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 #include <errno.h>
  29 #include <zlib.h>
  30
  31 #ifdef _WIN32
  32 #define WIN32_LEAN_AND_MEAN
  33 #include <process.h>
  34 #include <windows.h>
  35 #define strcasecmp _stricmp
  36 #define usleep(x) (Sleep((x) / 1000))
  37 #else
  38 #include <pthread.h>
  39 #include <sys/time.h>
  40 #include <unistd.h>
  41 #endif
  42
  43 #define OFF_T_MSB ((off_t)1 << (sizeof(off_t) * 8 - 1))
  44
  45 unsigned int cdrIsoMultidiskCount;
  46 unsigned int cdrIsoMultidiskSelect;
  47
  48 static FILE *cdHandle = NULL;
  49 static FILE *cddaHandle = NULL;
  50 static FILE *subHandle = NULL;
  51
  52 static boolean subChanMixed = FALSE;
  53 static boolean subChanRaw = FALSE;
  54 static boolean subChanMissing = FALSE;
  55
  56 static boolean multifile = FALSE;
  57
  58 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
  59 static unsigned char subbuffer[SUB_FRAMESIZE];
  60
  61 static unsigned char sndbuffer[CD_FRAMESIZE_RAW * 10];
  62
  63 #define CDDA_FRAMETIME                  (1000 * (sizeof(sndbuffer) / CD_FRAMESIZE_RAW) / 75)
  64
  65 #ifdef _WIN32
  66 static HANDLE threadid;
  67 #else
  68 static pthread_t threadid;
  69 #endif
  70 static unsigned int initial_offset = 0;
  71 static boolean playing = FALSE;
  72 static boolean cddaBigEndian = FALSE;
  73 // cdda sectors in toc, byte offset in file
  74 static unsigned int cdda_cur_sector;
  75 static unsigned int cdda_first_sector;
  76 static unsigned int cdda_file_offset;
  77 /* Frame offset into CD image where pregap data would be found if it was there.
  78  * If a game seeks there we must *not* return subchannel data since it's
  79  * not in the CD image, so that cdrom code can fake subchannel data instead.
  80  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  81 static unsigned int pregapOffset;
  82
  83 #define cddaCurPos cdda_cur_sector
  84
  85 // compressed image stuff
  86 static struct {
  87         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  88         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  89         off_t *index_table;
  90         unsigned int index_len;
  91         unsigned int block_shift;
  92         unsigned int current_block;
  93         unsigned int sector_in_blk;
  94 } *compr_img;
  95
  96 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
  97
  98 char* CALLBACK CDR__getDriveLetter(void);
  99 long CALLBACK CDR__configure(void);
 100 long CALLBACK CDR__test(void);
 101 void CALLBACK CDR__about(void);
 102 long CALLBACK CDR__setfilename(char *filename);
 103 long CALLBACK CDR__getStatus(struct CdrStat *stat);
 104
 105 static void DecodeRawSubData(void);
 106
 107 struct trackinfo {
 108         enum {DATA=1, CDDA} type;
 109         char start[3];          // MSF-format
 110         char length[3];         // MSF-format
 111         FILE *handle;           // for multi-track images CDDA
 112         unsigned int start_offset; // byte offset from start of above file
 113 };
 114
 115 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 116
 117 static int numtracks = 0;
 118 static struct trackinfo ti[MAXTRACKS];
 119
 120 // get a sector from a msf-array
 121 static unsigned int msf2sec(char *msf) {
 122         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 123 }
 124
 125 static void sec2msf(unsigned int s, char *msf) {
 126         msf[0] = s / 75 / 60;
 127         s = s - msf[0] * 75 * 60;
 128         msf[1] = s / 75;
 129         s = s - msf[1] * 75;
 130         msf[2] = s;
 131 }
 132
 133 // divide a string of xx:yy:zz into m, s, f
 134 static void tok2msf(char *time, char *msf) {
 135         char *token;
 136
 137         token = strtok(time, ":");
 138         if (token) {
 139                 msf[0] = atoi(token);
 140         }
 141         else {
 142                 msf[0] = 0;
 143         }
 144
 145         token = strtok(NULL, ":");
 146         if (token) {
 147                 msf[1] = atoi(token);
 148         }
 149         else {
 150                 msf[1] = 0;
 151         }
 152
 153         token = strtok(NULL, ":");
 154         if (token) {
 155                 msf[2] = atoi(token);
 156         }
 157         else {
 158                 msf[2] = 0;
 159         }
 160 }
 161
 162 #ifndef _WIN32
 163 static long GetTickCount(void) {
 164         static time_t           initial_time = 0;
 165         struct timeval          now;
 166
 167         gettimeofday(&now, NULL);
 168
 169         if (initial_time == 0) {
 170                 initial_time = now.tv_sec;
 171         }
 172
 173         return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
 174 }
 175 #endif
 176
 177 // this thread plays audio data
 178 #ifdef _WIN32
 179 static void playthread(void *param)
 180 #else
 181 static void *playthread(void *param)
 182 #endif
 183 {
 184         long osleep, d, t, i, s;
 185         unsigned char   tmp;
 186         int ret = 0, sector_offs;
 187
 188         t = GetTickCount();
 189
 190         while (playing) {
 191                 s = 0;
 192                 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
 193                         sector_offs = cdda_cur_sector - cdda_first_sector;
 194                         if (sector_offs < 0) {
 195                                 d = CD_FRAMESIZE_RAW;
 196                                 memset(sndbuffer + s, 0, d);
 197                         }
 198                         else {
 199                                 d = cdimg_read_func(cddaHandle, cdda_file_offset,
 200                                         sndbuffer + s, sector_offs);
 201                                 if (d < CD_FRAMESIZE_RAW)
 202                                         break;
 203                         }
 204
 205                         s += d;
 206                         cdda_cur_sector++;
 207                 }
 208
 209                 if (s == 0) {
 210                         playing = FALSE;
 211                         initial_offset = 0;
 212                         break;
 213                 }
 214
 215                 if (!cdr.Muted && playing) {
 216                         if (cddaBigEndian) {
 217                                 for (i = 0; i < s / 2; i++) {
 218                                         tmp = sndbuffer[i * 2];
 219                                         sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
 220                                         sndbuffer[i * 2 + 1] = tmp;
 221                                 }
 222                         }
 223
 224                         // can't do it yet due to readahead..
