/*
 * Copyright 2012, Gerasim Troeglazov (3dEyes**), 3dEyes@gmail.com.
 * All rights reserved.
 * Distributed under the terms of the MIT License.
 */
 
#ifndef __EQUALIZER_H__
#define __EQUALIZER_H__

#define MAX_CHANNELS 8
#define EQ_BANDS 10

class Equalizer {
public:
                        Equalizer();
                        ~Equalizer();
        void    SetFormat(int channels, float framerate);
        void    SetPreAmp(double);
        double  PreAmp(void);
        void    SetBand(int band, double value);
        double  Band(int band);
        int             BandCount(void);
        float   BandFrequency(int band);
        void    ProcessBuffer(float *buffer, int samples);
        void    CleanUp();
private:        
        void    RecalcGains(void);
        void    BandPassFilterCalcs(float *a, float *b, float f);
        
        bool    fActivated;
        int             fChannels;
        float   fRate;  
        int     fActiveBands;
        
        float   fAWeights[EQ_BANDS][2];
        float   fBWeights[EQ_BANDS][2];
        float   fWDataVector[MAX_CHANNELS][EQ_BANDS][2];
        float   fGainVector[MAX_CHANNELS][EQ_BANDS];    
        float   fFrequency[EQ_BANDS];
        
        double  fBands[EQ_BANDS];
        double  fPreAmp;        
        
};

#endif //__EQUALIZER_H__