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 #define WIN32_LEAN_AND_MEAN
  30 #include <process.h>
  31 #include <windows.h>
  32 #define strcasecmp _stricmp
  33 #define usleep(x) (Sleep((x) / 1000))
  34 #else
  35 #include <pthread.h>
  36 #include <sys/time.h>
  37 #include <unistd.h>
  38 #endif
  39 #include <errno.h>
  40 #include <zlib.h>
  41
  42 unsigned int cdrIsoMultidiskCount;
  43 unsigned int cdrIsoMultidiskSelect;
  44
  45 static FILE *cdHandle = NULL;
  46 static FILE *cddaHandle = NULL;
  47 static FILE *subHandle = NULL;
  48
  49 static boolean subChanMixed = FALSE;
  50 static boolean subChanRaw = FALSE;
  51 static boolean subChanMissing = FALSE;
  52
  53 static boolean multifile = FALSE;
  54
  55 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
  56 static unsigned char subbuffer[SUB_FRAMESIZE];
  57
  58 static unsigned char sndbuffer[CD_FRAMESIZE_RAW * 10];
  59
  60 #define CDDA_FRAMETIME                  (1000 * (sizeof(sndbuffer) / CD_FRAMESIZE_RAW) / 75)
  61
  62 #ifdef _WIN32
  63 static HANDLE threadid;
  64 #else
  65 static pthread_t threadid;
  66 #endif
  67 static unsigned int initial_offset = 0;
  68 static boolean playing = FALSE;
  69 static boolean cddaBigEndian = FALSE;
  70 // cdda sectors in toc, byte offset in file
  71 static unsigned int cdda_cur_sector;
  72 static unsigned int cdda_first_sector;
  73 static unsigned int cdda_file_offset;
  74 /* Frame offset into CD image where pregap data would be found if it was there.
  75  * If a game seeks there we must *not* return subchannel data since it's
  76  * not in the CD image, so that cdrom code can fake subchannel data instead.
  77  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  78 static unsigned int pregapOffset;
  79
  80 #define cddaCurPos cdda_cur_sector
  81
  82 // compressed image stuff
  83 static struct {
  84         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  85         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  86         unsigned int *index_table;
  87         unsigned int index_len;
  88         unsigned int block_shift;
  89         unsigned int current_block;
  90         unsigned int sector_in_blk;
  91 } *compr_img;
  92
  93 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
  94
  95 char* CALLBACK CDR__getDriveLetter(void);
  96 long CALLBACK CDR__configure(void);
  97 long CALLBACK CDR__test(void);
  98 void CALLBACK CDR__about(void);
  99 long CALLBACK CDR__setfilename(char *filename);
 100 long CALLBACK CDR__getStatus(struct CdrStat *stat);
 101
 102 static void DecodeRawSubData(void);
 103
 104 struct trackinfo {
 105         enum {DATA=1, CDDA} type;
 106         char start[3];          // MSF-format
 107         char length[3];         // MSF-format
 108         FILE *handle;           // for multi-track images CDDA
 109         unsigned int start_offset; // byte offset from start of above file
 110 };
 111
 112 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 113
 114 static int numtracks = 0;
 115 static struct trackinfo ti[MAXTRACKS];
 116
 117 // get a sector from a msf-array
 118 static unsigned int msf2sec(char *msf) {
 119         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 120 }
 121
 122 static void sec2msf(unsigned int s, char *msf) {
 123         msf[0] = s / 75 / 60;
 124         s = s - msf[0] * 75 * 60;
 125         msf[1] = s / 75;
 126         s = s - msf[1] * 75;
 127         msf[2] = s;
 128 }
 129
 130 // divide a string of xx:yy:zz into m, s, f
 131 static void tok2msf(char *time, char *msf) {
 132         char *token;
 133
 134         token = strtok(time, ":");
 135         if (token) {
 136                 msf[0] = atoi(token);
 137         }
 138         else {
 139                 msf[0] = 0;
 140         }
 141
 142         token = strtok(NULL, ":");
 143         if (token) {
 144                 msf[1] = atoi(token);
 145         }
 146         else {
 147                 msf[1] = 0;
 148         }
 149
 150         token = strtok(NULL, ":");
 151         if (token) {
 152                 msf[2] = atoi(token);
 153         }
 154         else {
 155                 msf[2] = 0;
 156         }
 157 }
 158
 159 #ifndef _WIN32
 160 static long GetTickCount(void) {
 161         static time_t           initial_time = 0;
 162         struct timeval          now;
 163
 164         gettimeofday(&now, NULL);
 165
 166         if (initial_time == 0) {
 167                 initial_time = now.tv_sec;
 168         }
 169
 170         return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
 171 }
 172 #endif
 173
 174 // this thread plays audio data
 175 #ifdef _WIN32
 176 static void playthread(void *param)
 177 #else
 178 static void *playthread(void *param)
 179 #endif
 180 {
 181         long osleep, d, t, i, s;
 182         unsigned char   tmp;
 183         int ret = 0, sector_offs;
 184
 185         t = GetTickCount();
 186
 187         while (playing) {
 188                 s = 0;
 189                 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
 190                         sector_offs = cdda_cur_sector - cdda_first_sector;
 191                         if (sector_offs < 0) {
 192                                 d = CD_FRAMESIZE_RAW;
 193                                 memset(sndbuffer + s, 0, d);
 194                         }
 195                         else {
 196                                 d = cdimg_read_func(cddaHandle, cdda_file_offset,
 197                                         sndbuffer + s, sector_offs);
 198                                 if (d < CD_FRAMESIZE_RAW)
 199                                         break;
 200                         }
 201
 202                         s += d;
 203                         cdda_cur_sector++;
 204                 }
 205
 206                 if (s == 0) {
 207                         playing = FALSE;
 208                         initial_offset = 0;
 209                         break;
 210                 }
 211
 212                 if (!cdr.Muted && playing) {
 213                         if (cddaBigEndian) {
 214                                 for (i = 0; i < s / 2; i++) {
 215                                         tmp = sndbuffer[i * 2];
 216                                         sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
 217                                         sndbuffer[i * 2 + 1] = tmp;
 218                                 }
 219                         }
 220
 221                         // can't do it yet due to readahead..
