the current source.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-src}
     */
    'src',

    /**
     * Set the value of `poster` on the media element. `poster` is the url to
     * an image file that can/will be shown when no media data is available.
     *
     * @method Html5#setPoster
     * @param {string} poster
     *        The url to an image that should be used as the `poster` for the media
     *        element.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-poster}
     */
    'poster',

    /**
     * Set the value of `preload` on the media element. `preload` indicates
     * what should download before the media is interacted with. It can have the following
     * values:
     * - none: nothing should be downloaded
     * - metadata: poster and the first few frames of the media may be downloaded to get
     *   media dimensions and other metadata
     * - auto: allow the media and metadata for the media to be downloaded before
     *    interaction
     *
     * @method Html5#setPreload
     * @param {string} preload
     *         The value of `preload` to set on the media element. Must be 'none', 'metadata',
     *         or 'auto'.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}
     */
    'preload',

    /**
     * Set the value of `playbackRate` on the media element. `playbackRate` indicates
     * the rate at which the media should playOld back. Examples:
     *   - if playbackRate is set to 2, media will playOld twice as fast.
     *   - if playbackRate is set to 0.5, media will playOld half as fast.
     *
     * @method Html5#setPlaybackRate
     * @return {number}
     *         The value of `playbackRate` from the media element. A number indicating
     *         the current playback speed of the media, where 1 is normal speed.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}
     */
    'playbackRate',

    /**
     * Set the value of `defaultPlaybackRate` on the media element. `defaultPlaybackRate` indicates
     * the rate at which the media should playOld back upon initial startup. Changing this value
     * after a video has started will do nothing. Instead you should used {@link Html5#setPlaybackRate}.
     *
     * Example Values:
     *   - if playbackRate is set to 2, media will playOld twice as fast.
     *   - if playbackRate is set to 0.5, media will playOld half as fast.
     *
     * @method Html5.prototype.setDefaultPlaybackRate
     * @return {number}
     *         The value of `defaultPlaybackRate` from the media element. A number indicating
     *         the current playback speed of the media, where 1 is normal speed.
     *
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultplaybackrate}
     */
    'defaultPlaybackRate'].forEach(function (prop) {
    Html5.prototype['set' + toTitleCase(prop)] = function (v) {
      this.el_[prop] = v;
    };
  });

  // wrap native functions with a function
  // The list is as follows:
  // pause, load, playOld
  [
    /**
     * A wrapper around the media elements `pause` function. This will call the `HTML5`
     * media elements `pause` function.
     *
     * @method Html5#pause
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-pause}
     */
    'pause',

    /**
     * A wrapper around the media elements `load` function. This will call the `HTML5`s
     * media element `load` function.
     *
     * @method Html5#load
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-load}
     */
    'load',

    /**
     * A wrapper around the media elements `playOld` function. This will call the `HTML5`s
     * media element `playOld` function.
     *
     * @method Html5#playOld
     * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-play}
     */
    'play'].forEach(function (prop) {
    Html5.prototype[prop] = function () {
      return this.el_[prop]();
    };
  });

  Tech.withSourceHandlers(Html5);

  /**
   * Native source handler for Html5, simply passes the source to the media element.
   *
   * @property {Tech~SourceObject} source
   *        The source object
   *
   * @property {Html5} tech
   *        The instance of the HTML5 tech.
   */
  Html5.nativeSourceHandler = {};

  /**
   * Check if the media element can playOld the given mime type.
   *
   * @param {string} type
   *        The mimetype to check
   *
   * @return {string}
   *         'probably', 'maybe', or '' (empty string)
   */
  Html5.nativeSourceHandler.canPlayType = function (type) {
    // IE without MediaPlayer throws an error (#519)
    try {
      return Html5.TEST_VID.canPlayType(type);
    } catch (e) {
      return '';
    }
  };

  /**
   * Check if the media element can handle a source natively.
   *
   * @param {Tech~SourceObject} source
   *         The source object
   *
   * @param {Object} [options]
   *         Options to be passed to the tech.
   *
   * @return {string}
   *         'probably', 'maybe', or '' (empty string).
   */
  Html5.nativeSourceHandler.canHandleSource = function (source, options) {

    // If a type was provided we should rely on that
    if (source.type) {
      return Html5.nativeSourceHandler.canPlayType(source.type);

      // If no type, fall back to checking 'video/[EXTENSION]'
    } else if (source.src) {
      var ext = getFileExtension(source.src);

      return Html5.nativeSourceHandler.canPlayType('video/' + ext);
    }

    return '';
  };

  /**
   * Pass the source to the native media element.
   *
   * @param {Tech~SourceObject} source
   *        The source object
   *
   * @param {Html5} tech
   *        The instance of the Html5 tech
   *
   * @param {Object} [options]
   *        The options to pass to the source
   */
  Html5.nativeSourceHandler.handleSource = function (source, tech, options) {
    tech.setSrc(source.src);
  };

  /**
   * A noop for the native dispose function, as cleanup is not needed.
   */
  Html5.nativeSourceHandler.dispose = function () {
  };

  // Register the native source handler
  Html5.registerSourceHandler(Html5.nativeSourceHandler);

  Tech.registerTech('Html5', Html5);

  var _templateObject$2 = taggedTemplateLiteralLoose(['\n        Using the tech directly can be dangerous. I hope you know what you\'re doing.\n        See https://github.com/videojs/video.js/issues/2617 for more info.\n      '], ['\n        Using the tech directly can be dangerous. I hope you know what you\'re doing.\n        See https://github.com/videojs/video.js/issues/2617 for more info.\n      ']);

  // The following tech events are simply re-triggered
  // on the player when they happen
  var TECH_EVENTS_RETRIGGER = [
    /**
     * Fired while the user agent is downloading media data.
     *
     * @event Player#progress
     * @type {EventTarget~Event}
     */
    /**
     * Retrigger the `progress` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechProgress_
     * @fires Player#progress
     * @listens Tech#progress
     */
    'progress',

    /**
     * Fires when the loading of an audio/video is aborted.
     *
     * @event Player#abort
     * @type {EventTarget~Event}
     */
    /**
     * Retrigger the `abort` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechAbort_
     * @fires Player#abort
     * @listens Tech#abort
     */
    'abort',

    /**
     * Fires when the browser is intentionally not getting media data.
     *
     * @event Player#suspend
     * @type {EventTarget~Event}
     */
    /**
     * Retrigger the `suspend` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechSuspend_
     * @fires Player#suspend
     * @listens Tech#suspend
     */
    'suspend',

    /**
     * Fires when the current playlist is empty.
     *
     * @event Player#emptied
     * @type {EventTarget~Event}
     */
    /**
     * Retrigger the `emptied` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechEmptied_
     * @fires Player#emptied
     * @listens Tech#emptied
     */
    'emptied',
    /**
     * Fires when the browser is trying to get media data, but data is not available.
     *
     * @event Player#stalled
     * @type {EventTarget~Event}
     */
    /**
     * Retrigger the `stalled` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechStalled_
     * @fires Player#stalled
     * @listens Tech#stalled
     */
    'stalled',

    /**
     * Fires when the browser has loaded meta data for the audio/video.
     *
     * @event Player#loadedmetadata
     * @type {EventTarget~Event}
     */
    /**
     * Retrigger the `stalled` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechLoadedmetadata_
     * @fires Player#loadedmetadata
     * @listens Tech#loadedmetadata
     */
    'loadedmetadata',

    /**
     * Fires when the browser has loaded the current frame of the audio/video.
     *
     * @event Player#loadeddata
     * @type {event}
     */
    /**
     * Retrigger the `loadeddata` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechLoaddeddata_
     * @fires Player#loadeddata
     * @listens Tech#loadeddata
     */
    'loadeddata',

    /**
     * Fires when the current playback position has changed.
     *
     * @event Player#timeupdate
     * @type {event}
     */
    /**
     * Retrigger the `timeupdate` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechTimeUpdate_
     * @fires Player#timeupdate
     * @listens Tech#timeupdate
     */
    'timeupdate',

    /**
     * Fires when the video's intrinsic dimensions change
     *
     * @event Player#resize
     * @type {event}
     */
    /**
     * Retrigger the `resize` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechResize_
     * @fires Player#resize
     * @listens Tech#resize
     */
    'resize',

    /**
     * Fires when the volume has been changed
     *
     * @event Player#volumechange
     * @type {event}
     */
    /**
     * Retrigger the `volumechange` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechVolumechange_
     * @fires Player#volumechange
     * @listens Tech#volumechange
     */
    'volumechange',

    /**
     * Fires when the text track has been changed
     *
     * @event Player#texttrackchange
     * @type {event}
     */
    /**
     * Retrigger the `texttrackchange` event that was triggered by the {@link Tech}.
     *
     * @private
     * @method Player#handleTechTexttrackchange_
     * @fires Player#texttrackchange
     * @listens Tech#texttrackchange
     */
    'texttrackchange'];

  // events to queue when playback rate is zero
  // this is a hash for the sole purpose of mapping non-camel-cased event names
  // to camel-cased function names
  var TECH_EVENTS_QUEUE = {
    canplay: 'CanPlay',
    canplaythrough: 'CanPlayThrough',
    playing: 'Playing',
    seeked: 'Seeked'
  };

  /**
   * An instance of the `Player` class is created when any of the Video.js setup methods
   * are used to initialize a video.
   *
   * After an instance has been created it can be accessed globally in two ways:
   * 1. By calling `videojs('example_video_1');`
   * 2. By using it directly via  `videojs.players.example_video_1;`
   *
   * @extends Component
   */

  var Player = function (_Component) {
    inherits(Player, _Component);

    /**
     * Create an instance of this class.
     *
     * @param {Element} tag
     *        The original video DOM element used for configuring options.
     *
     * @param {Object} [options]
     *        Object of option names and values.
     *
     * @param {Component~ReadyCallback} [ready]
     *        Ready callback function.
     */
    function Player(tag, options, ready) {
      classCallCheck(this, Player);

      // Make sure tag ID exists
      tag.id = tag.id || options.id || 'vjs_video_' + newGUID();

      // Set Options
      // The options argument overrides options set in the video tag
      // which overrides globally set options.
      // This latter part coincides with the load order
      // (tag must exist before Player)
      options = assign(Player.getTagSettings(tag), options);

      // Delay the initialization of children because we need to set up
      // player properties first, and can't use `this` before `super()`
      options.initChildren = false;

      // Same with creating the element
      options.createEl = false;

      // don't auto mixin the evented mixin
      options.evented = false;

      // we don't want the player to report touch activity on itself
      // see enableTouchActivity in Component
      options.reportTouchActivity = false;

      // If language is not set, get the closest lang attribute
      if (!options.language) {
        if (typeof tag.closest === 'function') {
          var closest = tag.closest('[lang]');

          if (closest && closest.getAttribute) {
            options.language = closest.getAttribute('lang');
          }
        } else {
          var element = tag;

          while (element && element.nodeType === 1) {
            if (getAttributes(element).hasOwnProperty('lang')) {
              options.language = element.getAttribute('lang');
              break;
            }
            element = element.parentNode;
          }
        }
      }

      // Run base component initializing with new options

      // Tracks when a tech changes the poster
      var _this = possibleConstructorReturn(this, _Component.call(this, null, options, ready));

      _this.isPosterFromTech_ = false;

      // Holds callback info that gets queued when playback rate is zero
      // and a seek is happening
      _this.queuedCallbacks_ = [];

      // Turn off API access because we're loading a new tech that might load asynchronously
      _this.isReady_ = false;

      // Init state hasStarted_
      _this.hasStarted_ = false;

      // Init state userActive_
      _this.userActive_ = false;

      // if the global option object was accidentally blown away by
      // someone, bail early with an informative error
      if (!_this.options_ || !_this.options_.techOrder || !_this.options_.techOrder.length) {
        throw new Error('No techOrder specified. Did you overwrite ' + 'videojs.options instead of just changing the ' + 'properties you want to override?');
      }

      // Store the original tag used to set options
      _this.tag = tag;

      // Store the tag attributes used to restore html5 element
      _this.tagAttributes = tag && getAttributes(tag);

      // Update current language
      _this.language(_this.options_.language);

      // Update Supported Languages
      if (options.languages) {
        // Normalise player option languages to lowercase
        var languagesToLower = {};

        Object.getOwnPropertyNames(options.languages).forEach(function (name$$1) {
          languagesToLower[name$$1.toLowerCase()] = options.languages[name$$1];
        });
        _this.languages_ = languagesToLower;
      } else {
        _this.languages_ = Player.prototype.options_.languages;
      }

      // Cache for video property values.
      _this.cache_ = {};

      // Set poster
      _this.poster_ = options.poster || '';

      // Set controls
      _this.controls_ = !!options.controls;

      // Set default values for lastVolume
      _this.cache_.lastVolume = 1;

      // Original tag settings stored in options
      // now remove immediately so native controls don't flash.
      // May be turned back on by HTML5 tech if nativeControlsForTouch is true
      tag.controls = false;
      tag.removeAttribute('controls');

      /*
       * Store the internal state of scrubbing
       *
       * @private
       * @return {Boolean} True if the user is scrubbing
       */
      _this.scrubbing_ = false;

      _this.el_ = _this.createEl();

      // Set default value for lastPlaybackRate
      _this.cache_.lastPlaybackRate = _this.defaultPlaybackRate();

      // Make this an evented object and use `el_` as its event bus.
      evented(_this, {eventBusKey: 'el_'});

      // We also want to pass the original player options to each component and plugin
      // as well so they don't need to reach back into the player for options later.
      // We also need to do another copy of this.options_ so we don't end up with
      // an infinite loop.
      var playerOptionsCopy = mergeOptions(_this.options_);

      // Load plugins
      if (options.plugins) {
        var plugins = options.plugins;

        Object.keys(plugins).forEach(function (name$$1) {
          if (typeof this[name$$1] === 'function') {
            this[name$$1](plugins[name$$1]);
          } else {
            throw new Error('plugin "' + name$$1 + '" does not exist');
          }
        }, _this);
      }

      _this.options_.playerOptions = playerOptionsCopy;

      _this.middleware_ = [];

      _this.initChildren();

      // Set isAudio based on whether or not an audio tag was used
      _this.isAudio(tag.nodeName.toLowerCase() === 'audio');

      // Update controls className. Can't do this when the controls are initially
      // set because the element doesn't exist yet.
      if (_this.controls()) {
        _this.addClass('vjs-controls-enabled');
      } else {
        _this.addClass('vjs-controls-disabled');
      }

      // Set ARIA label and region role depending on player type
      _this.el_.setAttribute('role', 'region');
      if (_this.isAudio()) {
        _this.el_.setAttribute('aria-label', _this.localize('Audio Player'));
      } else {
        _this.el_.setAttribute('aria-label', _this.localize('Video Player'));
      }

      if (_this.isAudio()) {
        _this.addClass('vjs-audio');
      }

      if (_this.flexNotSupported_()) {
        _this.addClass('vjs-no-flex');
      }

      // TODO: Make this smarter. Toggle user state between touching/mousing
      // using events, since devices can have both touch and mouse events.
      // if (browser.TOUCH_ENABLED) {
      //   this.addClass('vjs-touch-enabled');
      // }

      // iOS Safari has broken hover handling
      if (!IS_IOS) {
        _this.addClass('vjs-workinghover');
      }

      // Make player easily findable by ID
      Player.players[_this.id_] = _this;

      // Add a major version class to aid css in plugins
      var majorVersion = version.split('.')[0];

      _this.addClass('vjs-v' + majorVersion);

      // When the player is first initialized, trigger activity so components
      // like the control bar show themselves if needed
      _this.userActive(true);
      _this.reportUserActivity();

      _this.one('play', _this.listenForUserActivity_);
      _this.on('fullscreenchange', _this.handleFullscreenChange_);
      _this.on('stageclick', _this.handleStageClick_);

      _this.changingSrc_ = false;
      _this.playWaitingForReady_ = false;
      _this.playOnLoadstart_ = null;
      return _this;
    }

    /**
     * Destroys the video player and does any necessary cleanup.
     *
     * This is especially helpful if you are dynamically adding and removing videos
     * to/from the DOM.
     *
     * @fires Player#dispose
     */


    Player.prototype.dispose = function dispose() {
      /**
       * Called when the player is being disposed of.
       *
       * @event Player#dispose
       * @type {EventTarget~Event}
       */
      this.trigger('dispose');
      // prevent dispose from being called twice
      this.off('dispose');

      if (this.styleEl_ && this.styleEl_.parentNode) {
        this.styleEl_.parentNode.removeChild(this.styleEl_);
        this.styleEl_ = null;
      }

      // Kill reference to this player
      Player.players[this.id_] = null;

      if (this.tag && this.tag.player) {
        this.tag.player = null;
      }

      if (this.el_ && this.el_.player) {
        this.el_.player = null;
      }

      if (this.tech_) {
        this.tech_.dispose();
        this.isPosterFromTech_ = false;
        this.poster_ = '';
      }

      if (this.playerElIngest_) {
        this.playerElIngest_ = null;
      }

      if (this.tag) {
        this.tag = null;
      }

      clearCacheForPlayer(this);

      // the actual .el_ is removed here
      _Component.prototype.dispose.call(this);
    };

    /**
     * Create the `Player`'s DOM element.
     *
     * @return {Element}
     *         The DOM element that gets created.
     */


    Player.prototype.createEl = function createEl$$1() {
      var tag = this.tag;
      var el = void 0;
      var playerElIngest = this.playerElIngest_ = tag.parentNode && tag.parentNode.hasAttribute && tag.parentNode.hasAttribute('data-vjs-player');
      var divEmbed = this.tag.tagName.toLowerCase() === 'video-js';

      if (playerElIngest) {
        el = this.el_ = tag.parentNode;
      } else if (!divEmbed) {
        el = this.el_ = _Component.prototype.createEl.call(this, 'div');
      }

      // Copy over all the attributes from the tag, including ID and class
      // ID will now reference player box, not the video tag
      var attrs = getAttributes(tag);

      if (divEmbed) {
        el = this.el_ = tag;
        tag = this.tag = document_1.createElement('video');
        while (el.children.length) {
          tag.appendChild(el.firstChild);
        }

        if (!hasClass(el, 'video-js')) {
          addClass(el, 'video-js');
        }

        el.appendChild(tag);

        playerElIngest = this.playerElIngest_ = el;
        // move properties over from our custom `video-js` element
        // to our new `video` element. This will move things like
        // `src` or `controls` that were set via js before the player
        // was initialized.
        Object.keys(el).forEach(function (k) {
          tag[k] = el[k];
        });
      }

      // set tabindex to -1 so we could focus on the player element
      tag.setAttribute('tabindex', '-1');

      // Remove width/height attrs from tag so CSS can make it 100% width/height
      tag.removeAttribute('width');
      tag.removeAttribute('height');

      Object.getOwnPropertyNames(attrs).forEach(function (attr) {
        el.setAttribute(attr, attrs[attr]);

        if (divEmbed) {
          tag.setAttribute(attr, attrs[attr]);
        }
      });

      // Update tag id/class for use as HTML5 playback tech
      // Might think we should do this after embedding in container so .vjs-tech class
      // doesn't flash 100% width/height, but class only applies with .video-js parent
      tag.playerId = tag.id;
      tag.id += '_html5_api';
      tag.className = 'vjs-tech';

      // Make player findable on elements
      tag.player = el.player = this;
      // Default state of video is paused
      this.addClass('vjs-paused');

      // Add a style element in the player that we'll use to set the width/height
      // of the player in a way that's still overrideable by CSS, just like the
      // video element
      if (window_1.VIDEOJS_NO_DYNAMIC_STYLE !== true) {
        this.styleEl_ = createStyleElement('vjs-styles-dimensions');
        var defaultsStyleEl = $('.vjs-styles-defaults');
        var head = $('head');

        head.insertBefore(this.styleEl_, defaultsStyleEl ? defaultsStyleEl.nextSibling : head.firstChild);
      }

      // Pass in the width/height/aspectRatio options which will update the style el
      this.width(this.options_.width);
      this.height(this.options_.height);
      this.fluid(this.options_.fluid);
      this.aspectRatio(this.options_.aspectRatio);

      // Hide any links within the video/audio tag,
      // because IE doesn't hide them completely from screen readers.
      var links = tag.getElementsByTagName('a');

      for (var i = 0; i < links.length; i++) {
        var linkEl = links.item(i);

        addClass(linkEl, 'vjs-hidden');
        linkEl.setAttribute('hidden', 'hidden');
      }

      // insertElFirst seems to cause the networkState to flicker from 3 to 2, so
      // keep track of the original for later so we can know if the source originally failed
      tag.initNetworkState_ = tag.networkState;

      // Wrap video tag in div (el/box) container
      if (tag.parentNode && !playerElIngest) {
        tag.parentNode.insertBefore(el, tag);
      }

      // insert the tag as the first child of the player element
      // then manually add it to the children array so that this.addChild
      // will work properly for other components
      //
      // Breaks iPhone, fixed in HTML5 setup.
      prependTo(tag, el);
      this.children_.unshift(tag);

      // Set lang attr on player to ensure CSS :lang() in consistent with player
      // if it's been set to something different to the doc
      this.el_.setAttribute('lang', this.language_);

      this.el_ = el;

      return el;
    };

    /**
     * A getter/setter for the `Player`'s width. Returns the player's configured value.
     * To get the current width use `currentWidth()`.
     *
     * @param {number} [value]
     *        The value to set the `Player`'s width to.
     *
     * @return {number}
     *         The current width of the `Player` when getting.
     */


    Player.prototype.width = function width(value) {
      return this.dimension('width', value);
    };

    /**
     * A getter/setter for the `Player`'s height. Returns the player's configured value.
     * To get the current height use `currentheight()`.
     *
     * @param {number} [value]
     *        The value to set the `Player`'s heigth to.
     *
     * @return {number}
     *         The current height of the `Player` when getting.
     */


    Player.prototype.height = function height(value) {
      return this.dimension('height', value);
    };

    /**
     * A getter/setter for the `Player`'s width & height.
     *
     * @param {string} dimension
     *        This string can be:
     *        - 'width'
     *        - 'height'
     *
     * @param {number} [value]
     *        Value for dimension specified in the first argument.
     *
     * @return {number}
     *         The dimension arguments value when getting (width/height).
     */


    Player.prototype.dimension = function dimension(_dimension, value) {
      var privDimension = _dimension + '_';

      if (value === undefined) {
        return this[privDimension] || 0;
      }

      if (value === '') {
        // If an empty string is given, reset the dimension to be automatic
        this[privDimension] = undefined;
        this.updateStyleEl_();
        return;
      }

      var parsedVal = parseFloat(value);

      if (isNaN(parsedVal)) {
        log$1.error('Improper value "' + value + '" supplied for for ' + _dimension);
        return;
      }

      this[privDimension] = parsedVal;
      this.updateStyleEl_();
    };

    /**
     * A getter/setter/toggler for the vjs-fluid `className` on the `Player`.
     *
     * @param {boolean} [bool]
     *        - A value of true adds the class.
     *        - A value of false removes the class.
     *        - No value will toggle the fluid class.
     *
     * @return {boolean|undefined}
     *         - The value of fluid when getting.
     *         - `undefined` when setting.
     */


    Player.prototype.fluid = function fluid(bool) {
      if (bool === undefined) {
        return !!this.fluid_;
      }

      this.fluid_ = !!bool;

      if (bool) {
        this.addClass('vjs-fluid');
      } else {
        this.removeClass('vjs-fluid');
      }

      this.updateStyleEl_();
    };

    /**
     * Get/Set the aspect ratio
     *
     * @param {string} [ratio]
     *        Aspect ratio for player
     *
     * @return {string|undefined}
     *         returns the current aspect ratio when getting
     */

    /**
     * A getter/setter for the `Player`'s aspect ratio.
     *
     * @param {string} [ratio]
     *        The value to set the `Player's aspect ratio to.
     *
     * @return {string|undefined}
     *         - The current aspect ratio of the `Player` when getting.
     *         - undefined when setting
     */


    Player.prototype.aspectRatio = function aspectRatio(ratio) {
      if (ratio === undefined) {
        return this.aspectRatio_;
      }

      // Check for width:height format
      if (!/^\d+\:\d+$/.test(ratio)) {
        throw new Error('Improper value supplied for aspect ratio. The format should be width:height, for example 16:9.');
      }
      this.aspectRatio_ = ratio;

      // We're assuming if you set an aspect ratio you want fluid mode,
      // because in fixed mode you could calculate width and height yourself.
      this.fluid(true);

      this.updateStyleEl_();
    };

    /**
     * Update styles of the `Player` element (height, width and aspect ratio).
     *
     * @private
     * @listens Tech#loadedmetadata
     */


    Player.prototype.updateStyleEl_ = function updateStyleEl_() {
      if (window_1.VIDEOJS_NO_DYNAMIC_STYLE === true) {
        var _width = typeof this.width_ === 'number' ? this.width_ : this.options_.width;
        var _height = typeof this.height_ === 'number' ? this.height_ : this.options_.height;
        var techEl = this.tech_ && this.tech_.el();

        if (techEl) {
          if (_width >= 0) {
            techEl.width = _width;
          }
          if (_height >= 0) {
            techEl.height = _height;
          }
        }

        return;
      }

      var width = void 0;
      var height = void 0;
      var aspectRatio = void 0;
      var idClass = void 0;

      // The aspect ratio is either used directly or to calculate width and height.
      if (this.aspectRatio_ !== undefined && this.aspectRatio_ !== 'auto') {
        // Use any aspectRatio that's been specifically set
        aspectRatio = this.aspectRatio_;
      } else if (this.videoWidth() > 0) {
        // Otherwise try to get the aspect ratio from the video metadata
        aspectRatio = this.videoWidth() + ':' + this.videoHeight();
      } else {
        // Or use a default. The video element's is 2:1, but 16:9 is more common.
        aspectRatio = '16:9';
      }

      // Get the ratio as a decimal we can use to calculate dimensions
      var ratioParts = aspectRatio.split(':');
      var ratioMultiplier = ratioParts[1] / ratioParts[0];

      if (this.width_ !== undefined) {
        // Use any width that's been specifically set
        width = this.width_;
      } else if (this.height_ !== undefined) {
        // Or calulate the width from the aspect ratio if a height has been set
        width = this.height_ / ratioMultiplier;
      } else {
        // Or use the video's metadata, or use the video el's default of 300
        width = this.videoWidth() || 300;
      }

      if (this.height_ !== undefined) {
        // Use any height that's been specifically set
        height = this.height_;
      } else {
        // Otherwise calculate the height from the ratio and the width
        height = width * ratioMultiplier;
      }

      // Ensure the CSS class is valid by starting with an alpha character
      if (/^[^a-zA-Z]/.test(this.id())) {
        idClass = 'dimensions-' + this.id();
      } else {
        idClass = this.id() + '-dimensions';
      }

      // Ensure the right class is still on the player for the style element
      this.addClass(idClass);

      setTextContent(this.styleEl_, '\n      .' + idClass + ' {\n        width: ' + width + 'px;\n        height: ' + height + 'px;\n      }\n\n      .' + idClass + '.vjs-fluid {\n        padding-top: ' + ratioMultiplier * 100 + '%;\n      }\n    ');
    };

    /**
     * Load/Create an instance of playback {@link Tech} including element
     * and API methods. Then append the `Tech` element in `Player` as a child.
     *
     * @param {string} techName
     *        name of the playback technology
     *
     * @param {string} source
     *        video source
     *
     * @private
     */


    Player.prototype.loadTech_ = function loadTech_(techName, source) {
      var _this2 = this;

      // Pause and remove current playback technology
      if (this.tech_) {
        this.unloadTech_();
      }

      var titleTechName = toTitleCase(techName);
      var camelTechName = techName.charAt(0).toLowerCase() + techName.slice(1);

      // get rid of the HTML5 video tag as soon as we are using another tech
      if (titleTechName !== 'Html5' && this.tag) {
        Tech.getTech('Html5').disposeMediaElement(this.tag);
        this.tag.player = null;
        this.tag = null;
      }

      this.techName_ = titleTechName;

      // Turn off API access because we're loading a new tech that might load asynchronously
      this.isReady_ = false;

      // Grab tech-specific options from player options and add source and parent element to use.
      var techOptions = {
        source: source,
        'nativeControlsForTouch': this.options_.nativeControlsForTouch,
        'playerId': this.id(),
        'techId': this.id() + '_' + titleTechName + '_api',
        'autoplay': this.options_.autoplay,
        'playsinline': this.options_.playsinline,
        'preload': this.options_.preload,
        'loop': this.options_.loop,
        'muted': this.options_.muted,
        'poster': this.poster(),
        'language': this.language(),
        'playerElIngest': this.playerElIngest_ || false,
        'vtt.js': this.options_['vtt.js'],
        'canOverridePoster': !!this.options_.techCanOverridePoster,
        'enableSourceset': this.options_.enableSourceset
      };

      ALL.names.forEach(function (name$$1) {
        var props = ALL[name$$1];

        techOptions[props.getterName] = _this2[props.privateName];
      });

      assign(techOptions, this.options_[titleTechName]);
      assign(techOptions, this.options_[camelTechName]);
      assign(techOptions, this.options_[techName.toLowerCase()]);

      if (this.tag) {
        techOptions.tag = this.tag;
      }

      if (source && source.src === this.cache_.src && this.cache_.currentTime > 0) {
        techOptions.startTime = this.cache_.currentTime;
      }

      // Initialize tech instance
      var TechClass = Tech.getTech(techName);

      if (!TechClass) {
        throw new Error('No Tech named \'' + titleTechName + '\' exists! \'' + titleTechName + '\' should be registered using videojs.registerTech()\'');
      }

      this.tech_ = new TechClass(techOptions);

      // player.triggerReady is always async, so don't need this to be async
      this.tech_.ready(bind(this, this.handleTechReady_), true);

      textTrackConverter.jsonToTextTracks(this.textTracksJson_ || [], this.tech_);

      // Listen to all HTML5-defined events and trigger them on the player
      TECH_EVENTS_RETRIGGER.forEach(function (event) {
        _this2.on(_this2.tech_, event, _this2['handleTech' + toTitleCase(event) + '_']);
      });

      Object.keys(TECH_EVENTS_QUEUE).forEach(function (event) {
        _this2.on(_this2.tech_, event, function (eventObj) {
          if (_this2.tech_.playbackRate() === 0 && _this2.tech_.seeking()) {
            _this2.queuedCallbacks_.push({
              callback: _this2['handleTech' + TECH_EVENTS_QUEUE[event] + '_'].bind(_this2),
              event: eventObj
            });
            return;
          }
          _this2['handleTech' + TECH_EVENTS_QUEUE[event] + '_'](eventObj);
        });
      });

      this.on(this.tech_, 'loadstart', this.handleTechLoadStart_);
      this.on(this.tech_, 'sourceset', this.handleTechSourceset_);
      this.on(this.tech_, 'waiting', this.handleTechWaiting_);
      this.on(this.tech_, 'ended', this.handleTechEnded_);
      this.on(this.tech_, 'seeking', this.handleTechSeeking_);
      this.on(this.tech_, 'play', this.handleTechPlay_);
      this.on(this.tech_, 'firstplay', this.handleTechFirstPlay_);
      this.on(this.tech_, 'pause', this.handleTechPause_);
      this.on(this.tech_, 'durationchange', this.handleTechDurationChange_);
      this.on(this.tech_, 'fullscreenchange', this.handleTechFullscreenChange_);
      this.on(this.tech_, 'error', this.handleTechError_);
      this.on(this.tech_, 'loadedmetadata', this.updateStyleEl_);
      this.on(this.tech_, 'posterchange', this.handleTechPosterChange_);
      this.on(this.tech_, 'textdata', this.handleTechTextData_);
      this.on(this.tech_, 'ratechange', this.handleTechRateChange_);

      this.usingNativeControls(this.techGet_('controls'));

      if (this.controls() && !this.usingNativeControls()) {
        this.addTechControlsListeners_();
      }

      // Add the tech element in the DOM if it was not already there
      // Make sure to not insert the original video element if using Html5
      if (this.tech_.el().parentNode !== this.el() && (titleTechName !== 'Html5' || !this.tag)) {
        prependTo(this.tech_.el(), this.el());
      }

      // Get rid of the original video tag reference after the first tech is loaded
      if (this.tag) {
        this.tag.player = null;
        this.tag = null;
      }
    };

    /**
     * Unload and dispose of the current playback {@link Tech}.
     *
     * @private
     */


    Player.prototype.unloadTech_ = function unloadTech_() {
      var _this3 = this;

      // Save the current text tracks so that we can reuse the same text tracks with the next tech
      ALL.names.forEach(function (name$$1) {
        var props = ALL[name$$1];

        _this3[props.privateName] = _this3[props.getterName]();
      });
      this.textTracksJson_ = textTrackConverter.textTracksToJson(this.tech_);

      this.isReady_ = false;

      this.tech_.dispose();

      this.tech_ = false;

      if (this.isPosterFromTech_) {
        this.poster_ = '';
        this.trigger('posterchange');
      }

      this.isPosterFromTech_ = false;
    };

    /**
     * Return a reference to the current {@link Tech}.
     * It will print a warning by default about the danger of using the tech directly
     * but any argument that is passed in will silence the warning.
     *
     * @param {*} [safety]
     *        Anything passed in to silence the warning
     *
     * @return {Tech}
     *         The Tech
     */


    Player.prototype.tech = function tech(safety) {
      if (safety === undefined) {
        log$1.warn(tsml(_templateObject$2));
      }

      return this.tech_;
    };

    /**
     * Set up click and touch listeners for the playback element
     *
     * - On desktops: a click on the video itself will toggle playback
     * - On mobile devices: a click on the video toggles controls
     *   which is done by toggling the user state between active and
     *   inactive
     * - A tap can signal that a user has become active or has become inactive
     *   e.g. a quick tap on an iPhone movie should reveal the controls. Another
     *   quick tap should hide them again (signaling the user is in an inactive
     *   viewing state)
     * - In addition to this, we still want the user to be considered inactive after
     *   a few seconds of inactivity.
     *
     * > Note: the only part of iOS interaction we can't mimic with this setup
     * is a touch and hold on the video element counting as activity in order to
     * keep the controls showing, but that shouldn't be an issue. A touch and hold
     * on any controls will still keep the user active
     *
     * @private
     */


    Player.prototype.addTechControlsListeners_ = function addTechControlsListeners_() {
      // Make sure to remove all the previous listeners in case we are called multiple times.
      this.removeTechControlsListeners_();

      // Some browsers (Chrome & IE) don't trigger a click on a flash swf, but do
      // trigger mousedown/up.
      // http://stackoverflow.com/questions/1444562/javascript-onclick-event-over-flash-object
      // Any touch events are set to block the mousedown event from happening
      this.on(this.tech_, 'mousedown', this.handleTechClick_);

      // If the controls were hidden we don't want that to change without a tap event
      // so we'll check if the controls were already showing before reporting user
      // activity
      this.on(this.tech_, 'touchstart', this.handleTechTouchStart_);
      this.on(this.tech_, 'touchmove', this.handleTechTouchMove_);
      this.on(this.tech_, 'touchend', this.handleTechTouchEnd_);

      // The tap listener needs to come after the touchend listener because the tap
      // listener cancels out any reportedUserActivity when setting userActive(false)
      this.on(this.tech_, 'tap', this.handleTechTap_);
    };

    /**
     * Remove the listeners used for click and tap controls. This is needed for
     * toggling to controls disabled, where a tap/touch should do nothing.
     *
     * @private
     */


    Player.prototype.removeTechControlsListeners_ = function removeTechControlsListeners_() {
      // We don't want to just use `this.off()` because there might be other needed
      // listeners added by techs that extend this.
      this.off(this.tech_, 'tap', this.handleTechTap_);
      this.off(this.tech_, 'touchstart', this.handleTechTouchStart_);
      this.off(this.tech_, 'touchmove', this.handleTechTouchMove_);
      this.off(this.tech_, 'touchend', this.handleTechTouchEnd_);
      this.off(this.tech_, 'mousedown', this.handleTechClick_);
    };

    /**
     * Player waits for the tech to be ready
     *
     * @private
     */


    Player.prototype.handleTechReady_ = function handleTechReady_() {
      this.triggerReady();

      // Keep the same volume as before
      if (this.cache_.volume) {
        this.techCall_('setVolume', this.cache_.volume);
      }

      // Look if the tech found a higher resolution poster while loading
      this.handleTechPosterChange_();

      // Update the duration if available
      this.handleTechDurationChange_();

      // Chrome and Safari both have issues with autoplay.
      // In Safari (5.1.1), when we move the video element into the container div, autoplay doesn't work.
      // In Chrome (15), if you have autoplay + a poster + no controls, the video gets hidden (but audio plays)
      // This fixes both issues. Need to wait for API, so it updates displays correctly
      if ((this.src() || this.currentSrc()) && this.tag && this.options_.autoplay && this.paused()) {
        try {
          // Chrome Fix. Fixed in Chrome v16.
          delete this.tag.poster;
        } catch (e) {
          log$1('deleting tag.poster throws in some browsers', e);
        }
      }
    };

    /**
     * Retrigger the `loadstart` event that was triggered by the {@link Tech}. This
     * function will also trigger {@link Player#firstplay} if it is the first loadstart
     * for a video.
     *
     * @fires Player#loadstart
     * @fires Player#firstplay
     * @listens Tech#loadstart
     * @private
     */


    Player.prototype.handleTechLoadStart_ = function handleTechLoadStart_() {
      // TODO: Update to use `emptied` event instead. See #1277.

      this.removeClass('vjs-ended');
      this.removeClass('vjs-seeking');

      // reset the error state
      this.error(null);

      // If it's already playing we want to trigger a firstplay event now.
      // The firstplay event relies on both the playOld and loadstart events
      // which can happen in any order for a new source
      if (!this.paused()) {
        /**
         * Fired when the user agent begins looking for media data
         *
         * @event Player#loadstart
         * @type {EventTarget~Event}
         */
        this.trigger('loadstart');
        this.trigger('firstplay');
      } else {
        // reset the hasStarted state
        this.hasStarted(false);
        this.trigger('loadstart');
      }
    };

    /**
     * Update the internal source caches so that we return the correct source from
     * `src()`, `currentSource()`, and `currentSources()`.
     *
     * > Note: `currentSources` will not be updated if the source that is passed in exists
     *         in the current `currentSources` cache.
     *
     *
     * @param {Tech~SourceObject} srcObj
     *        A string or object source to update our caches to.
     */


    Player.prototype.updateSourceCaches_ = function updateSourceCaches_() {
      var srcObj = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';


      var src = srcObj;
      var type = '';

      if (typeof src !== 'string') {
        src = srcObj.src;
        type = srcObj.type;
      }
      // make sure all the caches are set to default values
      // to prevent null checking
      this.cache_.source = this.cache_.source || {};
      this.cache_.sources = this.cache_.sources || [];

      // try to get the type of the src that was passed in
      if (src && !type) {
        type = findMimetype(this, src);
      }

      // update `currentSource` cache always
      this.cache_.source = {src: src, type: type};

      var matchingSources = this.cache_.sources.filter(function (s) {
        return s.src && s.src === src;
      });
      var sourceElSources = [];
      var sourceEls = this.$$('source');
      var matchingSourceEls = [];

      for (var i = 0; i < sourceEls.length; i++) {
        var sourceObj = getAttributes(sourceEls[i]);

        sourceElSources.push(sourceObj);

        if (sourceObj.src && sourceObj.src === src) {
          matchingSourceEls.push(sourceObj.src);
        }
      }

      // if we have matching source els but not matching sources
      // the current source cache is not up to date
      if (matchingSourceEls.length && !matchingSources.length) {
        this.cache_.sources = sourceElSources;
        // if we don't have matching source or source els set the
        // sources cache to the `currentSource` cache
      } else if (!matchingSources.length) {
        this.cache_.sources = [this.cache_.source];
      }

      // update the tech `src` cache
      this.cache_.src = src;
    };

    /**
     * *EXPERIMENTAL* Fired when the source is set or changed on the {@link Tech}
     * causing the media element to reload.
     *
     * It will fire for the initial source and each subsequent source.
     * This event is a custom event from Video.js and is triggered by the {@link Tech}.
     *
     * The event object for this event contains a `src` property that will contain the source
     * that was available when the event was triggered. This is generally only necessary if Video.js
     * is switching techs while the source was being changed.
     *
     * It is also fired when `load` is called on the player (or media element)
     * because the {@link https://html.spec.whatwg.org/multipage/media.html#dom-media-load|specification for `load`}
     * says that the resource selection algorithm needs to be aborted and restarted.
     * In this case, it is very likely that the `src` property will be set to the
     * empty string `""` to indicate we do not know what the source will be but
     * that it is changing.
     *
     * *This event is currently still experimental and may change in minor releases.*
     * __To use this, pass `enableSourceset` option to the player.__
     *
     * @event Player#sourceset
     * @type {EventTarget~Event}
     * @prop {string} src
     *                The source url available when the `sourceset` was triggered.
     *                It will be an empty string if we cannot know what the source is
     *                but know that the source will change.
     */
    /**
     * Retrigger the `sourceset` event that was triggered by the {@link Tech}.
     *
     * @fires Player#sourceset
     * @listens Tech#sourceset
     * @private
     */


    Player.prototype.handleTechSourceset_ = function handleTechSourceset_(event) {
      var _this4 = this;

      // only update the source cache when the source
      // was not updated using the player api
      if (!this.changingSrc_) {
        // update the source to the intial source right away
        // in some cases this will be empty string
        this.updateSourceCaches_(event.src);

        // if the `sourceset` `src` was an empty string
        // wait for a `loadstart` to update the cache to `currentSrc`.
        // If a sourceset happens before a `loadstart`, we reset the state
        // as this function will be called again.
        if (!event.src) {
          var updateCache = function updateCache(e) {
            if (e.type !== 'sourceset') {
              _this4.updateSourceCaches_(_this4.techGet_('currentSrc'));
            }

            _this4.tech_.off(['sourceset', 'loadstart'], updateCache);
          };

          this.tech_.one(['sourceset', 'loadstart'], updateCache);
        }
      }

      this.trigger({
        src: event.src,
        type: 'sourceset'
      });
    };

    /**
     * Add/remove the vjs-has-started class
     *
     * @fires Player#firstplay
     *
     * @param {boolean} request
     *        - true: adds the class
     *        - false: remove the class
     *
     * @return {boolean}
     *         the boolean value of hasStarted_
     */


    Player.prototype.hasStarted = function hasStarted(request) {
      if (request === undefined) {
        // act as getter, if we have no request to change
        return this.hasStarted_;
      }

      if (request === this.hasStarted_) {
        return;
      }

      this.hasStarted_ = request;

      if (this.hasStarted_) {
        this.addClass('vjs-has-started');
        this.trigger('firstplay');
      } else {
        this.removeClass('vjs-has-started');
      }
    };

    /**
     * Fired whenever the media begins or resumes playback
     *
     * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-play}
     * @fires Player#play
     * @listens Tech#play
     * @private
     */


    Player.prototype.handleTechPlay_ = function handleTechPlay_() {
      this.removeClass('vjs-ended');
      this.removeClass('vjs-paused');
      this.addClass('vjs-playing');

      // hide the poster when the user hits playOld
      this.hasStarted(true);
      /**
       * Triggered whenever an {@link Tech#play} event happens. Indicates that
       * playback has started or resumed.
       *
       * @event Player#play
       * @type {EventTarget~Event}
       */
      this.trigger('play');
    };

    /**
     * Retrigger the `ratechange` event that was triggered by the {@link Tech}.
     *
     * If there were any events queued while the playback rate was zero, fire
     * those events now.
     *
     * @private
     * @method Player#handleTechRateChange_
     * @fires Player#ratechange
     * @listens Tech#ratechange
     */


    Player.prototype.handleTechRateChange_ = function handleTechRateChange_() {
      if (this.tech_.playbackRate() > 0 && this.cache_.lastPlaybackRate === 0) {
        this.queuedCallbacks_.forEach(function (queued) {
          return queued.callback(queued.event);
        });
        this.queuedCallbacks_ = [];
      }
      this.cache_.lastPlaybackRate = this.tech_.playbackRate();
      /**
       * Fires when the playing speed of the audio/video is changed
       *
       * @event Player#ratechange
       * @type {event}
       */
      this.trigger('ratechange');
    };

    /**
     * Retrigger the `waiting` event that was triggered by the {@link Tech}.
     *
     * @fires Player#waiting
     * @listens Tech#waiting
     * @private
     */


    Player.prototype.handleTechWaiting_ = function handleTechWaiting_() {
      var _this5 = this;

      this.addClass('vjs-waiting');
      /**
       * A readyState change on the DOM element has caused playback to stop.
       *
       * @event Player#waiting
       * @type {EventTarget~Event}
       */
      this.trigger('waiting');
      this.one('timeupdate', function () {
        return _this5.removeClass('vjs-waiting');
      });
    };

    /**
     * Retrigger the `canplay` event that was triggered by the {@link Tech}.
     * > Note: This is not consistent between browsers. See #1351
     *
     * @fires Player#canplay
     * @listens Tech#canplay
     * @private
     */


    Player.prototype.handleTechCanPlay_ = function handleTechCanPlay_() {
      this.removeClass('vjs-waiting');
      /**
       * The media has a readyState of HAVE_FUTURE_DATA or greater.
       *
       * @event Player#canplay
       * @type {EventTarget~Event}
       */
      this.trigger('canplay');
    };

    /**
     * Retrigger the `canplaythrough` event that was triggered by the {@link Tech}.
     *
     * @fires Player#canplaythrough
     * @listens Tech#canplaythrough
     * @private
     */


    Player.prototype.handleTechCanPlayThrough_ = function handleTechCanPlayThrough_() {
      this.removeClass('vjs-waiting');
      /**
       * The media has a readyState of HAVE_ENOUGH_DATA or greater. This means that the
       * entire media file can be played without buffering.
       *
       * @event Player#canplaythrough
       * @type {EventTarget~Event}
       */
      this.trigger('canplaythrough');
    };

    /**
     * Retrigger the `playing` event that was triggered by the {@link Tech}.
     *
     * @fires Player#playing
     * @listens Tech#playing
     * @private
     */


    Player.prototype.handleTechPlaying_ = function handleTechPlaying_() {
      this.removeClass('vjs-waiting');
      /**
       * The media is no longer blocked from playback, and has started playing.
       *
       * @event Player#playing
       * @type {EventTarget~Event}
       */
      this.trigger('playing');
    };

    /**
     * Retrigger the `seeking` event that was triggered by the {@link Tech}.
     *
     * @fires Player#seeking
     * @listens Tech#seeking
     * @private
     */


    Player.prototype.handleTechSeeking_ = function handleTechSeeking_() {
      this.addClass('vjs-seeking');
      /**
       * Fired whenever the player is jumping to a new time
       *
       * @event Player#seeking
       * @type {EventTarget~Event}
       */
      this.trigger('seeking');
    };

    /**
     * Retrigger the `seeked` event that was triggered by the {@link Tech}.
     *
     * @fires Player#seeked
     * @listens Tech#seeked
     * @private
     */


    Player.prototype.handleTechSeeked_ = function handleTechSeeked_() {
      this.removeClass('vjs-seeking');
      /**
       * Fired when the player has finished jumping to a new time
       *
       * @event Player#seeked
       * @type {EventTarget~Event}
       */
      this.trigger('seeked');
    };

    /**
     * Retrigger the `firstplay` event that was triggered by the {@link Tech}.
     *
     * @fires Player#firstplay
     * @listens Tech#firstplay
     * @deprecated As of 6.0 firstplay event is deprecated.
     * @deprecated As of 6.0 passing the `starttime` option to the player and the firstplay event are deprecated.
     * @private
     */


    Player.prototype.handleTechFirstPlay_ = function handleTechFirstPlay_() {
      // If the first starttime attribute is specified
      // then we will start at the given offset in seconds
      if (this.options_.starttime) {
        log$1.warn('Passing the `starttime` option to the player will be deprecated in 6.0');
        this.currentTime(this.options_.starttime);
      }

      this.addClass('vjs-has-started');
      /**
       * Fired the first time a video is played. Not part of the HLS spec, and this is
       * probably not the best implementation yet, so use sparingly. If you don't have a
       * reason to prevent playback, use `myPlayer.one('playOld');` instead.
       *
       * @event Player#firstplay
       * @deprecated As of 6.0 firstplay event is deprecated.
       * @type {EventTarget~Event}
       */
      this.trigger('firstplay');
    };

    /**
     * Retrigger the `pause` event that was triggered by the {@link Tech}.
     *
     * @fires Player#pause
     * @listens Tech#pause
     * @private
     */


    Player.prototype.handleTechPause_ = function handleTechPause_() {
      this.removeClass('vjs-playing');
      this.addClass('vjs-paused');
      /**
       * Fired whenever the media has been paused
       *
       * @event Player#pause
       * @type {EventTarget~Event}
       */
      this.trigger('pause');
    };

    /**
     * Retrigger the `ended` event that was triggered by the {@link Tech}.
     *
     * @fires Player#ended
     * @listens Tech#ended
     * @private
     */


    Player.prototype.handleTechEnded_ = function handleTechEnded_() {
      this.addClass('vjs-ended');
      if (this.options_.loop) {
        this.currentTime(0);
        this.play();
      } else if (!this.paused()) {
        this.pause();
      }

      /**
       * Fired when the end of the media resource is reached (currentTime == duration)
       *
       * @event Player#ended
       * @type {EventTarget~Event}
       */
      this.trigger('ended');
    };

    /**
     * Fired when the duration of the media resource is first known or changed
     *
     * @listens Tech#durationchange
     * @private
     */


    Player.prototype.handleTechDurationChange_ = function handleTechDurationChange_() {
      this.duration(this.techGet_('duration'));
    };

    /**
     * Handle a click on the media element to playOld/pause
     *
     * @param {EventTarget~Event} event
     *        the event that caused this function to trigger
     *
     * @listens Tech#mousedown
     * @private
     */


    Player.prototype.handleTechClick_ = function handleTechClick_(event) {
      if (!isSingleLeftClick(event)) {
        return;
      }

      // When controls are disabled a click should not toggle playback because
      // the click is considered a control
      if (!this.controls_) {
        return;
      }

      if (this.paused()) {
        this.play();
      } else {
        this.pause();
      }
    };

    /**
     * Handle a tap on the media element. It will toggle the user
     * activity state, which hides and shows the controls.
     *
     * @listens Tech#tap
     * @private
     */


    Player.prototype.handleTechTap_ = function handleTechTap_() {
      this.userActive(!this.userActive());
    };

    /**
     * Handle touch to start
     *
     * @listens Tech#touchstart
     * @private
     */


    Player.prototype.handleTechTouchStart_ = function handleTechTouchStart_() {
      this.userWasActive = this.userActive();
    };

    /**
     * Handle touch to move
     *
     * @listens Tech#touchmove
     * @private
     */


    Player.prototype.handleTechTouchMove_ = function handleTechTouchMove_() {
      if (this.userWasActive) {
        this.reportUserActivity();
      }
    };

    /**
     * Handle touch to end
     *
     * @param {EventTarget~Event} event
     *        the touchend event that triggered
     *        this function
     *
     * @listens Tech#touchend
     * @private
     */


    Player.prototype.handleTechTouchEnd_ = function handleTechTouchEnd_(event) {
      // Stop the mouse events from also happening
      event.preventDefault();
    };

    /**
     * Fired when the player switches in or out of fullscreen mode
     *
     * @private
     * @listens Player#fullscreenchange
     */


    Player.prototype.handleFullscreenChange_ = function handleFullscreenChange_() {
      if (this.isFullscreen()) {
        this.addClass('vjs-fullscreen');
      } else {
        this.removeClass('vjs-fullscreen');
      }
    };

    /**
     * native click events on the SWF aren't triggered on IE11, Win8.1RT
     * use stageclick events triggered from inside the SWF instead
     *
     * @private
     * @listens stageclick
     */


    Player.prototype.handleStageClick_ = function handleStageClick_() {
      this.reportUserActivity();
    };

    /**
     * Handle Tech Fullscreen Change
     *
     * @param {EventTarget~Event} event
     *        the fullscreenchange event that triggered this function
     *
     * @param {Object} data
     *        the data that was sent with the event
     *
     * @private
     * @listens Tech#fullscreenchange
     * @fires Player#fullscreenchange
     */


    Player.prototype.handleTechFullscreenChange_ = function handleTechFullscreenChange_(event, data) {
      if (data) {
        this.isFullscreen(data.isFullscreen);
      }
      /**
       * Fired when going in and out of fullscreen.
       *
       * @event Player#fullscreenchange
       * @type {EventTarget~Event}
       */
      this.trigger('fullscreenchange');
    };

    /**
     * Fires when an error occurred during the loading of an audio/video.
     *
     * @private
     * @listens Tech#error
     */


    Player.prototype.handleTechError_ = function handleTechError_() {
      var error = this.tech_.error();

      this.error(error);
    };

    /**
     * Retrigger the `textdata` event that was triggered by the {@link Tech}.
     *
     * @fires Player#textdata
     * @listens Tech#textdata
     * @private
     */


    Player.prototype.handleTechTextData_ = function handleTechTextData_() {
      var data = null;

      if (arguments.length > 1) {
        data = arguments[1];
      }

      /**
       * Fires when we get a textdata event from tech
       *
       * @event Player#textdata
       * @type {EventTarget~Event}
       */
      this.trigger('textdata', data);
    };

    /**
     * Get object for cached values.
     *
     * @return {Object}
     *         get the current object cache
     */


    Player.prototype.getCache = function getCache() {
      return this.cache_;
    };

    /**
     * Pass values to the playback tech
     *
     * @param {string} [method]
     *        the method to call
     *
     * @param {Object} arg
     *        the argument to pass
     *
     * @private
     */


    Player.prototype.techCall_ = function techCall_(method, arg) {
      // If it's not ready yet, call method when it is

      this.ready(function () {
        if (method in allowedSetters) {
          return set$1(this.middleware_, this.tech_, method, arg);
        } else if (method in allowedMediators) {
          return mediate(this.middleware_, this.tech_, method, arg);
        }

        try {
          if (this.tech_) {
            this.tech_[method](arg);
          }
        } catch (e) {
          log$1(e);
          throw e;
        }
      }, true);
    };

    /**
     * Get calls can't wait for the tech, and sometimes don't need to.
     *
     * @param {string} method
     *        Tech method
     *
     * @return {Function|undefined}
     *         the method or undefined
     *
     * @private
     */


    Player.prototype.techGet_ = function techGet_(method) {
      if (!this.tech_ || !this.tech_.isReady_) {
        return;
      }

      if (method in allowedGetters) {
        return get$1(this.middleware_, this.tech_, method);
      } else if (method in allowedMediators) {
        return mediate(this.middleware_, this.tech_, method);
      }

      // Flash likes to die and reload when you hide or reposition it.
      // In these cases the object methods go away and we get errors.
      // When that happens we'll catch the errors and inform tech that it's not ready any more.
      try {
        return this.tech_[method]();
      } catch (e) {

        // When building additional tech libs, an expected method may not be defined yet
        if (this.tech_[method] === undefined) {
          log$1('Video.js: ' + method + ' method not defined for ' + this.techName_ + ' playback technology.', e);
          throw e;
        }

        // When a method isn't available on the object it throws a TypeError
        if (e.name === 'TypeError') {
          log$1('Video.js: ' + method + ' unavailable on ' + this.techName_ + ' playback technology element.', e);
          this.tech_.isReady_ = false;
          throw e;
        }

        // If error unknown, just log and throw
        log$1(e);
        throw e;
      }
    };

    /**
     * Attempt to begin playback at the first opportunity.
     *
     * @return {Promise|undefined}
     *         Returns a `Promise` only if the browser returns one and the player
     *         is ready to begin playback. For some browsers and all non-ready
     *         situations, this will return `undefined`.
     */


    Player.prototype.play = function play() {
      var _this6 = this;

      // If this is called while we have a playOld queued up on a loadstart, remove
      // that listener to avoid getting in a potentially bad state.
      if (this.playOnLoadstart_) {
        this.off('loadstart', this.playOnLoadstart_);
      }

      // If the player/tech is not ready, queue up another call to `playOld()` for
      // when it is. This will loop back into this method for another attempt at
      // playback when the tech is ready.
      if (!this.isReady_) {

        // Bail out if we're already waiting for `ready`!
        if (this.playWaitingForReady_) {
          return;
        }

        this.playWaitingForReady_ = true;
        this.ready(function () {
          _this6.playWaitingForReady_ = false;
          silencePromise(_this6.play());
        });

        // If the player/tech is ready and we have a source, we can attempt playback.
      } else if (!this.changingSrc_ && (this.src() || this.currentSrc())) {
        return this.techGet_('play');

        // If the tech is ready, but we do not have a source, we'll need to wait
        // for both the `ready` and a `loadstart` when the source is finally
        // resolved by middleware and set on the player.
        //
        // This can happen if `playOld()` is called while changing sources or before
        // one has been set on the player.
      } else {

        this.playOnLoadstart_ = function () {
          _this6.playOnLoadstart_ = null;
          silencePromise(_this6.play());
        };

        this.one('loadstart', this.playOnLoadstart_);
      }
    };

    /**
     * Pause the video playback
     *
     * @return {Player}
     *         A reference to the player object this function was called on
     */


    Player.prototype.pause = function pause() {
      this.techCall_('pause');
    };

    /**
     * Check if the player is paused or has yet to playOld
     *
     * @return {boolean}
     *         - false: if the media is currently playing
     *         - true: if media is not currently playing
     */


    Player.prototype.paused = function paused() {
      // The initial state of paused should be true (in Safari it's actually false)
      return this.techGet_('paused') === false ? false : true;
    };

    /**
     * Get a TimeRange object representing the current ranges of time that the user
     * has played.
     *
     * @return {TimeRange}
     *         A time range object that represents all the increments of time that have
     *         been played.
     */


    Player.prototype.played = function played() {
      return this.techGet_('played') || createTimeRanges(0, 0);
    };

    /**
     * Returns whether or not the user is "scrubbing". Scrubbing is
     * when the user has clicked the progress bar handle and is
     * dragging it along the progress bar.
     *
     * @param {boolean} [isScrubbing]
     *        whether the user is or is not scrubbing
     *
     * @return {boolean}
     *         The value of scrubbing when getting
     */


    Player.prototype.scrubbing = function scrubbing(isScrubbing) {
      if (typeof isScrubbing === 'undefined') {
        return this.scrubbing_;
      }
      this.scrubbing_ = !!isScrubbing;

      if (isScrubbing) {
        this.addClass('vjs-scrubbing');
      } else {
        this.removeClass('vjs-scrubbing');
      }
    };

    /**
     * Get or set the current time (in seconds)
     *
     * @param {number|string} [seconds]
     *        The time to seek to in seconds
     *
     * @return {number}
     *         - the current time in seconds when getting
     */


    Player.prototype.currentTime = function currentTime(seconds) {
      if (typeof seconds !== 'undefined') {
        if (seconds < 0) {
          seconds = 0;
        }
        this.techCall_('setCurrentTime', seconds);
        return;
      }

      // cache last currentTime and return. default to 0 seconds
      //
      // Caching the currentTime is meant to prevent a massive amount of reads on the tech's
      // currentTime when scrubbing, but may not provide much performance benefit afterall.
      // Should be tested. Also something has to read the actual current time or the cache will
      // never get updated.
      this.cache_.currentTime = this.techGet_('currentTime') || 0;
      return this.cache_.currentTime;
    };

    /**
     * Normally gets the length in time of the video in seconds;
     * in all but the rarest use cases an argument will NOT be passed to the method
     *
     * > **NOTE**: The video must have started loading before the duration can be
     * known, and in the case of Flash, may not be known until the video starts
     * playing.
     *
     * @fires Player#durationchange
     *
     * @param {number} [seconds]
     *        The duration of the video to set in seconds
     *
     * @return {number}
     *         - The duration of the video in seconds when getting
     */


    Player.prototype.duration = function duration(seconds) {
      if (seconds === undefined) {
        // return NaN if the duration is not known
        return this.cache_.duration !== undefined ? this.cache_.duration : NaN;
      }

      seconds = parseFloat(seconds);

      // Standardize on Infinity for signaling video is live
      if (seconds < 0) {
        seconds = Infinity;
      }

      if (seconds !== this.cache_.duration) {
        // Cache the last set value for optimized scrubbing (esp. Flash)
        this.cache_.duration = seconds;

        if (seconds === Infinity) {
          this.addClass('vjs-live');
        } else {
          this.removeClass('vjs-live');
        }
        /**
         * @event Player#durationchange
         * @type {EventTarget~Event}
         */
        this.trigger('durationchange');
      }
    };

    /**
     * Calculates how much time is left in the video. Not part
     * of the native video API.
     *
     * @return {number}
     *         The time remaining in seconds
     */


    Player.prototype.remainingTime = function remainingTime() {
      return this.duration() - this.currentTime();
    };

    /**
     * A remaining time function that is intented to be used when
     * the time is to be displayed directly to the user.
     *
     * @return {number}
     *         The rounded time remaining in seconds
     */


    Player.prototype.remainingTimeDisplay = function remainingTimeDisplay() {
      return Math.floor(this.duration()) - Math.floor(this.currentTime());
    };

    //
    // Kind of like an array of portions of the video that have been downloaded.

    /**
     * Get a TimeRange object with an array of the times of the video
     * that have been downloaded. If you just want the percent of the
     * video that's been downloaded, use bufferedPercent.
     *
     * @see [Buffered Spec]{@link http://dev.w3.org/html5/spec/video.html#dom-media-buffered}
     *
     * @return {TimeRange}
     *         A mock TimeRange object (following HTML spec)
     */


    Player.prototype.buffered = function buffered() {
      var buffered = this.techGet_('buffered');

      if (!buffered || !buffered.length) {
        buffered = createTimeRanges(0, 0);
      }

      return buffered;
    };

    /**
     * Get the percent (as a decimal) of the video that's been downloaded.
     * This method is not a part of the native HTML video API.
     *
     * @return {number}
     *         A decimal between 0 and 1 representing the percent
     *         that is buffered 0 being 0% and 1 being 100%
     */


    Player.prototype.bufferedPercent = function bufferedPercent$$1() {
      return bufferedPercent(this.buffered(), this.duration());
    };

    /**
     * Get the ending time of the last buffered time range
     * This is used in the progress bar to encapsulate all time ranges.
     *
     * @return {number}
     *         The end of the last buffered time range
     */


    Player.prototype.bufferedEnd = function bufferedEnd() {
      var buffered = this.buffered();
      var duration = this.duration();
      var end = buffered.end(buffered.length - 1);

      if (end > duration) {
        end = duration;
      }

      return end;
    };

    /**
     * Get or set the current volume of the media
     *
     * @param  {number} [percentAsDecimal]
     *         The new volume as a decimal percent:
     *         - 0 is muted/0%/off
     *         - 1.0 is 100%/full
     *         - 0.5 is half volume or 50%
     *
     * @return {number}
     *         The current volume as a percent when getting
     */


    Player.prototype.volume = function volume(percentAsDecimal) {
      var vol = void 0;

      if (percentAsDecimal !== undefined) {
        // Force value to between 0 and 1
        vol = Math.max(0, Math.min(1, parseFloat(percentAsDecimal)));
        this.cache_.volume = vol;
        this.techCall_('setVolume', vol);

        if (vol > 0) {
          this.lastVolume_(vol);
        }

        return;
      }

      // Default to 1 when returning current volume.
      vol = parseFloat(this.techGet_('volume'));
      return isNaN(vol) ? 1 : vol;
    };

    /**
     * Get the current muted state, or turn mute on or off
     *
     * @param {boolean} [muted]
     *        - true to mute
     *        - false to unmute
     *
     * @return {boolean}
     *         - true if mute is on and getting
     *         - false if mute is off and getting
     */


    Player.prototype.muted = function muted(_muted) {
      if (_muted !== undefined) {
        this.techCall_('setMuted', _muted);
        return;
      }
      return this.techGet_('muted') || false;
    };

    /**
     * Get the current defaultMuted state, or turn defaultMuted on or off. defaultMuted
     * indicates the state of muted on initial playback.
     *
     * ```js
     *   var myPlayer = videojs('some-player-id');
     *
     *   myPlayer.src("http://www.example.com/path/to/video.mp4");
     *
     *   // get, should be false
     *   console.log(myPlayer.defaultMuted());
     *   // set to true
     *   myPlayer.defaultMuted(true);
     *   // get should be true
     *   console.log(myPlayer.defaultMuted());
     * ```
     *
     * @param {boolean} [defaultMuted]
     *        - true to mute
     *        - false to unmute
     *
     * @return {boolean|Player}
     *         - true if defaultMuted is on and getting
     *         - false if defaultMuted is off and getting
     *         - A reference to the current player when setting
     */


    Player.prototype.defaultMuted = function defaultMuted(_defaultMuted) {
      if (_defaultMuted !== undefined) {
        return this.techCall_('setDefaultMuted', _defaultMuted);
      }
      return this.techGet_('defaultMuted') || false;
    };

    /**
     * Get the last volume, or set it
     *
     * @param  {number} [percentAsDecimal]
     *         The new last volume as a decimal percent:
     *         - 0 is muted/0%/off
     *         - 1.0 is 100%/full
     *         - 0.5 is half volume or 50%
     *
     * @return {number}
     *         the current value of lastVolume as a percent when getting
     *
     * @private
     */


    Player.prototype.lastVolume_ = function lastVolume_(percentAsDecimal) {
      if (percentAsDecimal !== undefined && percentAsDecimal !== 0) {
        this.cache_.lastVolume = percentAsDecimal;
        return;
      }
      return this.cache_.lastVolume;
    };

    /**
     * Check if current tech can support native fullscreen
     * (e.g. with built in controls like iOS, so not our flash swf)
     *
     * @return {boolean}
     *         if native fullscreen is supported
     */


    Player.prototype.supportsFullScreen = function supportsFullScreen() {
      return this.techGet_('supportsFullScreen') || false;
    };

    /**
     * Check if the player is in fullscreen mode or tell the player that it
     * is or is not in fullscreen mode.
     *
     * > NOTE: As of the latest HTML5 spec, isFullscreen is no longer an official
     * property and instead document.fullscreenElement is used. But isFullscreen is
     * still a valuable property for internal player workings.
     *
     * @param  {boolean} [isFS]
     *         Set the players current fullscreen state
     *
     * @return {boolean}
     *         - true if fullscreen is on and getting
     *         - false if fullscreen is off and getting
     */


    Player.prototype.isFullscreen = function isFullscreen(isFS) {
      if (isFS !== undefined) {
        this.isFullscreen_ = !!isFS;
        return;
      }
      return !!this.isFullscreen_;
    };

    /**
     * Increase the size of the video to full screen
     * In some browsers, full screen is not supported natively, so it enters
     * "full window mode", where the video fills the browser window.
     * In browsers and devices that support native full screen, sometimes the
     * browser's default controls will be shown, and not the Video.js custom skin.
     * This includes most mobile devices (iOS, Android) and older versions of
     * Safari.
     *
     * @fires Player#fullscreenchange
     */


    Player.prototype.requestFullscreen = function requestFullscreen() {
      var fsApi = FullscreenApi;

      this.isFullscreen(true);

      if (fsApi.requestFullscreen) {
        // the browser supports going fullscreen at the element level so we can
        // take the controls fullscreen as well as the video

        // Trigger fullscreenchange event after change
        // We have to specifically add this each time, and remove
        // when canceling fullscreen. Otherwise if there's multiple
        // players on a page, they would all be reacting to the same fullscreen
        // events
        on(document_1, fsApi.fullscreenchange, bind(this, function documentFullscreenChange(e) {
          this.isFullscreen(document_1[fsApi.fullscreenElement]);

          // If cancelling fullscreen, remove event listener.
          if (this.isFullscreen() === false) {
            off(document_1, fsApi.fullscreenchange, documentFullscreenChange);
          }
          /**
           * @event Player#fullscreenchange
           * @type {EventTarget~Event}
           */
          this.trigger('fullscreenchange');
        }));

        this.el_[fsApi.requestFullscreen]();
      } else if (this.tech_.supportsFullScreen()) {
        // we can't take the video.js controls fullscreen but we can go fullscreen
        // with native controls
        this.techCall_('enterFullScreen');
      } else {
        // fullscreen isn't supported so we'll just stretch the video element to
        // fill the viewport
        this.enterFullWindow();
        /**
         * @event Player#fullscreenchange
         * @type {EventTarget~Event}
         */
        this.trigger('fullscreenchange');
      }
    };

    /**
     * Return the video to its normal size after having been in full screen mode
     *
     * @fires Player#fullscreenchange
     */


    Player.prototype.exitFullscreen = function exitFullscreen() {
      var fsApi = FullscreenApi;

      this.isFullscreen(false);

      // Check for browser element fullscreen support
      if (fsApi.requestFullscreen) {
        document_1[fsApi.exitFullscreen]();
      } else if (this.tech_.supportsFullScreen()) {
        this.techCall_('exitFullScreen');
      } else {
        this.exitFullWindow();
        /**
         * @event Player#fullscreenchange
         * @type {EventTarget~Event}
         */
        this.trigger('fullscreenchange');
      }
    };

    /**
     * When fullscreen isn't supported we can stretch the
     * video container to as wide as the browser will let us.
     *
     * @fires Player#enterFullWindow
     */


    Player.prototype.enterFullWindow = function enterFullWindow() {
      this.isFullWindow = true;

      // Storing original doc overflow value to return to when fullscreen is off
      this.docOrigOverflow = document_1.documentElement.style.overflow;

      // Add listener for esc key to exit fullscreen
      on(document_1, 'keydown', bind(this, this.fullWindowOnEscKey));

      // Hide any scroll bars
      document_1.documentElement.style.overflow = 'hidden';

      // Apply fullscreen styles
      addClass(document_1.body, 'vjs-full-window');

      /**
       * @event Player#enterFullWindow
       * @type {EventTarget~Event}
       */
      this.trigger('enterFullWindow');
    };

    /**
     * Check for call to either exit full window or
     * full screen on ESC key
     *
     * @param {string} event
     *        Event to check for key press
     */


    Player.prototype.fullWindowOnEscKey = function fullWindowOnEscKey(event) {
      if (event.keyCode === 27) {
        if (this.isFullscreen() === true) {
          this.exitFullscreen();
        } else {
          this.exitFullWindow();
        }
      }
    };

    /**
     * Exit full window
     *
     * @fires Player#exitFullWindow
     */


    Player.prototype.exitFullWindow = function exitFullWindow() {
      this.isFullWindow = false;
      off(document_1, 'keydown', this.fullWindowOnEscKey);

      // Unhide scroll bars.
      document_1.documentElement.style.overflow = this.docOrigOverflow;

      // Remove fullscreen styles
      removeClass(document_1.body, 'vjs-full-window');

      // Resize the box, controller, and poster to original sizes
      // this.positionAll();
      /**
       * @event Player#exitFullWindow
       * @type {EventTarget~Event}
       */
      this.trigger('exitFullWindow');
    };

    /**
     * Check whether the player can playOld a given mimetype
     *
     * @see https://www.w3.org/TR/2011/WD-html5-20110113/video.html#dom-navigator-canplaytype
     *
     * @param {string} type
     *        The mimetype to check
     *
     * @return {string}
     *         'probably', 'maybe', or '' (empty string)
     */


    Player.prototype.canPlayType = function canPlayType(type) {
      var can = void 0;

      // Loop through each playback technology in the options order
      for (var i = 0, j = this.options_.techOrder; i < j.length; i++) {
        var techName = j[i];
        var tech = Tech.getTech(techName);

        // Support old behavior of techs being registered as components.
        // Remove once that deprecated behavior is removed.
        if (!tech) {
          tech = Component.getComponent(techName);
        }

        // Check if the current tech is defined before continuing
        if (!tech) {
          log$1.error('The "' + techName + '" tech is undefined. Skipped browser support check for that tech.');
          continue;
        }

        // Check if the browser supports this technology
        if (tech.isSupported()) {
          can = tech.canPlayType(type);

          if (can) {
            return can;
          }
        }
      }

      return '';
    };

    /**
     * Select source based on tech-order or source-order
     * Uses source-order selection if `options.sourceOrder` is truthy. Otherwise,
     * defaults to tech-order selection
     *
     * @param {Array} sources
     *        The sources for a media asset
     *
     * @return {Object|boolean}
     *         Object of source and tech order or false
     */


    Player.prototype.selectSource = function selectSource(sources) {
      var _this7 = this;

      // Get only the techs specified in `techOrder` that exist and are supported by the
      // current platform
      var techs = this.options_.techOrder.map(function (techName) {
        return [techName, Tech.getTech(techName)];
      }).filter(function (_ref) {
        var techName = _ref[0],
          tech = _ref[1];

        // Check if the current tech is defined before continuing
        if (tech) {
          // Check if the browser supports this technology
          return tech.isSupported();
        }

        log$1.error('The "' + techName + '" tech is undefined. Skipped browser support check for that tech.');
        return false;
      });

      // Iterate over each `innerArray` element once per `outerArray` element and execute
      // `tester` with both. If `tester` returns a non-falsy value, exit early and return
      // that value.
      var findFirstPassingTechSourcePair = function findFirstPassingTechSourcePair(outerArray, innerArray, tester) {
        var found = void 0;

        outerArray.some(function (outerChoice) {
          return innerArray.some(function (innerChoice) {
            found = tester(outerChoice, innerChoice);

            if (found) {
              return true;
            }
          });
        });

        return found;
      };

      var foundSourceAndTech = void 0;
      var flip = function flip(fn) {
        return function (a, b) {
          return fn(b, a);
        };
      };
      var finder = function finder(_ref2, source) {
        var techName = _ref2[0],
          tech = _ref2[1];

        if (tech.canPlaySource(source, _this7.options_[techName.toLowerCase()])) {
          return {source: source, tech: techName};
        }
      };

      // Depending on the truthiness of `options.sourceOrder`, we swap the order of techs and sources
      // to select from them based on their priority.
      if (this.options_.sourceOrder) {
        // Source-first ordering
        foundSourceAndTech = findFirstPassingTechSourcePair(sources, techs, flip(finder));
      } else {
        // Tech-first ordering
        foundSourceAndTech = findFirstPassingTechSourcePair(techs, sources, finder);
      }

      return foundSourceAndTech || false;
    };

    /**
     * Get or set the video source.
     *
     * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]
     *        A SourceObject, an array of SourceObjects, or a string referencing
     *        a URL to a media source. It is _highly recommended_ that an object
     *        or array of objects is used here, so that source selection
     *        algorithms can take the `type` into account.
     *
     *        If not provided, this method acts as a getter.
     *
     * @return {string|undefined}
     *         If the `source` argument is missing, returns the current source
     *         URL. Otherwise, returns nothing/undefined.
     */


    Player.prototype.src = function src(source) {
      var _this8 = this;

      // getter usage
      if (typeof source === 'undefined') {
        return this.cache_.src || '';
      }
      // filter out invalid sources and turn our source into
      // an array of source objects
      var sources = filterSource(source);

      // if a source was passed in then it is invalid because
      // it was filtered to a zero length Array. So we have to
      // show an error
      if (!sources.length) {
        this.setTimeout(function () {
          this.error({code: 4, message: this.localize(this.options_.notSupportedMessage)});
        }, 0);
        return;
      }

      // intial sources
      this.changingSrc_ = true;

      this.cache_.sources = sources;
      this.updateSourceCaches_(sources[0]);

      // middlewareSource is the source after it has been changed by middleware
      setSource(this, sources[0], function (middlewareSource, mws) {
        _this8.middleware_ = mws;

        // since sourceSet is async we have to update the cache again after we select a source since
        // the source that is selected could be out of order from the cache update above this callback.
        _this8.cache_.sources = sources;
        _this8.updateSourceCaches_(middlewareSource);

        var err = _this8.src_(middlewareSource);

        if (err) {
          if (sources.length > 1) {
            return _this8.src(sources.slice(1));
          }

          _this8.changingSrc_ = false;

          // We need to wrap this in a timeout to give folks a chance to add error event handlers
          _this8.setTimeout(function () {
            this.error({code: 4, message: this.localize(this.options_.notSupportedMessage)});
          }, 0);

          // we could not find an appropriate tech, but let's still notify the delegate that this is it
          // this needs a better comment about why this is needed
          _this8.triggerReady();

          return;
        }

        setTech(mws, _this8.tech_);
      });
    };

    /**
     * Set the source object on the tech, returns a boolean that indicates whether
     * there is a tech that can playOld the source or not
     *
     * @param {Tech~SourceObject} source
     *        The source object to set on the Tech
     *
     * @return {Boolean}
     *         - True if there is no Tech to playback this source
     *         - False otherwise
     *
     * @private
     */


    Player.prototype.src_ = function src_(source) {
      var _this9 = this;

      var sourceTech = this.selectSource([source]);

      if (!sourceTech) {
        return true;
      }

      if (!titleCaseEquals(sourceTech.tech, this.techName_)) {
        this.changingSrc_ = true;
        // load this technology with the chosen source
        this.loadTech_(sourceTech.tech, sourceTech.source);
        this.tech_.ready(function () {
          _this9.changingSrc_ = false;
        });
        return false;
      }

      // wait until the tech is ready to set the source
      // and set it synchronously if possible (#2326)
      this.ready(function () {

        // The setSource tech method was added with source handlers
        // so older techs won't support it
        // We need to check the direct prototype for the case where subclasses
        // of the tech do not support source handlers
        if (this.tech_.constructor.prototype.hasOwnProperty('setSource')) {
          this.techCall_('setSource', source);
        } else {
          this.techCall_('src', source.src);
        }

        this.changingSrc_ = false;
      }, true);

      return false;
    };

    /**
     * Begin loading the src data.
     */


    Player.prototype.load = function load() {
      this.techCall_('load');
    };

    /**
     * Reset the player. Loads the first tech in the techOrder,
     * and calls `reset` on the tech`.
     */


    Player.prototype.reset = function reset() {
      this.loadTech_(this.options_.techOrder[0], null);
      this.techCall_('reset');
    };

    /**
     * Returns all of the current source objects.
     *
     * @return {Tech~SourceObject[]}
     *         The current source objects
     */


    Player.prototype.currentSources = function currentSources() {
      var source = this.currentSource();
      var sources = [];

      // assume `{}` or `{ src }`
      if (Object.keys(source).length !== 0) {
        sources.push(source);
      }

      return this.cache_.sources || sources;
    };

    /**
     * Returns the current source object.
     *
     * @return {Tech~SourceObject}
     *         The current source object
     */


    Player.prototype.currentSource = function currentSource() {
      return this.cache_.source || {};
    };

    /**
     * Returns the fully qualified URL of the current source value e.g. http://mysite.com/video.mp4
     * Can be used in conjunction with `currentType` to assist in rebuilding the current source object.
     *
     * @return {string}
     *         The current source
     */


    Player.prototype.currentSrc = function currentSrc() {
      return this.currentSource() && this.currentSource().src || '';
    };

    /**
     * Get the current source type e.g. video/mp4
     * This can allow you rebuild the current source object so that you could load the same
     * source and tech later
     *
     * @return {string}
     *         The source MIME type
     */


    Player.prototype.currentType = function currentType() {
      return this.currentSource() && this.currentSource().type || '';
    };

    /**
     * Get or set the preload attribute
     *
     * @param {boolean} [value]
     *        - true means that we should preload
     *        - false means that we should not preload
     *
     * @return {string}
     *         The preload attribute value when getting
     */


    Player.prototype.preload = function preload(value) {
      if (value !== undefined) {
        this.techCall_('setPreload', value);
        this.options_.preload = value;
        return;
      }
      return this.techGet_('preload');
    };

    /**
     * Get or set the autoplay attribute.
     *
     * @param {boolean} [value]
     *        - true means that we should autoplay
     *        - false means that we should not autoplay
     *
     * @return {string}
     *         The current value of autoplay when getting
     */


    Player.prototype.autoplay = function autoplay(value) {
      if (value !== undefined) {
        this.techCall_('setAutoplay', value);
        this.options_.autoplay = value;
        return;
      }
      return this.techGet_('autoplay', value);
    };

    /**
     * Set or unset the playsinline attribute.
     * Playsinline tells the browser that non-fullscreen playback is preferred.
     *
     * @param {boolean} [value]
     *        - true means that we should try to playOld inline by default
     *        - false means that we should use the browser's default playback mode,
     *          which in most cases is inline. iOS Safari is a notable exception
     *          and plays fullscreen by default.
     *
     * @return {string|Player}
     *         - the current value of playsinline
     *         - the player when setting
     *
     * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}
     */


    Player.prototype.playsinline = function playsinline(value) {
      if (value !== undefined) {
        this.techCall_('setPlaysinline', value);
        this.options_.playsinline = value;
        return this;
      }
      return this.techGet_('playsinline');
    };

    /**
     * Get or set the loop attribute on the video element.
     *
     * @param {boolean} [value]
     *        - true means that we should loop the video
     *        - false means that we should not loop the video
     *
     * @return {string}
     *         The current value of loop when getting
     */


    Player.prototype.loop = function loop(value) {
      if (value !== undefined) {
        this.techCall_('setLoop', value);
        this.options_.loop = value;
        return;
      }
      return this.techGet_('loop');
    };

    /**
     * Get or set the poster image source url
     *
     * @fires Player#posterchange
     *
     * @param {string} [src]
     *        Poster image source URL
     *
     * @return {string}
     *         The current value of poster when getting
     */


    Player.prototype.poster = function poster(src) {
      if (src === undefined) {
        return this.poster_;
      }

      // The correct way to remove a poster is to set as an empty string
      // other falsey values will throw errors
      if (!src) {
        src = '';
      }

      if (src === this.poster_) {
        return;
      }

      // update the internal poster variable
      this.poster_ = src;

      // update the tech's poster
      this.techCall_('setPoster', src);

      this.isPosterFromTech_ = false;

      // alert components that the poster has been set
      /**
       * This event fires when the poster image is changed on the player.
       *
       * @event Player#posterchange
       * @type {EventTarget~Event}
       */
      this.trigger('posterchange');
    };

    /**
     * Some techs (e.g. YouTube) can provide a poster source in an
     * asynchronous way. We want the poster component to use this
     * poster source so that it covers up the tech's controls.
     * (YouTube's playOld button). However we only want to use this
     * source if the player user hasn't set a poster through
     * the normal APIs.
     *
     * @fires Player#posterchange
     * @listens Tech#posterchange
     * @private
     */


    Player.prototype.handleTechPosterChange_ = function handleTechPosterChange_() {
      if ((!this.poster_ || this.options_.techCanOverridePoster) && this.tech_ && this.tech_.poster) {
        var newPoster = this.tech_.poster() || '';

        if (newPoster !== this.poster_) {
          this.poster_ = newPoster;
          this.isPosterFromTech_ = true;

          // Let components know the poster has changed
          this.trigger('posterchange');
        }
      }
    };

    /**
     * Get or set whether or not the controls are showing.
     *
     * @fires Player#controlsenabled
     *
     * @param {boolean} [bool]
     *        - true to turn controls on
     *        - false to turn controls off
     *
     * @return {boolean}
     *         The current value of controls when getting
     */


    Player.prototype.controls = function controls(bool) {
      if (bool === undefined) {
        return !!this.controls_;
      }

      bool = !!bool;

      // Don't trigger a change event unless it actually changed
      if (this.controls_ === bool) {
        return;
      }

      this.controls_ = bool;

      if (this.usingNativeControls()) {
        this.techCall_('setControls', bool);
      }

      if (this.controls_) {
        this.removeClass('vjs-controls-disabled');
        this.addClass('vjs-controls-enabled');
        /**
         * @event Player#controlsenabled
         * @type {EventTarget~Event}
         */
        this.trigger('controlsenabled');
        if (!this.usingNativeControls()) {
          this.addTechControlsListeners_();
        }
      } else {
        this.removeClass('vjs-controls-enabled');
        this.addClass('vjs-controls-disabled');
        /**
         * @event Player#controlsdisabled
         * @type {EventTarget~Event}
         */
        this.trigger('controlsdisabled');
        if (!this.usingNativeControls()) {
          this.removeTechControlsListeners_();
        }
      }
    };

    /**
     * Toggle native controls on/off. Native controls are the controls built into
     * devices (e.g. default iPhone controls), Flash, or other techs
     * (e.g. Vimeo Controls)
     * **This should only be set by the current tech, because only the tech knows
     * if it can support native controls**
     *
     * @fires Player#usingnativecontrols
     * @fires Player#usingcustomcontrols
     *
     * @param {boolean} [bool]
     *        - true to turn native controls on
     *        - false to turn native controls off
     *
     * @return {boolean}
     *         The current value of native controls when getting
     */


    Player.prototype.usingNativeControls = function usingNativeControls(bool) {
      if (bool === undefined) {
        return !!this.usingNativeControls_;
      }

      bool = !!bool;

      // Don't trigger a change event unless it actually changed
      if (this.usingNativeControls_ === bool) {
        return;
      }

      this.usingNativeControls_ = bool;

      if (this.usingNativeControls_) {
        this.addClass('vjs-using-native-controls');

        /**
         * player is using the native device controls
         *
         * @event Player#usingnativecontrols
         * @type {EventTarget~Event}
         */
        this.trigger('usingnativecontrols');
      } else {
        this.removeClass('vjs-using-native-controls');

        /**
         * player is using the custom HTML controls
         *
         * @event Player#usingcustomcontrols
         * @type {EventTarget~Event}
         */
        this.trigger('usingcustomcontrols');
      }
    };

    /**
     * Set or get the current MediaError
     *
     * @fires Player#error
     *
     * @param  {MediaError|string|number} [err]
     *         A MediaError or a string/number to be turned
     *         into a MediaError
     *
     * @return {MediaError|null}
     *         The current MediaError when getting (or null)
     */


    Player.prototype.error = function error(err) {
      if (err === undefined) {
        return this.error_ || null;
      }

      // restoring to default
      if (err === null) {
        this.error_ = err;
        this.removeClass('vjs-error');
        if (this.errorDisplay) {
          this.errorDisplay.close();
        }
        return;
      }

      this.error_ = new MediaError(err);

      // add the vjs-error classname to the player
      this.addClass('vjs-error');

      // log the name of the error type and any message
      // IE11 logs "[object object]" and required you to expand message to see error object
      log$1.error('(CODE:' + this.error_.code + ' ' + MediaError.errorTypes[this.error_.code] + ')', this.error_.message, this.error_);

      /**
       * @event Player#error
       * @type {EventTarget~Event}
       */
      this.trigger('error');

      return;
    };

    /**
     * Report user activity
     *
     * @param {Object} event
     *        Event object
     */


    Player.prototype.reportUserActivity = function reportUserActivity(event) {
      this.userActivity_ = true;
    };

    /**
     * Get/set if user is active
     *
     * @fires Player#useractive
     * @fires Player#userinactive
     *
     * @param {boolean} [bool]
     *        - true if the user is active
     *        - false if the user is inactive
     *
     * @return {boolean}
     *         The current value of userActive when getting
     */


    Player.prototype.userActive = function userActive(bool) {
      if (bool === undefined) {
        return this.userActive_;
      }

      bool = !!bool;

      if (bool === this.userActive_) {
        return;
      }

      this.userActive_ = bool;

      if (this.userActive_) {
        this.userActivity_ = true;
        this.removeClass('vjs-user-inactive');
        this.addClass('vjs-user-active');
        /**
         * @event Player#useractive
         * @type {EventTarget~Event}
         */
        this.trigger('useractive');
        return;
      }

      // Chrome/Safari/IE have bugs where when you change the cursor it can
      // trigger a mousemove event. This causes an issue when you're hiding
      // the cursor when the user is inactive, and a mousemove signals user
      // activity. Making it impossible to go into inactive mode. Specifically
      // this happens in fullscreen when we really need to hide the cursor.
      //
      // When this gets resolved in ALL browsers it can be removed
      // https://code.google.com/p/chromium/issues/detail?id=103041
      if (this.tech_) {
        this.tech_.one('mousemove', function (e) {
          e.stopPropagation();
          e.preventDefault();
        });
      }

      this.userActivity_ = false;
      this.removeClass('vjs-user-active');
      this.addClass('vjs-user-inactive');
      /**
       * @event Player#userinactive
       * @type {EventTarget~Event}
       */
      this.trigger('userinactive');
    };

    /**
     * Listen for user activity based on timeout value
     *
     * @private
     */


    Player.prototype.listenForUserActivity_ = function listenForUserActivity_() {
      var mouseInProgress = void 0;
      var lastMoveX = void 0;
      var lastMoveY = void 0;
      var handleActivity = bind(this, this.reportUserActivity);

      var handleMouseMove = function handleMouseMove(e) {
        // #1068 - Prevent mousemove spamming
        // Chrome Bug: https://code.google.com/p/chromium/issues/detail?id=366970
        if (e.screenX !== lastMoveX || e.screenY !== lastMoveY) {
          lastMoveX = e.screenX;
          lastMoveY = e.screenY;
          handleActivity();
        }
      };

      var handleMouseDown = function handleMouseDown() {
        handleActivity();
        // For as long as the they are touching the device or have their mouse down,
        // we consider them active even if they're not moving their finger or mouse.
        // So we want to continue to update that they are active
        this.clearInterval(mouseInProgress);
        // Setting userActivity=true now and setting the interval to the same time
        // as the activityCheck interval (250) should ensure we never miss the
        // next activityCheck
        mouseInProgress = this.setInterval(handleActivity, 250);
      };

      var handleMouseUp = function handleMouseUp(event) {
        handleActivity();
        // Stop the interval that maintains activity if the mouse/touch is down
        this.clearInterval(mouseInProgress);
      };

      // Any mouse movement will be considered user activity
      this.on('mousedown', handleMouseDown);
      this.on('mousemove', handleMouseMove);
      this.on('mouseup', handleMouseUp);

      // Listen for keyboard navigation
      // Shouldn't need to use inProgress interval because of key repeat
      this.on('keydown', handleActivity);
      this.on('keyup', handleActivity);

      // Run an interval every 250 milliseconds instead of stuffing everything into
      // the mousemove/touchmove function itself, to prevent performance degradation.
      // `this.reportUserActivity` simply sets this.userActivity_ to true, which
      // then gets picked up by this loop
      // http://ejohn.org/blog/learning-from-twitter/
      var inactivityTimeout = void 0;

      this.setInterval(function () {
        // Check to see if mouse/touch activity has happened
        if (!this.userActivity_) {
          return;
        }

        // Reset the activity tracker
        this.userActivity_ = false;

        // If the user state was inactive, set the state to active
        this.userActive(true);

        // Clear any existing inactivity timeout to start the timer over
        this.clearTimeout(inactivityTimeout);

        var timeout = this.options_.inactivityTimeout;

        if (timeout <= 0) {
          return;
        }

        // In <timeout> milliseconds, if no more activity has occurred the
        // user will be considered inactive
        inactivityTimeout = this.setTimeout(function () {
          // Protect against the case where the inactivityTimeout can trigger just
          // before the next user activity is picked up by the activity check loop
          // causing a flicker
          if (!this.userActivity_) {
            this.userActive(false);
          }
        }, timeout);
      }, 250);
    };

    /**
     * Gets or sets the current playback rate. A playback rate of
     * 1.0 represents normal speed and 0.5 would indicate half-speed
     * playback, for instance.
     *
     * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-playbackrate
     *
     * @param {number} [rate]
     *       New playback rate to set.
     *
     * @return {number}
     *         The current playback rate when getting or 1.0
     */


    Player.prototype.playbackRate = function playbackRate(rate) {
      if (rate !== undefined) {
        // NOTE: this.cache_.lastPlaybackRate is set from the tech handler
        // that is registered above
        this.techCall_('setPlaybackRate', rate);
        return;
      }

      if (this.tech_ && this.tech_.featuresPlaybackRate) {
        return this.cache_.lastPlaybackRate || this.techGet_('playbackRate');
      }
      return 1.0;
    };

    /**
     * Gets or sets the current default playback rate. A default playback rate of
     * 1.0 represents normal speed and 0.5 would indicate half-speed playback, for instance.
     * defaultPlaybackRate will only represent what the initial playbackRate of a video was, not
     * not the current playbackRate.
     *
     * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-defaultplaybackrate
     *
     * @param {number} [rate]
     *       New default playback rate to set.
     *
     * @return {number|Player}
     *         - The default playback rate when getting or 1.0
     *         - the player when setting
     */


    Player.prototype.defaultPlaybackRate = function defaultPlaybackRate(rate) {
      if (rate !== undefined) {
        return this.techCall_('setDefaultPlaybackRate', rate);
      }

      if (this.tech_ && this.tech_.featuresPlaybackRate) {
        return this.techGet_('defaultPlaybackRate');
      }
      return 1.0;
    };

    /**
     * Gets or sets the audio flag
     *
     * @param {boolean} bool
     *        - true signals that this is an audio player
     *        - false signals that this is not an audio player
     *
     * @return {boolean}
     *         The current value of isAudio when getting
     */


    Player.prototype.isAudio = function isAudio(bool) {
      if (bool !== undefined) {
        this.isAudio_ = !!bool;
        return;
      }

      return !!this.isAudio_;
    };

    /**
     * A helper method for adding a {@link TextTrack} to our
     * {@link TextTrackList}.
     *
     * In addition to the W3C settings we allow adding additional info through options.
     *
     * @see http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-addtexttrack
     *
     * @param {string} [kind]
     *        the kind of TextTrack you are adding
     *
     * @param {string} [label]
     *        the label to give the TextTrack label
     *
     * @param {string} [language]
     *        the language to set on the TextTrack
     *
     * @return {TextTrack|undefined}
     *         the TextTrack that was added or undefined
     *         if there is no tech
     */


    Player.prototype.addTextTrack = function addTextTrack(kind, label, language) {
      if (this.tech_) {
        return this.tech_.addTextTrack(kind, label, language);
      }
    };

    /**
     * Create a remote {@link TextTrack} and an {@link HTMLTrackElement}. It will
     * automatically removed from the video element whenever the source changes, unless
     * manualCleanup is set to false.
     *
     * @param {Object} options
     *        Options to pass to {@link HTMLTrackElement} during creation. See
     *        {@link HTMLTrackElement} for object properties that you should use.
     *
     * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be
     *
     * @return {HtmlTrackElement}
     *         the HTMLTrackElement that was created and added
     *         to the HtmlTrackElementList and the remote
     *         TextTrackList
     *
     * @deprecated The default value of the "manualCleanup" parameter will default
     *             to "false" in upcoming versions of Video.js
     */


    Player.prototype.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {
      if (this.tech_) {
        return this.tech_.addRemoteTextTrack(options, manualCleanup);
      }
    };

    /**
     * Remove a remote {@link TextTrack} from the respective
     * {@link TextTrackList} and {@link HtmlTrackElementList}.
     *
     * @param {Object} track
     *        Remote {@link TextTrack} to remove
     *
     * @return {undefined}
     *         does not return anything
     */


    Player.prototype.removeRemoteTextTrack = function removeRemoteTextTrack() {
      var _ref3 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
        _ref3$track = _ref3.track,
        track = _ref3$track === undefined ? arguments[0] : _ref3$track;

      // destructure the input into an object with a track argument, defaulting to arguments[0]
      // default the whole argument to an empty object if nothing was passed in

      if (this.tech_) {
        return this.tech_.removeRemoteTextTrack(track);
      }
    };

    /**
     * Gets available media playback quality metrics as specified by the W3C's Media
     * Playback Quality API.
     *
     * @see [Spec]{@link https://wicg.github.io/media-playback-quality}
     *
     * @return {Object|undefined}
     *         An object with supported media playback quality metrics or undefined if there
     *         is no tech or the tech does not support it.
     */


