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//=========================================================
// MusE
// Linux Music Editor
// $Id:$
//
// based on "freeverb" written by Jezar at Dreampoint,
// June 2000
//
// (C) Copyright 2007 Werner Schweer (ws@seh.de)
//=========================================================
#include "reverb.h"
//---------------------------------------------------------
// Reverb
//---------------------------------------------------------
Reverb::Reverb()
{
// 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);
setRoomSize(.5);
setMix(.5);
setdamp(.5);
setwidth(initialwidth);
// 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();
}
}
//---------------------------------------------------------
// update
// Recalculate internal values after parameter change
//---------------------------------------------------------
void Reverb::update()
{
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);
}
}
//---------------------------------------------------------
// setroomsize
//---------------------------------------------------------
void Reverb::setRoomSize(float value)
{
roomsize = (value*scaleroom) + offsetroom;
update();
}
//---------------------------------------------------------
// setdamp
//---------------------------------------------------------
void Reverb::setdamp(float value)
{
damp = value*scaledamp;
update();
}
//---------------------------------------------------------
// setwidth
//---------------------------------------------------------
void Reverb::setwidth(float value)
{
width = value;
update();
}
//---------------------------------------------------------
// setMix
//---------------------------------------------------------
void Reverb::setMix(float value)
{
wetLevel = value;
}
//---------------------------------------------------------
// process
//---------------------------------------------------------
void Reverb::process(float* l, float* r, int n)
{
float wet = wetLevel;
float dry = 1.0 - wetLevel;
for (int i = 0; i < n; ++i) {
float outL = 0.0;
float outR = 0.0;
float input = (l[i] + r[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);
}
l[i] = outL * wet + l[i] * dry;
r[i] = outR * wet + r[i] * dry;
}
}
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