/// <summary>
/// Disposes the object.
/// </summary>
/// <param name="disposing">The disposing state.</param>
protected virtual void Dispose(bool disposing)
{
_beginDispose = true;
if (PlaybackState != PlaybackState.Stopped)
{
lock (_locker)
{
OpenAL.alSourceStop(_source.SourceId);
PlaybackState = PlaybackState.Stopped;
RaisePlaybackChanged();
}
}
if (_source.SourceId != 0)
{
lock (_locker)
{
var queuedBuffers = new uint[3];
OpenAL.alSourceUnqueueBuffers(_source.SourceId, 3, queuedBuffers);
OpenAL.alDeleteBuffers(3, queuedBuffers);
}
Owner.SourcePool.FreeSource(_source);
Owner.DestroyAudioBuffer(this);
}
if (disposing)
{
}
}
/// <summary>
/// Resumes the playback.
/// </summary>
public void Resume()
{
lock (_locker)
{
Owner.Context.MakeCurrent();
OpenAL.alSourcePlay(_source.SourceId);
PlaybackState = PlaybackState.Playing;
RaisePlaybackChanged();
}
}
/// <summary>
/// Stops the playback.
/// </summary>
public void Stop()
{
lock (_locker)
{
Owner.Context.MakeCurrent();
OpenAL.alSourceStop(_source.SourceId);
PlaybackState = PlaybackState.Stopped;
RaisePlaybackChanged();
}
}
/// <summary>
/// Requests a Source from the source pool.
/// </summary>
/// <returns>OpenALSource.</returns>
public OpenALSource RequestSource()
{
_context.MakeCurrent();
var sources = new uint[1];
OpenAL.alGenSources(1, sources);
var source = new OpenALSource(sources[0]);
_sources.Add(source);
return(source);
}
/// <summary>
/// Initializes the device.
/// </summary>
private void InitializeDevice()
{
if (_deviceHandle != IntPtr.Zero)
{
return;
}
_disposing = false;
_deviceHandle = OpenAL.alcOpenDevice(Name);
Context = OpenALContext.CreateContext(_deviceHandle);
SourcePool = new OpenALSourcePool(Context);
}
/// <summary>
/// Frees a source.
/// </summary>
/// <param name="source">The OpenALSource.</param>
public void FreeSource(OpenALSource source)
{
if (_sources.Contains(source))
{
_sources.Remove(source);
if (source.SourceId != 0)
{
_context.MakeCurrent();
var sources = new uint[1];
sources[0] = source.SourceId;
OpenAL.alDeleteSources(1, sources);
source.Reset();
}
}
}
/// <summary>
/// Disposes the object.
/// </summary>
/// <param name="disposing">The disposing state.</param>
public virtual void Dispose(bool disposing)
{
if (disposing)
{
SourcePool.Dispose();
}
if (_deviceHandle == IntPtr.Zero)
{
return;
}
_disposing = true;
Context.Destroy();
OpenAL.alcCloseDevice(_deviceHandle);
_deviceHandle = IntPtr.Zero;
Context = null;
}
/// <summary>
/// Initializes the OpenALAudioBuffer class.
/// </summary>
/// <param name="audioData">The Buffer.</param>
/// <param name="format">The WaveFormat.</param>
/// <param name="latency">The Latency.</param>
public void Initialize(byte[] audioData, WaveFormat format, int latency)
{
lock (_locker)
{
Owner.Context.MakeCurrent();
OpenAL.alListener3f(SourceProperty.Position, 0, 0, 1);
OpenAL.alListener3f(SourceProperty.Velocity, 0, 0, 0);
OpenAL.alListenerfv(SourceProperty.Orientation, new float[] { 0, 0, 1, 0, 1, 0 });
OpenAL.alSourcef(_source.SourceId, SourceProperty.Gain, _audioMixer.Volume);
OpenAL.alSourcefv(_source.SourceId, SourceProperty.Position, new[] { _audioMixer.Pan, 0, 0 });
}
SampleRate = (uint)format.SamplesPerSec;
Latency = latency;
_audioData = audioData;
WaveFormat = format;
Length = audioData.Length / format.AvgBytesPerSec * 1000;
_bufferSize = format.AvgBytesPerSec / 1000 * latency;
_processedBytes = 0;
}
/// <summary>
/// Disposes the object.
/// </summary>
/// <param name="disposing">The disposing state.</param>
protected virtual void Dispose(bool disposing)
{
_context.MakeCurrent();
foreach (var source in _sources)
{
if (source != null && source.SourceId != 0)
{
var sources = new uint[1];
sources[0] = source.SourceId;
OpenAL.alDeleteSources(1, sources);
source.Reset();
}
#if DEBUG
_logger.Info("Source automatically disposed.");
#endif
}
if (disposing)
{
_sources.Clear();
}
}
/// <summary>
/// Fills the buffer.
