annotate dsp/transforms/FFT.h @ 321:f1e6be2de9a5

A threshold (delta) is added in the peak picking parameters structure (PPickParams). It is used as an offset when computing the smoothed detection function. A constructor for the structure PPickParams is also added to set the parameters to 0 when a structure instance is created. Hence programmes using the peak picking parameter structure and which do not set the delta parameter (e.g. QM Vamp note onset detector) won't be affected by the modifications.

Functions modified:
- dsp/onsets/PeakPicking.cpp
- dsp/onsets/PeakPicking.h
- dsp/signalconditioning/DFProcess.cpp
- dsp/signalconditioning/DFProcess.h

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

/*
    QM DSP Library

    Centre for Digital Music, Queen Mary, University of London.
*/

#ifndef FFT_H
#define FFT_H

class FFT  
{
public:
    FFT(unsigned int nsamples);
    ~FFT();

    void process(bool inverse,
                 const double *realIn, const double *imagIn,
                 double *realOut, double *imagOut);
    
private:
    unsigned int m_n;
    void *m_private;
};

class FFTReal
{
public:
    FFTReal(unsigned int nsamples);
    ~FFTReal();

    void process(bool inverse,
                 const double *realIn,
                 double *realOut, double *imagOut);

private:
    unsigned int m_n;
    void *m_private;
};    

#endif