text: /**
   * The copyright in this software is being made available under the BSD License,
   * included below. This software may be subject to other third party and contributor
   * rights, including patent rights, and no such rights are granted under this license.
   *
   * Copyright (c) 2013, Dash Industry Forum.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *  * Redistributions of source code must retain the above copyright notice, this
   *  list of conditions and the following disclaimer.
   *  * 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.
   *  * Neither the name of Dash Industry Forum nor the names of its
   *  contributors may be used to endorse or promote products derived from this software
   *  without specific prior written permission.
   *
   *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 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 THE 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.
   */
  import FactoryMaker from '../../core/FactoryMaker.js';
  
  function MediaSourceController() {
  
      let instance;
  
      function createMediaSource() {
  
          var hasWebKit = ('WebKitMediaSource' in window);
          var hasMediaSource = ('MediaSource' in window);
  
          if (hasMediaSource) {
              return new MediaSource();
          } else if (hasWebKit) {
              return new WebKitMediaSource();
          }
  
          return null;
      }
  
      function attachMediaSource(source, videoModel) {
  
          var objectURL = window.URL.createObjectURL(source);
  
          videoModel.setSource(objectURL);
  
          return objectURL;
      }
  
      function detachMediaSource(videoModel) {
          videoModel.setSource(null);
      }
  
      function setDuration(source, value) {
  
          if (source.duration != value)
              source.duration = value;
  
          return source.duration;
      }
  
      function signalEndOfStream(source) {
  
          var buffers = source.sourceBuffers;
          var ln = buffers.length;
          var i = 0;
  
          if (source.readyState !== 'open') return;
  
          for (i; i < ln; i++) {
              if (buffers[i].updating) return;
              if (buffers[i].buffered.length === 0) return;
          }
  
          source.endOfStream();
      }
  
      instance = {
          createMediaSource: createMediaSource,
          attachMediaSource: attachMediaSource,
          detachMediaSource: detachMediaSource,
          setDuration: setDuration,
          signalEndOfStream: signalEndOfStream
      };
  
      return instance;
  }
  
  MediaSourceController.__dashjs_factory_name = 'MediaSourceController';
  export default FactoryMaker.getSingletonFactory(MediaSourceController);
  