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