 222                         //cdrAttenuate((short *)sndbuffer, s / 4, 1);
 223                         do {
 224                                 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
 225                                 if (ret == 0x7761)
 226             {
 227                                         usleep(6 * 1000);
 228             }
 229                         } while (ret == 0x7761 && playing); // rearmed_wait
 230                 }
 231
 232                 if (ret != 0x676f) { // !rearmed_go
 233                         // do approx sleep
 234                         long now;
 235
 236                         // HACK: stop feeding data while emu is paused
 237                         extern int stop;
 238                         while (stop && playing)
 239          {
 240                                 usleep(10000);
 241          }
 242
 243                         now = GetTickCount();
 244                         osleep = t - now;
 245                         if (osleep <= 0) {
 246                                 osleep = 1;
 247                                 t = now;
 248                         }
 249                         else if (osleep > CDDA_FRAMETIME) {
 250                                 osleep = CDDA_FRAMETIME;
 251                                 t = now;
 252                         }
 253
 254                         usleep(osleep * 1000);
 255                         t += CDDA_FRAMETIME;
 256                 }
 257
 258         }
 259
 260 #ifdef _WIN32
 261         _endthread();
 262 #else
 263         pthread_exit(0);
 264         return NULL;
 265 #endif
 266 }
 267
 268 // stop the CDDA playback
 269 static void stopCDDA() {
 270         if (!playing) {
 271                 return;
 272         }
 273
 274         playing = FALSE;
 275 #ifdef _WIN32
 276         WaitForSingleObject(threadid, INFINITE);
 277 #else
 278         pthread_join(threadid, NULL);
 279 #endif
 280 }
 281
 282 // start the CDDA playback
 283 static void startCDDA(void) {
 284         if (playing) {
 285                 stopCDDA();
 286         }
 287
 288         playing = TRUE;
 289
 290 #ifdef _WIN32
 291         threadid = (HANDLE)_beginthread(playthread, 0, NULL);
 292 #else
 293         pthread_create(&threadid, NULL, playthread, NULL);
 294 #endif
 295 }
 296
 297 // this function tries to get the .toc file of the given .bin
 298 // the necessary data is put into the ti (trackinformation)-array
 299 static int parsetoc(const char *isofile) {
 300         char                    tocname[MAXPATHLEN];
 301         FILE                    *fi;
 302         char                    linebuf[256], tmp[256], name[256];
 303         char                    *token;
 304         char                    time[20], time2[20];
 305         unsigned int    t, sector_offs, sector_size;
 306         unsigned int    current_zero_gap = 0;
 307
 308         numtracks = 0;
 309
 310         // copy name of the iso and change extension from .bin to .toc
 311         strncpy(tocname, isofile, sizeof(tocname));
 312         tocname[MAXPATHLEN - 1] = '\0';
 313         if (strlen(tocname) >= 4) {
 314                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 315         }
 316         else {
 317                 return -1;
 318         }
 319
 320         if ((fi = fopen(tocname, "r")) == NULL) {
 321                 // try changing extension to .cue (to satisfy some stupid tutorials)
 322                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 323                 if ((fi = fopen(tocname, "r")) == NULL) {
 324                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 325                         strcpy(tocname, isofile);
 326                         t = strlen(tocname);
 327                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 328                                 tocname[t - 4] = '\0';
 329                                 if ((fi = fopen(tocname, "r")) == NULL) {
 330                                         return -1;
 331                                 }
 332                         }
 333                         else {
 334                                 return -1;
 335                         }
 336                 }
 337                 // check if it's really a TOC named as a .cue
 338                 fgets(linebuf, sizeof(linebuf), fi);
 339                 token = strtok(linebuf, " ");
 340                 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 341                         fclose(fi);
 342                         return -1;
 343                 }
 344                 fseek(fi, 0, SEEK_SET);
 345         }
 346
 347         memset(&ti, 0, sizeof(ti));
 348         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 349
 350         sector_size = CD_FRAMESIZE_RAW;
 351         sector_offs = 2 * 75;
 352
 353         // parse the .toc file
 354         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 355                 // search for tracks
 356                 strncpy(tmp, linebuf, sizeof(linebuf));
 357                 token = strtok(tmp, " ");
 358
 359                 if (token == NULL) continue;
 360
 361                 if (!strcmp(token, "TRACK")) {
 362                         sector_offs += current_zero_gap;
 363                         current_zero_gap = 0;
 364
 365                         // get type of track
 366                         token = strtok(NULL, " ");
 367                         numtracks++;
 368
 369                         if (!strncmp(token, "MODE2_RAW", 9)) {
 370                                 ti[numtracks].type = DATA;
 371                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 372
 373                                 // check if this image contains mixed subchannel data
 374                                 token = strtok(NULL, " ");
 375                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 376                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 377                                         subChanMixed = TRUE;
 378                                         if (!strncmp(token, "RW_RAW", 6))
 379                                                 subChanRaw = TRUE;
 380                                 }
 381                         }
 382                         else if (!strncmp(token, "AUDIO", 5)) {
 383                                 ti[numtracks].type = CDDA;
 384                         }
 385                 }
 386                 else if (!strcmp(token, "DATAFILE")) {
 387                         if (ti[numtracks].type == CDDA) {
 388                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 389                                 ti[numtracks].start_offset = t;
 390                                 t = t / sector_size + sector_offs;
 391                                 sec2msf(t, (char *)&ti[numtracks].start);
 392                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 393                         }
 394                         else {
 395                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 396                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 397                         }
 398                 }
 399                 else if (!strcmp(token, "FILE")) {
 400                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 401                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 402                         t += msf2sec(ti[numtracks].start) * sector_size;
 403                         ti[numtracks].start_offset = t;
 404                         t = t / sector_size + sector_offs;
