Function readMatroskaVInt

runtime/html5/static/recorder-core.js:1429–1441

(arr,pos,trim)

};
//读取一个可变长数值字节数组
var readMatroskaVInt=function(arr,pos,trim){
	var i=pos[0];
	if(i>=arr.length)return;
	var b0=arr[i],b2=("0000000"+b0.toString(2)).substr(-8);
	var m=/^(0*1)(\d*)$/.exec(b2);
	if(!m)return;
	var len=m[1].length, val=[];
	if(i+len>arr.length)return;
	for(var i2=0;i2<len;i2++){ val[i2]=arr[i]; i++; }
	if(trim) val[0]=parseInt(m[2]||'0',2);
	pos[0]=i;
	return val;
};
//读取一个自带长度的内容字节数组
var readMatroskaBlock=function(arr,pos){
	var lenVal=readMatroskaVInt(arr,pos,1);