view dsp/signalconditioning/FiltFilt.h @ 30:a251fb0de594

* Make MFCC able to accept already-FFT'd input, and simplify API a bit
* Add log power value to MFCC, restore windowing, and avoid some heap allocs
* In HMM, bail out of iteration if loglik hits NaN

/* -*- 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.
    This file copyright 2005-2006 Christian Landone.
    All rights reserved.
*/

#ifndef FILTFILT_H
#define FILTFILT_H

#include "Filter.h"

struct FiltFiltConfig{
    unsigned int ord;
    double* ACoeffs;
    double* BCoeffs;
};

class FiltFilt  
{
public:
    FiltFilt( FiltFiltConfig Config );
    virtual ~FiltFilt();

    void reset();
    void process( double* src, double* dst, unsigned int length );

private:
    void initialise( FiltFiltConfig Config );
    void deInitialise();

    unsigned int m_ord;

    Filter* m_filter;

    double* m_filtScratchIn;
    double* m_filtScratchOut;

    FilterConfig m_filterConfig;
};

#endif