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