mirror of
https://github.com/libretro/scummvm.git
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FM-TOWNS AUDIO: cleanup
(move some stuff from TownsAudioInterfaceInternal to TownsAudio_PcmChannel)
This commit is contained in:
athrxx
parent
d61dc2574b
commit
4b77a5a12e
@ -28,59 +28,9 @@
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#include "common/textconsole.h"
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#include "backends/audiocd/audiocd.h"
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class TownsAudio_PcmChannel {
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friend class TownsAudioInterfaceInternal;
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public:
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TownsAudio_PcmChannel();
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~TownsAudio_PcmChannel();
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private:
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void loadExtData(uint8 *buffer, uint32 size);
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void setupLoop(uint32 start, uint32 len);
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void clear();
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void envAttack();
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void envDecay();
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void envSustain();
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void envRelease();
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uint8 *curInstrument;
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uint8 note;
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uint8 velo;
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int8 *data;
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int8 *dataEnd;
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int8 *loopEnd;
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uint32 loopLen;
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uint16 stepNote;
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uint16 stepPitch;
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uint16 step;
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uint8 panLeft;
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uint8 panRight;
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uint32 pos;
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uint8 envTotalLevel;
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uint8 envAttackRate;
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uint8 envDecayRate;
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uint8 envSustainLevel;
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uint8 envSustainRate;
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uint8 envReleaseRate;
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int16 envStep;
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int16 envCurrentLevel;
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EnvelopeState envState;
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int8 *extData;
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};
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class TownsAudio_WaveTable {
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friend class TownsAudioInterfaceInternal;
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friend class TownsAudio_PcmChannel;
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public:
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TownsAudio_WaveTable();
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~TownsAudio_WaveTable();
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@ -101,6 +51,87 @@ private:
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int8 *data;
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};
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class TownsAudio_PcmChannel {
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public:
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TownsAudio_PcmChannel();
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~TownsAudio_PcmChannel();
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void clear();
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void loadData(TownsAudio_WaveTable *w);
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void loadData(uint8 *buffer, uint32 size);
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int initInstrument(uint8 ¬e, TownsAudio_WaveTable *&tables, int numTables);
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void keyOn(uint8 note, uint8 velo, TownsAudio_WaveTable *w);
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void keyOff();
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void updateEnvelopeGenerator();
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void setInstrument(uint8 *instr);
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void setLevel(uint8 lvl);
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void setPitch(uint32 pt);
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void setBalance(uint8 blc);
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void updateOutput();
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int32 currentSampleLeft();
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int32 currentSampleRight();
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bool _keyPressed;
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bool _reserved;
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bool _activeKey;
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bool _activeEffect;
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bool _activeOutput;
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private:
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void setupLoop(uint32 loopStart, uint32 len);
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void setNote(uint8 note, TownsAudio_WaveTable *w, bool stepLimit = false);
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void setVelo(uint8 velo);
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void envAttack();
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void envDecay();
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void envSustain();
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void envRelease();
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uint8 *_curInstrument;
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uint8 _note;
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uint8 _velo;
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uint8 _level;
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uint8 _tl;
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uint8 _panLeft;
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uint8 _panRight;
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int8 *_data;
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int8 *_dataEnd;
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int8 *_loopEnd;
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uint32 _loopLen;
