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 unsigned char sndbuffer[CD_FRAMESIZE_RAW * 10];
  65
  66 #define CDDA_FRAMETIME                  (1000 * (sizeof(sndbuffer) / CD_FRAMESIZE_RAW) / 75)
  67
  68 static unsigned int initial_offset = 0;
  69 static boolean playing = FALSE;
  70 static boolean cddaBigEndian = FALSE;
  71 // cdda sectors in toc, byte offset in file
  72 static unsigned int cdda_cur_sector;
  73 static unsigned int cdda_first_sector;
  74 static unsigned int cdda_file_offset;
  75 /* Frame offset into CD image where pregap data would be found if it was there.
  76  * If a game seeks there we must *not* return subchannel data since it's
  77  * not in the CD image, so that cdrom code can fake subchannel data instead.
  78  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  79 static unsigned int pregapOffset;
  80
  81 #define cddaCurPos cdda_cur_sector
  82
  83 // compressed image stuff
  84 static struct {
  85         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  86         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  87         off_t *index_table;
  88         unsigned int index_len;
  89         unsigned int block_shift;
  90         unsigned int current_block;
  91         unsigned int sector_in_blk;
  92 } *compr_img;
  93
  94 #ifdef HAVE_CHD
  95 typedef struct {
  96         unsigned char (*buffer)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE];
  97         chd_file* chd;
  98         const chd_header* header;
  99         unsigned int sectors_per_hunk;
 100         unsigned int current_hunk;
 101         unsigned int sector_in_hunk;
 102 } CHD_IMG;
 103
 104 static CHD_IMG *chd_img;
 105 #endif
 106
 107 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
 108
 109 char* CALLBACK CDR__getDriveLetter(void);
 110 long CALLBACK CDR__configure(void);
 111 long CALLBACK CDR__test(void);
 112 void CALLBACK CDR__about(void);
 113 long CALLBACK CDR__setfilename(char *filename);
 114 long CALLBACK CDR__getStatus(struct CdrStat *stat);
 115
 116 static void DecodeRawSubData(void);
 117
 118 struct trackinfo {
 119         enum {DATA=1, CDDA} type;
 120         char start[3];          // MSF-format
 121         char length[3];         // MSF-format
 122         FILE *handle;           // for multi-track images CDDA
 123         unsigned int start_offset; // byte offset from start of above file
 124 };
 125
 126 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 127
 128 static int numtracks = 0;
 129 static struct trackinfo ti[MAXTRACKS];
 130
 131 // get a sector from a msf-array
 132 static unsigned int msf2sec(char *msf) {
 133         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 134 }
 135
 136 static void sec2msf(unsigned int s, char *msf) {
 137         msf[0] = s / 75 / 60;
 138         s = s - msf[0] * 75 * 60;
 139         msf[1] = s / 75;
 140         s = s - msf[1] * 75;
 141         msf[2] = s;
 142 }
 143
 144 // divide a string of xx:yy:zz into m, s, f
 145 static void tok2msf(char *time, char *msf) {
 146         char *token;
 147
 148         token = strtok(time, ":");
 149         if (token) {
 150                 msf[0] = atoi(token);
 151         }
 152         else {
 153                 msf[0] = 0;
 154         }
 155
 156         token = strtok(NULL, ":");
 157         if (token) {
 158                 msf[1] = atoi(token);
 159         }
 160         else {
 161                 msf[1] = 0;
 162         }
 163
 164         token = strtok(NULL, ":");
 165         if (token) {
 166                 msf[2] = atoi(token);
 167         }
 168         else {
 169                 msf[2] = 0;
 170         }
 171 }
 172
 173 #ifndef _WIN32
 174 static long GetTickCount(void) {
 175         static time_t           initial_time = 0;
 176         struct timeval          now;
 177
 178         gettimeofday(&now, NULL);
 179
 180         if (initial_time == 0) {
 181                 initial_time = now.tv_sec;
 182         }
 183
 184         return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
 185 }
 186 #endif
 187
 188 // stop the CDDA playback
 189 static void stopCDDA() {
 190         playing = FALSE;
 191 }
 192
 193 // this function tries to get the .toc file of the given .bin
 194 // the necessary data is put into the ti (trackinformation)-array
 195 static int parsetoc(const char *isofile) {
 196         char                    tocname[MAXPATHLEN];
 197         FILE                    *fi;
 198         char                    linebuf[256], tmp[256], name[256];
 199         char                    *token;
 200         char                    time[20], time2[20];
 201         unsigned int    t, sector_offs, sector_size;
 202         unsigned int    current_zero_gap = 0;
 203
 204         numtracks = 0;
 205
 206         // copy name of the iso and change extension from .bin to .toc
 207         strncpy(tocname, isofile, sizeof(tocname));
 208         tocname[MAXPATHLEN - 1] = '\0';
 209         if (strlen(tocname) >= 4) {
 210                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 211         }
 212         else {
 213                 return -1;
 214         }
 215
 216         if ((fi = fopen(tocname, "r")) == NULL) {
 217                 // try changing extension to .cue (to satisfy some stupid tutorials)
 218                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 219                 if ((fi = fopen(tocname, "r")) == NULL) {
 220                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 221                         strcpy(tocname, isofile);
 222                         t = strlen(tocname);
 223                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 224                                 tocname[t - 4] = '\0';
 225                                 if ((fi = fopen(tocname, "r")) == NULL) {
 226                                         return -1;
 227                                 }
 228                         }
 229                         else {
 230                                 return -1;
 231                         }
 232                 }
 233                 // check if it's really a TOC named as a .cue
 234                 fgets(linebuf, sizeof(linebuf), fi);
 235                 token = strtok(linebuf, " ");
 236                 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 237                         fclose(fi);
 238                         return -1;
 239                 }
 240                 fseek(fi, 0, SEEK_SET);
