private int playbackDevice_audioRequested(int handle, IntPtr buffer, int length, IntPtr user)
{
if (firstPlayProcCall)
{
// first call is synchronous, following calls are asynchronous.
firstPlayProcCall = false;
if (playbackQueue == null)
{
playbackQueue = new MemoryQueue();
}
else
{
playbackQueue.Clear();
}
return(0);
}
try {
lock (playback_lock) {
// read audio from users we're listening to
var frames = new List <RTPFrame>();
foreach (var voiceSet in voiceSets)
{
var guild = Discord.GetGuild(voiceSet.Key);
foreach (var listenStream in voiceSet.Value.listenStreams)
{
if (listenStream.Value == null)
{
continue;
}
var sender = guild.GetUser(listenStream.Key);
if (sender == null || sender.IsMuted || sender.IsSelfMuted || sender.IsSuppressed)
{
continue;
}
Log(LogSeverity.Debug, "listen:" + sender.Nickname + " frames[" + listenStream.Value.AvailableFrames + "]");
for (int f = 0; f < listenStream.Value.AvailableFrames; f++)
{
var frame = listenStream.Value.ReadFrameAsync(CancellationToken.None).GetAwaiter().GetResult();
if (frame.Missed)
{
Log(LogSeverity.Debug, "RTP frame missed");
}
frames.Add(frame);
}
}
}
// mix audio
frames.Sort((o1, o2) => (int)(o1.Timestamp - o2.Timestamp));
using (var stream = playbackQueue.AsStream(FileAccess.Write)) {
mixRTPFrames(frames, stream);
}
// send audio to playback device
using (var stream = Utils.OpenBuffer(buffer, length, FileAccess.Write)) {
playbackQueue.Dequeue(stream, Math.Min(Math.Max(0, playbackQueue.Length), length));
return((int)stream.Position);
}
}
} catch (OperationCanceledException) {
Log(LogSeverity.Debug, "Audio playback canceled");
return((int)BASSStreamProc.BASS_STREAMPROC_END);
} catch (Exception ex) {
Log(LogSeverity.Error, "Error in audio playback", ex);
return((int)BASSStreamProc.BASS_STREAMPROC_END);
}
}
public MemoryQueueStream(MemoryQueue queue, FileAccess access)
{
this.Queue = queue;
this.Access = access;
}