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uint16 _stepNote;
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uint16 _stepPitch;
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uint16 _step;
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uint32 _pos;
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uint8 _envTotalLevel;
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uint8 _envAttackRate;
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uint8 _envDecayRate;
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uint8 _envSustainLevel;
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uint8 _envSustainRate;
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uint8 _envReleaseRate;
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int16 _envStep;
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int16 _envCurrentLevel;
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EnvelopeState _envState;
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int8 *_extData;
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static const uint16 _pcmPhase1[];
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static const uint16 _pcmPhase2[];
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};
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class TownsAudioInterfaceInternal : public TownsPC98_FmSynth {
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public:
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TownsAudioInterfaceInternal(Audio::Mixer *mixer, TownsAudioInterface *owner, TownsAudioInterfacePluginDriver *driver, bool externalMutexHandling = false);
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@ -202,18 +233,8 @@ private:
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int pcmLoadInstrument(int instrId, const uint8 *data);
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int pcmSetPitch(int chan, int pitch);
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int pcmSetLevel(int chan, int lvl);
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void pcmUpdateEnvelopeGenerator(int chan);
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TownsAudio_PcmChannel *_pcmChan;
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uint8 _pcmChanOut;
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uint8 _pcmChanReserved;
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uint8 _pcmChanKeyPressed;
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uint8 _pcmChanEffectPlaying;
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uint8 _pcmChanKeyPlaying;
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uint8 _pcmChanNote[8];
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uint8 _pcmChanVelo[8];
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uint8 _pcmChanLevel[8];
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uint8 _numReservedChannels;
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uint8 *_pcmInstruments;
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@ -222,8 +243,6 @@ private:
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uint8 _numWaveTables;
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uint32 _waveTablesTotalDataSize;
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void pcmCalcPhaseStep(TownsAudio_PcmChannel *p, TownsAudio_WaveTable *w);
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void updateOutputVolume();
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void updateOutputVolumeInternal();
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uint8 _outputVolumeFlags;
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@ -251,8 +270,6 @@ private:
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static const uint16 _frequency[];
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static const uint8 _carrier[];
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static const uint8 _fmDefaultInstrument[];
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static const uint16 _pcmPhase1[];
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static const uint16 _pcmPhase2[];
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};
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TownsAudioInterfaceInternal::TownsAudioInterfaceInternal(Audio::Mixer *mixer, TownsAudioInterface *owner, TownsAudioInterfacePluginDriver *driver, bool externalMutexHandling) :
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@ -260,8 +277,7 @@ TownsAudioInterfaceInternal::TownsAudioInterfaceInternal(Audio::Mixer *mixer, To
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_fmInstruments(0), _pcmInstruments(0), _pcmChan(0), _waveTables(0), _waveTablesTotalDataSize(0),
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_baserate(55125.0f / (float)mixer->getOutputRate()), _tickLength(0), _timer(0), _drv(driver), _drvOwner(owner),
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_pcmSfxChanMask(0), _musicVolume(Audio::Mixer::kMaxMixerVolume), _sfxVolume(Audio::Mixer::kMaxMixerVolume),
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_outputVolumeFlags(0), _pcmChanOut(0), _pcmChanReserved(0), _pcmChanKeyPressed(0),
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_pcmChanEffectPlaying(0), _pcmChanKeyPlaying(0), _fmChanPlaying(0),
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_outputVolumeFlags(0), _fmChanPlaying(0),
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_numReservedChannels(0), _numWaveTables(0), _updateOutputVol(false), _ready(false) {
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#define INTCB(x) &TownsAudioInterfaceInternal::intf_##x
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@ -377,9 +393,6 @@ TownsAudioInterfaceInternal::TownsAudioInterfaceInternal(Audio::Mixer *mixer, To
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memset(_fmSaveReg, 0, sizeof(_fmSaveReg));
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memset(_fmChanNote, 0, sizeof(_fmChanNote));
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memset(_fmChanPitch, 0, sizeof(_fmChanPitch));
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memset(_pcmChanNote, 0, sizeof(_pcmChanNote));
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memset(_pcmChanVelo, 0, sizeof(_pcmChanVelo));
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memset(_pcmChanLevel, 0, sizeof(_pcmChanLevel));
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memset(_outputLevel, 0, sizeof(_outputLevel));
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memset(_outputMute, 0, sizeof(_outputMute));
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@ -530,40 +543,30 @@ void TownsAudioInterfaceInternal::nextTickEx(int32 *buffer, uint32 bufferSize) {
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while (_timer > 0x514767) {
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_timer -= 0x514767;
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for (int ii = 0; ii < 8; ii++) {
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if ((_pcmChanKeyPlaying & _chanFlags[ii]) || (_pcmChanEffectPlaying & _chanFlags[ii])) {
