private void InitializeInternal()
{
_directSound = new DirectSound();
_directSound.SetCooperativeLevel(Win32.NativeMethods.GetDesktopWindow(), CooperativeLevel.Normal); //use normal as default
if (!_directSound.SupportsFormat(_source.WaveFormat))
{
if (_source.WaveFormat.WaveFormatTag == AudioEncoding.IeeeFloat) //directsound does not support ieeefloat
{
_source = _source.ToSampleSource().ToWaveSource(16);
}
WaveFormat format16Bit = (WaveFormat)_source.WaveFormat.Clone();
format16Bit.BitsPerSample = 16;
WaveFormat format8Bit = (WaveFormat)_source.WaveFormat.Clone();
format8Bit.BitsPerSample = 8;
if (_directSound.SupportsFormat(format16Bit))
{
_source = _source.ToSampleSource().ToWaveSource(16);
}
else if (_directSound.SupportsFormat(format8Bit))
{
_source = _source.ToSampleSource().ToWaveSource(8);
}
else
{
throw new NotSupportedException(
"WaveFormat of the source is not supported.");
}
if (!_directSound.SupportsFormat(_source.WaveFormat))
{
throw new NotSupportedException(
"WaveFormat of the source is not supported.");
}
}
WaveFormat waveFormat = _source.WaveFormat;
var bufferSize = (int)waveFormat.MillisecondsToBytes(_latency);
IntPtr dsBufferOut;
_directSound.CreateSoundBuffer(DefaultPrimaryBufferDescription, out dsBufferOut, null);
_primaryBuffer = new SoundBuffer(dsBufferOut);
SoundBufferDescription secondaryBufferDesc = new SoundBufferDescription()
{
BufferBytes = bufferSize * 2,
Flags = BufferFlags.ControlFrequency | BufferFlags.ControlPan |
BufferFlags.ControlVolume | BufferFlags.ControlPositionNotify |
BufferFlags.GetCurrentPosition2 | BufferFlags.GlobalFocus |
BufferFlags.StickyFocus,
Reserved = 0,
AlgorithmFor3D = Guid.Empty
};
secondaryBufferDesc.Format = SharpDX.Multimedia.WaveFormat.CreateCustomFormat(
(SharpDX.Multimedia.WaveFormatEncoding)(short) waveFormat.WaveFormatTag,
waveFormat.SampleRate,
waveFormat.Channels,
waveFormat.BytesPerSecond,
waveFormat.BlockAlign,
waveFormat.BitsPerSample
);
_directSound.CreateSoundBuffer(secondaryBufferDesc, out dsBufferOut, null);
_secondaryBuffer = new SoundBuffer(dsBufferOut);
}