播放器卡顿检测

gistfile1.js

var checkVideoBuffer = (function(){
var timer = null;
var timerOut = null;
var timerNum = 2000;

function checkBufferIng(oParam){
    var checkInterval  = 50;
    var lastPlayPos    = 0;
    var currentPlayPos = 0;
    var bufferingDetected = false;

    var checkBuffer = function(){

	currentPlayPos = oParam.videoDom.currentTime;

	var offset = (checkInterval - 20) / 1000;

	if (
		!bufferingDetected 
		&& currentPlayPos < (lastPlayPos + offset)
		&& !oParam.videoDom.paused
	    ) {
	    console.log("缓冲中...");
	    tafReport({
		sMetricName: 'wap.hls.buffer',
		guid: oParam.guid,
		auid: oParam.auid,
		errorCode: 1

	    });
	    bufferingDetected = true;
	}

	if (
	    bufferingDetected 
	    && currentPlayPos > (lastPlayPos + offset)
	    && !oParam.videoDom.paused
	    ) {
	    console.log("没有缓存了");
	    bufferingDetected = false;
	}
	lastPlayPos = currentPlayPos;
    }

    timer && clearInterval(timer);
    timer = setInterval(checkBuffer, checkInterval);
}

return function(oParam){    
    console.log(timerNum/1000 + 'S之后才开始检测')
    timerOut && clearTimeout(timerOut);

    timerOut = setTimeout(function() {
	console.log('开始检测')
	checkBufferIng(oParam);
    }, timerNum) 
}

})();