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 02111-1307 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 #else
  32 #include <pthread.h>
  33 #include <sys/time.h>
  34 #include <unistd.h>
  35 #endif
  36 #include <zlib.h>
  37
  38 unsigned int cdrIsoMultidiskCount;
  39 unsigned int cdrIsoMultidiskSelect;
  40
  41 static FILE *cdHandle = NULL;
  42 static FILE *cddaHandle = NULL;
  43 static FILE *subHandle = NULL;
  44
  45 static boolean subChanMixed = FALSE;
  46 static boolean subChanRaw = FALSE;
  47 static boolean subChanMissing = FALSE;
  48
  49 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
  50 static unsigned char subbuffer[SUB_FRAMESIZE];
  51
  52 static unsigned char sndbuffer[CD_FRAMESIZE_RAW * 10];
  53
  54 #define CDDA_FRAMETIME                  (1000 * (sizeof(sndbuffer) / CD_FRAMESIZE_RAW) / 75)
  55
  56 #ifdef _WIN32
  57 static HANDLE threadid;
  58 #else
  59 static pthread_t threadid;
  60 #endif
  61 static unsigned int initial_offset = 0;
  62 static boolean playing = FALSE;
  63 static boolean cddaBigEndian = FALSE;
  64 // cdda sectors in toc, byte offset in file
  65 static unsigned int cdda_cur_sector;
  66 static unsigned int cdda_first_sector;
  67 static unsigned int cdda_file_offset;
  68 /* Frame offset into CD image where pregap data would be found if it was there.
  69  * If a game seeks there we must *not* return subchannel data since it's
  70  * not in the CD image, so that cdrom code can fake subchannel data instead.
  71  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  72 static unsigned int pregapOffset;
  73
  74 // compressed image stuff
  75 static struct {
  76         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  77         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  78         unsigned int *index_table;
  79         unsigned int index_len;
  80         unsigned int block_shift;
  81         unsigned int current_block;
  82         unsigned int sector_in_blk;
  83 } *compr_img;
  84
  85 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
  86
  87 char* CALLBACK CDR__getDriveLetter(void);
  88 long CALLBACK CDR__configure(void);
  89 long CALLBACK CDR__test(void);
  90 void CALLBACK CDR__about(void);
  91 long CALLBACK CDR__setfilename(char *filename);
  92 long CALLBACK CDR__getStatus(struct CdrStat *stat);
  93
  94 static void DecodeRawSubData(void);
  95
  96 extern void *hCDRDriver;
  97
  98 struct trackinfo {
  99         enum {DATA, CDDA} type;
 100         char start[3];          // MSF-format
 101         char length[3];         // MSF-format
 102         FILE *handle;           // for multi-track images CDDA
 103         unsigned int start_offset; // byte offset from start of above file
 104 };
 105
 106 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 107
 108 static int numtracks = 0;
 109 static struct trackinfo ti[MAXTRACKS];
 110
 111 // get a sector from a msf-array
 112 static unsigned int msf2sec(char *msf) {
 113         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 114 }
 115
 116 static void sec2msf(unsigned int s, char *msf) {
 117         msf[0] = s / 75 / 60;
 118         s = s - msf[0] * 75 * 60;
 119         msf[1] = s / 75;
 120         s = s - msf[1] * 75;
 121         msf[2] = s;
 122 }
 123
 124 // divide a string of xx:yy:zz into m, s, f
 125 static void tok2msf(char *time, char *msf) {
 126         char *token;
 127
 128         token = strtok(time, ":");
 129         if (token) {
 130                 msf[0] = atoi(token);
 131         }
 132         else {
 133                 msf[0] = 0;
 134         }
 135
 136         token = strtok(NULL, ":");
 137         if (token) {
 138                 msf[1] = atoi(token);
 139         }
 140         else {
 141                 msf[1] = 0;
 142         }
 143
 144         token = strtok(NULL, ":");
 145         if (token) {
 146                 msf[2] = atoi(token);
 147         }
 148         else {
 149                 msf[2] = 0;
 150         }
 151 }
 152
 153 #ifndef _WIN32
 154 static long GetTickCount(void) {
 155         static time_t           initial_time = 0;
 156         struct timeval          now;
 157
 158         gettimeofday(&now, NULL);
 159
 160         if (initial_time == 0) {
 161                 initial_time = now.tv_sec;
 162         }
 163
 164         return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
 165 }
 166 #endif
 167
 168 // this thread plays audio data
 169 #ifdef _WIN32
 170 static void playthread(void *param)
 171 #else
 172 static void *playthread(void *param)
 173 #endif
 174 {
 175         long osleep, d, t, i, s;
 176         unsigned char   tmp;
 177         int ret = 0, sector_offs;
 178
 179         t = GetTickCount();
 180
 181         while (playing) {
 182                 s = 0;
 183                 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
 184                         sector_offs = cdda_cur_sector - cdda_first_sector;
 185                         if (sector_offs < 0) {
 186                                 d = CD_FRAMESIZE_RAW;
 187                                 memset(sndbuffer + s, 0, d);
 188                         }
 189                         else {
 190                                 d = cdimg_read_func(cddaHandle, cdda_file_offset,
 191                                         sndbuffer + s, sector_offs);
 192                                 if (d < CD_FRAMESIZE_RAW)
 193                                         break;
 194                         }
 195
 196                         s += d;
 197                         cdda_cur_sector++;
 198                 }
 199
 200                 if (s == 0) {
 201                         playing = FALSE;
 202                         initial_offset = 0;
 203                         break;
 204                 }
 205
 206                 if (!cdr.Muted && playing) {
 207                         if (cddaBigEndian) {
 208                                 for (i = 0; i < s / 2; i++) {
 209                                         tmp = sndbuffer[i * 2];
 210                                         sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
 211                                         sndbuffer[i * 2 + 1] = tmp;
 212                                 }
 213                         }
 214
 215                         // can't do it yet due to readahead..