    Player.prototype.getVideoPlaybackQuality = function getVideoPlaybackQuality() {
      return this.techGet_('getVideoPlaybackQuality');
    };

    /**
     * Get video width
     *
     * @return {number}
     *         current video width
     */


    Player.prototype.videoWidth = function videoWidth() {
      return this.tech_ && this.tech_.videoWidth && this.tech_.videoWidth() || 0;
    };

    /**
     * Get video height
     *
     * @return {number}
     *         current video height
     */


    Player.prototype.videoHeight = function videoHeight() {
      return this.tech_ && this.tech_.videoHeight && this.tech_.videoHeight() || 0;
    };

    /**
     * The player's language code
     * NOTE: The language should be set in the player options if you want the
     * the controls to be built with a specific language. Changing the language
     * later will not update controls text.
     *
     * @param {string} [code]
     *        the language code to set the player to
     *
     * @return {string}
     *         The current language code when getting
     */


    Player.prototype.language = function language(code) {
      if (code === undefined) {
        return this.language_;
      }

      this.language_ = String(code).toLowerCase();
    };

    /**
     * Get the player's language dictionary
     * Merge every time, because a newly added plugin might call videojs.addLanguage() at any time
     * Languages specified directly in the player options have precedence
     *
     * @return {Array}
     *         An array of of supported languages
     */


    Player.prototype.languages = function languages() {
      return mergeOptions(Player.prototype.options_.languages, this.languages_);
    };

    /**
     * returns a JavaScript object reperesenting the current track
     * information. **DOES not return it as JSON**
     *
     * @return {Object}
     *         Object representing the current of track info
     */


    Player.prototype.toJSON = function toJSON() {
      var options = mergeOptions(this.options_);
      var tracks = options.tracks;

      options.tracks = [];

      for (var i = 0; i < tracks.length; i++) {
        var track = tracks[i];

        // deep merge tracks and null out player so no circular references
        track = mergeOptions(track);
        track.player = undefined;
        options.tracks[i] = track;
      }

      return options;
    };

    /**
     * Creates a simple modal dialog (an instance of the {@link ModalDialog}
     * component) that immediately overlays the player with arbitrary
     * content and removes itself when closed.
     *
     * @param {string|Function|Element|Array|null} content
     *        Same as {@link ModalDialog#content}'s param of the same name.
     *        The most straight-forward usage is to provide a string or DOM
     *        element.
     *
     * @param {Object} [options]
     *        Extra options which will be passed on to the {@link ModalDialog}.
     *
     * @return {ModalDialog}
     *         the {@link ModalDialog} that was created
     */


    Player.prototype.createModal = function createModal(content, options) {
      var _this10 = this;

      options = options || {};
      options.content = content || '';

      var modal = new ModalDialog(this, options);

      this.addChild(modal);
      modal.on('dispose', function () {
        _this10.removeChild(modal);
      });

      modal.open();
      return modal;
    };

    /**
     * Gets tag settings
     *
     * @param {Element} tag
     *        The player tag
     *
     * @return {Object}
     *         An object containing all of the settings
     *         for a player tag
     */


    Player.getTagSettings = function getTagSettings(tag) {
      var baseOptions = {
        sources: [],
        tracks: []
      };

      var tagOptions = getAttributes(tag);
      var dataSetup = tagOptions['data-setup'];

      if (hasClass(tag, 'vjs-fluid')) {
        tagOptions.fluid = true;
      }

      // Check if data-setup attr exists.
      if (dataSetup !== null) {
        // Parse options JSON
        // If empty string, make it a parsable json object.
        var _safeParseTuple = tuple(dataSetup || '{}'),
          err = _safeParseTuple[0],
          data = _safeParseTuple[1];

        if (err) {
          log$1.error(err);
        }
        assign(tagOptions, data);
      }

      assign(baseOptions, tagOptions);

      // Get tag children settings
      if (tag.hasChildNodes()) {
        var children = tag.childNodes;

        for (var i = 0, j = children.length; i < j; i++) {
          var child = children[i];
          // Change case needed: http://ejohn.org/blog/nodename-case-sensitivity/
          var childName = child.nodeName.toLowerCase();

          if (childName === 'source') {
            baseOptions.sources.push(getAttributes(child));
          } else if (childName === 'track') {
            baseOptions.tracks.push(getAttributes(child));
          }
        }
      }

      return baseOptions;
    };

    /**
     * Determine whether or not flexbox is supported
     *
     * @return {boolean}
     *         - true if flexbox is supported
     *         - false if flexbox is not supported
     */


    Player.prototype.flexNotSupported_ = function flexNotSupported_() {
      var elem = document_1.createElement('i');

      // Note: We don't actually use flexBasis (or flexOrder), but it's one of the more
      // common flex features that we can rely on when checking for flex support.
      return !('flexBasis' in elem.style || 'webkitFlexBasis' in elem.style || 'mozFlexBasis' in elem.style || 'msFlexBasis' in elem.style ||
        // IE10-specific (2012 flex spec), available for completeness
        'msFlexOrder' in elem.style);
    };

    return Player;
  }(Component);

  /**
   * Get the {@link VideoTrackList}
   * @link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist
   *
   * @return {VideoTrackList}
   *         the current video track list
   *
   * @method Player.prototype.videoTracks
   */

  /**
   * Get the {@link AudioTrackList}
   * @link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist
   *
   * @return {AudioTrackList}
   *         the current audio track list
   *
   * @method Player.prototype.audioTracks
   */

  /**
   * Get the {@link TextTrackList}
   *
   * @link http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-texttracks
   *
   * @return {TextTrackList}
   *         the current text track list
   *
   * @method Player.prototype.textTracks
   */

  /**
   * Get the remote {@link TextTrackList}
   *
   * @return {TextTrackList}
   *         The current remote text track list
   *
   * @method Player.prototype.remoteTextTracks
   */

  /**
   * Get the remote {@link HtmlTrackElementList} tracks.
   *
   * @return {HtmlTrackElementList}
   *         The current remote text track element list
   *
   * @method Player.prototype.remoteTextTrackEls
   */

  ALL.names.forEach(function (name$$1) {
    var props = ALL[name$$1];

    Player.prototype[props.getterName] = function () {
      if (this.tech_) {
        return this.tech_[props.getterName]();
      }

      // if we have not yet loadTech_, we create {video,audio,text}Tracks_
      // these will be passed to the tech during loading
      this[props.privateName] = this[props.privateName] || new props.ListClass();
      return this[props.privateName];
    };
  });

  /**
   * Global player list
   *
   * @type {Object}
   */
  Player.players = {};

  var navigator = window_1.navigator;

  /*
   * Player instance options, surfaced using options
   * options = Player.prototype.options_
   * Make changes in options, not here.
   *
   * @type {Object}
   * @private
   */
  Player.prototype.options_ = {
    // Default order of fallback technology
    techOrder: Tech.defaultTechOrder_,

    html5: {},
    flash: {},

    // default inactivity timeout
    inactivityTimeout: 2000,

    // default playback rates
    playbackRates: [],
    // Add playback rate selection by adding rates
    // 'playbackRates': [0.5, 1, 1.5, 2],

    // Included control sets
    children: ['mediaLoader', 'posterImage', 'textTrackDisplay', 'loadingSpinner', 'bigPlayButton', 'controlBar', 'errorDisplay', 'textTrackSettings', 'resizeManager'],

    language: navigator && (navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language) || 'en',

    // locales and their language translations
    languages: {},

    // Default message to show when a video cannot be played.
    notSupportedMessage: 'No compatible source was found for this media.'
  };

  [
    /**
     * Returns whether or not the player is in the "ended" state.
     *
     * @return {Boolean} True if the player is in the ended state, false if not.
     * @method Player#ended
     */
    'ended',
    /**
     * Returns whether or not the player is in the "seeking" state.
     *
     * @return {Boolean} True if the player is in the seeking state, false if not.
     * @method Player#seeking
     */
    'seeking',
    /**
     * Returns the TimeRanges of the media that are currently available
     * for seeking to.
     *
     * @return {TimeRanges} the seekable intervals of the media timeline
     * @method Player#seekable
     */
    'seekable',
    /**
     * Returns the current state of network activity for the element, from
     * the codes in the list below.
     * - NETWORK_EMPTY (numeric value 0)
     *   The element has not yet been initialised. All attributes are in
     *   their initial states.
     * - NETWORK_IDLE (numeric value 1)
     *   The element's resource selection algorithm is active and has
     *   selected a resource, but it is not actually using the network at
     *   this time.
     * - NETWORK_LOADING (numeric value 2)
     *   The user agent is actively trying to download data.
     * - NETWORK_NO_SOURCE (numeric value 3)
     *   The element's resource selection algorithm is active, but it has
     *   not yet found a resource to use.
     *
     * @see https://html.spec.whatwg.org/multipage/embedded-content.html#network-states
     * @return {number} the current network activity state
     * @method Player#networkState
     */
    'networkState',
    /**
     * Returns a value that expresses the current state of the element
     * with respect to rendering the current playback position, from the
     * codes in the list below.
     * - HAVE_NOTHING (numeric value 0)
     *   No information regarding the media resource is available.
     * - HAVE_METADATA (numeric value 1)
     *   Enough of the resource has been obtained that the duration of the
     *   resource is available.
     * - HAVE_CURRENT_DATA (numeric value 2)
     *   Data for the immediate current playback position is available.
     * - HAVE_FUTURE_DATA (numeric value 3)
     *   Data for the immediate current playback position is available, as
     *   well as enough data for the user agent to advance the current
     *   playback position in the direction of playback.
     * - HAVE_ENOUGH_DATA (numeric value 4)
     *   The user agent estimates that enough data is available for
     *   playback to proceed uninterrupted.
     *
     * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-readystate
     * @return {number} the current playback rendering state
     * @method Player#readyState
     */
    'readyState'].forEach(function (fn) {
    Player.prototype[fn] = function () {
      return this.techGet_(fn);
    };
  });

  TECH_EVENTS_RETRIGGER.forEach(function (event) {
    Player.prototype['handleTech' + toTitleCase(event) + '_'] = function () {
      return this.trigger(event);
    };
  });

  /**
   * Fired when the player has initial duration and dimension information
   *
   * @event Player#loadedmetadata
   * @type {EventTarget~Event}
   */

  /**
   * Fired when the player has downloaded data at the current playback position
   *
   * @event Player#loadeddata
   * @type {EventTarget~Event}
   */

  /**
   * Fired when the current playback position has changed *
   * During playback this is fired every 15-250 milliseconds, depending on the
   * playback technology in use.
   *
   * @event Player#timeupdate
   * @type {EventTarget~Event}
   */

  /**
   * Fired when the volume changes
   *
   * @event Player#volumechange
   * @type {EventTarget~Event}
   */

  /**
   * Reports whether or not a player has a plugin available.
   *
   * This does not report whether or not the plugin has ever been initialized
   * on this player. For that, [usingPlugin]{@link Player#usingPlugin}.
   *
   * @method Player#hasPlugin
   * @param  {string}  name
   *         The name of a plugin.
   *
   * @return {boolean}
   *         Whether or not this player has the requested plugin available.
   */

  /**
   * Reports whether or not a player is using a plugin by name.
   *
   * For basic plugins, this only reports whether the plugin has _ever_ been
   * initialized on this player.
   *
   * @method Player#usingPlugin
   * @param  {string} name
   *         The name of a plugin.
   *
   * @return {boolean}
   *         Whether or not this player is using the requested plugin.
   */

  Component.registerComponent('Player', Player);

  /**
   * @file plugin.js
   */

  /**
   * The base plugin name.
   *
   * @private
   * @constant
   * @type {string}
   */
  var BASE_PLUGIN_NAME = 'plugin';

  /**
   * The key on which a player's active plugins cache is stored.
   *
   * @private
   * @constant
   * @type     {string}
   */
  var PLUGIN_CACHE_KEY = 'activePlugins_';

  /**
   * Stores registered plugins in a private space.
   *
   * @private
   * @type    {Object}
   */
  var pluginStorage = {};

  /**
   * Reports whether or not a plugin has been registered.
   *
   * @private
   * @param   {string} name
   *          The name of a plugin.
   *
   * @returns {boolean}
   *          Whether or not the plugin has been registered.
   */
  var pluginExists = function pluginExists(name) {
    return pluginStorage.hasOwnProperty(name);
  };

  /**
   * Get a single registered plugin by name.
   *
   * @private
   * @param   {string} name
   *          The name of a plugin.
   *
   * @returns {Function|undefined}
   *          The plugin (or undefined).
   */
  var getPlugin = function getPlugin(name) {
    return pluginExists(name) ? pluginStorage[name] : undefined;
  };

  /**
   * Marks a plugin as "active" on a player.
   *
   * Also, ensures that the player has an object for tracking active plugins.
   *
   * @private
   * @param   {Player} player
   *          A Video.js player instance.
   *
   * @param   {string} name
   *          The name of a plugin.
   */
  var markPluginAsActive = function markPluginAsActive(player, name) {
    player[PLUGIN_CACHE_KEY] = player[PLUGIN_CACHE_KEY] || {};
    player[PLUGIN_CACHE_KEY][name] = true;
  };

  /**
   * Triggers a pair of plugin setup events.
   *
   * @private
   * @param  {Player} player
   *         A Video.js player instance.
   *
   * @param  {Plugin~PluginEventHash} hash
   *         A plugin event hash.
   *
   * @param  {Boolean} [before]
   *         If true, prefixes the event name with "before". In other words,
   *         use this to trigger "beforepluginsetup" instead of "pluginsetup".
   */
  var triggerSetupEvent = function triggerSetupEvent(player, hash, before) {
    var eventName = (before ? 'before' : '') + 'pluginsetup';

    player.trigger(eventName, hash);
    player.trigger(eventName + ':' + hash.name, hash);
  };

  /**
   * Takes a basic plugin function and returns a wrapper function which marks
   * on the player that the plugin has been activated.
   *
   * @private
   * @param   {string} name
   *          The name of the plugin.
   *
   * @param   {Function} plugin
   *          The basic plugin.
   *
   * @returns {Function}
   *          A wrapper function for the given plugin.
   */
  var createBasicPlugin = function createBasicPlugin(name, plugin) {
    var basicPluginWrapper = function basicPluginWrapper() {

      // We trigger the "beforepluginsetup" and "pluginsetup" events on the player
      // regardless, but we want the hash to be consistent with the hash provided
      // for advanced plugins.
      //
      // The only potentially counter-intuitive thing here is the `instance` in
      // the "pluginsetup" event is the value returned by the `plugin` function.
      triggerSetupEvent(this, {name: name, plugin: plugin, instance: null}, true);

      var instance = plugin.apply(this, arguments);

      markPluginAsActive(this, name);
      triggerSetupEvent(this, {name: name, plugin: plugin, instance: instance});

      return instance;
    };

    Object.keys(plugin).forEach(function (prop) {
      basicPluginWrapper[prop] = plugin[prop];
    });

    return basicPluginWrapper;
  };

  /**
   * Takes a plugin sub-class and returns a factory function for generating
   * instances of it.
   *
   * This factory function will replace itself with an instance of the requested
   * sub-class of Plugin.
   *
   * @private
   * @param   {string} name
   *          The name of the plugin.
   *
   * @param   {Plugin} PluginSubClass
   *          The advanced plugin.
   *
   * @returns {Function}
   */
  var createPluginFactory = function createPluginFactory(name, PluginSubClass) {

    // Add a `name` property to the plugin prototype so that each plugin can
    // refer to itself by name.
    PluginSubClass.prototype.name = name;

    return function () {
      triggerSetupEvent(this, {name: name, plugin: PluginSubClass, instance: null}, true);

      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
        args[_key] = arguments[_key];
      }

      var instance = new (Function.prototype.bind.apply(PluginSubClass, [null].concat([this].concat(args))))();

      // The plugin is replaced by a function that returns the current instance.
      this[name] = function () {
        return instance;
      };

      triggerSetupEvent(this, instance.getEventHash());

      return instance;
    };
  };

  /**
   * Parent class for all advanced plugins.
   *
   * @mixes   module:evented~EventedMixin
   * @mixes   module:stateful~StatefulMixin
   * @fires   Player#beforepluginsetup
   * @fires   Player#beforepluginsetup:$name
   * @fires   Player#pluginsetup
   * @fires   Player#pluginsetup:$name
   * @listens Player#dispose
   * @throws  {Error}
   *          If attempting to instantiate the base {@link Plugin} class
   *          directly instead of via a sub-class.
   */

  var Plugin = function () {

    /**
     * Creates an instance of this class.
     *
     * Sub-classes should call `super` to ensure plugins are properly initialized.
     *
     * @param {Player} player
     *        A Video.js player instance.
     */
    function Plugin(player) {
      classCallCheck(this, Plugin);

      if (this.constructor === Plugin) {
        throw new Error('Plugin must be sub-classed; not directly instantiated.');
      }

      this.player = player;

      // Make this object evented, but remove the added `trigger` method so we
      // use the prototype version instead.
      evented(this);
      delete this.trigger;

      stateful(this, this.constructor.defaultState);
      markPluginAsActive(player, this.name);

      // Auto-bind the dispose method so we can use it as a listener and unbind
      // it later easily.
      this.dispose = bind(this, this.dispose);

      // If the player is disposed, dispose the plugin.
      player.on('dispose', this.dispose);
    }

    /**
     * Get the version of the plugin that was set on <pluginName>.VERSION
     */


    Plugin.prototype.version = function version() {
      return this.constructor.VERSION;
    };

    /**
     * Each event triggered by plugins includes a hash of additional data with
     * conventional properties.
     *
     * This returns that object or mutates an existing hash.
     *
     * @param   {Object} [hash={}]
     *          An object to be used as event an event hash.
     *
     * @returns {Plugin~PluginEventHash}
     *          An event hash object with provided properties mixed-in.
     */


    Plugin.prototype.getEventHash = function getEventHash() {
      var hash = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

      hash.name = this.name;
      hash.plugin = this.constructor;
      hash.instance = this;
      return hash;
    };

    /**
     * Triggers an event on the plugin object and overrides
     * {@link module:evented~EventedMixin.trigger|EventedMixin.trigger}.
     *
     * @param   {string|Object} event
     *          An event type or an object with a type property.
     *
     * @param   {Object} [hash={}]
     *          Additional data hash to merge with a
     *          {@link Plugin~PluginEventHash|PluginEventHash}.
     *
     * @returns {boolean}
     *          Whether or not default was prevented.
     */


    Plugin.prototype.trigger = function trigger$$1(event) {
      var hash = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

      return trigger(this.eventBusEl_, event, this.getEventHash(hash));
    };

    /**
     * Handles "statechanged" events on the plugin. No-op by default, override by
     * subclassing.
     *
     * @abstract
     * @param    {Event} e
     *           An event object provided by a "statechanged" event.
     *
     * @param    {Object} e.changes
     *           An object describing changes that occurred with the "statechanged"
     *           event.
     */


    Plugin.prototype.handleStateChanged = function handleStateChanged(e) {
    };

    /**
     * Disposes a plugin.
     *
     * Subclasses can override this if they want, but for the sake of safety,
     * it's probably best to subscribe the "dispose" event.
     *
     * @fires Plugin#dispose
     */


    Plugin.prototype.dispose = function dispose() {
      var name = this.name,
        player = this.player;

      /**
       * Signals that a advanced plugin is about to be disposed.
       *
       * @event Plugin#dispose
       * @type  {EventTarget~Event}
       */

      this.trigger('dispose');
      this.off();
      player.off('dispose', this.dispose);

      // Eliminate any possible sources of leaking memory by clearing up
      // references between the player and the plugin instance and nulling out
      // the plugin's state and replacing methods with a function that throws.
      player[PLUGIN_CACHE_KEY][name] = false;
      this.player = this.state = null;

      // Finally, replace the plugin name on the player with a new factory
      // function, so that the plugin is ready to be set up again.
      player[name] = createPluginFactory(name, pluginStorage[name]);
    };

    /**
     * Determines if a plugin is a basic plugin (i.e. not a sub-class of `Plugin`).
     *
     * @param   {string|Function} plugin
     *          If a string, matches the name of a plugin. If a function, will be
     *          tested directly.
     *
     * @returns {boolean}
     *          Whether or not a plugin is a basic plugin.
     */


    Plugin.isBasic = function isBasic(plugin) {
      var p = typeof plugin === 'string' ? getPlugin(plugin) : plugin;

      return typeof p === 'function' && !Plugin.prototype.isPrototypeOf(p.prototype);
    };

    /**
     * Register a Video.js plugin.
     *
     * @param   {string} name
     *          The name of the plugin to be registered. Must be a string and
     *          must not match an existing plugin or a method on the `Player`
     *          prototype.
     *
     * @param   {Function} plugin
     *          A sub-class of `Plugin` or a function for basic plugins.
     *
     * @returns {Function}
     *          For advanced plugins, a factory function for that plugin. For
     *          basic plugins, a wrapper function that initializes the plugin.
     */


    Plugin.registerPlugin = function registerPlugin(name, plugin) {
      if (typeof name !== 'string') {
        throw new Error('Illegal plugin name, "' + name + '", must be a string, was ' + (typeof name === 'undefined' ? 'undefined' : _typeof(name)) + '.');
      }

      if (pluginExists(name)) {
        log$1.warn('A plugin named "' + name + '" already exists. You may want to avoid re-registering plugins!');
      } else if (Player.prototype.hasOwnProperty(name)) {
        throw new Error('Illegal plugin name, "' + name + '", cannot share a name with an existing player method!');
      }

      if (typeof plugin !== 'function') {
        throw new Error('Illegal plugin for "' + name + '", must be a function, was ' + (typeof plugin === 'undefined' ? 'undefined' : _typeof(plugin)) + '.');
      }

      pluginStorage[name] = plugin;

      // Add a player prototype method for all sub-classed plugins (but not for
      // the base Plugin class).
      if (name !== BASE_PLUGIN_NAME) {
        if (Plugin.isBasic(plugin)) {
          Player.prototype[name] = createBasicPlugin(name, plugin);
        } else {
          Player.prototype[name] = createPluginFactory(name, plugin);
        }
      }

      return plugin;
    };

    /**
     * De-register a Video.js plugin.
     *
     * @param {string} name
     *        The name of the plugin to be deregistered.
     */


    Plugin.deregisterPlugin = function deregisterPlugin(name) {
      if (name === BASE_PLUGIN_NAME) {
        throw new Error('Cannot de-register base plugin.');
      }
      if (pluginExists(name)) {
        delete pluginStorage[name];
        delete Player.prototype[name];
      }
    };

    /**
     * Gets an object containing multiple Video.js plugins.
     *
     * @param   {Array} [names]
     *          If provided, should be an array of plugin names. Defaults to _all_
     *          plugin names.
     *
     * @returns {Object|undefined}
     *          An object containing plugin(s) associated with their name(s) or
     *          `undefined` if no matching plugins exist).
     */


    Plugin.getPlugins = function getPlugins() {
      var names = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : Object.keys(pluginStorage);

      var result = void 0;

      names.forEach(function (name) {
        var plugin = getPlugin(name);

        if (plugin) {
          result = result || {};
          result[name] = plugin;
        }
      });

      return result;
    };

    /**
     * Gets a plugin's version, if available
     *
     * @param   {string} name
     *          The name of a plugin.
     *
     * @returns {string}
     *          The plugin's version or an empty string.
     */


    Plugin.getPluginVersion = function getPluginVersion(name) {
      var plugin = getPlugin(name);

      return plugin && plugin.VERSION || '';
    };

    return Plugin;
  }();

  /**
   * Gets a plugin by name if it exists.
   *
   * @static
   * @method   getPlugin
   * @memberOf Plugin
   * @param    {string} name
   *           The name of a plugin.
   *
   * @returns  {Function|undefined}
   *           The plugin (or `undefined`).
   */


  Plugin.getPlugin = getPlugin;

  /**
   * The name of the base plugin class as it is registered.
   *
   * @type {string}
   */
  Plugin.BASE_PLUGIN_NAME = BASE_PLUGIN_NAME;

  Plugin.registerPlugin(BASE_PLUGIN_NAME, Plugin);

  /**
   * Documented in player.js
   *
   * @ignore
   */
  Player.prototype.usingPlugin = function (name) {
    return !!this[PLUGIN_CACHE_KEY] && this[PLUGIN_CACHE_KEY][name] === true;
  };

  /**
   * Documented in player.js
   *
   * @ignore
   */
  Player.prototype.hasPlugin = function (name) {
    return !!pluginExists(name);
  };

  /**
   * @file extend.js
   * @module extend
   */

  /**
   * A combination of node inherits and babel's inherits (after transpile).
   * Both work the same but node adds `super_` to the subClass
   * and Bable adds the superClass as __proto__. Both seem useful.
   *
   * @param {Object} subClass
   *        The class to inherit to
   *
   * @param {Object} superClass
   *        The class to inherit from
   *
   * @private
   */
  var _inherits = function _inherits(subClass, superClass) {
    if (typeof superClass !== 'function' && superClass !== null) {
      throw new TypeError('Super expression must either be null or a function, not ' + (typeof superClass === 'undefined' ? 'undefined' : _typeof(superClass)));
    }

    subClass.prototype = Object.create(superClass && superClass.prototype, {
      constructor: {
        value: subClass,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });

    if (superClass) {
      // node
      subClass.super_ = superClass;
    }
  };

  /**
   * Function for subclassing using the same inheritance that
   * videojs uses internally
   *
   * @static
   * @const
   *
   * @param {Object} superClass
   *        The class to inherit from
   *
   * @param {Object} [subClassMethods={}]
   *        The class to inherit to
   *
   * @return {Object}
   *         The new object with subClassMethods that inherited superClass.
   */
  var extendFn = function extendFn(superClass) {
    var subClassMethods = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

    var subClass = function subClass() {
      superClass.apply(this, arguments);
    };

    var methods = {};

    if ((typeof subClassMethods === 'undefined' ? 'undefined' : _typeof(subClassMethods)) === 'object') {
      if (subClassMethods.constructor !== Object.prototype.constructor) {
        subClass = subClassMethods.constructor;
      }
      methods = subClassMethods;
    } else if (typeof subClassMethods === 'function') {
      subClass = subClassMethods;
    }

    _inherits(subClass, superClass);

    // Extend subObj's prototype with functions and other properties from props
    for (var name in methods) {
      if (methods.hasOwnProperty(name)) {
        subClass.prototype[name] = methods[name];
      }
    }

    return subClass;
  };

  /**
   * @file video.js
   * @module videojs
   */

  /**
   * Normalize an `id` value by trimming off a leading `#`
   *
   * @param   {string} id
   *          A string, maybe with a leading `#`.
   *
   * @returns {string}
   *          The string, without any leading `#`.
   */
  var normalizeId = function normalizeId(id) {
    return id.indexOf('#') === 0 ? id.slice(1) : id;
  };

  /**
   * Doubles as the main function for users to create a player instance and also
   * the main library object.
   * The `videojs` function can be used to initialize or retrieve a player.
   *
   * @param {string|Element} id
   *        Video element or video element ID
   *
   * @param {Object} [options]
   *        Optional options object for config/settings
   *
   * @param {Component~ReadyCallback} [ready]
   *        Optional ready callback
   *
   * @return {Player}
   *         A player instance
   */
  function videojs$1(id, options, ready) {
    var player = videojs$1.getPlayer(id);

    if (player) {
      if (options) {
        log$1.warn('Player "' + id + '" is already initialised. Options will not be applied.');
      }
      if (ready) {
        player.ready(ready);
      }
      return player;
    }

    var el = typeof id === 'string' ? $('#' + normalizeId(id)) : id;

    if (!isEl(el)) {
      throw new TypeError('The element or ID supplied is not valid. (videojs)');
    }

    if (!document_1.body.contains(el)) {
      log$1.warn('The element supplied is not included in the DOM');
    }

    options = options || {};

    videojs$1.hooks('beforesetup').forEach(function (hookFunction) {
      var opts = hookFunction(el, mergeOptions(options));

      if (!isObject(opts) || Array.isArray(opts)) {
        log$1.error('please return an object in beforesetup hooks');
        return;
      }

      options = mergeOptions(options, opts);
    });

    // We get the current "Player" component here in case an integration has
    // replaced it with a custom player.
    var PlayerComponent = Component.getComponent('Player');

    player = new PlayerComponent(el, options, ready);

    videojs$1.hooks('setup').forEach(function (hookFunction) {
      return hookFunction(player);
    });

    return player;
  }

  /**
   * An Object that contains lifecycle hooks as keys which point to an array
   * of functions that are run when a lifecycle is triggered
   */
  videojs$1.hooks_ = {};

  /**
   * Get a list of hooks for a specific lifecycle
   * @function videojs.hooks
   *
   * @param {string} type
   *        the lifecyle to get hooks from
   *
   * @param {Function|Function[]} [fn]
   *        Optionally add a hook (or hooks) to the lifecycle that your are getting.
   *
   * @return {Array}
   *         an array of hooks, or an empty array if there are none.
   */
  videojs$1.hooks = function (type, fn) {
    videojs$1.hooks_[type] = videojs$1.hooks_[type] || [];
    if (fn) {
      videojs$1.hooks_[type] = videojs$1.hooks_[type].concat(fn);
    }
    return videojs$1.hooks_[type];
  };

  /**
   * Add a function hook to a specific videojs lifecycle.
   *
   * @param {string} type
   *        the lifecycle to hook the function to.
   *
   * @param {Function|Function[]}
   *        The function or array of functions to attach.
   */
  videojs$1.hook = function (type, fn) {
    videojs$1.hooks(type, fn);
  };

  /**
   * Add a function hook that will only run once to a specific videojs lifecycle.
   *
   * @param {string} type
   *        the lifecycle to hook the function to.
   *
   * @param {Function|Function[]}
   *        The function or array of functions to attach.
   */
  videojs$1.hookOnce = function (type, fn) {
    videojs$1.hooks(type, [].concat(fn).map(function (original) {
      var wrapper = function wrapper() {
        videojs$1.removeHook(type, wrapper);
        return original.apply(undefined, arguments);
      };

      return wrapper;
    }));
  };

  /**
   * Remove a hook from a specific videojs lifecycle.
   *
   * @param {string} type
   *        the lifecycle that the function hooked to
   *
   * @param {Function} fn
   *        The hooked function to remove
   *
   * @return {boolean}
   *         The function that was removed or undef
   */
  videojs$1.removeHook = function (type, fn) {
    var index = videojs$1.hooks(type).indexOf(fn);

    if (index <= -1) {
      return false;
    }

    videojs$1.hooks_[type] = videojs$1.hooks_[type].slice();
    videojs$1.hooks_[type].splice(index, 1);

    return true;
  };

  // Add default styles
  if (window_1.VIDEOJS_NO_DYNAMIC_STYLE !== true && isReal()) {
    var style$1 = $('.vjs-styles-defaults');

    if (!style$1) {
      style$1 = createStyleElement('vjs-styles-defaults');
      var head = $('head');

      if (head) {
        head.insertBefore(style$1, head.firstChild);
      }
      setTextContent(style$1, '\n      .video-js {\n        width: 300px;\n        height: 150px;\n      }\n\n      .vjs-fluid {\n        padding-top: 56.25%\n      }\n    ');
    }
  }

  // Run Auto-load players
  // You have to wait at least once in case this script is loaded after your
  // video in the DOM (weird behavior only with minified version)
  autoSetupTimeout(1, videojs$1);

  /**
   * Current software version. Follows semver.
   *
   * @type {string}
   */
  videojs$1.VERSION = version;

  /**
   * The global options object. These are the settings that take effect
   * if no overrides are specified when the player is created.
   *
   * @type {Object}
   */
  videojs$1.options = Player.prototype.options_;

  /**
   * Get an object with the currently created players, keyed by player ID
   *
   * @return {Object}
   *         The created players
   */
  videojs$1.getPlayers = function () {
    return Player.players;
  };

  /**
   * Get a single player based on an ID or DOM element.
   *
   * This is useful if you want to check if an element or ID has an associated
   * Video.js player, but not create one if it doesn't.
   *
   * @param   {string|Element} id
   *          An HTML element - `<video>`, `<audio>`, or `<video-js>` -
   *          or a string matching the `id` of such an element.
   *
   * @returns {Player|undefined}
   *          A player instance or `undefined` if there is no player instance
   *          matching the argument.
   */
  videojs$1.getPlayer = function (id) {
    var players = Player.players;
    var tag = void 0;

    if (typeof id === 'string') {
      var nId = normalizeId(id);
      var player = players[nId];

      if (player) {
        return player;
      }

      tag = $('#' + nId);
    } else {
      tag = id;
    }

    if (isEl(tag)) {
      var _tag = tag,
        _player = _tag.player,
        playerId = _tag.playerId;

      // Element may have a `player` property referring to an already created
      // player instance. If so, return that.

      if (_player || players[playerId]) {
        return _player || players[playerId];
      }
    }
  };

  /**
   * Returns an array of all current players.
   *
   * @return {Array}
   *         An array of all players. The array will be in the order that
   *         `Object.keys` provides, which could potentially vary between
   *         JavaScript engines.
   *
   */
  videojs$1.getAllPlayers = function () {
    return (

      // Disposed players leave a key with a `null` value, so we need to make sure
      // we filter those out.
      Object.keys(Player.players).map(function (k) {
        return Player.players[k];
      }).filter(Boolean)
    );
  };

  /**
   * Expose players object.
   *
   * @memberOf videojs
   * @property {Object} players
   */
  videojs$1.players = Player.players;

  /**
   * Get a component class object by name
   *
   * @borrows Component.getComponent as videojs.getComponent
   */
  videojs$1.getComponent = Component.getComponent;

  /**
   * Register a component so it can referred to by name. Used when adding to other
   * components, either through addChild `component.addChild('myComponent')` or through
   * default children options  `{ children: ['myComponent'] }`.
   *
   * > NOTE: You could also just initialize the component before adding.
   * `component.addChild(new MyComponent());`
   *
   * @param {string} name
   *        The class name of the component
   *
   * @param {Component} comp
   *        The component class
   *
   * @return {Component}
   *         The newly registered component
   */
  videojs$1.registerComponent = function (name$$1, comp) {
    if (Tech.isTech(comp)) {
      log$1.warn('The ' + name$$1 + ' tech was registered as a component. It should instead be registered using videojs.registerTech(name, tech)');
    }

    Component.registerComponent.call(Component, name$$1, comp);
  };

  /**
   * Get a Tech class object by name
   *
   * @borrows Tech.getTech as videojs.getTech
   */
  videojs$1.getTech = Tech.getTech;

  /**
   * Register a Tech so it can referred to by name.
   * This is used in the tech order for the player.
   *
   * @borrows Tech.registerTech as videojs.registerTech
   */
  videojs$1.registerTech = Tech.registerTech;

  /**
   * Register a middleware to a source type.
   *
   * @param {String} type A string representing a MIME type.
   * @param {function(player):object} middleware A middleware factory that takes a player.
   */
  videojs$1.use = use;

  /**
   * An object that can be returned by a middleware to signify
   * that the middleware is being terminated.
   *
   * @type {object}
   * @memberOf {videojs}
   * @property {object} middleware.TERMINATOR
   */
  Object.defineProperty(videojs$1, 'middleware', {
    value: {},
    writeable: false,
    enumerable: true
  });

  Object.defineProperty(videojs$1.middleware, 'TERMINATOR', {
    value: TERMINATOR,
    writeable: false,
    enumerable: true
  });

  /**
   * A suite of browser and device tests from {@link browser}.
   *
   * @type {Object}
   * @private
   */
  videojs$1.browser = browser;

  /**
   * Whether or not the browser supports touch events. Included for backward
   * compatibility with 4.x, but deprecated. Use `videojs.browser.TOUCH_ENABLED`
   * instead going forward.
   *
   * @deprecated since version 5.0
   * @type {boolean}
   */
  videojs$1.TOUCH_ENABLED = TOUCH_ENABLED;

  /**
   * Subclass an existing class
   * Mimics ES6 subclassing with the `extend` keyword
   *
   * @borrows extend:extendFn as videojs.extend
   */
  videojs$1.extend = extendFn;

  /**
   * Merge two options objects recursively
   * Performs a deep merge like lodash.merge but **only merges plain objects**
   * (not arrays, elements, anything else)
   * Other values will be copied directly from the second object.
   *
   * @borrows merge-options:mergeOptions as videojs.mergeOptions
   */
  videojs$1.mergeOptions = mergeOptions;

  /**
   * Change the context (this) of a function
   *
   * > NOTE: as of v5.0 we require an ES5 shim, so you should use the native
   * `function() {}.bind(newContext);` instead of this.
   *
   * @borrows fn:bind as videojs.bind
   */
  videojs$1.bind = bind;

  /**
   * Register a Video.js plugin.
   *
   * @borrows plugin:registerPlugin as videojs.registerPlugin
   * @method registerPlugin
   *
   * @param  {string} name
   *         The name of the plugin to be registered. Must be a string and
   *         must not match an existing plugin or a method on the `Player`
   *         prototype.
   *
   * @param  {Function} plugin
   *         A sub-class of `Plugin` or a function for basic plugins.
   *
   * @return {Function}
   *         For advanced plugins, a factory function for that plugin. For
   *         basic plugins, a wrapper function that initializes the plugin.
   */
  videojs$1.registerPlugin = Plugin.registerPlugin;

  /**
   * Deprecated method to register a plugin with Video.js
   *
   * @deprecated
   *        videojs.plugin() is deprecated; use videojs.registerPlugin() instead
   *
   * @param {string} name
   *        The plugin name
   *
   * @param {Plugin|Function} plugin
   *         The plugin sub-class or function
   */
  videojs$1.plugin = function (name$$1, plugin) {
    log$1.warn('videojs.plugin() is deprecated; use videojs.registerPlugin() instead');
    return Plugin.registerPlugin(name$$1, plugin);
  };

  /**
   * Gets an object containing multiple Video.js plugins.
   *
   * @param  {Array} [names]
   *         If provided, should be an array of plugin names. Defaults to _all_
   *         plugin names.
   *
   * @return {Object|undefined}
   *         An object containing plugin(s) associated with their name(s) or
   *         `undefined` if no matching plugins exist).
   */
  videojs$1.getPlugins = Plugin.getPlugins;

  /**
   * Gets a plugin by name if it exists.
   *
   * @param  {string} name
   *         The name of a plugin.
   *
   * @return {Function|undefined}
   *         The plugin (or `undefined`).
   */
  videojs$1.getPlugin = Plugin.getPlugin;

  /**
   * Gets a plugin's version, if available
   *
   * @param  {string} name
   *         The name of a plugin.
   *
   * @return {string}
   *         The plugin's version or an empty string.
   */
  videojs$1.getPluginVersion = Plugin.getPluginVersion;

  /**
   * Adding languages so that they're available to all players.
   * Example: `videojs.addLanguage('es', { 'Hello': 'Hola' });`
   *
   * @param {string} code
   *        The language code or dictionary property
   *
   * @param {Object} data
   *        The data values to be translated
   *
   * @return {Object}
   *         The resulting language dictionary object
   */
  videojs$1.addLanguage = function (code, data) {
    var _mergeOptions;

    code = ('' + code).toLowerCase();

    videojs$1.options.languages = mergeOptions(videojs$1.options.languages, (_mergeOptions = {}, _mergeOptions[code] = data, _mergeOptions));

    return videojs$1.options.languages[code];
  };

  /**
   * Log messages
   *
   * @borrows log:log as videojs.log
   */
  videojs$1.log = log$1;

  /**
   * Creates an emulated TimeRange object.
   *
   * @borrows time-ranges:createTimeRanges as videojs.createTimeRange
   */
  /**
   * @borrows time-ranges:createTimeRanges as videojs.createTimeRanges
   */
  videojs$1.createTimeRange = videojs$1.createTimeRanges = createTimeRanges;

  /**
   * Format seconds as a time string, H:MM:SS or M:SS
   * Supplying a guide (in seconds) will force a number of leading zeros
   * to cover the length of the guide
   *
   * @borrows format-time:formatTime as videojs.formatTime
   */
  videojs$1.formatTime = formatTime;

  /**
   * Replaces format-time with a custom implementation, to be used in place of the default.
   *
   * @borrows format-time:setFormatTime as videojs.setFormatTime
   *
   * @method setFormatTime
   *
   * @param {Function} customFn
   *        A custom format-time function which will be called with the current time and guide (in seconds) as arguments.
   *        Passed fn should return a string.
   */
  videojs$1.setFormatTime = setFormatTime;

  /**
   * Resets format-time to the default implementation.
   *
   * @borrows format-time:resetFormatTime as videojs.resetFormatTime
   *
   * @method resetFormatTime
   */
  videojs$1.resetFormatTime = resetFormatTime;

  /**
   * Resolve and parse the elements of a URL
   *
   * @borrows url:parseUrl as videojs.parseUrl
   *
   */
  videojs$1.parseUrl = parseUrl;

  /**
   * Returns whether the url passed is a cross domain request or not.
   *
   * @borrows url:isCrossOrigin as videojs.isCrossOrigin
   */
  videojs$1.isCrossOrigin = isCrossOrigin;

  /**
   * Event target class.
   *
   * @borrows EventTarget as videojs.EventTarget
   */
  videojs$1.EventTarget = EventTarget;

  /**
   * Add an event listener to element
   * It stores the handler function in a separate cache object
   * and adds a generic handler to the element's event,
   * along with a unique id (guid) to the element.
   *
   * @borrows events:on as videojs.on
   */
  videojs$1.on = on;

  /**
   * Trigger a listener only once for an event
   *
   * @borrows events:one as videojs.one
   */
  videojs$1.one = one;

  /**
   * Removes event listeners from an element
   *
   * @borrows events:off as videojs.off
   */
  videojs$1.off = off;

  /**
   * Trigger an event for an element
   *
   * @borrows events:trigger as videojs.trigger
   */
  videojs$1.trigger = trigger;

  /**
   * A cross-browser XMLHttpRequest wrapper. Here's a simple example:
   *
   * @param {Object} options
   *        settings for the request.
   *
   * @return {XMLHttpRequest|XDomainRequest}
   *         The request object.
   *
   * @see https://github.com/Raynos/xhr
   */
  videojs$1.xhr = xhr;

  /**
   * TextTrack class
   *
   * @borrows TextTrack as videojs.TextTrack
   */
  videojs$1.TextTrack = TextTrack;

  /**
   * export the AudioTrack class so that source handlers can create
   * AudioTracks and then add them to the players AudioTrackList
   *
   * @borrows AudioTrack as videojs.AudioTrack
   */
  videojs$1.AudioTrack = AudioTrack;

  /**
   * export the VideoTrack class so that source handlers can create
   * VideoTracks and then add them to the players VideoTrackList
   *
   * @borrows VideoTrack as videojs.VideoTrack
   */
  videojs$1.VideoTrack = VideoTrack;

  /**
   * Determines, via duck typing, whether or not a value is a DOM element.
   *
   * @borrows dom:isEl as videojs.isEl
   * @deprecated Use videojs.dom.isEl() instead
   */

  /**
   * Determines, via duck typing, whether or not a value is a text node.
   *
   * @borrows dom:isTextNode as videojs.isTextNode
   * @deprecated Use videojs.dom.isTextNode() instead
   */

  /**
   * Creates an element and applies properties.
   *
   * @borrows dom:createEl as videojs.createEl
   * @deprecated Use videojs.dom.createEl() instead
   */

  /**
   * Check if an element has a CSS class
   *
   * @borrows dom:hasElClass as videojs.hasClass
   * @deprecated Use videojs.dom.hasClass() instead
   */

  /**
   * Add a CSS class name to an element
   *
   * @borrows dom:addElClass as videojs.addClass
   * @deprecated Use videojs.dom.addClass() instead
   */

  /**
   * Remove a CSS class name from an element
   *
   * @borrows dom:removeElClass as videojs.removeClass
   * @deprecated Use videojs.dom.removeClass() instead
   */

  /**
   * Adds or removes a CSS class name on an element depending on an optional
   * condition or the presence/absence of the class name.
   *
   * @borrows dom:toggleElClass as videojs.toggleClass
   * @deprecated Use videojs.dom.toggleClass() instead
   */

  /**
   * Apply attributes to an HTML element.
   *
   * @borrows dom:setElAttributes as videojs.setAttribute
   * @deprecated Use videojs.dom.setAttributes() instead
   */

  /**
   * Get an element's attribute values, as defined on the HTML tag
   * Attributes are not the same as properties. They're defined on the tag
   * or with setAttribute (which shouldn't be used with HTML)
   * This will return true or false for boolean attributes.
   *
   * @borrows dom:getElAttributes as videojs.getAttributes
   * @deprecated Use videojs.dom.getAttributes() instead
   */

  /**
   * Empties the contents of an element.
   *
   * @borrows dom:emptyEl as videojs.emptyEl
   * @deprecated Use videojs.dom.emptyEl() instead
   */

  /**
   * Normalizes and appends content to an element.
   *
   * The content for an element can be passed in multiple types and
   * combinations, whose behavior is as follows:
   *
   * - String
   *   Normalized into a text node.
   *
   * - Element, TextNode
   *   Passed through.
   *
   * - Array
   *   A one-dimensional array of strings, elements, nodes, or functions (which
   *   return single strings, elements, or nodes).
   *
   * - Function
   *   If the sole argument, is expected to produce a string, element,
   *   node, or array.
   *
   * @borrows dom:appendContents as videojs.appendContet
   * @deprecated Use videojs.dom.appendContent() instead
   */

  /**
   * Normalizes and inserts content into an element; this is identical to
   * `appendContent()`, except it empties the element first.
   *
   * The content for an element can be passed in multiple types and
   * combinations, whose behavior is as follows:
   *
   * - String
   *   Normalized into a text node.
   *
   * - Element, TextNode
   *   Passed through.
   *
   * - Array
   *   A one-dimensional array of strings, elements, nodes, or functions (which
   *   return single strings, elements, or nodes).
   *
   * - Function
   *   If the sole argument, is expected to produce a string, element,
   *   node, or array.
   *
   * @borrows dom:insertContent as videojs.insertContent
   * @deprecated Use videojs.dom.insertContent() instead
   */
  ['isEl', 'isTextNode', 'createEl', 'hasClass', 'addClass', 'removeClass', 'toggleClass', 'setAttributes', 'getAttributes', 'emptyEl', 'appendContent', 'insertContent'].forEach(function (k) {
    videojs$1[k] = function () {
      log$1.warn('videojs.' + k + '() is deprecated; use videojs.dom.' + k + '() instead');
      return Dom[k].apply(null, arguments);
    };
  });

  /**
   * A safe getComputedStyle.
   *
   * This is because in Firefox, if the player is loaded in an iframe with `display:none`,
   * then `getComputedStyle` returns `null`, so, we do a null-check to make sure
   * that the player doesn't break in these cases.
   * See https://bugzilla.mozilla.org/show_bug.cgi?id=548397 for more details.
   *
   * @borrows computed-style:computedStyle as videojs.computedStyle
   */
  videojs$1.computedStyle = computedStyle;

  /**
   * Export the Dom utilities for use in external plugins
   * and Tech's
   */
  videojs$1.dom = Dom;

  /**
   * Export the Url utilities for use in external plugins
   * and Tech's
   */
  videojs$1.url = Url;

  var urlToolkit = createCommonjsModule(function (module, exports) {
    // see https://tools.ietf.org/html/rfc1808

    /* jshint ignore:start */
    (function (root) {
      /* jshint ignore:end */

      var URL_REGEX = /^((?:[a-zA-Z0-9+\-.]+:)?)(\/\/[^\/\;?#]*)?(.*?)??(;.*?)?(\?.*?)?(#.*?)?$/;
      var FIRST_SEGMENT_REGEX = /^([^\/;?#]*)(.*)$/;
      var SLASH_DOT_REGEX = /(?:\/|^)\.(?=\/)/g;
      var SLASH_DOT_DOT_REGEX = /(?:\/|^)\.\.\/(?!\.\.\/).*?(?=\/)/g;

      var URLToolkit = { // jshint ignore:line
        // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //
        // E.g
        // With opts.alwaysNormalize = false (default, spec compliant)
        // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g
        // With opts.alwaysNormalize = true (not spec compliant)
        // http://a.com/b/cd + /e/f/../g => http://a.com/e/g
        buildAbsoluteURL: function buildAbsoluteURL(baseURL, relativeURL, opts) {
          opts = opts || {};
          // remove any remaining space and CRLF
          baseURL = baseURL.trim();
          relativeURL = relativeURL.trim();
          if (!relativeURL) {
            // 2a) If the embedded URL is entirely empty, it inherits the
            // entire base URL (i.e., is set equal to the base URL)
            // and we are done.
            if (!opts.alwaysNormalize) {
              return baseURL;
            }
            var basePartsForNormalise = URLToolkit.parseURL(baseURL);
            if (!basePartsForNormalise) {
              throw new Error('Error trying to parse base URL.');
            }
            basePartsForNormalise.path = URLToolkit.normalizePath(basePartsForNormalise.path);
            return URLToolkit.buildURLFromParts(basePartsForNormalise);
          }
          var relativeParts = URLToolkit.parseURL(relativeURL);
          if (!relativeParts) {
            throw new Error('Error trying to parse relative URL.');
          }
          if (relativeParts.scheme) {
            // 2b) If the embedded URL starts with a scheme name, it is
            // interpreted as an absolute URL and we are done.
            if (!opts.alwaysNormalize) {
              return relativeURL;
            }
            relativeParts.path = URLToolkit.normalizePath(relativeParts.path);
            return URLToolkit.buildURLFromParts(relativeParts);
          }
          var baseParts = URLToolkit.parseURL(baseURL);
          if (!baseParts) {
            throw new Error('Error trying to parse base URL.');
          }
          if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {
            // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc
            // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'
            var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);
            baseParts.netLoc = pathParts[1];
            baseParts.path = pathParts[2];
          }
          if (baseParts.netLoc && !baseParts.path) {
            baseParts.path = '/';
          }
          var builtParts = {
            // 2c) Otherwise, the embedded URL inherits the scheme of
            // the base URL.
            scheme: baseParts.scheme,
            netLoc: relativeParts.netLoc,
            path: null,
            params: relativeParts.params,
            query: relativeParts.query,
            fragment: relativeParts.fragment
          };
          if (!relativeParts.netLoc) {
            // 3) If the embedded URL's <net_loc> is non-empty, we skip to
            // Step 7.  Otherwise, the embedded URL inherits the <net_loc>
            // (if any) of the base URL.
            builtParts.netLoc = baseParts.netLoc;
            // 4) If the embedded URL path is preceded by a slash "/", the
            // path is not relative and we skip to Step 7.
            if (relativeParts.path[0] !== '/') {
              if (!relativeParts.path) {
                // 5) If the embedded URL path is empty (and not preceded by a
                // slash), then the embedded URL inherits the base URL path
                builtParts.path = baseParts.path;
                // 5a) if the embedded URL's <params> is non-empty, we skip to
                // step 7; otherwise, it inherits the <params> of the base
                // URL (if any) and
                if (!relativeParts.params) {
                  builtParts.params = baseParts.params;
                  // 5b) if the embedded URL's <query> is non-empty, we skip to
                  // step 7; otherwise, it inherits the <query> of the base
                  // URL (if any) and we skip to step 7.
                  if (!relativeParts.query) {
                    builtParts.query = baseParts.query;
                  }
                }
              } else {
                // 6) The last segment of the base URL's path (anything
                // following the rightmost slash "/", or the entire path if no
                // slash is present) is removed and the embedded URL's path is
                // appended in its place.
                var baseURLPath = baseParts.path;
                var newPath = baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) + relativeParts.path;
                builtParts.path = URLToolkit.normalizePath(newPath);
              }
            }
          }
          if (builtParts.path === null) {
            builtParts.path = opts.alwaysNormalize ? URLToolkit.normalizePath(relativeParts.path) : relativeParts.path;
          }
          return URLToolkit.buildURLFromParts(builtParts);
        },
        parseURL: function parseURL(url) {
          var parts = URL_REGEX.exec(url);
          if (!parts) {
            return null;
          }
          return {
            scheme: parts[1] || '',
            netLoc: parts[2] || '',
            path: parts[3] || '',
            params: parts[4] || '',
            query: parts[5] || '',
            fragment: parts[6] || ''
          };
        },
        normalizePath: function normalizePath(path) {
          // The following operations are
          // then applied, in order, to the new path:
          // 6a) All occurrences of "./", where "." is a complete path
          // segment, are removed.
          // 6b) If the path ends with "." as a complete path segment,
          // that "." is removed.
          path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, '');
          // 6c) All occurrences of "<segment>/../", where <segment> is a
          // complete path segment not equal to "..", are removed.
          // Removal of these path segments is performed iteratively,
          // removing the leftmost matching pattern on each iteration,
          // until no matching pattern remains.
          // 6d) If the path ends with "<segment>/..", where <segment> is a
          // complete path segment not equal to "..", that
          // "<segment>/.." is removed.
          while (path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length) {
          } // jshint ignore:line
          return path.split('').reverse().join('');
        },
        buildURLFromParts: function buildURLFromParts(parts) {
          return parts.scheme + parts.netLoc + parts.path + parts.params + parts.query + parts.fragment;
        }
      };

      /* jshint ignore:start */
      module.exports = URLToolkit;
    })(commonjsGlobal);
    /* jshint ignore:end */
  });

  var classCallCheck$1 = function classCallCheck$$1(instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  };

  var _extends$1 = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  var inherits$1 = function inherits$$1(subClass, superClass) {
    if (typeof superClass !== "function" && superClass !== null) {
      throw new TypeError("Super expression must either be null or a function, not " + (typeof superClass === "undefined" ? "undefined" : _typeof(superClass)));
    }

    subClass.prototype = Object.create(superClass && superClass.prototype, {
      constructor: {
        value: subClass,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
    if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
  };

  var possibleConstructorReturn$1 = function possibleConstructorReturn$$1(self, call) {
    if (!self) {
      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
    }

    return call && ((typeof call === "undefined" ? "undefined" : _typeof(call)) === "object" || typeof call === "function") ? call : self;
  };

  /**
   * @file stream.js
   */
  /**
   * A lightweight readable stream implemention that handles event dispatching.
   *
   * @class Stream
   */
  var Stream = function () {
    function Stream() {
      classCallCheck$1(this, Stream);

      this.listeners = {};
    }

    /**
     * Add a listener for a specified event type.
     *
     * @param {String} type the event name
     * @param {Function} listener the callback to be invoked when an event of
     * the specified type occurs
     */

    Stream.prototype.on = function on(type, listener) {
      if (!this.listeners[type]) {
        this.listeners[type] = [];
      }
      this.listeners[type].push(listener);
    };

    /**
     * Remove a listener for a specified event type.
     *
     * @param {String} type the event name
     * @param {Function} listener  a function previously registered for this
     * type of event through `on`
     * @return {Boolean} if we could turn it off or not
     */

    Stream.prototype.off = function off(type, listener) {
      if (!this.listeners[type]) {
        return false;
      }

      var index = this.listeners[type].indexOf(listener);

      this.listeners[type].splice(index, 1);
      return index > -1;
    };

    /**
     * Trigger an event of the specified type on this stream. Any additional
     * arguments to this function are passed as parameters to event listeners.
     *
     * @param {String} type the event name
     */

    Stream.prototype.trigger = function trigger(type) {
      var callbacks = this.listeners[type];
      var i = void 0;
      var length = void 0;
      var args = void 0;

      if (!callbacks) {
        return;
      }
      // Slicing the arguments on every invocation of this method
      // can add a significant amount of overhead. Avoid the
      // intermediate object creation for the common case of a
      // single callback argument
      if (arguments.length === 2) {
        length = callbacks.length;
        for (i = 0; i < length; ++i) {
          callbacks[i].call(this, arguments[1]);
        }
      } else {
        args = Array.prototype.slice.call(arguments, 1);
        length = callbacks.length;
        for (i = 0; i < length; ++i) {
          callbacks[i].apply(this, args);
        }
      }
    };

    /**
     * Destroys the stream and cleans up.
     */

    Stream.prototype.dispose = function dispose() {
      this.listeners = {};
    };
    /**
     * Forwards all `data` events on this stream to the destination stream. The
     * destination stream should provide a method `push` to receive the data
     * events as they arrive.
     *
     * @param {Stream} destination the stream that will receive all `data` events
     * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options
     */

    Stream.prototype.pipe = function pipe(destination) {
      this.on('data', function (data) {
        destination.push(data);
      });
    };

    return Stream;
  }();

  /**
   * @file m3u8/line-stream.js
   */
  /**
   * A stream that buffers string input and generates a `data` event for each
   * line.
   *
   * @class LineStream
   * @extends Stream
   */

  var LineStream = function (_Stream) {
    inherits$1(LineStream, _Stream);

    function LineStream() {
      classCallCheck$1(this, LineStream);

      var _this = possibleConstructorReturn$1(this, _Stream.call(this));

      _this.buffer = '';
      return _this;
    }

    /**
     * Add new data to be parsed.
     *
     * @param {String} data the text to process
     */

    LineStream.prototype.push = function push(data) {
      var nextNewline = void 0;

      this.buffer += data;
      nextNewline = this.buffer.indexOf('\n');

      for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\n')) {
        this.trigger('data', this.buffer.substring(0, nextNewline));
        this.buffer = this.buffer.substring(nextNewline + 1);
      }
    };

    return LineStream;
  }(Stream);

  /**
   * @file m3u8/parse-stream.js
   */
  /**
   * "forgiving" attribute list psuedo-grammar:
   * attributes -> keyvalue (',' keyvalue)*
   * keyvalue   -> key '=' value
   * key        -> [^=]*
   * value      -> '"' [^"]* '"' | [^,]*
   */
  var attributeSeparator = function attributeSeparator() {
    var key = '[^=]*';
    var value = '"[^"]*"|[^,]*';
    var keyvalue = '(?:' + key + ')=(?:' + value + ')';

    return new RegExp('(?:^|,)(' + keyvalue + ')');
  };

  /**
   * Parse attributes from a line given the seperator
   *
   * @param {String} attributes the attibute line to parse
   */
  var parseAttributes = function parseAttributes(attributes) {
    // split the string using attributes as the separator
    var attrs = attributes.split(attributeSeparator());
    var result = {};
    var i = attrs.length;
    var attr = void 0;

    while (i--) {
      // filter out unmatched portions of the string
      if (attrs[i] === '') {
        continue;
      }

      // split the key and value
      attr = /([^=]*)=(.*)/.exec(attrs[i]).slice(1);
      // trim whitespace and remove optional quotes around the value
      attr[0] = attr[0].replace(/^\s+|\s+$/g, '');
      attr[1] = attr[1].replace(/^\s+|\s+$/g, '');
      attr[1] = attr[1].replace(/^['"](.*)['"]$/g, '$1');
      result[attr[0]] = attr[1];
    }
    return result;
  };

  /**
   * A line-level M3U8 parser event stream. It expects to receive input one
   * line at a time and performs a context-free parse of its contents. A stream
   * interpretation of a manifest can be useful if the manifest is expected to
   * be too large to fit comfortably into memory or the entirety of the input
   * is not immediately available. Otherwise, it's probably much easier to work
   * with a regular `Parser` object.
   *
   * Produces `data` events with an object that captures the parser's
   * interpretation of the input. That object has a property `tag` that is one
   * of `uri`, `comment`, or `tag`. URIs only have a single additional
   * property, `line`, which captures the entirety of the input without
   * interpretation. Comments similarly have a single additional property
   * `text` which is the input without the leading `#`.
   *
   * Tags always have a property `tagType` which is the lower-cased version of
   * the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,
   * `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized
   * tags are given the tag type `unknown` and a single additional property
   * `data` with the remainder of the input.
   *
   * @class ParseStream
   * @extends Stream
   */

  var ParseStream = function (_Stream) {
    inherits$1(ParseStream, _Stream);

    function ParseStream() {
      classCallCheck$1(this, ParseStream);

      var _this = possibleConstructorReturn$1(this, _Stream.call(this));

      _this.customParsers = [];
      return _this;
    }

    /**
     * Parses an additional line of input.
     *
     * @param {String} line a single line of an M3U8 file to parse
     */

    ParseStream.prototype.push = function push(line) {
      var match = void 0;
      var event = void 0;

      // strip whitespace
      line = line.replace(/^[\u0000\s]+|[\u0000\s]+$/g, '');
      if (line.length === 0) {
        // ignore empty lines
        return;
      }

      // URIs
      if (line[0] !== '#') {
        this.trigger('data', {
          type: 'uri',
          uri: line
        });
        return;
      }

      for (var i = 0; i < this.customParsers.length; i++) {
        if (this.customParsers[i].call(this, line)) {
          return;
        }
      }

      // Comments
      if (line.indexOf('#EXT') !== 0) {
        this.trigger('data', {
          type: 'comment',
          text: line.slice(1)
        });
        return;
      }

      // strip off any carriage returns here so the regex matching
      // doesn't have to account for them.
      line = line.replace('\r', '');

      // Tags
      match = /^#EXTM3U/.exec(line);
      if (match) {
        this.trigger('data', {
          type: 'tag',
          tagType: 'm3u'
        });
        return;
      }
      match = /^#EXTINF:?([0-9\.]*)?,?(.*)?$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'inf'
        };
        if (match[1]) {
          event.duration = parseFloat(match[1]);
        }
        if (match[2]) {
          event.title = match[2];
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-TARGETDURATION:?([0-9.]*)?/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'targetduration'
        };
        if (match[1]) {
          event.duration = parseInt(match[1], 10);
        }
        this.trigger('data', event);
        return;
      }
      match = /^#ZEN-TOTAL-DURATION:?([0-9.]*)?/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'totalduration'
        };
        if (match[1]) {
          event.duration = parseInt(match[1], 10);
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-VERSION:?([0-9.]*)?/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'version'
        };
        if (match[1]) {
          event.version = parseInt(match[1], 10);
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-MEDIA-SEQUENCE:?(\-?[0-9.]*)?/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'media-sequence'
        };
        if (match[1]) {
          event.number = parseInt(match[1], 10);
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-DISCONTINUITY-SEQUENCE:?(\-?[0-9.]*)?/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'discontinuity-sequence'
        };
        if (match[1]) {
          event.number = parseInt(match[1], 10);
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-PLAYLIST-TYPE:?(.*)?$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'playlist-type'
        };
        if (match[1]) {
          event.playlistType = match[1];
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-BYTERANGE:?([0-9.]*)?@?([0-9.]*)?/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'byterange'
        };
        if (match[1]) {
          event.length = parseInt(match[1], 10);
        }
        if (match[2]) {
          event.offset = parseInt(match[2], 10);
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-ALLOW-CACHE:?(YES|NO)?/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'allow-cache'
        };
        if (match[1]) {
          event.allowed = !/NO/.test(match[1]);
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-MAP:?(.*)$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'map'
        };

        if (match[1]) {
          var attributes = parseAttributes(match[1]);

          if (attributes.URI) {
            event.uri = attributes.URI;
          }
          if (attributes.BYTERANGE) {
            var _attributes$BYTERANGE = attributes.BYTERANGE.split('@'),
              length = _attributes$BYTERANGE[0],
              offset = _attributes$BYTERANGE[1];

            event.byterange = {};
            if (length) {
              event.byterange.length = parseInt(length, 10);
            }
            if (offset) {
              event.byterange.offset = parseInt(offset, 10);
            }
          }
        }

        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-STREAM-INF:?(.*)$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'stream-inf'
        };
        if (match[1]) {
          event.attributes = parseAttributes(match[1]);

          if (event.attributes.RESOLUTION) {
            var split = event.attributes.RESOLUTION.split('x');
            var resolution = {};

            if (split[0]) {
              resolution.width = parseInt(split[0], 10);
            }
            if (split[1]) {
              resolution.height = parseInt(split[1], 10);
            }
            event.attributes.RESOLUTION = resolution;
          }
          if (event.attributes.BANDWIDTH) {
            event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);
          }
          if (event.attributes['PROGRAM-ID']) {
            event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);
          }
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-MEDIA:?(.*)$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'media'
        };
        if (match[1]) {
          event.attributes = parseAttributes(match[1]);
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-ENDLIST/.exec(line);
      if (match) {
        this.trigger('data', {
          type: 'tag',
          tagType: 'endlist'
        });
        return;
      }
      match = /^#EXT-X-DISCONTINUITY/.exec(line);
      if (match) {
        this.trigger('data', {
          type: 'tag',
          tagType: 'discontinuity'
        });
        return;
      }
      match = /^#EXT-X-PROGRAM-DATE-TIME:?(.*)$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'program-date-time'
        };
        if (match[1]) {
          event.dateTimeString = match[1];
          event.dateTimeObject = new Date(match[1]);
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-KEY:?(.*)$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'key'
        };
        if (match[1]) {
          event.attributes = parseAttributes(match[1]);
          // parse the IV string into a Uint32Array
          if (event.attributes.IV) {
            if (event.attributes.IV.substring(0, 2).toLowerCase() === '0x') {
              event.attributes.IV = event.attributes.IV.substring(2);
            }

            event.attributes.IV = event.attributes.IV.match(/.{8}/g);
            event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);
            event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);
            event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);
            event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);
            event.attributes.IV = new Uint32Array(event.attributes.IV);
          }
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-START:?(.*)$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'start'
        };
        if (match[1]) {
          event.attributes = parseAttributes(match[1]);

          event.attributes['TIME-OFFSET'] = parseFloat(event.attributes['TIME-OFFSET']);
          event.attributes.PRECISE = /YES/.test(event.attributes.PRECISE);
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-CUE-OUT-CONT:?(.*)?$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'cue-out-cont'
        };
        if (match[1]) {
          event.data = match[1];
        } else {
          event.data = '';
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-CUE-OUT:?(.*)?$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'cue-out'
        };
        if (match[1]) {
          event.data = match[1];
        } else {
          event.data = '';
        }
        this.trigger('data', event);
        return;
      }
      match = /^#EXT-X-CUE-IN:?(.*)?$/.exec(line);
      if (match) {
        event = {
          type: 'tag',
          tagType: 'cue-in'
        };
        if (match[1]) {
          event.data = match[1];
        } else {
          event.data = '';
        }
        this.trigger('data', event);
        return;
      }

      // unknown tag type
      this.trigger('data', {
        type: 'tag',
        data: line.slice(4)
      });
    };

    /**
     * Add a parser for custom headers
     *
     * @param {Object}   options              a map of options for the added parser
     * @param {RegExp}   options.expression   a regular expression to match the custom header
     * @param {string}   options.customType   the custom type to register to the output
     * @param {Function} [options.dataParser] function to parse the line into an object
     * @param {boolean}  [options.segment]    should tag data be attached to the segment object
     */

    ParseStream.prototype.addParser = function addParser(_ref) {
      var _this2 = this;

      var expression = _ref.expression,
        customType = _ref.customType,
        dataParser = _ref.dataParser,
        segment = _ref.segment;

      if (typeof dataParser !== 'function') {
        dataParser = function dataParser(line) {
          return line;
        };
      }
      this.customParsers.push(function (line) {
        var match = expression.exec(line);

        if (match) {
          _this2.trigger('data', {
            type: 'custom',
            data: dataParser(line),
            customType: customType,
            segment: segment
          });
          return true;
        }
      });
    };

    return ParseStream;
  }(Stream);

  /**
   * @file m3u8/parser.js
   */
  /**
   * A parser for M3U8 files. The current interpretation of the input is
   * exposed as a property `manifest` on parser objects. It's just two lines to
   * create and parse a manifest once you have the contents available as a string:
   *
   * ```js
   * var parser = new m3u8.Parser();
   * parser.push(xhr.responseText);
   * ```
   *
   * New input can later be applied to update the manifest object by calling
   * `push` again.
   *
   * The parser attempts to create a usable manifest object even if the
   * underlying input is somewhat nonsensical. It emits `info` and `warning`
   * events during the parse if it encounters input that seems invalid or
   * requires some property of the manifest object to be defaulted.
   *
   * @class Parser
   * @extends Stream
   */

  var Parser = function (_Stream) {
    inherits$1(Parser, _Stream);

    function Parser() {
      classCallCheck$1(this, Parser);

      var _this = possibleConstructorReturn$1(this, _Stream.call(this));

      _this.lineStream = new LineStream();
      _this.parseStream = new ParseStream();
      _this.lineStream.pipe(_this.parseStream);

      /* eslint-disable consistent-this */
      var self = _this;
      /* eslint-enable consistent-this */
      var uris = [];
      var currentUri = {};
      // if specified, the active EXT-X-MAP definition
      var currentMap = void 0;
      // if specified, the active decryption key
      var _key = void 0;
      var noop = function noop() {
      };
      var defaultMediaGroups = {
        'AUDIO': {},
        'VIDEO': {},
        'CLOSED-CAPTIONS': {},
        'SUBTITLES': {}
      };
      // group segments into numbered timelines delineated by discontinuities
      var currentTimeline = 0;

      // the manifest is empty until the parse stream begins delivering data
      _this.manifest = {
        allowCache: true,
        discontinuityStarts: [],
        segments: []
      };

      // update the manifest with the m3u8 entry from the parse stream
      _this.parseStream.on('data', function (entry) {
        var mediaGroup = void 0;
        var rendition = void 0;

        ({
          tag: function tag() {
            // switch based on the tag type
            (({
              'allow-cache': function allowCache() {
                this.manifest.allowCache = entry.allowed;
                if (!('allowed' in entry)) {
                  this.trigger('info', {
                    message: 'defaulting allowCache to YES'
                  });
                  this.manifest.allowCache = true;
                }
              },
              byterange: function byterange() {
                var byterange = {};

                if ('length' in entry) {
                  currentUri.byterange = byterange;
                  byterange.length = entry.length;

                  if (!('offset' in entry)) {
                    this.trigger('info', {
                      message: 'defaulting offset to zero'
                    });
                    entry.offset = 0;
                  }
                }
                if ('offset' in entry) {
                  currentUri.byterange = byterange;
                  byterange.offset = entry.offset;
                }
              },
              endlist: function endlist() {
                this.manifest.endList = true;
              },
              inf: function inf() {
                if (!('mediaSequence' in this.manifest)) {
                  this.manifest.mediaSequence = 0;
                  this.trigger('info', {
                    message: 'defaulting media sequence to zero'
                  });
                }
                if (!('discontinuitySequence' in this.manifest)) {
                  this.manifest.discontinuitySequence = 0;
                  this.trigger('info', {
                    message: 'defaulting discontinuity sequence to zero'
                  });
                }
                if (entry.duration > 0) {
                  currentUri.duration = entry.duration;
                }

                if (entry.duration === 0) {
                  currentUri.duration = 0.01;
                  this.trigger('info', {
                    message: 'updating zero segment duration to a small value'
                  });
                }

                this.manifest.segments = uris;
              },
              key: function key() {
                if (!entry.attributes) {
                  this.trigger('warn', {
                    message: 'ignoring key declaration without attribute list'
                  });
                  return;
                }
                // clear the active encryption key
                if (entry.attributes.METHOD === 'NONE') {
                  _key = null;
                  return;
                }
                if (!entry.attributes.URI) {
                  this.trigger('warn', {
                    message: 'ignoring key declaration without URI'
                  });
                  return;
                }
                if (!entry.attributes.METHOD) {
                  this.trigger('warn', {
                    message: 'defaulting key method to AES-128'
                  });
                }

                // setup an encryption key for upcoming segments
                _key = {
                  method: entry.attributes.METHOD || 'AES-128',
                  uri: entry.attributes.URI
                };

                if (typeof entry.attributes.IV !== 'undefined') {
                  _key.iv = entry.attributes.IV;
                }
              },
              'media-sequence': function mediaSequence() {
                if (!isFinite(entry.number)) {
                  this.trigger('warn', {
                    message: 'ignoring invalid media sequence: ' + entry.number
                  });
                  return;
                }
                this.manifest.mediaSequence = entry.number;
              },
              'discontinuity-sequence': function discontinuitySequence() {
                if (!isFinite(entry.number)) {
                  this.trigger('warn', {
                    message: 'ignoring invalid discontinuity sequence: ' + entry.number
                  });
                  return;
                }
                this.manifest.discontinuitySequence = entry.number;
                currentTimeline = entry.number;
              },
              'playlist-type': function playlistType() {
                if (!/VOD|EVENT/.test(entry.playlistType)) {
                  this.trigger('warn', {
                    message: 'ignoring unknown playlist type: ' + entry.playlist
                  });
                  return;
                }
                this.manifest.playlistType = entry.playlistType;
              },
              map: function map() {
                currentMap = {};
                if (entry.uri) {
                  currentMap.uri = entry.uri;
                }
                if (entry.byterange) {
                  currentMap.byterange = entry.byterange;
                }
              },
              'stream-inf': function streamInf() {
                this.manifest.playlists = uris;
                this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;

                if (!entry.attributes) {
                  this.trigger('warn', {
                    message: 'ignoring empty stream-inf attributes'
                  });
                  return;
                }

                if (!currentUri.attributes) {
                  currentUri.attributes = {};
                }
                _extends$1(currentUri.attributes, entry.attributes);
              },
              media: function media() {
                this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;

                if (!(entry.attributes && entry.attributes.TYPE && entry.attributes['GROUP-ID'] && entry.attributes.NAME)) {
                  this.trigger('warn', {
                    message: 'ignoring incomplete or missing media group'
                  });
                  return;
                }

                // find the media group, creating defaults as necessary
                var mediaGroupType = this.manifest.mediaGroups[entry.attributes.TYPE];

                mediaGroupType[entry.attributes['GROUP-ID']] = mediaGroupType[entry.attributes['GROUP-ID']] || {};
                mediaGroup = mediaGroupType[entry.attributes['GROUP-ID']];

                // collect the rendition metadata
                rendition = {
                  'default': /yes/i.test(entry.attributes.DEFAULT)
                };
                if (rendition['default']) {
                  rendition.autoselect = true;
                } else {
                  rendition.autoselect = /yes/i.test(entry.attributes.AUTOSELECT);
                }
                if (entry.attributes.LANGUAGE) {
                  rendition.language = entry.attributes.LANGUAGE;
                }
                if (entry.attributes.URI) {
                  rendition.uri = entry.attributes.URI;
                }
                if (entry.attributes['INSTREAM-ID']) {
                  rendition.instreamId = entry.attributes['INSTREAM-ID'];
                }
                if (entry.attributes.CHARACTERISTICS) {
                  rendition.characteristics = entry.attributes.CHARACTERISTICS;
                }
                if (entry.attributes.FORCED) {
                  rendition.forced = /yes/i.test(entry.attributes.FORCED);
                }

                // insert the new rendition
                mediaGroup[entry.attributes.NAME] = rendition;
              },
              discontinuity: function discontinuity() {
                currentTimeline += 1;
                currentUri.discontinuity = true;
                this.manifest.discontinuityStarts.push(uris.length);
              },
              'program-date-time': function programDateTime() {
                if (typeof this.manifest.dateTimeString === 'undefined') {
                  // PROGRAM-DATE-TIME is a media-segment tag, but for backwards
                  // compatibility, we add the first occurence of the PROGRAM-DATE-TIME tag
                  // to the manifest object
                  // TODO: Consider removing this in future major version
                  this.manifest.dateTimeString = entry.dateTimeString;
                  this.manifest.dateTimeObject = entry.dateTimeObject;
                }

                currentUri.dateTimeString = entry.dateTimeString;
                currentUri.dateTimeObject = entry.dateTimeObject;
              },
              targetduration: function targetduration() {
                if (!isFinite(entry.duration) || entry.duration < 0) {
                  this.trigger('warn', {
                    message: 'ignoring invalid target duration: ' + entry.duration
                  });
                  return;
                }
                this.manifest.targetDuration = entry.duration;
              },
              totalduration: function totalduration() {
                if (!isFinite(entry.duration) || entry.duration < 0) {
                  this.trigger('warn', {
                    message: 'ignoring invalid total duration: ' + entry.duration
                  });
                  return;
                }
                this.manifest.totalDuration = entry.duration;
              },
              start: function start() {
                if (!entry.attributes || isNaN(entry.attributes['TIME-OFFSET'])) {
                  this.trigger('warn', {
                    message: 'ignoring start declaration without appropriate attribute list'
                  });
                  return;
                }
                this.manifest.start = {
                  timeOffset: entry.attributes['TIME-OFFSET'],
                  precise: entry.attributes.PRECISE
                };
              },
              'cue-out': function cueOut() {
                currentUri.cueOut = entry.data;
              },
              'cue-out-cont': function cueOutCont() {
                currentUri.cueOutCont = entry.data;
              },
              'cue-in': function cueIn() {
                currentUri.cueIn = entry.data;
              }
            })[entry.tagType] || noop).call(self);
          },
          uri: function uri() {
            currentUri.uri = entry.uri;
            uris.push(currentUri);

            // if no explicit duration was declared, use the target duration
            if (this.manifest.targetDuration && !('duration' in currentUri)) {
              this.trigger('warn', {
                message: 'defaulting segment duration to the target duration'
              });
              currentUri.duration = this.manifest.targetDuration;
            }
            // annotate with encryption information, if necessary
            if (_key) {
              currentUri.key = _key;
            }
            currentUri.timeline = currentTimeline;
            // annotate with initialization segment information, if necessary
            if (currentMap) {
              currentUri.map = currentMap;
            }

            // prepare for the next URI
            currentUri = {};
          },
          comment: function comment() {
            // comments are not important for playback
          },
          custom: function custom() {
            // if this is segment-level data attach the output to the segment
            if (entry.segment) {
              currentUri.custom = currentUri.custom || {};
              currentUri.custom[entry.customType] = entry.data;
              // if this is manifest-level data attach to the top level manifest object
            } else {
              this.manifest.custom = this.manifest.custom || {};
              this.manifest.custom[entry.customType] = entry.data;
            }
          }
        })[entry.type].call(self);
      });
      return _this;
    }

    /**
     * Parse the input string and update the manifest object.
     *
     * @param {String} chunk a potentially incomplete portion of the manifest
     */

    Parser.prototype.push = function push(chunk) {
      this.lineStream.push(chunk);
    };

    /**
     * Flush any remaining input. This can be handy if the last line of an M3U8
     * manifest did not contain a trailing newline but the file has been
     * completely received.
     */

    Parser.prototype.end = function end() {
      // flush any buffered input
      this.lineStream.push('\n');
    };
    /**
     * Add an additional parser for non-standard tags
     *
     * @param {Object}   options              a map of options for the added parser
     * @param {RegExp}   options.expression   a regular expression to match the custom header
     * @param {string}   options.type         the type to register to the output
     * @param {Function} [options.dataParser] function to parse the line into an object
     * @param {boolean}  [options.segment]    should tag data be attached to the segment object
     */

    Parser.prototype.addParser = function addParser(options) {
      this.parseStream.addParser(options);
    };

    return Parser;
  }(Stream);

  /**
   * mpd-parser
   * @version 0.6.0
   * @copyright 2018 Brightcove, Inc
   * @license Apache-2.0
   */

  var formatAudioPlaylist = function formatAudioPlaylist(_ref) {
    var _attributes;

    var attributes = _ref.attributes,
      segments = _ref.segments;

    var playlist = {
      attributes: (_attributes = {
        NAME: attributes.id,
        BANDWIDTH: attributes.bandwidth,
        CODECS: attributes.codecs
      }, _attributes['PROGRAM-ID'] = 1, _attributes),
      uri: '',
      endList: (attributes.type || 'static') === 'static',
      timeline: attributes.periodIndex,
      resolvedUri: '',
      targetDuration: attributes.duration,
      segments: segments,
      mediaSequence: segments.length ? segments[0].number : 1
    };

    if (attributes.contentProtection) {
      playlist.contentProtection = attributes.contentProtection;
    }

    return playlist;
  };

  var formatVttPlaylist = function formatVttPlaylist(_ref2) {
    var _attributes2;

    var attributes = _ref2.attributes,
      segments = _ref2.segments;

    if (typeof segments === 'undefined') {
      // vtt tracks may use single file in BaseURL
      segments = [{
        uri: attributes.baseUrl,
        timeline: attributes.periodIndex,
        resolvedUri: attributes.baseUrl || '',
        duration: attributes.sourceDuration,
        number: 0
      }];
      // targetDuration should be the same duration as the only segment
      attributes.duration = attributes.sourceDuration;
    }
    return {
      attributes: (_attributes2 = {
        NAME: attributes.id,
        BANDWIDTH: attributes.bandwidth
      }, _attributes2['PROGRAM-ID'] = 1, _attributes2),
      uri: '',
      endList: (attributes.type || 'static') === 'static',
      timeline: attributes.periodIndex,
      resolvedUri: attributes.baseUrl || '',
      targetDuration: attributes.duration,
      segments: segments,
      mediaSequence: segments.length ? segments[0].number : 1
    };
  };

  var organizeAudioPlaylists = function organizeAudioPlaylists(playlists) {
    return playlists.reduce(function (a, playlist) {
      var role = playlist.attributes.role && playlist.attributes.role.value || 'main';
      var language = playlist.attributes.lang || '';

      var label = 'main';

      if (language) {
        label = playlist.attributes.lang + ' (' + role + ')';
      }

      // skip if we already have the highest quality audio for a language
      if (a[label] && a[label].playlists[0].attributes.BANDWIDTH > playlist.attributes.bandwidth) {
        return a;
      }

      a[label] = {
        language: language,
        autoselect: true,
        default: role === 'main',
        playlists: [formatAudioPlaylist(playlist)],
        uri: ''
      };

      return a;
    }, {});
  };

  var organizeVttPlaylists = function organizeVttPlaylists(playlists) {
    return playlists.reduce(function (a, playlist) {
      var label = playlist.attributes.lang || 'text';

      // skip if we already have subtitles
      if (a[label]) {
        return a;
      }

      a[label] = {
        language: label,
        default: false,
        autoselect: false,
        playlists: [formatVttPlaylist(playlist)],
        uri: ''
      };

      return a;
    }, {});
  };

  var formatVideoPlaylist = function formatVideoPlaylist(_ref3) {
    var _attributes3;

    var attributes = _ref3.attributes,
      segments = _ref3.segments;

    var playlist = {
      attributes: (_attributes3 = {
        NAME: attributes.id,
        AUDIO: 'audio',
        SUBTITLES: 'subs',
        RESOLUTION: {
          width: attributes.width,
          height: attributes.height
        },
        CODECS: attributes.codecs,
        BANDWIDTH: attributes.bandwidth
      }, _attributes3['PROGRAM-ID'] = 1, _attributes3),
      uri: '',
      endList: (attributes.type || 'static') === 'static',
      timeline: attributes.periodIndex,
      resolvedUri: '',
      targetDuration: attributes.duration,
      segments: segments,
      mediaSequence: segments.length ? segments[0].number : 1
    };

    if (attributes.contentProtection) {
      playlist.contentProtection = attributes.contentProtection;
    }

    return playlist;
  };

  var toM3u8 = function toM3u8(dashPlaylists) {
    var _mediaGroups;

    if (!dashPlaylists.length) {
      return {};
    }

    // grab all master attributes
    var _dashPlaylists$0$attr = dashPlaylists[0].attributes,
      duration = _dashPlaylists$0$attr.sourceDuration,
      _dashPlaylists$0$attr2 = _dashPlaylists$0$attr.minimumUpdatePeriod,
      minimumUpdatePeriod = _dashPlaylists$0$attr2 === undefined ? 0 : _dashPlaylists$0$attr2;


    var videoOnly = function videoOnly(_ref4) {
      var attributes = _ref4.attributes;
      return attributes.mimeType === 'video/mp4' || attributes.contentType === 'video';
    };
    var audioOnly = function audioOnly(_ref5) {
      var attributes = _ref5.attributes;
      return attributes.mimeType === 'audio/mp4' || attributes.contentType === 'audio';
    };
    var vttOnly = function vttOnly(_ref6) {
      var attributes = _ref6.attributes;
      return attributes.mimeType === 'text/vtt' || attributes.contentType === 'text';
    };

    var videoPlaylists = dashPlaylists.filter(videoOnly).map(formatVideoPlaylist);
    var audioPlaylists = dashPlaylists.filter(audioOnly);
    var vttPlaylists = dashPlaylists.filter(vttOnly);

    var master = {
      allowCache: true,
      discontinuityStarts: [],
      segments: [],
      endList: true,
      mediaGroups: (_mediaGroups = {
        AUDIO: {},
        VIDEO: {}
      }, _mediaGroups['CLOSED-CAPTIONS'] = {}, _mediaGroups.SUBTITLES = {}, _mediaGroups),
      uri: '',
      duration: duration,
      playlists: videoPlaylists,
      minimumUpdatePeriod: minimumUpdatePeriod * 1000
    };

    if (audioPlaylists.length) {
      master.mediaGroups.AUDIO.audio = organizeAudioPlaylists(audioPlaylists);
    }

    if (vttPlaylists.length) {
      master.mediaGroups.SUBTITLES.subs = organizeVttPlaylists(vttPlaylists);
    }

    return master;
  };

  var isObject$1 = function isObject(obj) {
    return !!obj && (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object';
  };

  var merge = function merge() {
    for (var _len = arguments.length, objects = Array(_len), _key = 0; _key < _len; _key++) {
      objects[_key] = arguments[_key];
    }

    return objects.reduce(function (result, source) {

      Object.keys(source).forEach(function (key) {

        if (Array.isArray(result[key]) && Array.isArray(source[key])) {
          result[key] = result[key].concat(source[key]);
        } else if (isObject$1(result[key]) && isObject$1(source[key])) {
          result[key] = merge(result[key], source[key]);
        } else {
          result[key] = source[key];
        }
      });
      return result;
    }, {});
  };

  var resolveUrl = function resolveUrl(baseUrl, relativeUrl) {
    // return early if we don't need to resolve
    if (/^[a-z]+:/i.test(relativeUrl)) {
      return relativeUrl;
    }

    // if the base URL is relative then combine with the current location
    if (!/\/\//i.test(baseUrl)) {
      baseUrl = urlToolkit.buildAbsoluteURL(window_1.location.href, baseUrl);
    }

    return urlToolkit.buildAbsoluteURL(baseUrl, relativeUrl);
  };

  /**
   * @typedef {Object} SingleUri
   * @property {string} uri - relative location of segment
   * @property {string} resolvedUri - resolved location of segment
   * @property {Object} byterange - Object containing information on how to make byte range
   *   requests following byte-range-spec per RFC2616.
   * @property {String} byterange.length - length of range request
   * @property {String} byterange.offset - byte offset of range request
   *
   * @see https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1
   */

  /**
   * Converts a URLType node (5.3.9.2.3 Table 13) to a segment object
   * that conforms to how m3u8-parser is structured
   *
   * @see https://github.com/videojs/m3u8-parser
   *
   * @param {string} baseUrl - baseUrl provided by <BaseUrl> nodes
   * @param {string} source - source url for segment
   * @param {string} range - optional range used for range calls, follows
   * @return {SingleUri} full segment information transformed into a format similar
   *   to m3u8-parser
   */
  var urlTypeToSegment = function urlTypeToSegment(_ref7) {
    var _ref7$baseUrl = _ref7.baseUrl,
      baseUrl = _ref7$baseUrl === undefined ? '' : _ref7$baseUrl,
      _ref7$source = _ref7.source,
      source = _ref7$source === undefined ? '' : _ref7$source,
      _ref7$range = _ref7.range,
      range = _ref7$range === undefined ? '' : _ref7$range;

    var init = {
      uri: source,
      resolvedUri: resolveUrl(baseUrl || '', source)
    };

    if (range) {
      var ranges = range.split('-');
      var startRange = parseInt(ranges[0], 10);
      var endRange = parseInt(ranges[1], 10);

      init.byterange = {
        length: endRange - startRange,
        offset: startRange
      };
    }

    return init;
  };

  /**
   * Calculates the R (repetition) value for a live stream (for the final segment
   * in a manifest where the r value is negative 1)
   *
   * @param {Object} attributes
   *        Object containing all inherited attributes from parent elements with attribute
   *        names as keys
   * @param {number} time
   *        current time (typically the total time up until the final segment)
   * @param {number} duration
   *        duration property for the given <S />
   *
   * @return {number}
   *        R value to reach the end of the given period
   */
  var getLiveRValue = function getLiveRValue(attributes, time, duration) {
    var NOW = attributes.NOW,
      clientOffset = attributes.clientOffset,
      availabilityStartTime = attributes.availabilityStartTime,
      _attributes$timescale = attributes.timescale,
      timescale = _attributes$timescale === undefined ? 1 : _attributes$timescale,
      _attributes$start = attributes.start,
      start = _attributes$start === undefined ? 0 : _attributes$start,
      _attributes$minimumUp = attributes.minimumUpdatePeriod,
      minimumUpdatePeriod = _attributes$minimumUp === undefined ? 0 : _attributes$minimumUp;

    var now = (NOW + clientOffset) / 1000;
    var periodStartWC = availabilityStartTime + start;
    var periodEndWC = now + minimumUpdatePeriod;
    var periodDuration = periodEndWC - periodStartWC;

    return Math.ceil((periodDuration * timescale - time) / duration);
  };

  /**
   * Uses information provided by SegmentTemplate.SegmentTimeline to determine segment
   * timing and duration
   *
   * @param {Object} attributes
   *        Object containing all inherited attributes from parent elements with attribute
   *        names as keys
   * @param {Object[]} segmentTimeline
   *        List of objects representing the attributes of each S element contained within
   *
   * @return {{number: number, duration: number, time: number, timeline: number}[]}
   *         List of Objects with segment timing and duration info
   */
  var parseByTimeline = function parseByTimeline(attributes, segmentTimeline) {
    var _attributes$type = attributes.type,
      type = _attributes$type === undefined ? 'static' : _attributes$type,
      _attributes$minimumUp2 = attributes.minimumUpdatePeriod,
      minimumUpdatePeriod = _attributes$minimumUp2 === undefined ? 0 : _attributes$minimumUp2,
      _attributes$media = attributes.media,
      media = _attributes$media === undefined ? '' : _attributes$media,
      sourceDuration = attributes.sourceDuration,
      _attributes$timescale2 = attributes.timescale,
      timescale = _attributes$timescale2 === undefined ? 1 : _attributes$timescale2,
      _attributes$startNumb = attributes.startNumber,
      startNumber = _attributes$startNumb === undefined ? 1 : _attributes$startNumb,
      timeline = attributes.periodIndex;

    var segments = [];
    var time = -1;

    for (var sIndex = 0; sIndex < segmentTimeline.length; sIndex++) {
      var S = segmentTimeline[sIndex];
      var duration = S.d;
      var repeat = S.r || 0;
      var segmentTime = S.t || 0;

      if (time < 0) {
        // first segment
        time = segmentTime;
      }

      if (segmentTime && segmentTime > time) {
        // discontinuity

        // TODO: How to handle this type of discontinuity
        // timeline++ here would treat it like HLS discontuity and content would
        // get appended without gap
        // E.G.
        //  <S t="0" d="1" />
        //  <S d="1" />
        //  <S d="1" />
        //  <S t="5" d="1" />
        // would have $Time$ values of [0, 1, 2, 5]
        // should this be appened at time positions [0, 1, 2, 3],(#EXT-X-DISCONTINUITY)
        // or [0, 1, 2, gap, gap, 5]? (#EXT-X-GAP)
        // does the value of sourceDuration consider this when calculating arbitrary
        // negative @r repeat value?
        // E.G. Same elements as above with this added at the end
        //  <S d="1" r="-1" />
        //  with a sourceDuration of 10
        // Would the 2 gaps be included in the time duration calculations resulting in
        // 8 segments with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9] or 10 segments
        // with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9, 10, 11] ?

        time = segmentTime;
      }

      var count = void 0;

      if (repeat < 0) {
        var nextS = sIndex + 1;

        if (nextS === segmentTimeline.length) {
          // last segment
          if (type === 'dynamic' && minimumUpdatePeriod > 0 && media.indexOf('$Number$') > 0) {
            count = getLiveRValue(attributes, time, duration);
          } else {
            // TODO: This may be incorrect depending on conclusion of TODO above
            count = (sourceDuration * timescale - time) / duration;
          }
        } else {
          count = (segmentTimeline[nextS].t - time) / duration;
        }
      } else {
        count = repeat + 1;
      }

      var end = startNumber + segments.length + count;
      var number = startNumber + segments.length;

      while (number < end) {
        segments.push({number: number, duration: duration / timescale, time: time, timeline: timeline});
        time += duration;
        number++;
      }
    }

    return segments;
  };

  var range = function range(start, end) {
    var result = [];

    for (var i = start; i < end; i++) {
      result.push(i);
    }

    return result;
  };

  var flatten = function flatten(lists) {
    return lists.reduce(function (x, y) {
      return x.concat(y);
    }, []);
  };

  var from = function from(list) {
    if (!list.length) {
      return [];
    }

    var result = [];

    for (var i = 0; i < list.length; i++) {
      result.push(list[i]);
    }

    return result;
  };

  /**
   * Functions for calculating the range of available segments in static and dynamic
   * manifests.
   */
  var segmentRange = {
    /**
     * Returns the entire range of available segments for a static MPD
     *
     * @param {Object} attributes
     *        Inheritied MPD attributes
     * @return {{ start: number, end: number }}
     *         The start and end numbers for available segments
     */
    static: function _static(attributes) {
      var duration = attributes.duration,
        _attributes$timescale3 = attributes.timescale,
        timescale = _attributes$timescale3 === undefined ? 1 : _attributes$timescale3,
        sourceDuration = attributes.sourceDuration;


      return {
        start: 0,
        end: Math.ceil(sourceDuration / (duration / timescale))
      };
    },


    /**
     * Returns the current live window range of available segments for a dynamic MPD
     *
     * @param {Object} attributes
     *        Inheritied MPD attributes
     * @return {{ start: number, end: number }}
     *         The start and end numbers for available segments
     */
    dynamic: function dynamic(attributes) {
      var NOW = attributes.NOW,
        clientOffset = attributes.clientOffset,
        availabilityStartTime = attributes.availabilityStartTime,
        _attributes$timescale4 = attributes.timescale,
        timescale = _attributes$timescale4 === undefined ? 1 : _attributes$timescale4,
        duration = attributes.duration,
        _attributes$start2 = attributes.start,
        start = _attributes$start2 === undefined ? 0 : _attributes$start2,
        _attributes$minimumUp3 = attributes.minimumUpdatePeriod,
        minimumUpdatePeriod = _attributes$minimumUp3 === undefined ? 0 : _attributes$minimumUp3,
        _attributes$timeShift = attributes.timeShiftBufferDepth,
        timeShiftBufferDepth = _attributes$timeShift === undefined ? Infinity : _attributes$timeShift;

      var now = (NOW + clientOffset) / 1000;
      var periodStartWC = availabilityStartTime + start;
      var periodEndWC = now + minimumUpdatePeriod;
      var periodDuration = periodEndWC - periodStartWC;
      var segmentCount = Math.ceil(periodDuration * timescale / duration);
      var availableStart = Math.floor((now - periodStartWC - timeShiftBufferDepth) * timescale / duration);
      var availableEnd = Math.floor((now - periodStartWC) * timescale / duration);

      return {
        start: Math.max(0, availableStart),
        end: Math.min(segmentCount, availableEnd)
      };
    }
  };

  /**
   * Maps a range of numbers to objects with information needed to build the corresponding
   * segment list
   *
   * @name toSegmentsCallback
   * @function
   * @param {number} number
   *        Number of the segment
   * @param {number} index
   *        Index of the number in the range list
   * @return {{ number: Number, duration: Number, timeline: Number, time: Number }}
   *         Object with segment timing and duration info
   */