 225                         //cdrAttenuate((short *)sndbuffer, s / 4, 1);
 226                         do {
 227                                 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
 228                                 if (ret == 0x7761)
 229             {
 230                                         usleep(6 * 1000);
 231             }
 232                         } while (ret == 0x7761 && playing); // rearmed_wait
 233                 }
 234
 235                 if (ret != 0x676f) { // !rearmed_go
 236                         // do approx sleep
 237                         long now;
 238
 239                         // HACK: stop feeding data while emu is paused
 240                         extern int stop;
 241                         while (stop && playing)
 242          {
 243                                 usleep(10000);
 244          }
 245
 246                         now = GetTickCount();
 247                         osleep = t - now;
 248                         if (osleep <= 0) {
 249                                 osleep = 1;
 250                                 t = now;
 251                         }
 252                         else if (osleep > CDDA_FRAMETIME) {
 253                                 osleep = CDDA_FRAMETIME;
 254                                 t = now;
 255                         }
 256
 257                         usleep(osleep * 1000);
 258                         t += CDDA_FRAMETIME;
 259                 }
 260
 261         }
 262
 263 #ifdef _WIN32
 264         _endthread();
 265 #else
 266         pthread_exit(0);
 267         return NULL;
 268 #endif
 269 }
 270
 271 // stop the CDDA playback
 272 static void stopCDDA() {
 273         if (!playing) {
 274                 return;
 275         }
 276
 277         playing = FALSE;
 278 #ifdef _WIN32
 279         WaitForSingleObject(threadid, INFINITE);
 280 #else
 281         pthread_join(threadid, NULL);
 282 #endif
 283 }
 284
 285 // start the CDDA playback
 286 static void startCDDA(void) {
 287         if (playing) {
 288                 stopCDDA();
 289         }
 290
 291         playing = TRUE;
 292
 293 #ifdef _WIN32
 294         threadid = (HANDLE)_beginthread(playthread, 0, NULL);
 295 #else
 296         pthread_create(&threadid, NULL, playthread, NULL);
 297 #endif
 298 }
 299
 300 // this function tries to get the .toc file of the given .bin
 301 // the necessary data is put into the ti (trackinformation)-array
 302 static int parsetoc(const char *isofile) {
 303         char                    tocname[MAXPATHLEN];
 304         FILE                    *fi;
 305         char                    linebuf[256], tmp[256], name[256];
 306         char                    *token;
 307         char                    time[20], time2[20];
 308         unsigned int    t, sector_offs, sector_size;
 309         unsigned int    current_zero_gap = 0;
 310
 311         numtracks = 0;
 312
 313         // copy name of the iso and change extension from .bin to .toc
 314         strncpy(tocname, isofile, sizeof(tocname));
 315         tocname[MAXPATHLEN - 1] = '\0';
 316         if (strlen(tocname) >= 4) {
 317                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 318         }
 319         else {
 320                 return -1;
 321         }
 322
 323         if ((fi = fopen(tocname, "r")) == NULL) {
 324                 // try changing extension to .cue (to satisfy some stupid tutorials)
 325                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 326                 if ((fi = fopen(tocname, "r")) == NULL) {
 327                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 328                         strcpy(tocname, isofile);
 329                         t = strlen(tocname);
 330                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 331                                 tocname[t - 4] = '\0';
 332                                 if ((fi = fopen(tocname, "r")) == NULL) {
 333                                         return -1;
 334                                 }
 335                         }
 336                         else {
 337                                 return -1;
 338                         }
 339                 }
 340                 // check if it's really a TOC named as a .cue
 341                 fgets(linebuf, sizeof(linebuf), fi);
 342                 token = strtok(linebuf, " ");
 343                 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 344                         fclose(fi);
 345                         return -1;
 346                 }
 347                 fseek(fi, 0, SEEK_SET);
 348         }
 349
 350         memset(&ti, 0, sizeof(ti));
 351         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 352
 353         sector_size = CD_FRAMESIZE_RAW;
 354         sector_offs = 2 * 75;
 355
 356         // parse the .toc file
 357         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 358                 // search for tracks
 359                 strncpy(tmp, linebuf, sizeof(linebuf));
 360                 token = strtok(tmp, " ");
 361
 362                 if (token == NULL) continue;
 363
 364                 if (!strcmp(token, "TRACK")) {
 365                         sector_offs += current_zero_gap;
 366                         current_zero_gap = 0;
 367
 368                         // get type of track
 369                         token = strtok(NULL, " ");
 370                         numtracks++;
 371
 372                         if (!strncmp(token, "MODE2_RAW", 9)) {
 373                                 ti[numtracks].type = DATA;
 374                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 375
 376                                 // check if this image contains mixed subchannel data
 377                                 token = strtok(NULL, " ");
 378                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 379                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 380                                         subChanMixed = TRUE;
 381                                         if (!strncmp(token, "RW_RAW", 6))
 382                                                 subChanRaw = TRUE;
 383                                 }
 384                         }
 385                         else if (!strncmp(token, "AUDIO", 5)) {
 386                                 ti[numtracks].type = CDDA;
 387                         }
 388                 }
 389                 else if (!strcmp(token, "DATAFILE")) {
 390                         if (ti[numtracks].type == CDDA) {
 391                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 392                                 ti[numtracks].start_offset = t;
 393                                 t = t / sector_size + sector_offs;
 394                                 sec2msf(t, (char *)&ti[numtracks].start);
 395                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 396                         }
 397                         else {
 398                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 399                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 400                         }
 401                 }
 402                 else if (!strcmp(token, "FILE")) {
 403                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 404                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 405                         t += msf2sec(ti[numtracks].start) * sector_size;
 406                         ti[numtracks].start_offset = t;
 407                         t = t / sector_size + sector_offs;
 408                         sec2msf(t, (char *)&ti[numtracks].start);
 409                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 410                 }
 411                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 412                         // skip unneeded optional fields
 413                         while (token != NULL) {
 414                                 token = strtok(NULL, " ");
 415                                 if (strchr(token, ':') != NULL)
 416                                         break;
 417                         }
 418                         if (token != NULL) {
