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