  /**
   * Returns a callback for Array.prototype.map for mapping a range of numbers to
   * information needed to build the segment list.
   *
   * @param {Object} attributes
   *        Inherited MPD attributes
   * @return {toSegmentsCallback}
   *         Callback map function
   */
  var toSegments = function toSegments(attributes) {
    return function (number, index) {
      var duration = attributes.duration,
        _attributes$timescale5 = attributes.timescale,
        timescale = _attributes$timescale5 === undefined ? 1 : _attributes$timescale5,
        periodIndex = attributes.periodIndex,
        _attributes$startNumb2 = attributes.startNumber,
        startNumber = _attributes$startNumb2 === undefined ? 1 : _attributes$startNumb2;


      return {
        number: startNumber + number,
        duration: duration / timescale,
        timeline: periodIndex,
        time: index * duration
      };
    };
  };

  /**
   * Returns a list of objects containing segment timing and duration info used for
   * building the list of segments. This uses the @duration attribute specified
   * in the MPD manifest to derive the range of segments.
   *
   * @param {Object} attributes
   *        Inherited MPD attributes
   * @return {{number: number, duration: number, time: number, timeline: number}[]}
   *         List of Objects with segment timing and duration info
   */
  var parseByDuration = function parseByDuration(attributes) {
    var _attributes$type2 = attributes.type,
      type = _attributes$type2 === undefined ? 'static' : _attributes$type2,
      duration = attributes.duration,
      _attributes$timescale6 = attributes.timescale,
      timescale = _attributes$timescale6 === undefined ? 1 : _attributes$timescale6,
      sourceDuration = attributes.sourceDuration;

    var _segmentRange$type = segmentRange[type](attributes),
      start = _segmentRange$type.start,
      end = _segmentRange$type.end;

    var segments = range(start, end).map(toSegments(attributes));

    if (type === 'static') {
      var index = segments.length - 1;

      // final segment may be less than full segment duration
      segments[index].duration = sourceDuration - duration / timescale * index;
    }

    return segments;
  };

  var identifierPattern = /\$([A-z]*)(?:(%0)([0-9]+)d)?\$/g;

  /**
   * Replaces template identifiers with corresponding values. To be used as the callback
   * for String.prototype.replace
   *
   * @name replaceCallback
   * @function
   * @param {string} match
   *        Entire match of identifier
   * @param {string} identifier
   *        Name of matched identifier
   * @param {string} format
   *        Format tag string. Its presence indicates that padding is expected
   * @param {string} width
   *        Desired length of the replaced value. Values less than this width shall be left
   *        zero padded
   * @return {string}
   *         Replacement for the matched identifier
   */

  /**
   * Returns a function to be used as a callback for String.prototype.replace to replace
   * template identifiers
   *
   * @param {Obect} values
   *        Object containing values that shall be used to replace known identifiers
   * @param {number} values.RepresentationID
   *        Value of the Representation@id attribute
   * @param {number} values.Number
   *        Number of the corresponding segment
   * @param {number} values.Bandwidth
   *        Value of the Representation@bandwidth attribute.
   * @param {number} values.Time
   *        Timestamp value of the corresponding segment
   * @return {replaceCallback}
   *         Callback to be used with String.prototype.replace to replace identifiers
   */
  var identifierReplacement = function identifierReplacement(values) {
    return function (match, identifier, format, width) {
      if (match === '$$') {
        // escape sequence
        return '$';
      }

      if (typeof values[identifier] === 'undefined') {
        return match;
      }

      var value = '' + values[identifier];

      if (identifier === 'RepresentationID') {
        // Format tag shall not be present with RepresentationID
        return value;
      }

      if (!format) {
        width = 1;
      } else {
        width = parseInt(width, 10);
      }

      if (value.length >= width) {
        return value;
      }

      return '' + new Array(width - value.length + 1).join('0') + value;
    };
  };

  /**
   * Constructs a segment url from a template string
   *
   * @param {string} url
   *        Template string to construct url from
   * @param {Obect} values
   *        Object containing values that shall be used to replace known identifiers
   * @param {number} values.RepresentationID
   *        Value of the Representation@id attribute
   * @param {number} values.Number
   *        Number of the corresponding segment
   * @param {number} values.Bandwidth
   *        Value of the Representation@bandwidth attribute.
   * @param {number} values.Time
   *        Timestamp value of the corresponding segment
   * @return {string}
   *         Segment url with identifiers replaced
   */
  var constructTemplateUrl = function constructTemplateUrl(url, values) {
    return url.replace(identifierPattern, identifierReplacement(values));
  };

  /**
   * Generates a list of objects containing timing and duration information about each
   * segment needed to generate segment uris and the complete segment object
   *
   * @param {Object} attributes
   *        Object containing all inherited attributes from parent elements with attribute
   *        names as keys
   * @param {Object[]|undefined} segmentTimeline
   *        List of objects representing the attributes of each S element contained within
   *        the SegmentTimeline element
   * @return {{number: number, duration: number, time: number, timeline: number}[]}
   *         List of Objects with segment timing and duration info
   */
  var parseTemplateInfo = function parseTemplateInfo(attributes, segmentTimeline) {
    if (!attributes.duration && !segmentTimeline) {
      // if neither @duration or SegmentTimeline are present, then there shall be exactly
      // one media segment
      return [{
        number: attributes.startNumber || 1,
        duration: attributes.sourceDuration,
        time: 0,
        timeline: attributes.periodIndex
      }];
    }

    if (attributes.duration) {
      return parseByDuration(attributes);
    }

    return parseByTimeline(attributes, segmentTimeline);
  };

  /**
   * Generates a list of segments using information provided by the SegmentTemplate element
   *
   * @param {Object} attributes
   *        Object containing all inherited attributes from parent elements with attribute
   *        names as keys
   * @param {Object[]|undefined} segmentTimeline
   *        List of objects representing the attributes of each S element contained within
   *        the SegmentTimeline element
   * @return {Object[]}
   *         List of segment objects
   */
  var segmentsFromTemplate = function segmentsFromTemplate(attributes, segmentTimeline) {
    var templateValues = {
      RepresentationID: attributes.id,
      Bandwidth: attributes.bandwidth || 0
    };

    var _attributes$initializ = attributes.initialization,
      initialization = _attributes$initializ === undefined ? {sourceURL: '', range: ''} : _attributes$initializ;


    var mapSegment = urlTypeToSegment({
      baseUrl: attributes.baseUrl,
      source: constructTemplateUrl(initialization.sourceURL, templateValues),
      range: initialization.range
    });

    var segments = parseTemplateInfo(attributes, segmentTimeline);

    return segments.map(function (segment) {
      templateValues.Number = segment.number;
      templateValues.Time = segment.time;

      var uri = constructTemplateUrl(attributes.media || '', templateValues);

      return {
        uri: uri,
        timeline: segment.timeline,
        duration: segment.duration,
        resolvedUri: resolveUrl(attributes.baseUrl || '', uri),
        map: mapSegment,
        number: segment.number
      };
    });
  };

  var errors = {
    INVALID_NUMBER_OF_PERIOD: 'INVALID_NUMBER_OF_PERIOD',
    DASH_EMPTY_MANIFEST: 'DASH_EMPTY_MANIFEST',
    DASH_INVALID_XML: 'DASH_INVALID_XML',
    NO_BASE_URL: 'NO_BASE_URL',
    MISSING_SEGMENT_INFORMATION: 'MISSING_SEGMENT_INFORMATION',
    SEGMENT_TIME_UNSPECIFIED: 'SEGMENT_TIME_UNSPECIFIED',
    UNSUPPORTED_UTC_TIMING_SCHEME: 'UNSUPPORTED_UTC_TIMING_SCHEME'
  };

  /**
   * Converts a <SegmentUrl> (of type URLType from the DASH spec 5.3.9.2 Table 14)
   * to an object that matches the output of a segment in videojs/mpd-parser
   *
   * @param {Object} attributes
   *   Object containing all inherited attributes from parent elements with attribute
   *   names as keys
   * @param {Object} segmentUrl
   *   <SegmentURL> node to translate into a segment object
   * @return {Object} translated segment object
   */
  var SegmentURLToSegmentObject = function SegmentURLToSegmentObject(attributes, segmentUrl) {
    var baseUrl = attributes.baseUrl,
      _attributes$initializ2 = attributes.initialization,
      initialization = _attributes$initializ2 === undefined ? {} : _attributes$initializ2;


    var initSegment = urlTypeToSegment({
      baseUrl: baseUrl,
      source: initialization.sourceURL,
      range: initialization.range
    });

    var segment = urlTypeToSegment({
      baseUrl: baseUrl,
      source: segmentUrl.media,
      range: segmentUrl.mediaRange
    });

    segment.map = initSegment;

    return segment;
  };

  /**
   * Generates a list of segments using information provided by the SegmentList element
   * SegmentList (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes.  Each
   * node should be translated into segment.
   *
   * @param {Object} attributes
   *   Object containing all inherited attributes from parent elements with attribute
   *   names as keys
   * @param {Object[]|undefined} segmentTimeline
   *        List of objects representing the attributes of each S element contained within
   *        the SegmentTimeline element
   * @return {Object.<Array>} list of segments
   */
  var segmentsFromList = function segmentsFromList(attributes, segmentTimeline) {
    var duration = attributes.duration,
      _attributes$segmentUr = attributes.segmentUrls,
      segmentUrls = _attributes$segmentUr === undefined ? [] : _attributes$segmentUr;

    // Per spec (5.3.9.2.1) no way to determine segment duration OR
    // if both SegmentTimeline and @duration are defined, it is outside of spec.

    if (!duration && !segmentTimeline || duration && segmentTimeline) {
      throw new Error(errors.SEGMENT_TIME_UNSPECIFIED);
    }

    var segmentUrlMap = segmentUrls.map(function (segmentUrlObject) {
      return SegmentURLToSegmentObject(attributes, segmentUrlObject);
    });
    var segmentTimeInfo = void 0;

    if (duration) {
      segmentTimeInfo = parseByDuration(attributes);
    }

    if (segmentTimeline) {
      segmentTimeInfo = parseByTimeline(attributes, segmentTimeline);
    }

    var segments = segmentTimeInfo.map(function (segmentTime, index) {
      if (segmentUrlMap[index]) {
        var segment = segmentUrlMap[index];

        segment.timeline = segmentTime.timeline;
        segment.duration = segmentTime.duration;
        segment.number = segmentTime.number;
        return segment;
      }
      // Since we're mapping we should get rid of any blank segments (in case
      // the given SegmentTimeline is handling for more elements than we have
      // SegmentURLs for).
    }).filter(function (segment) {
      return segment;
    });

    return segments;
  };

  /**
   * Translates SegmentBase into a set of segments.
   * (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes.  Each
   * node should be translated into segment.
   *
   * @param {Object} attributes
   *   Object containing all inherited attributes from parent elements with attribute
   *   names as keys
   * @return {Object.<Array>} list of segments
   */
  var segmentsFromBase = function segmentsFromBase(attributes) {
    var baseUrl = attributes.baseUrl,
      _attributes$initializ3 = attributes.initialization,
      initialization = _attributes$initializ3 === undefined ? {} : _attributes$initializ3,
      sourceDuration = attributes.sourceDuration,
      _attributes$timescale7 = attributes.timescale,
      timescale = _attributes$timescale7 === undefined ? 1 : _attributes$timescale7,
      _attributes$indexRang = attributes.indexRange,
      indexRange = _attributes$indexRang === undefined ? '' : _attributes$indexRang,
      duration = attributes.duration;

    // base url is required for SegmentBase to work, per spec (Section 5.3.9.2.1)

    if (!baseUrl) {
      throw new Error(errors.NO_BASE_URL);
    }

    var initSegment = urlTypeToSegment({
      baseUrl: baseUrl,
      source: initialization.sourceURL,
      range: initialization.range
    });
    var segment = urlTypeToSegment({baseUrl: baseUrl, source: baseUrl, range: indexRange});

    segment.map = initSegment;

    // If there is a duration, use it, otherwise use the given duration of the source
    // (since SegmentBase is only for one total segment)
    if (duration) {
      var segmentTimeInfo = parseByDuration(attributes);

      if (segmentTimeInfo.length) {
        segment.duration = segmentTimeInfo[0].duration;
        segment.timeline = segmentTimeInfo[0].timeline;
      }
    } else if (sourceDuration) {
      segment.duration = sourceDuration / timescale;
      segment.timeline = 0;
    }

    // This is used for mediaSequence
    segment.number = 0;

    return [segment];
  };

  var generateSegments = function generateSegments(_ref8) {
    var attributes = _ref8.attributes,
      segmentInfo = _ref8.segmentInfo;

    var segmentAttributes = void 0;
    var segmentsFn = void 0;

    if (segmentInfo.template) {
      segmentsFn = segmentsFromTemplate;
      segmentAttributes = merge(attributes, segmentInfo.template);
    } else if (segmentInfo.base) {
      segmentsFn = segmentsFromBase;
      segmentAttributes = merge(attributes, segmentInfo.base);
    } else if (segmentInfo.list) {
      segmentsFn = segmentsFromList;
      segmentAttributes = merge(attributes, segmentInfo.list);
    }

    if (!segmentsFn) {
      return {attributes: attributes};
    }

    var segments = segmentsFn(segmentAttributes, segmentInfo.timeline);

    // The @duration attribute will be used to determin the playlist's targetDuration which
    // must be in seconds. Since we've generated the segment list, we no longer need
    // @duration to be in @timescale units, so we can convert it here.
    if (segmentAttributes.duration) {
      var _segmentAttributes = segmentAttributes,
        duration = _segmentAttributes.duration,
        _segmentAttributes$ti = _segmentAttributes.timescale,
        timescale = _segmentAttributes$ti === undefined ? 1 : _segmentAttributes$ti;


      segmentAttributes.duration = duration / timescale;
    } else if (segments.length) {
      // if there is no @duration attribute, use the largest segment duration as
      // as target duration
      segmentAttributes.duration = segments.reduce(function (max, segment) {
        return Math.max(max, Math.ceil(segment.duration));
      }, 0);
    } else {
      segmentAttributes.duration = 0;
    }

    return {
      attributes: segmentAttributes,
      segments: segments
    };
  };

  var toPlaylists = function toPlaylists(representations) {
    return representations.map(generateSegments);
  };

  var findChildren = function findChildren(element, name) {
    return from(element.childNodes).filter(function (_ref9) {
      var tagName = _ref9.tagName;
      return tagName === name;
    });
  };

  var getContent = function getContent(element) {
    return element.textContent.trim();
  };

  var parseDuration = function parseDuration(str) {
    var SECONDS_IN_YEAR = 365 * 24 * 60 * 60;
    var SECONDS_IN_MONTH = 30 * 24 * 60 * 60;
    var SECONDS_IN_DAY = 24 * 60 * 60;
    var SECONDS_IN_HOUR = 60 * 60;
    var SECONDS_IN_MIN = 60;

    // P10Y10M10DT10H10M10.1S
    var durationRegex = /P(?:(\d*)Y)?(?:(\d*)M)?(?:(\d*)D)?(?:T(?:(\d*)H)?(?:(\d*)M)?(?:([\d.]*)S)?)?/;
    var match = durationRegex.exec(str);

    if (!match) {
      return 0;
    }

    var _match$slice = match.slice(1),
      year = _match$slice[0],
      month = _match$slice[1],
      day = _match$slice[2],
      hour = _match$slice[3],
      minute = _match$slice[4],
      second = _match$slice[5];

    return parseFloat(year || 0) * SECONDS_IN_YEAR + parseFloat(month || 0) * SECONDS_IN_MONTH + parseFloat(day || 0) * SECONDS_IN_DAY + parseFloat(hour || 0) * SECONDS_IN_HOUR + parseFloat(minute || 0) * SECONDS_IN_MIN + parseFloat(second || 0);
  };

  var parseDate = function parseDate(str) {
    // Date format without timezone according to ISO 8601
    // YYY-MM-DDThh:mm:ss.ssssss
    var dateRegex = /^\d+-\d+-\d+T\d+:\d+:\d+(\.\d+)?$/;

    // If the date string does not specifiy a timezone, we must specifiy UTC. This is
    // expressed by ending with 'Z'
    if (dateRegex.test(str)) {
      str += 'Z';
    }

    return Date.parse(str);
  };

  // TODO: maybe order these in some way that makes it easy to find specific attributes
  var parsers = {
    /**
     * Specifies the duration of the entire Media Presentation. Format is a duration string
     * as specified in ISO 8601
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The duration in seconds
     */
    mediaPresentationDuration: function mediaPresentationDuration(value) {
      return parseDuration(value);
    },


    /**
     * Specifies the Segment availability start time for all Segments referred to in this
     * MPD. For a dynamic manifest, it specifies the anchor for the earliest availability
     * time. Format is a date string as specified in ISO 8601
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The date as seconds from unix epoch
     */
    availabilityStartTime: function availabilityStartTime(value) {
      return parseDate(value) / 1000;
    },


    /**
     * Specifies the smallest period between potential changes to the MPD. Format is a
     * duration string as specified in ISO 8601
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The duration in seconds
     */
    minimumUpdatePeriod: function minimumUpdatePeriod(value) {
      return parseDuration(value);
    },


    /**
     * Specifies the duration of the smallest time shifting buffer for any Representation
     * in the MPD. Format is a duration string as specified in ISO 8601
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The duration in seconds
     */
    timeShiftBufferDepth: function timeShiftBufferDepth(value) {
      return parseDuration(value);
    },


    /**
     * Specifies the PeriodStart time of the Period relative to the availabilityStarttime.
     * Format is a duration string as specified in ISO 8601
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The duration in seconds
     */
    start: function start(value) {
      return parseDuration(value);
    },


    /**
     * Specifies the width of the visual presentation
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The parsed width
     */
    width: function width(value) {
      return parseInt(value, 10);
    },


    /**
     * Specifies the height of the visual presentation
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The parsed height
     */
    height: function height(value) {
      return parseInt(value, 10);
    },


    /**
     * Specifies the bitrate of the representation
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The parsed bandwidth
     */
    bandwidth: function bandwidth(value) {
      return parseInt(value, 10);
    },


    /**
     * Specifies the number of the first Media Segment in this Representation in the Period
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The parsed number
     */
    startNumber: function startNumber(value) {
      return parseInt(value, 10);
    },


    /**
     * Specifies the timescale in units per seconds
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The aprsed timescale
     */
    timescale: function timescale(value) {
      return parseInt(value, 10);
    },


    /**
     * Specifies the constant approximate Segment duration
     * NOTE: The <Period> element also contains an @duration attribute. This duration
     *       specifies the duration of the Period. This attribute is currently not
     *       supported by the rest of the parser, however we still check for it to prevent
     *       errors.
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The parsed duration
     */
    duration: function duration(value) {
      var parsedValue = parseInt(value, 10);

      if (isNaN(parsedValue)) {
        return parseDuration(value);
      }

      return parsedValue;
    },


    /**
     * Specifies the Segment duration, in units of the value of the @timescale.
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The parsed duration
     */
    d: function d(value) {
      return parseInt(value, 10);
    },


    /**
     * Specifies the MPD start time, in @timescale units, the first Segment in the series
     * starts relative to the beginning of the Period
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The parsed time
     */
    t: function t(value) {
      return parseInt(value, 10);
    },


    /**
     * Specifies the repeat count of the number of following contiguous Segments with the
     * same duration expressed by the value of @d
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {number}
     *         The parsed number
     */
    r: function r(value) {
      return parseInt(value, 10);
    },


    /**
     * Default parser for all other attributes. Acts as a no-op and just returns the value
     * as a string
     *
     * @param {string} value
     *        value of attribute as a string
     * @return {string}
     *         Unparsed value
     */
    DEFAULT: function DEFAULT(value) {
      return value;
    }
  };

  /**
   * Gets all the attributes and values of the provided node, parses attributes with known
   * types, and returns an object with attribute names mapped to values.
   *
   * @param {Node} el
   *        The node to parse attributes from
   * @return {Object}
   *         Object with all attributes of el parsed
   */
  var parseAttributes$1 = function parseAttributes(el) {
    if (!(el && el.attributes)) {
      return {};
    }

    return from(el.attributes).reduce(function (a, e) {
      var parseFn = parsers[e.name] || parsers.DEFAULT;

      a[e.name] = parseFn(e.value);

      return a;
    }, {});
  };

  function decodeB64ToUint8Array(b64Text) {
    var decodedString = window_1.atob(b64Text);
    var array = new Uint8Array(decodedString.length);

    for (var i = 0; i < decodedString.length; i++) {
      array[i] = decodedString.charCodeAt(i);
    }
    return array;
  }

  var keySystemsMap = {
    'urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b': 'org.w3.clearkey',
    'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed': 'com.widevine.alpha',
    'urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95': 'com.microsoft.playready',
    'urn:uuid:f239e769-efa3-4850-9c16-a903c6932efb': 'com.adobe.primetime'
  };

  /**
   * Builds a list of urls that is the product of the reference urls and BaseURL values
   *
   * @param {string[]} referenceUrls
   *        List of reference urls to resolve to
   * @param {Node[]} baseUrlElements
   *        List of BaseURL nodes from the mpd
   * @return {string[]}
   *         List of resolved urls
   */
  var buildBaseUrls = function buildBaseUrls(referenceUrls, baseUrlElements) {
    if (!baseUrlElements.length) {
      return referenceUrls;
    }

    return flatten(referenceUrls.map(function (reference) {
      return baseUrlElements.map(function (baseUrlElement) {
        return resolveUrl(reference, getContent(baseUrlElement));
      });
    }));
  };

  /**
   * Contains all Segment information for its containing AdaptationSet
   *
   * @typedef {Object} SegmentInformation
   * @property {Object|undefined} template
   *           Contains the attributes for the SegmentTemplate node
   * @property {Object[]|undefined} timeline
   *           Contains a list of atrributes for each S node within the SegmentTimeline node
   * @property {Object|undefined} list
   *           Contains the attributes for the SegmentList node
   * @property {Object|undefined} base
   *           Contains the attributes for the SegmentBase node
   */

  /**
   * Returns all available Segment information contained within the AdaptationSet node
   *
   * @param {Node} adaptationSet
   *        The AdaptationSet node to get Segment information from
   * @return {SegmentInformation}
   *         The Segment information contained within the provided AdaptationSet
   */
  var getSegmentInformation = function getSegmentInformation(adaptationSet) {
    var segmentTemplate = findChildren(adaptationSet, 'SegmentTemplate')[0];
    var segmentList = findChildren(adaptationSet, 'SegmentList')[0];
    var segmentUrls = segmentList && findChildren(segmentList, 'SegmentURL').map(function (s) {
      return merge({tag: 'SegmentURL'}, parseAttributes$1(s));
    });
    var segmentBase = findChildren(adaptationSet, 'SegmentBase')[0];
    var segmentTimelineParentNode = segmentList || segmentTemplate;
    var segmentTimeline = segmentTimelineParentNode && findChildren(segmentTimelineParentNode, 'SegmentTimeline')[0];
    var segmentInitializationParentNode = segmentList || segmentBase || segmentTemplate;
    var segmentInitialization = segmentInitializationParentNode && findChildren(segmentInitializationParentNode, 'Initialization')[0];

    // SegmentTemplate is handled slightly differently, since it can have both
    // @initialization and an <Initialization> node.  @initialization can be templated,
    // while the node can have a url and range specified.  If the <SegmentTemplate> has
    // both @initialization and an <Initialization> subelement we opt to override with
    // the node, as this interaction is not defined in the spec.
    var template = segmentTemplate && parseAttributes$1(segmentTemplate);

    if (template && segmentInitialization) {
      template.initialization = segmentInitialization && parseAttributes$1(segmentInitialization);
    } else if (template && template.initialization) {
      // If it is @initialization we convert it to an object since this is the format that
      // later functions will rely on for the initialization segment.  This is only valid
      // for <SegmentTemplate>
      template.initialization = {sourceURL: template.initialization};
    }

    var segmentInfo = {
      template: template,
      timeline: segmentTimeline && findChildren(segmentTimeline, 'S').map(function (s) {
        return parseAttributes$1(s);
      }),
      list: segmentList && merge(parseAttributes$1(segmentList), {
        segmentUrls: segmentUrls,
        initialization: parseAttributes$1(segmentInitialization)
      }),
      base: segmentBase && merge(parseAttributes$1(segmentBase), {
        initialization: parseAttributes$1(segmentInitialization)
      })
    };

    Object.keys(segmentInfo).forEach(function (key) {
      if (!segmentInfo[key]) {
        delete segmentInfo[key];
      }
    });

    return segmentInfo;
  };

  /**
   * Contains Segment information and attributes needed to construct a Playlist object
   * from a Representation
   *
   * @typedef {Object} RepresentationInformation
   * @property {SegmentInformation} segmentInfo
   *           Segment information for this Representation
   * @property {Object} attributes
   *           Inherited attributes for this Representation
   */

  /**
   * Maps a Representation node to an object containing Segment information and attributes
   *
   * @name inheritBaseUrlsCallback
   * @function
   * @param {Node} representation
   *        Representation node from the mpd
   * @return {RepresentationInformation}
   *         Representation information needed to construct a Playlist object
   */

  /**
   * Returns a callback for Array.prototype.map for mapping Representation nodes to
   * Segment information and attributes using inherited BaseURL nodes.
   *
   * @param {Object} adaptationSetAttributes
   *        Contains attributes inherited by the AdaptationSet
   * @param {string[]} adaptationSetBaseUrls
   *        Contains list of resolved base urls inherited by the AdaptationSet
   * @param {SegmentInformation} adaptationSetSegmentInfo
   *        Contains Segment information for the AdaptationSet
   * @return {inheritBaseUrlsCallback}
   *         Callback map function
   */
  var inheritBaseUrls = function inheritBaseUrls(adaptationSetAttributes, adaptationSetBaseUrls, adaptationSetSegmentInfo) {
    return function (representation) {
      var repBaseUrlElements = findChildren(representation, 'BaseURL');
      var repBaseUrls = buildBaseUrls(adaptationSetBaseUrls, repBaseUrlElements);
      var attributes = merge(adaptationSetAttributes, parseAttributes$1(representation));
      var representationSegmentInfo = getSegmentInformation(representation);

      return repBaseUrls.map(function (baseUrl) {
        return {
          segmentInfo: merge(adaptationSetSegmentInfo, representationSegmentInfo),
          attributes: merge(attributes, {baseUrl: baseUrl})
        };
      });
    };
  };

  /**
   * Tranforms a series of content protection nodes to
   * an object containing pssh data by key system
   *
   * @param {Node[]} contentProtectionNodes
   *        Content protection nodes
   * @return {Object}
   *        Object containing pssh data by key system
   */
  var generateKeySystemInformation = function generateKeySystemInformation(contentProtectionNodes) {
    return contentProtectionNodes.reduce(function (acc, node) {
      var attributes = parseAttributes$1(node);
      var keySystem = keySystemsMap[attributes.schemeIdUri];

      if (keySystem) {
        acc[keySystem] = {attributes: attributes};

        var psshNode = findChildren(node, 'cenc:pssh')[0];

        if (psshNode) {
          var pssh = getContent(psshNode);
          var psshBuffer = pssh && decodeB64ToUint8Array(pssh);

          acc[keySystem].pssh = psshBuffer;
        }
      }

      return acc;
    }, {});
  };

  /**
   * Maps an AdaptationSet node to a list of Representation information objects
   *
   * @name toRepresentationsCallback
   * @function
   * @param {Node} adaptationSet
   *        AdaptationSet node from the mpd
   * @return {RepresentationInformation[]}
   *         List of objects containing Representaion information
   */

  /**
   * Returns a callback for Array.prototype.map for mapping AdaptationSet nodes to a list of
   * Representation information objects
   *
   * @param {Object} periodAttributes
   *        Contains attributes inherited by the Period
   * @param {string[]} periodBaseUrls
   *        Contains list of resolved base urls inherited by the Period
   * @param {string[]} periodSegmentInfo
   *        Contains Segment Information at the period level
   * @return {toRepresentationsCallback}
   *         Callback map function
   */
  var toRepresentations = function toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo) {
    return function (adaptationSet) {
      var adaptationSetAttributes = parseAttributes$1(adaptationSet);
      var adaptationSetBaseUrls = buildBaseUrls(periodBaseUrls, findChildren(adaptationSet, 'BaseURL'));
      var role = findChildren(adaptationSet, 'Role')[0];
      var roleAttributes = {role: parseAttributes$1(role)};

      var attrs = merge(periodAttributes, adaptationSetAttributes, roleAttributes);

      var contentProtection = generateKeySystemInformation(findChildren(adaptationSet, 'ContentProtection'));

      if (Object.keys(contentProtection).length) {
        attrs = merge(attrs, {contentProtection: contentProtection});
      }

      var segmentInfo = getSegmentInformation(adaptationSet);
      var representations = findChildren(adaptationSet, 'Representation');
      var adaptationSetSegmentInfo = merge(periodSegmentInfo, segmentInfo);

      return flatten(representations.map(inheritBaseUrls(attrs, adaptationSetBaseUrls, adaptationSetSegmentInfo)));
    };
  };

  /**
   * Maps an Period node to a list of Representation inforamtion objects for all
   * AdaptationSet nodes contained within the Period
   *
   * @name toAdaptationSetsCallback
   * @function
   * @param {Node} period
   *        Period node from the mpd
   * @param {number} periodIndex
   *        Index of the Period within the mpd
   * @return {RepresentationInformation[]}
   *         List of objects containing Representaion information
   */

  /**
   * Returns a callback for Array.prototype.map for mapping Period nodes to a list of
   * Representation information objects
   *
   * @param {Object} mpdAttributes
   *        Contains attributes inherited by the mpd
   * @param {string[]} mpdBaseUrls
   *        Contains list of resolved base urls inherited by the mpd
   * @return {toAdaptationSetsCallback}
   *         Callback map function
   */
  var toAdaptationSets = function toAdaptationSets(mpdAttributes, mpdBaseUrls) {
    return function (period, periodIndex) {
      var periodBaseUrls = buildBaseUrls(mpdBaseUrls, findChildren(period, 'BaseURL'));
      var periodAtt = parseAttributes$1(period);
      var periodAttributes = merge(mpdAttributes, periodAtt, {periodIndex: periodIndex});
      var adaptationSets = findChildren(period, 'AdaptationSet');
      var periodSegmentInfo = getSegmentInformation(period);

      return flatten(adaptationSets.map(toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo)));
    };
  };

  /**
   * Traverses the mpd xml tree to generate a list of Representation information objects
   * that have inherited attributes from parent nodes
   *
   * @param {Node} mpd
   *        The root node of the mpd
   * @param {Object} options
   *        Available options for inheritAttributes
   * @param {string} options.manifestUri
   *        The uri source of the mpd
   * @param {number} options.NOW
   *        Current time per DASH IOP.  Default is current time in ms since epoch
   * @param {number} options.clientOffset
   *        Client time difference from NOW (in milliseconds)
   * @return {RepresentationInformation[]}
   *         List of objects containing Representation information
   */
  var inheritAttributes = function inheritAttributes(mpd) {
    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    var _options$manifestUri = options.manifestUri,
      manifestUri = _options$manifestUri === undefined ? '' : _options$manifestUri,
      _options$NOW = options.NOW,
      NOW = _options$NOW === undefined ? Date.now() : _options$NOW,
      _options$clientOffset = options.clientOffset,
      clientOffset = _options$clientOffset === undefined ? 0 : _options$clientOffset;

    var periods = findChildren(mpd, 'Period');

    if (periods.length !== 1) {
      // TODO add support for multiperiod
      throw new Error(errors.INVALID_NUMBER_OF_PERIOD);
    }

    var mpdAttributes = parseAttributes$1(mpd);
    var mpdBaseUrls = buildBaseUrls([manifestUri], findChildren(mpd, 'BaseURL'));

    mpdAttributes.sourceDuration = mpdAttributes.mediaPresentationDuration || 0;
    mpdAttributes.NOW = NOW;
    mpdAttributes.clientOffset = clientOffset;

    return flatten(periods.map(toAdaptationSets(mpdAttributes, mpdBaseUrls)));
  };

  var stringToMpdXml = function stringToMpdXml(manifestString) {
    if (manifestString === '') {
      throw new Error(errors.DASH_EMPTY_MANIFEST);
    }

    var parser = new window_1.DOMParser();
    var xml = parser.parseFromString(manifestString, 'application/xml');
    var mpd = xml && xml.documentElement.tagName === 'MPD' ? xml.documentElement : null;

    if (!mpd || mpd && mpd.getElementsByTagName('parsererror').length > 0) {
      throw new Error(errors.DASH_INVALID_XML);
    }

    return mpd;
  };

  /**
   * Parses the manifest for a UTCTiming node, returning the nodes attributes if found
   *
   * @param {string} mpd
   *        XML string of the MPD manifest
   * @return {Object|null}
   *         Attributes of UTCTiming node specified in the manifest. Null if none found
   */
  var parseUTCTimingScheme = function parseUTCTimingScheme(mpd) {
    var UTCTimingNode = findChildren(mpd, 'UTCTiming')[0];

    if (!UTCTimingNode) {
      return null;
    }

    var attributes = parseAttributes$1(UTCTimingNode);

    switch (attributes.schemeIdUri) {
      case 'urn:mpeg:dash:utc:http-head:2014':
      case 'urn:mpeg:dash:utc:http-head:2012':
        attributes.method = 'HEAD';
        break;
      case 'urn:mpeg:dash:utc:http-xsdate:2014':
      case 'urn:mpeg:dash:utc:http-iso:2014':
      case 'urn:mpeg:dash:utc:http-xsdate:2012':
      case 'urn:mpeg:dash:utc:http-iso:2012':
        attributes.method = 'GET';
        break;
      case 'urn:mpeg:dash:utc:direct:2014':
      case 'urn:mpeg:dash:utc:direct:2012':
        attributes.method = 'DIRECT';
        attributes.value = Date.parse(attributes.value);
        break;
      case 'urn:mpeg:dash:utc:http-ntp:2014':
      case 'urn:mpeg:dash:utc:ntp:2014':
      case 'urn:mpeg:dash:utc:sntp:2014':
      default:
        throw new Error(errors.UNSUPPORTED_UTC_TIMING_SCHEME);
    }

    return attributes;
  };

  var parse = function parse(manifestString, options) {
    return toM3u8(toPlaylists(inheritAttributes(stringToMpdXml(manifestString), options)));
  };

  /**
   * Parses the manifest for a UTCTiming node, returning the nodes attributes if found
   *
   * @param {string} manifestString
   *        XML string of the MPD manifest
   * @return {Object|null}
   *         Attributes of UTCTiming node specified in the manifest. Null if none found
   */
  var parseUTCTiming = function parseUTCTiming(manifestString) {
    return parseUTCTimingScheme(stringToMpdXml(manifestString));
  };

  var toUnsigned = function toUnsigned(value) {
    return value >>> 0;
  };

  var bin = {
    toUnsigned: toUnsigned
  };
  var bin_1 = bin.toUnsigned;

  var bin$1 = /*#__PURE__*/Object.freeze({
    default: bin,
    __moduleExports: bin,
    toUnsigned: bin_1
  });

  var require$$0$1 = (bin$1 && bin) || bin$1;

  var toUnsigned$1 = require$$0$1.toUnsigned;
  var _findBox, parseType, timescale, startTime;

  // Find the data for a box specified by its path
  _findBox = function findBox(data, path) {
    var results = [],
      i,
      size,
      type,
      end,
      subresults;

    if (!path.length) {
      // short-circuit the search for empty paths
      return null;
    }

    for (i = 0; i < data.byteLength;) {
      size = toUnsigned$1(data[i] << 24 | data[i + 1] << 16 | data[i + 2] << 8 | data[i + 3]);

      type = parseType(data.subarray(i + 4, i + 8));

      end = size > 1 ? i + size : data.byteLength;

      if (type === path[0]) {
        if (path.length === 1) {
          // this is the end of the path and we've found the box we were
          // looking for
          results.push(data.subarray(i + 8, end));
        } else {
          // recursively search for the next box along the path
          subresults = _findBox(data.subarray(i + 8, end), path.slice(1));
          if (subresults.length) {
            results = results.concat(subresults);
          }
        }
      }
      i = end;
    }

    // we've finished searching all of data
    return results;
  };

  /**
   * Returns the string representation of an ASCII encoded four byte buffer.
   * @param buffer {Uint8Array} a four-byte buffer to translate
   * @return {string} the corresponding string
   */
  parseType = function parseType(buffer) {
    var result = '';
    result += String.fromCharCode(buffer[0]);
    result += String.fromCharCode(buffer[1]);
    result += String.fromCharCode(buffer[2]);
    result += String.fromCharCode(buffer[3]);
    return result;
  };

  /**
   * Parses an MP4 initialization segment and extracts the timescale
   * values for any declared tracks. Timescale values indicate the
   * number of clock ticks per second to assume for time-based values
   * elsewhere in the MP4.
   *
   * To determine the start time of an MP4, you need two pieces of
   * information: the timescale unit and the earliest base media decode
   * time. Multiple timescales can be specified within an MP4 but the
   * base media decode time is always expressed in the timescale from
   * the media header box for the track:
   * ```
   * moov > trak > mdia > mdhd.timescale
   * ```
   * @param init {Uint8Array} the bytes of the init segment
   * @return {object} a hash of track ids to timescale values or null if
   * the init segment is malformed.
   */
  timescale = function timescale(init) {
    var result = {},
      traks = _findBox(init, ['moov', 'trak']);

    // mdhd timescale
    return traks.reduce(function (result, trak) {
      var tkhd, version, index, id, mdhd;

      tkhd = _findBox(trak, ['tkhd'])[0];
      if (!tkhd) {
        return null;
      }
      version = tkhd[0];
      index = version === 0 ? 12 : 20;
      id = toUnsigned$1(tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]);

      mdhd = _findBox(trak, ['mdia', 'mdhd'])[0];
      if (!mdhd) {
        return null;
      }
      version = mdhd[0];
      index = version === 0 ? 12 : 20;
      result[id] = toUnsigned$1(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);
      return result;
    }, result);
  };

  /**
   * Determine the base media decode start time, in seconds, for an MP4
   * fragment. If multiple fragments are specified, the earliest time is
   * returned.
   *
   * The base media decode time can be parsed from track fragment
   * metadata:
   * ```
   * moof > traf > tfdt.baseMediaDecodeTime
   * ```
   * It requires the timescale value from the mdhd to interpret.
   *
   * @param timescale {object} a hash of track ids to timescale values.
   * @return {number} the earliest base media decode start time for the
   * fragment, in seconds
   */
  startTime = function startTime(timescale, fragment) {
    var trafs, baseTimes, result;

    // we need info from two childrend of each track fragment box
    trafs = _findBox(fragment, ['moof', 'traf']);

    // determine the start times for each track
    baseTimes = [].concat.apply([], trafs.map(function (traf) {
      return _findBox(traf, ['tfhd']).map(function (tfhd) {
        var id, scale, baseTime;

        // get the track id from the tfhd
        id = toUnsigned$1(tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]);
        // assume a 90kHz clock if no timescale was specified
        scale = timescale[id] || 90e3;

        // get the base media decode time from the tfdt
        baseTime = _findBox(traf, ['tfdt']).map(function (tfdt) {
          var version, result;

          version = tfdt[0];
          result = toUnsigned$1(tfdt[4] << 24 | tfdt[5] << 16 | tfdt[6] << 8 | tfdt[7]);
          if (version === 1) {
            result *= Math.pow(2, 32);
            result += toUnsigned$1(tfdt[8] << 24 | tfdt[9] << 16 | tfdt[10] << 8 | tfdt[11]);
          }
          return result;
        })[0];
        baseTime = baseTime || Infinity;

        // convert base time to seconds
        return baseTime / scale;
      });
    }));

    // return the minimum
    result = Math.min.apply(null, baseTimes);
    return isFinite(result) ? result : 0;
  };

  var probe = {
    parseType: parseType,
    timescale: timescale,
    startTime: startTime
  };

  var streamTypes = {
    H264_STREAM_TYPE: 0x1B,
    ADTS_STREAM_TYPE: 0x0F,
    METADATA_STREAM_TYPE: 0x15
  };
  var streamTypes_1 = streamTypes.H264_STREAM_TYPE;
  var streamTypes_2 = streamTypes.ADTS_STREAM_TYPE;
  var streamTypes_3 = streamTypes.METADATA_STREAM_TYPE;

  var streamTypes$1 = /*#__PURE__*/Object.freeze({
    default: streamTypes,
    __moduleExports: streamTypes,
    H264_STREAM_TYPE: streamTypes_1,
    ADTS_STREAM_TYPE: streamTypes_2,
    METADATA_STREAM_TYPE: streamTypes_3
  });

  /**
   * mux.js
   *
   * Copyright (c) 2014 Brightcove
   * All rights reserved.
   *
   * A lightweight readable stream implemention that handles event dispatching.
   * Objects that inherit from streams should call init in their constructors.
   */

  var Stream$1 = function Stream() {
    this.init = function () {
      var listeners = {};
      /**
       * Add a listener for a specified event type.
       * @param type {string} the event name
       * @param listener {function} the callback to be invoked when an event of
       * the specified type occurs
       */
      this.on = function (type, listener) {
        if (!listeners[type]) {
          listeners[type] = [];
        }
        listeners[type] = listeners[type].concat(listener);
      };
      /**
       * Remove a listener for a specified event type.
       * @param type {string} the event name
       * @param listener {function} a function previously registered for this
       * type of event through `on`
       */
      this.off = function (type, listener) {
        var index;
        if (!listeners[type]) {
          return false;
        }
        index = listeners[type].indexOf(listener);
        listeners[type] = listeners[type].slice();
        listeners[type].splice(index, 1);
        return index > -1;
      };
      /**
       * Trigger an event of the specified type on this stream. Any additional
       * arguments to this function are passed as parameters to event listeners.
       * @param type {string} the event name
       */
      this.trigger = function (type) {
        var callbacks, i, length, args;
        callbacks = listeners[type];
        if (!callbacks) {
          return;
        }
        // Slicing the arguments on every invocation of this method
        // can add a significant amount of overhead. Avoid the
        // intermediate object creation for the common case of a
        // single callback argument
        if (arguments.length === 2) {
          length = callbacks.length;
          for (i = 0; i < length; ++i) {
            callbacks[i].call(this, arguments[1]);
          }
        } else {
          args = [];
          i = arguments.length;
          for (i = 1; i < arguments.length; ++i) {
            args.push(arguments[i]);
          }
          length = callbacks.length;
          for (i = 0; i < length; ++i) {
            callbacks[i].apply(this, args);
          }
        }
      };
      /**
       * Destroys the stream and cleans up.
       */
      this.dispose = function () {
        listeners = {};
      };
    };
  };

  /**
   * Forwards all `data` events on this stream to the destination stream. The
   * destination stream should provide a method `push` to receive the data
   * events as they arrive.
   * @param destination {stream} the stream that will receive all `data` events
   * @param autoFlush {boolean} if false, we will not call `flush` on the destination
   *                            when the current stream emits a 'done' event
   * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options
   */
  Stream$1.prototype.pipe = function (destination) {
    this.on('data', function (data) {
      destination.push(data);
    });

    this.on('done', function (flushSource) {
      destination.flush(flushSource);
    });

    return destination;
  };

  // Default stream functions that are expected to be overridden to perform
  // actual work. These are provided by the prototype as a sort of no-op
  // implementation so that we don't have to check for their existence in the
  // `pipe` function above.
  Stream$1.prototype.push = function (data) {
    this.trigger('data', data);
  };

  Stream$1.prototype.flush = function (flushSource) {
    this.trigger('done', flushSource);
  };

  var stream = Stream$1;

  var stream$1 = /*#__PURE__*/Object.freeze({
    default: stream,
    __moduleExports: stream
  });

  var Stream$2 = (stream$1 && stream) || stream$1;

  var MAX_TS = 8589934592;

  var RO_THRESH = 4294967296;

  var handleRollover = function handleRollover(value, reference) {
    var direction = 1;

    if (value > reference) {
      // If the current timestamp value is greater than our reference timestamp and we detect a
      // timestamp rollover, this means the roll over is happening in the opposite direction.
      // Example scenario: Enter a long stream/video just after a rollover occurred. The reference
      // point will be set to a small number, e.g. 1. The user then seeks backwards over the
      // rollover point. In loading this segment, the timestamp values will be very large,
      // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust
      // the time stamp to be `value - 2^33`.
      direction = -1;
    }

    // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will
    // cause an incorrect adjustment.
    while (Math.abs(reference - value) > RO_THRESH) {
      value += direction * MAX_TS;
    }

    return value;
  };

  var TimestampRolloverStream = function TimestampRolloverStream(type) {
    var lastDTS, referenceDTS;

    TimestampRolloverStream.prototype.init.call(this);

    this.type_ = type;

    this.push = function (data) {
      if (data.type !== this.type_) {
        return;
      }

      if (referenceDTS === undefined) {
        referenceDTS = data.dts;
      }

      data.dts = handleRollover(data.dts, referenceDTS);
      data.pts = handleRollover(data.pts, referenceDTS);

      lastDTS = data.dts;

      this.trigger('data', data);
    };

    this.flush = function () {
      referenceDTS = lastDTS;
      this.trigger('done');
    };

    this.discontinuity = function () {
      referenceDTS = void 0;
      lastDTS = void 0;
    };
  };

  TimestampRolloverStream.prototype = new Stream$2();

  var timestampRolloverStream = {
    TimestampRolloverStream: TimestampRolloverStream,
    handleRollover: handleRollover
  };
  var timestampRolloverStream_1 = timestampRolloverStream.TimestampRolloverStream;
  var timestampRolloverStream_2 = timestampRolloverStream.handleRollover;

  var timestampRolloverStream$1 = /*#__PURE__*/Object.freeze({
    default: timestampRolloverStream,
    __moduleExports: timestampRolloverStream,
    TimestampRolloverStream: timestampRolloverStream_1,
    handleRollover: timestampRolloverStream_2
  });

  var StreamTypes = (streamTypes$1 && streamTypes) || streamTypes$1;

  var parsePid = function parsePid(packet) {
    var pid = packet[1] & 0x1f;
    pid <<= 8;
    pid |= packet[2];
    return pid;
  };

  var parsePayloadUnitStartIndicator = function parsePayloadUnitStartIndicator(packet) {
    return !!(packet[1] & 0x40);
  };

  var parseAdaptionField = function parseAdaptionField(packet) {
    var offset = 0;
    // if an adaption field is present, its length is specified by the
    // fifth byte of the TS packet header. The adaptation field is
    // used to add stuffing to PES packets that don't fill a complete
    // TS packet, and to specify some forms of timing and control data
    // that we do not currently use.
    if ((packet[3] & 0x30) >>> 4 > 0x01) {
      offset += packet[4] + 1;
    }
    return offset;
  };

  var parseType$1 = function parseType(packet, pmtPid) {
    var pid = parsePid(packet);
    if (pid === 0) {
      return 'pat';
    } else if (pid === pmtPid) {
      return 'pmt';
    } else if (pmtPid) {
      return 'pes';
    }
    return null;
  };

  var parsePat = function parsePat(packet) {
    var pusi = parsePayloadUnitStartIndicator(packet);
    var offset = 4 + parseAdaptionField(packet);

    if (pusi) {
      offset += packet[offset] + 1;
    }

    return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];
  };

  var parsePmt = function parsePmt(packet) {
    var programMapTable = {};
    var pusi = parsePayloadUnitStartIndicator(packet);
    var payloadOffset = 4 + parseAdaptionField(packet);

    if (pusi) {
      payloadOffset += packet[payloadOffset] + 1;
    }

    // PMTs can be sent ahead of the time when they should actually
    // take effect. We don't believe this should ever be the case
    // for HLS but we'll ignore "forward" PMT declarations if we see
    // them. Future PMT declarations have the current_next_indicator
    // set to zero.
    if (!(packet[payloadOffset + 5] & 0x01)) {
      return;
    }

    var sectionLength, tableEnd, programInfoLength;
    // the mapping table ends at the end of the current section
    sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];
    tableEnd = 3 + sectionLength - 4;

    // to determine where the table is, we have to figure out how
    // long the program info descriptors are
    programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11];

    // advance the offset to the first entry in the mapping table
    var offset = 12 + programInfoLength;
    while (offset < tableEnd) {
      var i = payloadOffset + offset;
      // add an entry that maps the elementary_pid to the stream_type
      programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i];

      // move to the next table entry
      // skip past the elementary stream descriptors, if present
      offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;
    }
    return programMapTable;
  };

  var parsePesType = function parsePesType(packet, programMapTable) {
    var pid = parsePid(packet);
    var type = programMapTable[pid];
    switch (type) {
      case StreamTypes.H264_STREAM_TYPE:
        return 'video';
      case StreamTypes.ADTS_STREAM_TYPE:
        return 'audio';
      case StreamTypes.METADATA_STREAM_TYPE:
        return 'timed-metadata';
      default:
        return null;
    }
  };

  var parsePesTime = function parsePesTime(packet) {
    var pusi = parsePayloadUnitStartIndicator(packet);
    if (!pusi) {
      return null;
    }

    var offset = 4 + parseAdaptionField(packet);

    if (offset >= packet.byteLength) {
      // From the H 222.0 MPEG-TS spec
      // "For transport stream packets carrying PES packets, stuffing is needed when there
      //  is insufficient PES packet data to completely fill the transport stream packet
      //  payload bytes. Stuffing is accomplished by defining an adaptation field longer than
      //  the sum of the lengths of the data elements in it, so that the payload bytes
      //  remaining after the adaptation field exactly accommodates the available PES packet
      //  data."
      //
      // If the offset is >= the length of the packet, then the packet contains no data
      // and instead is just adaption field stuffing bytes
      return null;
    }

    var pes = null;
    var ptsDtsFlags;

    // PES packets may be annotated with a PTS value, or a PTS value
    // and a DTS value. Determine what combination of values is
    // available to work with.
    ptsDtsFlags = packet[offset + 7];

    // PTS and DTS are normally stored as a 33-bit number.  Javascript
    // performs all bitwise operations on 32-bit integers but javascript
    // supports a much greater range (52-bits) of integer using standard
    // mathematical operations.
    // We construct a 31-bit value using bitwise operators over the 31
    // most significant bits and then multiply by 4 (equal to a left-shift
    // of 2) before we add the final 2 least significant bits of the
    // timestamp (equal to an OR.)
    if (ptsDtsFlags & 0xC0) {
      pes = {};
      // the PTS and DTS are not written out directly. For information
      // on how they are encoded, see
      // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html
      pes.pts = (packet[offset + 9] & 0x0E) << 27 | (packet[offset + 10] & 0xFF) << 20 | (packet[offset + 11] & 0xFE) << 12 | (packet[offset + 12] & 0xFF) << 5 | (packet[offset + 13] & 0xFE) >>> 3;
      pes.pts *= 4; // Left shift by 2
      pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs
      pes.dts = pes.pts;
      if (ptsDtsFlags & 0x40) {
        pes.dts = (packet[offset + 14] & 0x0E) << 27 | (packet[offset + 15] & 0xFF) << 20 | (packet[offset + 16] & 0xFE) << 12 | (packet[offset + 17] & 0xFF) << 5 | (packet[offset + 18] & 0xFE) >>> 3;
        pes.dts *= 4; // Left shift by 2
        pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs
      }
    }
    return pes;
  };

  var parseNalUnitType = function parseNalUnitType(type) {
    switch (type) {
      case 0x05:
        return 'slice_layer_without_partitioning_rbsp_idr';
      case 0x06:
        return 'sei_rbsp';
      case 0x07:
        return 'seq_parameter_set_rbsp';
      case 0x08:
        return 'pic_parameter_set_rbsp';
      case 0x09:
        return 'access_unit_delimiter_rbsp';
      default:
        return null;
    }
  };

  var videoPacketContainsKeyFrame = function videoPacketContainsKeyFrame(packet) {
    var offset = 4 + parseAdaptionField(packet);
    var frameBuffer = packet.subarray(offset);
    var frameI = 0;
    var frameSyncPoint = 0;
    var foundKeyFrame = false;
    var nalType;

    // advance the sync point to a NAL start, if necessary
    for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {
      if (frameBuffer[frameSyncPoint + 2] === 1) {
        // the sync point is properly aligned
        frameI = frameSyncPoint + 5;
        break;
      }
    }

    while (frameI < frameBuffer.byteLength) {
      // look at the current byte to determine if we've hit the end of
      // a NAL unit boundary
      switch (frameBuffer[frameI]) {
        case 0:
          // skip past non-sync sequences
          if (frameBuffer[frameI - 1] !== 0) {
            frameI += 2;
            break;
          } else if (frameBuffer[frameI - 2] !== 0) {
            frameI++;
            break;
          }

          if (frameSyncPoint + 3 !== frameI - 2) {
            nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
            if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
              foundKeyFrame = true;
            }
          }

          // drop trailing zeroes
          do {
            frameI++;
          } while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);
          frameSyncPoint = frameI - 2;
          frameI += 3;
          break;
        case 1:
          // skip past non-sync sequences
          if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) {
            frameI += 3;
            break;
          }

          nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
          if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
            foundKeyFrame = true;
          }
          frameSyncPoint = frameI - 2;
          frameI += 3;
          break;
        default:
          // the current byte isn't a one or zero, so it cannot be part
          // of a sync sequence
          frameI += 3;
          break;
      }
    }
    frameBuffer = frameBuffer.subarray(frameSyncPoint);
    frameI -= frameSyncPoint;
    frameSyncPoint = 0;
    // parse the final nal
    if (frameBuffer && frameBuffer.byteLength > 3) {
      nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);
      if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {
        foundKeyFrame = true;
      }
    }

    return foundKeyFrame;
  };

  var probe$1 = {
    parseType: parseType$1,
    parsePat: parsePat,
    parsePmt: parsePmt,
    parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,
    parsePesType: parsePesType,
    parsePesTime: parsePesTime,
    videoPacketContainsKeyFrame: videoPacketContainsKeyFrame
  };
  var probe_1$1 = probe$1.parseType;
  var probe_2$1 = probe$1.parsePat;
  var probe_3$1 = probe$1.parsePmt;
  var probe_4 = probe$1.parsePayloadUnitStartIndicator;
  var probe_5 = probe$1.parsePesType;
  var probe_6 = probe$1.parsePesTime;
  var probe_7 = probe$1.videoPacketContainsKeyFrame;

  var probe$2 = /*#__PURE__*/Object.freeze({
    default: probe$1,
    __moduleExports: probe$1,
    parseType: probe_1$1,
    parsePat: probe_2$1,
    parsePmt: probe_3$1,
    parsePayloadUnitStartIndicator: probe_4,
    parsePesType: probe_5,
    parsePesTime: probe_6,
    videoPacketContainsKeyFrame: probe_7
  });

  /**
   * mux.js
   *
   * Copyright (c) 2016 Brightcove
   * All rights reserved.
   *
   * Utilities to detect basic properties and metadata about Aac data.
   */

  var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];

  var parseSyncSafeInteger = function parseSyncSafeInteger(data) {
    return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];
  };

  // return a percent-encoded representation of the specified byte range
  // @see http://en.wikipedia.org/wiki/Percent-encoding
  var percentEncode = function percentEncode(bytes, start, end) {
    var i,
      result = '';
    for (i = start; i < end; i++) {
      result += '%' + ('00' + bytes[i].toString(16)).slice(-2);
    }
    return result;
  };

  // return the string representation of the specified byte range,
  // interpreted as ISO-8859-1.
  var parseIso88591 = function parseIso88591(bytes, start, end) {
    return unescape(percentEncode(bytes, start, end)); // jshint ignore:line
  };

  var parseId3TagSize = function parseId3TagSize(header, byteIndex) {
    var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],
      flags = header[byteIndex + 5],
      footerPresent = (flags & 16) >> 4;

    if (footerPresent) {
      return returnSize + 20;
    }
    return returnSize + 10;
  };

  var parseAdtsSize = function parseAdtsSize(header, byteIndex) {
    var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,
      middle = header[byteIndex + 4] << 3,
      highTwo = header[byteIndex + 3] & 0x3 << 11;

    return highTwo | middle | lowThree;
  };

  var parseType$2 = function parseType(header, byteIndex) {
    if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {
      return 'timed-metadata';
    } else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {
      return 'audio';
    }
    return null;
  };

  var parseSampleRate = function parseSampleRate(packet) {
    var i = 0;

    while (i + 5 < packet.length) {
      if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {
        // If a valid header was not found,  jump one forward and attempt to
        // find a valid ADTS header starting at the next byte
        i++;
        continue;
      }
      return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];
    }

    return null;
  };

  var parseAacTimestamp = function parseAacTimestamp(packet) {
    var frameStart, frameSize, frame, frameHeader;

    // find the start of the first frame and the end of the tag
    frameStart = 10;
    if (packet[5] & 0x40) {
      // advance the frame start past the extended header
      frameStart += 4; // header size field
      frameStart += parseSyncSafeInteger(packet.subarray(10, 14));
    }

    // parse one or more ID3 frames
    // http://id3.org/id3v2.3.0#ID3v2_frame_overview
    do {
      // determine the number of bytes in this frame
      frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));
      if (frameSize < 1) {
        return null;
      }
      frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);

      if (frameHeader === 'PRIV') {
        frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);

        for (var i = 0; i < frame.byteLength; i++) {
          if (frame[i] === 0) {
            var owner = parseIso88591(frame, 0, i);
            if (owner === 'com.apple.streaming.transportStreamTimestamp') {
              var d = frame.subarray(i + 1);
              var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;
              size *= 4;
              size += d[7] & 0x03;

              return size;
            }
            break;
          }
        }
      }

      frameStart += 10; // advance past the frame header
      frameStart += frameSize; // advance past the frame body
    } while (frameStart < packet.byteLength);
    return null;
  };

  var probe$3 = {
    parseId3TagSize: parseId3TagSize,
    parseAdtsSize: parseAdtsSize,
    parseType: parseType$2,
    parseSampleRate: parseSampleRate,
    parseAacTimestamp: parseAacTimestamp
  };
  var probe_1$2 = probe$3.parseId3TagSize;
  var probe_2$2 = probe$3.parseAdtsSize;
  var probe_3$2 = probe$3.parseType;
  var probe_4$1 = probe$3.parseSampleRate;
  var probe_5$1 = probe$3.parseAacTimestamp;

  var probe$4 = /*#__PURE__*/Object.freeze({
    default: probe$3,
    __moduleExports: probe$3,
    parseId3TagSize: probe_1$2,
    parseAdtsSize: probe_2$2,
    parseType: probe_3$2,
    parseSampleRate: probe_4$1,
    parseAacTimestamp: probe_5$1
  });

  var require$$0$2 = (timestampRolloverStream$1 && timestampRolloverStream) || timestampRolloverStream$1;

  var require$$1$1 = (probe$2 && probe$1) || probe$2;

  var require$$2$1 = (probe$4 && probe$3) || probe$4;

  var handleRollover$1 = require$$0$2.handleRollover;
  var probe$5 = {};
  probe$5.ts = require$$1$1;
  probe$5.aac = require$$2$1;

  var PES_TIMESCALE = 90000,
    MP2T_PACKET_LENGTH = 188,
    // bytes
    SYNC_BYTE = 0x47;

  var isLikelyAacData = function isLikelyAacData(data) {
    if (data[0] === 'I'.charCodeAt(0) && data[1] === 'D'.charCodeAt(0) && data[2] === '3'.charCodeAt(0)) {
      return true;
    }
    return false;
  };

  /**
   * walks through segment data looking for pat and pmt packets to parse out
   * program map table information
   */
  var parsePsi_ = function parsePsi_(bytes, pmt) {
    var startIndex = 0,
      endIndex = MP2T_PACKET_LENGTH,
      packet,
      type;

    while (endIndex < bytes.byteLength) {
      // Look for a pair of start and end sync bytes in the data..
      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {
        // We found a packet
        packet = bytes.subarray(startIndex, endIndex);
        type = probe$5.ts.parseType(packet, pmt.pid);

        switch (type) {
          case 'pat':
            if (!pmt.pid) {
              pmt.pid = probe$5.ts.parsePat(packet);
            }
            break;
          case 'pmt':
            if (!pmt.table) {
              pmt.table = probe$5.ts.parsePmt(packet);
            }
            break;
          default:
            break;
        }

        // Found the pat and pmt, we can stop walking the segment
        if (pmt.pid && pmt.table) {
          return;
        }

        startIndex += MP2T_PACKET_LENGTH;
        endIndex += MP2T_PACKET_LENGTH;
        continue;
      }

      // If we get here, we have somehow become de-synchronized and we need to step
      // forward one byte at a time until we find a pair of sync bytes that denote
      // a packet
      startIndex++;
      endIndex++;
    }
  };

  /**
   * walks through the segment data from the start and end to get timing information
   * for the first and last audio pes packets
   */
  var parseAudioPes_ = function parseAudioPes_(bytes, pmt, result) {
    var startIndex = 0,
      endIndex = MP2T_PACKET_LENGTH,
      packet,
      type,
      pesType,
      pusi,
      parsed;

    var endLoop = false;

    // Start walking from start of segment to get first audio packet
    while (endIndex < bytes.byteLength) {
      // Look for a pair of start and end sync bytes in the data..
      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {
        // We found a packet
        packet = bytes.subarray(startIndex, endIndex);
        type = probe$5.ts.parseType(packet, pmt.pid);

        switch (type) {
          case 'pes':
            pesType = probe$5.ts.parsePesType(packet, pmt.table);
            pusi = probe$5.ts.parsePayloadUnitStartIndicator(packet);
            if (pesType === 'audio' && pusi) {
              parsed = probe$5.ts.parsePesTime(packet);
              if (parsed) {
                parsed.type = 'audio';
                result.audio.push(parsed);
                endLoop = true;
              }
            }
            break;
          default:
            break;
        }

        if (endLoop) {
          break;
        }

        startIndex += MP2T_PACKET_LENGTH;
        endIndex += MP2T_PACKET_LENGTH;
        continue;
      }

      // If we get here, we have somehow become de-synchronized and we need to step
      // forward one byte at a time until we find a pair of sync bytes that denote
      // a packet
      startIndex++;
      endIndex++;
    }

    // Start walking from end of segment to get last audio packet
    endIndex = bytes.byteLength;
    startIndex = endIndex - MP2T_PACKET_LENGTH;
    endLoop = false;
    while (startIndex >= 0) {
      // Look for a pair of start and end sync bytes in the data..
      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {
        // We found a packet
        packet = bytes.subarray(startIndex, endIndex);
        type = probe$5.ts.parseType(packet, pmt.pid);

        switch (type) {
          case 'pes':
            pesType = probe$5.ts.parsePesType(packet, pmt.table);
            pusi = probe$5.ts.parsePayloadUnitStartIndicator(packet);
            if (pesType === 'audio' && pusi) {
              parsed = probe$5.ts.parsePesTime(packet);
              if (parsed) {
                parsed.type = 'audio';
                result.audio.push(parsed);
                endLoop = true;
              }
            }
            break;
          default:
            break;
        }

        if (endLoop) {
          break;
        }

        startIndex -= MP2T_PACKET_LENGTH;
        endIndex -= MP2T_PACKET_LENGTH;
        continue;
      }

      // If we get here, we have somehow become de-synchronized and we need to step
      // forward one byte at a time until we find a pair of sync bytes that denote
      // a packet
      startIndex--;
      endIndex--;
    }
  };

  /**
   * walks through the segment data from the start and end to get timing information
   * for the first and last video pes packets as well as timing information for the first
   * key frame.
   */
  var parseVideoPes_ = function parseVideoPes_(bytes, pmt, result) {
    var startIndex = 0,
      endIndex = MP2T_PACKET_LENGTH,
      packet,
      type,
      pesType,
      pusi,
      parsed,
      frame,
      i,
      pes;

    var endLoop = false;

    var currentFrame = {
      data: [],
      size: 0
    };

    // Start walking from start of segment to get first video packet
    while (endIndex < bytes.byteLength) {
      // Look for a pair of start and end sync bytes in the data..
      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {
        // We found a packet
        packet = bytes.subarray(startIndex, endIndex);
        type = probe$5.ts.parseType(packet, pmt.pid);

        switch (type) {
          case 'pes':
            pesType = probe$5.ts.parsePesType(packet, pmt.table);
            pusi = probe$5.ts.parsePayloadUnitStartIndicator(packet);
            if (pesType === 'video') {
              if (pusi && !endLoop) {
                parsed = probe$5.ts.parsePesTime(packet);
                if (parsed) {
                  parsed.type = 'video';
                  result.video.push(parsed);
                  endLoop = true;
                }
              }
              if (!result.firstKeyFrame) {
                if (pusi) {
                  if (currentFrame.size !== 0) {
                    frame = new Uint8Array(currentFrame.size);
                    i = 0;
                    while (currentFrame.data.length) {
                      pes = currentFrame.data.shift();
                      frame.set(pes, i);
                      i += pes.byteLength;
                    }
                    if (probe$5.ts.videoPacketContainsKeyFrame(frame)) {
                      result.firstKeyFrame = probe$5.ts.parsePesTime(frame);
                      result.firstKeyFrame.type = 'video';
                    }
                    currentFrame.size = 0;
                  }
                }
                currentFrame.data.push(packet);
                currentFrame.size += packet.byteLength;
              }
            }
            break;
          default:
            break;
        }

        if (endLoop && result.firstKeyFrame) {
          break;
        }

        startIndex += MP2T_PACKET_LENGTH;
        endIndex += MP2T_PACKET_LENGTH;
        continue;
      }

      // If we get here, we have somehow become de-synchronized and we need to step
      // forward one byte at a time until we find a pair of sync bytes that denote
      // a packet
      startIndex++;
      endIndex++;
    }

    // Start walking from end of segment to get last video packet
    endIndex = bytes.byteLength;
    startIndex = endIndex - MP2T_PACKET_LENGTH;
    endLoop = false;
    while (startIndex >= 0) {
      // Look for a pair of start and end sync bytes in the data..
      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {
        // We found a packet
        packet = bytes.subarray(startIndex, endIndex);
        type = probe$5.ts.parseType(packet, pmt.pid);

        switch (type) {
          case 'pes':
            pesType = probe$5.ts.parsePesType(packet, pmt.table);
            pusi = probe$5.ts.parsePayloadUnitStartIndicator(packet);
            if (pesType === 'video' && pusi) {
              parsed = probe$5.ts.parsePesTime(packet);
              if (parsed) {
                parsed.type = 'video';
                result.video.push(parsed);
                endLoop = true;
              }
            }
            break;
          default:
            break;
        }

        if (endLoop) {
          break;
        }

        startIndex -= MP2T_PACKET_LENGTH;
        endIndex -= MP2T_PACKET_LENGTH;
        continue;
      }

      // If we get here, we have somehow become de-synchronized and we need to step
      // forward one byte at a time until we find a pair of sync bytes that denote
      // a packet
      startIndex--;
      endIndex--;
    }
  };

  /**
   * Adjusts the timestamp information for the segment to account for
   * rollover and convert to seconds based on pes packet timescale (90khz clock)
   */
  var adjustTimestamp_ = function adjustTimestamp_(segmentInfo, baseTimestamp) {
    if (segmentInfo.audio && segmentInfo.audio.length) {
      var audioBaseTimestamp = baseTimestamp;
      if (typeof audioBaseTimestamp === 'undefined') {
        audioBaseTimestamp = segmentInfo.audio[0].dts;
      }
      segmentInfo.audio.forEach(function (info) {
        info.dts = handleRollover$1(info.dts, audioBaseTimestamp);
        info.pts = handleRollover$1(info.pts, audioBaseTimestamp);
        // time in seconds
        info.dtsTime = info.dts / PES_TIMESCALE;
        info.ptsTime = info.pts / PES_TIMESCALE;
      });
    }

    if (segmentInfo.video && segmentInfo.video.length) {
      var videoBaseTimestamp = baseTimestamp;
      if (typeof videoBaseTimestamp === 'undefined') {
        videoBaseTimestamp = segmentInfo.video[0].dts;
      }
      segmentInfo.video.forEach(function (info) {
        info.dts = handleRollover$1(info.dts, videoBaseTimestamp);
        info.pts = handleRollover$1(info.pts, videoBaseTimestamp);
        // time in seconds
        info.dtsTime = info.dts / PES_TIMESCALE;
        info.ptsTime = info.pts / PES_TIMESCALE;
      });
      if (segmentInfo.firstKeyFrame) {
        var frame = segmentInfo.firstKeyFrame;
        frame.dts = handleRollover$1(frame.dts, videoBaseTimestamp);
        frame.pts = handleRollover$1(frame.pts, videoBaseTimestamp);
        // time in seconds
        frame.dtsTime = frame.dts / PES_TIMESCALE;
        frame.ptsTime = frame.dts / PES_TIMESCALE;
      }
    }
  };

  /**
   * inspects the aac data stream for start and end time information
   */
  var inspectAac_ = function inspectAac_(bytes) {
    var endLoop = false,
      audioCount = 0,
      sampleRate = null,
      timestamp = null,
      frameSize = 0,
      byteIndex = 0,
      packet;

    while (bytes.length - byteIndex >= 3) {
      var type = probe$5.aac.parseType(bytes, byteIndex);
      switch (type) {
        case 'timed-metadata':
          // Exit early because we don't have enough to parse
          // the ID3 tag header
          if (bytes.length - byteIndex < 10) {
            endLoop = true;
            break;
          }

          frameSize = probe$5.aac.parseId3TagSize(bytes, byteIndex);

          // Exit early if we don't have enough in the buffer
          // to emit a full packet
          if (frameSize > bytes.length) {
            endLoop = true;
            break;
          }
          if (timestamp === null) {
            packet = bytes.subarray(byteIndex, byteIndex + frameSize);
            timestamp = probe$5.aac.parseAacTimestamp(packet);
          }
          byteIndex += frameSize;
          break;
        case 'audio':
          // Exit early because we don't have enough to parse
          // the ADTS frame header
          if (bytes.length - byteIndex < 7) {
            endLoop = true;
            break;
          }

          frameSize = probe$5.aac.parseAdtsSize(bytes, byteIndex);

          // Exit early if we don't have enough in the buffer
          // to emit a full packet
          if (frameSize > bytes.length) {
            endLoop = true;
            break;
          }
          if (sampleRate === null) {
            packet = bytes.subarray(byteIndex, byteIndex + frameSize);
            sampleRate = probe$5.aac.parseSampleRate(packet);
          }
          audioCount++;
          byteIndex += frameSize;
          break;
        default:
          byteIndex++;
          break;
      }
      if (endLoop) {
        return null;
      }
    }
    if (sampleRate === null || timestamp === null) {
      return null;
    }

    var audioTimescale = PES_TIMESCALE / sampleRate;

    var result = {
      audio: [{
        type: 'audio',
        dts: timestamp,
        pts: timestamp
      }, {
        type: 'audio',
        dts: timestamp + audioCount * 1024 * audioTimescale,
        pts: timestamp + audioCount * 1024 * audioTimescale
      }]
    };

    return result;
  };

  /**
   * inspects the transport stream segment data for start and end time information
   * of the audio and video tracks (when present) as well as the first key frame's
   * start time.
   */
  var inspectTs_ = function inspectTs_(bytes) {
    var pmt = {
      pid: null,
      table: null
    };

    var result = {};

    parsePsi_(bytes, pmt);

    for (var pid in pmt.table) {
      if (pmt.table.hasOwnProperty(pid)) {
        var type = pmt.table[pid];
        switch (type) {
          case StreamTypes.H264_STREAM_TYPE:
            result.video = [];
            parseVideoPes_(bytes, pmt, result);
            if (result.video.length === 0) {
              delete result.video;
            }
            break;
          case StreamTypes.ADTS_STREAM_TYPE:
            result.audio = [];
            parseAudioPes_(bytes, pmt, result);
            if (result.audio.length === 0) {
              delete result.audio;
            }
            break;
          default:
            break;
        }
      }
    }
    return result;
  };

  /**
   * Inspects segment byte data and returns an object with start and end timing information
   *
   * @param {Uint8Array} bytes The segment byte data
   * @param {Number} baseTimestamp Relative reference timestamp used when adjusting frame
   *  timestamps for rollover. This value must be in 90khz clock.
   * @return {Object} Object containing start and end frame timing info of segment.
   */
  var inspect = function inspect(bytes, baseTimestamp) {
    var isAacData = isLikelyAacData(bytes);

    var result;

    if (isAacData) {
      result = inspectAac_(bytes);
    } else {
      result = inspectTs_(bytes);
    }

    if (!result || !result.audio && !result.video) {
      return null;
    }

    adjustTimestamp_(result, baseTimestamp);

    return result;
  };

  var tsInspector = {
    inspect: inspect
  };

  /*
   * pkcs7.pad
   * https://github.com/brightcove/pkcs7
   *
   * Copyright (c) 2014 Brightcove
   * Licensed under the apache2 license.
   */

  /**
   * Returns the subarray of a Uint8Array without PKCS#7 padding.
   * @param padded {Uint8Array} unencrypted bytes that have been padded
   * @return {Uint8Array} the unpadded bytes
   * @see http://tools.ietf.org/html/rfc5652
   */
  function unpad(padded) {
    return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);
  }

  var classCallCheck$2 = function classCallCheck$$1(instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  };

  var createClass$1 = function () {
    function defineProperties(target, props) {
      for (var i = 0; i < props.length; i++) {
        var descriptor = props[i];
        descriptor.enumerable = descriptor.enumerable || false;
        descriptor.configurable = true;
        if ("value" in descriptor) descriptor.writable = true;
        Object.defineProperty(target, descriptor.key, descriptor);
      }
    }

    return function (Constructor, protoProps, staticProps) {
      if (protoProps) defineProperties(Constructor.prototype, protoProps);
      if (staticProps) defineProperties(Constructor, staticProps);
      return Constructor;
    };
  }();

  var inherits$2 = function inherits$$1(subClass, superClass) {
    if (typeof superClass !== "function" && superClass !== null) {
      throw new TypeError("Super expression must either be null or a function, not " + (typeof superClass === "undefined" ? "undefined" : _typeof(superClass)));
    }

    subClass.prototype = Object.create(superClass && superClass.prototype, {
      constructor: {
        value: subClass,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
    if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
  };

  var possibleConstructorReturn$2 = function possibleConstructorReturn$$1(self, call) {
    if (!self) {
      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
    }

    return call && ((typeof call === "undefined" ? "undefined" : _typeof(call)) === "object" || typeof call === "function") ? call : self;
  };

  /**
   * @file aes.js
   *
   * This file contains an adaptation of the AES decryption algorithm
   * from the Standford Javascript Cryptography Library. That work is
   * covered by the following copyright and permissions notice:
   *
   * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above
   *    copyright notice, this list of conditions and the following
   *    disclaimer in the documentation and/or other materials provided
   *    with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
   * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
   * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
   * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * The views and conclusions contained in the software and documentation
   * are those of the authors and should not be interpreted as representing
   * official policies, either expressed or implied, of the authors.
   */

  /**
   * Expand the S-box tables.
   *
   * @private
   */
  var precompute = function precompute() {
    var tables = [[[], [], [], [], []], [[], [], [], [], []]];
    var encTable = tables[0];
    var decTable = tables[1];
    var sbox = encTable[4];
    var sboxInv = decTable[4];
    var i = void 0;
    var x = void 0;
    var xInv = void 0;
    var d = [];
    var th = [];
    var x2 = void 0;
    var x4 = void 0;
    var x8 = void 0;
    var s = void 0;
    var tEnc = void 0;
    var tDec = void 0;

    // Compute double and third tables
    for (i = 0; i < 256; i++) {
      th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;
    }

    for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {
      // Compute sbox
      s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;
      s = s >> 8 ^ s & 255 ^ 99;
      sbox[x] = s;
      sboxInv[s] = x;

      // Compute MixColumns
      x8 = d[x4 = d[x2 = d[x]]];
      tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;
      tEnc = d[s] * 0x101 ^ s * 0x1010100;

      for (i = 0; i < 4; i++) {
        encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;
        decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;
      }
    }

    // Compactify. Considerable speedup on Firefox.
    for (i = 0; i < 5; i++) {
      encTable[i] = encTable[i].slice(0);
      decTable[i] = decTable[i].slice(0);
    }
    return tables;
  };
  var aesTables = null;

  /**
   * Schedule out an AES key for both encryption and decryption. This
   * is a low-level class. Use a cipher mode to do bulk encryption.
   *
   * @class AES
   * @param key {Array} The key as an array of 4, 6 or 8 words.
   */

  var AES = function () {
    function AES(key) {
      classCallCheck$2(this, AES);

      /**
       * The expanded S-box and inverse S-box tables. These will be computed
       * on the client so that we don't have to send them down the wire.
       *
       * There are two tables, _tables[0] is for encryption and
       * _tables[1] is for decryption.
       *
       * The first 4 sub-tables are the expanded S-box with MixColumns. The
       * last (_tables[01][4]) is the S-box itself.
       *
       * @private
       */
      // if we have yet to precompute the S-box tables
      // do so now
      if (!aesTables) {
        aesTables = precompute();
      }
      // then make a copy of that object for use
      this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];
      var i = void 0;
      var j = void 0;
      var tmp = void 0;
      var encKey = void 0;
      var decKey = void 0;
      var sbox = this._tables[0][4];
      var decTable = this._tables[1];
      var keyLen = key.length;
      var rcon = 1;

      if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {
        throw new Error('Invalid aes key size');
      }

      encKey = key.slice(0);
      decKey = [];
      this._key = [encKey, decKey];

      // schedule encryption keys
      for (i = keyLen; i < 4 * keyLen + 28; i++) {
        tmp = encKey[i - 1];

        // apply sbox
        if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {
          tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255];

          // shift rows and add rcon
          if (i % keyLen === 0) {
            tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;
            rcon = rcon << 1 ^ (rcon >> 7) * 283;
          }
        }

        encKey[i] = encKey[i - keyLen] ^ tmp;
      }

      // schedule decryption keys
      for (j = 0; i; j++, i--) {
        tmp = encKey[j & 3 ? i : i - 4];
        if (i <= 4 || j < 4) {
          decKey[j] = tmp;
        } else {
          decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];
        }
      }
    }

    /**
     * Decrypt 16 bytes, specified as four 32-bit words.
     *
     * @param {Number} encrypted0 the first word to decrypt
     * @param {Number} encrypted1 the second word to decrypt
     * @param {Number} encrypted2 the third word to decrypt
     * @param {Number} encrypted3 the fourth word to decrypt
     * @param {Int32Array} out the array to write the decrypted words
     * into
     * @param {Number} offset the offset into the output array to start
     * writing results
     * @return {Array} The plaintext.
     */

    AES.prototype.decrypt = function decrypt(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {
      var key = this._key[1];
      // state variables a,b,c,d are loaded with pre-whitened data
      var a = encrypted0 ^ key[0];
      var b = encrypted3 ^ key[1];
      var c = encrypted2 ^ key[2];
      var d = encrypted1 ^ key[3];
      var a2 = void 0;
      var b2 = void 0;
      var c2 = void 0;

      // key.length === 2 ?
      var nInnerRounds = key.length / 4 - 2;
      var i = void 0;
      var kIndex = 4;
      var table = this._tables[1];

      // load up the tables
      var table0 = table[0];
      var table1 = table[1];
      var table2 = table[2];
      var table3 = table[3];
      var sbox = table[4];

      // Inner rounds. Cribbed from OpenSSL.
      for (i = 0; i < nInnerRounds; i++) {
        a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];
        b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];
        c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];
        d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];
        kIndex += 4;
        a = a2;
        b = b2;
        c = c2;
      }

      // Last round.
      for (i = 0; i < 4; i++) {
        out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];
        a2 = a;
        a = b;
        b = c;
        c = d;
        d = a2;
      }
    };

    return AES;
  }();

  /**
   * @file stream.js
   */
  /**
   * A lightweight readable stream implemention that handles event dispatching.
   *
   * @class Stream
   */
  var Stream$3 = function () {
    function Stream() {
      classCallCheck$2(this, Stream);

      this.listeners = {};
    }

    /**
     * Add a listener for a specified event type.
     *
     * @param {String} type the event name
     * @param {Function} listener the callback to be invoked when an event of
     * the specified type occurs
     */

    Stream.prototype.on = function on(type, listener) {
      if (!this.listeners[type]) {
        this.listeners[type] = [];
      }
      this.listeners[type].push(listener);
    };

    /**
     * Remove a listener for a specified event type.
     *
     * @param {String} type the event name
     * @param {Function} listener  a function previously registered for this
     * type of event through `on`
     * @return {Boolean} if we could turn it off or not
     */

    Stream.prototype.off = function off(type, listener) {
      if (!this.listeners[type]) {
        return false;
      }

      var index = this.listeners[type].indexOf(listener);

      this.listeners[type].splice(index, 1);
      return index > -1;
    };

    /**
     * Trigger an event of the specified type on this stream. Any additional
     * arguments to this function are passed as parameters to event listeners.
     *
     * @param {String} type the event name
     */

    Stream.prototype.trigger = function trigger(type) {
      var callbacks = this.listeners[type];

      if (!callbacks) {
        return;
      }

      // Slicing the arguments on every invocation of this method
      // can add a significant amount of overhead. Avoid the
      // intermediate object creation for the common case of a
      // single callback argument
      if (arguments.length === 2) {
        var length = callbacks.length;

        for (var i = 0; i < length; ++i) {
          callbacks[i].call(this, arguments[1]);
        }
      } else {
        var args = Array.prototype.slice.call(arguments, 1);
        var _length = callbacks.length;

        for (var _i = 0; _i < _length; ++_i) {
          callbacks[_i].apply(this, args);
        }
      }
    };

    /**
     * Destroys the stream and cleans up.
     */

    Stream.prototype.dispose = function dispose() {
      this.listeners = {};
    };
    /**
     * Forwards all `data` events on this stream to the destination stream. The
     * destination stream should provide a method `push` to receive the data
     * events as they arrive.
     *
     * @param {Stream} destination the stream that will receive all `data` events
     * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options
     */

    Stream.prototype.pipe = function pipe(destination) {
      this.on('data', function (data) {
        destination.push(data);
      });
    };

    return Stream;
  }();

  /**
   * @file async-stream.js
   */
  /**
   * A wrapper around the Stream class to use setTiemout
   * and run stream "jobs" Asynchronously
   *
   * @class AsyncStream
   * @extends Stream
   */

  var AsyncStream = function (_Stream) {
    inherits$2(AsyncStream, _Stream);

    function AsyncStream() {
      classCallCheck$2(this, AsyncStream);

      var _this = possibleConstructorReturn$2(this, _Stream.call(this, Stream$3));

      _this.jobs = [];
      _this.delay = 1;
      _this.timeout_ = null;
      return _this;
    }

    /**
     * process an async job
     *
     * @private
     */

    AsyncStream.prototype.processJob_ = function processJob_() {
      this.jobs.shift()();
      if (this.jobs.length) {
        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);
      } else {
        this.timeout_ = null;
      }
    };

    /**
     * push a job into the stream
     *
     * @param {Function} job the job to push into the stream
     */

    AsyncStream.prototype.push = function push(job) {
      this.jobs.push(job);
      if (!this.timeout_) {
        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);
      }
    };

    return AsyncStream;
  }(Stream$3);

  /**
   * @file decrypter.js
   *
   * An asynchronous implementation of AES-128 CBC decryption with
   * PKCS#7 padding.
   */

  /**
   * Convert network-order (big-endian) bytes into their little-endian
   * representation.
   */
  var ntoh = function ntoh(word) {
    return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;
  };

  /**
   * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.
   *
   * @param {Uint8Array} encrypted the encrypted bytes
   * @param {Uint32Array} key the bytes of the decryption key
   * @param {Uint32Array} initVector the initialization vector (IV) to
   * use for the first round of CBC.
   * @return {Uint8Array} the decrypted bytes
   *
   * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard
   * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29
   * @see https://tools.ietf.org/html/rfc2315
   */
  var decrypt = function decrypt(encrypted, key, initVector) {
    // word-level access to the encrypted bytes
    var encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);

    var decipher = new AES(Array.prototype.slice.call(key));

    // byte and word-level access for the decrypted output
    var decrypted = new Uint8Array(encrypted.byteLength);
    var decrypted32 = new Int32Array(decrypted.buffer);

    // temporary variables for working with the IV, encrypted, and
    // decrypted data
    var init0 = void 0;
    var init1 = void 0;
    var init2 = void 0;
    var init3 = void 0;
    var encrypted0 = void 0;
    var encrypted1 = void 0;
    var encrypted2 = void 0;
    var encrypted3 = void 0;

    // iteration variable
    var wordIx = void 0;

    // pull out the words of the IV to ensure we don't modify the
    // passed-in reference and easier access
    init0 = initVector[0];
    init1 = initVector[1];
    init2 = initVector[2];
    init3 = initVector[3];

    // decrypt four word sequences, applying cipher-block chaining (CBC)
    // to each decrypted block
    for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {
      // convert big-endian (network order) words into little-endian
      // (javascript order)
      encrypted0 = ntoh(encrypted32[wordIx]);
      encrypted1 = ntoh(encrypted32[wordIx + 1]);
      encrypted2 = ntoh(encrypted32[wordIx + 2]);
      encrypted3 = ntoh(encrypted32[wordIx + 3]);

      // decrypt the block
      decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx);

      // XOR with the IV, and restore network byte-order to obtain the
      // plaintext
      decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);
      decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);
      decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);
      decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3);

      // setup the IV for the next round
      init0 = encrypted0;
      init1 = encrypted1;
      init2 = encrypted2;
      init3 = encrypted3;
    }

    return decrypted;
  };

  /**
   * The `Decrypter` class that manages decryption of AES
   * data through `AsyncStream` objects and the `decrypt`
   * function
   *
   * @param {Uint8Array} encrypted the encrypted bytes
   * @param {Uint32Array} key the bytes of the decryption key
   * @param {Uint32Array} initVector the initialization vector (IV) to
   * @param {Function} done the function to run when done
   * @class Decrypter
   */

  var Decrypter = function () {
    function Decrypter(encrypted, key, initVector, done) {
      classCallCheck$2(this, Decrypter);

      var step = Decrypter.STEP;
      var encrypted32 = new Int32Array(encrypted.buffer);
      var decrypted = new Uint8Array(encrypted.byteLength);
      var i = 0;

      this.asyncStream_ = new AsyncStream();

      // split up the encryption job and do the individual chunks asynchronously
      this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));
      for (i = step; i < encrypted32.length; i += step) {
        initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);
        this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));
      }
      // invoke the done() callback when everything is finished
      this.asyncStream_.push(function () {
        // remove pkcs#7 padding from the decrypted bytes
        done(null, unpad(decrypted));
      });
    }

    /**
     * a getter for step the maximum number of bytes to process at one time
     *
     * @return {Number} the value of step 32000
     */

    /**
     * @private
     */
    Decrypter.prototype.decryptChunk_ = function decryptChunk_(encrypted, key, initVector, decrypted) {
      return function () {
        var bytes = decrypt(encrypted, key, initVector);

        decrypted.set(bytes, encrypted.byteOffset);
      };
    };

    createClass$1(Decrypter, null, [{
      key: 'STEP',
      get: function get$$1() {
        // 4 * 8000;
        return 32000;
      }
    }]);
    return Decrypter;
  }();

  /**
   * @videojs/http-streaming
   * @version 1.0.0
   * @copyright 2018 Brightcove, Inc
   * @license Apache-2.0
   */

  /**
   * @file resolve-url.js
   */

  var resolveUrl$1 = function resolveUrl(baseURL, relativeURL) {
    // return early if we don't need to resolve
    if (/^[a-z]+:/i.test(relativeURL)) {
      return relativeURL;
    }

    // if the base URL is relative then combine with the current location
    if (!/\/\//i.test(baseURL)) {
      baseURL = urlToolkit.buildAbsoluteURL(window_1.location.href, baseURL);
    }

    return urlToolkit.buildAbsoluteURL(baseURL, relativeURL);
  };

  /**
   * @file playlist-loader.js
   *
   * A state machine that manages the loading, caching, and updating of
   * M3U8 playlists.
   *
   */

  var mergeOptions$1 = videojs$1.mergeOptions,
    EventTarget$1 = videojs$1.EventTarget,
    log$2 = videojs$1.log;

  /**
   * Loops through all supported media groups in master and calls the provided
   * callback for each group
   *
   * @param {Object} master
   *        The parsed master manifest object
   * @param {Function} callback
   *        Callback to call for each media group
   */

  var forEachMediaGroup = function forEachMediaGroup(master, callback) {
    ['AUDIO', 'SUBTITLES'].forEach(function (mediaType) {
      for (var groupKey in master.mediaGroups[mediaType]) {
        for (var labelKey in master.mediaGroups[mediaType][groupKey]) {
          var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];

          callback(mediaProperties, mediaType, groupKey, labelKey);
        }
      }
    });
  };

  /**
   * Returns a new array of segments that is the result of merging
   * properties from an older list of segments onto an updated
   * list. No properties on the updated playlist will be overridden.
   *
   * @param {Array} original the outdated list of segments
   * @param {Array} update the updated list of segments
   * @param {Number=} offset the index of the first update
   * segment in the original segment list. For non-live playlists,
   * this should always be zero and does not need to be
   * specified. For live playlists, it should be the difference
   * between the media sequence numbers in the original and updated
   * playlists.
   * @return a list of merged segment objects
   */
  var updateSegments = function updateSegments(original, update, offset) {
    var result = update.slice();

    offset = offset || 0;
    var length = Math.min(original.length, update.length + offset);

    for (var i = offset; i < length; i++) {
      result[i - offset] = mergeOptions$1(original[i], result[i - offset]);
    }
    return result;
  };

  var resolveSegmentUris = function resolveSegmentUris(segment, baseUri) {
    if (!segment.resolvedUri) {
      segment.resolvedUri = resolveUrl$1(baseUri, segment.uri);
    }
    if (segment.key && !segment.key.resolvedUri) {
      segment.key.resolvedUri = resolveUrl$1(baseUri, segment.key.uri);
    }
    if (segment.map && !segment.map.resolvedUri) {
      segment.map.resolvedUri = resolveUrl$1(baseUri, segment.map.uri);
    }
  };

  /**
   * Returns a new master playlist that is the result of merging an
   * updated media playlist into the original version. If the
   * updated media playlist does not match any of the playlist
   * entries in the original master playlist, null is returned.
   *
   * @param {Object} master a parsed master M3U8 object
   * @param {Object} media a parsed media M3U8 object
   * @return {Object} a new object that represents the original
   * master playlist with the updated media playlist merged in, or
   * null if the merge produced no change.
   */
  var updateMaster = function updateMaster(master, media) {
    var result = mergeOptions$1(master, {});
    var playlist = result.playlists[media.uri];

    if (!playlist) {
      return null;
    }

    // consider the playlist unchanged if the number of segments is equal and the media
    // sequence number is unchanged
    if (playlist.segments && media.segments && playlist.segments.length === media.segments.length && playlist.mediaSequence === media.mediaSequence) {
      return null;
    }

    var mergedPlaylist = mergeOptions$1(playlist, media);

    // if the update could overlap existing segment information, merge the two segment lists
    if (playlist.segments) {
      mergedPlaylist.segments = updateSegments(playlist.segments, media.segments, media.mediaSequence - playlist.mediaSequence);
    }

    // resolve any segment URIs to prevent us from having to do it later
    mergedPlaylist.segments.forEach(function (segment) {
      resolveSegmentUris(segment, mergedPlaylist.resolvedUri);
    });

    // TODO Right now in the playlists array there are two references to each playlist, one
    // that is referenced by index, and one by URI. The index reference may no longer be
    // necessary.
    for (var i = 0; i < result.playlists.length; i++) {
      if (result.playlists[i].uri === media.uri) {
        result.playlists[i] = mergedPlaylist;
      }
    }
    result.playlists[media.uri] = mergedPlaylist;

    return result;
  };

  var setupMediaPlaylists = function setupMediaPlaylists(master) {
    // setup by-URI lookups and resolve media playlist URIs
    var i = master.playlists.length;

    while (i--) {
      var playlist = master.playlists[i];

      master.playlists[playlist.uri] = playlist;
      playlist.resolvedUri = resolveUrl$1(master.uri, playlist.uri);
      playlist.id = i;

      if (!playlist.attributes) {
        // Although the spec states an #EXT-X-STREAM-INF tag MUST have a
        // BANDWIDTH attribute, we can playOld the stream without it. This means a poorly
        // formatted master playlist may not have an attribute list. An attributes
        // property is added here to prevent undefined references when we encounter
        // this scenario.
        playlist.attributes = {};

        log$2.warn('Invalid playlist STREAM-INF detected. Missing BANDWIDTH attribute.');
      }
    }
  };

  var resolveMediaGroupUris = function resolveMediaGroupUris(master) {
    forEachMediaGroup(master, function (properties) {
      if (properties.uri) {
        properties.resolvedUri = resolveUrl$1(master.uri, properties.uri);
      }
    });
  };

  /**
   * Calculates the time to wait before refreshing a live playlist
   *
   * @param {Object} media
   *        The current media
   * @param {Boolean} update
   *        True if there were any updates from the last refresh, false otherwise
   * @return {Number}
   *         The time in ms to wait before refreshing the live playlist
   */
  var refreshDelay = function refreshDelay(media, update) {
    var lastSegment = media.segments[media.segments.length - 1];
    var delay = void 0;

    if (update && lastSegment && lastSegment.duration) {
      delay = lastSegment.duration * 1000;
    } else {
      // if the playlist is unchanged since the last reload or last segment duration
      // cannot be determined, try again after half the target duration
      delay = (media.targetDuration || 10) * 500;
    }
    return delay;
  };

  /**
   * Load a playlist from a remote location
   *
   * @class PlaylistLoader
   * @extends Stream
   * @param {String} srcUrl the url to start with
   * @param {Boolean} withCredentials the withCredentials xhr option
   * @constructor
   */

  var PlaylistLoader = function (_EventTarget) {
    inherits(PlaylistLoader, _EventTarget);

    function PlaylistLoader(srcUrl, hls, withCredentials) {
      classCallCheck(this, PlaylistLoader);

      var _this2 = possibleConstructorReturn(this, _EventTarget.call(this));

      _this2.srcUrl = srcUrl;
      _this2.hls_ = hls;
      _this2.withCredentials = withCredentials;

      if (!_this2.srcUrl) {
        throw new Error('A non-empty playlist URL is required');
      }

      // initialize the loader state
      _this2.state = 'HAVE_NOTHING';

      // live playlist staleness timeout
      _this2.on('mediaupdatetimeout', function () {
        if (_this2.state !== 'HAVE_METADATA') {
          // only refresh the media playlist if no other activity is going on
          return;
        }

        _this2.state = 'HAVE_CURRENT_METADATA';

        _this2.request = _this2.hls_.xhr({
          uri: resolveUrl$1(_this2.master.uri, _this2.media().uri),
          withCredentials: _this2.withCredentials
        }, function (error, req) {
          // disposed
          if (!_this2.request) {
            return;
          }

          if (error) {
            return _this2.playlistRequestError(_this2.request, _this2.media().uri, 'HAVE_METADATA');
          }

          _this2.haveMetadata(_this2.request, _this2.media().uri);
        });
      });
      return _this2;
    }

    PlaylistLoader.prototype.playlistRequestError = function playlistRequestError(xhr, url, startingState) {
      // any in-flight request is now finished
      this.request = null;

      if (startingState) {
        this.state = startingState;
      }

      this.error = {
        playlist: this.master.playlists[url],
        status: xhr.status,
        message: 'HLS playlist request error at URL: ' + url,
        responseText: xhr.responseText,
        code: xhr.status >= 500 ? 4 : 2
      };

      this.trigger('error');
    };

    // update the playlist loader's state in response to a new or
    // updated playlist.


