private static RTCPeerConnection Createpc(WebSocketContext context, SDPAudioVideoMediaFormat videoFormat)
{
var pc = new RTCPeerConnection(null);
MediaStreamTrack videoTrack = new MediaStreamTrack(SDPMediaTypesEnum.video, false, new List <SDPAudioVideoMediaFormat> {
videoFormat
}, MediaStreamStatusEnum.SendOnly);
pc.addTrack(videoTrack);
pc.onicecandidateerror += (candidate, error) => logger.LogWarning($"Error adding remote ICE candidate. {error} {candidate}");
pc.oniceconnectionstatechange += (state) => logger.LogDebug($"ICE connection state change to {state}.");
//pc.OnReceiveReport += (type, rtcp) => logger.LogDebug($"RTCP {type} report received.");
pc.OnRtcpBye += (reason) => logger.LogDebug($"RTCP BYE receive, reason: {(string.IsNullOrWhiteSpace(reason) ? "<none>" : reason)}.");
pc.OnRtpClosed += (reason) => logger.LogDebug($"Peer connection closed, reason: {(string.IsNullOrWhiteSpace(reason) ? "<none>" : reason)}.");
pc.onicecandidate += (candidate) =>
{
if (pc.signalingState == RTCSignalingState.have_local_offer ||
pc.signalingState == RTCSignalingState.have_remote_offer)
{
context.WebSocket.Send($"candidate:{candidate}");
}
};
pc.onconnectionstatechange += (state) =>
{
logger.LogDebug($"Peer connection state changed to {state}.");
if (state == RTCPeerConnectionState.connected)
{
logger.LogDebug("Creating RTP session to receive ffmpeg stream.");
_ffmpegListener.OnRtpPacketReceived += (ep, media, rtpPkt) =>
{
if (media == SDPMediaTypesEnum.video && pc.VideoDestinationEndPoint != null)
{
//logger.LogDebug($"Forwarding {media} RTP packet to webrtc peer timestamp {rtpPkt.Header.Timestamp}.");
pc.SendRtpRaw(media, rtpPkt.Payload, rtpPkt.Header.Timestamp, rtpPkt.Header.MarkerBit, rtpPkt.Header.PayloadType);
}
};
}
};
return(pc);
}
public async Task <RTCSessionDescriptionInit> GotOffer(RTCSessionDescriptionInit offer)
{
_logger.LogDebug($"SDP offer received.");
_logger.LogTrace($"Offer SDP:\n{offer.sdp}");
var pc = new RTCPeerConnection();
if (_publicIPv4 != null)
{
var rtpPort = pc.GetRtpChannel().RTPPort;
var publicIPv4Candidate = new RTCIceCandidate(RTCIceProtocol.udp, _publicIPv4, (ushort)rtpPort, RTCIceCandidateType.host);
pc.addLocalIceCandidate(publicIPv4Candidate);
}
if (_publicIPv6 != null)
{
var rtpPort = pc.GetRtpChannel().RTPPort;
var publicIPv6Candidate = new RTCIceCandidate(RTCIceProtocol.udp, _publicIPv6, (ushort)rtpPort, RTCIceCandidateType.host);
pc.addLocalIceCandidate(publicIPv6Candidate);
}
MediaStreamTrack audioTrack = new MediaStreamTrack(SDPMediaTypesEnum.audio, false,
new List <SDPAudioVideoMediaFormat> {
new SDPAudioVideoMediaFormat(SDPWellKnownMediaFormatsEnum.PCMU)
}, MediaStreamStatusEnum.SendRecv);
pc.addTrack(audioTrack);
MediaStreamTrack videoTrack = new MediaStreamTrack(new VideoFormat(VideoCodecsEnum.VP8, VP8_PAYLOAD_ID), MediaStreamStatusEnum.SendRecv);
pc.addTrack(videoTrack);
pc.OnRtpPacketReceived += (IPEndPoint rep, SDPMediaTypesEnum media, RTPPacket rtpPkt) =>
{
pc.SendRtpRaw(media, rtpPkt.Payload, rtpPkt.Header.Timestamp, rtpPkt.Header.MarkerBit, rtpPkt.Header.PayloadType);
//_logger.LogDebug($"RTP {media} pkt received, SSRC {rtpPkt.Header.SyncSource}, SeqNum {rtpPkt.Header.SequenceNumber}.");
};
//peerConnection.OnReceiveReport += RtpSession_OnReceiveReport;
//peerConnection.OnSendReport += RtpSession_OnSendReport;
pc.OnTimeout += (mediaType) => _logger.LogWarning($"Timeout for {mediaType}.");
pc.onconnectionstatechange += (state) =>
{
_logger.LogDebug($"Peer connection state changed to {state}.");
if (state == RTCPeerConnectionState.failed)
{
pc.Close("ice failure");
}
};
var setResult = pc.setRemoteDescription(offer);
if (setResult == SetDescriptionResultEnum.OK)
{
var offerSdp = pc.createOffer(null);
await pc.setLocalDescription(offerSdp);
var answer = pc.createAnswer(null);
await pc.setLocalDescription(answer);
_logger.LogTrace($"Answer SDP:\n{answer.sdp}");
return(answer);
}
else
{
return(null);
}
}
public async Task <RTCSessionDescriptionInit> GotOffer(RTCSessionDescriptionInit offer)
{
logger.LogTrace($"SDP offer received.");
logger.LogTrace(offer.sdp);
var pc = new RTCPeerConnection();
if (_presetIceAddresses != null)
{
foreach (var addr in _presetIceAddresses)
{
var rtpPort = pc.GetRtpChannel().RTPPort;
var publicIPv4Candidate = new RTCIceCandidate(RTCIceProtocol.udp, addr, (ushort)rtpPort, RTCIceCandidateType.host);
pc.addLocalIceCandidate(publicIPv4Candidate);
}
}
MediaStreamTrack audioTrack = new MediaStreamTrack(SDPWellKnownMediaFormatsEnum.PCMU);
pc.addTrack(audioTrack);
MediaStreamTrack videoTrack = new MediaStreamTrack(new VideoFormat(VideoCodecsEnum.VP8, VP8_PAYLOAD_ID));
pc.addTrack(videoTrack);
pc.OnRtpPacketReceived += (IPEndPoint rep, SDPMediaTypesEnum media, RTPPacket rtpPkt) =>
{
pc.SendRtpRaw(media, rtpPkt.Payload, rtpPkt.Header.Timestamp, rtpPkt.Header.MarkerBit, rtpPkt.Header.PayloadType);
};
pc.OnTimeout += (mediaType) => logger.LogWarning($"Timeout for {mediaType}.");
pc.oniceconnectionstatechange += (state) => logger.LogInformation($"ICE connection state changed to {state}.");
pc.onsignalingstatechange += () => logger.LogInformation($"Signaling state changed to {pc.signalingState}.");
pc.onconnectionstatechange += (state) =>
{
logger.LogInformation($"Peer connection state changed to {state}.");
if (state == RTCPeerConnectionState.failed)
{
pc.Close("ice failure");
}
};
var setResult = pc.setRemoteDescription(offer);
if (setResult == SetDescriptionResultEnum.OK)
{
var offerSdp = pc.createOffer(null);
await pc.setLocalDescription(offerSdp);
var answer = pc.createAnswer(null);
logger.LogTrace($"SDP answer created.");
logger.LogTrace(answer.sdp);
return(answer);
}
else
{
logger.LogWarning($"Failed to set remote description {setResult}.");
return(null);
}
}