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 #include <errno.h>
  29 #include <zlib.h>
  30
  31 #ifdef _WIN32
  32 #define WIN32_LEAN_AND_MEAN
  33 #include <process.h>
  34 #include <windows.h>
  35 #define strcasecmp _stricmp
  36 #define usleep(x) (Sleep((x) / 1000))
  37 #else
  38 #include <pthread.h>
  39 #include <sys/time.h>
  40 #include <unistd.h>
  41 #endif
  42
  43 #define OFF_T_MSB ((off_t)1 << (sizeof(off_t) * 8 - 1))
  44
  45 unsigned int cdrIsoMultidiskCount;
  46 unsigned int cdrIsoMultidiskSelect;
  47
  48 static FILE *cdHandle = NULL;
  49 static FILE *cddaHandle = NULL;
  50 static FILE *subHandle = NULL;
  51
  52 static boolean subChanMixed = FALSE;
  53 static boolean subChanRaw = FALSE;
  54 static boolean subChanMissing = FALSE;
  55
  56 static boolean multifile = FALSE;
  57
  58 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
  59 static unsigned char subbuffer[SUB_FRAMESIZE];
  60
  61 static unsigned char sndbuffer[CD_FRAMESIZE_RAW * 10];
  62
  63 #define CDDA_FRAMETIME                  (1000 * (sizeof(sndbuffer) / CD_FRAMESIZE_RAW) / 75)
  64
  65 #ifdef _WIN32
  66 static HANDLE threadid;
  67 #else
  68 static pthread_t threadid;
  69 #endif
  70 static unsigned int initial_offset = 0;
  71 static boolean playing = FALSE;
  72 static boolean cddaBigEndian = FALSE;
  73 // cdda sectors in toc, byte offset in file
  74 static unsigned int cdda_cur_sector;
  75 static unsigned int cdda_first_sector;
  76 static unsigned int cdda_file_offset;
  77 /* Frame offset into CD image where pregap data would be found if it was there.
  78  * If a game seeks there we must *not* return subchannel data since it's
  79  * not in the CD image, so that cdrom code can fake subchannel data instead.
  80  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  81 static unsigned int pregapOffset;
  82
  83 #define cddaCurPos cdda_cur_sector
  84
  85 // compressed image stuff
  86 static struct {
  87         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  88         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  89         off_t *index_table;
  90         unsigned int index_len;
  91         unsigned int block_shift;
  92         unsigned int current_block;
  93         unsigned int sector_in_blk;
  94 } *compr_img;
  95
  96 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
  97
  98 char* CALLBACK CDR__getDriveLetter(void);
  99 long CALLBACK CDR__configure(void);
 100 long CALLBACK CDR__test(void);
 101 void CALLBACK CDR__about(void);
 102 long CALLBACK CDR__setfilename(char *filename);
 103 long CALLBACK CDR__getStatus(struct CdrStat *stat);
 104
 105 static void DecodeRawSubData(void);
 106
 107 struct trackinfo {
 108         enum {DATA=1, CDDA} type;
 109         char start[3];          // MSF-format
 110         char length[3];         // MSF-format
 111         FILE *handle;           // for multi-track images CDDA
 112         unsigned int start_offset; // byte offset from start of above file
 113 };
 114
 115 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 116
 117 static int numtracks = 0;
 118 static struct trackinfo ti[MAXTRACKS];
 119
 120 // get a sector from a msf-array
 121 static unsigned int msf2sec(char *msf) {
 122         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 123 }
 124
 125 static void sec2msf(unsigned int s, char *msf) {
 126         msf[0] = s / 75 / 60;
 127         s = s - msf[0] * 75 * 60;
 128         msf[1] = s / 75;
 129         s = s - msf[1] * 75;
 130         msf[2] = s;
 131 }
 132
 133 // divide a string of xx:yy:zz into m, s, f
 134 static void tok2msf(char *time, char *msf) {
 135         char *token;
 136
 137         token = strtok(time, ":");
 138         if (token) {
 139                 msf[0] = atoi(token);
 140         }
 141         else {
 142                 msf[0] = 0;
 143         }
 144
 145         token = strtok(NULL, ":");
 146         if (token) {
 147                 msf[1] = atoi(token);
 148         }
 149         else {
 150                 msf[1] = 0;
 151         }
 152
 153         token = strtok(NULL, ":");
 154         if (token) {
 155                 msf[2] = atoi(token);
 156         }
 157         else {
 158                 msf[2] = 0;
 159         }
 160 }
 161
 162 #ifndef _WIN32
 163 static long GetTickCount(void) {
 164         static time_t           initial_time = 0;
 165         struct timeval          now;
 166
 167         gettimeofday(&now, NULL);
 168
 169         if (initial_time == 0) {
 170                 initial_time = now.tv_sec;
 171         }
 172
 173         return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
 174 }
 175 #endif
 176
 177 // this thread plays audio data
 178 #ifdef _WIN32
 179 static void playthread(void *param)
 180 #else
 181 static void *playthread(void *param)
 182 #endif
 183 {
 184         long osleep, d, t, i, s;
 185         unsigned char   tmp;
 186         int ret = 0, sector_offs;
 187
 188         t = GetTickCount();
 189
 190         while (playing) {
 191                 s = 0;
 192                 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
 193                         sector_offs = cdda_cur_sector - cdda_first_sector;
 194                         if (sector_offs < 0) {
 195                                 d = CD_FRAMESIZE_RAW;
 196                                 memset(sndbuffer + s, 0, d);
 197                         }
 198                         else {
 199                                 d = cdimg_read_func(cddaHandle, cdda_file_offset,
 200                                         sndbuffer + s, sector_offs);
 201                                 if (d < CD_FRAMESIZE_RAW)
 202                                         break;
 203                         }
 204
 205                         s += d;
 206                         cdda_cur_sector++;
 207                 }
 208
 209                 if (s == 0) {
 210                         playing = FALSE;
 211                         initial_offset = 0;
 212                         break;
 213                 }
 214
 215                 if (!cdr.Muted && playing) {
 216                         if (cddaBigEndian) {
 217                                 for (i = 0; i < s / 2; i++) {
 218                                         tmp = sndbuffer[i * 2];
 219                                         sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
 220                                         sndbuffer[i * 2 + 1] = tmp;
 221                                 }
 222                         }
 223
 224                         // can't do it yet due to readahead..
