libpcsxcore/cdriso.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 PCSX-df Team                                       *
   3  *   Copyright (C) 2009 Wei Mingzhi                                        *
   4  *   Copyright (C) 2012 notaz                                              *
   5  *                                                                         *
   6  *   This program is free software; you can redistribute it and/or modify  *
   7  *   it under the terms of the GNU General Public License as published by  *
   8  *   the Free Software Foundation; either version 2 of the License, or     *
   9  *   (at your option) any later version.                                   *
  10  *                                                                         *
  11  *   This program is distributed in the hope that it will be useful,       *
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  14  *   GNU General Public License for more details.                          *
  15  *                                                                         *
  16  *   You should have received a copy of the GNU General Public License     *
  17  *   along with this program; if not, write to the                         *
  18  *   Free Software Foundation, Inc.,                                       *
  19  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  20  ***************************************************************************/
  21
  22 #include "psxcommon.h"
  23 #include "plugins.h"
  24 #include "cdrom.h"
  25 #include "cdriso.h"
  26 #include "ppf.h"
  27
  28 #ifdef _WIN32
  29 #include <process.h>
  30 #include <windows.h>
  31 #define strcasecmp _stricmp
  32 #else
  33 #include <pthread.h>
  34 #include <sys/time.h>
  35 #include <unistd.h>
  36 #endif
  37 #include <zlib.h>
  38
  39 unsigned int cdrIsoMultidiskCount;
  40 unsigned int cdrIsoMultidiskSelect;
  41
  42 static FILE *cdHandle = NULL;
  43 static FILE *cddaHandle = NULL;
  44 static FILE *subHandle = NULL;
  45
  46 static boolean subChanMixed = FALSE;
  47 static boolean subChanRaw = FALSE;
  48 static boolean subChanMissing = FALSE;
  49
  50 static boolean multifile = FALSE;
  51
  52 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
  53 static unsigned char subbuffer[SUB_FRAMESIZE];
  54
  55 static unsigned char sndbuffer[CD_FRAMESIZE_RAW * 10];
  56
  57 #define CDDA_FRAMETIME                  (1000 * (sizeof(sndbuffer) / CD_FRAMESIZE_RAW) / 75)
  58
  59 #ifdef _WIN32
  60 static HANDLE threadid;
  61 #else
  62 static pthread_t threadid;
  63 #endif
  64 static unsigned int initial_offset = 0;
  65 static boolean playing = FALSE;
  66 static boolean cddaBigEndian = FALSE;
  67 // cdda sectors in toc, byte offset in file
  68 static unsigned int cdda_cur_sector;
  69 static unsigned int cdda_first_sector;
  70 static unsigned int cdda_file_offset;
  71 /* Frame offset into CD image where pregap data would be found if it was there.
  72  * If a game seeks there we must *not* return subchannel data since it's
  73  * not in the CD image, so that cdrom code can fake subchannel data instead.
  74  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  75 static unsigned int pregapOffset;
  76
  77 #define cddaCurPos cdda_cur_sector
  78
  79 // compressed image stuff
  80 static struct {
  81         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  82         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  83         unsigned int *index_table;
  84         unsigned int index_len;
  85         unsigned int block_shift;
  86         unsigned int current_block;
  87         unsigned int sector_in_blk;
  88 } *compr_img;
  89
  90 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
  91
  92 char* CALLBACK CDR__getDriveLetter(void);
  93 long CALLBACK CDR__configure(void);
  94 long CALLBACK CDR__test(void);
  95 void CALLBACK CDR__about(void);
  96 long CALLBACK CDR__setfilename(char *filename);
  97 long CALLBACK CDR__getStatus(struct CdrStat *stat);
  98
  99 static void DecodeRawSubData(void);
 100
 101 struct trackinfo {
 102         enum {DATA=1, CDDA} type;
 103         char start[3];          // MSF-format
 104         char length[3];         // MSF-format
 105         FILE *handle;           // for multi-track images CDDA
 106         unsigned int start_offset; // byte offset from start of above file
 107 };
 108
 109 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 110
 111 static int numtracks = 0;
 112 static struct trackinfo ti[MAXTRACKS];
 113
 114 // get a sector from a msf-array
 115 static unsigned int msf2sec(char *msf) {
 116         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 117 }
 118
 119 static void sec2msf(unsigned int s, char *msf) {
 120         msf[0] = s / 75 / 60;
 121         s = s - msf[0] * 75 * 60;
 122         msf[1] = s / 75;
 123         s = s - msf[1] * 75;
 124         msf[2] = s;
 125 }
 126
 127 // divide a string of xx:yy:zz into m, s, f
 128 static void tok2msf(char *time, char *msf) {
 129         char *token;
 130
 131         token = strtok(time, ":");
 132         if (token) {
 133                 msf[0] = atoi(token);
 134         }
 135         else {
 136                 msf[0] = 0;
 137         }
 138
 139         token = strtok(NULL, ":");
 140         if (token) {
 141                 msf[1] = atoi(token);
 142         }
 143         else {
 144                 msf[1] = 0;
 145         }
 146
 147         token = strtok(NULL, ":");
 148         if (token) {
 149                 msf[2] = atoi(token);
 150         }
 151         else {
 152                 msf[2] = 0;
 153         }
 154 }
 155
 156 #ifndef _WIN32
 157 static long GetTickCount(void) {
 158         static time_t           initial_time = 0;
 159         struct timeval          now;
 160
 161         gettimeofday(&now, NULL);
 162
 163         if (initial_time == 0) {
 164                 initial_time = now.tv_sec;
 165         }
 166
 167         return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
 168 }
 169 #endif
 170
 171 // this thread plays audio data
 172 #ifdef _WIN32
 173 static void playthread(void *param)
 174 #else
 175 static void *playthread(void *param)
 176 #endif
 177 {
 178         long osleep, d, t, i, s;
 179         unsigned char   tmp;
 180         int ret = 0, sector_offs;
 181
 182         t = GetTickCount();
 183
 184         while (playing) {
 185                 s = 0;
 186                 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
 187                         sector_offs = cdda_cur_sector - cdda_first_sector;
 188                         if (sector_offs < 0) {
 189                                 d = CD_FRAMESIZE_RAW;
 190                                 memset(sndbuffer + s, 0, d);
 191                         }
 192                         else {
 193                                 d = cdimg_read_func(cddaHandle, cdda_file_offset,
 194                                         sndbuffer + s, sector_offs);
 195                                 if (d < CD_FRAMESIZE_RAW)
 196                                         break;
 197                         }
 198
 199                         s += d;
 200                         cdda_cur_sector++;
 201                 }
 202
 203                 if (s == 0) {
 204                         playing = FALSE;
 205                         initial_offset = 0;
 206                         break;
 207                 }
 208
 209                 if (!cdr.Muted && playing) {
 210                         if (cddaBigEndian) {
 211                                 for (i = 0; i < s / 2; i++) {
 212                                         tmp = sndbuffer[i * 2];
 213                                         sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
 214                                         sndbuffer[i * 2 + 1] = tmp;
 215                                 }
 216                         }
 217
 218                         // can't do it yet due to readahead..
