webrtc/samples/js/demos/html/local-audio-rendering.html

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Local Audio Rendering Demo</title>
<script type="text/javascript" src="../../base/adapter.js"></script>
<script>
var audioElement;
var buttonStart;
var buttonStop;
var localStream;
$ = function(id) {
return document.getElementById(id);
};
function start() {
var constraints = {audio:true, video:false};
getUserMedia(constraints, gotStream, gotStreamFailed);
buttonStart.disabled = true;
buttonStop.disabled = false;
}
function stop() {
buttonStart.enabled = true;
buttonStop.enabled = false;
localStream.stop();
}
function gotStream(stream) {
videoTracks = stream.getVideoTracks();
audioTracks = stream.getAudioTracks();
if (audioTracks.length == 1 && videoTracks.length == 0) {
console.log('gotStream({audio:true, video:false})');
console.log('Using audio device: ' + audioTracks[0].label);
attachMediaStream(audioElement, stream);
stream.onended = function() {
console.log('stream.onended');
buttonStart.disabled = false;
buttonStop.disabled = true;
};
localStream = stream;
} else {
alert('The media stream contains an invalid amount of audio tracks.');
stream.stop();
}
}
function gotStreamFailed(error) {
buttonStart.disabled = false;
buttonStop.disabled = true;
alert('Failed to get access to local media. Error code: ' + error.code);
}
function onload() {
audioElement = $('audio');
buttonStart = $('start');
buttonStop = $('stop');
buttonStart.enabled = true;
buttonStop.disabled = true;
}
</script>
</head>
<body onload="onload()">
<h2>Rendering of a local media stream using &lt;audio&gt;</h2>
<p>Demonstrates usage of a local media stream connected to an HTML5 audio tag.<br>
Press Start, select a microphone and listen to your own voice in loopback.</p>
<style>
button {
font: 14px sans-serif;
padding: 8px;
}
</style>
<audio id="audio" autoplay="autoplay" controls="controls"></audio><br><br>
<button id="start" onclick="start()">Start</button>
<button id="stop" onclick="stop()">Stop</button>
</body>
</html>