libpcsxcore/cdriso.c

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