 219                         //cdrAttenuate((short *)sndbuffer, s / 4, 1);
 220                         do {
 221                                 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
 222                                 if (ret == 0x7761)
 223                                         usleep(6 * 1000);
 224                         } while (ret == 0x7761 && playing); // rearmed_wait
 225                 }
 226
 227                 if (ret != 0x676f) { // !rearmed_go
 228                         // do approx sleep
 229                         long now;
 230
 231                         // HACK: stop feeding data while emu is paused
 232                         extern int stop;
 233                         while (stop && playing)
 234                                 usleep(10000);
 235
 236                         now = GetTickCount();
 237                         osleep = t - now;
 238                         if (osleep <= 0) {
 239                                 osleep = 1;
 240                                 t = now;
 241                         }
 242                         else if (osleep > CDDA_FRAMETIME) {
 243                                 osleep = CDDA_FRAMETIME;
 244                                 t = now;
 245                         }
 246
 247                         usleep(osleep * 1000);
 248                         t += CDDA_FRAMETIME;
 249                 }
 250
 251         }
 252
 253 #ifdef _WIN32
 254         _endthread();
 255 #else
 256         pthread_exit(0);
 257         return NULL;
 258 #endif
 259 }
 260
 261 // stop the CDDA playback
 262 static void stopCDDA() {
 263         if (!playing) {
 264                 return;
 265         }
 266
 267         playing = FALSE;
 268 #ifdef _WIN32
 269         WaitForSingleObject(threadid, INFINITE);
 270 #else
 271         pthread_join(threadid, NULL);
 272 #endif
 273 }
 274
 275 // start the CDDA playback
 276 static void startCDDA(void) {
 277         if (playing) {
 278                 stopCDDA();
 279         }
 280
 281         playing = TRUE;
 282
 283 #ifdef _WIN32
 284         threadid = (HANDLE)_beginthread(playthread, 0, NULL);
 285 #else
 286         pthread_create(&threadid, NULL, playthread, NULL);
 287 #endif
 288 }
 289
 290 // this function tries to get the .toc file of the given .bin
 291 // the necessary data is put into the ti (trackinformation)-array
 292 static int parsetoc(const char *isofile) {
 293         char                    tocname[MAXPATHLEN];
 294         FILE                    *fi;
 295         char                    linebuf[256], tmp[256], name[256];
 296         char                    *token;
 297         char                    time[20], time2[20];
 298         unsigned int    t, sector_offs, sector_size;
 299         unsigned int    current_zero_gap = 0;
 300
 301         numtracks = 0;
 302
 303         // copy name of the iso and change extension from .bin to .toc
 304         strncpy(tocname, isofile, sizeof(tocname));
 305         tocname[MAXPATHLEN - 1] = '\0';
 306         if (strlen(tocname) >= 4) {
 307                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 308         }
 309         else {
 310                 return -1;
 311         }
 312
 313         if ((fi = fopen(tocname, "r")) == NULL) {
 314                 // try changing extension to .cue (to satisfy some stupid tutorials)
 315                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 316                 if ((fi = fopen(tocname, "r")) == NULL) {
 317                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 318                         strcpy(tocname, isofile);
 319                         t = strlen(tocname);
 320                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 321                                 tocname[t - 4] = '\0';
 322                                 if ((fi = fopen(tocname, "r")) == NULL) {
 323                                         return -1;
 324                                 }
 325                         }
 326                         else {
 327                                 return -1;
 328                         }
 329                 }
 330 #ifndef __LIBRETRO__
 331                 // check if it's really a TOC named as a .cue
 332                 fgets(linebuf, sizeof(linebuf), fi);
 333                 token = strtok(tmp, " ");
 334                 if (strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 335                         fclose(fi);
 336                         return -1;
 337                 }
 338                 fseek(fi, 0, SEEK_SET);
 339 #endif
 340         }
 341
 342         memset(&ti, 0, sizeof(ti));
 343         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 344
 345         sector_size = CD_FRAMESIZE_RAW;
 346         sector_offs = 2 * 75;
 347
 348         // parse the .toc file
 349         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 350                 // search for tracks
 351                 strncpy(tmp, linebuf, sizeof(linebuf));
 352                 token = strtok(tmp, " ");
 353
 354                 if (token == NULL) continue;
 355
 356                 if (!strcmp(token, "TRACK")) {
 357                         sector_offs += current_zero_gap;
 358                         current_zero_gap = 0;
 359
 360                         // get type of track
 361                         token = strtok(NULL, " ");
 362                         numtracks++;
 363
 364                         if (!strncmp(token, "MODE2_RAW", 9)) {
 365                                 ti[numtracks].type = DATA;
 366                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 367
 368                                 // check if this image contains mixed subchannel data
 369                                 token = strtok(NULL, " ");
 370                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 371                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 372                                         subChanMixed = TRUE;
 373                                         if (!strncmp(token, "RW_RAW", 6))
 374                                                 subChanRaw = TRUE;
 375                                 }
 376                         }
 377                         else if (!strncmp(token, "AUDIO", 5)) {
 378                                 ti[numtracks].type = CDDA;
 379                         }
 380                 }
 381                 else if (!strcmp(token, "DATAFILE")) {
 382                         if (ti[numtracks].type == CDDA) {
 383                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 384                                 ti[numtracks].start_offset = t;
 385                                 t = t / sector_size + sector_offs;
 386                                 sec2msf(t, (char *)&ti[numtracks].start);
 387                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 388                         }
 389                         else {
 390                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 391                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 392                         }
 393                 }
 394                 else if (!strcmp(token, "FILE")) {
 395                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 396                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 397                         t += msf2sec(ti[numtracks].start) * sector_size;
 398                         ti[numtracks].start_offset = t;
 399                         t = t / sector_size + sector_offs;
