Pico/cd/Area.c

   1 // This is part of Pico Library
   2
   3 // (c) Copyright 2007 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 void (*PicoStateProgressCB)(const char *str) = 0;
  18
  19
  20 typedef enum {
  21         CHUNK_M68K = 1,
  22         CHUNK_RAM,
  23         CHUNK_VRAM,
  24         CHUNK_ZRAM,
  25         CHUNK_CRAM,     // 5
  26         CHUNK_VSRAM,
  27         CHUNK_MISC,
  28         CHUNK_VIDEO,
  29         CHUNK_Z80,
  30         CHUNK_PSG,      // 10
  31         CHUNK_FM,
  32         // CD stuff
  33         CHUNK_S68K,
  34         CHUNK_PRG_RAM,
  35         CHUNK_WORD_RAM,
  36         CHUNK_PCM_RAM,  // 15
  37         CHUNK_BRAM,
  38         CHUNK_GA_REGS,
  39         CHUNK_PCM,
  40         CHUNK_CDC,
  41         CHUNK_CDD,      // 20
  42         CHUNK_SCD,
  43         CHUNK_RC,
  44         CHUNK_MISC_CD,
  45 } chunk_name_e;
  46
  47
  48 static char *chunk_names[] = {
  49         "Saving.. M68K state",
  50         "Saving.. RAM",
  51         "Saving.. VRAM",
  52         "Saving.. ZRAM",
  53         "Saving.. CRAM",        // 5
  54         "Saving.. VSRAM",
  55         "Saving.. emu state",
  56         "Saving.. VIDEO",
  57         "Saving.. Z80 state",
  58         "Saving.. PSG",         // 10
  59         "Saving.. FM",
  60         // CD stuff
  61         "Saving.. S68K state",
  62         "Saving.. PRG_RAM",
  63         "Saving.. WORD_RAM",
  64         "Saving.. PCM_RAM",     // 15
  65         "Saving.. BRAM",
  66         "Saving.. GATE ARRAY regs",
  67         "Saving.. PCM state",
  68         "Saving.. CDC",
  69         "Saving.. CDD",         // 20
  70         "Saving.. SCD",
  71         "Saving.. GFX chip",
  72         "Saving.. MCD state",
  73 };
  74
  75
  76 static int write_chunk(chunk_name_e name, int len, void *data, void *file)
  77 {
  78         size_t bwritten = 0;
  79         bwritten += areaWrite(&name, 1, 1, file);
  80         bwritten += areaWrite(&len, 1, 4, file);
  81         bwritten += areaWrite(data, 1, len, file);
  82
  83         return (bwritten == len + 4 + 1);
  84 }
  85
  86
  87 #define CHECKED_WRITE(name,len,data) \
  88         if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \
  89         if (!write_chunk(name, len, data, file)) return 1;
  90
  91 #define CHECKED_WRITE_BUFF(name,buff) \
  92         if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \
  93         if (!write_chunk(name, sizeof(buff), &buff, file)) return 1;
  94
  95 int PicoCdSaveState(void *file)
  96 {
  97         unsigned char buff[0x60];
  98         void *ym2612_regs = YM2612GetRegs();
  99
 100         areaWrite("PicoSMCD", 1, 8, file);
 101         areaWrite(&PicoVer, 1, 4, file);
 102
 103         memset(buff, 0, sizeof(buff));
 104         PicoAreaPackCpu(buff, 0);
 105         CHECKED_WRITE_BUFF(CHUNK_M68K,  buff);
 106         CHECKED_WRITE_BUFF(CHUNK_RAM,   Pico.ram);
 107         CHECKED_WRITE_BUFF(CHUNK_VRAM,  Pico.vram);
 108         CHECKED_WRITE_BUFF(CHUNK_ZRAM,  Pico.zram);
 109         CHECKED_WRITE_BUFF(CHUNK_CRAM,  Pico.cram);
 110         CHECKED_WRITE_BUFF(CHUNK_VSRAM, Pico.vsram);
 111         CHECKED_WRITE_BUFF(CHUNK_MISC,  Pico.m);
 112         CHECKED_WRITE_BUFF(CHUNK_VIDEO, Pico.video);
 113         if(PicoOpt&7) {
 114                 memset(buff, 0, sizeof(buff));
 115                 z80_pack(buff);
 116                 CHECKED_WRITE_BUFF(CHUNK_Z80, buff);
 117         }
 118         if(PicoOpt&3)
 119                 CHECKED_WRITE(CHUNK_PSG, 28*4, sn76496_regs);
 120         if(PicoOpt&1)
 121                 CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs);
 122
 123         if (PicoMCD & 1)
 124         {
 125                 Pico_mcd->m.audio_offset = mp3_get_offset();
 126                 memset(buff, 0, sizeof(buff));
