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 #define strcasecmp _stricmp
  30 #else
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <unistd.h>
  34 #if P_HAVE_PTHREAD
  35 #include <pthread.h>
  36 #include <sys/time.h>
  37 #endif
  38 #endif
  39 #include <errno.h>
  40 #include <zlib.h>
  41
  42 #ifdef HAVE_CHD
  43 #include "libchdr/chd.h"
  44 #endif
  45
  46 #define OFF_T_MSB ((off_t)1 << (sizeof(off_t) * 8 - 1))
  47
  48 unsigned int cdrIsoMultidiskCount;
  49 unsigned int cdrIsoMultidiskSelect;
  50
  51 static FILE *cdHandle = NULL;
  52 static FILE *cddaHandle = NULL;
  53 static FILE *subHandle = NULL;
  54
  55 static boolean subChanMixed = FALSE;
  56 static boolean subChanRaw = FALSE;
  57
  58 static boolean multifile = FALSE;
  59
  60 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
  61 static unsigned char subbuffer[SUB_FRAMESIZE];
  62
  63 static boolean cddaBigEndian = FALSE;
  64 /* Frame offset into CD image where pregap data would be found if it was there.
  65  * If a game seeks there we must *not* return subchannel data since it's
  66  * not in the CD image, so that cdrom code can fake subchannel data instead.
  67  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  68 static unsigned int pregapOffset;
  69
  70 // compressed image stuff
  71 static struct {
  72         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  73         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  74         off_t *index_table;
  75         unsigned int index_len;
  76         unsigned int block_shift;
  77         unsigned int current_block;
  78         unsigned int sector_in_blk;
  79 } *compr_img;
  80
  81 #ifdef HAVE_CHD
  82 static struct {
  83         unsigned char *buffer;
  84         chd_file* chd;
  85         const chd_header* header;
  86         unsigned int sectors_per_hunk;
  87         unsigned int current_hunk[2];
  88         unsigned int current_buffer;
  89         unsigned int sector_in_hunk;
  90 } *chd_img;
  91 #else
  92 #define chd_img 0
  93 #endif
  94
  95 static int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
  96 static int (*cdimg_read_sub_func)(FILE *f, 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__prefetch(u8 m, u8 s, u8 f);
 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 (chd: sector offset)
 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 static off_t get_size(FILE *f)
 163 {
 164         off_t old, size;
 165 #if !defined(USE_LIBRETRO_VFS)
 166         struct stat st;
 167         if (fstat(fileno(f), &st) == 0)
 168                 return st.st_size;
 169 #endif
 170         old = ftello(f);
 171         fseeko(f, 0, SEEK_END);
 172         size = ftello(f);
 173         fseeko(f, old, SEEK_SET);
 174         return size;
 175 }
 176
 177 // this function tries to get the .toc file of the given .bin
 178 // the necessary data is put into the ti (trackinformation)-array
 179 static int parsetoc(const char *isofile) {
 180         char                    tocname[MAXPATHLEN];
 181         FILE                    *fi;
 182         char                    linebuf[256], tmp[256], name[256];
 183         char                    *token;
 184         char                    time[20], time2[20];
 185         unsigned int    t, sector_offs, sector_size;
 186         unsigned int    current_zero_gap = 0;
 187
 188         numtracks = 0;
 189
 190         // copy name of the iso and change extension from .bin to .toc
 191         strncpy(tocname, isofile, sizeof(tocname));
 192         tocname[MAXPATHLEN - 1] = '\0';
 193         if (strlen(tocname) >= 4) {
 194                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 195         }
 196         else {
 197                 return -1;
 198         }
 199
 200         if ((fi = fopen(tocname, "r")) == NULL) {
 201                 // try changing extension to .cue (to satisfy some stupid tutorials)
 202                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 203                 if ((fi = fopen(tocname, "r")) == NULL) {
 204                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 205                         strcpy(tocname, isofile);
 206                         t = strlen(tocname);
 207                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 208                                 tocname[t - 4] = '\0';
 209                                 if ((fi = fopen(tocname, "r")) == NULL) {
 210                                         return -1;
 211                                 }
 212                         }
 213                         else {
 214                                 return -1;
 215                         }
 216                 }
 217                 // check if it's really a TOC named as a .cue
 218                 if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 219                 token = strtok(linebuf, " ");
 220                 if (token && strncmp(token, "CD", 2) != 0) {
 221                        // && strcmp(token, "CATALOG") != 0) - valid for a real .cue
 222                         fclose(fi);
 223                         return -1;
 224                 }
 225                 }
 226                 fseek(fi, 0, SEEK_SET);
 227         }
 228
 229         memset(&ti, 0, sizeof(ti));
 230         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 231
 232         sector_size = CD_FRAMESIZE_RAW;
 233         sector_offs = 2 * 75;
 234
 235         // parse the .toc file
 236         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 237                 // search for tracks
 238                 strncpy(tmp, linebuf, sizeof(linebuf));
 239                 token = strtok(tmp, " ");
 240
 241                 if (token == NULL) continue;
 242
 243                 if (!strcmp(token, "TRACK")) {
 244                         sector_offs += current_zero_gap;
 245                         current_zero_gap = 0;
 246
 247                         // get type of track
 248                         token = strtok(NULL, " ");
 249                         numtracks++;
 250
 251                         if (!strncmp(token, "MODE2_RAW", 9)) {
 252                                 ti[numtracks].type = DATA;
 253                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 254
 255                                 // check if this image contains mixed subchannel data
 256                                 token = strtok(NULL, " ");
 257                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 258                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 259                                         subChanMixed = TRUE;
 260                                         if (!strncmp(token, "RW_RAW", 6))
 261                                                 subChanRaw = TRUE;
 262                                 }
 263                         }
 264                         else if (!strncmp(token, "AUDIO", 5)) {
 265                                 ti[numtracks].type = CDDA;
 266                         }
 267                 }
 268                 else if (!strcmp(token, "DATAFILE")) {
 269                         if (ti[numtracks].type == CDDA) {
 270                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 271                                 ti[numtracks].start_offset = t;
 272                                 t = t / sector_size + sector_offs;
 273                                 sec2msf(t, (char *)&ti[numtracks].start);
 274                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 275                         }
 276                         else {
 277                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 278                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 279                         }
 280                 }
 281                 else if (!strcmp(token, "FILE")) {
 282                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 283                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 284                         t += msf2sec(ti[numtracks].start) * sector_size;
 285                         ti[numtracks].start_offset = t;
 286                         t = t / sector_size + sector_offs;