 419                                 tok2msf(token, tmp);
 420                                 current_zero_gap = msf2sec(tmp);
 421                         }
 422                         if (numtracks > 1) {
 423                                 t = ti[numtracks - 1].start_offset;
 424                                 t /= sector_size;
 425                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 426                         }
 427                 }
 428                 else if (!strcmp(token, "START")) {
 429                         token = strtok(NULL, " ");
 430                         if (token != NULL && strchr(token, ':')) {
 431                                 tok2msf(token, tmp);
 432                                 t = msf2sec(tmp);
 433                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 434                                 t = msf2sec(ti[numtracks].start) + t;
 435                                 sec2msf(t, (char *)&ti[numtracks].start);
 436                         }
 437                 }
 438         }
 439
 440         fclose(fi);
 441
 442         return 0;
 443 }
 444
 445 // this function tries to get the .cue file of the given .bin
 446 // the necessary data is put into the ti (trackinformation)-array
 447 static int parsecue(const char *isofile) {
 448         char                    cuename[MAXPATHLEN];
 449         char                    filepath[MAXPATHLEN];
 450         char                    *incue_fname;
 451         FILE                    *fi;
 452         char                    *token;
 453         char                    time[20];
 454         char                    *tmp;
 455         char                    linebuf[256], tmpb[256], dummy[256];
 456         unsigned int    incue_max_len;
 457         unsigned int    t, file_len, mode, sector_offs;
 458         unsigned int    sector_size = 2352;
 459
 460         numtracks = 0;
 461
 462         // copy name of the iso and change extension from .bin to .cue
 463         strncpy(cuename, isofile, sizeof(cuename));
 464         cuename[MAXPATHLEN - 1] = '\0';
 465         if (strlen(cuename) >= 4) {
 466                 strcpy(cuename + strlen(cuename) - 4, ".cue");
 467         }
 468         else {
 469                 return -1;
 470         }
 471
 472         if ((fi = fopen(cuename, "r")) == NULL) {
 473                 return -1;
 474         }
 475
 476         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 477         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 478         // that...
 479         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 480                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 481                         // Don't proceed further, as this is actually a .toc file rather
 482                         // than a .cue file.
 483                         fclose(fi);
 484                         return parsetoc(isofile);
 485                 }
 486                 fseek(fi, 0, SEEK_SET);
 487         }
 488
 489         // build a path for files referenced in .cue
 490         strncpy(filepath, cuename, sizeof(filepath));
 491         tmp = strrchr(filepath, '/');
 492         if (tmp == NULL)
 493                 tmp = strrchr(filepath, '\\');
 494         if (tmp != NULL)
 495                 tmp++;
 496         else
 497                 tmp = filepath;
 498         *tmp = 0;
 499         filepath[sizeof(filepath) - 1] = 0;
 500         incue_fname = tmp;
 501         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 502
 503         memset(&ti, 0, sizeof(ti));
 504
 505         file_len = 0;
 506         sector_offs = 2 * 75;
 507
 508         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 509                 strncpy(dummy, linebuf, sizeof(linebuf));
 510                 token = strtok(dummy, " ");
 511
 512                 if (token == NULL) {
 513                         continue;
 514                 }
 515
 516                 if (!strcmp(token, "TRACK")) {
 517                         numtracks++;
 518
 519                         sector_size = 0;
 520                         if (strstr(linebuf, "AUDIO") != NULL) {
 521                                 ti[numtracks].type = CDDA;
 522                                 sector_size = 2352;
 523                         }
 524                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 525                                 ti[numtracks].type = DATA;
 526                         else {
 527                                 SysPrintf(".cue: failed to parse TRACK\n");
 528                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 529                         }
 530                         if (sector_size == 0)
 531                                 sector_size = 2352;
 532                 }
 533                 else if (!strcmp(token, "INDEX")) {
 534                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 535                                 SysPrintf(".cue: failed to parse INDEX\n");
 536                         tok2msf(time, (char *)&ti[numtracks].start);
 537
 538                         t = msf2sec(ti[numtracks].start);
 539                         ti[numtracks].start_offset = t * sector_size;
 540                         t += sector_offs;
 541                         sec2msf(t, ti[numtracks].start);
 542
 543                         // default track length to file length
 544                         t = file_len - ti[numtracks].start_offset / sector_size;
 545                         sec2msf(t, ti[numtracks].length);
 546
 547                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 548                                 // this track uses the same file as the last,
 549                                 // start of this track is last track's end
 550                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 551                                 sec2msf(t, ti[numtracks - 1].length);
 552                         }
 553                         if (numtracks > 1 && pregapOffset == -1)
 554                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 555                 }
 556                 else if (!strcmp(token, "PREGAP")) {
 557                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 558                                 tok2msf(time, dummy);
 559                                 sector_offs += msf2sec(dummy);
 560                         }
 561                         pregapOffset = -1; // mark to fill track start_offset
 562                 }
 563                 else if (!strcmp(token, "FILE")) {
 564                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 565                         if (t != 1)
 566                                 sscanf(linebuf, " FILE %255s", tmpb);
 567
 568                         tmp = strrchr(tmpb, '\\');
 569                         if (tmp == NULL)
 570                                 tmp = strrchr(tmpb, '/');
 571                         if (tmp != NULL)
 572                                 tmp++;
 573                         else
 574                                 tmp = tmpb;
 575                         strncpy(incue_fname, tmp, incue_max_len);
 576                         ti[numtracks + 1].handle = fopen(filepath, "rb");
 577
 578                         // update global offset if this is not first file in this .cue
 579                         if (numtracks + 1 > 1) {
 580                                 multifile = 1;
 581                                 sector_offs += file_len;
 582                         }
 583
 584                         file_len = 0;
 585                         if (ti[numtracks + 1].handle == NULL) {
 586                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 587                                 continue;
 588                         }
 589                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 590                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 591
 592                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 593                                 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
 594                         {
 595                                 // user selected .cue as image file, use it's data track instead
