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 WIN32_LEAN_AND_MEAN
  30 #include <process.h>
  31 #include <windows.h>
  32 #define strcasecmp _stricmp
  33 #define usleep(x) Sleep((x) / 1000)
  34 #else
  35 #include <pthread.h>
  36 #include <sys/time.h>
  37 #include <unistd.h>
  38 #endif
  39 #include <errno.h>
  40 #include <zlib.h>
  41
  42 #ifdef HAVE_CHD
  43 #include "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 static boolean subChanMissing = FALSE;
  58
  59 static boolean multifile = FALSE;
  60
  61 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
  62 static unsigned char subbuffer[SUB_FRAMESIZE];
  63
  64 static boolean playing = FALSE;
  65 static boolean cddaBigEndian = FALSE;
  66 /* Frame offset into CD image where pregap data would be found if it was there.
  67  * If a game seeks there we must *not* return subchannel data since it's
  68  * not in the CD image, so that cdrom code can fake subchannel data instead.
  69  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  70 static unsigned int pregapOffset;
  71
  72 static unsigned int cddaCurPos;
  73
  74 // compressed image stuff
  75 static struct {
  76         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  77         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  78         off_t *index_table;
  79         unsigned int index_len;
  80         unsigned int block_shift;
  81         unsigned int current_block;
  82         unsigned int sector_in_blk;
  83 } *compr_img;
  84
  85 #ifdef HAVE_CHD
  86 typedef struct {
  87         unsigned char (*buffer)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE];
  88         chd_file* chd;
  89         const chd_header* header;
  90         unsigned int sectors_per_hunk;
  91         unsigned int current_hunk;
  92         unsigned int sector_in_hunk;
  93 } CHD_IMG;
  94
  95 static CHD_IMG *chd_img;
  96 #endif
  97
  98 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
  99
 100 char* CALLBACK CDR__getDriveLetter(void);
 101 long CALLBACK CDR__configure(void);
 102 long CALLBACK CDR__test(void);
 103 void CALLBACK CDR__about(void);
 104 long CALLBACK CDR__setfilename(char *filename);
 105 long CALLBACK CDR__getStatus(struct CdrStat *stat);
 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
 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 // stop the CDDA playback
 165 static void stopCDDA() {
 166         playing = FALSE;
 167 }
 168
 169 // this function tries to get the .toc file of the given .bin
 170 // the necessary data is put into the ti (trackinformation)-array
 171 static int parsetoc(const char *isofile) {
 172         char                    tocname[MAXPATHLEN];
 173         FILE                    *fi;
 174         char                    linebuf[256], tmp[256], name[256];
 175         char                    *token;
 176         char                    time[20], time2[20];
 177         unsigned int    t, sector_offs, sector_size;
 178         unsigned int    current_zero_gap = 0;
 179
 180         numtracks = 0;
 181
 182         // copy name of the iso and change extension from .bin to .toc
 183         strncpy(tocname, isofile, sizeof(tocname));
 184         tocname[MAXPATHLEN - 1] = '\0';
 185         if (strlen(tocname) >= 4) {
 186                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 187         }
 188         else {
 189                 return -1;
 190         }
 191
 192         if ((fi = fopen(tocname, "r")) == NULL) {
 193                 // try changing extension to .cue (to satisfy some stupid tutorials)
 194                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 195                 if ((fi = fopen(tocname, "r")) == NULL) {
 196                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 197                         strcpy(tocname, isofile);
 198                         t = strlen(tocname);
 199                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 200                                 tocname[t - 4] = '\0';
 201                                 if ((fi = fopen(tocname, "r")) == NULL) {
 202                                         return -1;
 203                                 }
 204                         }
 205                         else {
 206                                 return -1;
 207                         }
 208                 }
 209                 // check if it's really a TOC named as a .cue
 210                 fgets(linebuf, sizeof(linebuf), fi);
 211                 token = strtok(linebuf, " ");
 212                 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 213                         fclose(fi);
 214                         return -1;
 215                 }
 216                 fseek(fi, 0, SEEK_SET);
 217         }
 218
 219         memset(&ti, 0, sizeof(ti));
 220         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 221
 222         sector_size = CD_FRAMESIZE_RAW;
 223         sector_offs = 2 * 75;
 224
 225         // parse the .toc file
 226         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 227                 // search for tracks
 228                 strncpy(tmp, linebuf, sizeof(linebuf));
 229                 token = strtok(tmp, " ");
 230
 231                 if (token == NULL) continue;
 232
 233                 if (!strcmp(token, "TRACK")) {
 234                         sector_offs += current_zero_gap;
 235                         current_zero_gap = 0;
 236
 237                         // get type of track
 238                         token = strtok(NULL, " ");
 239                         numtracks++;
 240
 241                         if (!strncmp(token, "MODE2_RAW", 9)) {
 242                                 ti[numtracks].type = DATA;
 243                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 244
 245                                 // check if this image contains mixed subchannel data
 246                                 token = strtok(NULL, " ");
 247                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 248                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 249                                         subChanMixed = TRUE;
 250                                         if (!strncmp(token, "RW_RAW", 6))
 251                                                 subChanRaw = TRUE;
 252                                 }
 253                         }
 254                         else if (!strncmp(token, "AUDIO", 5)) {
 255                                 ti[numtracks].type = CDDA;
 256                         }
 257                 }
 258                 else if (!strcmp(token, "DATAFILE")) {
 259                         if (ti[numtracks].type == CDDA) {
 260                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 261                                 ti[numtracks].start_offset = t;
 262                                 t = t / sector_size + sector_offs;
 263                                 sec2msf(t, (char *)&ti[numtracks].start);
 264                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 265                         }
 266                         else {
 267                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 268                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 269                         }
 270                 }
 271                 else if (!strcmp(token, "FILE")) {
 272                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 273                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 274                         t += msf2sec(ti[numtracks].start) * sector_size;
