You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
381 lines
11 KiB
JavaScript
381 lines
11 KiB
JavaScript
var WebRtcStreamer = (function () {
|
|
|
|
/**
|
|
* Interface with WebRTC-streamer API
|
|
* @constructor
|
|
* @param {string} videoElement - id of the video element tag
|
|
* @param {string} srvurl - url of webrtc-streamer (default is current location)
|
|
*/
|
|
var WebRtcStreamer = function WebRtcStreamer(videoElement, srvurl) {
|
|
if (typeof videoElement === "string") {
|
|
this.videoElement = document.getElementById(videoElement);
|
|
} else {
|
|
this.videoElement = videoElement;
|
|
}
|
|
this.srvurl = srvurl || location.protocol + "//" + window.location.hostname + ":" + window.location.port;
|
|
this.pc = null;
|
|
|
|
this.mediaConstraints = {
|
|
offerToReceiveAudio: true,
|
|
offerToReceiveVideo: true
|
|
};
|
|
|
|
this.iceServers = null;
|
|
this.earlyCandidates = [];
|
|
}
|
|
|
|
WebRtcStreamer.prototype._handleHttpErrors = function (response) {
|
|
if (!response.ok) {
|
|
throw Error(response.statusText);
|
|
}
|
|
return response;
|
|
}
|
|
|
|
/**
|
|
* Connect a WebRTC Stream to videoElement
|
|
* @param {string} videourl - id of WebRTC video stream
|
|
* @param {string} audiourl - id of WebRTC audio stream
|
|
* @param {string} options - options of WebRTC call
|
|
* @param {string} stream - local stream to send
|
|
* @param {string} prefmime - prefered mime
|
|
*/
|
|
WebRtcStreamer.prototype.connect = function (videourl, audiourl, options, localstream, prefmime) {
|
|
this.disconnect();
|
|
|
|
// getIceServers is not already received
|
|
if (!this.iceServers) {
|
|
console.log("Get IceServers");
|
|
|
|
fetch(this.srvurl + "/api/getIceServers")
|
|
.then(this._handleHttpErrors)
|
|
.then((response) => (response.json()))
|
|
.then((response) => this.onReceiveGetIceServers(response, videourl, audiourl, options, localstream, prefmime))
|
|
.catch((error) => this.onError("getIceServers " + error))
|
|
|
|
} else {
|
|
this.onReceiveGetIceServers(this.iceServers, videourl, audiourl, options, localstream, prefmime);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Disconnect a WebRTC Stream and clear videoElement source
|
|
*/
|
|
WebRtcStreamer.prototype.disconnect = function () {
|
|
if (this.videoElement?.srcObject) {
|
|
this.videoElement.srcObject.getTracks().forEach(track => {
|
|
track.stop()
|
|
this.videoElement.srcObject.removeTrack(track);
|
|
});
|
|
}
|
|
if (this.pc) {
|
|
fetch(this.srvurl + "/api/hangup?peerid=" + this.pc.peerid)
|
|
.then(this._handleHttpErrors)
|
|
.catch((error) => this.onError("hangup " + error))
|
|
|
|
|
|
try {
|
|
this.pc.close();
|
|
} catch (e) {
|
|
console.log("Failure close peer connection:" + e);
|
|
}
|
|
this.pc = null;
|
|
}
|
|
}
|
|
|
|
WebRtcStreamer.prototype.filterPreferredCodec = function (sdp, prefmime) {
|
|
const lines = sdp.split('\n');
|
|
const [prefkind, prefcodec] = prefmime.toLowerCase().split('/');
|
|
let currentMediaType = null;
|
|
let sdpSections = [];
|
|
let currentSection = [];
|
|
|
|
