private Task Stage2(VoiceSessionDescriptionPayload voiceSessionDescription)
{
SelectedEncryptionMode = Sodium.SupportedModes[voiceSessionDescription.Mode.ToLowerInvariant()];
Discord.DebugLogger.LogMessage(LogLevel.Debug, "VoiceNext", $"Discord updated encryption mode: {SelectedEncryptionMode}", DateTime.Now);
// start keepalive
KeepaliveTokenSource = new CancellationTokenSource();
KeepaliveTask = KeepaliveAsync();
// send 3 packets of silence to get things going
var nullpcm = new byte[AudioFormat.CalculateSampleSize(20)];
for (var i = 0; i < 3; i++)
{
var nullopus = new byte[nullpcm.Length];
var nullopusmem = nullopus.AsMemory();
PreparePacket(nullpcm, ref nullopusmem);
EnqueuePacket(new VoicePacket(nullopusmem, 20));
}
IsInitialized = true;
ReadyWait.SetResult(true);
return(Task.Delay(0));
}
private async Task VoiceSenderTask()
{
var token = SenderToken;
var client = UdpClient;
var queue = PacketQueue;
var synchronizerTicks = (double)Stopwatch.GetTimestamp();
var synchronizerResolution = (Stopwatch.Frequency * 0.005);
var tickResolution = 10_000_000.0 / Stopwatch.Frequency;
Discord.DebugLogger.LogMessage(LogLevel.Debug, "VoiceNext", $"Timer accuracy: {Stopwatch.Frequency.ToString("#,##0", CultureInfo.InvariantCulture)}/{synchronizerResolution.ToString(CultureInfo.InvariantCulture)} (high resolution? {Stopwatch.IsHighResolution})", DateTime.Now);
while (!token.IsCancellationRequested)
{
var hasPacket = queue.TryDequeue(out var packet);
byte[] packetArray = null;
if (hasPacket)
{
if (PlayingWait == null || PlayingWait.Task.IsCompleted)
{
PlayingWait = new TaskCompletionSource <bool>();
}
packetArray = packet.Bytes.ToArray();
}
// Provided by Laura#0090 (214796473689178133); this is Python, but adaptable:
//
// delay = max(0, self.delay + ((start_time + self.delay * loops) + - time.time()))
//
// self.delay
// sample size
// start_time
// time since streaming started
// loops
// number of samples sent
// time.time()
// DateTime.Now
var durationModifier = hasPacket ? packet.MillisecondDuration / 5 : 4;
var cts = Math.Max(Stopwatch.GetTimestamp() - synchronizerTicks, 0);
if (cts < synchronizerResolution * durationModifier)
{
await Task.Delay(TimeSpan.FromTicks((long)(((synchronizerResolution * durationModifier) - cts) * tickResolution))).ConfigureAwait(false);
}
synchronizerTicks += synchronizerResolution * durationModifier;
if (!hasPacket)
{
continue;
}
SendSpeaking(true);
await UdpClient.SendAsync(packetArray, packetArray.Length).ConfigureAwait(false);
if (!packet.IsSilence && queue.Count == 0)
{
var nullpcm = new byte[AudioFormat.CalculateSampleSize(20)];
for (var i = 0; i < 3; i++)
{
var nullpacket = new byte[nullpcm.Length];
var nullpacketmem = nullpacket.AsMemory();
PreparePacket(nullpcm, ref nullpacketmem);
EnqueuePacket(new VoicePacket(nullpacketmem, 20, true));
}
}
else if (queue.Count == 0)
{
SendSpeaking(false);
PlayingWait?.SetResult(true);
}
}
}