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https://github.com/libretro/NP2kai.git
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89 lines
1.5 KiB
C
Executable File
89 lines
1.5 KiB
C
Executable File
/**
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* @file psggen.h
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* @brief Interface of the PSG
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*/
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#pragma once
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#include "sound.h"
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enum {
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PSGFREQPADBIT = 12,
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PSGADDEDBIT = 3
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};
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enum {
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PSGENV_INC = 15,
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PSGENV_ONESHOT = 16,
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PSGENV_LASTON = 32,
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PSGENV_ONECYCLE = 64
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};
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typedef struct {
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SINT32 freq;
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SINT32 count;
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SINT32 *pvol; // !!
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UINT16 puchi;
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UINT8 pan;
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UINT8 padding;
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} PSGTONE;
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typedef struct {
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UINT32 freq; /*!< frequency */
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UINT32 count; /*!< counter */
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UINT lfsr; /*!< linear feedback shift register */
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} PSGNOISE;
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typedef struct {
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UINT8 tune[3][2]; // 0
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UINT8 noise; // 6
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UINT8 mixer; // 7
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UINT8 vol[3]; // 8
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UINT8 envtime[2]; // b
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UINT8 env; // d
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UINT8 io1;
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UINT8 io2;
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} PSGREG;
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typedef struct {
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PSGTONE tone[3];
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PSGNOISE noise;
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PSGREG reg;
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UINT16 envcnt;
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UINT16 envmax;
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UINT8 mixer;
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UINT8 envmode;
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UINT8 envvol;
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SINT8 envvolcnt;
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SINT32 evol; // !!
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UINT puchicount;
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} _PSGGEN, *PSGGEN;
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typedef struct {
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SINT32 volume[16];
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SINT32 voltbl[16];
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UINT rate;
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UINT32 base;
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UINT16 puchidec;
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} PSGGENCFG;
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#ifdef __cplusplus
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extern "C" {
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#endif
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void psggen_initialize(UINT rate);
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void psggen_setvol(UINT vol);
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void psggen_reset(PSGGEN psg);
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void psggen_restore(PSGGEN psg);
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void psggen_setreg(PSGGEN psg, UINT reg, REG8 val);
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REG8 psggen_getreg(PSGGEN psg, UINT reg);
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void psggen_setpan(PSGGEN psg, UINT ch, REG8 pan);
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void SOUNDCALL psggen_getpcm(PSGGEN psg, SINT32 *pcm, UINT count);
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#ifdef __cplusplus
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}
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#endif
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