dashjs
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A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.
32 lines (31 loc) • 4.06 kB
JavaScript
;Object.defineProperty(exports,"__esModule",{value:true});var _Constants=require('../../constants/Constants');var _Constants2=_interopRequireDefault(_Constants);var _FactoryMaker=require('../../../core/FactoryMaker');var _FactoryMaker2=_interopRequireDefault(_FactoryMaker);function _interopRequireDefault(obj){return obj&&obj.__esModule?obj:{default:obj};}/**
* 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.
*/function BufferLevelRule(config){config=config||{};var dashMetrics=config.dashMetrics;var mediaPlayerModel=config.mediaPlayerModel;var textController=config.textController;var abrController=config.abrController;var settings=config.settings;function setup(){}function execute(streamProcessor,videoTrackPresent){if(!streamProcessor){return true;}var bufferLevel=dashMetrics.getCurrentBufferLevel(streamProcessor.getType(),true);return bufferLevel<getBufferTarget(streamProcessor,videoTrackPresent);}function getBufferTarget(streamProcessor,videoTrackPresent){var bufferTarget=NaN;if(!streamProcessor){return bufferTarget;}var type=streamProcessor.getType();var representationInfo=streamProcessor.getRepresentationInfo();if(type===_Constants2.default.FRAGMENTED_TEXT){bufferTarget=textController.isTextEnabled()?representationInfo.fragmentDuration:0;}else if(type===_Constants2.default.AUDIO&&videoTrackPresent){var videoBufferLevel=dashMetrics.getCurrentBufferLevel(_Constants2.default.VIDEO,true);if(isNaN(representationInfo.fragmentDuration)){bufferTarget=videoBufferLevel;}else{bufferTarget=Math.max(videoBufferLevel,representationInfo.fragmentDuration);}}else{var streamInfo=representationInfo.mediaInfo.streamInfo;if(abrController.isPlayingAtTopQuality(streamInfo)){var isLongFormContent=streamInfo.manifestInfo.duration>=settings.get().streaming.longFormContentDurationThreshold;bufferTarget=isLongFormContent?settings.get().streaming.bufferTimeAtTopQualityLongForm:settings.get().streaming.bufferTimeAtTopQuality;}else{bufferTarget=mediaPlayerModel.getStableBufferTime();}}return bufferTarget;}var instance={execute:execute,getBufferTarget:getBufferTarget};setup();return instance;}BufferLevelRule.__dashjs_factory_name='BufferLevelRule';exports.default=_FactoryMaker2.default.getClassFactory(BufferLevelRule);
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