 405                         sec2msf(t, (char *)&ti[numtracks].start);
 406                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 407                 }
 408                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 409                         // skip unneeded optional fields
 410                         while (token != NULL) {
 411                                 token = strtok(NULL, " ");
 412                                 if (strchr(token, ':') != NULL)
 413                                         break;
 414                         }
 415                         if (token != NULL) {
 416                                 tok2msf(token, tmp);
 417                                 current_zero_gap = msf2sec(tmp);
 418                         }
 419                         if (numtracks > 1) {
 420                                 t = ti[numtracks - 1].start_offset;
 421                                 t /= sector_size;
 422                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 423                         }
 424                 }
 425                 else if (!strcmp(token, "START")) {
 426                         token = strtok(NULL, " ");
 427                         if (token != NULL && strchr(token, ':')) {
 428                                 tok2msf(token, tmp);
 429                                 t = msf2sec(tmp);
 430                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 431                                 t = msf2sec(ti[numtracks].start) + t;
 432                                 sec2msf(t, (char *)&ti[numtracks].start);
 433                         }
 434                 }
 435         }
 436
 437         fclose(fi);
 438
 439         return 0;
 440 }
 441
 442 // this function tries to get the .cue file of the given .bin
 443 // the necessary data is put into the ti (trackinformation)-array
 444 static int parsecue(const char *isofile) {
 445         char                    cuename[MAXPATHLEN];
 446         char                    filepath[MAXPATHLEN];
 447         char                    *incue_fname;
 448         FILE                    *fi;
 449         char                    *token;
 450         char                    time[20];
 451         char                    *tmp;
 452         char                    linebuf[256], tmpb[256], dummy[256];
 453         unsigned int    incue_max_len;
 454         unsigned int    t, file_len, mode, sector_offs;
 455         unsigned int    sector_size = 2352;
 456
 457         numtracks = 0;
 458
 459         // copy name of the iso and change extension from .bin to .cue
 460         strncpy(cuename, isofile, sizeof(cuename));
 461         cuename[MAXPATHLEN - 1] = '\0';
 462         if (strlen(cuename) >= 4) {
 463                 strcpy(cuename + strlen(cuename) - 4, ".cue");
 464         }
 465         else {
 466                 return -1;
 467         }
 468
 469         if ((fi = fopen(cuename, "r")) == NULL) {
 470                 return -1;
 471         }
 472
 473         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 474         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 475         // that...
 476         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 477                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 478                         // Don't proceed further, as this is actually a .toc file rather
 479                         // than a .cue file.
 480                         fclose(fi);
 481                         return parsetoc(isofile);
 482                 }
 483                 fseek(fi, 0, SEEK_SET);
 484         }
 485
 486         // build a path for files referenced in .cue
 487         strncpy(filepath, cuename, sizeof(filepath));
 488         tmp = strrchr(filepath, '/');
 489         if (tmp == NULL)
 490                 tmp = strrchr(filepath, '\\');
 491         if (tmp != NULL)
 492                 tmp++;
 493         else
 494                 tmp = filepath;
 495         *tmp = 0;
 496         filepath[sizeof(filepath) - 1] = 0;
 497         incue_fname = tmp;
 498         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 499
 500         memset(&ti, 0, sizeof(ti));
 501
 502         file_len = 0;
 503         sector_offs = 2 * 75;
 504
 505         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 506                 strncpy(dummy, linebuf, sizeof(linebuf));
 507                 token = strtok(dummy, " ");
 508
 509                 if (token == NULL) {
 510                         continue;
 511                 }
 512
 513                 if (!strcmp(token, "TRACK")) {
 514                         numtracks++;
 515
 516                         sector_size = 0;
 517                         if (strstr(linebuf, "AUDIO") != NULL) {
 518                                 ti[numtracks].type = CDDA;
 519                                 sector_size = 2352;
 520                         }
 521                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 522                                 ti[numtracks].type = DATA;
 523                         else {
 524                                 SysPrintf(".cue: failed to parse TRACK\n");
 525                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 526                         }
 527                         if (sector_size == 0)
 528                                 sector_size = 2352;
 529                 }
 530                 else if (!strcmp(token, "INDEX")) {
 531                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 532                                 SysPrintf(".cue: failed to parse INDEX\n");
 533                         tok2msf(time, (char *)&ti[numtracks].start);
 534
 535                         t = msf2sec(ti[numtracks].start);
 536                         ti[numtracks].start_offset = t * sector_size;
 537                         t += sector_offs;
 538                         sec2msf(t, ti[numtracks].start);
 539
 540                         // default track length to file length
 541                         t = file_len - ti[numtracks].start_offset / sector_size;
 542                         sec2msf(t, ti[numtracks].length);
 543
 544                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 545                                 // this track uses the same file as the last,
 546                                 // start of this track is last track's end
 547                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 548                                 sec2msf(t, ti[numtracks - 1].length);
 549                         }
 550                         if (numtracks > 1 && pregapOffset == -1)
 551                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 552                 }
 553                 else if (!strcmp(token, "PREGAP")) {
 554                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 555                                 tok2msf(time, dummy);
 556                                 sector_offs += msf2sec(dummy);
 557                         }
 558                         pregapOffset = -1; // mark to fill track start_offset
 559                 }
 560                 else if (!strcmp(token, "FILE")) {
 561                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 562                         if (t != 1)
 563                                 sscanf(linebuf, " FILE %255s", tmpb);
 564
 565                         // absolute path?
 566                         ti[numtracks + 1].handle = fopen(tmpb, "rb");
 567                         if (ti[numtracks + 1].handle == NULL) {
 568                                 // relative to .cue?
