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 playing = FALSE;
  64 static boolean cddaBigEndian = FALSE;
  65 /* Frame offset into CD image where pregap data would be found if it was there.
  66  * If a game seeks there we must *not* return subchannel data since it's
  67  * not in the CD image, so that cdrom code can fake subchannel data instead.
  68  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  69 static unsigned int pregapOffset;
  70
  71 static unsigned int cddaCurPos;
  72
  73 // compressed image stuff
  74 static struct {
  75         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  76         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  77         off_t *index_table;
  78         unsigned int index_len;
  79         unsigned int block_shift;
  80         unsigned int current_block;
  81         unsigned int sector_in_blk;
  82 } *compr_img;
  83
  84 #ifdef HAVE_CHD
  85 static struct {
  86         unsigned char *buffer;
  87         chd_file* chd;
  88         const chd_header* header;
  89         unsigned int sectors_per_hunk;
  90         unsigned int current_hunk[2];
  91         unsigned int current_buffer;
  92         unsigned int sector_in_hunk;
  93 } *chd_img;
  94 #else
  95 #define chd_img 0
  96 #endif
  97
  98 static int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
  99 static int (*cdimg_read_sub_func)(FILE *f, int sector);
 100
 101 char* CALLBACK CDR__getDriveLetter(void);
 102 long CALLBACK CDR__configure(void);
 103 long CALLBACK CDR__test(void);
 104 void CALLBACK CDR__about(void);
 105 long CALLBACK CDR__setfilename(char *filename);
 106
 107 static void DecodeRawSubData(void);
 108
 109 struct trackinfo {
 110         enum {DATA=1, CDDA} type;
 111         char start[3];          // MSF-format
 112         char length[3];         // MSF-format
 113         FILE *handle;           // for multi-track images CDDA
 114         unsigned int start_offset; // byte offset from start of above file (chd: sector offset)
 115 };
 116
 117 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 118
 119 static int numtracks = 0;
 120 static struct trackinfo ti[MAXTRACKS];
 121
 122 // get a sector from a msf-array
 123 static unsigned int msf2sec(char *msf) {
 124         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 125 }
 126
 127 static void sec2msf(unsigned int s, char *msf) {
 128         msf[0] = s / 75 / 60;
 129         s = s - msf[0] * 75 * 60;
 130         msf[1] = s / 75;
 131         s = s - msf[1] * 75;
 132         msf[2] = s;
 133 }
 134
 135 // divide a string of xx:yy:zz into m, s, f
 136 static void tok2msf(char *time, char *msf) {
 137         char *token;
 138
 139         token = strtok(time, ":");
 140         if (token) {
 141                 msf[0] = atoi(token);
 142         }
 143         else {
 144                 msf[0] = 0;
 145         }
 146
 147         token = strtok(NULL, ":");
 148         if (token) {
 149                 msf[1] = atoi(token);
 150         }
 151         else {
 152                 msf[1] = 0;
 153         }
 154
 155         token = strtok(NULL, ":");
 156         if (token) {
 157                 msf[2] = atoi(token);
 158         }
 159         else {
 160                 msf[2] = 0;
 161         }
 162 }
 163
 164 static off_t get_size(FILE *f)
 165 {
 166         off_t old, size;
 167 #if !defined(USE_LIBRETRO_VFS)
 168         struct stat st;
 169         if (fstat(fileno(f), &st) == 0)
 170                 return st.st_size;
 171 #endif
 172         old = ftello(f);
 173         fseeko(f, 0, SEEK_END);
 174         size = ftello(f);
 175         fseeko(f, old, SEEK_SET);
 176         return size;
 177 }
 178
 179 // this function tries to get the .toc file of the given .bin
 180 // the necessary data is put into the ti (trackinformation)-array
 181 static int parsetoc(const char *isofile) {
 182         char                    tocname[MAXPATHLEN];
 183         FILE                    *fi;
 184         char                    linebuf[256], tmp[256], name[256];
 185         char                    *token;
 186         char                    time[20], time2[20];
 187         unsigned int    t, sector_offs, sector_size;
 188         unsigned int    current_zero_gap = 0;
 189
 190         numtracks = 0;
 191
 192         // copy name of the iso and change extension from .bin to .toc
 193         strncpy(tocname, isofile, sizeof(tocname));
 194         tocname[MAXPATHLEN - 1] = '\0';
 195         if (strlen(tocname) >= 4) {
 196                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 197         }
 198         else {
 199                 return -1;
 200         }
 201
 202         if ((fi = fopen(tocname, "r")) == NULL) {
 203                 // try changing extension to .cue (to satisfy some stupid tutorials)
 204                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 205                 if ((fi = fopen(tocname, "r")) == NULL) {
 206                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 207                         strcpy(tocname, isofile);
 208                         t = strlen(tocname);
 209                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 210                                 tocname[t - 4] = '\0';
 211                                 if ((fi = fopen(tocname, "r")) == NULL) {
 212                                         return -1;
 213                                 }
 214                         }
 215                         else {
 216                                 return -1;
 217                         }
 218                 }
 219                 // check if it's really a TOC named as a .cue
 220                 if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 221                 token = strtok(linebuf, " ");
 222                 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 223                         fclose(fi);
 224                         return -1;
 225                 }
 226                 }
 227                 fseek(fi, 0, SEEK_SET);
 228         }
 229
 230         memset(&ti, 0, sizeof(ti));
 231         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 232
 233         sector_size = CD_FRAMESIZE_RAW;
 234         sector_offs = 2 * 75;
 235
 236         // parse the .toc file
 237         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 238                 // search for tracks
 239                 strncpy(tmp, linebuf, sizeof(linebuf));
 240                 token = strtok(tmp, " ");
 241
 242                 if (token == NULL) continue;
 243
 244                 if (!strcmp(token, "TRACK")) {
 245                         sector_offs += current_zero_gap;
 246                         current_zero_gap = 0;
 247
 248                         // get type of track
 249                         token = strtok(NULL, " ");
 250                         numtracks++;
 251
 252                         if (!strncmp(token, "MODE2_RAW", 9)) {
 253                                 ti[numtracks].type = DATA;
 254                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 255
 256                                 // check if this image contains mixed subchannel data
 257                                 token = strtok(NULL, " ");
 258                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 259                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 260                                         subChanMixed = TRUE;
 261                                         if (!strncmp(token, "RW_RAW", 6))
 262                                                 subChanRaw = TRUE;
 263                                 }
 264                         }
 265                         else if (!strncmp(token, "AUDIO", 5)) {
 266                                 ti[numtracks].type = CDDA;
 267                         }
 268                 }
 269                 else if (!strcmp(token, "DATAFILE")) {
 270                         if (ti[numtracks].type == CDDA) {
 271                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 272                                 ti[numtracks].start_offset = t;
 273                                 t = t / sector_size + sector_offs;
 274                                 sec2msf(t, (char *)&ti[numtracks].start);
 275                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 276                         }
 277                         else {