 225                         //cdrAttenuate((short *)sndbuffer, s / 4, 1);
 226                         do {
 227                                 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
 228                                 if (ret == 0x7761)
 229             {
 230                                         usleep(6 * 1000);
 231             }
 232                         } while (ret == 0x7761 && playing); // rearmed_wait
 233                 }
 234
 235                 if (ret != 0x676f) { // !rearmed_go
 236                         // do approx sleep
 237                         long now;
 238
 239                         // HACK: stop feeding data while emu is paused
 240                         extern int stop;
 241                         while (stop && playing)
 242          {
 243                                 usleep(10000);
 244          }
 245
 246                         now = GetTickCount();
 247                         osleep = t - now;
 248                         if (osleep <= 0) {
 249                                 osleep = 1;
 250                                 t = now;
 251                         }
 252                         else if (osleep > CDDA_FRAMETIME) {
 253                                 osleep = CDDA_FRAMETIME;
 254                                 t = now;
 255                         }
 256
 257                         usleep(osleep * 1000);
 258                         t += CDDA_FRAMETIME;
 259                 }
 260
 261         }
 262
 263 #ifdef _WIN32
 264         _endthread();
 265 #else
 266         pthread_exit(0);
 267         return NULL;
 268 #endif
 269 }
 270
 271 // stop the CDDA playback
 272 static void stopCDDA() {
 273         if (!playing) {
 274                 return;
 275         }
 276
 277         playing = FALSE;
 278 #ifdef _WIN32
 279         WaitForSingleObject(threadid, INFINITE);
 280 #else
 281         pthread_join(threadid, NULL);
 282 #endif
 283 }
 284
 285 // start the CDDA playback
 286 static void startCDDA(void) {
 287         if (playing) {
 288                 stopCDDA();
 289         }
 290
 291         playing = TRUE;
 292
 293 #ifdef _WIN32
 294         threadid = (HANDLE)_beginthread(playthread, 0, NULL);
 295 #else
 296         pthread_create(&threadid, NULL, playthread, NULL);
 297 #endif
 298 }
 299
 300 // this function tries to get the .toc file of the given .bin
 301 // the necessary data is put into the ti (trackinformation)-array
 302 static int parsetoc(const char *isofile) {
 303         char                    tocname[MAXPATHLEN];
 304         FILE                    *fi;
 305         char                    linebuf[256], tmp[256], name[256];
 306         char                    *token;
 307         char                    time[20], time2[20];
 308         unsigned int    t, sector_offs, sector_size;
 309         unsigned int    current_zero_gap = 0;
 310
 311         numtracks = 0;
 312
 313         // copy name of the iso and change extension from .bin to .toc
 314         strncpy(tocname, isofile, sizeof(tocname));
 315         tocname[MAXPATHLEN - 1] = '\0';
 316         if (strlen(tocname) >= 4) {
 317                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 318         }
 319         else {
 320                 return -1;
 321         }
 322
 323         if ((fi = fopen(tocname, "r")) == NULL) {
 324                 // try changing extension to .cue (to satisfy some stupid tutorials)
 325                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 326                 if ((fi = fopen(tocname, "r")) == NULL) {
 327                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 328                         strcpy(tocname, isofile);
 329                         t = strlen(tocname);
 330                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 331                                 tocname[t - 4] = '\0';
 332                                 if ((fi = fopen(tocname, "r")) == NULL) {
 333                                         return -1;
 334                                 }
 335                         }
 336                         else {
 337                                 return -1;
 338                         }
 339                 }
 340                 // check if it's really a TOC named as a .cue
 341                 fgets(linebuf, sizeof(linebuf), fi);
 342                 token = strtok(linebuf, " ");
 343                 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 344                         fclose(fi);
 345                         return -1;
 346                 }
 347                 fseek(fi, 0, SEEK_SET);
 348         }
 349
 350         memset(&ti, 0, sizeof(ti));
 351         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 352
 353         sector_size = CD_FRAMESIZE_RAW;
 354         sector_offs = 2 * 75;
 355
 356         // parse the .toc file
 357         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 358                 // search for tracks
 359                 strncpy(tmp, linebuf, sizeof(linebuf));
 360                 token = strtok(tmp, " ");
 361
 362                 if (token == NULL) continue;
 363
 364                 if (!strcmp(token, "TRACK")) {
 365                         sector_offs += current_zero_gap;
 366                         current_zero_gap = 0;
 367
 368                         // get type of track
 369                         token = strtok(NULL, " ");
 370                         numtracks++;
 371
 372                         if (!strncmp(token, "MODE2_RAW", 9)) {
 373                                 ti[numtracks].type = DATA;
 374                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 375
 376                                 // check if this image contains mixed subchannel data
 377                                 token = strtok(NULL, " ");
 378                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 379                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 380                                         subChanMixed = TRUE;
 381                                         if (!strncmp(token, "RW_RAW", 6))
 382                                                 subChanRaw = TRUE;
 383                                 }
 384                         }
 385                         else if (!strncmp(token, "AUDIO", 5)) {
 386                                 ti[numtracks].type = CDDA;
 387                         }
 388                 }
 389                 else if (!strcmp(token, "DATAFILE")) {
 390                         if (ti[numtracks].type == CDDA) {
 391                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 392                                 ti[numtracks].start_offset = t;
 393                                 t = t / sector_size + sector_offs;
 394                                 sec2msf(t, (char *)&ti[numtracks].start);
 395                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 396                         }
 397                         else {
 398                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 399                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 400                         }
 401                 }
 402                 else if (!strcmp(token, "FILE")) {
 403                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 404                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 405                         t += msf2sec(ti[numtracks].start) * sector_size;
 406                         ti[numtracks].start_offset = t;
 407                         t = t / sector_size + sector_offs;
