diff options
Diffstat (limited to 'sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.cpp')
-rw-r--r-- | sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.cpp | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.cpp b/sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.cpp index 65014f6201..7a91cb81b9 100644 --- a/sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.cpp +++ b/sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.cpp @@ -26,6 +26,96 @@ #include "sound/softsynth/fmtowns_pc98/towns_pc98_fmsynth.h" #include "common/endian.h" +class TownsPC98_FmSynthOperator { +public: + TownsPC98_FmSynthOperator(const uint32 timerbase, const uint8 *rateTable, + const uint8 *shiftTable, const uint8 *attackDecayTable, const uint32 *frqTable, + const uint32 *sineTable, const int32 *tlevelOut, const int32 *detuneTable); + ~TownsPC98_FmSynthOperator() {} + + void keyOn(); + void keyOff(); + void frequency(int freq); + void updatePhaseIncrement(); + void recalculateRates(); + void generateOutput(int32 phasebuf, int32 *feedbuf, int32 &out); + + void feedbackLevel(int32 level) { + _feedbackLevel = level ? level + 6 : 0; + } + void detune(int value) { + _detn = &_detnTbl[value << 5]; + } + void multiple(uint32 value) { + _multiple = value ? (value << 1) : 1; + } + void attackRate(uint32 value) { + _specifiedAttackRate = value; + } + bool scaleRate(uint8 value); + void decayRate(uint32 value) { + _specifiedDecayRate = value; + recalculateRates(); + } + void sustainRate(uint32 value) { + _specifiedSustainRate = value; + recalculateRates(); + } + void sustainLevel(uint32 value) { + _sustainLevel = (value == 0x0f) ? 0x3e0 : value << 5; + } + void releaseRate(uint32 value) { + _specifiedReleaseRate = value; + recalculateRates(); + } + void totalLevel(uint32 value) { + _totalLevel = value << 3; + } + void ampModulation(bool enable) { + _ampMod = enable; + } + void reset(); + +protected: + EnvelopeState _state; + bool _playing; + uint32 _feedbackLevel; + uint32 _multiple; + uint32 _totalLevel; + uint8 _keyScale1; + uint8 _keyScale2; + uint32 _specifiedAttackRate; + uint32 _specifiedDecayRate; + uint32 _specifiedSustainRate; + uint32 _specifiedReleaseRate; + uint32 _tickCount; + uint32 _sustainLevel; + + bool _ampMod; + uint32 _frequency; + uint8 _kcode; + uint32 _phase; + uint32 _phaseIncrement; + const int32 *_detn; + + const uint8 *_rateTbl; + const uint8 *_rshiftTbl; + const uint8 *_adTbl; + const uint32 *_fTbl; + const uint32 *_sinTbl; + const int32 *_tLvlTbl; + const int32 *_detnTbl; + + const uint32 _tickLength; + uint32 _timer; + int32 _currentLevel; + + struct EvpState { + uint8 rate; + uint8 shift; + } fs_a, fs_d, fs_s, fs_r; +}; + TownsPC98_FmSynthOperator::TownsPC98_FmSynthOperator(const uint32 timerbase, const uint8 *rateTable, const uint8 *shiftTable, const uint8 *attackDecayTable, const uint32 *frqTable, const uint32 *sineTable, const int32 *tlevelOut, const int32 *detuneTable) : @@ -1409,3 +1499,12 @@ const uint8 TownsPC98_FmSynth::_percussionData[] = { 45, 136, 18, 144, 105, 138, 1, 160, 14, 128, 132, 145, 186, 37, 138, 41, 192, 48, 145, 46, 160, 33, 44, 24, 225, 16, 13, 132, 136, 137, 16, 148, 25, 170, 194, 82, 152, 136, 91, 24, 42, 169, 33, 233, 131, 179, 24, 185, 149, 16, 57, 172, 164, 18, 10, 211, 160, 147, 211, 33, 138, 243, 129, 16, 41, 193, 0, 43, 132, 155, 73, 58, 145, 244, 145, 43, 35, 9, 171, 16, 110, 25, 8, 28, 74, 162, 128, 26, 27, 82, 45, 136, 153, 18, 8, 136, 8 }; + +TownsPC98_FmSynth::ChanInternal::ChanInternal() { + memset(this, 0, sizeof(ChanInternal)); +} + +TownsPC98_FmSynth::ChanInternal::~ChanInternal() { + for (uint i = 0; i < ARRAYSIZE(opr); ++i) + delete opr[i]; +} |