 216                         //cdrAttenuate((short *)sndbuffer, s / 4, 1);
 217                         do {
 218                                 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
 219                                 if (ret == 0x7761)
 220                                         usleep(6 * 1000);
 221                         } while (ret == 0x7761 && playing); // rearmed_wait
 222                 }
 223
 224                 if (ret != 0x676f) { // !rearmed_go
 225                         // do approx sleep
 226                         long now;
 227
 228                         // HACK: stop feeding data while emu is paused
 229                         extern int stop;
 230                         while (stop && playing)
 231                                 usleep(10000);
 232
 233                         now = GetTickCount();
 234                         osleep = t - now;
 235                         if (osleep <= 0) {
 236                                 osleep = 1;
 237                                 t = now;
 238                         }
 239                         else if (osleep > CDDA_FRAMETIME) {
 240                                 osleep = CDDA_FRAMETIME;
 241                                 t = now;
 242                         }
 243
 244                         usleep(osleep * 1000);
 245                         t += CDDA_FRAMETIME;
 246                 }
 247
 248         }
 249
 250 #ifdef _WIN32
 251         _endthread();
 252 #else
 253         pthread_exit(0);
 254         return NULL;
 255 #endif
 256 }
 257
 258 // stop the CDDA playback
 259 static void stopCDDA() {
 260         if (!playing) {
 261                 return;
 262         }
 263
 264         playing = FALSE;
 265 #ifdef _WIN32
 266         WaitForSingleObject(threadid, INFINITE);
 267 #else
 268         pthread_join(threadid, NULL);
 269 #endif
 270 }
 271
 272 // start the CDDA playback
 273 static void startCDDA(void) {
 274         if (playing) {
 275                 stopCDDA();
 276         }
 277
 278         playing = TRUE;
 279
 280 #ifdef _WIN32
 281         threadid = (HANDLE)_beginthread(playthread, 0, NULL);
 282 #else
 283         pthread_create(&threadid, NULL, playthread, NULL);
 284 #endif
 285 }
 286
 287 // this function tries to get the .toc file of the given .bin
 288 // the necessary data is put into the ti (trackinformation)-array
 289 static int parsetoc(const char *isofile) {
 290         char                    tocname[MAXPATHLEN];
 291         FILE                    *fi;
 292         char                    linebuf[256], dummy[256], name[256];
 293         char                    *token;
 294         char                    time[20], time2[20];
 295         unsigned int    t, sector_offs;
 296
 297         numtracks = 0;
 298
 299         // copy name of the iso and change extension from .bin to .toc
 300         strncpy(tocname, isofile, sizeof(tocname));
 301         tocname[MAXPATHLEN - 1] = '\0';
 302         if (strlen(tocname) >= 4) {
 303                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 304         }
 305         else {
 306                 return -1;
 307         }
 308
 309         if ((fi = fopen(tocname, "r")) == NULL) {
 310                 // try changing extension to .cue (to satisfy some stupid tutorials)
 311                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 312                 if ((fi = fopen(tocname, "r")) == NULL) {
 313                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 314                         strcpy(tocname, isofile);
 315                         t = strlen(tocname);
 316                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 317                                 tocname[t - 4] = '\0';
 318                                 if ((fi = fopen(tocname, "r")) == NULL) {
 319                                         return -1;
 320                                 }
 321                         }
 322                         else {
 323                                 return -1;
 324                         }
 325                 }
 326         }
 327
 328         memset(&ti, 0, sizeof(ti));
 329         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 330
 331         sector_offs = 2 * 75;
 332
 333         // parse the .toc file
 334         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 335                 // search for tracks
 336                 strncpy(dummy, linebuf, sizeof(linebuf));
 337                 token = strtok(dummy, " ");
 338
 339                 if (token == NULL) continue;
 340
 341                 if (!strcmp(token, "TRACK")) {
 342                         // get type of track
 343                         token = strtok(NULL, " ");
 344                         numtracks++;
 345
 346                         if (!strncmp(token, "MODE2_RAW", 9)) {
 347                                 ti[numtracks].type = DATA;
 348                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 349
 350                                 // check if this image contains mixed subchannel data
 351                                 token = strtok(NULL, " ");
 352                                 if (token != NULL && !strncmp(token, "RW_RAW", 6)) {
 353                                         subChanMixed = TRUE;
 354                                         subChanRaw = TRUE;
 355                                 }
 356                         }
 357                         else if (!strncmp(token, "AUDIO", 5)) {
 358                                 ti[numtracks].type = CDDA;
 359                         }
 360                 }
 361                 else if (!strcmp(token, "DATAFILE")) {
 362                         if (ti[numtracks].type == CDDA) {
 363                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 364                                 ti[numtracks].start_offset = t;
 365                                 t /= CD_FRAMESIZE_RAW + (subChanMixed ? SUB_FRAMESIZE : 0);
 366                                 t += sector_offs;
 367                                 sec2msf(t, (char *)&ti[numtracks].start);
 368                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 369                         }
 370                         else {
 371                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 372                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 373                         }
 374                 }
 375                 else if (!strcmp(token, "FILE")) {
 376                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 377                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 378                         ti[numtracks].start_offset = t;
 379                         t /= CD_FRAMESIZE_RAW + (subChanMixed ? SUB_FRAMESIZE : 0);