 278                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 279                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 280                         }
 281                 }
 282                 else if (!strcmp(token, "FILE")) {
 283                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 284                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 285                         t += msf2sec(ti[numtracks].start) * sector_size;
 286                         ti[numtracks].start_offset = t;
 287                         t = t / sector_size + sector_offs;
 288                         sec2msf(t, (char *)&ti[numtracks].start);
 289                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 290                 }
 291                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 292                         // skip unneeded optional fields
 293                         while (token != NULL) {
 294                                 token = strtok(NULL, " ");
 295                                 if (strchr(token, ':') != NULL)
 296                                         break;
 297                         }
 298                         if (token != NULL) {
 299                                 tok2msf(token, tmp);
 300                                 current_zero_gap = msf2sec(tmp);
 301                         }
 302                         if (numtracks > 1) {
 303                                 t = ti[numtracks - 1].start_offset;
 304                                 t /= sector_size;
 305                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 306                         }
 307                 }
 308                 else if (!strcmp(token, "START")) {
 309                         token = strtok(NULL, " ");
 310                         if (token != NULL && strchr(token, ':')) {
 311                                 tok2msf(token, tmp);
 312                                 t = msf2sec(tmp);
 313                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 314                                 t = msf2sec(ti[numtracks].start) + t;
 315                                 sec2msf(t, (char *)&ti[numtracks].start);
 316                         }
 317                 }
 318         }
 319
 320         fclose(fi);
 321
 322         return 0;
 323 }
 324
 325 // this function tries to get the .cue file of the given .bin
 326 // the necessary data is put into the ti (trackinformation)-array
 327 static int parsecue(const char *isofile) {
 328         char                    cuename[MAXPATHLEN];
 329         char                    filepath[MAXPATHLEN];
 330         char                    *incue_fname;
 331         FILE                    *fi;
 332         FILE                    *ftmp = NULL;
 333         char                    *token;
 334         char                    time[20];
 335         char                    *tmp;
 336         char                    linebuf[256], tmpb[256], dummy[256];
 337         unsigned int    incue_max_len;
 338         unsigned int    t, file_len, mode, sector_offs;
 339         unsigned int    sector_size = 2352;
 340
 341         numtracks = 0;
 342
 343         // copy name of the iso and change extension from .bin to .cue
 344         strncpy(cuename, isofile, sizeof(cuename));
 345         cuename[MAXPATHLEN - 1] = '\0';
 346         if (strlen(cuename) < 4)
 347                 return -1;
 348         if (strcasecmp(cuename + strlen(cuename) - 4, ".cue") == 0) {
 349                 // it's already open as cdHandle
 350                 fi = cdHandle;
 351         }
 352         else {
 353                 // If 'isofile' is a '.cd<X>' file, use it as a .cue file
 354                 //  and don't try to search the additional .cue file
 355                 if (strncasecmp(cuename + strlen(cuename) - 4, ".cd", 3) != 0 )
 356                         strcpy(cuename + strlen(cuename) - 4, ".cue");
 357
 358                 if ((ftmp = fopen(cuename, "r")) == NULL)
 359                         return -1;
 360                 fi = ftmp;
 361         }
 362
 363         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 364         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 365         // that...
 366         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 367                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 368                         // Don't proceed further, as this is actually a .toc file rather
 369                         // than a .cue file.
 370                         if (ftmp)
 371                                 fclose(ftmp);
 372                         return parsetoc(isofile);
 373                 }
 374                 rewind(fi);
 375         }
 376
 377         // build a path for files referenced in .cue
 378         strncpy(filepath, cuename, sizeof(filepath));
 379         tmp = strrchr(filepath, '/');
 380         if (tmp == NULL)
 381                 tmp = strrchr(filepath, '\\');
 382         if (tmp != NULL)
 383                 tmp++;
 384         else
 385                 tmp = filepath;
 386         *tmp = 0;
 387         filepath[sizeof(filepath) - 1] = 0;
 388         incue_fname = tmp;
 389         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 390
 391         memset(&ti, 0, sizeof(ti));
 392
 393         file_len = 0;
 394         sector_offs = 2 * 75;
 395
 396         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 397                 strncpy(dummy, linebuf, sizeof(linebuf));
 398                 token = strtok(dummy, " ");
 399
 400                 if (token == NULL) {
 401                         continue;
 402                 }
 403
 404                 if (!strcmp(token, "TRACK")) {
 405                         numtracks++;
 406
 407                         sector_size = 0;
 408                         if (strstr(linebuf, "AUDIO") != NULL) {
 409                                 ti[numtracks].type = CDDA;
 410                                 sector_size = 2352;
 411                         }
 412                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 413                                 ti[numtracks].type = DATA;
 414                         else {
 415                                 SysPrintf(".cue: failed to parse TRACK\n");
 416                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 417                         }
 418                         if (sector_size == 0)
 419                                 sector_size = 2352;
 420                 }
 421                 else if (!strcmp(token, "INDEX")) {
 422                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 423                                 SysPrintf(".cue: failed to parse INDEX\n");
 424                         tok2msf(time, (char *)&ti[numtracks].start);
 425
 426                         t = msf2sec(ti[numtracks].start);
 427                         ti[numtracks].start_offset = t * sector_size;
 428                         t += sector_offs;
 429                         sec2msf(t, ti[numtracks].start);
 430
 431                         // default track length to file length
 432                         t = file_len - ti[numtracks].start_offset / sector_size;
 433                         sec2msf(t, ti[numtracks].length);
 434
 435                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 436                                 // this track uses the same file as the last,
 437                                 // start of this track is last track's end
 438                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 439                                 sec2msf(t, ti[numtracks - 1].length);
 440                         }
 441                         if (numtracks > 1 && pregapOffset == -1)
 442                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 443                 }
 444                 else if (!strcmp(token, "PREGAP")) {
 445                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 446                                 tok2msf(time, dummy);
 447                                 sector_offs += msf2sec(dummy);
 448                         }
 449                         pregapOffset = -1; // mark to fill track start_offset
 450                 }
 451                 else if (!strcmp(token, "FILE")) {
 452                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 453                         if (t != 1)
 454                                 sscanf(linebuf, " FILE %255s", tmpb);
 455
 456                         // absolute path?