 400                         sec2msf(t, (char *)&ti[numtracks].start);
 401                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 402                 }
 403                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 404                         // skip unneeded optional fields
 405                         while (token != NULL) {
 406                                 token = strtok(NULL, " ");
 407                                 if (strchr(token, ':') != NULL)
 408                                         break;
 409                         }
 410                         if (token != NULL) {
 411                                 tok2msf(token, tmp);
 412                                 current_zero_gap = msf2sec(tmp);
 413                         }
 414                         if (numtracks > 1) {
 415                                 t = ti[numtracks - 1].start_offset;
 416                                 t /= sector_size;
 417                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 418                         }
 419                 }
 420                 else if (!strcmp(token, "START")) {
 421                         token = strtok(NULL, " ");
 422                         if (token != NULL && strchr(token, ':')) {
 423                                 tok2msf(token, tmp);
 424                                 t = msf2sec(tmp);
 425                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 426                                 t = msf2sec(ti[numtracks].start) + t;
 427                                 sec2msf(t, (char *)&ti[numtracks].start);
 428                         }
 429                 }
 430         }
 431
 432         fclose(fi);
 433
 434         return 0;
 435 }
 436
 437 // this function tries to get the .cue file of the given .bin
 438 // the necessary data is put into the ti (trackinformation)-array
 439 static int parsecue(const char *isofile) {
 440         char                    cuename[MAXPATHLEN];
 441         char                    filepath[MAXPATHLEN];
 442         char                    *incue_fname;
 443         FILE                    *fi;
 444         char                    *token;
 445         char                    time[20];
 446         char                    *tmp;
 447         char                    linebuf[256], tmpb[256], dummy[256];
 448         unsigned int    incue_max_len;
 449         unsigned int    t, file_len, mode, sector_offs;
 450         unsigned int    sector_size = 2352;
 451
 452         numtracks = 0;
 453
 454         // copy name of the iso and change extension from .bin to .cue
 455         strncpy(cuename, isofile, sizeof(cuename));
 456         cuename[MAXPATHLEN - 1] = '\0';
 457         if (strlen(cuename) >= 4) {
 458                 strcpy(cuename + strlen(cuename) - 4, ".cue");
 459         }
 460         else {
 461                 return -1;
 462         }
 463
 464         if ((fi = fopen(cuename, "r")) == NULL) {
 465                 return -1;
 466         }
 467
 468         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 469         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 470         // that...
 471         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 472                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 473                         // Don't proceed further, as this is actually a .toc file rather
 474                         // than a .cue file.
 475                         fclose(fi);
 476                         return parsetoc(isofile);
 477                 }
 478                 fseek(fi, 0, SEEK_SET);
 479         }
 480
 481         // build a path for files referenced in .cue
 482         strncpy(filepath, cuename, sizeof(filepath));
 483         tmp = strrchr(filepath, '/');
 484         if (tmp == NULL)
 485                 tmp = strrchr(filepath, '\\');
 486         if (tmp != NULL)
 487                 tmp++;
 488         else
 489                 tmp = filepath;
 490         *tmp = 0;
 491         filepath[sizeof(filepath) - 1] = 0;
 492         incue_fname = tmp;
 493         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 494
 495         memset(&ti, 0, sizeof(ti));
 496
 497         file_len = 0;
 498         sector_offs = 2 * 75;
 499
 500         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 501                 strncpy(dummy, linebuf, sizeof(linebuf));
 502                 token = strtok(dummy, " ");
 503
 504                 if (token == NULL) {
 505                         continue;
 506                 }
 507
 508                 if (!strcmp(token, "TRACK")) {
 509                         numtracks++;
 510
 511                         sector_size = 0;
 512                         if (strstr(linebuf, "AUDIO") != NULL) {
 513                                 ti[numtracks].type = CDDA;
 514                                 sector_size = 2352;
 515                         }
 516                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 517                                 ti[numtracks].type = DATA;
 518                         else {
 519                                 SysPrintf(".cue: failed to parse TRACK\n");
 520                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 521                         }
 522                         if (sector_size == 0)
 523                                 sector_size = 2352;
 524                 }
 525                 else if (!strcmp(token, "INDEX")) {
 526                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 527                                 SysPrintf(".cue: failed to parse INDEX\n");
 528                         tok2msf(time, (char *)&ti[numtracks].start);
 529
 530                         t = msf2sec(ti[numtracks].start);
 531                         ti[numtracks].start_offset = t * sector_size;
 532                         t += sector_offs;
 533                         sec2msf(t, ti[numtracks].start);
 534
 535                         // default track length to file length
 536                         t = file_len - ti[numtracks].start_offset / sector_size;
 537                         sec2msf(t, ti[numtracks].length);
 538
 539                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 540                                 // this track uses the same file as the last,
 541                                 // start of this track is last track's end
 542                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 543                                 sec2msf(t, ti[numtracks - 1].length);
 544                         }
 545                         if (numtracks > 1 && pregapOffset == -1)
 546                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 547                 }
 548                 else if (!strcmp(token, "PREGAP")) {
 549                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 550                                 tok2msf(time, dummy);
 551                                 sector_offs += msf2sec(dummy);
 552                         }
 553                         pregapOffset = -1; // mark to fill track start_offset
 554                 }
 555                 else if (!strcmp(token, "FILE")) {
 556                         t = sscanf(linebuf, " FILE \"%256[^\"]\"", tmpb);
 557                         if (t != 1)
 558                                 sscanf(linebuf, " FILE %256s", tmpb);
 559
 560                         // absolute path?
 561                         ti[numtracks + 1].handle = fopen(tmpb, "rb");
 562                         if (ti[numtracks + 1].handle == NULL) {
 563                                 // relative to .cue?
