android-cloud-H5/screenIos/decoder.js

var isFinish = false;
var decodeCount = 0;
var h264Queue = [];
var isFirst = true;

self.Module = 
{
    onRuntimeInitialized: function () 
	{
		isFinish = true;
        var ret = Module._openDecoder(720, 1280);
		if(!ret)
		{
			console.log("打开编码器成功");
		}
    }
};

self.importScripts("ffmpeghelper.js");

self.addEventListener('message', function (e) 
{
   h264Queue.push(e.data);
}, false);

function PrintfLog(str)
{
	var curTime = new Date().getTime();	
	var objData = {cmd:0, data:str, time:curTime};
	self.postMessage(objData);
}

function decodeAAC(data)
{
		var retPtr = Module._malloc(4 * 5 * 1024);//接收的数据
		var inputPtr = Module._malloc(4 * data.length);//输入数据
			
		for( i =0;i < data.length;i++)
		{
			Module.HEAPU8[(inputPtr)+i] = data[i];//转换为堆数据
		}
			
		var pcmLen = Module._feedData(retPtr, inputPtr, data.length);
			
		if(pcmLen > 0)
		{
			var pcmData = new Uint8Array(pcmLen);		
			for(i = 0;i < pcmLen;i++)
			{
				pcmData[i] = Module.HEAPU8[(retPtr)+i]
			}
				
				player.feed(pcmData);
			}
			else
			{
				console.log("%d帧 aac 解码失败, %d", decodeCount, pcmLen);
			}
			
			decodeCount++;
			Module._free(inputPtr);
			Module._free(retPtr);
}

setInterval(
	function()
	{
		if(h264Queue.length > 0 && isFinish)
		{
			if(isFirst)
			{
				PrintfLog("当前队列大小 :"  + h264Queue.length);
				isFirst = false;
			}
							
			if(h264Queue.length > 10 && isFinish)
			{
				PrintfLog("解不过来 " + h264Queue.length);
				//h264Queue.length = 0;
				return;
			}
			
			decodeH264(h264Queue.shift());
		}
		else
		{
			
		}
	}
,1);


function decodeH264(data)
{
	var retPtr = Module._malloc(2457600);//接收的数据
	var inputPtr = Module._malloc(data.length);//输入数据
			
	for( i =0;i < data.length;i++)
	{
		Module.HEAPU8[(inputPtr)+i] = data[i];//转换为堆数据
	}
			
	var time = new Date().getTime();
	var ret = Module._feedData(inputPtr, data.length, retPtr);
			
	if(ret >= 0)
	{
		//console.log("解码成功 %d, 耗时 %d ms", ret, new Date().getTime() - time);	
		if(decodeCount > 50)
		{		
			var curCost = new Date().getTime() - time;
			PrintfLog("解码耗时 " + curCost + " ms");
			decodeCount = 0;
		}
		decodeCount++;
		//console.log("解码耗时 %d ms", curCost);
	}
	else
	{
		//console.log("解码失败 %d", ret);
	}
			
	var yuvData = new Uint8Array(2457600);
	for(i = 0;i < yuvData.length;i++)
	{
		yuvData[i] = Module.HEAPU8[(retPtr)+i];
	}
			
	var curTime = new Date().getTime();	
	var objData = {cmd:1, data:yuvData, time:curTime};
	self.postMessage(objData);
	//webglPlayer.renderFrame(yuvData, 720, 1280, 720*1280, (720/2)*(1280/2));
	Module._free(inputPtr);
	Module._free(retPtr);
}
		

function closeDecoder()
{
	Module._destroyDecoder();
}