/// <summary>
/// Entry point for the reading task which read incoming messages from the
/// receiving pipe and dispatch them through events to the WebRTC peer.
/// </summary>
private void ProcessIncomingMessages()
{
// ReadLine() will block while waiting for a new line
string line;
while ((line = _recvStream.ReadLine()) != null)
{
Console.WriteLine($"[<-] {line}");
if (line == "ice")
{
string sdpMid = _recvStream.ReadLine();
int sdpMlineindex = int.Parse(_recvStream.ReadLine());
// The ICE candidate is a multi-line field, ends with an empty line
string candidate = "";
while ((line = _recvStream.ReadLine()) != null)
{
if (line.Length == 0)
{
break;
}
candidate += line;
candidate += "\n";
}
Console.WriteLine($"[<-] ICE candidate: {sdpMid} {sdpMlineindex} {candidate}");
var iceCandidate = new IceCandidate
{
SdpMid = sdpMid,
SdpMlineIndex = sdpMlineindex,
Content = candidate
};
IceCandidateReceived?.Invoke(iceCandidate);
}
else if (line == "sdp")
{
string type = _recvStream.ReadLine();
// The SDP message content is a multi-line field, ends with an empty line
string sdp = "";
while ((line = _recvStream.ReadLine()) != null)
{
if (line.Length == 0)
{
break;
}
sdp += line;
sdp += "\n";
}
Console.WriteLine($"[<-] SDP message: {type} {sdp}");
var message = new SdpMessage {
Type = SdpMessage.StringToType(type), Content = sdp
};
SdpMessageReceived?.Invoke(message);
}
}
Console.WriteLine("Finished processing messages");
}
private async Task <string> ProcessIncomingMessage()
{
byte[] buffer = new byte[Config.SIGNALING_BUFFER_SIZE];
WebSocketReceiveResult result = await this.webSocket.ReceiveAsync(new ArraySegment <byte>(buffer), CancellationToken.None);
var messageBytes = new ArraySegment <byte>(buffer, 0, result.Count).ToArray();
using (MemoryStream ms = new MemoryStream(messageBytes))
{
StreamReader streamReader = new StreamReader(ms);
string messageStr = streamReader.ReadLine();
if (messageStr == "null")
{
return("continue");
}
if (messageStr == null)
{
return("end");
}
Dictionary <string, string> messageJson = JsonConvert.DeserializeObject <Dictionary <string, string> >(messageStr);
if (messageJson.ContainsKey("sdp"))
{
string type = messageJson["type"];
string sdp = messageJson["sdp"];
Console.WriteLine("[<-] sdp");
Console.WriteLine(type);
Console.WriteLine(sdp);
SdpMessage msg = new SdpMessage();
msg.Type = SdpMessage.StringToType(type);
msg.Content = sdp;
SdpMessageReceived?.Invoke(msg);
}
else if (messageJson.ContainsKey("candidate"))
{
string sdpMid = messageJson["sdpMid"];
string sdpMLineIndex = messageJson["sdpMLineIndex"];
string candidate = messageJson["candidate"];
Console.WriteLine("[<-] ice");
Console.WriteLine(candidate);
Console.WriteLine(sdpMLineIndex);
Console.WriteLine(sdpMid);
IceCandidate msg = new IceCandidate();
msg.SdpMid = sdpMid;
msg.SdpMlineIndex = Int32.Parse(sdpMLineIndex);
msg.Content = candidate;
IceCandidateReceived?.Invoke(msg);
}
}
if (result.CloseStatus.HasValue)
{
return("end");
}
else
{
return("continue");
}
}
static async Task Main()
{
try
{
Console.WriteLine("Starting...");
//create and Initialize capture object to record audio
var waveFormat = new WaveFormat(44100, 32, 2, AudioEncoding.MpegLayer3);
WasapiCapture capture = new WasapiCapture(true, AudioClientShareMode.Shared, 100, waveFormat);
//initialize the selected device for recording
capture.Initialize();
//fill ice servers here
List <string> urls = new List <string>();
using var pc = new PeerConnection();
var config = new PeerConnectionConfiguration
{
IceServers = new List <IceServer> {
new IceServer {
Urls = urls,
}
}
,
BundlePolicy = BundlePolicy.MaxBundle
};
await pc.InitializeAsync(config);
Console.WriteLine("Peer connection initialized.");
//create audio transceiver
Transceiver transceiver = pc.AddTransceiver(MediaKind.Audio);
transceiver.DesiredDirection = Transceiver.Direction.ReceiveOnly;
Console.WriteLine("Create audio transceiver ...");
DataChannel chanel = await pc.AddDataChannelAsync("Data", true, true, cancellationToken : default);
string url = "";
WebSocketSharp.WebSocket signaling = new WebSocket(url);
signaling.SslConfiguration.EnabledSslProtocols = System.Security.Authentication.SslProtocols.Tls12;
signaling.OnMessage += async(sender, message) =>
{
try
{
//response messages may differ from service provider to another, adjust WebsocketResponse object accordingly
var messageObject = JsonConvert.DeserializeObject <WebsocketResponse>(message.Data);
var mess = new SdpMessage {
Content = messageObject.Data.Sdp, Type = SdpMessage.StringToType("answer")
};
if (!string.IsNullOrEmpty(mess.Content))
{
Console.WriteLine("Sdpmessage: {0}, Type: {1}", mess.Content, mess.Type);
await pc.SetRemoteDescriptionAsync(mess);
if (mess.Type == SdpMessageType.Answer)
{
bool res = pc.CreateAnswer();
Console.WriteLine("Answer created? {0}", res);
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
};
signaling.OnError += (sender, e) =>
{
Console.WriteLine(e.Message, e.Exception);
};
signaling.OnOpen += (sender, e) =>
{
pc.CreateOffer();
Console.WriteLine("open");
};
signaling.Connect();
transceiver.Associated += (tranciever) =>
{
Console.WriteLine("Transivier: {0}, {1}", tranciever.Name, tranciever.StreamIDs);
};
pc.LocalSdpReadytoSend += (SdpMessage message) =>
{
Console.WriteLine(message.Content);
//modify the offer message according to your need
var data = new
{
streamId = "",
sdp = message.Content
};
var payload = JsonConvert.SerializeObject(new
{
type = "cmd",
transId = 0,
name = "view",
data = data
});
Console.WriteLine("Sdp offer to send: " + payload);
signaling.Send(payload);
};
pc.RenegotiationNeeded += () =>
{
Console.WriteLine("Regotiation needed");
};
//when a remote audio track is added, start recording
pc.AudioTrackAdded += (RemoteAudioTrack track) =>
{
//create a wavewriter to write the data to
WaveWriter w = new WaveWriter("audio.mp3", capture.WaveFormat);
//setup an eventhandler to receive the recorded data
capture.DataAvailable += (s, e) =>
{
//save the recorded audio
w.Write(e.Data, e.Offset, e.ByteCount);
};
//start recording
capture.Start();
//this should output the sound
track.OutputToDevice(true);
//track.AudioFrameReady += (AudioFrame frame) =>
//{
//you can print anything here if you want to make sure that's you're recieving audio
//};
};
pc.Connected += () =>
{
Console.WriteLine("Connected");
Console.WriteLine(pc.DataChannels.Count);
};
pc.IceStateChanged += (IceConnectionState newState) =>
{
Console.WriteLine($"ICE state: {newState}");
};
Console.WriteLine("Press enter to stop");
Console.ReadLine();
//stop recording
capture.Stop();
pc.Close();
signaling.Close();
Console.WriteLine("Program termined.");
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
