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https://github.com/ZDoom/gzdoom-gles.git
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92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
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#ifndef __OPNA_H__
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#define __OPNA_H__
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#include <stdint.h>
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#include "op.h"
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#include "psg.h"
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/* YM2608 (OPNA) ------------------------------------------------------ */
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typedef struct _OPNA
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{
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int fmvolume;
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uint32_t clock;
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uint32_t rate;
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uint32_t psgrate;
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uint32_t status;
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Channel4 ch[6];
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Channel4* csmch;
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int32_t mixdelta;
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int mpratio;
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uint8_t interpolation;
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uint8_t timer_status;
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uint8_t regtc;
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uint8_t regta[2];
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int32_t timera, timera_count;
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int32_t timerb, timerb_count;
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int32_t timer_step;
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uint8_t prescale;
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uint8_t devmask;
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PSG psg;
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Rhythm rhythm[6];
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int8_t rhythmtl;
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int rhythmtvol;
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uint8_t rhythmkey;
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int32_t mixl, mixl1;
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int32_t mixr, mixr1;
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uint8_t fnum2[9];
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uint8_t reg22;
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uint32_t reg29;
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uint32_t statusnext;
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uint32_t lfocount;
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uint32_t lfodcount;
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uint32_t lfotab[8];
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uint32_t fnum[6];
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uint32_t fnum3[3];
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uint8_t aml;
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uint32_t currentratio;
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float rr;
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uint32_t ratetable[64];
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} OPNA;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* --------------------------------------------------------------------------- */
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uint8_t OPNAInit(OPNA *opna, uint32_t c, uint32_t r, uint8_t ipflag);
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void OPNAReset(OPNA *opna);
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void OPNASetVolumeRhythm(OPNA *opna, int index, int db);
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uint8_t OPNASetRate(OPNA *opna, uint32_t r, uint8_t ipflag);
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void OPNASetChannelMask(OPNA *opna, uint32_t mask);
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void OPNASetReg(OPNA *opna, uint32_t addr, uint32_t data);
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void OPNASetPan(OPNA *opna, uint32_t chan, uint32_t data);
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uint8_t OPNATimerCount(OPNA *opna, int32_t us);
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void OPNAMix(OPNA *opna, int16_t *buffer, uint32_t nframes);
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/* --------------------------------------------------------------------------- */
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static inline uint32_t OPNAReadStatus(OPNA *opna) { return opna->status & 0x03; }
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static inline int32_t OPNAGetNextEvent(OPNA *opna)
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{
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uint32_t ta = ((opna->timera_count + 0xffff) >> 16) - 1;
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uint32_t tb = ((opna->timerb_count + 0xfff) >> 12) - 1;
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return (ta < tb ? ta : tb) + 1;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* FM_OPNA_H */
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