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TownsAudio_PcmChannel *s = &_pcmChan[ii];
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s->pos += s->step;
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if (&s->data[s->pos >> 11] >= s->loopEnd) {
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if (s->loopLen) {
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s->pos -= s->loopLen;
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} else {
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s->pos = 0;
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_pcmChanEffectPlaying &= ~_chanFlags[ii];
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_pcmChanKeyPlaying &= ~_chanFlags[ii];
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}
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}
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}
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}
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for (int ii = 0; ii < 8; ii++)
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_pcmChan[ii].updateOutput();
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}
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int32 finOutL = 0;
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int32 finOutR = 0;
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for (int ii = 0; ii < 8; ii++) {
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if (_pcmChanOut & _chanFlags[ii]) {
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int32 o = _pcmChan[ii].data[_pcmChan[ii].pos >> 11] * _pcmChan[ii].velo;
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if ((1 << ii) & (~_pcmSfxChanMask))
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o = (o * _musicVolume) / Audio::Mixer::kMaxMixerVolume;
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if ((1 << ii) & _pcmSfxChanMask)
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o = (o * _sfxVolume) / Audio::Mixer::kMaxMixerVolume;
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if (_pcmChan[ii].panLeft)
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finOutL += ((o * _pcmChan[ii].panLeft) >> 3);
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if (_pcmChan[ii].panRight)
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finOutR += ((o * _pcmChan[ii].panRight) >> 3);
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if (!((_pcmChanKeyPlaying & _chanFlags[ii]) || (_pcmChanEffectPlaying & _chanFlags[ii])))
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_pcmChanOut &= ~_chanFlags[ii];
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if (_pcmChan[ii]._activeOutput) {
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int32 oL = _pcmChan[ii].currentSampleLeft();
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int32 oR = _pcmChan[ii].currentSampleRight();
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if ((1 << ii) & (~_pcmSfxChanMask)) {
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oL = (oR * _musicVolume) / Audio::Mixer::kMaxMixerVolume;
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oR = (oR * _musicVolume) / Audio::Mixer::kMaxMixerVolume;
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}
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if ((1 << ii) & _pcmSfxChanMask) {
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oL = (oL * _sfxVolume) / Audio::Mixer::kMaxMixerVolume;
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oR = (oR * _sfxVolume) / Audio::Mixer::kMaxMixerVolume;
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}
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finOutL += oL;
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finOutR += oR;
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if (!(_pcmChan[ii]._activeKey || _pcmChan[ii]._activeEffect))
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_pcmChan[ii]._activeOutput = false;
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}
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}
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@ -750,22 +753,19 @@ int TownsAudioInterfaceInternal::intf_reserveEffectChannels(va_list &args) {
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if (numChan < _numReservedChannels) {
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int c = 8 - _numReservedChannels;
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for (int i = numChan; i; i--) {
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uint8 f = ~_chanFlags[c--];
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_pcmChanEffectPlaying &= f;
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}
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for (int i = numChan; i; i--)
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_pcmChan[c--]._activeEffect = false;
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} else {
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int c = 7 - _numReservedChannels;
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for (int i = numChan - _numReservedChannels; i; i--) {
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uint8 f = ~_chanFlags[c--];
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_pcmChanKeyPressed &= f;
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_pcmChanKeyPlaying &= f;
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_pcmChan[c]._keyPressed = false;
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_pcmChan[c--]._activeKey = false;
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}
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}
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static const uint8 reserveChanFlags[] = { 0x00, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE, 0xFF };
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_numReservedChannels = numChan;
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_pcmChanReserved = reserveChanFlags[_numReservedChannels];
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for (int i = 0; i < 8; i++)
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_pcmChan[i]._reserved = i >= (8 - _numReservedChannels) ? true : false;
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return 0;
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}
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@ -838,10 +838,10 @@ int TownsAudioInterfaceInternal::intf_pcmPlayEffect(va_list &args) {
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chan -= 0x40;
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if (!(_pcmChanReserved & _chanFlags[chan]))
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if (!_pcmChan[chan]._reserved)
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return 7;
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if ((_pcmChanEffectPlaying & _chanFlags[chan]))
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if (_pcmChan[chan]._activeEffect)
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return 2;
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TownsAudio_WaveTable w;
