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101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
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* Copyright (C) 2011-2017 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_TVA_H
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#define MT32EMU_TVA_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 Part;
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class Partial;
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// Note that when entering nextPhase(), newPhase is set to phase + 1, and the descriptions/names below refer to
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// newPhase's value.
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enum {
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// In this phase, the base amp (as calculated in calcBasicAmp()) is targeted with an instant time.
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// This phase is entered by reset() only if time[0] != 0.
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TVA_PHASE_BASIC = 0,
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// In this phase, level[0] is targeted within time[0], and velocity potentially affects time
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TVA_PHASE_ATTACK = 1,
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// In this phase, level[1] is targeted within time[1]
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TVA_PHASE_2 = 2,
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// In this phase, level[2] is targeted within time[2]
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TVA_PHASE_3 = 3,
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// In this phase, level[3] is targeted within time[3]
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TVA_PHASE_4 = 4,
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// In this phase, immediately goes to PHASE_RELEASE unless the poly is set to sustain.
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// Aborts the partial if level[3] is 0.
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// Otherwise level[3] is continued, no phase change will occur until some external influence (like pedal release)
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TVA_PHASE_SUSTAIN = 5,
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// In this phase, 0 is targeted within time[4] (the time calculation is quite different from the other phases)
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TVA_PHASE_RELEASE = 6,
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// It's PHASE_DEAD, Jim.
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TVA_PHASE_DEAD = 7
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};
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class TVA {
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private:
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const Partial * const partial;
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LA32Ramp *ampRamp;
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const MemParams::System * const system;
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const Part *part;
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const TimbreParam::PartialParam *partialParam;
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const MemParams::PatchTemp *patchTemp;
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const MemParams::RhythmTemp *rhythmTemp;
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bool playing;
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int biasAmpSubtraction;
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int veloAmpSubtraction;
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int keyTimeSubtraction;
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Bit8u target;
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int phase;
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void startRamp(Bit8u newTarget, Bit8u newIncrement, int newPhase);
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void end(int newPhase);
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void nextPhase();
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public:
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TVA(const Partial *partial, LA32Ramp *ampRamp);
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void reset(const Part *part, const TimbreParam::PartialParam *partialParam, const MemParams::RhythmTemp *rhythmTemp);
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void handleInterrupt();
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void recalcSustain();
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void startDecay();
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void startAbort();
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bool isPlaying() const;
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int getPhase() const;
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}; // class TVA
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} // namespace MT32Emu
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#endif // #ifndef MT32EMU_TVA_H
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