 569                                 tmp = strrchr(tmpb, '\\');
 570                                 if (tmp == NULL)
 571                                         tmp = strrchr(tmpb, '/');
 572                                 if (tmp != NULL)
 573                                         tmp++;
 574                                 else
 575                                         tmp = tmpb;
 576                                 strncpy(incue_fname, tmp, incue_max_len);
 577                                 ti[numtracks + 1].handle = fopen(filepath, "rb");
 578                         }
 579
 580                         // update global offset if this is not first file in this .cue
 581                         if (numtracks + 1 > 1) {
 582                                 multifile = 1;
 583                                 sector_offs += file_len;
 584                         }
 585
 586                         file_len = 0;
 587                         if (ti[numtracks + 1].handle == NULL) {
 588                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 589                                 continue;
 590                         }
 591                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 592                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 593
 594                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 595                                 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
 596                         {
 597                                 // user selected .cue as image file, use it's data track instead
 598                                 fclose(cdHandle);
 599                                 cdHandle = fopen(filepath, "rb");
 600                         }
 601                 }
 602         }
 603
 604         fclose(fi);
 605
 606         return 0;
 607 }
 608
 609 // this function tries to get the .ccd file of the given .img
 610 // the necessary data is put into the ti (trackinformation)-array
 611 static int parseccd(const char *isofile) {
 612         char                    ccdname[MAXPATHLEN];
 613         FILE                    *fi;
 614         char                    linebuf[256];
 615         unsigned int    t;
 616
 617         numtracks = 0;
 618
 619         // copy name of the iso and change extension from .img to .ccd
 620         strncpy(ccdname, isofile, sizeof(ccdname));
 621         ccdname[MAXPATHLEN - 1] = '\0';
 622         if (strlen(ccdname) >= 4) {
 623                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 624         }
 625         else {
 626                 return -1;
 627         }
 628
 629         if ((fi = fopen(ccdname, "r")) == NULL) {
 630                 return -1;
 631         }
 632
 633         memset(&ti, 0, sizeof(ti));
 634
 635         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 636                 if (!strncmp(linebuf, "[TRACK", 6)){
 637                         numtracks++;
 638                 }
 639                 else if (!strncmp(linebuf, "MODE=", 5)) {
 640                         sscanf(linebuf, "MODE=%d", &t);
 641                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 642                 }
 643                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 644                         sscanf(linebuf, "INDEX 1=%d", &t);
 645                         sec2msf(t + 2 * 75, ti[numtracks].start);
 646                         ti[numtracks].start_offset = t * 2352;
 647
 648                         // If we've already seen another track, this is its end
 649                         if (numtracks > 1) {
 650                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 651                                 sec2msf(t, ti[numtracks - 1].length);
 652                         }
 653                 }
 654         }
 655
 656         fclose(fi);
 657
 658         // Fill out the last track's end based on size
 659         if (numtracks >= 1) {
 660                 fseek(cdHandle, 0, SEEK_END);
 661                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 662                 sec2msf(t, ti[numtracks].length);
 663         }
 664
 665         return 0;
 666 }
 667
 668 // this function tries to get the .mds file of the given .mdf
 669 // the necessary data is put into the ti (trackinformation)-array
 670 static int parsemds(const char *isofile) {
 671         char                    mdsname[MAXPATHLEN];
 672         FILE                    *fi;
 673         unsigned int    offset, extra_offset, l, i;
 674         unsigned short  s;
 675
 676         numtracks = 0;
 677
 678         // copy name of the iso and change extension from .mdf to .mds
 679         strncpy(mdsname, isofile, sizeof(mdsname));
 680         mdsname[MAXPATHLEN - 1] = '\0';
 681         if (strlen(mdsname) >= 4) {
 682                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 683         }
 684         else {
 685                 return -1;
 686         }
 687
 688         if ((fi = fopen(mdsname, "rb")) == NULL) {
 689                 return -1;
 690         }
 691
 692         memset(&ti, 0, sizeof(ti));
 693
 694         // check if it's a valid mds file
 695         fread(&i, 1, sizeof(unsigned int), fi);
 696         i = SWAP32(i);
 697         if (i != 0x4944454D) {
 698                 // not an valid mds file
 699                 fclose(fi);
 700                 return -1;
 701         }
 702
 703         // get offset to session block
 704         fseek(fi, 0x50, SEEK_SET);
 705         fread(&offset, 1, sizeof(unsigned int), fi);
 706         offset = SWAP32(offset);
 707
 708         // get total number of tracks
 709         offset += 14;
 710         fseek(fi, offset, SEEK_SET);
 711         fread(&s, 1, sizeof(unsigned short), fi);
 712         s = SWAP16(s);
 713         numtracks = s;
 714
 715         // get offset to track blocks
 716         fseek(fi, 4, SEEK_CUR);
 717         fread(&offset, 1, sizeof(unsigned int), fi);
 718         offset = SWAP32(offset);
 719
 720         // skip lead-in data
 721         while (1) {
 722                 fseek(fi, offset + 4, SEEK_SET);
 723                 if (fgetc(fi) < 0xA0) {
 724                         break;
 725                 }
 726                 offset += 0x50;
 727         }
 728
 729         // check if the image contains mixed subchannel data
 730         fseek(fi, offset + 1, SEEK_SET);
 731         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 732
 733         // read track data
 734         for (i = 1; i <= numtracks; i++) {
 735                 fseek(fi, offset, SEEK_SET);
 736
 737                 // get the track type
 738                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 739                 fseek(fi, 8, SEEK_CUR);
 740
 741                 // get the track starting point
 742                 ti[i].start[0] = fgetc(fi);
 743                 ti[i].start[1] = fgetc(fi);
 744                 ti[i].start[2] = fgetc(fi);
 745
 746                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 747                 extra_offset = SWAP32(extra_offset);
 748
 749                 // get track start offset (in .mdf)
 750                 fseek(fi, offset + 0x28, SEEK_SET);
 751                 fread(&l, 1, sizeof(unsigned int), fi);
 752                 l = SWAP32(l);
 753                 ti[i].start_offset = l;
 754
 755                 // get pregap
 756                 fseek(fi, extra_offset, SEEK_SET);
 757                 fread(&l, 1, sizeof(unsigned int), fi);
 758                 l = SWAP32(l);
 759                 if (l != 0 && i > 1)
 760                         pregapOffset = msf2sec(ti[i].start);
 761
 762                 // get the track length
 763                 fread(&l, 1, sizeof(unsigned int), fi);
 764                 l = SWAP32(l);
 765                 sec2msf(l, ti[i].length);
 766
 767                 offset += 0x50;
 768         }
 769
 770         fclose(fi);
 771         return 0;
 772 }
 773
 774 static int handlepbp(const char *isofile) {
 775         struct {
 776                 unsigned int sig;
 777                 unsigned int dontcare[8];
 778                 unsigned int psar_offs;
 779         } pbp_hdr;
 780         struct {
 781                 unsigned char type;
 782                 unsigned char pad0;
 783                 unsigned char track;
 784                 char index0[3];
 785                 char pad1;
 786                 char index1[3];
 787         } toc_entry;
 788         struct {
 789                 unsigned int offset;
 790                 unsigned int size;
 791                 unsigned int dontcare[6];
 792         } index_entry;
 793         char psar_sig[11];
 794         unsigned int t, cd_length, cdimg_base;
 795         unsigned int offsettab[8], psisoimg_offs;
 796         const char *ext = NULL;
 797         int i, ret;
 798
 799         if (strlen(isofile) >= 4)
 800                 ext = isofile + strlen(isofile) - 4;
 801         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 802                 return -1;
 803
 804         fseek(cdHandle, 0, SEEK_SET);
 805
 806         numtracks = 0;
 807
 808         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 809         if (ret != sizeof(pbp_hdr)) {
 810                 SysPrintf("failed to read pbp\n");
 811                 goto fail_io;
 812         }
 813
 814         ret = fseek(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 815         if (ret != 0) {
 816                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 817                 goto fail_io;
 818         }
 819
 820         psisoimg_offs = pbp_hdr.psar_offs;
 821         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 822         psar_sig[10] = 0;
 823         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 824                 // multidisk image?