 275                         ti[numtracks].start_offset = t;
 276                         t = t / sector_size + sector_offs;
 277                         sec2msf(t, (char *)&ti[numtracks].start);
 278                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 279                 }
 280                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 281                         // skip unneeded optional fields
 282                         while (token != NULL) {
 283                                 token = strtok(NULL, " ");
 284                                 if (strchr(token, ':') != NULL)
 285                                         break;
 286                         }
 287                         if (token != NULL) {
 288                                 tok2msf(token, tmp);
 289                                 current_zero_gap = msf2sec(tmp);
 290                         }
 291                         if (numtracks > 1) {
 292                                 t = ti[numtracks - 1].start_offset;
 293                                 t /= sector_size;
 294                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 295                         }
 296                 }
 297                 else if (!strcmp(token, "START")) {
 298                         token = strtok(NULL, " ");
 299                         if (token != NULL && strchr(token, ':')) {
 300                                 tok2msf(token, tmp);
 301                                 t = msf2sec(tmp);
 302                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 303                                 t = msf2sec(ti[numtracks].start) + t;
 304                                 sec2msf(t, (char *)&ti[numtracks].start);
 305                         }
 306                 }
 307         }
 308
 309         fclose(fi);
 310
 311         return 0;
 312 }
 313
 314 // this function tries to get the .cue file of the given .bin
 315 // the necessary data is put into the ti (trackinformation)-array
 316 static int parsecue(const char *isofile) {
 317         char                    cuename[MAXPATHLEN];
 318         char                    filepath[MAXPATHLEN];
 319         char                    *incue_fname;
 320         FILE                    *fi;
 321         char                    *token;
 322         char                    time[20];
 323         char                    *tmp;
 324         char                    linebuf[256], tmpb[256], dummy[256];
 325         unsigned int    incue_max_len;
 326         unsigned int    t, file_len, mode, sector_offs;
 327         unsigned int    sector_size = 2352;
 328
 329         numtracks = 0;
 330
 331         // copy name of the iso and change extension from .bin to .cue
 332         strncpy(cuename, isofile, sizeof(cuename));
 333         cuename[MAXPATHLEN - 1] = '\0';
 334         if (strlen(cuename) >= 4) {
 335                 strcpy(cuename + strlen(cuename) - 4, ".cue");
 336         }
 337         else {
 338                 return -1;
 339         }
 340
 341         if ((fi = fopen(cuename, "r")) == NULL) {
 342                 return -1;
 343         }
 344
 345         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 346         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 347         // that...
 348         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 349                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 350                         // Don't proceed further, as this is actually a .toc file rather
 351                         // than a .cue file.
 352                         fclose(fi);
 353                         return parsetoc(isofile);
 354                 }
 355                 fseek(fi, 0, SEEK_SET);
 356         }
 357
 358         // build a path for files referenced in .cue
 359         strncpy(filepath, cuename, sizeof(filepath));
 360         tmp = strrchr(filepath, '/');
 361         if (tmp == NULL)
 362                 tmp = strrchr(filepath, '\\');
 363         if (tmp != NULL)
 364                 tmp++;
 365         else
 366                 tmp = filepath;
 367         *tmp = 0;
 368         filepath[sizeof(filepath) - 1] = 0;
 369         incue_fname = tmp;
 370         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 371
 372         memset(&ti, 0, sizeof(ti));
 373
 374         file_len = 0;
 375         sector_offs = 2 * 75;
 376
 377         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 378                 strncpy(dummy, linebuf, sizeof(linebuf));
 379                 token = strtok(dummy, " ");
 380
 381                 if (token == NULL) {
 382                         continue;
 383                 }
 384
 385                 if (!strcmp(token, "TRACK")) {
 386                         numtracks++;
 387
 388                         sector_size = 0;
 389                         if (strstr(linebuf, "AUDIO") != NULL) {
 390                                 ti[numtracks].type = CDDA;
 391                                 sector_size = 2352;
 392                         }
 393                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 394                                 ti[numtracks].type = DATA;
 395                         else {
 396                                 SysPrintf(".cue: failed to parse TRACK\n");
 397                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 398                         }
 399                         if (sector_size == 0)
 400                                 sector_size = 2352;
 401                 }
 402                 else if (!strcmp(token, "INDEX")) {
 403                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 404                                 SysPrintf(".cue: failed to parse INDEX\n");
 405                         tok2msf(time, (char *)&ti[numtracks].start);
 406
 407                         t = msf2sec(ti[numtracks].start);
 408                         ti[numtracks].start_offset = t * sector_size;
 409                         t += sector_offs;
 410                         sec2msf(t, ti[numtracks].start);
 411
 412                         // default track length to file length
 413                         t = file_len - ti[numtracks].start_offset / sector_size;
 414                         sec2msf(t, ti[numtracks].length);
 415
 416                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 417                                 // this track uses the same file as the last,
 418                                 // start of this track is last track's end
 419                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 420                                 sec2msf(t, ti[numtracks - 1].length);
 421                         }
 422                         if (numtracks > 1 && pregapOffset == -1)
 423                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 424                 }
 425                 else if (!strcmp(token, "PREGAP")) {
 426                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 427                                 tok2msf(time, dummy);
 428                                 sector_offs += msf2sec(dummy);
 429                         }
 430                         pregapOffset = -1; // mark to fill track start_offset
 431                 }
 432                 else if (!strcmp(token, "FILE")) {
 433                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 434                         if (t != 1)
 435                                 sscanf(linebuf, " FILE %255s", tmpb);
 436
 437                         // absolute path?