 596                                 fclose(cdHandle);
 597                                 cdHandle = fopen(filepath, "rb");
 598                         }
 599                 }
 600         }
 601
 602         fclose(fi);
 603
 604         return 0;
 605 }
 606
 607 // this function tries to get the .ccd file of the given .img
 608 // the necessary data is put into the ti (trackinformation)-array
 609 static int parseccd(const char *isofile) {
 610         char                    ccdname[MAXPATHLEN];
 611         FILE                    *fi;
 612         char                    linebuf[256];
 613         unsigned int    t;
 614
 615         numtracks = 0;
 616
 617         // copy name of the iso and change extension from .img to .ccd
 618         strncpy(ccdname, isofile, sizeof(ccdname));
 619         ccdname[MAXPATHLEN - 1] = '\0';
 620         if (strlen(ccdname) >= 4) {
 621                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 622         }
 623         else {
 624                 return -1;
 625         }
 626
 627         if ((fi = fopen(ccdname, "r")) == NULL) {
 628                 return -1;
 629         }
 630
 631         memset(&ti, 0, sizeof(ti));
 632
 633         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 634                 if (!strncmp(linebuf, "[TRACK", 6)){
 635                         numtracks++;
 636                 }
 637                 else if (!strncmp(linebuf, "MODE=", 5)) {
 638                         sscanf(linebuf, "MODE=%d", &t);
 639                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 640                 }
 641                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 642                         sscanf(linebuf, "INDEX 1=%d", &t);
 643                         sec2msf(t + 2 * 75, ti[numtracks].start);
 644                         ti[numtracks].start_offset = t * 2352;
 645
 646                         // If we've already seen another track, this is its end
 647                         if (numtracks > 1) {
 648                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 649                                 sec2msf(t, ti[numtracks - 1].length);
 650                         }
 651                 }
 652         }
 653
 654         fclose(fi);
 655
 656         // Fill out the last track's end based on size
 657         if (numtracks >= 1) {
 658                 fseek(cdHandle, 0, SEEK_END);
 659                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 660                 sec2msf(t, ti[numtracks].length);
 661         }
 662
 663         return 0;
 664 }
 665
 666 // this function tries to get the .mds file of the given .mdf
 667 // the necessary data is put into the ti (trackinformation)-array
 668 static int parsemds(const char *isofile) {
 669         char                    mdsname[MAXPATHLEN];
 670         FILE                    *fi;
 671         unsigned int    offset, extra_offset, l, i;
 672         unsigned short  s;
 673
 674         numtracks = 0;
 675
 676         // copy name of the iso and change extension from .mdf to .mds
 677         strncpy(mdsname, isofile, sizeof(mdsname));
 678         mdsname[MAXPATHLEN - 1] = '\0';
 679         if (strlen(mdsname) >= 4) {
 680                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 681         }
 682         else {
 683                 return -1;
 684         }
 685
 686         if ((fi = fopen(mdsname, "rb")) == NULL) {
 687                 return -1;
 688         }
 689
 690         memset(&ti, 0, sizeof(ti));
 691
 692         // check if it's a valid mds file
 693         fread(&i, 1, sizeof(unsigned int), fi);
 694         i = SWAP32(i);
 695         if (i != 0x4944454D) {
 696                 // not an valid mds file
 697                 fclose(fi);
 698                 return -1;
 699         }
 700
 701         // get offset to session block
 702         fseek(fi, 0x50, SEEK_SET);
 703         fread(&offset, 1, sizeof(unsigned int), fi);
 704         offset = SWAP32(offset);
 705
 706         // get total number of tracks
 707         offset += 14;
 708         fseek(fi, offset, SEEK_SET);
 709         fread(&s, 1, sizeof(unsigned short), fi);
 710         s = SWAP16(s);
 711         numtracks = s;
 712
 713         // get offset to track blocks
 714         fseek(fi, 4, SEEK_CUR);
 715         fread(&offset, 1, sizeof(unsigned int), fi);
 716         offset = SWAP32(offset);
 717
 718         // skip lead-in data
 719         while (1) {
 720                 fseek(fi, offset + 4, SEEK_SET);
 721                 if (fgetc(fi) < 0xA0) {
 722                         break;
 723                 }
 724                 offset += 0x50;
 725         }
 726
 727         // check if the image contains mixed subchannel data
 728         fseek(fi, offset + 1, SEEK_SET);
 729         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 730
 731         // read track data
 732         for (i = 1; i <= numtracks; i++) {
 733                 fseek(fi, offset, SEEK_SET);
 734
 735                 // get the track type
 736                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 737                 fseek(fi, 8, SEEK_CUR);
 738
 739                 // get the track starting point
 740                 ti[i].start[0] = fgetc(fi);
 741                 ti[i].start[1] = fgetc(fi);
 742                 ti[i].start[2] = fgetc(fi);
 743
 744                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 745                 extra_offset = SWAP32(extra_offset);
 746
 747                 // get track start offset (in .mdf)
 748                 fseek(fi, offset + 0x28, SEEK_SET);
 749                 fread(&l, 1, sizeof(unsigned int), fi);
 750                 l = SWAP32(l);
 751                 ti[i].start_offset = l;
 752
 753                 // get pregap
 754                 fseek(fi, extra_offset, SEEK_SET);
 755                 fread(&l, 1, sizeof(unsigned int), fi);
 756                 l = SWAP32(l);
 757                 if (l != 0 && i > 1)
 758                         pregapOffset = msf2sec(ti[i].start);
 759
 760                 // get the track length
 761                 fread(&l, 1, sizeof(unsigned int), fi);
 762                 l = SWAP32(l);
 763                 sec2msf(l, ti[i].length);
 764
 765                 offset += 0x50;
 766         }
 767
 768         fclose(fi);
 769         return 0;
 770 }
 771
 772 static int handlepbp(const char *isofile) {
 773         struct {
 774                 unsigned int sig;
 775                 unsigned int dontcare[8];
 776                 unsigned int psar_offs;
 777         } pbp_hdr;
 778         struct {
 779                 unsigned char type;
 780                 unsigned char pad0;
 781                 unsigned char track;
 782                 char index0[3];
 783                 char pad1;
 784                 char index1[3];
 785         } toc_entry;
 786         struct {
 787                 unsigned int offset;
 788                 unsigned int size;
 789                 unsigned int dontcare[6];
 790         } index_entry;
 791         char psar_sig[11];
 792         off_t psisoimg_offs, cdimg_base;
 793         unsigned int t, cd_length;
 794         unsigned int offsettab[8];
 795         const char *ext = NULL;
 796         int i, ret;
 797
 798         if (strlen(isofile) >= 4)
 799                 ext = isofile + strlen(isofile) - 4;
 800         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 801                 return -1;
 802
 803         fseeko(cdHandle, 0, SEEK_SET);
 804
 805         numtracks = 0;
 806
 807         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 808         if (ret != sizeof(pbp_hdr)) {
 809                 SysPrintf("failed to read pbp\n");
 810                 goto fail_io;
 811         }
 812
 813         ret = fseeko(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 814         if (ret != 0) {
 815                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 816                 goto fail_io;
 817         }
 818
 819         psisoimg_offs = pbp_hdr.psar_offs;
 820         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 821         psar_sig[10] = 0;
 822         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 823                 // multidisk image?