 287                         sec2msf(t, (char *)&ti[numtracks].start);
 288                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 289                 }
 290                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 291                         // skip unneeded optional fields
 292                         while (token != NULL) {
 293                                 token = strtok(NULL, " ");
 294                                 if (strchr(token, ':') != NULL)
 295                                         break;
 296                         }
 297                         if (token != NULL) {
 298                                 tok2msf(token, tmp);
 299                                 current_zero_gap = msf2sec(tmp);
 300                         }
 301                         if (numtracks > 1) {
 302                                 t = ti[numtracks - 1].start_offset;
 303                                 t /= sector_size;
 304                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 305                         }
 306                 }
 307                 else if (!strcmp(token, "START")) {
 308                         token = strtok(NULL, " ");
 309                         if (token != NULL && strchr(token, ':')) {
 310                                 tok2msf(token, tmp);
 311                                 t = msf2sec(tmp);
 312                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 313                                 t = msf2sec(ti[numtracks].start) + t;
 314                                 sec2msf(t, (char *)&ti[numtracks].start);
 315                         }
 316                 }
 317         }
 318
 319         fclose(fi);
 320
 321         return 0;
 322 }
 323
 324 // this function tries to get the .cue file of the given .bin
 325 // the necessary data is put into the ti (trackinformation)-array
 326 static int parsecue(const char *isofile) {
 327         char                    cuename[MAXPATHLEN];
 328         char                    filepath[MAXPATHLEN];
 329         char                    *incue_fname;
 330         FILE                    *fi;
 331         FILE                    *ftmp = NULL;
 332         char                    *token;
 333         char                    time[20];
 334         char                    *tmp;
 335         char                    linebuf[256], tmpb[256], dummy[256];
 336         unsigned int    incue_max_len;
 337         unsigned int    t, file_len, mode, sector_offs;
 338         unsigned int    sector_size = 2352;
 339
 340         numtracks = 0;
 341
 342         // copy name of the iso and change extension from .bin to .cue
 343         strncpy(cuename, isofile, sizeof(cuename));
 344         cuename[MAXPATHLEN - 1] = '\0';
 345         if (strlen(cuename) < 4)
 346                 return -1;
 347         if (strcasecmp(cuename + strlen(cuename) - 4, ".cue") == 0) {
 348                 // it's already open as cdHandle
 349                 fi = cdHandle;
 350         }
 351         else {
 352                 // If 'isofile' is a '.cd<X>' file, use it as a .cue file
 353                 //  and don't try to search the additional .cue file
 354                 if (strncasecmp(cuename + strlen(cuename) - 4, ".cd", 3) != 0 )
 355                         strcpy(cuename + strlen(cuename) - 4, ".cue");
 356
 357                 if ((ftmp = fopen(cuename, "r")) == NULL)
 358                         return -1;
 359                 fi = ftmp;
 360         }
 361
 362         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 363         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 364         // that...
 365         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 366                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 367                         // Don't proceed further, as this is actually a .toc file rather
 368                         // than a .cue file.
 369                         if (ftmp)
 370                                 fclose(ftmp);
 371                         return parsetoc(isofile);
 372                 }
 373                 rewind(fi);
 374         }
 375
 376         // build a path for files referenced in .cue
 377         strncpy(filepath, cuename, sizeof(filepath));
 378         tmp = strrchr(filepath, '/');
 379         if (tmp == NULL)
 380                 tmp = strrchr(filepath, '\\');
 381         if (tmp != NULL)
 382                 tmp++;
 383         else
 384                 tmp = filepath;
 385         *tmp = 0;
 386         filepath[sizeof(filepath) - 1] = 0;
 387         incue_fname = tmp;
 388         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 389
 390         memset(&ti, 0, sizeof(ti));
 391
 392         file_len = 0;
 393         sector_offs = 2 * 75;
 394
 395         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 396                 strncpy(dummy, linebuf, sizeof(linebuf));
 397                 token = strtok(dummy, " ");
 398
 399                 if (token == NULL) {
 400                         continue;
 401                 }
 402
 403                 if (!strcmp(token, "TRACK")) {
 404                         numtracks++;
 405
 406                         sector_size = 0;
 407                         if (strstr(linebuf, "AUDIO") != NULL) {
 408                                 ti[numtracks].type = CDDA;
 409                                 sector_size = 2352;
 410                         }
 411                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 412                                 ti[numtracks].type = DATA;
 413                         else {
 414                                 SysPrintf(".cue: failed to parse TRACK\n");
 415                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 416                         }
 417                         if (sector_size == 0)
 418                                 sector_size = 2352;
 419                 }
 420                 else if (!strcmp(token, "INDEX")) {
 421                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 422                                 SysPrintf(".cue: failed to parse INDEX\n");
 423                         tok2msf(time, (char *)&ti[numtracks].start);
 424
 425                         t = msf2sec(ti[numtracks].start);
 426                         ti[numtracks].start_offset = t * sector_size;
 427                         t += sector_offs;
 428                         sec2msf(t, ti[numtracks].start);
 429
 430                         // default track length to file length
 431                         t = file_len - ti[numtracks].start_offset / sector_size;
 432                         sec2msf(t, ti[numtracks].length);
 433
 434                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 435                                 // this track uses the same file as the last,
 436                                 // start of this track is last track's end
 437                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 438                                 sec2msf(t, ti[numtracks - 1].length);
 439                         }
 440                         if (numtracks > 1 && pregapOffset == -1)
 441                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 442                 }
 443                 else if (!strcmp(token, "PREGAP")) {
 444                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 445                                 tok2msf(time, dummy);
 446                                 sector_offs += msf2sec(dummy);
 447                         }
 448                         pregapOffset = -1; // mark to fill track start_offset
 449                 }
 450                 else if (!strcmp(token, "FILE")) {
 451                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 452                         if (t != 1)
 453                                 sscanf(linebuf, " FILE %255s", tmpb);
 454
 455                         // absolute path?
 456                         ti[numtracks + 1].handle = fopen(tmpb, "rb");
 457                         if (ti[numtracks + 1].handle == NULL) {
 458                                 // relative to .cue?