 380                         t += msf2sec(ti[numtracks].start) + sector_offs;
 381                         sec2msf(t, (char *)&ti[numtracks].start);
 382                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 383                 }
 384                 else if (!strcmp(token, "ZERO")) {
 385                         sscanf(linebuf, "ZERO AUDIO RW_RAW %8s", time);
 386                         tok2msf((char *)&time, dummy);
 387                         sector_offs += msf2sec(dummy);
 388                         if (numtracks > 1) {
 389                                 t = ti[numtracks - 1].start_offset;
 390                                 t /= CD_FRAMESIZE_RAW + (subChanMixed ? SUB_FRAMESIZE : 0);
 391                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 392                         }
 393                 }
 394         }
 395
 396         fclose(fi);
 397
 398         return 0;
 399 }
 400
 401 // this function tries to get the .cue file of the given .bin
 402 // the necessary data is put into the ti (trackinformation)-array
 403 static int parsecue(const char *isofile) {
 404         char                    cuename[MAXPATHLEN];
 405         char                    filepath[MAXPATHLEN];
 406         char                    *incue_fname;
 407         FILE                    *fi;
 408         char                    *token;
 409         char                    time[20];
 410         char                    *tmp;
 411         char                    linebuf[256], tmpb[256], dummy[256];
 412         unsigned int    incue_max_len;
 413         unsigned int    t, file_len, mode, sector_offs;
 414         unsigned int    sector_size = 2352;
 415
 416         numtracks = 0;
 417
 418         // copy name of the iso and change extension from .bin to .cue
 419         strncpy(cuename, isofile, sizeof(cuename));
 420         cuename[MAXPATHLEN - 1] = '\0';
 421         if (strlen(cuename) >= 4) {
 422                 strcpy(cuename + strlen(cuename) - 4, ".cue");
 423         }
 424         else {
 425                 return -1;
 426         }
 427
 428         if ((fi = fopen(cuename, "r")) == NULL) {
 429                 return -1;
 430         }
 431
 432         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 433         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 434         // that...
 435         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 436                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 437                         // Don't proceed further, as this is actually a .toc file rather
 438                         // than a .cue file.
 439                         fclose(fi);
 440                         return parsetoc(isofile);
 441                 }
 442                 fseek(fi, 0, SEEK_SET);
 443         }
 444
 445         // build a path for files referenced in .cue
 446         strncpy(filepath, cuename, sizeof(filepath));
 447         tmp = strrchr(filepath, '/') + 1;
 448         if (tmp == NULL)
 449                 tmp = strrchr(filepath, '\\') + 1;
 450         if (tmp == NULL)
 451                 tmp = filepath;
 452         *tmp = 0;
 453         filepath[sizeof(filepath) - 1] = 0;
 454         incue_fname = tmp;
 455         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 456
 457         memset(&ti, 0, sizeof(ti));
 458
 459         file_len = 0;
 460         sector_offs = 2 * 75;
 461
 462         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 463                 strncpy(dummy, linebuf, sizeof(linebuf));
 464                 token = strtok(dummy, " ");
 465
 466                 if (token == NULL) {
 467                         continue;
 468                 }
 469
 470                 if (!strcmp(token, "TRACK")) {
 471                         numtracks++;
 472
 473                         sector_size = 0;
 474                         if (strstr(linebuf, "AUDIO") != NULL) {
 475                                 ti[numtracks].type = CDDA;
 476                                 sector_size = 2352;
 477                         }
 478                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 479                                 ti[numtracks].type = DATA;
 480                         else {
 481                                 SysPrintf(".cue: failed to parse TRACK\n");
 482                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 483                         }
 484                         if (sector_size == 0)
 485                                 sector_size = 2352;
 486                 }
 487                 else if (!strcmp(token, "INDEX")) {
 488                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 489                                 SysPrintf(".cue: failed to parse INDEX\n");
 490                         tok2msf(time, (char *)&ti[numtracks].start);
 491
 492                         t = msf2sec(ti[numtracks].start);
 493                         ti[numtracks].start_offset = t * sector_size;
 494                         t += sector_offs;
 495                         sec2msf(t, ti[numtracks].start);
 496
 497                         // default track length to file length
 498                         t = file_len - ti[numtracks].start_offset / sector_size;
 499                         sec2msf(t, ti[numtracks].length);
 500
 501                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 502                                 // this track uses the same file as the last,
 503                                 // start of this track is last track's end
 504                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 505                                 sec2msf(t, ti[numtracks - 1].length);
 506                         }
 507                         if (numtracks > 1 && pregapOffset == -1)
 508                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 509                 }
 510                 else if (!strcmp(token, "PREGAP")) {
 511                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 512                                 tok2msf(time, dummy);
 513                                 sector_offs += msf2sec(dummy);
 514                         }
 515                         pregapOffset = -1; // mark to fill track start_offset
 516                 }
 517                 else if (!strcmp(token, "FILE")) {
 518                         t = sscanf(linebuf, " FILE \"%256[^\"]\"", tmpb);
 519                         if (t != 1)
 520                                 sscanf(linebuf, " FILE %256s", tmpb);
 521
 522                         // absolute path?
 523                         ti[numtracks + 1].handle = fopen(tmpb, "rb");
 524                         if (ti[numtracks + 1].handle == NULL) {
 525                                 // relative to .cue?
