Pico/cd/cd_file.c

   1 /***********************************************************
   2  *                                                         *
   3  * This source was taken from the Gens project             *
   4  * Written by Stéphane Dallongeville                       *
   5  * Copyright (c) 2002 by Stéphane Dallongeville            *
   6  * Modified/adapted for PicoDrive by notaz, 2007           *
   7  *                                                         *
   8  ***********************************************************/
   9
  10 #include "../PicoInt.h"
  11 #include "cd_file.h"
  12
  13 #define cdprintf dprintf
  14 //#define cdprintf(x...)
  15 //#define cdprintf(f,...) printf(f "\n",##__VA_ARGS__) // tmp
  16 #define DEBUG_CD
  17
  18 PICO_INTERNAL int Load_ISO(const char *iso_name, int is_bin)
  19 {
  20         int i, j, num_track, Cur_LBA, index, ret, iso_name_len;
  21         _scd_track *Tracks = Pico_mcd->TOC.Tracks;
  22         char tmp_name[1024], tmp_ext[10];
  23         pm_file *pmf;
  24         static char *exts[] = {
  25                 "%02d.mp3", " %02d.mp3", "-%02d.mp3", "_%02d.mp3", " - %02d.mp3",
  26                 "%d.mp3", " %d.mp3", "-%d.mp3", "_%d.mp3", " - %d.mp3",
  27 #if CASE_SENSITIVE_FS
  28                 "%02d.MP3", " %02d.MP3", "-%02d.MP3", "_%02d.MP3", " - %02d.MP3",
  29 #endif
  30         };
  31
  32         if (PicoCDLoadProgressCB != NULL) PicoCDLoadProgressCB(1);
  33
  34         Unload_ISO();
  35
  36         Tracks[0].ftype = is_bin ? TYPE_BIN : TYPE_ISO;
  37
  38         Tracks[0].F = pmf = pm_open(iso_name);
  39         if (Tracks[0].F == NULL)
  40         {
  41                 Tracks[0].ftype = 0;
  42                 Tracks[0].Length = 0;
  43                 return -1;
  44         }
  45
  46         if (Tracks[0].ftype == TYPE_ISO)
  47                 Tracks[0].Length = pmf->size >>= 11;    // size in sectors
  48         else    Tracks[0].Length = pmf->size /= 2352;
  49
  50         Tracks[0].MSF.M = 0; // minutes
  51         Tracks[0].MSF.S = 2; // seconds
  52         Tracks[0].MSF.F = 0; // frames
  53
  54         cdprintf("Track 0 - %02d:%02d:%02d DATA", Tracks[0].MSF.M, Tracks[0].MSF.S, Tracks[0].MSF.F);
  55
  56         Cur_LBA = Tracks[0].Length;                             // Size in sectors
  57
  58         iso_name_len = strlen(iso_name);
  59         if (iso_name_len >= sizeof(tmp_name))
  60                 iso_name_len = sizeof(tmp_name) - 1;
  61
  62         for (num_track = 2, i = 0; i < 100; i++)
  63         {
  64                 if (PicoCDLoadProgressCB != NULL && i > 1) PicoCDLoadProgressCB(i);
  65
  66                 for (j = 0; j < sizeof(exts)/sizeof(char *); j++)
  67                 {
  68                         int ext_len;
  69                         FILE *tmp_file;
  70                         sprintf(tmp_ext, exts[j], i);
  71                         ext_len = strlen(tmp_ext);
  72
  73                         memcpy(tmp_name, iso_name, iso_name_len + 1);
  74                         tmp_name[iso_name_len - 4] = 0;
  75                         strcat(tmp_name, tmp_ext);
  76
  77                         tmp_file = fopen(tmp_name, "rb");
  78                         if (!tmp_file && i > 1 && iso_name_len > ext_len) {
  79                                 tmp_name[iso_name_len - ext_len] = 0;
  80                                 strcat(tmp_name, tmp_ext);
  81                                 tmp_file = fopen(tmp_name, "rb");
  82                         }
  83
  84                         if (tmp_file)
  85                         {
  86                                 int fs;
  87                                 index = num_track - 1;
  88
  89                                 ret = fseek(tmp_file, 0, SEEK_END);
  90                                 fs = ftell(tmp_file);                           // used to calculate lenght
  91                                 fseek(tmp_file, 0, SEEK_SET);
  92
  93 #if DONT_OPEN_MANY_FILES
  94                                 // some systems (like PSP) can't have many open files at a time,
  95                                 // so we work with their names instead.
