b8d70d26fa
This update uses upstream commit f88ef828a600ce66d1f730c8fb2a7f580f6f6165. This update switches to use the new Munt C++ interface, which will allow ScummVM to link to an external Munt library instead of requiring it to be built-in in the future. For the moment, the emulator is still built-in, since it is not available from most package repositories. The Munt driver in ScummVM now uses writeSysex instead of the (now-private) playSysexWithoutFraming, per recommendation from the Munt team <https://github.com/munt/munt/pull/30>. This changeset also removes direct modifications that used to be made to Munt code, to ease future updates. To update Munt code in the future: 1. Replace all source files in the `softsynth/mt32` directory with new files from the upstream `mt32emu/src` directory; 2. Update `config.h` with the correct version number for the new version of Munt; 3. Update `module.mk` to add any new source files that need to be built.
122 lines
3.5 KiB
C++
Executable file
122 lines
3.5 KiB
C++
Executable file
/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
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* Copyright (C) 2011-2016 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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#ifndef MT32EMU_B_REVERB_MODEL_H
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#define MT32EMU_B_REVERB_MODEL_H
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#include "globals.h"
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#include "internals.h"
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#include "Types.h"
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namespace MT32Emu {
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struct BReverbSettings {
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const Bit32u numberOfAllpasses;
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const Bit32u * const allpassSizes;
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const Bit32u numberOfCombs;
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const Bit32u * const combSizes;
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const Bit32u * const outLPositions;
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const Bit32u * const outRPositions;
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const Bit8u * const filterFactors;
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const Bit8u * const feedbackFactors;
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const Bit8u * const dryAmps;
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const Bit8u * const wetLevels;
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const Bit8u lpfAmp;
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};
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class RingBuffer {
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protected:
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Sample *buffer;
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const Bit32u size;
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Bit32u index;
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public:
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RingBuffer(const Bit32u size);
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virtual ~RingBuffer();
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Sample next();
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bool isEmpty() const;
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void mute();
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};
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class AllpassFilter : public RingBuffer {
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public:
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AllpassFilter(const Bit32u size);
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Sample process(const Sample in);
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};
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class CombFilter : public RingBuffer {
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protected:
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const Bit8u filterFactor;
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Bit8u feedbackFactor;
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public:
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CombFilter(const Bit32u size, const Bit8u useFilterFactor);
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virtual void process(const Sample in);
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Sample getOutputAt(const Bit32u outIndex) const;
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void setFeedbackFactor(const Bit8u useFeedbackFactor);
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};
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class DelayWithLowPassFilter : public CombFilter {
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Bit8u amp;
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public:
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DelayWithLowPassFilter(const Bit32u useSize, const Bit8u useFilterFactor, const Bit8u useAmp);
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void process(const Sample in);
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void setFeedbackFactor(const Bit8u) {}
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};
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class TapDelayCombFilter : public CombFilter {
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Bit32u outL;
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Bit32u outR;
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public:
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TapDelayCombFilter(const Bit32u useSize, const Bit8u useFilterFactor);
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void process(const Sample in);
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Sample getLeftOutput() const;
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Sample getRightOutput() const;
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void setOutputPositions(const Bit32u useOutL, const Bit32u useOutR);
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};
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class BReverbModel {
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AllpassFilter **allpasses;
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CombFilter **combs;
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const BReverbSettings ¤tSettings;
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const bool tapDelayMode;
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Bit8u dryAmp;
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Bit8u wetLevel;
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static const BReverbSettings &getCM32L_LAPCSettings(const ReverbMode mode);
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static const BReverbSettings &getMT32Settings(const ReverbMode mode);
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public:
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BReverbModel(const ReverbMode mode, const bool mt32CompatibleModel = false);
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~BReverbModel();
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// After construction or a close(), open() must be called at least once before any other call (with the exception of close()).
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void open();
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// May be called multiple times without an open() in between.
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void close();
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void mute();
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void setParameters(Bit8u time, Bit8u level);
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void process(const Sample *inLeft, const Sample *inRight, Sample *outLeft, Sample *outRight, Bit32u numSamples);
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bool isActive() const;
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bool isMT32Compatible(const ReverbMode mode) const;
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};
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} // namespace MT32Emu
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#endif // #ifndef MT32EMU_B_REVERB_MODEL_H
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