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Diffstat (limited to 'engines/sci/sfx/softseq/fmopl.h')
| -rw-r--r-- | engines/sci/sfx/softseq/fmopl.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/engines/sci/sfx/softseq/fmopl.h b/engines/sci/sfx/softseq/fmopl.h new file mode 100644 index 0000000000..5bb1cd80d7 --- /dev/null +++ b/engines/sci/sfx/softseq/fmopl.h @@ -0,0 +1,168 @@ +/*************************************************************************** + fmopl.h Copyright (C) 1999-2000 Tatsuyuki Satoh + 2001-2004 The ScummVM project + 2002 Solomon Peachy + 2004 Walter van Niftrik + + This program may be modified and copied freely according to the terms of + the GNU general public license (GPL), as long as the above copyright + notice and the licensing information contained herein are preserved. + + Please refer to www.gnu.org for licensing details. + + This work is provided AS IS, without warranty of any kind, expressed or + implied, including but not limited to the warranties of merchantibility, + noninfringement, and fitness for a specific purpose. The author will not + be held liable for any damage caused by this work or derivatives of it. + + By using this source code, you agree to the licensing terms as stated + above. + + LGPL licensed version of MAMEs fmopl (V0.37a modified) by + Tatsuyuki Satoh. Included from LGPL'ed AdPlug. + +***************************************************************************/ + +#ifndef FMOPL_H_ +#define FMOPL_H_ + +#include <scitypes.h> + +#define TWELVE_VOICE 1 +#ifdef TWELVE_VOICE +#define ADLIB_VOICES 12 +#else +#define ADLIB_VOICES 9 +#endif + +enum { + FMOPL_ENV_BITS_HQ = 16, + FMOPL_ENV_BITS_LQ = 8, + FMOPL_EG_ENT_HQ = 4096, + 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 */ + guint8 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] */ + guint8 ksl; /* keyscale level :(shift down bits) */ + guint8 ksr; /* key scale rate :kcode>>KSR */ + guint32 mul; /* multiple :ML_TABLE[ML] */ + guint32 Cnt; /* frequency count */ + guint32 Incr; /* frequency step */ + + /* envelope generator state */ + guint8 eg_typ;/* envelope type flag */ + guint8 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 */ + guint8 ams; /* ams flag */ + guint8 vib; /* vibrate flag */ + /* wave selector */ + int **wavetable; +} OPL_SLOT; + +/* ---------- OPL one of channel ---------- */ +typedef struct fm_opl_channel { + OPL_SLOT SLOT[2]; + guint8 CON; /* connection type */ + guint8 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 */ + guint32 block_fnum; /* block+fnum */ + guint8 kcode; /* key code : KeyScaleCode */ + guint32 fc; /* Freq. Increment base */ + guint32 ksl_base; /* KeyScaleLevel Base step */ + guint8 keyon; /* key on/off flag */ +} OPL_CH; + +/* OPL state */ +typedef struct fm_opl_f { + guint8 type; /* chip type */ + int clock; /* master clock (Hz) */ + int rate; /* sampling rate (Hz) */ + double freqbase; /* frequency base */ + double TimerBase; /* Timer base time (==sampling time) */ + guint8 address; /* address register */ + guint8 status; /* status flag */ + guint8 statusmask; /* status mask */ + guint32 mode; /* Reg.08 : CSM , notesel,etc. */ + + /* Timer */ + int T[2]; /* timer counter */ + guint8 st[2]; /* timer enable */ + + /* FM channel slots */ + OPL_CH *P_CH; /* pointer of CH */ + int max_ch; /* maximum channel */ + + /* Rythm sention */ + guint8 rythm; /* Rythm mode , key flag */ + + /* time tables */ + int AR_TABLE[75]; /* atttack rate tables */ + int DR_TABLE[75]; /* decay rate tables */ + guint32 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 */ + guint8 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 */ +} 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, gint16 *buffer, int length, int interleave); +#endif |