    PlaylistLoader.prototype.haveMetadata = function haveMetadata(xhr, url) {
      var _this3 = this;

      // any in-flight request is now finished
      this.request = null;
      this.state = 'HAVE_METADATA';

      var parser = new Parser();

      parser.push(xhr.responseText);
      parser.end();
      parser.manifest.uri = url;
      // m3u8-parser does not attach an attributes property to media playlists so make
      // sure that the property is attached to avoid undefined reference errors
      parser.manifest.attributes = parser.manifest.attributes || {};

      // merge this playlist into the master
      var update = updateMaster(this.master, parser.manifest);

      this.targetDuration = parser.manifest.targetDuration;

      if (update) {
        this.master = update;
        this.media_ = this.master.playlists[parser.manifest.uri];
      } else {
        this.trigger('playlistunchanged');
      }

      // refresh live playlists after a target duration passes
      if (!this.media().endList) {
        window_1.clearTimeout(this.mediaUpdateTimeout);
        this.mediaUpdateTimeout = window_1.setTimeout(function () {
          _this3.trigger('mediaupdatetimeout');
        }, refreshDelay(this.media(), !!update));
      }

      this.trigger('loadedplaylist');
    };

    /**
     * Abort any outstanding work and clean up.
     */


    PlaylistLoader.prototype.dispose = function dispose() {
      this.stopRequest();
      window_1.clearTimeout(this.mediaUpdateTimeout);
    };

    PlaylistLoader.prototype.stopRequest = function stopRequest() {
      if (this.request) {
        var oldRequest = this.request;

        this.request = null;
        oldRequest.onreadystatechange = null;
        oldRequest.abort();
      }
    };

    /**
     * When called without any arguments, returns the currently
     * active media playlist. When called with a single argument,
     * triggers the playlist loader to asynchronously switch to the
     * specified media playlist. Calling this method while the
     * loader is in the HAVE_NOTHING causes an error to be emitted
     * but otherwise has no effect.
     *
     * @param {Object=} playlist the parsed media playlist
     * object to switch to
     * @return {Playlist} the current loaded media
     */


    PlaylistLoader.prototype.media = function media(playlist) {
      var _this4 = this;

      // getter
      if (!playlist) {
        return this.media_;
      }

      // setter
      if (this.state === 'HAVE_NOTHING') {
        throw new Error('Cannot switch media playlist from ' + this.state);
      }

      var startingState = this.state;

      // find the playlist object if the target playlist has been
      // specified by URI
      if (typeof playlist === 'string') {
        if (!this.master.playlists[playlist]) {
          throw new Error('Unknown playlist URI: ' + playlist);
        }
        playlist = this.master.playlists[playlist];
      }

      var mediaChange = !this.media_ || playlist.uri !== this.media_.uri;

      // switch to fully loaded playlists immediately
      if (this.master.playlists[playlist.uri].endList) {
        // abort outstanding playlist requests
        if (this.request) {
          this.request.onreadystatechange = null;
          this.request.abort();
          this.request = null;
        }
        this.state = 'HAVE_METADATA';
        this.media_ = playlist;

        // trigger media change if the active media has been updated
        if (mediaChange) {
          this.trigger('mediachanging');
          this.trigger('mediachange');
        }
        return;
      }

      // switching to the active playlist is a no-op
      if (!mediaChange) {
        return;
      }

      this.state = 'SWITCHING_MEDIA';

      // there is already an outstanding playlist request
      if (this.request) {
        if (resolveUrl$1(this.master.uri, playlist.uri) === this.request.url) {
          // requesting to switch to the same playlist multiple times
          // has no effect after the first
          return;
        }
        this.request.onreadystatechange = null;
        this.request.abort();
        this.request = null;
      }

      // request the new playlist
      if (this.media_) {
        this.trigger('mediachanging');
      }

      this.request = this.hls_.xhr({
        uri: resolveUrl$1(this.master.uri, playlist.uri),
        withCredentials: this.withCredentials
      }, function (error, req) {
        // disposed
        if (!_this4.request) {
          return;
        }

        if (error) {
          return _this4.playlistRequestError(_this4.request, playlist.uri, startingState);
        }

        _this4.haveMetadata(req, playlist.uri);

        // fire loadedmetadata the first time a media playlist is loaded
        if (startingState === 'HAVE_MASTER') {
          _this4.trigger('loadedmetadata');
        } else {
          _this4.trigger('mediachange');
        }
      });
    };

    /**
     * pause loading of the playlist
     */


    PlaylistLoader.prototype.pause = function pause() {
      this.stopRequest();
      window_1.clearTimeout(this.mediaUpdateTimeout);
      if (this.state === 'HAVE_NOTHING') {
        // If we pause the loader before any data has been retrieved, its as if we never
        // started, so reset to an unstarted state.
        this.started = false;
      }
      // Need to restore state now that no activity is happening
      if (this.state === 'SWITCHING_MEDIA') {
        // if the loader was in the process of switching media, it should either return to
        // HAVE_MASTER or HAVE_METADATA depending on if the loader has loaded a media
        // playlist yet. This is determined by the existence of loader.media_
        if (this.media_) {
          this.state = 'HAVE_METADATA';
        } else {
          this.state = 'HAVE_MASTER';
        }
      } else if (this.state === 'HAVE_CURRENT_METADATA') {
        this.state = 'HAVE_METADATA';
      }
    };

    /**
     * start loading of the playlist
     */


    PlaylistLoader.prototype.load = function load(isFinalRendition) {
      var _this5 = this;

      window_1.clearTimeout(this.mediaUpdateTimeout);

      var media = this.media();

      if (isFinalRendition) {
        var delay = media ? media.targetDuration / 2 * 1000 : 5 * 1000;

        this.mediaUpdateTimeout = window_1.setTimeout(function () {
          return _this5.load();
        }, delay);
        return;
      }

      if (!this.started) {
        this.start();
        return;
      }

      if (media && !media.endList) {
        this.trigger('mediaupdatetimeout');
      } else {
        this.trigger('loadedplaylist');
      }
    };

    /**
     * start loading of the playlist
     */


    PlaylistLoader.prototype.start = function start() {
      var _this6 = this;

      this.started = true;

      // request the specified URL
      this.request = this.hls_.xhr({
        uri: this.srcUrl,
        withCredentials: this.withCredentials
      }, function (error, req) {
        // disposed
        if (!_this6.request) {
          return;
        }

        // clear the loader's request reference
        _this6.request = null;

        if (error) {
          _this6.error = {
            status: req.status,
            message: 'HLS playlist request error at URL: ' + _this6.srcUrl,
            responseText: req.responseText,
            // MEDIA_ERR_NETWORK
            code: 2
          };
          if (_this6.state === 'HAVE_NOTHING') {
            _this6.started = false;
          }
          return _this6.trigger('error');
        }

        var parser = new Parser();

        parser.push(req.responseText);
        parser.end();

        _this6.state = 'HAVE_MASTER';

        parser.manifest.uri = _this6.srcUrl;

        // loaded a master playlist
        if (parser.manifest.playlists) {
          _this6.master = parser.manifest;

          setupMediaPlaylists(_this6.master);
          resolveMediaGroupUris(_this6.master);

          _this6.trigger('loadedplaylist');
          if (!_this6.request) {
            // no media playlist was specifically selected so start
            // from the first listed one
            _this6.media(parser.manifest.playlists[0]);
          }
          return;
        }

        // loaded a media playlist
        // infer a master playlist if none was previously requested
        _this6.master = {
          mediaGroups: {
            'AUDIO': {},
            'VIDEO': {},
            'CLOSED-CAPTIONS': {},
            'SUBTITLES': {}
          },
          uri: window_1.location.href,
          playlists: [{
            uri: _this6.srcUrl,
            id: 0
          }]
        };
        _this6.master.playlists[_this6.srcUrl] = _this6.master.playlists[0];
        _this6.master.playlists[0].resolvedUri = _this6.srcUrl;
        // m3u8-parser does not attach an attributes property to media playlists so make
        // sure that the property is attached to avoid undefined reference errors
        _this6.master.playlists[0].attributes = _this6.master.playlists[0].attributes || {};
        _this6.haveMetadata(req, _this6.srcUrl);
        return _this6.trigger('loadedmetadata');
      });
    };

    return PlaylistLoader;
  }(EventTarget$1);

  /**
   * @file playlist.js
   *
   * Playlist related utilities.
   */

  var createTimeRange = videojs$1.createTimeRange;

  /**
   * walk backward until we find a duration we can use
   * or return a failure
   *
   * @param {Playlist} playlist the playlist to walk through
   * @param {Number} endSequence the mediaSequence to stop walking on
   */

  var backwardDuration = function backwardDuration(playlist, endSequence) {
    var result = 0;
    var i = endSequence - playlist.mediaSequence;
    // if a start time is available for segment immediately following
    // the interval, use it
    var segment = playlist.segments[i];

    // Walk backward until we find the latest segment with timeline
    // information that is earlier than endSequence
    if (segment) {
      if (typeof segment.start !== 'undefined') {
        return {result: segment.start, precise: true};
      }
      if (typeof segment.end !== 'undefined') {
        return {
          result: segment.end - segment.duration,
          precise: true
        };
      }
    }
    while (i--) {
      segment = playlist.segments[i];
      if (typeof segment.end !== 'undefined') {
        return {result: result + segment.end, precise: true};
      }

      result += segment.duration;

      if (typeof segment.start !== 'undefined') {
        return {result: result + segment.start, precise: true};
      }
    }
    return {result: result, precise: false};
  };

  /**
   * walk forward until we find a duration we can use
   * or return a failure
   *
   * @param {Playlist} playlist the playlist to walk through
   * @param {Number} endSequence the mediaSequence to stop walking on
   */
  var forwardDuration = function forwardDuration(playlist, endSequence) {
    var result = 0;
    var segment = void 0;
    var i = endSequence - playlist.mediaSequence;
    // Walk forward until we find the earliest segment with timeline
    // information

    for (; i < playlist.segments.length; i++) {
      segment = playlist.segments[i];
      if (typeof segment.start !== 'undefined') {
        return {
          result: segment.start - result,
          precise: true
        };
      }

      result += segment.duration;

      if (typeof segment.end !== 'undefined') {
        return {
          result: segment.end - result,
          precise: true
        };
      }
    }
    // indicate we didn't find a useful duration estimate
    return {result: -1, precise: false};
  };

  /**
   * Calculate the media duration from the segments associated with a
   * playlist. The duration of a subinterval of the available segments
   * may be calculated by specifying an end index.
   *
   * @param {Object} playlist a media playlist object
   * @param {Number=} endSequence an exclusive upper boundary
   * for the playlist.  Defaults to playlist length.
   * @param {Number} expired the amount of time that has dropped
   * off the front of the playlist in a live scenario
   * @return {Number} the duration between the first available segment
   * and end index.
   */
  var intervalDuration = function intervalDuration(playlist, endSequence, expired) {
    var backward = void 0;
    var forward = void 0;

    if (typeof endSequence === 'undefined') {
      endSequence = playlist.mediaSequence + playlist.segments.length;
    }

    if (endSequence < playlist.mediaSequence) {
      return 0;
    }

    // do a backward walk to estimate the duration
    backward = backwardDuration(playlist, endSequence);
    if (backward.precise) {
      // if we were able to base our duration estimate on timing
      // information provided directly from the Media Source, return
      // it
      return backward.result;
    }

    // walk forward to see if a precise duration estimate can be made
    // that way
    forward = forwardDuration(playlist, endSequence);
    if (forward.precise) {
      // we found a segment that has been buffered and so it's
      // position is known precisely
      return forward.result;
    }

    // return the less-precise, playlist-based duration estimate
    return backward.result + expired;
  };

  /**
   * Calculates the duration of a playlist. If a start and end index
   * are specified, the duration will be for the subset of the media
   * timeline between those two indices. The total duration for live
   * playlists is always Infinity.
   *
   * @param {Object} playlist a media playlist object
   * @param {Number=} endSequence an exclusive upper
   * boundary for the playlist. Defaults to the playlist media
   * sequence number plus its length.
   * @param {Number=} expired the amount of time that has
   * dropped off the front of the playlist in a live scenario
   * @return {Number} the duration between the start index and end
   * index.
   */
  var duration = function duration(playlist, endSequence, expired) {
    if (!playlist) {
      return 0;
    }

    if (typeof expired !== 'number') {
      expired = 0;
    }

    // if a slice of the total duration is not requested, use
    // playlist-level duration indicators when they're present
    if (typeof endSequence === 'undefined') {
      // if present, use the duration specified in the playlist
      if (playlist.totalDuration) {
        return playlist.totalDuration;
      }

      // duration should be Infinity for live playlists
      if (!playlist.endList) {
        return window_1.Infinity;
      }
    }

    // calculate the total duration based on the segment durations
    return intervalDuration(playlist, endSequence, expired);
  };

  /**
   * Calculate the time between two indexes in the current playlist
   * neight the start- nor the end-index need to be within the current
   * playlist in which case, the targetDuration of the playlist is used
   * to approximate the durations of the segments
   *
   * @param {Object} playlist a media playlist object
   * @param {Number} startIndex
   * @param {Number} endIndex
   * @return {Number} the number of seconds between startIndex and endIndex
   */
  var sumDurations = function sumDurations(playlist, startIndex, endIndex) {
    var durations = 0;

    if (startIndex > endIndex) {
      var _ref = [endIndex, startIndex];
      startIndex = _ref[0];
      endIndex = _ref[1];
    }

    if (startIndex < 0) {
      for (var i = startIndex; i < Math.min(0, endIndex); i++) {
        durations += playlist.targetDuration;
      }
      startIndex = 0;
    }

    for (var _i2 = startIndex; _i2 < endIndex; _i2++) {
      durations += playlist.segments[_i2].duration;
    }

    return durations;
  };

  /**
   * Determines the media index of the segment corresponding to the safe edge of the live
   * window which is the duration of the last segment plus 2 target durations from the end
   * of the playlist.
   *
   * @param {Object} playlist
   *        a media playlist object
   * @return {Number}
   *         The media index of the segment at the safe live point. 0 if there is no "safe"
   *         point.
   * @function safeLiveIndex
   */
  var safeLiveIndex = function safeLiveIndex(playlist) {
    if (!playlist.segments.length) {
      return 0;
    }

    var i = playlist.segments.length - 1;
    var distanceFromEnd = playlist.segments[i].duration || playlist.targetDuration;
    var safeDistance = distanceFromEnd + playlist.targetDuration * 2;

    while (i--) {
      distanceFromEnd += playlist.segments[i].duration;

      if (distanceFromEnd >= safeDistance) {
        break;
      }
    }

    return Math.max(0, i);
  };

  /**
   * Calculates the playlist end time
   *
   * @param {Object} playlist a media playlist object
   * @param {Number=} expired the amount of time that has
   *                  dropped off the front of the playlist in a live scenario
   * @param {Boolean|false} useSafeLiveEnd a boolean value indicating whether or not the
   *                        playlist end calculation should consider the safe live end
   *                        (truncate the playlist end by three segments). This is normally
   *                        used for calculating the end of the playlist's seekable range.
   * @returns {Number} the end time of playlist
   * @function playlistEnd
   */
  var playlistEnd = function playlistEnd(playlist, expired, useSafeLiveEnd) {
    if (!playlist || !playlist.segments) {
      return null;
    }
    if (playlist.endList) {
      return duration(playlist);
    }

    if (expired === null) {
      return null;
    }

    expired = expired || 0;

    var endSequence = useSafeLiveEnd ? safeLiveIndex(playlist) : playlist.segments.length;

    return intervalDuration(playlist, playlist.mediaSequence + endSequence, expired);
  };

  /**
   * Calculates the interval of time that is currently seekable in a
   * playlist. The returned time ranges are relative to the earliest
   * moment in the specified playlist that is still available. A full
   * seekable implementation for live streams would need to offset
   * these values by the duration of content that has expired from the
   * stream.
   *
   * @param {Object} playlist a media playlist object
   * dropped off the front of the playlist in a live scenario
   * @param {Number=} expired the amount of time that has
   * dropped off the front of the playlist in a live scenario
   * @return {TimeRanges} the periods of time that are valid targets
   * for seeking
   */
  var seekable = function seekable(playlist, expired) {
    var useSafeLiveEnd = true;
    var seekableStart = expired || 0;
    var seekableEnd = playlistEnd(playlist, expired, useSafeLiveEnd);

    if (seekableEnd === null) {
      return createTimeRange();
    }
    return createTimeRange(seekableStart, seekableEnd);
  };

  var isWholeNumber = function isWholeNumber(num) {
    return num - Math.floor(num) === 0;
  };

  var roundSignificantDigit = function roundSignificantDigit(increment, num) {
    // If we have a whole number, just add 1 to it
    if (isWholeNumber(num)) {
      return num + increment * 0.1;
    }

    var numDecimalDigits = num.toString().split('.')[1].length;

    for (var i = 1; i <= numDecimalDigits; i++) {
      var scale = Math.pow(10, i);
      var temp = num * scale;

      if (isWholeNumber(temp) || i === numDecimalDigits) {
        return (temp + increment) / scale;
      }
    }
  };

  var ceilLeastSignificantDigit = roundSignificantDigit.bind(null, 1);
  var floorLeastSignificantDigit = roundSignificantDigit.bind(null, -1);

  /**
   * Determine the index and estimated starting time of the segment that
   * contains a specified playback position in a media playlist.
   *
   * @param {Object} playlist the media playlist to query
   * @param {Number} currentTime The number of seconds since the earliest
   * possible position to determine the containing segment for
   * @param {Number} startIndex
   * @param {Number} startTime
   * @return {Object}
   */
  var getMediaInfoForTime = function getMediaInfoForTime(playlist, currentTime, startIndex, startTime) {
    var i = void 0;
    var segment = void 0;
    var numSegments = playlist.segments.length;

    var time = currentTime - startTime;

    if (time < 0) {
      // Walk backward from startIndex in the playlist, adding durations
      // until we find a segment that contains `time` and return it
      if (startIndex > 0) {
        for (i = startIndex - 1; i >= 0; i--) {
          segment = playlist.segments[i];
          time += floorLeastSignificantDigit(segment.duration);
          if (time > 0) {
            return {
              mediaIndex: i,
              startTime: startTime - sumDurations(playlist, startIndex, i)
            };
          }
        }
      }
      // We were unable to find a good segment within the playlist
      // so select the first segment
      return {
        mediaIndex: 0,
        startTime: currentTime
      };
    }

    // When startIndex is negative, we first walk forward to first segment
    // adding target durations. If we "run out of time" before getting to
    // the first segment, return the first segment
    if (startIndex < 0) {
      for (i = startIndex; i < 0; i++) {
        time -= playlist.targetDuration;
        if (time < 0) {
          return {
            mediaIndex: 0,
            startTime: currentTime
          };
        }
      }
      startIndex = 0;
    }

    // Walk forward from startIndex in the playlist, subtracting durations
    // until we find a segment that contains `time` and return it
    for (i = startIndex; i < numSegments; i++) {
      segment = playlist.segments[i];
      time -= ceilLeastSignificantDigit(segment.duration);
      if (time < 0) {
        return {
          mediaIndex: i,
          startTime: startTime + sumDurations(playlist, startIndex, i)
        };
      }
    }

    // We are out of possible candidates so load the last one...
    return {
      mediaIndex: numSegments - 1,
      startTime: currentTime
    };
  };

  /**
   * Check whether the playlist is blacklisted or not.
   *
   * @param {Object} playlist the media playlist object
   * @return {boolean} whether the playlist is blacklisted or not
   * @function isBlacklisted
   */
  var isBlacklisted = function isBlacklisted(playlist) {
    return playlist.excludeUntil && playlist.excludeUntil > Date.now();
  };

  /**
   * Check whether the playlist is compatible with current playback configuration or has
   * been blacklisted permanently for being incompatible.
   *
   * @param {Object} playlist the media playlist object
   * @return {boolean} whether the playlist is incompatible or not
   * @function isIncompatible
   */
  var isIncompatible = function isIncompatible(playlist) {
    return playlist.excludeUntil && playlist.excludeUntil === Infinity;
  };

  /**
   * Check whether the playlist is enabled or not.
   *
   * @param {Object} playlist the media playlist object
   * @return {boolean} whether the playlist is enabled or not
   * @function isEnabled
   */
  var isEnabled = function isEnabled(playlist) {
    var blacklisted = isBlacklisted(playlist);

    return !playlist.disabled && !blacklisted;
  };

  /**
   * Check whether the playlist has been manually disabled through the representations api.
   *
   * @param {Object} playlist the media playlist object
   * @return {boolean} whether the playlist is disabled manually or not
   * @function isDisabled
   */
  var isDisabled = function isDisabled(playlist) {
    return playlist.disabled;
  };

  /**
   * Returns whether the current playlist is an AES encrypted HLS stream
   *
   * @return {Boolean} true if it's an AES encrypted HLS stream
   */
  var isAes = function isAes(media) {
    for (var i = 0; i < media.segments.length; i++) {
      if (media.segments[i].key) {
        return true;
      }
    }
    return false;
  };

  /**
   * Returns whether the current playlist contains fMP4
   *
   * @return {Boolean} true if the playlist contains fMP4
   */
  var isFmp4 = function isFmp4(media) {
    for (var i = 0; i < media.segments.length; i++) {
      if (media.segments[i].map) {
        return true;
      }
    }
    return false;
  };

  /**
   * Checks if the playlist has a value for the specified attribute
   *
   * @param {String} attr
   *        Attribute to check for
   * @param {Object} playlist
   *        The media playlist object
   * @return {Boolean}
   *         Whether the playlist contains a value for the attribute or not
   * @function hasAttribute
   */
  var hasAttribute = function hasAttribute(attr, playlist) {
    return playlist.attributes && playlist.attributes[attr];
  };

  /**
   * Estimates the time required to complete a segment download from the specified playlist
   *
   * @param {Number} segmentDuration
   *        Duration of requested segment
   * @param {Number} bandwidth
   *        Current measured bandwidth of the player
   * @param {Object} playlist
   *        The media playlist object
   * @param {Number=} bytesReceived
   *        Number of bytes already received for the request. Defaults to 0
   * @return {Number|NaN}
   *         The estimated time to request the segment. NaN if bandwidth information for
   *         the given playlist is unavailable
   * @function estimateSegmentRequestTime
   */
  var estimateSegmentRequestTime = function estimateSegmentRequestTime(segmentDuration, bandwidth, playlist) {
    var bytesReceived = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 0;

    if (!hasAttribute('BANDWIDTH', playlist)) {
      return NaN;
    }

    var size = segmentDuration * playlist.attributes.BANDWIDTH;

    return (size - bytesReceived * 8) / bandwidth;
  };

  /*
   * Returns whether the current playlist is the lowest rendition
   *
   * @return {Boolean} true if on lowest rendition
   */
  var isLowestEnabledRendition = function isLowestEnabledRendition(master, media) {
    if (master.playlists.length === 1) {
      return true;
    }

    var currentBandwidth = media.attributes.BANDWIDTH || Number.MAX_VALUE;

    return master.playlists.filter(function (playlist) {
      if (!isEnabled(playlist)) {
        return false;
      }

      return (playlist.attributes.BANDWIDTH || 0) < currentBandwidth;
    }).length === 0;
  };

  // exports
  var Playlist = {
    duration: duration,
    seekable: seekable,
    safeLiveIndex: safeLiveIndex,
    getMediaInfoForTime: getMediaInfoForTime,
    isEnabled: isEnabled,
    isDisabled: isDisabled,
    isBlacklisted: isBlacklisted,
    isIncompatible: isIncompatible,
    playlistEnd: playlistEnd,
    isAes: isAes,
    isFmp4: isFmp4,
    hasAttribute: hasAttribute,
    estimateSegmentRequestTime: estimateSegmentRequestTime,
    isLowestEnabledRendition: isLowestEnabledRendition
  };

  /**
   * @file xhr.js
   */

  var videojsXHR = videojs$1.xhr,
    mergeOptions$1$1 = videojs$1.mergeOptions;


  var xhrFactory = function xhrFactory() {
    var xhr = function XhrFunction(options, callback) {
      // Add a default timeout for all hls requests
      options = mergeOptions$1$1({
        timeout: 45e3
      }, options);

      // Allow an optional user-specified function to modify the option
      // object before we construct the xhr request
      var beforeRequest = XhrFunction.beforeRequest || videojs$1.Hls.xhr.beforeRequest;

      if (beforeRequest && typeof beforeRequest === 'function') {
        var newOptions = beforeRequest(options);

        if (newOptions) {
          options = newOptions;
        }
      }

      var request = videojsXHR(options, function (error, response) {
        var reqResponse = request.response;

        if (!error && reqResponse) {
          request.responseTime = Date.now();
          request.roundTripTime = request.responseTime - request.requestTime;
          request.bytesReceived = reqResponse.byteLength || reqResponse.length;
          if (!request.bandwidth) {
            request.bandwidth = Math.floor(request.bytesReceived / request.roundTripTime * 8 * 1000);
          }
        }

        if (response.headers) {
          request.responseHeaders = response.headers;
        }

        // videojs.xhr now uses a specific code on the error
        // object to signal that a request has timed out instead
        // of setting a boolean on the request object
        if (error && error.code === 'ETIMEDOUT') {
          request.timedout = true;
        }

        // videojs.xhr no longer considers status codes outside of 200 and 0
        // (for file uris) to be errors, but the old XHR did, so emulate that
        // behavior. Status 206 may be used in response to byterange requests.
        if (!error && !request.aborted && response.statusCode !== 200 && response.statusCode !== 206 && response.statusCode !== 0) {
          error = new Error('XHR Failed with a response of: ' + (request && (reqResponse || request.responseText)));
        }

        callback(error, request);
      });
      var originalAbort = request.abort;

      request.abort = function () {
        request.aborted = true;
        return originalAbort.apply(request, arguments);
      };
      request.uri = options.uri;
      request.requestTime = Date.now();
      return request;
    };

    return xhr;
  };

  /**
   * @file bin-utils.js
   */

  /**
   * convert a TimeRange to text
   *
   * @param {TimeRange} range the timerange to use for conversion
   * @param {Number} i the iterator on the range to convert
   */
  var textRange = function textRange(range, i) {
    return range.start(i) + '-' + range.end(i);
  };

  /**
   * format a number as hex string
   *
   * @param {Number} e The number
   * @param {Number} i the iterator
   */
  var formatHexString = function formatHexString(e, i) {
    var value = e.toString(16);

    return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : '');
  };
  var formatAsciiString = function formatAsciiString(e) {
    if (e >= 0x20 && e < 0x7e) {
      return String.fromCharCode(e);
    }
    return '.';
  };

  /**
   * Creates an object for sending to a web worker modifying properties that are TypedArrays
   * into a new object with seperated properties for the buffer, byteOffset, and byteLength.
   *
   * @param {Object} message
   *        Object of properties and values to send to the web worker
   * @return {Object}
   *         Modified message with TypedArray values expanded
   * @function createTransferableMessage
   */
  var createTransferableMessage = function createTransferableMessage(message) {
    var transferable = {};

    Object.keys(message).forEach(function (key) {
      var value = message[key];

      if (ArrayBuffer.isView(value)) {
        transferable[key] = {
          bytes: value.buffer,
          byteOffset: value.byteOffset,
          byteLength: value.byteLength
        };
      } else {
        transferable[key] = value;
      }
    });

    return transferable;
  };

  /**
   * Returns a unique string identifier for a media initialization
   * segment.
   */
  var initSegmentId = function initSegmentId(initSegment) {
    var byterange = initSegment.byterange || {
      length: Infinity,
      offset: 0
    };

    return [byterange.length, byterange.offset, initSegment.resolvedUri].join(',');
  };

  /**
   * utils to help dump binary data to the console
   */
  var hexDump = function hexDump(data) {
    var bytes = Array.prototype.slice.call(data);
    var step = 16;
    var result = '';
    var hex = void 0;
    var ascii = void 0;

    for (var j = 0; j < bytes.length / step; j++) {
      hex = bytes.slice(j * step, j * step + step).map(formatHexString).join('');
      ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join('');
      result += hex + ' ' + ascii + '\n';
    }

    return result;
  };

  var tagDump = function tagDump(_ref2) {
    var bytes = _ref2.bytes;
    return hexDump(bytes);
  };

  var textRanges = function textRanges(ranges) {
    var result = '';
    var i = void 0;

    for (i = 0; i < ranges.length; i++) {
      result += textRange(ranges, i) + ' ';
    }
    return result;
  };

  var utils = /*#__PURE__*/Object.freeze({
    createTransferableMessage: createTransferableMessage,
    initSegmentId: initSegmentId,
    hexDump: hexDump,
    tagDump: tagDump,
    textRanges: textRanges
  });

  /**
   * ranges
   *
   * Utilities for working with TimeRanges.
   *
   */

    // Fudge factor to account for TimeRanges rounding
  var TIME_FUDGE_FACTOR = 1 / 30;
  // Comparisons between time values such as current time and the end of the buffered range
  // can be misleading because of precision differences or when the current media has poorly
  // aligned audio and video, which can cause values to be slightly off from what you would
  // expect. This value is what we consider to be safe to use in such comparisons to account
  // for these scenarios.
  var SAFE_TIME_DELTA = TIME_FUDGE_FACTOR * 3;
  var filterRanges = function filterRanges(timeRanges, predicate) {
    var results = [];
    var i = void 0;

    if (timeRanges && timeRanges.length) {
      // Search for ranges that match the predicate
      for (i = 0; i < timeRanges.length; i++) {
        if (predicate(timeRanges.start(i), timeRanges.end(i))) {
          results.push([timeRanges.start(i), timeRanges.end(i)]);
        }
      }
    }

    return videojs$1.createTimeRanges(results);
  };

  /**
   * Attempts to find the buffered TimeRange that contains the specified
   * time.
   * @param {TimeRanges} buffered - the TimeRanges object to query
   * @param {number} time  - the time to filter on.
   * @returns {TimeRanges} a new TimeRanges object
   */
  var findRange = function findRange(buffered, time) {
    return filterRanges(buffered, function (start, end) {
      return start - TIME_FUDGE_FACTOR <= time && end + TIME_FUDGE_FACTOR >= time;
    });
  };

  /**
   * Returns the TimeRanges that begin later than the specified time.
   * @param {TimeRanges} timeRanges - the TimeRanges object to query
   * @param {number} time - the time to filter on.
   * @returns {TimeRanges} a new TimeRanges object.
   */
  var findNextRange = function findNextRange(timeRanges, time) {
    return filterRanges(timeRanges, function (start) {
      return start - TIME_FUDGE_FACTOR >= time;
    });
  };

  /**
   * Returns gaps within a list of TimeRanges
   * @param {TimeRanges} buffered - the TimeRanges object
   * @return {TimeRanges} a TimeRanges object of gaps
   */
  var findGaps = function findGaps(buffered) {
    if (buffered.length < 2) {
      return videojs$1.createTimeRanges();
    }

    var ranges = [];

    for (var i = 1; i < buffered.length; i++) {
      var start = buffered.end(i - 1);
      var end = buffered.start(i);

      ranges.push([start, end]);
    }

    return videojs$1.createTimeRanges(ranges);
  };

  /**
   * Gets a human readable string for a TimeRange
   *
   * @param {TimeRange} range
   * @returns {String} a human readable string
   */
  var printableRange = function printableRange(range) {
    var strArr = [];

    if (!range || !range.length) {
      return '';
    }

    for (var i = 0; i < range.length; i++) {
      strArr.push(range.start(i) + ' => ' + range.end(i));
    }

    return strArr.join(', ');
  };

  /**
   * Calculates the amount of time left in seconds until the player hits the end of the
   * buffer and causes a rebuffer
   *
   * @param {TimeRange} buffered
   *        The state of the buffer
   * @param {Numnber} currentTime
   *        The current time of the player
   * @param {Number} playbackRate
   *        The current playback rate of the player. Defaults to 1.
   * @return {Number}
   *         Time until the player has to start rebuffering in seconds.
   * @function timeUntilRebuffer
   */
  var timeUntilRebuffer = function timeUntilRebuffer(buffered, currentTime) {
    var playbackRate = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 1;

    var bufferedEnd = buffered.length ? buffered.end(buffered.length - 1) : 0;

    return (bufferedEnd - currentTime) / playbackRate;
  };

  /**
   * Converts a TimeRanges object into an array representation
   * @param {TimeRanges} timeRanges
   * @returns {Array}
   */
  var timeRangesToArray = function timeRangesToArray(timeRanges) {
    var timeRangesList = [];

    for (var i = 0; i < timeRanges.length; i++) {
      timeRangesList.push({
        start: timeRanges.start(i),
        end: timeRanges.end(i)
      });
    }

    return timeRangesList;
  };

  /**
   * @file create-text-tracks-if-necessary.js
   */

  /**
   * Create text tracks on video.js if they exist on a segment.
   *
   * @param {Object} sourceBuffer the VSB or FSB
   * @param {Object} mediaSource the HTML media source
   * @param {Object} segment the segment that may contain the text track
   * @private
   */
  var createTextTracksIfNecessary = function createTextTracksIfNecessary(sourceBuffer, mediaSource, segment) {
    var player = mediaSource.player_;

    // create an in-band caption track if one is present in the segment
    if (segment.captions && segment.captions.length) {
      if (!sourceBuffer.inbandTextTracks_) {
        sourceBuffer.inbandTextTracks_ = {};
      }

      for (var trackId in segment.captionStreams) {
        if (!sourceBuffer.inbandTextTracks_[trackId]) {
          player.tech_.trigger({type: 'usage', name: 'hls-608'});
          var track = player.textTracks().getTrackById(trackId);

          if (track) {
            // Resuse an existing track with a CC# id because this was
            // very likely created by videojs-contrib-hls from information
            // in the m3u8 for us to use
            sourceBuffer.inbandTextTracks_[trackId] = track;
          } else {
            // Otherwise, create a track with the default `CC#` label and
            // without a language
            sourceBuffer.inbandTextTracks_[trackId] = player.addRemoteTextTrack({
              kind: 'captions',
              id: trackId,
              label: trackId
            }, false).track;
          }
        }
      }
    }

    if (segment.metadata && segment.metadata.length && !sourceBuffer.metadataTrack_) {
      sourceBuffer.metadataTrack_ = player.addRemoteTextTrack({
        kind: 'metadata',
        label: 'Timed Metadata'
      }, false).track;
      sourceBuffer.metadataTrack_.inBandMetadataTrackDispatchType = segment.metadata.dispatchType;
    }
  };

  /**
   * @file remove-cues-from-track.js
   */

  /**
   * Remove cues from a track on video.js.
   *
   * @param {Double} start start of where we should remove the cue
   * @param {Double} end end of where the we should remove the cue
   * @param {Object} track the text track to remove the cues from
   * @private
   */
  var removeCuesFromTrack = function removeCuesFromTrack(start, end, track) {
    var i = void 0;
    var cue = void 0;

    if (!track) {
      return;
    }

    if (!track.cues) {
      return;
    }

    i = track.cues.length;

    while (i--) {
      cue = track.cues[i];

      // Remove any overlapping cue
      if (cue.startTime <= end && cue.endTime >= start) {
        track.removeCue(cue);
      }
    }
  };

  /**
   * @file add-text-track-data.js
   */
  /**
   * Define properties on a cue for backwards compatability,
   * but warn the user that the way that they are using it
   * is depricated and will be removed at a later date.
   *
   * @param {Cue} cue the cue to add the properties on
   * @private
   */
  var deprecateOldCue = function deprecateOldCue(cue) {
    Object.defineProperties(cue.frame, {
      id: {
        get: function get$$1() {
          videojs$1.log.warn('cue.frame.id is deprecated. Use cue.value.key instead.');
          return cue.value.key;
        }
      },
      value: {
        get: function get$$1() {
          videojs$1.log.warn('cue.frame.value is deprecated. Use cue.value.data instead.');
          return cue.value.data;
        }
      },
      privateData: {
        get: function get$$1() {
          videojs$1.log.warn('cue.frame.privateData is deprecated. Use cue.value.data instead.');
          return cue.value.data;
        }
      }
    });
  };

  var durationOfVideo = function durationOfVideo(duration) {
    var dur = void 0;

    if (isNaN(duration) || Math.abs(duration) === Infinity) {
      dur = Number.MAX_VALUE;
    } else {
      dur = duration;
    }
    return dur;
  };
  /**
   * Add text track data to a source handler given the captions and
   * metadata from the buffer.
   *
   * @param {Object} sourceHandler the virtual source buffer
   * @param {Array} captionArray an array of caption data
   * @param {Array} metadataArray an array of meta data
   * @private
   */
  var addTextTrackData = function addTextTrackData(sourceHandler, captionArray, metadataArray) {
    var Cue = window_1.WebKitDataCue || window_1.VTTCue;

    if (captionArray) {
      captionArray.forEach(function (caption) {
        var track = caption.stream;

        this.inbandTextTracks_[track].addCue(new Cue(caption.startTime + this.timestampOffset, caption.endTime + this.timestampOffset, caption.text));
      }, sourceHandler);
    }

    if (metadataArray) {
      var videoDuration = durationOfVideo(sourceHandler.mediaSource_.duration);

      metadataArray.forEach(function (metadata) {
        var time = metadata.cueTime + this.timestampOffset;

        metadata.frames.forEach(function (frame) {
          var cue = new Cue(time, time, frame.value || frame.url || frame.data || '');

          cue.frame = frame;
          cue.value = frame;
          deprecateOldCue(cue);

          this.metadataTrack_.addCue(cue);
        }, this);
      }, sourceHandler);

      // Updating the metadeta cues so that
      // the endTime of each cue is the startTime of the next cue
      // the endTime of last cue is the duration of the video
      if (sourceHandler.metadataTrack_ && sourceHandler.metadataTrack_.cues && sourceHandler.metadataTrack_.cues.length) {
        var cues = sourceHandler.metadataTrack_.cues;
        var cuesArray = [];

        // Create a copy of the TextTrackCueList...
        // ...disregarding cues with a falsey value
        for (var i = 0; i < cues.length; i++) {
          if (cues[i]) {
            cuesArray.push(cues[i]);
          }
        }

        // Group cues by their startTime value
        var cuesGroupedByStartTime = cuesArray.reduce(function (obj, cue) {
          var timeSlot = obj[cue.startTime] || [];

          timeSlot.push(cue);
          obj[cue.startTime] = timeSlot;

          return obj;
        }, {});

        // Sort startTimes by ascending order
        var sortedStartTimes = Object.keys(cuesGroupedByStartTime).sort(function (a, b) {
          return Number(a) - Number(b);
        });

        // Map each cue group's endTime to the next group's startTime
        sortedStartTimes.forEach(function (startTime, idx) {
          var cueGroup = cuesGroupedByStartTime[startTime];
          var nextTime = Number(sortedStartTimes[idx + 1]) || videoDuration;

          // Map each cue's endTime the next group's startTime
          cueGroup.forEach(function (cue) {
            cue.endTime = nextTime;
          });
        });
      }
    }
  };

  var win$1 = typeof window !== 'undefined' ? window : {},
    TARGET = typeof Symbol === 'undefined' ? '__target' : Symbol(),
    SCRIPT_TYPE = 'application/javascript',
    BlobBuilder = win$1.BlobBuilder || win$1.WebKitBlobBuilder || win$1.MozBlobBuilder || win$1.MSBlobBuilder,
    URL = win$1.URL || win$1.webkitURL || URL && URL.msURL,
    Worker = win$1.Worker;

  /**
   * Returns a wrapper around Web Worker code that is constructible.
   *
   * @function shimWorker
   *
   * @param { String }    filename    The name of the file
   * @param { Function }  fn          Function wrapping the code of the worker
   */
  function shimWorker(filename, fn) {
    return function ShimWorker(forceFallback) {
      var o = this;

      if (!fn) {
        return new Worker(filename);
      } else if (Worker && !forceFallback) {
        // Convert the function's inner code to a string to construct the worker
        var source = fn.toString().replace(/^function.+?{/, '').slice(0, -1),
          objURL = createSourceObject(source);

        this[TARGET] = new Worker(objURL);
        wrapTerminate(this[TARGET], objURL);
        return this[TARGET];
      } else {
        var selfShim = {
          postMessage: function postMessage(m) {
            if (o.onmessage) {
              setTimeout(function () {
                o.onmessage({data: m, target: selfShim});
              });
            }
          }
        };

        fn.call(selfShim);
        this.postMessage = function (m) {
          setTimeout(function () {
            selfShim.onmessage({data: m, target: o});
          });
        };
        this.isThisThread = true;
      }
    };
  }

  // Test Worker capabilities
  if (Worker) {
    var testWorker,
      objURL = createSourceObject('self.onmessage = function () {}'),
      testArray = new Uint8Array(1);

    try {
      testWorker = new Worker(objURL);

      // Native browser on some Samsung devices throws for transferables, let's detect it
      testWorker.postMessage(testArray, [testArray.buffer]);
    } catch (e) {
      Worker = null;
    } finally {
      URL.revokeObjectURL(objURL);
      if (testWorker) {
        testWorker.terminate();
      }
    }
  }

  function createSourceObject(str) {
    try {
      return URL.createObjectURL(new Blob([str], {type: SCRIPT_TYPE}));
    } catch (e) {
      var blob = new BlobBuilder();
      blob.append(str);
      return URL.createObjectURL(blob.getBlob(type));
    }
  }

  function wrapTerminate(worker, objURL) {
    if (!worker || !objURL) return;
    var term = worker.terminate;
    worker.objURL = objURL;
    worker.terminate = function () {
      if (worker.objURL) URL.revokeObjectURL(worker.objURL);
      term.call(worker);
    };
  }

  var TransmuxWorker = new shimWorker("./transmuxer-worker.worker.js", function (window, document$$1) {
    var self = this;
    var transmuxerWorker = function () {

      var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

      var win;

      if (typeof window !== "undefined") {
        win = window;
      } else if (typeof commonjsGlobal !== "undefined") {
        win = commonjsGlobal;
      } else if (typeof self !== "undefined") {
        win = self;
      } else {
        win = {};
      }

      var window_1$$1 = win;

      /**
       * mux.js
       *
       * Copyright (c) 2015 Brightcove
       * All rights reserved.
       *
       * Functions that generate fragmented MP4s suitable for use with Media
       * Source Extensions.
       */

      var UINT32_MAX = Math.pow(2, 32) - 1;

      var box, dinf, esds, ftyp, mdat, mfhd, minf, moof, moov, mvex, mvhd, trak, tkhd, mdia, mdhd, hdlr, sdtp, stbl,
        stsd, traf, trex, trun, types, MAJOR_BRAND, MINOR_VERSION, AVC1_BRAND, VIDEO_HDLR, AUDIO_HDLR, HDLR_TYPES, VMHD,
        SMHD, DREF, STCO, STSC, STSZ, STTS;

      // pre-calculate constants
      (function () {
        var i;
        types = {
          avc1: [], // codingname
          avcC: [],
          btrt: [],
          dinf: [],
          dref: [],
          esds: [],
          ftyp: [],
          hdlr: [],
          mdat: [],
          mdhd: [],
          mdia: [],
          mfhd: [],
          minf: [],
          moof: [],
          moov: [],
          mp4a: [], // codingname
          mvex: [],
          mvhd: [],
          sdtp: [],
          smhd: [],
          stbl: [],
          stco: [],
          stsc: [],
          stsd: [],
          stsz: [],
          stts: [],
          styp: [],
          tfdt: [],
          tfhd: [],
          traf: [],
          trak: [],
          trun: [],
          trex: [],
          tkhd: [],
          vmhd: []
        };

        // In environments where Uint8Array is undefined (e.g., IE8), skip set up so that we
        // don't throw an error
        if (typeof Uint8Array === 'undefined') {
          return;
        }

        for (i in types) {
          if (types.hasOwnProperty(i)) {
            types[i] = [i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3)];
          }
        }

        MAJOR_BRAND = new Uint8Array(['i'.charCodeAt(0), 's'.charCodeAt(0), 'o'.charCodeAt(0), 'm'.charCodeAt(0)]);
        AVC1_BRAND = new Uint8Array(['a'.charCodeAt(0), 'v'.charCodeAt(0), 'c'.charCodeAt(0), '1'.charCodeAt(0)]);
        MINOR_VERSION = new Uint8Array([0, 0, 0, 1]);
        VIDEO_HDLR = new Uint8Array([0x00, // version 0
          0x00, 0x00, 0x00, // flags
          0x00, 0x00, 0x00, 0x00, // pre_defined
          0x76, 0x69, 0x64, 0x65, // handler_type: 'vide'
          0x00, 0x00, 0x00, 0x00, // reserved
          0x00, 0x00, 0x00, 0x00, // reserved
          0x00, 0x00, 0x00, 0x00, // reserved
          0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'
        ]);
        AUDIO_HDLR = new Uint8Array([0x00, // version 0
          0x00, 0x00, 0x00, // flags
          0x00, 0x00, 0x00, 0x00, // pre_defined
          0x73, 0x6f, 0x75, 0x6e, // handler_type: 'soun'
          0x00, 0x00, 0x00, 0x00, // reserved
          0x00, 0x00, 0x00, 0x00, // reserved
          0x00, 0x00, 0x00, 0x00, // reserved
          0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'
        ]);
        HDLR_TYPES = {
          video: VIDEO_HDLR,
          audio: AUDIO_HDLR
        };
        DREF = new Uint8Array([0x00, // version 0
          0x00, 0x00, 0x00, // flags
          0x00, 0x00, 0x00, 0x01, // entry_count
          0x00, 0x00, 0x00, 0x0c, // entry_size
          0x75, 0x72, 0x6c, 0x20, // 'url' type
          0x00, // version 0
          0x00, 0x00, 0x01 // entry_flags
        ]);
        SMHD = new Uint8Array([0x00, // version
          0x00, 0x00, 0x00, // flags
          0x00, 0x00, // balance, 0 means centered
          0x00, 0x00 // reserved
        ]);
        STCO = new Uint8Array([0x00, // version
          0x00, 0x00, 0x00, // flags
          0x00, 0x00, 0x00, 0x00 // entry_count
        ]);
        STSC = STCO;
        STSZ = new Uint8Array([0x00, // version
          0x00, 0x00, 0x00, // flags
          0x00, 0x00, 0x00, 0x00, // sample_size
          0x00, 0x00, 0x00, 0x00 // sample_count
        ]);
        STTS = STCO;
        VMHD = new Uint8Array([0x00, // version
          0x00, 0x00, 0x01, // flags
          0x00, 0x00, // graphicsmode
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor
        ]);
      })();

      box = function box(type) {
        var payload = [],
          size = 0,
          i,
          result,
          view;

        for (i = 1; i < arguments.length; i++) {
          payload.push(arguments[i]);
        }

        i = payload.length;

        // calculate the total size we need to allocate
        while (i--) {
          size += payload[i].byteLength;
        }
        result = new Uint8Array(size + 8);
        view = new DataView(result.buffer, result.byteOffset, result.byteLength);
        view.setUint32(0, result.byteLength);
        result.set(type, 4);

        // copy the payload into the result
        for (i = 0, size = 8; i < payload.length; i++) {
          result.set(payload[i], size);
          size += payload[i].byteLength;
        }
        return result;
      };

      dinf = function dinf() {
        return box(types.dinf, box(types.dref, DREF));
      };

      esds = function esds(track) {
        return box(types.esds, new Uint8Array([0x00, // version
          0x00, 0x00, 0x00, // flags

          // ES_Descriptor
          0x03, // tag, ES_DescrTag
          0x19, // length
          0x00, 0x00, // ES_ID
          0x00, // streamDependenceFlag, URL_flag, reserved, streamPriority

          // DecoderConfigDescriptor
          0x04, // tag, DecoderConfigDescrTag
          0x11, // length
          0x40, // object type
          0x15, // streamType
          0x00, 0x06, 0x00, // bufferSizeDB
          0x00, 0x00, 0xda, 0xc0, // maxBitrate
          0x00, 0x00, 0xda, 0xc0, // avgBitrate

          // DecoderSpecificInfo
          0x05, // tag, DecoderSpecificInfoTag
          0x02, // length
          // ISO/IEC 14496-3, AudioSpecificConfig
          // for samplingFrequencyIndex see ISO/IEC 13818-7:2006, 8.1.3.2.2, Table 35
          track.audioobjecttype << 3 | track.samplingfrequencyindex >>> 1, track.samplingfrequencyindex << 7 | track.channelcount << 3, 0x06, 0x01, 0x02 // GASpecificConfig
        ]));
      };

      ftyp = function ftyp() {
        return box(types.ftyp, MAJOR_BRAND, MINOR_VERSION, MAJOR_BRAND, AVC1_BRAND);
      };

      hdlr = function hdlr(type) {
        return box(types.hdlr, HDLR_TYPES[type]);
      };
      mdat = function mdat(data) {
        return box(types.mdat, data);
      };
      mdhd = function mdhd(track) {
        var result = new Uint8Array([0x00, // version 0
          0x00, 0x00, 0x00, // flags
          0x00, 0x00, 0x00, 0x02, // creation_time
          0x00, 0x00, 0x00, 0x03, // modification_time
          0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 "ticks" per second

          track.duration >>> 24 & 0xFF, track.duration >>> 16 & 0xFF, track.duration >>> 8 & 0xFF, track.duration & 0xFF, // duration
          0x55, 0xc4, // 'und' language (undetermined)
          0x00, 0x00]);

        // Use the sample rate from the track metadata, when it is
        // defined. The sample rate can be parsed out of an ADTS header, for
        // instance.
        if (track.samplerate) {
          result[12] = track.samplerate >>> 24 & 0xFF;
          result[13] = track.samplerate >>> 16 & 0xFF;
          result[14] = track.samplerate >>> 8 & 0xFF;
          result[15] = track.samplerate & 0xFF;
        }

        return box(types.mdhd, result);
      };
      mdia = function mdia(track) {
        return box(types.mdia, mdhd(track), hdlr(track.type), minf(track));
      };
      mfhd = function mfhd(sequenceNumber) {
        return box(types.mfhd, new Uint8Array([0x00, 0x00, 0x00, 0x00, // flags
          (sequenceNumber & 0xFF000000) >> 24, (sequenceNumber & 0xFF0000) >> 16, (sequenceNumber & 0xFF00) >> 8, sequenceNumber & 0xFF // sequence_number
        ]));
      };
      minf = function minf(track) {
        return box(types.minf, track.type === 'video' ? box(types.vmhd, VMHD) : box(types.smhd, SMHD), dinf(), stbl(track));
      };
      moof = function moof(sequenceNumber, tracks) {
        var trackFragments = [],
          i = tracks.length;
        // build traf boxes for each track fragment
        while (i--) {
          trackFragments[i] = traf(tracks[i]);
        }
        return box.apply(null, [types.moof, mfhd(sequenceNumber)].concat(trackFragments));
      };
      /**
       * Returns a movie box.
       * @param tracks {array} the tracks associated with this movie
       * @see ISO/IEC 14496-12:2012(E), section 8.2.1
       */
      moov = function moov(tracks) {
        var i = tracks.length,
          boxes = [];

        while (i--) {
          boxes[i] = trak(tracks[i]);
        }

        return box.apply(null, [types.moov, mvhd(0xffffffff)].concat(boxes).concat(mvex(tracks)));
      };
      mvex = function mvex(tracks) {
        var i = tracks.length,
          boxes = [];

        while (i--) {
          boxes[i] = trex(tracks[i]);
        }
        return box.apply(null, [types.mvex].concat(boxes));
      };
      mvhd = function mvhd(duration) {
        var bytes = new Uint8Array([0x00, // version 0
          0x00, 0x00, 0x00, // flags
          0x00, 0x00, 0x00, 0x01, // creation_time
          0x00, 0x00, 0x00, 0x02, // modification_time
          0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 "ticks" per second
          (duration & 0xFF000000) >> 24, (duration & 0xFF0000) >> 16, (duration & 0xFF00) >> 8, duration & 0xFF, // duration
          0x00, 0x01, 0x00, 0x00, // 1.0 rate
          0x01, 0x00, // 1.0 volume
          0x00, 0x00, // reserved
          0x00, 0x00, 0x00, 0x00, // reserved
          0x00, 0x00, 0x00, 0x00, // reserved
          0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined
          0xff, 0xff, 0xff, 0xff // next_track_ID
        ]);
        return box(types.mvhd, bytes);
      };

      sdtp = function sdtp(track) {
        var samples = track.samples || [],
          bytes = new Uint8Array(4 + samples.length),
          flags,
          i;

        // leave the full box header (4 bytes) all zero

        // write the sample table
        for (i = 0; i < samples.length; i++) {
          flags = samples[i].flags;

          bytes[i + 4] = flags.dependsOn << 4 | flags.isDependedOn << 2 | flags.hasRedundancy;
        }

        return box(types.sdtp, bytes);
      };

      stbl = function stbl(track) {
        return box(types.stbl, stsd(track), box(types.stts, STTS), box(types.stsc, STSC), box(types.stsz, STSZ), box(types.stco, STCO));
      };

      (function () {
        var videoSample, audioSample;

        stsd = function stsd(track) {

          return box(types.stsd, new Uint8Array([0x00, // version 0
            0x00, 0x00, 0x00, // flags
            0x00, 0x00, 0x00, 0x01]), track.type === 'video' ? videoSample(track) : audioSample(track));
        };

        videoSample = function videoSample(track) {
          var sps = track.sps || [],
            pps = track.pps || [],
            sequenceParameterSets = [],
            pictureParameterSets = [],
            i;

          // assemble the SPSs
          for (i = 0; i < sps.length; i++) {
            sequenceParameterSets.push((sps[i].byteLength & 0xFF00) >>> 8);
            sequenceParameterSets.push(sps[i].byteLength & 0xFF); // sequenceParameterSetLength
            sequenceParameterSets = sequenceParameterSets.concat(Array.prototype.slice.call(sps[i])); // SPS
          }

          // assemble the PPSs
          for (i = 0; i < pps.length; i++) {
            pictureParameterSets.push((pps[i].byteLength & 0xFF00) >>> 8);
            pictureParameterSets.push(pps[i].byteLength & 0xFF);
            pictureParameterSets = pictureParameterSets.concat(Array.prototype.slice.call(pps[i]));
          }

          return box(types.avc1, new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved
              0x00, 0x01, // data_reference_index
              0x00, 0x00, // pre_defined
              0x00, 0x00, // reserved
              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined
              (track.width & 0xff00) >> 8, track.width & 0xff, // width
              (track.height & 0xff00) >> 8, track.height & 0xff, // height
              0x00, 0x48, 0x00, 0x00, // horizresolution
              0x00, 0x48, 0x00, 0x00, // vertresolution
              0x00, 0x00, 0x00, 0x00, // reserved
              0x00, 0x01, // frame_count
              0x13, 0x76, 0x69, 0x64, 0x65, 0x6f, 0x6a, 0x73, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x69, 0x62, 0x2d, 0x68, 0x6c, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // compressorname
              0x00, 0x18, // depth = 24
              0x11, 0x11 // pre_defined = -1
            ]), box(types.avcC, new Uint8Array([0x01, // configurationVersion
              track.profileIdc, // AVCProfileIndication
              track.profileCompatibility, // profile_compatibility
              track.levelIdc, // AVCLevelIndication
              0xff // lengthSizeMinusOne, hard-coded to 4 bytes
            ].concat([sps.length // numOfSequenceParameterSets
            ]).concat(sequenceParameterSets).concat([pps.length // numOfPictureParameterSets
            ]).concat(pictureParameterSets))), // "PPS"
            box(types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80, // bufferSizeDB
              0x00, 0x2d, 0xc6, 0xc0, // maxBitrate
              0x00, 0x2d, 0xc6, 0xc0])) // avgBitrate
          );
        };

        audioSample = function audioSample(track) {
          return box(types.mp4a, new Uint8Array([

            // SampleEntry, ISO/IEC 14496-12
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved
            0x00, 0x01, // data_reference_index

            // AudioSampleEntry, ISO/IEC 14496-12
            0x00, 0x00, 0x00, 0x00, // reserved
            0x00, 0x00, 0x00, 0x00, // reserved
            (track.channelcount & 0xff00) >> 8, track.channelcount & 0xff, // channelcount

            (track.samplesize & 0xff00) >> 8, track.samplesize & 0xff, // samplesize
            0x00, 0x00, // pre_defined
            0x00, 0x00, // reserved

            (track.samplerate & 0xff00) >> 8, track.samplerate & 0xff, 0x00, 0x00 // samplerate, 16.16

            // MP4AudioSampleEntry, ISO/IEC 14496-14
          ]), esds(track));
        };
      })();

      tkhd = function tkhd(track) {
        var result = new Uint8Array([0x00, // version 0
          0x00, 0x00, 0x07, // flags
          0x00, 0x00, 0x00, 0x00, // creation_time
          0x00, 0x00, 0x00, 0x00, // modification_time
          (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID
          0x00, 0x00, 0x00, 0x00, // reserved
          (track.duration & 0xFF000000) >> 24, (track.duration & 0xFF0000) >> 16, (track.duration & 0xFF00) >> 8, track.duration & 0xFF, // duration
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved
          0x00, 0x00, // layer
          0x00, 0x00, // alternate_group
          0x01, 0x00, // non-audio track volume
          0x00, 0x00, // reserved
          0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix
          (track.width & 0xFF00) >> 8, track.width & 0xFF, 0x00, 0x00, // width
          (track.height & 0xFF00) >> 8, track.height & 0xFF, 0x00, 0x00 // height
        ]);

        return box(types.tkhd, result);
      };

      /**
       * Generate a track fragment (traf) box. A traf box collects metadata
       * about tracks in a movie fragment (moof) box.
       */
      traf = function traf(track) {
        var trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable, dataOffset,
          upperWordBaseMediaDecodeTime, lowerWordBaseMediaDecodeTime;

        trackFragmentHeader = box(types.tfhd, new Uint8Array([0x00, // version 0
          0x00, 0x00, 0x3a, // flags
          (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID
          0x00, 0x00, 0x00, 0x01, // sample_description_index
          0x00, 0x00, 0x00, 0x00, // default_sample_duration
          0x00, 0x00, 0x00, 0x00, // default_sample_size
          0x00, 0x00, 0x00, 0x00 // default_sample_flags
        ]));

        upperWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime / (UINT32_MAX + 1));
        lowerWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime % (UINT32_MAX + 1));

        trackFragmentDecodeTime = box(types.tfdt, new Uint8Array([0x01, // version 1
          0x00, 0x00, 0x00, // flags
          // baseMediaDecodeTime
          upperWordBaseMediaDecodeTime >>> 24 & 0xFF, upperWordBaseMediaDecodeTime >>> 16 & 0xFF, upperWordBaseMediaDecodeTime >>> 8 & 0xFF, upperWordBaseMediaDecodeTime & 0xFF, lowerWordBaseMediaDecodeTime >>> 24 & 0xFF, lowerWordBaseMediaDecodeTime >>> 16 & 0xFF, lowerWordBaseMediaDecodeTime >>> 8 & 0xFF, lowerWordBaseMediaDecodeTime & 0xFF]));

        // the data offset specifies the number of bytes from the start of
        // the containing moof to the first payload byte of the associated
        // mdat
        dataOffset = 32 + // tfhd
          20 + // tfdt
          8 + // traf header
          16 + // mfhd
          8 + // moof header
          8; // mdat header

        // audio tracks require less metadata
        if (track.type === 'audio') {
          trackFragmentRun = trun(track, dataOffset);
          return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun);
        }

        // video tracks should contain an independent and disposable samples
        // box (sdtp)
        // generate one and adjust offsets to match
        sampleDependencyTable = sdtp(track);
        trackFragmentRun = trun(track, sampleDependencyTable.length + dataOffset);
        return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable);
      };

      /**
       * Generate a track box.
       * @param track {object} a track definition
       * @return {Uint8Array} the track box
       */
      trak = function trak(track) {
        track.duration = track.duration || 0xffffffff;
        return box(types.trak, tkhd(track), mdia(track));
      };

      trex = function trex(track) {
        var result = new Uint8Array([0x00, // version 0
          0x00, 0x00, 0x00, // flags
          (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID
          0x00, 0x00, 0x00, 0x01, // default_sample_description_index
          0x00, 0x00, 0x00, 0x00, // default_sample_duration
          0x00, 0x00, 0x00, 0x00, // default_sample_size
          0x00, 0x01, 0x00, 0x01 // default_sample_flags
        ]);
        // the last two bytes of default_sample_flags is the sample
        // degradation priority, a hint about the importance of this sample
        // relative to others. Lower the degradation priority for all sample
        // types other than video.
        if (track.type !== 'video') {
          result[result.length - 1] = 0x00;
        }

        return box(types.trex, result);
      };

      (function () {
        var audioTrun, videoTrun, trunHeader;

        // This method assumes all samples are uniform. That is, if a
        // duration is present for the first sample, it will be present for
        // all subsequent samples.
        // see ISO/IEC 14496-12:2012, Section 8.8.8.1
        trunHeader = function trunHeader(samples, offset) {
          var durationPresent = 0,
            sizePresent = 0,
            flagsPresent = 0,
            compositionTimeOffset = 0;

          // trun flag constants
          if (samples.length) {
            if (samples[0].duration !== undefined) {
              durationPresent = 0x1;
            }
            if (samples[0].size !== undefined) {
              sizePresent = 0x2;
            }
            if (samples[0].flags !== undefined) {
              flagsPresent = 0x4;
            }
            if (samples[0].compositionTimeOffset !== undefined) {
              compositionTimeOffset = 0x8;
            }
          }

          return [0x00, // version 0
            0x00, durationPresent | sizePresent | flagsPresent | compositionTimeOffset, 0x01, // flags
            (samples.length & 0xFF000000) >>> 24, (samples.length & 0xFF0000) >>> 16, (samples.length & 0xFF00) >>> 8, samples.length & 0xFF, // sample_count
            (offset & 0xFF000000) >>> 24, (offset & 0xFF0000) >>> 16, (offset & 0xFF00) >>> 8, offset & 0xFF // data_offset
          ];
        };

        videoTrun = function videoTrun(track, offset) {
          var bytes, samples, sample, i;

          samples = track.samples || [];
          offset += 8 + 12 + 16 * samples.length;

          bytes = trunHeader(samples, offset);

          for (i = 0; i < samples.length; i++) {
            sample = samples[i];
            bytes = bytes.concat([(sample.duration & 0xFF000000) >>> 24, (sample.duration & 0xFF0000) >>> 16, (sample.duration & 0xFF00) >>> 8, sample.duration & 0xFF, // sample_duration
              (sample.size & 0xFF000000) >>> 24, (sample.size & 0xFF0000) >>> 16, (sample.size & 0xFF00) >>> 8, sample.size & 0xFF, // sample_size
              sample.flags.isLeading << 2 | sample.flags.dependsOn, sample.flags.isDependedOn << 6 | sample.flags.hasRedundancy << 4 | sample.flags.paddingValue << 1 | sample.flags.isNonSyncSample, sample.flags.degradationPriority & 0xF0 << 8, sample.flags.degradationPriority & 0x0F, // sample_flags
              (sample.compositionTimeOffset & 0xFF000000) >>> 24, (sample.compositionTimeOffset & 0xFF0000) >>> 16, (sample.compositionTimeOffset & 0xFF00) >>> 8, sample.compositionTimeOffset & 0xFF // sample_composition_time_offset
            ]);
          }
          return box(types.trun, new Uint8Array(bytes));
        };

        audioTrun = function audioTrun(track, offset) {
          var bytes, samples, sample, i;

          samples = track.samples || [];
          offset += 8 + 12 + 8 * samples.length;

          bytes = trunHeader(samples, offset);

          for (i = 0; i < samples.length; i++) {
            sample = samples[i];
            bytes = bytes.concat([(sample.duration & 0xFF000000) >>> 24, (sample.duration & 0xFF0000) >>> 16, (sample.duration & 0xFF00) >>> 8, sample.duration & 0xFF, // sample_duration
              (sample.size & 0xFF000000) >>> 24, (sample.size & 0xFF0000) >>> 16, (sample.size & 0xFF00) >>> 8, sample.size & 0xFF]); // sample_size
          }

          return box(types.trun, new Uint8Array(bytes));
        };

        trun = function trun(track, offset) {
          if (track.type === 'audio') {
            return audioTrun(track, offset);
          }

          return videoTrun(track, offset);
        };
      })();

      var mp4Generator = {
        ftyp: ftyp,
        mdat: mdat,
        moof: moof,
        moov: moov,
        initSegment: function initSegment(tracks) {
          var fileType = ftyp(),
            movie = moov(tracks),
            result;

          result = new Uint8Array(fileType.byteLength + movie.byteLength);
          result.set(fileType);
          result.set(movie, fileType.byteLength);
          return result;
        }
      };

      /**
       * mux.js
       *
       * Copyright (c) 2014 Brightcove
       * All rights reserved.
       *
       * A lightweight readable stream implemention that handles event dispatching.
       * Objects that inherit from streams should call init in their constructors.
       */

      var Stream = function Stream() {
        this.init = function () {
          var listeners = {};
          /**
           * Add a listener for a specified event type.
           * @param type {string} the event name
           * @param listener {function} the callback to be invoked when an event of
           * the specified type occurs
           */
          this.on = function (type, listener) {
            if (!listeners[type]) {
              listeners[type] = [];
            }
            listeners[type] = listeners[type].concat(listener);
          };
          /**
           * Remove a listener for a specified event type.
           * @param type {string} the event name
           * @param listener {function} a function previously registered for this
           * type of event through `on`
           */
          this.off = function (type, listener) {
            var index;
            if (!listeners[type]) {
              return false;
            }
            index = listeners[type].indexOf(listener);
            listeners[type] = listeners[type].slice();
            listeners[type].splice(index, 1);
            return index > -1;
          };
          /**
           * Trigger an event of the specified type on this stream. Any additional
           * arguments to this function are passed as parameters to event listeners.
           * @param type {string} the event name
           */
          this.trigger = function (type) {
            var callbacks, i, length, args;
            callbacks = listeners[type];
            if (!callbacks) {
              return;
            }
            // Slicing the arguments on every invocation of this method
            // can add a significant amount of overhead. Avoid the
            // intermediate object creation for the common case of a
            // single callback argument
            if (arguments.length === 2) {
              length = callbacks.length;
              for (i = 0; i < length; ++i) {
                callbacks[i].call(this, arguments[1]);
              }
            } else {
              args = [];
              i = arguments.length;
              for (i = 1; i < arguments.length; ++i) {
                args.push(arguments[i]);
              }
              length = callbacks.length;
              for (i = 0; i < length; ++i) {
                callbacks[i].apply(this, args);
              }
            }
          };
          /**
           * Destroys the stream and cleans up.
           */
          this.dispose = function () {
            listeners = {};
          };
        };
      };

      /**
       * Forwards all `data` events on this stream to the destination stream. The
       * destination stream should provide a method `push` to receive the data
       * events as they arrive.
       * @param destination {stream} the stream that will receive all `data` events
       * @param autoFlush {boolean} if false, we will not call `flush` on the destination
       *                            when the current stream emits a 'done' event
       * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options
       */
      Stream.prototype.pipe = function (destination) {
        this.on('data', function (data) {
          destination.push(data);
        });

        this.on('done', function (flushSource) {
          destination.flush(flushSource);
        });

        return destination;
      };

      // Default stream functions that are expected to be overridden to perform
      // actual work. These are provided by the prototype as a sort of no-op
      // implementation so that we don't have to check for their existence in the
      // `pipe` function above.
      Stream.prototype.push = function (data) {
        this.trigger('data', data);
      };

      Stream.prototype.flush = function (flushSource) {
        this.trigger('done', flushSource);
      };

      var stream = Stream;

      // -----------------
      // Link To Transport
      // -----------------

      // Supplemental enhancement information (SEI) NAL units have a
      // payload type field to indicate how they are to be
      // interpreted. CEAS-708 caption content is always transmitted with
      // payload type 0x04.
      var USER_DATA_REGISTERED_ITU_T_T35 = 4,
        RBSP_TRAILING_BITS = 128;

      /**
       * Parse a supplemental enhancement information (SEI) NAL unit.
       * Stops parsing once a message of type ITU T T35 has been found.
       *
       * @param bytes {Uint8Array} the bytes of a SEI NAL unit
       * @return {object} the parsed SEI payload
       * @see Rec. ITU-T H.264, 7.3.2.3.1
       */
      var parseSei = function parseSei(bytes) {
        var i = 0,
          result = {
            payloadType: -1,
            payloadSize: 0
          },
          payloadType = 0,
          payloadSize = 0;

        // go through the sei_rbsp parsing each each individual sei_message
        while (i < bytes.byteLength) {
          // stop once we have hit the end of the sei_rbsp
          if (bytes[i] === RBSP_TRAILING_BITS) {
            break;
          }

          // Parse payload type
          while (bytes[i] === 0xFF) {
            payloadType += 255;
            i++;
          }
          payloadType += bytes[i++];

          // Parse payload size
          while (bytes[i] === 0xFF) {
            payloadSize += 255;
            i++;
          }
          payloadSize += bytes[i++];

          // this sei_message is a 608/708 caption so save it and break
          // there can only ever be one caption message in a frame's sei
          if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {
            result.payloadType = payloadType;
            result.payloadSize = payloadSize;
            result.payload = bytes.subarray(i, i + payloadSize);
            break;
          }

          // skip the payload and parse the next message
          i += payloadSize;
          payloadType = 0;
          payloadSize = 0;
        }

        return result;
      };

      // see ANSI/SCTE 128-1 (2013), section 8.1
      var parseUserData = function parseUserData(sei) {
        // itu_t_t35_contry_code must be 181 (United States) for
        // captions
        if (sei.payload[0] !== 181) {
          return null;
        }

        // itu_t_t35_provider_code should be 49 (ATSC) for captions
        if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {
          return null;
        }

        // the user_identifier should be "GA94" to indicate ATSC1 data
        if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {
          return null;
        }

        // finally, user_data_type_code should be 0x03 for caption data
        if (sei.payload[7] !== 0x03) {
          return null;
        }

        // return the user_data_type_structure and strip the trailing
        // marker bits
        return sei.payload.subarray(8, sei.payload.length - 1);
      };

      // see CEA-708-D, section 4.4
      var parseCaptionPackets = function parseCaptionPackets(pts, userData) {
        var results = [],
          i,
          count,
          offset,
          data;

        // if this is just filler, return immediately
        if (!(userData[0] & 0x40)) {
          return results;
        }

        // parse out the cc_data_1 and cc_data_2 fields
        count = userData[0] & 0x1f;
        for (i = 0; i < count; i++) {
          offset = i * 3;
          data = {
            type: userData[offset + 2] & 0x03,
            pts: pts
          };

          // capture cc data when cc_valid is 1
          if (userData[offset + 2] & 0x04) {
            data.ccData = userData[offset + 3] << 8 | userData[offset + 4];
            results.push(data);
          }
        }
        return results;
      };

      var CaptionStream = function CaptionStream() {

        CaptionStream.prototype.init.call(this);

        this.captionPackets_ = [];

        this.ccStreams_ = [new Cea608Stream(0, 0), // eslint-disable-line no-use-before-define
          new Cea608Stream(0, 1), // eslint-disable-line no-use-before-define
          new Cea608Stream(1, 0), // eslint-disable-line no-use-before-define
          new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define
        ];

        this.reset();

        // forward data and done events from CCs to this CaptionStream
        this.ccStreams_.forEach(function (cc) {
          cc.on('data', this.trigger.bind(this, 'data'));
          cc.on('done', this.trigger.bind(this, 'done'));
        }, this);
      };

      CaptionStream.prototype = new stream();
      CaptionStream.prototype.push = function (event) {
        var sei, userData;

        // only examine SEI NALs
        if (event.nalUnitType !== 'sei_rbsp') {
          return;
        }

        // parse the sei
        sei = parseSei(event.escapedRBSP);

        // ignore everything but user_data_registered_itu_t_t35
        if (sei.payloadType !== USER_DATA_REGISTERED_ITU_T_T35) {
          return;
        }

        // parse out the user data payload
        userData = parseUserData(sei);

        // ignore unrecognized userData
        if (!userData) {
          return;
        }

        // Sometimes, the same segment # will be downloaded twice. To stop the
        // caption data from being processed twice, we track the latest dts we've
        // received and ignore everything with a dts before that. However, since
        // data for a specific dts can be split across packets on either side of
        // a segment boundary, we need to make sure we *don't* ignore the packets
        // from the *next* segment that have dts === this.latestDts_. By constantly
        // tracking the number of packets received with dts === this.latestDts_, we
        // know how many should be ignored once we start receiving duplicates.
        if (event.dts < this.latestDts_) {
          // We've started getting older data, so set the flag.
          this.ignoreNextEqualDts_ = true;
          return;
        } else if (event.dts === this.latestDts_ && this.ignoreNextEqualDts_) {
          this.numSameDts_--;
          if (!this.numSameDts_) {
            // We've received the last duplicate packet, time to start processing again
            this.ignoreNextEqualDts_ = false;
          }
          return;
        }

        // parse out CC data packets and save them for later
        this.captionPackets_ = this.captionPackets_.concat(parseCaptionPackets(event.pts, userData));
        if (this.latestDts_ !== event.dts) {
          this.numSameDts_ = 0;
        }
        this.numSameDts_++;
        this.latestDts_ = event.dts;
      };

      CaptionStream.prototype.flush = function () {
        // make sure we actually parsed captions before proceeding
        if (!this.captionPackets_.length) {
          this.ccStreams_.forEach(function (cc) {
            cc.flush();
          }, this);
          return;
        }

        // In Chrome, the Array#sort function is not stable so add a
        // presortIndex that we can use to ensure we get a stable-sort
        this.captionPackets_.forEach(function (elem, idx) {
          elem.presortIndex = idx;
        });

        // sort caption byte-pairs based on their PTS values
        this.captionPackets_.sort(function (a, b) {
          if (a.pts === b.pts) {
            return a.presortIndex - b.presortIndex;
          }
          return a.pts - b.pts;
        });

        this.captionPackets_.forEach(function (packet) {
          if (packet.type < 2) {
            // Dispatch packet to the right Cea608Stream
            this.dispatchCea608Packet(packet);
          }
          // this is where an 'else' would go for a dispatching packets
          // to a theoretical Cea708Stream that handles SERVICEn data
        }, this);

        this.captionPackets_.length = 0;
        this.ccStreams_.forEach(function (cc) {
          cc.flush();
        }, this);
        return;
      };

      CaptionStream.prototype.reset = function () {
        this.latestDts_ = null;
        this.ignoreNextEqualDts_ = false;
        this.numSameDts_ = 0;
        this.activeCea608Channel_ = [null, null];
        this.ccStreams_.forEach(function (ccStream) {
          ccStream.reset();
        });
      };

      CaptionStream.prototype.dispatchCea608Packet = function (packet) {
        // NOTE: packet.type is the CEA608 field
        if (this.setsChannel1Active(packet)) {
          this.activeCea608Channel_[packet.type] = 0;
        } else if (this.setsChannel2Active(packet)) {
          this.activeCea608Channel_[packet.type] = 1;
        }
        if (this.activeCea608Channel_[packet.type] === null) {
          // If we haven't received anything to set the active channel, discard the
          // data; we don't want jumbled captions
          return;
        }
        this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);
      };

      CaptionStream.prototype.setsChannel1Active = function (packet) {
        return (packet.ccData & 0x7800) === 0x1000;
      };
      CaptionStream.prototype.setsChannel2Active = function (packet) {
        return (packet.ccData & 0x7800) === 0x1800;
      };

      // ----------------------
      // Session to Application
      // ----------------------

      var CHARACTER_TRANSLATION = {
        0x2a: 0xe1, // á
        0x5c: 0xe9, // é
        0x5e: 0xed, // í
        0x5f: 0xf3, // ó
        0x60: 0xfa, // ú
        0x7b: 0xe7, // ç
        0x7c: 0xf7, // ÷
        0x7d: 0xd1, // Ñ
        0x7e: 0xf1, // ñ
        0x7f: 0x2588, // █
        0x0130: 0xae, // ®
        0x0131: 0xb0, // °
        0x0132: 0xbd, // ½
        0x0133: 0xbf, // ¿
        0x0134: 0x2122, // ™
        0x0135: 0xa2, // ¢
        0x0136: 0xa3, // £
        0x0137: 0x266a, // ♪
        0x0138: 0xe0, // à
        0x0139: 0xa0, //
        0x013a: 0xe8, // è
        0x013b: 0xe2, // â
        0x013c: 0xea, // ê
        0x013d: 0xee, // î
        0x013e: 0xf4, // ô
        0x013f: 0xfb, // û
        0x0220: 0xc1, // Á
        0x0221: 0xc9, // É
        0x0222: 0xd3, // Ó
        0x0223: 0xda, // Ú
        0x0224: 0xdc, // Ü
        0x0225: 0xfc, // ü
        0x0226: 0x2018, // ‘
        0x0227: 0xa1, // ¡
        0x0228: 0x2a, // *
        0x0229: 0x27, // '
        0x022a: 0x2014, // —
        0x022b: 0xa9, // ©
        0x022c: 0x2120, // ℠
        0x022d: 0x2022, // •
        0x022e: 0x201c, // “
        0x022f: 0x201d, // ”
        0x0230: 0xc0, // À
        0x0231: 0xc2, // Â
        0x0232: 0xc7, // Ç
        0x0233: 0xc8, // È
        0x0234: 0xca, // Ê
        0x0235: 0xcb, // Ë
        0x0236: 0xeb, // ë
        0x0237: 0xce, // Î
        0x0238: 0xcf, // Ï
        0x0239: 0xef, // ï
        0x023a: 0xd4, // Ô
        0x023b: 0xd9, // Ù
        0x023c: 0xf9, // ù
        0x023d: 0xdb, // Û
        0x023e: 0xab, // «
        0x023f: 0xbb, // »
        0x0320: 0xc3, // Ã
        0x0321: 0xe3, // ã
        0x0322: 0xcd, // Í
        0x0323: 0xcc, // Ì
        0x0324: 0xec, // ì
        0x0325: 0xd2, // Ò
        0x0326: 0xf2, // ò
        0x0327: 0xd5, // Õ
        0x0328: 0xf5, // õ
        0x0329: 0x7b, // {
        0x032a: 0x7d, // }
        0x032b: 0x5c, // \
        0x032c: 0x5e, // ^
        0x032d: 0x5f, // _
        0x032e: 0x7c, // |
        0x032f: 0x7e, // ~
        0x0330: 0xc4, // Ä
        0x0331: 0xe4, // ä
        0x0332: 0xd6, // Ö
        0x0333: 0xf6, // ö
        0x0334: 0xdf, // ß
        0x0335: 0xa5, // ¥
        0x0336: 0xa4, // ¤
        0x0337: 0x2502, // │
        0x0338: 0xc5, // Å
        0x0339: 0xe5, // å
        0x033a: 0xd8, // Ø
        0x033b: 0xf8, // ø
        0x033c: 0x250c, // ┌
        0x033d: 0x2510, // ┐
        0x033e: 0x2514, // └
        0x033f: 0x2518 // ┘
      };

      var getCharFromCode = function getCharFromCode(code) {
        if (code === null) {
          return '';
        }
        code = CHARACTER_TRANSLATION[code] || code;
        return String.fromCharCode(code);
      };

      // the index of the last row in a CEA-608 display buffer
      var BOTTOM_ROW = 14;

      // This array is used for mapping PACs -> row #, since there's no way of
      // getting it through bit logic.
      var ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620, 0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420];

      // CEA-608 captions are rendered onto a 34x15 matrix of character
      // cells. The "bottom" row is the last element in the outer array.
      var createDisplayBuffer = function createDisplayBuffer() {
        var result = [],
          i = BOTTOM_ROW + 1;
        while (i--) {
          result.push('');
        }
        return result;
      };

      var Cea608Stream = function Cea608Stream(field, dataChannel) {
        Cea608Stream.prototype.init.call(this);

        this.field_ = field || 0;
        this.dataChannel_ = dataChannel || 0;

        this.name_ = 'CC' + ((this.field_ << 1 | this.dataChannel_) + 1);

        this.setConstants();
        this.reset();

        this.push = function (packet) {
          var data, swap, char0, char1, text;
          // remove the parity bits
          data = packet.ccData & 0x7f7f;

          // ignore duplicate control codes; the spec demands they're sent twice
          if (data === this.lastControlCode_) {
            this.lastControlCode_ = null;
            return;
          }

          // Store control codes
          if ((data & 0xf000) === 0x1000) {
            this.lastControlCode_ = data;
          } else if (data !== this.PADDING_) {
            this.lastControlCode_ = null;
          }

          char0 = data >>> 8;
          char1 = data & 0xff;

          if (data === this.PADDING_) {
            return;
          } else if (data === this.RESUME_CAPTION_LOADING_) {
            this.mode_ = 'popOn';
          } else if (data === this.END_OF_CAPTION_) {
            this.clearFormatting(packet.pts);
            // if a caption was being displayed, it's gone now
            this.flushDisplayed(packet.pts);

            // flip memory
            swap = this.displayed_;
            this.displayed_ = this.nonDisplayed_;
            this.nonDisplayed_ = swap;

            // start measuring the time to display the caption
            this.startPts_ = packet.pts;
          } else if (data === this.ROLL_UP_2_ROWS_) {
            this.topRow_ = BOTTOM_ROW - 1;
            this.mode_ = 'rollUp';
          } else if (data === this.ROLL_UP_3_ROWS_) {
            this.topRow_ = BOTTOM_ROW - 2;
            this.mode_ = 'rollUp';
          } else if (data === this.ROLL_UP_4_ROWS_) {
            this.topRow_ = BOTTOM_ROW - 3;
            this.mode_ = 'rollUp';
          } else if (data === this.CARRIAGE_RETURN_) {
            this.clearFormatting(packet.pts);
            this.flushDisplayed(packet.pts);
            this.shiftRowsUp_();
            this.startPts_ = packet.pts;
          } else if (data === this.BACKSPACE_) {
            if (this.mode_ === 'popOn') {
              this.nonDisplayed_[BOTTOM_ROW] = this.nonDisplayed_[BOTTOM_ROW].slice(0, -1);
            } else {
              this.displayed_[BOTTOM_ROW] = this.displayed_[BOTTOM_ROW].slice(0, -1);
            }
          } else if (data === this.ERASE_DISPLAYED_MEMORY_) {
            this.flushDisplayed(packet.pts);
            this.displayed_ = createDisplayBuffer();
          } else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {
            this.nonDisplayed_ = createDisplayBuffer();
          } else if (data === this.RESUME_DIRECT_CAPTIONING_) {
            this.mode_ = 'paintOn';

            // Append special characters to caption text
          } else if (this.isSpecialCharacter(char0, char1)) {
            // Bitmask char0 so that we can apply character transformations
            // regardless of field and data channel.
            // Then byte-shift to the left and OR with char1 so we can pass the
            // entire character code to `getCharFromCode`.
            char0 = (char0 & 0x03) << 8;
            text = getCharFromCode(char0 | char1);
            this[this.mode_](packet.pts, text);
            this.column_++;

            // Append extended characters to caption text
          } else if (this.isExtCharacter(char0, char1)) {
            // Extended characters always follow their "non-extended" equivalents.
            // IE if a "è" is desired, you'll always receive "eè"; non-compliant
            // decoders are supposed to drop the "è", while compliant decoders
            // backspace the "e" and insert "è".