 457                         ti[numtracks + 1].handle = fopen(tmpb, "rb");
 458                         if (ti[numtracks + 1].handle == NULL) {
 459                                 // relative to .cue?
 460                                 tmp = strrchr(tmpb, '\\');
 461                                 if (tmp == NULL)
 462                                         tmp = strrchr(tmpb, '/');
 463                                 if (tmp != NULL)
 464                                         tmp++;
 465                                 else
 466                                         tmp = tmpb;
 467                                 strncpy(incue_fname, tmp, incue_max_len);
 468                                 ti[numtracks + 1].handle = fopen(filepath, "rb");
 469                         }
 470
 471                         // update global offset if this is not first file in this .cue
 472                         if (numtracks + 1 > 1) {
 473                                 multifile = 1;
 474                                 sector_offs += file_len;
 475                         }
 476
 477                         file_len = 0;
 478                         if (ti[numtracks + 1].handle == NULL) {
 479                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 480                                 continue;
 481                         }
 482                         file_len = get_size(ti[numtracks + 1].handle) / 2352;
 483                 }
 484         }
 485
 486         if (ftmp)
 487                 fclose(ftmp);
 488
 489         // if there are no tracks detected, then it's not a cue file
 490         if (!numtracks)
 491                 return -1;
 492
 493         // the data track handle is always in cdHandle
 494         if (ti[1].handle) {
 495                 fclose(cdHandle);
 496                 cdHandle = ti[1].handle;
 497                 ti[1].handle = NULL;
 498         }
 499         return 0;
 500 }
 501
 502 // this function tries to get the .ccd file of the given .img
 503 // the necessary data is put into the ti (trackinformation)-array
 504 static int parseccd(const char *isofile) {
 505         char                    ccdname[MAXPATHLEN];
 506         FILE                    *fi;
 507         char                    linebuf[256];
 508         unsigned int    t;
 509
 510         numtracks = 0;
 511
 512         // copy name of the iso and change extension from .img to .ccd
 513         strncpy(ccdname, isofile, sizeof(ccdname));
 514         ccdname[MAXPATHLEN - 1] = '\0';
 515         if (strlen(ccdname) >= 4) {
 516                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 517         }
 518         else {
 519                 return -1;
 520         }
 521
 522         if ((fi = fopen(ccdname, "r")) == NULL) {
 523                 return -1;
 524         }
 525
 526         memset(&ti, 0, sizeof(ti));
 527
 528         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 529                 if (!strncmp(linebuf, "[TRACK", 6)){
 530                         numtracks++;
 531                 }
 532                 else if (!strncmp(linebuf, "MODE=", 5)) {
 533                         sscanf(linebuf, "MODE=%d", &t);
 534                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 535                 }
 536                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 537                         sscanf(linebuf, "INDEX 1=%d", &t);
 538                         sec2msf(t + 2 * 75, ti[numtracks].start);
 539                         ti[numtracks].start_offset = t * 2352;
 540
 541                         // If we've already seen another track, this is its end
 542                         if (numtracks > 1) {
 543                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 544                                 sec2msf(t, ti[numtracks - 1].length);
 545                         }
 546                 }
 547         }
 548
 549         fclose(fi);
 550
 551         // Fill out the last track's end based on size
 552         if (numtracks >= 1) {
 553                 t = get_size(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 554                 sec2msf(t, ti[numtracks].length);
 555         }
 556
 557         return 0;
 558 }
 559
 560 // this function tries to get the .mds file of the given .mdf
 561 // the necessary data is put into the ti (trackinformation)-array
 562 static int parsemds(const char *isofile) {
 563         char                    mdsname[MAXPATHLEN];
 564         FILE                    *fi;
 565         unsigned int    offset, extra_offset, l, i;
 566         unsigned short  s;
 567
 568         numtracks = 0;
 569
 570         // copy name of the iso and change extension from .mdf to .mds
 571         strncpy(mdsname, isofile, sizeof(mdsname));
 572         mdsname[MAXPATHLEN - 1] = '\0';
 573         if (strlen(mdsname) >= 4) {
 574                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 575         }
 576         else {
 577                 return -1;
 578         }
 579
 580         if ((fi = fopen(mdsname, "rb")) == NULL) {
 581                 return -1;
 582         }
 583
 584         memset(&ti, 0, sizeof(ti));
 585
 586         // check if it's a valid mds file
 587         if (fread(&i, 1, sizeof(i), fi) != sizeof(i))
 588                 goto fail_io;
 589         i = SWAP32(i);
 590         if (i != 0x4944454D) {
 591                 // not an valid mds file
 592                 fclose(fi);
 593                 return -1;
 594         }
 595
 596         // get offset to session block
 597         fseek(fi, 0x50, SEEK_SET);
 598         if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
 599                 goto fail_io;
 600         offset = SWAP32(offset);
 601
 602         // get total number of tracks
 603         offset += 14;
 604         fseek(fi, offset, SEEK_SET);
 605         if (fread(&s, 1, sizeof(s), fi) != sizeof(s))
 606                 goto fail_io;
 607         s = SWAP16(s);
 608         numtracks = s;
 609
 610         // get offset to track blocks
 611         fseek(fi, 4, SEEK_CUR);
 612         if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
 613                 goto fail_io;
 614         offset = SWAP32(offset);
 615
 616         // skip lead-in data
 617         while (1) {
 618                 fseek(fi, offset + 4, SEEK_SET);
 619                 if (fgetc(fi) < 0xA0) {
 620                         break;
 621                 }
 622                 offset += 0x50;
 623         }
 624
 625         // check if the image contains mixed subchannel data
 626         fseek(fi, offset + 1, SEEK_SET);
 627         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 628
 629         // read track data
 630         for (i = 1; i <= numtracks; i++) {
 631                 fseek(fi, offset, SEEK_SET);
 632
 633                 // get the track type
 634                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 635                 fseek(fi, 8, SEEK_CUR);
 636
 637                 // get the track starting point
 638                 ti[i].start[0] = fgetc(fi);
 639                 ti[i].start[1] = fgetc(fi);
 640                 ti[i].start[2] = fgetc(fi);
 641
 642                 if (fread(&extra_offset, 1, sizeof(extra_offset), fi) != sizeof(extra_offset))