 438                         ti[numtracks + 1].handle = fopen(tmpb, "rb");
 439                         if (ti[numtracks + 1].handle == NULL) {
 440                                 // relative to .cue?
 441                                 tmp = strrchr(tmpb, '\\');
 442                                 if (tmp == NULL)
 443                                         tmp = strrchr(tmpb, '/');
 444                                 if (tmp != NULL)
 445                                         tmp++;
 446                                 else
 447                                         tmp = tmpb;
 448                                 strncpy(incue_fname, tmp, incue_max_len);
 449                                 ti[numtracks + 1].handle = fopen(filepath, "rb");
 450                         }
 451
 452                         // update global offset if this is not first file in this .cue
 453                         if (numtracks + 1 > 1) {
 454                                 multifile = 1;
 455                                 sector_offs += file_len;
 456                         }
 457
 458                         file_len = 0;
 459                         if (ti[numtracks + 1].handle == NULL) {
 460                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 461                                 continue;
 462                         }
 463                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 464                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 465
 466                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 467                                 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
 468                         {
 469                                 // user selected .cue as image file, use it's data track instead
 470                                 fclose(cdHandle);
 471                                 cdHandle = fopen(filepath, "rb");
 472                         }
 473                 }
 474         }
 475
 476         fclose(fi);
 477
 478         return 0;
 479 }
 480
 481 // this function tries to get the .ccd file of the given .img
 482 // the necessary data is put into the ti (trackinformation)-array
 483 static int parseccd(const char *isofile) {
 484         char                    ccdname[MAXPATHLEN];
 485         FILE                    *fi;
 486         char                    linebuf[256];
 487         unsigned int    t;
 488
 489         numtracks = 0;
 490
 491         // copy name of the iso and change extension from .img to .ccd
 492         strncpy(ccdname, isofile, sizeof(ccdname));
 493         ccdname[MAXPATHLEN - 1] = '\0';
 494         if (strlen(ccdname) >= 4) {
 495                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 496         }
 497         else {
 498                 return -1;
 499         }
 500
 501         if ((fi = fopen(ccdname, "r")) == NULL) {
 502                 return -1;
 503         }
 504
 505         memset(&ti, 0, sizeof(ti));
 506
 507         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 508                 if (!strncmp(linebuf, "[TRACK", 6)){
 509                         numtracks++;
 510                 }
 511                 else if (!strncmp(linebuf, "MODE=", 5)) {
 512                         sscanf(linebuf, "MODE=%d", &t);
 513                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 514                 }
 515                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 516                         sscanf(linebuf, "INDEX 1=%d", &t);
 517                         sec2msf(t + 2 * 75, ti[numtracks].start);
 518                         ti[numtracks].start_offset = t * 2352;
 519
 520                         // If we've already seen another track, this is its end
 521                         if (numtracks > 1) {
 522                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 523                                 sec2msf(t, ti[numtracks - 1].length);
 524                         }
 525                 }
 526         }
 527
 528         fclose(fi);
 529
 530         // Fill out the last track's end based on size
 531         if (numtracks >= 1) {
 532                 fseek(cdHandle, 0, SEEK_END);
 533                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 534                 sec2msf(t, ti[numtracks].length);
 535         }
 536
 537         return 0;
 538 }
 539
 540 // this function tries to get the .mds file of the given .mdf
 541 // the necessary data is put into the ti (trackinformation)-array
 542 static int parsemds(const char *isofile) {
 543         char                    mdsname[MAXPATHLEN];
 544         FILE                    *fi;
 545         unsigned int    offset, extra_offset, l, i;
 546         unsigned short  s;
 547
 548         numtracks = 0;
 549
 550         // copy name of the iso and change extension from .mdf to .mds
 551         strncpy(mdsname, isofile, sizeof(mdsname));
 552         mdsname[MAXPATHLEN - 1] = '\0';
 553         if (strlen(mdsname) >= 4) {
 554                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 555         }
 556         else {
 557                 return -1;
 558         }
 559
 560         if ((fi = fopen(mdsname, "rb")) == NULL) {
 561                 return -1;
 562         }
 563
 564         memset(&ti, 0, sizeof(ti));
 565
 566         // check if it's a valid mds file
 567         fread(&i, 1, sizeof(unsigned int), fi);
 568         i = SWAP32(i);
 569         if (i != 0x4944454D) {
 570                 // not an valid mds file
 571                 fclose(fi);
 572                 return -1;
 573         }
 574
 575         // get offset to session block
 576         fseek(fi, 0x50, SEEK_SET);
 577         fread(&offset, 1, sizeof(unsigned int), fi);
 578         offset = SWAP32(offset);
 579
 580         // get total number of tracks
 581         offset += 14;
 582         fseek(fi, offset, SEEK_SET);
 583         fread(&s, 1, sizeof(unsigned short), fi);
 584         s = SWAP16(s);
 585         numtracks = s;
 586
 587         // get offset to track blocks
 588         fseek(fi, 4, SEEK_CUR);
 589         fread(&offset, 1, sizeof(unsigned int), fi);
 590         offset = SWAP32(offset);
 591
 592         // skip lead-in data
 593         while (1) {
 594                 fseek(fi, offset + 4, SEEK_SET);
 595                 if (fgetc(fi) < 0xA0) {
 596                         break;
 597                 }
 598                 offset += 0x50;
 599         }
 600
 601         // check if the image contains mixed subchannel data
 602         fseek(fi, offset + 1, SEEK_SET);
 603         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 604
 605         // read track data
 606         for (i = 1; i <= numtracks; i++) {
 607                 fseek(fi, offset, SEEK_SET);
 608
 609                 // get the track type
 610                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 611                 fseek(fi, 8, SEEK_CUR);
 612
 613                 // get the track starting point
 614                 ti[i].start[0] = fgetc(fi);
 615                 ti[i].start[1] = fgetc(fi);
 616                 ti[i].start[2] = fgetc(fi);
 617
 618                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 619                 extra_offset = SWAP32(extra_offset);
 620
 621                 // get track start offset (in .mdf)
 622                 fseek(fi, offset + 0x28, SEEK_SET);
 623                 fread(&l, 1, sizeof(unsigned int), fi);
 624                 l = SWAP32(l);
 625                 ti[i].start_offset = l;
 626
 627                 // get pregap
 628                 fseek(fi, extra_offset, SEEK_SET);