 241         }
 242
 243         memset(&ti, 0, sizeof(ti));
 244         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 245
 246         sector_size = CD_FRAMESIZE_RAW;
 247         sector_offs = 2 * 75;
 248
 249         // parse the .toc file
 250         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 251                 // search for tracks
 252                 strncpy(tmp, linebuf, sizeof(linebuf));
 253                 token = strtok(tmp, " ");
 254
 255                 if (token == NULL) continue;
 256
 257                 if (!strcmp(token, "TRACK")) {
 258                         sector_offs += current_zero_gap;
 259                         current_zero_gap = 0;
 260
 261                         // get type of track
 262                         token = strtok(NULL, " ");
 263                         numtracks++;
 264
 265                         if (!strncmp(token, "MODE2_RAW", 9)) {
 266                                 ti[numtracks].type = DATA;
 267                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 268
 269                                 // check if this image contains mixed subchannel data
 270                                 token = strtok(NULL, " ");
 271                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 272                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 273                                         subChanMixed = TRUE;
 274                                         if (!strncmp(token, "RW_RAW", 6))
 275                                                 subChanRaw = TRUE;
 276                                 }
 277                         }
 278                         else if (!strncmp(token, "AUDIO", 5)) {
 279                                 ti[numtracks].type = CDDA;
 280                         }
 281                 }
 282                 else if (!strcmp(token, "DATAFILE")) {
 283                         if (ti[numtracks].type == CDDA) {
 284                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 285                                 ti[numtracks].start_offset = t;
 286                                 t = t / sector_size + sector_offs;
 287                                 sec2msf(t, (char *)&ti[numtracks].start);
 288                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 289                         }
 290                         else {
 291                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 292                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 293                         }
 294                 }
 295                 else if (!strcmp(token, "FILE")) {
 296                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 297                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 298                         t += msf2sec(ti[numtracks].start) * sector_size;
 299                         ti[numtracks].start_offset = t;
 300                         t = t / sector_size + sector_offs;
 301                         sec2msf(t, (char *)&ti[numtracks].start);
 302                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 303                 }
 304                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 305                         // skip unneeded optional fields
 306                         while (token != NULL) {
 307                                 token = strtok(NULL, " ");
 308                                 if (strchr(token, ':') != NULL)
 309                                         break;
 310                         }
 311                         if (token != NULL) {
 312                                 tok2msf(token, tmp);
 313                                 current_zero_gap = msf2sec(tmp);
 314                         }
 315                         if (numtracks > 1) {
 316                                 t = ti[numtracks - 1].start_offset;
 317                                 t /= sector_size;
 318                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 319                         }
 320                 }
 321                 else if (!strcmp(token, "START")) {
 322                         token = strtok(NULL, " ");
 323                         if (token != NULL && strchr(token, ':')) {
 324                                 tok2msf(token, tmp);
 325                                 t = msf2sec(tmp);
 326                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 327                                 t = msf2sec(ti[numtracks].start) + t;
 328                                 sec2msf(t, (char *)&ti[numtracks].start);
 329                         }
 330                 }
 331         }
 332
 333         fclose(fi);
 334
 335         return 0;
 336 }
 337
 338 // this function tries to get the .cue file of the given .bin
 339 // the necessary data is put into the ti (trackinformation)-array
 340 static int parsecue(const char *isofile) {
 341         char                    cuename[MAXPATHLEN];
 342         char                    filepath[MAXPATHLEN];
 343         char                    *incue_fname;
 344         FILE                    *fi;
 345         char                    *token;
 346         char                    time[20];
 347         char                    *tmp;
 348         char                    linebuf[256], tmpb[256], dummy[256];
 349         unsigned int    incue_max_len;
 350         unsigned int    t, file_len, mode, sector_offs;
 351         unsigned int    sector_size = 2352;
 352
 353         numtracks = 0;
 354
 355         // copy name of the iso and change extension from .bin to .cue
 356         strncpy(cuename, isofile, sizeof(cuename));
 357         cuename[MAXPATHLEN - 1] = '\0';
 358         if (strlen(cuename) >= 4) {
 359                 strcpy(cuename + strlen(cuename) - 4, ".cue");
 360         }
 361         else {
 362                 return -1;
 363         }
 364
 365         if ((fi = fopen(cuename, "r")) == NULL) {
 366                 return -1;
 367         }
 368
 369         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 370         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 371         // that...
 372         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 373                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 374                         // Don't proceed further, as this is actually a .toc file rather
 375                         // than a .cue file.
