/// <summary>
/// Get the number of processed buffers.
/// </summary>
public int ProcessedBuffers()
{
CheckDisposed();
Context.MakeCurrent();
AL10.alGetSourcei(Name, AL10.AL_BUFFERS_PROCESSED, out var processed);
AlHelper.AlCheckError("Failed to get number of processed buffers.");
return(processed);
}
protected void StopSource()
{
AL10.alGetSourcei(Source, AL10.AL_SOURCE_STATE, out var state);
if (state == AL10.AL_PLAYING || state == AL10.AL_PAUSED)
{
AL10.alSourceStop(Source);
}
}
internal bool Update()
{
if (State == SoundState.Stopped)
{
/* If we've stopped, remove ourselves from the list.
* Do NOT do anything else, Play/Stop/Dispose do this!
* -flibit
*/
return(false);
}
// Get the processed buffers.
int finishedBuffers;
AL10.alGetSourcei(
INTERNAL_alSource,
AL10.AL_BUFFERS_PROCESSED,
out finishedBuffers
);
if (finishedBuffers == 0)
{
// Nothing to do... yet.
return(true);
}
uint[] bufs = new uint[finishedBuffers];
AL10.alSourceUnqueueBuffers(
INTERNAL_alSource,
(IntPtr)finishedBuffers,
bufs
);
PendingBufferCount -= finishedBuffers;
if (BufferNeeded != null)
{
// PendingBufferCount changed during playback, trigger now!
BufferNeeded(this, null);
}
// Error check our queuedBuffers list.
for (int i = 0; i < finishedBuffers; i += 1)
{
uint newBuf = queuedBuffers.Dequeue();
if (newBuf != bufs[i])
{
throw new Exception("Buffer desync!");
}
availableBuffers.Enqueue(newBuf);
}
// Notify the application that we need moar buffers!
if (PendingBufferCount <= 2 && BufferNeeded != null)
{
BufferNeeded(this, null);
}
return(true);
}
public int CheckProcessedBuffers(IALSource source)
{
int result;
AL10.alGetSourcei(
(source as OpenALSource).Handle,
AL10.AL_BUFFERS_PROCESSED,
out result
);
return(result);
}
public void StopAllSounds()
{
foreach (var key in sourcePool.Keys)
{
int state;
AL10.alGetSourcei(key, AL10.AL_SOURCE_STATE, out state);
if (state == AL10.AL_PLAYING || state == AL10.AL_PAUSED)
{
AL10.alSourceStop(key);
}
}
}
private void alSourcePlay()
{
int state = AL10.alGetSourcei(alSource, AL10.AL_SOURCE_STATE);
if (state != AL10.AL_PLAYING)
{
if (minimumNumberBuffers <= 0 || WaitingBuffers >= minimumNumberBuffers)
{
AL10.alSourcePlay(alSource);
}
}
}
public int CheckProcessedBuffers(IALSource source)
{
int result;
AL10.alGetSourcei(
(source as OpenALSource).Handle,
AL10.AL_BUFFERS_PROCESSED,
out result
);
#if VERBOSE_AL_DEBUGGING
CheckALError();
#endif
return(result);
}
public void SetSoundVolume(float volume, ISound music, ISound video)
{
var sounds = sourcePool.Keys.Where(key =>
{
AL10.alGetSourcei(key, AL10.AL_SOURCE_STATE, out var state);
return((state == AL10.AL_PLAYING || state == AL10.AL_PAUSED) &&
(music == null || key != ((OpenAlSound)music).Source) &&
(video == null || key != ((OpenAlSound)video).Source));
});
foreach (var s in sounds)
{
AL10.alSourcef(s, AL10.AL_GAIN, volume);
}
}
public void StopSound(ISound sound)
{
if (sound == null)
{
return;
}
var key = ((OpenAlSound)sound).Source;
int state;
AL10.alGetSourcei(key, AL10.AL_SOURCE_STATE, out state);
if (state == AL10.AL_PLAYING || state == AL10.AL_PAUSED)
{
AL10.alSourceStop(key);
}
}
public void SetAllSoundsPaused(bool paused)
{
foreach (var key in sourcePool.Keys)
{
int state;
AL10.alGetSourcei(key, AL10.AL_SOURCE_STATE, out state);
if (state == AL10.AL_PLAYING && paused)
{
AL10.alSourcePause(key);
}