 459                                 tmp = strrchr(tmpb, '\\');
 460                                 if (tmp == NULL)
 461                                         tmp = strrchr(tmpb, '/');
 462                                 if (tmp != NULL)
 463                                         tmp++;
 464                                 else
 465                                         tmp = tmpb;
 466                                 strncpy(incue_fname, tmp, incue_max_len);
 467                                 ti[numtracks + 1].handle = fopen(filepath, "rb");
 468                         }
 469
 470                         // update global offset if this is not first file in this .cue
 471                         if (numtracks + 1 > 1) {
 472                                 multifile = 1;
 473                                 sector_offs += file_len;
 474                         }
 475
 476                         file_len = 0;
 477                         if (ti[numtracks + 1].handle == NULL) {
 478                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 479                                 continue;
 480                         }
 481                         file_len = get_size(ti[numtracks + 1].handle) / 2352;
 482                 }
 483         }
 484
 485         if (ftmp)
 486                 fclose(ftmp);
 487
 488         // if there are no tracks detected, then it's not a cue file
 489         if (!numtracks)
 490                 return -1;
 491
 492         // the data track handle is always in cdHandle
 493         if (ti[1].handle) {
 494                 fclose(cdHandle);
 495                 cdHandle = ti[1].handle;
 496                 ti[1].handle = NULL;
 497         }
 498         return 0;
 499 }
 500
 501 // this function tries to get the .ccd file of the given .img
 502 // the necessary data is put into the ti (trackinformation)-array
 503 static int parseccd(const char *isofile) {
 504         char                    ccdname[MAXPATHLEN];
 505         FILE                    *fi;
 506         char                    linebuf[256];
 507         unsigned int    t;
 508
 509         numtracks = 0;
 510
 511         // copy name of the iso and change extension from .img to .ccd
 512         strncpy(ccdname, isofile, sizeof(ccdname));
 513         ccdname[MAXPATHLEN - 1] = '\0';
 514         if (strlen(ccdname) >= 4) {
 515                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 516         }
 517         else {
 518                 return -1;
 519         }
 520
 521         if ((fi = fopen(ccdname, "r")) == NULL) {
 522                 return -1;
 523         }
 524
 525         memset(&ti, 0, sizeof(ti));
 526
 527         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 528                 if (!strncmp(linebuf, "[TRACK", 6)){
 529                         numtracks++;
 530                 }
 531                 else if (!strncmp(linebuf, "MODE=", 5)) {
 532                         sscanf(linebuf, "MODE=%d", &t);
 533                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 534                 }
 535                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 536                         sscanf(linebuf, "INDEX 1=%d", &t);
 537                         sec2msf(t + 2 * 75, ti[numtracks].start);
 538                         ti[numtracks].start_offset = t * 2352;
 539
 540                         // If we've already seen another track, this is its end
 541                         if (numtracks > 1) {
 542                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 543                                 sec2msf(t, ti[numtracks - 1].length);
 544                         }
 545                 }
 546         }
 547
 548         fclose(fi);
 549
 550         // Fill out the last track's end based on size
 551         if (numtracks >= 1) {
 552                 t = get_size(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 553                 sec2msf(t, ti[numtracks].length);
 554         }
 555
 556         return 0;
 557 }
 558
 559 // this function tries to get the .mds file of the given .mdf
 560 // the necessary data is put into the ti (trackinformation)-array
 561 static int parsemds(const char *isofile) {
 562         char                    mdsname[MAXPATHLEN];
 563         FILE                    *fi;
 564         unsigned int    offset, extra_offset, l, i;
 565         unsigned short  s;
 566
 567         numtracks = 0;
 568
 569         // copy name of the iso and change extension from .mdf to .mds
 570         strncpy(mdsname, isofile, sizeof(mdsname));
 571         mdsname[MAXPATHLEN - 1] = '\0';
 572         if (strlen(mdsname) >= 4) {
 573                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 574         }
 575         else {
 576                 return -1;
 577         }
 578
 579         if ((fi = fopen(mdsname, "rb")) == NULL) {
 580                 return -1;
 581         }
 582
 583         memset(&ti, 0, sizeof(ti));
 584
 585         // check if it's a valid mds file
 586         if (fread(&i, 1, sizeof(i), fi) != sizeof(i))
 587                 goto fail_io;
 588         i = SWAP32(i);
 589         if (i != 0x4944454D) {
 590                 // not an valid mds file
 591                 fclose(fi);
 592                 return -1;
 593         }
 594
 595         // get offset to session block
 596         fseek(fi, 0x50, SEEK_SET);
 597         if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
 598                 goto fail_io;
 599         offset = SWAP32(offset);
 600
 601         // get total number of tracks
 602         offset += 14;
 603         fseek(fi, offset, SEEK_SET);
 604         if (fread(&s, 1, sizeof(s), fi) != sizeof(s))
 605                 goto fail_io;
 606         s = SWAP16(s);
 607         numtracks = s;
 608
 609         // get offset to track blocks
 610         fseek(fi, 4, SEEK_CUR);
 611         if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
 612                 goto fail_io;
 613         offset = SWAP32(offset);
 614
 615         // skip lead-in data
 616         while (1) {
 617                 fseek(fi, offset + 4, SEEK_SET);
 618                 if (fgetc(fi) < 0xA0) {
 619                         break;
 620                 }
 621                 offset += 0x50;
 622         }
 623
 624         // check if the image contains mixed subchannel data
 625         fseek(fi, offset + 1, SEEK_SET);
 626         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 627
 628         // read track data
 629         for (i = 1; i <= numtracks; i++) {
 630                 fseek(fi, offset, SEEK_SET);
 631
 632                 // get the track type
 633                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 634                 fseek(fi, 8, SEEK_CUR);
 635
 636                 // get the track starting point
 637                 ti[i].start[0] = fgetc(fi);
 638                 ti[i].start[1] = fgetc(fi);
 639                 ti[i].start[2] = fgetc(fi);
 640
 641                 if (fread(&extra_offset, 1, sizeof(extra_offset), fi) != sizeof(extra_offset))
 642                         goto fail_io;
 643                 extra_offset = SWAP32(extra_offset);
 644
 645                 // get track start offset (in .mdf)
 646                 fseek(fi, offset + 0x28, SEEK_SET);
 647                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
 648                         goto fail_io;
 649                 l = SWAP32(l);
 650                 ti[i].start_offset = l;
 651
 652                 // get pregap
 653                 fseek(fi, extra_offset, SEEK_SET);
 654                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
 655                         goto fail_io;
 656                 l = SWAP32(l);
 657                 if (l != 0 && i > 1)
 658                         pregapOffset = msf2sec(ti[i].start);
 659
 660                 // get the track length
 661                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
 662                         goto fail_io;
 663                 l = SWAP32(l);
 664                 sec2msf(l, ti[i].length);
 665
 666                 offset += 0x50;
 667         }
 668         fclose(fi);
 669         return 0;
 670 fail_io:
 671 #ifndef NDEBUG
 672         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
 673 #endif
 674         fclose(fi);
 675         return -1;
 676 }
 677
 678 static int handlepbp(const char *isofile) {
 679         struct {
 680                 unsigned int sig;
 681                 unsigned int dontcare[8];
 682                 unsigned int psar_offs;
 683         } pbp_hdr;
 684         struct {
 685                 unsigned char type;
 686                 unsigned char pad0;
 687                 unsigned char track;
 688                 char index0[3];
 689                 char pad1;
 690                 char index1[3];
 691         } toc_entry;
 692         struct {
 693                 unsigned int offset;
 694                 unsigned int size;
 695                 unsigned int dontcare[6];
 696         } index_entry;
 697         char psar_sig[11];
 698         off_t psisoimg_offs, cdimg_base;
 699         unsigned int t, cd_length;
 700         unsigned int offsettab[8];
 701         unsigned int psar_offs, index_entry_size, index_entry_offset;
 702         const char *ext = NULL;
 703         int i, ret;
 704
 705         if (strlen(isofile) >= 4)
 706                 ext = isofile + strlen(isofile) - 4;
 707         if (ext == NULL || strcasecmp(ext, ".pbp") != 0)
 708                 return -1;
 709
 710         numtracks = 0;
 711
 712         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 713         if (ret != sizeof(pbp_hdr)) {
 714                 SysPrintf("failed to read pbp\n");
 715                 goto fail_io;
 716         }
 717
 718         psar_offs = SWAP32(pbp_hdr.psar_offs);
 719
 720         ret = fseeko(cdHandle, psar_offs, SEEK_SET);
 721         if (ret != 0) {
 722                 SysPrintf("failed to seek to %x\n", psar_offs);
 723                 goto fail_io;
 724         }
 725
 726         psisoimg_offs = psar_offs;
 727         if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
 728                 goto fail_io;
 729         psar_sig[10] = 0;
 730         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 731                 // multidisk image?