/// </summary>
/// <param name="target">The OpenALDataBuffer.</param>
private void FillBuffer(OpenALDataBuffer target)
{
lock (_locker)
{
var unqueueBuffer = new uint[1];
OpenAL.alSourceUnqueueBuffers(_source.SourceId, 1, unqueueBuffer);
var data = new byte[_bufferSize];
var datalength = _bufferSize;
if (_bufferSize > _audioData.Length - _processedBytes)
{
Buffer.BlockCopy(_audioData, _processedBytes, data, 0, _audioData.Length - _processedBytes);
datalength = _audioData.Length - _processedBytes;
_processedBytes += datalength;
}
else
{
Buffer.BlockCopy(_audioData, _processedBytes, data, 0, _bufferSize);
_processedBytes += _bufferSize;
}
_audioMixer.ApplyEffects(data, WaveFormat);
OpenAL.alBufferData(target.Id, Format, data, datalength, SampleRate);
OpenAL.alSourceQueueBuffers(_source.SourceId, 1, new[] { target.Id });
}
}
/// <summary>
/// Starts the playback.
/// </summary>
private void StartPlayback()
{
if (PlaybackState == PlaybackState.Stopped)
{
PlaybackState = PlaybackState.Playing;
RaisePlaybackChanged();
_processedBytes = 0;
_playbackThread = new Task(() =>
{
OpenALDataBuffer buffer1;
OpenALDataBuffer buffer2;
OpenALDataBuffer buffer3;
lock (_locker)
{
Owner.Context.MakeCurrent();
buffer1 = OpenALDataBuffer.CreateBuffer();
buffer2 = OpenALDataBuffer.CreateBuffer();
buffer3 = OpenALDataBuffer.CreateBuffer();
}
buffer1.Next = buffer2;
buffer2.Next = buffer3;
buffer3.Next = buffer1;
OpenALDataBuffer currentBuffer = buffer1;
FillBuffer(currentBuffer);
currentBuffer = currentBuffer.Next;
FillBuffer(currentBuffer);
currentBuffer = currentBuffer.Next;
FillBuffer(currentBuffer);
lock (_locker)
{
OpenAL.alSourcePlay(_source.SourceId);
}
while (_processedBytes < _audioData.Length)
{
if (_beginDispose)
{
return;
}
switch (PlaybackState)
{
case PlaybackState.Paused:
_playbackThread.Wait(Latency);
continue;
case PlaybackState.Stopped:
return;
}
int finishedBuffers;
lock (_locker)
{
OpenAL.alGetSourcei(_source.SourceId, SourceProperty.AllBuffersProcessed,
out finishedBuffers);
}
if (finishedBuffers == 0)
{
_playbackThread.Wait(Latency);
}
while (finishedBuffers > 0)
{
finishedBuffers--;
currentBuffer = currentBuffer.Next;
FillBuffer(currentBuffer);
}
Position = _processedBytes / WaveFormat.AvgBytesPerSec * 1000;
//if the audio stops where it should not, restart playback
lock (_locker)
{
int sourceState;
OpenAL.alGetSourcei(_source.SourceId, SourceProperty.SourceState, out sourceState);
if ((SourceState)sourceState == SourceState.Stopped)
{
OpenAL.alSourcePlay(_source.SourceId);
}
}
}
PlaybackState = PlaybackState.Stopped;
var queuedBuffers = new uint[3];
RaisePlaybackChanged();
lock (_locker)
{
OpenAL.alSourceUnqueueBuffers(_source.SourceId, 3, queuedBuffers);
OpenAL.alDeleteBuffers(3, queuedBuffers);
}
});
_playbackThread.Start();
}
}
/// <summary>
/// Creates a new OpenALContext on the specified OpenALDevice.
/// </summary>
/// <param name="openALDeviceHandle">The OpenALDevice.</param>
public static OpenALContext CreateContext(IntPtr openALDeviceHandle)
{
return(new OpenALContext(OpenAL.alcCreateContext(openALDeviceHandle, IntPtr.Zero)));
}
/// <summary>
/// Destroys the Context.
/// </summary>
public void Destroy()
{
OpenAL.alcDestroyContext(_handle);
}
/// <summary>
/// Makes the context the current Context.
/// </summary>
public void MakeCurrent()
{
OpenAL.alcMakeContextCurrent(_handle);
}