mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
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206 lines
6.2 KiB
C
206 lines
6.2 KiB
C
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/*
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File: fm.h -- header file for software emulation for FM sound generator
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*/
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#ifndef _H_FM_FM_
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#define _H_FM_FM_
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#define HAS_YM2612 1
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#include "shared.h"
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/* --- select emulation chips --- */
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#define BUILD_YM2203 (HAS_YM2203) /* build YM2203(OPN) emulator */
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#define BUILD_YM2608 (HAS_YM2608) /* build YM2608(OPNA) emulator */
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#define BUILD_YM2610 (HAS_YM2610) /* build YM2610(OPNB) emulator */
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#define BUILD_YM2610B (HAS_YM2610B) /* build YM2610B(OPNB?)emulator */
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#define BUILD_YM2612 (HAS_YM2612 || HAS_YM3438) /* build YM2612(OPN2) emulator */
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/* select bit size of output : 8 or 16 */
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#define FM_SAMPLE_BITS 16
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/* select timer system internal or external */
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#define FM_INTERNAL_TIMER 0
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/* --- speedup optimize --- */
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/* busy flag enulation , The definition of FM_GET_TIME_NOW() is necessary. */
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#define FM_BUSY_FLAG_SUPPORT 0
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/* --- external SSG(YM2149/AY-3-8910)emulator interface port */
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/* used by YM2203,YM2608,and YM2610 */
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struct ssg_callbacks
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{
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void (*set_clock)(void *param, int clock);
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void (*write)(void *param, int address, int data);
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int (*read)(void *param);
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void (*reset)(void *param);
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};
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/* --- external callback funstions for realtime update --- */
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/* for busy flag emulation , function FM_GET_TIME_NOW() should */
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/* return present time in seconds with "double" precision */
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/* in timer.c */
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#define FM_GET_TIME_NOW() timer_get_time()
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#if BUILD_YM2203
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/* in 2203intf.c */
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void YM2203UpdateRequest(void *param);
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#define YM2203UpdateReq(chip) YM2203UpdateRequest(chip)
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#endif
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#if BUILD_YM2608
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/* in 2608intf.c */
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void YM2608UpdateRequest(void *param);
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#define YM2608UpdateReq(chip) YM2608UpdateRequest(chip);
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#endif
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#if BUILD_YM2610
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/* in 2610intf.c */
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void YM2610UpdateRequest(void *param);
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#define YM2610UpdateReq(chip) YM2610UpdateRequest(chip);
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#endif
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#if BUILD_YM2612
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/* in 2612intf.c */
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void YM2612UpdateRequest(void *param);
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#define YM2612UpdateReq(chip) YM2612UpdateRequest(chip);
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#endif
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/* compiler dependence */
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#if 0
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#ifndef OSD_CPU_H
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#define OSD_CPU_H
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typedef unsigned char UINT8; /* unsigned 8bit */
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typedef unsigned short UINT16; /* unsigned 16bit */
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typedef unsigned int UINT32; /* unsigned 32bit */
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typedef signed char INT8; /* signed 8bit */
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typedef signed short INT16; /* signed 16bit */
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typedef signed int INT32; /* signed 32bit */
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#endif
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#endif
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#ifndef INLINE
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#define INLINE static __inline__
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#endif
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typedef INT16 FMSAMPLE;
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/*
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#if (FM_SAMPLE_BITS==16)
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typedef INT16 FMSAMPLE;
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#endif
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#if (FM_SAMPLE_BITS==8)
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typedef unsigned char FMSAMPLE;
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#endif
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*/
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typedef void (*FM_TIMERHANDLER)(void *param,int c,int cnt,double stepTime);
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typedef void (*FM_IRQHANDLER)(void *param,int irq);
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/* FM_TIMERHANDLER : Stop or Start timer */
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/* int n = chip number */
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/* int c = Channel 0=TimerA,1=TimerB */
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/* int count = timer count (0=stop) */
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/* doube stepTime = step time of one count (sec.)*/
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/* FM_IRQHHANDLER : IRQ level changing sense */
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/* int n = chip number */
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/* int irq = IRQ level 0=OFF,1=ON */
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#if BUILD_YM2203
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/* -------------------- YM2203(OPN) Interface -------------------- */
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/*
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** Initialize YM2203 emulator(s).