 408                         sec2msf(t, (char *)&ti[numtracks].start);
 409                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 410                 }
 411                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 412                         // skip unneeded optional fields
 413                         while (token != NULL) {
 414                                 token = strtok(NULL, " ");
 415                                 if (strchr(token, ':') != NULL)
 416                                         break;
 417                         }
 418                         if (token != NULL) {
 419                                 tok2msf(token, tmp);
 420                                 current_zero_gap = msf2sec(tmp);
 421                         }
 422                         if (numtracks > 1) {
 423                                 t = ti[numtracks - 1].start_offset;
 424                                 t /= sector_size;
 425                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 426                         }
 427                 }
 428                 else if (!strcmp(token, "START")) {
 429                         token = strtok(NULL, " ");
 430                         if (token != NULL && strchr(token, ':')) {
 431                                 tok2msf(token, tmp);
 432                                 t = msf2sec(tmp);
 433                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 434                                 t = msf2sec(ti[numtracks].start) + t;
 435                                 sec2msf(t, (char *)&ti[numtracks].start);
 436                         }
 437                 }
 438         }
 439
 440         fclose(fi);
 441
 442         return 0;
 443 }
 444
 445 // this function tries to get the .cue file of the given .bin
 446 // the necessary data is put into the ti (trackinformation)-array
 447 static int parsecue(const char *isofile) {
 448         char                    cuename[MAXPATHLEN];
 449         char                    filepath[MAXPATHLEN];
 450         char                    *incue_fname;
 451         FILE                    *fi;
 452         char                    *token;
 453         char                    time[20];
 454         char                    *tmp;
 455         char                    linebuf[256], tmpb[256], dummy[256];
 456         unsigned int    incue_max_len;
 457         unsigned int    t, file_len, mode, sector_offs;
 458         unsigned int    sector_size = 2352;
 459
 460         numtracks = 0;
 461
 462         // copy name of the iso and change extension from .bin to .cue
 463         strncpy(cuename, isofile, sizeof(cuename));
 464         cuename[MAXPATHLEN - 1] = '\0';
 465         if (strlen(cuename) >= 4) {
 466                 strcpy(cuename + strlen(cuename) - 4, ".cue");
 467         }
 468         else {
 469                 return -1;
 470         }
 471
 472         if ((fi = fopen(cuename, "r")) == NULL) {
 473                 return -1;
 474         }
 475
 476         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 477         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 478         // that...
 479         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 480                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 481                         // Don't proceed further, as this is actually a .toc file rather
 482                         // than a .cue file.
 483                         fclose(fi);
 484                         return parsetoc(isofile);
 485                 }
 486                 fseek(fi, 0, SEEK_SET);
 487         }
 488
 489         // build a path for files referenced in .cue
 490         strncpy(filepath, cuename, sizeof(filepath));
 491         tmp = strrchr(filepath, '/');
 492         if (tmp == NULL)
 493                 tmp = strrchr(filepath, '\\');
 494         if (tmp != NULL)
 495                 tmp++;
 496         else
 497                 tmp = filepath;
 498         *tmp = 0;
 499         filepath[sizeof(filepath) - 1] = 0;
 500         incue_fname = tmp;
 501         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 502
 503         memset(&ti, 0, sizeof(ti));
 504
 505         file_len = 0;
 506         sector_offs = 2 * 75;
 507
 508         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 509                 strncpy(dummy, linebuf, sizeof(linebuf));
 510                 token = strtok(dummy, " ");
 511
 512                 if (token == NULL) {
 513                         continue;
 514                 }
 515
 516                 if (!strcmp(token, "TRACK")) {
 517                         numtracks++;
 518
 519                         sector_size = 0;
 520                         if (strstr(linebuf, "AUDIO") != NULL) {
 521                                 ti[numtracks].type = CDDA;
 522                                 sector_size = 2352;
 523                         }
 524                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 525                                 ti[numtracks].type = DATA;
 526                         else {
 527                                 SysPrintf(".cue: failed to parse TRACK\n");
 528                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 529                         }
 530                         if (sector_size == 0)
 531                                 sector_size = 2352;
 532                 }
 533                 else if (!strcmp(token, "INDEX")) {
 534                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 535                                 SysPrintf(".cue: failed to parse INDEX\n");
 536                         tok2msf(time, (char *)&ti[numtracks].start);
 537
 538                         t = msf2sec(ti[numtracks].start);
 539                         ti[numtracks].start_offset = t * sector_size;
 540                         t += sector_offs;
 541                         sec2msf(t, ti[numtracks].start);
 542
 543                         // default track length to file length
 544                         t = file_len - ti[numtracks].start_offset / sector_size;
 545                         sec2msf(t, ti[numtracks].length);
 546
 547                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 548                                 // this track uses the same file as the last,
 549                                 // start of this track is last track's end
 550                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 551                                 sec2msf(t, ti[numtracks - 1].length);
 552                         }
 553                         if (numtracks > 1 && pregapOffset == -1)
 554                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 555                 }
 556                 else if (!strcmp(token, "PREGAP")) {
 557                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 558                                 tok2msf(time, dummy);
 559                                 sector_offs += msf2sec(dummy);
 560                         }
 561                         pregapOffset = -1; // mark to fill track start_offset
 562                 }
 563                 else if (!strcmp(token, "FILE")) {
 564                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 565                         if (t != 1)
 566                                 sscanf(linebuf, " FILE %255s", tmpb);
 567
 568                         // absolute path?
 569                         ti[numtracks + 1].handle = fopen(tmpb, "rb");
 570                         if (ti[numtracks + 1].handle == NULL) {
 571                                 // relative to .cue?