 643                         goto fail_io;
 644                 extra_offset = SWAP32(extra_offset);
 645
 646                 // get track start offset (in .mdf)
 647                 fseek(fi, offset + 0x28, SEEK_SET);
 648                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
 649                         goto fail_io;
 650                 l = SWAP32(l);
 651                 ti[i].start_offset = l;
 652
 653                 // get pregap
 654                 fseek(fi, extra_offset, SEEK_SET);
 655                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
 656                         goto fail_io;
 657                 l = SWAP32(l);
 658                 if (l != 0 && i > 1)
 659                         pregapOffset = msf2sec(ti[i].start);
 660
 661                 // get the track length
 662                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
 663                         goto fail_io;
 664                 l = SWAP32(l);
 665                 sec2msf(l, ti[i].length);
 666
 667                 offset += 0x50;
 668         }
 669         fclose(fi);
 670         return 0;
 671 fail_io:
 672 #ifndef NDEBUG
 673         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
 674 #endif
 675         fclose(fi);
 676         return -1;
 677 }
 678
 679 static int handlepbp(const char *isofile) {
 680         struct {
 681                 unsigned int sig;
 682                 unsigned int dontcare[8];
 683                 unsigned int psar_offs;
 684         } pbp_hdr;
 685         struct {
 686                 unsigned char type;
 687                 unsigned char pad0;
 688                 unsigned char track;
 689                 char index0[3];
 690                 char pad1;
 691                 char index1[3];
 692         } toc_entry;
 693         struct {
 694                 unsigned int offset;
 695                 unsigned int size;
 696                 unsigned int dontcare[6];
 697         } index_entry;
 698         char psar_sig[11];
 699         off_t psisoimg_offs, cdimg_base;
 700         unsigned int t, cd_length;
 701         unsigned int offsettab[8];
 702         unsigned int psar_offs, index_entry_size, index_entry_offset;
 703         const char *ext = NULL;
 704         int i, ret;
 705
 706         if (strlen(isofile) >= 4)
 707                 ext = isofile + strlen(isofile) - 4;
 708         if (ext == NULL || strcasecmp(ext, ".pbp") != 0)
 709                 return -1;
 710
 711         numtracks = 0;
 712
 713         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 714         if (ret != sizeof(pbp_hdr)) {
 715                 SysPrintf("failed to read pbp\n");
 716                 goto fail_io;
 717         }
 718
 719         psar_offs = SWAP32(pbp_hdr.psar_offs);
 720
 721         ret = fseeko(cdHandle, psar_offs, SEEK_SET);
 722         if (ret != 0) {
 723                 SysPrintf("failed to seek to %x\n", psar_offs);
 724                 goto fail_io;
 725         }
 726
 727         psisoimg_offs = psar_offs;
 728         if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
 729                 goto fail_io;
 730         psar_sig[10] = 0;
 731         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 732                 // multidisk image?
 733                 ret = fseeko(cdHandle, psar_offs + 0x200, SEEK_SET);
 734                 if (ret != 0) {
 735                         SysPrintf("failed to seek to %x\n", psar_offs + 0x200);
 736                         goto fail_io;
 737                 }
 738
 739                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 740                         SysPrintf("failed to read offsettab\n");
 741                         goto fail_io;
 742                 }
 743
 744                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 745                         if (offsettab[i] == 0)
 746                                 break;
 747                 }
 748                 cdrIsoMultidiskCount = i;
 749                 if (cdrIsoMultidiskCount == 0) {
 750                         SysPrintf("multidisk eboot has 0 images?\n");
 751                         goto fail_io;
 752                 }
 753
 754                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 755                         cdrIsoMultidiskSelect = 0;
 756
 757                 psisoimg_offs += SWAP32(offsettab[cdrIsoMultidiskSelect]);
 758
 759                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 760                 if (ret != 0) {
 761                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 762                         goto fail_io;
 763                 }
 764
 765                 if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
 766                         goto fail_io;
 767                 psar_sig[10] = 0;
 768         }
 769
 770         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 771                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 772                 goto fail_io;
 773         }
 774
 775         // seek to TOC
 776         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 777         if (ret != 0) {
 778                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 779                 goto fail_io;
 780         }
 781
 782         // first 3 entries are special
 783         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 784         if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
 785                 goto fail_io;
 786         numtracks = btoi(toc_entry.index1[0]);
 787
 788         if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
 789                 goto fail_io;
 790         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 791                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 792
 793         for (i = 1; i <= numtracks; i++) {
 794                 if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
 795                         goto fail_io;
 796
 797                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 798
 799                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 800                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 801                 ti[i].start_offset *= 2352;
 802                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 803                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 804                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 805
 806                 if (i > 1) {
 807                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 808                         sec2msf(t, ti[i - 1].length);
 809                 }
 810         }
 811         t = cd_length - ti[numtracks].start_offset / 2352;
 812         sec2msf(t, ti[numtracks].length);
 813
 814         // seek to ISO index
 815         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 816         if (ret != 0) {
 817                 SysPrintf("failed to seek to ISO index\n");
 818                 goto fail_io;
 819         }
 820
 821         compr_img = calloc(1, sizeof(*compr_img));
 822         if (compr_img == NULL)
 823                 goto fail_io;
 824
 825         compr_img->block_shift = 4;
 826         compr_img->current_block = (unsigned int)-1;