 732                 ret = fseeko(cdHandle, psar_offs + 0x200, SEEK_SET);
 733                 if (ret != 0) {
 734                         SysPrintf("failed to seek to %x\n", psar_offs + 0x200);
 735                         goto fail_io;
 736                 }
 737
 738                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 739                         SysPrintf("failed to read offsettab\n");
 740                         goto fail_io;
 741                 }
 742
 743                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 744                         if (offsettab[i] == 0)
 745                                 break;
 746                 }
 747                 cdrIsoMultidiskCount = i;
 748                 if (cdrIsoMultidiskCount == 0) {
 749                         SysPrintf("multidisk eboot has 0 images?\n");
 750                         goto fail_io;
 751                 }
 752
 753                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 754                         cdrIsoMultidiskSelect = 0;
 755
 756                 psisoimg_offs += SWAP32(offsettab[cdrIsoMultidiskSelect]);
 757
 758                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 759                 if (ret != 0) {
 760                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 761                         goto fail_io;
 762                 }
 763
 764                 if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
 765                         goto fail_io;
 766                 psar_sig[10] = 0;
 767         }
 768
 769         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 770                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 771                 goto fail_io;
 772         }
 773
 774         // seek to TOC
 775         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 776         if (ret != 0) {
 777                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 778                 goto fail_io;
 779         }
 780
 781         // first 3 entries are special
 782         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 783         if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
 784                 goto fail_io;
 785         numtracks = btoi(toc_entry.index1[0]);
 786
 787         if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
 788                 goto fail_io;
 789         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 790                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 791
 792         for (i = 1; i <= numtracks; i++) {
 793                 if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
 794                         goto fail_io;
 795
 796                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 797
 798                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 799                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 800                 ti[i].start_offset *= 2352;
 801                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 802                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 803                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 804
 805                 if (i > 1) {
 806                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 807                         sec2msf(t, ti[i - 1].length);
 808                 }
 809         }
 810         t = cd_length - ti[numtracks].start_offset / 2352;
 811         sec2msf(t, ti[numtracks].length);
 812
 813         // seek to ISO index
 814         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 815         if (ret != 0) {
 816                 SysPrintf("failed to seek to ISO index\n");
 817                 goto fail_io;
 818         }
 819
 820         compr_img = calloc(1, sizeof(*compr_img));
 821         if (compr_img == NULL)
 822                 goto fail_io;
 823
 824         compr_img->block_shift = 4;
 825         compr_img->current_block = (unsigned int)-1;
 826
 827         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 828         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 829         if (compr_img->index_table == NULL)
 830                 goto fail_io;
 831
 832         cdimg_base = psisoimg_offs + 0x100000;
 833         for (i = 0; i < compr_img->index_len; i++) {
 834                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 835                 if (ret != sizeof(index_entry)) {
 836                         SysPrintf("failed to read index_entry #%d\n", i);
 837                         goto fail_index;
 838                 }
 839
 840                 index_entry_size = SWAP32(index_entry.size);
 841                 index_entry_offset = SWAP32(index_entry.offset);
 842
 843                 if (index_entry_size == 0)
 844                         break;
 845
 846                 compr_img->index_table[i] = cdimg_base + index_entry_offset;
 847         }
 848         compr_img->index_table[i] = cdimg_base + index_entry_offset + index_entry_size;
 849
 850         return 0;
 851
 852 fail_index:
 853         free(compr_img->index_table);
 854         compr_img->index_table = NULL;
 855         goto done;
 856
 857 fail_io:
 858         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
 859         rewind(cdHandle);
 860
 861 done:
 862         if (compr_img != NULL) {
 863                 free(compr_img);
 864                 compr_img = NULL;
 865         }
 866         return -1;
 867 }
 868
 869 static int handlecbin(const char *isofile) {
 870         struct
 871         {
 872                 char magic[4];
 873                 unsigned int header_size;
 874                 unsigned long long total_bytes;
 875                 unsigned int block_size;
 876                 unsigned char ver;              // 1
 877                 unsigned char align;
 878                 unsigned char rsv_06[2];
 879         } ciso_hdr;
 880         const char *ext = NULL;
 881         unsigned int *index_table = NULL;
 882         unsigned int index = 0, plain;
 883         int i, ret;
 884
 885         if (strlen(isofile) >= 5)
 886                 ext = isofile + strlen(isofile) - 5;
 887         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 888                 return -1;
 889
 890         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 891         if (ret != sizeof(ciso_hdr)) {
 892                 SysPrintf("failed to read ciso header\n");
 893                 goto fail_io;
 894         }
 895
 896         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 897                 SysPrintf("bad ciso header\n");
 898                 goto fail_io;
 899         }
 900         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 901                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
 902                 if (ret != 0) {
 903                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 904                         goto fail_io;
 905                 }
 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 = 0;
 913         compr_img->current_block = (unsigned int)-1;
 914
 915         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
 916         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
 917         if (index_table == NULL)
 918                 goto fail_io;
 919
 920         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
 921         if (ret != compr_img->index_len) {
 922                 SysPrintf("failed to read index table\n");
 923                 goto fail_index;