// Group lines into sections
|
|
lines.forEach(line => {
|
|
if (line.startsWith('m=')) {
|
|
if (currentSection.length) {
|
|
sdpSections.push(currentSection);
|
|
}
|
|
currentSection = [line];
|
|
} else {
|
|
currentSection.push(line);
|
|
}
|
|
});
|
|
sdpSections.push(currentSection);
|
|
|
|
// Process each section
|
|
const processedSections = sdpSections.map(section => {
|
|
const firstLine = section[0];
|
|
if (!firstLine.startsWith('m=' + prefkind)) {
|
|
return section.join('\n');
|
|
}
|
|
|
|
// Get payload types for preferred codec
|
|
const rtpLines = section.filter(line => line.startsWith('a=rtpmap:'));
|
|
const preferredPayloads = rtpLines
|
|
.filter(line => line.toLowerCase().includes(prefcodec))
|
|
.map(line => line.split(':')[1].split(' ')[0]);
|
|
|
|
if (preferredPayloads.length === 0) {
|
|
return section.join('\n');
|
|
}
|
|
|
|
// Modify m= line to only include preferred payloads
|
|
const mLine = firstLine.split(' ');
|
|
const newMLine = [...mLine.slice(0, 3), ...preferredPayloads].join(' ');
|
|
|
|
// Filter related attributes
|
|
const filteredLines = section.filter(line => {
|
|
if (line === firstLine) return false;
|
|
if (line.startsWith('a=rtpmap:')) {
|
|
return preferredPayloads.some(payload => line.startsWith(`a=rtpmap:${payload}`));
|
|
}
|
|
if (line.startsWith('a=fmtp:') || line.startsWith('a=rtcp-fb:')) {
|
|
return preferredPayloads.some(payload => line.startsWith(`a=${line.split(':')[0].split('a=')[1]}:${payload}`));
|
|
}
|
|
return true;
|
|
});
|
|
|
|
return [newMLine, ...filteredLines].join('\n');
|
|
});
|
|
|
|
return processedSections.join('\n');
|
|
}
|
|
|
|
/*
|
|
* GetIceServers callback
|
|
*/
|
|
WebRtcStreamer.prototype.onReceiveGetIceServers = function (iceServers, videourl, audiourl, options, stream, prefmime) {
|
|
this.iceServers = iceServers;
|
|
this.pcConfig = iceServers || {
|
|
"iceServers": []
|
|
};
|
|
try {
|
|
this.createPeerConnection();
|
|
|
|
let callurl = this.srvurl + "/api/call?peerid=" + this.pc.peerid + "&url=" + encodeURIComponent(videourl);
|
|
if (audiourl) {
|
|
callurl += "&audiourl=" + encodeURIComponent(audiourl);
|
|
}
|
|
if (options) {
|
|
callurl += "&options=" + encodeURIComponent(options);
|
|
}
|
|
|
|
if (stream) {
|
|
this.pc.addStream(stream);
|
|
}
|
|
|
|
// clear early candidates
|
|
this.earlyCandidates.length = 0;
|
|
|
|
// create Offer
|
|
this.pc.createOffer(this.mediaConstraints).then((sessionDescription) => {
|
|
console.log("Create offer:" + JSON.stringify(sessionDescription));
|
|
|
|
console.log(`video codecs:${Array.from(new Set(RTCRtpReceiver.getCapabilities("video")?.codecs?.map(codec => codec.mimeType)))}`)
|
|
console.log(`audio codecs:${Array.from(new Set(RTCRtpReceiver.getCapabilities("audio")?.codecs?.map(codec => codec.mimeType)))}`)
|
|
|
|
if (prefmime != undefined) {
|
|
//set prefered codec
|
|
let [prefkind] = prefmime.split('/');
|
|
if (prefkind != "video" && prefkind != "audio") {
|
|
prefkind = "video";
|
|
prefmime = prefkind + "/" + prefmime;
|
|
}
|
|
console.log("sdp:" + sessionDescription.sdp);
