我想创建一个“一对多”（最多3个设备）webrtc设置。我有一台设备是我的主要设备。其他设备正在连接到该设备。你可以考虑一个随和的谈话。他们正在连接一台设备。
我有这个代码可以使用一对一的连接。
import AVFoundation
import UIKit
import WebRTC
import SocketIO
import CoreTelephony
import ReachabilitySwift
let TAG = "ViewController"
let AUDIO_TRACK_ID = TAG + "AUDIO"
let LOCAL_MEDIA_STREAM_ID = TAG + "STREAM"
class ViewController: UIViewController, RTCPeerConnectionDelegate, RTCDataChannelDelegate {
var mediaStream: RTCMediaStream!
var localAudioTrack: RTCAudioTrack!
var remoteAudioTrack: RTCAudioTrack!
var dataChannel: RTCDataChannel!
var dataChannelRemote: RTCDataChannel!
var roomName: String!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
initWebRTC();
sigConnect(wsUrl: "http://192.168.1.69:3000");
localAudioTrack = peerConnectionFactory.audioTrack(withTrackId: AUDIO_TRACK_ID)
mediaStream = peerConnectionFactory.mediaStream(withStreamId: LOCAL_MEDIA_STREAM_ID)
mediaStream.addAudioTrack(localAudioTrack)
}
func getRoomName() -> String {
return (roomName == nil || roomName.isEmpty) ? "_defaultroom": roomName;
}
// webrtc
var peerConnectionFactory: RTCPeerConnectionFactory! = nil
var peerConnection: RTCPeerConnection! = nil
var mediaConstraints: RTCMediaConstraints! = nil
var socket: SocketIOClient! = nil
var wsServerUrl: String! = nil
var peerStarted: Bool = false
func initWebRTC() {
RTCInitializeSSL()
peerConnectionFactory = RTCPeerConnectionFactory()
let mandatoryConstraints = ["OfferToReceiveAudio": "true", "OfferToReceiveVideo": "false"]
let optionalConstraints = [ "DtlsSrtpKeyAgreement": "true", "RtpDataChannels" : "true", "internalSctpDataChannels" : "true"]
mediaConstraints = RTCMediaConstraints.init(mandatoryConstraints: mandatoryConstraints, optionalConstraints: optionalConstraints)
}
func connect() {
if (!peerStarted) {
sendOffer()
peerStarted = true
}
}
func hangUp() {
sendDisconnect()
stop()
}
func stop() {
if (peerConnection != nil) {
peerConnection.close()
peerConnection = nil
peerStarted = false
}
}
func prepareNewConnection() -> RTCPeerConnection {
var icsServers: [RTCIceServer] = []
icsServers.append(RTCIceServer(urlStrings: ["stun:stun.l.google.com:19302"], username:"",credential: ""))
let rtcConfig: RTCConfiguration = RTCConfiguration()
rtcConfig.tcpCandidatePolicy = RTCTcpCandidatePolicy.disabled
rtcConfig.bundlePolicy = RTCBundlePolicy.maxBundle
rtcConfig.rtcpMuxPolicy = RTCRtcpMuxPolicy.require
rtcConfig.iceServers = icsServers;
peerConnection = peerConnectionFactory.peerConnection(with: rtcConfig, constraints: mediaConstraints, delegate: self)
peerConnection.add(mediaStream);
let tt = RTCDataChannelConfiguration();
tt.isOrdered = false;
self.dataChannel = peerConnection.dataChannel(forLabel: "testt", configuration: tt)
self.dataChannel.delegate = self
print("Make datachannel")
return peerConnection;
}
// RTCPeerConnectionDelegate - begin [ ///////////////////////////////////////////////////////////////////////////////
/** Called when the SignalingState changed. */
public func peerConnection(_ peerConnection: RTCPeerConnection, didChange stateChanged: RTCSignalingState){
print("signal state: \(stateChanged.rawValue)")
}
/** Called when media is received on a new stream from remote peer. */
public func peerConnection(_ peerConnection: RTCPeerConnection, didAdd stream: RTCMediaStream){
if (peerConnection == nil) {
return
}
if (stream.audioTracks.count > 1) {
print("Weird-looking stream: " + stream.description)
return
}
}
/** Called when a remote peer closes a stream. */
public func peerConnection(_ peerConnection: RTCPeerConnection, didRemove stream: RTCMediaStream){}
