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