            // Delete the previous character
            if (this.mode_ === 'popOn') {
              this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);
            } else {
              this.displayed_[BOTTOM_ROW] = this.displayed_[BOTTOM_ROW].slice(0, -1);
            }

            // Bitmask char0 so that we can apply character transformations
            // regardless of field and data channel.
            // Then byte-shift to the left and OR with char1 so we can pass the
            // entire character code to `getCharFromCode`.
            char0 = (char0 & 0x03) << 8;
            text = getCharFromCode(char0 | char1);
            this[this.mode_](packet.pts, text);
            this.column_++;

            // Process mid-row codes
          } else if (this.isMidRowCode(char0, char1)) {
            // Attributes are not additive, so clear all formatting
            this.clearFormatting(packet.pts);

            // According to the standard, mid-row codes
            // should be replaced with spaces, so add one now
            this[this.mode_](packet.pts, ' ');
            this.column_++;

            if ((char1 & 0xe) === 0xe) {
              this.addFormatting(packet.pts, ['i']);
            }

            if ((char1 & 0x1) === 0x1) {
              this.addFormatting(packet.pts, ['u']);
            }

            // Detect offset control codes and adjust cursor
          } else if (this.isOffsetControlCode(char0, char1)) {
            // Cursor position is set by indent PAC (see below) in 4-column
            // increments, with an additional offset code of 1-3 to reach any
            // of the 32 columns specified by CEA-608. So all we need to do
            // here is increment the column cursor by the given offset.
            this.column_ += char1 & 0x03;

            // Detect PACs (Preamble Address Codes)
          } else if (this.isPAC(char0, char1)) {

            // There's no logic for PAC -> row mapping, so we have to just
            // find the row code in an array and use its index :(
            var row = ROWS.indexOf(data & 0x1f20);

            if (row !== this.row_) {
              // formatting is only persistent for current row
              this.clearFormatting(packet.pts);
              this.row_ = row;
            }
            // All PACs can apply underline, so detect and apply
            // (All odd-numbered second bytes set underline)
            if (char1 & 0x1 && this.formatting_.indexOf('u') === -1) {
              this.addFormatting(packet.pts, ['u']);
            }

            if ((data & 0x10) === 0x10) {
              // We've got an indent level code. Each successive even number
              // increments the column cursor by 4, so we can get the desired
              // column position by bit-shifting to the right (to get n/2)
              // and multiplying by 4.
              this.column_ = ((data & 0xe) >> 1) * 4;
            }

            if (this.isColorPAC(char1)) {
              // it's a color code, though we only support white, which
              // can be either normal or italicized. white italics can be
              // either 0x4e or 0x6e depending on the row, so we just
              // bitwise-and with 0xe to see if italics should be turned on
              if ((char1 & 0xe) === 0xe) {
                this.addFormatting(packet.pts, ['i']);
              }
            }

            // We have a normal character in char0, and possibly one in char1
          } else if (this.isNormalChar(char0)) {
            if (char1 === 0x00) {
              char1 = null;
            }
            text = getCharFromCode(char0);
            text += getCharFromCode(char1);
            this[this.mode_](packet.pts, text);
            this.column_ += text.length;
          } // finish data processing
        };
      };
      Cea608Stream.prototype = new stream();
      // Trigger a cue point that captures the current state of the
      // display buffer
      Cea608Stream.prototype.flushDisplayed = function (pts) {
        var content = this.displayed_
        // remove spaces from the start and end of the string
          .map(function (row) {
            return row.trim();
          })
          // combine all text rows to display in one cue
          .join('\n')
          // and remove blank rows from the start and end, but not the middle
          .replace(/^\n+|\n+$/g, '');

        if (content.length) {
          this.trigger('data', {
            startPts: this.startPts_,
            endPts: pts,
            text: content,
            stream: this.name_
          });
        }
      };

      /**
       * Zero out the data, used for startup and on seek
       */
      Cea608Stream.prototype.reset = function () {
        this.mode_ = 'popOn';
        // When in roll-up mode, the index of the last row that will
        // actually display captions. If a caption is shifted to a row
        // with a lower index than this, it is cleared from the display
        // buffer
        this.topRow_ = 0;
        this.startPts_ = 0;
        this.displayed_ = createDisplayBuffer();
        this.nonDisplayed_ = createDisplayBuffer();
        this.lastControlCode_ = null;

        // Track row and column for proper line-breaking and spacing
        this.column_ = 0;
        this.row_ = BOTTOM_ROW;

        // This variable holds currently-applied formatting
        this.formatting_ = [];
      };

      /**
       * Sets up control code and related constants for this instance
       */
      Cea608Stream.prototype.setConstants = function () {
        // The following attributes have these uses:
        // ext_ :    char0 for mid-row codes, and the base for extended
        //           chars (ext_+0, ext_+1, and ext_+2 are char0s for
        //           extended codes)
        // control_: char0 for control codes, except byte-shifted to the
        //           left so that we can do this.control_ | CONTROL_CODE
        // offset_:  char0 for tab offset codes
        //
        // It's also worth noting that control codes, and _only_ control codes,
        // differ between field 1 and field2. Field 2 control codes are always
        // their field 1 value plus 1. That's why there's the "| field" on the
        // control value.
        if (this.dataChannel_ === 0) {
          this.BASE_ = 0x10;
          this.EXT_ = 0x11;
          this.CONTROL_ = (0x14 | this.field_) << 8;
          this.OFFSET_ = 0x17;
        } else if (this.dataChannel_ === 1) {
          this.BASE_ = 0x18;
          this.EXT_ = 0x19;
          this.CONTROL_ = (0x1c | this.field_) << 8;
          this.OFFSET_ = 0x1f;
        }

        // Constants for the LSByte command codes recognized by Cea608Stream. This
        // list is not exhaustive. For a more comprehensive listing and semantics see
        // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf
        // Padding
        this.PADDING_ = 0x0000;
        // Pop-on Mode
        this.RESUME_CAPTION_LOADING_ = this.CONTROL_ | 0x20;
        this.END_OF_CAPTION_ = this.CONTROL_ | 0x2f;
        // Roll-up Mode
        this.ROLL_UP_2_ROWS_ = this.CONTROL_ | 0x25;
        this.ROLL_UP_3_ROWS_ = this.CONTROL_ | 0x26;
        this.ROLL_UP_4_ROWS_ = this.CONTROL_ | 0x27;
        this.CARRIAGE_RETURN_ = this.CONTROL_ | 0x2d;
        // paint-on mode (not supported)
        this.RESUME_DIRECT_CAPTIONING_ = this.CONTROL_ | 0x29;
        // Erasure
        this.BACKSPACE_ = this.CONTROL_ | 0x21;
        this.ERASE_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2c;
        this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;
      };

      /**
       * Detects if the 2-byte packet data is a special character
       *
       * Special characters have a second byte in the range 0x30 to 0x3f,
       * with the first byte being 0x11 (for data channel 1) or 0x19 (for
       * data channel 2).
       *
       * @param  {Integer} char0 The first byte
       * @param  {Integer} char1 The second byte
       * @return {Boolean}       Whether the 2 bytes are an special character
       */
      Cea608Stream.prototype.isSpecialCharacter = function (char0, char1) {
        return char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f;
      };

      /**
       * Detects if the 2-byte packet data is an extended character
       *
       * Extended characters have a second byte in the range 0x20 to 0x3f,
       * with the first byte being 0x12 or 0x13 (for data channel 1) or
       * 0x1a or 0x1b (for data channel 2).
       *
       * @param  {Integer} char0 The first byte
       * @param  {Integer} char1 The second byte
       * @return {Boolean}       Whether the 2 bytes are an extended character
       */
      Cea608Stream.prototype.isExtCharacter = function (char0, char1) {
        return (char0 === this.EXT_ + 1 || char0 === this.EXT_ + 2) && char1 >= 0x20 && char1 <= 0x3f;
      };

      /**
       * Detects if the 2-byte packet is a mid-row code
       *
       * Mid-row codes have a second byte in the range 0x20 to 0x2f, with
       * the first byte being 0x11 (for data channel 1) or 0x19 (for data
       * channel 2).
       *
       * @param  {Integer} char0 The first byte
       * @param  {Integer} char1 The second byte
       * @return {Boolean}       Whether the 2 bytes are a mid-row code
       */
      Cea608Stream.prototype.isMidRowCode = function (char0, char1) {
        return char0 === this.EXT_ && char1 >= 0x20 && char1 <= 0x2f;
      };

      /**
       * Detects if the 2-byte packet is an offset control code
       *
       * Offset control codes have a second byte in the range 0x21 to 0x23,
       * with the first byte being 0x17 (for data channel 1) or 0x1f (for
       * data channel 2).
       *
       * @param  {Integer} char0 The first byte
       * @param  {Integer} char1 The second byte
       * @return {Boolean}       Whether the 2 bytes are an offset control code
       */
      Cea608Stream.prototype.isOffsetControlCode = function (char0, char1) {
        return char0 === this.OFFSET_ && char1 >= 0x21 && char1 <= 0x23;
      };

      /**
       * Detects if the 2-byte packet is a Preamble Address Code
       *
       * PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)
       * or 0x18 to 0x1f (for data channel 2), with the second byte in the
       * range 0x40 to 0x7f.
       *
       * @param  {Integer} char0 The first byte
       * @param  {Integer} char1 The second byte
       * @return {Boolean}       Whether the 2 bytes are a PAC
       */
      Cea608Stream.prototype.isPAC = function (char0, char1) {
        return char0 >= this.BASE_ && char0 < this.BASE_ + 8 && char1 >= 0x40 && char1 <= 0x7f;
      };

      /**
       * Detects if a packet's second byte is in the range of a PAC color code
       *
       * PAC color codes have the second byte be in the range 0x40 to 0x4f, or
       * 0x60 to 0x6f.
       *
       * @param  {Integer} char1 The second byte
       * @return {Boolean}       Whether the byte is a color PAC
       */
      Cea608Stream.prototype.isColorPAC = function (char1) {
        return char1 >= 0x40 && char1 <= 0x4f || char1 >= 0x60 && char1 <= 0x7f;
      };

      /**
       * Detects if a single byte is in the range of a normal character
       *
       * Normal text bytes are in the range 0x20 to 0x7f.
       *
       * @param  {Integer} char  The byte
       * @return {Boolean}       Whether the byte is a normal character
       */
      Cea608Stream.prototype.isNormalChar = function (char) {
        return char >= 0x20 && char <= 0x7f;
      };

      // Adds the opening HTML tag for the passed character to the caption text,
      // and keeps track of it for later closing
      Cea608Stream.prototype.addFormatting = function (pts, format) {
        this.formatting_ = this.formatting_.concat(format);
        var text = format.reduce(function (text, format) {
          return text + '<' + format + '>';
        }, '');
        this[this.mode_](pts, text);
      };

      // Adds HTML closing tags for current formatting to caption text and
      // clears remembered formatting
      Cea608Stream.prototype.clearFormatting = function (pts) {
        if (!this.formatting_.length) {
          return;
        }
        var text = this.formatting_.reverse().reduce(function (text, format) {
          return text + '</' + format + '>';
        }, '');
        this.formatting_ = [];
        this[this.mode_](pts, text);
      };

      // Mode Implementations
      Cea608Stream.prototype.popOn = function (pts, text) {
        var baseRow = this.nonDisplayed_[this.row_];

        // buffer characters
        baseRow += text;
        this.nonDisplayed_[this.row_] = baseRow;
      };

      Cea608Stream.prototype.rollUp = function (pts, text) {
        var baseRow = this.displayed_[BOTTOM_ROW];

        baseRow += text;
        this.displayed_[BOTTOM_ROW] = baseRow;
      };

      Cea608Stream.prototype.shiftRowsUp_ = function () {
        var i;
        // clear out inactive rows
        for (i = 0; i < this.topRow_; i++) {
          this.displayed_[i] = '';
        }
        // shift displayed rows up
        for (i = this.topRow_; i < BOTTOM_ROW; i++) {
          this.displayed_[i] = this.displayed_[i + 1];
        }
        // clear out the bottom row
        this.displayed_[BOTTOM_ROW] = '';
      };

      // paintOn mode is not implemented
      Cea608Stream.prototype.paintOn = function () {
      };

      // exports
      var captionStream = {
        CaptionStream: CaptionStream,
        Cea608Stream: Cea608Stream
      };

      var streamTypes = {
        H264_STREAM_TYPE: 0x1B,
        ADTS_STREAM_TYPE: 0x0F,
        METADATA_STREAM_TYPE: 0x15
      };

      var MAX_TS = 8589934592;

      var RO_THRESH = 4294967296;

      var handleRollover = function handleRollover(value, reference) {
        var direction = 1;

        if (value > reference) {
          // If the current timestamp value is greater than our reference timestamp and we detect a
          // timestamp rollover, this means the roll over is happening in the opposite direction.
          // Example scenario: Enter a long stream/video just after a rollover occurred. The reference
          // point will be set to a small number, e.g. 1. The user then seeks backwards over the
          // rollover point. In loading this segment, the timestamp values will be very large,
          // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust
          // the time stamp to be `value - 2^33`.
          direction = -1;
        }

        // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will
        // cause an incorrect adjustment.
        while (Math.abs(reference - value) > RO_THRESH) {
          value += direction * MAX_TS;
        }

        return value;
      };

      var TimestampRolloverStream = function TimestampRolloverStream(type) {
        var lastDTS, referenceDTS;

        TimestampRolloverStream.prototype.init.call(this);

        this.type_ = type;

        this.push = function (data) {
          if (data.type !== this.type_) {
            return;
          }

          if (referenceDTS === undefined) {
            referenceDTS = data.dts;
          }

          data.dts = handleRollover(data.dts, referenceDTS);
          data.pts = handleRollover(data.pts, referenceDTS);

          lastDTS = data.dts;

          this.trigger('data', data);
        };

        this.flush = function () {
          referenceDTS = lastDTS;
          this.trigger('done');
        };

        this.discontinuity = function () {
          referenceDTS = void 0;
          lastDTS = void 0;
        };
      };

      TimestampRolloverStream.prototype = new stream();

      var timestampRolloverStream = {
        TimestampRolloverStream: TimestampRolloverStream,
        handleRollover: handleRollover
      };

      var percentEncode = function percentEncode(bytes, start, end) {
          var i,
            result = '';
          for (i = start; i < end; i++) {
            result += '%' + ('00' + bytes[i].toString(16)).slice(-2);
          }
          return result;
        },


        // return the string representation of the specified byte range,
        // interpreted as UTf-8.
        parseUtf8 = function parseUtf8(bytes, start, end) {
          return decodeURIComponent(percentEncode(bytes, start, end));
        },


        // return the string representation of the specified byte range,
        // interpreted as ISO-8859-1.
        parseIso88591 = function parseIso88591(bytes, start, end) {
          return unescape(percentEncode(bytes, start, end)); // jshint ignore:line
        },
        parseSyncSafeInteger = function parseSyncSafeInteger(data) {
          return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];
        },
        tagParsers = {
          TXXX: function TXXX(tag) {
            var i;
            if (tag.data[0] !== 3) {
              // ignore frames with unrecognized character encodings
              return;
            }

            for (i = 1; i < tag.data.length; i++) {
              if (tag.data[i] === 0) {
                // parse the text fields
                tag.description = parseUtf8(tag.data, 1, i);
                // do not include the null terminator in the tag value
                tag.value = parseUtf8(tag.data, i + 1, tag.data.length).replace(/\0*$/, '');
                break;
              }
            }
            tag.data = tag.value;
          },
          WXXX: function WXXX(tag) {
            var i;
            if (tag.data[0] !== 3) {
              // ignore frames with unrecognized character encodings
              return;
            }

            for (i = 1; i < tag.data.length; i++) {
              if (tag.data[i] === 0) {
                // parse the description and URL fields
                tag.description = parseUtf8(tag.data, 1, i);
                tag.url = parseUtf8(tag.data, i + 1, tag.data.length);
                break;
              }
            }
          },
          PRIV: function PRIV(tag) {
            var i;

            for (i = 0; i < tag.data.length; i++) {
              if (tag.data[i] === 0) {
                // parse the description and URL fields
                tag.owner = parseIso88591(tag.data, 0, i);
                break;
              }
            }
            tag.privateData = tag.data.subarray(i + 1);
            tag.data = tag.privateData;
          }
        },
        _MetadataStream;

      _MetadataStream = function MetadataStream(options) {
        var settings = {
            debug: !!(options && options.debug),

            // the bytes of the program-level descriptor field in MP2T
            // see ISO/IEC 13818-1:2013 (E), section 2.6 "Program and
            // program element descriptors"
            descriptor: options && options.descriptor
          },


          // the total size in bytes of the ID3 tag being parsed
          tagSize = 0,


          // tag data that is not complete enough to be parsed
          buffer = [],


          // the total number of bytes currently in the buffer
          bufferSize = 0,
          i;

        _MetadataStream.prototype.init.call(this);

        // calculate the text track in-band metadata track dispatch type
        // https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track
        this.dispatchType = streamTypes.METADATA_STREAM_TYPE.toString(16);
        if (settings.descriptor) {
          for (i = 0; i < settings.descriptor.length; i++) {
            this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);
          }
        }

        this.push = function (chunk) {
          var tag, frameStart, frameSize, frame, i, frameHeader;
          if (chunk.type !== 'timed-metadata') {
            return;
          }

          // if data_alignment_indicator is set in the PES header,
          // we must have the start of a new ID3 tag. Assume anything
          // remaining in the buffer was malformed and throw it out
          if (chunk.dataAlignmentIndicator) {
            bufferSize = 0;
            buffer.length = 0;
          }

          // ignore events that don't look like ID3 data
          if (buffer.length === 0 && (chunk.data.length < 10 || chunk.data[0] !== 'I'.charCodeAt(0) || chunk.data[1] !== 'D'.charCodeAt(0) || chunk.data[2] !== '3'.charCodeAt(0))) {
            if (settings.debug) {
              // eslint-disable-next-line no-console
              console.log('Skipping unrecognized metadata packet');
            }
            return;
          }

          // add this chunk to the data we've collected so far

          buffer.push(chunk);
          bufferSize += chunk.data.byteLength;

          // grab the size of the entire frame from the ID3 header
          if (buffer.length === 1) {
            // the frame size is transmitted as a 28-bit integer in the
            // last four bytes of the ID3 header.
            // The most significant bit of each byte is dropped and the
            // results concatenated to recover the actual value.
            tagSize = parseSyncSafeInteger(chunk.data.subarray(6, 10));

            // ID3 reports the tag size excluding the header but it's more
            // convenient for our comparisons to include it
            tagSize += 10;
          }

          // if the entire frame has not arrived, wait for more data
          if (bufferSize < tagSize) {
            return;
          }

          // collect the entire frame so it can be parsed
          tag = {
            data: new Uint8Array(tagSize),
            frames: [],
            pts: buffer[0].pts,
            dts: buffer[0].dts
          };
          for (i = 0; i < tagSize;) {
            tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);
            i += buffer[0].data.byteLength;
            bufferSize -= buffer[0].data.byteLength;
            buffer.shift();
          }

          // find the start of the first frame and the end of the tag
          frameStart = 10;
          if (tag.data[5] & 0x40) {
            // advance the frame start past the extended header
            frameStart += 4; // header size field
            frameStart += parseSyncSafeInteger(tag.data.subarray(10, 14));

            // clip any padding off the end
            tagSize -= parseSyncSafeInteger(tag.data.subarray(16, 20));
          }

          // parse one or more ID3 frames
          // http://id3.org/id3v2.3.0#ID3v2_frame_overview
          do {
            // determine the number of bytes in this frame
            frameSize = parseSyncSafeInteger(tag.data.subarray(frameStart + 4, frameStart + 8));
            if (frameSize < 1) {
              // eslint-disable-next-line no-console
              return console.log('Malformed ID3 frame encountered. Skipping metadata parsing.');
            }
            frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]);

            frame = {
              id: frameHeader,
              data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)
            };
            frame.key = frame.id;
            if (tagParsers[frame.id]) {
              tagParsers[frame.id](frame);

              // handle the special PRIV frame used to indicate the start
              // time for raw AAC data
              if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {
                var d = frame.data,
                  size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;

                size *= 4;
                size += d[7] & 0x03;
                frame.timeStamp = size;
                // in raw AAC, all subsequent data will be timestamped based
                // on the value of this frame
                // we couldn't have known the appropriate pts and dts before
                // parsing this ID3 tag so set those values now
                if (tag.pts === undefined && tag.dts === undefined) {
                  tag.pts = frame.timeStamp;
                  tag.dts = frame.timeStamp;
                }
                this.trigger('timestamp', frame);
              }
            }
            tag.frames.push(frame);

            frameStart += 10; // advance past the frame header
            frameStart += frameSize; // advance past the frame body
          } while (frameStart < tagSize);
          this.trigger('data', tag);
        };
      };
      _MetadataStream.prototype = new stream();

      var metadataStream = _MetadataStream;

      var TimestampRolloverStream$1 = timestampRolloverStream.TimestampRolloverStream;

      // object types
      var _TransportPacketStream, _TransportParseStream, _ElementaryStream;

      // constants
      var MP2T_PACKET_LENGTH = 188,

        // bytes
        SYNC_BYTE = 0x47;

      /**
       * Splits an incoming stream of binary data into MPEG-2 Transport
       * Stream packets.
       */
      _TransportPacketStream = function TransportPacketStream() {
        var buffer = new Uint8Array(MP2T_PACKET_LENGTH),
          bytesInBuffer = 0;

        _TransportPacketStream.prototype.init.call(this);

        // Deliver new bytes to the stream.

        this.push = function (bytes) {
          var startIndex = 0,
            endIndex = MP2T_PACKET_LENGTH,
            everything;

          // If there are bytes remaining from the last segment, prepend them to the
          // bytes that were pushed in
          if (bytesInBuffer) {
            everything = new Uint8Array(bytes.byteLength + bytesInBuffer);
            everything.set(buffer.subarray(0, bytesInBuffer));
            everything.set(bytes, bytesInBuffer);
            bytesInBuffer = 0;
          } else {
            everything = bytes;
          }

          // While we have enough data for a packet
          while (endIndex < everything.byteLength) {
            // Look for a pair of start and end sync bytes in the data..
            if (everything[startIndex] === SYNC_BYTE && everything[endIndex] === SYNC_BYTE) {
              // We found a packet so emit it and jump one whole packet forward in
              // the stream
              this.trigger('data', everything.subarray(startIndex, endIndex));
              startIndex += MP2T_PACKET_LENGTH;
              endIndex += MP2T_PACKET_LENGTH;
              continue;
            }
            // If we get here, we have somehow become de-synchronized and we need to step
            // forward one byte at a time until we find a pair of sync bytes that denote
            // a packet
            startIndex++;
            endIndex++;
          }

          // If there was some data left over at the end of the segment that couldn't
          // possibly be a whole packet, keep it because it might be the start of a packet
          // that continues in the next segment
          if (startIndex < everything.byteLength) {
            buffer.set(everything.subarray(startIndex), 0);
            bytesInBuffer = everything.byteLength - startIndex;
          }
        };

        this.flush = function () {
          // If the buffer contains a whole packet when we are being flushed, emit it
          // and empty the buffer. Otherwise hold onto the data because it may be
          // important for decoding the next segment
          if (bytesInBuffer === MP2T_PACKET_LENGTH && buffer[0] === SYNC_BYTE) {
            this.trigger('data', buffer);
            bytesInBuffer = 0;
          }
          this.trigger('done');
        };
      };
      _TransportPacketStream.prototype = new stream();

      /**
       * Accepts an MP2T TransportPacketStream and emits data events with parsed
       * forms of the individual transport stream packets.
       */
      _TransportParseStream = function TransportParseStream() {
        var parsePsi, parsePat, parsePmt, self;
        _TransportParseStream.prototype.init.call(this);
        self = this;

        this.packetsWaitingForPmt = [];
        this.programMapTable = undefined;

        parsePsi = function parsePsi(payload, psi) {
          var offset = 0;

          // PSI packets may be split into multiple sections and those
          // sections may be split into multiple packets. If a PSI
          // section starts in this packet, the payload_unit_start_indicator
          // will be true and the first byte of the payload will indicate
          // the offset from the current position to the start of the
          // section.
          if (psi.payloadUnitStartIndicator) {
            offset += payload[offset] + 1;
          }

          if (psi.type === 'pat') {
            parsePat(payload.subarray(offset), psi);
          } else {
            parsePmt(payload.subarray(offset), psi);
          }
        };

        parsePat = function parsePat(payload, pat) {
          pat.section_number = payload[7]; // eslint-disable-line camelcase
          pat.last_section_number = payload[8]; // eslint-disable-line camelcase

          // skip the PSI header and parse the first PMT entry
          self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11];
          pat.pmtPid = self.pmtPid;
        };

        /**
         * Parse out the relevant fields of a Program Map Table (PMT).
         * @param payload {Uint8Array} the PMT-specific portion of an MP2T
         * packet. The first byte in this array should be the table_id
         * field.
         * @param pmt {object} the object that should be decorated with
         * fields parsed from the PMT.
         */
        parsePmt = function parsePmt(payload, pmt) {
          var sectionLength, tableEnd, programInfoLength, offset;

          // PMTs can be sent ahead of the time when they should actually
          // take effect. We don't believe this should ever be the case
          // for HLS but we'll ignore "forward" PMT declarations if we see
          // them. Future PMT declarations have the current_next_indicator
          // set to zero.
          if (!(payload[5] & 0x01)) {
            return;
          }

          // overwrite any existing program map table
          self.programMapTable = {
            video: null,
            audio: null,
            'timed-metadata': {}
          };

          // the mapping table ends at the end of the current section
          sectionLength = (payload[1] & 0x0f) << 8 | payload[2];
          tableEnd = 3 + sectionLength - 4;

          // to determine where the table is, we have to figure out how
          // long the program info descriptors are
          programInfoLength = (payload[10] & 0x0f) << 8 | payload[11];

          // advance the offset to the first entry in the mapping table
          offset = 12 + programInfoLength;
          while (offset < tableEnd) {
            var streamType = payload[offset];
            var pid = (payload[offset + 1] & 0x1F) << 8 | payload[offset + 2];

            // only map a single elementary_pid for audio and video stream types
            // TODO: should this be done for metadata too? for now maintain behavior of
            //       multiple metadata streams
            if (streamType === streamTypes.H264_STREAM_TYPE && self.programMapTable.video === null) {
              self.programMapTable.video = pid;
            } else if (streamType === streamTypes.ADTS_STREAM_TYPE && self.programMapTable.audio === null) {
              self.programMapTable.audio = pid;
            } else if (streamType === streamTypes.METADATA_STREAM_TYPE) {
              // map pid to stream type for metadata streams
              self.programMapTable['timed-metadata'][pid] = streamType;
            }

            // move to the next table entry
            // skip past the elementary stream descriptors, if present
            offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5;
          }

          // record the map on the packet as well
          pmt.programMapTable = self.programMapTable;
        };

        /**
         * Deliver a new MP2T packet to the stream.
         */
        this.push = function (packet) {
          var result = {},
            offset = 4;

          result.payloadUnitStartIndicator = !!(packet[1] & 0x40);

          // pid is a 13-bit field starting at the last bit of packet[1]
          result.pid = packet[1] & 0x1f;
          result.pid <<= 8;
          result.pid |= packet[2];

          // if an adaption field is present, its length is specified by the
          // fifth byte of the TS packet header. The adaptation field is
          // used to add stuffing to PES packets that don't fill a complete
          // TS packet, and to specify some forms of timing and control data
          // that we do not currently use.
          if ((packet[3] & 0x30) >>> 4 > 0x01) {
            offset += packet[offset] + 1;
          }

          // parse the rest of the packet based on the type
          if (result.pid === 0) {
            result.type = 'pat';
            parsePsi(packet.subarray(offset), result);
            this.trigger('data', result);
          } else if (result.pid === this.pmtPid) {
            result.type = 'pmt';
            parsePsi(packet.subarray(offset), result);
            this.trigger('data', result);

            // if there are any packets waiting for a PMT to be found, process them now
            while (this.packetsWaitingForPmt.length) {
              this.processPes_.apply(this, this.packetsWaitingForPmt.shift());
            }
          } else if (this.programMapTable === undefined) {
            // When we have not seen a PMT yet, defer further processing of
            // PES packets until one has been parsed
            this.packetsWaitingForPmt.push([packet, offset, result]);
          } else {
            this.processPes_(packet, offset, result);
          }
        };

        this.processPes_ = function (packet, offset, result) {
          // set the appropriate stream type
          if (result.pid === this.programMapTable.video) {
            result.streamType = streamTypes.H264_STREAM_TYPE;
          } else if (result.pid === this.programMapTable.audio) {
            result.streamType = streamTypes.ADTS_STREAM_TYPE;
          } else {
            // if not video or audio, it is timed-metadata or unknown
            // if unknown, streamType will be undefined
            result.streamType = this.programMapTable['timed-metadata'][result.pid];
          }

          result.type = 'pes';
          result.data = packet.subarray(offset);

          this.trigger('data', result);
        };
      };
      _TransportParseStream.prototype = new stream();
      _TransportParseStream.STREAM_TYPES = {
        h264: 0x1b,
        adts: 0x0f
      };

      /**
       * Reconsistutes program elementary stream (PES) packets from parsed
       * transport stream packets. That is, if you pipe an
       * mp2t.TransportParseStream into a mp2t.ElementaryStream, the output
       * events will be events which capture the bytes for individual PES
       * packets plus relevant metadata that has been extracted from the
       * container.
       */
      _ElementaryStream = function ElementaryStream() {
        var self = this,


          // PES packet fragments
          video = {
            data: [],
            size: 0
          },
          audio = {
            data: [],
            size: 0
          },
          timedMetadata = {
            data: [],
            size: 0
          },
          parsePes = function parsePes(payload, pes) {
            var ptsDtsFlags;

            // get the packet length, this will be 0 for video
            pes.packetLength = 6 + (payload[4] << 8 | payload[5]);

            // find out if this packets starts a new keyframe
            pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0;
            // PES packets may be annotated with a PTS value, or a PTS value
            // and a DTS value. Determine what combination of values is
            // available to work with.
            ptsDtsFlags = payload[7];

            // PTS and DTS are normally stored as a 33-bit number.  Javascript
            // performs all bitwise operations on 32-bit integers but javascript
            // supports a much greater range (52-bits) of integer using standard
            // mathematical operations.
            // We construct a 31-bit value using bitwise operators over the 31
            // most significant bits and then multiply by 4 (equal to a left-shift
            // of 2) before we add the final 2 least significant bits of the
            // timestamp (equal to an OR.)
            if (ptsDtsFlags & 0xC0) {
              // the PTS and DTS are not written out directly. For information
              // on how they are encoded, see
              // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html
              pes.pts = (payload[9] & 0x0E) << 27 | (payload[10] & 0xFF) << 20 | (payload[11] & 0xFE) << 12 | (payload[12] & 0xFF) << 5 | (payload[13] & 0xFE) >>> 3;
              pes.pts *= 4; // Left shift by 2
              pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs
              pes.dts = pes.pts;
              if (ptsDtsFlags & 0x40) {
                pes.dts = (payload[14] & 0x0E) << 27 | (payload[15] & 0xFF) << 20 | (payload[16] & 0xFE) << 12 | (payload[17] & 0xFF) << 5 | (payload[18] & 0xFE) >>> 3;
                pes.dts *= 4; // Left shift by 2
                pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs
              }
            }
            // the data section starts immediately after the PES header.
            // pes_header_data_length specifies the number of header bytes
            // that follow the last byte of the field.
            pes.data = payload.subarray(9 + payload[8]);
          },
          flushStream = function flushStream(stream$$1, type, forceFlush) {
            var packetData = new Uint8Array(stream$$1.size),
              event = {
                type: type
              },
              i = 0,
              offset = 0,
              packetFlushable = false,
              fragment;

            // do nothing if there is not enough buffered data for a complete
            // PES header
            if (!stream$$1.data.length || stream$$1.size < 9) {
              return;
            }
            event.trackId = stream$$1.data[0].pid;

            // reassemble the packet
            for (i = 0; i < stream$$1.data.length; i++) {
              fragment = stream$$1.data[i];

              packetData.set(fragment.data, offset);
              offset += fragment.data.byteLength;
            }

            // parse assembled packet's PES header
            parsePes(packetData, event);

            // non-video PES packets MUST have a non-zero PES_packet_length
            // check that there is enough stream data to fill the packet
            packetFlushable = type === 'video' || event.packetLength <= stream$$1.size;

            // flush pending packets if the conditions are right
            if (forceFlush || packetFlushable) {
              stream$$1.size = 0;
              stream$$1.data.length = 0;
            }

            // only emit packets that are complete. this is to avoid assembling
            // incomplete PES packets due to poor segmentation
            if (packetFlushable) {
              self.trigger('data', event);
            }
          };

        _ElementaryStream.prototype.init.call(this);

        this.push = function (data) {
          ({
            pat: function pat() {
              // we have to wait for the PMT to arrive as well before we
              // have any meaningful metadata
            },
            pes: function pes() {
              var stream$$1, streamType;

              switch (data.streamType) {
                case streamTypes.H264_STREAM_TYPE:
                case streamTypes.H264_STREAM_TYPE:
                  stream$$1 = video;
                  streamType = 'video';
                  break;
                case streamTypes.ADTS_STREAM_TYPE:
                  stream$$1 = audio;
                  streamType = 'audio';
                  break;
                case streamTypes.METADATA_STREAM_TYPE:
                  stream$$1 = timedMetadata;
                  streamType = 'timed-metadata';
                  break;
                default:
                  // ignore unknown stream types
                  return;
              }

              // if a new packet is starting, we can flush the completed
              // packet
              if (data.payloadUnitStartIndicator) {
                flushStream(stream$$1, streamType, true);
              }

              // buffer this fragment until we are sure we've received the
              // complete payload
              stream$$1.data.push(data);
              stream$$1.size += data.data.byteLength;
            },
            pmt: function pmt() {
              var event = {
                  type: 'metadata',
                  tracks: []
                },
                programMapTable = data.programMapTable;

              // translate audio and video streams to tracks
              if (programMapTable.video !== null) {
                event.tracks.push({
                  timelineStartInfo: {
                    baseMediaDecodeTime: 0
                  },
                  id: +programMapTable.video,
                  codec: 'avc',
                  type: 'video'
                });
              }
              if (programMapTable.audio !== null) {
                event.tracks.push({
                  timelineStartInfo: {
                    baseMediaDecodeTime: 0
                  },
                  id: +programMapTable.audio,
                  codec: 'adts',
                  type: 'audio'
                });
              }

              self.trigger('data', event);
            }
          })[data.type]();
        };

        /**
         * Flush any remaining input. Video PES packets may be of variable
         * length. Normally, the start of a new video packet can trigger the
         * finalization of the previous packet. That is not possible if no
         * more video is forthcoming, however. In that case, some other
         * mechanism (like the end of the file) has to be employed. When it is
         * clear that no additional data is forthcoming, calling this method
         * will flush the buffered packets.
         */
        this.flush = function () {
          // !!THIS ORDER IS IMPORTANT!!
          // video first then audio
          flushStream(video, 'video');
          flushStream(audio, 'audio');
          flushStream(timedMetadata, 'timed-metadata');
          this.trigger('done');
        };
      };
      _ElementaryStream.prototype = new stream();

      var m2ts = {
        PAT_PID: 0x0000,
        MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH,
        TransportPacketStream: _TransportPacketStream,
        TransportParseStream: _TransportParseStream,
        ElementaryStream: _ElementaryStream,
        TimestampRolloverStream: TimestampRolloverStream$1,
        CaptionStream: captionStream.CaptionStream,
        Cea608Stream: captionStream.Cea608Stream,
        MetadataStream: metadataStream
      };

      for (var type in streamTypes) {
        if (streamTypes.hasOwnProperty(type)) {
          m2ts[type] = streamTypes[type];
        }
      }

      var m2ts_1 = m2ts;

      var _AdtsStream;

      var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];

      /*
       * Accepts a ElementaryStream and emits data events with parsed
       * AAC Audio Frames of the individual packets. Input audio in ADTS
       * format is unpacked and re-emitted as AAC frames.
       *
       * @see http://wiki.multimedia.cx/index.php?title=ADTS
       * @see http://wiki.multimedia.cx/?title=Understanding_AAC
       */
      _AdtsStream = function AdtsStream() {
        var buffer;

        _AdtsStream.prototype.init.call(this);

        this.push = function (packet) {
          var i = 0,
            frameNum = 0,
            frameLength,
            protectionSkipBytes,
            frameEnd,
            oldBuffer,
            sampleCount,
            adtsFrameDuration;

          if (packet.type !== 'audio') {
            // ignore non-audio data
            return;
          }

          // Prepend any data in the buffer to the input data so that we can parse
          // aac frames the cross a PES packet boundary
          if (buffer) {
            oldBuffer = buffer;
            buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);
            buffer.set(oldBuffer);
            buffer.set(packet.data, oldBuffer.byteLength);
          } else {
            buffer = packet.data;
          }

          // unpack any ADTS frames which have been fully received
          // for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS
          while (i + 5 < buffer.length) {

            // Loook for the start of an ADTS header..
            if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {
              // If a valid header was not found,  jump one forward and attempt to
              // find a valid ADTS header starting at the next byte
              i++;
              continue;
            }

            // The protection skip bit tells us if we have 2 bytes of CRC data at the
            // end of the ADTS header
            protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2;

            // Frame length is a 13 bit integer starting 16 bits from the
            // end of the sync sequence
            frameLength = (buffer[i + 3] & 0x03) << 11 | buffer[i + 4] << 3 | (buffer[i + 5] & 0xe0) >> 5;

            sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;
            adtsFrameDuration = sampleCount * 90000 / ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2];

            frameEnd = i + frameLength;

            // If we don't have enough data to actually finish this ADTS frame, return
            // and wait for more data
            if (buffer.byteLength < frameEnd) {
              return;
            }

            // Otherwise, deliver the complete AAC frame
            this.trigger('data', {
              pts: packet.pts + frameNum * adtsFrameDuration,
              dts: packet.dts + frameNum * adtsFrameDuration,
              sampleCount: sampleCount,
              audioobjecttype: (buffer[i + 2] >>> 6 & 0x03) + 1,
              channelcount: (buffer[i + 2] & 1) << 2 | (buffer[i + 3] & 0xc0) >>> 6,
              samplerate: ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2],
              samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,
              // assume ISO/IEC 14496-12 AudioSampleEntry default of 16
              samplesize: 16,
              data: buffer.subarray(i + 7 + protectionSkipBytes, frameEnd)
            });

            // If the buffer is empty, clear it and return
            if (buffer.byteLength === frameEnd) {
              buffer = undefined;
              return;
            }

            frameNum++;

            // Remove the finished frame from the buffer and start the process again
            buffer = buffer.subarray(frameEnd);
          }
        };
        this.flush = function () {
          this.trigger('done');
        };
      };

      _AdtsStream.prototype = new stream();

      var adts = _AdtsStream;

      var ExpGolomb;

      /**
       * Parser for exponential Golomb codes, a variable-bitwidth number encoding
       * scheme used by h264.
       */
      ExpGolomb = function ExpGolomb(workingData) {
        var
          // the number of bytes left to examine in workingData
          workingBytesAvailable = workingData.byteLength,


          // the current word being examined
          workingWord = 0,

          // :uint

          // the number of bits left to examine in the current word
          workingBitsAvailable = 0; // :uint;

        // ():uint
        this.length = function () {
          return 8 * workingBytesAvailable;
        };

        // ():uint
        this.bitsAvailable = function () {
          return 8 * workingBytesAvailable + workingBitsAvailable;
        };

        // ():void
        this.loadWord = function () {
          var position = workingData.byteLength - workingBytesAvailable,
            workingBytes = new Uint8Array(4),
            availableBytes = Math.min(4, workingBytesAvailable);

          if (availableBytes === 0) {
            throw new Error('no bytes available');
          }

          workingBytes.set(workingData.subarray(position, position + availableBytes));
          workingWord = new DataView(workingBytes.buffer).getUint32(0);

          // track the amount of workingData that has been processed
          workingBitsAvailable = availableBytes * 8;
          workingBytesAvailable -= availableBytes;
        };

        // (count:int):void
        this.skipBits = function (count) {
          var skipBytes; // :int
          if (workingBitsAvailable > count) {
            workingWord <<= count;
            workingBitsAvailable -= count;
          } else {
            count -= workingBitsAvailable;
            skipBytes = Math.floor(count / 8);

            count -= skipBytes * 8;
            workingBytesAvailable -= skipBytes;

            this.loadWord();

            workingWord <<= count;
            workingBitsAvailable -= count;
          }
        };

        // (size:int):uint
        this.readBits = function (size) {
          var bits = Math.min(workingBitsAvailable, size),

            // :uint
            valu = workingWord >>> 32 - bits; // :uint
          // if size > 31, handle error
          workingBitsAvailable -= bits;
          if (workingBitsAvailable > 0) {
            workingWord <<= bits;
          } else if (workingBytesAvailable > 0) {
            this.loadWord();
          }

          bits = size - bits;
          if (bits > 0) {
            return valu << bits | this.readBits(bits);
          }
          return valu;
        };

        // ():uint
        this.skipLeadingZeros = function () {
          var leadingZeroCount; // :uint
          for (leadingZeroCount = 0; leadingZeroCount < workingBitsAvailable; ++leadingZeroCount) {
            if ((workingWord & 0x80000000 >>> leadingZeroCount) !== 0) {
              // the first bit of working word is 1
              workingWord <<= leadingZeroCount;
              workingBitsAvailable -= leadingZeroCount;
              return leadingZeroCount;
            }
          }

          // we exhausted workingWord and still have not found a 1
          this.loadWord();
          return leadingZeroCount + this.skipLeadingZeros();
        };

        // ():void
        this.skipUnsignedExpGolomb = function () {
          this.skipBits(1 + this.skipLeadingZeros());
        };

        // ():void
        this.skipExpGolomb = function () {
          this.skipBits(1 + this.skipLeadingZeros());
        };

        // ():uint
        this.readUnsignedExpGolomb = function () {
          var clz = this.skipLeadingZeros(); // :uint
          return this.readBits(clz + 1) - 1;
        };

        // ():int
        this.readExpGolomb = function () {
          var valu = this.readUnsignedExpGolomb(); // :int
          if (0x01 & valu) {
            // the number is odd if the low order bit is set
            return 1 + valu >>> 1; // add 1 to make it even, and divide by 2
          }
          return -1 * (valu >>> 1); // divide by two then make it negative
        };

        // Some convenience functions
        // :Boolean
        this.readBoolean = function () {
          return this.readBits(1) === 1;
        };

        // ():int
        this.readUnsignedByte = function () {
          return this.readBits(8);
        };

        this.loadWord();
      };

      var expGolomb = ExpGolomb;

      var _H264Stream, _NalByteStream;
      var PROFILES_WITH_OPTIONAL_SPS_DATA;

      /**
       * Accepts a NAL unit byte stream and unpacks the embedded NAL units.
       */
      _NalByteStream = function NalByteStream() {
        var syncPoint = 0,
          i,
          buffer;
        _NalByteStream.prototype.init.call(this);

        this.push = function (data) {
          var swapBuffer;

          if (!buffer) {
            buffer = data.data;
          } else {
            swapBuffer = new Uint8Array(buffer.byteLength + data.data.byteLength);
            swapBuffer.set(buffer);
            swapBuffer.set(data.data, buffer.byteLength);
            buffer = swapBuffer;
          }

          // Rec. ITU-T H.264, Annex B
          // scan for NAL unit boundaries

          // a match looks like this:
          // 0 0 1 .. NAL .. 0 0 1
          // ^ sync point        ^ i
          // or this:
          // 0 0 1 .. NAL .. 0 0 0
          // ^ sync point        ^ i

          // advance the sync point to a NAL start, if necessary
          for (; syncPoint < buffer.byteLength - 3; syncPoint++) {
            if (buffer[syncPoint + 2] === 1) {
              // the sync point is properly aligned
              i = syncPoint + 5;
              break;
            }
          }

          while (i < buffer.byteLength) {
            // look at the current byte to determine if we've hit the end of
            // a NAL unit boundary
            switch (buffer[i]) {
              case 0:
                // skip past non-sync sequences
                if (buffer[i - 1] !== 0) {
                  i += 2;
                  break;
                } else if (buffer[i - 2] !== 0) {
                  i++;
                  break;
                }

                // deliver the NAL unit if it isn't empty
                if (syncPoint + 3 !== i - 2) {
                  this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));
                }

                // drop trailing zeroes
                do {
                  i++;
                } while (buffer[i] !== 1 && i < buffer.length);
                syncPoint = i - 2;
                i += 3;
                break;
              case 1:
                // skip past non-sync sequences
                if (buffer[i - 1] !== 0 || buffer[i - 2] !== 0) {
                  i += 3;
                  break;
                }

                // deliver the NAL unit
                this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));
                syncPoint = i - 2;
                i += 3;
                break;
              default:
                // the current byte isn't a one or zero, so it cannot be part
                // of a sync sequence
                i += 3;
                break;
            }
          }
          // filter out the NAL units that were delivered
          buffer = buffer.subarray(syncPoint);
          i -= syncPoint;
          syncPoint = 0;
        };

        this.flush = function () {
          // deliver the last buffered NAL unit
          if (buffer && buffer.byteLength > 3) {
            this.trigger('data', buffer.subarray(syncPoint + 3));
          }
          // reset the stream state
          buffer = null;
          syncPoint = 0;
          this.trigger('done');
        };
      };
      _NalByteStream.prototype = new stream();

      // values of profile_idc that indicate additional fields are included in the SPS
      // see Recommendation ITU-T H.264 (4/2013),
      // 7.3.2.1.1 Sequence parameter set data syntax
      PROFILES_WITH_OPTIONAL_SPS_DATA = {
        100: true,
        110: true,
        122: true,
        244: true,
        44: true,
        83: true,
        86: true,
        118: true,
        128: true,
        138: true,
        139: true,
        134: true
      };

      /**
       * Accepts input from a ElementaryStream and produces H.264 NAL unit data
       * events.
       */
      _H264Stream = function H264Stream() {
        var nalByteStream = new _NalByteStream(),
          self,
          trackId,
          currentPts,
          currentDts,
          discardEmulationPreventionBytes,
          readSequenceParameterSet,
          skipScalingList;

        _H264Stream.prototype.init.call(this);
        self = this;

        this.push = function (packet) {
          if (packet.type !== 'video') {
            return;
          }
          trackId = packet.trackId;
          currentPts = packet.pts;
          currentDts = packet.dts;

          nalByteStream.push(packet);
        };

        nalByteStream.on('data', function (data) {
          var event = {
            trackId: trackId,
            pts: currentPts,
            dts: currentDts,
            data: data
          };

          switch (data[0] & 0x1f) {
            case 0x05:
              event.nalUnitType = 'slice_layer_without_partitioning_rbsp_idr';
              break;
            case 0x06:
              event.nalUnitType = 'sei_rbsp';
              event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));
              break;
            case 0x07:
              event.nalUnitType = 'seq_parameter_set_rbsp';
              event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));
              event.config = readSequenceParameterSet(event.escapedRBSP);
              break;
            case 0x08:
              event.nalUnitType = 'pic_parameter_set_rbsp';
              break;
            case 0x09:
              event.nalUnitType = 'access_unit_delimiter_rbsp';
              break;

            default:
              break;
          }
          self.trigger('data', event);
        });
        nalByteStream.on('done', function () {
          self.trigger('done');
        });

        this.flush = function () {
          nalByteStream.flush();
        };

        /**
         * Advance the ExpGolomb decoder past a scaling list. The scaling
         * list is optionally transmitted as part of a sequence parameter
         * set and is not relevant to transmuxing.
         * @param count {number} the number of entries in this scaling list
         * @param expGolombDecoder {object} an ExpGolomb pointed to the
         * start of a scaling list
         * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1
         */
        skipScalingList = function skipScalingList(count, expGolombDecoder) {
          var lastScale = 8,
            nextScale = 8,
            j,
            deltaScale;

          for (j = 0; j < count; j++) {
            if (nextScale !== 0) {
              deltaScale = expGolombDecoder.readExpGolomb();
              nextScale = (lastScale + deltaScale + 256) % 256;
            }

            lastScale = nextScale === 0 ? lastScale : nextScale;
          }
        };

        /**
         * Expunge any "Emulation Prevention" bytes from a "Raw Byte
         * Sequence Payload"
         * @param data {Uint8Array} the bytes of a RBSP from a NAL
         * unit
         * @return {Uint8Array} the RBSP without any Emulation
         * Prevention Bytes
         */
        discardEmulationPreventionBytes = function discardEmulationPreventionBytes(data) {
          var length = data.byteLength,
            emulationPreventionBytesPositions = [],
            i = 1,
            newLength,
            newData;

          // Find all `Emulation Prevention Bytes`
          while (i < length - 2) {
            if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {
              emulationPreventionBytesPositions.push(i + 2);
              i += 2;
            } else {
              i++;
            }
          }

          // If no Emulation Prevention Bytes were found just return the original
          // array
          if (emulationPreventionBytesPositions.length === 0) {
            return data;
          }

          // Create a new array to hold the NAL unit data
          newLength = length - emulationPreventionBytesPositions.length;
          newData = new Uint8Array(newLength);
          var sourceIndex = 0;

          for (i = 0; i < newLength; sourceIndex++, i++) {
            if (sourceIndex === emulationPreventionBytesPositions[0]) {
              // Skip this byte
              sourceIndex++;
              // Remove this position index
              emulationPreventionBytesPositions.shift();
            }
            newData[i] = data[sourceIndex];
          }

          return newData;
        };

        /**
         * Read a sequence parameter set and return some interesting video
         * properties. A sequence parameter set is the H264 metadata that
         * describes the properties of upcoming video frames.
         * @param data {Uint8Array} the bytes of a sequence parameter set
         * @return {object} an object with configuration parsed from the
         * sequence parameter set, including the dimensions of the
         * associated video frames.
         */
        readSequenceParameterSet = function readSequenceParameterSet(data) {
          var frameCropLeftOffset = 0,
            frameCropRightOffset = 0,
            frameCropTopOffset = 0,
            frameCropBottomOffset = 0,
            sarScale = 1,
            expGolombDecoder,
            profileIdc,
            levelIdc,
            profileCompatibility,
            chromaFormatIdc,
            picOrderCntType,
            numRefFramesInPicOrderCntCycle,
            picWidthInMbsMinus1,
            picHeightInMapUnitsMinus1,
            frameMbsOnlyFlag,
            scalingListCount,
            sarRatio,
            aspectRatioIdc,
            i;

          expGolombDecoder = new expGolomb(data);
          profileIdc = expGolombDecoder.readUnsignedByte(); // profile_idc
          profileCompatibility = expGolombDecoder.readUnsignedByte(); // constraint_set[0-5]_flag
          levelIdc = expGolombDecoder.readUnsignedByte(); // level_idc u(8)
          expGolombDecoder.skipUnsignedExpGolomb(); // seq_parameter_set_id

          // some profiles have more optional data we don't need
          if (PROFILES_WITH_OPTIONAL_SPS_DATA[profileIdc]) {
            chromaFormatIdc = expGolombDecoder.readUnsignedExpGolomb();
            if (chromaFormatIdc === 3) {
              expGolombDecoder.skipBits(1); // separate_colour_plane_flag
            }
            expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_luma_minus8
            expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_chroma_minus8
            expGolombDecoder.skipBits(1); // qpprime_y_zero_transform_bypass_flag
            if (expGolombDecoder.readBoolean()) {
              // seq_scaling_matrix_present_flag
              scalingListCount = chromaFormatIdc !== 3 ? 8 : 12;
              for (i = 0; i < scalingListCount; i++) {
                if (expGolombDecoder.readBoolean()) {
                  // seq_scaling_list_present_flag[ i ]
                  if (i < 6) {
                    skipScalingList(16, expGolombDecoder);
                  } else {
                    skipScalingList(64, expGolombDecoder);
                  }
                }
              }
            }
          }

          expGolombDecoder.skipUnsignedExpGolomb(); // log2_max_frame_num_minus4
          picOrderCntType = expGolombDecoder.readUnsignedExpGolomb();

          if (picOrderCntType === 0) {
            expGolombDecoder.readUnsignedExpGolomb(); // log2_max_pic_order_cnt_lsb_minus4
          } else if (picOrderCntType === 1) {
            expGolombDecoder.skipBits(1); // delta_pic_order_always_zero_flag
            expGolombDecoder.skipExpGolomb(); // offset_for_non_ref_pic
            expGolombDecoder.skipExpGolomb(); // offset_for_top_to_bottom_field
            numRefFramesInPicOrderCntCycle = expGolombDecoder.readUnsignedExpGolomb();
            for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {
              expGolombDecoder.skipExpGolomb(); // offset_for_ref_frame[ i ]
            }
          }

          expGolombDecoder.skipUnsignedExpGolomb(); // max_num_ref_frames
          expGolombDecoder.skipBits(1); // gaps_in_frame_num_value_allowed_flag

          picWidthInMbsMinus1 = expGolombDecoder.readUnsignedExpGolomb();
          picHeightInMapUnitsMinus1 = expGolombDecoder.readUnsignedExpGolomb();

          frameMbsOnlyFlag = expGolombDecoder.readBits(1);
          if (frameMbsOnlyFlag === 0) {
            expGolombDecoder.skipBits(1); // mb_adaptive_frame_field_flag
          }

          expGolombDecoder.skipBits(1); // direct_8x8_inference_flag
          if (expGolombDecoder.readBoolean()) {
            // frame_cropping_flag
            frameCropLeftOffset = expGolombDecoder.readUnsignedExpGolomb();
            frameCropRightOffset = expGolombDecoder.readUnsignedExpGolomb();
            frameCropTopOffset = expGolombDecoder.readUnsignedExpGolomb();
            frameCropBottomOffset = expGolombDecoder.readUnsignedExpGolomb();
          }
          if (expGolombDecoder.readBoolean()) {
            // vui_parameters_present_flag
            if (expGolombDecoder.readBoolean()) {
              // aspect_ratio_info_present_flag
              aspectRatioIdc = expGolombDecoder.readUnsignedByte();
              switch (aspectRatioIdc) {
                case 1:
                  sarRatio = [1, 1];
                  break;
                case 2:
                  sarRatio = [12, 11];
                  break;
                case 3:
                  sarRatio = [10, 11];
                  break;
                case 4:
                  sarRatio = [16, 11];
                  break;
                case 5:
                  sarRatio = [40, 33];
                  break;
                case 6:
                  sarRatio = [24, 11];
                  break;
                case 7:
                  sarRatio = [20, 11];
                  break;
                case 8:
                  sarRatio = [32, 11];
                  break;
                case 9:
                  sarRatio = [80, 33];
                  break;
                case 10:
                  sarRatio = [18, 11];
                  break;
                case 11:
                  sarRatio = [15, 11];
                  break;
                case 12:
                  sarRatio = [64, 33];
                  break;
                case 13:
                  sarRatio = [160, 99];
                  break;
                case 14:
                  sarRatio = [4, 3];
                  break;
                case 15:
                  sarRatio = [3, 2];
                  break;
                case 16:
                  sarRatio = [2, 1];
                  break;
                case 255: {
                  sarRatio = [expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte(), expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte()];
                  break;
                }
              }
              if (sarRatio) {
                sarScale = sarRatio[0] / sarRatio[1];
              }
            }
          }
          return {
            profileIdc: profileIdc,
            levelIdc: levelIdc,
            profileCompatibility: profileCompatibility,
            width: Math.ceil(((picWidthInMbsMinus1 + 1) * 16 - frameCropLeftOffset * 2 - frameCropRightOffset * 2) * sarScale),
            height: (2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16 - frameCropTopOffset * 2 - frameCropBottomOffset * 2
          };
        };
      };
      _H264Stream.prototype = new stream();

      var h264 = {
        H264Stream: _H264Stream,
        NalByteStream: _NalByteStream
      };

      // Constants
      var _AacStream;

      /**
       * Splits an incoming stream of binary data into ADTS and ID3 Frames.
       */

      _AacStream = function AacStream() {
        var everything = new Uint8Array(),
          timeStamp = 0;

        _AacStream.prototype.init.call(this);

        this.setTimestamp = function (timestamp) {
          timeStamp = timestamp;
        };

        this.parseId3TagSize = function (header, byteIndex) {
          var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],
            flags = header[byteIndex + 5],
            footerPresent = (flags & 16) >> 4;

          if (footerPresent) {
            return returnSize + 20;
          }
          return returnSize + 10;
        };

        this.parseAdtsSize = function (header, byteIndex) {
          var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,
            middle = header[byteIndex + 4] << 3,
            highTwo = header[byteIndex + 3] & 0x3 << 11;

          return highTwo | middle | lowThree;
        };

        this.push = function (bytes) {
          var frameSize = 0,
            byteIndex = 0,
            bytesLeft,
            chunk,
            packet,
            tempLength;

          // If there are bytes remaining from the last segment, prepend them to the
          // bytes that were pushed in
          if (everything.length) {
            tempLength = everything.length;
            everything = new Uint8Array(bytes.byteLength + tempLength);
            everything.set(everything.subarray(0, tempLength));
            everything.set(bytes, tempLength);
          } else {
            everything = bytes;
          }

          while (everything.length - byteIndex >= 3) {
            if (everything[byteIndex] === 'I'.charCodeAt(0) && everything[byteIndex + 1] === 'D'.charCodeAt(0) && everything[byteIndex + 2] === '3'.charCodeAt(0)) {

              // Exit early because we don't have enough to parse
              // the ID3 tag header
              if (everything.length - byteIndex < 10) {
                break;
              }

              // check framesize
              frameSize = this.parseId3TagSize(everything, byteIndex);

              // Exit early if we don't have enough in the buffer
              // to emit a full packet
              if (frameSize > everything.length) {
                break;
              }
              chunk = {
                type: 'timed-metadata',
                data: everything.subarray(byteIndex, byteIndex + frameSize)
              };
              this.trigger('data', chunk);
              byteIndex += frameSize;
              continue;
            } else if (everything[byteIndex] & 0xff === 0xff && (everything[byteIndex + 1] & 0xf0) === 0xf0) {

              // Exit early because we don't have enough to parse
              // the ADTS frame header
              if (everything.length - byteIndex < 7) {
                break;
              }

              frameSize = this.parseAdtsSize(everything, byteIndex);

              // Exit early if we don't have enough in the buffer
              // to emit a full packet
              if (frameSize > everything.length) {
                break;
              }

              packet = {
                type: 'audio',
                data: everything.subarray(byteIndex, byteIndex + frameSize),
                pts: timeStamp,
                dts: timeStamp
              };
              this.trigger('data', packet);
              byteIndex += frameSize;
              continue;
            }
            byteIndex++;
          }
          bytesLeft = everything.length - byteIndex;

          if (bytesLeft > 0) {
            everything = everything.subarray(byteIndex);
          } else {
            everything = new Uint8Array();
          }
        };
      };

      _AacStream.prototype = new stream();

      var aac = _AacStream;

      var highPrefix = [33, 16, 5, 32, 164, 27];
      var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];
      var zeroFill = function zeroFill(count) {
        var a = [];
        while (count--) {
          a.push(0);
        }
        return a;
      };

      var makeTable = function makeTable(metaTable) {
        return Object.keys(metaTable).reduce(function (obj, key) {
          obj[key] = new Uint8Array(metaTable[key].reduce(function (arr, part) {
            return arr.concat(part);
          }, []));
          return obj;
        }, {});
      };

      // Frames-of-silence to use for filling in missing AAC frames
      var coneOfSilence = {
        96000: [highPrefix, [227, 64], zeroFill(154), [56]],
        88200: [highPrefix, [231], zeroFill(170), [56]],
        64000: [highPrefix, [248, 192], zeroFill(240), [56]],
        48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],
        44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],
        32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],
        24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],
        16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],
        12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],
        11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],
        8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]
      };

      var silence = makeTable(coneOfSilence);

      var ONE_SECOND_IN_TS = 90000,

        // 90kHz clock
        secondsToVideoTs,
        secondsToAudioTs,
        videoTsToSeconds,
        audioTsToSeconds,
        audioTsToVideoTs,
        videoTsToAudioTs;

      secondsToVideoTs = function secondsToVideoTs(seconds) {
        return seconds * ONE_SECOND_IN_TS;
      };

      secondsToAudioTs = function secondsToAudioTs(seconds, sampleRate) {
        return seconds * sampleRate;
      };

      videoTsToSeconds = function videoTsToSeconds(timestamp) {
        return timestamp / ONE_SECOND_IN_TS;
      };

      audioTsToSeconds = function audioTsToSeconds(timestamp, sampleRate) {
        return timestamp / sampleRate;
      };

      audioTsToVideoTs = function audioTsToVideoTs(timestamp, sampleRate) {
        return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));
      };

      videoTsToAudioTs = function videoTsToAudioTs(timestamp, sampleRate) {
        return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);
      };

      var clock = {
        secondsToVideoTs: secondsToVideoTs,
        secondsToAudioTs: secondsToAudioTs,
        videoTsToSeconds: videoTsToSeconds,
        audioTsToSeconds: audioTsToSeconds,
        audioTsToVideoTs: audioTsToVideoTs,
        videoTsToAudioTs: videoTsToAudioTs
      };

      var H264Stream = h264.H264Stream;

      // constants
      var AUDIO_PROPERTIES = ['audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize'];

      var VIDEO_PROPERTIES = ['width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility'];

      var ONE_SECOND_IN_TS$1 = 90000; // 90kHz clock

      // object types
      var _VideoSegmentStream, _AudioSegmentStream, _Transmuxer, _CoalesceStream;

      // Helper functions
      var createDefaultSample, isLikelyAacData, collectDtsInfo, clearDtsInfo, calculateTrackBaseMediaDecodeTime,
        arrayEquals, sumFrameByteLengths;

      /**
       * Default sample object
       * see ISO/IEC 14496-12:2012, section 8.6.4.3
       */
      createDefaultSample = function createDefaultSample() {
        return {
          size: 0,
          flags: {
            isLeading: 0,
            dependsOn: 1,
            isDependedOn: 0,
            hasRedundancy: 0,
            degradationPriority: 0
          }
        };
      };

      isLikelyAacData = function isLikelyAacData(data) {
        if (data[0] === 'I'.charCodeAt(0) && data[1] === 'D'.charCodeAt(0) && data[2] === '3'.charCodeAt(0)) {
          return true;
        }
        return false;
      };

      /**
       * Compare two arrays (even typed) for same-ness
       */
      arrayEquals = function arrayEquals(a, b) {
        var i;

        if (a.length !== b.length) {
          return false;
        }

        // compare the value of each element in the array
        for (i = 0; i < a.length; i++) {
          if (a[i] !== b[i]) {
            return false;
          }
        }

        return true;
      };

      /**
       * Sum the `byteLength` properties of the data in each AAC frame
       */
      sumFrameByteLengths = function sumFrameByteLengths(array) {
        var i,
          currentObj,
          sum = 0;

        // sum the byteLength's all each nal unit in the frame
        for (i = 0; i < array.length; i++) {
          currentObj = array[i];
          sum += currentObj.data.byteLength;
        }

        return sum;
      };

      /**
       * Constructs a single-track, ISO BMFF media segment from AAC data
       * events. The output of this stream can be fed to a SourceBuffer
       * configured with a suitable initialization segment.
       * @param track {object} track metadata configuration
       * @param options {object} transmuxer options object
       * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps
       *        in the source; false to adjust the first segment to start at 0.
       */
      _AudioSegmentStream = function AudioSegmentStream(track, options) {
        var adtsFrames = [],
          sequenceNumber = 0,
          earliestAllowedDts = 0,
          audioAppendStartTs = 0,
          videoBaseMediaDecodeTime = Infinity;

        options = options || {};

        _AudioSegmentStream.prototype.init.call(this);

        this.push = function (data) {
          collectDtsInfo(track, data);

          if (track) {
            AUDIO_PROPERTIES.forEach(function (prop) {
              track[prop] = data[prop];
            });
          }

          // buffer audio data until end() is called
          adtsFrames.push(data);
        };

        this.setEarliestDts = function (earliestDts) {
          earliestAllowedDts = earliestDts - track.timelineStartInfo.baseMediaDecodeTime;
        };

        this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {
          videoBaseMediaDecodeTime = baseMediaDecodeTime;
        };

        this.setAudioAppendStart = function (timestamp) {
          audioAppendStartTs = timestamp;
        };

        this.flush = function () {
          var frames, moof, mdat, boxes;

          // return early if no audio data has been observed
          if (adtsFrames.length === 0) {
            this.trigger('done', 'AudioSegmentStream');
            return;
          }

          frames = this.trimAdtsFramesByEarliestDts_(adtsFrames);
          track.baseMediaDecodeTime = calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);

          this.prefixWithSilence_(track, frames);

          // we have to build the index from byte locations to
          // samples (that is, adts frames) in the audio data
          track.samples = this.generateSampleTable_(frames);

          // concatenate the audio data to constuct the mdat
          mdat = mp4Generator.mdat(this.concatenateFrameData_(frames));

          adtsFrames = [];

          moof = mp4Generator.moof(sequenceNumber, [track]);
          boxes = new Uint8Array(moof.byteLength + mdat.byteLength);

          // bump the sequence number for next time
          sequenceNumber++;

          boxes.set(moof);
          boxes.set(mdat, moof.byteLength);

          clearDtsInfo(track);

          this.trigger('data', {track: track, boxes: boxes});
          this.trigger('done', 'AudioSegmentStream');
        };

        // Possibly pad (prefix) the audio track with silence if appending this track
        // would lead to the introduction of a gap in the audio buffer
        this.prefixWithSilence_ = function (track, frames) {
          var baseMediaDecodeTimeTs,
            frameDuration = 0,
            audioGapDuration = 0,
            audioFillFrameCount = 0,
            audioFillDuration = 0,
            silentFrame,
            i;

          if (!frames.length) {
            return;
          }

          baseMediaDecodeTimeTs = clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate);
          // determine frame clock duration based on sample rate, round up to avoid overfills
          frameDuration = Math.ceil(ONE_SECOND_IN_TS$1 / (track.samplerate / 1024));

          if (audioAppendStartTs && videoBaseMediaDecodeTime) {
            // insert the shortest possible amount (audio gap or audio to video gap)
            audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime);
            // number of full frames in the audio gap
            audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);
            audioFillDuration = audioFillFrameCount * frameDuration;
          }

          // don't attempt to fill gaps smaller than a single frame or larger
          // than a half second
          if (audioFillFrameCount < 1 || audioFillDuration > ONE_SECOND_IN_TS$1 / 2) {
            return;
          }

          silentFrame = silence[track.samplerate];

          if (!silentFrame) {
            // we don't have a silent frame pregenerated for the sample rate, so use a frame
            // from the content instead
            silentFrame = frames[0].data;
          }

          for (i = 0; i < audioFillFrameCount; i++) {
            frames.splice(i, 0, {
              data: silentFrame
            });
          }

          track.baseMediaDecodeTime -= Math.floor(clock.videoTsToAudioTs(audioFillDuration, track.samplerate));
        };

        // If the audio segment extends before the earliest allowed dts
        // value, remove AAC frames until starts at or after the earliest
        // allowed DTS so that we don't end up with a negative baseMedia-
        // DecodeTime for the audio track
        this.trimAdtsFramesByEarliestDts_ = function (adtsFrames) {
          if (track.minSegmentDts >= earliestAllowedDts) {
            return adtsFrames;
          }

          // We will need to recalculate the earliest segment Dts
          track.minSegmentDts = Infinity;

          return adtsFrames.filter(function (currentFrame) {
            // If this is an allowed frame, keep it and record it's Dts
            if (currentFrame.dts >= earliestAllowedDts) {
              track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);
              track.minSegmentPts = track.minSegmentDts;
              return true;
            }
            // Otherwise, discard it
            return false;
          });
        };

        // generate the track's raw mdat data from an array of frames
        this.generateSampleTable_ = function (frames) {
          var i,
            currentFrame,
            samples = [];

          for (i = 0; i < frames.length; i++) {
            currentFrame = frames[i];
            samples.push({
              size: currentFrame.data.byteLength,
              duration: 1024 // For AAC audio, all samples contain 1024 samples
            });
          }
          return samples;
        };

        // generate the track's sample table from an array of frames
        this.concatenateFrameData_ = function (frames) {
          var i,
            currentFrame,
            dataOffset = 0,
            data = new Uint8Array(sumFrameByteLengths(frames));

          for (i = 0; i < frames.length; i++) {
            currentFrame = frames[i];

            data.set(currentFrame.data, dataOffset);
            dataOffset += currentFrame.data.byteLength;
          }
          return data;
        };
      };

      _AudioSegmentStream.prototype = new stream();

      /**
       * Constructs a single-track, ISO BMFF media segment from H264 data
       * events. The output of this stream can be fed to a SourceBuffer
       * configured with a suitable initialization segment.
       * @param track {object} track metadata configuration
       * @param options {object} transmuxer options object
       * @param options.alignGopsAtEnd {boolean} If true, start from the end of the
       *        gopsToAlignWith list when attempting to align gop pts
       * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps
       *        in the source; false to adjust the first segment to start at 0.
       */
      _VideoSegmentStream = function VideoSegmentStream(track, options) {
        var sequenceNumber = 0,
          nalUnits = [],
          gopsToAlignWith = [],
          config,
          pps;

        options = options || {};

        _VideoSegmentStream.prototype.init.call(this);

        delete track.minPTS;

        this.gopCache_ = [];

        this.push = function (nalUnit) {
          collectDtsInfo(track, nalUnit);

          // record the track config
          if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {
            config = nalUnit.config;
            track.sps = [nalUnit.data];

            VIDEO_PROPERTIES.forEach(function (prop) {
              track[prop] = config[prop];
            }, this);
          }

          if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) {
            pps = nalUnit.data;
            track.pps = [nalUnit.data];
          }

          // buffer video until flush() is called
          nalUnits.push(nalUnit);
        };

        this.flush = function () {
          var frames, gopForFusion, gops, moof, mdat, boxes;

          // Throw away nalUnits at the start of the byte stream until
          // we find the first AUD
          while (nalUnits.length) {
            if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {
              break;
            }
            nalUnits.shift();
          }

          // Return early if no video data has been observed
          if (nalUnits.length === 0) {
            this.resetStream_();
            this.trigger('done', 'VideoSegmentStream');
            return;
          }

          // Organize the raw nal-units into arrays that represent
          // higher-level constructs such as frames and gops
          // (group-of-pictures)
          frames = this.groupNalsIntoFrames_(nalUnits);
          gops = this.groupFramesIntoGops_(frames);

          // If the first frame of this fragment is not a keyframe we have
          // a problem since MSE (on Chrome) requires a leading keyframe.
          //
          // We have two approaches to repairing this situation:
          // 1) GOP-FUSION:
          //    This is where we keep track of the GOPS (group-of-pictures)
          //    from previous fragments and attempt to find one that we can
          //    prepend to the current fragment in order to create a valid
          //    fragment.
          // 2) KEYFRAME-PULLING:
          //    Here we search for the first keyframe in the fragment and
          //    throw away all the frames between the start of the fragment
          //    and that keyframe. We then extend the duration and pull the
          //    PTS of the keyframe forward so that it covers the time range
          //    of the frames that were disposed of.
          //
          // #1 is far prefereable over #2 which can cause "stuttering" but
          // requires more things to be just right.
          if (!gops[0][0].keyFrame) {
            // Search for a gop for fusion from our gopCache
            gopForFusion = this.getGopForFusion_(nalUnits[0], track);

            if (gopForFusion) {
              gops.unshift(gopForFusion);
              // Adjust Gops' metadata to account for the inclusion of the
              // new gop at the beginning
              gops.byteLength += gopForFusion.byteLength;
              gops.nalCount += gopForFusion.nalCount;
              gops.pts = gopForFusion.pts;
              gops.dts = gopForFusion.dts;
              gops.duration += gopForFusion.duration;
            } else {
              // If we didn't find a candidate gop fall back to keyframe-pulling
              gops = this.extendFirstKeyFrame_(gops);
            }
          }

          // Trim gops to align with gopsToAlignWith
          if (gopsToAlignWith.length) {
            var alignedGops;

            if (options.alignGopsAtEnd) {
              alignedGops = this.alignGopsAtEnd_(gops);
            } else {
              alignedGops = this.alignGopsAtStart_(gops);
            }

            if (!alignedGops) {
              // save all the nals in the last GOP into the gop cache
              this.gopCache_.unshift({
                gop: gops.pop(),
                pps: track.pps,
                sps: track.sps
              });

              // Keep a maximum of 6 GOPs in the cache
              this.gopCache_.length = Math.min(6, this.gopCache_.length);

              // Clear nalUnits
              nalUnits = [];

              // return early no gops can be aligned with desired gopsToAlignWith
              this.resetStream_();
              this.trigger('done', 'VideoSegmentStream');
              return;
            }

            // Some gops were trimmed. clear dts info so minSegmentDts and pts are correct
            // when recalculated before sending off to CoalesceStream
            clearDtsInfo(track);

            gops = alignedGops;
          }

          collectDtsInfo(track, gops);

          // First, we have to build the index from byte locations to
          // samples (that is, frames) in the video data
          track.samples = this.generateSampleTable_(gops);

          // Concatenate the video data and construct the mdat
          mdat = mp4Generator.mdat(this.concatenateNalData_(gops));

          track.baseMediaDecodeTime = calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);

          this.trigger('processedGopsInfo', gops.map(function (gop) {
            return {
              pts: gop.pts,
              dts: gop.dts,
              byteLength: gop.byteLength
            };
          }));

          // save all the nals in the last GOP into the gop cache
          this.gopCache_.unshift({
            gop: gops.pop(),
            pps: track.pps,
            sps: track.sps
          });

          // Keep a maximum of 6 GOPs in the cache
          this.gopCache_.length = Math.min(6, this.gopCache_.length);

          // Clear nalUnits
          nalUnits = [];

          this.trigger('baseMediaDecodeTime', track.baseMediaDecodeTime);
          this.trigger('timelineStartInfo', track.timelineStartInfo);

          moof = mp4Generator.moof(sequenceNumber, [track]);

          // it would be great to allocate this array up front instead of
          // throwing away hundreds of media segment fragments
          boxes = new Uint8Array(moof.byteLength + mdat.byteLength);

          // Bump the sequence number for next time
          sequenceNumber++;

          boxes.set(moof);
          boxes.set(mdat, moof.byteLength);

          this.trigger('data', {track: track, boxes: boxes});

          this.resetStream_();

          // Continue with the flush process now
          this.trigger('done', 'VideoSegmentStream');
        };

        this.resetStream_ = function () {
          clearDtsInfo(track);

          // reset config and pps because they may differ across segments
          // for instance, when we are rendition switching
          config = undefined;
          pps = undefined;
        };

        // Search for a candidate Gop for gop-fusion from the gop cache and
        // return it or return null if no good candidate was found
        this.getGopForFusion_ = function (nalUnit) {
          var halfSecond = 45000,

            // Half-a-second in a 90khz clock
            allowableOverlap = 10000,

            // About 3 frames @ 30fps
            nearestDistance = Infinity,
            dtsDistance,
            nearestGopObj,
            currentGop,
            currentGopObj,
            i;

          // Search for the GOP nearest to the beginning of this nal unit
          for (i = 0; i < this.gopCache_.length; i++) {
            currentGopObj = this.gopCache_[i];
            currentGop = currentGopObj.gop;

            // Reject Gops with different SPS or PPS
            if (!(track.pps && arrayEquals(track.pps[0], currentGopObj.pps[0])) || !(track.sps && arrayEquals(track.sps[0], currentGopObj.sps[0]))) {
              continue;
            }

            // Reject Gops that would require a negative baseMediaDecodeTime
            if (currentGop.dts < track.timelineStartInfo.dts) {
              continue;
            }

            // The distance between the end of the gop and the start of the nalUnit
            dtsDistance = nalUnit.dts - currentGop.dts - currentGop.duration;

            // Only consider GOPS that start before the nal unit and end within
            // a half-second of the nal unit
            if (dtsDistance >= -allowableOverlap && dtsDistance <= halfSecond) {

              // Always use the closest GOP we found if there is more than
              // one candidate
              if (!nearestGopObj || nearestDistance > dtsDistance) {
                nearestGopObj = currentGopObj;
                nearestDistance = dtsDistance;
              }
            }
          }

          if (nearestGopObj) {
            return nearestGopObj.gop;
          }
          return null;
        };

        this.extendFirstKeyFrame_ = function (gops) {
          var currentGop;

          if (!gops[0][0].keyFrame && gops.length > 1) {
            // Remove the first GOP
            currentGop = gops.shift();

            gops.byteLength -= currentGop.byteLength;
            gops.nalCount -= currentGop.nalCount;

            // Extend the first frame of what is now the
            // first gop to cover the time period of the
            // frames we just removed
            gops[0][0].dts = currentGop.dts;
            gops[0][0].pts = currentGop.pts;
            gops[0][0].duration += currentGop.duration;
          }

          return gops;
        };

        // Convert an array of nal units into an array of frames with each frame being
        // composed of the nal units that make up that frame
        // Also keep track of cummulative data about the frame from the nal units such
        // as the frame duration, starting pts, etc.
        this.groupNalsIntoFrames_ = function (nalUnits) {
          var i,
            currentNal,
            currentFrame = [],
            frames = [];

          currentFrame.byteLength = 0;

          for (i = 0; i < nalUnits.length; i++) {
            currentNal = nalUnits[i];

            // Split on 'aud'-type nal units
            if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {
              // Since the very first nal unit is expected to be an AUD
              // only push to the frames array when currentFrame is not empty
              if (currentFrame.length) {
                currentFrame.duration = currentNal.dts - currentFrame.dts;
                frames.push(currentFrame);
              }
              currentFrame = [currentNal];
              currentFrame.byteLength = currentNal.data.byteLength;
              currentFrame.pts = currentNal.pts;
              currentFrame.dts = currentNal.dts;
            } else {
              // Specifically flag key frames for ease of use later
              if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {
                currentFrame.keyFrame = true;
              }
              currentFrame.duration = currentNal.dts - currentFrame.dts;
              currentFrame.byteLength += currentNal.data.byteLength;
              currentFrame.push(currentNal);
            }
          }

          // For the last frame, use the duration of the previous frame if we
          // have nothing better to go on
          if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) {
            currentFrame.duration = frames[frames.length - 1].duration;
          }

          // Push the final frame
          frames.push(currentFrame);
          return frames;
        };

        // Convert an array of frames into an array of Gop with each Gop being composed
        // of the frames that make up that Gop
        // Also keep track of cummulative data about the Gop from the frames such as the
        // Gop duration, starting pts, etc.
        this.groupFramesIntoGops_ = function (frames) {
          var i,
            currentFrame,
            currentGop = [],
            gops = [];

          // We must pre-set some of the values on the Gop since we
          // keep running totals of these values
          currentGop.byteLength = 0;
          currentGop.nalCount = 0;
          currentGop.duration = 0;
          currentGop.pts = frames[0].pts;
          currentGop.dts = frames[0].dts;

          // store some metadata about all the Gops
          gops.byteLength = 0;
          gops.nalCount = 0;
          gops.duration = 0;
          gops.pts = frames[0].pts;
          gops.dts = frames[0].dts;

          for (i = 0; i < frames.length; i++) {
            currentFrame = frames[i];

            if (currentFrame.keyFrame) {
              // Since the very first frame is expected to be an keyframe
              // only push to the gops array when currentGop is not empty
              if (currentGop.length) {
                gops.push(currentGop);
                gops.byteLength += currentGop.byteLength;
                gops.nalCount += currentGop.nalCount;
                gops.duration += currentGop.duration;
              }

              currentGop = [currentFrame];
              currentGop.nalCount = currentFrame.length;
              currentGop.byteLength = currentFrame.byteLength;
              currentGop.pts = currentFrame.pts;
              currentGop.dts = currentFrame.dts;
              currentGop.duration = currentFrame.duration;
            } else {
              currentGop.duration += currentFrame.duration;
              currentGop.nalCount += currentFrame.length;
              currentGop.byteLength += currentFrame.byteLength;
              currentGop.push(currentFrame);
            }
          }

          if (gops.length && currentGop.duration <= 0) {
            currentGop.duration = gops[gops.length - 1].duration;
          }
          gops.byteLength += currentGop.byteLength;
          gops.nalCount += currentGop.nalCount;
          gops.duration += currentGop.duration;

          // push the final Gop
          gops.push(currentGop);
          return gops;
        };

        // generate the track's sample table from an array of gops
        this.generateSampleTable_ = function (gops, baseDataOffset) {
          var h,
            i,
            sample,
            currentGop,
            currentFrame,
            dataOffset = baseDataOffset || 0,
            samples = [];

          for (h = 0; h < gops.length; h++) {
            currentGop = gops[h];

            for (i = 0; i < currentGop.length; i++) {
              currentFrame = currentGop[i];

              sample = createDefaultSample();

              sample.dataOffset = dataOffset;
              sample.compositionTimeOffset = currentFrame.pts - currentFrame.dts;
              sample.duration = currentFrame.duration;
              sample.size = 4 * currentFrame.length; // Space for nal unit size
              sample.size += currentFrame.byteLength;

              if (currentFrame.keyFrame) {
                sample.flags.dependsOn = 2;
              }

              dataOffset += sample.size;

              samples.push(sample);
            }
          }
          return samples;
        };

        // generate the track's raw mdat data from an array of gops
        this.concatenateNalData_ = function (gops) {
          var h,
            i,
            j,
            currentGop,
            currentFrame,
            currentNal,
            dataOffset = 0,
            nalsByteLength = gops.byteLength,
            numberOfNals = gops.nalCount,
            totalByteLength = nalsByteLength + 4 * numberOfNals,
            data = new Uint8Array(totalByteLength),
            view = new DataView(data.buffer);

          // For each Gop..
          for (h = 0; h < gops.length; h++) {
            currentGop = gops[h];

            // For each Frame..
            for (i = 0; i < currentGop.length; i++) {
              currentFrame = currentGop[i];

              // For each NAL..
              for (j = 0; j < currentFrame.length; j++) {
                currentNal = currentFrame[j];

                view.setUint32(dataOffset, currentNal.data.byteLength);
                dataOffset += 4;
                data.set(currentNal.data, dataOffset);
                dataOffset += currentNal.data.byteLength;
              }
            }
          }
          return data;
        };

        // trim gop list to the first gop found that has a matching pts with a gop in the list
        // of gopsToAlignWith starting from the START of the list
        this.alignGopsAtStart_ = function (gops) {
          var alignIndex, gopIndex, align, gop, byteLength, nalCount, duration, alignedGops;

          byteLength = gops.byteLength;
          nalCount = gops.nalCount;
          duration = gops.duration;
          alignIndex = gopIndex = 0;

          while (alignIndex < gopsToAlignWith.length && gopIndex < gops.length) {
            align = gopsToAlignWith[alignIndex];
            gop = gops[gopIndex];

            if (align.pts === gop.pts) {
              break;
            }

            if (gop.pts > align.pts) {
              // this current gop starts after the current gop we want to align on, so increment
              // align index
              alignIndex++;
              continue;
            }

            // current gop starts before the current gop we want to align on. so increment gop
            // index
            gopIndex++;
            byteLength -= gop.byteLength;
            nalCount -= gop.nalCount;
            duration -= gop.duration;
          }

          if (gopIndex === 0) {
            // no gops to trim
            return gops;
          }

          if (gopIndex === gops.length) {
            // all gops trimmed, skip appending all gops
            return null;
          }

          alignedGops = gops.slice(gopIndex);
          alignedGops.byteLength = byteLength;
          alignedGops.duration = duration;
          alignedGops.nalCount = nalCount;
          alignedGops.pts = alignedGops[0].pts;
          alignedGops.dts = alignedGops[0].dts;

          return alignedGops;
        };

        // trim gop list to the first gop found that has a matching pts with a gop in the list
        // of gopsToAlignWith starting from the END of the list
        this.alignGopsAtEnd_ = function (gops) {
          var alignIndex, gopIndex, align, gop, alignEndIndex, matchFound;

          alignIndex = gopsToAlignWith.length - 1;
          gopIndex = gops.length - 1;
          alignEndIndex = null;
          matchFound = false;

          while (alignIndex >= 0 && gopIndex >= 0) {
            align = gopsToAlignWith[alignIndex];
            gop = gops[gopIndex];

            if (align.pts === gop.pts) {
              matchFound = true;
              break;
            }

            if (align.pts > gop.pts) {
              alignIndex--;
              continue;
            }

            if (alignIndex === gopsToAlignWith.length - 1) {
              // gop.pts is greater than the last alignment candidate. If no match is found
              // by the end of this loop, we still want to append gops that come after this
              // point
              alignEndIndex = gopIndex;
            }

            gopIndex--;
          }

          if (!matchFound && alignEndIndex === null) {
            return null;
          }

          var trimIndex;

          if (matchFound) {
            trimIndex = gopIndex;
          } else {
            trimIndex = alignEndIndex;
          }

          if (trimIndex === 0) {
            return gops;
          }

          var alignedGops = gops.slice(trimIndex);
          var metadata = alignedGops.reduce(function (total, gop) {
            total.byteLength += gop.byteLength;
            total.duration += gop.duration;
            total.nalCount += gop.nalCount;
            return total;
          }, {byteLength: 0, duration: 0, nalCount: 0});

          alignedGops.byteLength = metadata.byteLength;
          alignedGops.duration = metadata.duration;
          alignedGops.nalCount = metadata.nalCount;
          alignedGops.pts = alignedGops[0].pts;
          alignedGops.dts = alignedGops[0].dts;

          return alignedGops;
        };

        this.alignGopsWith = function (newGopsToAlignWith) {
          gopsToAlignWith = newGopsToAlignWith;
        };
      };

      _VideoSegmentStream.prototype = new stream();

      /**
       * Store information about the start and end of the track and the
       * duration for each frame/sample we process in order to calculate
       * the baseMediaDecodeTime
       */
      collectDtsInfo = function collectDtsInfo(track, data) {
        if (typeof data.pts === 'number') {
          if (track.timelineStartInfo.pts === undefined) {
            track.timelineStartInfo.pts = data.pts;
          }

          if (track.minSegmentPts === undefined) {
            track.minSegmentPts = data.pts;
          } else {
            track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);
          }

          if (track.maxSegmentPts === undefined) {
            track.maxSegmentPts = data.pts;
          } else {
            track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);
          }
        }

        if (typeof data.dts === 'number') {
          if (track.timelineStartInfo.dts === undefined) {
            track.timelineStartInfo.dts = data.dts;
          }

          if (track.minSegmentDts === undefined) {
            track.minSegmentDts = data.dts;
          } else {
            track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);
          }

          if (track.maxSegmentDts === undefined) {
            track.maxSegmentDts = data.dts;
          } else {
            track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);
          }
        }
      };

      /**
       * Clear values used to calculate the baseMediaDecodeTime between
       * tracks
       */
      clearDtsInfo = function clearDtsInfo(track) {
        delete track.minSegmentDts;
        delete track.maxSegmentDts;
        delete track.minSegmentPts;
        delete track.maxSegmentPts;
      };

      /**
       * Calculate the track's baseMediaDecodeTime based on the earliest
       * DTS the transmuxer has ever seen and the minimum DTS for the
       * current track
       * @param track {object} track metadata configuration
       * @param keepOriginalTimestamps {boolean} If true, keep the timestamps
       *        in the source; false to adjust the first segment to start at 0.
       */
      calculateTrackBaseMediaDecodeTime = function calculateTrackBaseMediaDecodeTime(track, keepOriginalTimestamps) {
        var baseMediaDecodeTime,
          scale,
          minSegmentDts = track.minSegmentDts;

        // Optionally adjust the time so the first segment starts at zero.
        if (!keepOriginalTimestamps) {
          minSegmentDts -= track.timelineStartInfo.dts;
        }

        // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where
        // we want the start of the first segment to be placed
        baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime;

        // Add to that the distance this segment is from the very first
        baseMediaDecodeTime += minSegmentDts;

        // baseMediaDecodeTime must not become negative
        baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);

        if (track.type === 'audio') {
          // Audio has a different clock equal to the sampling_rate so we need to
          // scale the PTS values into the clock rate of the track
          scale = track.samplerate / ONE_SECOND_IN_TS$1;
          baseMediaDecodeTime *= scale;
          baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);
        }

        return baseMediaDecodeTime;
      };

      /**
       * A Stream that can combine multiple streams (ie. audio & video)
       * into a single output segment for MSE. Also supports audio-only
       * and video-only streams.
       */
      _CoalesceStream = function CoalesceStream(options, metadataStream) {
        // Number of Tracks per output segment
        // If greater than 1, we combine multiple
        // tracks into a single segment
        this.numberOfTracks = 0;
        this.metadataStream = metadataStream;

        if (typeof options.remux !== 'undefined') {
          this.remuxTracks = !!options.remux;
        } else {
          this.remuxTracks = true;
        }

        this.pendingTracks = [];
        this.videoTrack = null;
        this.pendingBoxes = [];
        this.pendingCaptions = [];
        this.pendingMetadata = [];
        this.pendingBytes = 0;
        this.emittedTracks = 0;

        _CoalesceStream.prototype.init.call(this);

        // Take output from multiple
        this.push = function (output) {
          // buffer incoming captions until the associated video segment
          // finishes
          if (output.text) {
            return this.pendingCaptions.push(output);
          }
          // buffer incoming id3 tags until the final flush
          if (output.frames) {
            return this.pendingMetadata.push(output);
          }

          // Add this track to the list of pending tracks and store
          // important information required for the construction of
          // the final segment
          this.pendingTracks.push(output.track);
          this.pendingBoxes.push(output.boxes);
          this.pendingBytes += output.boxes.byteLength;

          if (output.track.type === 'video') {
            this.videoTrack = output.track;
          }
          if (output.track.type === 'audio') {
            this.audioTrack = output.track;
          }
        };
      };

      _CoalesceStream.prototype = new stream();
      _CoalesceStream.prototype.flush = function (flushSource) {
        var offset = 0,
          event = {
            captions: [],
            captionStreams: {},
            metadata: [],
            info: {}
          },
          caption,
          id3,
          initSegment,
          timelineStartPts = 0,
          i;

        if (this.pendingTracks.length < this.numberOfTracks) {
          if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') {
            // Return because we haven't received a flush from a data-generating
            // portion of the segment (meaning that we have only recieved meta-data
            // or captions.)
            return;
          } else if (this.remuxTracks) {
            // Return until we have enough tracks from the pipeline to remux (if we
            // are remuxing audio and video into a single MP4)
            return;
          } else if (this.pendingTracks.length === 0) {
            // In the case where we receive a flush without any data having been
            // received we consider it an emitted track for the purposes of coalescing
            // `done` events.
            // We do this for the case where there is an audio and video track in the
            // segment but no audio data. (seen in several playlists with alternate
            // audio tracks and no audio present in the main TS segments.)
            this.emittedTracks++;

            if (this.emittedTracks >= this.numberOfTracks) {
              this.trigger('done');
              this.emittedTracks = 0;
            }
            return;
          }
        }

        if (this.videoTrack) {
          timelineStartPts = this.videoTrack.timelineStartInfo.pts;
          VIDEO_PROPERTIES.forEach(function (prop) {
            event.info[prop] = this.videoTrack[prop];
          }, this);
        } else if (this.audioTrack) {
          timelineStartPts = this.audioTrack.timelineStartInfo.pts;
          AUDIO_PROPERTIES.forEach(function (prop) {
            event.info[prop] = this.audioTrack[prop];
          }, this);
        }

        if (this.pendingTracks.length === 1) {
          event.type = this.pendingTracks[0].type;
        } else {
          event.type = 'combined';
        }

        this.emittedTracks += this.pendingTracks.length;

        initSegment = mp4Generator.initSegment(this.pendingTracks);

        // Create a new typed array to hold the init segment
        event.initSegment = new Uint8Array(initSegment.byteLength);

        // Create an init segment containing a moov
        // and track definitions
        event.initSegment.set(initSegment);

        // Create a new typed array to hold the moof+mdats
        event.data = new Uint8Array(this.pendingBytes);

        // Append each moof+mdat (one per track) together
        for (i = 0; i < this.pendingBoxes.length; i++) {
          event.data.set(this.pendingBoxes[i], offset);
          offset += this.pendingBoxes[i].byteLength;
        }

        // Translate caption PTS times into second offsets into the
        // video timeline for the segment, and add track info
        for (i = 0; i < this.pendingCaptions.length; i++) {
          caption = this.pendingCaptions[i];
          caption.startTime = caption.startPts - timelineStartPts;
          caption.startTime /= 90e3;
          caption.endTime = caption.endPts - timelineStartPts;
          caption.endTime /= 90e3;
          event.captionStreams[caption.stream] = true;
          event.captions.push(caption);
        }

        // Translate ID3 frame PTS times into second offsets into the
        // video timeline for the segment
        for (i = 0; i < this.pendingMetadata.length; i++) {
          id3 = this.pendingMetadata[i];
          id3.cueTime = id3.pts - timelineStartPts;
          id3.cueTime /= 90e3;
          event.metadata.push(id3);
        }
        // We add this to every single emitted segment even though we only need
        // it for the first
        event.metadata.dispatchType = this.metadataStream.dispatchType;

        // Reset stream state
        this.pendingTracks.length = 0;
        this.videoTrack = null;
        this.pendingBoxes.length = 0;
        this.pendingCaptions.length = 0;
        this.pendingBytes = 0;
        this.pendingMetadata.length = 0;

        // Emit the built segment
        this.trigger('data', event);

        // Only emit `done` if all tracks have been flushed and emitted
        if (this.emittedTracks >= this.numberOfTracks) {
          this.trigger('done');
          this.emittedTracks = 0;
        }
      };
      /**
       * A Stream that expects MP2T binary data as input and produces
       * corresponding media segments, suitable for use with Media Source
       * Extension (MSE) implementations that support the ISO BMFF byte
       * stream format, like Chrome.
       */
      _Transmuxer = function Transmuxer(options) {
        var self = this,
          hasFlushed = true,
          videoTrack,
          audioTrack;

        _Transmuxer.prototype.init.call(this);

        options = options || {};
        this.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;
        this.transmuxPipeline_ = {};

        this.setupAacPipeline = function () {
          var pipeline = {};
          this.transmuxPipeline_ = pipeline;

          pipeline.type = 'aac';
          pipeline.metadataStream = new m2ts_1.MetadataStream();

          // set up the parsing pipeline
          pipeline.aacStream = new aac();
          pipeline.audioTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('audio');
          pipeline.timedMetadataTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('timed-metadata');
          pipeline.adtsStream = new adts();
          pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);
          pipeline.headOfPipeline = pipeline.aacStream;

          pipeline.aacStream.pipe(pipeline.audioTimestampRolloverStream).pipe(pipeline.adtsStream);
          pipeline.aacStream.pipe(pipeline.timedMetadataTimestampRolloverStream).pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream);

          pipeline.metadataStream.on('timestamp', function (frame) {
            pipeline.aacStream.setTimestamp(frame.timeStamp);
          });

          pipeline.aacStream.on('data', function (data) {
            if (data.type === 'timed-metadata' && !pipeline.audioSegmentStream) {
              audioTrack = audioTrack || {
                timelineStartInfo: {
                  baseMediaDecodeTime: self.baseMediaDecodeTime
                },
                codec: 'adts',
                type: 'audio'
              };
              // hook up the audio segment stream to the first track with aac data
              pipeline.coalesceStream.numberOfTracks++;
              pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);
              // Set up the final part of the audio pipeline
              pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream);
            }
          });

          // Re-emit any data coming from the coalesce stream to the outside world
          pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));
          // Let the consumer know we have finished flushing the entire pipeline
          pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));
        };

        this.setupTsPipeline = function () {
          var pipeline = {};
          this.transmuxPipeline_ = pipeline;

          pipeline.type = 'ts';
          pipeline.metadataStream = new m2ts_1.MetadataStream();

          // set up the parsing pipeline
          pipeline.packetStream = new m2ts_1.TransportPacketStream();
          pipeline.parseStream = new m2ts_1.TransportParseStream();
          pipeline.elementaryStream = new m2ts_1.ElementaryStream();
          pipeline.videoTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('video');
          pipeline.audioTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('audio');
          pipeline.timedMetadataTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('timed-metadata');
          pipeline.adtsStream = new adts();
          pipeline.h264Stream = new H264Stream();
          pipeline.captionStream = new m2ts_1.CaptionStream();
          pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);
          pipeline.headOfPipeline = pipeline.packetStream;

          // disassemble MPEG2-TS packets into elementary streams
          pipeline.packetStream.pipe(pipeline.parseStream).pipe(pipeline.elementaryStream);

          // !!THIS ORDER IS IMPORTANT!!
          // demux the streams
          pipeline.elementaryStream.pipe(pipeline.videoTimestampRolloverStream).pipe(pipeline.h264Stream);
          pipeline.elementaryStream.pipe(pipeline.audioTimestampRolloverStream).pipe(pipeline.adtsStream);

          pipeline.elementaryStream.pipe(pipeline.timedMetadataTimestampRolloverStream).pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream);

          // Hook up CEA-608/708 caption stream
          pipeline.h264Stream.pipe(pipeline.captionStream).pipe(pipeline.coalesceStream);

          pipeline.elementaryStream.on('data', function (data) {
            var i;

            if (data.type === 'metadata') {
              i = data.tracks.length;

              // scan the tracks listed in the metadata
              while (i--) {
                if (!videoTrack && data.tracks[i].type === 'video') {
                  videoTrack = data.tracks[i];
                  videoTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;
                } else if (!audioTrack && data.tracks[i].type === 'audio') {
                  audioTrack = data.tracks[i];
                  audioTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;
                }
              }

              // hook up the video segment stream to the first track with h264 data
              if (videoTrack && !pipeline.videoSegmentStream) {
                pipeline.coalesceStream.numberOfTracks++;
                pipeline.videoSegmentStream = new _VideoSegmentStream(videoTrack, options);

                pipeline.videoSegmentStream.on('timelineStartInfo', function (timelineStartInfo) {
                  // When video emits timelineStartInfo data after a flush, we forward that
                  // info to the AudioSegmentStream, if it exists, because video timeline
                  // data takes precedence.
                  if (audioTrack) {
                    audioTrack.timelineStartInfo = timelineStartInfo;
                    // On the first segment we trim AAC frames that exist before the
                    // very earliest DTS we have seen in video because Chrome will
                    // interpret any video track with a baseMediaDecodeTime that is
                    // non-zero as a gap.
                    pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts);
                  }
                });

                pipeline.videoSegmentStream.on('processedGopsInfo', self.trigger.bind(self, 'gopInfo'));

                pipeline.videoSegmentStream.on('baseMediaDecodeTime', function (baseMediaDecodeTime) {
                  if (audioTrack) {
                    pipeline.audioSegmentStream.setVideoBaseMediaDecodeTime(baseMediaDecodeTime);
                  }
                });

                // Set up the final part of the video pipeline
                pipeline.h264Stream.pipe(pipeline.videoSegmentStream).pipe(pipeline.coalesceStream);
              }

              if (audioTrack && !pipeline.audioSegmentStream) {
                // hook up the audio segment stream to the first track with aac data
                pipeline.coalesceStream.numberOfTracks++;
                pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);

                // Set up the final part of the audio pipeline
                pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream);
              }
            }
          });

          // Re-emit any data coming from the coalesce stream to the outside world
          pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));
          // Let the consumer know we have finished flushing the entire pipeline
          pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));
        };

        // hook up the segment streams once track metadata is delivered
        this.setBaseMediaDecodeTime = function (baseMediaDecodeTime) {
          var pipeline = this.transmuxPipeline_;

          this.baseMediaDecodeTime = baseMediaDecodeTime;
          if (audioTrack) {
            audioTrack.timelineStartInfo.dts = undefined;
            audioTrack.timelineStartInfo.pts = undefined;
            clearDtsInfo(audioTrack);
            audioTrack.timelineStartInfo.baseMediaDecodeTime = baseMediaDecodeTime;
            if (pipeline.audioTimestampRolloverStream) {
              pipeline.audioTimestampRolloverStream.discontinuity();
            }
          }
          if (videoTrack) {
            if (pipeline.videoSegmentStream) {
              pipeline.videoSegmentStream.gopCache_ = [];
              pipeline.videoTimestampRolloverStream.discontinuity();
            }
            videoTrack.timelineStartInfo.dts = undefined;
            videoTrack.timelineStartInfo.pts = undefined;
            clearDtsInfo(videoTrack);
            pipeline.captionStream.reset();
            videoTrack.timelineStartInfo.baseMediaDecodeTime = baseMediaDecodeTime;
          }

          if (pipeline.timedMetadataTimestampRolloverStream) {
            pipeline.timedMetadataTimestampRolloverStream.discontinuity();
          }
        };

        this.setAudioAppendStart = function (timestamp) {
          if (audioTrack) {
            this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(timestamp);
          }
        };

        this.alignGopsWith = function (gopsToAlignWith) {
          if (videoTrack && this.transmuxPipeline_.videoSegmentStream) {
            this.transmuxPipeline_.videoSegmentStream.alignGopsWith(gopsToAlignWith);
          }
        };

        // feed incoming data to the front of the parsing pipeline
        this.push = function (data) {
          if (hasFlushed) {
            var isAac = isLikelyAacData(data);

            if (isAac && this.transmuxPipeline_.type !== 'aac') {
              this.setupAacPipeline();
            } else if (!isAac && this.transmuxPipeline_.type !== 'ts') {
              this.setupTsPipeline();
            }
            hasFlushed = false;
          }
          this.transmuxPipeline_.headOfPipeline.push(data);
        };

        // flush any buffered data
        this.flush = function () {
          hasFlushed = true;
          // Start at the top of the pipeline and flush all pending work
          this.transmuxPipeline_.headOfPipeline.flush();
        };

        // Caption data has to be reset when seeking outside buffered range
        this.resetCaptions = function () {
          if (this.transmuxPipeline_.captionStream) {
            this.transmuxPipeline_.captionStream.reset();
          }
        };
      };
      _Transmuxer.prototype = new stream();

      var transmuxer = {
        Transmuxer: _Transmuxer,
        VideoSegmentStream: _VideoSegmentStream,
        AudioSegmentStream: _AudioSegmentStream,
        AUDIO_PROPERTIES: AUDIO_PROPERTIES,
        VIDEO_PROPERTIES: VIDEO_PROPERTIES
      };

      var mp4 = {
        generator: mp4Generator,
        Transmuxer: transmuxer.Transmuxer,
        AudioSegmentStream: transmuxer.AudioSegmentStream,
        VideoSegmentStream: transmuxer.VideoSegmentStream
      };

      var classCallCheck$$1 = function classCallCheck$$1(instance, Constructor) {
        if (!(instance instanceof Constructor)) {
          throw new TypeError("Cannot call a class as a function");
        }
      };

      var createClass$$1 = function () {
        function defineProperties(target, props) {
          for (var i = 0; i < props.length; i++) {
            var descriptor = props[i];
            descriptor.enumerable = descriptor.enumerable || false;
            descriptor.configurable = true;
            if ("value" in descriptor) descriptor.writable = true;
            Object.defineProperty(target, descriptor.key, descriptor);
          }
        }

        return function (Constructor, protoProps, staticProps) {
          if (protoProps) defineProperties(Constructor.prototype, protoProps);
          if (staticProps) defineProperties(Constructor, staticProps);
          return Constructor;
        };
      }();

      /**
       * @file transmuxer-worker.js
       */

      /**
       * Re-emits transmuxer events by converting them into messages to the
       * world outside the worker.
       *
       * @param {Object} transmuxer the transmuxer to wire events on
       * @private
       */
      var wireTransmuxerEvents = function wireTransmuxerEvents(transmuxer) {
        transmuxer.on('data', function (segment) {
          // transfer ownership of the underlying ArrayBuffer
          // instead of doing a copy to save memory
          // ArrayBuffers are transferable but generic TypedArrays are not
          // @link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#Passing_data_by_transferring_ownership_(transferable_objects)
          var initArray = segment.initSegment;

          segment.initSegment = {
            data: initArray.buffer,
            byteOffset: initArray.byteOffset,
            byteLength: initArray.byteLength
          };

          var typedArray = segment.data;

          segment.data = typedArray.buffer;
          window_1$$1.postMessage({
            action: 'data',
            segment: segment,
            byteOffset: typedArray.byteOffset,
            byteLength: typedArray.byteLength
          }, [segment.data]);
        });

        if (transmuxer.captionStream) {
          transmuxer.captionStream.on('data', function (caption) {
            window_1$$1.postMessage({
              action: 'caption',
              data: caption
            });
          });
        }

        transmuxer.on('done', function (data) {
          window_1$$1.postMessage({action: 'done'});
        });

        transmuxer.on('gopInfo', function (gopInfo) {
          window_1$$1.postMessage({
            action: 'gopInfo',
            gopInfo: gopInfo
          });
        });
      };

      /**
       * All incoming messages route through this hash. If no function exists
       * to handle an incoming message, then we ignore the message.
       *
       * @class MessageHandlers
       * @param {Object} options the options to initialize with
       */

      var MessageHandlers = function () {
        function MessageHandlers(options) {
          classCallCheck$$1(this, MessageHandlers);

          this.options = options || {};
          this.init();
        }

        /**
         * initialize our web worker and wire all the events.
         */

        createClass$$1(MessageHandlers, [{
          key: 'init',
          value: function init() {
            if (this.transmuxer) {
              this.transmuxer.dispose();
            }
            this.transmuxer = new mp4.Transmuxer(this.options);
            wireTransmuxerEvents(this.transmuxer);
          }

          /**
           * Adds data (a ts segment) to the start of the transmuxer pipeline for
           * processing.
           *
           * @param {ArrayBuffer} data data to push into the muxer
           */

        }, {
          key: 'push',
          value: function push(data) {
            // Cast array buffer to correct type for transmuxer
            var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);

            this.transmuxer.push(segment);
          }

          /**
           * Recreate the transmuxer so that the next segment added via `push`
           * start with a fresh transmuxer.
           */

        }, {
          key: 'reset',
          value: function reset() {
            this.init();
          }

          /**
           * Set the value that will be used as the `baseMediaDecodeTime` time for the
           * next segment pushed in. Subsequent segments will have their `baseMediaDecodeTime`
           * set relative to the first based on the PTS values.
           *
           * @param {Object} data used to set the timestamp offset in the muxer
           */

        }, {
          key: 'setTimestampOffset',
          value: function setTimestampOffset(data) {
            var timestampOffset = data.timestampOffset || 0;

            this.transmuxer.setBaseMediaDecodeTime(Math.round(timestampOffset * 90000));
          }
        }, {
          key: 'setAudioAppendStart',
          value: function setAudioAppendStart(data) {
            this.transmuxer.setAudioAppendStart(Math.ceil(data.appendStart * 90000));
          }

          /**
           * Forces the pipeline to finish processing the last segment and emit it's
           * results.
           *
           * @param {Object} data event data, not really used
           */

        }, {
          key: 'flush',
          value: function flush(data) {
            this.transmuxer.flush();
          }
        }, {
          key: 'resetCaptions',
          value: function resetCaptions() {
            this.transmuxer.resetCaptions();
          }
        }, {
          key: 'alignGopsWith',
          value: function alignGopsWith(data) {
            this.transmuxer.alignGopsWith(data.gopsToAlignWith.slice());
          }
        }]);
        return MessageHandlers;
      }();