 526                                 tmp = strrchr(tmpb, '\\');
 527                                 if (tmp == NULL)
 528                                         tmp = strrchr(tmpb, '/');
 529                                 if (tmp != NULL)
 530                                         tmp++;
 531                                 else
 532                                         tmp = tmpb;
 533                                 strncpy(incue_fname, tmp, incue_max_len);
 534                                 ti[numtracks + 1].handle = fopen(filepath, "rb");
 535                         }
 536
 537                         // update global offset if this is not first file in this .cue
 538                         if (numtracks + 1 > 1)
 539                                 sector_offs += file_len;
 540
 541                         file_len = 0;
 542                         if (ti[numtracks + 1].handle == NULL) {
 543                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 544                                 continue;
 545                         }
 546                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 547                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 548
 549                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 550                                 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
 551                         {
 552                                 // user selected .cue as image file, use it's data track instead
 553                                 fclose(cdHandle);
 554                                 cdHandle = fopen(filepath, "rb");
 555                         }
 556                 }
 557         }
 558
 559         fclose(fi);
 560
 561         return 0;
 562 }
 563
 564 // this function tries to get the .ccd file of the given .img
 565 // the necessary data is put into the ti (trackinformation)-array
 566 static int parseccd(const char *isofile) {
 567         char                    ccdname[MAXPATHLEN];
 568         FILE                    *fi;
 569         char                    linebuf[256];
 570         unsigned int    t;
 571
 572         numtracks = 0;
 573
 574         // copy name of the iso and change extension from .img to .ccd
 575         strncpy(ccdname, isofile, sizeof(ccdname));
 576         ccdname[MAXPATHLEN - 1] = '\0';
 577         if (strlen(ccdname) >= 4) {
 578                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 579         }
 580         else {
 581                 return -1;
 582         }
 583
 584         if ((fi = fopen(ccdname, "r")) == NULL) {
 585                 return -1;
 586         }
 587
 588         memset(&ti, 0, sizeof(ti));
 589
 590         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 591                 if (!strncmp(linebuf, "[TRACK", 6)){
 592                         numtracks++;
 593                 }
 594                 else if (!strncmp(linebuf, "MODE=", 5)) {
 595                         sscanf(linebuf, "MODE=%d", &t);
 596                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 597                 }
 598                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 599                         sscanf(linebuf, "INDEX 1=%d", &t);
 600                         sec2msf(t + 2 * 75, ti[numtracks].start);
 601                         ti[numtracks].start_offset = t * 2352;
 602
 603                         // If we've already seen another track, this is its end
 604                         if (numtracks > 1) {
 605                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 606                                 sec2msf(t, ti[numtracks - 1].length);
 607                         }
 608                 }
 609         }
 610
 611         fclose(fi);
 612
 613         // Fill out the last track's end based on size
 614         if (numtracks >= 1) {
 615                 fseek(cdHandle, 0, SEEK_END);
 616                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 617                 sec2msf(t, ti[numtracks].length);
 618         }
 619
 620         return 0;
 621 }
 622
 623 // this function tries to get the .mds file of the given .mdf
 624 // the necessary data is put into the ti (trackinformation)-array
 625 static int parsemds(const char *isofile) {
 626         char                    mdsname[MAXPATHLEN];
 627         FILE                    *fi;
 628         unsigned int    offset, extra_offset, l, i;
 629         unsigned short  s;
 630
 631         numtracks = 0;
 632
 633         // copy name of the iso and change extension from .mdf to .mds
 634         strncpy(mdsname, isofile, sizeof(mdsname));
 635         mdsname[MAXPATHLEN - 1] = '\0';
 636         if (strlen(mdsname) >= 4) {
 637                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 638         }
 639         else {
 640                 return -1;
 641         }
 642
 643         if ((fi = fopen(mdsname, "rb")) == NULL) {
 644                 return -1;
 645         }
 646
 647         memset(&ti, 0, sizeof(ti));
 648
 649         // check if it's a valid mds file
 650         fread(&i, 1, sizeof(unsigned int), fi);
 651         i = SWAP32(i);
 652         if (i != 0x4944454D) {
 653                 // not an valid mds file
 654                 fclose(fi);
 655                 return -1;
 656         }
 657
 658         // get offset to session block
 659         fseek(fi, 0x50, SEEK_SET);
 660         fread(&offset, 1, sizeof(unsigned int), fi);
 661         offset = SWAP32(offset);
 662
 663         // get total number of tracks
 664         offset += 14;
 665         fseek(fi, offset, SEEK_SET);
 666         fread(&s, 1, sizeof(unsigned short), fi);
 667         s = SWAP16(s);
 668         numtracks = s;
 669
 670         // get offset to track blocks
 671         fseek(fi, 4, SEEK_CUR);
 672         fread(&offset, 1, sizeof(unsigned int), fi);
 673         offset = SWAP32(offset);
 674
 675         // skip lead-in data
 676         while (1) {
 677                 fseek(fi, offset + 4, SEEK_SET);
 678                 if (fgetc(fi) < 0xA0) {
 679                         break;
 680                 }
 681                 offset += 0x50;
 682         }
 683
 684         // check if the image contains mixed subchannel data
 685         fseek(fi, offset + 1, SEEK_SET);
 686         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 687
 688         // read track data
 689         for (i = 1; i <= numtracks; i++) {
 690                 fseek(fi, offset, SEEK_SET);
 691
 692                 // get the track type
 693                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 694                 fseek(fi, 8, SEEK_CUR);
 695
 696                 // get the track starting point
 697                 ti[i].start[0] = fgetc(fi);
 698                 ti[i].start[1] = fgetc(fi);
 699                 ti[i].start[2] = fgetc(fi);
 700
 701                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 702                 extra_offset = SWAP32(extra_offset);
 703
 704                 // get track start offset (in .mdf)
 705                 fseek(fi, offset + 0x28, SEEK_SET);
 706                 fread(&l, 1, sizeof(unsigned int), fi);
 707                 l = SWAP32(l);
 708                 ti[i].start_offset = l;
 709
 710                 // get pregap
 711                 fseek(fi, extra_offset, SEEK_SET);
 712                 fread(&l, 1, sizeof(unsigned int), fi);
 713                 l = SWAP32(l);
 714                 if (l != 0 && i > 1)
 715                         pregapOffset = msf2sec(ti[i].start);
 716
 717                 // get the track length
 718                 fread(&l, 1, sizeof(unsigned int), fi);