 376                         fclose(fi);
 377                         return parsetoc(isofile);
 378                 }
 379                 fseek(fi, 0, SEEK_SET);
 380         }
 381
 382         // build a path for files referenced in .cue
 383         strncpy(filepath, cuename, sizeof(filepath));
 384         tmp = strrchr(filepath, '/');
 385         if (tmp == NULL)
 386                 tmp = strrchr(filepath, '\\');
 387         if (tmp != NULL)
 388                 tmp++;
 389         else
 390                 tmp = filepath;
 391         *tmp = 0;
 392         filepath[sizeof(filepath) - 1] = 0;
 393         incue_fname = tmp;
 394         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 395
 396         memset(&ti, 0, sizeof(ti));
 397
 398         file_len = 0;
 399         sector_offs = 2 * 75;
 400
 401         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 402                 strncpy(dummy, linebuf, sizeof(linebuf));
 403                 token = strtok(dummy, " ");
 404
 405                 if (token == NULL) {
 406                         continue;
 407                 }
 408
 409                 if (!strcmp(token, "TRACK")) {
 410                         numtracks++;
 411
 412                         sector_size = 0;
 413                         if (strstr(linebuf, "AUDIO") != NULL) {
 414                                 ti[numtracks].type = CDDA;
 415                                 sector_size = 2352;
 416                         }
 417                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 418                                 ti[numtracks].type = DATA;
 419                         else {
 420                                 SysPrintf(".cue: failed to parse TRACK\n");
 421                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 422                         }
 423                         if (sector_size == 0)
 424                                 sector_size = 2352;
 425                 }
 426                 else if (!strcmp(token, "INDEX")) {
 427                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 428                                 SysPrintf(".cue: failed to parse INDEX\n");
 429                         tok2msf(time, (char *)&ti[numtracks].start);
 430
 431                         t = msf2sec(ti[numtracks].start);
 432                         ti[numtracks].start_offset = t * sector_size;
 433                         t += sector_offs;
 434                         sec2msf(t, ti[numtracks].start);
 435
 436                         // default track length to file length
 437                         t = file_len - ti[numtracks].start_offset / sector_size;
 438                         sec2msf(t, ti[numtracks].length);
 439
 440                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 441                                 // this track uses the same file as the last,
 442                                 // start of this track is last track's end
 443                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 444                                 sec2msf(t, ti[numtracks - 1].length);
 445                         }
 446                         if (numtracks > 1 && pregapOffset == -1)
 447                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 448                 }
 449                 else if (!strcmp(token, "PREGAP")) {
 450                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 451                                 tok2msf(time, dummy);
 452                                 sector_offs += msf2sec(dummy);
 453                         }
 454                         pregapOffset = -1; // mark to fill track start_offset
 455                 }
 456                 else if (!strcmp(token, "FILE")) {
 457                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 458                         if (t != 1)
 459                                 sscanf(linebuf, " FILE %255s", tmpb);
 460
 461                         // absolute path?
 462                         ti[numtracks + 1].handle = fopen(tmpb, "rb");
 463                         if (ti[numtracks + 1].handle == NULL) {
 464                                 // relative to .cue?
 465                                 tmp = strrchr(tmpb, '\\');
 466                                 if (tmp == NULL)
 467                                         tmp = strrchr(tmpb, '/');
 468                                 if (tmp != NULL)
 469                                         tmp++;
 470                                 else
 471                                         tmp = tmpb;
 472                                 strncpy(incue_fname, tmp, incue_max_len);
 473                                 ti[numtracks + 1].handle = fopen(filepath, "rb");
 474                         }
 475
 476                         // update global offset if this is not first file in this .cue
 477                         if (numtracks + 1 > 1) {
 478                                 multifile = 1;
 479                                 sector_offs += file_len;
 480                         }
 481
 482                         file_len = 0;
 483                         if (ti[numtracks + 1].handle == NULL) {
 484                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 485                                 continue;
 486                         }
 487                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 488                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 489
 490                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 491                                 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
 492                         {
 493                                 // user selected .cue as image file, use it's data track instead
 494                                 fclose(cdHandle);
 495                                 cdHandle = fopen(filepath, "rb");
 496                         }
 497                 }
 498         }
 499
 500         fclose(fi);
 501
 502         return 0;
 503 }
 504
 505 // this function tries to get the .ccd file of the given .img
 506 // the necessary data is put into the ti (trackinformation)-array
 507 static int parseccd(const char *isofile) {
 508         char                    ccdname[MAXPATHLEN];
 509         FILE                    *fi;
 510         char                    linebuf[256];
 511         unsigned int    t;
 512
 513         numtracks = 0;
 514
 515         // copy name of the iso and change extension from .img to .ccd
 516         strncpy(ccdname, isofile, sizeof(ccdname));
 517         ccdname[MAXPATHLEN - 1] = '\0';
 518         if (strlen(ccdname) >= 4) {
 519                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 520         }
 521         else {
 522                 return -1;
 523         }
 524
 525         if ((fi = fopen(ccdname, "r")) == NULL) {
 526                 return -1;
 527         }
 528
 529         memset(&ti, 0, sizeof(ti));
 530
 531         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 532                 if (!strncmp(linebuf, "[TRACK", 6)){
 533                         numtracks++;
 534                 }
 535                 else if (!strncmp(linebuf, "MODE=", 5)) {
 536                         sscanf(linebuf, "MODE=%d", &t);
 537                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 538                 }
 539                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 540                         sscanf(linebuf, "INDEX 1=%d", &t);
 541                         sec2msf(t + 2 * 75, ti[numtracks].start);
 542                         ti[numtracks].start_offset = t * 2352;
 543
 544                         // If we've already seen another track, this is its end
 545                         if (numtracks > 1) {
 546                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 547                                 sec2msf(t, ti[numtracks - 1].length);
 548                         }
 549                 }
 550         }
 551
 552         fclose(fi);
 553
 554         // Fill out the last track's end based on size
 555         if (numtracks >= 1) {
 556                 fseek(cdHandle, 0, SEEK_END);
 557                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 558                 sec2msf(t, ti[numtracks].length);
 559         }
 560
 561         return 0;
 562 }
 563
 564 // this function tries to get the .mds file of the given .mdf
 565 // the necessary data is put into the ti (trackinformation)-array
 566 static int parsemds(const char *isofile) {
 567         char                    mdsname[MAXPATHLEN];
 568         FILE                    *fi;