 827
 828         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 829         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 830         if (compr_img->index_table == NULL)
 831                 goto fail_io;
 832
 833         cdimg_base = psisoimg_offs + 0x100000;
 834         for (i = 0; i < compr_img->index_len; i++) {
 835                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 836                 if (ret != sizeof(index_entry)) {
 837                         SysPrintf("failed to read index_entry #%d\n", i);
 838                         goto fail_index;
 839                 }
 840
 841                 index_entry_size = SWAP32(index_entry.size);
 842                 index_entry_offset = SWAP32(index_entry.offset);
 843
 844                 if (index_entry_size == 0)
 845                         break;
 846
 847                 compr_img->index_table[i] = cdimg_base + index_entry_offset;
 848         }
 849         compr_img->index_table[i] = cdimg_base + index_entry_offset + index_entry_size;
 850
 851         return 0;
 852
 853 fail_index:
 854         free(compr_img->index_table);
 855         compr_img->index_table = NULL;
 856         goto done;
 857
 858 fail_io:
 859         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
 860         rewind(cdHandle);
 861
 862 done:
 863         if (compr_img != NULL) {
 864                 free(compr_img);
 865                 compr_img = NULL;
 866         }
 867         return -1;
 868 }
 869
 870 static int handlecbin(const char *isofile) {
 871         struct
 872         {
 873                 char magic[4];
 874                 unsigned int header_size;
 875                 unsigned long long total_bytes;
 876                 unsigned int block_size;
 877                 unsigned char ver;              // 1
 878                 unsigned char align;
 879                 unsigned char rsv_06[2];
 880         } ciso_hdr;
 881         const char *ext = NULL;
 882         unsigned int *index_table = NULL;
 883         unsigned int index = 0, plain;
 884         int i, ret;
 885
 886         if (strlen(isofile) >= 5)
 887                 ext = isofile + strlen(isofile) - 5;
 888         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 889                 return -1;
 890
 891         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 892         if (ret != sizeof(ciso_hdr)) {
 893                 SysPrintf("failed to read ciso header\n");
 894                 goto fail_io;
 895         }
 896
 897         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 898                 SysPrintf("bad ciso header\n");
 899                 goto fail_io;
 900         }
 901         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 902                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
 903                 if (ret != 0) {
 904                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 905                         goto fail_io;
 906                 }
 907         }
 908
 909         compr_img = calloc(1, sizeof(*compr_img));
 910         if (compr_img == NULL)
 911                 goto fail_io;
 912
 913         compr_img->block_shift = 0;
 914         compr_img->current_block = (unsigned int)-1;
 915
 916         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
 917         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
 918         if (index_table == NULL)
 919                 goto fail_io;
 920
 921         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
 922         if (ret != compr_img->index_len) {
 923                 SysPrintf("failed to read index table\n");
 924                 goto fail_index;
 925         }
 926
 927         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 928         if (compr_img->index_table == NULL)
 929                 goto fail_index;
 930
 931         for (i = 0; i < compr_img->index_len + 1; i++) {
 932                 index = index_table[i];
 933                 plain = index & 0x80000000;
 934                 index &= 0x7fffffff;
 935                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
 936                 if (plain)
 937                         compr_img->index_table[i] |= OFF_T_MSB;
 938         }
 939
 940         return 0;
 941
 942 fail_index:
 943         free(index_table);
 944 fail_io:
 945         if (compr_img != NULL) {
 946                 free(compr_img);
 947                 compr_img = NULL;
 948         }
 949         rewind(cdHandle);
 950         return -1;
 951 }
 952
 953 #ifdef HAVE_CHD
 954 static int handlechd(const char *isofile) {
 955         int frame_offset = 150;
 956         int file_offset = 0;
 957
 958         chd_img = calloc(1, sizeof(*chd_img));
 959         if (chd_img == NULL)
 960                 goto fail_io;
 961
 962         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
 963                 goto fail_io;
 964
 965         if (Config.CHD_Precache && (chd_precache(chd_img->chd) != CHDERR_NONE))
 966                 goto fail_io;
 967
 968         chd_img->header = chd_get_header(chd_img->chd);
 969
 970         chd_img->buffer = malloc(chd_img->header->hunkbytes * 2);
 971         if (chd_img->buffer == NULL)
 972                 goto fail_io;
 973
 974         chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
 975         chd_img->current_hunk[0] = (unsigned int)-1;
 976         chd_img->current_hunk[1] = (unsigned int)-1;
 977
 978         cddaBigEndian = TRUE;
 979
 980         numtracks = 0;
 981         memset(ti, 0, sizeof(ti));
 982
 983         while (1)
 984         {
 985                 struct {
 986                         char type[64];
 987                         char subtype[32];
 988                         char pgtype[32];
 989                         char pgsub[32];
 990                         uint32_t track;
 991                         uint32_t frames;
 992                         uint32_t pregap;
 993                         uint32_t postgap;
 994                 } md = {};
 995                 char meta[256];
 996                 uint32_t meta_size = 0;
 997
 998                 if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
 999                         sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
1000                 else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
1001                         sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
1002                 else
1003                         break;
1004
1005                 SysPrintf("chd: %s\n", meta);
1006
1007                 if (md.track == 1) {
1008                         if (!strncmp(md.subtype, "RW", 2)) {
1009                                 subChanMixed = TRUE;
1010                                 if (!strcmp(md.subtype, "RW_RAW"))
1011                                         subChanRaw = TRUE;
1012                         }
1013                 }
1014
1015                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
1016
1017                 sec2msf(frame_offset + md.pregap, ti[md.track].start);
1018                 sec2msf(md.frames, ti[md.track].length);
1019
1020                 ti[md.track].start_offset = file_offset + md.pregap;
1021
1022                 // XXX: what about postgap?