|
|
sessionDescription.sdp = this.filterPreferredCodec(sessionDescription.sdp, prefmime);
|
|
console.log("sdp:" + sessionDescription.sdp);
|
|
}
|
|
|
|
|
|
this.pc.setLocalDescription(sessionDescription)
|
|
.then(() => {
|
|
fetch(callurl, {
|
|
method: "POST",
|
|
body: JSON.stringify(sessionDescription)
|
|
})
|
|
.then(this._handleHttpErrors)
|
|
.then((response) => (response.json()))
|
|
.catch((error) => this.onError("call " + error))
|
|
.then((response) => this.onReceiveCall(response))
|
|
.catch((error) => this.onError("call " + error))
|
|
|
|
}, (error) => {
|
|
console.log("setLocalDescription error:" + JSON.stringify(error));
|
|
});
|
|
|
|
}, (error) => {
|
|
alert("Create offer error:" + JSON.stringify(error));
|
|
});
|
|
|
|
} catch (e) {
|
|
this.disconnect();
|
|
alert("connect error: " + e);
|
|
}
|
|
}
|
|
|
|
|
|
WebRtcStreamer.prototype.getIceCandidate = function () {
|
|
fetch(this.srvurl + "/api/getIceCandidate?peerid=" + this.pc.peerid)
|
|
.then(this._handleHttpErrors)
|
|
.then((response) => (response.json()))
|
|
.then((response) => this.onReceiveCandidate(response))
|
|
.catch((error) => this.onError("getIceCandidate " + error))
|
|
}
|
|
|
|
/*
|
|
* create RTCPeerConnection
|
|
*/
|
|
WebRtcStreamer.prototype.createPeerConnection = function () {
|
|
console.log("createPeerConnection config: " + JSON.stringify(this.pcConfig));
|
|
this.pc = new RTCPeerConnection(this.pcConfig);
|
|
let pc = this.pc;
|
|
pc.peerid = Math.random();
|
|
|
|
pc.onicecandidate = (evt) => this.onIceCandidate(evt);
|
|
pc.onaddstream = (evt) => this.onAddStream(evt);
|
|
pc.oniceconnectionstatechange = (evt) => {
|
|
console.log("oniceconnectionstatechange state: " + pc.iceConnectionState);
|
|
if (this.videoElement) {
|
|
if (pc.iceConnectionState === "connected") {
|
|
this.videoElement.style.opacity = "1.0";
|
|
} else if (pc.iceConnectionState === "disconnected") {
|
|
this.videoElement.style.opacity = "0.25";
|
|
} else if ((pc.iceConnectionState === "failed") || (pc.iceConnectionState === "closed")) {
|
|
this.videoElement.style.opacity = "0.5";
|
|
} else if (pc.iceConnectionState === "new") {
|
|
this.getIceCandidate();
|
|
}
|
|
}
|
|
}
|
|
pc.ondatachannel = function (evt) {
|
|
console.log("remote datachannel created:" + JSON.stringify(evt));
|
|
|
|
evt.channel.onopen = function () {
|
|
console.log("remote datachannel open");
|
|
this.send("remote channel openned");
|
|
}
|
|
evt.channel.onmessage = function (event) {
|
|
console.log("remote datachannel recv:" + JSON.stringify(event.data));
|
|
}
|
|
}
|
|
|
|
try {
|
|
let dataChannel = pc.createDataChannel("ClientDataChannel");
|
|
dataChannel.onopen = function () {
|
|
console.log("local datachannel open");
|
|
this.send("local channel openned");
|
|
}
|
|
dataChannel.onmessage = function (evt) {
|
|
console.log("local datachannel recv:" + JSON.stringify(evt.data));
|
|
}
|
|
} catch (e) {
|
|
console.log("Cannor create datachannel error: " + e);
|
|
}
|
|
|
|
console.log("Created RTCPeerConnnection with config: " + JSON.stringify(this.pcConfig));
