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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/>.
*/
#ifndef MT32EMU_A_REVERB_MODEL_H
#define MT32EMU_A_REVERB_MODEL_H
namespace MT32Emu {
struct AReverbSettings {
const Bit32u *allpassSizes;
const Bit32u *delaySizes;
const float *decayTimes;
const float *wetLevels;
float filtVal;
float damp1;
float damp2;
};
class RingBuffer {
protected:
float *buffer;
Bit32u size;
Bit32u index;
public:
RingBuffer(Bit32u size);
virtual ~RingBuffer();
float next();
bool isEmpty();
void mute();
};
class AllpassFilter : public RingBuffer {
public:
AllpassFilter(Bit32u size);
float process(float in);
};
class Delay : public RingBuffer {
public:
Delay(Bit32u size);
float process(float in);
};
class AReverbModel : public ReverbModel {
AllpassFilter **allpasses;
Delay **delays;
const AReverbSettings *currentSettings;
float decayTime;
float wetLevel;
float filterhist1, filterhist2;
float combhist;
void mute();
public:
AReverbModel(const AReverbSettings *newSettings);
~AReverbModel();
void open(unsigned int sampleRate);
void close();
void setParameters(Bit8u time, Bit8u level);
void process(const float *inLeft, const float *inRight, float *outLeft, float *outRight, unsigned long numSamples);
bool isActive() const;
static const AReverbSettings REVERB_MODE_0_SETTINGS;
static const AReverbSettings REVERB_MODE_1_SETTINGS;
static const AReverbSettings REVERB_MODE_2_SETTINGS;
};
// Default reverb settings for modes 0-2
}
#endif
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