 127                 PicoAreaPackCpu(buff, 1);
 128                 if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
 129                         wram_1M_to_2M(Pico_mcd->word_ram2M);
 130                 Pico_mcd->m.hint_vector = *(unsigned short *)(Pico_mcd->bios + 0x72);
 131
 132                 CHECKED_WRITE_BUFF(CHUNK_S68K,     buff);
 133                 CHECKED_WRITE_BUFF(CHUNK_PRG_RAM,  Pico_mcd->prg_ram);
 134                 CHECKED_WRITE_BUFF(CHUNK_WORD_RAM, Pico_mcd->word_ram2M); // in 2M format
 135                 CHECKED_WRITE_BUFF(CHUNK_PCM_RAM,  Pico_mcd->pcm_ram);
 136                 CHECKED_WRITE_BUFF(CHUNK_BRAM,     Pico_mcd->bram);
 137                 CHECKED_WRITE_BUFF(CHUNK_GA_REGS,  Pico_mcd->s68k_regs); // GA regs, not CPU regs
 138                 CHECKED_WRITE_BUFF(CHUNK_PCM,      Pico_mcd->pcm);
 139                 CHECKED_WRITE_BUFF(CHUNK_CDD,      Pico_mcd->cdd);
 140                 CHECKED_WRITE_BUFF(CHUNK_CDC,      Pico_mcd->cdc);
 141                 CHECKED_WRITE_BUFF(CHUNK_SCD,      Pico_mcd->scd);
 142                 CHECKED_WRITE_BUFF(CHUNK_RC,       Pico_mcd->rot_comp);
 143                 CHECKED_WRITE_BUFF(CHUNK_MISC_CD,  Pico_mcd->m);
 144
 145                 if (Pico_mcd->s68k_regs[3]&4) // convert back
 146                         wram_2M_to_1M(Pico_mcd->word_ram2M);
 147         }
 148
 149         return 0;
 150 }
 151
 152 static int g_read_offs = 0;
 153
 154 #define R_ERROR_RETURN(error) \
 155 { \
 156         printf("PicoCdLoadState @ %x: " error "\n", g_read_offs); \
 157         return 1; \
 158 }
 159
 160 // when is eof really set?
 161 #define CHECKED_READ(len,data) \
 162         if (areaRead(data, 1, len, file) != len) { \
 163                 if (len == 1 && areaEof(file)) return 0; \
 164                 R_ERROR_RETURN("areaRead: premature EOF\n"); \
 165                 return 1; \
 166         } \
 167         g_read_offs += len;
 168
 169 #define CHECKED_READ2(len2,data) \
 170         if (len2 != len) R_ERROR_RETURN("unexpected len, wanted " #len2); \
 171         CHECKED_READ(len2, data)
 172
 173 #define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff);
 174
 175 int PicoCdLoadState(void *file)
 176 {
 177         unsigned char buff[0x60];
 178         int ver, len;
 179         void *ym2612_regs = YM2612GetRegs();
 180
 181         g_read_offs = 0;
 182         CHECKED_READ(8, buff);
 183         if (strncmp((char *)buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
 184         CHECKED_READ(4, &ver);
 185
 186         while (!areaEof(file))
 187         {
 188                 CHECKED_READ(1, buff);
 189                 CHECKED_READ(4, &len);
 190                 if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");
 191                 if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?");
 192
 193                 switch (buff[0])
 194                 {
 195                         case CHUNK_M68K:
 196                                 CHECKED_READ_BUFF(buff);
 197                                 PicoAreaUnpackCpu(buff, 0);
 198                                 break;
 199
 200                         case CHUNK_Z80:
 201                                 CHECKED_READ_BUFF(buff);
 202                                 z80_unpack(buff);
 203                                 break;
 204
 205                         case CHUNK_RAM:   CHECKED_READ_BUFF(Pico.ram); break;
 206                         case CHUNK_VRAM:  CHECKED_READ_BUFF(Pico.vram); break;
 207                         case CHUNK_ZRAM:  CHECKED_READ_BUFF(Pico.zram); break;
 208                         case CHUNK_CRAM:  CHECKED_READ_BUFF(Pico.cram); break;
 209                         case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); break;
 210                         case CHUNK_MISC:  CHECKED_READ_BUFF(Pico.m); break;
