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