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**
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** 'num' is the number of virtual YM2203's to allocate
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** 'baseclock'
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** 'rate' is sampling rate
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** 'TimerHandler' timer callback handler when timer start and clear
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** 'IRQHandler' IRQ callback handler when changed IRQ level
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** return 0 = success
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*/
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void * YM2203Init(void *param, int index, int baseclock, int rate,
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FM_TIMERHANDLER TimerHandler,FM_IRQHANDLER IRQHandler, const struct ssg_callbacks *ssg);
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/*
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** shutdown the YM2203 emulators
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*/
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void YM2203Shutdown(void *chip);
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/*
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** reset all chip registers for YM2203 number 'num'
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*/
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void YM2203ResetChip(void *chip);
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/*
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** update one of chip
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*/
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void YM2203UpdateOne(void *chip, FMSAMPLE *buffer, int length);
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/*
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** Write
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** return : InterruptLevel
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*/
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int YM2203Write(void *chip,int a,unsigned char v);
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/*
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** Read
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** return : InterruptLevel
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*/
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unsigned char YM2203Read(void *chip,int a);
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/*
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** Timer OverFlow
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*/
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int YM2203TimerOver(void *chip, int c);
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/*
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** State Save
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*/
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void YM2203Postload(void *chip);
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#endif /* BUILD_YM2203 */
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#if BUILD_YM2608
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/* -------------------- YM2608(OPNA) Interface -------------------- */
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void * YM2608Init(void *param, int index, int baseclock, int rate,
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void *pcmroma,int pcmsizea,
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FM_TIMERHANDLER TimerHandler,FM_IRQHANDLER IRQHandler, const struct ssg_callbacks *ssg);
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void YM2608Shutdown(void *chip);
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void YM2608ResetChip(void *chip);
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void YM2608UpdateOne(void *chip, FMSAMPLE **buffer, int length);
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int YM2608Write(void *chip, int a,unsigned char v);
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unsigned char YM2608Read(void *chip,int a);
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int YM2608TimerOver(void *chip, int c );
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void YM2608Postload(void *chip);
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#endif /* BUILD_YM2608 */
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#if (BUILD_YM2610||BUILD_YM2610B)
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/* -------------------- YM2610(OPNB) Interface -------------------- */
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void * YM2610Init(void *param, int index, int baseclock, int rate,
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void *pcmroma,int pcmasize,void *pcmromb,int pcmbsize,
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FM_TIMERHANDLER TimerHandler,FM_IRQHANDLER IRQHandler, const struct ssg_callbacks *ssg);
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void YM2610Shutdown(void *chip);
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void YM2610ResetChip(void *chip);
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void YM2610UpdateOne(void *chip, FMSAMPLE **buffer, int length);
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#if BUILD_YM2610B
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void YM2610BUpdateOne(void *chip, FMSAMPLE **buffer, int length);
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#endif
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int YM2610Write(void *chip, int a,unsigned char v);
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unsigned char YM2610Read(void *chip,int a);
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int YM2610TimerOver(void *chip, int c );
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void YM2610Postload(void *chip);
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#endif /* BUILD_YM2610 */
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#if BUILD_YM2612
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void * YM2612Init(void *param, int index, int baseclock, int rate,
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FM_TIMERHANDLER TimerHandler,FM_IRQHANDLER IRQHandler);
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void YM2612Shutdown(void *chip);
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void YM2612ResetChip(void *chip);
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void YM2612UpdateOne(void *chip, FMSAMPLE **buffer, int length);
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int YM2612Write(void *chip, int a,unsigned char v);
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unsigned char YM2612Read(void *chip,int a);
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int YM2612TimerOver(void *chip, int c );
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void YM2612Postload(void *chip);
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#endif /* BUILD_YM2612 */
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#endif /* _H_FM_FM_ */
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