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main.js
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main.js
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/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
*/
'use strict';
const leftVideo = document.getElementById('leftVideo');
const rightVideo = document.getElementById('rightVideo');
let stream;
let pc1;
let pc2;
const offerOptions = {
offerToReceiveAudio: 1,
offerToReceiveVideo: 1
};
let startTime;
function maybeCreateStream() {
if (stream) {
return;
}
if (leftVideo.captureStream) {
stream = leftVideo.captureStream();
console.log('Captured stream from leftVideo with captureStream',
stream);
call();
} else if (leftVideo.mozCaptureStream) {
stream = leftVideo.mozCaptureStream();
console.log('Captured stream from leftVideo with mozCaptureStream()',
stream);
call();
} else {
console.log('captureStream() not supported');
}
}
// Video tag capture must be set up after video tracks are enumerated.
leftVideo.oncanplay = maybeCreateStream;
if (leftVideo.readyState >= 3) { // HAVE_FUTURE_DATA
// Video is already ready to play, call maybeCreateStream in case oncanplay
// fired before we registered the event handler.
maybeCreateStream();
}
leftVideo.play();
rightVideo.onloadedmetadata = () => {
console.log(`Remote video videoWidth: ${rightVideo.videoWidth}px, videoHeight: ${rightVideo.videoHeight}px`);
};
rightVideo.onresize = () => {
console.log(`Remote video size changed to ${rightVideo.videoWidth}x${rightVideo.videoHeight}`);
// We'll use the first onresize callback as an indication that
// video has started playing out.
if (startTime) {
const elapsedTime = window.performance.now() - startTime;
console.log('Setup time: ' + elapsedTime.toFixed(3) + 'ms');
startTime = null;
}
};
function call() {
console.log('Starting call');
startTime = window.performance.now();
const videoTracks = stream.getVideoTracks();
const audioTracks = stream.getAudioTracks();
if (videoTracks.length > 0) {
console.log(`Using video device: ${videoTracks[0].label}`);
}
if (audioTracks.length > 0) {
console.log(`Using audio device: ${audioTracks[0].label}`);
}
const servers = null;
pc1 = new RTCPeerConnection(servers);
console.log('Created local peer connection object pc1');
pc1.onicecandidate = e => onIceCandidate(pc1, e);
pc2 = new RTCPeerConnection(servers);
console.log('Created remote peer connection object pc2');
pc2.onicecandidate = e => onIceCandidate(pc2, e);
pc1.oniceconnectionstatechange = e => onIceStateChange(pc1, e);
pc2.oniceconnectionstatechange = e => onIceStateChange(pc2, e);
pc2.ontrack = gotRemoteStream;
stream.getTracks().forEach(track => pc1.addTrack(track, stream));
console.log('Added local stream to pc1');
console.log('pc1 createOffer start');
pc1.createOffer(onCreateOfferSuccess, onCreateSessionDescriptionError, offerOptions);
}
function onCreateSessionDescriptionError(error) {
console.log(`Failed to create session description: ${error.toString()}`);
}
function onCreateOfferSuccess(desc) {
console.log(`Offer from pc1
${desc.sdp}`);
console.log('pc1 setLocalDescription start');
pc1.setLocalDescription(desc, () => onSetLocalSuccess(pc1), onSetSessionDescriptionError);
console.log('pc2 setRemoteDescription start');
pc2.setRemoteDescription(desc, () => onSetRemoteSuccess(pc2), onSetSessionDescriptionError);
console.log('pc2 createAnswer start');
// Since the 'remote' side has no media stream we need
// to pass in the right constraints in order for it to
// accept the incoming offer of audio and video.
pc2.createAnswer(onCreateAnswerSuccess, onCreateSessionDescriptionError);
}
function onSetLocalSuccess(pc) {
console.log(`${getName(pc)} setLocalDescription complete`);
}
function onSetRemoteSuccess(pc) {
console.log(`${getName(pc)} setRemoteDescription complete`);
}
function onSetSessionDescriptionError(error) {
console.log(`Failed to set session description: ${error.toString()}`);
}
function gotRemoteStream(event) {
if (rightVideo.srcObject !== event.streams[0]) {
rightVideo.srcObject = event.streams[0];
console.log('pc2 received remote stream', event);
}
}
function onCreateAnswerSuccess(desc) {
console.log(`Answer from pc2:
${desc.sdp}`);
console.log('pc2 setLocalDescription start');
pc2.setLocalDescription(desc, () => onSetLocalSuccess(pc2), onSetSessionDescriptionError);
console.log('pc1 setRemoteDescription start');
pc1.setRemoteDescription(desc, () => onSetRemoteSuccess(pc1), onSetSessionDescriptionError);
}
function onIceCandidate(pc, event) {
getOtherPc(pc).addIceCandidate(event.candidate)
.then(
() => onAddIceCandidateSuccess(pc),
err => onAddIceCandidateError(pc, err)
);
console.log(`${getName(pc)} ICE candidate:
${event.candidate ?
event.candidate.candidate : '(null)'}`);
}
function onAddIceCandidateSuccess(pc) {
console.log(`${getName(pc)} addIceCandidate success`);
}
function onAddIceCandidateError(pc, error) {
console.log(`${getName(pc)} failed to add ICE Candidate: ${error.toString()}`);
}
function onIceStateChange(pc, event) {
if (pc) {
console.log(`${getName(pc)} ICE state: ${pc.iceConnectionState}`);
console.log('ICE state change event: ', event);
}
}
function getName(pc) {
return (pc === pc1) ? 'pc1' : 'pc2';
}
function getOtherPc(pc) {
return (pc === pc1) ? pc2 : pc1;
}