public override async Task OnEnteringState()
{
Debug.Assert(Context.PeerConnection == null);
Context.VoipCoordinator.StartOutgoingCall(_callRequest);
var config = new RTCConfiguration
{
IceServers = WebRtcSettingsUtils.ToRTCIceServer(IceServerSettings.IceServers)
};
Context.PeerConnection = new RTCPeerConnection(config);
Context.LocalStream = await Context.Media.GetUserMedia(new RTCMediaStreamConstraints
{
videoEnabled = _callRequest.VideoEnabled,
audioEnabled = true
});
Context.PeerConnection.AddStream(Context.LocalStream);
var sdpOffer = await Context.PeerConnection.CreateOffer();
var sdpString = sdpOffer.Sdp;
SdpUtils.SelectCodecs(ref sdpString, DtoExtensions.FromDto(Context.GetAudioCodec()), DtoExtensions.FromDto(Context.GetVideoCodec()));
sdpOffer.Sdp = sdpString;
await Context.PeerConnection.SetLocalDescription(sdpOffer);
var tracks = Context.LocalStream.GetVideoTracks();
if (tracks.Count > 0)
{
#if WIN10
var source = Context.Media.CreateMediaSource(tracks[0], VoipContext.LocalMediaStreamId);
#else
var source = Context.Media.CreateMediaStreamSource(tracks[0], 30, VoipContext.LocalMediaStreamId);
#endif
Context.LocalVideoRenderer.SetupRenderer(Context.ForegroundProcessId, source, Context.LocalVideoControlSize);
}
Context.SendToPeer(RelayMessageTags.SdpOffer, sdpOffer.Sdp);
}
/// <summary>
/// Calls to connect to the selected peer.
/// </summary>
/// <param name="peer">Peer to connect to.</param>
public async void ConnectToPeer(Peer peer)
{
Debug.Assert(peer != null);
Debug.Assert(_peerId == -1);
if (_peerConnection != null)
{
Debug.WriteLine("[Error] Conductor: We only support connecting to one peer at a time");
return;
}
#if ORTCLIB
_signalingMode = Helper.SignalingModeForClientName(peer.Name);
#endif
_connectToPeerCancelationTokenSource = new System.Threading.CancellationTokenSource();
_connectToPeerTask = CreatePeerConnection(_connectToPeerCancelationTokenSource.Token);
bool connectResult = await _connectToPeerTask;
_connectToPeerTask = null;
_connectToPeerCancelationTokenSource.Dispose();
if (connectResult)
{
_peerId = peer.Id;
var offer = await _peerConnection.CreateOffer();
#if !ORTCLIB
// Alter sdp to force usage of selected codecs
string newSdp = offer.Sdp;
SdpUtils.SetMediaBitrate(ref newSdp, "video", VideoBitrate);
SdpUtils.SelectCodecs(ref newSdp, AudioCodec, VideoCodec);
offer.Sdp = newSdp;
#endif
await _peerConnection.SetLocalDescription(offer);
Debug.WriteLine("Conductor: Sending offer.");
SendSdp(offer);
#if ORTCLIB
OrtcStatsManager.Instance.StartCallWatch(SessionId, true);
#endif
}
}
public override async Task OnEnteringStateAsync()
{
if (_reason == Reason.HoldCall)
{
Context.VoipHelper.SetCallHeld();
}
else if (Context.VoipHelper.HasCall())
{
Context.VoipHelper.SetCallActive(Context.PeerId, Context.IsVideoEnabled);
}
else
{
Context.VoipHelper.StartOutgoingCall(Context.PeerId, Context.IsVideoEnabled);
}
// If PeerConnection is not null, then this is an SDP renegotiation.
if (Context.PeerConnection == null)
{
var config = new RTCConfiguration
{
IceServers = WebRtcSettingsUtils.ToRTCIceServer(IceServerSettings.IceServers)
};
Context.PeerConnection = new RTCPeerConnection(config);
}
switch (_reason)
{
case Reason.HoldCall:
{
// Even for just a renegotiation, it's easier to just teardown the media capture and start over.