 572                                 tmp = strrchr(tmpb, '\\');
 573                                 if (tmp == NULL)
 574                                         tmp = strrchr(tmpb, '/');
 575                                 if (tmp != NULL)
 576                                         tmp++;
 577                                 else
 578                                         tmp = tmpb;
 579                                 strncpy(incue_fname, tmp, incue_max_len);
 580                                 ti[numtracks + 1].handle = fopen(filepath, "rb");
 581                         }
 582
 583                         // update global offset if this is not first file in this .cue
 584                         if (numtracks + 1 > 1) {
 585                                 multifile = 1;
 586                                 sector_offs += file_len;
 587                         }
 588
 589                         file_len = 0;
 590                         if (ti[numtracks + 1].handle == NULL) {
 591                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 592                                 continue;
 593                         }
 594                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 595                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 596
 597                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 598                                 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
 599                         {
 600                                 // user selected .cue as image file, use it's data track instead
 601                                 fclose(cdHandle);
 602                                 cdHandle = fopen(filepath, "rb");
 603                         }
 604                 }
 605         }
 606
 607         fclose(fi);
 608
 609         return 0;
 610 }
 611
 612 // this function tries to get the .ccd file of the given .img
 613 // the necessary data is put into the ti (trackinformation)-array
 614 static int parseccd(const char *isofile) {
 615         char                    ccdname[MAXPATHLEN];
 616         FILE                    *fi;
 617         char                    linebuf[256];
 618         unsigned int    t;
 619
 620         numtracks = 0;
 621
 622         // copy name of the iso and change extension from .img to .ccd
 623         strncpy(ccdname, isofile, sizeof(ccdname));
 624         ccdname[MAXPATHLEN - 1] = '\0';
 625         if (strlen(ccdname) >= 4) {
 626                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 627         }
 628         else {
 629                 return -1;
 630         }
 631
 632         if ((fi = fopen(ccdname, "r")) == NULL) {
 633                 return -1;
 634         }
 635
 636         memset(&ti, 0, sizeof(ti));
 637
 638         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 639                 if (!strncmp(linebuf, "[TRACK", 6)){
 640                         numtracks++;
 641                 }
 642                 else if (!strncmp(linebuf, "MODE=", 5)) {
 643                         sscanf(linebuf, "MODE=%d", &t);
 644                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 645                 }
 646                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 647                         sscanf(linebuf, "INDEX 1=%d", &t);
 648                         sec2msf(t + 2 * 75, ti[numtracks].start);
 649                         ti[numtracks].start_offset = t * 2352;
 650
 651                         // If we've already seen another track, this is its end
 652                         if (numtracks > 1) {
 653                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 654                                 sec2msf(t, ti[numtracks - 1].length);
 655                         }
 656                 }
 657         }
 658
 659         fclose(fi);
 660
 661         // Fill out the last track's end based on size
 662         if (numtracks >= 1) {
 663                 fseek(cdHandle, 0, SEEK_END);
 664                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 665                 sec2msf(t, ti[numtracks].length);
 666         }
 667
 668         return 0;
 669 }
 670
 671 // this function tries to get the .mds file of the given .mdf
 672 // the necessary data is put into the ti (trackinformation)-array
 673 static int parsemds(const char *isofile) {
 674         char                    mdsname[MAXPATHLEN];
 675         FILE                    *fi;
 676         unsigned int    offset, extra_offset, l, i;
 677         unsigned short  s;
 678
 679         numtracks = 0;
 680
 681         // copy name of the iso and change extension from .mdf to .mds
 682         strncpy(mdsname, isofile, sizeof(mdsname));
 683         mdsname[MAXPATHLEN - 1] = '\0';
 684         if (strlen(mdsname) >= 4) {
 685                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 686         }
 687         else {
 688                 return -1;
 689         }
 690
 691         if ((fi = fopen(mdsname, "rb")) == NULL) {
 692                 return -1;
 693         }
 694
 695         memset(&ti, 0, sizeof(ti));
 696
 697         // check if it's a valid mds file
 698         fread(&i, 1, sizeof(unsigned int), fi);
 699         i = SWAP32(i);
 700         if (i != 0x4944454D) {
 701                 // not an valid mds file
 702                 fclose(fi);
 703                 return -1;
 704         }
 705
 706         // get offset to session block
 707         fseek(fi, 0x50, SEEK_SET);
 708         fread(&offset, 1, sizeof(unsigned int), fi);
 709         offset = SWAP32(offset);
 710
 711         // get total number of tracks
 712         offset += 14;
 713         fseek(fi, offset, SEEK_SET);
 714         fread(&s, 1, sizeof(unsigned short), fi);
 715         s = SWAP16(s);
 716         numtracks = s;
 717
 718         // get offset to track blocks
 719         fseek(fi, 4, SEEK_CUR);
 720         fread(&offset, 1, sizeof(unsigned int), fi);
 721         offset = SWAP32(offset);
 722
 723         // skip lead-in data
 724         while (1) {
 725                 fseek(fi, offset + 4, SEEK_SET);
 726                 if (fgetc(fi) < 0xA0) {
 727                         break;
 728                 }
 729                 offset += 0x50;
 730         }
 731
 732         // check if the image contains mixed subchannel data
 733         fseek(fi, offset + 1, SEEK_SET);
 734         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 735
 736         // read track data
 737         for (i = 1; i <= numtracks; i++) {
 738                 fseek(fi, offset, SEEK_SET);
 739
 740                 // get the track type
 741                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 742                 fseek(fi, 8, SEEK_CUR);
 743
 744                 // get the track starting point
 745                 ti[i].start[0] = fgetc(fi);
 746                 ti[i].start[1] = fgetc(fi);
 747                 ti[i].start[2] = fgetc(fi);
 748
 749                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 750                 extra_offset = SWAP32(extra_offset);
 751
 752                 // get track start offset (in .mdf)
 753                 fseek(fi, offset + 0x28, SEEK_SET);
 754                 fread(&l, 1, sizeof(unsigned int), fi);
 755                 l = SWAP32(l);
 756                 ti[i].start_offset = l;
 757
 758                 // get pregap
 759                 fseek(fi, extra_offset, SEEK_SET);
 760                 fread(&l, 1, sizeof(unsigned int), fi);
 761                 l = SWAP32(l);
 762                 if (l != 0 && i > 1)
 763                         pregapOffset = msf2sec(ti[i].start);
 764
 765                 // get the track length
 766                 fread(&l, 1, sizeof(unsigned int), fi);
 767                 l = SWAP32(l);
 768                 sec2msf(l, ti[i].length);
 769
 770                 offset += 0x50;
 771         }
 772
 773         fclose(fi);
 774         return 0;
 775 }
 776
 777 static int handlepbp(const char *isofile) {
 778         struct {
 779                 unsigned int sig;
 780                 unsigned int dontcare[8];
 781                 unsigned int psar_offs;
 782         } pbp_hdr;
 783         struct {
 784                 unsigned char type;
 785                 unsigned char pad0;
 786                 unsigned char track;
 787                 char index0[3];
 788                 char pad1;
 789                 char index1[3];
 790         } toc_entry;
 791         struct {
 792                 unsigned int offset;
 793                 unsigned int size;
 794                 unsigned int dontcare[6];
 795         } index_entry;
 796         char psar_sig[11];
 797         off_t psisoimg_offs, cdimg_base;
 798         unsigned int t, cd_length;
 799         unsigned int offsettab[8];
 800         const char *ext = NULL;
 801         int i, ret;
 802
 803         if (strlen(isofile) >= 4)
 804                 ext = isofile + strlen(isofile) - 4;
 805         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 806                 return -1;
 807
 808         fseeko(cdHandle, 0, SEEK_SET);
 809
 810         numtracks = 0;
 811
 812         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 813         if (ret != sizeof(pbp_hdr)) {
 814                 SysPrintf("failed to read pbp\n");
 815                 goto fail_io;
 816         }
 817
 818         ret = fseeko(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 819         if (ret != 0) {
 820                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 821                 goto fail_io;
 822         }
 823
 824         psisoimg_offs = pbp_hdr.psar_offs;
 825         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 826         psar_sig[10] = 0;
 827         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 828                 // multidisk image?
