webrtc/samples/js/demos/html/device-switch.html

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<!DOCTYPE html>
<html>
<!-- Load the polyfill to switch-hit between Chrome and Firefox -->
<script src='../../base/adapter.js'></script>
<head>
<title>Device Switch Demo</title>
<style>
h2 {
font-size: 1em;
font-family: sans-serif;
margin: 0 0 0.5em 0;
padding: 0;
}
video {
width:40%;
}
</style>
</head>
<body>
<video id="vid1" autoplay muted></video>
<video id="vid2" autoplay></video>
<div>
<h2>Select an audio and video source, then click Start.</h2>
Audio source: <select id="audiosrc"></select>
Video source: <select id="videosrc"></select><br>
<button id="btn1">Start</button>
<button id="btn2">Call</button>
<button id="btn3">Hang Up</button>
</div>
<script>
var btn1 = document.querySelector('button#btn1');
var btn2 = document.querySelector('button#btn2');
var btn3 = document.querySelector('button#btn3');
var audio_select = document.getElementById("audiosrc");
var video_select = document.getElementById("videosrc");
//audio_select.onchange = changeDevices;
//video_select.onchange = changeDevices;
btn1.onclick = start;
btn2.onclick = call;
btn3.onclick = hangup;
btn1.disabled = false;
btn2.disabled = true;
btn3.disabled = true;
var pc1,pc2;
var localstream;
var sdpConstraints = {'mandatory': {
'OfferToReceiveAudio':true,
'OfferToReceiveVideo':true }};
refreshSources();
function refreshSources() {
if (webrtcDetectedVersion >= 30) {
MediaStreamTrack.getSources(gotSources);
} else {
alert('Make sure that you have Chrome M30 to test device enumeration api.');
}
}
function gotSources(sourceInfos) {
var audio_count = 0;
var video_count = 0;
audio_select.disabled = true;
video_select.disabled = true;
audio_select.innerHTML = '';
video_select.innerHTML = '';
for (var i = 0; i < sourceInfos.length; i++) {
var option = document.createElement("option");
option.value = sourceInfos[i].id;
option.text = sourceInfos[i].label;
if (sourceInfos[i].kind === 'audio') {
audio_count++;
if (option.text === '') {
option.text = 'Audio ' + audio_count;
}
audio_select.appendChild(option);
} else {
video_count++;
if (option.text === '') {
option.text = 'Video ' + video_count;
}
video_select.appendChild(option);
}
}
audio_select.disabled = false;
video_select.disabled = false;
}
function start() {
changeDevices();
btn1.disabled = true;
btn2.disabled = false;
audio_select.disabled = true;
video_select.disabled = true;
}
function changeDevices() {
var audio_source = null;
var video_source = null;
if (audio_select.options.length > 0) {
audio_source = audio_select.options[audio_select.selectedIndex].value;
trace('selected audio_source :' + audio_source);
}
if (video_select.options.length > 0 ) {
video_source = video_select.options[video_select.selectedIndex].value;
trace('selected video_source :' + video_source);
}
setWebcamAndMic(audio_source, video_source);
}
function setWebcamAndMic(audio_source, video_source) {
trace("Requesting local stream");
// Call into getUserMedia via the polyfill (adapter.js).
getUserMedia({ audio: {optional: [{sourceId: audio_source}]},
video: {optional: [{sourceId: video_source}]}
}, gotStream, function() {});
}
function gotStream(stream) {
trace("Received local stream");
// Call the polyfill wrapper to attach the media stream to this element.
attachMediaStream(vid1, stream);
localstream = stream;
}
function call() {
btn2.disabled = true;
btn3.disabled = false;
trace("Starting call");
videoTracks = localstream.getVideoTracks();
audioTracks = localstream.getAudioTracks();
if (videoTracks.length > 0) {
trace('Using Video device: ' + videoTracks[0].label);
}
if (audioTracks.length > 0) {
trace('Using Audio device: ' + audioTracks[0].label);
}
var servers = null;
pc1 = new RTCPeerConnection(servers);
trace("Created local peer connection object pc1");
pc1.onicecandidate = iceCallback1;
pc2 = new RTCPeerConnection(servers);
trace("Created remote peer connection object pc2");
pc2.onicecandidate = iceCallback2;
pc2.onaddstream = gotRemoteStream;
pc1.addStream(localstream);
trace("Adding Local Stream to peer connection");
pc1.createOffer(gotDescription1);
}
function gotDescription1(desc) {
pc1.setLocalDescription(desc);
trace("Offer from pc1 \n" + desc.sdp);
pc2.setRemoteDescription(desc);
// Since the "remote" side has no media stream we need
// to pass in the right constraints in order for it to
// accept the incoming offer of audio and video.
pc2.createAnswer(gotDescription2, null, sdpConstraints);
}
function gotDescription2(desc) {
pc2.setLocalDescription(desc);
trace("Answer from pc2 \n" + desc.sdp);
pc1.setRemoteDescription(desc);
}
function hangup() {
trace("Ending call");
localstream.stop();
pc1.close();
pc2.close();
pc1 = null;
pc2 = null;
btn3.disabled = true;
btn1.disabled = false;
audio_select.disabled = false;
video_select.disabled = false;
}
function gotRemoteStream(e) {
// Call the polyfill wrapper to attach the media stream to this element.
attachMediaStream(vid2, e.stream);
trace("Received remote stream");
}
function iceCallback1(event) {
if (event.candidate) {
pc2.addIceCandidate(new RTCIceCandidate(event.candidate));
trace("Local ICE candidate: \n" + event.candidate.candidate);
}
}
function iceCallback2(event) {
if (event.candidate) {
pc1.addIceCandidate(new RTCIceCandidate(event.candidate));
trace("Remote ICE candidate: \n " + event.candidate.candidate);
}
}
</script>
</body>
</html>