 824                 ret = fseeko(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 825                 if (ret != 0) {
 826                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 827                         goto fail_io;
 828                 }
 829
 830                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 831                         SysPrintf("failed to read offsettab\n");
 832                         goto fail_io;
 833                 }
 834
 835                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 836                         if (offsettab[i] == 0)
 837                                 break;
 838                 }
 839                 cdrIsoMultidiskCount = i;
 840                 if (cdrIsoMultidiskCount == 0) {
 841                         SysPrintf("multidisk eboot has 0 images?\n");
 842                         goto fail_io;
 843                 }
 844
 845                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 846                         cdrIsoMultidiskSelect = 0;
 847
 848                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 849
 850                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 851                 if (ret != 0) {
 852                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 853                         goto fail_io;
 854                 }
 855
 856                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 857                 psar_sig[10] = 0;
 858         }
 859
 860         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 861                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 862                 goto fail_io;
 863         }
 864
 865         // seek to TOC
 866         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 867         if (ret != 0) {
 868                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 869                 goto fail_io;
 870         }
 871
 872         // first 3 entries are special
 873         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 874         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 875         numtracks = btoi(toc_entry.index1[0]);
 876
 877         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 878         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 879                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 880
 881         for (i = 1; i <= numtracks; i++) {
 882                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 883
 884                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 885
 886                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 887                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 888                 ti[i].start_offset *= 2352;
 889                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 890                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 891                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 892
 893                 if (i > 1) {
 894                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 895                         sec2msf(t, ti[i - 1].length);
 896                 }
 897         }
 898         t = cd_length - ti[numtracks].start_offset / 2352;
 899         sec2msf(t, ti[numtracks].length);
 900
 901         // seek to ISO index
 902         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 903         if (ret != 0) {
 904                 SysPrintf("failed to seek to ISO index\n");
 905                 goto fail_io;
 906         }
 907
 908         compr_img = calloc(1, sizeof(*compr_img));
 909         if (compr_img == NULL)
 910                 goto fail_io;
 911
 912         compr_img->block_shift = 4;
 913         compr_img->current_block = (unsigned int)-1;
 914
 915         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 916         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 917         if (compr_img->index_table == NULL)
 918                 goto fail_io;
 919
 920         cdimg_base = psisoimg_offs + 0x100000;
 921         for (i = 0; i < compr_img->index_len; i++) {
 922                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 923                 if (ret != sizeof(index_entry)) {
 924                         SysPrintf("failed to read index_entry #%d\n", i);
 925                         goto fail_index;
 926                 }
 927
 928                 if (index_entry.size == 0)
 929                         break;
 930
 931                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 932         }
 933         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 934
 935         return 0;
 936
 937 fail_index:
 938         free(compr_img->index_table);
 939         compr_img->index_table = NULL;
 940 fail_io:
 941         if (compr_img != NULL) {
 942                 free(compr_img);
 943                 compr_img = NULL;
 944         }
 945         return -1;
 946 }
 947
 948 static int handlecbin(const char *isofile) {
 949         struct
 950         {
 951                 char magic[4];
 952                 unsigned int header_size;
 953                 unsigned long long total_bytes;
 954                 unsigned int block_size;
 955                 unsigned char ver;              // 1
 956                 unsigned char align;
 957                 unsigned char rsv_06[2];
 958         } ciso_hdr;
 959         const char *ext = NULL;
 960         unsigned int *index_table = NULL;
 961         unsigned int index = 0, plain;
 962         int i, ret;
 963
 964         if (strlen(isofile) >= 5)
 965                 ext = isofile + strlen(isofile) - 5;
 966         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 967                 return -1;
 968
 969         fseek(cdHandle, 0, SEEK_SET);
 970
 971         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 972         if (ret != sizeof(ciso_hdr)) {
 973                 SysPrintf("failed to read ciso header\n");
 974                 return -1;
 975         }
 976
 977         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 978                 SysPrintf("bad ciso header\n");
 979                 return -1;
 980         }
 981         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 982                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
 983                 if (ret != 0) {
 984                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 985                         return -1;
 986                 }
 987         }
 988
 989         compr_img = calloc(1, sizeof(*compr_img));
 990         if (compr_img == NULL)
 991                 goto fail_io;
 992