 829                 ret = fseeko(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 830                 if (ret != 0) {
 831                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 832                         goto fail_io;
 833                 }
 834
 835                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 836                         SysPrintf("failed to read offsettab\n");
 837                         goto fail_io;
 838                 }
 839
 840                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 841                         if (offsettab[i] == 0)
 842                                 break;
 843                 }
 844                 cdrIsoMultidiskCount = i;
 845                 if (cdrIsoMultidiskCount == 0) {
 846                         SysPrintf("multidisk eboot has 0 images?\n");
 847                         goto fail_io;
 848                 }
 849
 850                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 851                         cdrIsoMultidiskSelect = 0;
 852
 853                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 854
 855                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 856                 if (ret != 0) {
 857                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 858                         goto fail_io;
 859                 }
 860
 861                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 862                 psar_sig[10] = 0;
 863         }
 864
 865         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 866                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 867                 goto fail_io;
 868         }
 869
 870         // seek to TOC
 871         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 872         if (ret != 0) {
 873                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 874                 goto fail_io;
 875         }
 876
 877         // first 3 entries are special
 878         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 879         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 880         numtracks = btoi(toc_entry.index1[0]);
 881
 882         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 883         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 884                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 885
 886         for (i = 1; i <= numtracks; i++) {
 887                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 888
 889                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 890
 891                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 892                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 893                 ti[i].start_offset *= 2352;
 894                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 895                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 896                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 897
 898                 if (i > 1) {
 899                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 900                         sec2msf(t, ti[i - 1].length);
 901                 }
 902         }
 903         t = cd_length - ti[numtracks].start_offset / 2352;
 904         sec2msf(t, ti[numtracks].length);
 905
 906         // seek to ISO index
 907         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 908         if (ret != 0) {
 909                 SysPrintf("failed to seek to ISO index\n");
 910                 goto fail_io;
 911         }
 912
 913         compr_img = calloc(1, sizeof(*compr_img));
 914         if (compr_img == NULL)
 915                 goto fail_io;
 916
 917         compr_img->block_shift = 4;
 918         compr_img->current_block = (unsigned int)-1;
 919
 920         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 921         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 922         if (compr_img->index_table == NULL)
 923                 goto fail_io;
 924
 925         cdimg_base = psisoimg_offs + 0x100000;
 926         for (i = 0; i < compr_img->index_len; i++) {
 927                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 928                 if (ret != sizeof(index_entry)) {
 929                         SysPrintf("failed to read index_entry #%d\n", i);
 930                         goto fail_index;
 931                 }
 932
 933                 if (index_entry.size == 0)
 934                         break;
 935
 936                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 937         }
 938         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 939
 940         return 0;
 941
 942 fail_index:
 943         free(compr_img->index_table);
 944         compr_img->index_table = NULL;
 945 fail_io:
 946         if (compr_img != NULL) {
 947                 free(compr_img);
 948                 compr_img = NULL;
 949         }
 950         return -1;
 951 }
 952
 953 static int handlecbin(const char *isofile) {
 954         struct
 955         {
 956                 char magic[4];
 957                 unsigned int header_size;
 958                 unsigned long long total_bytes;
 959                 unsigned int block_size;
 960                 unsigned char ver;              // 1
 961                 unsigned char align;
 962                 unsigned char rsv_06[2];
 963         } ciso_hdr;
 964         const char *ext = NULL;
 965         unsigned int *index_table = NULL;
 966         unsigned int index = 0, plain;
 967         int i, ret;
 968
 969         if (strlen(isofile) >= 5)
 970                 ext = isofile + strlen(isofile) - 5;
 971         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 972                 return -1;
 973
 974         fseek(cdHandle, 0, SEEK_SET);
 975
 976         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 977         if (ret != sizeof(ciso_hdr)) {
 978                 SysPrintf("failed to read ciso header\n");
 979                 return -1;
 980         }
 981
 982         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 983                 SysPrintf("bad ciso header\n");
 984                 return -1;
 985         }
 986         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 987                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
 988                 if (ret != 0) {
 989                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 990                         return -1;
 991                 }
 992         }
 993
 994         compr_img = calloc(1, sizeof(*compr_img));
 995         if (compr_img == NULL)
 996                 goto fail_io;
 997