 629                 fread(&l, 1, sizeof(unsigned int), fi);
 630                 l = SWAP32(l);
 631                 if (l != 0 && i > 1)
 632                         pregapOffset = msf2sec(ti[i].start);
 633
 634                 // get the track length
 635                 fread(&l, 1, sizeof(unsigned int), fi);
 636                 l = SWAP32(l);
 637                 sec2msf(l, ti[i].length);
 638
 639                 offset += 0x50;
 640         }
 641
 642         fclose(fi);
 643         return 0;
 644 }
 645
 646 static int handlepbp(const char *isofile) {
 647         struct {
 648                 unsigned int sig;
 649                 unsigned int dontcare[8];
 650                 unsigned int psar_offs;
 651         } pbp_hdr;
 652         struct {
 653                 unsigned char type;
 654                 unsigned char pad0;
 655                 unsigned char track;
 656                 char index0[3];
 657                 char pad1;
 658                 char index1[3];
 659         } toc_entry;
 660         struct {
 661                 unsigned int offset;
 662                 unsigned int size;
 663                 unsigned int dontcare[6];
 664         } index_entry;
 665         char psar_sig[11];
 666         off_t psisoimg_offs, cdimg_base;
 667         unsigned int t, cd_length;
 668         unsigned int offsettab[8];
 669         const char *ext = NULL;
 670         int i, ret;
 671
 672         if (strlen(isofile) >= 4)
 673                 ext = isofile + strlen(isofile) - 4;
 674         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 675                 return -1;
 676
 677         fseeko(cdHandle, 0, SEEK_SET);
 678
 679         numtracks = 0;
 680
 681         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 682         if (ret != sizeof(pbp_hdr)) {
 683                 SysPrintf("failed to read pbp\n");
 684                 goto fail_io;
 685         }
 686
 687         ret = fseeko(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 688         if (ret != 0) {
 689                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 690                 goto fail_io;
 691         }
 692
 693         psisoimg_offs = pbp_hdr.psar_offs;
 694         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 695         psar_sig[10] = 0;
 696         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 697                 // multidisk image?
 698                 ret = fseeko(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 699                 if (ret != 0) {
 700                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 701                         goto fail_io;
 702                 }
 703
 704                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 705                         SysPrintf("failed to read offsettab\n");
 706                         goto fail_io;
 707                 }
 708
 709                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 710                         if (offsettab[i] == 0)
 711                                 break;
 712                 }
 713                 cdrIsoMultidiskCount = i;
 714                 if (cdrIsoMultidiskCount == 0) {
 715                         SysPrintf("multidisk eboot has 0 images?\n");
 716                         goto fail_io;
 717                 }
 718
 719                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 720                         cdrIsoMultidiskSelect = 0;
 721
 722                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 723
 724                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 725                 if (ret != 0) {
 726                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 727                         goto fail_io;
 728                 }
 729
 730                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 731                 psar_sig[10] = 0;
 732         }
 733
 734         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 735                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 736                 goto fail_io;
 737         }
 738
 739         // seek to TOC
 740         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 741         if (ret != 0) {
 742                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 743                 goto fail_io;
 744         }
 745
 746         // first 3 entries are special
 747         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 748         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 749         numtracks = btoi(toc_entry.index1[0]);
 750
 751         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 752         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 753                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 754
 755         for (i = 1; i <= numtracks; i++) {
 756                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 757
 758                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 759
 760                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 761                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 762                 ti[i].start_offset *= 2352;
 763                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 764                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 765                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 766
 767                 if (i > 1) {
 768                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 769                         sec2msf(t, ti[i - 1].length);
 770                 }
 771         }
 772         t = cd_length - ti[numtracks].start_offset / 2352;
 773         sec2msf(t, ti[numtracks].length);
 774
 775         // seek to ISO index
 776         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 777         if (ret != 0) {
 778                 SysPrintf("failed to seek to ISO index\n");
 779                 goto fail_io;
 780         }
 781
 782         compr_img = calloc(1, sizeof(*compr_img));
 783         if (compr_img == NULL)
 784                 goto fail_io;
 785
 786         compr_img->block_shift = 4;
 787         compr_img->current_block = (unsigned int)-1;
 788
 789         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 790         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 791         if (compr_img->index_table == NULL)
 792                 goto fail_io;
 793
 794         cdimg_base = psisoimg_offs + 0x100000;
 795         for (i = 0; i < compr_img->index_len; i++) {
 796                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 797                 if (ret != sizeof(index_entry)) {
 798                         SysPrintf("failed to read index_entry #%d\n", i);
 799                         goto fail_index;
 800                 }
 801
 802                 if (index_entry.size == 0)
 803                         break;
 804
 805                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 806         }
 807         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 808
 809         return 0;
 810
 811 fail_index:
 812         free(compr_img->index_table);
 813         compr_img->index_table = NULL;
 814 fail_io:
 815         if (compr_img != NULL) {
 816                 free(compr_img);
 817                 compr_img = NULL;
 818         }
 819         return -1;
 820 }
 821
 822 static int handlecbin(const char *isofile) {
 823         struct
 824         {
 825                 char magic[4];
 826                 unsigned int header_size;
 827                 unsigned long long total_bytes;
 828                 unsigned int block_size;
 829                 unsigned char ver;              // 1
