Pico/cd/Area.c

   1 // This is part of Pico Library
   2
   3 // (c) Copyright 2006 notaz, All rights reserved.
   4 // Free for non-commercial use.
   5
   6 // For commercial use, separate licencing terms must be obtained.
   7
   8
   9 #include "../PicoInt.h"
  10
  11 // ym2612
  12 #include "../sound/ym2612.h"
  13
  14 // sn76496
  15 extern int *sn76496_regs;
  16
  17
  18 typedef enum {
  19         CHUNK_M68K = 1,
  20         CHUNK_RAM,
  21         CHUNK_VRAM,
  22         CHUNK_ZRAM,
  23         CHUNK_CRAM,     // 5
  24         CHUNK_VSRAM,
  25         CHUNK_MISC,
  26         CHUNK_VIDEO,
  27         CHUNK_Z80,
  28         CHUNK_PSG,      // 10
  29         CHUNK_FM,
  30         // CD stuff
  31         CHUNK_S68K,
  32         CHUNK_PRG_RAM,
  33         CHUNK_WORD_RAM,
  34         CHUNK_BRAM,     // 15
  35         CHUNK_GA_REGS,
  36         CHUNK_CDC,
  37         CHUNK_CDD,
  38         CHUNK_SCD,
  39         CHUNK_RC,       // 20
  40         CHUNK_MISC_CD,
  41 } chunk_name_e;
  42
  43
  44 static int write_chunk(chunk_name_e name, int len, void *data, void *file)
  45 {
  46         size_t bwritten = 0;
  47         bwritten += areaWrite(&name, 1, 1, file);
  48         bwritten += areaWrite(&len, 1, 4, file);
  49         bwritten += areaWrite(data, 1, len, file);
  50
  51         return (bwritten == len + 4 + 1);
  52 }
  53
  54
  55 #define CHECKED_WRITE(name,len,data) \
  56         if (!write_chunk(name, len, data, file)) return 1;
  57
  58 #define CHECKED_WRITE_BUFF(name,buff) \
  59         if (!write_chunk(name, sizeof(buff), &buff, file)) return 1;
  60
  61 int PicoCdSaveState(void *file)
  62 {
  63         unsigned char buff[0x60];
  64         void *ym2612_regs = YM2612GetRegs();
  65
  66         areaWrite("PicoSMCD", 1, 8, file);
  67         areaWrite(&PicoVer, 1, 4, file);
  68
  69         memset(buff, 0, sizeof(buff));
  70         PicoAreaPackCpu(buff, 0);
  71         CHECKED_WRITE_BUFF(CHUNK_M68K,  buff);
  72         CHECKED_WRITE_BUFF(CHUNK_RAM,   Pico.ram);
  73         CHECKED_WRITE_BUFF(CHUNK_VRAM,  Pico.vram);
  74         CHECKED_WRITE_BUFF(CHUNK_ZRAM,  Pico.zram);
  75         CHECKED_WRITE_BUFF(CHUNK_CRAM,  Pico.cram);
  76         CHECKED_WRITE_BUFF(CHUNK_VSRAM, Pico.vsram);
  77         CHECKED_WRITE_BUFF(CHUNK_MISC,  Pico.m);
  78         CHECKED_WRITE_BUFF(CHUNK_VIDEO, Pico.video);
  79         if(PicoOpt&7) {
  80                 memset(buff, 0, sizeof(buff));
  81                 z80_pack(buff);
  82                 CHECKED_WRITE_BUFF(CHUNK_Z80, buff);
  83         }
  84         if(PicoOpt&3)
  85                 CHECKED_WRITE(CHUNK_PSG, 28*4, sn76496_regs);
  86         if(PicoOpt&1)
  87                 CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs);
  88
  89         // TODO: cd stuff
  90         if (PicoMCD & 1)
  91         {
  92                 Pico_mcd->m.audio_offset = mp3_get_offset();
  93                 memset(buff, 0, sizeof(buff));
  94                 PicoAreaPackCpu(buff, 1);
  95
  96                 CHECKED_WRITE_BUFF(CHUNK_S68K,     buff);
  97                 CHECKED_WRITE_BUFF(CHUNK_PRG_RAM,  Pico_mcd->prg_ram);
  98                 CHECKED_WRITE_BUFF(CHUNK_WORD_RAM, Pico_mcd->word_ram); // in 2M format
  99                 CHECKED_WRITE_BUFF(CHUNK_BRAM,     Pico_mcd->bram);
 100                 CHECKED_WRITE_BUFF(CHUNK_GA_REGS,  Pico_mcd->s68k_regs);
 101                 CHECKED_WRITE_BUFF(CHUNK_CDD,      Pico_mcd->cdd);
 102                 CHECKED_WRITE_BUFF(CHUNK_CDC,      Pico_mcd->cdc);
 103                 CHECKED_WRITE_BUFF(CHUNK_SCD,      Pico_mcd->scd);
 104                 CHECKED_WRITE_BUFF(CHUNK_RC,       Pico_mcd->rot_comp);
 105                 CHECKED_WRITE_BUFF(CHUNK_MISC_CD,  Pico_mcd->m);
 106         }
 107
 108         return 0;
 109 }
 110
 111 static int g_read_offs = 0;
 112
 113 #define R_ERROR_RETURN(error) \
 114 { \
 115         printf("PicoCdLoadState @ %x: " error "\n", g_read_offs); \
 116         return 1; \
 117 }
 118
 119 // when is eof really set?