 993         compr_img->block_shift = 0;
 994         compr_img->current_block = (unsigned int)-1;
 995
 996         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
 997         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
 998         if (index_table == NULL)
 999                 goto fail_io;
1000
1001         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
1002         if (ret != compr_img->index_len) {
1003                 SysPrintf("failed to read index table\n");
1004                 goto fail_index;
1005         }
1006
1007         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
1008         if (compr_img->index_table == NULL)
1009                 goto fail_index;
1010
1011         for (i = 0; i < compr_img->index_len + 1; i++) {
1012                 index = index_table[i];
1013                 plain = index & 0x80000000;
1014                 index &= 0x7fffffff;
1015                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
1016                 if (plain)
1017                         compr_img->index_table[i] |= OFF_T_MSB;
1018         }
1019
1020         return 0;
1021
1022 fail_index:
1023         free(index_table);
1024 fail_io:
1025         if (compr_img != NULL) {
1026                 free(compr_img);
1027                 compr_img = NULL;
1028         }
1029         return -1;
1030 }
1031
1032 // this function tries to get the .sub file of the given .img
1033 static int opensubfile(const char *isoname) {
1034         char            subname[MAXPATHLEN];
1035
1036         // copy name of the iso and change extension from .img to .sub
1037         strncpy(subname, isoname, sizeof(subname));
1038         subname[MAXPATHLEN - 1] = '\0';
1039         if (strlen(subname) >= 4) {
1040                 strcpy(subname + strlen(subname) - 4, ".sub");
1041         }
1042         else {
1043                 return -1;
1044         }
1045
1046         subHandle = fopen(subname, "rb");
1047         if (subHandle == NULL) {
1048                 return -1;
1049         }
1050
1051         return 0;
1052 }
1053
1054 static int opensbifile(const char *isoname) {
1055         char            sbiname[MAXPATHLEN];
1056         int             s;
1057
1058         strncpy(sbiname, isoname, sizeof(sbiname));
1059         sbiname[MAXPATHLEN - 1] = '\0';
1060         if (strlen(sbiname) >= 4) {
1061                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1062         }
1063         else {
1064                 return -1;
1065         }
1066
1067         fseek(cdHandle, 0, SEEK_END);
1068         s = ftell(cdHandle) / 2352;
1069
1070         return LoadSBI(sbiname, s);
1071 }
1072
1073 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1074 {
1075         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1076         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1077 }
1078
1079 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1080 {
1081         int ret;
1082
1083         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1084         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1085         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1086
1087         if (subChanRaw) DecodeRawSubData();
1088
1089         return ret;
1090 }
1091
1092 static int uncomp2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1093 {
1094         static z_stream z;
1095         int ret = 0;
1096
1097         if (z.zalloc == NULL) {
1098                 // XXX: one-time leak here..
1099                 z.next_in = Z_NULL;
1100                 z.avail_in = 0;
1101                 z.zalloc = Z_NULL;
1102                 z.zfree = Z_NULL;
1103                 z.opaque = Z_NULL;
1104                 ret = inflateInit2(&z, -15);
1105         }
1106         else
1107                 ret = inflateReset(&z);
1108         if (ret != Z_OK)
1109                 return ret;
1110
1111         z.next_in = in;
1112         z.avail_in = in_size;
1113         z.next_out = out;
1114         z.avail_out = *out_size;
1115
1116         ret = inflate(&z, Z_NO_FLUSH);
1117         //inflateEnd(&z);
1118
1119         *out_size -= z.avail_out;
1120         return ret == 1 ? 0 : ret;
1121 }
1122
1123 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1124 {
1125         unsigned long cdbuffer_size, cdbuffer_size_expect;
1126         unsigned int size;
1127         int is_compressed;
1128         off_t start_byte;
1129         int ret, block;
1130
1131         if (base)
1132                 sector += base / 2352;
1133
1134         block = sector >> compr_img->block_shift;
1135         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1136
1137         if (block == compr_img->current_block) {
1138                 //printf("hit sect %d\n", sector);
1139                 goto finish;
1140         }
1141
1142         if (sector >= compr_img->index_len * 16) {
1143                 SysPrintf("sector %d is past img end\n", sector);
1144                 return -1;
1145         }
1146
1147         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1148         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1149                 SysPrintf("seek error for block %d at %llx: ",
1150                         block, (long long)start_byte);
1151                 perror(NULL);
1152                 return -1;
1153         }
1154
1155         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1156         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1157         if (size > sizeof(compr_img->buff_compressed)) {
1158                 SysPrintf("block %d is too large: %u\n", block, size);
1159                 return -1;
1160         }
1161
1162         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1163                                 1, size, cdHandle) != size) {
1164                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1165                 perror(NULL);
1166                 return -1;
1167         }
1168
1169         if (is_compressed) {
1170                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1171                 cdbuffer_size = cdbuffer_size_expect;
1172                 ret = uncomp2(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1173                 if (ret != 0) {
1174                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1175                                         ret, block, sector);
1176                         return -1;
1177                 }
1178                 if (cdbuffer_size != cdbuffer_size_expect)
1179                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1180                                         cdbuffer_size_expect, sector);
1181         }
1182
1183         // done at last!
