通过pc浏览器获取麦克风并处理麦克风音频流

 (function(){
    navigator.getUserMedia=navigator.getUserMedia||navigator.mozGetUserMedia||navigator.webkitGetUserMedia||navigator.mozGetUserMedia;
    if (navigator.getUserMedia) {
 // console.log('navigator.getUserMedia');
        navigator.getUserMedia({            
            audio:true
        },onSuccess,onError);
    }
    else
    {
        throw new Error("sorry ,getUserMedia() is navigator supported in your browser");
    }
}())
function onSuccess(stream){
  //  alert("get the navigator getUserMedia");
    var audio=document.createElement("audio"); 
    audio.autoplay=true;   
   // console.log(stream.getAudioTracks());
    document.body.appendChild(audio);
    if (window.URL) {  
        // Chrome浏览器: URL.createObjectURL() 把 MediaStream 转为 blob URL  
        audio.src= window.URL.createObjectURL(stream);  
        console.log("ddd");
    } else {  
        // Firefox和Opera: 可以直接把视频源设置为stream  
        audio.src = stream;  
    }  
    // 播放  
    audio.play(); 
    // start.addEventListener('click',function(){beginbutton(video);},false);
    // pause.addEventListener('click',function(){stopbutton(video);},false);
}
function onError(){
    throw new Error("there is problem");
}