private void CreateObserver()
{
var fftDataLeft = new Complex[fftComplexCount];
var fftDataRight = new Complex[fftComplexCount];
observer = new StreamObserver <float>(fftSize, (int)(fftSize / moveSpeed), 2, true);
observer.Completed += multiChannelData => {
lock (@lock) {
Span <double> tempIn = stackalloc double[fftSize];
ReadSingleChannel(ref multiChannelData[0], tempIn);
fftWindow?.Apply(tempIn, tempIn);
fft.WriteRealToInput(tempIn);
fft.Execute();
fft.ReadOutput <Complex>(fftDataLeft);
ReadSingleChannel(ref multiChannelData[1], tempIn);
fftWindow?.Apply(tempIn, tempIn);
fft.WriteRealToInput(tempIn);
fft.Execute();
fft.ReadOutput <Complex>(fftDataRight);
fftCompleted?.Invoke(fftDataLeft, fftDataRight);
}
};
}
private void StreamObserver_Completed(float[] data)
{
Span <double> left = stackalloc double[fft.FFTSize];
Span <double> right = stackalloc double[fft.FFTSize];
ReadSingleChannel(data, left);
if (fftWindow != null)
{
Span <double> temp = stackalloc double[fft.FFTSize];
fftWindow.Apply(left, temp);
fft.WriteRealToInput(temp);
}
else
{
fft.WriteRealToInput(left);
}
fft.Execute();
fft.ReadOutput <Complex>(leftFFTData);
ReadSingleChannel(data.AsSpan(1), right);
if (fftWindow != null)
{
Span <double> temp = stackalloc double[fft.FFTSize];
fftWindow.Apply(right, temp);
fft.WriteRealToInput(temp);
}
else
{
fft.WriteRealToInput(right);
}
fft.Execute();
fft.ReadOutput <Complex>(rightFFTData);
FFTCompleted?.Invoke(left, right, leftFFTData, rightFFTData);
}