 924         }
 925
 926         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 927         if (compr_img->index_table == NULL)
 928                 goto fail_index;
 929
 930         for (i = 0; i < compr_img->index_len + 1; i++) {
 931                 index = index_table[i];
 932                 plain = index & 0x80000000;
 933                 index &= 0x7fffffff;
 934                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
 935                 if (plain)
 936                         compr_img->index_table[i] |= OFF_T_MSB;
 937         }
 938
 939         return 0;
 940
 941 fail_index:
 942         free(index_table);
 943 fail_io:
 944         if (compr_img != NULL) {
 945                 free(compr_img);
 946                 compr_img = NULL;
 947         }
 948         rewind(cdHandle);
 949         return -1;
 950 }
 951
 952 #ifdef HAVE_CHD
 953 static int handlechd(const char *isofile) {
 954         int frame_offset = 150;
 955         int file_offset = 0;
 956
 957         chd_img = calloc(1, sizeof(*chd_img));
 958         if (chd_img == NULL)
 959                 goto fail_io;
 960
 961         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
 962                 goto fail_io;
 963
 964         if (Config.CHD_Precache && (chd_precache(chd_img->chd) != CHDERR_NONE))
 965                 goto fail_io;
 966
 967         chd_img->header = chd_get_header(chd_img->chd);
 968
 969         chd_img->buffer = malloc(chd_img->header->hunkbytes * 2);
 970         if (chd_img->buffer == NULL)
 971                 goto fail_io;
 972
 973         chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
 974         chd_img->current_hunk[0] = (unsigned int)-1;
 975         chd_img->current_hunk[1] = (unsigned int)-1;
 976
 977         cddaBigEndian = TRUE;
 978
 979         numtracks = 0;
 980         memset(ti, 0, sizeof(ti));
 981
 982         while (1)
 983         {
 984                 struct {
 985                         char type[64];
 986                         char subtype[32];
 987                         char pgtype[32];
 988                         char pgsub[32];
 989                         uint32_t track;
 990                         uint32_t frames;
 991                         uint32_t pregap;
 992                         uint32_t postgap;
 993                 } md = {};
 994                 char meta[256];
 995                 uint32_t meta_size = 0;
 996
 997                 if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
 998                         sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
 999                 else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
1000                         sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
1001                 else
1002                         break;
1003
1004                 SysPrintf("chd: %s\n", meta);
1005
1006                 if (md.track == 1) {
1007                         if (!strncmp(md.subtype, "RW", 2)) {
1008                                 subChanMixed = TRUE;
1009                                 if (!strcmp(md.subtype, "RW_RAW"))
1010                                         subChanRaw = TRUE;
1011                         }
1012                 }
1013
1014                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
1015
1016                 sec2msf(frame_offset + md.pregap, ti[md.track].start);
1017                 sec2msf(md.frames, ti[md.track].length);
1018
1019                 ti[md.track].start_offset = file_offset + md.pregap;
1020
1021                 // XXX: what about postgap?
1022                 frame_offset += md.frames;
1023                 file_offset += md.frames;
1024                 numtracks++;
1025         }
1026
1027         if (numtracks)
1028                 return 0;
1029
1030 fail_io:
1031         if (chd_img != NULL) {
1032                 free(chd_img->buffer);
1033                 free(chd_img);
1034                 chd_img = NULL;
1035         }
1036         return -1;
1037 }
1038 #endif
1039
1040 // this function tries to get the .sub file of the given .img
1041 static int opensubfile(const char *isoname) {
1042         char            subname[MAXPATHLEN];
1043
1044         // copy name of the iso and change extension from .img to .sub
1045         strncpy(subname, isoname, sizeof(subname));
1046         subname[MAXPATHLEN - 1] = '\0';
1047         if (strlen(subname) >= 4) {
1048                 strcpy(subname + strlen(subname) - 4, ".sub");
1049         }
1050         else {
1051                 return -1;
1052         }
1053
1054         subHandle = fopen(subname, "rb");
1055         if (subHandle == NULL) {
1056                 return -1;
1057         }
1058
1059         return 0;
1060 }
1061
1062 static int opensbifile(const char *isoname) {
1063         char            sbiname[MAXPATHLEN], disknum[MAXPATHLEN] = "0";
1064         int             s;
1065
1066         strncpy(sbiname, isoname, sizeof(sbiname));
1067         sbiname[MAXPATHLEN - 1] = '\0';
1068         if (strlen(sbiname) >= 4) {
1069                 if (cdrIsoMultidiskCount > 1) {
1070                         sprintf(disknum, "_%i.sbi", cdrIsoMultidiskSelect + 1);
1071                         strcpy(sbiname + strlen(sbiname) - 4, disknum);
1072                 }
1073                 else
1074                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1075         }
1076         else {
1077                 return -1;
1078         }
1079
1080         s = msf2sec(ti[1].length);
1081
1082         return LoadSBI(sbiname, s);
1083 }
1084
1085 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1086 {
1087         int ret;
1088         if (!f)
1089                 return -1;
1090         if (fseeko(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET))
1091                 goto fail_io;
1092         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1093         if (ret <= 0)
1094                 goto fail_io;
1095         return ret;
1096
1097 fail_io:
1098         // often happens in cdda gaps of a split cue/bin, so not logged
1099         //SysPrintf("File IO error %d, base %u, sector %u\n", errno, base, sector);
1100         return -1;
1101 }
1102
1103 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1104 {
1105         int ret;
1106
1107         if (!f)
1108                 return -1;
1109         if (fseeko(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET))
1110                 goto fail_io;
1111         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1112         if (ret <= 0)
1113                 goto fail_io;
1114         return ret;
1115
1116 fail_io:
1117         //SysPrintf("File IO error %d, base %u, sector %u\n", errno, base, sector);
1118         return -1;
1119 }
1120
1121 static int cdread_sub_sub_mixed(FILE *f, int sector)
1122 {
1123         if (!f)
1124                 return -1;
1125         if (fseeko(f, sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE) + CD_FRAMESIZE_RAW, SEEK_SET))
1126                 goto fail_io;
1127         if (fread(subbuffer, 1, SUB_FRAMESIZE, f) != SUB_FRAMESIZE)
1128                 goto fail_io;
1129
1130         return SUB_FRAMESIZE;
1131
1132 fail_io:
1133         SysPrintf("subchannel: file IO error %d, sector %u\n", errno, sector);
1134         return -1;
1135 }
1136
1137 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1138 {
1139         static z_stream z;
1140         int ret = 0;
1141
1142         if (z.zalloc == NULL) {
1143                 // XXX: one-time leak here..