 825                 ret = fseek(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 826                 if (ret != 0) {
 827                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 828                         goto fail_io;
 829                 }
 830
 831                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 832                         SysPrintf("failed to read offsettab\n");
 833                         goto fail_io;
 834                 }
 835
 836                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 837                         if (offsettab[i] == 0)
 838                                 break;
 839                 }
 840                 cdrIsoMultidiskCount = i;
 841                 if (cdrIsoMultidiskCount == 0) {
 842                         SysPrintf("multidisk eboot has 0 images?\n");
 843                         goto fail_io;
 844                 }
 845
 846                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 847                         cdrIsoMultidiskSelect = 0;
 848
 849                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 850
 851                 ret = fseek(cdHandle, psisoimg_offs, SEEK_SET);
 852                 if (ret != 0) {
 853                         SysPrintf("failed to seek to %x\n", psisoimg_offs);
 854                         goto fail_io;
 855                 }
 856
 857                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 858                 psar_sig[10] = 0;
 859         }
 860
 861         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 862                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 863                 goto fail_io;
 864         }
 865
 866         // seek to TOC
 867         ret = fseek(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 868         if (ret != 0) {
 869                 SysPrintf("failed to seek to %x\n", psisoimg_offs + 0x800);
 870                 goto fail_io;
 871         }
 872
 873         // first 3 entries are special
 874         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 875         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 876         numtracks = btoi(toc_entry.index1[0]);
 877
 878         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 879         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 880                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 881
 882         for (i = 1; i <= numtracks; i++) {
 883                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 884
 885                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 886
 887                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 888                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 889                 ti[i].start_offset *= 2352;
 890                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 891                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 892                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 893
 894                 if (i > 1) {
 895                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 896                         sec2msf(t, ti[i - 1].length);
 897                 }
 898         }
 899         t = cd_length - ti[numtracks].start_offset / 2352;
 900         sec2msf(t, ti[numtracks].length);
 901
 902         // seek to ISO index
 903         ret = fseek(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 904         if (ret != 0) {
 905                 SysPrintf("failed to seek to ISO index\n");
 906                 goto fail_io;
 907         }
 908
 909         compr_img = calloc(1, sizeof(*compr_img));
 910         if (compr_img == NULL)
 911                 goto fail_io;
 912
 913         compr_img->block_shift = 4;
 914         compr_img->current_block = (unsigned int)-1;
 915
 916         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 917         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 918         if (compr_img->index_table == NULL)
 919                 goto fail_io;
 920
 921         cdimg_base = psisoimg_offs + 0x100000;
 922         for (i = 0; i < compr_img->index_len; i++) {
 923                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 924                 if (ret != sizeof(index_entry)) {
 925                         SysPrintf("failed to read index_entry #%d\n", i);
 926                         goto fail_index;
 927                 }
 928
 929                 if (index_entry.size == 0)
 930                         break;
 931
 932                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 933         }
 934         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 935
 936         return 0;
 937
 938 fail_index:
 939         free(compr_img->index_table);
 940         compr_img->index_table = NULL;
 941 fail_io:
 942         if (compr_img != NULL) {
 943                 free(compr_img);
 944                 compr_img = NULL;
 945         }
 946         return -1;
 947 }
 948
 949 static int handlecbin(const char *isofile) {
 950         struct
 951         {
 952                 char magic[4];
 953                 unsigned int header_size;
 954                 unsigned long long total_bytes;
 955                 unsigned int block_size;
 956                 unsigned char ver;              // 1
 957                 unsigned char align;
 958                 unsigned char rsv_06[2];
 959         } ciso_hdr;
 960         const char *ext = NULL;
 961         unsigned int index = 0, plain;
 962         int i, ret;
 963
 964         if (strlen(isofile) >= 5)
 965                 ext = isofile + strlen(isofile) - 5;
 966         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 967                 return -1;
 968
 969         fseek(cdHandle, 0, SEEK_SET);
 970
 971         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 972         if (ret != sizeof(ciso_hdr)) {
 973                 SysPrintf("failed to read ciso header\n");
 974                 return -1;
 975         }
 976
 977         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 978                 SysPrintf("bad ciso header\n");
 979                 return -1;
 980         }
 981         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 982                 ret = fseek(cdHandle, ciso_hdr.header_size, SEEK_SET);
 983                 if (ret != 0) {
 984                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 985                         return -1;
 986                 }
 987         }
 988
 989         compr_img = calloc(1, sizeof(*compr_img));
 990         if (compr_img == NULL)
 991                 goto fail_io;
 992