 120 #define CHECKED_READ(len,data) \
 121         if (areaRead(data, 1, len, file) != len) { \
 122                 if (len == 1 && areaEof(file)) return 0; \
 123                 R_ERROR_RETURN("areaRead: premature EOF\n"); \
 124                 return 1; \
 125         } \
 126         g_read_offs += len;
 127
 128 #define CHECKED_READ2(len2,data) \
 129         if (len2 != len) R_ERROR_RETURN("unexpected len, wanted " #len2); \
 130         CHECKED_READ(len2, data)
 131
 132 #define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff);
 133
 134 int PicoCdLoadState(void *file)
 135 {
 136         unsigned char buff[0x60];
 137         int ver, len;
 138         void *ym2612_regs = YM2612GetRegs();
 139
 140         g_read_offs = 0;
 141         CHECKED_READ(8, buff);
 142         if (strncmp((char *)buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
 143         CHECKED_READ(4, &ver);
 144
 145         while (!areaEof(file))
 146         {
 147                 CHECKED_READ(1, buff);
 148                 CHECKED_READ(4, &len);
 149                 if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");
 150
 151                 switch (buff[0])
 152                 {
 153                         case CHUNK_M68K:
 154                                 CHECKED_READ_BUFF(buff);
 155                                 PicoAreaUnpackCpu(buff, 0);
 156                                 break;
 157
 158                         case CHUNK_Z80:
 159                                 CHECKED_READ_BUFF(buff);
 160                                 z80_unpack(buff);
 161                                 break;
 162
 163                         case CHUNK_RAM:   CHECKED_READ_BUFF(Pico.ram); break;
 164                         case CHUNK_VRAM:  CHECKED_READ_BUFF(Pico.vram); break;
 165                         case CHUNK_ZRAM:  CHECKED_READ_BUFF(Pico.zram); break;
 166                         case CHUNK_CRAM:  CHECKED_READ_BUFF(Pico.cram); break;
 167                         case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); break;
 168                         case CHUNK_MISC:  CHECKED_READ_BUFF(Pico.m); break;
 169                         case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); break;
 170                         case CHUNK_PSG:   CHECKED_READ2(28*4, sn76496_regs); break;
 171                         case CHUNK_FM:
 172                                 CHECKED_READ2(0x200+4, ym2612_regs);
 173                                 YM2612PicoStateLoad();
 174                                 break;
 175
 176                         // cd stuff
 177                         case CHUNK_S68K:
 178                                 CHECKED_READ_BUFF(buff);
 179                                 PicoAreaUnpackCpu(buff, 1);
 180                                 break;
 181
 182                         case CHUNK_PRG_RAM:     CHECKED_READ_BUFF(Pico_mcd->prg_ram); break;
 183                         case CHUNK_WORD_RAM:    CHECKED_READ_BUFF(Pico_mcd->word_ram); break;
 184                         case CHUNK_BRAM:        CHECKED_READ_BUFF(Pico_mcd->bram); break;
 185                         case CHUNK_GA_REGS:     CHECKED_READ_BUFF(Pico_mcd->s68k_regs); break;
 186                         case CHUNK_CDD:         CHECKED_READ_BUFF(Pico_mcd->cdd); break;
 187                         case CHUNK_CDC:         CHECKED_READ_BUFF(Pico_mcd->cdc); break;
 188                         case CHUNK_SCD:         CHECKED_READ_BUFF(Pico_mcd->scd); break;
 189                         case CHUNK_RC:          CHECKED_READ_BUFF(Pico_mcd->rot_comp); break;
 190
 191                         case CHUNK_MISC_CD:
 192                                 CHECKED_READ_BUFF(Pico_mcd->m);
 193                                 mp3_start_play(Pico_mcd->TOC.Tracks[Pico_mcd->m.audio_track].F, Pico_mcd->m.audio_offset);
 194                                 break;
 195
 196                         default:
 197                                 printf("skipping unknown chunk %i of size %i\n", buff[0], len);
 198                                 areaSeek(file, len, SEEK_CUR);
 199                                 break;
 200                 }
 201         }
 202
 203         return 0;
 204 }
 205