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