 564                                 tmp = strrchr(tmpb, '\\');
 565                                 if (tmp == NULL)
 566                                         tmp = strrchr(tmpb, '/');
 567                                 if (tmp != NULL)
 568                                         tmp++;
 569                                 else
 570                                         tmp = tmpb;
 571                                 strncpy(incue_fname, tmp, incue_max_len);
 572                                 ti[numtracks + 1].handle = fopen(filepath, "rb");
 573                         }
 574
 575                         // update global offset if this is not first file in this .cue
 576                         if (numtracks + 1 > 1) {
 577                                 multifile = 1;
 578                                 sector_offs += file_len;
 579                         }
 580
 581                         file_len = 0;
 582                         if (ti[numtracks + 1].handle == NULL) {
 583                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 584                                 continue;
 585                         }
 586                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 587                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 588
 589                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 590                                 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
 591                         {
 592                                 // user selected .cue as image file, use it's data track instead
 593                                 fclose(cdHandle);
 594                                 cdHandle = fopen(filepath, "rb");
 595                         }
 596                 }
 597         }
 598
 599         fclose(fi);
 600
 601         return 0;
 602 }
 603
 604 // this function tries to get the .ccd file of the given .img
 605 // the necessary data is put into the ti (trackinformation)-array
 606 static int parseccd(const char *isofile) {
 607         char                    ccdname[MAXPATHLEN];
 608         FILE                    *fi;
 609         char                    linebuf[256];
 610         unsigned int    t;
 611
 612         numtracks = 0;
 613
 614         // copy name of the iso and change extension from .img to .ccd
 615         strncpy(ccdname, isofile, sizeof(ccdname));
 616         ccdname[MAXPATHLEN - 1] = '\0';
 617         if (strlen(ccdname) >= 4) {
 618                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 619         }
 620         else {
 621                 return -1;
 622         }
 623
 624         if ((fi = fopen(ccdname, "r")) == NULL) {
 625                 return -1;
 626         }
 627
 628         memset(&ti, 0, sizeof(ti));
 629
 630         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 631                 if (!strncmp(linebuf, "[TRACK", 6)){
 632                         numtracks++;
 633                 }
 634                 else if (!strncmp(linebuf, "MODE=", 5)) {
 635                         sscanf(linebuf, "MODE=%d", &t);
 636                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 637                 }
 638                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 639                         sscanf(linebuf, "INDEX 1=%d", &t);
 640                         sec2msf(t + 2 * 75, ti[numtracks].start);
 641                         ti[numtracks].start_offset = t * 2352;
 642
 643                         // If we've already seen another track, this is its end
 644                         if (numtracks > 1) {
 645                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 646                                 sec2msf(t, ti[numtracks - 1].length);
 647                         }
 648                 }
 649         }
 650
 651         fclose(fi);
 652
 653         // Fill out the last track's end based on size
 654         if (numtracks >= 1) {
 655                 fseek(cdHandle, 0, SEEK_END);
 656                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 657                 sec2msf(t, ti[numtracks].length);
 658         }
 659
 660         return 0;
 661 }
 662
 663 // this function tries to get the .mds file of the given .mdf
 664 // the necessary data is put into the ti (trackinformation)-array
 665 static int parsemds(const char *isofile) {
 666         char                    mdsname[MAXPATHLEN];
 667         FILE                    *fi;
 668         unsigned int    offset, extra_offset, l, i;
 669         unsigned short  s;
 670
 671         numtracks = 0;
 672
 673         // copy name of the iso and change extension from .mdf to .mds
 674         strncpy(mdsname, isofile, sizeof(mdsname));
 675         mdsname[MAXPATHLEN - 1] = '\0';
 676         if (strlen(mdsname) >= 4) {
 677                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 678         }
 679         else {
 680                 return -1;
 681         }
 682
 683         if ((fi = fopen(mdsname, "rb")) == NULL) {
 684                 return -1;
 685         }
 686
 687         memset(&ti, 0, sizeof(ti));
 688
 689         // check if it's a valid mds file
 690         fread(&i, 1, sizeof(unsigned int), fi);
 691         i = SWAP32(i);
 692         if (i != 0x4944454D) {
 693                 // not an valid mds file
 694                 fclose(fi);
 695                 return -1;
 696         }
 697
 698         // get offset to session block
 699         fseek(fi, 0x50, SEEK_SET);
 700         fread(&offset, 1, sizeof(unsigned int), fi);
 701         offset = SWAP32(offset);
 702
 703         // get total number of tracks
 704         offset += 14;
 705         fseek(fi, offset, SEEK_SET);
 706         fread(&s, 1, sizeof(unsigned short), fi);
 707         s = SWAP16(s);
 708         numtracks = s;
 709
 710         // get offset to track blocks
 711         fseek(fi, 4, SEEK_CUR);
 712         fread(&offset, 1, sizeof(unsigned int), fi);
 713         offset = SWAP32(offset);
 714
 715         // skip lead-in data
 716         while (1) {
 717                 fseek(fi, offset + 4, SEEK_SET);
 718                 if (fgetc(fi) < 0xA0) {
 719                         break;
 720                 }
 721                 offset += 0x50;
 722         }
 723
 724         // check if the image contains mixed subchannel data
 725         fseek(fi, offset + 1, SEEK_SET);
 726         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 727
 728         // read track data
 729         for (i = 1; i <= numtracks; i++) {
 730                 fseek(fi, offset, SEEK_SET);
 731
 732                 // get the track type
 733                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 734                 fseek(fi, 8, SEEK_CUR);
 735
 736                 // get the track starting point
 737                 ti[i].start[0] = fgetc(fi);
 738                 ti[i].start[1] = fgetc(fi);
 739                 ti[i].start[2] = fgetc(fi);
 740
 741                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 742                 extra_offset = SWAP32(extra_offset);
 743
 744                 // get track start offset (in .mdf)
 745                 fseek(fi, offset + 0x28, SEEK_SET);
 746                 fread(&l, 1, sizeof(unsigned int), fi);
 747                 l = SWAP32(l);
 748                 ti[i].start_offset = l;
 749
 750                 // get pregap
 751                 fseek(fi, extra_offset, SEEK_SET);
 752                 fread(&l, 1, sizeof(unsigned int), fi);
 753                 l = SWAP32(l);
 754                 if (l != 0 && i > 1)
 755                         pregapOffset = msf2sec(ti[i].start);
 756
 757                 // get the track length
 758                 fread(&l, 1, sizeof(unsigned int), fi);
 759                 l = SWAP32(l);
 760                 sec2msf(l, ti[i].length);
 761
 762                 offset += 0x50;
 763         }
 764
 765         fclose(fi);
 766         return 0;
 767 }
 768
 769 static int handlepbp(const char *isofile) {
 770         struct {
 771                 unsigned int sig;
 772                 unsigned int dontcare[8];
 773                 unsigned int psar_offs;
 774         } pbp_hdr;
 775         struct {
 776                 unsigned char type;
 777                 unsigned char pad0;
 778                 unsigned char track;
 779                 char index0[3];
 780                 char pad1;
 781                 char index1[3];
 782         } toc_entry;
 783         struct {
 784                 unsigned int offset;
 785                 unsigned int size;
 786                 unsigned int dontcare[6];
 787         } index_entry;
 788         char psar_sig[11];
 789         unsigned int t, cd_length, cdimg_base;
 790         unsigned int offsettab[8], psisoimg_offs;
 791         const char *ext = NULL;
 792         int i, ret;
 793
 794         if (strlen(isofile) >= 4)
 795                 ext = isofile + strlen(isofile) - 4;
 796         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 797                 return -1;
 798
 799         numtracks = 0;
 800
 801         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 802         if (ret != sizeof(pbp_hdr)) {
 803                 SysPrintf("failed to read pbp\n");
 804                 goto fail_io;
 805         }
 806
 807         ret = fseek(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 808         if (ret != 0) {
 809                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 810                 goto fail_io;
 811         }
 812
 813         psisoimg_offs = pbp_hdr.psar_offs;
 814         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 815         psar_sig[10] = 0;
 816         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 817                 // multidisk image?