 993         compr_img->block_shift = 0;
 994         compr_img->current_block = (unsigned int)-1;
 995
 996         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
 997         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 998         if (compr_img->index_table == NULL)
 999                 goto fail_io;
1000
1001         ret = fread(compr_img->index_table, sizeof(compr_img->index_table[0]), compr_img->index_len, cdHandle);
1002         if (ret != compr_img->index_len) {
1003                 SysPrintf("failed to read index table\n");
1004                 goto fail_index;
1005         }
1006
1007         for (i = 0; i < compr_img->index_len + 1; i++) {
1008                 index = compr_img->index_table[i];
1009                 plain = index & 0x80000000;
1010                 index &= 0x7fffffff;
1011                 compr_img->index_table[i] = (index << ciso_hdr.align) | plain;
1012         }
1013         if ((long long)index << ciso_hdr.align >= 0x80000000ll)
1014                 SysPrintf("warning: ciso img too large, expect problems\n");
1015
1016         return 0;
1017
1018 fail_index:
1019         free(compr_img->index_table);
1020         compr_img->index_table = NULL;
1021 fail_io:
1022         if (compr_img != NULL) {
1023                 free(compr_img);
1024                 compr_img = NULL;
1025         }
1026         return -1;
1027 }
1028
1029 // this function tries to get the .sub file of the given .img
1030 static int opensubfile(const char *isoname) {
1031         char            subname[MAXPATHLEN];
1032
1033         // copy name of the iso and change extension from .img to .sub
1034         strncpy(subname, isoname, sizeof(subname));
1035         subname[MAXPATHLEN - 1] = '\0';
1036         if (strlen(subname) >= 4) {
1037                 strcpy(subname + strlen(subname) - 4, ".sub");
1038         }
1039         else {
1040                 return -1;
1041         }
1042
1043         subHandle = fopen(subname, "rb");
1044         if (subHandle == NULL) {
1045                 return -1;
1046         }
1047
1048         return 0;
1049 }
1050
1051 static int opensbifile(const char *isoname) {
1052         char            sbiname[MAXPATHLEN];
1053         int             s;
1054
1055         strncpy(sbiname, isoname, sizeof(sbiname));
1056         sbiname[MAXPATHLEN - 1] = '\0';
1057         if (strlen(sbiname) >= 4) {
1058                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1059         }
1060         else {
1061                 return -1;
1062         }
1063
1064         fseek(cdHandle, 0, SEEK_END);
1065         s = ftell(cdHandle) / 2352;
1066
1067         return LoadSBI(sbiname, s);
1068 }
1069
1070 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1071 {
1072         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1073         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1074 }
1075
1076 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1077 {
1078         int ret;
1079
1080         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1081         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1082         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1083
1084         if (subChanRaw) DecodeRawSubData();
1085
1086         return ret;
1087 }
1088
1089 static int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1090 {
1091         static z_stream z;
1092         int ret = 0;
1093
1094         if (z.zalloc == NULL) {
1095                 // XXX: one-time leak here..
1096                 z.next_in = Z_NULL;
1097                 z.avail_in = 0;
1098                 z.zalloc = Z_NULL;
1099                 z.zfree = Z_NULL;
1100                 z.opaque = Z_NULL;
1101                 ret = inflateInit2(&z, -15);
1102         }
1103         else
1104                 ret = inflateReset(&z);
1105         if (ret != Z_OK)
1106                 return ret;
1107
1108         z.next_in = in;
1109         z.avail_in = in_size;
1110         z.next_out = out;
1111         z.avail_out = *out_size;
1112
1113         ret = inflate(&z, Z_NO_FLUSH);
1114         //inflateEnd(&z);
1115
1116         *out_size -= z.avail_out;
1117         return ret == 1 ? 0 : ret;
1118 }
1119
1120 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1121 {
1122         unsigned long cdbuffer_size, cdbuffer_size_expect;
1123         unsigned int start_byte, size;
1124         int is_compressed;
1125         int ret, block;
1126
1127         if (base)
1128                 sector += base / 2352;
1129
1130         block = sector >> compr_img->block_shift;
1131         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1132
1133         if (block == compr_img->current_block) {
1134                 //printf("hit sect %d\n", sector);
1135                 goto finish;
1136         }
1137
1138         if (sector >= compr_img->index_len * 16) {
1139                 SysPrintf("sector %d is past img end\n", sector);
1140                 return -1;
1141         }
1142
1143         start_byte = compr_img->index_table[block] & 0x7fffffff;
1144         if (fseek(cdHandle, start_byte, SEEK_SET) != 0) {
1145                 SysPrintf("seek error for block %d at %x: ",
1146                         block, start_byte);
1147                 perror(NULL);
1148                 return -1;
1149         }
1150
1151         is_compressed = !(compr_img->index_table[block] & 0x80000000);
1152         size = (compr_img->index_table[block + 1] & 0x7fffffff) - start_byte;
1153         if (size > sizeof(compr_img->buff_compressed)) {
1154                 SysPrintf("block %d is too large: %u\n", block, size);
1155                 return -1;
1156         }
1157
1158         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1159                                 1, size, cdHandle) != size) {
1160                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1161                 perror(NULL);
1162                 return -1;
1163         }
1164
1165         if (is_compressed) {
1166                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1167                 cdbuffer_size = cdbuffer_size_expect;
1168                 ret = uncompress2(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1169                 if (ret != 0) {
1170                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1171                                         ret, block, sector);
1172                         return -1;
1173                 }
1174                 if (cdbuffer_size != cdbuffer_size_expect)
1175                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1176                                         cdbuffer_size_expect, sector);
1177         }
1178
1179         // done at last!
