What's wrong with this C# FFT Class: Included is my source

[jsrober]

Hi,

What's wrong with this class? Is this the right way to handle the IppsFFTSpec_C_32fc workspace? I don't think so.

using

System;

namespace

IPP

{

///

/// Summary description for FFT. /// public class FFT

{

// TODO: Add x-axis label calculation helpers // Defines // private static int PSD_SIZE = 4096; private static int PSD_SIZE = 64; private static int PSD_ORDER = 12; private static int IPP_FFT_NODIV_BY_ANY = 8; // FFT public ipp.Ipp32fc []fftIn = new ipp.Ipp32fc[PSD_SIZE]; private ipp.Ipp32fc []fftOut = new ipp.Ipp32fc[PSD_SIZE]; private byte []fftScratch = new byte[PSD_SIZE]; // Power Spectrum public float []psd = new float[PSD_SIZE]; // FFT Workspace private ipp.IppsFFTSpec_C_32fc fftw = new ipp.IppsFFTSpec_C_32fc(); // Status private ipp.IppStatus status; public FFT()

{

}

unsafe public void Init()

{

// FFT Workspace

ipp.IppsFFTSpec_C_32fc fftws = fftw;

// fftws = new ipp.IppsFFTSpec_C_32fc();

ipp.IppsFFTSpec_C_32fc *pfftws = &fftws;

status = ipp.sp.ippsFFTInitAlloc_C_32fc(&pfftws, PSD_ORDER, IPP_FFT_NODIV_BY_ANY, ipp.IppHintAlgorithm.ippAlgHintFast);

Log("ippsFFTInitAlloc_C_32fc status=" + status.ToString());

fftw = fftws;

}

// Read input from fftIn, write output to psd unsafe public void Process()

{

// FFT Workspace

ipp.IppsFFTSpec_C_32fc fftws = fftw;

// fftws = new ipp.IppsFFTSpec_C_32fc();

ipp.IppsFFTSpec_C_32fc *pfftws = &fftws;

fixed(byte *pfftScratch = fftScratch) fixed(float *ppsd = psd)

{

status = ipp.sp.ippsFFTFwd_CToC_32fc(fftIn, fftOut, pfftws, pfftScratch);

if (status != ipp.IppStatus.ippStsNoErr) Log("ippsFFTFwd_CToC_32fc status=" + status.ToString());

status = ipp.sp.ippsPowerSpectr_32fc(fftOut, ppsd, PSD_SIZE);

if (status != ipp.IppStatus.ippStsNoErr) Log("ippsPowerSpectr_32fc status=" + status.ToString());

}

for (int i=0; i < PSD_SIZE; i++)

{

psd = 10.0F * (

float)Math.Log10(psd);

}

}

private void Log(string text)

{

Console.WriteLine(text);

}

}

}