else if (state == AL10.AL_PAUSED && !paused)
{
AL10.alSourcePlay(key);
}
}
}
public virtual void checkFreeBuffers(int alSource)
{
while (true)
{
int processedBuffers = AL10.alGetSourcei(alSource, AL10.AL_BUFFERS_PROCESSED);
if (processedBuffers <= 0)
{
break;
}
int alBuffer = AL10.alSourceUnqueueBuffers(alSource);
//if (log.DebugEnabled)
{
Console.WriteLine(string.Format("free buffer {0:D}", alBuffer));
}
freeBuffers.Push(alBuffer);
}
}
public SoundState GetSourceState(IALSource source)
{
int state;
AL10.alGetSourcei(
(source as OpenALSource).Handle,
AL10.AL_SOURCE_STATE,
out state
);
if (state == AL10.AL_PLAYING)
{
return(SoundState.Playing);
}
else if (state == AL10.AL_PAUSED)
{
return(SoundState.Paused);
}
return(SoundState.Stopped);
}
public void PauseSound(ISound sound, bool paused)
{
if (sound == null)
{
return;
}
var key = ((OpenAlSound)sound).Source;
int state;
AL10.alGetSourcei(key, AL10.AL_SOURCE_STATE, out state);
if (state == AL10.AL_PLAYING && paused)
{
AL10.alSourcePause(key);
}
else if (state == AL10.AL_PAUSED && !paused)
{
AL10.alSourcePlay(key);
}
}
bool TryGetSourceFromPool(out uint source)
{
foreach (var kvp in sourcePool)
{
if (!kvp.Value.IsActive)
{
sourcePool[kvp.Key].IsActive = true;
source = kvp.Key;
return(true);
}
}
var freeSources = new List <uint>();
foreach (var key in sourcePool.Keys)
{
int state;
AL10.alGetSourcei(key, AL10.AL_SOURCE_STATE, out state);
if (state != AL10.AL_PLAYING && state != AL10.AL_PAUSED)
{
freeSources.Add(key);
}
}
if (freeSources.Count == 0)
{
source = 0;
return(false);
}
foreach (var i in freeSources)
{
sourcePool[i].IsActive = false;
}
sourcePool[freeSources[0]].IsActive = true;
source = freeSources[0];
return(true);
}
public SoundState GetSourceState(IALSource source)
{
int state;
AL10.alGetSourcei(
(source as OpenALSource).Handle,
AL10.AL_SOURCE_STATE,
out state
);
#if VERBOSE_AL_DEBUGGING
CheckALError();
#endif
if (state == AL10.AL_PLAYING)
{
return(SoundState.Playing);
}
else if (state == AL10.AL_PAUSED)
{
return(SoundState.Paused);
}
return(SoundState.Stopped);
}
void PauseSound(uint source, bool paused)
{
AL10.alGetSourcei(source, AL10.AL_SOURCE_STATE, out var state);
if (paused)
{
if (state == AL10.AL_PLAYING)
{
AL10.alSourcePause(source);
}
else if (state == AL10.AL_INITIAL)
{
// If a sound hasn't started yet,
// we indicate it should not play be transitioning it to the stopped state.
AL10.alSourcePlay(source);
AL10.alSourceStop(source);
}
}
else if (!paused && state != AL10.AL_PLAYING)
{
AL10.alSourcePlay(source);
}
}
public void GetBufferData(
IALSource source,
IALBuffer[] buffer,
IntPtr samples,
int samplesLen,
AudioChannels channels
)
{
int copySize1 = samplesLen / (int)channels;
int copySize2 = 0;
// Where are we now?
int offset;
AL10.alGetSourcei(
(source as OpenALSource).Handle,
AL11.AL_SAMPLE_OFFSET,
out offset
);
// Is that longer than what the active buffer has left...?
uint buf = (buffer[0] as OpenALBuffer).Handle;
int len;
AL10.alGetBufferi(
buf,
AL10.AL_SIZE,
out len
);
len /= 2; // FIXME: Assuming 16-bit!
len /= (int)channels;
if (offset > len)
{
copySize2 = copySize1;
copySize1 = 0;
offset -= len;
}
else if (offset + copySize1 > len)
{
copySize2 = copySize1 - (len - offset);
copySize1 = (len - offset);
}
// Copy!
if (copySize1 > 0)
{
ALEXT.alGetBufferSamplesSOFT(
buf,
offset,
copySize1,
channels == AudioChannels.Stereo ?
