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Diffstat (limited to 'audio/softsynth/mt32/AReverbModel.h')
-rw-r--r-- | audio/softsynth/mt32/AReverbModel.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/audio/softsynth/mt32/AReverbModel.h b/audio/softsynth/mt32/AReverbModel.h new file mode 100644 index 0000000000..3fae08c34c --- /dev/null +++ b/audio/softsynth/mt32/AReverbModel.h @@ -0,0 +1,86 @@ +/* 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 |