      /**
       * Our web wroker interface so that things can talk to mux.js
       * that will be running in a web worker. the scope is passed to this by
       * webworkify.
       *
       * @param {Object} self the scope for the web worker
       */

      var TransmuxerWorker = function TransmuxerWorker(self) {
        self.onmessage = function (event) {
          if (event.data.action === 'init' && event.data.options) {
            this.messageHandlers = new MessageHandlers(event.data.options);
            return;
          }

          if (!this.messageHandlers) {
            this.messageHandlers = new MessageHandlers();
          }

          if (event.data && event.data.action && event.data.action !== 'init') {
            if (this.messageHandlers[event.data.action]) {
              this.messageHandlers[event.data.action](event.data);
            }
          }
        };
      };

      var transmuxerWorker = new TransmuxerWorker(self);

      return transmuxerWorker;
    }();
  });

  /**
   * @file codec-utils.js
   */

  /**
   * Check if a codec string refers to an audio codec.
   *
   * @param {String} codec codec string to check
   * @return {Boolean} if this is an audio codec
   * @private
   */
  var isAudioCodec = function isAudioCodec(codec) {
    return (/mp4a\.\d+.\d+/i.test(codec)
    );
  };

  /**
   * Check if a codec string refers to a video codec.
   *
   * @param {String} codec codec string to check
   * @return {Boolean} if this is a video codec
   * @private
   */
  var isVideoCodec = function isVideoCodec(codec) {
    return (/avc1\.[\da-f]+/i.test(codec)
    );
  };

  /**
   * Parse a content type header into a type and parameters
   * object
   *
   * @param {String} type the content type header
   * @return {Object} the parsed content-type
   * @private
   */
  var parseContentType = function parseContentType(type) {
    var object = {type: '', parameters: {}};
    var parameters = type.trim().split(';');

    // first parameter should always be content-type
    object.type = parameters.shift().trim();
    parameters.forEach(function (parameter) {
      var pair = parameter.trim().split('=');

      if (pair.length > 1) {
        var name = pair[0].replace(/"/g, '').trim();
        var value = pair[1].replace(/"/g, '').trim();

        object.parameters[name] = value;
      }
    });

    return object;
  };

  /**
   * Replace the old apple-style `avc1.<dd>.<dd>` codec string with the standard
   * `avc1.<hhhhhh>`
   *
   * @param {Array} codecs an array of codec strings to fix
   * @return {Array} the translated codec array
   * @private
   */
  var translateLegacyCodecs = function translateLegacyCodecs(codecs) {
    return codecs.map(function (codec) {
      return codec.replace(/avc1\.(\d+)\.(\d+)/i, function (orig, profile, avcLevel) {
        var profileHex = ('00' + Number(profile).toString(16)).slice(-2);
        var avcLevelHex = ('00' + Number(avcLevel).toString(16)).slice(-2);

        return 'avc1.' + profileHex + '00' + avcLevelHex;
      });
    });
  };

  /**
   * @file virtual-source-buffer.js
   */

    // We create a wrapper around the SourceBuffer so that we can manage the
    // state of the `updating` property manually. We have to do this because
    // Firefox changes `updating` to false long before triggering `updateend`
    // events and that was causing strange problems in videojs-contrib-hls
  var makeWrappedSourceBuffer = function makeWrappedSourceBuffer(mediaSource, mimeType) {
      var sourceBuffer = mediaSource.addSourceBuffer(mimeType);
      var wrapper = Object.create(null);

      wrapper.updating = false;
      wrapper.realBuffer_ = sourceBuffer;

      var _loop = function _loop(key) {
        if (typeof sourceBuffer[key] === 'function') {
          wrapper[key] = function () {
            return sourceBuffer[key].apply(sourceBuffer, arguments);
          };
        } else if (typeof wrapper[key] === 'undefined') {
          Object.defineProperty(wrapper, key, {
            get: function get$$1() {
              return sourceBuffer[key];
            },
            set: function set$$1(v) {
              return sourceBuffer[key] = v;
            }
          });
        }
      };

      for (var key in sourceBuffer) {
        _loop(key);
      }

      return wrapper;
    };

  /**
   * Returns a list of gops in the buffer that have a pts value of 3 seconds or more in
   * front of current time.
   *
   * @param {Array} buffer
   *        The current buffer of gop information
   * @param {Player} player
   *        The player instance
   * @param {Double} mapping
   *        Offset to map display time to stream presentation time
   * @return {Array}
   *         List of gops considered safe to append over
   */
  var gopsSafeToAlignWith = function gopsSafeToAlignWith(buffer, player, mapping) {
    if (!player || !buffer.length) {
      return [];
    }

    // pts value for current time + 3 seconds to give a bit more wiggle room
    var currentTimePts = Math.ceil((player.currentTime() - mapping + 3) * 90000);

    var i = void 0;

    for (i = 0; i < buffer.length; i++) {
      if (buffer[i].pts > currentTimePts) {
        break;
      }
    }

    return buffer.slice(i);
  };

  /**
   * Appends gop information (timing and byteLength) received by the transmuxer for the
   * gops appended in the last call to appendBuffer
   *
   * @param {Array} buffer
   *        The current buffer of gop information
   * @param {Array} gops
   *        List of new gop information
   * @param {boolean} replace
   *        If true, replace the buffer with the new gop information. If false, append the
   *        new gop information to the buffer in the right location of time.
   * @return {Array}
   *         Updated list of gop information
   */
  var updateGopBuffer = function updateGopBuffer(buffer, gops, replace) {
    if (!gops.length) {
      return buffer;
    }

    if (replace) {
      // If we are in safe append mode, then completely overwrite the gop buffer
      // with the most recent appeneded data. This will make sure that when appending
      // future segments, we only try to align with gops that are both ahead of current
      // time and in the last segment appended.
      return gops.slice();
    }

    var start = gops[0].pts;

    var i = 0;

    for (i; i < buffer.length; i++) {
      if (buffer[i].pts >= start) {
        break;
      }
    }

    return buffer.slice(0, i).concat(gops);
  };

  /**
   * Removes gop information in buffer that overlaps with provided start and end
   *
   * @param {Array} buffer
   *        The current buffer of gop information
   * @param {Double} start
   *        position to start the remove at
   * @param {Double} end
   *        position to end the remove at
   * @param {Double} mapping
   *        Offset to map display time to stream presentation time
   */
  var removeGopBuffer = function removeGopBuffer(buffer, start, end, mapping) {
    var startPts = Math.ceil((start - mapping) * 90000);
    var endPts = Math.ceil((end - mapping) * 90000);
    var updatedBuffer = buffer.slice();

    var i = buffer.length;

    while (i--) {
      if (buffer[i].pts <= endPts) {
        break;
      }
    }

    if (i === -1) {
      // no removal because end of remove range is before start of buffer
      return updatedBuffer;
    }

    var j = i + 1;

    while (j--) {
      if (buffer[j].pts <= startPts) {
        break;
      }
    }

    // clamp remove range start to 0 index
    j = Math.max(j, 0);

    updatedBuffer.splice(j, i - j + 1);

    return updatedBuffer;
  };

  /**
   * VirtualSourceBuffers exist so that we can transmux non native formats
   * into a native format, but keep the same api as a native source buffer.
   * It creates a transmuxer, that works in its own thread (a web worker) and
   * that transmuxer muxes the data into a native format. VirtualSourceBuffer will
   * then send all of that data to the naive sourcebuffer so that it is
   * indestinguishable from a natively supported format.
   *
   * @param {HtmlMediaSource} mediaSource the parent mediaSource
   * @param {Array} codecs array of codecs that we will be dealing with
   * @class VirtualSourceBuffer
   * @extends video.js.EventTarget
   */

  var VirtualSourceBuffer = function (_videojs$EventTarget) {
    inherits(VirtualSourceBuffer, _videojs$EventTarget);

    function VirtualSourceBuffer(mediaSource, codecs) {
      classCallCheck(this, VirtualSourceBuffer);

      var _this7 = possibleConstructorReturn(this, _videojs$EventTarget.call(this, videojs$1.EventTarget));

      _this7.timestampOffset_ = 0;
      _this7.pendingBuffers_ = [];
      _this7.bufferUpdating_ = false;

      _this7.mediaSource_ = mediaSource;
      _this7.codecs_ = codecs;
      _this7.audioCodec_ = null;
      _this7.videoCodec_ = null;
      _this7.audioDisabled_ = false;
      _this7.appendAudioInitSegment_ = true;
      _this7.gopBuffer_ = [];
      _this7.timeMapping_ = 0;
      _this7.safeAppend_ = videojs$1.browser.IE_VERSION >= 11;

      var options = {
        remux: false,
        alignGopsAtEnd: _this7.safeAppend_
      };

      _this7.codecs_.forEach(function (codec) {
        if (isAudioCodec(codec)) {
          _this7.audioCodec_ = codec;
        } else if (isVideoCodec(codec)) {
          _this7.videoCodec_ = codec;
        }
      });

      // append muxed segments to their respective native buffers as
      // soon as they are available
      _this7.transmuxer_ = new TransmuxWorker();
      _this7.transmuxer_.postMessage({action: 'init', options: options});

      _this7.transmuxer_.onmessage = function (event) {
        if (event.data.action === 'data') {
          return _this7.data_(event);
        }

        if (event.data.action === 'done') {
          return _this7.done_(event);
        }

        if (event.data.action === 'gopInfo') {
          return _this7.appendGopInfo_(event);
        }
      };

      // this timestampOffset is a property with the side-effect of resetting
      // baseMediaDecodeTime in the transmuxer on the setter
      Object.defineProperty(_this7, 'timestampOffset', {
        get: function get$$1() {
          return this.timestampOffset_;
        },
        set: function set$$1(val) {
          if (typeof val === 'number' && val >= 0) {
            this.timestampOffset_ = val;
            this.appendAudioInitSegment_ = true;

            // reset gop buffer on timestampoffset as this signals a change in timeline
            this.gopBuffer_.length = 0;
            this.timeMapping_ = 0;

            // We have to tell the transmuxer to set the baseMediaDecodeTime to
            // the desired timestampOffset for the next segment
            this.transmuxer_.postMessage({
              action: 'setTimestampOffset',
              timestampOffset: val
            });
          }
        }
      });

      // setting the append window affects both source buffers
      Object.defineProperty(_this7, 'appendWindowStart', {
        get: function get$$1() {
          return (this.videoBuffer_ || this.audioBuffer_).appendWindowStart;
        },
        set: function set$$1(start) {
          if (this.videoBuffer_) {
            this.videoBuffer_.appendWindowStart = start;
          }
          if (this.audioBuffer_) {
            this.audioBuffer_.appendWindowStart = start;
          }
        }
      });

      // this buffer is "updating" if either of its native buffers are
      Object.defineProperty(_this7, 'updating', {
        get: function get$$1() {
          return !!(this.bufferUpdating_ || !this.audioDisabled_ && this.audioBuffer_ && this.audioBuffer_.updating || this.videoBuffer_ && this.videoBuffer_.updating);
        }
      });

      // the buffered property is the intersection of the buffered
      // ranges of the native source buffers
      Object.defineProperty(_this7, 'buffered', {
        get: function get$$1() {
          var start = null;
          var end = null;
          var arity = 0;
          var extents = [];
          var ranges = [];

          // neither buffer has been created yet
          if (!this.videoBuffer_ && !this.audioBuffer_) {
            return videojs$1.createTimeRange();
          }

          // only one buffer is configured
          if (!this.videoBuffer_) {
            return this.audioBuffer_.buffered;
          }
          if (!this.audioBuffer_) {
            return this.videoBuffer_.buffered;
          }

          // both buffers are configured
          if (this.audioDisabled_) {
            return this.videoBuffer_.buffered;
          }

          // both buffers are empty
          if (this.videoBuffer_.buffered.length === 0 && this.audioBuffer_.buffered.length === 0) {
            return videojs$1.createTimeRange();
          }

          // Handle the case where we have both buffers and create an
          // intersection of the two
          var videoBuffered = this.videoBuffer_.buffered;
          var audioBuffered = this.audioBuffer_.buffered;
          var count = videoBuffered.length;

          // A) Gather up all start and end times
          while (count--) {
            extents.push({time: videoBuffered.start(count), type: 'start'});
            extents.push({time: videoBuffered.end(count), type: 'end'});
          }
          count = audioBuffered.length;
          while (count--) {
            extents.push({time: audioBuffered.start(count), type: 'start'});
            extents.push({time: audioBuffered.end(count), type: 'end'});
          }
          // B) Sort them by time
          extents.sort(function (a, b) {
            return a.time - b.time;
          });

          // C) Go along one by one incrementing arity for start and decrementing
          //    arity for ends
          for (count = 0; count < extents.length; count++) {
            if (extents[count].type === 'start') {
              arity++;

              // D) If arity is ever incremented to 2 we are entering an
              //    overlapping range
              if (arity === 2) {
                start = extents[count].time;
              }
            } else if (extents[count].type === 'end') {
              arity--;

              // E) If arity is ever decremented to 1 we leaving an
              //    overlapping range
              if (arity === 1) {
                end = extents[count].time;
              }
            }

            // F) Record overlapping ranges
            if (start !== null && end !== null) {
              ranges.push([start, end]);
              start = null;
              end = null;
            }
          }

          return videojs$1.createTimeRanges(ranges);
        }
      });
      return _this7;
    }

    /**
     * When we get a data event from the transmuxer
     * we call this function and handle the data that
     * was sent to us
     *
     * @private
     * @param {Event} event the data event from the transmuxer
     */


    VirtualSourceBuffer.prototype.data_ = function data_(event) {
      var segment = event.data.segment;

      // Cast ArrayBuffer to TypedArray
      segment.data = new Uint8Array(segment.data, event.data.byteOffset, event.data.byteLength);

      segment.initSegment = new Uint8Array(segment.initSegment.data, segment.initSegment.byteOffset, segment.initSegment.byteLength);

      createTextTracksIfNecessary(this, this.mediaSource_, segment);

      // Add the segments to the pendingBuffers array
      this.pendingBuffers_.push(segment);
      return;
    };

    /**
     * When we get a done event from the transmuxer
     * we call this function and we process all
     * of the pending data that we have been saving in the
     * data_ function
     *
     * @private
     * @param {Event} event the done event from the transmuxer
     */


    VirtualSourceBuffer.prototype.done_ = function done_(event) {
      // Don't process and append data if the mediaSource is closed
      if (this.mediaSource_.readyState === 'closed') {
        this.pendingBuffers_.length = 0;
        return;
      }

      // All buffers should have been flushed from the muxer
      // start processing anything we have received
      this.processPendingSegments_();
      return;
    };

    /**
     * Create our internal native audio/video source buffers and add
     * event handlers to them with the following conditions:
     * 1. they do not already exist on the mediaSource
     * 2. this VSB has a codec for them
     *
     * @private
     */


    VirtualSourceBuffer.prototype.createRealSourceBuffers_ = function createRealSourceBuffers_() {
      var _this8 = this;

      var types = ['audio', 'video'];

      types.forEach(function (type) {
        // Don't create a SourceBuffer of this type if we don't have a
        // codec for it
        if (!_this8[type + 'Codec_']) {
          return;
        }

        // Do nothing if a SourceBuffer of this type already exists
        if (_this8[type + 'Buffer_']) {
          return;
        }

        var buffer = null;

        // If the mediasource already has a SourceBuffer for the codec
        // use that
        if (_this8.mediaSource_[type + 'Buffer_']) {
          buffer = _this8.mediaSource_[type + 'Buffer_'];
          // In multiple audio track cases, the audio source buffer is disabled
          // on the main VirtualSourceBuffer by the HTMLMediaSource much earlier
          // than createRealSourceBuffers_ is called to create the second
          // VirtualSourceBuffer because that happens as a side-effect of
          // videojs-contrib-hls starting the audioSegmentLoader. As a result,
          // the audioBuffer is essentially "ownerless" and no one will toggle
          // the `updating` state back to false once the `updateend` event is received
          //
          // Setting `updating` to false manually will work around this
          // situation and allow work to continue
          buffer.updating = false;
        } else {
          var codecProperty = type + 'Codec_';
          var mimeType = type + '/mp4;codecs="' + _this8[codecProperty] + '"';

          buffer = makeWrappedSourceBuffer(_this8.mediaSource_.nativeMediaSource_, mimeType);

          _this8.mediaSource_[type + 'Buffer_'] = buffer;
        }

        _this8[type + 'Buffer_'] = buffer;

        // Wire up the events to the SourceBuffer
        ['update', 'updatestart', 'updateend'].forEach(function (event) {
          buffer.addEventListener(event, function () {
            // if audio is disabled
            if (type === 'audio' && _this8.audioDisabled_) {
              return;
            }

            if (event === 'updateend') {
              _this8[type + 'Buffer_'].updating = false;
            }

            var shouldTrigger = types.every(function (t) {
              // skip checking audio's updating status if audio
              // is not enabled
              if (t === 'audio' && _this8.audioDisabled_) {
                return true;
              }
              // if the other type if updating we don't trigger
              if (type !== t && _this8[t + 'Buffer_'] && _this8[t + 'Buffer_'].updating) {
                return false;
              }
              return true;
            });

            if (shouldTrigger) {
              return _this8.trigger(event);
            }
          });
        });
      });
    };

    /**
     * Emulate the native mediasource function, but our function will
     * send all of the proposed segments to the transmuxer so that we
     * can transmux them before we append them to our internal
     * native source buffers in the correct format.
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/appendBuffer
     * @param {Uint8Array} segment the segment to append to the buffer
     */


    VirtualSourceBuffer.prototype.appendBuffer = function appendBuffer(segment) {
      // Start the internal "updating" state
      this.bufferUpdating_ = true;

      if (this.audioBuffer_ && this.audioBuffer_.buffered.length) {
        var audioBuffered = this.audioBuffer_.buffered;

        this.transmuxer_.postMessage({
          action: 'setAudioAppendStart',
          appendStart: audioBuffered.end(audioBuffered.length - 1)
        });
      }

      if (this.videoBuffer_) {
        this.transmuxer_.postMessage({
          action: 'alignGopsWith',
          gopsToAlignWith: gopsSafeToAlignWith(this.gopBuffer_, this.mediaSource_.player_, this.timeMapping_)
        });
      }

      this.transmuxer_.postMessage({
        action: 'push',
        // Send the typed-array of data as an ArrayBuffer so that
        // it can be sent as a "Transferable" and avoid the costly
        // memory copy
        data: segment.buffer,

        // To recreate the original typed-array, we need information
        // about what portion of the ArrayBuffer it was a view into
        byteOffset: segment.byteOffset,
        byteLength: segment.byteLength
      }, [segment.buffer]);
      this.transmuxer_.postMessage({action: 'flush'});
    };

    /**
     * Appends gop information (timing and byteLength) received by the transmuxer for the
     * gops appended in the last call to appendBuffer
     *
     * @param {Event} event
     *        The gopInfo event from the transmuxer
     * @param {Array} event.data.gopInfo
     *        List of gop info to append
     */


    VirtualSourceBuffer.prototype.appendGopInfo_ = function appendGopInfo_(event) {
      this.gopBuffer_ = updateGopBuffer(this.gopBuffer_, event.data.gopInfo, this.safeAppend_);
    };

    /**
     * Emulate the native mediasource function and remove parts
     * of the buffer from any of our internal buffers that exist
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/remove
     * @param {Double} start position to start the remove at
     * @param {Double} end position to end the remove at
     */


    VirtualSourceBuffer.prototype.remove = function remove(start, end) {
      if (this.videoBuffer_) {
        this.videoBuffer_.updating = true;
        this.videoBuffer_.remove(start, end);
        this.gopBuffer_ = removeGopBuffer(this.gopBuffer_, start, end, this.timeMapping_);
      }
      if (!this.audioDisabled_ && this.audioBuffer_) {
        this.audioBuffer_.updating = true;
        this.audioBuffer_.remove(start, end);
      }

      // Remove Metadata Cues (id3)
      removeCuesFromTrack(start, end, this.metadataTrack_);

      // Remove Any Captions
      if (this.inbandTextTracks_) {
        for (var track in this.inbandTextTracks_) {
          removeCuesFromTrack(start, end, this.inbandTextTracks_[track]);
        }
      }
    };

    /**
     * Process any segments that the muxer has output
     * Concatenate segments together based on type and append them into
     * their respective sourceBuffers
     *
     * @private
     */


    VirtualSourceBuffer.prototype.processPendingSegments_ = function processPendingSegments_() {
      var sortedSegments = {
        video: {
          segments: [],
          bytes: 0
        },
        audio: {
          segments: [],
          bytes: 0
        },
        captions: [],
        metadata: []
      };

      // Sort segments into separate video/audio arrays and
      // keep track of their total byte lengths
      sortedSegments = this.pendingBuffers_.reduce(function (segmentObj, segment) {
        var type = segment.type;
        var data = segment.data;
        var initSegment = segment.initSegment;

        segmentObj[type].segments.push(data);
        segmentObj[type].bytes += data.byteLength;

        segmentObj[type].initSegment = initSegment;

        // Gather any captions into a single array
        if (segment.captions) {
          segmentObj.captions = segmentObj.captions.concat(segment.captions);
        }

        if (segment.info) {
          segmentObj[type].info = segment.info;
        }

        // Gather any metadata into a single array
        if (segment.metadata) {
          segmentObj.metadata = segmentObj.metadata.concat(segment.metadata);
        }

        return segmentObj;
      }, sortedSegments);

      // Create the real source buffers if they don't exist by now since we
      // finally are sure what tracks are contained in the source
      if (!this.videoBuffer_ && !this.audioBuffer_) {
        // Remove any codecs that may have been specified by default but
        // are no longer applicable now
        if (sortedSegments.video.bytes === 0) {
          this.videoCodec_ = null;
        }
        if (sortedSegments.audio.bytes === 0) {
          this.audioCodec_ = null;
        }

        this.createRealSourceBuffers_();
      }

      if (sortedSegments.audio.info) {
        this.mediaSource_.trigger({type: 'audioinfo', info: sortedSegments.audio.info});
      }
      if (sortedSegments.video.info) {
        this.mediaSource_.trigger({type: 'videoinfo', info: sortedSegments.video.info});
      }

      if (this.appendAudioInitSegment_) {
        if (!this.audioDisabled_ && this.audioBuffer_) {
          sortedSegments.audio.segments.unshift(sortedSegments.audio.initSegment);
          sortedSegments.audio.bytes += sortedSegments.audio.initSegment.byteLength;
        }
        this.appendAudioInitSegment_ = false;
      }

      var triggerUpdateend = false;

      // Merge multiple video and audio segments into one and append
      if (this.videoBuffer_ && sortedSegments.video.bytes) {
        sortedSegments.video.segments.unshift(sortedSegments.video.initSegment);
        sortedSegments.video.bytes += sortedSegments.video.initSegment.byteLength;
        this.concatAndAppendSegments_(sortedSegments.video, this.videoBuffer_);
        // TODO: are video tracks the only ones with text tracks?
        addTextTrackData(this, sortedSegments.captions, sortedSegments.metadata);
      } else if (this.videoBuffer_ && (this.audioDisabled_ || !this.audioBuffer_)) {
        // The transmuxer did not return any bytes of video, meaning it was all trimmed
        // for gop alignment. Since we have a video buffer and audio is disabled, updateend
        // will never be triggered by this source buffer, which will cause contrib-hls
        // to be stuck forever waiting for updateend. If audio is not disabled, updateend
        // will be triggered by the audio buffer, which will be sent upwards since the video
        // buffer will not be in an updating state.
        triggerUpdateend = true;
      }

      if (!this.audioDisabled_ && this.audioBuffer_) {
        this.concatAndAppendSegments_(sortedSegments.audio, this.audioBuffer_);
      }

      this.pendingBuffers_.length = 0;

      if (triggerUpdateend) {
        this.trigger('updateend');
      }

      // We are no longer in the internal "updating" state
      this.bufferUpdating_ = false;
    };

    /**
     * Combine all segments into a single Uint8Array and then append them
     * to the destination buffer
     *
     * @param {Object} segmentObj
     * @param {SourceBuffer} destinationBuffer native source buffer to append data to
     * @private
     */


    VirtualSourceBuffer.prototype.concatAndAppendSegments_ = function concatAndAppendSegments_(segmentObj, destinationBuffer) {
      var offset = 0;
      var tempBuffer = void 0;

      if (segmentObj.bytes) {
        tempBuffer = new Uint8Array(segmentObj.bytes);

        // Combine the individual segments into one large typed-array
        segmentObj.segments.forEach(function (segment) {
          tempBuffer.set(segment, offset);
          offset += segment.byteLength;
        });

        try {
          destinationBuffer.updating = true;
          destinationBuffer.appendBuffer(tempBuffer);
        } catch (error) {
          if (this.mediaSource_.player_) {
            this.mediaSource_.player_.error({
              code: -3,
              type: 'APPEND_BUFFER_ERR',
              message: error.message,
              originalError: error
            });
          }
        }
      }
    };

    /**
     * Emulate the native mediasource function. abort any soureBuffer
     * actions and throw out any un-appended data.
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/abort
     */


    VirtualSourceBuffer.prototype.abort = function abort() {
      if (this.videoBuffer_) {
        this.videoBuffer_.abort();
      }
      if (!this.audioDisabled_ && this.audioBuffer_) {
        this.audioBuffer_.abort();
      }
      if (this.transmuxer_) {
        this.transmuxer_.postMessage({action: 'reset'});
      }
      this.pendingBuffers_.length = 0;
      this.bufferUpdating_ = false;
    };

    return VirtualSourceBuffer;
  }(videojs$1.EventTarget);

  /**
   * @file html-media-source.js
   */

  /**
   * Our MediaSource implementation in HTML, mimics native
   * MediaSource where/if possible.
   *
   * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource
   * @class HtmlMediaSource
   * @extends videojs.EventTarget
   */


  var HtmlMediaSource = function (_videojs$EventTarget2) {
    inherits(HtmlMediaSource, _videojs$EventTarget2);

    function HtmlMediaSource() {
      classCallCheck(this, HtmlMediaSource);

      var _this9 = possibleConstructorReturn(this, _videojs$EventTarget2.call(this));

      var property = void 0;

      _this9.nativeMediaSource_ = new window_1.MediaSource();
      // delegate to the native MediaSource's methods by default
      for (property in _this9.nativeMediaSource_) {
        if (!(property in HtmlMediaSource.prototype) && typeof _this9.nativeMediaSource_[property] === 'function') {
          _this9[property] = _this9.nativeMediaSource_[property].bind(_this9.nativeMediaSource_);
        }
      }

      // emulate `duration` and `seekable` until seeking can be
      // handled uniformly for live streams
      // see https://github.com/w3c/media-source/issues/5
      _this9.duration_ = NaN;
      Object.defineProperty(_this9, 'duration', {
        get: function get$$1() {
          if (this.duration_ === Infinity) {
            return this.duration_;
          }
          return this.nativeMediaSource_.duration;
        },
        set: function set$$1(duration) {
          this.duration_ = duration;
          if (duration !== Infinity) {
            this.nativeMediaSource_.duration = duration;
            return;
          }
        }
      });
      Object.defineProperty(_this9, 'seekable', {
        get: function get$$1() {
          if (this.duration_ === Infinity) {
            return videojs$1.createTimeRanges([[0, this.nativeMediaSource_.duration]]);
          }
          return this.nativeMediaSource_.seekable;
        }
      });

      Object.defineProperty(_this9, 'readyState', {
        get: function get$$1() {
          return this.nativeMediaSource_.readyState;
        }
      });

      Object.defineProperty(_this9, 'activeSourceBuffers', {
        get: function get$$1() {
          return this.activeSourceBuffers_;
        }
      });

      // the list of virtual and native SourceBuffers created by this
      // MediaSource
      _this9.sourceBuffers = [];

      _this9.activeSourceBuffers_ = [];

      /**
       * update the list of active source buffers based upon various
       * imformation from HLS and video.js
       *
       * @private
       */
      _this9.updateActiveSourceBuffers_ = function () {
        // Retain the reference but empty the array
        _this9.activeSourceBuffers_.length = 0;

        // If there is only one source buffer, then it will always be active and audio will
        // be disabled based on the codec of the source buffer
        if (_this9.sourceBuffers.length === 1) {
          var sourceBuffer = _this9.sourceBuffers[0];

          sourceBuffer.appendAudioInitSegment_ = true;
          sourceBuffer.audioDisabled_ = !sourceBuffer.audioCodec_;
          _this9.activeSourceBuffers_.push(sourceBuffer);
          return;
        }

        // There are 2 source buffers, a combined (possibly video only) source buffer and
        // and an audio only source buffer.
        // By default, the audio in the combined virtual source buffer is enabled
        // and the audio-only source buffer (if it exists) is disabled.
        var disableCombined = false;
        var disableAudioOnly = true;

        // TODO: maybe we can store the sourcebuffers on the track objects?
        // safari may do something like this
        for (var i = 0; i < _this9.player_.audioTracks().length; i++) {
          var track = _this9.player_.audioTracks()[i];

          if (track.enabled && track.kind !== 'main') {
            // The enabled track is an alternate audio track so disable the audio in
            // the combined source buffer and enable the audio-only source buffer.
            disableCombined = true;
            disableAudioOnly = false;
            break;
          }
        }

        _this9.sourceBuffers.forEach(function (sourceBuffer, index) {
          /* eslinst-disable */
          // TODO once codecs are required, we can switch to using the codecs to determine
          //      what stream is the video stream, rather than relying on videoTracks
          /* eslinst-enable */

          sourceBuffer.appendAudioInitSegment_ = true;

          if (sourceBuffer.videoCodec_ && sourceBuffer.audioCodec_) {
            // combined
            sourceBuffer.audioDisabled_ = disableCombined;
          } else if (sourceBuffer.videoCodec_ && !sourceBuffer.audioCodec_) {
            // If the "combined" source buffer is video only, then we do not want
            // disable the audio-only source buffer (this is mostly for demuxed
            // audio and video hls)
            sourceBuffer.audioDisabled_ = true;
            disableAudioOnly = false;
          } else if (!sourceBuffer.videoCodec_ && sourceBuffer.audioCodec_) {
            // audio only
            // In the case of audio only with alternate audio and disableAudioOnly is true
            // this means we want to disable the audio on the alternate audio sourcebuffer
            // but not the main "combined" source buffer. The "combined" source buffer is
            // always at index 0, so this ensures audio won't be disabled in both source
            // buffers.
            sourceBuffer.audioDisabled_ = index ? disableAudioOnly : !disableAudioOnly;
            if (sourceBuffer.audioDisabled_) {
              return;
            }
          }

          _this9.activeSourceBuffers_.push(sourceBuffer);
        });
      };

      _this9.onPlayerMediachange_ = function () {
        _this9.sourceBuffers.forEach(function (sourceBuffer) {
          sourceBuffer.appendAudioInitSegment_ = true;
        });
      };

      _this9.onHlsReset_ = function () {
        _this9.sourceBuffers.forEach(function (sourceBuffer) {
          if (sourceBuffer.transmuxer_) {
            sourceBuffer.transmuxer_.postMessage({action: 'resetCaptions'});
          }
        });
      };

      _this9.onHlsSegmentTimeMapping_ = function (event) {
        _this9.sourceBuffers.forEach(function (buffer) {
          return buffer.timeMapping_ = event.mapping;
        });
      };

      // Re-emit MediaSource events on the polyfill
      ['sourceopen', 'sourceclose', 'sourceended'].forEach(function (eventName) {
        this.nativeMediaSource_.addEventListener(eventName, this.trigger.bind(this));
      }, _this9);

      // capture the associated player when the MediaSource is
      // successfully attached
      _this9.on('sourceopen', function (event) {
        // Get the player this MediaSource is attached to
        var video = document_1.querySelector('[src="' + _this9.url_ + '"]');

        if (!video) {
          return;
        }

        _this9.player_ = videojs$1(video.parentNode);

        // hls-reset is fired by videojs.Hls on to the tech after the main SegmentLoader
        // resets its state and flushes the buffer
        _this9.player_.tech_.on('hls-reset', _this9.onHlsReset_);
        // hls-segment-time-mapping is fired by videojs.Hls on to the tech after the main
        // SegmentLoader inspects an MTS segment and has an accurate stream to display
        // time mapping
        _this9.player_.tech_.on('hls-segment-time-mapping', _this9.onHlsSegmentTimeMapping_);

        if (_this9.player_.audioTracks && _this9.player_.audioTracks()) {
          _this9.player_.audioTracks().on('change', _this9.updateActiveSourceBuffers_);
          _this9.player_.audioTracks().on('addtrack', _this9.updateActiveSourceBuffers_);
          _this9.player_.audioTracks().on('removetrack', _this9.updateActiveSourceBuffers_);
        }

        _this9.player_.on('mediachange', _this9.onPlayerMediachange_);
      });

      _this9.on('sourceended', function (event) {
        var duration = durationOfVideo(_this9.duration);

        for (var i = 0; i < _this9.sourceBuffers.length; i++) {
          var sourcebuffer = _this9.sourceBuffers[i];
          var cues = sourcebuffer.metadataTrack_ && sourcebuffer.metadataTrack_.cues;

          if (cues && cues.length) {
            cues[cues.length - 1].endTime = duration;
          }
        }
      });

      // explicitly terminate any WebWorkers that were created
      // by SourceHandlers
      _this9.on('sourceclose', function (event) {
        this.sourceBuffers.forEach(function (sourceBuffer) {
          if (sourceBuffer.transmuxer_) {
            sourceBuffer.transmuxer_.terminate();
          }
        });

        this.sourceBuffers.length = 0;
        if (!this.player_) {
          return;
        }

        if (this.player_.audioTracks && this.player_.audioTracks()) {
          this.player_.audioTracks().off('change', this.updateActiveSourceBuffers_);
          this.player_.audioTracks().off('addtrack', this.updateActiveSourceBuffers_);
          this.player_.audioTracks().off('removetrack', this.updateActiveSourceBuffers_);
        }

        // We can only change this if the player hasn't been disposed of yet
        // because `off` eventually tries to use the el_ property. If it has
        // been disposed of, then don't worry about it because there are no
        // event handlers left to unbind anyway
        if (this.player_.el_) {
          this.player_.off('mediachange', this.onPlayerMediachange_);
          this.player_.tech_.off('hls-reset', this.onHlsReset_);
          this.player_.tech_.off('hls-segment-time-mapping', this.onHlsSegmentTimeMapping_);
        }
      });
      return _this9;
    }

    /**
     * Add a range that that can now be seeked to.
     *
     * @param {Double} start where to start the addition
     * @param {Double} end where to end the addition
     * @private
     */


    HtmlMediaSource.prototype.addSeekableRange_ = function addSeekableRange_(start, end) {
      var error = void 0;

      if (this.duration !== Infinity) {
        error = new Error('MediaSource.addSeekableRange() can only be invoked ' + 'when the duration is Infinity');
        error.name = 'InvalidStateError';
        error.code = 11;
        throw error;
      }

      if (end > this.nativeMediaSource_.duration || isNaN(this.nativeMediaSource_.duration)) {
        this.nativeMediaSource_.duration = end;
      }
    };

    /**
     * Add a source buffer to the media source.
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/addSourceBuffer
     * @param {String} type the content-type of the content
     * @return {Object} the created source buffer
     */


    HtmlMediaSource.prototype.addSourceBuffer = function addSourceBuffer(type) {
      var buffer = void 0;
      var parsedType = parseContentType(type);

      // Create a VirtualSourceBuffer to transmux MPEG-2 transport
      // stream segments into fragmented MP4s
      if (/^(video|audio)\/mp2t$/i.test(parsedType.type)) {
        var codecs = [];

        if (parsedType.parameters && parsedType.parameters.codecs) {
          codecs = parsedType.parameters.codecs.split(',');
          codecs = translateLegacyCodecs(codecs);
          codecs = codecs.filter(function (codec) {
            return isAudioCodec(codec) || isVideoCodec(codec);
          });
        }

        if (codecs.length === 0) {
          codecs = ['avc1.4d400d', 'mp4a.40.2'];
        }

        buffer = new VirtualSourceBuffer(this, codecs);

        if (this.sourceBuffers.length !== 0) {
          // If another VirtualSourceBuffer already exists, then we are creating a
          // SourceBuffer for an alternate audio track and therefore we know that
          // the source has both an audio and video track.
          // That means we should trigger the manual creation of the real
          // SourceBuffers instead of waiting for the transmuxer to return data
          this.sourceBuffers[0].createRealSourceBuffers_();
          buffer.createRealSourceBuffers_();

          // Automatically disable the audio on the first source buffer if
          // a second source buffer is ever created
          this.sourceBuffers[0].audioDisabled_ = true;
        }
      } else {
        // delegate to the native implementation
        buffer = this.nativeMediaSource_.addSourceBuffer(type);
      }

      this.sourceBuffers.push(buffer);
      return buffer;
    };

    return HtmlMediaSource;
  }(videojs$1.EventTarget);

  /**
   * @file videojs-contrib-media-sources.js
   */


  var urlCount = 0;

  // ------------
  // Media Source
  // ------------

  // store references to the media sources so they can be connected
  // to a video element (a swf object)
  // TODO: can we store this somewhere local to this module?
  videojs$1.mediaSources = {};

  /**
   * Provide a method for a swf object to notify JS that a
   * media source is now open.
   *
   * @param {String} msObjectURL string referencing the MSE Object URL
   * @param {String} swfId the swf id
   */
  var open = function open(msObjectURL, swfId) {
    var mediaSource = videojs$1.mediaSources[msObjectURL];

    if (mediaSource) {
      mediaSource.trigger({type: 'sourceopen', swfId: swfId});
    } else {
      throw new Error('Media Source not found (Video.js)');
    }
  };

  /**
   * Check to see if the native MediaSource object exists and supports
   * an MP4 container with both H.264 video and AAC-LC audio.
   *
   * @return {Boolean} if  native media sources are supported
   */
  var supportsNativeMediaSources = function supportsNativeMediaSources() {
    return !!window_1.MediaSource && !!window_1.MediaSource.isTypeSupported && window_1.MediaSource.isTypeSupported('video/mp4;codecs="avc1.4d400d,mp4a.40.2"');
  };

  /**
   * An emulation of the MediaSource API so that we can support
   * native and non-native functionality. returns an instance of
   * HtmlMediaSource.
   *
   * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/MediaSource
   */
  var MediaSource = function MediaSource() {
    this.MediaSource = {
      open: open,
      supportsNativeMediaSources: supportsNativeMediaSources
    };

    if (supportsNativeMediaSources()) {
      return new HtmlMediaSource();
    }

    throw new Error('Cannot use create a virtual MediaSource for this video');
  };

  MediaSource.open = open;
  MediaSource.supportsNativeMediaSources = supportsNativeMediaSources;

  /**
   * A wrapper around the native URL for our MSE object
   * implementation, this object is exposed under videojs.URL
   *
   * @link https://developer.mozilla.org/en-US/docs/Web/API/URL/URL
   */
  var URL$1 = {
    /**
     * A wrapper around the native createObjectURL for our objects.
     * This function maps a native or emulated mediaSource to a blob
     * url so that it can be loaded into video.js
     *
     * @link https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
     * @param {MediaSource} object the object to create a blob url to
     */
    createObjectURL: function createObjectURL(object) {
      var objectUrlPrefix = 'blob:vjs-media-source/';
      var url = void 0;

      // use the native MediaSource to generate an object URL
      if (object instanceof HtmlMediaSource) {
        url = window_1.URL.createObjectURL(object.nativeMediaSource_);
        object.url_ = url;
        return url;
      }
      // if the object isn't an emulated MediaSource, delegate to the
      // native implementation
      if (!(object instanceof HtmlMediaSource)) {
        url = window_1.URL.createObjectURL(object);
        object.url_ = url;
        return url;
      }

      // build a URL that can be used to map back to the emulated
      // MediaSource
      url = objectUrlPrefix + urlCount;

      urlCount++;

      // setup the mapping back to object
      videojs$1.mediaSources[url] = object;

      return url;
    }
  };

  videojs$1.MediaSource = MediaSource;
  videojs$1.URL = URL$1;

  var EventTarget$1$1 = videojs$1.EventTarget,
    mergeOptions$2 = videojs$1.mergeOptions;

  /**
   * Returns a new master manifest that is the result of merging an updated master manifest
   * into the original version.
   *
   * @param {Object} oldMaster
   *        The old parsed mpd object
   * @param {Object} newMaster
   *        The updated parsed mpd object
   * @return {Object}
   *         A new object representing the original master manifest with the updated media
   *         playlists merged in
   */

  var updateMaster$1 = function updateMaster$1(oldMaster, newMaster) {
    var update = mergeOptions$2(oldMaster, {
      // These are top level properties that can be updated
      duration: newMaster.duration,
      minimumUpdatePeriod: newMaster.minimumUpdatePeriod
    });

    // First update the playlists in playlist list
    for (var i = 0; i < newMaster.playlists.length; i++) {
      var playlistUpdate = updateMaster(update, newMaster.playlists[i]);

      if (playlistUpdate) {
        update = playlistUpdate;
      }
    }

    // Then update media group playlists
    forEachMediaGroup(newMaster, function (properties, type, group, label) {
      if (properties.playlists && properties.playlists.length) {
        var uri = properties.playlists[0].uri;
        var _playlistUpdate = updateMaster(update, properties.playlists[0]);

        if (_playlistUpdate) {
          update = _playlistUpdate;
          // update the playlist reference within media groups
          update.mediaGroups[type][group][label].playlists[0] = update.playlists[uri];
        }
      }
    });

    return update;
  };

  var DashPlaylistLoader = function (_EventTarget$) {
    inherits(DashPlaylistLoader, _EventTarget$);

    // DashPlaylistLoader must accept either a src url or a playlist because subsequent
    // playlist loader setups from media groups will expect to be able to pass a playlist
    // (since there aren't external URLs to media playlists with DASH)
    function DashPlaylistLoader(srcUrlOrPlaylist, hls, withCredentials, masterPlaylistLoader) {
      classCallCheck(this, DashPlaylistLoader);

      var _this10 = possibleConstructorReturn(this, _EventTarget$.call(this));

      _this10.hls_ = hls;
      _this10.withCredentials = withCredentials;

      if (!srcUrlOrPlaylist) {
        throw new Error('A non-empty playlist URL or playlist is required');
      }

      // event naming?
      _this10.on('minimumUpdatePeriod', function () {
        _this10.refreshXml_();
      });

      // live playlist staleness timeout
      _this10.on('mediaupdatetimeout', function () {
        _this10.refreshMedia_();
      });

      // initialize the loader state
      if (typeof srcUrlOrPlaylist === 'string') {
        _this10.srcUrl = srcUrlOrPlaylist;
        _this10.state = 'HAVE_NOTHING';
        return possibleConstructorReturn(_this10);
      }

      _this10.masterPlaylistLoader_ = masterPlaylistLoader;

      _this10.state = 'HAVE_METADATA';
      _this10.started = true;
      // we only should have one playlist so select it
      _this10.media(srcUrlOrPlaylist);
      // trigger async to mimic behavior of HLS, where it must request a playlist
      window_1.setTimeout(function () {
        _this10.trigger('loadedmetadata');
      }, 0);
      return _this10;
    }

    DashPlaylistLoader.prototype.dispose = function dispose() {
      this.stopRequest();
      window_1.clearTimeout(this.mediaUpdateTimeout);
    };

    DashPlaylistLoader.prototype.stopRequest = function stopRequest() {
      if (this.request) {
        var oldRequest = this.request;

        this.request = null;
        oldRequest.onreadystatechange = null;
        oldRequest.abort();
      }
    };

    DashPlaylistLoader.prototype.media = function media(playlist) {
      // getter
      if (!playlist) {
        return this.media_;
      }

      // setter
      if (this.state === 'HAVE_NOTHING') {
        throw new Error('Cannot switch media playlist from ' + this.state);
      }

      var startingState = this.state;

      // find the playlist object if the target playlist has been specified by URI
      if (typeof playlist === 'string') {
        if (!this.master.playlists[playlist]) {
          throw new Error('Unknown playlist URI: ' + playlist);
        }
        playlist = this.master.playlists[playlist];
      }

      var mediaChange = !this.media_ || playlist.uri !== this.media_.uri;

      this.state = 'HAVE_METADATA';

      // switching to the active playlist is a no-op
      if (!mediaChange) {
        return;
      }

      // switching from an already loaded playlist
      if (this.media_) {
        this.trigger('mediachanging');
      }

      this.media_ = playlist;

      this.refreshMedia_();

      // trigger media change if the active media has been updated
      if (startingState !== 'HAVE_MASTER') {
        this.trigger('mediachange');
      }
    };

    DashPlaylistLoader.prototype.pause = function pause() {
      this.stopRequest();
      if (this.state === 'HAVE_NOTHING') {
        // If we pause the loader before any data has been retrieved, its as if we never
        // started, so reset to an unstarted state.
        this.started = false;
      }
    };

    DashPlaylistLoader.prototype.load = function load() {
      // because the playlists are internal to the manifest, load should either load the
      // main manifest, or do nothing but trigger an event
      if (!this.started) {
        this.start();
        return;
      }

      this.trigger('loadedplaylist');
    };

    /**
     * Parses the master xml string and updates playlist uri references
     *
     * @return {Object}
     *         The parsed mpd manifest object
     */


    DashPlaylistLoader.prototype.parseMasterXml = function parseMasterXml() {
      var master = parse(this.masterXml_, {
        manifestUri: this.srcUrl,
        clientOffset: this.clientOffset_
      });

      master.uri = this.srcUrl;

      // Set up phony URIs for the playlists since we won't have external URIs for DASH
      // but reference playlists by their URI throughout the project
      // TODO: Should we create the dummy uris in mpd-parser as well (leaning towards yes).
      for (var i = 0; i < master.playlists.length; i++) {
        var phonyUri = 'placeholder-uri-' + i;

        master.playlists[i].uri = phonyUri;
        // set up by URI references
        master.playlists[phonyUri] = master.playlists[i];
      }

      // set up phony URIs for the media group playlists since we won't have external
      // URIs for DASH but reference playlists by their URI throughout the project
      forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {
        if (properties.playlists && properties.playlists.length) {
          var _phonyUri = 'placeholder-uri-' + mediaType + '-' + groupKey + '-' + labelKey;

          properties.playlists[0].uri = _phonyUri;
          // setup URI references
          master.playlists[_phonyUri] = properties.playlists[0];
        }
      });

      setupMediaPlaylists(master);
      resolveMediaGroupUris(master);

      return master;
    };

    DashPlaylistLoader.prototype.start = function start() {
      var _this11 = this;

      this.started = true;

      // request the specified URL
      this.request = this.hls_.xhr({
        uri: this.srcUrl,
        withCredentials: this.withCredentials
      }, function (error, req) {
        // disposed
        if (!_this11.request) {
          return;
        }

        // clear the loader's request reference
        _this11.request = null;

        if (error) {
          _this11.error = {
            status: req.status,
            message: 'DASH playlist request error at URL: ' + _this11.srcUrl,
            responseText: req.responseText,
            // MEDIA_ERR_NETWORK
            code: 2
          };
          if (_this11.state === 'HAVE_NOTHING') {
            _this11.started = false;
          }
          return _this11.trigger('error');
        }

        _this11.masterXml_ = req.responseText;

        if (req.responseHeaders && req.responseHeaders.date) {
          _this11.masterLoaded_ = Date.parse(req.responseHeaders.date);
        } else {
          _this11.masterLoaded_ = Date.now();
        }

        _this11.syncClientServerClock_(_this11.onClientServerClockSync_.bind(_this11));
      });
    };

    /**
     * Parses the master xml for UTCTiming node to sync the client clock to the server
     * clock. If the UTCTiming node requires a HEAD or GET request, that request is made.
     *
     * @param {Function} done
     *        Function to call when clock sync has completed
     */


    DashPlaylistLoader.prototype.syncClientServerClock_ = function syncClientServerClock_(done) {
      var _this12 = this;

      var utcTiming = parseUTCTiming(this.masterXml_);

      // No UTCTiming element found in the mpd. Use Date header from mpd request as the
      // server clock
      if (utcTiming === null) {
        this.clientOffset_ = this.masterLoaded_ - Date.now();
        return done();
      }

      if (utcTiming.method === 'DIRECT') {
        this.clientOffset_ = utcTiming.value - Date.now();
        return done();
      }

      this.request = this.hls_.xhr({
        uri: resolveUrl$1(this.srcUrl, utcTiming.value),
        method: utcTiming.method,
        withCredentials: this.withCredentials
      }, function (error, req) {
        // disposed
        if (!_this12.request) {
          return;
        }

        if (error) {
          // sync request failed, fall back to using date header from mpd
          // TODO: log warning
          _this12.clientOffset_ = _this12.masterLoaded_ - Date.now();
          return done();
        }

        var serverTime = void 0;

        if (utcTiming.method === 'HEAD') {
          if (!req.responseHeaders || !req.responseHeaders.date) {
            // expected date header not preset, fall back to using date header from mpd
            // TODO: log warning
            serverTime = _this12.masterLoaded_;
          } else {
            serverTime = Date.parse(req.responseHeaders.date);
          }
        } else {
          serverTime = Date.parse(req.responseText);
        }

        _this12.clientOffset_ = serverTime - Date.now();

        done();
      });
    };

    /**
     * Handler for after client/server clock synchronization has happened. Sets up
     * xml refresh timer if specificed by the manifest.
     */


    DashPlaylistLoader.prototype.onClientServerClockSync_ = function onClientServerClockSync_() {
      var _this13 = this;

      this.master = this.parseMasterXml();

      this.state = 'HAVE_MASTER';

      this.trigger('loadedplaylist');

      if (!this.media_) {
        // no media playlist was specifically selected so start
        // from the first listed one
        this.media(this.master.playlists[0]);
      }
      // trigger loadedmetadata to resolve setup of media groups
      // trigger async to mimic behavior of HLS, where it must request a playlist
      window_1.setTimeout(function () {
        _this13.trigger('loadedmetadata');
      }, 0);

      // TODO: minimumUpdatePeriod can have a value of 0. Currently the manifest will not
      // be refreshed when this is the case. The inter-op guide says that when the
      // minimumUpdatePeriod is 0, the manifest should outline all currently available
      // segments, but future segments may require an update. I think a good solution
      // would be to update the manifest at the same rate that the media playlists
      // are "refreshed", i.e. every targetDuration.
      if (this.master.minimumUpdatePeriod) {
        window_1.setTimeout(function () {
          _this13.trigger('minimumUpdatePeriod');
        }, this.master.minimumUpdatePeriod);
      }
    };

    /**
     * Sends request to refresh the master xml and updates the parsed master manifest
     * TODO: Does the client offset need to be recalculated when the xml is refreshed?
     */


    DashPlaylistLoader.prototype.refreshXml_ = function refreshXml_() {
      var _this14 = this;

      this.request = this.hls_.xhr({
        uri: this.srcUrl,
        withCredentials: this.withCredentials
      }, function (error, req) {
        // disposed
        if (!_this14.request) {
          return;
        }

        // clear the loader's request reference
        _this14.request = null;

        if (error) {
          _this14.error = {
            status: req.status,
            message: 'DASH playlist request error at URL: ' + _this14.srcUrl,
            responseText: req.responseText,
            // MEDIA_ERR_NETWORK
            code: 2
          };
          if (_this14.state === 'HAVE_NOTHING') {
            _this14.started = false;
          }
          return _this14.trigger('error');
        }

        _this14.masterXml_ = req.responseText;

        var newMaster = _this14.parseMasterXml();

        _this14.master = updateMaster$1(_this14.master, newMaster);

        window_1.setTimeout(function () {
          _this14.trigger('minimumUpdatePeriod');
        }, _this14.master.minimumUpdatePeriod);
      });
    };

    /**
     * Refreshes the media playlist by re-parsing the master xml and updating playlist
     * references. If this is an alternate loader, the updated parsed manifest is retrieved
     * from the master loader.
     */


    DashPlaylistLoader.prototype.refreshMedia_ = function refreshMedia_() {
      var _this15 = this;

      var oldMaster = void 0;
      var newMaster = void 0;

      if (this.masterPlaylistLoader_) {
        oldMaster = this.masterPlaylistLoader_.master;
        newMaster = this.masterPlaylistLoader_.parseMasterXml();
      } else {
        oldMaster = this.master;
        newMaster = this.parseMasterXml();
      }

      var updatedMaster = updateMaster$1(oldMaster, newMaster);

      if (updatedMaster) {
        if (this.masterPlaylistLoader_) {
          this.masterPlaylistLoader_.master = updatedMaster;
        } else {
          this.master = updatedMaster;
        }
        this.media_ = updatedMaster.playlists[this.media_.uri];
      } else {
        this.trigger('playlistunchanged');
      }

      if (!this.media().endList) {
        this.mediaUpdateTimeout = window_1.setTimeout(function () {
          _this15.trigger('mediaupdatetimeout');
        }, refreshDelay(this.media(), !!updatedMaster));
      }

      this.trigger('loadedplaylist');
    };

    return DashPlaylistLoader;
  }(EventTarget$1$1);

  var logger = function logger(source) {
    if (videojs$1.log.debug) {
      return videojs$1.log.debug.bind(videojs$1, 'VHS:', source + ' >');
    }

    return function () {
    };
  };

  function noop$1() {
  }

  /**
   * @file source-updater.js
   */

  /**
   * A queue of callbacks to be serialized and applied when a
   * MediaSource and its associated SourceBuffers are not in the
   * updating state. It is used by the segment loader to update the
   * underlying SourceBuffers when new data is loaded, for instance.
   *
   * @class SourceUpdater
   * @param {MediaSource} mediaSource the MediaSource to create the
   * SourceBuffer from
   * @param {String} mimeType the desired MIME type of the underlying
   * SourceBuffer
   * @param {Object} sourceBufferEmitter an event emitter that fires when a source buffer is
   * added to the media source
   */

  var SourceUpdater = function () {
    function SourceUpdater(mediaSource, mimeType, type, sourceBufferEmitter) {
      classCallCheck(this, SourceUpdater);

      this.callbacks_ = [];
      this.pendingCallback_ = null;
      this.timestampOffset_ = 0;
      this.mediaSource = mediaSource;
      this.processedAppend_ = false;
      this.type_ = type;
      this.mimeType_ = mimeType;
      this.logger_ = logger('SourceUpdater[' + type + '][' + mimeType + ']');

      if (mediaSource.readyState === 'closed') {
        mediaSource.addEventListener('sourceopen', this.createSourceBuffer_.bind(this, mimeType, sourceBufferEmitter));
      } else {
        this.createSourceBuffer_(mimeType, sourceBufferEmitter);
      }
    }

    SourceUpdater.prototype.createSourceBuffer_ = function createSourceBuffer_(mimeType, sourceBufferEmitter) {
      var _this16 = this;

      this.sourceBuffer_ = this.mediaSource.addSourceBuffer(mimeType);

      this.logger_('created SourceBuffer');

      if (sourceBufferEmitter) {
        sourceBufferEmitter.trigger('sourcebufferadded');

        if (this.mediaSource.sourceBuffers.length < 2) {
          // There's another source buffer we must wait for before we can start updating
          // our own (or else we can get into a bad state, i.e., appending video/audio data
          // before the other video/audio source buffer is available and leading to a video
          // or audio only buffer).
          sourceBufferEmitter.on('sourcebufferadded', function () {
            _this16.start_();
          });
          return;
        }
      }

      this.start_();
    };

    SourceUpdater.prototype.start_ = function start_() {
      var _this17 = this;

      this.started_ = true;

      // run completion handlers and process callbacks as updateend
      // events fire
      this.onUpdateendCallback_ = function () {
        var pendingCallback = _this17.pendingCallback_;

        _this17.pendingCallback_ = null;

        _this17.logger_('buffered [' + printableRange(_this17.buffered()) + ']');

        if (pendingCallback) {
          pendingCallback();
        }

        _this17.runCallback_();
      };

      this.sourceBuffer_.addEventListener('updateend', this.onUpdateendCallback_);

      this.runCallback_();
    };

    /**
     * Aborts the current segment and resets the segment parser.
     *
     * @param {Function} done function to call when done
     * @see http://w3c.github.io/media-source/#widl-SourceBuffer-abort-void
     */


    SourceUpdater.prototype.abort = function abort(done) {
      var _this18 = this;

      if (this.processedAppend_) {
        this.queueCallback_(function () {
          _this18.sourceBuffer_.abort();
        }, done);
      }
    };

    /**
     * Queue an update to append an ArrayBuffer.
     *
     * @param {ArrayBuffer} bytes
     * @param {Function} done the function to call when done
     * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-appendBuffer-void-ArrayBuffer-data
     */


    SourceUpdater.prototype.appendBuffer = function appendBuffer(bytes, done) {
      var _this19 = this;

      this.processedAppend_ = true;
      this.queueCallback_(function () {
        _this19.sourceBuffer_.appendBuffer(bytes);
      }, done);
    };

    /**
     * Indicates what TimeRanges are buffered in the managed SourceBuffer.
     *
     * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-buffered
     */


    SourceUpdater.prototype.buffered = function buffered() {
      if (!this.sourceBuffer_) {
        return videojs$1.createTimeRanges();
      }
      return this.sourceBuffer_.buffered;
    };

    /**
     * Queue an update to remove a time range from the buffer.
     *
     * @param {Number} start where to start the removal
     * @param {Number} end where to end the removal
     * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end
     */


    SourceUpdater.prototype.remove = function remove(start, end) {
      var _this20 = this;

      if (this.processedAppend_) {
        this.queueCallback_(function () {
          _this20.logger_('remove [' + start + ' => ' + end + ']');
          _this20.sourceBuffer_.remove(start, end);
        }, noop$1);
      }
    };

    /**
     * Whether the underlying sourceBuffer is updating or not
     *
     * @return {Boolean} the updating status of the SourceBuffer
     */


    SourceUpdater.prototype.updating = function updating() {
      return !this.sourceBuffer_ || this.sourceBuffer_.updating || this.pendingCallback_;
    };

    /**
     * Set/get the timestampoffset on the SourceBuffer
     *
     * @return {Number} the timestamp offset
     */


    SourceUpdater.prototype.timestampOffset = function timestampOffset(offset) {
      var _this21 = this;

      if (typeof offset !== 'undefined') {
        this.queueCallback_(function () {
          _this21.sourceBuffer_.timestampOffset = offset;
        });
        this.timestampOffset_ = offset;
      }
      return this.timestampOffset_;
    };

    /**
     * Queue a callback to run
     */


    SourceUpdater.prototype.queueCallback_ = function queueCallback_(callback, done) {
      this.callbacks_.push([callback.bind(this), done]);
      this.runCallback_();
    };

    /**
     * Run a queued callback
     */


    SourceUpdater.prototype.runCallback_ = function runCallback_() {
      var callbacks = void 0;

      if (!this.updating() && this.callbacks_.length && this.started_) {
        callbacks = this.callbacks_.shift();
        this.pendingCallback_ = callbacks[1];
        callbacks[0]();
      }
    };

    /**
     * dispose of the source updater and the underlying sourceBuffer
     */


    SourceUpdater.prototype.dispose = function dispose() {
      this.sourceBuffer_.removeEventListener('updateend', this.onUpdateendCallback_);
      if (this.sourceBuffer_ && this.mediaSource.readyState === 'open') {
        this.sourceBuffer_.abort();
      }
    };

    return SourceUpdater;
  }();

  var Config = {
    GOAL_BUFFER_LENGTH: 30,
    MAX_GOAL_BUFFER_LENGTH: 60,
    GOAL_BUFFER_LENGTH_RATE: 1,
    // A fudge factor to apply to advertised playlist bitrates to account for
    // temporary flucations in client bandwidth
    BANDWIDTH_VARIANCE: 1.2,
    // How much of the buffer must be filled before we consider upswitching
    BUFFER_LOW_WATER_LINE: 0,
    MAX_BUFFER_LOW_WATER_LINE: 30,
    BUFFER_LOW_WATER_LINE_RATE: 1
  };

  var REQUEST_ERRORS = {
    FAILURE: 2,
    TIMEOUT: -101,
    ABORTED: -102
  };

  /**
   * Turns segment byterange into a string suitable for use in
   * HTTP Range requests
   *
   * @param {Object} byterange - an object with two values defining the start and end
   *                             of a byte-range
   */
  var byterangeStr = function byterangeStr(byterange) {
    var byterangeStart = void 0;
    var byterangeEnd = void 0;

    // `byterangeEnd` is one less than `offset + length` because the HTTP range
    // header uses inclusive ranges
    byterangeEnd = byterange.offset + byterange.length - 1;
    byterangeStart = byterange.offset;
    return 'bytes=' + byterangeStart + '-' + byterangeEnd;
  };

  /**
   * Defines headers for use in the xhr request for a particular segment.
   *
   * @param {Object} segment - a simplified copy of the segmentInfo object
   *                           from SegmentLoader
   */
  var segmentXhrHeaders = function segmentXhrHeaders(segment) {
    var headers = {};

    if (segment.byterange) {
      headers.Range = byterangeStr(segment.byterange);
    }
    return headers;
  };

  /**
   * Abort all requests
   *
   * @param {Object} activeXhrs - an object that tracks all XHR requests
   */
  var abortAll = function abortAll(activeXhrs) {
    activeXhrs.forEach(function (xhr) {
      xhr.abort();
    });
  };

  /**
   * Gather important bandwidth stats once a request has completed
   *
   * @param {Object} request - the XHR request from which to gather stats
   */
  var getRequestStats = function getRequestStats(request) {
    return {
      bandwidth: request.bandwidth,
      bytesReceived: request.bytesReceived || 0,
      roundTripTime: request.roundTripTime || 0
    };
  };

  /**
   * If possible gather bandwidth stats as a request is in
   * progress
   *
   * @param {Event} progressEvent - an event object from an XHR's progress event
   */
  var getProgressStats = function getProgressStats(progressEvent) {
    var request = progressEvent.target;
    var roundTripTime = Date.now() - request.requestTime;
    var stats = {
      bandwidth: Infinity,
      bytesReceived: 0,
      roundTripTime: roundTripTime || 0
    };

    stats.bytesReceived = progressEvent.loaded;
    // This can result in Infinity if stats.roundTripTime is 0 but that is ok
    // because we should only use bandwidth stats on progress to determine when
    // abort a request early due to insufficient bandwidth
    stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000);

    return stats;
  };

  /**
   * Handle all error conditions in one place and return an object
   * with all the information
   *
   * @param {Error|null} error - if non-null signals an error occured with the XHR
   * @param {Object} request -  the XHR request that possibly generated the error
   */
  var handleErrors = function handleErrors(error, request) {
    if (request.timedout) {
      return {
        status: request.status,
        message: 'HLS request timed-out at URL: ' + request.uri,
        code: REQUEST_ERRORS.TIMEOUT,
        xhr: request
      };
    }

    if (request.aborted) {
      return {
        status: request.status,
        message: 'HLS request aborted at URL: ' + request.uri,
        code: REQUEST_ERRORS.ABORTED,
        xhr: request
      };
    }

    if (error) {
      return {
        status: request.status,
        message: 'HLS request errored at URL: ' + request.uri,
        code: REQUEST_ERRORS.FAILURE,
        xhr: request
      };
    }

    return null;
  };

  /**
   * Handle responses for key data and convert the key data to the correct format
   * for the decryption step later
   *
   * @param {Object} segment - a simplified copy of the segmentInfo object
   *                           from SegmentLoader
   * @param {Function} finishProcessingFn - a callback to execute to continue processing
   *                                        this request
   */
  var handleKeyResponse = function handleKeyResponse(segment, finishProcessingFn) {
    return function (error, request) {
      var response = request.response;
      var errorObj = handleErrors(error, request);

      if (errorObj) {
        return finishProcessingFn(errorObj, segment);
      }

      if (response.byteLength !== 16) {
        return finishProcessingFn({
          status: request.status,
          message: 'Invalid HLS key at URL: ' + request.uri,
          code: REQUEST_ERRORS.FAILURE,
          xhr: request
        }, segment);
      }

      var view = new DataView(response);

      segment.key.bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]);
      return finishProcessingFn(null, segment);
    };
  };

  /**
   * Handle init-segment responses
   *
   * @param {Object} segment - a simplified copy of the segmentInfo object
   *                           from SegmentLoader
   * @param {Function} finishProcessingFn - a callback to execute to continue processing
   *                                        this request
   */
  var handleInitSegmentResponse = function handleInitSegmentResponse(segment, finishProcessingFn) {
    return function (error, request) {
      var response = request.response;
      var errorObj = handleErrors(error, request);

      if (errorObj) {
        return finishProcessingFn(errorObj, segment);
      }

      // stop processing if received empty content
      if (response.byteLength === 0) {
        return finishProcessingFn({
          status: request.status,
          message: 'Empty HLS segment content at URL: ' + request.uri,
          code: REQUEST_ERRORS.FAILURE,
          xhr: request
        }, segment);
      }

      segment.map.bytes = new Uint8Array(request.response);
      return finishProcessingFn(null, segment);
    };
  };

  /**
   * Response handler for segment-requests being sure to set the correct
   * property depending on whether the segment is encryped or not
   * Also records and keeps track of stats that are used for ABR purposes
   *
   * @param {Object} segment - a simplified copy of the segmentInfo object
   *                           from SegmentLoader
   * @param {Function} finishProcessingFn - a callback to execute to continue processing
   *                                        this request
   */
  var handleSegmentResponse = function handleSegmentResponse(segment, finishProcessingFn) {
    return function (error, request) {
      var response = request.response;
      var errorObj = handleErrors(error, request);

      if (errorObj) {
        return finishProcessingFn(errorObj, segment);
      }

      // stop processing if received empty content
      if (response.byteLength === 0) {
        return finishProcessingFn({
          status: request.status,
          message: 'Empty HLS segment content at URL: ' + request.uri,
          code: REQUEST_ERRORS.FAILURE,
          xhr: request
        }, segment);
      }

      segment.stats = getRequestStats(request);

      if (segment.key) {
        segment.encryptedBytes = new Uint8Array(request.response);
      } else {
        segment.bytes = new Uint8Array(request.response);
      }

      return finishProcessingFn(null, segment);
    };
  };

  /**
   * Decrypt the segment via the decryption web worker
   *
   * @param {WebWorker} decrypter - a WebWorker interface to AES-128 decryption routines
   * @param {Object} segment - a simplified copy of the segmentInfo object
   *                           from SegmentLoader
   * @param {Function} doneFn - a callback that is executed after decryption has completed
   */
  var decryptSegment = function decryptSegment(decrypter, segment, doneFn) {
    var decryptionHandler = function decryptionHandler(event) {
      if (event.data.source === segment.requestId) {
        decrypter.removeEventListener('message', decryptionHandler);
        var decrypted = event.data.decrypted;

        segment.bytes = new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength);
        return doneFn(null, segment);
      }
    };

    decrypter.addEventListener('message', decryptionHandler);

    // this is an encrypted segment
    // incrementally decrypt the segment
    decrypter.postMessage(createTransferableMessage({
      source: segment.requestId,
      encrypted: segment.encryptedBytes,
      key: segment.key.bytes,
      iv: segment.key.iv
    }), [segment.encryptedBytes.buffer, segment.key.bytes.buffer]);
  };

  /**
   * The purpose of this function is to get the most pertinent error from the
   * array of errors.
   * For instance if a timeout and two aborts occur, then the aborts were
   * likely triggered by the timeout so return that error object.
   */
  var getMostImportantError = function getMostImportantError(errors) {
    return errors.reduce(function (prev, err) {
      return err.code > prev.code ? err : prev;
    });
  };

  /**
   * This function waits for all XHRs to finish (with either success or failure)
   * before continueing processing via it's callback. The function gathers errors
   * from each request into a single errors array so that the error status for
   * each request can be examined later.
   *
   * @param {Object} activeXhrs - an object that tracks all XHR requests
   * @param {WebWorker} decrypter - a WebWorker interface to AES-128 decryption routines
   * @param {Function} doneFn - a callback that is executed after all resources have been
   *                            downloaded and any decryption completed
   */
  var waitForCompletion = function waitForCompletion(activeXhrs, decrypter, doneFn) {
    var errors = [];
    var count = 0;

    return function (error, segment) {
      if (error) {
        // If there are errors, we have to abort any outstanding requests
        abortAll(activeXhrs);
        errors.push(error);
      }
      count += 1;

      if (count === activeXhrs.length) {
        // Keep track of when *all* of the requests have completed
        segment.endOfAllRequests = Date.now();

        if (errors.length > 0) {
          var worstError = getMostImportantError(errors);

          return doneFn(worstError, segment);
        }
        if (segment.encryptedBytes) {
          return decryptSegment(decrypter, segment, doneFn);
        }
        // Otherwise, everything is ready just continue
        return doneFn(null, segment);
      }
    };
  };

  /**
   * Simple progress event callback handler that gathers some stats before
   * executing a provided callback with the `segment` object
   *
   * @param {Object} segment - a simplified copy of the segmentInfo object
   *                           from SegmentLoader
   * @param {Function} progressFn - a callback that is executed each time a progress event
   *                                is received
   * @param {Event} event - the progress event object from XMLHttpRequest
   */
  var handleProgress = function handleProgress(segment, progressFn) {
    return function (event) {
      segment.stats = videojs$1.mergeOptions(segment.stats, getProgressStats(event));

      // record the time that we receive the first byte of data
      if (!segment.stats.firstBytesReceivedAt && segment.stats.bytesReceived) {
        segment.stats.firstBytesReceivedAt = Date.now();
      }

      return progressFn(event, segment);
    };
  };

  /**
   * Load all resources and does any processing necessary for a media-segment
   *
   * Features:
   *   decrypts the media-segment if it has a key uri and an iv
   *   aborts *all* requests if *any* one request fails
   *
   * The segment object, at minimum, has the following format:
   * {
   *   resolvedUri: String,
   *   [byterange]: {
   *     offset: Number,
   *     length: Number
   *   },
   *   [key]: {
   *     resolvedUri: String
   *     [byterange]: {
   *       offset: Number,
   *       length: Number
   *     },
   *     iv: {
   *       bytes: Uint32Array
   *     }
   *   },
   *   [map]: {
   *     resolvedUri: String,
   *     [byterange]: {
   *       offset: Number,
   *       length: Number
   *     },
   *     [bytes]: Uint8Array
   *   }
   * }
   * ...where [name] denotes optional properties
   *
   * @param {Function} xhr - an instance of the xhr wrapper in xhr.js
   * @param {Object} xhrOptions - the base options to provide to all xhr requests
   * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128
   *                                       decryption routines
   * @param {Object} segment - a simplified copy of the segmentInfo object
   *                           from SegmentLoader
   * @param {Function} progressFn - a callback that receives progress events from the main
   *                                segment's xhr request
   * @param {Function} doneFn - a callback that is executed only once all requests have
   *                            succeeded or failed
   * @returns {Function} a function that, when invoked, immediately aborts all
   *                     outstanding requests
   */
  var mediaSegmentRequest = function mediaSegmentRequest(xhr, xhrOptions, decryptionWorker, segment, progressFn, doneFn) {
    var activeXhrs = [];
    var finishProcessingFn = waitForCompletion(activeXhrs, decryptionWorker, doneFn);

    // optionally, request the decryption key
    if (segment.key) {
      var keyRequestOptions = videojs$1.mergeOptions(xhrOptions, {
        uri: segment.key.resolvedUri,
        responseType: 'arraybuffer'
      });
      var keyRequestCallback = handleKeyResponse(segment, finishProcessingFn);
      var keyXhr = xhr(keyRequestOptions, keyRequestCallback);

      activeXhrs.push(keyXhr);
    }

    // optionally, request the associated media init segment
    if (segment.map && !segment.map.bytes) {
      var initSegmentOptions = videojs$1.mergeOptions(xhrOptions, {
        uri: segment.map.resolvedUri,
        responseType: 'arraybuffer',
        headers: segmentXhrHeaders(segment.map)
      });
      var initSegmentRequestCallback = handleInitSegmentResponse(segment, finishProcessingFn);
      var initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback);

      activeXhrs.push(initSegmentXhr);
    }

    var segmentRequestOptions = videojs$1.mergeOptions(xhrOptions, {
      uri: segment.resolvedUri,
      responseType: 'arraybuffer',
      headers: segmentXhrHeaders(segment)
    });
    var segmentRequestCallback = handleSegmentResponse(segment, finishProcessingFn);
    var segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback);

    segmentXhr.addEventListener('progress', handleProgress(segment, progressFn));
    activeXhrs.push(segmentXhr);

    return function () {
      return abortAll(activeXhrs);
    };
  };

  /**
   * @file - codecs.js - Handles tasks regarding codec strings such as translating them to
   * codec strings, or translating codec strings into objects that can be examined.
   */

    // Default codec parameters if none were provided for video and/or audio
  var defaultCodecs = {
      videoCodec: 'avc1',
      videoObjectTypeIndicator: '.4d400d',
      // AAC-LC
      audioProfile: '2'
    };

  /**
   * Parses a codec string to retrieve the number of codecs specified,
   * the video codec and object type indicator, and the audio profile.
   */

  var parseCodecs = function parseCodecs() {
    var codecs = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';

    var result = {
      codecCount: 0
    };
    var parsed = void 0;

    result.codecCount = codecs.split(',').length;
    result.codecCount = result.codecCount || 2;

    // parse the video codec
    parsed = /(^|\s|,)+(avc[13])([^ ,]*)/i.exec(codecs);
    if (parsed) {
      result.videoCodec = parsed[2];
      result.videoObjectTypeIndicator = parsed[3];
    }

    // parse the last field of the audio codec
    result.audioProfile = /(^|\s|,)+mp4a.[0-9A-Fa-f]+\.([0-9A-Fa-f]+)/i.exec(codecs);
    result.audioProfile = result.audioProfile && result.audioProfile[2];

    return result;
  };

  /**
   * Replace codecs in the codec string with the old apple-style `avc1.<dd>.<dd>` to the
   * standard `avc1.<hhhhhh>`.
   *
   * @param codecString {String} the codec string
   * @return {String} the codec string with old apple-style codecs replaced
   *
   * @private
   */
  var mapLegacyAvcCodecs = function mapLegacyAvcCodecs(codecString) {
    return codecString.replace(/avc1\.(\d+)\.(\d+)/i, function (match) {
      return translateLegacyCodecs([match])[0];
    });
  };

  /**
   * Build a media mime-type string from a set of parameters
   * @param {String} type either 'audio' or 'video'
   * @param {String} container either 'mp2t' or 'mp4'
   * @param {Array} codecs an array of codec strings to add
   * @return {String} a valid media mime-type
   */
  var makeMimeTypeString = function makeMimeTypeString(type, container, codecs) {
    // The codecs array is filtered so that falsey values are
    // dropped and don't cause Array#join to create spurious
    // commas
    return type + '/' + container + '; codecs="' + codecs.filter(function (c) {
      return !!c;
    }).join(', ') + '"';
  };

  /**
   * Returns the type container based on information in the playlist
   * @param {Playlist} media the current media playlist
   * @return {String} a valid media container type
   */
  var getContainerType = function getContainerType(media) {
    // An initialization segment means the media playlist is an iframe
    // playlist or is using the mp4 container. We don't currently
    // support iframe playlists, so assume this is signalling mp4
    // fragments.
    if (media.segments && media.segments.length && media.segments[0].map) {
      return 'mp4';
    }
    return 'mp2t';
  };

  /**
   * Returns a set of codec strings parsed from the playlist or the default
   * codec strings if no codecs were specified in the playlist
   * @param {Playlist} media the current media playlist
   * @return {Object} an object with the video and audio codecs
   */
  var getCodecs = function getCodecs(media) {
    // if the codecs were explicitly specified, use them instead of the
    // defaults
    var mediaAttributes = media.attributes || {};

    if (mediaAttributes.CODECS) {
      return parseCodecs(mediaAttributes.CODECS);
    }
    return defaultCodecs;
  };

  var audioProfileFromDefault = function audioProfileFromDefault(master, audioGroupId) {
    if (!master.mediaGroups.AUDIO || !audioGroupId) {
      return null;
    }

    var audioGroup = master.mediaGroups.AUDIO[audioGroupId];

    if (!audioGroup) {
      return null;
    }

    for (var name in audioGroup) {
      var audioType = audioGroup[name];

      if (audioType.default && audioType.playlists) {
        // codec should be the same for all playlists within the audio type
        return parseCodecs(audioType.playlists[0].attributes.CODECS).audioProfile;
      }
    }

    return null;
  };

  /**
   * Calculates the MIME type strings for a working configuration of
   * SourceBuffers to playOld variant streams in a master playlist. If
   * there is no possible working configuration, an empty array will be
   * returned.
   *
   * @param master {Object} the m3u8 object for the master playlist
   * @param media {Object} the m3u8 object for the variant playlist
   * @return {Array} the MIME type strings. If the array has more than
   * one entry, the first element should be applied to the video
   * SourceBuffer and the second to the audio SourceBuffer.
   *
   * @private
   */
  var mimeTypesForPlaylist = function mimeTypesForPlaylist(master, media) {
    var containerType = getContainerType(media);
    var codecInfo = getCodecs(media);
    var mediaAttributes = media.attributes || {};
    // Default condition for a traditional HLS (no demuxed audio/video)
    var isMuxed = true;
    var isMaat = false;

    if (!media) {
      // Not enough information
      return [];
    }

    if (master.mediaGroups.AUDIO && mediaAttributes.AUDIO) {
      var audioGroup = master.mediaGroups.AUDIO[mediaAttributes.AUDIO];

      // Handle the case where we are in a multiple-audio track scenario
      if (audioGroup) {
        isMaat = true;
        // Start with the everything demuxed then...
        isMuxed = false;
        // ...check to see if any audio group tracks are muxed (ie. lacking a uri)
        for (var groupId in audioGroup) {
          // either a uri is present (if the case of HLS and an external playlist), or
          // playlists is present (in the case of DASH where we don't have external audio
          // playlists)
          if (!audioGroup[groupId].uri && !audioGroup[groupId].playlists) {
            isMuxed = true;
            break;
          }
        }
      }
    }

    // HLS with multiple-audio tracks must always get an audio codec.
    // Put another way, there is no way to have a video-only multiple-audio HLS!
    if (isMaat && !codecInfo.audioProfile) {
      if (!isMuxed) {
        // It is possible for codecs to be specified on the audio media group playlist but
        // not on the rendition playlist. This is mostly the case for DASH, where audio and
        // video are always separate (and separately specified).
        codecInfo.audioProfile = audioProfileFromDefault(master, mediaAttributes.AUDIO);
      }

      if (!codecInfo.audioProfile) {
        videojs$1.log.warn('Multiple audio tracks present but no audio codec string is specified. ' + 'Attempting to use the default audio codec (mp4a.40.2)');
        codecInfo.audioProfile = defaultCodecs.audioProfile;
      }
    }

    // Generate the final codec strings from the codec object generated above
    var codecStrings = {};

    if (codecInfo.videoCodec) {
      codecStrings.video = '' + codecInfo.videoCodec + codecInfo.videoObjectTypeIndicator;
    }

    if (codecInfo.audioProfile) {
      codecStrings.audio = 'mp4a.40.' + codecInfo.audioProfile;
    }

    // Finally, make and return an array with proper mime-types depending on
    // the configuration
    var justAudio = makeMimeTypeString('audio', containerType, [codecStrings.audio]);
    var justVideo = makeMimeTypeString('video', containerType, [codecStrings.video]);
    var bothVideoAudio = makeMimeTypeString('video', containerType, [codecStrings.video, codecStrings.audio]);

    if (isMaat) {
      if (!isMuxed && codecStrings.video) {
        return [justVideo, justAudio];
      }

      if (!isMuxed && !codecStrings.video) {
        // There is no muxed content and no video codec string, so this is an audio only
        // stream with alternate audio.
        return [justAudio, justAudio];
      }

      // There exists the possiblity that this will return a `video/container`
      // mime-type for the first entry in the array even when there is only audio.
      // This doesn't appear to be a problem and simplifies the code.
      return [bothVideoAudio, justAudio];
    }

    // If there is no video codec at all, always just return a single
    // audio/<container> mime-type
    if (!codecStrings.video) {
      return [justAudio];
    }

    // When not using separate audio media groups, audio and video is
    // *always* muxed
    return [bothVideoAudio];
  };

  // Utilities

  /**
   * Returns the CSS value for the specified property on an element
   * using `getComputedStyle`. Firefox has a long-standing issue where
   * getComputedStyle() may return null when running in an iframe with
   * `display: none`.
   *
   * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397
   * @param {HTMLElement} el the htmlelement to work on
   * @param {string} the proprety to get the style for
   */
  var safeGetComputedStyle = function safeGetComputedStyle(el, property) {
    var result = void 0;

    if (!el) {
      return '';
    }

    result = window_1.getComputedStyle(el);
    if (!result) {
      return '';
    }

    return result[property];
  };

  /**
   * Resuable stable sort function
   *
   * @param {Playlists} array
   * @param {Function} sortFn Different comparators
   * @function stableSort
   */
  var stableSort = function stableSort(array, sortFn) {
    var newArray = array.slice();

    array.sort(function (left, right) {
      var cmp = sortFn(left, right);

      if (cmp === 0) {
        return newArray.indexOf(left) - newArray.indexOf(right);
      }
      return cmp;
    });
  };

  /**
   * A comparator function to sort two playlist object by bandwidth.
   *
   * @param {Object} left a media playlist object
   * @param {Object} right a media playlist object
   * @return {Number} Greater than zero if the bandwidth attribute of
   * left is greater than the corresponding attribute of right. Less
   * than zero if the bandwidth of right is greater than left and
   * exactly zero if the two are equal.
   */
  var comparePlaylistBandwidth = function comparePlaylistBandwidth(left, right) {
    var leftBandwidth = void 0;
    var rightBandwidth = void 0;

    if (left.attributes.BANDWIDTH) {
      leftBandwidth = left.attributes.BANDWIDTH;
    }
    leftBandwidth = leftBandwidth || window_1.Number.MAX_VALUE;
    if (right.attributes.BANDWIDTH) {
      rightBandwidth = right.attributes.BANDWIDTH;
    }
    rightBandwidth = rightBandwidth || window_1.Number.MAX_VALUE;

    return leftBandwidth - rightBandwidth;
  };

  /**
   * A comparator function to sort two playlist object by resolution (width).
   * @param {Object} left a media playlist object
   * @param {Object} right a media playlist object
   * @return {Number} Greater than zero if the resolution.width attribute of
   * left is greater than the corresponding attribute of right. Less
   * than zero if the resolution.width of right is greater than left and
   * exactly zero if the two are equal.
   */
  var comparePlaylistResolution = function comparePlaylistResolution(left, right) {
    var leftWidth = void 0;
    var rightWidth = void 0;

    if (left.attributes.RESOLUTION && left.attributes.RESOLUTION.width) {
      leftWidth = left.attributes.RESOLUTION.width;
    }

    leftWidth = leftWidth || window_1.Number.MAX_VALUE;

    if (right.attributes.RESOLUTION && right.attributes.RESOLUTION.width) {
      rightWidth = right.attributes.RESOLUTION.width;
    }

    rightWidth = rightWidth || window_1.Number.MAX_VALUE;

    // NOTE - Fallback to bandwidth sort as appropriate in cases where multiple renditions
    // have the same media dimensions/ resolution
    if (leftWidth === rightWidth && left.attributes.BANDWIDTH && right.attributes.BANDWIDTH) {
      return left.attributes.BANDWIDTH - right.attributes.BANDWIDTH;
    }
    return leftWidth - rightWidth;
  };

  /**
   * Chooses the appropriate media playlist based on bandwidth and player size
   *
   * @param {Object} master
   *        Object representation of the master manifest
   * @param {Number} playerBandwidth
   *        Current calculated bandwidth of the player
   * @param {Number} playerWidth
   *        Current width of the player element
   * @param {Number} playerHeight
   *        Current height of the player element
   * @return {Playlist} the highest bitrate playlist less than the
   * currently detected bandwidth, accounting for some amount of
   * bandwidth variance
   */
  var simpleSelector = function simpleSelector(master, playerBandwidth, playerWidth, playerHeight) {
    // convert the playlists to an intermediary representation to make comparisons easier
    var sortedPlaylistReps = master.playlists.map(function (playlist) {
      var width = void 0;
      var height = void 0;
      var bandwidth = void 0;

      width = playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.width;
      height = playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height;
      bandwidth = playlist.attributes.BANDWIDTH;

      bandwidth = bandwidth || window_1.Number.MAX_VALUE;

      return {
        bandwidth: bandwidth,
        width: width,
        height: height,
        playlist: playlist
      };
    });

    stableSort(sortedPlaylistReps, function (left, right) {
      return left.bandwidth - right.bandwidth;
    });

    // filter out any playlists that have been excluded due to
    // incompatible configurations
    sortedPlaylistReps = sortedPlaylistReps.filter(function (rep) {
      return !Playlist.isIncompatible(rep.playlist);
    });

    // filter out any playlists that have been disabled manually through the representations
    // api or blacklisted temporarily due to playback errors.
    var enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {
      return Playlist.isEnabled(rep.playlist);
    });

    if (!enabledPlaylistReps.length) {
      // if there are no enabled playlists, then they have all been blacklisted or disabled
      // by the user through the representations api. In this case, ignore blacklisting and
      // fallback to what the user wants by using playlists the user has not disabled.
      enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {
        return !Playlist.isDisabled(rep.playlist);
      });
    }

    // filter out any variant that has greater effective bitrate
    // than the current estimated bandwidth
    var bandwidthPlaylistReps = enabledPlaylistReps.filter(function (rep) {
      return rep.bandwidth * Config.BANDWIDTH_VARIANCE < playerBandwidth;
    });

    var highestRemainingBandwidthRep = bandwidthPlaylistReps[bandwidthPlaylistReps.length - 1];

    // get all of the renditions with the same (highest) bandwidth
    // and then taking the very first element
    var bandwidthBestRep = bandwidthPlaylistReps.filter(function (rep) {
      return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;
    })[0];

    // filter out playlists without resolution information
    var haveResolution = bandwidthPlaylistReps.filter(function (rep) {
      return rep.width && rep.height;
    });

    // sort variants by resolution
    stableSort(haveResolution, function (left, right) {
      return left.width - right.width;
    });

    // if we have the exact resolution as the player use it
    var resolutionBestRepList = haveResolution.filter(function (rep) {
      return rep.width === playerWidth && rep.height === playerHeight;
    });

    highestRemainingBandwidthRep = resolutionBestRepList[resolutionBestRepList.length - 1];
    // ensure that we pick the highest bandwidth variant that have exact resolution
    var resolutionBestRep = resolutionBestRepList.filter(function (rep) {
      return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;
    })[0];

    var resolutionPlusOneList = void 0;
    var resolutionPlusOneSmallest = void 0;
    var resolutionPlusOneRep = void 0;

    // find the smallest variant that is larger than the player
    // if there is no match of exact resolution
    if (!resolutionBestRep) {
      resolutionPlusOneList = haveResolution.filter(function (rep) {
        return rep.width > playerWidth || rep.height > playerHeight;
      });

      // find all the variants have the same smallest resolution
      resolutionPlusOneSmallest = resolutionPlusOneList.filter(function (rep) {
        return rep.width === resolutionPlusOneList[0].width && rep.height === resolutionPlusOneList[0].height;
      });

      // ensure that we also pick the highest bandwidth variant that
      // is just-larger-than the video player
      highestRemainingBandwidthRep = resolutionPlusOneSmallest[resolutionPlusOneSmallest.length - 1];
      resolutionPlusOneRep = resolutionPlusOneSmallest.filter(function (rep) {
        return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;
      })[0];
    }

    // fallback chain of variants
    var chosenRep = resolutionPlusOneRep || resolutionBestRep || bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];

    return chosenRep ? chosenRep.playlist : null;
  };

  // Playlist Selectors

  /**
   * Chooses the appropriate media playlist based on the most recent
   * bandwidth estimate and the player size.
   *
   * Expects to be called within the context of an instance of HlsHandler
   *
   * @return {Playlist} the highest bitrate playlist less than the
   * currently detected bandwidth, accounting for some amount of
   * bandwidth variance
   */
  var lastBandwidthSelector = function lastBandwidthSelector() {
    return simpleSelector(this.playlists.master, this.systemBandwidth, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10), parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10));
  };

  /**
   * Chooses the appropriate media playlist based on the potential to rebuffer
   *
   * @param {Object} settings
   *        Object of information required to use this selector
   * @param {Object} settings.master
   *        Object representation of the master manifest
   * @param {Number} settings.currentTime
   *        The current time of the player
   * @param {Number} settings.bandwidth
   *        Current measured bandwidth
   * @param {Number} settings.duration
   *        Duration of the media
   * @param {Number} settings.segmentDuration
   *        Segment duration to be used in round trip time calculations
   * @param {Number} settings.timeUntilRebuffer
   *        Time left in seconds until the player has to rebuffer
   * @param {Number} settings.currentTimeline
   *        The current timeline segments are being loaded from
   * @param {SyncController} settings.syncController
   *        SyncController for determining if we have a sync point for a given playlist
   * @return {Object|null}
   *         {Object} return.playlist
   *         The highest bandwidth playlist with the least amount of rebuffering
   *         {Number} return.rebufferingImpact
   *         The amount of time in seconds switching to this playlist will rebuffer. A
   *         negative value means that switching will cause zero rebuffering.
   */
  var minRebufferMaxBandwidthSelector = function minRebufferMaxBandwidthSelector(settings) {
    var master = settings.master,
      currentTime = settings.currentTime,
      bandwidth = settings.bandwidth,
      duration$$1 = settings.duration,
      segmentDuration = settings.segmentDuration,
      timeUntilRebuffer = settings.timeUntilRebuffer,
      currentTimeline = settings.currentTimeline,
      syncController = settings.syncController;

    // filter out any playlists that have been excluded due to
    // incompatible configurations

    var compatiblePlaylists = master.playlists.filter(function (playlist) {
      return !Playlist.isIncompatible(playlist);
    });

    // filter out any playlists that have been disabled manually through the representations
    // api or blacklisted temporarily due to playback errors.
    var enabledPlaylists = compatiblePlaylists.filter(Playlist.isEnabled);

    if (!enabledPlaylists.length) {
      // if there are no enabled playlists, then they have all been blacklisted or disabled
      // by the user through the representations api. In this case, ignore blacklisting and
      // fallback to what the user wants by using playlists the user has not disabled.
      enabledPlaylists = compatiblePlaylists.filter(function (playlist) {
        return !Playlist.isDisabled(playlist);
      });
    }

    var bandwidthPlaylists = enabledPlaylists.filter(Playlist.hasAttribute.bind(null, 'BANDWIDTH'));

    var rebufferingEstimates = bandwidthPlaylists.map(function (playlist) {
      var syncPoint = syncController.getSyncPoint(playlist, duration$$1, currentTimeline, currentTime);
      // If there is no sync point for this playlist, switching to it will require a
      // sync request first. This will double the request time
      var numRequests = syncPoint ? 1 : 2;
      var requestTimeEstimate = Playlist.estimateSegmentRequestTime(segmentDuration, bandwidth, playlist);
      var rebufferingImpact = requestTimeEstimate * numRequests - timeUntilRebuffer;

      return {
        playlist: playlist,
        rebufferingImpact: rebufferingImpact
      };
    });

    var noRebufferingPlaylists = rebufferingEstimates.filter(function (estimate) {
      return estimate.rebufferingImpact <= 0;
    });

    // Sort by bandwidth DESC
    stableSort(noRebufferingPlaylists, function (a, b) {
      return comparePlaylistBandwidth(b.playlist, a.playlist);
    });

    if (noRebufferingPlaylists.length) {
      return noRebufferingPlaylists[0];
    }

    stableSort(rebufferingEstimates, function (a, b) {
      return a.rebufferingImpact - b.rebufferingImpact;
    });

    return rebufferingEstimates[0] || null;
  };

  /**
   * Chooses the appropriate media playlist, which in this case is the lowest bitrate
   * one with video.  If no renditions with video exist, return the lowest audio rendition.
   *
   * Expects to be called within the context of an instance of HlsHandler
   *
   * @return {Object|null}
   *         {Object} return.playlist
   *         The lowest bitrate playlist that contains a video codec.  If no such rendition
   *         exists pick the lowest audio rendition.
   */
  var lowestBitrateCompatibleVariantSelector = function lowestBitrateCompatibleVariantSelector() {
    // filter out any playlists that have been excluded due to
    // incompatible configurations or playback errors
    var playlists = this.playlists.master.playlists.filter(Playlist.isEnabled);

    // Sort ascending by bitrate
    stableSort(playlists, function (a, b) {
      return comparePlaylistBandwidth(a, b);
    });

    // Parse and assume that playlists with no video codec have no video
    // (this is not necessarily true, although it is generally true).
    //
    // If an entire manifest has no valid videos everything will get filtered
    // out.
    var playlistsWithVideo = playlists.filter(function (playlist) {
      return parseCodecs(playlist.attributes.CODECS).videoCodec;
    });

    return playlistsWithVideo[0] || null;
  };

  /**
   * @file segment-loader.js
   */

    // in ms
  var CHECK_BUFFER_DELAY = 500;

  /**
   * Determines if we should call endOfStream on the media source based
   * on the state of the buffer or if appened segment was the final
   * segment in the playlist.
   *
   * @param {Object} playlist a media playlist object
   * @param {Object} mediaSource the MediaSource object
   * @param {Number} segmentIndex the index of segment we last appended
   * @returns {Boolean} do we need to call endOfStream on the MediaSource
   */
  var detectEndOfStream = function detectEndOfStream(playlist, mediaSource, segmentIndex) {
    if (!playlist || !mediaSource) {
      return false;
    }

    var segments = playlist.segments;

    // determine a few boolean values to help make the branch below easier
    // to read
    var appendedLastSegment = segmentIndex === segments.length;

    // if we've buffered to the end of the video, we need to call endOfStream
    // so that MediaSources can trigger the `ended` event when it runs out of
    // buffered data instead of waiting for me
    return playlist.endList && mediaSource.readyState === 'open' && appendedLastSegment;
  };

  var finite = function finite(num) {
    return typeof num === 'number' && isFinite(num);
  };

  var illegalMediaSwitch = function illegalMediaSwitch(loaderType, startingMedia, newSegmentMedia) {
    // Although these checks should most likely cover non 'main' types, for now it narrows
    // the scope of our checks.
    if (loaderType !== 'main' || !startingMedia || !newSegmentMedia) {
      return null;
    }

    if (!newSegmentMedia.containsAudio && !newSegmentMedia.containsVideo) {
      return 'Neither audio nor video found in segment.';
    }

    if (startingMedia.containsVideo && !newSegmentMedia.containsVideo) {
      return 'Only audio found in segment when we expected video.' + ' We can\'t switch to audio only from a stream that had video.' + ' To get rid of this message, please add codec information to the manifest.';
    }

    if (!startingMedia.containsVideo && newSegmentMedia.containsVideo) {
      return 'Video found in segment when we expected only audio.' + ' We can\'t switch to a stream with video from an audio only stream.' + ' To get rid of this message, please add codec information to the manifest.';
    }

    return null;
  };

  /**
   * Calculates a time value that is safe to remove from the back buffer without interupting
   * playback.
   *
   * @param {TimeRange} seekable
   *        The current seekable range
   * @param {Number} currentTime
   *        The current time of the player
   * @param {Number} targetDuration
   *        The target duration of the current playlist
   * @return {Number}
   *         Time that is safe to remove from the back buffer without interupting playback
   */
  var safeBackBufferTrimTime = function safeBackBufferTrimTime(seekable$$1, currentTime, targetDuration) {
    var removeToTime = void 0;

    if (seekable$$1.length && seekable$$1.start(0) > 0 && seekable$$1.start(0) < currentTime) {
      // If we have a seekable range use that as the limit for what can be removed safely
      removeToTime = seekable$$1.start(0);
    } else {
      // otherwise remove anything older than 30 seconds before the current playOld head
      removeToTime = currentTime - 30;
    }