 818                 ret = fseek(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 819                 if (ret != 0) {
 820                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 821                         goto fail_io;
 822                 }
 823
 824                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 825                         SysPrintf("failed to read offsettab\n");
 826                         goto fail_io;
 827                 }
 828
 829                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 830                         if (offsettab[i] == 0)
 831                                 break;
 832                 }
 833                 cdrIsoMultidiskCount = i;
 834                 if (cdrIsoMultidiskCount == 0) {
 835                         SysPrintf("multidisk eboot has 0 images?\n");
 836                         goto fail_io;
 837                 }
 838
 839                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 840                         cdrIsoMultidiskSelect = 0;
 841
 842                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 843
 844                 ret = fseek(cdHandle, psisoimg_offs, SEEK_SET);
 845                 if (ret != 0) {
 846                         SysPrintf("failed to seek to %x\n", psisoimg_offs);
 847                         goto fail_io;
 848                 }
 849
 850                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 851                 psar_sig[10] = 0;
 852         }
 853
 854         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 855                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 856                 goto fail_io;
 857         }
 858
 859         // seek to TOC
 860         ret = fseek(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 861         if (ret != 0) {
 862                 SysPrintf("failed to seek to %x\n", psisoimg_offs + 0x800);
 863                 goto fail_io;
 864         }
 865
 866         // first 3 entries are special
 867         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 868         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 869         numtracks = btoi(toc_entry.index1[0]);
 870
 871         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 872         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 873                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 874
 875         for (i = 1; i <= numtracks; i++) {
 876                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 877
 878                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 879
 880                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 881                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 882                 ti[i].start_offset *= 2352;
 883                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 884                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 885                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 886
 887                 if (i > 1) {
 888                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 889                         sec2msf(t, ti[i - 1].length);
 890                 }
 891         }
 892         t = cd_length - ti[numtracks].start_offset / 2352;
 893         sec2msf(t, ti[numtracks].length);
 894
 895         // seek to ISO index
 896         ret = fseek(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 897         if (ret != 0) {
 898                 SysPrintf("failed to seek to ISO index\n");
 899                 goto fail_io;
 900         }
 901
 902         compr_img = calloc(1, sizeof(*compr_img));
 903         if (compr_img == NULL)
 904                 goto fail_io;
 905
 906         compr_img->block_shift = 4;
 907         compr_img->current_block = (unsigned int)-1;
 908
 909         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 910         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 911         if (compr_img->index_table == NULL)
 912                 goto fail_io;
 913
 914         cdimg_base = psisoimg_offs + 0x100000;
 915         for (i = 0; i < compr_img->index_len; i++) {
 916                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 917                 if (ret != sizeof(index_entry)) {
 918                         SysPrintf("failed to read index_entry #%d\n", i);
 919                         goto fail_index;
 920                 }
 921
 922                 if (index_entry.size == 0)
 923                         break;
 924
 925                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 926         }
 927         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 928
 929         return 0;
 930
 931 fail_index:
 932         free(compr_img->index_table);
 933         compr_img->index_table = NULL;
 934 fail_io:
 935         if (compr_img != NULL) {
 936                 free(compr_img);
 937                 compr_img = NULL;
 938         }
 939         return -1;
 940 }
 941
 942 static int handlecbin(const char *isofile) {
 943         struct
 944         {
 945                 char magic[4];
 946                 unsigned int header_size;
 947                 unsigned long long total_bytes;
 948                 unsigned int block_size;
 949                 unsigned char ver;              // 1
 950                 unsigned char align;
 951                 unsigned char rsv_06[2];
 952         } ciso_hdr;
 953         const char *ext = NULL;
 954         unsigned int index = 0, plain;
 955         int i, ret;
 956
 957         if (strlen(isofile) >= 5)
 958                 ext = isofile + strlen(isofile) - 5;
 959         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 960                 return -1;
 961
 962         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 963         if (ret != sizeof(ciso_hdr)) {
 964                 SysPrintf("failed to read ciso header\n");
 965                 return -1;
 966         }
 967
 968         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 969                 SysPrintf("bad ciso header\n");
 970                 return -1;
 971         }
 972         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 973                 ret = fseek(cdHandle, ciso_hdr.header_size, SEEK_SET);
 974                 if (ret != 0) {
 975                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 976                         return -1;
 977                 }
 978         }
 979
 980         compr_img = calloc(1, sizeof(*compr_img));
 981         if (compr_img == NULL)
 982                 goto fail_io;
 983
 984         compr_img->block_shift = 0;