1144                 z.next_in = Z_NULL;
1145                 z.avail_in = 0;
1146                 z.zalloc = Z_NULL;
1147                 z.zfree = Z_NULL;
1148                 z.opaque = Z_NULL;
1149                 ret = inflateInit2(&z, -15);
1150         }
1151         else
1152                 ret = inflateReset(&z);
1153         if (ret != Z_OK)
1154                 return ret;
1155
1156         z.next_in = in;
1157         z.avail_in = in_size;
1158         z.next_out = out;
1159         z.avail_out = *out_size;
1160
1161         ret = inflate(&z, Z_NO_FLUSH);
1162         //inflateEnd(&z);
1163
1164         *out_size -= z.avail_out;
1165         return ret == 1 ? 0 : ret;
1166 }
1167
1168 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1169 {
1170         unsigned long cdbuffer_size, cdbuffer_size_expect;
1171         unsigned int size;
1172         int is_compressed;
1173         off_t start_byte;
1174         int ret, block;
1175
1176         if (!cdHandle)
1177                 return -1;
1178         if (base)
1179                 sector += base / 2352;
1180
1181         block = sector >> compr_img->block_shift;
1182         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1183
1184         if (block == compr_img->current_block) {
1185                 //printf("hit sect %d\n", sector);
1186                 goto finish;
1187         }
1188
1189         if (sector >= compr_img->index_len * 16) {
1190                 SysPrintf("sector %d is past img end\n", sector);
1191                 return -1;
1192         }
1193
1194         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1195         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1196                 SysPrintf("seek error for block %d at %llx: ",
1197                         block, (long long)start_byte);
1198                 perror(NULL);
1199                 return -1;
1200         }
1201
1202         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1203         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1204         if (size > sizeof(compr_img->buff_compressed)) {
1205                 SysPrintf("block %d is too large: %u\n", block, size);
1206                 return -1;
1207         }
1208
1209         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1210                                 1, size, cdHandle) != size) {
1211                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1212                 perror(NULL);
1213                 return -1;
1214         }
1215
1216         if (is_compressed) {
1217                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1218                 cdbuffer_size = cdbuffer_size_expect;
1219                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1220                 if (ret != 0) {
1221                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1222                                         ret, block, sector);
1223                         return -1;
1224                 }
1225                 if (cdbuffer_size != cdbuffer_size_expect)
1226                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1227                                         cdbuffer_size_expect, sector);
1228         }
1229
1230         // done at last!
1231         compr_img->current_block = block;
1232
1233 finish:
1234         if (dest != cdbuffer) // copy avoid HACK
1235                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1236                         CD_FRAMESIZE_RAW);
1237         return CD_FRAMESIZE_RAW;
1238 }
1239
1240 #ifdef HAVE_CHD
1241 static unsigned char *chd_get_sector(unsigned int current_buffer, unsigned int sector_in_hunk)
1242 {
1243         return chd_img->buffer
1244                 + current_buffer * chd_img->header->hunkbytes
1245                 + sector_in_hunk * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
1246 }
1247
1248 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1249 {
1250         int hunk;
1251
1252         sector += base;
1253
1254         hunk = sector / chd_img->sectors_per_hunk;
1255         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1256
1257         if (hunk == chd_img->current_hunk[0])
1258                 chd_img->current_buffer = 0;
1259         else if (hunk == chd_img->current_hunk[1])
1260                 chd_img->current_buffer = 1;
1261         else
1262         {
1263                 chd_read(chd_img->chd, hunk, chd_img->buffer +
1264                         chd_img->current_buffer * chd_img->header->hunkbytes);
1265                 chd_img->current_hunk[chd_img->current_buffer] = hunk;
1266         }
1267
1268         if (dest != cdbuffer) // copy avoid HACK
1269                 memcpy(dest, chd_get_sector(chd_img->current_buffer, chd_img->sector_in_hunk),
1270                         CD_FRAMESIZE_RAW);
1271         return CD_FRAMESIZE_RAW;
1272 }
1273
1274 static int cdread_sub_chd(FILE *f, int sector)
1275 {
1276         unsigned int sector_in_hunk;
1277         unsigned int buffer;
1278         int hunk;
1279
1280         if (!subChanMixed)
1281                 return -1;
1282
1283         hunk = sector / chd_img->sectors_per_hunk;
1284         sector_in_hunk = sector % chd_img->sectors_per_hunk;
1285
1286         if (hunk == chd_img->current_hunk[0])
1287                 buffer = 0;
1288         else if (hunk == chd_img->current_hunk[1])
1289                 buffer = 1;
1290         else
1291         {
1292                 buffer = chd_img->current_buffer ^ 1;
1293                 chd_read(chd_img->chd, hunk, chd_img->buffer +
1294                         buffer * chd_img->header->hunkbytes);
1295                 chd_img->current_hunk[buffer] = hunk;
1296         }
1297
1298         memcpy(subbuffer, chd_get_sector(buffer, sector_in_hunk) + CD_FRAMESIZE_RAW, SUB_FRAMESIZE);
1299         return SUB_FRAMESIZE;
1300 }
1301 #endif
1302
1303 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1304 {
1305         int ret;
1306
1307         if (!f)
1308                 return -1;
1309         fseeko(f, base + sector * 2048, SEEK_SET);
1310         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1311
1312         // not really necessary, fake mode 2 header
1313         memset(cdbuffer, 0, 12 * 2);
1314         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1315         cdbuffer[12 + 3] = 1;
1316
1317         return 12*2 + ret;
1318 }
1319
1320 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1321         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1322 }
1323
1324 #ifdef HAVE_CHD
1325 static unsigned char * CALLBACK ISOgetBuffer_chd(void) {
1326         return chd_get_sector(chd_img->current_buffer, chd_img->sector_in_hunk) + 12;
1327 }
1328 #endif
1329
1330 unsigned char * CALLBACK ISOgetBuffer(void) {
1331         return cdbuffer + 12;
1332 }
1333
1334 static void PrintTracks(void) {
1335         int i;
1336
1337         for (i = 1; i <= numtracks; i++) {
1338                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1339                         i, (ti[i].type == DATA ? "DATA" :