  96                                 fclose(tmp_file);
  97                                 tmp_file = (void *) strdup(tmp_name);
  98 #endif
  99                                 Tracks[index].KBtps = (short) mp3_get_bitrate(tmp_file, fs);
 100                                 Tracks[index].KBtps >>= 3;
 101                                 if (ret != 0 || Tracks[index].KBtps <= 0)
 102                                 {
 103                                         cdprintf("Error track %i: rate %i", index, Tracks[index].KBtps);
 104 #if !DONT_OPEN_MANY_FILES
 105                                         fclose(tmp_file);
 106 #else
 107                                         free(tmp_file);
 108 #endif
 109                                         continue;
 110                                 }
 111
 112                                 Tracks[index].F = tmp_file;
 113
 114                                 LBA_to_MSF(Cur_LBA, &Tracks[index].MSF);
 115
 116                                 // MP3 File
 117                                 Tracks[index].ftype = TYPE_MP3;
 118                                 fs *= 75;
 119                                 fs /= Tracks[index].KBtps * 1000;
 120                                 Tracks[index].Length = fs;
 121                                 Cur_LBA += Tracks[index].Length;
 122
 123                                 cdprintf("Track %i: %s - %02d:%02d:%02d len=%i AUDIO", index, tmp_name, Tracks[index].MSF.M,
 124                                         Tracks[index].MSF.S, Tracks[index].MSF.F, fs);
 125
 126                                 num_track++;
 127                                 break;
 128                         }
 129                 }
 130         }
 131
 132         Pico_mcd->TOC.Last_Track = num_track - 1;
 133
 134         index = num_track - 1;
 135
 136         LBA_to_MSF(Cur_LBA, &Tracks[index].MSF);
 137
 138         cdprintf("End CD - %02d:%02d:%02d\n\n", Tracks[index].MSF.M,
 139                 Tracks[index].MSF.S, Tracks[index].MSF.F);
 140
 141         if (PicoCDLoadProgressCB != NULL) PicoCDLoadProgressCB(100);
 142
 143         return 0;
 144 }
 145
 146
 147 PICO_INTERNAL void Unload_ISO(void)
 148 {
 149         int i;
 150
 151         if (Pico_mcd == NULL) return;
 152
 153         if (Pico_mcd->TOC.Tracks[0].F) pm_close(Pico_mcd->TOC.Tracks[0].F);
 154
 155         for(i = 1; i < 100; i++)
 156         {
 157                 if (Pico_mcd->TOC.Tracks[i].F != NULL)
 158 #if !DONT_OPEN_MANY_FILES
 159                         fclose(Pico_mcd->TOC.Tracks[i].F);
 160 #else
 161                         free(Pico_mcd->TOC.Tracks[i].F);
 162 #endif
 163         }
 164         memset(Pico_mcd->TOC.Tracks, 0, sizeof(Pico_mcd->TOC.Tracks));
 165 }
 166
 167
 168 PICO_INTERNAL int FILE_Read_One_LBA_CDC(void)
 169 {
 170 //      static char cp_buf[2560];
 171
 172         if (Pico_mcd->s68k_regs[0x36] & 1)                                      // DATA
 173         {
 174                 if (Pico_mcd->TOC.Tracks[0].F == NULL) return -1;
 175
 176                 // moved below..
 177                 //fseek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
 178                 //fread(cp_buf, 1, 2048, Pico_mcd->TOC.Tracks[0].F);
 179
 180                 cdprintf("Read file CDC 1 data sector :\n");
 181         }
 182         else                                                                    // AUDIO
 183         {
 184                 // int rate, channel;
 185
 186                 // if (Pico_mcd->TOC.Tracks[Pico_mcd->scd.Cur_Track - 1].ftype == TYPE_MP3)
 187                 {
 188                         // TODO
 189                         // MP3_Update(cp_buf, &rate, &channel, 0);
 190                         // Write_CD_Audio((short *) cp_buf, rate, channel, 588);
 191                 }
 192
 193                 cdprintf("Read file CDC 1 audio sector :\n");
 194         }
 195
 196         // Update CDC stuff
 197
 198         CDC_Update_Header();
 199
 200         if (Pico_mcd->s68k_regs[0x36] & 1)              // DATA track
 201         {
 202                 if (Pico_mcd->cdc.CTRL.B.B0 & 0x80)             // DECEN = decoding enable
 203                 {
 204                         if (Pico_mcd->cdc.CTRL.B.B0 & 0x04)     // WRRQ : this bit enable write to buffer
 205                         {
 206                                 int where_read = 0;
 207
 208                                 // CAUTION : lookahead bit not implemented
 209
 210                                 if (Pico_mcd->scd.Cur_LBA < 0)
 211                                         where_read = 0;
 212                                 else if (Pico_mcd->scd.Cur_LBA >= Pico_mcd->TOC.Tracks[0].Length)
 213                                         where_read = Pico_mcd->TOC.Tracks[0].Length - 1;
 214                                 else where_read = Pico_mcd->scd.Cur_LBA;
 215
 216                                 Pico_mcd->scd.Cur_LBA++;
 217
 218                                 Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF;              // add one sector to WA
