@l5i/dashjs
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A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.
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JavaScript
;Object.defineProperty(exports,'__esModule',{value:true});function _interopRequireDefault(obj){return obj && obj.__esModule?obj:{'default':obj};}var _coreFactoryMaker=require('../../../core/FactoryMaker');var _coreFactoryMaker2=_interopRequireDefault(_coreFactoryMaker);var _SwitchRequest=require('../SwitchRequest');var _SwitchRequest2=_interopRequireDefault(_SwitchRequest);var _coreDebug=require('../../../core/Debug');var _coreDebug2=_interopRequireDefault(_coreDebug);function DroppedFramesRule(){var context=this.context;var instance=undefined,logger=undefined;var DROPPED_PERCENTAGE_FORBID=0.15;var GOOD_SAMPLE_SIZE=375; //Don't apply the rule until this many frames have been rendered(and counted under those indices).
function setup(){logger = (0,_coreDebug2['default'])(context).getInstance().getLogger(instance);}function getMaxIndex(rulesContext){var droppedFramesHistory=rulesContext.getDroppedFramesHistory();if(droppedFramesHistory){var dfh=droppedFramesHistory.getFrameHistory();var droppedFrames=0;var totalFrames=0;var maxIndex=_SwitchRequest2['default'].NO_CHANGE;for(var i=1;i < dfh.length;i++) { //No point in measuring dropped frames for the zeroeth index.
if(dfh[i]){droppedFrames = dfh[i].droppedVideoFrames;totalFrames = dfh[i].totalVideoFrames;if(totalFrames > GOOD_SAMPLE_SIZE && droppedFrames / totalFrames > DROPPED_PERCENTAGE_FORBID){maxIndex = i - 1;logger.debug('index: ' + maxIndex + ' Dropped Frames: ' + droppedFrames + ' Total Frames: ' + totalFrames);break;}}}return (0,_SwitchRequest2['default'])(context).create(maxIndex,{droppedFrames:droppedFrames});}return (0,_SwitchRequest2['default'])(context).create();}instance = {getMaxIndex:getMaxIndex};setup();return instance;}DroppedFramesRule.__dashjs_factory_name = 'DroppedFramesRule';exports['default'] = _coreFactoryMaker2['default'].getClassFactory(DroppedFramesRule);module.exports = exports['default'];
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