navigator.mediaDevices.getUserMedia对移动端浏览器的兼容性

function gotStream(stream) {

    var audioCOntext= new AudioContext();

    inputPoint = audioContext.createGain();



    // Create an AudioNode from the stream.

    realAudioInput = audioContext.createMediaStreamSource(stream);

    audioInput = realAudioInput;

    audioInput.connect(inputPoint);



    analyserNode = audioContext.createAnalyser();

    analyserNode.fftSize = 2048;

    inputPoint.connect( analyserNode );



    audioRecorder = new Recorder( inputPoint );



    zeroGain = audioContext.createGain();

    zeroGain.gain.value = 0.0;

    inputPoint.connect( zeroGain );

    zeroGain.connect( audioContext.destination );

    updateAnalysers();

}

function getUserMedia(constrains,success,error){

    if(navigator.mediaDevices.getUserMedia){

        //最新标准API

        navigator.mediaDevices.getUserMedia(constrains).then(success).catch(error);

    } else if (navigator.webkitGetUserMedia){

        //webkit内核浏览器

        navigator.webkitGetUserMedia(constrains).then(success).catch(error);

    } else if (navigator.mozGetUserMedia){

        //Firefox浏览器

        navagator.mozGetUserMedia(constrains).then(success).catch(error);

    } else if (navigator.getUserMedia){

        //旧版API

        navigator.getUserMedia(constrains).then(success).catch(error);

    }

}



function initAudio() {

    if (navigator.mediaDevices.getUserMedia || navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia){

        //调用用户媒体设备，访问摄像头

            getUserMedia({

                audio:true

            },gotStream,error);

        } else {

            alert("你的浏览器不支持访问用户媒体设备");

        }

}

function error(error){

    console.log('访问媒体设备失败：',error.name,error.message)

}



window.addEventListener('load', initAudio );