/* header file for software emulation for FM sound generator */ #ifndef _H_FM_FM_ #define _H_FM_FM_ /* compiler dependence */ #include "../pico_types.h" #ifndef UINT8 typedef u8 UINT8; /* unsigned 8bit */ typedef u16 UINT16; /* unsigned 16bit */ typedef u32 UINT32; /* unsigned 32bit */ #endif #ifndef INT8 typedef s8 INT8; /* signed 8bit */ typedef s16 INT16; /* signed 16bit */ typedef s32 INT32; /* signed 32bit */ #endif #if 1 /* struct describing a single operator (SLOT) */ typedef struct { INT32 *DT; /* #0x00 detune :dt_tab[DT] */ UINT8 ar; /* #0x04 attack rate */ UINT8 d1r; /* #0x05 decay rate */ UINT8 d2r; /* #0x06 sustain rate */ UINT8 rr; /* #0x07 release rate */ UINT32 mul; /* #0x08 multiple :ML_TABLE[ML] */ /* Phase Generator */ UINT32 phase; /* #0x0c phase counter | need_save */ UINT32 Incr; /* #0x10 phase step */ UINT8 KSR; /* #0x14 key scale rate :3-KSR */ UINT8 ksr; /* #0x15 key scale rate :kcode>>(3-KSR) */ UINT8 key; /* #0x16 0=last key was KEY OFF, 1=KEY ON */ /* Envelope Generator */ UINT8 state; /* #0x17 phase type: EG_OFF=0, EG_REL, EG_SUS, EG_DEC, EG_ATT | need_save */ UINT16 tl; /* #0x18 total level: TL << 3 */ INT16 volume; /* #0x1a envelope counter | need_save */ UINT32 sl; /* #0x1c sustain level:sl_table[SL] */ /* asm relies on this order: */ union { struct { UINT32 eg_pack_rr; /* #0x20 1 (release state) */ UINT32 eg_pack_d2r; /* #0x24 2 (sustain state) */ UINT32 eg_pack_d1r; /* #0x28 3 (decay state) */ UINT32 eg_pack_ar; /* #0x2c 4 (attack state) */ }; UINT32 eg_pack[4]; }; UINT8 ssg; /* 0x30 SSG-EG waveform */ UINT8 ssgn; UINT16 ar_ksr; /* 0x32 ar+ksr */ UINT16 vol_out; /* 0x34 current output from EG (without LFO) */ UINT16 vol_ipol; /* 0x36 interpolator memory */ } FM_SLOT; typedef struct { FM_SLOT SLOT[4]; /* four SLOTs (operators) */ UINT8 ALGO; /* +00 algorithm */ UINT8 FB; /* feedback shift */ UINT8 pad[2]; INT32 op1_out; /* op1 output for feedback */ INT32 mem_value; /* +08 delayed sample (MEM) value */ INT32 pms; /* channel PMS */ UINT8 ams; /* channel AMS */ UINT8 kcode; /* +11 key code: */ UINT8 fn_h; /* freq latch */ UINT8 pad2; UINT32 fc; /* fnum,blk:adjusted to sample rate */ UINT32 block_fnum; /* current blk/fnum value for this slot (can be different betweeen slots of one channel in 3slot mode) */ /* LFO */ UINT8 AMmasks; /* AM enable flag */ UINT8 pad3[3]; } FM_CH; typedef struct { int clock; /* master clock (Hz) */ int rate; /* sampling rate (Hz) */ double freqbase; /* 08 frequency base */ UINT8 address; /* 10 address register | need_save */ UINT8 status; /* 11 status flag | need_save */ UINT8 mode; /* mode CSM / 3SLOT */ UINT8 flags; /* operational flags */ int TA; /* timer a */ int TAC; /* timer a maxval */ int TAT; /* timer a ticker | need_save */ UINT8 TB; /* timer b */ UINT8 pad2[3]; int TBC; /* timer b maxval */ int TBT; /* timer b ticker | need_save */ /* local time tables */ INT32 dt_tab[8][32];/* DeTune table */ } FM_ST; #define ST_SSG 1 #define ST_DAC 2 /***********************************************************/ /* OPN unit */ /***********************************************************/ /* OPN 3slot struct */ typedef struct { UINT32 fc[3]; /* fnum3,blk3: calculated */ UINT8 fn_h; /* freq3 latch */ UINT8 kcode[3]; /* key code */ UINT32 block_fnum[3]; /* current fnum value for this slot (can be different betweeen slots of one channel in 3slot mode) */ } FM_3SLOT; /* OPN/A/B common state */ typedef struct { FM_ST ST; /* general state */ FM_3SLOT SL3; /* 3 slot mode state */ UINT32 pan; /* fm channels output mask (bit 1 = enable) */ UINT32 eg_cnt; /* global envelope generator counter | need_save */ UINT32 eg_timer; /* global envelope generator counter works at frequency = chipclock/64/3 | need_save */ UINT32 eg_timer_add; /* step of eg_timer */ /* LFO */ UINT32 lfo_cnt; /* need_save */ UINT32 lfo_inc; UINT32 lfo_freq[8]; /* LFO FREQ table */ } FM_OPN; /* here's the virtual YM2612 */ typedef struct { UINT8 REGS[0x200]; /* registers (for save states) */ INT32 addr_A1; /* address line A1 | need_save */ FM_CH CH[6]; /* channel state */ /* dac output (YM2612) */ int dacen; INT32 dacout; FM_OPN OPN; /* OPN state */ UINT32 slot_mask; /* active slot mask (performance hack) */ UINT32 ssg_mask; /* active ssg mask (performance hack) */ } YM2612; #endif #ifndef EXTERNAL_YM2612 extern YM2612 ym2612; #endif void YM2612Init_(int baseclock, int rate, int flags); void YM2612ResetChip_(void); int YM2612UpdateOne_(int *buffer, int length, int stereo, int is_buf_empty); int YM2612Write_(unsigned int a, unsigned int v); //unsigned char YM2612Read_(void); int YM2612PicoTick_(int n); void YM2612PicoStateLoad_(void); void *YM2612GetRegs(void); void YM2612PicoStateSave2(int tat, int tbt); int YM2612PicoStateLoad2(int *tat, int *tbt); #ifndef __GP2X__ #define YM2612Init YM2612Init_ #define YM2612ResetChip YM2612ResetChip_ #define YM2612UpdateOne YM2612UpdateOne_ #define YM2612PicoStateLoad YM2612PicoStateLoad_ #else /* GP2X specific */ #include #define YM2612Init(baseclock,rate,flags) do { \ if (PicoIn.opt&POPT_EXT_FM) YM2612Init_940(baseclock, rate, flags); \ else YM2612Init_(baseclock, rate, flags); \ } while (0) #define YM2612ResetChip() do { \ if (PicoIn.opt&POPT_EXT_FM) YM2612ResetChip_940(); \ else YM2612ResetChip_(); \ } while (0) #define YM2612UpdateOne(buffer,length,stereo,is_buf_empty) do { \ (PicoIn.opt&POPT_EXT_FM) ? YM2612UpdateOne_940(buffer, length, stereo, is_buf_empty) : \ YM2612UpdateOne_(buffer, length, stereo, is_buf_empty); \ } while (0) #define YM2612PicoStateLoad() do { \ if (PicoIn.opt&POPT_EXT_FM) YM2612PicoStateLoad_940(); \ else YM2612PicoStateLoad_(); \ } while (0) #endif /* __GP2X__ */ #endif /* _H_FM_FM_ */