|
|
return pc;
|
|
}
|
|
|
|
|
|
/*
|
|
* RTCPeerConnection IceCandidate callback
|
|
*/
|
|
WebRtcStreamer.prototype.onIceCandidate = function (event) {
|
|
if (event.candidate) {
|
|
if (this.pc.currentRemoteDescription) {
|
|
this.addIceCandidate(this.pc.peerid, event.candidate);
|
|
} else {
|
|
this.earlyCandidates.push(event.candidate);
|
|
}
|
|
} else {
|
|
console.log("End of candidates.");
|
|
}
|
|
}
|
|
|
|
|
|
WebRtcStreamer.prototype.addIceCandidate = function (peerid, candidate) {
|
|
fetch(this.srvurl + "/api/addIceCandidate?peerid=" + peerid, {
|
|
method: "POST",
|
|
body: JSON.stringify(candidate)
|
|
})
|
|
.then(this._handleHttpErrors)
|
|
.then((response) => (response.json()))
|
|
.then((response) => {
|
|
console.log("addIceCandidate ok:" + response)
|
|
})
|
|
.catch((error) => this.onError("addIceCandidate " + error))
|
|
}
|
|
|
|
/*
|
|
* RTCPeerConnection AddTrack callback
|
|
*/
|
|
WebRtcStreamer.prototype.onAddStream = function (event) {
|
|
console.log("Remote track added:" + JSON.stringify(event));
|
|
|
|
this.videoElement.srcObject = event.stream;
|
|
let promise = this.videoElement.play();
|
|
if (promise !== undefined) {
|
|
promise.catch((error) => {
|
|
console.warn("error:" + error);
|
|
this.videoElement.setAttribute("controls", true);
|
|
});
|
|
}
|
|
}
|
|
|
|
/*
|
|
* AJAX /call callback
|
|
*/
|
|
WebRtcStreamer.prototype.onReceiveCall = function (dataJson) {
|
|
|
|
console.log("offer: " + JSON.stringify(dataJson));
|
|
let descr = new RTCSessionDescription(dataJson);
|
|
this.pc.setRemoteDescription(descr).then(() => {
|
|
console.log("setRemoteDescription ok");
|
|
while (this.earlyCandidates.length) {
|
|
let candidate = this.earlyCandidates.shift();
|
|
this.addIceCandidate(this.pc.peerid, candidate);
|
|
}
|
|
|
|
this.getIceCandidate()
|
|
}, (error) => {
|
|
console.log("setRemoteDescription error:" + JSON.stringify(error));
|
|
});
|
|
}
|
|
|
|
/*
|
|
* AJAX /getIceCandidate callback
|
|
*/
|
|
WebRtcStreamer.prototype.onReceiveCandidate = function (dataJson) {
|
|
console.log("candidate: " + JSON.stringify(dataJson));
|
|
if (dataJson) {
|
|
for (let i = 0; i < dataJson.length; i++) {
|
|
let candidate = new RTCIceCandidate(dataJson[i]);
|
|
|
|
console.log("Adding ICE candidate :" + JSON.stringify(candidate));
|
|
this.pc.addIceCandidate(candidate).then(() => {
|
|
console.log("addIceCandidate OK");
|
|
}, (error) => {
|
|
console.log("addIceCandidate error:" + JSON.stringify(error));
|
|
});
|
|
}
|
|
this.pc.addIceCandidate();
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* AJAX callback for Error
|
|
*/
|
|
WebRtcStreamer.prototype.onError = function (status) {
|
|
console.log("onError:" + status);
|
|
}
|
|
|
|
return WebRtcStreamer;
|
|
})();
|
|
|
|
if (typeof window !== 'undefined' && typeof window.document !== 'undefined') {
|
|
window.WebRtcStreamer = WebRtcStreamer;
|
|
}
|
|
if (typeof module !== 'undefined' && typeof module.exports !== 'undefined') {
|
|
module.exports = WebRtcStreamer;
|
|
} |