apps/codecs/libgme/ymdeltat.h

   1 #pragma once
   2
   3 #ifndef __YMDELTAT_H__
   4 #define __YMDELTAT_H__
   5
   6 #include "blargg_common.h"
   7
   8 /* compiler dependence */
   9 #ifndef __OSDCOMM_H__
  10 #define __OSDCOMM_H__
  11 typedef unsigned char   UINT8;   /* unsigned  8bit */
  12 typedef unsigned short  UINT16;  /* unsigned 16bit */
  13 typedef unsigned int    UINT32;  /* unsigned 32bit */
  14 typedef signed char             INT8;    /* signed  8bit   */
  15 typedef signed short    INT16;   /* signed 16bit   */
  16 typedef signed int              INT32;   /* signed 32bit   */
  17
  18 typedef INT32 stream_sample_t;
  19
  20 #endif /* __OSDCOMM_H__ */
  21
  22 #define YM_DELTAT_SHIFT    (16)
  23
  24 #define YM_DELTAT_EMULATION_MODE_NORMAL 0
  25 #define YM_DELTAT_EMULATION_MODE_YM2610 1
  26
  27
  28 typedef void (*STATUS_CHANGE_HANDLER)(void *chip, UINT8 status_bits);
  29
  30
  31 /* DELTA-T (adpcm type B) struct */
  32 typedef struct deltat_adpcm_state {     /* AT: rearranged and tigntened structure */
  33         UINT8   *memory;
  34         INT32   *output_pointer;/* pointer of output pointers   */
  35         INT32   *pan;                   /* pan : &output_pointer[pan]   */
  36         double  freqbase;
  37 #if 0
  38         double  write_time;             /* Y8950: 10 cycles of main clock; YM2608: 20 cycles of main clock */
  39         double  read_time;              /* Y8950: 8 cycles of main clock;  YM2608: 18 cycles of main clock */
  40 #endif
  41         UINT32  memory_size;
  42         int             output_range;
  43         UINT32  now_addr;               /* current address      */
  44         UINT32  now_step;               /* currect step         */
  45         UINT32  step;                   /* step                 */
  46         UINT32  start;                  /* start address        */
  47         UINT32  limit;                  /* limit address        */
  48         UINT32  end;                    /* end address          */
  49         UINT32  delta;                  /* delta scale          */
  50         INT32   volume;                 /* current volume       */
  51         INT32   acc;                    /* shift Measurement value*/
  52         INT32   adpcmd;                 /* next Forecast        */
  53         INT32   adpcml;                 /* current value        */
  54         INT32   prev_acc;               /* leveling value       */
  55         UINT8   now_data;               /* current rom data     */
  56         UINT8   CPU_data;               /* current data from reg 08 */
  57         UINT8   portstate;              /* port status          */
  58         UINT8   control2;               /* control reg: SAMPLE, DA/AD, RAM TYPE (x8bit / x1bit), ROM/RAM */
  59         UINT8   portshift;              /* address bits shift-left:
  60                             ** 8 for YM2610,
  61                             ** 5 for Y8950 and YM2608 */
  62
  63         UINT8   DRAMportshift;  /* address bits shift-right:
  64                             ** 0 for ROM and x8bit DRAMs,
  65                             ** 3 for x1 DRAMs */
  66
  67         UINT8   memread;                /* needed for reading/writing external memory */
  68
  69         /* handlers and parameters for the status flags support */
  70         STATUS_CHANGE_HANDLER   status_set_handler;
  71         STATUS_CHANGE_HANDLER   status_reset_handler;
  72
  73         /* note that different chips have these flags on different
  74     ** bits of the status register
  75     */
  76         void *  status_change_which_chip;       /* this chip id */
  77         UINT8   status_change_EOS_bit;          /* 1 on End Of Sample (record/playback/cycle time of AD/DA converting has passed)*/
  78         UINT8   status_change_BRDY_bit;         /* 1 after recording 2 datas (2x4bits) or after reading/writing 1 data */
  79         UINT8   status_change_ZERO_bit;         /* 1 if silence lasts for more than 290 miliseconds on ADPCM recording */
  80
  81         /* neither Y8950 nor YM2608 can generate IRQ when PCMBSY bit changes, so instead of above,
  82     ** the statusflag gets ORed with PCM_BSY (below) (on each read of statusflag of Y8950 and YM2608)
  83     */
  84         UINT8   PCM_BSY;                /* 1 when ADPCM is playing; Y8950/YM2608 only */
  85
  86         UINT8   reg[16];                /* adpcm registers      */
  87         UINT8   emulation_mode; /* which chip we're emulating */
  88 }YM_DELTAT;
  89
  90 /*void YM_DELTAT_BRDY_callback(YM_DELTAT *DELTAT);*/
  91
  92 UINT8 YM_DELTAT_ADPCM_Read(YM_DELTAT *DELTAT) ICODE_ATTR;
  93 void YM_DELTAT_ADPCM_Write(YM_DELTAT *DELTAT,int r,int v) ICODE_ATTR;
  94 void YM_DELTAT_ADPCM_Reset(YM_DELTAT *DELTAT,int pan,int emulation_mode);
  95 void YM_DELTAT_ADPCM_CALC(YM_DELTAT *DELTAT) ICODE_ATTR;
  96
  97 /*void YM_DELTAT_postload(YM_DELTAT *DELTAT,UINT8 *regs);
  98 void YM_DELTAT_savestate(const device_config *device,YM_DELTAT *DELTAT);*/
  99
 100 #endif /* __YMDELTAT_H__ */