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Diffstat (limited to 'trunk/src/emu/sound/ymdeltat.h')
-rw-r--r-- | trunk/src/emu/sound/ymdeltat.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/trunk/src/emu/sound/ymdeltat.h b/trunk/src/emu/sound/ymdeltat.h new file mode 100644 index 00000000000..6806a531f83 --- /dev/null +++ b/trunk/src/emu/sound/ymdeltat.h @@ -0,0 +1,84 @@ +#pragma once + +#ifndef __YMDELTAT_H__ +#define __YMDELTAT_H__ + +#define YM_DELTAT_SHIFT (16) + +#define YM_DELTAT_EMULATION_MODE_NORMAL 0 +#define YM_DELTAT_EMULATION_MODE_YM2610 1 + + +typedef void (*STATUS_CHANGE_HANDLER)(void *chip, UINT8 status_bits); + + +/* DELTA-T (adpcm type B) struct */ +typedef struct deltat_adpcm_state { /* AT: rearranged and tigntened structure */ + UINT8 *memory; + INT32 *output_pointer;/* pointer of output pointers */ + INT32 *pan; /* pan : &output_pointer[pan] */ + double freqbase; +#if 0 + double write_time; /* Y8950: 10 cycles of main clock; YM2608: 20 cycles of main clock */ + double read_time; /* Y8950: 8 cycles of main clock; YM2608: 18 cycles of main clock */ +#endif + UINT32 memory_size; + int output_range; + UINT32 now_addr; /* current address */ + UINT32 now_step; /* currect step */ + UINT32 step; /* step */ + UINT32 start; /* start address */ + UINT32 limit; /* limit address */ + UINT32 end; /* end address */ + UINT32 delta; /* delta scale */ + INT32 volume; /* current volume */ + INT32 acc; /* shift Measurement value*/ + INT32 adpcmd; /* next Forecast */ + INT32 adpcml; /* current value */ + INT32 prev_acc; /* leveling value */ + UINT8 now_data; /* current rom data */ + UINT8 CPU_data; /* current data from reg 08 */ + UINT8 portstate; /* port status */ + UINT8 control2; /* control reg: SAMPLE, DA/AD, RAM TYPE (x8bit / x1bit), ROM/RAM */ + UINT8 portshift; /* address bits shift-left: + ** 8 for YM2610, + ** 5 for Y8950 and YM2608 */ + + UINT8 DRAMportshift; /* address bits shift-right: + ** 0 for ROM and x8bit DRAMs, + ** 3 for x1 DRAMs */ + + UINT8 memread; /* needed for reading/writing external memory */ + + /* handlers and parameters for the status flags support */ + STATUS_CHANGE_HANDLER status_set_handler; + STATUS_CHANGE_HANDLER status_reset_handler; + + /* note that different chips have these flags on different + ** bits of the status register + */ + void * status_change_which_chip; /* this chip id */ + UINT8 status_change_EOS_bit; /* 1 on End Of Sample (record/playback/cycle time of AD/DA converting has passed)*/ + UINT8 status_change_BRDY_bit; /* 1 after recording 2 datas (2x4bits) or after reading/writing 1 data */ + UINT8 status_change_ZERO_bit; /* 1 if silence lasts for more than 290 miliseconds on ADPCM recording */ + + /* neither Y8950 nor YM2608 can generate IRQ when PCMBSY bit changes, so instead of above, + ** the statusflag gets ORed with PCM_BSY (below) (on each read of statusflag of Y8950 and YM2608) + */ + UINT8 PCM_BSY; /* 1 when ADPCM is playing; Y8950/YM2608 only */ + + UINT8 reg[16]; /* adpcm registers */ + UINT8 emulation_mode; /* which chip we're emulating */ +}YM_DELTAT; + +/*void YM_DELTAT_BRDY_callback(YM_DELTAT *DELTAT);*/ + +UINT8 YM_DELTAT_ADPCM_Read(YM_DELTAT *DELTAT); +void YM_DELTAT_ADPCM_Write(YM_DELTAT *DELTAT,int r,int v); +void YM_DELTAT_ADPCM_Reset(YM_DELTAT *DELTAT,int pan,int emulation_mode); +void YM_DELTAT_ADPCM_CALC(YM_DELTAT *DELTAT); + +void YM_DELTAT_postload(YM_DELTAT *DELTAT,UINT8 *regs); +void YM_DELTAT_savestate(device_t *device,YM_DELTAT *DELTAT); + +#endif /* __YMDELTAT_H__ */ |