android-cloud-H5/decoker/screenIosEdit/decoder.js

var isFinish = false;
var decodeCount = 0;
var h264Queue = [];
var ret;

self.Module = {
	onRuntimeInitialized: function() {
		isFinish = true;
		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) {
	
	var buffer = e.data;
	
	if(buffer[0] == 0xff)//音频解码
	{
		if(isFinish)
		{
			decodeAAC(buffer);
		}
	}
	else
	{
		h264Queue.push(buffer);
	}

}, 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(2048);//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 pcmLen = Module._feedAudio(inputPtr, data.length, retPtr);
			
		if(pcmLen > 0)
		{
			var pcmData = new Uint8Array(pcmLen);		
			for(i = 0;i < pcmLen;i++)
			{
				pcmData[i] = Module.HEAPU8[(retPtr)+i];
			}
			var curTime = new Date().getTime();	
			var objData = {cmd:2, data:pcmData, time:curTime};
			self.postMessage(objData);
		}
		else
		{
			console.log("aac 解码失败, %d", pcmLen);
		}
			
		Module._free(inputPtr);
		Module._free(retPtr);
}

var timeFlag = setInterval(
	function() {
		if (h264Queue.length > 0 && isFinish) {

			if (h264Queue.length > 15 && isFinish) 
			{
				PrintfLog("-------解不过来 ---------" + h264Queue.length);
				h264Queue.length = 0;
				return;
			}

			decodeH264(h264Queue.shift());
		} else {

		}
	}, 1);


function decodeH264(data) {
	 
	var nalType = data[4] & 0x1f;
	if(nalType == 7)
	{	
		console.log("decode sps");
	}
	
	if(nalType == 8)
	{	
		console.log("decode pps");
	}
	
	if(nalType == 5)
	{	
		console.log("decode i");
	}
	
	var yuvData = new Uint8Array(2457600);
	var retPtr = Module._malloc(2457600); //接收的数据
	if(retPtr == undefined)
	{
		retPtr = Module._malloc(2457600);
	}
	
	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);
	}

	
	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);
	Module._free(inputPtr);
	Module._free(retPtr);
}


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