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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_PARTIAL_H
#define MT32EMU_PARTIAL_H
namespace MT32Emu {
class Synth;
class Part;
class TVA;
struct ControlROMPCMStruct;
struct StereoVolume {
float leftVol;
float rightVol;
};
// A partial represents one of up to four waveform generators currently playing within a poly.
class Partial {
private:
Synth *synth;
const int debugPartialNum; // Only used for debugging
// Number of the sample currently being rendered by generateSamples(), or 0 if no run is in progress
// This is only kept available for debugging purposes.
unsigned long sampleNum;
int ownerPart; // -1 if unassigned
int mixType;
int structurePosition; // 0 or 1 of a structure pair
StereoVolume stereoVolume;
Bit16s myBuffer[MAX_SAMPLES_PER_RUN];
// Only used for PCM partials
int pcmNum;
// FIXME: Give this a better name (e.g. pcmWaveInfo)
PCMWaveEntry *pcmWave;
// Final pulse width value, with velfollow applied, matching what is sent to the LA32.
// Range: 0-255
int pulseWidthVal;
Poly *poly;
LA32Ramp ampRamp;
LA32Ramp cutoffModifierRamp;
// TODO: This should be owned by PartialPair
LA32PartialPair la32Pair;
Bit32u getAmpValue();
Bit32u getCutoffValue();
public:
const PatchCache *patchCache;
TVA *tva;
TVP *tvp;
TVF *tvf;
PatchCache cachebackup;
Partial *pair;
bool alreadyOutputed;
Partial(Synth *synth, int debugPartialNum);
~Partial();
int debugGetPartialNum() const;
unsigned long debugGetSampleNum() const;
int getOwnerPart() const;
const Poly *getPoly() const;
bool isActive() const;
void activate(int part);
void deactivate(void);
void startPartial(const Part *part, Poly *usePoly, const PatchCache *useCache, const MemParams::RhythmTemp *rhythmTemp, Partial *pairPartial);
void startAbort();
void startDecayAll();
bool shouldReverb();
bool hasRingModulatingSlave() const;
bool isRingModulatingSlave() const;
bool isPCM() const;
const ControlROMPCMStruct *getControlROMPCMStruct() const;
Synth *getSynth() const;
// Returns true only if data written to buffer
// This function (unlike the one below it) returns processed stereo samples
// made from combining this single partial with its pair, if it has one.
bool produceOutput(float *leftBuf, float *rightBuf, unsigned long length);
// This function writes mono sample output to the provided buffer, and returns the number of samples written
unsigned long generateSamples(Bit16s *partialBuf, unsigned long length);
};
}
#endif
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