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/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
* Copyright (C) 2011 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mt32emu.h"
#include "FreeverbModel.h"
#include "freeverb.h"
namespace MT32Emu {
FreeverbModel::FreeverbModel(float useScaleTuning, float useFiltVal, float useWet, Bit8u useRoom, float useDamp) {
freeverb = NULL;
scaleTuning = useScaleTuning;
filtVal = useFiltVal;
wet = useWet;
room = useRoom;
damp = useDamp;
}
FreeverbModel::~FreeverbModel() {
delete freeverb;
}
void FreeverbModel::open(unsigned int /*sampleRate*/) {
// FIXME: scaleTuning must be multiplied by sample rate to 32000Hz ratio
// IIR filter values depend on sample rate as well
if (freeverb == NULL) {
freeverb = new revmodel(scaleTuning);
}
freeverb->mute();
// entrance Lowpass filter factor
freeverb->setfiltval(filtVal);
// decay speed of high frequencies in the wet signal
freeverb->setdamp(damp);
}
void FreeverbModel::close() {
delete freeverb;
freeverb = NULL;
}
void FreeverbModel::process(const float *inLeft, const float *inRight, float *outLeft, float *outRight, unsigned long numSamples) {
freeverb->process(inLeft, inRight, outLeft, outRight, numSamples);
}
void FreeverbModel::setParameters(Bit8u time, Bit8u level) {
// wet signal level
// FIXME: need to implement some sort of reverb level ramping
freeverb->setwet((float)level / 7.0f * wet);
// wet signal decay speed
static float roomTable[] = {
0.25f, 0.37f, 0.54f, 0.71f, 0.78f, 0.86f, 0.93f, 1.00f,
-1.00f, -0.50f, 0.00f, 0.30f, 0.51f, 0.64f, 0.77f, 0.90f,
0.50f, 0.57f, 0.70f, 0.77f, 0.85f, 0.93f, 0.96f, 1.01f};
freeverb->setroomsize(roomTable[8 * room + time]);
}
bool FreeverbModel::isActive() const {
// FIXME: Not bothering to do this properly since we'll be replacing Freeverb soon...
return false;
}
}
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