1023                 frame_offset += md.frames;
1024                 file_offset += md.frames;
1025                 numtracks++;
1026         }
1027
1028         if (numtracks)
1029                 return 0;
1030
1031 fail_io:
1032         if (chd_img != NULL) {
1033                 free(chd_img->buffer);
1034                 free(chd_img);
1035                 chd_img = NULL;
1036         }
1037         return -1;
1038 }
1039 #endif
1040
1041 // this function tries to get the .sub file of the given .img
1042 static int opensubfile(const char *isoname) {
1043         char            subname[MAXPATHLEN];
1044
1045         // copy name of the iso and change extension from .img to .sub
1046         strncpy(subname, isoname, sizeof(subname));
1047         subname[MAXPATHLEN - 1] = '\0';
1048         if (strlen(subname) >= 4) {
1049                 strcpy(subname + strlen(subname) - 4, ".sub");
1050         }
1051         else {
1052                 return -1;
1053         }
1054
1055         subHandle = fopen(subname, "rb");
1056         if (subHandle == NULL) {
1057                 return -1;
1058         }
1059
1060         return 0;
1061 }
1062
1063 static int opensbifile(const char *isoname) {
1064         char            sbiname[MAXPATHLEN], disknum[MAXPATHLEN] = "0";
1065         int             s;
1066
1067         strncpy(sbiname, isoname, sizeof(sbiname));
1068         sbiname[MAXPATHLEN - 1] = '\0';
1069         if (strlen(sbiname) >= 4) {
1070                 if (cdrIsoMultidiskCount > 1) {
1071                         sprintf(disknum, "_%i.sbi", cdrIsoMultidiskSelect + 1);
1072                         strcpy(sbiname + strlen(sbiname) - 4, disknum);
1073                 }
1074                 else
1075                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1076         }
1077         else {
1078                 return -1;
1079         }
1080
1081         s = msf2sec(ti[1].length);
1082
1083         return LoadSBI(sbiname, s);
1084 }
1085
1086 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1087 {
1088         int ret;
1089         if (!f)
1090                 return -1;
1091         if (fseeko(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET))
1092                 goto fail_io;
1093         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1094         if (ret <= 0)
1095                 goto fail_io;
1096         return ret;
1097
1098 fail_io:
1099         // often happens in cdda gaps of a split cue/bin, so not logged
1100         //SysPrintf("File IO error %d, base %u, sector %u\n", errno, base, sector);
1101         return -1;
1102 }
1103
1104 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1105 {
1106         int ret;
1107
1108         if (!f)
1109                 return -1;
1110         if (fseeko(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET))
1111                 goto fail_io;
1112         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1113         if (ret <= 0)
1114                 goto fail_io;
1115         return ret;
1116
1117 fail_io:
1118         //SysPrintf("File IO error %d, base %u, sector %u\n", errno, base, sector);
1119         return -1;
1120 }
1121
1122 static int cdread_sub_sub_mixed(FILE *f, int sector)
1123 {
1124         if (!f)
1125                 return -1;
1126         if (fseeko(f, sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE) + CD_FRAMESIZE_RAW, SEEK_SET))
1127                 goto fail_io;
1128         if (fread(subbuffer, 1, SUB_FRAMESIZE, f) != SUB_FRAMESIZE)
1129                 goto fail_io;
1130
1131         return SUB_FRAMESIZE;
1132
1133 fail_io:
1134         SysPrintf("subchannel: file IO error %d, sector %u\n", errno, sector);
1135         return -1;
1136 }
1137
1138 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1139 {
1140         static z_stream z;
1141         int ret = 0;
1142
1143         if (z.zalloc == NULL) {
1144                 // XXX: one-time leak here..
1145                 z.next_in = Z_NULL;
1146                 z.avail_in = 0;
1147                 z.zalloc = Z_NULL;
1148                 z.zfree = Z_NULL;
1149                 z.opaque = Z_NULL;
1150                 ret = inflateInit2(&z, -15);
1151         }
1152         else
1153                 ret = inflateReset(&z);
1154         if (ret != Z_OK)
1155                 return ret;
1156
1157         z.next_in = in;
1158         z.avail_in = in_size;
1159         z.next_out = out;
1160         z.avail_out = *out_size;
1161
1162         ret = inflate(&z, Z_NO_FLUSH);
1163         //inflateEnd(&z);
1164
1165         *out_size -= z.avail_out;
1166         return ret == 1 ? 0 : ret;
1167 }
1168
1169 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1170 {
1171         unsigned long cdbuffer_size, cdbuffer_size_expect;
1172         unsigned int size;
1173         int is_compressed;
1174         off_t start_byte;
1175         int ret, block;
1176
1177         if (!cdHandle)
1178                 return -1;
1179         if (base)
1180                 sector += base / 2352;
1181
1182         block = sector >> compr_img->block_shift;
1183         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1184
1185         if (block == compr_img->current_block) {
1186                 //printf("hit sect %d\n", sector);
1187                 goto finish;
1188         }
1189
1190         if (sector >= compr_img->index_len * 16) {
1191                 SysPrintf("sector %d is past img end\n", sector);
1192                 return -1;
1193         }
1194
1195         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1196         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1197                 SysPrintf("seek error for block %d at %llx: ",
1198                         block, (long long)start_byte);
1199                 perror(NULL);
1200                 return -1;
1201         }
1202
1203         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1204         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1205         if (size > sizeof(compr_img->buff_compressed)) {
1206                 SysPrintf("block %d is too large: %u\n", block, size);
1207                 return -1;
1208         }
1209
1210         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1211                                 1, size, cdHandle) != size) {
1212                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1213                 perror(NULL);
1214                 return -1;
1215         }
1216
1217         if (is_compressed) {
1218                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1219                 cdbuffer_size = cdbuffer_size_expect;
1220                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1221                 if (ret != 0) {
1222                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1223                                         ret, block, sector);
1224                         return -1;
1225                 }
1226                 if (cdbuffer_size != cdbuffer_size_expect)
1227                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1228                                         cdbuffer_size_expect, sector);
1229         }
1230
1231         // done at last!