 830                 unsigned char align;
 831                 unsigned char rsv_06[2];
 832         } ciso_hdr;
 833         const char *ext = NULL;
 834         unsigned int *index_table = NULL;
 835         unsigned int index = 0, plain;
 836         int i, ret;
 837
 838         if (strlen(isofile) >= 5)
 839                 ext = isofile + strlen(isofile) - 5;
 840         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 841                 return -1;
 842
 843         fseek(cdHandle, 0, SEEK_SET);
 844
 845         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 846         if (ret != sizeof(ciso_hdr)) {
 847                 SysPrintf("failed to read ciso header\n");
 848                 return -1;
 849         }
 850
 851         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 852                 SysPrintf("bad ciso header\n");
 853                 return -1;
 854         }
 855         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 856                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
 857                 if (ret != 0) {
 858                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 859                         return -1;
 860                 }
 861         }
 862
 863         compr_img = calloc(1, sizeof(*compr_img));
 864         if (compr_img == NULL)
 865                 goto fail_io;
 866
 867         compr_img->block_shift = 0;
 868         compr_img->current_block = (unsigned int)-1;
 869
 870         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
 871         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
 872         if (index_table == NULL)
 873                 goto fail_io;
 874
 875         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
 876         if (ret != compr_img->index_len) {
 877                 SysPrintf("failed to read index table\n");
 878                 goto fail_index;
 879         }
 880
 881         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 882         if (compr_img->index_table == NULL)
 883                 goto fail_index;
 884
 885         for (i = 0; i < compr_img->index_len + 1; i++) {
 886                 index = index_table[i];
 887                 plain = index & 0x80000000;
 888                 index &= 0x7fffffff;
 889                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
 890                 if (plain)
 891                         compr_img->index_table[i] |= OFF_T_MSB;
 892         }
 893
 894         return 0;
 895
 896 fail_index:
 897         free(index_table);
 898 fail_io:
 899         if (compr_img != NULL) {
 900                 free(compr_img);
 901                 compr_img = NULL;
 902         }
 903         return -1;
 904 }
 905
 906 #ifdef HAVE_CHD
 907 static int handlechd(const char *isofile) {
 908         int frame_offset = 0;
 909         int file_offset = 0;
 910
 911         chd_img = (CHD_IMG *)calloc(1, sizeof(*chd_img));
 912         if (chd_img == NULL)
 913                 goto fail_io;
 914
 915         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
 916                 goto fail_io;
 917
 918         chd_img->header = chd_get_header(chd_img->chd);
 919
 920         chd_img->buffer = (unsigned char (*)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE])malloc(chd_img->header->hunkbytes);
 921         if (chd_img->buffer == NULL)
 922                 goto fail_io;
 923
 924         chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
 925         chd_img->current_hunk = (unsigned int)-1;
 926
 927         cddaBigEndian = TRUE;
 928
 929         numtracks = 0;
 930         memset(ti, 0, sizeof(ti));
 931
 932         while (1)
 933         {
 934                 struct {
 935                         char type[64];
 936                         char subtype[32];
 937                         char pgtype[32];
 938                         char pgsub[32];
 939                         uint32_t track;
 940                         uint32_t frames;
 941                         uint32_t pregap;
 942                         uint32_t postgap;
 943                 } md = {};
 944                 char meta[256];
 945                 uint32_t meta_size = 0;
 946
 947                 if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
 948                         sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
 949                 else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
 950                         sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
 951                 else
 952                         break;
 953
 954                 if(md.track == 1)
 955                         md.pregap = 150;
 956                 else
 957                         sec2msf(msf2sec(ti[md.track-1].length) + md.pregap, ti[md.track-1].length);
 958
 959                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
 960
 961                 sec2msf(frame_offset + md.pregap, ti[md.track].start);
 962                 sec2msf(md.frames, ti[md.track].length);
 963
 964                 ti[md.track].start_offset = file_offset;
 965
 966                 frame_offset += md.pregap + md.frames + md.postgap;
 967                 file_offset += md.frames + md.postgap;
 968                 numtracks++;
 969         }
 970
 971         if (numtracks)
 972                 return 0;
 973
 974 fail_io:
 975         if (chd_img != NULL) {
 976                 free(chd_img->buffer);
 977                 free(chd_img);
 978                 chd_img = NULL;
 979         }
 980         return -1;
 981 }
 982 #endif
 983
 984 // this function tries to get the .sub file of the given .img
 985 static int opensubfile(const char *isoname) {
 986         char            subname[MAXPATHLEN];
 987
 988         // copy name of the iso and change extension from .img to .sub
 989         strncpy(subname, isoname, sizeof(subname));
 990         subname[MAXPATHLEN - 1] = '\0';
 991         if (strlen(subname) >= 4) {
 992                 strcpy(subname + strlen(subname) - 4, ".sub");
 993         }
 994         else {
 995                 return -1;
 996         }
 997
 998         subHandle = fopen(subname, "rb");
 999         if (subHandle == NULL) {
1000                 return -1;
1001         }
1002
1003         return 0;
1004 }
1005
1006 static int opensbifile(const char *isoname) {
1007         char            sbiname[MAXPATHLEN];
1008         int             s;
1009
1010         strncpy(sbiname, isoname, sizeof(sbiname));
1011         sbiname[MAXPATHLEN - 1] = '\0';
1012         if (strlen(sbiname) >= 4) {
1013                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1014         }
1015         else {
1016                 return -1;
1017         }
1018
1019         fseek(cdHandle, 0, SEEK_END);
1020         s = ftell(cdHandle) / 2352;
1021
1022         return LoadSBI(sbiname, s);
1023 }
1024
1025 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1026 {
1027         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1028         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1029 }
1030
1031 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1032 {
1033         int ret;
1034
1035         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1036         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1037         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1038
1039         if (subChanRaw) DecodeRawSubData();
1040
1041         return ret;
1042 }
1043
1044 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1045 {
1046         static z_stream z;
1047         int ret = 0;
1048
1049         if (z.zalloc == NULL) {
1050                 // XXX: one-time leak here..