 998         compr_img->block_shift = 0;
 999         compr_img->current_block = (unsigned int)-1;
1000
1001         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
1002         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
1003         if (index_table == NULL)
1004                 goto fail_io;
1005
1006         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
1007         if (ret != compr_img->index_len) {
1008                 SysPrintf("failed to read index table\n");
1009                 goto fail_index;
1010         }
1011
1012         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
1013         if (compr_img->index_table == NULL)
1014                 goto fail_index;
1015
1016         for (i = 0; i < compr_img->index_len + 1; i++) {
1017                 index = index_table[i];
1018                 plain = index & 0x80000000;
1019                 index &= 0x7fffffff;
1020                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
1021                 if (plain)
1022                         compr_img->index_table[i] |= OFF_T_MSB;
1023         }
1024
1025         return 0;
1026
1027 fail_index:
1028         free(index_table);
1029 fail_io:
1030         if (compr_img != NULL) {
1031                 free(compr_img);
1032                 compr_img = NULL;
1033         }
1034         return -1;
1035 }
1036
1037 // this function tries to get the .sub file of the given .img
1038 static int opensubfile(const char *isoname) {
1039         char            subname[MAXPATHLEN];
1040
1041         // copy name of the iso and change extension from .img to .sub
1042         strncpy(subname, isoname, sizeof(subname));
1043         subname[MAXPATHLEN - 1] = '\0';
1044         if (strlen(subname) >= 4) {
1045                 strcpy(subname + strlen(subname) - 4, ".sub");
1046         }
1047         else {
1048                 return -1;
1049         }
1050
1051         subHandle = fopen(subname, "rb");
1052         if (subHandle == NULL) {
1053                 return -1;
1054         }
1055
1056         return 0;
1057 }
1058
1059 static int opensbifile(const char *isoname) {
1060         char            sbiname[MAXPATHLEN];
1061         int             s;
1062
1063         strncpy(sbiname, isoname, sizeof(sbiname));
1064         sbiname[MAXPATHLEN - 1] = '\0';
1065         if (strlen(sbiname) >= 4) {
1066                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1067         }
1068         else {
1069                 return -1;
1070         }
1071
1072         fseek(cdHandle, 0, SEEK_END);
1073         s = ftell(cdHandle) / 2352;
1074
1075         return LoadSBI(sbiname, s);
1076 }
1077
1078 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1079 {
1080         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1081         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1082 }
1083
1084 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1085 {
1086         int ret;
1087
1088         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1089         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1090         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1091
1092         if (subChanRaw) DecodeRawSubData();
1093
1094         return ret;
1095 }
1096
1097 static int uncomp2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1098 {
1099         static z_stream z;
1100         int ret = 0;
1101
1102         if (z.zalloc == NULL) {
1103                 // XXX: one-time leak here..
1104                 z.next_in = Z_NULL;
1105                 z.avail_in = 0;
1106                 z.zalloc = Z_NULL;
1107                 z.zfree = Z_NULL;
1108                 z.opaque = Z_NULL;
1109                 ret = inflateInit2(&z, -15);
1110         }
1111         else
1112                 ret = inflateReset(&z);
1113         if (ret != Z_OK)
1114                 return ret;
1115
1116         z.next_in = in;
1117         z.avail_in = in_size;
1118         z.next_out = out;
1119         z.avail_out = *out_size;
1120
1121         ret = inflate(&z, Z_NO_FLUSH);
1122         //inflateEnd(&z);
1123
1124         *out_size -= z.avail_out;
1125         return ret == 1 ? 0 : ret;
1126 }
1127
1128 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1129 {
1130         unsigned long cdbuffer_size, cdbuffer_size_expect;
1131         unsigned int size;
1132         int is_compressed;
1133         off_t start_byte;
1134         int ret, block;
1135
1136         if (base)
1137                 sector += base / 2352;
1138
1139         block = sector >> compr_img->block_shift;
1140         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1141
1142         if (block == compr_img->current_block) {
1143                 //printf("hit sect %d\n", sector);
1144                 goto finish;
1145         }
1146
1147         if (sector >= compr_img->index_len * 16) {
1148                 SysPrintf("sector %d is past img end\n", sector);
1149                 return -1;
1150         }
1151
1152         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1153         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1154                 SysPrintf("seek error for block %d at %llx: ",
1155                         block, (long long)start_byte);
1156                 perror(NULL);
1157                 return -1;
1158         }
1159
1160         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1161         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1162         if (size > sizeof(compr_img->buff_compressed)) {
1163                 SysPrintf("block %d is too large: %u\n", block, size);
1164                 return -1;
1165         }
1166
1167         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1168                                 1, size, cdHandle) != size) {
1169                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1170                 perror(NULL);
1171                 return -1;
1172         }
1173
1174         if (is_compressed) {
1175                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1176                 cdbuffer_size = cdbuffer_size_expect;
1177                 ret = uncomp2(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1178                 if (ret != 0) {
1179                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1180                                         ret, block, sector);
1181                         return -1;
1182                 }
1183                 if (cdbuffer_size != cdbuffer_size_expect)
1184                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1185                                         cdbuffer_size_expect, sector);
1186         }
1187
1188         // done at last!
