| private alSourcePlay ( uint sourceId ) : void | ||
| sourceId | uint | |
| return | void | |
/// <summary>
/// Resumes the playback.
/// </summary>
public void Resume()
{
lock (_locker)
{
Owner.Context.MakeCurrent();
OpenAL.alSourcePlay(_source.SourceId);
PlaybackState = PlaybackState.Playing;
RaisePlaybackChanged();
}
}
/// <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();
}
}