1232         compr_img->current_block = block;
1233
1234 finish:
1235         if (dest != cdbuffer) // copy avoid HACK
1236                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1237                         CD_FRAMESIZE_RAW);
1238         return CD_FRAMESIZE_RAW;
1239 }
1240
1241 #ifdef HAVE_CHD
1242 static unsigned char *chd_get_sector(unsigned int current_buffer, unsigned int sector_in_hunk)
1243 {
1244         return chd_img->buffer
1245                 + current_buffer * chd_img->header->hunkbytes
1246                 + sector_in_hunk * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
1247 }
1248
1249 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1250 {
1251         int hunk;
1252
1253         sector += base;
1254
1255         hunk = sector / chd_img->sectors_per_hunk;
1256         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1257
1258         if (hunk == chd_img->current_hunk[0])
1259                 chd_img->current_buffer = 0;
1260         else if (hunk == chd_img->current_hunk[1])
1261                 chd_img->current_buffer = 1;
1262         else
1263         {
1264                 chd_read(chd_img->chd, hunk, chd_img->buffer +
1265                         chd_img->current_buffer * chd_img->header->hunkbytes);
1266                 chd_img->current_hunk[chd_img->current_buffer] = hunk;
1267         }
1268
1269         if (dest != cdbuffer) // copy avoid HACK
1270                 memcpy(dest, chd_get_sector(chd_img->current_buffer, chd_img->sector_in_hunk),
1271                         CD_FRAMESIZE_RAW);
1272         return CD_FRAMESIZE_RAW;
1273 }
1274
1275 static int cdread_sub_chd(FILE *f, int sector)
1276 {
1277         unsigned int sector_in_hunk;
1278         unsigned int buffer;
1279         int hunk;
1280
1281         if (!subChanMixed)
1282                 return -1;
1283
1284         hunk = sector / chd_img->sectors_per_hunk;
1285         sector_in_hunk = sector % chd_img->sectors_per_hunk;
1286
1287         if (hunk == chd_img->current_hunk[0])
1288                 buffer = 0;
1289         else if (hunk == chd_img->current_hunk[1])
1290                 buffer = 1;
1291         else
1292         {
1293                 buffer = chd_img->current_buffer ^ 1;
1294                 chd_read(chd_img->chd, hunk, chd_img->buffer +
1295                         buffer * chd_img->header->hunkbytes);
1296                 chd_img->current_hunk[buffer] = hunk;
1297         }
1298
1299         memcpy(subbuffer, chd_get_sector(buffer, sector_in_hunk) + CD_FRAMESIZE_RAW, SUB_FRAMESIZE);
1300         return SUB_FRAMESIZE;
1301 }
1302 #endif
1303
1304 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1305 {
1306         int ret;
1307
1308         if (!f)
1309                 return -1;
1310         fseeko(f, base + sector * 2048, SEEK_SET);
1311         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1312
1313         // not really necessary, fake mode 2 header
1314         memset(cdbuffer, 0, 12 * 2);
1315         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1316         cdbuffer[12 + 3] = 1;
1317
1318         return 12*2 + ret;
1319 }
1320
1321 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1322         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1323 }
1324
1325 #ifdef HAVE_CHD
1326 static unsigned char * CALLBACK ISOgetBuffer_chd(void) {
1327         return chd_get_sector(chd_img->current_buffer, chd_img->sector_in_hunk) + 12;
1328 }
1329 #endif
1330
1331 static unsigned char * CALLBACK ISOgetBuffer(void) {
1332         return cdbuffer + 12;
1333 }
1334
1335 static void PrintTracks(void) {
1336         int i;
1337
1338         for (i = 1; i <= numtracks; i++) {
1339                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1340                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
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         playing = FALSE;
1488         cddaHandle = NULL;
1489
1490         if (compr_img != NULL) {
1491                 free(compr_img->index_table);
1492                 free(compr_img);
1493                 compr_img = NULL;
1494         }
1495
1496 #ifdef HAVE_CHD
1497         if (chd_img != NULL) {
1498                 chd_close(chd_img->chd);
1499                 free(chd_img->buffer);
1500                 free(chd_img);
1501                 chd_img = NULL;
1502         }
1503 #endif
1504
1505         for (i = 1; i <= numtracks; i++) {
1506                 if (ti[i].handle != NULL) {
1507                         fclose(ti[i].handle);
1508                         ti[i].handle = NULL;
1509                 }
1510         }
1511         numtracks = 0;
1512         ti[1].type = 0;
1513         UnloadSBI();
1514
1515         memset(cdbuffer, 0, sizeof(cdbuffer));
1516         CDR_getBuffer = ISOgetBuffer;
1517
1518         return 0;
1519 }
1520
1521 static long CALLBACK ISOinit(void) {
1522         assert(cdHandle == NULL);
1523         assert(subHandle == NULL);
1524
1525         return 0; // do nothing
1526 }
1527
1528 static long CALLBACK ISOshutdown(void) {
1529         ISOclose();
1530         return 0;
1531 }
1532
1533 // return Starting and Ending Track
1534 // buffer:
1535 //  byte 0 - start track
1536 //  byte 1 - end track
1537 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1538         buffer[0] = 1;
1539
1540         if (numtracks > 0) {
1541                 buffer[1] = numtracks;
1542         }
1543         else {
1544                 buffer[1] = 1;
1545         }
1546
1547         return 0;
1548 }
1549
1550 // return Track Time
1551 // buffer:
1552 //  byte 0 - frame
1553 //  byte 1 - second
1554 //  byte 2 - minute
1555 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1556         if (track == 0) {
1557                 unsigned int sect;
1558                 unsigned char time[3];
1559                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1560                 sec2msf(sect, (char *)time);
1561                 buffer[2] = time[0];
1562                 buffer[1] = time[1];
1563                 buffer[0] = time[2];
1564         }
1565         else if (numtracks > 0 && track <= numtracks) {
1566                 buffer[2] = ti[track].start[0];
1567                 buffer[1] = ti[track].start[1];