 985         compr_img->current_block = (unsigned int)-1;
 986
 987         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
 988         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 989         if (compr_img->index_table == NULL)
 990                 goto fail_io;
 991
 992         ret = fread(compr_img->index_table, sizeof(compr_img->index_table[0]), compr_img->index_len, cdHandle);
 993         if (ret != compr_img->index_len) {
 994                 SysPrintf("failed to read index table\n");
 995                 goto fail_index;
 996         }
 997
 998         for (i = 0; i < compr_img->index_len + 1; i++) {
 999                 index = compr_img->index_table[i];
1000                 plain = index & 0x80000000;
1001                 index &= 0x7fffffff;
1002                 compr_img->index_table[i] = (index << ciso_hdr.align) | plain;
1003         }
1004         if ((long long)index << ciso_hdr.align >= 0x80000000ll)
1005                 SysPrintf("warning: ciso img too large, expect problems\n");
1006
1007         return 0;
1008
1009 fail_index:
1010         free(compr_img->index_table);
1011         compr_img->index_table = NULL;
1012 fail_io:
1013         if (compr_img != NULL) {
1014                 free(compr_img);
1015                 compr_img = NULL;
1016         }
1017         return -1;
1018 }
1019
1020 // this function tries to get the .sub file of the given .img
1021 static int opensubfile(const char *isoname) {
1022         char            subname[MAXPATHLEN];
1023
1024         // copy name of the iso and change extension from .img to .sub
1025         strncpy(subname, isoname, sizeof(subname));
1026         subname[MAXPATHLEN - 1] = '\0';
1027         if (strlen(subname) >= 4) {
1028                 strcpy(subname + strlen(subname) - 4, ".sub");
1029         }
1030         else {
1031                 return -1;
1032         }
1033
1034         subHandle = fopen(subname, "rb");
1035         if (subHandle == NULL) {
1036                 return -1;
1037         }
1038
1039         return 0;
1040 }
1041
1042 static int opensbifile(const char *isoname) {
1043         char            sbiname[MAXPATHLEN];
1044         int             s;
1045
1046         strncpy(sbiname, isoname, sizeof(sbiname));
1047         sbiname[MAXPATHLEN - 1] = '\0';
1048         if (strlen(sbiname) >= 4) {
1049                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1050         }
1051         else {
1052                 return -1;
1053         }
1054
1055         fseek(cdHandle, 0, SEEK_END);
1056         s = ftell(cdHandle) / 2352;
1057
1058         return LoadSBI(sbiname, s);
1059 }
1060
1061 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1062 {
1063         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1064         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1065 }
1066
1067 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1068 {
1069         int ret;
1070
1071         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1072         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1073         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1074
1075         if (subChanRaw) DecodeRawSubData();
1076
1077         return ret;
1078 }
1079
1080 static int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1081 {
1082         static z_stream z;
1083         int ret = 0;
1084
1085         if (z.zalloc == NULL) {
1086                 // XXX: one-time leak here..
1087                 z.next_in = Z_NULL;
1088                 z.avail_in = 0;
1089                 z.zalloc = Z_NULL;
1090                 z.zfree = Z_NULL;
1091                 z.opaque = Z_NULL;
1092                 ret = inflateInit2(&z, -15);
1093         }
1094         else
1095                 ret = inflateReset(&z);
1096         if (ret != Z_OK)
1097                 return ret;
1098
1099         z.next_in = in;
1100         z.avail_in = in_size;
1101         z.next_out = out;
1102         z.avail_out = *out_size;
1103
1104         ret = inflate(&z, Z_NO_FLUSH);
1105         //inflateEnd(&z);
1106
1107         *out_size -= z.avail_out;
1108         return ret == 1 ? 0 : ret;
1109 }
1110
1111 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1112 {
1113         unsigned long cdbuffer_size, cdbuffer_size_expect;
1114         unsigned int start_byte, size;
1115         int is_compressed;
1116         int ret, block;
1117
1118         if (base)
1119                 sector += base / 2352;
1120
1121         block = sector >> compr_img->block_shift;
1122         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1123
1124         if (block == compr_img->current_block) {
1125                 //printf("hit sect %d\n", sector);
1126                 goto finish;
1127         }
1128
1129         if (sector >= compr_img->index_len * 16) {
1130                 SysPrintf("sector %d is past img end\n", sector);
1131                 return -1;
1132         }
1133
1134         start_byte = compr_img->index_table[block] & 0x7fffffff;
1135         if (fseek(cdHandle, start_byte, SEEK_SET) != 0) {
1136                 SysPrintf("seek error for block %d at %x: ",
1137                         block, start_byte);
1138                 perror(NULL);
1139                 return -1;
1140         }
1141
1142         is_compressed = !(compr_img->index_table[block] & 0x80000000);
1143         size = (compr_img->index_table[block + 1] & 0x7fffffff) - start_byte;
1144         if (size > sizeof(compr_img->buff_compressed)) {
1145                 SysPrintf("block %d is too large: %u\n", block, size);
1146                 return -1;
1147         }
1148
1149         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1150                                 1, size, cdHandle) != size) {
1151                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1152                 perror(NULL);
1153                 return -1;
1154         }
1155
1156         if (is_compressed) {
1157                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1158                 cdbuffer_size = cdbuffer_size_expect;
1159                 ret = uncompress2(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1160                 if (ret != 0) {
1161                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1162                                         ret, block, sector);
1163                         return -1;
1164                 }
1165                 if (cdbuffer_size != cdbuffer_size_expect)
1166                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1167                                         cdbuffer_size_expect, sector);
1168         }
1169
1170         // done at last!