 719                 l = SWAP32(l);
 720                 sec2msf(l, ti[i].length);
 721
 722                 offset += 0x50;
 723         }
 724
 725         fclose(fi);
 726         return 0;
 727 }
 728
 729 static int handlepbp(const char *isofile) {
 730         struct {
 731                 unsigned int sig;
 732                 unsigned int dontcare[8];
 733                 unsigned int psar_offs;
 734         } pbp_hdr;
 735         struct {
 736                 unsigned char type;
 737                 unsigned char pad0;
 738                 unsigned char track;
 739                 char index0[3];
 740                 char pad1;
 741                 char index1[3];
 742         } toc_entry;
 743         struct {
 744                 unsigned int offset;
 745                 unsigned int size;
 746                 unsigned int dontcare[6];
 747         } index_entry;
 748         char psar_sig[11];
 749         unsigned int t, cd_length, cdimg_base;
 750         unsigned int offsettab[8], psisoimg_offs;
 751         const char *ext = NULL;
 752         int i, ret;
 753
 754         if (strlen(isofile) >= 4)
 755                 ext = isofile + strlen(isofile) - 4;
 756         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 757                 return -1;
 758
 759         numtracks = 0;
 760
 761         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 762         if (ret != sizeof(pbp_hdr)) {
 763                 SysPrintf("failed to read pbp\n");
 764                 goto fail_io;
 765         }
 766
 767         ret = fseek(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 768         if (ret != 0) {
 769                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 770                 goto fail_io;
 771         }
 772
 773         psisoimg_offs = pbp_hdr.psar_offs;
 774         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 775         psar_sig[10] = 0;
 776         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 777                 // multidisk image?
 778                 ret = fseek(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 779                 if (ret != 0) {
 780                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 781                         goto fail_io;
 782                 }
 783
 784                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 785                         SysPrintf("failed to read offsettab\n");
 786                         goto fail_io;
 787                 }
 788
 789                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 790                         if (offsettab[i] == 0)
 791                                 break;
 792                 }
 793                 cdrIsoMultidiskCount = i;
 794                 if (cdrIsoMultidiskCount == 0) {
 795                         SysPrintf("multidisk eboot has 0 images?\n");
 796                         goto fail_io;
 797                 }
 798
 799                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 800                         cdrIsoMultidiskSelect = 0;
 801
 802                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 803
 804                 ret = fseek(cdHandle, psisoimg_offs, SEEK_SET);
 805                 if (ret != 0) {
 806                         SysPrintf("failed to seek to %x\n", psisoimg_offs);
 807                         goto fail_io;
 808                 }
 809
 810                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 811                 psar_sig[10] = 0;
 812         }
 813
 814         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 815                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 816                 goto fail_io;
 817         }
 818
 819         // seek to TOC
 820         ret = fseek(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 821         if (ret != 0) {
 822                 SysPrintf("failed to seek to %x\n", psisoimg_offs + 0x800);
 823                 goto fail_io;
 824         }
 825
 826         // first 3 entries are special
 827         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 828         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 829         numtracks = btoi(toc_entry.index1[0]);
 830
 831         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 832         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 833                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 834
 835         for (i = 1; i <= numtracks; i++) {
 836                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 837
 838                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 839
 840                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 841                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 842                 ti[i].start_offset *= 2352;
 843                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 844                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 845                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 846
 847                 if (i > 1) {
 848                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 849                         sec2msf(t, ti[i - 1].length);
 850                 }
 851         }
 852         t = cd_length - ti[numtracks].start_offset / 2352;
 853         sec2msf(t, ti[numtracks].length);
 854
 855         // seek to ISO index
 856         ret = fseek(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 857         if (ret != 0) {
 858                 SysPrintf("failed to seek to ISO index\n");
 859                 goto fail_io;
 860         }
 861
 862         compr_img = calloc(1, sizeof(*compr_img));
 863         if (compr_img == NULL)
 864                 goto fail_io;
 865
 866         compr_img->block_shift = 4;
 867         compr_img->current_block = (unsigned int)-1;
 868
 869         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 870         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 871         if (compr_img->index_table == NULL)
 872                 goto fail_io;
 873
 874         cdimg_base = psisoimg_offs + 0x100000;
 875         for (i = 0; i < compr_img->index_len; i++) {
 876                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 877                 if (ret != sizeof(index_entry)) {
 878                         SysPrintf("failed to read index_entry #%d\n", i);
 879                         goto fail_index;
 880                 }
 881
 882                 if (index_entry.size == 0)
 883                         break;
 884
 885                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 886         }
 887         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 888
 889         return 0;
 890
 891 fail_index:
 892         free(compr_img->index_table);
 893         compr_img->index_table = NULL;
 894 fail_io:
 895         if (compr_img != NULL) {
 896                 free(compr_img);
 897                 compr_img = NULL;
 898         }
 899         return -1;
 900 }
 901
 902 static int handlecbin(const char *isofile) {
 903         struct
 904         {
 905                 char magic[4];
 906                 unsigned int header_size;
 907                 unsigned long long total_bytes;
 908                 unsigned int block_size;
 909                 unsigned char ver;              // 1
 910                 unsigned char align;
 911                 unsigned char rsv_06[2];
 912         } ciso_hdr;
 913         const char *ext = NULL;
 914         unsigned int index = 0, plain;
 915         int i, ret;
 916
 917         if (strlen(isofile) >= 5)
 918                 ext = isofile + strlen(isofile) - 5;
