// Header file of module Filter_r.cpp
#include <basis.h>
#include <vmblock.h>


const
  int kLowPass=0,       //-LowPass
      kHighPass=1,      //-HiPass
      kBandPassCSG=2,   //-BandPass CSG
      kBandPassCZPG=3,  //-BandPass CZPG
      kNotch=4,         //-Notch
      kAll=5,           //-AllPass
      kPeaking=6,       //-Peaking
      kLowShelf=7,      //-LowShelf
      kHighShelf=8;     //-HiShelf

                                                               
// Butterworth all-purpose filter
  class TRbjEqFilter {
  public:
    float b0a0,b1a0,b2a0,a1a0,a2a0;
    float in1,in2,ou1,ou2;
    float fSampleRate;
    int fMaxBlockSize;
    int fFilterType;
    float fFreq,fQ,fDBGain;
    bool fQIsBandWidth;

    float *out1;
    
    void InitFilter(float SampleRate, int MaxBlockSize);
    void SetQ(float NewQ);
    void CalcFilterCoeff();
    void CalcFilterCoeffs(int pFilterType, float pFreq, float pQ, float pDBGain, bool pQIsBandWidth);
    void Process(float *Input, int sampleframes);
    float Process1(float input);
  };

// end of file filter_r.h