ALEXT.AL_STEREO_SOFT :
ALEXT.AL_MONO_SOFT,
ALEXT.AL_FLOAT_SOFT,
samples
);
offset = 0;
}
if (buffer.Length > 1 && copySize2 > 0)
{
ALEXT.alGetBufferSamplesSOFT(
(buffer[1] as OpenALBuffer).Handle,
0,
copySize2,
channels == AudioChannels.Stereo ?
ALEXT.AL_STEREO_SOFT :
ALEXT.AL_MONO_SOFT,
ALEXT.AL_FLOAT_SOFT,
samples + (copySize1 * (int)channels)
);
}
}
public OpenAlAsyncLoadSound(uint source, bool looping, bool relative, WPos pos, float volume, int channels, int sampleBits, int sampleRate, Stream stream)
: base(source, looping, relative, pos, volume, sampleRate)
{
// Load a silent buffer into the source. Without this,
// attempting to change the state (i.e. play/pause) the source fails on some systems.
var silentSource = new OpenAlSoundSource(SilentData, SilentData.Length, channels, sampleBits, sampleRate);
AL10.alSourcei(source, AL10.AL_BUFFER, (int)silentSource.Buffer);
playTask = Task.Run(async() =>
{
MemoryStream memoryStream;
using (stream)
{
try
{
memoryStream = new MemoryStream((int)stream.Length);
}
catch (NotSupportedException)
{
// Fallback for stream types that don't support Length.
memoryStream = new MemoryStream();
}
try
{
await stream.CopyToAsync(memoryStream, 81920, cts.Token);
}
catch (TaskCanceledException)
{
// Sound was stopped early, cleanup the unused buffer and exit.
AL10.alSourceStop(source);
AL10.alSourcei(source, AL10.AL_BUFFER, 0);
silentSource.Dispose();
return;
}
}
var data = memoryStream.GetBuffer();
var dataLength = (int)memoryStream.Length;
var bytesPerSample = sampleBits / 8f;
var lengthInSecs = dataLength / (channels * bytesPerSample * sampleRate);
using (var soundSource = new OpenAlSoundSource(data, dataLength, channels, sampleBits, sampleRate))
{
// Need to stop the source, before attaching the real input and deleting the silent one.
AL10.alSourceStop(source);
AL10.alSourcei(source, AL10.AL_BUFFER, (int)soundSource.Buffer);
silentSource.Dispose();
lock (cts)
{
if (!cts.IsCancellationRequested)
{
// TODO: A race condition can happen between the state check and playing/rewinding if a
// user pauses/resumes at the right moment. The window of opportunity is small and the
// consequences are minor, so for now we'll ignore it.
int state;
AL10.alGetSourcei(Source, AL10.AL_SOURCE_STATE, out state);
if (state != AL10.AL_STOPPED)
{
AL10.alSourcePlay(source);
}
else
{
// A stopped sound indicates it was paused before we finishing loaded.
// We don't want to start playing it right away.
// We rewind the source so when it is started, it plays from the beginning.
AL10.alSourceRewind(source);
}
}
}
while (!cts.IsCancellationRequested)
{
// Need to check seek before state. Otherwise, the music can stop after our state check at
// which point the seek will be zero, meaning we'll wait the full track length before seeing it
// has stopped.
var currentSeek = SeekPosition;
int state;
AL10.alGetSourcei(Source, AL10.AL_SOURCE_STATE, out state);
if (state == AL10.AL_STOPPED)
{
break;
}
try
{
// Wait until the track is due to complete, and at most 60 times a second to prevent a
// busy-wait.
var delaySecs = Math.Max(lengthInSecs - currentSeek, 1 / 60f);
await Task.Delay(TimeSpan.FromSeconds(delaySecs), cts.Token);
}
catch (TaskCanceledException)
{
// Sound was stopped early, allow normal cleanup to occur.
}
}
AL10.alSourcei(Source, AL10.AL_BUFFER, 0);
}
});
}
