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#ifndef _freeverb_
#define _freeverb_
// Reverb model tuning values
//
// Written by Jezar at Dreampoint, June 2000
// http://www.dreampoint.co.uk
// This code is public domain
const int numcombs = 8;
const int numallpasses = 4;
const float muted = 0;
const float fixedgain = 0.015f;
const float scalewet = 3;
const float scaledry = 2;
const float scaledamp = 0.4f;
const float scaleroom = 0.28f;
const float offsetroom = 0.7f;
const float initialroom = 0.5f;
const float initialdamp = 0.5f;
const float initialwet = 1/scalewet;
const float initialdry = 0;
const float initialwidth = 1;
const float initialmode = 0;
const float freezemode = 0.5f;
const int stereospread = 23;
const int combtuning[] = {1116, 1188, 1277, 1356, 1422, 1491, 1557, 1617};
const int allpasstuning[] = {556, 441, 341, 225};
// Macro for killing denormalled numbers
//
// Written by Jezar at Dreampoint, June 2000
// http://www.dreampoint.co.uk
// Based on IS_DENORMAL macro by Jon Watte
// This code is public domain
static inline float undenormalise(float x) {
union {
float f;
unsigned int i;
} u;
u.f = x;
if ((u.i & 0x7f800000) == 0) {
return 0.0f;
}
return x;
}
// Allpass filter declaration
//
// Written by Jezar at Dreampoint, June 2000
// http://www.dreampoint.co.uk
// This code is public domain
class allpass
{
public:
allpass();
void setbuffer(float *buf, int size);
void deletebuffer();
inline float process(float inp);
void mute();
void setfeedback(float val);
float getfeedback();
// private:
float feedback;
float *buffer;
int bufsize;
int bufidx;
};
// Big to inline - but crucial for speed
inline float allpass::process(float input)
{
float output;
float bufout;
bufout = undenormalise(buffer[bufidx]);
output = -input + bufout;
buffer[bufidx] = input + (bufout*feedback);
if (++bufidx>=bufsize) bufidx = 0;
return output;
}
// Comb filter class declaration
//
// Written by Jezar at Dreampoint, June 2000
// http://www.dreampoint.co.uk
// This code is public domain
class comb
{
public:
comb();
void setbuffer(float *buf, int size);
void deletebuffer();
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 = undenormalise(buffer[bufidx]);
filterstore = undenormalise((output*damp2) + (filterstore*damp1));
buffer[bufidx] = input + (filterstore*feedback);
if (++bufidx>=bufsize) bufidx = 0;
return output;
}
// Reverb model declaration
//
// Written by Jezar at Dreampoint, June 2000
// Modifications by Jerome Fisher, 2009
// http://www.dreampoint.co.uk
// This code is public domain
class revmodel
{
public:
revmodel(float scaletuning);
~revmodel();
void mute();
void process(const float *inputL, const float *inputR, float *outputL, float *outputR, long numsamples);
void setroomsize(float value);
float getroomsize();
void setdamp(float value);
float getdamp();
void setwet(float value);
float getwet();
void setdry(float value);
float getdry();
void setwidth(float value);
float getwidth();
void setmode(float value);
float getmode();
void setfiltval(float value);
private:
void update();
private:
float gain;
float roomsize,roomsize1;
float damp,damp1;
float wet,wet1,wet2;
float dry;
float width;
float mode;
// LPF stuff
float filtval;
float filtprev1;
float filtprev2;
// Comb filters
comb combL[numcombs];
comb combR[numcombs];
// Allpass filters
allpass allpassL[numallpasses];
allpass allpassR[numallpasses];
};
#endif//_freeverb_
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