 569         unsigned int    offset, extra_offset, l, i;
 570         unsigned short  s;
 571
 572         numtracks = 0;
 573
 574         // copy name of the iso and change extension from .mdf to .mds
 575         strncpy(mdsname, isofile, sizeof(mdsname));
 576         mdsname[MAXPATHLEN - 1] = '\0';
 577         if (strlen(mdsname) >= 4) {
 578                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 579         }
 580         else {
 581                 return -1;
 582         }
 583
 584         if ((fi = fopen(mdsname, "rb")) == NULL) {
 585                 return -1;
 586         }
 587
 588         memset(&ti, 0, sizeof(ti));
 589
 590         // check if it's a valid mds file
 591         fread(&i, 1, sizeof(unsigned int), fi);
 592         i = SWAP32(i);
 593         if (i != 0x4944454D) {
 594                 // not an valid mds file
 595                 fclose(fi);
 596                 return -1;
 597         }
 598
 599         // get offset to session block
 600         fseek(fi, 0x50, SEEK_SET);
 601         fread(&offset, 1, sizeof(unsigned int), fi);
 602         offset = SWAP32(offset);
 603
 604         // get total number of tracks
 605         offset += 14;
 606         fseek(fi, offset, SEEK_SET);
 607         fread(&s, 1, sizeof(unsigned short), fi);
 608         s = SWAP16(s);
 609         numtracks = s;
 610
 611         // get offset to track blocks
 612         fseek(fi, 4, SEEK_CUR);
 613         fread(&offset, 1, sizeof(unsigned int), fi);
 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                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 643                 extra_offset = SWAP32(extra_offset);
 644
 645                 // get track start offset (in .mdf)
 646                 fseek(fi, offset + 0x28, SEEK_SET);
 647                 fread(&l, 1, sizeof(unsigned int), fi);
 648                 l = SWAP32(l);
 649                 ti[i].start_offset = l;
 650
 651                 // get pregap
 652                 fseek(fi, extra_offset, SEEK_SET);
 653                 fread(&l, 1, sizeof(unsigned int), fi);
 654                 l = SWAP32(l);
 655                 if (l != 0 && i > 1)
 656                         pregapOffset = msf2sec(ti[i].start);
 657
 658                 // get the track length
 659                 fread(&l, 1, sizeof(unsigned int), fi);
 660                 l = SWAP32(l);
 661                 sec2msf(l, ti[i].length);
 662
 663                 offset += 0x50;
 664         }
 665
 666         fclose(fi);
 667         return 0;
 668 }
 669
 670 static int handlepbp(const char *isofile) {
 671         struct {
 672                 unsigned int sig;
 673                 unsigned int dontcare[8];
 674                 unsigned int psar_offs;
 675         } pbp_hdr;
 676         struct {
 677                 unsigned char type;
 678                 unsigned char pad0;
 679                 unsigned char track;
 680                 char index0[3];
 681                 char pad1;
 682                 char index1[3];
 683         } toc_entry;
 684         struct {
 685                 unsigned int offset;
 686                 unsigned int size;
 687                 unsigned int dontcare[6];
 688         } index_entry;
 689         char psar_sig[11];
 690         off_t psisoimg_offs, cdimg_base;
 691         unsigned int t, cd_length;
 692         unsigned int offsettab[8];
 693         const char *ext = NULL;
 694         int i, ret;
 695
 696         if (strlen(isofile) >= 4)
 697                 ext = isofile + strlen(isofile) - 4;
 698         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 699                 return -1;
 700
 701         fseeko(cdHandle, 0, SEEK_SET);
 702
 703         numtracks = 0;
 704
 705         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 706         if (ret != sizeof(pbp_hdr)) {
 707                 SysPrintf("failed to read pbp\n");
 708                 goto fail_io;
 709         }
 710
 711         ret = fseeko(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 712         if (ret != 0) {
 713                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 714                 goto fail_io;
 715         }
 716
 717         psisoimg_offs = pbp_hdr.psar_offs;
 718         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 719         psar_sig[10] = 0;
 720         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 721                 // multidisk image?
 722                 ret = fseeko(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 723                 if (ret != 0) {
 724                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 725                         goto fail_io;
 726                 }
 727
 728                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 729                         SysPrintf("failed to read offsettab\n");
 730                         goto fail_io;
 731                 }
 732
 733                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 734                         if (offsettab[i] == 0)
 735                                 break;
 736                 }
 737                 cdrIsoMultidiskCount = i;
 738                 if (cdrIsoMultidiskCount == 0) {
 739                         SysPrintf("multidisk eboot has 0 images?\n");
 740                         goto fail_io;
 741                 }
 742
 743                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 744                         cdrIsoMultidiskSelect = 0;
 745
 746                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 747
 748                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 749                 if (ret != 0) {
 750                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 751                         goto fail_io;
 752                 }
 753
 754                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 755                 psar_sig[10] = 0;
 756         }
 757
 758         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 759                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 760                 goto fail_io;
 761         }
 762
 763         // seek to TOC
 764         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 765         if (ret != 0) {
 766                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 767                 goto fail_io;
 768         }
 769
 770         // first 3 entries are special
 771         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 772         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 773         numtracks = btoi(toc_entry.index1[0]);
 774
 775         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 776         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 777                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 778
 779         for (i = 1; i <= numtracks; i++) {
 780                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 781
 782                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 783
 784                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 785                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 786                 ti[i].start_offset *= 2352;
 787                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 788                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 789                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 790
 791                 if (i > 1) {
 792                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 793                         sec2msf(t, ti[i - 1].length);
 794                 }
 795         }
 796         t = cd_length - ti[numtracks].start_offset / 2352;
 797         sec2msf(t, ti[numtracks].length);
 798
 799         // seek to ISO index
 800         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 801         if (ret != 0) {
 802                 SysPrintf("failed to seek to ISO index\n");
 803                 goto fail_io;
 804         }
 805
 806         compr_img = calloc(1, sizeof(*compr_img));
 807         if (compr_img == NULL)
 808                 goto fail_io;
 809
 810         compr_img->block_shift = 4;
 811         compr_img->current_block = (unsigned int)-1;
 812
 813         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 814         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 815         if (compr_img->index_table == NULL)
 816                 goto fail_io;
 817
 818         cdimg_base = psisoimg_offs + 0x100000;
 819         for (i = 0; i < compr_img->index_len; i++) {
 820                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 821                 if (ret != sizeof(index_entry)) {