 919         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 920                 return -1;
 921
 922         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 923         if (ret != sizeof(ciso_hdr)) {
 924                 SysPrintf("failed to read ciso header\n");
 925                 return -1;
 926         }
 927
 928         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 929                 SysPrintf("bad ciso header\n");
 930                 return -1;
 931         }
 932         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 933                 ret = fseek(cdHandle, ciso_hdr.header_size, SEEK_SET);
 934                 if (ret != 0) {
 935                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 936                         return -1;
 937                 }
 938         }
 939
 940         compr_img = calloc(1, sizeof(*compr_img));
 941         if (compr_img == NULL)
 942                 goto fail_io;
 943
 944         compr_img->block_shift = 0;
 945         compr_img->current_block = (unsigned int)-1;
 946
 947         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
 948         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 949         if (compr_img->index_table == NULL)
 950                 goto fail_io;
 951
 952         ret = fread(compr_img->index_table, sizeof(compr_img->index_table[0]), compr_img->index_len, cdHandle);
 953         if (ret != compr_img->index_len) {
 954                 SysPrintf("failed to read index table\n");
 955                 goto fail_index;
 956         }
 957
 958         for (i = 0; i < compr_img->index_len + 1; i++) {
 959                 index = compr_img->index_table[i];
 960                 plain = index & 0x80000000;
 961                 index &= 0x7fffffff;
 962                 compr_img->index_table[i] = (index << ciso_hdr.align) | plain;
 963         }
 964         if ((long long)index << ciso_hdr.align >= 0x80000000ll)
 965                 SysPrintf("warning: ciso img too large, expect problems\n");
 966
 967         return 0;
 968
 969 fail_index:
 970         free(compr_img->index_table);
 971         compr_img->index_table = NULL;
 972 fail_io:
 973         if (compr_img != NULL) {
 974                 free(compr_img);
 975                 compr_img = NULL;
 976         }
 977         return -1;
 978 }
 979
 980 // this function tries to get the .sub file of the given .img
 981 static int opensubfile(const char *isoname) {
 982         char            subname[MAXPATHLEN];
 983
 984         // copy name of the iso and change extension from .img to .sub
 985         strncpy(subname, isoname, sizeof(subname));
 986         subname[MAXPATHLEN - 1] = '\0';
 987         if (strlen(subname) >= 4) {
 988                 strcpy(subname + strlen(subname) - 4, ".sub");
 989         }
 990         else {
 991                 return -1;
 992         }
 993
 994         subHandle = fopen(subname, "rb");
 995         if (subHandle == NULL) {
 996                 return -1;
 997         }
 998
 999         return 0;
1000 }
1001
1002 static int opensbifile(const char *isoname) {
1003         char            sbiname[MAXPATHLEN];
1004         int             s;
1005
1006         strncpy(sbiname, isoname, sizeof(sbiname));
1007         sbiname[MAXPATHLEN - 1] = '\0';
1008         if (strlen(sbiname) >= 4) {
1009                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1010         }
1011         else {
1012                 return -1;
1013         }
1014
1015         fseek(cdHandle, 0, SEEK_END);
1016         s = ftell(cdHandle) / 2352;
1017
1018         return LoadSBI(sbiname, s);
1019 }
1020
1021 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1022 {
1023         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1024         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1025 }
1026
1027 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1028 {
1029         int ret;
1030
1031         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1032         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1033         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1034
1035         if (subChanRaw) DecodeRawSubData();
1036
1037         return ret;
1038 }
1039
1040 static int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1041 {
1042         static z_stream z;
1043         int ret = 0;
1044
1045         if (z.zalloc == NULL) {
1046                 // XXX: one-time leak here..
1047                 z.next_in = Z_NULL;
1048                 z.avail_in = 0;
1049                 z.zalloc = Z_NULL;
1050                 z.zfree = Z_NULL;
1051                 z.opaque = Z_NULL;
1052                 ret = inflateInit2(&z, -15);
1053         }
1054         else
1055                 ret = inflateReset(&z);
1056         if (ret != Z_OK)
1057                 return ret;
1058
1059         z.next_in = in;
1060         z.avail_in = in_size;
1061         z.next_out = out;
1062         z.avail_out = *out_size;
1063
1064         ret = inflate(&z, Z_NO_FLUSH);
1065         //inflateEnd(&z);
1066
1067         *out_size -= z.avail_out;
1068         return ret == 1 ? 0 : ret;
1069 }
1070
1071 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1072 {
1073         unsigned long cdbuffer_size, cdbuffer_size_expect;
1074         unsigned int start_byte, size;
1075         int is_compressed;
1076         int ret, block;
1077
1078         if (base)
1079                 sector += base / 2352;
1080
1081         block = sector >> compr_img->block_shift;
1082         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1083
1084         if (block == compr_img->current_block) {
1085                 //printf("hit sect %d\n", sector);
1086                 goto finish;
1087         }
1088
1089         if (sector >= compr_img->index_len * 16) {
1090                 SysPrintf("sector %d is past img end\n", sector);
1091                 return -1;
1092         }
1093
1094         start_byte = compr_img->index_table[block] & 0x7fffffff;
1095         if (fseek(cdHandle, start_byte, SEEK_SET) != 0) {
1096                 SysPrintf("seek error for block %d at %x: ",
1097                         block, start_byte);
1098                 perror(NULL);
1099                 return -1;
1100         }
1101
1102         is_compressed = !(compr_img->index_table[block] & 0x80000000);
1103         size = (compr_img->index_table[block + 1] & 0x7fffffff) - start_byte;
1104         if (size > sizeof(compr_img->buff_compressed)) {
1105                 SysPrintf("block %d is too large: %u\n", block, size);
1106                 return -1;
1107         }
1108
1109         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1110                                 1, size, cdHandle) != size) {
1111                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1112                 perror(NULL);
1113                 return -1;
1114         }
1115
1116         if (is_compressed) {
1117                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1118                 cdbuffer_size = cdbuffer_size_expect;
1119                 ret = uncompress2(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1120                 if (ret != 0) {
1121                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1122                                         ret, block, sector);
1123                         return -1;
1124                 }
1125                 if (cdbuffer_size != cdbuffer_size_expect)
1126                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1127                                         cdbuffer_size_expect, sector);
1128         }
1129
1130         // done at last!
