WaveFiltBase.h

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#ifndef _WaveFiltBase_h_
#define _WaveFiltBase_h_

#include <vapor/MyBase.h>

namespace VAPoR {

//
class WaveFiltBase {

public:
    WaveFiltBase();
    virtual ~WaveFiltBase();

    int GetLength() const { return(_filterLength); };

    const double *GetLowDecomFilCoef() const {return (_lowDecomFilCoef); };

    const double *GetLowReconFilCoef() const {return (_lowReconFilCoef); };

    const double *GetHighDecomFilCoef() const {return (_hiDecomFilCoef); };

    const double *GetHighReconFilCoef() const {return (_hiReconFilCoef); };
    
    virtual bool issymmetric() const { return(false); };

protected:
    static const int MAX_FILTER_SIZE = 32;  // space allocated to filters
    int _filterLength;  // length of filters
    double *_lowDecomFilCoef;
    double *_lowReconFilCoef;
    double *_hiDecomFilCoef;
    double *_hiReconFilCoef;

    /*-------------------------------------------
     * Flipping Operation
     *-----------------------------------------*/
    void wrev (
        const double *sigIn, double *sigOut, int sigLength
    ) const;


    /*-------------------------------------------
     * Quadrature Mirror Filtering Operation
     *-----------------------------------------*/
    void qmf_even (
        const double *sigIn, double *sigOut, int sigLength
    ) const;

    /*-------------------------------------------
     * Flipping and QMF at the same time
     *-----------------------------------------*/
    void qmf_wrev (
        const double *sigIn, double *sigOut, int sigLength
    ) const;

    /*-------------------------------------------
     * Verbatim Copying
     *-----------------------------------------*/
    void verbatim_copy (
        const double *sigIn, double *sigOut, int sigLength
    ) const;

};

}

#endif