1051                 z.next_in = Z_NULL;
1052                 z.avail_in = 0;
1053                 z.zalloc = Z_NULL;
1054                 z.zfree = Z_NULL;
1055                 z.opaque = Z_NULL;
1056                 ret = inflateInit2(&z, -15);
1057         }
1058         else
1059                 ret = inflateReset(&z);
1060         if (ret != Z_OK)
1061                 return ret;
1062
1063         z.next_in = in;
1064         z.avail_in = in_size;
1065         z.next_out = out;
1066         z.avail_out = *out_size;
1067
1068         ret = inflate(&z, Z_NO_FLUSH);
1069         //inflateEnd(&z);
1070
1071         *out_size -= z.avail_out;
1072         return ret == 1 ? 0 : ret;
1073 }
1074
1075 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1076 {
1077         unsigned long cdbuffer_size, cdbuffer_size_expect;
1078         unsigned int size;
1079         int is_compressed;
1080         off_t start_byte;
1081         int ret, block;
1082
1083         if (base)
1084                 sector += base / 2352;
1085
1086         block = sector >> compr_img->block_shift;
1087         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1088
1089         if (block == compr_img->current_block) {
1090                 //printf("hit sect %d\n", sector);
1091                 goto finish;
1092         }
1093
1094         if (sector >= compr_img->index_len * 16) {
1095                 SysPrintf("sector %d is past img end\n", sector);
1096                 return -1;
1097         }
1098
1099         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1100         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1101                 SysPrintf("seek error for block %d at %llx: ",
1102                         block, (long long)start_byte);
1103                 perror(NULL);
1104                 return -1;
1105         }
1106
1107         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1108         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1109         if (size > sizeof(compr_img->buff_compressed)) {
1110                 SysPrintf("block %d is too large: %u\n", block, size);
1111                 return -1;
1112         }
1113
1114         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1115                                 1, size, cdHandle) != size) {
1116                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1117                 perror(NULL);
1118                 return -1;
1119         }
1120
1121         if (is_compressed) {
1122                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1123                 cdbuffer_size = cdbuffer_size_expect;
1124                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1125                 if (ret != 0) {
1126                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1127                                         ret, block, sector);
1128                         return -1;
1129                 }
1130                 if (cdbuffer_size != cdbuffer_size_expect)
1131                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1132                                         cdbuffer_size_expect, sector);
1133         }
1134
1135         // done at last!
1136         compr_img->current_block = block;
1137
1138 finish:
1139         if (dest != cdbuffer) // copy avoid HACK
1140                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1141                         CD_FRAMESIZE_RAW);
1142         return CD_FRAMESIZE_RAW;
1143 }
1144
1145 #ifdef HAVE_CHD
1146 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1147 {
1148         int hunk;
1149
1150         if (base)
1151                 sector += base;
1152
1153         hunk = sector / chd_img->sectors_per_hunk;
1154         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1155
1156         if (hunk != chd_img->current_hunk)
1157         {
1158                 chd_read(chd_img->chd, hunk, chd_img->buffer);
1159                 chd_img->current_hunk = hunk;
1160         }
1161
1162         if (dest != cdbuffer) // copy avoid HACK
1163                 memcpy(dest, chd_img->buffer[chd_img->sector_in_hunk],
1164                         CD_FRAMESIZE_RAW);
1165         return CD_FRAMESIZE_RAW;
1166 }
1167 #endif
1168
1169 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1170 {
1171         int ret;
1172
1173         fseek(f, base + sector * 2048, SEEK_SET);
1174         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1175
1176         // not really necessary, fake mode 2 header
1177         memset(cdbuffer, 0, 12 * 2);
1178         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1179         cdbuffer[12 + 3] = 1;
1180
1181         return ret;
1182 }
1183
1184 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1185         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1186 }
1187
1188 #ifdef HAVE_CHD
1189 static unsigned char *ISOgetBuffer_chd(void) {
1190         return chd_img->buffer[chd_img->sector_in_hunk] + 12;
1191 }
1192 #endif
1193
1194 static unsigned char * CALLBACK ISOgetBuffer(void) {
1195         return cdbuffer + 12;
1196 }
1197
1198 static void PrintTracks(void) {
1199         int i;
1200
1201         for (i = 1; i <= numtracks; i++) {
1202                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1203                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1204                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1205                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1206         }
1207 }
1208
1209 // This function is invoked by the front-end when opening an ISO
1210 // file for playback
1211 static long CALLBACK ISOopen(void) {
1212         boolean isMode1ISO = FALSE;
1213         char alt_bin_filename[MAXPATHLEN];
1214         const char *bin_filename;
1215
1216         if (cdHandle != NULL) {
1217                 return 0; // it's already open
1218         }
1219
1220         cdHandle = fopen(GetIsoFile(), "rb");
1221         if (cdHandle == NULL) {
1222                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1223                         GetIsoFile(), strerror(errno));
1224                 return -1;
1225         }
1226
1227         SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1228