1131         compr_img->current_block = block;
1132
1133 finish:
1134         if (dest != cdbuffer) // copy avoid HACK
1135                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1136                         CD_FRAMESIZE_RAW);
1137         return CD_FRAMESIZE_RAW;
1138 }
1139
1140 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1141 {
1142         int ret;
1143
1144         fseek(f, base + sector * 2048, SEEK_SET);
1145         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1146
1147         // not really necessary, fake mode 2 header
1148         memset(cdbuffer, 0, 12 * 2);
1149         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1150         cdbuffer[12 + 3] = 1;
1151
1152         return ret;
1153 }
1154
1155 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1156         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1157 }
1158
1159 static unsigned char * CALLBACK ISOgetBuffer(void) {
1160         return cdbuffer + 12;
1161 }
1162
1163 static void PrintTracks(void) {
1164         int i;
1165
1166         for (i = 1; i <= numtracks; i++) {
1167                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1168                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1169                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1170                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1171         }
1172 }
1173
1174 // This function is invoked by the front-end when opening an ISO
1175 // file for playback
1176 static long CALLBACK ISOopen(void) {
1177         boolean isMode1ISO = FALSE;
1178
1179         if (cdHandle != NULL) {
1180                 return 0; // it's already open
1181         }
1182
1183         cdHandle = fopen(GetIsoFile(), "rb");
1184         if (cdHandle == NULL) {
1185                 return -1;
1186         }
1187
1188         SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1189
1190         cddaBigEndian = FALSE;
1191         subChanMixed = FALSE;
1192         subChanRaw = FALSE;
1193         pregapOffset = 0;
1194         cdrIsoMultidiskCount = 1;
1195
1196         CDR_getBuffer = ISOgetBuffer;
1197         cdimg_read_func = cdread_normal;
1198
1199         if (parsecue(GetIsoFile()) == 0) {
1200                 SysPrintf("[+cue]");
1201         }
1202         else if (parsetoc(GetIsoFile()) == 0) {
1203                 SysPrintf("[+toc]");
1204         }
1205         else if (parseccd(GetIsoFile()) == 0) {
1206                 SysPrintf("[+ccd]");
1207         }
1208         else if (parsemds(GetIsoFile()) == 0) {
1209                 SysPrintf("[+mds]");
1210         }
1211         if (handlepbp(GetIsoFile()) == 0) {
1212                 SysPrintf("[pbp]");
1213                 CDR_getBuffer = ISOgetBuffer_compr;
1214                 cdimg_read_func = cdread_compressed;
1215         }
1216         else if (handlecbin(GetIsoFile()) == 0) {
1217                 SysPrintf("[cbin]");
1218                 CDR_getBuffer = ISOgetBuffer_compr;
1219                 cdimg_read_func = cdread_compressed;
1220         }
1221
1222         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1223                 SysPrintf("[+sub]");
1224         }
1225         if (opensbifile(GetIsoFile()) == 0) {
1226                 SysPrintf("[+sbi]");
1227         }
1228
1229         // guess whether it is mode1/2048
1230         fseek(cdHandle, 0, SEEK_END);
1231         if (ftell(cdHandle) % 2048 == 0) {
1232                 unsigned int modeTest = 0;
1233                 fseek(cdHandle, 0, SEEK_SET);
1234                 fread(&modeTest, 4, 1, cdHandle);
1235                 if (SWAP32(modeTest) != 0xffffff00) {
1236                         SysPrintf("[2048]");
1237                         isMode1ISO = TRUE;
1238                 }
1239         }
1240         fseek(cdHandle, 0, SEEK_SET);
1241
1242         SysPrintf(".\n");
1243
1244         PrintTracks();
1245
1246         if (subChanMixed)
1247                 cdimg_read_func = cdread_sub_mixed;
1248         else if (isMode1ISO)
1249                 cdimg_read_func = cdread_2048;
1250
1251         // make sure we have another handle open for cdda
1252         if (numtracks > 1 && ti[1].handle == NULL) {
1253                 ti[1].handle = fopen(GetIsoFile(), "rb");
1254         }
1255         cdda_cur_sector = 0;
1256         cdda_file_offset = 0;
1257
1258         return 0;
1259 }
1260
1261 static long CALLBACK ISOclose(void) {
1262         int i;
1263
1264         if (cdHandle != NULL) {
1265                 fclose(cdHandle);
1266                 cdHandle = NULL;
1267         }
1268         if (subHandle != NULL) {
1269                 fclose(subHandle);
1270                 subHandle = NULL;
1271         }
1272         stopCDDA();
1273         cddaHandle = NULL;
1274
1275         if (compr_img != NULL) {
1276                 free(compr_img->index_table);
1277                 free(compr_img);
1278                 compr_img = NULL;
1279         }
1280
1281         for (i = 1; i <= numtracks; i++) {
1282                 if (ti[i].handle != NULL) {
1283                         fclose(ti[i].handle);
1284                         ti[i].handle = NULL;
1285                 }
1286         }
1287         numtracks = 0;
1288         UnloadSBI();
1289
1290         return 0;
1291 }
1292
1293 static long CALLBACK ISOinit(void) {
1294         assert(cdHandle == NULL);
1295         assert(subHandle == NULL);
1296
1297         return 0; // do nothing
1298 }
1299
1300 static long CALLBACK ISOshutdown(void) {
1301         ISOclose();
1302         return 0;
1303 }
1304
1305 // return Starting and Ending Track
