public OggStream(Stream stream, Action finishedAction = null, int bufferCount = DefaultBufferCount)
{
FinishedAction = finishedAction;
BufferCount = bufferCount;
alBufferIds = AL.GenBuffers(bufferCount);
alSourceId = AL.GenSource();
if (ALHelper.XRam.IsInitialized)
{
ALHelper.XRam.SetBufferMode(BufferCount, ref alBufferIds[0], XRamExtension.XRamStorage.Hardware);
ALHelper.Check();
}
Volume = 1;
if (ALHelper.Efx.IsInitialized)
{
alFilterId = ALHelper.Efx.GenFilter();
ALHelper.Efx.Filter(alFilterId, EfxFilteri.FilterType, (int)EfxFilterType.Lowpass);
ALHelper.Efx.Filter(alFilterId, EfxFilterf.LowpassGain, 1);
LowPassHFGain = 1;
}
underlyingStream = stream;
}
void Empty()
{
int queued;
AL.GetSource(alSourceId, ALGetSourcei.BuffersQueued, out queued);
if (queued > 0)
{
try
{
AL.SourceUnqueueBuffers(alSourceId, queued);
ALHelper.Check();
}
catch (InvalidOperationException)
{
// This is a bug in the OpenAL implementation
// Salvage what we can
int processed;
AL.GetSource(alSourceId, ALGetSourcei.BuffersProcessed, out processed);
var salvaged = new int[processed];
if (processed > 0)
{
AL.SourceUnqueueBuffers(alSourceId, processed, salvaged);
ALHelper.Check();
}
// Try turning it off again?
AL.SourceStop(alSourceId);
ALHelper.Check();
Empty();
}
}
}
public void Dispose()
{
var state = AL.GetSourceState(alSourceId);
if (state == ALSourceState.Playing || state == ALSourceState.Paused)
StopPlayback();
lock (prepareMutex)
{
OggStreamer.Instance.RemoveStream(this);
if (state != ALSourceState.Initial)
Empty();
Close();
underlyingStream.Dispose();
}
AL.DeleteSource(alSourceId);
AL.DeleteBuffers(alBufferIds);
if (ALHelper.Efx.IsInitialized)
ALHelper.Efx.DeleteFilter(alFilterId);
ALHelper.Check();
}
public void Resume()
{
if (AL.GetSourceState(alSourceId) != ALSourceState.Paused)
return;
OggStreamer.Instance.AddStream(this);
AL.SourcePlay(alSourceId);
ALHelper.Check();
}
public void Pause()
{
if (AL.GetSourceState(alSourceId) != ALSourceState.Playing)
return;
OggStreamer.Instance.RemoveStream(this);
AL.SourcePause(alSourceId);
ALHelper.Check();
}
public bool FillBuffer(OggStream stream, int bufferId)
{
int readSamples;
lock (readMutex)
{
readSamples = stream.Reader.ReadSamples(readSampleBuffer, 0, BufferSize);
CastBuffer(readSampleBuffer, castBuffer, readSamples);
}
AL.BufferData(bufferId, stream.Reader.Channels == 1 ? ALFormat.Mono16 : ALFormat.Stereo16, castBuffer,
readSamples * sizeof (short), stream.Reader.SampleRate);
ALHelper.Check();
return readSamples != BufferSize;
}
internal void Open(bool precache = false)
{
underlyingStream.Seek(0, SeekOrigin.Begin);
Reader = new VorbisReader(underlyingStream, false);
if (precache)
{
// Fill first buffer synchronously
OggStreamer.Instance.FillBuffer(this, alBufferIds[0]);
AL.SourceQueueBuffer(alSourceId, alBufferIds[0]);
ALHelper.Check();
// Schedule the others asynchronously
OggStreamer.Instance.AddStream(this);
}
Ready = true;
}
public void Play()
{
var state = AL.GetSourceState(alSourceId);
switch (state)
{
case ALSourceState.Playing: return;
case ALSourceState.Paused:
Resume();
return;
}
Prepare();
AL.SourcePlay(alSourceId);
ALHelper.Check();
Preparing = false;
OggStreamer.Instance.AddStream(this);
}
void EnsureBuffersFilled()
{
while (!cancelled)
{
Thread.Sleep((int) (1000 / ((UpdateRate <= 0) ? 1 : UpdateRate)));
if (cancelled) break;
threadLocalStreams.Clear();
lock (iterationMutex) threadLocalStreams.AddRange(streams);
foreach (var stream in threadLocalStreams)
{
lock (stream.prepareMutex)
{
lock (iterationMutex)
if (!streams.Contains(stream))
continue;
bool finished = false;
int queued;
AL.GetSource(stream.alSourceId, ALGetSourcei.BuffersQueued, out queued);
ALHelper.Check();
int processed;
AL.GetSource(stream.alSourceId, ALGetSourcei.BuffersProcessed, out processed);
ALHelper.Check();
if (processed == 0 && queued == stream.BufferCount) continue;
int[] tempBuffers;
if (processed > 0)
tempBuffers = AL.SourceUnqueueBuffers(stream.alSourceId, processed);
else
tempBuffers = stream.alBufferIds.Skip(queued).ToArray();
for (int i = 0; i < tempBuffers.Length; i++)
{
finished |= FillBuffer(stream, tempBuffers[i]);
if (finished)
{
if (stream.IsLooped)
{
stream.Close();
stream.Open();
}
else
{
streams.Remove(stream);
i = tempBuffers.Length;
}
if (stream.FinishedAction != null)
stream.FinishedAction.Invoke();
}
}
if (!finished)
{
AL.SourceQueueBuffers(stream.alSourceId, tempBuffers.Length, tempBuffers);
ALHelper.Check();
}
else if (!stream.IsLooped)
continue;
}
lock (stream.stopMutex)
{
if (stream.Preparing) continue;
lock (iterationMutex)
if (!streams.Contains(stream))
continue;
var state = AL.GetSourceState(stream.alSourceId);
if (state == ALSourceState.Stopped)
{
AL.SourcePlay(stream.alSourceId);
ALHelper.Check();
}
}
}
}
}
void StopPlayback()
{
AL.SourceStop(alSourceId);
ALHelper.Check();
}