1189         compr_img->current_block = block;
1190
1191 finish:
1192         if (dest != cdbuffer) // copy avoid HACK
1193                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1194                         CD_FRAMESIZE_RAW);
1195         return CD_FRAMESIZE_RAW;
1196 }
1197
1198 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1199 {
1200         int ret;
1201
1202         fseek(f, base + sector * 2048, SEEK_SET);
1203         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1204
1205         // not really necessary, fake mode 2 header
1206         memset(cdbuffer, 0, 12 * 2);
1207         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1208         cdbuffer[12 + 3] = 1;
1209
1210         return ret;
1211 }
1212
1213 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1214         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1215 }
1216
1217 static unsigned char * CALLBACK ISOgetBuffer(void) {
1218         return cdbuffer + 12;
1219 }
1220
1221 static void PrintTracks(void) {
1222         int i;
1223
1224         for (i = 1; i <= numtracks; i++) {
1225                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1226                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1227                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1228                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1229         }
1230 }
1231
1232 // This function is invoked by the front-end when opening an ISO
1233 // file for playback
1234 static long CALLBACK ISOopen(void) {
1235         boolean isMode1ISO = FALSE;
1236         char alt_bin_filename[MAXPATHLEN];
1237         const char *bin_filename;
1238
1239         if (cdHandle != NULL) {
1240                 return 0; // it's already open
1241         }
1242
1243         cdHandle = fopen(GetIsoFile(), "rb");
1244         if (cdHandle == NULL) {
1245                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1246                         GetIsoFile(), strerror(errno));
1247                 return -1;
1248         }
1249
1250         SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1251
1252         cddaBigEndian = FALSE;
1253         subChanMixed = FALSE;
1254         subChanRaw = FALSE;
1255         pregapOffset = 0;
1256         cdrIsoMultidiskCount = 1;
1257         multifile = 0;
1258
1259         CDR_getBuffer = ISOgetBuffer;
1260         cdimg_read_func = cdread_normal;
1261
1262         if (parsetoc(GetIsoFile()) == 0) {
1263                 SysPrintf("[+toc]");
1264         }
1265         else if (parseccd(GetIsoFile()) == 0) {
1266                 SysPrintf("[+ccd]");
1267         }
1268         else if (parsemds(GetIsoFile()) == 0) {
1269                 SysPrintf("[+mds]");
1270         }
1271         else if (parsecue(GetIsoFile()) == 0) {
1272                 SysPrintf("[+cue]");
1273         }
1274         if (handlepbp(GetIsoFile()) == 0) {
1275                 SysPrintf("[pbp]");
1276                 CDR_getBuffer = ISOgetBuffer_compr;
1277                 cdimg_read_func = cdread_compressed;
1278         }
1279         else if (handlecbin(GetIsoFile()) == 0) {
1280                 SysPrintf("[cbin]");
1281                 CDR_getBuffer = ISOgetBuffer_compr;
1282                 cdimg_read_func = cdread_compressed;
1283         }
1284
1285         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1286                 SysPrintf("[+sub]");
1287         }
1288         if (opensbifile(GetIsoFile()) == 0) {
1289                 SysPrintf("[+sbi]");
1290         }
1291
1292         fseeko(cdHandle, 0, SEEK_END);
1293
1294         // maybe user selected metadata file instead of main .bin ..
1295         bin_filename = GetIsoFile();
1296         if (ftello(cdHandle) < 2352 * 0x10) {
1297                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1298                 FILE *tmpf = NULL;
1299                 size_t i;
1300                 char *p;
1301
1302                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1303                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1304                 if (strlen(alt_bin_filename) >= 4) {
1305                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1306                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1307                                 strcpy(p, exts[i]);
1308                                 tmpf = fopen(alt_bin_filename, "rb");
1309                                 if (tmpf != NULL)
1310                                         break;
1311                         }
1312                 }
1313                 if (tmpf != NULL) {
1314                         bin_filename = alt_bin_filename;
1315                         fclose(cdHandle);
1316                         cdHandle = tmpf;
1317                         fseeko(cdHandle, 0, SEEK_END);
1318                 }
1319         }
1320
1321         // guess whether it is mode1/2048
1322         if (ftello(cdHandle) % 2048 == 0) {
1323                 unsigned int modeTest = 0;
1324                 fseek(cdHandle, 0, SEEK_SET);
1325                 fread(&modeTest, 4, 1, cdHandle);
1326                 if (SWAP32(modeTest) != 0xffffff00) {
1327                         SysPrintf("[2048]");
1328                         isMode1ISO = TRUE;
1329                 }
1330         }
1331         fseek(cdHandle, 0, SEEK_SET);
1332
1333         SysPrintf(".\n");
1334
1335         PrintTracks();
1336
1337         if (subChanMixed)
1338                 cdimg_read_func = cdread_sub_mixed;
1339         else if (isMode1ISO)
1340                 cdimg_read_func = cdread_2048;
1341
1342         // make sure we have another handle open for cdda
1343         if (numtracks > 1 && ti[1].handle == NULL) {
1344                 ti[1].handle = fopen(bin_filename, "rb");
1345         }
1346         cdda_cur_sector = 0;
1347         cdda_file_offset = 0;
1348
1349         return 0;
1350 }
1351
1352 static long CALLBACK ISOclose(void) {
1353         int i;
1354
1355         if (cdHandle != NULL) {
1356                 fclose(cdHandle);
1357                 cdHandle = NULL;
1358         }
1359         if (subHandle != NULL) {
1360                 fclose(subHandle);
1361                 subHandle = NULL;
1362         }
1363         stopCDDA();
1364         cddaHandle = NULL;
1365
1366         if (compr_img != NULL) {
1367                 free(compr_img->index_table);
1368                 free(compr_img);
1369                 compr_img = NULL;
1370         }
1371
1372         for (i = 1; i <= numtracks; i++) {
1373                 if (ti[i].handle != NULL) {
1374                         fclose(ti[i].handle);
1375                         ti[i].handle = NULL;
1376                 }
1377         }
1378         numtracks = 0;
1379         ti[1].type = 0;
1380         UnloadSBI();
1381
1382         memset(cdbuffer, 0, sizeof(cdbuffer));
1383         CDR_getBuffer = ISOgetBuffer;
1384
1385         return 0;
1386 }
1387
1388 static long CALLBACK ISOinit(void) {
1389         assert(cdHandle == NULL);
1390         assert(subHandle == NULL);
1391
1392         return 0; // do nothing
1393 }
1394
1395 static long CALLBACK ISOshutdown(void) {
1396         ISOclose();
1397         return 0;
1398 }
1399
1400 // return Starting and Ending Track
1401 // buffer:
1402 //  byte 0 - start track
1403 //  byte 1 - end track
1404 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1405         buffer[0] = 1;
