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/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
* Copyright (C) 2011-2017 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_TVA_H
#define MT32EMU_TVA_H
#include "globals.h"
#include "Types.h"
#include "Structures.h"
namespace MT32Emu {
class LA32Ramp;
class Part;
class Partial;
// Note that when entering nextPhase(), newPhase is set to phase + 1, and the descriptions/names below refer to
// newPhase's value.
enum {
// In this phase, the base amp (as calculated in calcBasicAmp()) is targeted with an instant time.
// This phase is entered by reset() only if time[0] != 0.
TVA_PHASE_BASIC = 0,
// In this phase, level[0] is targeted within time[0], and velocity potentially affects time
TVA_PHASE_ATTACK = 1,
// In this phase, level[1] is targeted within time[1]
TVA_PHASE_2 = 2,
// In this phase, level[2] is targeted within time[2]
TVA_PHASE_3 = 3,
// In this phase, level[3] is targeted within time[3]
TVA_PHASE_4 = 4,
// In this phase, immediately goes to PHASE_RELEASE unless the poly is set to sustain.
// Aborts the partial if level[3] is 0.
// Otherwise level[3] is continued, no phase change will occur until some external influence (like pedal release)
TVA_PHASE_SUSTAIN = 5,
// In this phase, 0 is targeted within time[4] (the time calculation is quite different from the other phases)
TVA_PHASE_RELEASE = 6,
// It's PHASE_DEAD, Jim.
TVA_PHASE_DEAD = 7
};
class TVA {
private:
const Partial * const partial;
LA32Ramp *ampRamp;
const MemParams::System * const system;
const Part *part;
const TimbreParam::PartialParam *partialParam;
const MemParams::PatchTemp *patchTemp;
const MemParams::RhythmTemp *rhythmTemp;
bool playing;
int biasAmpSubtraction;
int veloAmpSubtraction;
int keyTimeSubtraction;
Bit8u target;
int phase;
void startRamp(Bit8u newTarget, Bit8u newIncrement, int newPhase);
void end(int newPhase);
void nextPhase();
public:
TVA(const Partial *partial, LA32Ramp *ampRamp);
void reset(const Part *part, const TimbreParam::PartialParam *partialParam, const MemParams::RhythmTemp *rhythmTemp);
void handleInterrupt();
void recalcSustain();
void startDecay();
void startAbort();
bool isPlaying() const;
int getPhase() const;
}; // class TVA
} // namespace MT32Emu
#endif // #ifndef MT32EMU_TVA_H
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