1229         cddaBigEndian = FALSE;
1230         subChanMixed = FALSE;
1231         subChanRaw = FALSE;
1232         pregapOffset = 0;
1233         cdrIsoMultidiskCount = 1;
1234         multifile = 0;
1235
1236         CDR_getBuffer = ISOgetBuffer;
1237         cdimg_read_func = cdread_normal;
1238
1239         if (parsetoc(GetIsoFile()) == 0) {
1240                 SysPrintf("[+toc]");
1241         }
1242         else if (parseccd(GetIsoFile()) == 0) {
1243                 SysPrintf("[+ccd]");
1244         }
1245         else if (parsemds(GetIsoFile()) == 0) {
1246                 SysPrintf("[+mds]");
1247         }
1248         else if (parsecue(GetIsoFile()) == 0) {
1249                 SysPrintf("[+cue]");
1250         }
1251         if (handlepbp(GetIsoFile()) == 0) {
1252                 SysPrintf("[pbp]");
1253                 CDR_getBuffer = ISOgetBuffer_compr;
1254                 cdimg_read_func = cdread_compressed;
1255         }
1256         else if (handlecbin(GetIsoFile()) == 0) {
1257                 SysPrintf("[cbin]");
1258                 CDR_getBuffer = ISOgetBuffer_compr;
1259                 cdimg_read_func = cdread_compressed;
1260         }
1261
1262 #ifdef HAVE_CHD
1263         else if (handlechd(GetIsoFile()) == 0) {
1264                 printf("[chd]");
1265                 CDR_getBuffer = ISOgetBuffer_chd;
1266                 cdimg_read_func = cdread_chd;
1267         }
1268 #endif
1269
1270         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1271                 SysPrintf("[+sub]");
1272         }
1273         if (opensbifile(GetIsoFile()) == 0) {
1274                 SysPrintf("[+sbi]");
1275         }
1276
1277         fseeko(cdHandle, 0, SEEK_END);
1278
1279         // maybe user selected metadata file instead of main .bin ..
1280         bin_filename = GetIsoFile();
1281         if (ftello(cdHandle) < 2352 * 0x10) {
1282                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1283                 FILE *tmpf = NULL;
1284                 size_t i;
1285                 char *p;
1286
1287                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1288                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1289                 if (strlen(alt_bin_filename) >= 4) {
1290                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1291                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1292                                 strcpy(p, exts[i]);
1293                                 tmpf = fopen(alt_bin_filename, "rb");
1294                                 if (tmpf != NULL)
1295                                         break;
1296                         }
1297                 }
1298                 if (tmpf != NULL) {
1299                         bin_filename = alt_bin_filename;
1300                         fclose(cdHandle);
1301                         cdHandle = tmpf;
1302                         fseeko(cdHandle, 0, SEEK_END);
1303                 }
1304         }
1305
1306         // guess whether it is mode1/2048
1307         if (ftello(cdHandle) % 2048 == 0) {
1308                 unsigned int modeTest = 0;
1309                 fseek(cdHandle, 0, SEEK_SET);
1310                 fread(&modeTest, 4, 1, cdHandle);
1311                 if (SWAP32(modeTest) != 0xffffff00) {
1312                         SysPrintf("[2048]");
1313                         isMode1ISO = TRUE;
1314                 }
1315         }
1316         fseek(cdHandle, 0, SEEK_SET);
1317
1318         SysPrintf(".\n");
1319
1320         PrintTracks();
1321
1322         if (subChanMixed)
1323                 cdimg_read_func = cdread_sub_mixed;
1324         else if (isMode1ISO)
1325                 cdimg_read_func = cdread_2048;
1326
1327         // make sure we have another handle open for cdda
1328         if (numtracks > 1 && ti[1].handle == NULL) {
1329                 ti[1].handle = fopen(bin_filename, "rb");
1330         }
1331
1332         return 0;
1333 }
1334
1335 static long CALLBACK ISOclose(void) {
1336         int i;
1337
1338         if (cdHandle != NULL) {
1339                 fclose(cdHandle);
1340                 cdHandle = NULL;
1341         }
1342         if (subHandle != NULL) {
1343                 fclose(subHandle);
1344                 subHandle = NULL;
1345         }
1346         stopCDDA();
1347         cddaHandle = NULL;
1348
1349         if (compr_img != NULL) {
1350                 free(compr_img->index_table);
1351                 free(compr_img);
1352                 compr_img = NULL;
1353         }
1354
1355 #ifdef HAVE_CHD
1356         if (chd_img != NULL) {
1357                 chd_close(chd_img->chd);
1358                 free(chd_img->buffer);
1359                 free(chd_img);
1360                 chd_img = NULL;
1361         }
1362 #endif
1363
1364         for (i = 1; i <= numtracks; i++) {
1365                 if (ti[i].handle != NULL) {
1366                         fclose(ti[i].handle);
1367                         ti[i].handle = NULL;
1368                 }
1369         }
1370         numtracks = 0;
1371         ti[1].type = 0;
1372         UnloadSBI();
1373
1374         memset(cdbuffer, 0, sizeof(cdbuffer));
1375         CDR_getBuffer = ISOgetBuffer;
1376
1377         return 0;
1378 }
1379
1380 static long CALLBACK ISOinit(void) {
1381         assert(cdHandle == NULL);
1382         assert(subHandle == NULL);
1383
1384         return 0; // do nothing
1385 }
1386
1387 static long CALLBACK ISOshutdown(void) {
1388         ISOclose();
1389         return 0;
1390 }
1391
1392 // return Starting and Ending Track
1393 // buffer:
1394 //  byte 0 - start track
1395 //  byte 1 - end track
1396 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1397         buffer[0] = 1;
1398
1399         if (numtracks > 0) {
1400                 buffer[1] = numtracks;
1401         }
1402         else {
1403                 buffer[1] = 1;
1404         }
1405
1406         return 0;
1407 }
1408
1409 // return Track Time
1410 // buffer:
1411 //  byte 0 - frame
1412 //  byte 1 - second
1413 //  byte 2 - minute
1414 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1415         if (track == 0) {
1416                 unsigned int sect;
