public LocalVideoLink(VideoRouter parent, VideoSource source, IPeerConnection target)
{
if (source is null)
{
throw new ArgumentNullException(nameof(source));
}
if (target is null)
{
throw new ArgumentNullException(nameof(target));
}
if (null == source.VideoTrackSource)
{
throw new InvalidProgramException("VideoTrackSource is NULL");
}
TargetPeerConnection = target;
VideoSource = source;
_parent = parent
?? throw new ArgumentNullException(nameof(parent));
// Create track
var trackId = Guid.NewGuid();
_track = parent.PeerConnectionFactory.CreateVideoTrack(trackId.ToString(), source.VideoTrackSource);
// Find the first available transceiver (or create it)
GetOrCreateTransceiver(out var transceiver, out var isReusingTransceiver);
Transceiver = transceiver;
// Next, set/replace the track:
Transceiver.ToBusyState(_track);
// If we're re-using an existing transceivers.
// Transceiver metadata will need to be sent for clients to update their UIs.
// If we are creating new transceivers, no need to do this,
// since PeerConnection will re-negotiate automatically
if (isReusingTransceiver)
{
RaiseTransceiverMetadataUdatedEvent();
}
// If stream id has not been set, set it.
// WebRTC does not allow us to change the stream id, but we don't care either,
// we just want it to be unique.
if (string.IsNullOrWhiteSpace(Transceiver.Sender.StreamId))
{
Transceiver.Sender.StreamId = Guid.NewGuid().ToString();
}
// Add track to peer
_logger.Debug($"Local track created {_track}");
}