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@ -855,21 +855,8 @@ int TownsAudioInterfaceInternal::intf_pcmPlayEffect(va_list &args) {
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TownsAudio_PcmChannel *p = &_pcmChan[chan];
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_pcmChanNote[chan] = note;
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_pcmChanVelo[chan] = velo;
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p->note = note;
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p->velo = velo << 1;
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p->loadExtData(data + 32, w.size);
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p->setupLoop(w.loopStart, w.loopLen);
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pcmCalcPhaseStep(p, &w);
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if (p->step > 2048)
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p->step = 2048;
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_pcmChanEffectPlaying |= _chanFlags[chan];
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_pcmChanOut |= _chanFlags[chan];
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p->loadData(data + 32, w.size);
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p->keyOn(note, velo, &w);
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return 0;
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}
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@ -885,7 +872,7 @@ int TownsAudioInterfaceInternal::intf_pcmEffectPlaying(va_list &args) {
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if (chan < 0x40 || chan > 0x47)
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return 1;
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chan -= 0x40;
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return (_pcmChanEffectPlaying & _chanFlags[chan]) ? 1 : 0;
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return _pcmChan[chan]._activeEffect ? 1 : 0;
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}
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int TownsAudioInterfaceInternal::intf_fmKeyOn(va_list &args) {
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@ -1044,7 +1031,7 @@ int TownsAudioInterfaceInternal::intf_getOutputMute (va_list &args) {
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int TownsAudioInterfaceInternal::intf_pcmUpdateEnvelopeGenerator(va_list &args) {
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for (int i = 0; i < 8; i++)
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pcmUpdateEnvelopeGenerator(i);
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_pcmChan[i].updateEnvelopeGenerator();
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return 0;
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}
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@ -1375,14 +1362,8 @@ void TownsAudioInterfaceInternal::bufferedWriteReg(uint8 part, uint8 regAddress,
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}
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void TownsAudioInterfaceInternal::pcmReset() {
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_pcmChanOut = 0;
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_pcmChanReserved = _pcmChanKeyPressed = _pcmChanEffectPlaying = _pcmChanKeyPlaying = 0;
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_numReservedChannels = 0;
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memset(_pcmChanNote, 0, 8);
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memset(_pcmChanVelo, 0, 8);
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memset(_pcmChanLevel, 0, 8);
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for (int i = 0; i < 8; i++)
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_pcmChan[i].clear();
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@ -1410,65 +1391,19 @@ int TownsAudioInterfaceInternal::pcmKeyOn(int chan, int note, int velo) {
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return 3;
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chan -= 0x40;
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uint8 noteT = note;
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TownsAudio_PcmChannel *p = &_pcmChan[chan];
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if ((_pcmChanReserved & _chanFlags[chan]) || (_pcmChanKeyPressed & _chanFlags[chan]))
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if (p->_reserved || p->_keyPressed)
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return 2;
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_pcmChanNote[chan] = note;
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_pcmChanVelo[chan] = velo;
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TownsAudio_WaveTable *w = _waveTables;
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int res = p->initInstrument(noteT, w, _numWaveTables);
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if (res)
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return res;
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TownsAudio_PcmChannel *p = &_pcmChan[chan];
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p->note = note;
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uint8 *instr = _pcmChan[chan].curInstrument;
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int i = 0;
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for (; i < 8; i++) {
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if (note <= instr[16 + 2 * i])
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break;
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}
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if (i == 8)
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return 8;
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int il = i << 3;
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p->note += instr[il + 70];
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p->envTotalLevel = instr[il + 64];
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p->envAttackRate = instr[il + 65];
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p->envDecayRate = instr[il + 66];
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p->envSustainLevel = instr[il + 67];
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p->envSustainRate = instr[il + 68];
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p->envReleaseRate = instr[il + 69];
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p->envStep = 0;
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int32 id = (int32)READ_LE_UINT32(&instr[i * 4 + 32]);
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for (i = 0; i < _numWaveTables; i++) {
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if (id == _waveTables[i].id)
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break;
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}
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if (i == _numWaveTables)
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return 9;
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TownsAudio_WaveTable *w = &_waveTables[i];