1180         compr_img->current_block = block;
1181
1182 finish:
1183         if (dest != cdbuffer) // copy avoid HACK
1184                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1185                         CD_FRAMESIZE_RAW);
1186         return CD_FRAMESIZE_RAW;
1187 }
1188
1189 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1190 {
1191         int ret;
1192
1193         fseek(f, base + sector * 2048, SEEK_SET);
1194         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1195
1196         // not really necessary, fake mode 2 header
1197         memset(cdbuffer, 0, 12 * 2);
1198         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1199         cdbuffer[12 + 3] = 1;
1200
1201         return ret;
1202 }
1203
1204 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1205         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1206 }
1207
1208 static unsigned char * CALLBACK ISOgetBuffer(void) {
1209         return cdbuffer + 12;
1210 }
1211
1212 static void PrintTracks(void) {
1213         int i;
1214
1215         for (i = 1; i <= numtracks; i++) {
1216                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1217                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1218                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1219                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1220         }
1221 }
1222
1223 // This function is invoked by the front-end when opening an ISO
1224 // file for playback
1225 static long CALLBACK ISOopen(void) {
1226         boolean isMode1ISO = FALSE;
1227         char alt_bin_filename[MAXPATHLEN];
1228         const char *bin_filename;
1229
1230         if (cdHandle != NULL) {
1231                 return 0; // it's already open
1232         }
1233
1234         cdHandle = fopen(GetIsoFile(), "rb");
1235         if (cdHandle == NULL) {
1236                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1237                         GetIsoFile(), strerror(errno));
1238                 return -1;
1239         }
1240
1241         SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1242
1243         cddaBigEndian = FALSE;
1244         subChanMixed = FALSE;
1245         subChanRaw = FALSE;
1246         pregapOffset = 0;
1247         cdrIsoMultidiskCount = 1;
1248         multifile = 0;
1249
1250         CDR_getBuffer = ISOgetBuffer;
1251         cdimg_read_func = cdread_normal;
1252
1253         if (parsetoc(GetIsoFile()) == 0) {
1254                 SysPrintf("[+toc]");
1255         }
1256         else if (parseccd(GetIsoFile()) == 0) {
1257                 SysPrintf("[+ccd]");
1258         }
1259         else if (parsemds(GetIsoFile()) == 0) {
1260                 SysPrintf("[+mds]");
1261         }
1262         else if (parsecue(GetIsoFile()) == 0) {
1263                 SysPrintf("[+cue]");
1264         }
1265         if (handlepbp(GetIsoFile()) == 0) {
1266                 SysPrintf("[pbp]");
1267                 CDR_getBuffer = ISOgetBuffer_compr;
1268                 cdimg_read_func = cdread_compressed;
1269         }
1270         else if (handlecbin(GetIsoFile()) == 0) {
1271                 SysPrintf("[cbin]");
1272                 CDR_getBuffer = ISOgetBuffer_compr;
1273                 cdimg_read_func = cdread_compressed;
1274         }
1275
1276         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1277                 SysPrintf("[+sub]");
1278         }
1279         if (opensbifile(GetIsoFile()) == 0) {
1280                 SysPrintf("[+sbi]");
1281         }
1282
1283         fseek(cdHandle, 0, SEEK_END);
1284
1285         // maybe user selected metadata file instead of main .bin ..
1286         bin_filename = GetIsoFile();
1287         if (ftell(cdHandle) < 2352 * 0x10) {
1288                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1289                 FILE *tmpf = NULL;
1290                 size_t i;
1291                 char *p;
1292
1293                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1294                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1295                 if (strlen(alt_bin_filename) >= 4) {
1296                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1297                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1298                                 strcpy(p, exts[i]);
1299                                 tmpf = fopen(alt_bin_filename, "rb");
1300                                 if (tmpf != NULL)
1301                                         break;
1302                         }
1303                 }
1304                 if (tmpf != NULL) {
1305                         bin_filename = alt_bin_filename;
1306                         fclose(cdHandle);
1307                         cdHandle = tmpf;
1308                         fseek(cdHandle, 0, SEEK_END);
1309                 }
1310         }
1311
1312         // guess whether it is mode1/2048
1313         if (ftell(cdHandle) % 2048 == 0) {
1314                 unsigned int modeTest = 0;
1315                 fseek(cdHandle, 0, SEEK_SET);
1316                 fread(&modeTest, 4, 1, cdHandle);
1317                 if (SWAP32(modeTest) != 0xffffff00) {
1318                         SysPrintf("[2048]");
1319                         isMode1ISO = TRUE;
1320                 }
1321         }
1322         fseek(cdHandle, 0, SEEK_SET);
1323
1324         SysPrintf(".\n");
1325
1326         PrintTracks();
1327
1328         if (subChanMixed)
1329                 cdimg_read_func = cdread_sub_mixed;
1330         else if (isMode1ISO)
1331                 cdimg_read_func = cdread_2048;
1332
1333         // make sure we have another handle open for cdda
1334         if (numtracks > 1 && ti[1].handle == NULL) {
1335                 ti[1].handle = fopen(bin_filename, "rb");
1336         }
1337         cdda_cur_sector = 0;
1338         cdda_file_offset = 0;
1339
1340         return 0;
1341 }
1342
1343 static long CALLBACK ISOclose(void) {
1344         int i;
1345
1346         if (cdHandle != NULL) {
1347                 fclose(cdHandle);
1348                 cdHandle = NULL;
1349         }
1350         if (subHandle != NULL) {
1351                 fclose(subHandle);
1352                 subHandle = NULL;
1353         }
1354         stopCDDA();
1355         cddaHandle = NULL;
1356
1357         if (compr_img != NULL) {
1358                 free(compr_img->index_table);
1359                 free(compr_img);
1360                 compr_img = NULL;
1361         }
1362
1363         for (i = 1; i <= numtracks; i++) {
1364                 if (ti[i].handle != NULL) {
1365                         fclose(ti[i].handle);
1366                         ti[i].handle = NULL;
1367                 }
1368         }
1369         numtracks = 0;
1370         ti[1].type = 0;
1371         UnloadSBI();
1372
1373         memset(cdbuffer, 0, sizeof(cdbuffer));
1374         CDR_getBuffer = ISOgetBuffer;
1375
1376         return 0;
1377 }
1378
1379 static long CALLBACK ISOinit(void) {
1380         assert(cdHandle == NULL);
1381         assert(subHandle == NULL);
1382
1383         return 0; // do nothing
1384 }
1385
1386 static long CALLBACK ISOshutdown(void) {
1387         ISOclose();
1388         return 0;
1389 }
1390
1391 // return Starting and Ending Track
1392 // buffer:
1393 //  byte 0 - start track
1394 //  byte 1 - end track
1395 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1396         buffer[0] = 1;
