firfilter.h

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/* This software and supporting documentation are distributed by
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 * This software is governed by the CeCILL-B license under
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#ifndef AIMS_SIGNALFILTER_FIRFILTER_H
#define AIMS_SIGNALFILTER_FIRFILTER_H

#include <aims/config/aimsalgo_config.h>
#include <aims/def/general.h>

template <class T> class AimsData;


AIMSDATA_API enum AimsDirectionAxis
{
  AIMS_X_DIRECTION,
  AIMS_Y_DIRECTION,
  AIMS_Z_DIRECTION,
  AIMS_T_DIRECTION
};


enum AimsFirFilterType
{
  AIMS_FIR_LOWPASS,
  AIMS_FIR_HIGHPASS,
  AIMS_FIR_BANDPASS,
  AIMS_FIR_BANDSTOP
};


class AIMSALGO_API AimsFIRFilter
{ protected:
    float _fSampling;
    float _fCut;
    float _fLow;
    float _fHigh;
    float _deltaF;
    float _deltaP;
    float _deltaS;
    float _beta;
    int _type;
    int _nCoef;
    AimsData<float> *_impulseResponse;

    void numberOfFIRFilterCoef();
    AimsData<float> kaiserWindow();
    AimsData<float> idealImpulseResponse();
    AimsData<float> impulseResponse();
    void initialize();

  public:
    AimsFIRFilter(float fs, float fc, float deltaf, float deltap, float deltas,
                  int type);
    AimsFIRFilter(float fs, float fl, float fh, float deltaf, float deltap,
                  float deltas, int type);
    virtual ~AimsFIRFilter();    

    float fSampling() const;
    float fCut()      const;
    float fLow()      const;
    float fHigh()     const;
    float deltaF()    const;
    float deltaP()    const;
    float deltaS()    const;
    int  type()      const;
  
    AimsData<float> 
    process(const AimsData<float> &data,
            AimsDirectionAxis dir = AIMS_X_DIRECTION);
};


#endif