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p->data = w->data;
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p->dataEnd = w->data + w->size;
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p->setupLoop(w->loopStart, w->loopLen);
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pcmCalcPhaseStep(p, w);
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uint32 lvl = _pcmChanLevel[chan] * _pcmChanVelo[chan];
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p->envTotalLevel = ((p->envTotalLevel * lvl) >> 14) & 0xff;
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p->envSustainLevel = ((p->envSustainLevel * lvl) >> 14) & 0xff;
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p->envAttack();
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p->velo = (p->envCurrentLevel >> 8) << 1;
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_pcmChanKeyPressed |= _chanFlags[chan];
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_pcmChanKeyPlaying |= _chanFlags[chan];
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_pcmChanOut |= _chanFlags[chan];
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p->loadData(w);
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p->keyOn(noteT, velo, w);
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return 0;
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}
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@ -1478,8 +1413,7 @@ int TownsAudioInterfaceInternal::pcmKeyOff(int chan) {
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return 1;
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chan -= 0x40;
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_pcmChanKeyPressed &= ~_chanFlags[chan];
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_pcmChan[chan].envRelease();
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_pcmChan[chan].keyOff();
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return 0;
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}
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@ -1488,11 +1422,7 @@ int TownsAudioInterfaceInternal::pcmChanOff(int chan) {
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return 1;
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chan -= 0x40;
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_pcmChanKeyPressed &= ~_chanFlags[chan];
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_pcmChanEffectPlaying &= ~_chanFlags[chan];
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_pcmChanKeyPlaying &= ~_chanFlags[chan];
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_pcmChanOut &= ~_chanFlags[chan];
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_pcmChan[chan]._keyPressed = _pcmChan[chan]._activeEffect = _pcmChan[chan]._activeKey = _pcmChan[chan]._activeOutput = false;
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return 0;
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}
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@ -1514,8 +1444,7 @@ int TownsAudioInterfaceInternal::pcmSetPanPos(int chan, int mode) {
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blc = ((119 + mode) ^ (mode << 4)) & 0xff;
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}
|
||||
|
||||
_pcmChan[chan].panLeft = blc & 0x0f;
|
||||
_pcmChan[chan].panRight = blc >> 4;
|
||||
_pcmChan[chan].setBalance(blc);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1526,7 +1455,8 @@ int TownsAudioInterfaceInternal::pcmSetInstrument(int chan, int instrId) {
|
||||
if (instrId > 31)
|
||||
return 3;
|
||||
chan -= 0x40;
|
||||
_pcmChan[chan].curInstrument = &_pcmInstruments[instrId * 128];
|
||||
_pcmChan[chan].setInstrument(&_pcmInstruments[instrId * 128]);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -1555,15 +1485,7 @@ int TownsAudioInterfaceInternal::pcmSetPitch(int chan, int pitch) {
|
||||
else if (pitch > 0)
|
||||
pts = (((pitch + 0x2001) << 16) / 0x2000) >> 2;
|
||||
|
||||
p->stepPitch = pts & 0xffff;
|
||||
p->step = (p->stepNote * p->stepPitch) >> 14;
|
||||
|
||||
// if (_pcmChanUnkFlag & _chanFlags[chan])
|
||||
// unk[chan] = (((p->step * 1000) << 11) / 98) / 20833;
|
||||
|
||||
/*else*/
|
||||
if ((_pcmChanEffectPlaying & _chanFlags[chan]) && (p->step > 2048))
|
||||
p->step = 2048;
|
||||
p->setPitch(pts);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1576,98 +1498,11 @@ int TownsAudioInterfaceInternal::pcmSetLevel(int chan, int lvl) {
|
||||
return 3;
|
||||
|
||||
chan -= 0x40;
|
||||
TownsAudio_PcmChannel *p = &_pcmChan[chan];
|
||||
|
||||
if (_pcmChanReserved & _chanFlags[chan]) {
|
||||
_pcmChanVelo[chan] = lvl;
|
||||
p->velo = lvl << 1;
|
||||
} else {
|
||||
int32 t = p->envStep * lvl;
|
||||
if (_pcmChanLevel[chan])
|
||||
t /= _pcmChanLevel[chan];
|
||||
p->envStep = t;
|
||||
t = p->envCurrentLevel * lvl;
|
||||
if (_pcmChanLevel[chan])
|
||||
t /= _pcmChanLevel[chan];
|
||||
p->envCurrentLevel = t;
|
||||
_pcmChanLevel[chan] = lvl;
|
||||
p->velo = p->envCurrentLevel >> 8;
|
||||
}
|
||||
_pcmChan[chan].setLevel(lvl);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void TownsAudioInterfaceInternal::pcmUpdateEnvelopeGenerator(int chan) {
|
||||
TownsAudio_PcmChannel *p = &_pcmChan[chan];
|
||||
if (!p->envCurrentLevel) {
|
||||
_pcmChanKeyPlaying &= ~_chanFlags[chan];
|
||||
p->envState = kEnvReady;
|
||||
}
|
||||
|
||||
if (!(_pcmChanKeyPlaying & _chanFlags[chan]))
|
||||
return;
|
||||
|
||||
switch (p->envState) {
|
||||
case kEnvAttacking:
|
||||
if (((p->envCurrentLevel + p->envStep) >> 8) > p->envTotalLevel) {
|
||||
p->envDecay();
|
||||
return;
|
||||
} else {
|
||||
p->envCurrentLevel += p->envStep;
|
||||
}
|
||||
break;
|
||||
|
||||
case kEnvDecaying:
|
||||
if (((p->envCurrentLevel - p->envStep) >> 8) < p->envSustainLevel) {
|
||||
p->envSustain();
|
||||
return;
|
||||
} else {
|
||||
p->envCurrentLevel -= p->envStep;
|
||||
}
|
||||
break;
|
||||
|
||||
case kEnvSustaining:
|
||||
case kEnvReleasing:
|
||||
p->envCurrentLevel -= p->envStep;
|
||||
if (p->envCurrentLevel <= 0)
|
||||
p->envCurrentLevel = 0;
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
p->velo = (p->envCurrentLevel >> 8) << 1;
|
||||
}
|
||||
|
||||
void TownsAudioInterfaceInternal::pcmCalcPhaseStep(TownsAudio_PcmChannel *p, TownsAudio_WaveTable *w) {
|
||||
int8 diff = p->note - w->baseNote;
|
||||
uint16 r = w->rate + w->rateOffs;
|
||||
uint16 bl = 0;
|
||||
uint32 s = 0;
|
||||
|
||||
if (diff < 0) {
|
||||
diff *= -1;
|
||||
bl = diff % 12;
|
||||
diff /= 12;
|
||||
s = (r >> diff);
|
||||
if (bl)
|
||||
s = (s * _pcmPhase2[bl]) >> 16;
|
||||
|
||||
} else if (diff > 0) {
|
||||
bl = diff % 12;
|
||||
diff /= 12;
|
||||
s = (r << diff);
|
||||
if (bl)
|
||||
s += ((s * _pcmPhase1[bl]) >> 16);
|
||||
|
||||
} else {
|
||||
s = r;
|
||||
}
|
||||
|
||||
p->stepNote = s & 0xffff;
|
||||
p->step = (s * p->stepPitch) >> 14;
|
||||
}
|
||||
|
||||
void TownsAudioInterfaceInternal::updateOutputVolume() {
|
||||
// Avoid calls to g_system->getAudioCDManager() functions from the main thread
|
||||
// since this can cause mutex lockups.
