libpcsxcore/cdriso.c

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