1568                 buffer[0] = ti[track].start[2];
1569         }
1570         else {
1571                 buffer[2] = 0;
1572                 buffer[1] = 2;
1573                 buffer[0] = 0;
1574         }
1575
1576         return 0;
1577 }
1578
1579 // decode 'raw' subchannel data ripped by cdrdao
1580 static void DecodeRawSubData(void) {
1581         unsigned char subQData[12];
1582         int i;
1583
1584         memset(subQData, 0, sizeof(subQData));
1585
1586         for (i = 0; i < 8 * 12; i++) {
1587                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1588                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1589                 }
1590         }
1591
1592         memcpy(&subbuffer[12], subQData, 12);
1593 }
1594
1595 // read track
1596 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1597 // uses bcd format
1598 static boolean CALLBACK ISOreadTrack(unsigned char *time) {
1599         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1600         long ret;
1601
1602         if (!cdHandle && !chd_img)
1603                 return 0;
1604
1605         if (pregapOffset && sector >= pregapOffset)
1606                 sector -= 2 * 75;
1607
1608         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1609         if (ret < 12*2 + 2048)
1610                 return 0;
1611
1612         return 1;
1613 }
1614
1615 // plays cdda audio
1616 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1617 // does NOT uses bcd format
1618 static long CALLBACK ISOplay(unsigned char *time) {
1619         playing = TRUE;
1620         return 0;
1621 }
1622
1623 // stops cdda audio
1624 static long CALLBACK ISOstop(void) {
1625         playing = FALSE;
1626         return 0;
1627 }
1628
1629 // gets subchannel data
1630 static unsigned char* CALLBACK ISOgetBufferSub(int sector) {
1631         if (pregapOffset && sector >= pregapOffset) {
1632                 sector -= 2 * 75;
1633                 if (sector < pregapOffset) // ?
1634                         return NULL;
1635         }
1636
1637         if (cdimg_read_sub_func != NULL) {
1638                 if (cdimg_read_sub_func(cdHandle, sector) != SUB_FRAMESIZE)
1639                         return NULL;
1640         }
1641         else if (subHandle != NULL) {
1642                 if (fseeko(subHandle, sector * SUB_FRAMESIZE, SEEK_SET))
1643                         return NULL;
1644                 if (fread(subbuffer, 1, SUB_FRAMESIZE, subHandle) != SUB_FRAMESIZE)
1645                         return NULL;
1646         }
1647         else {
1648                 return NULL;
1649         }
1650
1651         if (subChanRaw) DecodeRawSubData();
1652         return subbuffer;
1653 }
1654
1655 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1656         u32 sect;
1657
1658         CDR__getStatus(stat);
1659
1660         if (playing) {
1661                 stat->Type = 0x02;
1662                 stat->Status |= 0x80;
1663         }
1664         else {
1665                 // BIOS - boot ID (CD type)
1666                 stat->Type = ti[1].type;
1667         }
1668
1669         // relative -> absolute time
1670         sect = cddaCurPos;
1671         sec2msf(sect, (char *)stat->Time);
1672
1673         return 0;
1674 }
1675
1676 // read CDDA sector into buffer
1677 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1678         unsigned char msf[3] = {m, s, f};
1679         unsigned int track, track_start = 0;
1680         FILE *handle = cdHandle;
1681         int ret;
1682
1683         cddaCurPos = msf2sec((char *)msf);
1684
1685         // find current track index
1686         for (track = numtracks; ; track--) {
1687                 track_start = msf2sec(ti[track].start);
1688                 if (track_start <= cddaCurPos)
1689                         break;
1690                 if (track == 1)
1691                         break;
1692         }
1693
1694         // data tracks play silent
1695         if (ti[track].type != CDDA) {
1696                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1697                 return 0;
1698         }
1699
1700         if (multifile) {
1701                 // find the file that contains this track
1702                 unsigned int file;
1703                 for (file = track; file > 1; file--) {
1704                         if (ti[file].handle != NULL) {
1705                                 handle = ti[file].handle;
1706                                 break;
1707                         }
1708                 }
1709         }
1710         if (!handle && !chd_img) {
1711                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1712                 return -1;
1713         }
1714
1715         ret = cdimg_read_func(handle, ti[track].start_offset,
1716                 buffer, cddaCurPos - track_start);
1717         if (ret != CD_FRAMESIZE_RAW) {
1718                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1719                 return -1;
1720         }
1721
1722         if (cddaBigEndian) {
1723                 int i;
1724                 unsigned char tmp;
1725
1726                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1727                         tmp = buffer[i * 2];
1728                         buffer[i * 2] = buffer[i * 2 + 1];
1729                         buffer[i * 2 + 1] = tmp;
1730                 }
1731         }
1732
1733         return 0;
1734 }
1735
1736 void cdrIsoInit(void) {
1737         CDR_init = ISOinit;
1738         CDR_shutdown = ISOshutdown;
1739         CDR_open = ISOopen;
1740         CDR_close = ISOclose;
1741         CDR_getTN = ISOgetTN;
1742         CDR_getTD = ISOgetTD;
1743         CDR_readTrack = ISOreadTrack;
1744         CDR_getBuffer = ISOgetBuffer;
1745         CDR_play = ISOplay;
1746         CDR_stop = ISOstop;
1747         CDR_getBufferSub = ISOgetBufferSub;
1748         CDR_getStatus = ISOgetStatus;
1749         CDR_readCDDA = ISOreadCDDA;
1750
1751         CDR_getDriveLetter = CDR__getDriveLetter;
1752         CDR_configure = CDR__configure;
1753         CDR_test = CDR__test;
1754         CDR_about = CDR__about;
1755         CDR_setfilename = CDR__setfilename;
1756
1757         numtracks = 0;
1758 }
1759
1760 int cdrIsoActive(void) {
1761         return (cdHandle || chd_img);
1762 }