1306 // buffer:
1307 //  byte 0 - start track
1308 //  byte 1 - end track
1309 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1310         buffer[0] = 1;
1311
1312         if (numtracks > 0) {
1313                 buffer[1] = numtracks;
1314         }
1315         else {
1316                 buffer[1] = 1;
1317         }
1318
1319         return 0;
1320 }
1321
1322 // return Track Time
1323 // buffer:
1324 //  byte 0 - frame
1325 //  byte 1 - second
1326 //  byte 2 - minute
1327 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1328         if (track == 0) {
1329                 // CD length according pcsxr-svn (done a bit different here)
1330                 unsigned int sect;
1331                 unsigned char time[3];
1332                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1333                 sec2msf(sect, (char *)time);
1334                 buffer[2] = time[0];
1335                 buffer[1] = time[1];
1336                 buffer[0] = time[2];
1337         }
1338         else if (numtracks > 0 && track <= numtracks) {
1339                 buffer[2] = ti[track].start[0];
1340                 buffer[1] = ti[track].start[1];
1341                 buffer[0] = ti[track].start[2];
1342         }
1343         else {
1344                 buffer[2] = 0;
1345                 buffer[1] = 2;
1346                 buffer[0] = 0;
1347         }
1348
1349         return 0;
1350 }
1351
1352 // decode 'raw' subchannel data ripped by cdrdao
1353 static void DecodeRawSubData(void) {
1354         unsigned char subQData[12];
1355         int i;
1356
1357         memset(subQData, 0, sizeof(subQData));
1358
1359         for (i = 0; i < 8 * 12; i++) {
1360                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1361                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1362                 }
1363         }
1364
1365         memcpy(&subbuffer[12], subQData, 12);
1366 }
1367
1368 // read track
1369 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1370 // uses bcd format
1371 static long CALLBACK ISOreadTrack(unsigned char *time) {
1372         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1373
1374         if (cdHandle == NULL) {
1375                 return -1;
1376         }
1377
1378         if (pregapOffset) {
1379                 subChanMissing = FALSE;
1380                 if (sector >= pregapOffset) {
1381                         sector -= 2 * 75;
1382                         if (sector < pregapOffset)
1383                                 subChanMissing = TRUE;
1384                 }
1385         }
1386
1387         cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1388
1389         if (subHandle != NULL) {
1390                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1391                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1392
1393                 if (subChanRaw) DecodeRawSubData();
1394         }
1395
1396         return 0;
1397 }
1398
1399 // plays cdda audio
1400 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1401 // does NOT uses bcd format
1402 static long CALLBACK ISOplay(unsigned char *time) {
1403         unsigned int i;
1404
1405         if (numtracks <= 1)
1406                 return 0;
1407
1408         // find the track
1409         cdda_cur_sector = msf2sec((char *)time);
1410         for (i = numtracks; i > 1; i--) {
1411                 cdda_first_sector = msf2sec(ti[i].start);
1412                 if (cdda_first_sector <= cdda_cur_sector + 2 * 75)
1413                         break;
1414         }
1415         cdda_file_offset = ti[i].start_offset;
1416
1417         // find the file that contains this track
1418         for (; i > 1; i--)
1419                 if (ti[i].handle != NULL)
1420                         break;
1421
1422         cddaHandle = ti[i].handle;
1423
1424         if (SPU_playCDDAchannel != NULL)
1425                 startCDDA();
1426
1427         return 0;
1428 }
1429
1430 // stops cdda audio
1431 static long CALLBACK ISOstop(void) {
1432         stopCDDA();
1433         return 0;
1434 }
1435
1436 // gets subchannel data
1437 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1438         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1439                 return subbuffer;
1440         }
1441
1442         return NULL;
1443 }
1444
1445 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1446         int sec;
1447
1448         CDR__getStatus(stat);
1449
1450         if (playing) {
1451                 stat->Type = 0x02;
1452                 stat->Status |= 0x80;
1453         }
1454         else {
1455                 stat->Type = 0x01;
1456         }
1457
1458         sec = cdda_cur_sector;
1459         sec2msf(sec, (char *)stat->Time);
1460
1461         return 0;
1462 }
1463
1464 void cdrIsoInit(void) {
1465         CDR_init = ISOinit;
1466         CDR_shutdown = ISOshutdown;
1467         CDR_open = ISOopen;
1468         CDR_close = ISOclose;
1469         CDR_getTN = ISOgetTN;
1470         CDR_getTD = ISOgetTD;
1471         CDR_readTrack = ISOreadTrack;
1472         CDR_getBuffer = ISOgetBuffer;
1473         CDR_play = ISOplay;
1474         CDR_stop = ISOstop;
1475         CDR_getBufferSub = ISOgetBufferSub;
1476         CDR_getStatus = ISOgetStatus;
1477
1478         CDR_getDriveLetter = CDR__getDriveLetter;
1479         CDR_configure = CDR__configure;
1480         CDR_test = CDR__test;
1481         CDR_about = CDR__about;
1482         CDR_setfilename = CDR__setfilename;
1483
1484         numtracks = 0;
1485 }
1486
1487 int cdrIsoActive(void) {
1488         return (cdHandle != NULL);
1489 }