104 lines
2.8 KiB
JavaScript
Executable File
104 lines
2.8 KiB
JavaScript
Executable File
var localVideo;
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var localStream;
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var remoteVideo;
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var peerConnection;
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var uuid;
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var serverConnection;
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var peerConnectionConfig = {
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'iceServers': [
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{'urls': 'stun:stun.stunprotocol.org:3478'},
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{'urls': 'stun:stun.l.google.com:19302'},
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]
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};
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function pageReady() {
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uuid = createUUID();
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localVideo = document.getElementById('localVideo');
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remoteVideo = document.getElementById('remoteVideo');
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serverConnection = new WebSocket('wss://' + window.location.hostname + '');
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serverConnection.onmessage = gotMessageFromServer;
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var constraints = {
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video: true,
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audio: true,
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};
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if(navigator.mediaDevices.getUserMedia) {
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navigator.mediaDevices.getUserMedia(constraints).then(getUserMediaSuccess).catch(errorHandler);
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} else {
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alert('Your browser does not support getUserMedia API');
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}
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}
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function getUserMediaSuccess(stream) {
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localStream = stream;
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localVideo.srcObject = stream;
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}
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function start(isCaller) {
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peerConnection = new RTCPeerConnection(peerConnectionConfig);
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peerConnection.onicecandidate = gotIceCandidate;
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peerConnection.ontrack = gotRemoteStream;
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peerConnection.addStream(localStream);
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if(isCaller) {
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peerConnection.createOffer().then(createdDescription).catch(errorHandler);
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}
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}
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function gotMessageFromServer(message) {
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if(!peerConnection) start(false);
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var signal = JSON.parse(message.data);
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// Ignore messages from ourself
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if(signal.uuid == uuid) return;
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if(signal.sdp) {
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peerConnection.setRemoteDescription(new RTCSessionDescription(signal.sdp)).then(function() {
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// Only create answers in response to offers
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if(signal.sdp.type == 'offer') {
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peerConnection.createAnswer().then(createdDescription).catch(errorHandler);
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}
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}).catch(errorHandler);
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} else if(signal.ice) {
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peerConnection.addIceCandidate(new RTCIceCandidate(signal.ice)).catch(errorHandler);
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}
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}
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function gotIceCandidate(event) {
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if(event.candidate != null) {
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serverConnection.send(JSON.stringify({'ice': event.candidate, 'uuid': uuid}));
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}
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}
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function createdDescription(description) {
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console.log('got description');
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peerConnection.setLocalDescription(description).then(function() {
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serverConnection.send(JSON.stringify({'sdp': peerConnection.localDescription, 'uuid': uuid}));
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}).catch(errorHandler);
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}
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function gotRemoteStream(event) {
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console.log('got remote stream');
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remoteVideo.srcObject = event.streams[0];
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}
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function errorHandler(error) {
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console.log(error);
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}
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// Taken from http://stackoverflow.com/a/105074/515584
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// Strictly speaking, it's not a real UUID, but it gets the job done here
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function createUUID() {
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function s4() {
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return Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
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}
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return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
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}
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