 211                         case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); break;
 212                         case CHUNK_PSG:   CHECKED_READ2(28*4, sn76496_regs); break;
 213                         case CHUNK_FM:
 214                                 CHECKED_READ2(0x200+4, ym2612_regs);
 215                                 YM2612PicoStateLoad();
 216                                 break;
 217
 218                         // cd stuff
 219                         case CHUNK_S68K:
 220                                 CHECKED_READ_BUFF(buff);
 221                                 PicoAreaUnpackCpu(buff, 1);
 222                                 break;
 223
 224                         case CHUNK_PRG_RAM:     CHECKED_READ_BUFF(Pico_mcd->prg_ram); break;
 225                         case CHUNK_WORD_RAM:    CHECKED_READ_BUFF(Pico_mcd->word_ram2M); break;
 226                         case CHUNK_PCM_RAM:     CHECKED_READ_BUFF(Pico_mcd->pcm_ram); break;
 227                         case CHUNK_BRAM:        CHECKED_READ_BUFF(Pico_mcd->bram); break;
 228                         case CHUNK_GA_REGS:     CHECKED_READ_BUFF(Pico_mcd->s68k_regs); break;
 229                         case CHUNK_PCM:         CHECKED_READ_BUFF(Pico_mcd->pcm); break;
 230                         case CHUNK_CDD:         CHECKED_READ_BUFF(Pico_mcd->cdd); break;
 231                         case CHUNK_CDC:         CHECKED_READ_BUFF(Pico_mcd->cdc); break;
 232                         case CHUNK_SCD:         CHECKED_READ_BUFF(Pico_mcd->scd); break;
 233                         case CHUNK_RC:          CHECKED_READ_BUFF(Pico_mcd->rot_comp); break;
 234                         case CHUNK_MISC_CD:     CHECKED_READ_BUFF(Pico_mcd->m); break;
 235
 236                         default:
 237                                 printf("PicoCdLoadState: skipping unknown chunk %i of size %i\n", buff[0], len);
 238                                 areaSeek(file, len, SEEK_CUR);
 239                                 break;
 240                 }
 241         }
 242
 243         /* after load events */
 244         if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
 245                 wram_2M_to_1M(Pico_mcd->word_ram2M);
 246         mp3_start_play(Pico_mcd->TOC.Tracks[Pico_mcd->m.audio_track].F, Pico_mcd->m.audio_offset);
 247         // restore hint vector
 248         *(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;
 249
 250         return 0;
 251 }
 252
 253
 254 int PicoCdLoadStateGfx(void *file)
 255 {
 256         int ver, len, found = 0;
 257         char buff[8];
 258
 259         g_read_offs = 0;
 260         CHECKED_READ(8, buff);
 261         if (strncmp(buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
 262         CHECKED_READ(4, &ver);
 263
 264         while (!areaEof(file) && found < 4)
 265         {
 266                 CHECKED_READ(1, buff);
 267                 CHECKED_READ(4, &len);
 268                 if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");
 269                 if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?");
 270
 271                 switch (buff[0])
 272                 {
 273                         case CHUNK_VRAM:  CHECKED_READ_BUFF(Pico.vram);  found++; break;
 274                         case CHUNK_CRAM:  CHECKED_READ_BUFF(Pico.cram);  found++; break;
 275                         case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); found++; break;
 276                         case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); found++; break;
 277                         default:
 278                                 areaSeek(file, len, SEEK_CUR);
 279                                 break;
 280                 }
 281         }
 282
 283         return 0;
 284 }
 285
 286