FFT.h

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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

#ifndef _FFT_H_
#define _FFT_H_

class FFT
{
public:
    enum Exception { InvalidSize };

    FFT(unsigned int size); // may throw InvalidSize
    ~FFT();

    void forward(double *realIn, double *realOut, double *imagOut);
    void inverse(double *realIn, double *imagIn, double *realOut);

    void tune();

protected:
    unsigned int m_size;
    int *m_table;
    double *m_spare;
    void basefft(bool inverse, double *ri, double *ii, double *ro, double *io);
};

#endif

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