1 #ifndef __YMDELTAT_H_ 2 #define __YMDELTAT_H_ 3 4 #define YM_DELTAT_SHIFT (16) 5 6 7 typedef void (*STATUS_CHANGE_HANDLER)(UINT8 which_chip, UINT8 status_bits); 8 9 10 /* DELTA-T (adpcm type B) struct */ 11 typedef struct deltat_adpcm_state { /* AT: rearranged and tigntened structure */ 12 UINT8 *memory; 13 INT32 *output_pointer;/* pointer of output pointers */ 14 INT32 *pan; /* pan : &output_pointer[pan] */ 15 double freqbase; 16 UINT32 memory_size; 17 int output_range; 18 UINT32 now_addr; /* current address */ 19 UINT32 now_step; /* currect step */ 20 UINT32 step; /* step */ 21 UINT32 start; /* start address */ 22 UINT32 limit; /* limit address */ 23 UINT32 end; /* end address */ 24 UINT32 delta; /* delta scale */ 25 INT32 volume; /* current volume */ 26 INT32 acc; /* shift Measurement value*/ 27 INT32 adpcmd; /* next Forecast */ 28 INT32 adpcml; /* current value */ 29 INT32 prev_acc; /* leveling value */ 30 UINT8 now_data; /* current rom data */ 31 UINT8 portstate; /* port status */ 32 UINT8 control2; /* control reg: SAMPLE, DA/AD, RAM TYPE (x8bit / x1bit), ROM/RAM */ 33 UINT8 portshift; /* address bits shift-left: 34 ** 8 for YM2610, 35 ** 5 for ROM for Y8950 and YM2608, 36 ** 5 for x8bit DRAMs for Y8950 and YM2608, 37 ** 2 for x1bit DRAMs for Y8950 and YM2608 */ 38 UINT8 DRAMportshift; /* address bits shift-right: 39 ** 0 for ROM and x8bit DRAMs, 40 ** 3 for x1 DRAMs */ 41 42 UINT8 memread; /* for dummy reading needed while reading external memory */ 43 44 /* handlers and parameters for the status flags support */ 45 STATUS_CHANGE_HANDLER status_set_handler; 46 STATUS_CHANGE_HANDLER status_reset_handler; 47 48 /* 49 ** note that different chips have these flags on different 50 ** bits of the status register 51 */ 52 UINT8 status_change_which_chip; /* this chip id */ 53 UINT8 status_change_EOS_bit; /* 1 on End Of Sample (record/playback/cycle time of AD/DA converting has passed)*/ 54 UINT8 status_change_BRDY_bit; /* 1 after recording 2 datas (2x4bits) or after reading/writing 1 data */ 55 UINT8 status_change_ZERO_bit; /* 1 if silence lasts for more than 290 miliseconds on ADPCM recording */ 56 57 /* neither Y8950 nor YM2608 can generate IRQ when PCMBSY bit changes, so instead of above method 58 the statusflag gets ORed with PCM_BSY (below) (on each read of statusflag of Y8950 and YM2608) 59 */ 60 UINT8 PCM_BSY; /* 1 when ADPCM is playing; Y8950/YM2608 only */ 61 62 UINT8 reg[16]; /* adpcm registers */ 63 }YM_DELTAT; 64 65 66 UINT8 YM_DELTAT_ADPCM_Read(YM_DELTAT *DELTAT); 67 void YM_DELTAT_ADPCM_Write(YM_DELTAT *DELTAT,int r,int v); 68 void YM_DELTAT_ADPCM_Reset(YM_DELTAT *DELTAT,int pan); 69 70 void YM_DELTAT_postload(YM_DELTAT *DELTAT,UINT8 *regs); 71 void YM_DELTAT_savestate(const char *statename,int num,YM_DELTAT *DELTAT); 72 73 74 #define YM_INLINE_BLOCK 75 #include "ymdeltat.c" /* include inline function section */ 76 #undef YM_INLINE_BLOCK 77 78 #endif 79