private async Task AudioLoop()
{
var socket = new UdpSocket(EndPointInfo.SocketEndPoint);
var timer = new DriftTimer(TimeSpan.FromMilliseconds(PacketIntervalMilliseconds));
uint timestamp = 0;
ushort sequence = 0;
try
{
while (!_globalCancellationToken.IsCancellationRequested)
{
var packet = GetNextPacket(sequence, timestamp);
await timer.Wait(_globalCancellationToken);
if (packet.Length > 0)
{
await socket.Send(packet);
}
sequence++;
timestamp += (uint)SamplesPerPacket;
}
}
catch (TaskCanceledException)
{
// ignore
}
catch (Exception ex)
{
Logger.Error(ex, $"Exception in audio loop: {ex}");
}
finally
{
Logger.Debug("Audio loop stopped.");
ClearAudio();
if (TransmittingAudio)
{
TransmittingAudio = false;
Task.Run(() =>
{
OnAudioStop?.Invoke(this, EventArgs.Empty);
}).Forget();
}
}
}
private byte[] GetNextPacket(ushort sequence, uint timestamp)
{
if (_rawPayloadQueue.TryDequeue(out float[] payload))
{
if (!TransmittingAudio)
{
_packetlessStopwatch.Reset();
TransmittingAudio = true;
Task.Run(() =>
{
OnAudioStart?.Invoke(this, EventArgs.Empty);
}).Forget();
}
return(AssemblePacket(payload, sequence, timestamp));
}
else
{
if (TransmittingAudio)
{
if (!_packetlessStopwatch.IsRunning)
{
_packetlessStopwatch.Restart();
}
if (_packetlessStopwatch.Elapsed >= TimeSpan.FromSeconds(0.5))
{
TransmittingAudio = false;
Task.Run(() =>
{
OnAudioStop?.Invoke(this, EventArgs.Empty);
}).Forget();
}
}
}
return(new byte[0]);
}