 219                                 Pico_mcd->cdc.PT.N = (Pico_mcd->cdc.PT.N + 2352) & 0x7FFF;
 220
 221                                 *(unsigned int *)(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N) = Pico_mcd->cdc.HEAD.N;
 222                                 //memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N + 4], cp_buf, 2048);
 223
 224                                 //pm_seek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
 225                                 //pm_read(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, 2048, Pico_mcd->TOC.Tracks[0].F);
 226                                 PicoCDBufferRead(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, where_read);
 227
 228 #ifdef DEBUG_CD
 229                                 cdprintf("Read -> WA = %d  Buffer[%d] =", Pico_mcd->cdc.WA.N, Pico_mcd->cdc.PT.N & 0x3FFF);
 230                                 cdprintf("Header 1 = %.2X %.2X %.2X %.2X", Pico_mcd->cdc.HEAD.B.B0,
 231                                         Pico_mcd->cdc.HEAD.B.B1, Pico_mcd->cdc.HEAD.B.B2, Pico_mcd->cdc.HEAD.B.B3);
 232                                 cdprintf("Header 2 = %.2X %.2X %.2X %.2X --- %.2X %.2X\n\n",
 233                                         Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 0) & 0x3FFF],
 234                                         Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 1) & 0x3FFF],
 235                                         Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 2) & 0x3FFF],
 236                                         Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 3) & 0x3FFF],
 237                                         Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 4) & 0x3FFF],
 238                                         Pico_mcd->cdc.Buffer[(Pico_mcd->cdc.PT.N + 5) & 0x3FFF]);
 239 #endif
 240                         }
 241
 242                 }
 243         }
 244         else            // music track
 245         {
 246                 Pico_mcd->scd.Cur_LBA++;
 247
 248                 Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF;              // add one sector to WA
 249                 Pico_mcd->cdc.PT.N = (Pico_mcd->cdc.PT.N + 2352) & 0x7FFF;
 250
 251                 if (Pico_mcd->cdc.CTRL.B.B0 & 0x80)             // DECEN = decoding enable
 252                 {
 253                         if (Pico_mcd->cdc.CTRL.B.B0 & 0x04)     // WRRQ : this bit enable write to buffer
 254                         {
 255                                 // CAUTION : lookahead bit not implemented
 256
 257                                 //memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N], cp_buf, 2352);
 258                         }
 259                 }
 260         }
 261
 262         if (Pico_mcd->cdc.CTRL.B.B0 & 0x80)             // DECEN = decoding enable
 263         {
 264                 Pico_mcd->cdc.STAT.B.B0 = 0x80;
 265
 266                 if (Pico_mcd->cdc.CTRL.B.B0 & 0x10)     // determine form bit form sub header ?
 267                 {
 268                         Pico_mcd->cdc.STAT.B.B2 = Pico_mcd->cdc.CTRL.B.B1 & 0x08;
 269                 }
 270                 else
 271                 {
 272                         Pico_mcd->cdc.STAT.B.B2 = Pico_mcd->cdc.CTRL.B.B1 & 0x0C;
 273                 }
 274
 275                 if (Pico_mcd->cdc.CTRL.B.B0 & 0x02) Pico_mcd->cdc.STAT.B.B3 = 0x20;     // ECC done
 276                 else Pico_mcd->cdc.STAT.B.B3 = 0x00;    // ECC not done
 277
 278                 if (Pico_mcd->cdc.IFCTRL & 0x20)
 279                 {
 280                         if (Pico_mcd->s68k_regs[0x33] & (1<<5))
 281                         {
 282                                 dprintf("cdc dec irq 5");
 283                                 SekInterruptS68k(5);
 284                         }
 285
 286                         Pico_mcd->cdc.IFSTAT &= ~0x20;          // DEC interrupt happen
 287                         Pico_mcd->cdc.Decode_Reg_Read = 0;      // Reset read after DEC int
 288                 }
 289         }
 290
 291
 292         return 0;
 293 }
 294
 295
 296 PICO_INTERNAL int FILE_Play_CD_LBA(void)
 297 {
 298         int index = Pico_mcd->scd.Cur_Track - 1;
 299         Pico_mcd->m.audio_track = index;
 300
 301         cdprintf("Play track #%i", Pico_mcd->scd.Cur_Track);
 302
 303         if (Pico_mcd->TOC.Tracks[index].F == NULL)
 304         {
 305                 return 1;
 306         }
 307
 308         if (Pico_mcd->TOC.Tracks[index].ftype == TYPE_MP3)
 309         {
 310                 int pos1024 = 0;
 311                 int Track_LBA_Pos = Pico_mcd->scd.Cur_LBA - Track_to_LBA(Pico_mcd->scd.Cur_Track);
 312                 if (Track_LBA_Pos < 0) Track_LBA_Pos = 0;
 313                 if (Track_LBA_Pos)
 314                         pos1024 = Track_LBA_Pos * 1024 / Pico_mcd->TOC.Tracks[index].Length;
 315
 316                 mp3_start_play(Pico_mcd->TOC.Tracks[index].F, pos1024);
 317         }
 318         else
 319         {
 320                 return 3;
 321         }
 322
 323         return 0;
 324 }
 325