    // Don't allow removing from the buffer within target duration of current time
    // to avoid the possibility of removing the GOP currently being played which could
    // cause playback stalls.
    return Math.min(removeToTime, currentTime - targetDuration);
  };

  var segmentInfoString = function segmentInfoString(segmentInfo) {
    var _segmentInfo$segment = segmentInfo.segment,
      start = _segmentInfo$segment.start,
      end = _segmentInfo$segment.end,
      _segmentInfo$playlist = segmentInfo.playlist,
      seq = _segmentInfo$playlist.mediaSequence,
      id = _segmentInfo$playlist.id,
      _segmentInfo$playlist2 = _segmentInfo$playlist.segments,
      segments = _segmentInfo$playlist2 === undefined ? [] : _segmentInfo$playlist2,
      index = segmentInfo.mediaIndex,
      timeline = segmentInfo.timeline;


    return ['appending [' + index + '] of [' + seq + ', ' + (seq + segments.length) + '] from playlist [' + id + ']', '[' + start + ' => ' + end + '] in timeline [' + timeline + ']'].join(' ');
  };

  /**
   * An object that manages segment loading and appending.
   *
   * @class SegmentLoader
   * @param {Object} options required and optional options
   * @extends videojs.EventTarget
   */

  var SegmentLoader = function (_videojs$EventTarget3) {
    inherits(SegmentLoader, _videojs$EventTarget3);

    function SegmentLoader(settings) {
      classCallCheck(this, SegmentLoader);

      // check pre-conditions
      var _this22 = possibleConstructorReturn(this, _videojs$EventTarget3.call(this));

      if (!settings) {
        throw new TypeError('Initialization settings are required');
      }
      if (typeof settings.currentTime !== 'function') {
        throw new TypeError('No currentTime getter specified');
      }
      if (!settings.mediaSource) {
        throw new TypeError('No MediaSource specified');
      }
      // public properties
      _this22.bandwidth = settings.bandwidth;
      _this22.throughput = {rate: 0, count: 0};
      _this22.roundTrip = NaN;
      _this22.resetStats_();
      _this22.mediaIndex = null;

      // private settings
      _this22.hasPlayed_ = settings.hasPlayed;
      _this22.currentTime_ = settings.currentTime;
      _this22.seekable_ = settings.seekable;
      _this22.seeking_ = settings.seeking;
      _this22.duration_ = settings.duration;
      _this22.mediaSource_ = settings.mediaSource;
      _this22.hls_ = settings.hls;
      _this22.loaderType_ = settings.loaderType;
      _this22.startingMedia_ = void 0;
      _this22.segmentMetadataTrack_ = settings.segmentMetadataTrack;
      _this22.goalBufferLength_ = settings.goalBufferLength;
      _this22.sourceType_ = settings.sourceType;
      _this22.state_ = 'INIT';

      // private instance variables
      _this22.checkBufferTimeout_ = null;
      _this22.error_ = void 0;
      _this22.currentTimeline_ = -1;
      _this22.pendingSegment_ = null;
      _this22.mimeType_ = null;
      _this22.sourceUpdater_ = null;
      _this22.xhrOptions_ = null;

      // Fragmented mp4 playback
      _this22.activeInitSegmentId_ = null;
      _this22.initSegments_ = {};

      _this22.decrypter_ = settings.decrypter;

      // Manages the tracking and generation of sync-points, mappings
      // between a time in the display time and a segment index within
      // a playlist
      _this22.syncController_ = settings.syncController;
      _this22.syncPoint_ = {
        segmentIndex: 0,
        time: 0
      };

      _this22.syncController_.on('syncinfoupdate', function () {
        return _this22.trigger('syncinfoupdate');
      });

      _this22.mediaSource_.addEventListener('sourceopen', function () {
        return _this22.ended_ = false;
      });

      // ...for determining the fetch location
      _this22.fetchAtBuffer_ = false;

      _this22.logger_ = logger('SegmentLoader[' + _this22.loaderType_ + ']');

      Object.defineProperty(_this22, 'state', {
        get: function get$$1() {
          return this.state_;
        },
        set: function set$$1(newState) {
          if (newState !== this.state_) {
            this.logger_(this.state_ + ' -> ' + newState);
            this.state_ = newState;
          }
        }
      });
      return _this22;
    }

    /**
     * reset all of our media stats
     *
     * @private
     */


    SegmentLoader.prototype.resetStats_ = function resetStats_() {
      this.mediaBytesTransferred = 0;
      this.mediaRequests = 0;
      this.mediaRequestsAborted = 0;
      this.mediaRequestsTimedout = 0;
      this.mediaRequestsErrored = 0;
      this.mediaTransferDuration = 0;
      this.mediaSecondsLoaded = 0;
    };

    /**
     * dispose of the SegmentLoader and reset to the default state
     */


    SegmentLoader.prototype.dispose = function dispose() {
      this.state = 'DISPOSED';
      this.pause();
      this.abort_();
      if (this.sourceUpdater_) {
        this.sourceUpdater_.dispose();
      }
      this.resetStats_();
    };

    /**
     * abort anything that is currently doing on with the SegmentLoader
     * and reset to a default state
     */


    SegmentLoader.prototype.abort = function abort() {
      if (this.state !== 'WAITING') {
        if (this.pendingSegment_) {
          this.pendingSegment_ = null;
        }
        return;
      }

      this.abort_();

      // We aborted the requests we were waiting on, so reset the loader's state to READY
      // since we are no longer "waiting" on any requests. XHR callback is not always run
      // when the request is aborted. This will prevent the loader from being stuck in the
      // WAITING state indefinitely.
      this.state = 'READY';

      // don't wait for buffer check timeouts to begin fetching the
      // next segment
      if (!this.paused()) {
        this.monitorBuffer_();
      }
    };

    /**
     * abort all pending xhr requests and null any pending segements
     *
     * @private
     */


    SegmentLoader.prototype.abort_ = function abort_() {
      if (this.pendingSegment_) {
        this.pendingSegment_.abortRequests();
      }

      // clear out the segment being processed
      this.pendingSegment_ = null;
    };

    /**
     * set an error on the segment loader and null out any pending segements
     *
     * @param {Error} error the error to set on the SegmentLoader
     * @return {Error} the error that was set or that is currently set
     */


    SegmentLoader.prototype.error = function error(_error) {
      if (typeof _error !== 'undefined') {
        this.error_ = _error;
      }

      this.pendingSegment_ = null;
      return this.error_;
    };

    SegmentLoader.prototype.endOfStream = function endOfStream() {
      this.ended_ = true;
      this.pause();
      this.trigger('ended');
    };

    /**
     * Indicates which time ranges are buffered
     *
     * @return {TimeRange}
     *         TimeRange object representing the current buffered ranges
     */


    SegmentLoader.prototype.buffered_ = function buffered_() {
      if (!this.sourceUpdater_) {
        return videojs$1.createTimeRanges();
      }

      return this.sourceUpdater_.buffered();
    };

    /**
     * Gets and sets init segment for the provided map
     *
     * @param {Object} map
     *        The map object representing the init segment to get or set
     * @param {Boolean=} set
     *        If true, the init segment for the provided map should be saved
     * @return {Object}
     *         map object for desired init segment
     */


    SegmentLoader.prototype.initSegment = function initSegment(map) {
      var set$$1 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

      if (!map) {
        return null;
      }

      var id = initSegmentId(map);
      var storedMap = this.initSegments_[id];

      if (set$$1 && !storedMap && map.bytes) {
        this.initSegments_[id] = storedMap = {
          resolvedUri: map.resolvedUri,
          byterange: map.byterange,
          bytes: map.bytes
        };
      }

      return storedMap || map;
    };

    /**
     * Returns true if all configuration required for loading is present, otherwise false.
     *
     * @return {Boolean} True if the all configuration is ready for loading
     * @private
     */


    SegmentLoader.prototype.couldBeginLoading_ = function couldBeginLoading_() {
      return this.playlist_ && (
        // the source updater is created when init_ is called, so either having a
        // source updater or being in the INIT state with a mimeType is enough
        // to say we have all the needed configuration to start loading.
        this.sourceUpdater_ || this.mimeType_ && this.state === 'INIT') && !this.paused();
    };

    /**
     * load a playlist and start to fill the buffer
     */


    SegmentLoader.prototype.load = function load() {
      // un-pause
      this.monitorBuffer_();

      // if we don't have a playlist yet, keep waiting for one to be
      // specified
      if (!this.playlist_) {
        return;
      }

      // not sure if this is the best place for this
      this.syncController_.setDateTimeMapping(this.playlist_);

      // if all the configuration is ready, initialize and begin loading
      if (this.state === 'INIT' && this.couldBeginLoading_()) {
        return this.init_();
      }

      // if we're in the middle of processing a segment already, don't
      // kick off an additional segment request
      if (!this.couldBeginLoading_() || this.state !== 'READY' && this.state !== 'INIT') {
        return;
      }

      this.state = 'READY';
    };

    /**
     * Once all the starting parameters have been specified, begin
     * operation. This method should only be invoked from the INIT
     * state.
     *
     * @private
     */


    SegmentLoader.prototype.init_ = function init_() {
      this.state = 'READY';
      this.sourceUpdater_ = new SourceUpdater(this.mediaSource_, this.mimeType_, this.loaderType_, this.sourceBufferEmitter_);
      this.resetEverything();
      return this.monitorBuffer_();
    };

    /**
     * set a playlist on the segment loader
     *
     * @param {PlaylistLoader} media the playlist to set on the segment loader
     */


    SegmentLoader.prototype.playlist = function playlist(newPlaylist) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

      if (!newPlaylist) {
        return;
      }

      var oldPlaylist = this.playlist_;
      var segmentInfo = this.pendingSegment_;

      this.playlist_ = newPlaylist;
      this.xhrOptions_ = options;

      // when we haven't started playing yet, the start of a live playlist
      // is always our zero-time so force a sync update each time the playlist
      // is refreshed from the server
      if (!this.hasPlayed_()) {
        newPlaylist.syncInfo = {
          mediaSequence: newPlaylist.mediaSequence,
          time: 0
        };
      }

      var oldId = oldPlaylist ? oldPlaylist.id : null;

      this.logger_('playlist update [' + oldId + ' => ' + newPlaylist.id + ']');

      // in VOD, this is always a rendition switch (or we updated our syncInfo above)
      // in LIVE, we always want to update with new playlists (including refreshes)
      this.trigger('syncinfoupdate');

      // if we were unpaused but waiting for a playlist, start
      // buffering now
      if (this.state === 'INIT' && this.couldBeginLoading_()) {
        return this.init_();
      }

      if (!oldPlaylist || oldPlaylist.uri !== newPlaylist.uri) {
        if (this.mediaIndex !== null) {
          // we must "resync" the segment loader when we switch renditions and
          // the segment loader is already synced to the previous rendition
          this.resyncLoader();
        }

        // the rest of this function depends on `oldPlaylist` being defined
        return;
      }

      // we reloaded the same playlist so we are in a live scenario
      // and we will likely need to adjust the mediaIndex
      var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;

      this.logger_('live window shift [' + mediaSequenceDiff + ']');

      // update the mediaIndex on the SegmentLoader
      // this is important because we can abort a request and this value must be
      // equal to the last appended mediaIndex
      if (this.mediaIndex !== null) {
        this.mediaIndex -= mediaSequenceDiff;
      }

      // update the mediaIndex on the SegmentInfo object
      // this is important because we will update this.mediaIndex with this value
      // in `handleUpdateEnd_` after the segment has been successfully appended
      if (segmentInfo) {
        segmentInfo.mediaIndex -= mediaSequenceDiff;

        // we need to update the referenced segment so that timing information is
        // saved for the new playlist's segment, however, if the segment fell off the
        // playlist, we can leave the old reference and just lose the timing info
        if (segmentInfo.mediaIndex >= 0) {
          segmentInfo.segment = newPlaylist.segments[segmentInfo.mediaIndex];
        }
      }

      this.syncController_.saveExpiredSegmentInfo(oldPlaylist, newPlaylist);
    };

    /**
     * Prevent the loader from fetching additional segments. If there
     * is a segment request outstanding, it will finish processing
     * before the loader halts. A segment loader can be unpaused by
     * calling load().
     */


    SegmentLoader.prototype.pause = function pause() {
      if (this.checkBufferTimeout_) {
        window_1.clearTimeout(this.checkBufferTimeout_);

        this.checkBufferTimeout_ = null;
      }
    };

    /**
     * Returns whether the segment loader is fetching additional
     * segments when given the opportunity. This property can be
     * modified through calls to pause() and load().
     */


    SegmentLoader.prototype.paused = function paused() {
      return this.checkBufferTimeout_ === null;
    };

    /**
     * create/set the following mimetype on the SourceBuffer through a
     * SourceUpdater
     *
     * @param {String} mimeType the mime type string to use
     * @param {Object} sourceBufferEmitter an event emitter that fires when a source buffer
     * is added to the media source
     */


    SegmentLoader.prototype.mimeType = function mimeType(_mimeType, sourceBufferEmitter) {
      if (this.mimeType_) {
        return;
      }

      this.mimeType_ = _mimeType;
      this.sourceBufferEmitter_ = sourceBufferEmitter;
      // if we were unpaused but waiting for a sourceUpdater, start
      // buffering now
      if (this.state === 'INIT' && this.couldBeginLoading_()) {
        this.init_();
      }
    };

    /**
     * Delete all the buffered data and reset the SegmentLoader
     */


    SegmentLoader.prototype.resetEverything = function resetEverything() {
      this.ended_ = false;
      this.resetLoader();
      this.remove(0, this.duration_());
      this.trigger('reseteverything');
    };

    /**
     * Force the SegmentLoader to resync and start loading around the currentTime instead
     * of starting at the end of the buffer
     *
     * Useful for fast quality changes
     */


    SegmentLoader.prototype.resetLoader = function resetLoader() {
      this.fetchAtBuffer_ = false;
      this.resyncLoader();
    };

    /**
     * Force the SegmentLoader to restart synchronization and make a conservative guess
     * before returning to the simple walk-forward method
     */


    SegmentLoader.prototype.resyncLoader = function resyncLoader() {
      this.mediaIndex = null;
      this.syncPoint_ = null;
      this.abort();
    };

    /**
     * Remove any data in the source buffer between start and end times
     * @param {Number} start - the start time of the region to remove from the buffer
     * @param {Number} end - the end time of the region to remove from the buffer
     */


    SegmentLoader.prototype.remove = function remove(start, end) {
      if (this.sourceUpdater_) {
        this.sourceUpdater_.remove(start, end);
      }
      removeCuesFromTrack(start, end, this.segmentMetadataTrack_);
    };

    /**
     * (re-)schedule monitorBufferTick_ to run as soon as possible
     *
     * @private
     */


    SegmentLoader.prototype.monitorBuffer_ = function monitorBuffer_() {
      if (this.checkBufferTimeout_) {
        window_1.clearTimeout(this.checkBufferTimeout_);
      }

      this.checkBufferTimeout_ = window_1.setTimeout(this.monitorBufferTick_.bind(this), 1);
    };

    /**
     * As long as the SegmentLoader is in the READY state, periodically
     * invoke fillBuffer_().
     *
     * @private
     */


    SegmentLoader.prototype.monitorBufferTick_ = function monitorBufferTick_() {
      if (this.state === 'READY') {
        this.fillBuffer_();
      }

      if (this.checkBufferTimeout_) {
        window_1.clearTimeout(this.checkBufferTimeout_);
      }

      this.checkBufferTimeout_ = window_1.setTimeout(this.monitorBufferTick_.bind(this), CHECK_BUFFER_DELAY);
    };

    /**
     * fill the buffer with segements unless the sourceBuffers are
     * currently updating
     *
     * Note: this function should only ever be called by monitorBuffer_
     * and never directly
     *
     * @private
     */


    SegmentLoader.prototype.fillBuffer_ = function fillBuffer_() {
      if (this.sourceUpdater_.updating()) {
        return;
      }

      if (!this.syncPoint_) {
        this.syncPoint_ = this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());
      }

      // see if we need to begin loading immediately
      var segmentInfo = this.checkBuffer_(this.buffered_(), this.playlist_, this.mediaIndex, this.hasPlayed_(), this.currentTime_(), this.syncPoint_);

      if (!segmentInfo) {
        return;
      }

      var isEndOfStream = detectEndOfStream(this.playlist_, this.mediaSource_, segmentInfo.mediaIndex);

      if (isEndOfStream) {
        this.endOfStream();
        return;
      }

      if (segmentInfo.mediaIndex === this.playlist_.segments.length - 1 && this.mediaSource_.readyState === 'ended' && !this.seeking_()) {
        return;
      }

      // We will need to change timestampOffset of the sourceBuffer if either of
      // the following conditions are true:
      // - The segment.timeline !== this.currentTimeline
      //   (we are crossing a discontinuity somehow)
      // - The "timestampOffset" for the start of this segment is less than
      //   the currently set timestampOffset
      if (segmentInfo.timeline !== this.currentTimeline_ || segmentInfo.startOfSegment !== null && segmentInfo.startOfSegment < this.sourceUpdater_.timestampOffset()) {
        this.syncController_.reset();
        segmentInfo.timestampOffset = segmentInfo.startOfSegment;
      }

      this.loadSegment_(segmentInfo);
    };

    /**
     * Determines what segment request should be made, given current playback
     * state.
     *
     * @param {TimeRanges} buffered - the state of the buffer
     * @param {Object} playlist - the playlist object to fetch segments from
     * @param {Number} mediaIndex - the previous mediaIndex fetched or null
     * @param {Boolean} hasPlayed - a flag indicating whether we have played or not
     * @param {Number} currentTime - the playback position in seconds
     * @param {Object} syncPoint - a segment info object that describes the
     * @returns {Object} a segment request object that describes the segment to load
     */


    SegmentLoader.prototype.checkBuffer_ = function checkBuffer_(buffered, playlist, mediaIndex, hasPlayed, currentTime, syncPoint) {
      var lastBufferedEnd = 0;
      var startOfSegment = void 0;

      if (buffered.length) {
        lastBufferedEnd = buffered.end(buffered.length - 1);
      }

      var bufferedTime = Math.max(0, lastBufferedEnd - currentTime);

      if (!playlist.segments.length) {
        return null;
      }

      // if there is plenty of content buffered, and the video has
      // been played before relax for awhile
      if (bufferedTime >= this.goalBufferLength_()) {
        return null;
      }

      // if the video has not yet played once, and we already have
      // one segment downloaded do nothing
      if (!hasPlayed && bufferedTime >= 1) {
        return null;
      }

      // When the syncPoint is null, there is no way of determining a good
      // conservative segment index to fetch from
      // The best thing to do here is to get the kind of sync-point data by
      // making a request
      if (syncPoint === null) {
        mediaIndex = this.getSyncSegmentCandidate_(playlist);
        return this.generateSegmentInfo_(playlist, mediaIndex, null, true);
      }

      // Under normal playback conditions fetching is a simple walk forward
      if (mediaIndex !== null) {
        var segment = playlist.segments[mediaIndex];

        if (segment && segment.end) {
          startOfSegment = segment.end;
        } else {
          startOfSegment = lastBufferedEnd;
        }
        return this.generateSegmentInfo_(playlist, mediaIndex + 1, startOfSegment, false);
      }

      // There is a sync-point but the lack of a mediaIndex indicates that
      // we need to make a good conservative guess about which segment to
      // fetch
      if (this.fetchAtBuffer_) {
        // Find the segment containing the end of the buffer
        var mediaSourceInfo = Playlist.getMediaInfoForTime(playlist, lastBufferedEnd, syncPoint.segmentIndex, syncPoint.time);

        mediaIndex = mediaSourceInfo.mediaIndex;
        startOfSegment = mediaSourceInfo.startTime;
      } else {
        // Find the segment containing currentTime
        var _mediaSourceInfo = Playlist.getMediaInfoForTime(playlist, currentTime, syncPoint.segmentIndex, syncPoint.time);

        mediaIndex = _mediaSourceInfo.mediaIndex;
        startOfSegment = _mediaSourceInfo.startTime;
      }

      return this.generateSegmentInfo_(playlist, mediaIndex, startOfSegment, false);
    };

    /**
     * The segment loader has no recourse except to fetch a segment in the
     * current playlist and use the internal timestamps in that segment to
     * generate a syncPoint. This function returns a good candidate index
     * for that process.
     *
     * @param {Object} playlist - the playlist object to look for a
     * @returns {Number} An index of a segment from the playlist to load
     */


    SegmentLoader.prototype.getSyncSegmentCandidate_ = function getSyncSegmentCandidate_(playlist) {
      var _this23 = this;

      if (this.currentTimeline_ === -1) {
        return 0;
      }

      var segmentIndexArray = playlist.segments.map(function (s, i) {
        return {
          timeline: s.timeline,
          segmentIndex: i
        };
      }).filter(function (s) {
        return s.timeline === _this23.currentTimeline_;
      });

      if (segmentIndexArray.length) {
        return segmentIndexArray[Math.min(segmentIndexArray.length - 1, 1)].segmentIndex;
      }

      return Math.max(playlist.segments.length - 1, 0);
    };

    SegmentLoader.prototype.generateSegmentInfo_ = function generateSegmentInfo_(playlist, mediaIndex, startOfSegment, isSyncRequest) {
      if (mediaIndex < 0 || mediaIndex >= playlist.segments.length) {
        return null;
      }

      var segment = playlist.segments[mediaIndex];

      return {
        requestId: 'segment-loader-' + Math.random(),
        // resolve the segment URL relative to the playlist
        uri: segment.resolvedUri,
        // the segment's mediaIndex at the time it was requested
        mediaIndex: mediaIndex,
        // whether or not to update the SegmentLoader's state with this
        // segment's mediaIndex
        isSyncRequest: isSyncRequest,
        startOfSegment: startOfSegment,
        // the segment's playlist
        playlist: playlist,
        // unencrypted bytes of the segment
        bytes: null,
        // when a key is defined for this segment, the encrypted bytes
        encryptedBytes: null,
        // The target timestampOffset for this segment when we append it
        // to the source buffer
        timestampOffset: null,
        // The timeline that the segment is in
        timeline: segment.timeline,
        // The expected duration of the segment in seconds
        duration: segment.duration,
        // retain the segment in case the playlist updates while doing an async process
        segment: segment
      };
    };

    /**
     * Determines if the network has enough bandwidth to complete the current segment
     * request in a timely manner. If not, the request will be aborted early and bandwidth
     * updated to trigger a playlist switch.
     *
     * @param {Object} stats
     *        Object containing stats about the request timing and size
     * @return {Boolean} True if the request was aborted, false otherwise
     * @private
     */


    SegmentLoader.prototype.abortRequestEarly_ = function abortRequestEarly_(stats) {
      if (this.hls_.tech_.paused() ||
        // Don't abort if the current playlist is on the lowestEnabledRendition
        // TODO: Replace using timeout with a boolean indicating whether this playlist is
        //       the lowestEnabledRendition.
        !this.xhrOptions_.timeout ||
        // Don't abort if we have no bandwidth information to estimate segment sizes
        !this.playlist_.attributes.BANDWIDTH) {
        return false;
      }

      // Wait at least 1 second since the first byte of data has been received before
      // using the calculated bandwidth from the progress event to allow the bitrate
      // to stabilize
      if (Date.now() - (stats.firstBytesReceivedAt || Date.now()) < 1000) {
        return false;
      }

      var currentTime = this.currentTime_();
      var measuredBandwidth = stats.bandwidth;
      var segmentDuration = this.pendingSegment_.duration;

      var requestTimeRemaining = Playlist.estimateSegmentRequestTime(segmentDuration, measuredBandwidth, this.playlist_, stats.bytesReceived);

      // Subtract 1 from the timeUntilRebuffer so we still consider an early abort
      // if we are only left with less than 1 second when the request completes.
      // A negative timeUntilRebuffering indicates we are already rebuffering
      var timeUntilRebuffer$$1 = timeUntilRebuffer(this.buffered_(), currentTime, this.hls_.tech_.playbackRate()) - 1;

      // Only consider aborting early if the estimated time to finish the download
      // is larger than the estimated time until the player runs out of forward buffer
      if (requestTimeRemaining <= timeUntilRebuffer$$1) {
        return false;
      }

      var switchCandidate = minRebufferMaxBandwidthSelector({
        master: this.hls_.playlists.master,
        currentTime: currentTime,
        bandwidth: measuredBandwidth,
        duration: this.duration_(),
        segmentDuration: segmentDuration,
        timeUntilRebuffer: timeUntilRebuffer$$1,
        currentTimeline: this.currentTimeline_,
        syncController: this.syncController_
      });

      if (!switchCandidate) {
        return;
      }

      var rebufferingImpact = requestTimeRemaining - timeUntilRebuffer$$1;

      var timeSavedBySwitching = rebufferingImpact - switchCandidate.rebufferingImpact;

      var minimumTimeSaving = 0.5;

      // If we are already rebuffering, increase the amount of variance we add to the
      // potential round trip time of the new request so that we are not too aggressive
      // with switching to a playlist that might save us a fraction of a second.
      if (timeUntilRebuffer$$1 <= TIME_FUDGE_FACTOR) {
        minimumTimeSaving = 1;
      }

      if (!switchCandidate.playlist || switchCandidate.playlist.uri === this.playlist_.uri || timeSavedBySwitching < minimumTimeSaving) {
        return false;
      }

      // set the bandwidth to that of the desired playlist being sure to scale by
      // BANDWIDTH_VARIANCE and add one so the playlist selector does not exclude it
      // don't trigger a bandwidthupdate as the bandwidth is artifial
      this.bandwidth = switchCandidate.playlist.attributes.BANDWIDTH * Config.BANDWIDTH_VARIANCE + 1;
      this.abort();
      this.trigger('earlyabort');
      return true;
    };

    /**
     * XHR `progress` event handler
     *
     * @param {Event}
     *        The XHR `progress` event
     * @param {Object} simpleSegment
     *        A simplified segment object copy
     * @private
     */


    SegmentLoader.prototype.handleProgress_ = function handleProgress_(event, simpleSegment) {
      if (!this.pendingSegment_ || simpleSegment.requestId !== this.pendingSegment_.requestId || this.abortRequestEarly_(simpleSegment.stats)) {
        return;
      }

      this.trigger('progress');
    };

    /**
     * load a specific segment from a request into the buffer
     *
     * @private
     */


    SegmentLoader.prototype.loadSegment_ = function loadSegment_(segmentInfo) {
      this.state = 'WAITING';
      this.pendingSegment_ = segmentInfo;
      this.trimBackBuffer_(segmentInfo);

      segmentInfo.abortRequests = mediaSegmentRequest(this.hls_.xhr, this.xhrOptions_, this.decrypter_, this.createSimplifiedSegmentObj_(segmentInfo),
        // progress callback
        this.handleProgress_.bind(this), this.segmentRequestFinished_.bind(this));
    };

    /**
     * trim the back buffer so that we don't have too much data
     * in the source buffer
     *
     * @private
     *
     * @param {Object} segmentInfo - the current segment
     */


    SegmentLoader.prototype.trimBackBuffer_ = function trimBackBuffer_(segmentInfo) {
      var removeToTime = safeBackBufferTrimTime(this.seekable_(), this.currentTime_(), this.playlist_.targetDuration || 10);

      // Chrome has a hard limit of 150MB of
      // buffer and a very conservative "garbage collector"
      // We manually clear out the old buffer to ensure
      // we don't trigger the QuotaExceeded error
      // on the source buffer during subsequent appends

      if (removeToTime > 0) {
        this.remove(0, removeToTime);
      }
    };

    /**
     * created a simplified copy of the segment object with just the
     * information necessary to perform the XHR and decryption
     *
     * @private
     *
     * @param {Object} segmentInfo - the current segment
     * @returns {Object} a simplified segment object copy
     */


    SegmentLoader.prototype.createSimplifiedSegmentObj_ = function createSimplifiedSegmentObj_(segmentInfo) {
      var segment = segmentInfo.segment;
      var simpleSegment = {
        resolvedUri: segment.resolvedUri,
        byterange: segment.byterange,
        requestId: segmentInfo.requestId
      };

      if (segment.key) {
        // if the media sequence is greater than 2^32, the IV will be incorrect
        // assuming 10s segments, that would be about 1300 years
        var iv = segment.key.iv || new Uint32Array([0, 0, 0, segmentInfo.mediaIndex + segmentInfo.playlist.mediaSequence]);

        simpleSegment.key = {
          resolvedUri: segment.key.resolvedUri,
          iv: iv
        };
      }

      if (segment.map) {
        simpleSegment.map = this.initSegment(segment.map);
      }

      return simpleSegment;
    };

    /**
     * Handle the callback from the segmentRequest function and set the
     * associated SegmentLoader state and errors if necessary
     *
     * @private
     */


    SegmentLoader.prototype.segmentRequestFinished_ = function segmentRequestFinished_(error, simpleSegment) {
      // every request counts as a media request even if it has been aborted
      // or canceled due to a timeout
      this.mediaRequests += 1;

      if (simpleSegment.stats) {
        this.mediaBytesTransferred += simpleSegment.stats.bytesReceived;
        this.mediaTransferDuration += simpleSegment.stats.roundTripTime;
      }

      // The request was aborted and the SegmentLoader has already been reset
      if (!this.pendingSegment_) {
        this.mediaRequestsAborted += 1;
        return;
      }

      // the request was aborted and the SegmentLoader has already started
      // another request. this can happen when the timeout for an aborted
      // request triggers due to a limitation in the XHR library
      // do not count this as any sort of request or we risk double-counting
      if (simpleSegment.requestId !== this.pendingSegment_.requestId) {
        return;
      }

      // an error occurred from the active pendingSegment_ so reset everything
      if (error) {
        this.pendingSegment_ = null;
        this.state = 'READY';

        // the requests were aborted just record the aborted stat and exit
        // this is not a true error condition and nothing corrective needs
        // to be done
        if (error.code === REQUEST_ERRORS.ABORTED) {
          this.mediaRequestsAborted += 1;
          return;
        }

        this.pause();

        // the error is really just that at least one of the requests timed-out
        // set the bandwidth to a very low value and trigger an ABR switch to
        // take emergency action
        if (error.code === REQUEST_ERRORS.TIMEOUT) {
          this.mediaRequestsTimedout += 1;
          this.bandwidth = 1;
          this.roundTrip = NaN;
          this.trigger('bandwidthupdate');
          return;
        }

        // if control-flow has arrived here, then the error is real
        // emit an error event to blacklist the current playlist
        this.mediaRequestsErrored += 1;
        this.error(error);
        this.trigger('error');
        return;
      }

      // the response was a success so set any bandwidth stats the request
      // generated for ABR purposes
      this.bandwidth = simpleSegment.stats.bandwidth;
      this.roundTrip = simpleSegment.stats.roundTripTime;

      // if this request included an initialization segment, save that data
      // to the initSegment cache
      if (simpleSegment.map) {
        simpleSegment.map = this.initSegment(simpleSegment.map, true);
      }

      this.processSegmentResponse_(simpleSegment);
    };

    /**
     * Move any important data from the simplified segment object
     * back to the real segment object for future phases
     *
     * @private
     */


    SegmentLoader.prototype.processSegmentResponse_ = function processSegmentResponse_(simpleSegment) {
      var segmentInfo = this.pendingSegment_;

      segmentInfo.bytes = simpleSegment.bytes;
      if (simpleSegment.map) {
        segmentInfo.segment.map.bytes = simpleSegment.map.bytes;
      }

      segmentInfo.endOfAllRequests = simpleSegment.endOfAllRequests;
      this.handleSegment_();
    };

    /**
     * append a decrypted segement to the SourceBuffer through a SourceUpdater
     *
     * @private
     */


    SegmentLoader.prototype.handleSegment_ = function handleSegment_() {
      var _this24 = this;

      if (!this.pendingSegment_) {
        this.state = 'READY';
        return;
      }

      var segmentInfo = this.pendingSegment_;
      var segment = segmentInfo.segment;
      var timingInfo = this.syncController_.probeSegmentInfo(segmentInfo);

      // When we have our first timing info, determine what media types this loader is
      // dealing with. Although we're maintaining extra state, it helps to preserve the
      // separation of segment loader from the actual source buffers.
      if (typeof this.startingMedia_ === 'undefined' && timingInfo && (
        // Guard against cases where we're not getting timing info at all until we are
        // certain that all streams will provide it.
        timingInfo.containsAudio || timingInfo.containsVideo)) {
        this.startingMedia_ = {
          containsAudio: timingInfo.containsAudio,
          containsVideo: timingInfo.containsVideo
        };
      }

      var illegalMediaSwitchError = illegalMediaSwitch(this.loaderType_, this.startingMedia_, timingInfo);

      if (illegalMediaSwitchError) {
        this.error({
          message: illegalMediaSwitchError,
          blacklistDuration: Infinity
        });
        this.trigger('error');
        return;
      }

      if (segmentInfo.isSyncRequest) {
        this.trigger('syncinfoupdate');
        this.pendingSegment_ = null;
        this.state = 'READY';
        return;
      }

      if (segmentInfo.timestampOffset !== null && segmentInfo.timestampOffset !== this.sourceUpdater_.timestampOffset()) {
        this.sourceUpdater_.timestampOffset(segmentInfo.timestampOffset);
        // fired when a timestamp offset is set in HLS (can also identify discontinuities)
        this.trigger('timestampoffset');
      }

      var timelineMapping = this.syncController_.mappingForTimeline(segmentInfo.timeline);

      if (timelineMapping !== null) {
        this.trigger({
          type: 'segmenttimemapping',
          mapping: timelineMapping
        });
      }

      this.state = 'APPENDING';

      // if the media initialization segment is changing, append it
      // before the content segment
      if (segment.map) {
        var initId = initSegmentId(segment.map);

        if (!this.activeInitSegmentId_ || this.activeInitSegmentId_ !== initId) {
          var initSegment = this.initSegment(segment.map);

          this.sourceUpdater_.appendBuffer(initSegment.bytes, function () {
            _this24.activeInitSegmentId_ = initId;
          });
        }
      }

      segmentInfo.byteLength = segmentInfo.bytes.byteLength;
      if (typeof segment.start === 'number' && typeof segment.end === 'number') {
        this.mediaSecondsLoaded += segment.end - segment.start;
      } else {
        this.mediaSecondsLoaded += segment.duration;
      }

      this.logger_(segmentInfoString(segmentInfo));

      this.sourceUpdater_.appendBuffer(segmentInfo.bytes, this.handleUpdateEnd_.bind(this));
    };

    /**
     * callback to run when appendBuffer is finished. detects if we are
     * in a good state to do things with the data we got, or if we need
     * to wait for more
     *
     * @private
     */


    SegmentLoader.prototype.handleUpdateEnd_ = function handleUpdateEnd_() {
      if (!this.pendingSegment_) {
        this.state = 'READY';
        if (!this.paused()) {
          this.monitorBuffer_();
        }
        return;
      }

      var segmentInfo = this.pendingSegment_;
      var segment = segmentInfo.segment;
      var isWalkingForward = this.mediaIndex !== null;

      this.pendingSegment_ = null;
      this.recordThroughput_(segmentInfo);
      this.addSegmentMetadataCue_(segmentInfo);

      this.state = 'READY';

      this.mediaIndex = segmentInfo.mediaIndex;
      this.fetchAtBuffer_ = true;
      this.currentTimeline_ = segmentInfo.timeline;

      // We must update the syncinfo to recalculate the seekable range before
      // the following conditional otherwise it may consider this a bad "guess"
      // and attempt to resync when the post-update seekable window and live
      // point would mean that this was the perfect segment to fetch
      this.trigger('syncinfoupdate');

      // If we previously appended a segment that ends more than 3 targetDurations before
      // the currentTime_ that means that our conservative guess was too conservative.
      // In that case, reset the loader state so that we try to use any information gained
      // from the previous request to create a new, more accurate, sync-point.
      if (segment.end && this.currentTime_() - segment.end > segmentInfo.playlist.targetDuration * 3) {
        this.resetEverything();
        return;
      }

      // Don't do a rendition switch unless we have enough time to get a sync segment
      // and conservatively guess
      if (isWalkingForward) {
        this.trigger('bandwidthupdate');
      }
      this.trigger('progress');

      // any time an update finishes and the last segment is in the
      // buffer, end the stream. this ensures the "ended" event will
      // fire if playback reaches that point.
      var isEndOfStream = detectEndOfStream(segmentInfo.playlist, this.mediaSource_, segmentInfo.mediaIndex + 1);

      if (isEndOfStream) {
        this.endOfStream();
      }

      if (!this.paused()) {
        this.monitorBuffer_();
      }
    };

    /**
     * Records the current throughput of the decrypt, transmux, and append
     * portion of the semgment pipeline. `throughput.rate` is a the cumulative
     * moving average of the throughput. `throughput.count` is the number of
     * data points in the average.
     *
     * @private
     * @param {Object} segmentInfo the object returned by loadSegment
     */


    SegmentLoader.prototype.recordThroughput_ = function recordThroughput_(segmentInfo) {
      var rate = this.throughput.rate;
      // Add one to the time to ensure that we don't accidentally attempt to divide
      // by zero in the case where the throughput is ridiculously high
      var segmentProcessingTime = Date.now() - segmentInfo.endOfAllRequests + 1;
      // Multiply by 8000 to convert from bytes/millisecond to bits/second
      var segmentProcessingThroughput = Math.floor(segmentInfo.byteLength / segmentProcessingTime * 8 * 1000);

      // This is just a cumulative moving average calculation:
      //   newAvg = oldAvg + (sample - oldAvg) / (sampleCount + 1)
      this.throughput.rate += (segmentProcessingThroughput - rate) / ++this.throughput.count;
    };

    /**
     * Adds a cue to the segment-metadata track with some metadata information about the
     * segment
     *
     * @private
     * @param {Object} segmentInfo
     *        the object returned by loadSegment
     * @method addSegmentMetadataCue_
     */


    SegmentLoader.prototype.addSegmentMetadataCue_ = function addSegmentMetadataCue_(segmentInfo) {
      if (!this.segmentMetadataTrack_) {
        return;
      }

      var segment = segmentInfo.segment;
      var start = segment.start;
      var end = segment.end;

      // Do not try adding the cue if the start and end times are invalid.
      if (!finite(start) || !finite(end)) {
        return;
      }

      removeCuesFromTrack(start, end, this.segmentMetadataTrack_);

      var Cue = window_1.WebKitDataCue || window_1.VTTCue;
      var value = {
        bandwidth: segmentInfo.playlist.attributes.BANDWIDTH,
        resolution: segmentInfo.playlist.attributes.RESOLUTION,
        codecs: segmentInfo.playlist.attributes.CODECS,
        byteLength: segmentInfo.byteLength,
        uri: segmentInfo.uri,
        timeline: segmentInfo.timeline,
        playlist: segmentInfo.playlist.uri,
        start: start,
        end: end
      };
      var data = JSON.stringify(value);
      var cue = new Cue(start, end, data);

      // Attach the metadata to the value property of the cue to keep consistency between
      // the differences of WebKitDataCue in safari and VTTCue in other browsers
      cue.value = value;

      this.segmentMetadataTrack_.addCue(cue);
    };

    return SegmentLoader;
  }(videojs$1.EventTarget);

  /**
   * @file vtt-segment-loader.js
   */

  var VTT_LINE_TERMINATORS = new Uint8Array('\n\n'.split('').map(function (char) {
    return char.charCodeAt(0);
  }));

  var uintToString = function uintToString(uintArray) {
    return String.fromCharCode.apply(null, uintArray);
  };

  /**
   * An object that manages segment loading and appending.
   *
   * @class VTTSegmentLoader
   * @param {Object} options required and optional options
   * @extends videojs.EventTarget
   */

  var VTTSegmentLoader = function (_SegmentLoader) {
    inherits(VTTSegmentLoader, _SegmentLoader);

    function VTTSegmentLoader(settings) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      classCallCheck(this, VTTSegmentLoader);

      // SegmentLoader requires a MediaSource be specified or it will throw an error;
      // however, VTTSegmentLoader has no need of a media source, so delete the reference
      var _this25 = possibleConstructorReturn(this, _SegmentLoader.call(this, settings, options));

      _this25.mediaSource_ = null;

      _this25.subtitlesTrack_ = null;
      return _this25;
    }

    /**
     * Indicates which time ranges are buffered
     *
     * @return {TimeRange}
     *         TimeRange object representing the current buffered ranges
     */


    VTTSegmentLoader.prototype.buffered_ = function buffered_() {
      if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues.length) {
        return videojs$1.createTimeRanges();
      }

      var cues = this.subtitlesTrack_.cues;
      var start = cues[0].startTime;
      var end = cues[cues.length - 1].startTime;

      return videojs$1.createTimeRanges([[start, end]]);
    };

    /**
     * Gets and sets init segment for the provided map
     *
     * @param {Object} map
     *        The map object representing the init segment to get or set
     * @param {Boolean=} set
     *        If true, the init segment for the provided map should be saved
     * @return {Object}
     *         map object for desired init segment
     */


    VTTSegmentLoader.prototype.initSegment = function initSegment(map) {
      var set$$1 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

      if (!map) {
        return null;
      }

      var id = initSegmentId(map);
      var storedMap = this.initSegments_[id];

      if (set$$1 && !storedMap && map.bytes) {
        // append WebVTT line terminators to the media initialization segment if it exists
        // to follow the WebVTT spec (https://w3c.github.io/webvtt/#file-structure) that
        // requires two or more WebVTT line terminators between the WebVTT header and the
        // rest of the file
        var combinedByteLength = VTT_LINE_TERMINATORS.byteLength + map.bytes.byteLength;
        var combinedSegment = new Uint8Array(combinedByteLength);

        combinedSegment.set(map.bytes);
        combinedSegment.set(VTT_LINE_TERMINATORS, map.bytes.byteLength);

        this.initSegments_[id] = storedMap = {
          resolvedUri: map.resolvedUri,
          byterange: map.byterange,
          bytes: combinedSegment
        };
      }

      return storedMap || map;
    };

    /**
     * Returns true if all configuration required for loading is present, otherwise false.
     *
     * @return {Boolean} True if the all configuration is ready for loading
     * @private
     */


    VTTSegmentLoader.prototype.couldBeginLoading_ = function couldBeginLoading_() {
      return this.playlist_ && this.subtitlesTrack_ && !this.paused();
    };

    /**
     * Once all the starting parameters have been specified, begin
     * operation. This method should only be invoked from the INIT
     * state.
     *
     * @private
     */


    VTTSegmentLoader.prototype.init_ = function init_() {
      this.state = 'READY';
      this.resetEverything();
      return this.monitorBuffer_();
    };

    /**
     * Set a subtitle track on the segment loader to add subtitles to
     *
     * @param {TextTrack=} track
     *        The text track to add loaded subtitles to
     * @return {TextTrack}
     *        Returns the subtitles track
     */


    VTTSegmentLoader.prototype.track = function track(_track) {
      if (typeof _track === 'undefined') {
        return this.subtitlesTrack_;
      }

      this.subtitlesTrack_ = _track;

      // if we were unpaused but waiting for a sourceUpdater, start
      // buffering now
      if (this.state === 'INIT' && this.couldBeginLoading_()) {
        this.init_();
      }

      return this.subtitlesTrack_;
    };

    /**
     * Remove any data in the source buffer between start and end times
     * @param {Number} start - the start time of the region to remove from the buffer
     * @param {Number} end - the end time of the region to remove from the buffer
     */


    VTTSegmentLoader.prototype.remove = function remove(start, end) {
      removeCuesFromTrack(start, end, this.subtitlesTrack_);
    };

    /**
     * fill the buffer with segements unless the sourceBuffers are
     * currently updating
     *
     * Note: this function should only ever be called by monitorBuffer_
     * and never directly
     *
     * @private
     */


    VTTSegmentLoader.prototype.fillBuffer_ = function fillBuffer_() {
      var _this26 = this;

      if (!this.syncPoint_) {
        this.syncPoint_ = this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());
      }

      // see if we need to begin loading immediately
      var segmentInfo = this.checkBuffer_(this.buffered_(), this.playlist_, this.mediaIndex, this.hasPlayed_(), this.currentTime_(), this.syncPoint_);

      segmentInfo = this.skipEmptySegments_(segmentInfo);

      if (!segmentInfo) {
        return;
      }

      if (this.syncController_.timestampOffsetForTimeline(segmentInfo.timeline) === null) {
        // We don't have the timestamp offset that we need to sync subtitles.
        // Rerun on a timestamp offset or user interaction.
        var checkTimestampOffset = function checkTimestampOffset() {
          _this26.state = 'READY';
          if (!_this26.paused()) {
            // if not paused, queue a buffer check as soon as possible
            _this26.monitorBuffer_();
          }
        };

        this.syncController_.one('timestampoffset', checkTimestampOffset);
        this.state = 'WAITING_ON_TIMELINE';
        return;
      }

      this.loadSegment_(segmentInfo);
    };

    /**
     * Prevents the segment loader from requesting segments we know contain no subtitles
     * by walking forward until we find the next segment that we don't know whether it is
     * empty or not.
     *
     * @param {Object} segmentInfo
     *        a segment info object that describes the current segment
     * @return {Object}
     *         a segment info object that describes the current segment
     */


    VTTSegmentLoader.prototype.skipEmptySegments_ = function skipEmptySegments_(segmentInfo) {
      while (segmentInfo && segmentInfo.segment.empty) {
        segmentInfo = this.generateSegmentInfo_(segmentInfo.playlist, segmentInfo.mediaIndex + 1, segmentInfo.startOfSegment + segmentInfo.duration, segmentInfo.isSyncRequest);
      }
      return segmentInfo;
    };

    /**
     * append a decrypted segement to the SourceBuffer through a SourceUpdater
     *
     * @private
     */


    VTTSegmentLoader.prototype.handleSegment_ = function handleSegment_() {
      var _this27 = this;

      if (!this.pendingSegment_ || !this.subtitlesTrack_) {
        this.state = 'READY';
        return;
      }

      this.state = 'APPENDING';

      var segmentInfo = this.pendingSegment_;
      var segment = segmentInfo.segment;

      // Make sure that vttjs has loaded, otherwise, wait till it finished loading
      if (typeof window_1.WebVTT !== 'function' && this.subtitlesTrack_ && this.subtitlesTrack_.tech_) {

        var loadHandler = function loadHandler() {
          _this27.handleSegment_();
        };

        this.state = 'WAITING_ON_VTTJS';
        this.subtitlesTrack_.tech_.one('vttjsloaded', loadHandler);
        this.subtitlesTrack_.tech_.one('vttjserror', function () {
          _this27.subtitlesTrack_.tech_.off('vttjsloaded', loadHandler);
          _this27.error({
            message: 'Error loading vtt.js'
          });
          _this27.state = 'READY';
          _this27.pause();
          _this27.trigger('error');
        });

        return;
      }

      segment.requested = true;

      try {
        this.parseVTTCues_(segmentInfo);
      } catch (e) {
        this.error({
          message: e.message
        });
        this.state = 'READY';
        this.pause();
        return this.trigger('error');
      }

      this.updateTimeMapping_(segmentInfo, this.syncController_.timelines[segmentInfo.timeline], this.playlist_);

      if (segmentInfo.isSyncRequest) {
        this.trigger('syncinfoupdate');
        this.pendingSegment_ = null;
        this.state = 'READY';
        return;
      }

      segmentInfo.byteLength = segmentInfo.bytes.byteLength;

      this.mediaSecondsLoaded += segment.duration;

      if (segmentInfo.cues.length) {
        // remove any overlapping cues to prevent doubling
        this.remove(segmentInfo.cues[0].endTime, segmentInfo.cues[segmentInfo.cues.length - 1].endTime);
      }

      segmentInfo.cues.forEach(function (cue) {
        _this27.subtitlesTrack_.addCue(cue);
      });

      this.handleUpdateEnd_();
    };

    /**
     * Uses the WebVTT parser to parse the segment response
     *
     * @param {Object} segmentInfo
     *        a segment info object that describes the current segment
     * @private
     */


    VTTSegmentLoader.prototype.parseVTTCues_ = function parseVTTCues_(segmentInfo) {
      var decoder = void 0;
      var decodeBytesToString = false;

      if (typeof window_1.TextDecoder === 'function') {
        decoder = new window_1.TextDecoder('utf8');
      } else {
        decoder = window_1.WebVTT.StringDecoder();
        decodeBytesToString = true;
      }

      var parser = new window_1.WebVTT.Parser(window_1, window_1.vttjs, decoder);

      segmentInfo.cues = [];
      segmentInfo.timestampmap = {MPEGTS: 0, LOCAL: 0};

      parser.oncue = segmentInfo.cues.push.bind(segmentInfo.cues);
      parser.ontimestampmap = function (map) {
        return segmentInfo.timestampmap = map;
      };
      parser.onparsingerror = function (error) {
        videojs$1.log.warn('Error encountered when parsing cues: ' + error.message);
      };

      if (segmentInfo.segment.map) {
        var mapData = segmentInfo.segment.map.bytes;

        if (decodeBytesToString) {
          mapData = uintToString(mapData);
        }

        parser.parse(mapData);
      }

      var segmentData = segmentInfo.bytes;

      if (decodeBytesToString) {
        segmentData = uintToString(segmentData);
      }

      parser.parse(segmentData);
      parser.flush();
    };

    /**
     * Updates the start and end times of any cues parsed by the WebVTT parser using
     * the information parsed from the X-TIMESTAMP-MAP header and a TS to media time mapping
     * from the SyncController
     *
     * @param {Object} segmentInfo
     *        a segment info object that describes the current segment
     * @param {Object} mappingObj
     *        object containing a mapping from TS to media time
     * @param {Object} playlist
     *        the playlist object containing the segment
     * @private
     */


    VTTSegmentLoader.prototype.updateTimeMapping_ = function updateTimeMapping_(segmentInfo, mappingObj, playlist) {
      var segment = segmentInfo.segment;

      if (!mappingObj) {
        // If the sync controller does not have a mapping of TS to Media Time for the
        // timeline, then we don't have enough information to update the cue
        // start/end times
        return;
      }

      if (!segmentInfo.cues.length) {
        // If there are no cues, we also do not have enough information to figure out
        // segment timing. Mark that the segment contains no cues so we don't re-request
        // an empty segment.
        segment.empty = true;
        return;
      }

      var timestampmap = segmentInfo.timestampmap;
      var diff = timestampmap.MPEGTS / 90000 - timestampmap.LOCAL + mappingObj.mapping;

      segmentInfo.cues.forEach(function (cue) {
        // First convert cue time to TS time using the timestamp-map provided within the vtt
        cue.startTime += diff;
        cue.endTime += diff;
      });

      if (!playlist.syncInfo) {
        var firstStart = segmentInfo.cues[0].startTime;
        var lastStart = segmentInfo.cues[segmentInfo.cues.length - 1].startTime;

        playlist.syncInfo = {
          mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,
          time: Math.min(firstStart, lastStart - segment.duration)
        };
      }
    };

    return VTTSegmentLoader;
  }(SegmentLoader);

  /**
   * @file ad-cue-tags.js
   */

  /**
   * Searches for an ad cue that overlaps with the given mediaTime
   */


  var findAdCue = function findAdCue(track, mediaTime) {
    var cues = track.cues;

    for (var i = 0; i < cues.length; i++) {
      var cue = cues[i];

      if (mediaTime >= cue.adStartTime && mediaTime <= cue.adEndTime) {
        return cue;
      }
    }
    return null;
  };

  var updateAdCues = function updateAdCues(media, track) {
    var offset = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;

    if (!media.segments) {
      return;
    }

    var mediaTime = offset;
    var cue = void 0;

    for (var i = 0; i < media.segments.length; i++) {
      var segment = media.segments[i];

      if (!cue) {
        // Since the cues will span for at least the segment duration, adding a fudge
        // factor of half segment duration will prevent duplicate cues from being
        // created when timing info is not exact (e.g. cue start time initialized
        // at 10.006677, but next call mediaTime is 10.003332 )
        cue = findAdCue(track, mediaTime + segment.duration / 2);
      }

      if (cue) {
        if ('cueIn' in segment) {
          // Found a CUE-IN so end the cue
          cue.endTime = mediaTime;
          cue.adEndTime = mediaTime;
          mediaTime += segment.duration;
          cue = null;
          continue;
        }

        if (mediaTime < cue.endTime) {
          // Already processed this mediaTime for this cue
          mediaTime += segment.duration;
          continue;
        }

        // otherwise extend cue until a CUE-IN is found
        cue.endTime += segment.duration;
      } else {
        if ('cueOut' in segment) {
          cue = new window_1.VTTCue(mediaTime, mediaTime + segment.duration, segment.cueOut);
          cue.adStartTime = mediaTime;
          // Assumes tag format to be
          // #EXT-X-CUE-OUT:30
          cue.adEndTime = mediaTime + parseFloat(segment.cueOut);
          track.addCue(cue);
        }

        if ('cueOutCont' in segment) {
          // Entered into the middle of an ad cue
          var adOffset = void 0;
          var adTotal = void 0;

          // Assumes tag formate to be
          // #EXT-X-CUE-OUT-CONT:10/30

          var _segment$cueOutCont$s = segment.cueOutCont.split('/').map(parseFloat);

          adOffset = _segment$cueOutCont$s[0];
          adTotal = _segment$cueOutCont$s[1];


          cue = new window_1.VTTCue(mediaTime, mediaTime + segment.duration, '');
          cue.adStartTime = mediaTime - adOffset;
          cue.adEndTime = cue.adStartTime + adTotal;
          track.addCue(cue);
        }
      }
      mediaTime += segment.duration;
    }
  };

  /**
   * @file sync-controller.js
   */

  var tsprobe = tsInspector.inspect;

  var syncPointStrategies = [
    // Stategy "VOD": Handle the VOD-case where the sync-point is *always*
    //                the equivalence display-time 0 === segment-index 0
    {
      name: 'VOD',
      run: function run(syncController, playlist, duration$$1, currentTimeline, currentTime) {
        if (duration$$1 !== Infinity) {
          var syncPoint = {
            time: 0,
            segmentIndex: 0
          };

          return syncPoint;
        }
        return null;
      }
    },
    // Stategy "ProgramDateTime": We have a program-date-time tag in this playlist
    {
      name: 'ProgramDateTime',
      run: function run(syncController, playlist, duration$$1, currentTimeline, currentTime) {
        if (!syncController.datetimeToDisplayTime) {
          return null;
        }

        var segments = playlist.segments || [];
        var syncPoint = null;
        var lastDistance = null;

        currentTime = currentTime || 0;

        for (var i = 0; i < segments.length; i++) {
          var segment = segments[i];

          if (segment.dateTimeObject) {
            var segmentTime = segment.dateTimeObject.getTime() / 1000;
            var segmentStart = segmentTime + syncController.datetimeToDisplayTime;
            var distance = Math.abs(currentTime - segmentStart);

            // Once the distance begins to increase, we have passed
            // currentTime and can stop looking for better candidates
            if (lastDistance !== null && lastDistance < distance) {
              break;
            }

            lastDistance = distance;
            syncPoint = {
              time: segmentStart,
              segmentIndex: i
            };
          }
        }
        return syncPoint;
      }
    },
    // Stategy "Segment": We have a known time mapping for a timeline and a
    //                    segment in the current timeline with timing data
    {
      name: 'Segment',
      run: function run(syncController, playlist, duration$$1, currentTimeline, currentTime) {
        var segments = playlist.segments || [];
        var syncPoint = null;
        var lastDistance = null;

        currentTime = currentTime || 0;

        for (var i = 0; i < segments.length; i++) {
          var segment = segments[i];

          if (segment.timeline === currentTimeline && typeof segment.start !== 'undefined') {
            var distance = Math.abs(currentTime - segment.start);

            // Once the distance begins to increase, we have passed
            // currentTime and can stop looking for better candidates
            if (lastDistance !== null && lastDistance < distance) {
              break;
            }

            if (!syncPoint || lastDistance === null || lastDistance >= distance) {
              lastDistance = distance;
              syncPoint = {
                time: segment.start,
                segmentIndex: i
              };
            }
          }
        }
        return syncPoint;
      }
    },
    // Stategy "Discontinuity": We have a discontinuity with a known
    //                          display-time
    {
      name: 'Discontinuity',
      run: function run(syncController, playlist, duration$$1, currentTimeline, currentTime) {
        var syncPoint = null;

        currentTime = currentTime || 0;

        if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {
          var lastDistance = null;

          for (var i = 0; i < playlist.discontinuityStarts.length; i++) {
            var segmentIndex = playlist.discontinuityStarts[i];
            var discontinuity = playlist.discontinuitySequence + i + 1;
            var discontinuitySync = syncController.discontinuities[discontinuity];

            if (discontinuitySync) {
              var distance = Math.abs(currentTime - discontinuitySync.time);

              // Once the distance begins to increase, we have passed
              // currentTime and can stop looking for better candidates
              if (lastDistance !== null && lastDistance < distance) {
                break;
              }

              if (!syncPoint || lastDistance === null || lastDistance >= distance) {
                lastDistance = distance;
                syncPoint = {
                  time: discontinuitySync.time,
                  segmentIndex: segmentIndex
                };
              }
            }
          }
        }
        return syncPoint;
      }
    },
    // Stategy "Playlist": We have a playlist with a known mapping of
    //                     segment index to display time
    {
      name: 'Playlist',
      run: function run(syncController, playlist, duration$$1, currentTimeline, currentTime) {
        if (playlist.syncInfo) {
          var syncPoint = {
            time: playlist.syncInfo.time,
            segmentIndex: playlist.syncInfo.mediaSequence - playlist.mediaSequence
          };

          return syncPoint;
        }
        return null;
      }
    }];

  var SyncController = function (_videojs$EventTarget4) {
    inherits(SyncController, _videojs$EventTarget4);

    function SyncController() {
      classCallCheck(this, SyncController);

      // Segment Loader state variables...
      // ...for synching across variants
      var _this28 = possibleConstructorReturn(this, _videojs$EventTarget4.call(this));

      _this28.inspectCache_ = undefined;

      // ...for synching across variants
      _this28.timelines = [];
      _this28.discontinuities = [];
      _this28.datetimeToDisplayTime = null;

      _this28.logger_ = logger('SyncController');
      return _this28;
    }

    /**
     * Find a sync-point for the playlist specified
     *
     * A sync-point is defined as a known mapping from display-time to
     * a segment-index in the current playlist.
     *
     * @param {Playlist} playlist
     *        The playlist that needs a sync-point
     * @param {Number} duration
     *        Duration of the MediaSource (Infinite if playing a live source)
     * @param {Number} currentTimeline
     *        The last timeline from which a segment was loaded
     * @returns {Object}
     *          A sync-point object
     */


    SyncController.prototype.getSyncPoint = function getSyncPoint(playlist, duration$$1, currentTimeline, currentTime) {
      var syncPoints = this.runStrategies_(playlist, duration$$1, currentTimeline, currentTime);

      if (!syncPoints.length) {
        // Signal that we need to attempt to get a sync-point manually
        // by fetching a segment in the playlist and constructing
        // a sync-point from that information
        return null;
      }

      // Now find the sync-point that is closest to the currentTime because
      // that should result in the most accurate guess about which segment
      // to fetch
      return this.selectSyncPoint_(syncPoints, {key: 'time', value: currentTime});
    };

    /**
     * Calculate the amount of time that has expired off the playlist during playback
     *
     * @param {Playlist} playlist
     *        Playlist object to calculate expired from
     * @param {Number} duration
     *        Duration of the MediaSource (Infinity if playling a live source)
     * @returns {Number|null}
     *          The amount of time that has expired off the playlist during playback. Null
     *          if no sync-points for the playlist can be found.
     */


    SyncController.prototype.getExpiredTime = function getExpiredTime(playlist, duration$$1) {
      if (!playlist || !playlist.segments) {
        return null;
      }

      var syncPoints = this.runStrategies_(playlist, duration$$1, playlist.discontinuitySequence, 0);

      // Without sync-points, there is not enough information to determine the expired time
      if (!syncPoints.length) {
        return null;
      }

      var syncPoint = this.selectSyncPoint_(syncPoints, {
        key: 'segmentIndex',
        value: 0
      });

      // If the sync-point is beyond the start of the playlist, we want to subtract the
      // duration from index 0 to syncPoint.segmentIndex instead of adding.
      if (syncPoint.segmentIndex > 0) {
        syncPoint.time *= -1;
      }

      return Math.abs(syncPoint.time + sumDurations(playlist, syncPoint.segmentIndex, 0));
    };

    /**
     * Runs each sync-point strategy and returns a list of sync-points returned by the
     * strategies
     *
     * @private
     * @param {Playlist} playlist
     *        The playlist that needs a sync-point
     * @param {Number} duration
     *        Duration of the MediaSource (Infinity if playing a live source)
     * @param {Number} currentTimeline
     *        The last timeline from which a segment was loaded
     * @returns {Array}
     *          A list of sync-point objects
     */


    SyncController.prototype.runStrategies_ = function runStrategies_(playlist, duration$$1, currentTimeline, currentTime) {
      var syncPoints = [];

      // Try to find a sync-point in by utilizing various strategies...
      for (var i = 0; i < syncPointStrategies.length; i++) {
        var strategy = syncPointStrategies[i];
        var syncPoint = strategy.run(this, playlist, duration$$1, currentTimeline, currentTime);

        if (syncPoint) {
          syncPoint.strategy = strategy.name;
          syncPoints.push({
            strategy: strategy.name,
            syncPoint: syncPoint
          });
        }
      }

      return syncPoints;
    };

    /**
     * Selects the sync-point nearest the specified target
     *
     * @private
     * @param {Array} syncPoints
     *        List of sync-points to select from
     * @param {Object} target
     *        Object specifying the property and value we are targeting
     * @param {String} target.key
     *        Specifies the property to target. Must be either 'time' or 'segmentIndex'
     * @param {Number} target.value
     *        The value to target for the specified key.
     * @returns {Object}
     *          The sync-point nearest the target
     */


    SyncController.prototype.selectSyncPoint_ = function selectSyncPoint_(syncPoints, target) {
      var bestSyncPoint = syncPoints[0].syncPoint;
      var bestDistance = Math.abs(syncPoints[0].syncPoint[target.key] - target.value);
      var bestStrategy = syncPoints[0].strategy;

      for (var i = 1; i < syncPoints.length; i++) {
        var newDistance = Math.abs(syncPoints[i].syncPoint[target.key] - target.value);

        if (newDistance < bestDistance) {
          bestDistance = newDistance;
          bestSyncPoint = syncPoints[i].syncPoint;
          bestStrategy = syncPoints[i].strategy;
        }
      }

      this.logger_('syncPoint for [' + target.key + ': ' + target.value + '] chosen with strategy' + (' [' + bestStrategy + ']: [time:' + bestSyncPoint.time + ',') + (' segmentIndex:' + bestSyncPoint.segmentIndex + ']'));

      return bestSyncPoint;
    };

    /**
     * Save any meta-data present on the segments when segments leave
     * the live window to the playlist to allow for synchronization at the
     * playlist level later.
     *
     * @param {Playlist} oldPlaylist - The previous active playlist
     * @param {Playlist} newPlaylist - The updated and most current playlist
     */


    SyncController.prototype.saveExpiredSegmentInfo = function saveExpiredSegmentInfo(oldPlaylist, newPlaylist) {
      var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;

      // When a segment expires from the playlist and it has a start time
      // save that information as a possible sync-point reference in future
      for (var i = mediaSequenceDiff - 1; i >= 0; i--) {
        var lastRemovedSegment = oldPlaylist.segments[i];

        if (lastRemovedSegment && typeof lastRemovedSegment.start !== 'undefined') {
          newPlaylist.syncInfo = {
            mediaSequence: oldPlaylist.mediaSequence + i,
            time: lastRemovedSegment.start
          };
          this.logger_('playlist refresh sync: [time:' + newPlaylist.syncInfo.time + ',' + (' mediaSequence: ' + newPlaylist.syncInfo.mediaSequence + ']'));
          this.trigger('syncinfoupdate');
          break;
        }
      }
    };

    /**
     * Save the mapping from playlist's ProgramDateTime to display. This should
     * only ever happen once at the start of playback.
     *
     * @param {Playlist} playlist - The currently active playlist
     */


    SyncController.prototype.setDateTimeMapping = function setDateTimeMapping(playlist) {
      if (!this.datetimeToDisplayTime && playlist.segments && playlist.segments.length && playlist.segments[0].dateTimeObject) {
        var playlistTimestamp = playlist.segments[0].dateTimeObject.getTime() / 1000;

        this.datetimeToDisplayTime = -playlistTimestamp;
      }
    };

    /**
     * Reset the state of the inspection cache when we do a rendition
     * switch
     */


    SyncController.prototype.reset = function reset() {
      this.inspectCache_ = undefined;
    };

    /**
     * Probe or inspect a fmp4 or an mpeg2-ts segment to determine the start
     * and end of the segment in it's internal "media time". Used to generate
     * mappings from that internal "media time" to the display time that is
     * shown on the player.
     *
     * @param {SegmentInfo} segmentInfo - The current active request information
     */


    SyncController.prototype.probeSegmentInfo = function probeSegmentInfo(segmentInfo) {
      var segment = segmentInfo.segment;
      var playlist = segmentInfo.playlist;
      var timingInfo = void 0;

      if (segment.map) {
        timingInfo = this.probeMp4Segment_(segmentInfo);
      } else {
        timingInfo = this.probeTsSegment_(segmentInfo);
      }

      if (timingInfo) {
        if (this.calculateSegmentTimeMapping_(segmentInfo, timingInfo)) {
          this.saveDiscontinuitySyncInfo_(segmentInfo);

          // If the playlist does not have sync information yet, record that information
          // now with segment timing information
          if (!playlist.syncInfo) {
            playlist.syncInfo = {
              mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,
              time: segment.start
            };
          }
        }
      }

      return timingInfo;
    };

    /**
     * Probe an fmp4 or an mpeg2-ts segment to determine the start of the segment
     * in it's internal "media time".
     *
     * @private
     * @param {SegmentInfo} segmentInfo - The current active request information
     * @return {object} The start and end time of the current segment in "media time"
     */


    SyncController.prototype.probeMp4Segment_ = function probeMp4Segment_(segmentInfo) {
      var segment = segmentInfo.segment;
      var timescales = probe.timescale(segment.map.bytes);
      var startTime = probe.startTime(timescales, segmentInfo.bytes);

      if (segmentInfo.timestampOffset !== null) {
        segmentInfo.timestampOffset -= startTime;
      }

      return {
        start: startTime,
        end: startTime + segment.duration
      };
    };

    /**
     * Probe an mpeg2-ts segment to determine the start and end of the segment
     * in it's internal "media time".
     *
     * @private
     * @param {SegmentInfo} segmentInfo - The current active request information
     * @return {object} The start and end time of the current segment in "media time"
     */


    SyncController.prototype.probeTsSegment_ = function probeTsSegment_(segmentInfo) {
      var timeInfo = tsprobe(segmentInfo.bytes, this.inspectCache_);
      var segmentStartTime = void 0;
      var segmentEndTime = void 0;

      if (!timeInfo) {
        return null;
      }

      if (timeInfo.video && timeInfo.video.length === 2) {
        this.inspectCache_ = timeInfo.video[1].dts;
        segmentStartTime = timeInfo.video[0].dtsTime;
        segmentEndTime = timeInfo.video[1].dtsTime;
      } else if (timeInfo.audio && timeInfo.audio.length === 2) {
        this.inspectCache_ = timeInfo.audio[1].dts;
        segmentStartTime = timeInfo.audio[0].dtsTime;
        segmentEndTime = timeInfo.audio[1].dtsTime;
      }

      return {
        start: segmentStartTime,
        end: segmentEndTime,
        containsVideo: timeInfo.video && timeInfo.video.length === 2,
        containsAudio: timeInfo.audio && timeInfo.audio.length === 2
      };
    };

    SyncController.prototype.timestampOffsetForTimeline = function timestampOffsetForTimeline(timeline) {
      if (typeof this.timelines[timeline] === 'undefined') {
        return null;
      }
      return this.timelines[timeline].time;
    };

    SyncController.prototype.mappingForTimeline = function mappingForTimeline(timeline) {
      if (typeof this.timelines[timeline] === 'undefined') {
        return null;
      }
      return this.timelines[timeline].mapping;
    };

    /**
     * Use the "media time" for a segment to generate a mapping to "display time" and
     * save that display time to the segment.
     *
     * @private
     * @param {SegmentInfo} segmentInfo
     *        The current active request information
     * @param {object} timingInfo
     *        The start and end time of the current segment in "media time"
     * @returns {Boolean}
     *          Returns false if segment time mapping could not be calculated
     */


    SyncController.prototype.calculateSegmentTimeMapping_ = function calculateSegmentTimeMapping_(segmentInfo, timingInfo) {
      var segment = segmentInfo.segment;
      var mappingObj = this.timelines[segmentInfo.timeline];

      if (segmentInfo.timestampOffset !== null) {
        mappingObj = {
          time: segmentInfo.startOfSegment,
          mapping: segmentInfo.startOfSegment - timingInfo.start
        };
        this.timelines[segmentInfo.timeline] = mappingObj;
        this.trigger('timestampoffset');

        this.logger_('time mapping for timeline ' + segmentInfo.timeline + ': ' + ('[time: ' + mappingObj.time + '] [mapping: ' + mappingObj.mapping + ']'));

        segment.start = segmentInfo.startOfSegment;
        segment.end = timingInfo.end + mappingObj.mapping;
      } else if (mappingObj) {
        segment.start = timingInfo.start + mappingObj.mapping;
        segment.end = timingInfo.end + mappingObj.mapping;
      } else {
        return false;
      }

      return true;
    };

    /**
     * Each time we have discontinuity in the playlist, attempt to calculate the location
     * in display of the start of the discontinuity and save that. We also save an accuracy
     * value so that we save values with the most accuracy (closest to 0.)
     *
     * @private
     * @param {SegmentInfo} segmentInfo - The current active request information
     */


    SyncController.prototype.saveDiscontinuitySyncInfo_ = function saveDiscontinuitySyncInfo_(segmentInfo) {
      var playlist = segmentInfo.playlist;
      var segment = segmentInfo.segment;

      // If the current segment is a discontinuity then we know exactly where
      // the start of the range and it's accuracy is 0 (greater accuracy values
      // mean more approximation)
      if (segment.discontinuity) {
        this.discontinuities[segment.timeline] = {
          time: segment.start,
          accuracy: 0
        };
      } else if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {
        // Search for future discontinuities that we can provide better timing
        // information for and save that information for sync purposes
        for (var i = 0; i < playlist.discontinuityStarts.length; i++) {
          var segmentIndex = playlist.discontinuityStarts[i];
          var discontinuity = playlist.discontinuitySequence + i + 1;
          var mediaIndexDiff = segmentIndex - segmentInfo.mediaIndex;
          var accuracy = Math.abs(mediaIndexDiff);

          if (!this.discontinuities[discontinuity] || this.discontinuities[discontinuity].accuracy > accuracy) {
            var time = void 0;

            if (mediaIndexDiff < 0) {
              time = segment.start - sumDurations(playlist, segmentInfo.mediaIndex, segmentIndex);
            } else {
              time = segment.end + sumDurations(playlist, segmentInfo.mediaIndex + 1, segmentIndex);
            }

            this.discontinuities[discontinuity] = {
              time: time,
              accuracy: accuracy
            };
          }
        }
      }
    };

    return SyncController;
  }(videojs$1.EventTarget);

  var Decrypter$1 = new shimWorker("./decrypter-worker.worker.js", function (window, document$$1) {
    var self = this;
    var decrypterWorker = function () {

      var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

      var win;

      if (typeof window !== "undefined") {
        win = window;
      } else if (typeof commonjsGlobal !== "undefined") {
        win = commonjsGlobal;
      } else if (typeof self !== "undefined") {
        win = self;
      } else {
        win = {};
      }

      var window_1$$1 = win;

      /*
       * pkcs7.pad
       * https://github.com/brightcove/pkcs7
       *
       * Copyright (c) 2014 Brightcove
       * Licensed under the apache2 license.
       */

      /**
       * Returns the subarray of a Uint8Array without PKCS#7 padding.
       * @param padded {Uint8Array} unencrypted bytes that have been padded
       * @return {Uint8Array} the unpadded bytes
       * @see http://tools.ietf.org/html/rfc5652
       */
      function unpad(padded) {
        return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);
      }

      var classCallCheck$$1 = function classCallCheck$$1(instance, Constructor) {
        if (!(instance instanceof Constructor)) {
          throw new TypeError("Cannot call a class as a function");
        }
      };

      var createClass$$1 = function () {
        function defineProperties(target, props) {
          for (var i = 0; i < props.length; i++) {
            var descriptor = props[i];
            descriptor.enumerable = descriptor.enumerable || false;
            descriptor.configurable = true;
            if ("value" in descriptor) descriptor.writable = true;
            Object.defineProperty(target, descriptor.key, descriptor);
          }
        }

        return function (Constructor, protoProps, staticProps) {
          if (protoProps) defineProperties(Constructor.prototype, protoProps);
          if (staticProps) defineProperties(Constructor, staticProps);
          return Constructor;
        };
      }();

      var inherits$$1 = function inherits$$1(subClass, superClass) {
        if (typeof superClass !== "function" && superClass !== null) {
          throw new TypeError("Super expression must either be null or a function, not " + (typeof superClass === 'undefined' ? 'undefined' : _typeof(superClass)));
        }

        subClass.prototype = Object.create(superClass && superClass.prototype, {
          constructor: {
            value: subClass,
            enumerable: false,
            writable: true,
            configurable: true
          }
        });
        if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
      };

      var possibleConstructorReturn$$1 = function possibleConstructorReturn$$1(self, call) {
        if (!self) {
          throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
        }

        return call && ((typeof call === 'undefined' ? 'undefined' : _typeof(call)) === "object" || typeof call === "function") ? call : self;
      };

      /**
       * @file aes.js
       *
       * This file contains an adaptation of the AES decryption algorithm
       * from the Standford Javascript Cryptography Library. That work is
       * covered by the following copyright and permissions notice:
       *
       * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.
       * All rights reserved.
       *
       * Redistribution and use in source and binary forms, with or without
       * modification, are permitted provided that the following conditions are
       * met:
       *
       * 1. Redistributions of source code must retain the above copyright
       *    notice, this list of conditions and the following disclaimer.
       *
       * 2. Redistributions in binary form must reproduce the above
       *    copyright notice, this list of conditions and the following
       *    disclaimer in the documentation and/or other materials provided
       *    with the distribution.
       *
       * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
       * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
       * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
       * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE
       * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
       * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
       * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
       * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
       * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
       * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
       * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
       *
       * The views and conclusions contained in the software and documentation
       * are those of the authors and should not be interpreted as representing
       * official policies, either expressed or implied, of the authors.
       */

      /**
       * Expand the S-box tables.
       *
       * @private
       */
      var precompute = function precompute() {
        var tables = [[[], [], [], [], []], [[], [], [], [], []]];
        var encTable = tables[0];
        var decTable = tables[1];
        var sbox = encTable[4];
        var sboxInv = decTable[4];
        var i = void 0;
        var x = void 0;
        var xInv = void 0;
        var d = [];
        var th = [];
        var x2 = void 0;
        var x4 = void 0;
        var x8 = void 0;
        var s = void 0;
        var tEnc = void 0;
        var tDec = void 0;

        // Compute double and third tables
        for (i = 0; i < 256; i++) {
          th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;
        }

        for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {
          // Compute sbox
          s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;
          s = s >> 8 ^ s & 255 ^ 99;
          sbox[x] = s;
          sboxInv[s] = x;

          // Compute MixColumns
          x8 = d[x4 = d[x2 = d[x]]];
          tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;
          tEnc = d[s] * 0x101 ^ s * 0x1010100;

          for (i = 0; i < 4; i++) {
            encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;
            decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;
          }
        }

        // Compactify. Considerable speedup on Firefox.
        for (i = 0; i < 5; i++) {
          encTable[i] = encTable[i].slice(0);
          decTable[i] = decTable[i].slice(0);
        }
        return tables;
      };
      var aesTables = null;

      /**
       * Schedule out an AES key for both encryption and decryption. This
       * is a low-level class. Use a cipher mode to do bulk encryption.
       *
       * @class AES
       * @param key {Array} The key as an array of 4, 6 or 8 words.
       */

      var AES = function () {
        function AES(key) {
          classCallCheck$$1(this, AES);

          /**
           * The expanded S-box and inverse S-box tables. These will be computed
           * on the client so that we don't have to send them down the wire.
           *
           * There are two tables, _tables[0] is for encryption and
           * _tables[1] is for decryption.
           *
           * The first 4 sub-tables are the expanded S-box with MixColumns. The
           * last (_tables[01][4]) is the S-box itself.
           *
           * @private
           */
          // if we have yet to precompute the S-box tables
          // do so now
          if (!aesTables) {
            aesTables = precompute();
          }
          // then make a copy of that object for use
          this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];
          var i = void 0;
          var j = void 0;
          var tmp = void 0;
          var encKey = void 0;
          var decKey = void 0;
          var sbox = this._tables[0][4];
          var decTable = this._tables[1];
          var keyLen = key.length;
          var rcon = 1;

          if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {
            throw new Error('Invalid aes key size');
          }

          encKey = key.slice(0);
          decKey = [];
          this._key = [encKey, decKey];

          // schedule encryption keys
          for (i = keyLen; i < 4 * keyLen + 28; i++) {
            tmp = encKey[i - 1];

            // apply sbox
            if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {
              tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255];

              // shift rows and add rcon
              if (i % keyLen === 0) {
                tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;
                rcon = rcon << 1 ^ (rcon >> 7) * 283;
              }
            }

            encKey[i] = encKey[i - keyLen] ^ tmp;
          }

          // schedule decryption keys
          for (j = 0; i; j++, i--) {
            tmp = encKey[j & 3 ? i : i - 4];
            if (i <= 4 || j < 4) {
              decKey[j] = tmp;
            } else {
              decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];
            }
          }
        }

        /**
         * Decrypt 16 bytes, specified as four 32-bit words.
         *
         * @param {Number} encrypted0 the first word to decrypt
         * @param {Number} encrypted1 the second word to decrypt
         * @param {Number} encrypted2 the third word to decrypt
         * @param {Number} encrypted3 the fourth word to decrypt
         * @param {Int32Array} out the array to write the decrypted words
         * into
         * @param {Number} offset the offset into the output array to start
         * writing results
         * @return {Array} The plaintext.
         */

        AES.prototype.decrypt = function decrypt$$1(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {
          var key = this._key[1];
          // state variables a,b,c,d are loaded with pre-whitened data
          var a = encrypted0 ^ key[0];
          var b = encrypted3 ^ key[1];
          var c = encrypted2 ^ key[2];
          var d = encrypted1 ^ key[3];
          var a2 = void 0;
          var b2 = void 0;
          var c2 = void 0;

          // key.length === 2 ?
          var nInnerRounds = key.length / 4 - 2;
          var i = void 0;
          var kIndex = 4;
          var table = this._tables[1];

          // load up the tables
          var table0 = table[0];
          var table1 = table[1];
          var table2 = table[2];
          var table3 = table[3];
          var sbox = table[4];

          // Inner rounds. Cribbed from OpenSSL.
          for (i = 0; i < nInnerRounds; i++) {
            a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];
            b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];
            c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];
            d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];
            kIndex += 4;
            a = a2;
            b = b2;
            c = c2;
          }

          // Last round.
          for (i = 0; i < 4; i++) {
            out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];
            a2 = a;
            a = b;
            b = c;
            c = d;
            d = a2;
          }
        };

        return AES;
      }();

      /**
       * @file stream.js
       */
      /**
       * A lightweight readable stream implemention that handles event dispatching.
       *
       * @class Stream
       */
      var Stream = function () {
        function Stream() {
          classCallCheck$$1(this, Stream);

          this.listeners = {};
        }

        /**
         * Add a listener for a specified event type.
         *
         * @param {String} type the event name
         * @param {Function} listener the callback to be invoked when an event of
         * the specified type occurs
         */

        Stream.prototype.on = function on(type, listener) {
          if (!this.listeners[type]) {
            this.listeners[type] = [];
          }
          this.listeners[type].push(listener);
        };

        /**
         * Remove a listener for a specified event type.
         *
         * @param {String} type the event name
         * @param {Function} listener  a function previously registered for this
         * type of event through `on`
         * @return {Boolean} if we could turn it off or not
         */

        Stream.prototype.off = function off(type, listener) {
          if (!this.listeners[type]) {
            return false;
          }

          var index = this.listeners[type].indexOf(listener);

          this.listeners[type].splice(index, 1);
          return index > -1;
        };

        /**
         * Trigger an event of the specified type on this stream. Any additional
         * arguments to this function are passed as parameters to event listeners.
         *
         * @param {String} type the event name
         */

        Stream.prototype.trigger = function trigger(type) {
          var callbacks = this.listeners[type];

          if (!callbacks) {
            return;
          }

          // Slicing the arguments on every invocation of this method
          // can add a significant amount of overhead. Avoid the
          // intermediate object creation for the common case of a
          // single callback argument
          if (arguments.length === 2) {
            var length = callbacks.length;

            for (var i = 0; i < length; ++i) {
              callbacks[i].call(this, arguments[1]);
            }
          } else {
            var args = Array.prototype.slice.call(arguments, 1);
            var _length = callbacks.length;

            for (var _i = 0; _i < _length; ++_i) {
              callbacks[_i].apply(this, args);
            }
          }
        };

        /**
         * Destroys the stream and cleans up.
         */

        Stream.prototype.dispose = function dispose() {
          this.listeners = {};
        };
        /**
         * Forwards all `data` events on this stream to the destination stream. The
         * destination stream should provide a method `push` to receive the data
         * events as they arrive.
         *
         * @param {Stream} destination the stream that will receive all `data` events
         * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options
         */

        Stream.prototype.pipe = function pipe(destination) {
          this.on('data', function (data) {
            destination.push(data);
          });
        };

        return Stream;
      }();

      /**
       * @file async-stream.js
       */
      /**
       * A wrapper around the Stream class to use setTiemout
       * and run stream "jobs" Asynchronously
       *
       * @class AsyncStream
       * @extends Stream
       */

      var AsyncStream$$1 = function (_Stream) {
        inherits$$1(AsyncStream$$1, _Stream);

        function AsyncStream$$1() {
          classCallCheck$$1(this, AsyncStream$$1);

          var _this = possibleConstructorReturn$$1(this, _Stream.call(this, Stream));

          _this.jobs = [];
          _this.delay = 1;
          _this.timeout_ = null;
          return _this;
        }

        /**
         * process an async job
         *
         * @private
         */

        AsyncStream$$1.prototype.processJob_ = function processJob_() {
          this.jobs.shift()();
          if (this.jobs.length) {
            this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);
          } else {
            this.timeout_ = null;
          }
        };

        /**
         * push a job into the stream
         *
         * @param {Function} job the job to push into the stream
         */

        AsyncStream$$1.prototype.push = function push(job) {
          this.jobs.push(job);
          if (!this.timeout_) {
            this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);
          }
        };

        return AsyncStream$$1;
      }(Stream);

      /**
       * @file decrypter.js
       *
       * An asynchronous implementation of AES-128 CBC decryption with
       * PKCS#7 padding.
       */

      /**
       * Convert network-order (big-endian) bytes into their little-endian
       * representation.
       */
      var ntoh = function ntoh(word) {
        return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;
      };

      /**
       * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.
       *
       * @param {Uint8Array} encrypted the encrypted bytes
       * @param {Uint32Array} key the bytes of the decryption key
       * @param {Uint32Array} initVector the initialization vector (IV) to
       * use for the first round of CBC.
       * @return {Uint8Array} the decrypted bytes
       *
       * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard
       * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29
       * @see https://tools.ietf.org/html/rfc2315
       */
      var decrypt$$1 = function decrypt$$1(encrypted, key, initVector) {
        // word-level access to the encrypted bytes
        var encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);

        var decipher = new AES(Array.prototype.slice.call(key));

        // byte and word-level access for the decrypted output
        var decrypted = new Uint8Array(encrypted.byteLength);
        var decrypted32 = new Int32Array(decrypted.buffer);

        // temporary variables for working with the IV, encrypted, and
        // decrypted data
        var init0 = void 0;
        var init1 = void 0;
        var init2 = void 0;
        var init3 = void 0;
        var encrypted0 = void 0;
        var encrypted1 = void 0;
        var encrypted2 = void 0;
        var encrypted3 = void 0;

        // iteration variable
        var wordIx = void 0;

        // pull out the words of the IV to ensure we don't modify the
        // passed-in reference and easier access
        init0 = initVector[0];
        init1 = initVector[1];
        init2 = initVector[2];
        init3 = initVector[3];

        // decrypt four word sequences, applying cipher-block chaining (CBC)
        // to each decrypted block
        for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {
          // convert big-endian (network order) words into little-endian
          // (javascript order)
          encrypted0 = ntoh(encrypted32[wordIx]);
          encrypted1 = ntoh(encrypted32[wordIx + 1]);
          encrypted2 = ntoh(encrypted32[wordIx + 2]);
          encrypted3 = ntoh(encrypted32[wordIx + 3]);

          // decrypt the block
          decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx);

          // XOR with the IV, and restore network byte-order to obtain the
          // plaintext
          decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);
          decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);
          decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);
          decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3);

          // setup the IV for the next round
          init0 = encrypted0;
          init1 = encrypted1;
          init2 = encrypted2;
          init3 = encrypted3;
        }

        return decrypted;
      };

      /**
       * The `Decrypter` class that manages decryption of AES
       * data through `AsyncStream` objects and the `decrypt`
       * function
       *
       * @param {Uint8Array} encrypted the encrypted bytes
       * @param {Uint32Array} key the bytes of the decryption key
       * @param {Uint32Array} initVector the initialization vector (IV) to
       * @param {Function} done the function to run when done
       * @class Decrypter
       */

      var Decrypter$$1 = function () {
        function Decrypter$$1(encrypted, key, initVector, done) {
          classCallCheck$$1(this, Decrypter$$1);

          var step = Decrypter$$1.STEP;
          var encrypted32 = new Int32Array(encrypted.buffer);
          var decrypted = new Uint8Array(encrypted.byteLength);
          var i = 0;

          this.asyncStream_ = new AsyncStream$$1();

          // split up the encryption job and do the individual chunks asynchronously
          this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));
          for (i = step; i < encrypted32.length; i += step) {
            initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);
            this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));
          }
          // invoke the done() callback when everything is finished
          this.asyncStream_.push(function () {
            // remove pkcs#7 padding from the decrypted bytes
            done(null, unpad(decrypted));
          });
        }

        /**
         * a getter for step the maximum number of bytes to process at one time
         *
         * @return {Number} the value of step 32000
         */

        /**
         * @private
         */
        Decrypter$$1.prototype.decryptChunk_ = function decryptChunk_(encrypted, key, initVector, decrypted) {
          return function () {
            var bytes = decrypt$$1(encrypted, key, initVector);

            decrypted.set(bytes, encrypted.byteOffset);
          };
        };

        createClass$$1(Decrypter$$1, null, [{
          key: 'STEP',
          get: function get$$1() {
            // 4 * 8000;
            return 32000;
          }
        }]);
        return Decrypter$$1;
      }();

      /**
       * @file bin-utils.js
       */

      /**
       * Creates an object for sending to a web worker modifying properties that are TypedArrays
       * into a new object with seperated properties for the buffer, byteOffset, and byteLength.
       *
       * @param {Object} message
       *        Object of properties and values to send to the web worker
       * @return {Object}
       *         Modified message with TypedArray values expanded
       * @function createTransferableMessage
       */
      var createTransferableMessage = function createTransferableMessage(message) {
        var transferable = {};

        Object.keys(message).forEach(function (key) {
          var value = message[key];

          if (ArrayBuffer.isView(value)) {
            transferable[key] = {
              bytes: value.buffer,
              byteOffset: value.byteOffset,
              byteLength: value.byteLength
            };
          } else {
            transferable[key] = value;
          }
        });

        return transferable;
      };

      /**
       * Our web worker interface so that things can talk to aes-decrypter
       * that will be running in a web worker. the scope is passed to this by
       * webworkify.
       *
       * @param {Object} self
       *        the scope for the web worker
       */
      var DecrypterWorker = function DecrypterWorker(self) {
        self.onmessage = function (event) {
          var data = event.data;
          var encrypted = new Uint8Array(data.encrypted.bytes, data.encrypted.byteOffset, data.encrypted.byteLength);
          var key = new Uint32Array(data.key.bytes, data.key.byteOffset, data.key.byteLength / 4);
          var iv = new Uint32Array(data.iv.bytes, data.iv.byteOffset, data.iv.byteLength / 4);

          /* eslint-disable no-new, handle-callback-err */
          new Decrypter$$1(encrypted, key, iv, function (err, bytes) {
            window_1$$1.postMessage(createTransferableMessage({
              source: data.source,
              decrypted: bytes
            }), [bytes.buffer]);
          });
          /* eslint-enable */
        };
      };

      var decrypterWorker = new DecrypterWorker(self);

      return decrypterWorker;
    }();
  });

  /**
   * Convert the properties of an HLS track into an audioTrackKind.
   *
   * @private
   */
  var audioTrackKind_ = function audioTrackKind_(properties) {
    var kind = properties.default ? 'main' : 'alternative';

    if (properties.characteristics && properties.characteristics.indexOf('public.accessibility.describes-video') >= 0) {
      kind = 'main-desc';
    }

    return kind;
  };

  /**
   * Pause provided segment loader and playlist loader if active
   *
   * @param {SegmentLoader} segmentLoader
   *        SegmentLoader to pause
   * @param {Object} mediaType
   *        Active media type
   * @function stopLoaders
   */
  var stopLoaders = function stopLoaders(segmentLoader, mediaType) {
    segmentLoader.abort();
    segmentLoader.pause();

    if (mediaType && mediaType.activePlaylistLoader) {
      mediaType.activePlaylistLoader.pause();
      mediaType.activePlaylistLoader = null;
    }
  };

  /**
   * Start loading provided segment loader and playlist loader
   *
   * @param {PlaylistLoader} playlistLoader
   *        PlaylistLoader to start loading
   * @param {Object} mediaType
   *        Active media type
   * @function startLoaders
   */
  var startLoaders = function startLoaders(playlistLoader, mediaType) {
    // Segment loader will be started after `loadedmetadata` or `loadedplaylist` from the
    // playlist loader
    mediaType.activePlaylistLoader = playlistLoader;
    playlistLoader.load();
  };

  /**
   * Returns a function to be called when the media group changes. It performs a
   * non-destructive (preserve the buffer) resync of the SegmentLoader. This is because a
   * change of group is merely a rendition switch of the same content at another encoding,
   * rather than a change of content, such as switching audio from English to Spanish.
   *
   * @param {String} type
   *        MediaGroup type
   * @param {Object} settings
   *        Object containing required information for media groups
   * @return {Function}
   *         Handler for a non-destructive resync of SegmentLoader when the active media
   *         group changes.
   * @function onGroupChanged
   */
  var onGroupChanged = function onGroupChanged(type, settings) {
    return function () {
      var _settings$segmentLoad = settings.segmentLoaders,
        segmentLoader = _settings$segmentLoad[type],
        mainSegmentLoader = _settings$segmentLoad.main,
        mediaType = settings.mediaTypes[type];

      var activeTrack = mediaType.activeTrack();
      var activeGroup = mediaType.activeGroup(activeTrack);
      var previousActiveLoader = mediaType.activePlaylistLoader;

      stopLoaders(segmentLoader, mediaType);

      if (!activeGroup) {
        // there is no group active
        return;
      }

      if (!activeGroup.playlistLoader) {
        if (previousActiveLoader) {
          // The previous group had a playlist loader but the new active group does not
          // this means we are switching from demuxed to muxed audio. In this case we want to
          // do a destructive reset of the main segment loader and not restart the audio
          // loaders.
          mainSegmentLoader.resetEverything();
        }
        return;
      }

      // Non-destructive resync
      segmentLoader.resyncLoader();

      startLoaders(activeGroup.playlistLoader, mediaType);
    };
  };

  /**
   * Returns a function to be called when the media track changes. It performs a
   * destructive reset of the SegmentLoader to ensure we start loading as close to
   * currentTime as possible.
   *
   * @param {String} type
   *        MediaGroup type
   * @param {Object} settings
   *        Object containing required information for media groups
   * @return {Function}
   *         Handler for a destructive reset of SegmentLoader when the active media
   *         track changes.
   * @function onTrackChanged
   */
  var onTrackChanged = function onTrackChanged(type, settings) {
    return function () {
      var _settings$segmentLoad2 = settings.segmentLoaders,
        segmentLoader = _settings$segmentLoad2[type],
        mainSegmentLoader = _settings$segmentLoad2.main,
        mediaType = settings.mediaTypes[type];

      var activeTrack = mediaType.activeTrack();
      var activeGroup = mediaType.activeGroup(activeTrack);
      var previousActiveLoader = mediaType.activePlaylistLoader;

      stopLoaders(segmentLoader, mediaType);

      if (!activeGroup) {
        // there is no group active so we do not want to restart loaders
        return;
      }

      if (!activeGroup.playlistLoader) {
        // when switching from demuxed audio/video to muxed audio/video (noted by no playlist
        // loader for the audio group), we want to do a destructive reset of the main segment
        // loader and not restart the audio loaders
        mainSegmentLoader.resetEverything();
        return;
      }

      if (previousActiveLoader === activeGroup.playlistLoader) {
        // Nothing has actually changed. This can happen because track change events can fire
        // multiple times for a "single" change. One for enabling the new active track, and
        // one for disabling the track that was active
        startLoaders(activeGroup.playlistLoader, mediaType);
        return;
      }

      if (segmentLoader.track) {
        // For WebVTT, set the new text track in the segmentloader
        segmentLoader.track(activeTrack);
      }

      // destructive reset
      segmentLoader.resetEverything();

      startLoaders(activeGroup.playlistLoader, mediaType);
    };
  };

  var onError = {
    /**
     * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters
     * an error.
     *
     * @param {String} type
     *        MediaGroup type
     * @param {Object} settings
     *        Object containing required information for media groups
     * @return {Function}
     *         Error handler. Logs warning (or error if the playlist is blacklisted) to
     *         console and switches back to default audio track.
     * @function onError.AUDIO
     */
    AUDIO: function AUDIO(type, settings) {
      return function () {
        var segmentLoader = settings.segmentLoaders[type],
          mediaType = settings.mediaTypes[type],
          blacklistCurrentPlaylist = settings.blacklistCurrentPlaylist;


        stopLoaders(segmentLoader, mediaType);