1171         compr_img->current_block = block;
1172
1173 finish:
1174         if (dest != cdbuffer) // copy avoid HACK
1175                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1176                         CD_FRAMESIZE_RAW);
1177         return CD_FRAMESIZE_RAW;
1178 }
1179
1180 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1181 {
1182         int ret;
1183
1184         fseek(f, base + sector * 2048, SEEK_SET);
1185         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1186
1187         // not really necessary, fake mode 2 header
1188         memset(cdbuffer, 0, 12 * 2);
1189         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1190         cdbuffer[12 + 3] = 1;
1191
1192         return ret;
1193 }
1194
1195 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1196         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1197 }
1198
1199 static unsigned char * CALLBACK ISOgetBuffer(void) {
1200         return cdbuffer + 12;
1201 }
1202
1203 static void PrintTracks(void) {
1204         int i;
1205
1206         for (i = 1; i <= numtracks; i++) {
1207                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1208                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1209                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1210                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1211         }
1212 }
1213
1214 // This function is invoked by the front-end when opening an ISO
1215 // file for playback
1216 static long CALLBACK ISOopen(void) {
1217         boolean isMode1ISO = FALSE;
1218
1219         if (cdHandle != NULL) {
1220                 return 0; // it's already open
1221         }
1222
1223         cdHandle = fopen(GetIsoFile(), "rb");
1224         if (cdHandle == NULL) {
1225                 return -1;
1226         }
1227
1228         SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1229
1230         cddaBigEndian = FALSE;
1231         subChanMixed = FALSE;
1232         subChanRaw = FALSE;
1233         pregapOffset = 0;
1234         cdrIsoMultidiskCount = 1;
1235         multifile = 0;
1236
1237         CDR_getBuffer = ISOgetBuffer;
1238         cdimg_read_func = cdread_normal;
1239
1240         if (parsetoc(GetIsoFile()) == 0) {
1241                 SysPrintf("[+toc]");
1242         }
1243         else if (parseccd(GetIsoFile()) == 0) {
1244                 SysPrintf("[+ccd]");
1245         }
1246         else if (parsemds(GetIsoFile()) == 0) {
1247                 SysPrintf("[+mds]");
1248         }
1249         else if (parsecue(GetIsoFile()) == 0) {
1250                 SysPrintf("[+cue]");
1251         }
1252         if (handlepbp(GetIsoFile()) == 0) {
1253                 SysPrintf("[pbp]");
1254                 CDR_getBuffer = ISOgetBuffer_compr;
1255                 cdimg_read_func = cdread_compressed;
1256         }
1257         else if (handlecbin(GetIsoFile()) == 0) {
1258                 SysPrintf("[cbin]");
1259                 CDR_getBuffer = ISOgetBuffer_compr;
1260                 cdimg_read_func = cdread_compressed;
1261         }
1262
1263         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1264                 SysPrintf("[+sub]");
1265         }
1266         if (opensbifile(GetIsoFile()) == 0) {
1267                 SysPrintf("[+sbi]");
1268         }
1269
1270         fseek(cdHandle, 0, SEEK_END);
1271
1272         // maybe user selected metadata file instead of main .bin ..
1273         if (ftell(cdHandle) < 2352 * 0x10) {
1274                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1275                 char tmp[MAXPATHLEN], *p;
1276                 FILE *tmpf;
1277                 size_t i;
1278
1279                 strncpy(tmp, GetIsoFile(), sizeof(tmp));
1280                 tmp[MAXPATHLEN - 1] = '\0';
1281                 if (strlen(tmp) >= 4) {
1282                         p = tmp + strlen(tmp) - 4;
1283                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1284                                 strcpy(p, exts[i]);
1285                                 tmpf = fopen(tmp, "rb");
1286                                 if (tmpf != NULL) {
1287                                         fclose(cdHandle);
1288                                         cdHandle = tmpf;
1289                                         fseek(cdHandle, 0, SEEK_END);
1290                                         break;
1291                                 }
1292                         }
1293                 }
1294         }
1295
1296         // guess whether it is mode1/2048
1297         if (ftell(cdHandle) % 2048 == 0) {
1298                 unsigned int modeTest = 0;
1299                 fseek(cdHandle, 0, SEEK_SET);
1300                 fread(&modeTest, 4, 1, cdHandle);
1301                 if (SWAP32(modeTest) != 0xffffff00) {
1302                         SysPrintf("[2048]");
1303                         isMode1ISO = TRUE;
1304                 }
1305         }
1306         fseek(cdHandle, 0, SEEK_SET);
1307
1308         SysPrintf(".\n");
1309
1310         PrintTracks();
1311
1312         if (subChanMixed)
1313                 cdimg_read_func = cdread_sub_mixed;
1314         else if (isMode1ISO)
1315                 cdimg_read_func = cdread_2048;
1316
1317         // make sure we have another handle open for cdda
1318         if (numtracks > 1 && ti[1].handle == NULL) {
1319                 ti[1].handle = fopen(GetIsoFile(), "rb");
1320         }
1321         cdda_cur_sector = 0;
1322         cdda_file_offset = 0;
1323
1324         return 0;
1325 }
1326
1327 static long CALLBACK ISOclose(void) {
1328         int i;
1329
1330         if (cdHandle != NULL) {
1331                 fclose(cdHandle);
1332                 cdHandle = NULL;
1333         }
1334         if (subHandle != NULL) {
1335                 fclose(subHandle);
1336                 subHandle = NULL;
1337         }
1338         stopCDDA();
1339         cddaHandle = NULL;
1340
1341         if (compr_img != NULL) {
1342                 free(compr_img->index_table);
1343                 free(compr_img);
1344                 compr_img = NULL;
1345         }
1346
1347         for (i = 1; i <= numtracks; i++) {
1348                 if (ti[i].handle != NULL) {
1349                         fclose(ti[i].handle);
1350                         ti[i].handle = NULL;
1351                 }
1352         }
1353         numtracks = 0;
1354         ti[1].type = 0;
1355         UnloadSBI();
1356
1357         memset(cdbuffer, 0, sizeof(cdbuffer));
1358         CDR_getBuffer = ISOgetBuffer;
1359
1360         return 0;
1361 }
1362
1363 static long CALLBACK ISOinit(void) {
1364         assert(cdHandle == NULL);
1365         assert(subHandle == NULL);
1366
1367         return 0; // do nothing
1368 }
1369
1370 static long CALLBACK ISOshutdown(void) {
1371         ISOclose();
1372         return 0;
1373 }
1374
1375 // return Starting and Ending Track
1376 // buffer:
1377 //  byte 0 - start track
1378 //  byte 1 - end track
1379 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1380         buffer[0] = 1;
1381
1382         if (numtracks > 0) {
1383                 buffer[1] = numtracks;
1384         }
1385         else {
1386                 buffer[1] = 1;
1387         }
