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);
}
};
}
public SharedStreamObserver(IWaveIn capture, int fftSize, double moveSpeed, DSP.Window fftWindow)
{
this.capture = capture;
this.fftWindow = fftWindow;
fft = FFT.CreateFFT(fftSize);
leftFFTData = new Complex[fft.FFTComplexCount];
rightFFTData = new Complex[fft.FFTComplexCount];
streamObserver = new StreamObserver <float>(fftSize, (int)(fftSize / moveSpeed), 2, true);
streamObserver.Completed += StreamObserver_Completed;
capture.DataAvailable += Capture_DataAvailable;
}