private void BeginOgg(bool isLooping, string volumeGroup)
{
if (string.IsNullOrEmpty(this.oggFilePath))
{
return;
}
lock (this.oggQueueLock) { }
this.oggPlaybackEnded = false;
this.oggSource = GenSourceWithVolume(volumeGroup);
var currentSource = this.oggSource;
int channels, bits_per_sample;
VorbisReader vorbis;
try
{
vorbis = new VorbisReader(this.oggFilePath);
}
catch (ArgumentException)
{
throw new InvalidOperationException("Invalid .ogg file");
}
// get the channels & sample rate
channels = vorbis.Channels;
bits_per_sample = 16;
this.oggSampleRate = vorbis.SampleRate;
var soundFormat = GetSoundFormat(channels, bits_per_sample);
// OPTIONALLY: get a TimeSpan indicating the total length of the Vorbis stream
var totalTime = vorbis.TotalTime;
// create a buffer for reading samples
var valuesPerBuffer = (int)(channels * oggSampleRate * OggBufferSize); // 1s/5 = 200ms
var readBuffer = new float[valuesPerBuffer];
// get the initial position (obviously the start)
var position = TimeSpan.Zero;
this.oggTotalSamples = vorbis.TotalSamples;
var sampleEnd = isLooping ? this.oggLoopEnd : this.oggTotalSamples;
if (this.oggProgress < 0 || this.oggProgress >= sampleEnd)
{
this.OggSeek(0);
}
this.UpdateOggProgress(this.oggPausePosition);
vorbis.SeekTo(this.oggPausePosition);
var buffersInitialized = false;
var buffers = new List <int>();
var playbackStopDetected = false;
this.WaitOnLock(this.oggQueueLock, () =>
{
for (int i = 0; i < OggBufferCount; i++)
{
var currentBuffer = AL.GenBuffer();
QueueBuffer(currentSource, currentBuffer, vorbis, soundFormat, oggSampleRate, valuesPerBuffer, sampleEnd);
buffers.Add(currentBuffer);
}
var allBuffersProcessed = false;
while (!buffersInitialized || (!playbackStopDetected && !this.oggPlaybackEnded))
{
buffersInitialized = true;
AL.GetSource(currentSource, ALGetSourcei.BuffersQueued, out int buffersQueued);
AL.GetSource(currentSource, ALGetSourcei.BuffersProcessed, out int buffersProcessed);
var newUnqueuedSize = 0;
for (int i = 0; i < buffersProcessed; i++)
{
var currentBuffer = buffers.First();
buffers.Remove(currentBuffer);
AL.GetBuffer(currentBuffer, ALGetBufferi.Size, out int currentBufferSize);
newUnqueuedSize += currentBufferSize;
AL.SourceUnqueueBuffers(currentSource, 1, new[] { currentBuffer });
QueueBuffer(currentSource, currentBuffer, vorbis, soundFormat, oggSampleRate, valuesPerBuffer, sampleEnd);
buffers.Add(currentBuffer);
}
allBuffersProcessed = vorbis.SamplePosition >= this.oggTotalSamples && (!isLooping);
if (allBuffersProcessed && buffersProcessed != 0)
{
var unqueuedBuffers = new int[buffersProcessed];
AL.SourceUnqueueBuffers(currentSource, buffersProcessed, unqueuedBuffers);
foreach (var currentBuffer in unqueuedBuffers)
{
AL.GetBuffer(currentBuffer, ALGetBufferi.Size, out int currentBufferSize);
newUnqueuedSize += currentBufferSize;
}
}
var newProgress = newUnqueuedSize / (channels * (bits_per_sample / 8));
var adjustedProgress = this.oggProgress + newProgress;
if (AL.GetSourceState(currentSource) == ALSourceState.Playing)
{
this.UpdateOggProgress(adjustedProgress);
}
else
{
AL.SourcePlay(currentSource);
}
if (isLooping)
{
var realLoopEnd = Math.Min(this.oggLoopEnd, this.oggTotalSamples);
if (vorbis.SamplePosition >= realLoopEnd)
{
vorbis.SeekTo(this.oggLoopStart);
}
if (this.oggProgress >= realLoopEnd)
{
this.UpdateOggProgress(this.oggLoopStart + (this.oggProgress % realLoopEnd));
}
}
else
{
var realLoopEnd = Math.Min(this.oggLoopEnd, this.oggTotalSamples);
if (vorbis.SamplePosition >= realLoopEnd)
{
this.oggPlaybackEnded = true;
}
}
}
vorbis.Dispose();
});
while (!buffersInitialized)
{
Thread.Sleep(10);
}
this.OggPlayback?.Invoke(this, new OggPlaybackEventArgs {
StateChange = ALSourceState.Playing
});
this.Play(currentSource, () =>
{
playbackStopDetected = true;
this.WaitOnLock(this.oggQueueLock, () =>
{
foreach (var buf in buffers)
{
AL.DeleteBuffer(buf);
}
this.OggPlayback?.Invoke(this, new OggPlaybackEventArgs
{
StateChange = ALSourceState.Stopped
});
this.oggSource = -1;
});
},
true);
}