1340                             (ti[i].type == CDDA ? "AUDIO" : "UNKNOWN")),
1341                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1342                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1343         }
1344 }
1345
1346 // This function is invoked by the front-end when opening an ISO
1347 // file for playback
1348 static long CALLBACK ISOopen(void) {
1349         boolean isMode1ISO = FALSE;
1350         char alt_bin_filename[MAXPATHLEN];
1351         const char *bin_filename;
1352         char image_str[1024];
1353         off_t size_main;
1354
1355         if (cdHandle || chd_img) {
1356                 return 0; // it's already open
1357         }
1358
1359         cdHandle = fopen(GetIsoFile(), "rb");
1360         if (cdHandle == NULL) {
1361                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1362                         GetIsoFile(), strerror(errno));
1363                 return -1;
1364         }
1365         size_main = get_size(cdHandle);
1366
1367         snprintf(image_str, sizeof(image_str) - 6*4 - 1,
1368                 "Loaded CD Image: %s", GetIsoFile());
1369
1370         cddaBigEndian = FALSE;
1371         subChanMixed = FALSE;
1372         subChanRaw = FALSE;
1373         pregapOffset = 0;
1374         cdrIsoMultidiskCount = 1;
1375         multifile = 0;
1376
1377         CDR_getBuffer = ISOgetBuffer;
1378         cdimg_read_func = cdread_normal;
1379         cdimg_read_sub_func = NULL;
1380
1381         if (parsetoc(GetIsoFile()) == 0) {
1382                 strcat(image_str, "[+toc]");
1383         }
1384         else if (parseccd(GetIsoFile()) == 0) {
1385                 strcat(image_str, "[+ccd]");
1386         }
1387         else if (parsemds(GetIsoFile()) == 0) {
1388                 strcat(image_str, "[+mds]");
1389         }
1390         else if (parsecue(GetIsoFile()) == 0) {
1391                 strcat(image_str, "[+cue]");
1392         }
1393         if (handlepbp(GetIsoFile()) == 0) {
1394                 strcat(image_str, "[+pbp]");
1395                 CDR_getBuffer = ISOgetBuffer_compr;
1396                 cdimg_read_func = cdread_compressed;
1397         }
1398         else if (handlecbin(GetIsoFile()) == 0) {
1399                 strcat(image_str, "[+cbin]");
1400                 CDR_getBuffer = ISOgetBuffer_compr;
1401                 cdimg_read_func = cdread_compressed;
1402         }
1403 #ifdef HAVE_CHD
1404         else if (handlechd(GetIsoFile()) == 0) {
1405                 strcat(image_str, "[+chd]");
1406                 CDR_getBuffer = ISOgetBuffer_chd;
1407                 cdimg_read_func = cdread_chd;
1408                 cdimg_read_sub_func = cdread_sub_chd;
1409                 fclose(cdHandle);
1410                 cdHandle = NULL;
1411         }
1412 #endif
1413
1414         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1415                 strcat(image_str, "[+sub]");
1416         }
1417         if (opensbifile(GetIsoFile()) == 0) {
1418                 strcat(image_str, "[+sbi]");
1419         }
1420
1421         // maybe user selected metadata file instead of main .bin ..
1422         bin_filename = GetIsoFile();
1423         if (cdHandle && size_main < 2352 * 0x10) {
1424                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1425                 FILE *tmpf = NULL;
1426                 size_t i;
1427                 char *p;
1428
1429                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1430                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1431                 if (strlen(alt_bin_filename) >= 4) {
1432                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1433                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1434                                 strcpy(p, exts[i]);
1435                                 tmpf = fopen(alt_bin_filename, "rb");
1436                                 if (tmpf != NULL)
1437                                         break;
1438                         }
1439                 }
1440                 if (tmpf != NULL) {
1441                         bin_filename = alt_bin_filename;
1442                         fclose(cdHandle);
1443                         cdHandle = tmpf;
1444                         size_main = get_size(cdHandle);
1445                 }
1446         }
1447
1448         // guess whether it is mode1/2048
1449         if (cdHandle && cdimg_read_func == cdread_normal && size_main % 2048 == 0) {
1450                 unsigned int modeTest = 0;
1451                 if (!fread(&modeTest, sizeof(modeTest), 1, cdHandle)) {
1452                         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
1453                 }
1454                 if (SWAP32(modeTest) != 0xffffff00) {
1455                         strcat(image_str, "[2048]");
1456                         isMode1ISO = TRUE;
1457                 }
1458         }
1459
1460         SysPrintf("%s.\n", image_str);
1461
1462         PrintTracks();
1463
1464         if (subChanMixed && cdimg_read_func == cdread_normal) {
1465                 cdimg_read_func = cdread_sub_mixed;
1466                 cdimg_read_sub_func = cdread_sub_sub_mixed;
1467         }
1468         else if (isMode1ISO) {
1469                 cdimg_read_func = cdread_2048;
1470                 cdimg_read_sub_func = NULL;
1471         }
1472
1473         return 0;
1474 }
1475
1476 static long CALLBACK ISOclose(void) {
1477         int i;
1478
1479         if (cdHandle != NULL) {
1480                 fclose(cdHandle);
1481                 cdHandle = NULL;
1482         }
1483         if (subHandle != NULL) {
1484                 fclose(subHandle);
1485                 subHandle = NULL;
1486         }
1487         cddaHandle = NULL;
1488
1489         if (compr_img != NULL) {
1490                 free(compr_img->index_table);
1491                 free(compr_img);
1492                 compr_img = NULL;
1493         }
1494
1495 #ifdef HAVE_CHD
1496         if (chd_img != NULL) {
1497                 chd_close(chd_img->chd);
1498                 free(chd_img->buffer);
1499                 free(chd_img);
1500                 chd_img = NULL;
1501         }
1502 #endif
1503
1504         for (i = 1; i <= numtracks; i++) {
1505                 if (ti[i].handle != NULL) {
1506                         fclose(ti[i].handle);
1507                         ti[i].handle = NULL;
1508                 }
1509         }
1510         numtracks = 0;
1511         ti[1].type = 0;
1512         UnloadSBI();
1513
1514         memset(cdbuffer, 0, sizeof(cdbuffer));
1515         CDR_getBuffer = ISOgetBuffer;
1516
1517         return 0;
1518 }
1519
1520 static long CALLBACK ISOinit(void) {
1521         assert(cdHandle == NULL);
1522         assert(subHandle == NULL);
1523
1524         return 0; // do nothing
1525 }
1526
1527 static long CALLBACK ISOshutdown(void) {
1528         ISOclose();
1529         return 0;
1530 }
1531
1532 // return Starting and Ending Track
1533 // buffer:
