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 MediaPlayerModel from '../../models/MediaPlayerModel.js';
  import PlaybackController from '../../controllers/PlaybackController.js';
  import FactoryMaker from '../../../core/FactoryMaker.js';
  
  function BufferLevelRule(config) {
  
      let instance;
      let context = this.context;
  
      let dashMetrics = config.dashMetrics;
      let metricsModel = config.metricsModel;
      let textSourceBuffer = config.textSourceBuffer;
  
      let mediaPlayerModel,
          playbackController;
  
      function setup() {
          mediaPlayerModel = MediaPlayerModel(context).getInstance();
          playbackController = PlaybackController(context).getInstance();
      }
  
      function execute(streamProcessor) {
  
          let representationInfo = streamProcessor.getCurrentRepresentationInfo();
          let mediaInfo = representationInfo.mediaInfo;
          let mediaType = mediaInfo.type;
          let metrics = metricsModel.getReadOnlyMetricsFor(mediaType);
          let bufferLevel = dashMetrics.getCurrentBufferLevel(metrics);
          let fragmentCount;
  
          fragmentCount = bufferLevel < getBufferTarget(streamProcessor, mediaType) ? 1 : 0;
          return fragmentCount === 1;
      }
  
      function reset() {}
  
      function getBufferTarget(streamProcessor, type) {
  
          let representationInfo = streamProcessor.getCurrentRepresentationInfo();
          let mediaInfo = representationInfo.mediaInfo;
          let streamInfo = mediaInfo.streamInfo;
          let abrController = streamProcessor.getABRController();
          let duration = streamInfo.manifestInfo.duration;
          let isLongFormContent = (duration >= mediaPlayerModel.getLongFormContentDurationThreshold());
          let bufferTarget = NaN;
  
          if (type === 'fragmentedText') {
              bufferTarget = textSourceBuffer.getAllTracksAreDisabled() ? 0 : representationInfo.fragmentDuration;
          } else {
              if (abrController.isPlayingAtTopQuality(streamInfo)) {
                  bufferTarget = isLongFormContent ? mediaPlayerModel.getBufferTimeAtTopQualityLongForm() : mediaPlayerModel.getBufferTimeAtTopQuality();
              }else {
                  bufferTarget = mediaPlayerModel.getStableBufferTime();
              }
          }
          return bufferTarget;
      }
  
      instance = {
          execute: execute,
          reset: reset
      };
      setup();
      return instance;
  }
  
  BufferLevelRule.__dashjs_factory_name = 'BufferLevelRule';
  export default FactoryMaker.getClassFactory(BufferLevelRule);
  