我正在尝试在Chrome 29 Beta for Android上使用HTML5录制麦克风(它已经在其beta 29中启用了Web音频支持)。 在下面的代码中,ProcessAudio是Web音频过滤器函数,在其中我从麦克风接收输入缓冲区。 我得到了正确的采样大小。 但是,在移动版Chrome中,音频pcm样本始终为零。 Chrome是否禁用其移动版本中音频过滤器的输入? 是否有人成功在Chrome移动版中使用HTML5进行音频录制?以下代码在Chrome(桌面版)中正常工作。
<!DOCTYPE HTML>
<html>
<head>
<script>
function GetMedia(obj, fnSuccess, fnFailure)
{
if(navigator.getUserMedia)
{
return navigator.getUserMedia(obj, fnSuccess, fnFailure);
}
else if(navigator.webkitGetUserMedia)
{
return navigator.webkitGetUserMedia(obj, fnSuccess, fnFailure);
}
else if(navigator.mozGetUserMedia)
{
return navigator.mozGetUserMedia(obj, fnSuccess, fnFailure);
}
else if(navigator.msGetUserMedia)
{
return navigator.msGetUserMedia(obj, fnSuccess, fnFailure);
}
alert("no audio capture");
}
var incrementer = 0;
function ProcessAudio(e)
{
var inputBuffer = e.inputBuffer.getChannelData(0);
var outputBuffer = e.outputBuffer.getChannelData(0);
outputBuffer.set(inputBuffer, 0);
document.getElementById("display").innerText =
incrementer + " " + inputBuffer[0];
incrementer++;
}
var context = null;
function Success(localMediaStream)
{
context = new window.webkitAudioContext();
var microphone = context.createMediaStreamSource(localMediaStream);
var node = context.createScriptProcessor(4096, 1, 1);
node.onaudioprocess = ProcessAudio;
microphone.connect(node);
node.connect(context.destination);
}
function Error(err)
{
alert("no audio support");
}
function load(e)
{
GetMedia({audio:true,video:false}, Success, Error);
}
</script>
</head>
<body onload="load(event)">
<div>Audio Player</div>
<div id="display"></div>
<video id="localvideo" autoplay="autoplay" style="opacity:1"></video>
</body>
</html>