1184         compr_img->current_block = block;
1185
1186 finish:
1187         if (dest != cdbuffer) // copy avoid HACK
1188                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1189                         CD_FRAMESIZE_RAW);
1190         return CD_FRAMESIZE_RAW;
1191 }
1192
1193 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1194 {
1195         int ret;
1196
1197         fseek(f, base + sector * 2048, SEEK_SET);
1198         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1199
1200         // not really necessary, fake mode 2 header
1201         memset(cdbuffer, 0, 12 * 2);
1202         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1203         cdbuffer[12 + 3] = 1;
1204
1205         return ret;
1206 }
1207
1208 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1209         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1210 }
1211
1212 static unsigned char * CALLBACK ISOgetBuffer(void) {
1213         return cdbuffer + 12;
1214 }
1215
1216 static void PrintTracks(void) {
1217         int i;
1218
1219         for (i = 1; i <= numtracks; i++) {
1220                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1221                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1222                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1223                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1224         }
1225 }
1226
1227 // This function is invoked by the front-end when opening an ISO
1228 // file for playback
1229 static long CALLBACK ISOopen(void) {
1230         boolean isMode1ISO = FALSE;
1231         char alt_bin_filename[MAXPATHLEN];
1232         const char *bin_filename;
1233
1234         if (cdHandle != NULL) {
1235                 return 0; // it's already open
1236         }
1237
1238         cdHandle = fopen(GetIsoFile(), "rb");
1239         if (cdHandle == NULL) {
1240                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1241                         GetIsoFile(), strerror(errno));
1242                 return -1;
1243         }
1244
1245         SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1246
1247         cddaBigEndian = FALSE;
1248         subChanMixed = FALSE;
1249         subChanRaw = FALSE;
1250         pregapOffset = 0;
1251         cdrIsoMultidiskCount = 1;
1252         multifile = 0;
1253
1254         CDR_getBuffer = ISOgetBuffer;
1255         cdimg_read_func = cdread_normal;
1256
1257         if (parsetoc(GetIsoFile()) == 0) {
1258                 SysPrintf("[+toc]");
1259         }
1260         else if (parseccd(GetIsoFile()) == 0) {
1261                 SysPrintf("[+ccd]");
1262         }
1263         else if (parsemds(GetIsoFile()) == 0) {
1264                 SysPrintf("[+mds]");
1265         }
1266         else if (parsecue(GetIsoFile()) == 0) {
1267                 SysPrintf("[+cue]");
1268         }
1269         if (handlepbp(GetIsoFile()) == 0) {
1270                 SysPrintf("[pbp]");
1271                 CDR_getBuffer = ISOgetBuffer_compr;
1272                 cdimg_read_func = cdread_compressed;
1273         }
1274         else if (handlecbin(GetIsoFile()) == 0) {
1275                 SysPrintf("[cbin]");
1276                 CDR_getBuffer = ISOgetBuffer_compr;
1277                 cdimg_read_func = cdread_compressed;
1278         }
1279
1280         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1281                 SysPrintf("[+sub]");
1282         }
1283         if (opensbifile(GetIsoFile()) == 0) {
1284                 SysPrintf("[+sbi]");
1285         }
1286
1287         fseeko(cdHandle, 0, SEEK_END);
1288
1289         // maybe user selected metadata file instead of main .bin ..
1290         bin_filename = GetIsoFile();
1291         if (ftello(cdHandle) < 2352 * 0x10) {
1292                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1293                 FILE *tmpf = NULL;
1294                 size_t i;
1295                 char *p;
1296
1297                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1298                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1299                 if (strlen(alt_bin_filename) >= 4) {
1300                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1301                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1302                                 strcpy(p, exts[i]);
1303                                 tmpf = fopen(alt_bin_filename, "rb");
1304                                 if (tmpf != NULL)
1305                                         break;
1306                         }
1307                 }
1308                 if (tmpf != NULL) {
1309                         bin_filename = alt_bin_filename;
1310                         fclose(cdHandle);
1311                         cdHandle = tmpf;
1312                         fseeko(cdHandle, 0, SEEK_END);
1313                 }
1314         }
1315
1316         // guess whether it is mode1/2048
1317         if (ftello(cdHandle) % 2048 == 0) {
1318                 unsigned int modeTest = 0;
1319                 fseek(cdHandle, 0, SEEK_SET);
1320                 fread(&modeTest, 4, 1, cdHandle);
1321                 if (SWAP32(modeTest) != 0xffffff00) {
1322                         SysPrintf("[2048]");
1323                         isMode1ISO = TRUE;
1324                 }
1325         }
1326         fseek(cdHandle, 0, SEEK_SET);
1327
1328         SysPrintf(".\n");
1329
1330         PrintTracks();
1331
1332         if (subChanMixed)
1333                 cdimg_read_func = cdread_sub_mixed;
1334         else if (isMode1ISO)
1335                 cdimg_read_func = cdread_2048;
1336
1337         // make sure we have another handle open for cdda
1338         if (numtracks > 1 && ti[1].handle == NULL) {
1339                 ti[1].handle = fopen(bin_filename, "rb");
1340         }
1341         cdda_cur_sector = 0;
1342         cdda_file_offset = 0;
1343
1344         return 0;
1345 }
1346
1347 static long CALLBACK ISOclose(void) {
1348         int i;
1349
1350         if (cdHandle != NULL) {
1351                 fclose(cdHandle);
1352                 cdHandle = NULL;
1353         }
1354         if (subHandle != NULL) {
1355                 fclose(subHandle);
1356                 subHandle = NULL;
1357         }
1358         stopCDDA();
1359         cddaHandle = NULL;
1360
1361         if (compr_img != NULL) {
1362                 free(compr_img->index_table);
1363                 free(compr_img);
1364                 compr_img = NULL;
1365         }
1366
1367         for (i = 1; i <= numtracks; i++) {
1368                 if (ti[i].handle != NULL) {
1369                         fclose(ti[i].handle);
1370                         ti[i].handle = NULL;
1371                 }
1372         }
1373         numtracks = 0;
1374         ti[1].type = 0;
1375         UnloadSBI();
1376
1377         memset(cdbuffer, 0, sizeof(cdbuffer));
1378         CDR_getBuffer = ISOgetBuffer;
1379
1380         return 0;
1381 }
1382
1383 static long CALLBACK ISOinit(void) {
1384         assert(cdHandle == NULL);
1385         assert(subHandle == NULL);
1386
1387         return 0; // do nothing
1388 }
1389
1390 static long CALLBACK ISOshutdown(void) {
1391         ISOclose();
1392         return 0;
1393 }
1394
1395 // return Starting and Ending Track
1396 // buffer:
1397 //  byte 0 - start track
1398 //  byte 1 - end track
1399 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1400         buffer[0] = 1;
