62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
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* Copyright (C) 2011-2020 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_TVF_H
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#define MT32EMU_TVF_H
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#include "globals.h"
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#include "Types.h"
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#include "Structures.h"
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namespace MT32Emu {
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class LA32Ramp;
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class Partial;
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class TVF {
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private:
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const Partial * const partial;
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LA32Ramp *cutoffModifierRamp;
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const TimbreParam::PartialParam *partialParam;
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Bit8u baseCutoff;
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int keyTimeSubtraction;
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unsigned int levelMult;
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Bit8u target;
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unsigned int phase;
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void startRamp(Bit8u newTarget, Bit8u newIncrement, int newPhase);
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void nextPhase();
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public:
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TVF(const Partial *partial, LA32Ramp *cutoffModifierRamp);
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void reset(const TimbreParam::PartialParam *partialParam, Bit32u basePitch);
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// Returns the base cutoff (without envelope modification).
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// The base cutoff is calculated when reset() is called and remains static
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// for the lifetime of the partial.
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// Barring bugs, the number returned is confirmed accurate
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// (based on specs from Mok).
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Bit8u getBaseCutoff() const;
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void handleInterrupt();
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void startDecay();
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}; // class TVF
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} // namespace MT32Emu
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#endif // #ifndef MT32EMU_TVF_H
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