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// Comb filter class declaration
//
// Written by Jezar at Dreampoint, June 2000
// http://www.dreampoint.co.uk
// This code is public domain
#ifndef _comb_
#define _comb_
#include "denormals.h"
class comb
{
public:
comb();
void setbuffer(float *buf, int size);
inline float process(float inp);
void mute();
void setdamp(float val);
float getdamp();
void setfeedback(float val);
float getfeedback();
private:
float feedback;
float filterstore;
float damp1;
float damp2;
float *buffer;
int bufsize;
int bufidx;
};
// Big to inline - but crucial for speed
inline float comb::process(float input)
{
float output;
output = buffer[bufidx];
undenormalise(output);
filterstore = (output*damp2) + (filterstore*damp1);
undenormalise(filterstore);
buffer[bufidx] = input + (filterstore*feedback);
if(++bufidx>=bufsize) bufidx = 0;
return output;
}
#endif //_comb_
//ends
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