1417                 unsigned char time[3];
1418                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1419                 sec2msf(sect, (char *)time);
1420                 buffer[2] = time[0];
1421                 buffer[1] = time[1];
1422                 buffer[0] = time[2];
1423         }
1424         else if (numtracks > 0 && track <= numtracks) {
1425                 buffer[2] = ti[track].start[0];
1426                 buffer[1] = ti[track].start[1];
1427                 buffer[0] = ti[track].start[2];
1428         }
1429         else {
1430                 buffer[2] = 0;
1431                 buffer[1] = 2;
1432                 buffer[0] = 0;
1433         }
1434
1435         return 0;
1436 }
1437
1438 // decode 'raw' subchannel data ripped by cdrdao
1439 static void DecodeRawSubData(void) {
1440         unsigned char subQData[12];
1441         int i;
1442
1443         memset(subQData, 0, sizeof(subQData));
1444
1445         for (i = 0; i < 8 * 12; i++) {
1446                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1447                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1448                 }
1449         }
1450
1451         memcpy(&subbuffer[12], subQData, 12);
1452 }
1453
1454 // read track
1455 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1456 // uses bcd format
1457 static boolean CALLBACK ISOreadTrack(unsigned char *time) {
1458         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1459         long ret;
1460
1461         if (cdHandle == NULL) {
1462                 return 0;
1463         }
1464
1465         if (pregapOffset) {
1466                 subChanMissing = FALSE;
1467                 if (sector >= pregapOffset) {
1468                         sector -= 2 * 75;
1469                         if (sector < pregapOffset)
1470                                 subChanMissing = TRUE;
1471                 }
1472         }
1473
1474         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1475         if (ret < 0)
1476                 return 0;
1477
1478         if (subHandle != NULL) {
1479                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1480                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1481
1482                 if (subChanRaw) DecodeRawSubData();
1483         }
1484
1485         return 1;
1486 }
1487
1488 // plays cdda audio
1489 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1490 // does NOT uses bcd format
1491 static long CALLBACK ISOplay(unsigned char *time) {
1492         playing = TRUE;
1493         return 0;
1494 }
1495
1496 // stops cdda audio
1497 static long CALLBACK ISOstop(void) {
1498         stopCDDA();
1499         return 0;
1500 }
1501
1502 // gets subchannel data
1503 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1504         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1505                 return subbuffer;
1506         }
1507
1508         return NULL;
1509 }
1510
1511 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1512         u32 sect;
1513
1514         CDR__getStatus(stat);
1515
1516         if (playing) {
1517                 stat->Type = 0x02;
1518                 stat->Status |= 0x80;
1519         }
1520         else {
1521                 // BIOS - boot ID (CD type)
1522                 stat->Type = ti[1].type;
1523         }
1524
1525         // relative -> absolute time
1526         sect = cddaCurPos;
1527         sec2msf(sect, (char *)stat->Time);
1528
1529         return 0;
1530 }
1531
1532 // read CDDA sector into buffer
1533 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1534         unsigned char msf[3] = {m, s, f};
1535         unsigned int file, track, track_start = 0;
1536         int ret;
1537
1538         cddaCurPos = msf2sec((char *)msf);
1539
1540         // find current track index
1541         for (track = numtracks; ; track--) {
1542                 track_start = msf2sec(ti[track].start);
1543                 if (track_start <= cddaCurPos)
1544                         break;
1545                 if (track == 1)
1546                         break;
1547         }
1548
1549         // data tracks play silent
1550         if (ti[track].type != CDDA) {
1551                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1552                 return 0;
1553         }
1554
1555         file = 1;
1556         if (multifile) {
1557                 // find the file that contains this track
1558                 for (file = track; file > 1; file--)
1559                         if (ti[file].handle != NULL)
1560                                 break;
1561         }
1562
1563         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1564                 buffer, cddaCurPos - track_start);
1565         if (ret != CD_FRAMESIZE_RAW) {
1566                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1567                 return -1;
1568         }
1569
1570         if (cddaBigEndian) {
1571                 int i;
1572                 unsigned char tmp;
1573
1574                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1575                         tmp = buffer[i * 2];
1576                         buffer[i * 2] = buffer[i * 2 + 1];
1577                         buffer[i * 2 + 1] = tmp;
1578                 }
1579         }
1580
1581         return 0;
1582 }
1583
1584 void cdrIsoInit(void) {
1585         CDR_init = ISOinit;
1586         CDR_shutdown = ISOshutdown;
1587         CDR_open = ISOopen;
1588         CDR_close = ISOclose;
1589         CDR_getTN = ISOgetTN;
1590         CDR_getTD = ISOgetTD;
1591         CDR_readTrack = ISOreadTrack;
1592         CDR_getBuffer = ISOgetBuffer;
1593         CDR_play = ISOplay;
1594         CDR_stop = ISOstop;
1595         CDR_getBufferSub = ISOgetBufferSub;
1596         CDR_getStatus = ISOgetStatus;
1597         CDR_readCDDA = ISOreadCDDA;
1598
1599         CDR_getDriveLetter = CDR__getDriveLetter;
1600         CDR_configure = CDR__configure;
1601         CDR_test = CDR__test;
1602         CDR_about = CDR__about;
1603         CDR_setfilename = CDR__setfilename;
1604
1605         numtracks = 0;
1606 }
1607
1608 int cdrIsoActive(void) {
1609         return (cdHandle != NULL);
1610 }