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/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
* Copyright (C) 2011, 2012, 2013 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_TVF_H
#define MT32EMU_TVF_H
namespace MT32Emu {
class TVF {
private:
const Partial * const partial;
LA32Ramp *cutoffModifierRamp;
const TimbreParam::PartialParam *partialParam;
Bit8u baseCutoff;
int keyTimeSubtraction;
unsigned int levelMult;
Bit8u target;
unsigned int phase;
void startRamp(Bit8u newTarget, Bit8u newIncrement, int newPhase);
void nextPhase();
public:
TVF(const Partial *partial, LA32Ramp *cutoffModifierRamp);
void reset(const TimbreParam::PartialParam *partialParam, Bit32u basePitch);
// Returns the base cutoff (without envelope modification).
// The base cutoff is calculated when reset() is called and remains static
// for the lifetime of the partial.
// Barring bugs, the number returned is confirmed accurate
// (based on specs from Mok).
Bit8u getBaseCutoff() const;
void handleInterrupt();
void startDecay();
};
}
#endif
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