|
||||
@ -1717,16 +1552,8 @@ const uint8 TownsAudioInterfaceInternal::_fmDefaultInstrument[] = {
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
};
|
||||
|
||||
const uint16 TownsAudioInterfaceInternal::_pcmPhase1[] = {
|
||||
0x879B, 0x0F37, 0x1F58, 0x306E, 0x4288, 0x55B6, 0x6A08, 0x7F8F, 0x965E, 0xAE88, 0xC882, 0xE341
|
||||
};
|
||||
|
||||
const uint16 TownsAudioInterfaceInternal::_pcmPhase2[] = {
|
||||
0xFEFE, 0xF1A0, 0xE411, 0xD744, 0xCB2F, 0xBFC7, 0xB504, 0xAAE2, 0xA144, 0x9827, 0x8FAC
|
||||
};
|
||||
|
||||
TownsAudio_PcmChannel::TownsAudio_PcmChannel() {
|
||||
extData = 0;
|
||||
_extData = 0;
|
||||
clear();
|
||||
}
|
||||
|
||||
@ -1734,97 +1561,316 @@ TownsAudio_PcmChannel::~TownsAudio_PcmChannel() {
|
||||
clear();
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::loadExtData(uint8 *buffer, uint32 size) {
|
||||
delete[] extData;
|
||||
extData = new int8[size];
|
||||
void TownsAudio_PcmChannel::clear() {
|
||||
_curInstrument = 0;
|
||||
_note = _tl = _level = _velo = 0;
|
||||
|
||||
_data = 0;
|
||||
_dataEnd = 0;
|
||||
_loopLen = 0;
|
||||
|
||||
_pos = 0;
|
||||
_loopEnd = 0;
|
||||
|
||||
_step = 0;
|
||||
_stepNote = 0x4000;
|
||||
_stepPitch = 0x4000;
|
||||
|
||||
_panLeft = _panRight = 7;
|
||||
|
||||
_envTotalLevel = _envAttackRate = _envDecayRate = _envSustainLevel = _envSustainRate = _envReleaseRate = 0;
|
||||
_envStep = _envCurrentLevel = 0;
|
||||
|
||||
_envState = kEnvReady;
|
||||
|
||||
_activeKey = _activeEffect = _activeOutput = _keyPressed = _reserved = false;
|
||||
|
||||
delete[] _extData;
|
||||
_extData = 0;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::loadData(TownsAudio_WaveTable *w) {
|
||||
_data = w->data;
|
||||
_dataEnd = w->data + w->size;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::loadData(uint8 *buffer, uint32 size) {
|
||||
delete[] _extData;
|
||||
_extData = new int8[size];
|
||||
int8 *src = (int8 *)buffer;
|
||||
int8 *dst = extData;
|
||||
int8 *dst = _extData;
|
||||
for (uint32 i = 0; i < size; i++)
|
||||
*dst++ = *src & 0x80 ? (*src++ & 0x7f) : -*src++;
|
||||
|
||||
data = extData;
|
||||
dataEnd = extData + size;
|
||||
pos = 0;
|
||||
_data = _extData;
|
||||
_dataEnd = _extData + size;
|
||||
_pos = 0;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::setupLoop(uint32 start, uint32 len) {
|
||||
loopLen = len << 11;
|
||||
loopEnd = loopLen ? &data[(start + loopLen) >> 11] : dataEnd;
|
||||
pos = start;
|
||||
int TownsAudio_PcmChannel::initInstrument(uint8 ¬e, TownsAudio_WaveTable *&tables, int numTables) {
|
||||
int i = 0;
|
||||
for (; i < 8; i++) {
|
||||
if (note <= _curInstrument[16 + 2 * i])
|
||||
break;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::clear() {
|
||||
curInstrument = 0;
|
||||
note = 0;
|
||||
velo = 0;
|
||||
if (i == 8)
|
||||
return 8;
|
||||
|
||||
data = 0;
|
||||
dataEnd = 0;
|
||||
loopLen = 0;
|
||||
int il = i << 3;
|
||||
note += _curInstrument[il + 70];
|
||||
|
||||
pos = 0;
|
||||
loopEnd = 0;
|
||||
uint8 *d = &_curInstrument[il + 64];
|
||||
_envTotalLevel = d[0];
|
||||
_envAttackRate = d[1];
|
||||
_envDecayRate = d[2];
|
||||
_envSustainLevel = d[3];
|
||||
_envSustainRate = d[4];
|
||||
_envReleaseRate = d[5];
|
||||
_envStep = 0;
|
||||
note += d[6];
|
||||
|
||||
step = 0;
|
||||
stepNote = 0x4000;
|
||||
stepPitch = 0x4000;
|
||||
int32 id = (int32)READ_LE_UINT32(&_curInstrument[i * 4 + 32]);
|
||||
|
||||
panLeft = panRight = 7;
|
||||
for (i = 0; i < numTables; i++) {
|
||||
if (id == tables[i].id)
|
||||
break;
|
||||
}
|
||||
|
||||
envTotalLevel = envAttackRate = envDecayRate = envSustainLevel = envSustainRate = envReleaseRate = 0;
|
||||
envStep = envCurrentLevel = 0;
|
||||
if (i == numTables)
|
||||
return 9;
