private void InitializeInternal()
{
Debug.WriteLine("Initialize, thread id: " + Thread.CurrentThread.ManagedThreadId);
_callbackThread = null;
var supportedFormats = new Queue<WaveFormat>(Device.SupportedFormats
.OrderBy(x => Math.Abs(x.SampleRate - _source.WaveFormat.SampleRate))
.ThenBy(x => Math.Abs(x.BitsPerSample - _source.WaveFormat.BitsPerSample))
.ThenBy(x => Math.Abs(x.Channels - _source.WaveFormat.Channels)));
var finalFormat = _source.WaveFormat;
do
{
try
{
_waveOutHandle = CreateWaveOutHandle(finalFormat);
}
catch (MmException exception)
{
if (exception.Result == MmResult.BadFormat && supportedFormats.Count > 0)
finalFormat = supportedFormats.Dequeue();
else if (exception.Result == MmResult.BadFormat && supportedFormats.Count == 0)
throw new Exception("No valid format could be found.", exception);
else
throw;
}
} while (_waveOutHandle == IntPtr.Zero);
if (finalFormat != _source.WaveFormat)
{
//the original format of the source is not supported
//we have to convert the source
//todo: test channel matrix conversion
ChannelMatrix channelMatrix = null;
if (UseChannelMixingMatrices)
{
try
{
channelMatrix = ChannelMatrix.GetMatrix(_source.WaveFormat, finalFormat);
}
catch (Exception)
{
Debug.WriteLine("No channelmatrix was found.");
}
}
DmoResampler resampler = channelMatrix != null
? new DmoChannelResampler(_source, channelMatrix, finalFormat)
: new DmoResampler(_source, finalFormat);
resampler.Quality = 60;
_source = resampler;
}
_failedBuffers.Clear();
var bufferSize = (int) WaveSource.WaveFormat.MillisecondsToBytes(_latency);
_buffers = new WaveOutBuffer[BufferCount];
for (int i = 0; i < _buffers.Length; i++)
{
_buffers[i] = new WaveOutBuffer(_waveOutHandle, bufferSize, (IntPtr) i);
}
}
private bool FireUpBuffer(WaveOutBuffer buffer)
{
if (buffer.Refill(_source))
{
Interlocked.Increment(ref _activeBuffers);
return true;
}
return false;
}