 822                         SysPrintf("failed to read index_entry #%d\n", i);
 823                         goto fail_index;
 824                 }
 825
 826                 if (index_entry.size == 0)
 827                         break;
 828
 829                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 830         }
 831         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 832
 833         return 0;
 834
 835 fail_index:
 836         free(compr_img->index_table);
 837         compr_img->index_table = NULL;
 838 fail_io:
 839         if (compr_img != NULL) {
 840                 free(compr_img);
 841                 compr_img = NULL;
 842         }
 843         return -1;
 844 }
 845
 846 static int handlecbin(const char *isofile) {
 847         struct
 848         {
 849                 char magic[4];
 850                 unsigned int header_size;
 851                 unsigned long long total_bytes;
 852                 unsigned int block_size;
 853                 unsigned char ver;              // 1
 854                 unsigned char align;
 855                 unsigned char rsv_06[2];
 856         } ciso_hdr;
 857         const char *ext = NULL;
 858         unsigned int *index_table = NULL;
 859         unsigned int index = 0, plain;
 860         int i, ret;
 861
 862         if (strlen(isofile) >= 5)
 863                 ext = isofile + strlen(isofile) - 5;
 864         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 865                 return -1;
 866
 867         fseek(cdHandle, 0, SEEK_SET);
 868
 869         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 870         if (ret != sizeof(ciso_hdr)) {
 871                 SysPrintf("failed to read ciso header\n");
 872                 return -1;
 873         }
 874
 875         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 876                 SysPrintf("bad ciso header\n");
 877                 return -1;
 878         }
 879         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 880                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
 881                 if (ret != 0) {
 882                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 883                         return -1;
 884                 }
 885         }
 886
 887         compr_img = calloc(1, sizeof(*compr_img));
 888         if (compr_img == NULL)
 889                 goto fail_io;
 890
 891         compr_img->block_shift = 0;
 892         compr_img->current_block = (unsigned int)-1;
 893
 894         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
 895         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
 896         if (index_table == NULL)
 897                 goto fail_io;
 898
 899         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
 900         if (ret != compr_img->index_len) {
 901                 SysPrintf("failed to read index table\n");
 902                 goto fail_index;
 903         }
 904
 905         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 906         if (compr_img->index_table == NULL)
 907                 goto fail_index;
 908
 909         for (i = 0; i < compr_img->index_len + 1; i++) {
 910                 index = index_table[i];
 911                 plain = index & 0x80000000;
 912                 index &= 0x7fffffff;
 913                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
 914                 if (plain)
 915                         compr_img->index_table[i] |= OFF_T_MSB;
 916         }
 917
 918         return 0;
 919
 920 fail_index:
 921         free(index_table);
 922 fail_io:
 923         if (compr_img != NULL) {
 924                 free(compr_img);
 925                 compr_img = NULL;
 926         }
 927         return -1;
 928 }
 929
 930 #ifdef HAVE_CHD
 931 static int handlechd(const char *isofile) {
 932         int frame_offset = 0;
 933         int file_offset = 0;
 934
 935         chd_img = (CHD_IMG *)calloc(1, sizeof(*chd_img));
 936         if (chd_img == NULL)
 937                 goto fail_io;
 938
 939         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
 940                 goto fail_io;
 941
 942         chd_img->header = chd_get_header(chd_img->chd);
 943
 944         chd_img->buffer = (unsigned char (*)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE])malloc(chd_img->header->hunkbytes);
 945         if (chd_img->buffer == NULL)
 946                 goto fail_io;
 947
 948         chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
 949         chd_img->current_hunk = (unsigned int)-1;
 950
 951         cddaBigEndian = TRUE;
 952
 953         numtracks = 0;
 954         memset(ti, 0, sizeof(ti));
 955
 956         while (1)
 957         {
 958                 struct {
 959                         char type[64];
 960                         char subtype[32];
 961                         char pgtype[32];
 962                         char pgsub[32];
 963                         uint32_t track;
 964                         uint32_t frames;
 965                         uint32_t pregap;
 966                         uint32_t postgap;
 967                 } md = {};
 968                 char meta[256];
 969                 uint32_t meta_size = 0;
 970
 971                 if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
 972                         sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
 973                 else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
 974                         sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
 975                 else
 976                         break;
 977
 978                 if(md.track == 1)
 979                         md.pregap = 150;
 980                 else
 981                         sec2msf(msf2sec(ti[md.track-1].length) + md.pregap, ti[md.track-1].length);
 982
 983                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
 984
 985                 sec2msf(frame_offset + md.pregap, ti[md.track].start);
 986                 sec2msf(md.frames, ti[md.track].length);
 987
 988                 ti[md.track].start_offset = file_offset;
 989
 990                 frame_offset += md.pregap + md.frames + md.postgap;
 991                 file_offset += md.frames + md.postgap;
 992                 numtracks++;
 993         }
 994
 995         if (numtracks)
 996                 return 0;
 997
 998 fail_io:
 999         if (chd_img != NULL) {
1000                 free(chd_img->buffer);
1001                 free(chd_img);
1002                 chd_img = NULL;
1003         }
1004         return -1;
1005 }
1006 #endif
1007
1008 // this function tries to get the .sub file of the given .img
1009 static int opensubfile(const char *isoname) {
1010         char            subname[MAXPATHLEN];
1011
1012         // copy name of the iso and change extension from .img to .sub
1013         strncpy(subname, isoname, sizeof(subname));
1014         subname[MAXPATHLEN - 1] = '\0';
1015         if (strlen(subname) >= 4) {
1016                 strcpy(subname + strlen(subname) - 4, ".sub");
1017         }
1018         else {
1019                 return -1;
1020         }
1021
1022         subHandle = fopen(subname, "rb");
1023         if (subHandle == NULL) {
1024                 return -1;
1025         }
1026
1027         return 0;
1028 }
1029
1030 static int opensbifile(const char *isoname) {
1031         char            sbiname[MAXPATHLEN];
1032         int             s;
1033
1034         strncpy(sbiname, isoname, sizeof(sbiname));
1035         sbiname[MAXPATHLEN - 1] = '\0';
1036         if (strlen(sbiname) >= 4) {
1037                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1038         }
1039         else {
1040                 return -1;
1041         }
1042
1043         fseek(cdHandle, 0, SEEK_END);
1044         s = ftell(cdHandle) / 2352;
1045
1046         return LoadSBI(sbiname, s);
1047 }
1048
1049 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1050 {
1051         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1052         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1053 }
1054
1055 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1056 {
1057         int ret;
1058
1059         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1060         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1061         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1062
1063         if (subChanRaw) DecodeRawSubData();
1064
1065         return ret;
1066 }
1067
1068 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1069 {
1070         static z_stream z;
1071         int ret = 0;
1072
1073         if (z.zalloc == NULL) {
1074                 // XXX: one-time leak here..