1397
1398         if (numtracks > 0) {
1399                 buffer[1] = numtracks;
1400         }
1401         else {
1402                 buffer[1] = 1;
1403         }
1404
1405         return 0;
1406 }
1407
1408 // return Track Time
1409 // buffer:
1410 //  byte 0 - frame
1411 //  byte 1 - second
1412 //  byte 2 - minute
1413 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1414         if (track == 0) {
1415                 unsigned int sect;
1416                 unsigned char time[3];
1417                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1418                 sec2msf(sect, (char *)time);
1419                 buffer[2] = time[0];
1420                 buffer[1] = time[1];
1421                 buffer[0] = time[2];
1422         }
1423         else if (numtracks > 0 && track <= numtracks) {
1424                 buffer[2] = ti[track].start[0];
1425                 buffer[1] = ti[track].start[1];
1426                 buffer[0] = ti[track].start[2];
1427         }
1428         else {
1429                 buffer[2] = 0;
1430                 buffer[1] = 2;
1431                 buffer[0] = 0;
1432         }
1433
1434         return 0;
1435 }
1436
1437 // decode 'raw' subchannel data ripped by cdrdao
1438 static void DecodeRawSubData(void) {
1439         unsigned char subQData[12];
1440         int i;
1441
1442         memset(subQData, 0, sizeof(subQData));
1443
1444         for (i = 0; i < 8 * 12; i++) {
1445                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1446                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1447                 }
1448         }
1449
1450         memcpy(&subbuffer[12], subQData, 12);
1451 }
1452
1453 // read track
1454 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1455 // uses bcd format
1456 static long CALLBACK ISOreadTrack(unsigned char *time) {
1457         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1458         long ret;
1459
1460         if (cdHandle == NULL) {
1461                 return -1;
1462         }
1463
1464         if (pregapOffset) {
1465                 subChanMissing = FALSE;
1466                 if (sector >= pregapOffset) {
1467                         sector -= 2 * 75;
1468                         if (sector < pregapOffset)
1469                                 subChanMissing = TRUE;
1470                 }
1471         }
1472
1473         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1474         if (ret < 0)
1475                 return -1;
1476
1477         if (subHandle != NULL) {
1478                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1479                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1480
1481                 if (subChanRaw) DecodeRawSubData();
1482         }
1483
1484         return 0;
1485 }
1486
1487 // plays cdda audio
1488 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1489 // does NOT uses bcd format
1490 static long CALLBACK ISOplay(unsigned char *time) {
1491         unsigned int i;
1492
1493         if (numtracks <= 1)
1494                 return 0;
1495
1496         // find the track
1497         cdda_cur_sector = msf2sec((char *)time);
1498         for (i = numtracks; i > 1; i--) {
1499                 cdda_first_sector = msf2sec(ti[i].start);
1500                 if (cdda_first_sector <= cdda_cur_sector + 2 * 75)
1501                         break;
1502         }
1503         cdda_file_offset = ti[i].start_offset;
1504
1505         // find the file that contains this track
1506         for (; i > 1; i--)
1507                 if (ti[i].handle != NULL)
1508                         break;
1509
1510         cddaHandle = ti[i].handle;
1511
1512         if (SPU_playCDDAchannel != NULL)
1513                 startCDDA();
1514
1515         return 0;
1516 }
1517
1518 // stops cdda audio
1519 static long CALLBACK ISOstop(void) {
1520         stopCDDA();
1521         return 0;
1522 }
1523
1524 // gets subchannel data
1525 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1526         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1527                 return subbuffer;
1528         }
1529
1530         return NULL;
1531 }
1532
1533 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1534         u32 sect;
1535
1536         CDR__getStatus(stat);
1537
1538         if (playing) {
1539                 stat->Type = 0x02;
1540                 stat->Status |= 0x80;
1541         }
1542         else {
1543                 // BIOS - boot ID (CD type)
1544                 stat->Type = ti[1].type;
1545         }
1546
1547         // relative -> absolute time
1548         sect = cddaCurPos;
1549         sec2msf(sect, (char *)stat->Time);
1550
1551         return 0;
1552 }
1553
1554 // read CDDA sector into buffer
1555 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1556         unsigned char msf[3] = {m, s, f};
1557         unsigned int file, track, track_start = 0;
1558         int ret;
1559
1560         cddaCurPos = msf2sec((char *)msf);
1561
1562         // find current track index
1563         for (track = numtracks; ; track--) {
1564                 track_start = msf2sec(ti[track].start);
1565                 if (track_start <= cddaCurPos)
1566                         break;
1567                 if (track == 1)
1568                         break;
1569         }
1570
1571         // data tracks play silent
1572         if (ti[track].type != CDDA) {
1573                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1574                 return 0;
1575         }
1576
1577         file = 1;
1578         if (multifile) {
1579                 // find the file that contains this track
1580                 for (file = track; file > 1; file--)
1581                         if (ti[file].handle != NULL)
1582                                 break;
1583         }
1584
1585         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1586                 buffer, cddaCurPos - track_start);
1587         if (ret != CD_FRAMESIZE_RAW) {
1588                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1589                 return -1;
1590         }
1591
1592         if (cddaBigEndian) {
1593                 int i;
1594                 unsigned char tmp;
1595
1596                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1597                         tmp = buffer[i * 2];
1598                         buffer[i * 2] = buffer[i * 2 + 1];
1599                         buffer[i * 2 + 1] = tmp;
1600                 }
1601         }
1602
1603         return 0;
1604 }
1605
1606 void cdrIsoInit(void) {
1607         CDR_init = ISOinit;
1608         CDR_shutdown = ISOshutdown;
1609         CDR_open = ISOopen;
1610         CDR_close = ISOclose;
1611         CDR_getTN = ISOgetTN;
1612         CDR_getTD = ISOgetTD;
1613         CDR_readTrack = ISOreadTrack;
1614         CDR_getBuffer = ISOgetBuffer;
1615         CDR_play = ISOplay;
1616         CDR_stop = ISOstop;
1617         CDR_getBufferSub = ISOgetBufferSub;
1618         CDR_getStatus = ISOgetStatus;
1619         CDR_readCDDA = ISOreadCDDA;
1620
1621         CDR_getDriveLetter = CDR__getDriveLetter;
1622         CDR_configure = CDR__configure;
1623         CDR_test = CDR__test;
1624         CDR_about = CDR__about;
1625         CDR_setfilename = CDR__setfilename;
1626
1627         numtracks = 0;
1628 }
1629
1630 int cdrIsoActive(void) {
1631         return (cdHandle != NULL);
1632 }