1406
1407         if (numtracks > 0) {
1408                 buffer[1] = numtracks;
1409         }
1410         else {
1411                 buffer[1] = 1;
1412         }
1413
1414         return 0;
1415 }
1416
1417 // return Track Time
1418 // buffer:
1419 //  byte 0 - frame
1420 //  byte 1 - second
1421 //  byte 2 - minute
1422 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1423         if (track == 0) {
1424                 unsigned int sect;
1425                 unsigned char time[3];
1426                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1427                 sec2msf(sect, (char *)time);
1428                 buffer[2] = time[0];
1429                 buffer[1] = time[1];
1430                 buffer[0] = time[2];
1431         }
1432         else if (numtracks > 0 && track <= numtracks) {
1433                 buffer[2] = ti[track].start[0];
1434                 buffer[1] = ti[track].start[1];
1435                 buffer[0] = ti[track].start[2];
1436         }
1437         else {
1438                 buffer[2] = 0;
1439                 buffer[1] = 2;
1440                 buffer[0] = 0;
1441         }
1442
1443         return 0;
1444 }
1445
1446 // decode 'raw' subchannel data ripped by cdrdao
1447 static void DecodeRawSubData(void) {
1448         unsigned char subQData[12];
1449         int i;
1450
1451         memset(subQData, 0, sizeof(subQData));
1452
1453         for (i = 0; i < 8 * 12; i++) {
1454                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1455                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1456                 }
1457         }
1458
1459         memcpy(&subbuffer[12], subQData, 12);
1460 }
1461
1462 // read track
1463 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1464 // uses bcd format
1465 static long CALLBACK ISOreadTrack(unsigned char *time) {
1466         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1467         long ret;
1468
1469         if (cdHandle == NULL) {
1470                 return -1;
1471         }
1472
1473         if (pregapOffset) {
1474                 subChanMissing = FALSE;
1475                 if (sector >= pregapOffset) {
1476                         sector -= 2 * 75;
1477                         if (sector < pregapOffset)
1478                                 subChanMissing = TRUE;
1479                 }
1480         }
1481
1482         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1483         if (ret < 0)
1484                 return -1;
1485
1486         if (subHandle != NULL) {
1487                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1488                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1489
1490                 if (subChanRaw) DecodeRawSubData();
1491         }
1492
1493         return 0;
1494 }
1495
1496 // plays cdda audio
1497 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1498 // does NOT uses bcd format
1499 static long CALLBACK ISOplay(unsigned char *time) {
1500         unsigned int i;
1501
1502         if (numtracks <= 1)
1503                 return 0;
1504
1505         // find the track
1506         cdda_cur_sector = msf2sec((char *)time);
1507         for (i = numtracks; i > 1; i--) {
1508                 cdda_first_sector = msf2sec(ti[i].start);
1509                 if (cdda_first_sector <= cdda_cur_sector + 2 * 75)
1510                         break;
1511         }
1512         cdda_file_offset = ti[i].start_offset;
1513
1514         // find the file that contains this track
1515         for (; i > 1; i--)
1516                 if (ti[i].handle != NULL)
1517                         break;
1518
1519         cddaHandle = ti[i].handle;
1520
1521         if (SPU_playCDDAchannel != NULL)
1522                 startCDDA();
1523
1524         return 0;
1525 }
1526
1527 // stops cdda audio
1528 static long CALLBACK ISOstop(void) {
1529         stopCDDA();
1530         return 0;
1531 }
1532
1533 // gets subchannel data
1534 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1535         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1536                 return subbuffer;
1537         }
1538
1539         return NULL;
1540 }
1541
1542 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1543         u32 sect;
1544
1545         CDR__getStatus(stat);
1546
1547         if (playing) {
1548                 stat->Type = 0x02;
1549                 stat->Status |= 0x80;
1550         }
1551         else {
1552                 // BIOS - boot ID (CD type)
1553                 stat->Type = ti[1].type;
1554         }
1555
1556         // relative -> absolute time
1557         sect = cddaCurPos;
1558         sec2msf(sect, (char *)stat->Time);
1559
1560         return 0;
1561 }
1562
1563 // read CDDA sector into buffer
1564 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1565         unsigned char msf[3] = {m, s, f};
1566         unsigned int file, track, track_start = 0;
1567         int ret;
1568
1569         cddaCurPos = msf2sec((char *)msf);
1570
1571         // find current track index
1572         for (track = numtracks; ; track--) {
1573                 track_start = msf2sec(ti[track].start);
1574                 if (track_start <= cddaCurPos)
1575                         break;
1576                 if (track == 1)
1577                         break;
1578         }
1579
1580         // data tracks play silent
1581         if (ti[track].type != CDDA) {
1582                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1583                 return 0;
1584         }
1585
1586         file = 1;
1587         if (multifile) {
1588                 // find the file that contains this track
1589                 for (file = track; file > 1; file--)
1590                         if (ti[file].handle != NULL)
1591                                 break;
1592         }
1593
1594         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1595                 buffer, cddaCurPos - track_start);
1596         if (ret != CD_FRAMESIZE_RAW) {
1597                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1598                 return -1;
1599         }
1600
1601         if (cddaBigEndian) {
1602                 int i;
1603                 unsigned char tmp;
1604
1605                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1606                         tmp = buffer[i * 2];
1607                         buffer[i * 2] = buffer[i * 2 + 1];
1608                         buffer[i * 2 + 1] = tmp;
1609                 }
1610         }
1611
1612         return 0;
1613 }
1614
1615 void cdrIsoInit(void) {
1616         CDR_init = ISOinit;
1617         CDR_shutdown = ISOshutdown;
1618         CDR_open = ISOopen;
1619         CDR_close = ISOclose;
1620         CDR_getTN = ISOgetTN;
1621         CDR_getTD = ISOgetTD;
1622         CDR_readTrack = ISOreadTrack;
1623         CDR_getBuffer = ISOgetBuffer;
1624         CDR_play = ISOplay;
1625         CDR_stop = ISOstop;
1626         CDR_getBufferSub = ISOgetBufferSub;
1627         CDR_getStatus = ISOgetStatus;
1628         CDR_readCDDA = ISOreadCDDA;
1629
1630         CDR_getDriveLetter = CDR__getDriveLetter;
1631         CDR_configure = CDR__configure;
1632         CDR_test = CDR__test;
1633         CDR_about = CDR__about;
1634         CDR_setfilename = CDR__setfilename;
1635
1636         numtracks = 0;
1637 }
1638
1639 int cdrIsoActive(void) {
1640         return (cdHandle != NULL);
1641 }