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Diffstat (limited to 'audio/softsynth/opl/mame.h')
-rw-r--r-- | audio/softsynth/opl/mame.h | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/audio/softsynth/opl/mame.h b/audio/softsynth/opl/mame.h new file mode 100644 index 0000000000..58ef5f18dc --- /dev/null +++ b/audio/softsynth/opl/mame.h @@ -0,0 +1,202 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * 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 General Public License for more details. + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * $URL$ + * $Id$ + * + * LGPL licensed version of MAMEs fmopl (V0.37a modified) by + * Tatsuyuki Satoh. Included from LGPL'ed AdPlug. + */ + + +#ifndef SOUND_SOFTSYNTH_OPL_MAME_H +#define SOUND_SOFTSYNTH_OPL_MAME_H + +#include "common/scummsys.h" +#include "common/util.h" +#include "common/random.h" + +#include "audio/fmopl.h" + +namespace OPL { +namespace MAME { + +enum { + FMOPL_ENV_BITS_HQ = 16, + FMOPL_ENV_BITS_MQ = 8, + FMOPL_ENV_BITS_LQ = 8, + FMOPL_EG_ENT_HQ = 4096, + FMOPL_EG_ENT_MQ = 1024, + FMOPL_EG_ENT_LQ = 128 +}; + + +typedef void (*OPL_TIMERHANDLER)(int channel,double interval_Sec); +typedef void (*OPL_IRQHANDLER)(int param,int irq); +typedef void (*OPL_UPDATEHANDLER)(int param,int min_interval_us); + +#define OPL_TYPE_WAVESEL 0x01 /* waveform select */ + +/* Saving is necessary for member of the 'R' mark for suspend/resume */ +/* ---------- OPL one of slot ---------- */ +typedef struct fm_opl_slot { + int TL; /* total level :TL << 8 */ + int TLL; /* adjusted now TL */ + uint8 KSR; /* key scale rate :(shift down bit) */ + int *AR; /* attack rate :&AR_TABLE[AR<<2] */ + int *DR; /* decay rate :&DR_TABLE[DR<<2] */ + int SL; /* sustain level :SL_TABLE[SL] */ + int *RR; /* release rate :&DR_TABLE[RR<<2] */ + uint8 ksl; /* keyscale level :(shift down bits) */ + uint8 ksr; /* key scale rate :kcode>>KSR */ + uint mul; /* multiple :ML_TABLE[ML] */ + uint Cnt; /* frequency count */ + uint Incr; /* frequency step */ + + /* envelope generator state */ + uint8 eg_typ;/* envelope type flag */ + uint8 evm; /* envelope phase */ + int evc; /* envelope counter */ + int eve; /* envelope counter end point */ + int evs; /* envelope counter step */ + int evsa; /* envelope step for AR :AR[ksr] */ + int evsd; /* envelope step for DR :DR[ksr] */ + int evsr; /* envelope step for RR :RR[ksr] */ + + /* LFO */ + uint8 ams; /* ams flag */ + uint8 vib; /* vibrate flag */ + /* wave selector */ + int **wavetable; +} OPL_SLOT; + +/* ---------- OPL one of channel ---------- */ +typedef struct fm_opl_channel { + OPL_SLOT SLOT[2]; + uint8 CON; /* connection type */ + uint8 FB; /* feed back :(shift down bit)*/ + int *connect1; /* slot1 output pointer */ + int *connect2; /* slot2 output pointer */ + int op1_out[2]; /* slot1 output for selfeedback */ + + /* phase generator state */ + uint block_fnum; /* block+fnum */ + uint8 kcode; /* key code : KeyScaleCode */ + uint fc; /* Freq. Increment base */ + uint ksl_base; /* KeyScaleLevel Base step */ + uint8 keyon; /* key on/off flag */ +} OPL_CH; + +/* OPL state */ +typedef struct fm_opl_f { + uint8 type; /* chip type */ + int clock; /* master clock (Hz) */ + int rate; /* sampling rate (Hz) */ + double freqbase; /* frequency base */ + double TimerBase; /* Timer base time (==sampling time) */ + uint8 address; /* address register */ + uint8 status; /* status flag */ + uint8 statusmask; /* status mask */ + uint mode; /* Reg.08 : CSM , notesel,etc. */ + + /* Timer */ + int T[2]; /* timer counter */ + uint8 st[2]; /* timer enable */ + + /* FM channel slots */ + OPL_CH *P_CH; /* pointer of CH */ + int max_ch; /* maximum channel */ + + /* Rythm sention */ + uint8 rythm; /* Rythm mode , key flag */ + + /* time tables */ + int AR_TABLE[76]; /* atttack rate tables */ + int DR_TABLE[76]; /* decay rate tables */ + uint FN_TABLE[1024];/* fnumber -> increment counter */ + + /* LFO */ + int *ams_table; + int *vib_table; + int amsCnt; + int amsIncr; + int vibCnt; + int vibIncr; + + /* wave selector enable flag */ + uint8 wavesel; + + /* external event callback handler */ + OPL_TIMERHANDLER TimerHandler; /* TIMER handler */ + int TimerParam; /* TIMER parameter */ + OPL_IRQHANDLER IRQHandler; /* IRQ handler */ + int IRQParam; /* IRQ parameter */ + OPL_UPDATEHANDLER UpdateHandler; /* stream update handler */ + int UpdateParam; /* stream update parameter */ + + Common::RandomSource rnd; +} FM_OPL; + +/* ---------- Generic interface section ---------- */ +#define OPL_TYPE_YM3526 (0) +#define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL) + +void OPLBuildTables(int ENV_BITS_PARAM, int EG_ENT_PARAM); + +FM_OPL *OPLCreate(int type, int clock, int rate); +void OPLDestroy(FM_OPL *OPL); +void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler, int channelOffset); +void OPLSetIRQHandler(FM_OPL *OPL, OPL_IRQHANDLER IRQHandler, int param); +void OPLSetUpdateHandler(FM_OPL *OPL, OPL_UPDATEHANDLER UpdateHandler, int param); + +void OPLResetChip(FM_OPL *OPL); +int OPLWrite(FM_OPL *OPL, int a, int v); +unsigned char OPLRead(FM_OPL *OPL, int a); +int OPLTimerOver(FM_OPL *OPL, int c); +void OPLWriteReg(FM_OPL *OPL, int r, int v); +void YM3812UpdateOne(FM_OPL *OPL, int16 *buffer, int length); + +// Factory method +FM_OPL *makeAdLibOPL(int rate); + +// OPL API implementation +class OPL : public ::OPL::OPL { +private: + FM_OPL *_opl; +public: + OPL() : _opl(0) {} + ~OPL(); + + bool init(int rate); + void reset(); + + void write(int a, int v); + byte read(int a); + + void writeReg(int r, int v); + + void readBuffer(int16 *buffer, int length); + bool isStereo() const { return false; } +}; + +} // End of namespace MAME +} // End of namespace OPL + +#endif |