|
||||
|
||||
envState = kEnvReady;
|
||||
tables = &tables[i];
|
||||
return 0;
|
||||
}
|
||||
|
||||
delete[] extData;
|
||||
extData = 0;
|
||||
void TownsAudio_PcmChannel::keyOn(uint8 note, uint8 velo, TownsAudio_WaveTable *w) {
|
||||
setupLoop(w->loopStart, w->loopLen);
|
||||
setNote(note, w, _reserved);
|
||||
setVelo(velo);
|
||||
|
||||
if (_reserved)
|
||||
_activeEffect = true;
|
||||
else
|
||||
_keyPressed = _activeKey = true;
|
||||
|
||||
_activeOutput = true;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::keyOff() {
|
||||
_keyPressed = false;
|
||||
envRelease();
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::updateEnvelopeGenerator() {
|
||||
if (!_envCurrentLevel) {
|
||||
_activeKey = false;
|
||||
_envState = kEnvReady;
|
||||
}
|
||||
|
||||
if (!_activeKey)
|
||||
return;
|
||||
|
||||
switch (_envState) {
|
||||
case kEnvAttacking:
|
||||
if (((_envCurrentLevel + _envStep) >> 8) > _envTotalLevel) {
|
||||
envDecay();
|
||||
return;
|
||||
} else {
|
||||
_envCurrentLevel += _envStep;
|
||||
}
|
||||
break;
|
||||
|
||||
case kEnvDecaying:
|
||||
if (((_envCurrentLevel - _envStep) >> 8) < _envSustainLevel) {
|
||||
envSustain();
|
||||
return;
|
||||
} else {
|
||||
_envCurrentLevel -= _envStep;
|
||||
}
|
||||
break;
|
||||
|
||||
case kEnvSustaining:
|
||||
case kEnvReleasing:
|
||||
_envCurrentLevel -= _envStep;
|
||||
if (_envCurrentLevel <= 0)
|
||||
_envCurrentLevel = 0;
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
_tl = (_envCurrentLevel >> 8) << 1;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::setInstrument(uint8 *instr) {
|
||||
_curInstrument = instr;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::setLevel(uint8 lvl) {
|
||||
if (_reserved) {
|
||||
_velo = lvl;
|
||||
_tl = lvl << 1;
|
||||
} else {
|
||||
int32 t = _envStep * lvl;
|
||||
if (_level)
|
||||
t /= _level;
|
||||
_envStep = t;
|
||||
t = _envCurrentLevel * lvl;
|
||||
if (_level)
|
||||
t /= _level;
|
||||
_envCurrentLevel = t;
|
||||
_level = lvl;
|
||||
_tl = _envCurrentLevel >> 8;
|
||||
}
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::setPitch(uint32 pt) {
|
||||
_stepPitch = pt & 0xffff;
|
||||
_step = (_stepNote * _stepPitch) >> 14;
|
||||
|
||||
// if (_pcmChanUnkFlag & _chanFlags[chan])
|
||||
// unk[chan] = (((p->step * 1000) << 11) / 98) / 20833;
|
||||
|
||||
/*else*/
|
||||
if (_activeEffect && (_step > 2048))
|
||||
_step = 2048;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::setBalance(uint8 blc) {
|
||||
_panLeft = blc & 0x0f;
|
||||
_panRight = blc >> 4;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::updateOutput() {
|
||||
if (_activeKey || _activeEffect) {
|
||||
_pos += _step;
|
||||
|
||||
if (&_data[_pos >> 11] >= _loopEnd) {
|
||||
if (_loopLen) {
|
||||
_pos -= _loopLen;
|
||||
} else {
|
||||
_pos = 0;
|
||||
_activeKey = _activeEffect = false;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int32 TownsAudio_PcmChannel::currentSampleLeft() {
|
||||
return (_activeOutput && _panLeft) ? (((_data[_pos >> 11] * _tl) * _panLeft) >> 3) : 0;
|
||||
}
|
||||
|
||||
int32 TownsAudio_PcmChannel::currentSampleRight() {
|
||||
return (_activeOutput && _panRight) ? (((_data[_pos >> 11] * _tl) * _panRight) >> 3) : 0;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::setupLoop(uint32 loopStart, uint32 len) {
|
||||
_loopLen = len << 11;
|
||||
_loopEnd = _loopLen ? &_data[(loopStart + _loopLen) >> 11] : _dataEnd;
|
||||
_pos = loopStart;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::setNote(uint8 note, TownsAudio_WaveTable *w, bool stepLimit) {
|
||||
_note = note;
|
||||
int8 diff = _note - w->baseNote;
|
||||
uint16 r = w->rate + w->rateOffs;
|
||||
uint16 bl = 0;
|
||||
uint32 s = 0;