1075                 z.next_in = Z_NULL;
1076                 z.avail_in = 0;
1077                 z.zalloc = Z_NULL;
1078                 z.zfree = Z_NULL;
1079                 z.opaque = Z_NULL;
1080                 ret = inflateInit2(&z, -15);
1081         }
1082         else
1083                 ret = inflateReset(&z);
1084         if (ret != Z_OK)
1085                 return ret;
1086
1087         z.next_in = in;
1088         z.avail_in = in_size;
1089         z.next_out = out;
1090         z.avail_out = *out_size;
1091
1092         ret = inflate(&z, Z_NO_FLUSH);
1093         //inflateEnd(&z);
1094
1095         *out_size -= z.avail_out;
1096         return ret == 1 ? 0 : ret;
1097 }
1098
1099 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1100 {
1101         unsigned long cdbuffer_size, cdbuffer_size_expect;
1102         unsigned int size;
1103         int is_compressed;
1104         off_t start_byte;
1105         int ret, block;
1106
1107         if (base)
1108                 sector += base / 2352;
1109
1110         block = sector >> compr_img->block_shift;
1111         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1112
1113         if (block == compr_img->current_block) {
1114                 //printf("hit sect %d\n", sector);
1115                 goto finish;
1116         }
1117
1118         if (sector >= compr_img->index_len * 16) {
1119                 SysPrintf("sector %d is past img end\n", sector);
1120                 return -1;
1121         }
1122
1123         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1124         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1125                 SysPrintf("seek error for block %d at %llx: ",
1126                         block, (long long)start_byte);
1127                 perror(NULL);
1128                 return -1;
1129         }
1130
1131         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1132         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1133         if (size > sizeof(compr_img->buff_compressed)) {
1134                 SysPrintf("block %d is too large: %u\n", block, size);
1135                 return -1;
1136         }
1137
1138         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1139                                 1, size, cdHandle) != size) {
1140                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1141                 perror(NULL);
1142                 return -1;
1143         }
1144
1145         if (is_compressed) {
1146                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1147                 cdbuffer_size = cdbuffer_size_expect;
1148                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1149                 if (ret != 0) {
1150                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1151                                         ret, block, sector);
1152                         return -1;
1153                 }
1154                 if (cdbuffer_size != cdbuffer_size_expect)
1155                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1156                                         cdbuffer_size_expect, sector);
1157         }
1158
1159         // done at last!
1160         compr_img->current_block = block;
1161
1162 finish:
1163         if (dest != cdbuffer) // copy avoid HACK
1164                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1165                         CD_FRAMESIZE_RAW);
1166         return CD_FRAMESIZE_RAW;
1167 }
1168
1169 #ifdef HAVE_CHD
1170 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1171 {
1172         int hunk;
1173
1174         if (base)
1175                 sector += base;
1176
1177         hunk = sector / chd_img->sectors_per_hunk;
1178         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1179
1180         if (hunk != chd_img->current_hunk)
1181         {
1182                 chd_read(chd_img->chd, hunk, chd_img->buffer);
1183                 chd_img->current_hunk = hunk;
1184         }
1185
1186         if (dest != cdbuffer) // copy avoid HACK
1187                 memcpy(dest, chd_img->buffer[chd_img->sector_in_hunk],
1188                         CD_FRAMESIZE_RAW);
1189         return CD_FRAMESIZE_RAW;
1190 }
1191 #endif
1192
1193 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1194 {
1195         int ret;
1196
1197         fseek(f, base + sector * 2048, SEEK_SET);
1198         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1199
1200         // not really necessary, fake mode 2 header
1201         memset(cdbuffer, 0, 12 * 2);
1202         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1203         cdbuffer[12 + 3] = 1;
1204
1205         return ret;
1206 }
1207
1208 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1209         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1210 }
1211
1212 #ifdef HAVE_CHD
1213 static unsigned char *ISOgetBuffer_chd(void) {
1214         return chd_img->buffer[chd_img->sector_in_hunk] + 12;
1215 }
1216 #endif
1217
1218 static unsigned char * CALLBACK ISOgetBuffer(void) {
1219         return cdbuffer + 12;
1220 }
1221
1222 static void PrintTracks(void) {
1223         int i;
1224
1225         for (i = 1; i <= numtracks; i++) {
1226                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1227                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1228                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1229                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1230         }
1231 }
1232
1233 // This function is invoked by the front-end when opening an ISO
1234 // file for playback
1235 static long CALLBACK ISOopen(void) {
1236         boolean isMode1ISO = FALSE;
1237         char alt_bin_filename[MAXPATHLEN];
1238         const char *bin_filename;
1239
1240         if (cdHandle != NULL) {
1241                 return 0; // it's already open
1242         }
1243
1244         cdHandle = fopen(GetIsoFile(), "rb");
1245         if (cdHandle == NULL) {
1246                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1247                         GetIsoFile(), strerror(errno));
1248                 return -1;
1249         }
1250
1251         SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1252
