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#pragma once
#ifndef __YMDELTAT_H__
#define __YMDELTAT_H__
/* compiler dependence */
#ifndef __OSDCOMM_H__
#define __OSDCOMM_H__
typedef unsigned char UINT8; /* unsigned 8bit */
typedef unsigned short UINT16; /* unsigned 16bit */
typedef unsigned int UINT32; /* unsigned 32bit */
typedef signed char INT8; /* signed 8bit */
typedef signed short INT16; /* signed 16bit */
typedef signed int INT32; /* signed 32bit */
typedef INT32 stream_sample_t;
#endif /* __OSDCOMM_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(const device_config *device,YM_DELTAT *DELTAT);*/
#endif /* __YMDELTAT_H__ */
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