1534 //  byte 0 - start track
1535 //  byte 1 - end track
1536 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1537         buffer[0] = 1;
1538
1539         if (numtracks > 0) {
1540                 buffer[1] = numtracks;
1541         }
1542         else {
1543                 buffer[1] = 1;
1544         }
1545
1546         return 0;
1547 }
1548
1549 // return Track Time
1550 // buffer:
1551 //  byte 0 - frame
1552 //  byte 1 - second
1553 //  byte 2 - minute
1554 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1555         if (track == 0) {
1556                 unsigned int sect;
1557                 unsigned char time[3];
1558                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1559                 sec2msf(sect, (char *)time);
1560                 buffer[2] = time[0];
1561                 buffer[1] = time[1];
1562                 buffer[0] = time[2];
1563         }
1564         else if (numtracks > 0 && track <= numtracks) {
1565                 buffer[2] = ti[track].start[0];
1566                 buffer[1] = ti[track].start[1];
1567                 buffer[0] = ti[track].start[2];
1568         }
1569         else {
1570                 buffer[2] = 0;
1571                 buffer[1] = 2;
1572                 buffer[0] = 0;
1573         }
1574
1575         return 0;
1576 }
1577
1578 // decode 'raw' subchannel data ripped by cdrdao
1579 static void DecodeRawSubData(void) {
1580         unsigned char subQData[12];
1581         int i;
1582
1583         memset(subQData, 0, sizeof(subQData));
1584
1585         for (i = 0; i < 8 * 12; i++) {
1586                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1587                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1588                 }
1589         }
1590
1591         memcpy(&subbuffer[12], subQData, 12);
1592 }
1593
1594 // read track
1595 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1596 // uses bcd format
1597 static boolean CALLBACK ISOreadTrack(unsigned char *time) {
1598         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1599         long ret;
1600
1601         if (!cdHandle && !chd_img)
1602                 return 0;
1603
1604         if (pregapOffset && sector >= pregapOffset)
1605                 sector -= 2 * 75;
1606
1607         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1608         if (ret < 12*2 + 2048)
1609                 return 0;
1610
1611         return 1;
1612 }
1613
1614 // plays cdda audio
1615 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1616 // does NOT uses bcd format
1617 static long CALLBACK ISOplay(unsigned char *time) {
1618         return 0;
1619 }
1620
1621 // stops cdda audio
1622 static long CALLBACK ISOstop(void) {
1623         return 0;
1624 }
1625
1626 // gets subchannel data
1627 static unsigned char* CALLBACK ISOgetBufferSub(int sector) {
1628         if (pregapOffset && sector >= pregapOffset) {
1629                 sector -= 2 * 75;
1630                 if (sector < pregapOffset) // ?
1631                         return NULL;
1632         }
1633
1634         if (cdimg_read_sub_func != NULL) {
1635                 if (cdimg_read_sub_func(cdHandle, sector) != SUB_FRAMESIZE)
1636                         return NULL;
1637         }
1638         else if (subHandle != NULL) {
1639                 if (fseeko(subHandle, sector * SUB_FRAMESIZE, SEEK_SET))
1640                         return NULL;
1641                 if (fread(subbuffer, 1, SUB_FRAMESIZE, subHandle) != SUB_FRAMESIZE)
1642                         return NULL;
1643         }
1644         else {
1645                 return NULL;
1646         }
1647
1648         if (subChanRaw) DecodeRawSubData();
1649         return subbuffer;
1650 }
1651
1652 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1653         CDR__getStatus(stat);
1654
1655         // BIOS - boot ID (CD type)
1656         stat->Type = ti[1].type;
1657
1658         return 0;
1659 }
1660
1661 // read CDDA sector into buffer
1662 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1663         unsigned char msf[3] = {m, s, f};
1664         unsigned int track, track_start = 0;
1665         FILE *handle = cdHandle;
1666         unsigned int cddaCurPos;
1667         int ret;
1668
1669         cddaCurPos = msf2sec((char *)msf);
1670
1671         // find current track index
1672         for (track = numtracks; ; track--) {
1673                 track_start = msf2sec(ti[track].start);
1674                 if (track_start <= cddaCurPos)
1675                         break;
1676                 if (track == 1)
1677                         break;
1678         }
1679
1680         // data tracks play silent
1681         if (ti[track].type != CDDA) {
1682                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1683                 return 0;
1684         }
1685
1686         if (multifile) {
1687                 // find the file that contains this track
1688                 unsigned int file;
1689                 for (file = track; file > 1; file--) {
1690                         if (ti[file].handle != NULL) {
1691                                 handle = ti[file].handle;
1692                                 break;
1693                         }
1694                 }
1695         }
1696         if (!handle && !chd_img) {
1697                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1698                 return -1;
1699         }
1700
1701         ret = cdimg_read_func(handle, ti[track].start_offset,
1702                 buffer, cddaCurPos - track_start);
1703         if (ret != CD_FRAMESIZE_RAW) {
1704                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1705                 return -1;
1706         }
1707
1708         if (cddaBigEndian) {
1709                 int i;
1710                 unsigned char tmp;
1711
1712                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1713                         tmp = buffer[i * 2];
1714                         buffer[i * 2] = buffer[i * 2 + 1];
1715                         buffer[i * 2 + 1] = tmp;
1716                 }
1717         }
1718
1719         return 0;
1720 }
1721
1722 void cdrIsoInit(void) {
1723         CDR_init = ISOinit;
1724         CDR_shutdown = ISOshutdown;
1725         CDR_open = ISOopen;
1726         CDR_close = ISOclose;
1727         CDR_getTN = ISOgetTN;
1728         CDR_getTD = ISOgetTD;
1729         CDR_readTrack = ISOreadTrack;
1730         CDR_getBuffer = ISOgetBuffer;
1731         CDR_play = ISOplay;
1732         CDR_stop = ISOstop;
1733         CDR_getBufferSub = ISOgetBufferSub;
1734         CDR_getStatus = ISOgetStatus;
1735         CDR_readCDDA = ISOreadCDDA;
1736
1737         CDR_getDriveLetter = CDR__getDriveLetter;
1738         CDR_configure = CDR__configure;
1739         CDR_test = CDR__test;
1740         CDR_about = CDR__about;
1741         CDR_setfilename = CDR__setfilename;
1742         CDR_prefetch = CDR__prefetch;
1743
1744         numtracks = 0;
1745 }
1746
1747 int cdrIsoActive(void) {
1748         return (cdHandle || chd_img);
1749 }