1253         cddaBigEndian = FALSE;
1254         subChanMixed = FALSE;
1255         subChanRaw = FALSE;
1256         pregapOffset = 0;
1257         cdrIsoMultidiskCount = 1;
1258         multifile = 0;
1259
1260         CDR_getBuffer = ISOgetBuffer;
1261         cdimg_read_func = cdread_normal;
1262
1263         if (parsetoc(GetIsoFile()) == 0) {
1264                 SysPrintf("[+toc]");
1265         }
1266         else if (parseccd(GetIsoFile()) == 0) {
1267                 SysPrintf("[+ccd]");
1268         }
1269         else if (parsemds(GetIsoFile()) == 0) {
1270                 SysPrintf("[+mds]");
1271         }
1272         else if (parsecue(GetIsoFile()) == 0) {
1273                 SysPrintf("[+cue]");
1274         }
1275         if (handlepbp(GetIsoFile()) == 0) {
1276                 SysPrintf("[pbp]");
1277                 CDR_getBuffer = ISOgetBuffer_compr;
1278                 cdimg_read_func = cdread_compressed;
1279         }
1280         else if (handlecbin(GetIsoFile()) == 0) {
1281                 SysPrintf("[cbin]");
1282                 CDR_getBuffer = ISOgetBuffer_compr;
1283                 cdimg_read_func = cdread_compressed;
1284         }
1285
1286 #ifdef HAVE_CHD
1287         else if (handlechd(GetIsoFile()) == 0) {
1288                 printf("[chd]");
1289                 CDR_getBuffer = ISOgetBuffer_chd;
1290                 cdimg_read_func = cdread_chd;
1291         }
1292 #endif
1293
1294         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1295                 SysPrintf("[+sub]");
1296         }
1297         if (opensbifile(GetIsoFile()) == 0) {
1298                 SysPrintf("[+sbi]");
1299         }
1300
1301         fseeko(cdHandle, 0, SEEK_END);
1302
1303         // maybe user selected metadata file instead of main .bin ..
1304         bin_filename = GetIsoFile();
1305         if (ftello(cdHandle) < 2352 * 0x10) {
1306                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1307                 FILE *tmpf = NULL;
1308                 size_t i;
1309                 char *p;
1310
1311                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1312                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1313                 if (strlen(alt_bin_filename) >= 4) {
1314                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1315                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1316                                 strcpy(p, exts[i]);
1317                                 tmpf = fopen(alt_bin_filename, "rb");
1318                                 if (tmpf != NULL)
1319                                         break;
1320                         }
1321                 }
1322                 if (tmpf != NULL) {
1323                         bin_filename = alt_bin_filename;
1324                         fclose(cdHandle);
1325                         cdHandle = tmpf;
1326                         fseeko(cdHandle, 0, SEEK_END);
1327                 }
1328         }
1329
1330         // guess whether it is mode1/2048
1331         if (ftello(cdHandle) % 2048 == 0) {
1332                 unsigned int modeTest = 0;
1333                 fseek(cdHandle, 0, SEEK_SET);
1334                 fread(&modeTest, 4, 1, cdHandle);
1335                 if (SWAP32(modeTest) != 0xffffff00) {
1336                         SysPrintf("[2048]");
1337                         isMode1ISO = TRUE;
1338                 }
1339         }
1340         fseek(cdHandle, 0, SEEK_SET);
1341
1342         SysPrintf(".\n");
1343
1344         PrintTracks();
1345
1346         if (subChanMixed)
1347                 cdimg_read_func = cdread_sub_mixed;
1348         else if (isMode1ISO)
1349                 cdimg_read_func = cdread_2048;
1350
1351         // make sure we have another handle open for cdda
1352         if (numtracks > 1 && ti[1].handle == NULL) {
1353                 ti[1].handle = fopen(bin_filename, "rb");
1354         }
1355         cdda_cur_sector = 0;
1356         cdda_file_offset = 0;
1357
1358         return 0;
1359 }
1360
1361 static long CALLBACK ISOclose(void) {
1362         int i;
1363
1364         if (cdHandle != NULL) {
1365                 fclose(cdHandle);
1366                 cdHandle = NULL;
1367         }
1368         if (subHandle != NULL) {
1369                 fclose(subHandle);
1370                 subHandle = NULL;
1371         }
1372         stopCDDA();
1373         cddaHandle = NULL;
1374
1375         if (compr_img != NULL) {
1376                 free(compr_img->index_table);
1377                 free(compr_img);
1378                 compr_img = NULL;
1379         }
1380
1381 #ifdef HAVE_CHD
1382         if (chd_img != NULL) {
1383                 chd_close(chd_img->chd);
1384                 free(chd_img->buffer);
1385                 free(chd_img);
1386                 chd_img = NULL;
1387         }
1388 #endif
1389
1390         for (i = 1; i <= numtracks; i++) {
1391                 if (ti[i].handle != NULL) {
1392                         fclose(ti[i].handle);
1393                         ti[i].handle = NULL;
1394                 }
1395         }
1396         numtracks = 0;
1397         ti[1].type = 0;
1398         UnloadSBI();
1399
1400         memset(cdbuffer, 0, sizeof(cdbuffer));
1401         CDR_getBuffer = ISOgetBuffer;
1402
1403         return 0;
1404 }
1405
1406 static long CALLBACK ISOinit(void) {
1407         assert(cdHandle == NULL);
1408         assert(subHandle == NULL);
1409
1410         return 0; // do nothing
1411 }
1412
1413 static long CALLBACK ISOshutdown(void) {
1414         ISOclose();
1415         return 0;
1416 }
1417
1418 // return Starting and Ending Track
1419 // buffer:
1420 //  byte 0 - start track
1421 //  byte 1 - end track
1422 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1423         buffer[0] = 1;
1424
1425         if (numtracks > 0) {
1426                 buffer[1] = numtracks;
1427         }
1428         else {
1429                 buffer[1] = 1;
1430         }
1431
1432         return 0;
1433 }
1434
1435 // return Track Time
1436 // buffer:
1437 //  byte 0 - frame
1438 //  byte 1 - second
1439 //  byte 2 - minute
1440 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1441         if (track == 0) {