|
||||
|
||||
if (diff < 0) {
|
||||
diff *= -1;
|
||||
bl = diff % 12;
|
||||
diff /= 12;
|
||||
s = (r >> diff);
|
||||
if (bl)
|
||||
s = (s * _pcmPhase2[bl]) >> 16;
|
||||
|
||||
} else if (diff > 0) {
|
||||
bl = diff % 12;
|
||||
diff /= 12;
|
||||
s = (r << diff);
|
||||
if (bl)
|
||||
s += ((s * _pcmPhase1[bl]) >> 16);
|
||||
|
||||
} else {
|
||||
s = r;
|
||||
}
|
||||
|
||||
_stepNote = s & 0xffff;
|
||||
_step = (s * _stepPitch) >> 14;
|
||||
|
||||
if (stepLimit && _step > 2048)
|
||||
_step = 2048;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::setVelo(uint8 velo) {
|
||||
if (_reserved) {
|
||||
_velo = velo;
|
||||
_tl = velo << 1;
|
||||
} else {
|
||||
_velo = velo;
|
||||
uint32 lvl = _level * _velo;
|
||||
_envTotalLevel = ((_envTotalLevel * lvl) >> 14) & 0xff;
|
||||
_envSustainLevel = ((_envSustainLevel * lvl) >> 14) & 0xff;
|
||||
envAttack();
|
||||
_tl = (_envCurrentLevel >> 8) << 1;
|
||||
}
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::envAttack() {
|
||||
envState = kEnvAttacking;
|
||||
int16 t = envTotalLevel << 8;
|
||||
if (envAttackRate == 127) {
|
||||
envStep = 0;
|
||||
} else if (envAttackRate) {
|
||||
envStep = t / envAttackRate;
|
||||
envCurrentLevel = 1;
|
||||
_envState = kEnvAttacking;
|
||||
int16 t = _envTotalLevel << 8;
|
||||
if (_envAttackRate == 127) {
|
||||
_envStep = 0;
|
||||
} else if (_envAttackRate) {
|
||||
_envStep = t / _envAttackRate;
|
||||
_envCurrentLevel = 1;
|
||||
} else {
|
||||
envCurrentLevel = t;
|
||||
_envCurrentLevel = t;
|
||||
envDecay();
|
||||
}
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::envDecay() {
|
||||
envState = kEnvDecaying;
|
||||
int16 t = envTotalLevel - envSustainLevel;
|
||||
if (t < 0 || envDecayRate == 127) {
|
||||
envStep = 0;
|
||||
} else if (envDecayRate) {
|
||||
envStep = (t << 8) / envDecayRate;
|
||||
_envState = kEnvDecaying;
|
||||
int16 t = _envTotalLevel - _envSustainLevel;
|
||||
if (t < 0 || _envDecayRate == 127) {
|
||||
_envStep = 0;
|
||||
} else if (_envDecayRate) {
|
||||
_envStep = (t << 8) / _envDecayRate;
|
||||
} else {
|
||||
envCurrentLevel = envSustainLevel << 8;
|
||||
_envCurrentLevel = _envSustainLevel << 8;
|
||||
envSustain();
|
||||
}
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::envSustain() {
|
||||
envState = kEnvSustaining;
|
||||
if (envSustainLevel && envSustainRate)
|
||||
envStep = (envSustainRate == 127) ? 0 : (envCurrentLevel / envSustainRate) >> 1;
|
||||
_envState = kEnvSustaining;
|
||||
if (_envSustainLevel && _envSustainRate)
|
||||
_envStep = (_envSustainRate == 127) ? 0 : (_envCurrentLevel / _envSustainRate) >> 1;
|
||||
else
|
||||
envStep = envCurrentLevel = 1;
|
||||
_envStep = _envCurrentLevel = 1;
|
||||
}
|
||||
|
||||
void TownsAudio_PcmChannel::envRelease() {
|
||||
envState = kEnvReleasing;
|
||||
if (envReleaseRate == 127)
|
||||
envStep = 0;
|
||||
else if (envReleaseRate)
|
||||
envStep = envCurrentLevel / envReleaseRate;
|
||||
_envState = kEnvReleasing;
|
||||
if (_envReleaseRate == 127)
|
||||
_envStep = 0;
|
||||
else if (_envReleaseRate)
|
||||
_envStep = _envCurrentLevel / _envReleaseRate;
|
||||
else
|
||||
envStep = envCurrentLevel = 1;
|
||||
_envStep = _envCurrentLevel = 1;
|
||||
}
|
||||
|
||||
const uint16 TownsAudio_PcmChannel::_pcmPhase1[] = {
|
||||
0x879B, 0x0F37, 0x1F58, 0x306E, 0x4288, 0x55B6, 0x6A08, 0x7F8F, 0x965E, 0xAE88, 0xC882, 0xE341
|
||||
};
|
||||
|
||||
const uint16 TownsAudio_PcmChannel::_pcmPhase2[] = {
|
||||
0xFEFE, 0xF1A0, 0xE411, 0xD744, 0xCB2F, 0xBFC7, 0xB504, 0xAAE2, 0xA144, 0x9827, 0x8FAC
|
||||
};
|
||||
|
||||
TownsAudio_WaveTable::TownsAudio_WaveTable() {
|
||||
data = 0;
|
||||
clear();
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user