/** Called when negotiation is needed, for example ICE has restarted. */
public func peerConnectionShouldNegotiate(_ peerConnection: RTCPeerConnection){}
/** Called any time the IceConnectionState changes. */
public func peerConnection(_ peerConnection: RTCPeerConnection, didChange newState: RTCIceConnectionState){}
/** Called any time the IceGatheringState changes. */
public func peerConnection(_ peerConnection: RTCPeerConnection, didChange newState: RTCIceGatheringState){}
/** New ice candidate has been found. */
public func peerConnection(_ peerConnection: RTCPeerConnection, didGenerate candidate: RTCIceCandidate){
print("iceCandidate: " + candidate.description)
let json:[String: AnyObject] = [
"type" : "candidate" as AnyObject,
"sdpMLineIndex" : candidate.sdpMLineIndex as AnyObject,
"sdpMid" : candidate.sdpMid as AnyObject,
"candidate" : candidate.sdp as AnyObject
]
sigSendIce(msg: json as NSDictionary)
}
/** Called when a group of local Ice candidates have been removed. */
public func peerConnection(_ peerConnection: RTCPeerConnection, didRemove candidates: [RTCIceCandidate]){}
/** New data channel has been opened. */
public func peerConnection(_ peerConnection: RTCPeerConnection, didOpen dataChannel: RTCDataChannel){
print("Datachannel is open, name: \(dataChannel.label)")
dataChannel.delegate = self
self.dataChannelRemote = dataChannel
}
// RTCPeerConnectionDelegate - end ]/////////////////////////////////////////////////////////////////////////////////
public func dataChannel(_ dataChannel: RTCDataChannel, didReceiveMessageWith buffer: RTCDataBuffer){
print("iets ontvangen");
}
public func dataChannelDidChangeState(_ dataChannel: RTCDataChannel){
print("channel.state \(dataChannel.readyState.rawValue)");
}
func sendData(message: String) {
let newData = message.data(using: String.Encoding.utf8)
let dataBuff = RTCDataBuffer(data: newData!, isBinary: false)
self.dataChannel.sendData(dataBuff)
}
func onOffer(sdp:RTCSessionDescription) {
print("on offer shizzle")
setOffer(sdp: sdp)
sendAnswer()
peerStarted = true;
}
func onAnswer(sdp:RTCSessionDescription) {
setAnswer(sdp: sdp)
}
func onCandidate(candidate:RTCIceCandidate) {
peerConnection.add(candidate)
}
func sendSDP(sdp:RTCSessionDescription) {
print("Converting sdp...")
let json:[String: AnyObject] = [
"type" : sdp.type.rawValue as AnyObject,
"sdp" : sdp.sdp.description as AnyObject
]
sigSend(msg: json as NSDictionary);
}
func sendOffer() {
peerConnection = prepareNewConnection();
peerConnection.offer(for: mediaConstraints) { (RTCSessionDescription, Error) in
if(Error == nil){
print("send offer")
self.peerConnection.setLocalDescription(RTCSessionDescription!, completionHandler: { (Error) in
print("Sending: SDP")
print(RTCSessionDescription as Any)
self.sendSDP(sdp: RTCSessionDescription!)
})
} else {
print("sdp creation error: \(Error)")
}
}
}
func setOffer(sdp:RTCSessionDescription) {
if (peerConnection != nil) {
print("peer connection already exists")
}
peerConnection = prepareNewConnection();
peerConnection.setRemoteDescription(sdp) { (Error) in
}
}
func sendAnswer() {
print("sending Answer. Creating remote session description...")
if (peerConnection == nil) {
print("peerConnection NOT exist!")
return
}
peerConnection.answer(for: mediaConstraints) { (RTCSessionDescription, Error) in
print("ice shizzle")
if(Error == nil){
self.peerConnection.setLocalDescription(RTCSessionDescription!, completionHandler: { (Error) in
print("Sending: SDP")
print(RTCSessionDescription as Any)
self.sendSDP(sdp: RTCSessionDescription!)