1442                 unsigned int sect;
1443                 unsigned char time[3];
1444                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1445                 sec2msf(sect, (char *)time);
1446                 buffer[2] = time[0];
1447                 buffer[1] = time[1];
1448                 buffer[0] = time[2];
1449         }
1450         else if (numtracks > 0 && track <= numtracks) {
1451                 buffer[2] = ti[track].start[0];
1452                 buffer[1] = ti[track].start[1];
1453                 buffer[0] = ti[track].start[2];
1454         }
1455         else {
1456                 buffer[2] = 0;
1457                 buffer[1] = 2;
1458                 buffer[0] = 0;
1459         }
1460
1461         return 0;
1462 }
1463
1464 // decode 'raw' subchannel data ripped by cdrdao
1465 static void DecodeRawSubData(void) {
1466         unsigned char subQData[12];
1467         int i;
1468
1469         memset(subQData, 0, sizeof(subQData));
1470
1471         for (i = 0; i < 8 * 12; i++) {
1472                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1473                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1474                 }
1475         }
1476
1477         memcpy(&subbuffer[12], subQData, 12);
1478 }
1479
1480 // read track
1481 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1482 // uses bcd format
1483 static boolean CALLBACK ISOreadTrack(unsigned char *time) {
1484         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1485         long ret;
1486
1487         if (cdHandle == NULL) {
1488                 return 0;
1489         }
1490
1491         if (pregapOffset) {
1492                 subChanMissing = FALSE;
1493                 if (sector >= pregapOffset) {
1494                         sector -= 2 * 75;
1495                         if (sector < pregapOffset)
1496                                 subChanMissing = TRUE;
1497                 }
1498         }
1499
1500         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1501         if (ret < 0)
1502                 return 0;
1503
1504         if (subHandle != NULL) {
1505                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1506                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1507
1508                 if (subChanRaw) DecodeRawSubData();
1509         }
1510
1511         return 1;
1512 }
1513
1514 // plays cdda audio
1515 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1516 // does NOT uses bcd format
1517 static long CALLBACK ISOplay(unsigned char *time) {
1518         playing = TRUE;
1519         return 0;
1520 }
1521
1522 // stops cdda audio
1523 static long CALLBACK ISOstop(void) {
1524         stopCDDA();
1525         return 0;
1526 }
1527
1528 // gets subchannel data
1529 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1530         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1531                 return subbuffer;
1532         }
1533
1534         return NULL;
1535 }
1536
1537 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1538         u32 sect;
1539
1540         CDR__getStatus(stat);
1541
1542         if (playing) {
1543                 stat->Type = 0x02;
1544                 stat->Status |= 0x80;
1545         }
1546         else {
1547                 // BIOS - boot ID (CD type)
1548                 stat->Type = ti[1].type;
1549         }
1550
1551         // relative -> absolute time
1552         sect = cddaCurPos;
1553         sec2msf(sect, (char *)stat->Time);
1554
1555         return 0;
1556 }
1557
1558 // read CDDA sector into buffer
1559 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1560         unsigned char msf[3] = {m, s, f};
1561         unsigned int file, track, track_start = 0;
1562         int ret;
1563
1564         cddaCurPos = msf2sec((char *)msf);
1565
1566         // find current track index
1567         for (track = numtracks; ; track--) {
1568                 track_start = msf2sec(ti[track].start);
1569                 if (track_start <= cddaCurPos)
1570                         break;
1571                 if (track == 1)
1572                         break;
1573         }
1574
1575         // data tracks play silent
1576         if (ti[track].type != CDDA) {
1577                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1578                 return 0;
1579         }
1580
1581         file = 1;
1582         if (multifile) {
1583                 // find the file that contains this track
1584                 for (file = track; file > 1; file--)
1585                         if (ti[file].handle != NULL)
1586                                 break;
1587         }
1588
1589         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1590                 buffer, cddaCurPos - track_start);
1591         if (ret != CD_FRAMESIZE_RAW) {
1592                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1593                 return -1;
1594         }
1595
1596         if (cddaBigEndian) {
1597                 int i;
1598                 unsigned char tmp;
1599
1600                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1601                         tmp = buffer[i * 2];
1602                         buffer[i * 2] = buffer[i * 2 + 1];
1603                         buffer[i * 2 + 1] = tmp;
1604                 }
1605         }
1606
1607         return 0;
1608 }
1609
1610 void cdrIsoInit(void) {
1611         CDR_init = ISOinit;
1612         CDR_shutdown = ISOshutdown;
1613         CDR_open = ISOopen;
1614         CDR_close = ISOclose;
1615         CDR_getTN = ISOgetTN;
1616         CDR_getTD = ISOgetTD;
1617         CDR_readTrack = ISOreadTrack;
1618         CDR_getBuffer = ISOgetBuffer;
1619         CDR_play = ISOplay;
1620         CDR_stop = ISOstop;
1621         CDR_getBufferSub = ISOgetBufferSub;
1622         CDR_getStatus = ISOgetStatus;
1623         CDR_readCDDA = ISOreadCDDA;
1624
1625         CDR_getDriveLetter = CDR__getDriveLetter;
1626         CDR_configure = CDR__configure;
1627         CDR_test = CDR__test;
1628         CDR_about = CDR__about;
1629         CDR_setfilename = CDR__setfilename;
1630
1631         numtracks = 0;
1632 }
1633
1634 int cdrIsoActive(void) {
1635         return (cdHandle != NULL);
1636 }