1388
1389         return 0;
1390 }
1391
1392 // return Track Time
1393 // buffer:
1394 //  byte 0 - frame
1395 //  byte 1 - second
1396 //  byte 2 - minute
1397 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1398         if (track == 0) {
1399                 unsigned int sect;
1400                 unsigned char time[3];
1401                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1402                 sec2msf(sect, (char *)time);
1403                 buffer[2] = time[0];
1404                 buffer[1] = time[1];
1405                 buffer[0] = time[2];
1406         }
1407         else if (numtracks > 0 && track <= numtracks) {
1408                 buffer[2] = ti[track].start[0];
1409                 buffer[1] = ti[track].start[1];
1410                 buffer[0] = ti[track].start[2];
1411         }
1412         else {
1413                 buffer[2] = 0;
1414                 buffer[1] = 2;
1415                 buffer[0] = 0;
1416         }
1417
1418         return 0;
1419 }
1420
1421 // decode 'raw' subchannel data ripped by cdrdao
1422 static void DecodeRawSubData(void) {
1423         unsigned char subQData[12];
1424         int i;
1425
1426         memset(subQData, 0, sizeof(subQData));
1427
1428         for (i = 0; i < 8 * 12; i++) {
1429                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1430                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1431                 }
1432         }
1433
1434         memcpy(&subbuffer[12], subQData, 12);
1435 }
1436
1437 // read track
1438 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1439 // uses bcd format
1440 static long CALLBACK ISOreadTrack(unsigned char *time) {
1441         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1442         long ret;
1443
1444         if (cdHandle == NULL) {
1445                 return -1;
1446         }
1447
1448         if (pregapOffset) {
1449                 subChanMissing = FALSE;
1450                 if (sector >= pregapOffset) {
1451                         sector -= 2 * 75;
1452                         if (sector < pregapOffset)
1453                                 subChanMissing = TRUE;
1454                 }
1455         }
1456
1457         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1458         if (ret < 0)
1459                 return -1;
1460
1461         if (subHandle != NULL) {
1462                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1463                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1464
1465                 if (subChanRaw) DecodeRawSubData();
1466         }
1467
1468         return 0;
1469 }
1470
1471 // plays cdda audio
1472 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1473 // does NOT uses bcd format
1474 static long CALLBACK ISOplay(unsigned char *time) {
1475         unsigned int i;
1476
1477         if (numtracks <= 1)
1478                 return 0;
1479
1480         // find the track
1481         cdda_cur_sector = msf2sec((char *)time);
1482         for (i = numtracks; i > 1; i--) {
1483                 cdda_first_sector = msf2sec(ti[i].start);
1484                 if (cdda_first_sector <= cdda_cur_sector + 2 * 75)
1485                         break;
1486         }
1487         cdda_file_offset = ti[i].start_offset;
1488
1489         // find the file that contains this track
1490         for (; i > 1; i--)
1491                 if (ti[i].handle != NULL)
1492                         break;
1493
1494         cddaHandle = ti[i].handle;
1495
1496         if (SPU_playCDDAchannel != NULL)
1497                 startCDDA();
1498
1499         return 0;
1500 }
1501
1502 // stops cdda audio
1503 static long CALLBACK ISOstop(void) {
1504         stopCDDA();
1505         return 0;
1506 }
1507
1508 // gets subchannel data
1509 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1510         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1511                 return subbuffer;
1512         }
1513
1514         return NULL;
1515 }
1516
1517 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1518         u32 sect;
1519
1520         CDR__getStatus(stat);
1521
1522         if (playing) {
1523                 stat->Type = 0x02;
1524                 stat->Status |= 0x80;
1525         }
1526         else {
1527                 // BIOS - boot ID (CD type)
1528                 stat->Type = ti[1].type;
1529         }
1530
1531         // relative -> absolute time
1532         sect = cddaCurPos;
1533         sec2msf(sect, (char *)stat->Time);
1534
1535         return 0;
1536 }
1537
1538 // read CDDA sector into buffer
1539 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1540         unsigned char msf[3] = {m, s, f};
1541         unsigned int file, track, track_start = 0;
1542         int ret;
1543
1544         cddaCurPos = msf2sec((char *)msf);
1545
1546         // find current track index
1547         for (track = numtracks; ; track--) {
1548                 track_start = msf2sec(ti[track].start);
1549                 if (track_start <= cddaCurPos)
1550                         break;
1551                 if (track == 1)
1552                         break;
1553         }
1554
1555         // data tracks play silent
1556         if (ti[track].type != CDDA) {
1557                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1558                 return 0;
1559         }
1560
1561         file = 1;
1562         if (multifile) {
1563                 // find the file that contains this track
1564                 for (file = track; file > 1; file--)
1565                         if (ti[file].handle != NULL)
1566                                 break;
1567         }
1568
1569         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1570                 buffer, cddaCurPos - track_start);
1571         if (ret != CD_FRAMESIZE_RAW) {
1572                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1573                 return -1;
1574         }
1575
1576         if (cddaBigEndian) {
1577                 int i;
1578                 unsigned char tmp;
1579
1580                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1581                         tmp = buffer[i * 2];
1582                         buffer[i * 2] = buffer[i * 2 + 1];
1583                         buffer[i * 2 + 1] = tmp;
1584                 }
1585         }
1586
1587         return 0;
1588 }
1589
1590 void cdrIsoInit(void) {
1591         CDR_init = ISOinit;
1592         CDR_shutdown = ISOshutdown;
1593         CDR_open = ISOopen;
1594         CDR_close = ISOclose;
1595         CDR_getTN = ISOgetTN;
1596         CDR_getTD = ISOgetTD;
1597         CDR_readTrack = ISOreadTrack;
1598         CDR_getBuffer = ISOgetBuffer;
1599         CDR_play = ISOplay;
1600         CDR_stop = ISOstop;
1601         CDR_getBufferSub = ISOgetBufferSub;
1602         CDR_getStatus = ISOgetStatus;
1603         CDR_readCDDA = ISOreadCDDA;
1604
1605         CDR_getDriveLetter = CDR__getDriveLetter;
1606         CDR_configure = CDR__configure;
1607         CDR_test = CDR__test;
1608         CDR_about = CDR__about;
1609         CDR_setfilename = CDR__setfilename;
1610
1611         numtracks = 0;
1612 }
1613
1614 int cdrIsoActive(void) {
1615         return (cdHandle != NULL);
1616 }