1401
1402         if (numtracks > 0) {
1403                 buffer[1] = numtracks;
1404         }
1405         else {
1406                 buffer[1] = 1;
1407         }
1408
1409         return 0;
1410 }
1411
1412 // return Track Time
1413 // buffer:
1414 //  byte 0 - frame
1415 //  byte 1 - second
1416 //  byte 2 - minute
1417 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1418         if (track == 0) {
1419                 unsigned int sect;
1420                 unsigned char time[3];
1421                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1422                 sec2msf(sect, (char *)time);
1423                 buffer[2] = time[0];
1424                 buffer[1] = time[1];
1425                 buffer[0] = time[2];
1426         }
1427         else if (numtracks > 0 && track <= numtracks) {
1428                 buffer[2] = ti[track].start[0];
1429                 buffer[1] = ti[track].start[1];
1430                 buffer[0] = ti[track].start[2];
1431         }
1432         else {
1433                 buffer[2] = 0;
1434                 buffer[1] = 2;
1435                 buffer[0] = 0;
1436         }
1437
1438         return 0;
1439 }
1440
1441 // decode 'raw' subchannel data ripped by cdrdao
1442 static void DecodeRawSubData(void) {
1443         unsigned char subQData[12];
1444         int i;
1445
1446         memset(subQData, 0, sizeof(subQData));
1447
1448         for (i = 0; i < 8 * 12; i++) {
1449                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1450                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1451                 }
1452         }
1453
1454         memcpy(&subbuffer[12], subQData, 12);
1455 }
1456
1457 // read track
1458 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1459 // uses bcd format
1460 static long CALLBACK ISOreadTrack(unsigned char *time) {
1461         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1462         long ret;
1463
1464         if (cdHandle == NULL) {
1465                 return -1;
1466         }
1467
1468         if (pregapOffset) {
1469                 subChanMissing = FALSE;
1470                 if (sector >= pregapOffset) {
1471                         sector -= 2 * 75;
1472                         if (sector < pregapOffset)
1473                                 subChanMissing = TRUE;
1474                 }
1475         }
1476
1477         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1478         if (ret < 0)
1479                 return -1;
1480
1481         if (subHandle != NULL) {
1482                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1483                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1484
1485                 if (subChanRaw) DecodeRawSubData();
1486         }
1487
1488         return 0;
1489 }
1490
1491 // plays cdda audio
1492 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1493 // does NOT uses bcd format
1494 static long CALLBACK ISOplay(unsigned char *time) {
1495         unsigned int i;
1496
1497         if (numtracks <= 1)
1498                 return 0;
1499
1500         // find the track
1501         cdda_cur_sector = msf2sec((char *)time);
1502         for (i = numtracks; i > 1; i--) {
1503                 cdda_first_sector = msf2sec(ti[i].start);
1504                 if (cdda_first_sector <= cdda_cur_sector + 2 * 75)
1505                         break;
1506         }
1507         cdda_file_offset = ti[i].start_offset;
1508
1509         // find the file that contains this track
1510         for (; i > 1; i--)
1511                 if (ti[i].handle != NULL)
1512                         break;
1513
1514         cddaHandle = ti[i].handle;
1515
1516         if (SPU_playCDDAchannel != NULL)
1517                 startCDDA();
1518
1519         return 0;
1520 }
1521
1522 // stops cdda audio
1523 static long CALLBACK ISOstop(void) {
1524         stopCDDA();
1525         return 0;
1526 }
1527
1528 // gets subchannel data
1529 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1530         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1531                 return subbuffer;
1532         }
1533
1534         return NULL;
1535 }
1536
1537 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1538         u32 sect;
1539
1540         CDR__getStatus(stat);
1541
1542         if (playing) {
1543                 stat->Type = 0x02;
1544                 stat->Status |= 0x80;
1545         }
1546         else {
1547                 // BIOS - boot ID (CD type)
1548                 stat->Type = ti[1].type;
1549         }
1550
1551         // relative -> absolute time
1552         sect = cddaCurPos;
1553         sec2msf(sect, (char *)stat->Time);
1554
1555         return 0;
1556 }
1557
1558 // read CDDA sector into buffer
1559 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1560         unsigned char msf[3] = {m, s, f};
1561         unsigned int file, track, track_start = 0;
1562         int ret;
1563
1564         cddaCurPos = msf2sec((char *)msf);
1565
1566         // find current track index
1567         for (track = numtracks; ; track--) {
1568                 track_start = msf2sec(ti[track].start);
1569                 if (track_start <= cddaCurPos)
1570                         break;
1571                 if (track == 1)
1572                         break;
1573         }
1574
1575         // data tracks play silent
1576         if (ti[track].type != CDDA) {
1577                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1578                 return 0;
1579         }
1580
1581         file = 1;
1582         if (multifile) {
1583                 // find the file that contains this track
1584                 for (file = track; file > 1; file--)
1585                         if (ti[file].handle != NULL)
1586                                 break;
1587         }
1588
1589         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1590                 buffer, cddaCurPos - track_start);
1591         if (ret != CD_FRAMESIZE_RAW) {
1592                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1593                 return -1;
1594         }
1595
1596         if (cddaBigEndian) {
1597                 int i;
1598                 unsigned char tmp;
1599
1600                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1601                         tmp = buffer[i * 2];
1602                         buffer[i * 2] = buffer[i * 2 + 1];
1603                         buffer[i * 2 + 1] = tmp;
1604                 }
1605         }
1606
1607         return 0;
1608 }
1609
1610 void cdrIsoInit(void) {
1611         CDR_init = ISOinit;
1612         CDR_shutdown = ISOshutdown;
1613         CDR_open = ISOopen;
1614         CDR_close = ISOclose;
1615         CDR_getTN = ISOgetTN;
1616         CDR_getTD = ISOgetTD;
1617         CDR_readTrack = ISOreadTrack;
1618         CDR_getBuffer = ISOgetBuffer;
1619         CDR_play = ISOplay;
1620         CDR_stop = ISOstop;
1621         CDR_getBufferSub = ISOgetBufferSub;
1622         CDR_getStatus = ISOgetStatus;
1623         CDR_readCDDA = ISOreadCDDA;
1624
1625         CDR_getDriveLetter = CDR__getDriveLetter;
1626         CDR_configure = CDR__configure;
1627         CDR_test = CDR__test;
1628         CDR_about = CDR__about;
1629         CDR_setfilename = CDR__setfilename;
1630
1631         numtracks = 0;
1632 }
1633
1634 int cdrIsoActive(void) {
1635         return (cdHandle != NULL);
1636 }