})
} else {
print("sdp creation error: \(Error)")
}
}
}
func setAnswer(sdp:RTCSessionDescription) {
if (peerConnection == nil) {
print("peerConnection NOT exist!")
return
}
peerConnection.setRemoteDescription(sdp) { (Error) in
print("remote description")
}
}
func sendDisconnect() {
let json:[String: AnyObject] = [
"type" : "user disconnected" as AnyObject
]
sigSend(msg: json as NSDictionary);
}
// websocket related operations
func sigConnect(wsUrl:String) {
wsServerUrl = wsUrl;
print("connecting to " + wsServerUrl)
socket = SocketIOClient(socketURL: NSURL(string: wsServerUrl)! as URL)
socket.on("connect") { data in
print("WebSocket connection opened to: " + self.wsServerUrl);
self.sigEnter();
}
socket.on("disconnect") { data in
print("WebSocket connection closed.")
}
socket.on("message") { (data, emitter) in
if (data.count == 0) {
return
}
let json = data[0] as! NSDictionary
print("WSS->C: " + json.description);
let type = json["type"] as! Int
if (type == RTCSdpType.offer.rawValue) {
print("Received offer, set offer, sending answer....");
let sdp = RTCSessionDescription(type: RTCSdpType(rawValue: type)!, sdp: json["sdp"] as! String)
self.onOffer(sdp: sdp);
} else if (type == RTCSdpType.answer.rawValue && self.peerStarted) {
print("Received answer, setting answer SDP");
let sdp = RTCSessionDescription(type: RTCSdpType(rawValue: type)!, sdp: json["sdp"] as! String)
self.onAnswer(sdp: sdp);
} else {
print("Unexpected websocket message");
}
}
socket.on("ice") { (data, emitter) in
if (data.count == 0) {
return
}
let json = data[0] as! NSDictionary
print("WSS->C: " + json.description);
let type = json["type"] as! String
if (type == "candidate" && self.peerStarted) {
print("Received ICE candidate...");
let candidate = RTCIceCandidate(
sdp: json["candidate"] as! String,
sdpMLineIndex: Int32(json["sdpMLineIndex"] as! Int),
sdpMid: json["sdpMid"] as? String)
self.onCandidate(candidate: candidate);
} else {
print("Unexpected websocket message");
}
}
socket.connect();
}
func sigRecoonect() {
socket.disconnect();
socket.connect();
}
func sigEnter() {
let roomName = getRoomName();
print("Entering room: " + roomName);
socket.emit("enter", roomName);
}
func sigSend(msg:NSDictionary) {
socket.emit("message", msg)
}
func sigSendIce(msg:NSDictionary) {
socket.emit("ice", msg)
}
}
所以我认为我需要与同伴一起使用数组。而mediaStream，localAudioTrack和dataChannel需要是一个对象，因为本地音频是一样的吗？对此有好的解决方案吗？因为我不知道如何正确实现这一点。
我正在研究不同的问题和项目引用多呼叫webrtc设置。
我在GitHub上看到了这个（网站）webrtc设置： https://github.com/anoek/webrtc-group-chat-example/blob/master/client.html
我将尝试对此进行逆向工程以迅速:)。任何帮助都非常感谢。
答案 0 :(得分：3)
我建议反对一对多架构，其中单个设备需要将其媒体发送给所有其他设备。这会非常快地破坏（比如需要连接的2-3个设备）。
原因是上行链路的容量通常有限，即使它们不是，设备也不能真正适应将大量数据流式传输到许多其他设备。
要在＆＃34; scale＆＃34;上执行您想要的操作，请使用将媒体路由到其他设备的服务器组件。查看https://jitsi.org/和http://www.kurento.org/的起点。