public WaveEngine(WaveFormat format, int bufferLengthMs = 1000, bool restartOnFailure = false)
{
_restartOnFailure = restartOnFailure;
// Audio engine
Exception ex = null;
try {
_engine = SA.AudioEngine.CreateOpenAL();
//_engine = SA.AudioEngine.CreateXAudio();
} catch (Exception e) {
ex = e;
}
if (_engine == null)
{
throw new WaveEngineException(ex, "Can't initialize Audio engine");
}
// Audio source
_source = _engine.CreateSource();
_format = format;
_audioFormat = new SA.AudioFormat {
BitsPerSample = format.bytesPerSample * 8,
SampleRate = format.sampleRate,
Channels = format.channels,
};
// Buffer chain
for (int i = 0; i < _audioBuffers.Length; ++i)
{
_audioBuffers[i] = _engine.CreateBuffer();
}
// Create sample buffer
_bufferLengthMs = bufferLengthMs;
_bufferSize = _format.bytesPerSample
* _format.sampleRate
* _format.channels
* _bufferLengthMs / 1000;
//!!! is it right validation?
_bufferSize = _bufferSize & ~7;
_buffer = new byte[_bufferSize];
Debug.WriteLine("WaveEngine buffer length {0} ms; size {1} bytes; format {2}",
_bufferLengthMs, _bufferSize, _format);
}
public abstract void BufferData <T>(T[] buffer, AudioFormat format) where T : unmanaged;