我有一个运行的node.js,用户将连接到它。offer和answer将通过node.js生成并发送。
我试图建立对等连接并传输相机流。我尝试在计算机位于同一子网时不使用ICE候选项来运行代码。之后我尝试实现ICE。但我不确定是否做得正确,或者如果计算机在同一子网上是否需要它。
var localStream;
//Connect to signaling server
var signalingChannel = io.connect('http://85.134.54.193:8001');
console.log("Connect to signaling server");
var servers = null;
var video1;
var video2;
var audio1;
var audio2;
var cfg = {"iceServers":[{"url":"stun:stun.l.google.com:19302"}]};//{ "iceServers": [{ "url": "stun:stun.l.google.com:19302" }] };
var con = { 'optional': [{'DtlsSrtpKeyAgreement': true}, {'RtpDataChannels': true }] };
var peerConnection;
//Runs after the page has been loaded
window.onload=function(){
//Gets ID for the video element which will display the local stream
video1 = document.getElementById("audio1");
//Gets ID for the video element which will display the remote stream
video2 = document.getElementById("audio2");
audio1 = document.getElementById("audio1");
audio2 = document.getElementById("audio2");
}
//Start button function
function caller(){
peerConnection = new webkitRTCPeerConnection(cfg);
navigator.webkitGetUserMedia({'audio':true, video:true}, function (stream) {
console.log("Got local audio", stream);
video1.src = window.webkitURL.createObjectURL(stream)
peerConnection.addStream(stream);
},
function ( err ) {
console.log( 'error: ', err );
});
console.log("Calling");
//Create Offer
peerConnection.createOffer(function (offerDesc) {
console.log("Created local offer", offerDesc.sdp);
peerConnection.setLocalDescription(offerDesc);
}, function () { console.warn("Couldn't create offer"); });
//ICE Candidates Generator
peerConnection.onicecandidate = function(evt) {
//When The Ice Gathering is complete
if (evt.target.iceGatheringState == "complete") {
//Create a new offer with ICE candidates
peerConnection.createOffer(function(offer) {
console.log("Offer with ICE candidates: " + offer.sdp);
signalingChannel.emit('offer', JSON.stringify(offer));
console.log("offer sent");
signalingChannel.on('answer', function(data){
console.log("Receive answer");
//The answer is set as the remote description for the offerer
peerConnection.setRemoteDescription(new RTCSessionDescription(JSON.parse(data)));
console.log("Set remote desc");
peerConnection.onaddstream = gotRemoteStream;
console.log("Add remote stream to peer connection");
});
});
}
}
}
function answerer(){
peerConnection = new webkitRTCPeerConnection(cfg);
navigator.webkitGetUserMedia({'audio':true, video:true}, function (stream) {
console.log("Got local audio", stream);
video1.src = window.webkitURL.createObjectURL(stream)
peerConnection.addStream(stream);
},
function ( err ) {
console.log( 'error: ', err );
});
console.log("Answering");
//Listen for offer
signalingChannel.on('offer', function(data){
console.log("Offer Received");
//Set the remote description from caller's local description
peerConnection.setRemoteDescription(new RTCSessionDescription(JSON.parse(data)));
//Generate answer after getting the remote description
peerConnection.createAnswer(function(sessionDescription) {
//Set local description
peerConnection.setLocalDescription(sessionDescription);
//The local desc will be the answer sent back to offerer
signalingChannel.emit('answer', JSON.stringify(sessionDescription));
console.log("Answer sent");
});
});
}
function gotRemoteStream(event){
video2.src = window.webkitURL.createObjectURL(event.stream);
}