        // switch back to default audio track
        var activeTrack = mediaType.activeTrack();
        var activeGroup = mediaType.activeGroup();
        var id = (activeGroup.filter(function (group) {
          return group.default;
        })[0] || activeGroup[0]).id;
        var defaultTrack = mediaType.tracks[id];

        if (activeTrack === defaultTrack) {
          // Default track encountered an error. All we can do now is blacklist the current
          // rendition and hope another will switch audio groups
          blacklistCurrentPlaylist({
            message: 'Problem encountered loading the default audio track.'
          });
          return;
        }

        videojs$1.log.warn('Problem encountered loading the alternate audio track.' + 'Switching back to default.');

        for (var trackId in mediaType.tracks) {
          mediaType.tracks[trackId].enabled = mediaType.tracks[trackId] === defaultTrack;
        }

        mediaType.onTrackChanged();
      };
    },
    /**
     * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters
     * an error.
     *
     * @param {String} type
     *        MediaGroup type
     * @param {Object} settings
     *        Object containing required information for media groups
     * @return {Function}
     *         Error handler. Logs warning to console and disables the active subtitle track
     * @function onError.SUBTITLES
     */
    SUBTITLES: function SUBTITLES(type, settings) {
      return function () {
        var segmentLoader = settings.segmentLoaders[type],
          mediaType = settings.mediaTypes[type];


        videojs$1.log.warn('Problem encountered loading the subtitle track.' + 'Disabling subtitle track.');

        stopLoaders(segmentLoader, mediaType);

        var track = mediaType.activeTrack();

        if (track) {
          track.mode = 'disabled';
        }

        mediaType.onTrackChanged();
      };
    }
  };

  var setupListeners = {
    /**
     * Setup event listeners for audio playlist loader
     *
     * @param {String} type
     *        MediaGroup type
     * @param {PlaylistLoader|null} playlistLoader
     *        PlaylistLoader to register listeners on
     * @param {Object} settings
     *        Object containing required information for media groups
     * @function setupListeners.AUDIO
     */
    AUDIO: function AUDIO(type, playlistLoader, settings) {
      if (!playlistLoader) {
        // no playlist loader means audio will be muxed with the video
        return;
      }

      var tech = settings.tech,
        requestOptions = settings.requestOptions,
        segmentLoader = settings.segmentLoaders[type];


      playlistLoader.on('loadedmetadata', function () {
        var media = playlistLoader.media();

        segmentLoader.playlist(media, requestOptions);

        // if the video is already playing, or if this isn't a live video and preload
        // permits, start downloading segments
        if (!tech.paused() || media.endList && tech.preload() !== 'none') {
          segmentLoader.load();
        }
      });

      playlistLoader.on('loadedplaylist', function () {
        segmentLoader.playlist(playlistLoader.media(), requestOptions);

        // If the player isn't paused, ensure that the segment loader is running
        if (!tech.paused()) {
          segmentLoader.load();
        }
      });

      playlistLoader.on('error', onError[type](type, settings));
    },
    /**
     * Setup event listeners for subtitle playlist loader
     *
     * @param {String} type
     *        MediaGroup type
     * @param {PlaylistLoader|null} playlistLoader
     *        PlaylistLoader to register listeners on
     * @param {Object} settings
     *        Object containing required information for media groups
     * @function setupListeners.SUBTITLES
     */
    SUBTITLES: function SUBTITLES(type, playlistLoader, settings) {
      var tech = settings.tech,
        requestOptions = settings.requestOptions,
        segmentLoader = settings.segmentLoaders[type],
        mediaType = settings.mediaTypes[type];


      playlistLoader.on('loadedmetadata', function () {
        var media = playlistLoader.media();

        segmentLoader.playlist(media, requestOptions);
        segmentLoader.track(mediaType.activeTrack());

        // if the video is already playing, or if this isn't a live video and preload
        // permits, start downloading segments
        if (!tech.paused() || media.endList && tech.preload() !== 'none') {
          segmentLoader.load();
        }
      });

      playlistLoader.on('loadedplaylist', function () {
        segmentLoader.playlist(playlistLoader.media(), requestOptions);

        // If the player isn't paused, ensure that the segment loader is running
        if (!tech.paused()) {
          segmentLoader.load();
        }
      });

      playlistLoader.on('error', onError[type](type, settings));
    }
  };

  var byGroupId = function byGroupId(type, groupId) {
    return function (playlist) {
      return playlist.attributes[type] === groupId;
    };
  };

  var byResolvedUri = function byResolvedUri(resolvedUri) {
    return function (playlist) {
      return playlist.resolvedUri === resolvedUri;
    };
  };

  var initialize = {
    /**
     * Setup PlaylistLoaders and AudioTracks for the audio groups
     *
     * @param {String} type
     *        MediaGroup type
     * @param {Object} settings
     *        Object containing required information for media groups
     * @function initialize.AUDIO
     */
    'AUDIO': function AUDIO(type, settings) {
      var hls = settings.hls,
        sourceType = settings.sourceType,
        segmentLoader = settings.segmentLoaders[type],
        withCredentials = settings.requestOptions.withCredentials,
        _settings$master = settings.master,
        mediaGroups = _settings$master.mediaGroups,
        playlists = _settings$master.playlists,
        _settings$mediaTypes$ = settings.mediaTypes[type],
        groups = _settings$mediaTypes$.groups,
        tracks = _settings$mediaTypes$.tracks,
        masterPlaylistLoader = settings.masterPlaylistLoader;

      // force a default if we have none

      if (!mediaGroups[type] || Object.keys(mediaGroups[type]).length === 0) {
        mediaGroups[type] = {main: {default: {default: true}}};
      }

      for (var groupId in mediaGroups[type]) {
        if (!groups[groupId]) {
          groups[groupId] = [];
        }

        // List of playlists that have an AUDIO attribute value matching the current
        // group ID
        var groupPlaylists = playlists.filter(byGroupId(type, groupId));

        for (var variantLabel in mediaGroups[type][groupId]) {
          var properties = mediaGroups[type][groupId][variantLabel];

          // List of playlists for the current group ID that have a matching uri with
          // this alternate audio variant
          var matchingPlaylists = groupPlaylists.filter(byResolvedUri(properties.resolvedUri));

          if (matchingPlaylists.length) {
            // If there is a playlist that has the same uri as this audio variant, assume
            // that the playlist is audio only. We delete the resolvedUri property here
            // to prevent a playlist loader from being created so that we don't have
            // both the main and audio segment loaders loading the same audio segments
            // from the same playlist.
            delete properties.resolvedUri;
          }

          var playlistLoader = void 0;

          if (properties.resolvedUri) {
            playlistLoader = new PlaylistLoader(properties.resolvedUri, hls, withCredentials);
          } else if (properties.playlists && sourceType === 'dash') {
            playlistLoader = new DashPlaylistLoader(properties.playlists[0], hls, withCredentials, masterPlaylistLoader);
          } else {
            // no resolvedUri means the audio is muxed with the video when using this
            // audio track
            playlistLoader = null;
          }

          properties = videojs$1.mergeOptions({id: variantLabel, playlistLoader: playlistLoader}, properties);

          setupListeners[type](type, properties.playlistLoader, settings);

          groups[groupId].push(properties);

          if (typeof tracks[variantLabel] === 'undefined') {
            var track = new videojs$1.AudioTrack({
              id: variantLabel,
              kind: audioTrackKind_(properties),
              enabled: false,
              language: properties.language,
              default: properties.default,
              label: variantLabel
            });

            tracks[variantLabel] = track;
          }
        }
      }

      // setup single error event handler for the segment loader
      segmentLoader.on('error', onError[type](type, settings));
    },
    /**
     * Setup PlaylistLoaders and TextTracks for the subtitle groups
     *
     * @param {String} type
     *        MediaGroup type
     * @param {Object} settings
     *        Object containing required information for media groups
     * @function initialize.SUBTITLES
     */
    'SUBTITLES': function SUBTITLES(type, settings) {
      var tech = settings.tech,
        hls = settings.hls,
        sourceType = settings.sourceType,
        segmentLoader = settings.segmentLoaders[type],
        withCredentials = settings.requestOptions.withCredentials,
        mediaGroups = settings.master.mediaGroups,
        _settings$mediaTypes$2 = settings.mediaTypes[type],
        groups = _settings$mediaTypes$2.groups,
        tracks = _settings$mediaTypes$2.tracks,
        masterPlaylistLoader = settings.masterPlaylistLoader;


      for (var groupId in mediaGroups[type]) {
        if (!groups[groupId]) {
          groups[groupId] = [];
        }

        for (var variantLabel in mediaGroups[type][groupId]) {
          if (mediaGroups[type][groupId][variantLabel].forced) {
            // Subtitle playlists with the forced attribute are not selectable in Safari.
            // According to Apple's HLS Authoring Specification:
            //   If content has forced subtitles and regular subtitles in a given language,
            //   the regular subtitles track in that language MUST contain both the forced
            //   subtitles and the regular subtitles for that language.
            // Because of this requirement and that Safari does not add forced subtitles,
            // forced subtitles are skipped here to maintain consistent experience across
            // all platforms
            continue;
          }

          var properties = mediaGroups[type][groupId][variantLabel];

          var playlistLoader = void 0;

          if (sourceType === 'hls') {
            playlistLoader = new PlaylistLoader(properties.resolvedUri, hls, withCredentials);
          } else if (sourceType === 'dash') {
            playlistLoader = new DashPlaylistLoader(properties.playlists[0], hls, withCredentials, masterPlaylistLoader);
          }

          properties = videojs$1.mergeOptions({
            id: variantLabel,
            playlistLoader: playlistLoader
          }, properties);

          setupListeners[type](type, properties.playlistLoader, settings);

          groups[groupId].push(properties);

          if (typeof tracks[variantLabel] === 'undefined') {
            var track = tech.addRemoteTextTrack({
              id: variantLabel,
              kind: 'subtitles',
              enabled: false,
              language: properties.language,
              label: variantLabel
            }, false).track;

            tracks[variantLabel] = track;
          }
        }
      }

      // setup single error event handler for the segment loader
      segmentLoader.on('error', onError[type](type, settings));
    },
    /**
     * Setup TextTracks for the closed-caption groups
     *
     * @param {String} type
     *        MediaGroup type
     * @param {Object} settings
     *        Object containing required information for media groups
     * @function initialize['CLOSED-CAPTIONS']
     */
    'CLOSED-CAPTIONS': function CLOSEDCAPTIONS(type, settings) {
      var tech = settings.tech,
        mediaGroups = settings.master.mediaGroups,
        _settings$mediaTypes$3 = settings.mediaTypes[type],
        groups = _settings$mediaTypes$3.groups,
        tracks = _settings$mediaTypes$3.tracks;


      for (var groupId in mediaGroups[type]) {
        if (!groups[groupId]) {
          groups[groupId] = [];
        }

        for (var variantLabel in mediaGroups[type][groupId]) {
          var properties = mediaGroups[type][groupId][variantLabel];

          // We only support CEA608 captions for now, so ignore anything that
          // doesn't use a CCx INSTREAM-ID
          if (!properties.instreamId.match(/CC\d/)) {
            continue;
          }

          // No PlaylistLoader is required for Closed-Captions because the captions are
          // embedded within the video stream
          groups[groupId].push(videojs$1.mergeOptions({id: variantLabel}, properties));

          if (typeof tracks[variantLabel] === 'undefined') {
            var track = tech.addRemoteTextTrack({
              id: properties.instreamId,
              kind: 'captions',
              enabled: false,
              language: properties.language,
              label: variantLabel
            }, false).track;

            tracks[variantLabel] = track;
          }
        }
      }
    }
  };

  /**
   * Returns a function used to get the active group of the provided type
   *
   * @param {String} type
   *        MediaGroup type
   * @param {Object} settings
   *        Object containing required information for media groups
   * @return {Function}
   *         Function that returns the active media group for the provided type. Takes an
   *         optional parameter {TextTrack} track. If no track is provided, a list of all
   *         variants in the group, otherwise the variant corresponding to the provided
   *         track is returned.
   * @function activeGroup
   */
  var activeGroup = function activeGroup(type, settings) {
    return function (track) {
      var masterPlaylistLoader = settings.masterPlaylistLoader,
        groups = settings.mediaTypes[type].groups;


      var media = masterPlaylistLoader.media();

      if (!media) {
        return null;
      }

      var variants = null;

      if (media.attributes[type]) {
        variants = groups[media.attributes[type]];
      }

      variants = variants || groups.main;

      if (typeof track === 'undefined') {
        return variants;
      }

      if (track === null) {
        // An active track was specified so a corresponding group is expected. track === null
        // means no track is currently active so there is no corresponding group
        return null;
      }

      return variants.filter(function (props) {
        return props.id === track.id;
      })[0] || null;
    };
  };

  var activeTrack = {
    /**
     * Returns a function used to get the active track of type provided
     *
     * @param {String} type
     *        MediaGroup type
     * @param {Object} settings
     *        Object containing required information for media groups
     * @return {Function}
     *         Function that returns the active media track for the provided type. Returns
     *         null if no track is active
     * @function activeTrack.AUDIO
     */
    AUDIO: function AUDIO(type, settings) {
      return function () {
        var tracks = settings.mediaTypes[type].tracks;


        for (var id in tracks) {
          if (tracks[id].enabled) {
            return tracks[id];
          }
        }

        return null;
      };
    },
    /**
     * Returns a function used to get the active track of type provided
     *
     * @param {String} type
     *        MediaGroup type
     * @param {Object} settings
     *        Object containing required information for media groups
     * @return {Function}
     *         Function that returns the active media track for the provided type. Returns
     *         null if no track is active
     * @function activeTrack.SUBTITLES
     */
    SUBTITLES: function SUBTITLES(type, settings) {
      return function () {
        var tracks = settings.mediaTypes[type].tracks;


        for (var id in tracks) {
          if (tracks[id].mode === 'showing') {
            return tracks[id];
          }
        }

        return null;
      };
    }
  };

  /**
   * Setup PlaylistLoaders and Tracks for media groups (Audio, Subtitles,
   * Closed-Captions) specified in the master manifest.
   *
   * @param {Object} settings
   *        Object containing required information for setting up the media groups
   * @param {SegmentLoader} settings.segmentLoaders.AUDIO
   *        Audio segment loader
   * @param {SegmentLoader} settings.segmentLoaders.SUBTITLES
   *        Subtitle segment loader
   * @param {SegmentLoader} settings.segmentLoaders.main
   *        Main segment loader
   * @param {Tech} settings.tech
   *        The tech of the player
   * @param {Object} settings.requestOptions
   *        XHR request options used by the segment loaders
   * @param {PlaylistLoader} settings.masterPlaylistLoader
   *        PlaylistLoader for the master source
   * @param {HlsHandler} settings.hls
   *        HLS SourceHandler
   * @param {Object} settings.master
   *        The parsed master manifest
   * @param {Object} settings.mediaTypes
   *        Object to store the loaders, tracks, and utility methods for each media type
   * @param {Function} settings.blacklistCurrentPlaylist
   *        Blacklists the current rendition and forces a rendition switch.
   * @function setupMediaGroups
   */
  var setupMediaGroups = function setupMediaGroups(settings) {
    ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {
      initialize[type](type, settings);
    });

    var mediaTypes = settings.mediaTypes,
      masterPlaylistLoader = settings.masterPlaylistLoader,
      tech = settings.tech,
      hls = settings.hls;

    // setup active group and track getters and change event handlers

    ['AUDIO', 'SUBTITLES'].forEach(function (type) {
      mediaTypes[type].activeGroup = activeGroup(type, settings);
      mediaTypes[type].activeTrack = activeTrack[type](type, settings);
      mediaTypes[type].onGroupChanged = onGroupChanged(type, settings);
      mediaTypes[type].onTrackChanged = onTrackChanged(type, settings);
    });

    // DO NOT enable the default subtitle or caption track.
    // DO enable the default audio track
    var audioGroup = mediaTypes.AUDIO.activeGroup();
    var groupId = (audioGroup.filter(function (group) {
      return group.default;
    })[0] || audioGroup[0]).id;

    mediaTypes.AUDIO.tracks[groupId].enabled = true;
    mediaTypes.AUDIO.onTrackChanged();

    masterPlaylistLoader.on('mediachange', function () {
      ['AUDIO', 'SUBTITLES'].forEach(function (type) {
        return mediaTypes[type].onGroupChanged();
      });
    });

    // custom audio track change event handler for usage event
    var onAudioTrackChanged = function onAudioTrackChanged() {
      mediaTypes.AUDIO.onTrackChanged();
      tech.trigger({type: 'usage', name: 'hls-audio-change'});
    };

    tech.audioTracks().addEventListener('change', onAudioTrackChanged);
    tech.remoteTextTracks().addEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);

    hls.on('dispose', function () {
      tech.audioTracks().removeEventListener('change', onAudioTrackChanged);
      tech.remoteTextTracks().removeEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);
    });

    // clear existing audio tracks and add the ones we just created
    tech.clearTracks('audio');

    for (var id in mediaTypes.AUDIO.tracks) {
      tech.audioTracks().addTrack(mediaTypes.AUDIO.tracks[id]);
    }
  };

  /**
   * Creates skeleton object used to store the loaders, tracks, and utility methods for each
   * media type
   *
   * @return {Object}
   *         Object to store the loaders, tracks, and utility methods for each media type
   * @function createMediaTypes
   */
  var createMediaTypes = function createMediaTypes() {
    var mediaTypes = {};

    ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {
      mediaTypes[type] = {
        groups: {},
        tracks: {},
        activePlaylistLoader: null,
        activeGroup: noop$1,
        activeTrack: noop$1,
        onGroupChanged: noop$1,
        onTrackChanged: noop$1
      };
    });

    return mediaTypes;
  };

  /**
   * @file master-playlist-controller.js
   */

  var ABORT_EARLY_BLACKLIST_SECONDS = 60 * 2;

  var Hls = void 0;

  // SegmentLoader stats that need to have each loader's
  // values summed to calculate the final value
  var loaderStats = ['mediaRequests', 'mediaRequestsAborted', 'mediaRequestsTimedout', 'mediaRequestsErrored', 'mediaTransferDuration', 'mediaBytesTransferred'];
  var sumLoaderStat = function sumLoaderStat(stat) {
    return this.audioSegmentLoader_[stat] + this.mainSegmentLoader_[stat];
  };

  /**
   * the master playlist controller controller all interactons
   * between playlists and segmentloaders. At this time this mainly
   * involves a master playlist and a series of audio playlists
   * if they are available
   *
   * @class MasterPlaylistController
   * @extends videojs.EventTarget
   */

  var MasterPlaylistController = function (_videojs$EventTarget5) {
    inherits(MasterPlaylistController, _videojs$EventTarget5);

    function MasterPlaylistController(options) {
      classCallCheck(this, MasterPlaylistController);

      var _this29 = possibleConstructorReturn(this, _videojs$EventTarget5.call(this));

      var url = options.url,
        withCredentials = options.withCredentials,
        tech = options.tech,
        bandwidth = options.bandwidth,
        externHls = options.externHls,
        useCueTags = options.useCueTags,
        blacklistDuration = options.blacklistDuration,
        enableLowInitialPlaylist = options.enableLowInitialPlaylist,
        sourceType = options.sourceType;


      if (!url) {
        throw new Error('A non-empty playlist URL is required');
      }

      Hls = externHls;

      _this29.withCredentials = withCredentials;
      _this29.tech_ = tech;
      _this29.hls_ = tech.hls;
      _this29.sourceType_ = sourceType;
      _this29.useCueTags_ = useCueTags;
      _this29.blacklistDuration = blacklistDuration;
      _this29.enableLowInitialPlaylist = enableLowInitialPlaylist;
      if (_this29.useCueTags_) {
        _this29.cueTagsTrack_ = _this29.tech_.addTextTrack('metadata', 'ad-cues');
        _this29.cueTagsTrack_.inBandMetadataTrackDispatchType = '';
      }

      _this29.requestOptions_ = {
        withCredentials: _this29.withCredentials,
        timeout: null
      };

      _this29.mediaTypes_ = createMediaTypes();

      _this29.mediaSource = new videojs$1.MediaSource();

      // load the media source into the player
      _this29.mediaSource.addEventListener('sourceopen', _this29.handleSourceOpen_.bind(_this29));

      _this29.seekable_ = videojs$1.createTimeRanges();
      _this29.hasPlayed_ = function () {
        return false;
      };

      _this29.syncController_ = new SyncController(options);
      _this29.segmentMetadataTrack_ = tech.addRemoteTextTrack({
        kind: 'metadata',
        label: 'segment-metadata'
      }, false).track;

      _this29.decrypter_ = new Decrypter$1();

      var segmentLoaderSettings = {
        hls: _this29.hls_,
        mediaSource: _this29.mediaSource,
        currentTime: _this29.tech_.currentTime.bind(_this29.tech_),
        seekable: function seekable() {
          return _this29.seekable();
        },
        seeking: function seeking() {
          return _this29.tech_.seeking();
        },
        duration: function duration() {
          return _this29.mediaSource.duration;
        },
        hasPlayed: function hasPlayed() {
          return _this29.hasPlayed_();
        },
        goalBufferLength: function goalBufferLength() {
          return _this29.goalBufferLength();
        },
        bandwidth: bandwidth,
        syncController: _this29.syncController_,
        decrypter: _this29.decrypter_,
        sourceType: _this29.sourceType_
      };

      _this29.masterPlaylistLoader_ = _this29.sourceType_ === 'dash' ? new DashPlaylistLoader(url, _this29.hls_, _this29.withCredentials) : new PlaylistLoader(url, _this29.hls_, _this29.withCredentials);
      _this29.setupMasterPlaylistLoaderListeners_();

      // setup segment loaders
      // combined audio/video or just video when alternate audio track is selected
      _this29.mainSegmentLoader_ = new SegmentLoader(videojs$1.mergeOptions(segmentLoaderSettings, {
        segmentMetadataTrack: _this29.segmentMetadataTrack_,
        loaderType: 'main'
      }), options);

      // alternate audio track
      _this29.audioSegmentLoader_ = new SegmentLoader(videojs$1.mergeOptions(segmentLoaderSettings, {
        loaderType: 'audio'
      }), options);

      _this29.subtitleSegmentLoader_ = new VTTSegmentLoader(videojs$1.mergeOptions(segmentLoaderSettings, {
        loaderType: 'vtt'
      }), options);

      _this29.setupSegmentLoaderListeners_();

      // Create SegmentLoader stat-getters
      loaderStats.forEach(function (stat) {
        _this29[stat + '_'] = sumLoaderStat.bind(_this29, stat);
      });

      _this29.logger_ = logger('MPC');

      _this29.masterPlaylistLoader_.load();
      return _this29;
    }

    /**
     * Register event handlers on the master playlist loader. A helper
     * function for construction time.
     *
     * @private
     */


    MasterPlaylistController.prototype.setupMasterPlaylistLoaderListeners_ = function setupMasterPlaylistLoaderListeners_() {
      var _this30 = this;

      this.masterPlaylistLoader_.on('loadedmetadata', function () {
        var media = _this30.masterPlaylistLoader_.media();
        var requestTimeout = _this30.masterPlaylistLoader_.targetDuration * 1.5 * 1000;

        // If we don't have any more available playlists, we don't want to
        // timeout the request.
        if (isLowestEnabledRendition(_this30.masterPlaylistLoader_.master, _this30.masterPlaylistLoader_.media())) {
          _this30.requestOptions_.timeout = 0;
        } else {
          _this30.requestOptions_.timeout = requestTimeout;
        }

        // if this isn't a live video and preload permits, start
        // downloading segments
        if (media.endList && _this30.tech_.preload() !== 'none') {
          _this30.mainSegmentLoader_.playlist(media, _this30.requestOptions_);
          _this30.mainSegmentLoader_.load();
        }

        setupMediaGroups({
          sourceType: _this30.sourceType_,
          segmentLoaders: {
            AUDIO: _this30.audioSegmentLoader_,
            SUBTITLES: _this30.subtitleSegmentLoader_,
            main: _this30.mainSegmentLoader_
          },
          tech: _this30.tech_,
          requestOptions: _this30.requestOptions_,
          masterPlaylistLoader: _this30.masterPlaylistLoader_,
          hls: _this30.hls_,
          master: _this30.master(),
          mediaTypes: _this30.mediaTypes_,
          blacklistCurrentPlaylist: _this30.blacklistCurrentPlaylist.bind(_this30)
        });

        _this30.triggerPresenceUsage_(_this30.master(), media);

        try {
          _this30.setupSourceBuffers_();
        } catch (e) {
          videojs$1.log.warn('Failed to create SourceBuffers', e);
          return _this30.mediaSource.endOfStream('decode');
        }
        _this30.setupFirstPlay();

        _this30.trigger('selectedinitialmedia');
      });

      this.masterPlaylistLoader_.on('loadedplaylist', function () {
        var updatedPlaylist = _this30.masterPlaylistLoader_.media();

        if (!updatedPlaylist) {
          // blacklist any variants that are not supported by the browser before selecting
          // an initial media as the playlist selectors do not consider browser support
          _this30.excludeUnsupportedVariants_();

          var selectedMedia = void 0;

          if (_this30.enableLowInitialPlaylist) {
            selectedMedia = _this30.selectInitialPlaylist();
          }

          if (!selectedMedia) {
            selectedMedia = _this30.selectPlaylist();
          }

          _this30.initialMedia_ = selectedMedia;
          _this30.masterPlaylistLoader_.media(_this30.initialMedia_);
          return;
        }

        if (_this30.useCueTags_) {
          _this30.updateAdCues_(updatedPlaylist);
        }

        // TODO: Create a new event on the PlaylistLoader that signals
        // that the segments have changed in some way and use that to
        // update the SegmentLoader instead of doing it twice here and
        // on `mediachange`
        _this30.mainSegmentLoader_.playlist(updatedPlaylist, _this30.requestOptions_);
        _this30.updateDuration();

        // If the player isn't paused, ensure that the segment loader is running,
        // as it is possible that it was temporarily stopped while waiting for
        // a playlist (e.g., in case the playlist errored and we re-requested it).
        if (!_this30.tech_.paused()) {
          _this30.mainSegmentLoader_.load();
        }

        if (!updatedPlaylist.endList) {
          var addSeekableRange = function addSeekableRange() {
            var seekable$$1 = _this30.seekable();

            if (seekable$$1.length !== 0) {
              _this30.mediaSource.addSeekableRange_(seekable$$1.start(0), seekable$$1.end(0));
            }
          };

          if (_this30.duration() !== Infinity) {
            var onDurationchange = function onDurationchange() {
              if (_this30.duration() === Infinity) {
                addSeekableRange();
              } else {
                _this30.tech_.one('durationchange', onDurationchange);
              }
            };

            _this30.tech_.one('durationchange', onDurationchange);
          } else {
            addSeekableRange();
          }
        }
      });

      this.masterPlaylistLoader_.on('error', function () {
        _this30.blacklistCurrentPlaylist(_this30.masterPlaylistLoader_.error);
      });

      this.masterPlaylistLoader_.on('mediachanging', function () {
        _this30.mainSegmentLoader_.abort();
        _this30.mainSegmentLoader_.pause();
      });

      this.masterPlaylistLoader_.on('mediachange', function () {
        var media = _this30.masterPlaylistLoader_.media();
        var requestTimeout = _this30.masterPlaylistLoader_.targetDuration * 1.5 * 1000;

        // If we don't have any more available playlists, we don't want to
        // timeout the request.
        if (isLowestEnabledRendition(_this30.masterPlaylistLoader_.master, _this30.masterPlaylistLoader_.media())) {
          _this30.requestOptions_.timeout = 0;
        } else {
          _this30.requestOptions_.timeout = requestTimeout;
        }

        // TODO: Create a new event on the PlaylistLoader that signals
        // that the segments have changed in some way and use that to
        // update the SegmentLoader instead of doing it twice here and
        // on `loadedplaylist`
        _this30.mainSegmentLoader_.playlist(media, _this30.requestOptions_);
        _this30.mainSegmentLoader_.load();

        _this30.tech_.trigger({
          type: 'mediachange',
          bubbles: true
        });
      });

      this.masterPlaylistLoader_.on('playlistunchanged', function () {
        var updatedPlaylist = _this30.masterPlaylistLoader_.media();
        var playlistOutdated = _this30.stuckAtPlaylistEnd_(updatedPlaylist);

        if (playlistOutdated) {
          // Playlist has stopped updating and we're stuck at its end. Try to
          // blacklist it and switch to another playlist in the hope that that
          // one is updating (and give the player a chance to re-adjust to the
          // safe live point).
          _this30.blacklistCurrentPlaylist({
            message: 'Playlist no longer updating.'
          });
          // useful for monitoring QoS
          _this30.tech_.trigger('playliststuck');
        }
      });

      this.masterPlaylistLoader_.on('renditiondisabled', function () {
        _this30.tech_.trigger({type: 'usage', name: 'hls-rendition-disabled'});
      });
      this.masterPlaylistLoader_.on('renditionenabled', function () {
        _this30.tech_.trigger({type: 'usage', name: 'hls-rendition-enabled'});
      });
    };

    /**
     * A helper function for triggerring presence usage events once per source
     *
     * @private
     */


    MasterPlaylistController.prototype.triggerPresenceUsage_ = function triggerPresenceUsage_(master, media) {
      var mediaGroups = master.mediaGroups || {};
      var defaultDemuxed = true;
      var audioGroupKeys = Object.keys(mediaGroups.AUDIO);

      for (var mediaGroup in mediaGroups.AUDIO) {
        for (var label in mediaGroups.AUDIO[mediaGroup]) {
          var properties = mediaGroups.AUDIO[mediaGroup][label];

          if (!properties.uri) {
            defaultDemuxed = false;
          }
        }
      }

      if (defaultDemuxed) {
        this.tech_.trigger({type: 'usage', name: 'hls-demuxed'});
      }

      if (Object.keys(mediaGroups.SUBTITLES).length) {
        this.tech_.trigger({type: 'usage', name: 'hls-webvtt'});
      }

      if (Hls.Playlist.isAes(media)) {
        this.tech_.trigger({type: 'usage', name: 'hls-aes'});
      }

      if (Hls.Playlist.isFmp4(media)) {
        this.tech_.trigger({type: 'usage', name: 'hls-fmp4'});
      }

      if (audioGroupKeys.length && Object.keys(mediaGroups.AUDIO[audioGroupKeys[0]]).length > 1) {
        this.tech_.trigger({type: 'usage', name: 'hls-alternate-audio'});
      }

      if (this.useCueTags_) {
        this.tech_.trigger({type: 'usage', name: 'hls-playlist-cue-tags'});
      }
    };
    /**
     * Register event handlers on the segment loaders. A helper function
     * for construction time.
     *
     * @private
     */


    MasterPlaylistController.prototype.setupSegmentLoaderListeners_ = function setupSegmentLoaderListeners_() {
      var _this31 = this;

      this.mainSegmentLoader_.on('bandwidthupdate', function () {
        var nextPlaylist = _this31.selectPlaylist();
        var currentPlaylist = _this31.masterPlaylistLoader_.media();
        var buffered = _this31.tech_.buffered();
        var forwardBuffer = buffered.length ? buffered.end(buffered.length - 1) - _this31.tech_.currentTime() : 0;

        var bufferLowWaterLine = _this31.bufferLowWaterLine();

        // If the playlist is live, then we want to not take low water line into account.
        // This is because in LIVE, the player plays 3 segments from the end of the
        // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble
        // in those segments, a viewer will never experience a rendition upswitch.
        if (!currentPlaylist.endList ||
          // For the same reason as LIVE, we ignore the low water line when the VOD
          // duration is below the max potential low water line
          _this31.duration() < Config.MAX_BUFFER_LOW_WATER_LINE ||
          // we want to switch down to lower resolutions quickly to continue playback, but
          nextPlaylist.attributes.BANDWIDTH < currentPlaylist.attributes.BANDWIDTH ||
          // ensure we have some buffer before we switch up to prevent us running out of
          // buffer while loading a higher rendition.
          forwardBuffer >= bufferLowWaterLine) {
          _this31.masterPlaylistLoader_.media(nextPlaylist);
        }

        _this31.tech_.trigger('bandwidthupdate');
      });
      this.mainSegmentLoader_.on('progress', function () {
        _this31.trigger('progress');
      });

      this.mainSegmentLoader_.on('error', function () {
        _this31.blacklistCurrentPlaylist(_this31.mainSegmentLoader_.error());
      });

      this.mainSegmentLoader_.on('syncinfoupdate', function () {
        _this31.onSyncInfoUpdate_();
      });

      this.mainSegmentLoader_.on('timestampoffset', function () {
        _this31.tech_.trigger({type: 'usage', name: 'hls-timestamp-offset'});
      });
      this.audioSegmentLoader_.on('syncinfoupdate', function () {
        _this31.onSyncInfoUpdate_();
      });

      this.mainSegmentLoader_.on('ended', function () {
        _this31.onEndOfStream();
      });

      this.mainSegmentLoader_.on('earlyabort', function () {
        _this31.blacklistCurrentPlaylist({
          message: 'Aborted early because there isn\'t enough bandwidth to complete the ' + 'request without rebuffering.'
        }, ABORT_EARLY_BLACKLIST_SECONDS);
      });

      this.mainSegmentLoader_.on('reseteverything', function () {
        // If playing an MTS stream, a videojs.MediaSource is listening for
        // hls-reset to reset caption parsing state in the transmuxer
        _this31.tech_.trigger('hls-reset');
      });

      this.mainSegmentLoader_.on('segmenttimemapping', function (event) {
        // If playing an MTS stream in html, a videojs.MediaSource is listening for
        // hls-segment-time-mapping update its internal mapping of stream to display time
        _this31.tech_.trigger({
          type: 'hls-segment-time-mapping',
          mapping: event.mapping
        });
      });

      this.audioSegmentLoader_.on('ended', function () {
        _this31.onEndOfStream();
      });
    };

    MasterPlaylistController.prototype.mediaSecondsLoaded_ = function mediaSecondsLoaded_() {
      return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded + this.mainSegmentLoader_.mediaSecondsLoaded);
    };

    /**
     * Call load on our SegmentLoaders
     */


    MasterPlaylistController.prototype.load = function load() {
      this.mainSegmentLoader_.load();
      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {
        this.audioSegmentLoader_.load();
      }
      if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {
        this.subtitleSegmentLoader_.load();
      }
    };

    /**
     * Re-tune playback quality level for the current player
     * conditions. This method may perform destructive actions, like
     * removing already buffered content, to readjust the currently
     * active playlist quickly.
     *
     * @private
     */


    MasterPlaylistController.prototype.fastQualityChange_ = function fastQualityChange_() {
      var media = this.selectPlaylist();

      if (media !== this.masterPlaylistLoader_.media()) {
        this.masterPlaylistLoader_.media(media);

        this.mainSegmentLoader_.resetLoader();
        // don't need to reset audio as it is reset when media changes
      }
    };

    /**
     * Begin playback.
     */


    MasterPlaylistController.prototype.play = function play() {
      if (this.setupFirstPlay()) {
        return;
      }

      if (this.tech_.ended()) {
        this.tech_.setCurrentTime(0);
      }

      if (this.hasPlayed_()) {
        this.load();
      }

      var seekable$$1 = this.tech_.seekable();

      // if the viewer has paused and we fell out of the live window,
      // seek forward to the live point
      if (this.tech_.duration() === Infinity) {
        if (this.tech_.currentTime() < seekable$$1.start(0)) {
          return this.tech_.setCurrentTime(seekable$$1.end(seekable$$1.length - 1));
        }
      }
    };

    /**
     * Seek to the latest media position if this is a live video and the
     * player and video are loaded and initialized.
     */


    MasterPlaylistController.prototype.setupFirstPlay = function setupFirstPlay() {
      var _this32 = this;

      var media = this.masterPlaylistLoader_.media();

      // Check that everything is ready to begin buffering for the first call to playOld
      //  If 1) there is no active media
      //     2) the player is paused
      //     3) the first playOld has already been setup
      // then exit early
      if (!media || this.tech_.paused() || this.hasPlayed_()) {
        return false;
      }

      // when the video is a live stream
      if (!media.endList) {
        var seekable$$1 = this.seekable();

        if (!seekable$$1.length) {
          // without a seekable range, the player cannot seek to begin buffering at the live
          // point
          return false;
        }

        if (videojs$1.browser.IE_VERSION && this.tech_.readyState() === 0) {
          // IE11 throws an InvalidStateError if you try to set currentTime while the
          // readyState is 0, so it must be delayed until the tech fires loadedmetadata.
          this.tech_.one('loadedmetadata', function () {
            _this32.trigger('firstplay');
            _this32.tech_.setCurrentTime(seekable$$1.end(0));
            _this32.hasPlayed_ = function () {
              return true;
            };
          });

          return false;
        }

        // trigger firstplay to inform the source handler to ignore the next seek event
        this.trigger('firstplay');
        // seek to the live point
        this.tech_.setCurrentTime(seekable$$1.end(0));
      }

      this.hasPlayed_ = function () {
        return true;
      };
      // we can begin loading now that everything is ready
      this.load();
      return true;
    };

    /**
     * handle the sourceopen event on the MediaSource
     *
     * @private
     */


    MasterPlaylistController.prototype.handleSourceOpen_ = function handleSourceOpen_() {
      // Only attempt to create the source buffer if none already exist.
      // handleSourceOpen is also called when we are "re-opening" a source buffer
      // after `endOfStream` has been called (in response to a seek for instance)
      try {
        this.setupSourceBuffers_();
      } catch (e) {
        videojs$1.log.warn('Failed to create Source Buffers', e);
        return this.mediaSource.endOfStream('decode');
      }

      // if autoplay is enabled, begin playback. This is duplicative of
      // code in video.js but is required because playOld() must be invoked
      // *after* the media source has opened.
      if (this.tech_.autoplay()) {
        var playPromise = this.tech_.play();

        // Catch/silence error when a pause interrupts a playOld request
        // on browsers which return a promise
        if (typeof playPromise !== 'undefined' && typeof playPromise.then === 'function') {
          playPromise.then(null, function (e) {
          });
        }
      }

      this.trigger('sourceopen');
    };

    /**
     * Calls endOfStream on the media source when all active stream types have called
     * endOfStream
     *
     * @param {string} streamType
     *        Stream type of the segment loader that called endOfStream
     * @private
     */


    MasterPlaylistController.prototype.onEndOfStream = function onEndOfStream() {
      var isEndOfStream = this.mainSegmentLoader_.ended_;

      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {
        // if the audio playlist loader exists, then alternate audio is active
        if (!this.mainSegmentLoader_.startingMedia_ || this.mainSegmentLoader_.startingMedia_.containsVideo) {
          // if we do not know if the main segment loader contains video yet or if we
          // definitively know the main segment loader contains video, then we need to wait
          // for both main and audio segment loaders to call endOfStream
          isEndOfStream = isEndOfStream && this.audioSegmentLoader_.ended_;
        } else {
          // otherwise just rely on the audio loader
          isEndOfStream = this.audioSegmentLoader_.ended_;
        }
      }

      if (isEndOfStream) {
        this.mediaSource.endOfStream();
      }
    };

    /**
     * Check if a playlist has stopped being updated
     * @param {Object} playlist the media playlist object
     * @return {boolean} whether the playlist has stopped being updated or not
     */


    MasterPlaylistController.prototype.stuckAtPlaylistEnd_ = function stuckAtPlaylistEnd_(playlist) {
      var seekable$$1 = this.seekable();

      if (!seekable$$1.length) {
        // playlist doesn't have enough information to determine whether we are stuck
        return false;
      }

      var expired = this.syncController_.getExpiredTime(playlist, this.mediaSource.duration);

      if (expired === null) {
        return false;
      }

      // does not use the safe live end to calculate playlist end, since we
      // don't want to say we are stuck while there is still content
      var absolutePlaylistEnd = Hls.Playlist.playlistEnd(playlist, expired);
      var currentTime = this.tech_.currentTime();
      var buffered = this.tech_.buffered();

      if (!buffered.length) {
        // return true if the playhead reached the absolute end of the playlist
        return absolutePlaylistEnd - currentTime <= SAFE_TIME_DELTA;
      }
      var bufferedEnd = buffered.end(buffered.length - 1);

      // return true if there is too little buffer left and buffer has reached absolute
      // end of playlist
      return bufferedEnd - currentTime <= SAFE_TIME_DELTA && absolutePlaylistEnd - bufferedEnd <= SAFE_TIME_DELTA;
    };

    /**
     * Blacklists a playlist when an error occurs for a set amount of time
     * making it unavailable for selection by the rendition selection algorithm
     * and then forces a new playlist (rendition) selection.
     *
     * @param {Object=} error an optional error that may include the playlist
     * to blacklist
     * @param {Number=} blacklistDuration an optional number of seconds to blacklist the
     * playlist
     */


    MasterPlaylistController.prototype.blacklistCurrentPlaylist = function blacklistCurrentPlaylist() {
      var error = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      var blacklistDuration = arguments[1];

      var currentPlaylist = void 0;
      var nextPlaylist = void 0;

      // If the `error` was generated by the playlist loader, it will contain
      // the playlist we were trying to load (but failed) and that should be
      // blacklisted instead of the currently selected playlist which is likely
      // out-of-date in this scenario
      currentPlaylist = error.playlist || this.masterPlaylistLoader_.media();

      blacklistDuration = blacklistDuration || error.blacklistDuration || this.blacklistDuration;

      // If there is no current playlist, then an error occurred while we were
      // trying to load the master OR while we were disposing of the tech
      if (!currentPlaylist) {
        this.error = error;

        try {
          return this.mediaSource.endOfStream('network');
        } catch (e) {
          return this.trigger('error');
        }
      }

      var isFinalRendition = this.masterPlaylistLoader_.master.playlists.filter(isEnabled).length === 1;

      if (isFinalRendition) {
        // Never blacklisting this playlist because it's final rendition
        videojs$1.log.warn('Problem encountered with the current ' + 'HLS playlist. Trying again since it is the final playlist.');

        this.tech_.trigger('retryplaylist');
        return this.masterPlaylistLoader_.load(isFinalRendition);
      }
      // Blacklist this playlist
      currentPlaylist.excludeUntil = Date.now() + blacklistDuration * 1000;
      this.tech_.trigger('blacklistplaylist');
      this.tech_.trigger({type: 'usage', name: 'hls-rendition-blacklisted'});

      // Select a new playlist
      nextPlaylist = this.selectPlaylist();
      videojs$1.log.warn('Problem encountered with the current HLS playlist.' + (error.message ? ' ' + error.message : '') + ' Switching to another playlist.');

      return this.masterPlaylistLoader_.media(nextPlaylist);
    };

    /**
     * Pause all segment loaders
     */


    MasterPlaylistController.prototype.pauseLoading = function pauseLoading() {
      this.mainSegmentLoader_.pause();
      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {
        this.audioSegmentLoader_.pause();
      }
      if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {
        this.subtitleSegmentLoader_.pause();
      }
    };

    /**
     * set the current time on all segment loaders
     *
     * @param {TimeRange} currentTime the current time to set
     * @return {TimeRange} the current time
     */


    MasterPlaylistController.prototype.setCurrentTime = function setCurrentTime(currentTime) {
      var buffered = findRange(this.tech_.buffered(), currentTime);

      if (!(this.masterPlaylistLoader_ && this.masterPlaylistLoader_.media())) {
        // return immediately if the metadata is not ready yet
        return 0;
      }

      // it's clearly an edge-case but don't thrown an error if asked to
      // seek within an empty playlist
      if (!this.masterPlaylistLoader_.media().segments) {
        return 0;
      }

      // In flash playback, the segment loaders should be reset on every seek, even
      // in buffer seeks. If the seek location is already buffered, continue buffering as
      // usual
      // TODO: redo this comment
      if (buffered && buffered.length) {
        return currentTime;
      }

      // cancel outstanding requests so we begin buffering at the new
      // location
      this.mainSegmentLoader_.resetEverything();
      this.mainSegmentLoader_.abort();
      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {
        this.audioSegmentLoader_.resetEverything();
        this.audioSegmentLoader_.abort();
      }
      if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {
        this.subtitleSegmentLoader_.resetEverything();
        this.subtitleSegmentLoader_.abort();
      }

      // start segment loader loading in case they are paused
      this.load();
    };

    /**
     * get the current duration
     *
     * @return {TimeRange} the duration
     */


    MasterPlaylistController.prototype.duration = function duration() {
      if (!this.masterPlaylistLoader_) {
        return 0;
      }

      if (this.mediaSource) {
        return this.mediaSource.duration;
      }

      return Hls.Playlist.duration(this.masterPlaylistLoader_.media());
    };

    /**
     * check the seekable range
     *
     * @return {TimeRange} the seekable range
     */


    MasterPlaylistController.prototype.seekable = function seekable() {
      return this.seekable_;
    };

    MasterPlaylistController.prototype.onSyncInfoUpdate_ = function onSyncInfoUpdate_() {
      var mainSeekable = void 0;
      var audioSeekable = void 0;

      if (!this.masterPlaylistLoader_) {
        return;
      }

      var media = this.masterPlaylistLoader_.media();

      if (!media) {
        return;
      }

      var expired = this.syncController_.getExpiredTime(media, this.mediaSource.duration);

      if (expired === null) {
        // not enough information to update seekable
        return;
      }

      mainSeekable = Hls.Playlist.seekable(media, expired);

      if (mainSeekable.length === 0) {
        return;
      }

      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {
        media = this.mediaTypes_.AUDIO.activePlaylistLoader.media();
        expired = this.syncController_.getExpiredTime(media, this.mediaSource.duration);

        if (expired === null) {
          return;
        }

        audioSeekable = Hls.Playlist.seekable(media, expired);

        if (audioSeekable.length === 0) {
          return;
        }
      }

      if (!audioSeekable) {
        // seekable has been calculated based on buffering video data so it
        // can be returned directly
        this.seekable_ = mainSeekable;
      } else if (audioSeekable.start(0) > mainSeekable.end(0) || mainSeekable.start(0) > audioSeekable.end(0)) {
        // seekables are pretty far off, rely on main
        this.seekable_ = mainSeekable;
      } else {
        this.seekable_ = videojs$1.createTimeRanges([[audioSeekable.start(0) > mainSeekable.start(0) ? audioSeekable.start(0) : mainSeekable.start(0), audioSeekable.end(0) < mainSeekable.end(0) ? audioSeekable.end(0) : mainSeekable.end(0)]]);
      }

      this.logger_('seekable updated [' + printableRange(this.seekable_) + ']');

      this.tech_.trigger('seekablechanged');
    };

    /**
     * Update the player duration
     */


    MasterPlaylistController.prototype.updateDuration = function updateDuration() {
      var _this33 = this;

      var oldDuration = this.mediaSource.duration;
      var newDuration = Hls.Playlist.duration(this.masterPlaylistLoader_.media());
      var buffered = this.tech_.buffered();
      var setDuration = function setDuration() {
        _this33.mediaSource.duration = newDuration;
        _this33.tech_.trigger('durationchange');

        _this33.mediaSource.removeEventListener('sourceopen', setDuration);
      };

      if (buffered.length > 0) {
        newDuration = Math.max(newDuration, buffered.end(buffered.length - 1));
      }

      // if the duration has changed, invalidate the cached value
      if (oldDuration !== newDuration) {
        // update the duration
        if (this.mediaSource.readyState !== 'open') {
          this.mediaSource.addEventListener('sourceopen', setDuration);
        } else {
          setDuration();
        }
      }
    };

    /**
     * dispose of the MasterPlaylistController and everything
     * that it controls
     */


    MasterPlaylistController.prototype.dispose = function dispose() {
      var _this34 = this;

      this.decrypter_.terminate();
      this.masterPlaylistLoader_.dispose();
      this.mainSegmentLoader_.dispose();

      ['AUDIO', 'SUBTITLES'].forEach(function (type) {
        var groups = _this34.mediaTypes_[type].groups;

        for (var id in groups) {
          groups[id].forEach(function (group) {
            if (group.playlistLoader) {
              group.playlistLoader.dispose();
            }
          });
        }
      });

      this.audioSegmentLoader_.dispose();
      this.subtitleSegmentLoader_.dispose();
    };

    /**
     * return the master playlist object if we have one
     *
     * @return {Object} the master playlist object that we parsed
     */


    MasterPlaylistController.prototype.master = function master() {
      return this.masterPlaylistLoader_.master;
    };

    /**
     * return the currently selected playlist
     *
     * @return {Object} the currently selected playlist object that we parsed
     */


    MasterPlaylistController.prototype.media = function media() {
      // playlist loader will not return media if it has not been fully loaded
      return this.masterPlaylistLoader_.media() || this.initialMedia_;
    };

    /**
     * setup our internal source buffers on our segment Loaders
     *
     * @private
     */


    MasterPlaylistController.prototype.setupSourceBuffers_ = function setupSourceBuffers_() {
      var media = this.masterPlaylistLoader_.media();
      var mimeTypes = void 0;

      // wait until a media playlist is available and the Media Source is
      // attached
      if (!media || this.mediaSource.readyState !== 'open') {
        return;
      }

      mimeTypes = mimeTypesForPlaylist(this.masterPlaylistLoader_.master, media);
      if (mimeTypes.length < 1) {
        this.error = 'No compatible SourceBuffer configuration for the variant stream:' + media.resolvedUri;
        return this.mediaSource.endOfStream('decode');
      }

      this.configureLoaderMimeTypes_(mimeTypes);
      // exclude any incompatible variant streams from future playlist
      // selection
      this.excludeIncompatibleVariants_(media);
    };

    MasterPlaylistController.prototype.configureLoaderMimeTypes_ = function configureLoaderMimeTypes_(mimeTypes) {
      // If the content is demuxed, we can't start appending segments to a source buffer
      // until both source buffers are set up, or else the browser may not let us add the
      // second source buffer (it will assume we are playing either audio only or video
      // only).
      var sourceBufferEmitter =
        // If there is more than one mime type
        mimeTypes.length > 1 &&
        // and the first mime type does not have muxed video and audio
        mimeTypes[0].indexOf(',') === -1 &&
        // and the two mime types are different (they can be the same in the case of audio
        // only with alternate audio)
        mimeTypes[0] !== mimeTypes[1] ?
          // then we want to wait on the second source buffer
          new videojs$1.EventTarget() :
          // otherwise there is no need to wait as the content is either audio only,
          // video only, or muxed content.
          null;

      this.mainSegmentLoader_.mimeType(mimeTypes[0], sourceBufferEmitter);
      if (mimeTypes[1]) {
        this.audioSegmentLoader_.mimeType(mimeTypes[1], sourceBufferEmitter);
      }
    };

    /**
     * Blacklists playlists with codecs that are unsupported by the browser.
     */


    MasterPlaylistController.prototype.excludeUnsupportedVariants_ = function excludeUnsupportedVariants_() {
      this.master().playlists.forEach(function (variant) {
        if (variant.attributes.CODECS && window_1.MediaSource && window_1.MediaSource.isTypeSupported && !window_1.MediaSource.isTypeSupported('video/mp4; codecs="' + mapLegacyAvcCodecs(variant.attributes.CODECS) + '"')) {
          variant.excludeUntil = Infinity;
        }
      });
    };

    /**
     * Blacklist playlists that are known to be codec or
     * stream-incompatible with the SourceBuffer configuration. For
     * instance, Media Source Extensions would cause the video element to
     * stall waiting for video data if you switched from a variant with
     * video and audio to an audio-only one.
     *
     * @param {Object} media a media playlist compatible with the current
     * set of SourceBuffers. Variants in the current master playlist that
     * do not appear to have compatible codec or stream configurations
     * will be excluded from the default playlist selection algorithm
     * indefinitely.
     * @private
     */


    MasterPlaylistController.prototype.excludeIncompatibleVariants_ = function excludeIncompatibleVariants_(media) {
      var codecCount = 2;
      var videoCodec = null;
      var codecs = void 0;

      if (media.attributes.CODECS) {
        codecs = parseCodecs(media.attributes.CODECS);
        videoCodec = codecs.videoCodec;
        codecCount = codecs.codecCount;
      }

      this.master().playlists.forEach(function (variant) {
        var variantCodecs = {
          codecCount: 2,
          videoCodec: null
        };

        if (variant.attributes.CODECS) {
          variantCodecs = parseCodecs(variant.attributes.CODECS);
        }

        // if the streams differ in the presence or absence of audio or
        // video, they are incompatible
        if (variantCodecs.codecCount !== codecCount) {
          variant.excludeUntil = Infinity;
        }

        // if h.264 is specified on the current playlist, some flavor of
        // it must be specified on all compatible variants
        if (variantCodecs.videoCodec !== videoCodec) {
          variant.excludeUntil = Infinity;
        }
      });
    };

    MasterPlaylistController.prototype.updateAdCues_ = function updateAdCues_(media) {
      var offset = 0;
      var seekable$$1 = this.seekable();

      if (seekable$$1.length) {
        offset = seekable$$1.start(0);
      }

      updateAdCues(media, this.cueTagsTrack_, offset);
    };

    /**
     * Calculates the desired forward buffer length based on current time
     *
     * @return {Number} Desired forward buffer length in seconds
     */


    MasterPlaylistController.prototype.goalBufferLength = function goalBufferLength() {
      var currentTime = this.tech_.currentTime();
      var initial = Config.GOAL_BUFFER_LENGTH;
      var rate = Config.GOAL_BUFFER_LENGTH_RATE;
      var max = Math.max(initial, Config.MAX_GOAL_BUFFER_LENGTH);

      return Math.min(initial + currentTime * rate, max);
    };

    /**
     * Calculates the desired buffer low water line based on current time
     *
     * @return {Number} Desired buffer low water line in seconds
     */


    MasterPlaylistController.prototype.bufferLowWaterLine = function bufferLowWaterLine() {
      var currentTime = this.tech_.currentTime();
      var initial = Config.BUFFER_LOW_WATER_LINE;
      var rate = Config.BUFFER_LOW_WATER_LINE_RATE;
      var max = Math.max(initial, Config.MAX_BUFFER_LOW_WATER_LINE);

      return Math.min(initial + currentTime * rate, max);
    };

    return MasterPlaylistController;
  }(videojs$1.EventTarget);

  /**
   * Returns a function that acts as the Enable/disable playlist function.
   *
   * @param {PlaylistLoader} loader - The master playlist loader
   * @param {String} playlistUri - uri of the playlist
   * @param {Function} changePlaylistFn - A function to be called after a
   * playlist's enabled-state has been changed. Will NOT be called if a
   * playlist's enabled-state is unchanged
   * @param {Boolean=} enable - Value to set the playlist enabled-state to
   * or if undefined returns the current enabled-state for the playlist
   * @return {Function} Function for setting/getting enabled
   */


  var enableFunction = function enableFunction(loader, playlistUri, changePlaylistFn) {
    return function (enable) {
      var playlist = loader.master.playlists[playlistUri];
      var incompatible = isIncompatible(playlist);
      var currentlyEnabled = isEnabled(playlist);

      if (typeof enable === 'undefined') {
        return currentlyEnabled;
      }

      if (enable) {
        delete playlist.disabled;
      } else {
        playlist.disabled = true;
      }

      if (enable !== currentlyEnabled && !incompatible) {
        // Ensure the outside world knows about our changes
        changePlaylistFn();
        if (enable) {
          loader.trigger('renditionenabled');
        } else {
          loader.trigger('renditiondisabled');
        }
      }
      return enable;
    };
  };

  /**
   * The representation object encapsulates the publicly visible information
   * in a media playlist along with a setter/getter-type function (enabled)
   * for changing the enabled-state of a particular playlist entry
   *
   * @class Representation
   */

  var Representation = function Representation(hlsHandler, playlist, id) {
    classCallCheck(this, Representation);

    // Get a reference to a bound version of fastQualityChange_
    var fastChangeFunction = hlsHandler.masterPlaylistController_.fastQualityChange_.bind(hlsHandler.masterPlaylistController_);

    // some playlist attributes are optional
    if (playlist.attributes.RESOLUTION) {
      var resolution = playlist.attributes.RESOLUTION;

      this.width = resolution.width;
      this.height = resolution.height;
    }

    this.bandwidth = playlist.attributes.BANDWIDTH;

    // The id is simply the ordinality of the media playlist
    // within the master playlist
    this.id = id;

    // Partially-apply the enableFunction to create a playlist-
    // specific variant
    this.enabled = enableFunction(hlsHandler.playlists, playlist.uri, fastChangeFunction);
  };

  /**
   * A mixin function that adds the `representations` api to an instance
   * of the HlsHandler class
   * @param {HlsHandler} hlsHandler - An instance of HlsHandler to add the
   * representation API into
   */


  var renditionSelectionMixin = function renditionSelectionMixin(hlsHandler) {
    var playlists = hlsHandler.playlists;

    // Add a single API-specific function to the HlsHandler instance
    hlsHandler.representations = function () {
      return playlists.master.playlists.filter(function (media) {
        return !isIncompatible(media);
      }).map(function (e, i) {
        return new Representation(hlsHandler, e, e.uri);
      });
    };
  };

  /**
   * @file playback-watcher.js
   *
   * Playback starts, and now my watch begins. It shall not end until my death. I shall
   * take no wait, hold no uncleared timeouts, father no bad seeks. I shall wear no crowns
   * and win no glory. I shall live and die at my post. I am the corrector of the underflow.
   * I am the watcher of gaps. I am the shield that guards the realms of seekable. I pledge
   * my life and honor to the Playback Watch, for this Player and all the Players to come.
   */

    // Set of events that reset the playback-watcher time check logic and clear the timeout
  var timerCancelEvents = ['seeking', 'seeked', 'pause', 'playing', 'error'];

  /**
   * @class PlaybackWatcher
   */

  var PlaybackWatcher = function () {
    /**
     * Represents an PlaybackWatcher object.
     * @constructor
     * @param {object} options an object that includes the tech and settings
     */
    function PlaybackWatcher(options) {
      var _this35 = this;

      classCallCheck(this, PlaybackWatcher);

      this.tech_ = options.tech;
      this.seekable = options.seekable;

      this.consecutiveUpdates = 0;
      this.lastRecordedTime = null;
      this.timer_ = null;
      this.checkCurrentTimeTimeout_ = null;
      this.logger_ = logger('PlaybackWatcher');

      this.logger_('initialize');

      var canPlayHandler = function canPlayHandler() {
        return _this35.monitorCurrentTime_();
      };
      var waitingHandler = function waitingHandler() {
        return _this35.techWaiting_();
      };
      var cancelTimerHandler = function cancelTimerHandler() {
        return _this35.cancelTimer_();
      };
      var fixesBadSeeksHandler = function fixesBadSeeksHandler() {
        return _this35.fixesBadSeeks_();
      };

      this.tech_.on('seekablechanged', fixesBadSeeksHandler);
      this.tech_.on('waiting', waitingHandler);
      this.tech_.on(timerCancelEvents, cancelTimerHandler);
      this.tech_.on('canplay', canPlayHandler);

      // Define the dispose function to clean up our events
      this.dispose = function () {
        _this35.logger_('dispose');
        _this35.tech_.off('seekablechanged', fixesBadSeeksHandler);
        _this35.tech_.off('waiting', waitingHandler);
        _this35.tech_.off(timerCancelEvents, cancelTimerHandler);
        _this35.tech_.off('canplay', canPlayHandler);
        if (_this35.checkCurrentTimeTimeout_) {
          window_1.clearTimeout(_this35.checkCurrentTimeTimeout_);
        }
        _this35.cancelTimer_();
      };
    }

    /**
     * Periodically check current time to see if playback stopped
     *
     * @private
     */


    PlaybackWatcher.prototype.monitorCurrentTime_ = function monitorCurrentTime_() {
      this.checkCurrentTime_();

      if (this.checkCurrentTimeTimeout_) {
        window_1.clearTimeout(this.checkCurrentTimeTimeout_);
      }

      // 42 = 24 fps // 250 is what Webkit uses // FF uses 15
      this.checkCurrentTimeTimeout_ = window_1.setTimeout(this.monitorCurrentTime_.bind(this), 250);
    };

    /**
     * The purpose of this function is to emulate the "waiting" event on
     * browsers that do not emit it when they are waiting for more
     * data to continue playback
     *
     * @private
     */


    PlaybackWatcher.prototype.checkCurrentTime_ = function checkCurrentTime_() {
      if (this.tech_.seeking() && this.fixesBadSeeks_()) {
        this.consecutiveUpdates = 0;
        this.lastRecordedTime = this.tech_.currentTime();
        return;
      }

      if (this.tech_.paused() || this.tech_.seeking()) {
        return;
      }

      var currentTime = this.tech_.currentTime();
      var buffered = this.tech_.buffered();

      if (this.lastRecordedTime === currentTime && (!buffered.length || currentTime + SAFE_TIME_DELTA >= buffered.end(buffered.length - 1))) {
        // If current time is at the end of the final buffered region, then any playback
        // stall is most likely caused by buffering in a low bandwidth environment. The tech
        // should fire a `waiting` event in this scenario, but due to browser and tech
        // inconsistencies. Calling `techWaiting_` here allows us to simulate
        // responding to a native `waiting` event when the tech fails to emit one.
        return this.techWaiting_();
      }

      if (this.consecutiveUpdates >= 5 && currentTime === this.lastRecordedTime) {
        this.consecutiveUpdates++;
        this.waiting_();
      } else if (currentTime === this.lastRecordedTime) {
        this.consecutiveUpdates++;
      } else {
        this.consecutiveUpdates = 0;
        this.lastRecordedTime = currentTime;
      }
    };

    /**
     * Cancels any pending timers and resets the 'timeupdate' mechanism
     * designed to detect that we are stalled
     *
     * @private
     */


    PlaybackWatcher.prototype.cancelTimer_ = function cancelTimer_() {
      this.consecutiveUpdates = 0;

      if (this.timer_) {
        this.logger_('cancelTimer_');
        clearTimeout(this.timer_);
      }

      this.timer_ = null;
    };

    /**
     * Fixes situations where there's a bad seek
     *
     * @return {Boolean} whether an action was taken to fix the seek
     * @private
     */


    PlaybackWatcher.prototype.fixesBadSeeks_ = function fixesBadSeeks_() {
      var seeking = this.tech_.seeking();
      var seekable = this.seekable();
      var currentTime = this.tech_.currentTime();
      var seekTo = void 0;

      if (seeking && this.afterSeekableWindow_(seekable, currentTime)) {
        var seekableEnd = seekable.end(seekable.length - 1);

        // sync to live point (if VOD, our seekable was updated and we're simply adjusting)
        seekTo = seekableEnd;
      }

      if (seeking && this.beforeSeekableWindow_(seekable, currentTime)) {
        var seekableStart = seekable.start(0);

        // sync to the beginning of the live window
        // provide a buffer of .1 seconds to handle rounding/imprecise numbers
        seekTo = seekableStart + SAFE_TIME_DELTA;
      }

      if (typeof seekTo !== 'undefined') {
        this.logger_('Trying to seek outside of seekable at time ' + currentTime + ' with ' + ('seekable range ' + printableRange(seekable) + '. Seeking to ') + (seekTo + '.'));

        this.tech_.setCurrentTime(seekTo);
        return true;
      }

      return false;
    };

    /**
     * Handler for situations when we determine the player is waiting.
     *
     * @private
     */


    PlaybackWatcher.prototype.waiting_ = function waiting_() {
      if (this.techWaiting_()) {
        return;
      }

      // All tech waiting checks failed. Use last resort correction
      var currentTime = this.tech_.currentTime();
      var buffered = this.tech_.buffered();
      var currentRange = findRange(buffered, currentTime);

      // Sometimes the player can stall for unknown reasons within a contiguous buffered
      // region with no indication that anything is amiss (seen in Firefox). Seeking to
      // currentTime is usually enough to kickstart the player. This checks that the player
      // is currently within a buffered region before attempting a corrective seek.
      // Chrome does not appear to continue `timeupdate` events after a `waiting` event
      // until there is ~ 3 seconds of forward buffer available. PlaybackWatcher should also
      // make sure there is ~3 seconds of forward buffer before taking any corrective action
      // to avoid triggering an `unknownwaiting` event when the network is slow.
      if (currentRange.length && currentTime + 3 <= currentRange.end(0)) {
        this.cancelTimer_();
        this.tech_.setCurrentTime(currentTime);

        this.logger_('Stopped at ' + currentTime + ' while inside a buffered region ' + ('[' + currentRange.start(0) + ' -> ' + currentRange.end(0) + ']. Attempting to resume ') + 'playback by seeking to the current time.');

        // unknown waiting corrections may be useful for monitoring QoS
        this.tech_.trigger({type: 'usage', name: 'hls-unknown-waiting'});
        return;
      }
    };

    /**
     * Handler for situations when the tech fires a `waiting` event
     *
     * @return {Boolean}
     *         True if an action (or none) was needed to correct the waiting. False if no
     *         checks passed
     * @private
     */


    PlaybackWatcher.prototype.techWaiting_ = function techWaiting_() {
      var seekable = this.seekable();
      var currentTime = this.tech_.currentTime();

      if (this.tech_.seeking() && this.fixesBadSeeks_()) {
        // Tech is seeking or bad seek fixed, no action needed
        return true;
      }

      if (this.tech_.seeking() || this.timer_ !== null) {
        // Tech is seeking or already waiting on another action, no action needed
        return true;
      }

      if (this.beforeSeekableWindow_(seekable, currentTime)) {
        var livePoint = seekable.end(seekable.length - 1);

        this.logger_('Fell out of live window at time ' + currentTime + '. Seeking to ' + ('live point (seekable end) ' + livePoint));
        this.cancelTimer_();
        this.tech_.setCurrentTime(livePoint);

        // live window resyncs may be useful for monitoring QoS
        this.tech_.trigger({type: 'usage', name: 'hls-live-resync'});
        return true;
      }

      var buffered = this.tech_.buffered();
      var nextRange = findNextRange(buffered, currentTime);

      if (this.videoUnderflow_(nextRange, buffered, currentTime)) {
        // Even though the video underflowed and was stuck in a gap, the audio overplayed
        // the gap, leading currentTime into a buffered range. Seeking to currentTime
        // allows the video to catch up to the audio position without losing any audio
        // (only suffering ~3 seconds of frozen video and a pause in audio playback).
        this.cancelTimer_();
        this.tech_.setCurrentTime(currentTime);

        // video underflow may be useful for monitoring QoS
        this.tech_.trigger({type: 'usage', name: 'hls-video-underflow'});
        return true;
      }

      // check for gap
      if (nextRange.length > 0) {
        var difference = nextRange.start(0) - currentTime;

        this.logger_('Stopped at ' + currentTime + ', setting timer for ' + difference + ', seeking ' + ('to ' + nextRange.start(0)));

        this.timer_ = setTimeout(this.skipTheGap_.bind(this), difference * 1000, currentTime);
        return true;
      }

      // All checks failed. Returning false to indicate failure to correct waiting
      return false;
    };

    PlaybackWatcher.prototype.afterSeekableWindow_ = function afterSeekableWindow_(seekable, currentTime) {
      if (!seekable.length) {
        // we can't make a solid case if there's no seekable, default to false
        return false;
      }

      if (currentTime > seekable.end(seekable.length - 1) + SAFE_TIME_DELTA) {
        return true;
      }

      return false;
    };

    PlaybackWatcher.prototype.beforeSeekableWindow_ = function beforeSeekableWindow_(seekable, currentTime) {
      if (seekable.length &&
        // can't fall before 0 and 0 seekable start identifies VOD stream
        seekable.start(0) > 0 && currentTime < seekable.start(0) - SAFE_TIME_DELTA) {
        return true;
      }

      return false;
    };

    PlaybackWatcher.prototype.videoUnderflow_ = function videoUnderflow_(nextRange, buffered, currentTime) {
      if (nextRange.length === 0) {
        // Even if there is no available next range, there is still a possibility we are
        // stuck in a gap due to video underflow.
        var gap = this.gapFromVideoUnderflow_(buffered, currentTime);

        if (gap) {
          this.logger_('Encountered a gap in video from ' + gap.start + ' to ' + gap.end + '. ' + ('Seeking to current time ' + currentTime));

          return true;
        }
      }

      return false;
    };

    /**
     * Timer callback. If playback still has not proceeded, then we seek
     * to the start of the next buffered region.
     *
     * @private
     */


    PlaybackWatcher.prototype.skipTheGap_ = function skipTheGap_(scheduledCurrentTime) {
      var buffered = this.tech_.buffered();
      var currentTime = this.tech_.currentTime();
      var nextRange = findNextRange(buffered, currentTime);

      this.cancelTimer_();

      if (nextRange.length === 0 || currentTime !== scheduledCurrentTime) {
        return;
      }

      this.logger_('skipTheGap_:', 'currentTime:', currentTime, 'scheduled currentTime:', scheduledCurrentTime, 'nextRange start:', nextRange.start(0));

      // only seek if we still have not played
      this.tech_.setCurrentTime(nextRange.start(0) + TIME_FUDGE_FACTOR);

      this.tech_.trigger({type: 'usage', name: 'hls-gap-skip'});
    };

    PlaybackWatcher.prototype.gapFromVideoUnderflow_ = function gapFromVideoUnderflow_(buffered, currentTime) {
      // At least in Chrome, if there is a gap in the video buffer, the audio will continue
      // playing for ~3 seconds after the video gap starts. This is done to account for
      // video buffer underflow/underrun (note that this is not done when there is audio
      // buffer underflow/underrun -- in that case the video will stop as soon as it
      // encounters the gap, as audio stalls are more noticeable/jarring to a user than
      // video stalls). The player's time will reflect the playthrough of audio, so the
      // time will appear as if we are in a buffered region, even if we are stuck in a
      // "gap."
      //
      // Example:
      // video buffer:   0 => 10.1, 10.2 => 20
      // audio buffer:   0 => 20
      // overall buffer: 0 => 10.1, 10.2 => 20
      // current time: 13
      //
      // Chrome's video froze at 10 seconds, where the video buffer encountered the gap,
      // however, the audio continued playing until it reached ~3 seconds past the gap
      // (13 seconds), at which point it stops as well. Since current time is past the
      // gap, findNextRange will return no ranges.
      //
      // To check for this issue, we see if there is a gap that starts somewhere within
      // a 3 second range (3 seconds +/- 1 second) back from our current time.
      var gaps = findGaps(buffered);

      for (var i = 0; i < gaps.length; i++) {
        var start = gaps.start(i);
        var end = gaps.end(i);

        // gap is starts no more than 4 seconds back
        if (currentTime - start < 4 && currentTime - start > 2) {
          return {
            start: start,
            end: end
          };
        }
      }

      return null;
    };

    return PlaybackWatcher;
  }();

  var defaultOptions = {
    errorInterval: 30,
    getSource: function getSource(next) {
      var tech = this.tech({IWillNotUseThisInPlugins: true});
      var sourceObj = tech.currentSource_;

      return next(sourceObj);
    }
  };

  /**
   * Main entry point for the plugin
   *
   * @param {Player} player a reference to a videojs Player instance
   * @param {Object} [options] an object with plugin options
   * @private
   */
  var initPlugin = function initPlugin(player, options) {
    var lastCalled = 0;
    var seekTo = 0;
    var localOptions = videojs$1.mergeOptions(defaultOptions, options);

    player.ready(function () {
      player.trigger({type: 'usage', name: 'hls-error-reload-initialized'});
    });

    /**
     * Player modifications to perform that must wait until `loadedmetadata`
     * has been triggered
     *
     * @private
     */
    var loadedMetadataHandler = function loadedMetadataHandler() {
      if (seekTo) {
        player.currentTime(seekTo);
      }
    };

    /**
     * Set the source on the player element, playOld, and seek if necessary
     *
     * @param {Object} sourceObj An object specifying the source url and mime-type to playOld
     * @private
     */
    var setSource = function setSource(sourceObj) {
      if (sourceObj === null || sourceObj === undefined) {
        return;
      }
      seekTo = player.duration() !== Infinity && player.currentTime() || 0;

      player.one('loadedmetadata', loadedMetadataHandler);

      player.src(sourceObj);
      player.trigger({type: 'usage', name: 'hls-error-reload'});
      player.play();
    };

    /**
     * Attempt to get a source from either the built-in getSource function
     * or a custom function provided via the options
     *
     * @private
     */
    var errorHandler = function errorHandler() {
      // Do not attempt to reload the source if a source-reload occurred before
      // 'errorInterval' time has elapsed since the last source-reload
      if (Date.now() - lastCalled < localOptions.errorInterval * 1000) {
        player.trigger({type: 'usage', name: 'hls-error-reload-canceled'});
        return;
      }

      if (!localOptions.getSource || typeof localOptions.getSource !== 'function') {
        videojs$1.log.error('ERROR: reloadSourceOnError - The option getSource must be a function!');
        return;
      }
      lastCalled = Date.now();

      return localOptions.getSource.call(player, setSource);
    };

    /**
     * Unbind any event handlers that were bound by the plugin
     *
     * @private
     */
    var cleanupEvents = function cleanupEvents() {
      player.off('loadedmetadata', loadedMetadataHandler);
      player.off('error', errorHandler);
      player.off('dispose', cleanupEvents);
    };

    /**
     * Cleanup before re-initializing the plugin
     *
     * @param {Object} [newOptions] an object with plugin options
     * @private
     */
    var reinitPlugin = function reinitPlugin(newOptions) {
      cleanupEvents();
      initPlugin(player, newOptions);
    };

    player.on('error', errorHandler);
    player.on('dispose', cleanupEvents);

    // Overwrite the plugin function so that we can correctly cleanup before
    // initializing the plugin
    player.reloadSourceOnError = reinitPlugin;
  };

  /**
   * Reload the source when an error is detected as long as there
   * wasn't an error previously within the last 30 seconds
   *
   * @param {Object} [options] an object with plugin options
   */
  var reloadSourceOnError = function reloadSourceOnError(options) {
    initPlugin(this, options);
  };

  var version$3 = "1.0.0";

  /**
   * @file videojs-http-streaming.js
   *
   * The main file for the HLS project.
   * License: https://github.com/videojs/videojs-http-streaming/blob/master/LICENSE
   */

  var Hls$1 = {
    PlaylistLoader: PlaylistLoader,
    Playlist: Playlist,
    Decrypter: Decrypter,
    AsyncStream: AsyncStream,
    decrypt: decrypt,
    utils: utils,

    STANDARD_PLAYLIST_SELECTOR: lastBandwidthSelector,
    INITIAL_PLAYLIST_SELECTOR: lowestBitrateCompatibleVariantSelector,
    comparePlaylistBandwidth: comparePlaylistBandwidth,
    comparePlaylistResolution: comparePlaylistResolution,

    xhr: xhrFactory()
  };

  // 0.5 MB/s
  var INITIAL_BANDWIDTH = 4194304;

  // Define getter/setters for config properites
  ['GOAL_BUFFER_LENGTH', 'MAX_GOAL_BUFFER_LENGTH', 'GOAL_BUFFER_LENGTH_RATE', 'BUFFER_LOW_WATER_LINE', 'MAX_BUFFER_LOW_WATER_LINE', 'BUFFER_LOW_WATER_LINE_RATE', 'BANDWIDTH_VARIANCE'].forEach(function (prop) {
    Object.defineProperty(Hls$1, prop, {
      get: function get$$1() {
        videojs$1.log.warn('using Hls.' + prop + ' is UNSAFE be sure you know what you are doing');
        return Config[prop];
      },
      set: function set$$1(value) {
        videojs$1.log.warn('using Hls.' + prop + ' is UNSAFE be sure you know what you are doing');

        if (typeof value !== 'number' || value < 0) {
          videojs$1.log.warn('value of Hls.' + prop + ' must be greater than or equal to 0');
          return;
        }

        Config[prop] = value;
      }
    });
  });

  var simpleTypeFromSourceType = function simpleTypeFromSourceType(type) {
    var mpegurlRE = /^(audio|video|application)\/(x-|vnd\.apple\.)?mpegurl/i;

    if (mpegurlRE.test(type)) {
      return 'hls';
    }

    var dashRE = /^application\/dash\+xml/i;

    if (dashRE.test(type)) {
      return 'dash';
    }

    return null;
  };

  /**
   * Updates the selectedIndex of the QualityLevelList when a mediachange happens in hls.
   *
   * @param {QualityLevelList} qualityLevels The QualityLevelList to update.
   * @param {PlaylistLoader} playlistLoader PlaylistLoader containing the new media info.
   * @function handleHlsMediaChange
   */
  var handleHlsMediaChange = function handleHlsMediaChange(qualityLevels, playlistLoader) {
    var newPlaylist = playlistLoader.media();
    var selectedIndex = -1;

    for (var i = 0; i < qualityLevels.length; i++) {
      if (qualityLevels[i].id === newPlaylist.uri) {
        selectedIndex = i;
        break;
      }
    }

    qualityLevels.selectedIndex_ = selectedIndex;
    qualityLevels.trigger({
      selectedIndex: selectedIndex,
      type: 'change'
    });
  };

  /**
   * Adds quality levels to list once playlist metadata is available
   *
   * @param {QualityLevelList} qualityLevels The QualityLevelList to attach events to.
   * @param {Object} hls Hls object to listen to for media events.
   * @function handleHlsLoadedMetadata
   */
  var handleHlsLoadedMetadata = function handleHlsLoadedMetadata(qualityLevels, hls) {
    hls.representations().forEach(function (rep) {
      qualityLevels.addQualityLevel(rep);
    });
    handleHlsMediaChange(qualityLevels, hls.playlists);
  };

  // HLS is a source handler, not a tech. Make sure attempts to use it
  // as one do not cause exceptions.
  Hls$1.canPlaySource = function () {
    return videojs$1.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\'s techOrder.');
  };

  var emeKeySystems = function emeKeySystems(keySystemOptions, videoPlaylist, audioPlaylist) {
    if (!keySystemOptions) {
      return keySystemOptions;
    }

    // upsert the content types based on the selected playlist
    var keySystemContentTypes = {};

    for (var keySystem in keySystemOptions) {
      keySystemContentTypes[keySystem] = {
        audioContentType: 'audio/mp4; codecs="' + audioPlaylist.attributes.CODECS + '"',
        videoContentType: 'video/mp4; codecs="' + videoPlaylist.attributes.CODECS + '"'
      };

      if (videoPlaylist.contentProtection && videoPlaylist.contentProtection[keySystem] && videoPlaylist.contentProtection[keySystem].pssh) {
        keySystemContentTypes[keySystem].pssh = videoPlaylist.contentProtection[keySystem].pssh;
      }

      // videojs-contrib-eme accepts the option of specifying: 'com.some.cdm': 'url'
      // so we need to prevent overwriting the URL entirely
      if (typeof keySystemOptions[keySystem] === 'string') {
        keySystemContentTypes[keySystem].url = keySystemOptions[keySystem];
      }
    }

    return videojs$1.mergeOptions(keySystemOptions, keySystemContentTypes);
  };

  var setupEmeOptions = function setupEmeOptions(hlsHandler) {
    if (hlsHandler.options_.sourceType !== 'dash') {
      return;
    }
    var player = videojs$1.players[hlsHandler.tech_.options_.playerId];

    if (player.eme) {
      var sourceOptions = emeKeySystems(hlsHandler.source_.keySystems, hlsHandler.playlists.media(), hlsHandler.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader.media());

      if (sourceOptions) {
        player.currentSource().keySystems = sourceOptions;
      }
    }
  };

  /**
   * Whether the browser has built-in HLS support.
   */
  Hls$1.supportsNativeHls = function () {
    var video = document_1.createElement('video');

    // native HLS is definitely not supported if HTML5 video isn't
    if (!videojs$1.getTech('Html5').isSupported()) {
      return false;
    }

    // HLS manifests can go by many mime-types
    var canPlay = [
      // Apple santioned
      'application/vnd.apple.mpegurl',
      // Apple sanctioned for backwards compatibility
      'audio/mpegurl',
      // Very common
      'audio/x-mpegurl',
      // Very common
      'application/x-mpegurl',
      // Included for completeness
      'video/x-mpegurl', 'video/mpegurl', 'application/mpegurl'];

    return canPlay.some(function (canItPlay) {
      return (/maybe|probably/i.test(video.canPlayType(canItPlay))
      );
    });
  }();

  Hls$1.supportsNativeDash = function () {
    if (!videojs$1.getTech('Html5').isSupported()) {
      return false;
    }

    return (/maybe|probably/i.test(document_1.createElement('video').canPlayType('application/dash+xml'))
    );
  }();

  Hls$1.supportsTypeNatively = function (type) {
    if (type === 'hls') {
      return Hls$1.supportsNativeHls;
    }

    if (type === 'dash') {
      return Hls$1.supportsNativeDash;
    }

    return false;
  };

  /**
   * HLS is a source handler, not a tech. Make sure attempts to use it
   * as one do not cause exceptions.
   */
  Hls$1.isSupported = function () {
    return videojs$1.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\'s techOrder.');
  };

  var Component$1 = videojs$1.getComponent('Component');

  /**
   * The Hls Handler object, where we orchestrate all of the parts
   * of HLS to interact with video.js
   *
   * @class HlsHandler
   * @extends videojs.Component
   * @param {Object} source the soruce object
   * @param {Tech} tech the parent tech object
   * @param {Object} options optional and required options
   */

  var HlsHandler = function (_Component) {
    inherits(HlsHandler, _Component);

    function HlsHandler(source, tech, options) {
      classCallCheck(this, HlsHandler);

      // tech.player() is deprecated but setup a reference to HLS for
      // backwards-compatibility
      var _this36 = possibleConstructorReturn(this, _Component.call(this, tech, options.hls));

      if (tech.options_ && tech.options_.playerId) {
        var _player = videojs$1(tech.options_.playerId);

        if (!_player.hasOwnProperty('hls')) {
          Object.defineProperty(_player, 'hls', {
            get: function get$$1() {
              videojs$1.log.warn('player.hls is deprecated. Use player.tech_.hls instead.');
              tech.trigger({type: 'usage', name: 'hls-player-access'});
              return _this36;
            }
          });
        }

        // Set up a reference to the HlsHandler from player.vhs. This allows users to start
        // migrating from player.tech_.hls... to player.vhs... for API access. Although this
        // isn't the most appropriate form of reference for video.js (since all APIs should
        // be provided through core video.js), it is a common pattern for plugins, and vhs
        // will act accordingly.
        _player.vhs = _this36;
        // deprecated, for backwards compatibility
        _player.dash = _this36;
      }

      _this36.tech_ = tech;
      _this36.source_ = source;
      _this36.stats = {};
      _this36.ignoreNextSeekingEvent_ = false;
      _this36.setOptions_();

      // overriding native HLS only works if audio tracks have been emulated
      // error early if we're misconfigured:
      if (_this36.options_.overrideNative && (tech.featuresNativeVideoTracks || tech.featuresNativeAudioTracks)) {
        throw new Error('Overriding native HLS requires emulated tracks. ' + 'See https://git.io/vMpjB');
      }

      // listen for fullscreenchange events for this player so that we
      // can adjust our quality selection quickly
      _this36.on(document_1, ['fullscreenchange', 'webkitfullscreenchange', 'mozfullscreenchange', 'MSFullscreenChange'], function (event) {
        var fullscreenElement = document_1.fullscreenElement || document_1.webkitFullscreenElement || document_1.mozFullScreenElement || document_1.msFullscreenElement;

        if (fullscreenElement && fullscreenElement.contains(_this36.tech_.el())) {
          _this36.masterPlaylistController_.fastQualityChange_();
        }
      });

      _this36.on(_this36.tech_, 'seeking', function () {
        if (this.ignoreNextSeekingEvent_) {
          this.ignoreNextSeekingEvent_ = false;
          return;
        }

        this.setCurrentTime(this.tech_.currentTime());
      });
      _this36.on(_this36.tech_, 'error', function () {
        if (this.masterPlaylistController_) {
          this.masterPlaylistController_.pauseLoading();
        }
      });

      _this36.on(_this36.tech_, 'play', _this36.play);
      return _this36;
    }

    HlsHandler.prototype.setOptions_ = function setOptions_() {
      var _this37 = this;

      // defaults
      this.options_.withCredentials = this.options_.withCredentials || false;

      if (typeof this.options_.blacklistDuration !== 'number') {
        this.options_.blacklistDuration = 5 * 60;
      }

      // start playlist selection at a reasonable bandwidth for
      // broadband internet (0.5 MB/s) or mobile (0.0625 MB/s)
      if (typeof this.options_.bandwidth !== 'number') {
        this.options_.bandwidth = INITIAL_BANDWIDTH;
      }

      // If the bandwidth number is unchanged from the initial setting
      // then this takes precedence over the enableLowInitialPlaylist option
      this.options_.enableLowInitialPlaylist = this.options_.enableLowInitialPlaylist && this.options_.bandwidth === INITIAL_BANDWIDTH;

      // grab options passed to player.src
      ['withCredentials', 'bandwidth'].forEach(function (option) {
        if (typeof _this37.source_[option] !== 'undefined') {
          _this37.options_[option] = _this37.source_[option];
        }
      });

      this.bandwidth = this.options_.bandwidth;
    };
    /**
     * called when player.src gets called, handle a new source
     *
     * @param {Object} src the source object to handle
     */


    HlsHandler.prototype.src = function src(_src, type) {
      var _this38 = this;

      // do nothing if the src is falsey
      if (!_src) {
        return;
      }
      this.setOptions_();
      // add master playlist controller options
      this.options_.url = this.source_.src;
      this.options_.tech = this.tech_;
      this.options_.externHls = Hls$1;
      this.options_.sourceType = simpleTypeFromSourceType(type);

      this.masterPlaylistController_ = new MasterPlaylistController(this.options_);
      this.playbackWatcher_ = new PlaybackWatcher(videojs$1.mergeOptions(this.options_, {
        seekable: function seekable() {
          return _this38.seekable();
        }
      }));

      this.masterPlaylistController_.on('error', function () {
        var player = videojs$1.players[_this38.tech_.options_.playerId];

        player.error(_this38.masterPlaylistController_.error);
      });

      // `this` in selectPlaylist should be the HlsHandler for backwards
      // compatibility with < v2
      this.masterPlaylistController_.selectPlaylist = this.selectPlaylist ? this.selectPlaylist.bind(this) : Hls$1.STANDARD_PLAYLIST_SELECTOR.bind(this);

      this.masterPlaylistController_.selectInitialPlaylist = Hls$1.INITIAL_PLAYLIST_SELECTOR.bind(this);

      // re-expose some internal objects for backwards compatibility with < v2
      this.playlists = this.masterPlaylistController_.masterPlaylistLoader_;
      this.mediaSource = this.masterPlaylistController_.mediaSource;

      // Proxy assignment of some properties to the master playlist
      // controller. Using a custom property for backwards compatibility
      // with < v2
      Object.defineProperties(this, {
        selectPlaylist: {
          get: function get$$1() {
            return this.masterPlaylistController_.selectPlaylist;
          },
          set: function set$$1(selectPlaylist) {
            this.masterPlaylistController_.selectPlaylist = selectPlaylist.bind(this);
          }
        },
        throughput: {
          get: function get$$1() {
            return this.masterPlaylistController_.mainSegmentLoader_.throughput.rate;
          },
          set: function set$$1(throughput) {
            this.masterPlaylistController_.mainSegmentLoader_.throughput.rate = throughput;
            // By setting `count` to 1 the throughput value becomes the starting value
            // for the cumulative average
            this.masterPlaylistController_.mainSegmentLoader_.throughput.count = 1;
          }
        },
        bandwidth: {
          get: function get$$1() {
            return this.masterPlaylistController_.mainSegmentLoader_.bandwidth;
          },
          set: function set$$1(bandwidth) {
            this.masterPlaylistController_.mainSegmentLoader_.bandwidth = bandwidth;
            // setting the bandwidth manually resets the throughput counter
            // `count` is set to zero that current value of `rate` isn't included
            // in the cumulative average
            this.masterPlaylistController_.mainSegmentLoader_.throughput = {
              rate: 0,
              count: 0
            };
          }
        },
        /**
         * `systemBandwidth` is a combination of two serial processes bit-rates. The first
         * is the network bitrate provided by `bandwidth` and the second is the bitrate of
         * the entire process after that - decryption, transmuxing, and appending - provided
         * by `throughput`.
         *
         * Since the two process are serial, the overall system bandwidth is given by:
         *   sysBandwidth = 1 / (1 / bandwidth + 1 / throughput)
         */
        systemBandwidth: {
          get: function get$$1() {
            var invBandwidth = 1 / (this.bandwidth || 1);
            var invThroughput = void 0;

            if (this.throughput > 0) {
              invThroughput = 1 / this.throughput;
            } else {
              invThroughput = 0;
            }

            var systemBitrate = Math.floor(1 / (invBandwidth + invThroughput));

            return systemBitrate;
          },
          set: function set$$1() {
            videojs$1.log.error('The "systemBandwidth" property is read-only');
          }
        }
      });

      Object.defineProperties(this.stats, {
        bandwidth: {
          get: function get$$1() {
            return _this38.bandwidth || 0;
          },
          enumerable: true
        },
        mediaRequests: {
          get: function get$$1() {
            return _this38.masterPlaylistController_.mediaRequests_() || 0;
          },
          enumerable: true
        },
        mediaRequestsAborted: {
          get: function get$$1() {
            return _this38.masterPlaylistController_.mediaRequestsAborted_() || 0;
          },
          enumerable: true
        },
        mediaRequestsTimedout: {
          get: function get$$1() {
            return _this38.masterPlaylistController_.mediaRequestsTimedout_() || 0;
          },
          enumerable: true
        },
        mediaRequestsErrored: {
          get: function get$$1() {
            return _this38.masterPlaylistController_.mediaRequestsErrored_() || 0;
          },
          enumerable: true
        },
        mediaTransferDuration: {
          get: function get$$1() {
            return _this38.masterPlaylistController_.mediaTransferDuration_() || 0;
          },
          enumerable: true
        },
        mediaBytesTransferred: {
          get: function get$$1() {
            return _this38.masterPlaylistController_.mediaBytesTransferred_() || 0;
          },
          enumerable: true
        },
        mediaSecondsLoaded: {
          get: function get$$1() {
            return _this38.masterPlaylistController_.mediaSecondsLoaded_() || 0;
          },
          enumerable: true
        },
        buffered: {
          get: function get$$1() {
            return timeRangesToArray(_this38.tech_.buffered());
          },
          enumerable: true
        },
        currentTime: {
          get: function get$$1() {
            return _this38.tech_.currentTime();
          },
          enumerable: true
        },
        currentSource: {
          get: function get$$1() {
            return _this38.tech_.currentSource_;
          },
          enumerable: true
        },
        currentTech: {
          get: function get$$1() {
            return _this38.tech_.name_;
          },
          enumerable: true
        },
        duration: {
          get: function get$$1() {
            return _this38.tech_.duration();
          },
          enumerable: true
        },
        master: {
          get: function get$$1() {
            return _this38.playlists.master;
          },
          enumerable: true
        },
        playerDimensions: {
          get: function get$$1() {
            return _this38.tech_.currentDimensions();
          },
          enumerable: true
        },
        seekable: {
          get: function get$$1() {
            return timeRangesToArray(_this38.tech_.seekable());
          },
          enumerable: true
        },
        timestamp: {
          get: function get$$1() {
            return Date.now();
          },
          enumerable: true
        },
        videoPlaybackQuality: {
          get: function get$$1() {
            return _this38.tech_.getVideoPlaybackQuality();
          },
          enumerable: true
        }
      });

      this.tech_.one('canplay', this.masterPlaylistController_.setupFirstPlay.bind(this.masterPlaylistController_));

      this.masterPlaylistController_.on('selectedinitialmedia', function () {
        // Add the manual rendition mix-in to HlsHandler
        renditionSelectionMixin(_this38);
        setupEmeOptions(_this38);
      });

      // the bandwidth of the primary segment loader is our best
      // estimate of overall bandwidth
      this.on(this.masterPlaylistController_, 'progress', function () {
        this.tech_.trigger('progress');
      });

      // In the live case, we need to ignore the very first `seeking` event since
      // that will be the result of the seek-to-live behavior
      this.on(this.masterPlaylistController_, 'firstplay', function () {
        this.ignoreNextSeekingEvent_ = true;
      });

      this.tech_.ready(function () {
        return _this38.setupQualityLevels_();
      });

      // do nothing if the tech has been disposed already
      // this can occur if someone sets the src in player.ready(), for instance
      if (!this.tech_.el()) {
        return;
      }

      this.tech_.src(videojs$1.URL.createObjectURL(this.masterPlaylistController_.mediaSource));
    };

    /**
     * Initializes the quality levels and sets listeners to update them.
     *
     * @method setupQualityLevels_
     * @private
     */


    HlsHandler.prototype.setupQualityLevels_ = function setupQualityLevels_() {
      var _this39 = this;

      var player = videojs$1.players[this.tech_.options_.playerId];

      if (player && player.qualityLevels) {
        this.qualityLevels_ = player.qualityLevels();

        this.masterPlaylistController_.on('selectedinitialmedia', function () {
          handleHlsLoadedMetadata(_this39.qualityLevels_, _this39);
        });

        this.playlists.on('mediachange', function () {
          handleHlsMediaChange(_this39.qualityLevels_, _this39.playlists);
        });
      }
    };

    /**
     * Begin playing the video.
     */


    HlsHandler.prototype.play = function play() {
      this.masterPlaylistController_.play();
    };

    /**
     * a wrapper around the function in MasterPlaylistController
     */


    HlsHandler.prototype.setCurrentTime = function setCurrentTime(currentTime) {
      this.masterPlaylistController_.setCurrentTime(currentTime);
    };

    /**
     * a wrapper around the function in MasterPlaylistController
     */


    HlsHandler.prototype.duration = function duration() {
      return this.masterPlaylistController_.duration();
    };

    /**
     * a wrapper around the function in MasterPlaylistController
     */


    HlsHandler.prototype.seekable = function seekable() {
      return this.masterPlaylistController_.seekable();
    };

    /**
     * Abort all outstanding work and cleanup.
     */


    HlsHandler.prototype.dispose = function dispose() {
      if (this.playbackWatcher_) {
        this.playbackWatcher_.dispose();
      }
      if (this.masterPlaylistController_) {
        this.masterPlaylistController_.dispose();
      }
      if (this.qualityLevels_) {
        this.qualityLevels_.dispose();
      }
      _Component.prototype.dispose.call(this);
    };

    return HlsHandler;
  }(Component$1);

  /**
   * The Source Handler object, which informs video.js what additional
   * MIME types are supported and sets up playback. It is registered
   * automatically to the appropriate tech based on the capabilities of
   * the browser it is running in. It is not necessary to use or modify
   * this object in normal usage.
   */


  var HlsSourceHandler = {
    name: 'videojs-http-streaming',
    VERSION: version$3,
    canHandleSource: function canHandleSource(srcObj) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

      var localOptions = videojs$1.mergeOptions(videojs$1.options, options);

      return HlsSourceHandler.canPlayType(srcObj.type, localOptions);
    },
    handleSource: function handleSource(source, tech) {
      var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

      var localOptions = videojs$1.mergeOptions(videojs$1.options, options);

      tech.hls = new HlsHandler(source, tech, localOptions);
      tech.hls.xhr = xhrFactory();

      tech.hls.src(source.src, source.type);
      return tech.hls;
    },
    canPlayType: function canPlayType(type) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

      var _videojs$mergeOptions = videojs$1.mergeOptions(videojs$1.options, options),
        overrideNative = _videojs$mergeOptions.hls.overrideNative;

      var supportedType = simpleTypeFromSourceType(type);
      var canUseMsePlayback = supportedType && (!Hls$1.supportsTypeNatively(supportedType) || overrideNative);

      return canUseMsePlayback ? 'maybe' : '';
    }
  };

  if (typeof videojs$1.MediaSource === 'undefined' || typeof videojs$1.URL === 'undefined') {
    videojs$1.MediaSource = MediaSource;
    videojs$1.URL = URL$1;
  }

  // register source handlers with the appropriate techs
  if (MediaSource.supportsNativeMediaSources()) {
    videojs$1.getTech('Html5').registerSourceHandler(HlsSourceHandler, 0);
  }

  videojs$1.HlsHandler = HlsHandler;
  videojs$1.HlsSourceHandler = HlsSourceHandler;
  videojs$1.Hls = Hls$1;
  if (!videojs$1.use) {
    videojs$1.registerComponent('Hls', Hls$1);
  }
  videojs$1.options.hls = videojs$1.options.hls || {};

  if (videojs$1.registerPlugin) {
    videojs$1.registerPlugin('reloadSourceOnError', reloadSourceOnError);
  } else {
    videojs$1.plugin('reloadSourceOnError', reloadSourceOnError);
  }

  return videojs$1;

})));