if (Context.LocalStream != null)
{
Context.PeerConnection.RemoveStream(Context.LocalStream);
}
if (Context.RemoteStream != null)
{
Context.PeerConnection.RemoveStream(Context.RemoteStream);
}
foreach (var stream in Context.PeerConnection.GetLocalStreams())
{
Debug.WriteLine("Streams remaining.");
}
Context.LocalStream?.Stop();
Context.LocalStream = null;
Context.RemoteStream?.Stop();
Context.RemoteStream = null;
Context.ResetRenderers();
break;
}
case Reason.EstablishCall:
{
Context.LocalStream?.Stop();
Context.LocalStream = null;
Context.RemoteStream?.Stop();
Context.RemoteStream = null;
Context.ResetRenderers();
Context.LocalStream = await RtcManager.Instance.Media.GetUserMedia(new RTCMediaStreamConstraints
{
videoEnabled = Context.IsVideoEnabled,
audioEnabled = true
});
Context.PeerConnection.AddStream(Context.LocalStream);
// Setup the rendering of the local capture.
var tracks = Context.LocalStream.GetVideoTracks();
if (tracks.Count > 0)
{
var source = RtcManager.Instance.Media.CreateMediaSource(tracks[0], CallContext.LocalMediaStreamId);
Context.LocalVideoRenderer.SetupRenderer(Context.ForegroundProcessId, source, Context.LocalVideoControlSize);
}
break;
}
case Reason.SwitchCamera:
{
var videoDevice = await Context.MediaSettingsChannel.GetVideoDeviceAsync();
// We expect the camera we want to switch to is selected.
if (videoDevice == null)
{
// This could happen only in an error scenario and would have the
// effect of loosing the video.
// Since will not be able to continue the video call, just end the call.
await Context.SwitchState(new HangingUp());
return;
}
RtcManager.Instance.Media.SelectVideoDevice(videoDevice.FromDto());
// Remove old video track.
var videoTracks = Context.LocalStream.GetVideoTracks();
bool videoTrackEnabled = true;
if (videoTracks.Count > 0)
{
var oldVideoTrack = videoTracks[0];
videoTrackEnabled = oldVideoTrack.Enabled;
oldVideoTrack.Stop();
Context.LocalStream.RemoveTrack(oldVideoTrack);
}
videoTracks.Clear();
Context.ResetLocalRenderer();
// Create new stream having a new video track.
var newStream = await RtcManager.Instance.Media.GetUserMedia(new RTCMediaStreamConstraints
{
videoEnabled = true,
audioEnabled = false
});
// Move the new video track from new stream to old stream.
var newVideoTrack = newStream.GetVideoTracks().First();
newVideoTrack.Enabled = videoTrackEnabled;
Context.LocalStream.AddTrack(newVideoTrack);
newStream.RemoveTrack(newVideoTrack);
newStream.Stop();
var source = RtcManager.Instance.Media.CreateMediaSource(newVideoTrack, CallContext.LocalMediaStreamId);
Context.LocalVideoRenderer.SetupRenderer(Context.ForegroundProcessId, source, Context.LocalVideoControlSize);
break;
}
}
var sdpOffer = await Context.PeerConnection.CreateOffer();
var sdpString = sdpOffer.Sdp;
Org.WebRtc.CodecInfo videoCodecToUse = null;
// In case of camera switch, try to use the codec from the call's first SDP negotiation.
if (_reason == Reason.SwitchCamera && Context.VideoCodecUsed != null)
{
videoCodecToUse = Context.VideoCodecUsed;
}
else
{
videoCodecToUse = (await Hub.Instance.MediaSettingsChannel.GetVideoCodecAsync()).FromDto();
}
SdpUtils.SelectCodecs(ref sdpString,
(await Hub.Instance.MediaSettingsChannel.GetAudioCodecAsync()).FromDto(),
videoCodecToUse);
if (_reason == Reason.EstablishCall)
{
Context.VideoCodecUsed = videoCodecToUse;
}
sdpOffer.Sdp = sdpString;
await Context.PeerConnection.SetLocalDescription(sdpOffer);
Context.SendToPeer(RelayMessageTags.SdpOffer, sdpOffer.Sdp);
}