private static async void MessageReceived(WebSocketContext context, string msg)
{
//Console.WriteLine($"websocket recv: {msg}");
var offerSDP = SDP.ParseSDPDescription(msg);
Console.WriteLine($"offer sdp: {offerSDP}");
var webRtcSession = new WebRtcSession(
AddressFamily.InterNetwork,
DTLS_CERTIFICATE_FINGERPRINT,
null,
null);
webRtcSession.setRemoteDescription(new RTCSessionDescription {
sdp = offerSDP, type = RTCSdpType.offer
});
webRtcSession.OnReceiveReport += RtpSession_OnReceiveReport;
webRtcSession.OnSendReport += RtpSession_OnSendReport;
webRtcSession.OnRtpPacketReceived += RtpSession_OnRtpPacketReceived;
webRtcSession.OnClose += (reason) =>
{
Console.WriteLine($"webrtc session closed: {reason}");
_webRtcSessions.Remove(webRtcSession);
};
// Add local recvonly tracks. This ensures that the SDP answer includes only
// the codecs we support.
MediaStreamTrack audioTrack = new MediaStreamTrack(null, SDPMediaTypesEnum.audio, false, new List <SDPMediaFormat> {
new SDPMediaFormat(SDPMediaFormatsEnum.PCMU)
});
audioTrack.Transceiver.SetStreamStatus(MediaStreamStatusEnum.RecvOnly);
webRtcSession.addTrack(audioTrack);
MediaStreamTrack videoTrack = new MediaStreamTrack(null, SDPMediaTypesEnum.video, false, new List <SDPMediaFormat> {
new SDPMediaFormat(SDPMediaFormatsEnum.VP8)
});
videoTrack.Transceiver.SetStreamStatus(MediaStreamStatusEnum.RecvOnly);
webRtcSession.addTrack(videoTrack);
var answerSdp = await webRtcSession.createAnswer();
webRtcSession.setLocalDescription(new RTCSessionDescription {
sdp = answerSdp, type = RTCSdpType.answer
});
Console.WriteLine($"answer sdp: {answerSdp}");
context.WebSocket.Send(answerSdp.ToString());
if (DoDtlsHandshake(webRtcSession))
{
_webRtcSessions.Add(webRtcSession);
}
else
{
webRtcSession.Close("dtls handshake failed.");
}
}