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// Reverb model implementation
//
// Written by Jezar at Dreampoint, June 2000
// http://www.dreampoint.co.uk
// This code is public domain
#include <stdio.h>
#include "revmodel.h"
//---------------------------------------------------------
// Revmodel
//---------------------------------------------------------
Revmodel::Revmodel()
{
// Tie the components to their buffers
combL[0].setbuffer(bufcombL1,combtuningL1);
combR[0].setbuffer(bufcombR1,combtuningR1);
combL[1].setbuffer(bufcombL2,combtuningL2);
combR[1].setbuffer(bufcombR2,combtuningR2);
combL[2].setbuffer(bufcombL3,combtuningL3);
combR[2].setbuffer(bufcombR3,combtuningR3);
combL[3].setbuffer(bufcombL4,combtuningL4);
combR[3].setbuffer(bufcombR4,combtuningR4);
combL[4].setbuffer(bufcombL5,combtuningL5);
combR[4].setbuffer(bufcombR5,combtuningR5);
combL[5].setbuffer(bufcombL6,combtuningL6);
combR[5].setbuffer(bufcombR6,combtuningR6);
combL[6].setbuffer(bufcombL7,combtuningL7);
combR[6].setbuffer(bufcombR7,combtuningR7);
combL[7].setbuffer(bufcombL8,combtuningL8);
combR[7].setbuffer(bufcombR8,combtuningR8);
allpassL[0].setbuffer(bufallpassL1,allpasstuningL1);
allpassR[0].setbuffer(bufallpassR1,allpasstuningR1);
allpassL[1].setbuffer(bufallpassL2,allpasstuningL2);
allpassR[1].setbuffer(bufallpassR2,allpasstuningR2);
allpassL[2].setbuffer(bufallpassL3,allpasstuningL3);
allpassR[2].setbuffer(bufallpassR3,allpasstuningR3);
allpassL[3].setbuffer(bufallpassL4,allpasstuningL4);
allpassR[3].setbuffer(bufallpassR4,allpasstuningR4);
// Set default values
allpassL[0].setfeedback(0.5f);
allpassR[0].setfeedback(0.5f);
allpassL[1].setfeedback(0.5f);
allpassR[1].setfeedback(0.5f);
allpassL[2].setfeedback(0.5f);
allpassR[2].setfeedback(0.5f);
allpassL[3].setfeedback(0.5f);
allpassR[3].setfeedback(0.5f);
param[0] = initialroom;
param[1] = initialdamp;
param[2] = initialwet;
setroomsize(initialroom);
setdamp(initialdamp);
setwidth(initialwidth);
setmode(initialmode);
// Buffer will be full of rubbish - so we MUST mute them
for (int i = 0; i < numcombs; i++) {
combL[i].mute();
combR[i].mute();
}
for (int i=0;i<numallpasses;i++) {
allpassL[i].mute();
allpassR[i].mute();
}
}
//---------------------------------------------------------
// activate
//---------------------------------------------------------
void Revmodel::activate()
{
*port[4] = param[0];
*port[5] = param[1];
*port[6] = param[2];
}
//---------------------------------------------------------
// processreplace
//---------------------------------------------------------
void Revmodel::processreplace(long n)
{
if (param[0] != *port[4]) {
param[0] = *port[4];
setroomsize(param[0]);
}
if (param[1] != *port[5]) {
param[1] = *port[5];
setdamp(param[1]);
}
float wet = (1.0f - *port[6]) * scalewet;
float dry = *port[6] * scaledry;
float wet1 = wet * (width/2 + 0.5f);
float wet2 = wet * ((1-width)/2);
for (int i = 0; i < n; ++i) {
float outL = 0;
float outR = 0;
float input = (port[0][i] + port[1][i]) * gain;
// Accumulate comb filters in parallel
for (int k = 0; k < numcombs; k++) {
outL += combL[k].process(input);
outR += combR[k].process(input);
}
// Feed through allpasses in series
for (int k=0; k < numallpasses; k++) {
outL = allpassL[k].process(outL);
outR = allpassR[k].process(outR);
}
// Calculate output REPLACING anything already there
port[2][i] = outL*wet1 + outR*wet2 + port[0][i]*dry;
port[3][i] = outR*wet1 + outL*wet2 + port[1][i]*dry;
}
}
void Revmodel::processmix(long n)
{
if (param[0] != *port[4]) {
param[0] = *port[4];
setroomsize(param[0]);
}
if (param[1] != *port[5]) {
param[1] = *port[5];
setdamp(param[1]);
}
float wet = (1.0f - *port[6]) * scalewet;
float dry = *port[6] * scaledry;
float wet1 = wet * (width/2 + 0.5f);
float wet2 = wet * ((1-width)/2);
for (int i = 0; i < n; ++i) {
float outL = 0;
float outR = 0;
float input = (port[0][i] + port[1][i]) * gain;
// Accumulate comb filters in parallel
for (int k = 0; k < numcombs; k++) {
outL += combL[k].process(input);
outR += combR[k].process(input);
}
// Feed through allpasses in series
for (int k=0; k < numallpasses; k++) {
outL = allpassL[k].process(outL);
outR = allpassR[k].process(outR);
}
// Calculate output REPLACING anything already there
port[2][i] += outL*wet1 + outR*wet2 + port[0][i]*dry;
port[3][i] += outR*wet1 + outL*wet2 + port[1][i]*dry;
}
}
//---------------------------------------------------------
// update
// Recalculate internal values after parameter change
//---------------------------------------------------------
void Revmodel::update()
{
if (mode >= freezemode) {
roomsize1 = 1;
damp1 = 0;
gain = muted;
}
else {
roomsize1 = roomsize;
damp1 = damp;
gain = fixedgain;
}
for (int i = 0; i < numcombs; i++) {
combL[i].setfeedback(roomsize1);
combR[i].setfeedback(roomsize1);
}
for (int i = 0; i < numcombs; i++) {
combL[i].setdamp(damp1);
combR[i].setdamp(damp1);
}
}
// The following get/set functions are not inlined, because
// speed is never an issue when calling them, and also
// because as you develop the reverb model, you may
// wish to take dynamic action when they are called.
void Revmodel::setroomsize(float value)
{
roomsize = (value*scaleroom) + offsetroom;
update();
}
float Revmodel::getroomsize()
{
return (roomsize-offsetroom)/scaleroom;
}
void Revmodel::setdamp(float value)
{
damp = value*scaledamp;
update();
}
void Revmodel::setwidth(float value)
{
width = value;
update();
}
void Revmodel::setmode(float value)
{
mode = value;
update();
}
float Revmodel::getmode()
{
return (mode >= freezemode) ? 1 : 0;
}
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