private static unsafe void Worker()
{
var utilityBuffer = new UnmanagedArray <short>(SamplesPerBuffer * MaxChannels);
var toRemove = new List <CompressedSoundSource>();
while (true)
{
toRemove.Clear();
while (!NewSources.IsEmpty)
{
CompressedSoundSource source;
if (!NewSources.TryTake(out source))
{
continue;
}
source.compressedSoundStream = ContentManager.FileProvider.OpenStream(source.soundStreamUrl, VirtualFileMode.Open, VirtualFileAccess.Read, VirtualFileShare.Read, StreamFlags.Seekable);
source.decoder = new Celt(source.sampleRate, SamplesPerFrame, source.channels, true);
source.compressedBuffer = new byte[source.maxCompressedSize];
source.reader = new BinarySerializationReader(source.compressedSoundStream);
Sources.Add(source);
}
foreach (var source in Sources)
{
if (!source.Disposed)
{
while (!source.Commands.IsEmpty)
{
AsyncCommand command;
if (!source.Commands.TryDequeue(out command))
{
continue;
}
switch (command)
{
case AsyncCommand.Play:
if (source.Playing && !source.Paused)
{
break;
}
if (!source.Paused)
{
source.Restart();
SourcePrepare(source);
SourcePlayAsync(source);
}
else
{
AudioLayer.SourcePlay(source.SoundInstance.Source);
}
source.playing = true;
source.Playing = true;
source.Paused = false;
source.PlayingQueued = false;
break;
case AsyncCommand.Pause:
source.Paused = true;
AudioLayer.SourcePause(source.SoundInstance.Source);
break;
case AsyncCommand.Stop:
source.Paused = false;
source.Playing = false;
source.playing = false;
AudioLayer.SourceStop(source.SoundInstance.Source);
break;
case AsyncCommand.SetRange:
source.Restart();
SourcePrepare(source);
break;
case AsyncCommand.Dispose:
AudioLayer.SourceDestroy(source.SoundInstance.Source);
source.Destroy();
source.Disposed = true;
toRemove.Add(source);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
source.PlayingState = (source.Playing && !source.Ended.Task.IsCompleted) || AudioLayer.SourceIsPlaying(source.SoundInstance.Source);
if (!source.Playing || !source.CanFill || !source.playing)
{
continue;
}
const int passes = SamplesPerBuffer / SamplesPerFrame;
var offset = 0;
var bufferPtr = (short *)utilityBuffer.Pointer;
var startingPacket = source.startingPacketIndex == source.currentPacketIndex;
var endingPacket = false;
for (var i = 0; i < passes; i++)
{
endingPacket = source.endPacketIndex == source.currentPacketIndex;
//read one packet, size first, then data
var len = source.reader.ReadInt16();
source.compressedSoundStream.Read(source.compressedBuffer, 0, len);
source.currentPacketIndex++;
var writePtr = bufferPtr + offset;
if (source.decoder.Decode(source.compressedBuffer, len, writePtr) != SamplesPerFrame)
{
throw new Exception("Celt decoder returned a wrong decoding buffer size.");
}
offset += SamplesPerFrame * source.channels;
if (source.compressedSoundStream.Position != source.compressedSoundStream.Length && !endingPacket)
{
continue;
}
if (source.looped)
{
//prepare again to play from begin
SourcePrepare(source);
}
else
{
source.playing = false;
source.Ended.TrySetResult(true);
}
break;
}
var finalPtr = new IntPtr(bufferPtr + (startingPacket ? source.startPktSampleIndex : 0));
var finalSize = (offset - (startingPacket ? source.startPktSampleIndex : 0) - (endingPacket ? source.endPktSampleIndex : 0)) * sizeof(short);
var bufferType = AudioLayer.BufferType.None;
if (endingPacket)
{
bufferType = source.looped ? AudioLayer.BufferType.EndOfLoop : AudioLayer.BufferType.EndOfStream;
}
else if (source.begin)
{
bufferType = AudioLayer.BufferType.BeginOfStream;
source.begin = false;
}
source.FillBuffer(finalPtr, finalSize, bufferType);
}
else
{
toRemove.Add(source);
}
}
foreach (var source in toRemove)
{
Sources.Remove(source);
}
Utilities.Sleep(20);
}
}