libpcsxcore/cdriso.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 PCSX-df Team                                       *
   3  *   Copyright (C) 2009 Wei Mingzhi                                        *
   4  *   Copyright (C) 2012 notaz                                              *
   5  *                                                                         *
   6  *   This program is free software; you can redistribute it and/or modify  *
   7  *   it under the terms of the GNU General Public License as published by  *
   8  *   the Free Software Foundation; either version 2 of the License, or     *
   9  *   (at your option) any later version.                                   *
  10  *                                                                         *
  11  *   This program is distributed in the hope that it will be useful,       *
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  14  *   GNU General Public License for more details.                          *
  15  *                                                                         *
  16  *   You should have received a copy of the GNU General Public License     *
  17  *   along with this program; if not, write to the                         *
  18  *   Free Software Foundation, Inc.,                                       *
  19  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  20  ***************************************************************************/
  21
  22 #include "psxcommon.h"
  23 #include "plugins.h"
  24 #include "cdrom.h"
  25 #include "cdriso.h"
  26 #include "ppf.h"
  27
  28 #include <errno.h>
  29 #include <zlib.h>
  30 #include <chd.h>
  31
  32 #ifdef _WIN32
  33 #define WIN32_LEAN_AND_MEAN
  34 #include <process.h>
  35 #include <windows.h>
  36 #define strcasecmp _stricmp
  37 #define usleep(x) (Sleep((x) / 1000))
  38 #else
  39 #include <pthread.h>
  40 #include <sys/time.h>
  41 #include <unistd.h>
  42 #endif
  43
  44 #define OFF_T_MSB ((off_t)1 << (sizeof(off_t) * 8 - 1))
  45
  46 unsigned int cdrIsoMultidiskCount;
  47 unsigned int cdrIsoMultidiskSelect;
  48
  49 static FILE *cdHandle = NULL;
  50 static FILE *cddaHandle = NULL;
  51 static FILE *subHandle = NULL;
  52
  53 static boolean subChanMixed = FALSE;
  54 static boolean subChanRaw = FALSE;
  55 static boolean subChanMissing = FALSE;
  56
  57 static boolean multifile = FALSE;
  58
  59 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
  60 static unsigned char subbuffer[SUB_FRAMESIZE];
  61
  62 static unsigned char sndbuffer[CD_FRAMESIZE_RAW * 10];
  63
  64 #define CDDA_FRAMETIME                  (1000 * (sizeof(sndbuffer) / CD_FRAMESIZE_RAW) / 75)
  65
  66 #ifdef _WIN32
  67 static HANDLE threadid;
  68 #else
  69 static pthread_t threadid;
  70 #endif
  71 static unsigned int initial_offset = 0;
  72 static boolean playing = FALSE;
  73 static boolean cddaBigEndian = FALSE;
  74 // cdda sectors in toc, byte offset in file
  75 static unsigned int cdda_cur_sector;
  76 static unsigned int cdda_first_sector;
  77 static unsigned int cdda_file_offset;
  78 /* Frame offset into CD image where pregap data would be found if it was there.
  79  * If a game seeks there we must *not* return subchannel data since it's
  80  * not in the CD image, so that cdrom code can fake subchannel data instead.
  81  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  82 static unsigned int pregapOffset;
  83
  84 #define cddaCurPos cdda_cur_sector
  85
  86 // compressed image stuff
  87 static struct {
  88         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  89         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  90         off_t *index_table;
  91         unsigned int index_len;
  92         unsigned int block_shift;
  93         unsigned int current_block;
  94         unsigned int sector_in_blk;
  95 } *compr_img;
  96
  97 static struct {
  98         unsigned char (*buffer)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE];
  99         chd_file* chd;
 100         const chd_header* header;
 101         unsigned int sectors_per_hunk;
 102         unsigned int current_hunk;
 103         unsigned int sector_in_hunk;
 104 } *chd_img;
 105
 106 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
 107
 108 char* CALLBACK CDR__getDriveLetter(void);
 109 long CALLBACK CDR__configure(void);
 110 long CALLBACK CDR__test(void);
 111 void CALLBACK CDR__about(void);
 112 long CALLBACK CDR__setfilename(char *filename);
 113 long CALLBACK CDR__getStatus(struct CdrStat *stat);
 114
 115 static void DecodeRawSubData(void);
 116
 117 struct trackinfo {
 118         enum {DATA=1, CDDA} type;
 119         char start[3];          // MSF-format
 120         char length[3];         // MSF-format
 121         FILE *handle;           // for multi-track images CDDA
 122         unsigned int start_offset; // byte offset from start of above file
 123 };
 124
 125 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 126
 127 static int numtracks = 0;
 128 static struct trackinfo ti[MAXTRACKS];
 129
 130 // get a sector from a msf-array
 131 static unsigned int msf2sec(char *msf) {
 132         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 133 }
 134
 135 static void sec2msf(unsigned int s, char *msf) {
 136         msf[0] = s / 75 / 60;
 137         s = s - msf[0] * 75 * 60;
 138         msf[1] = s / 75;
 139         s = s - msf[1] * 75;
 140         msf[2] = s;
 141 }
 142
 143 // divide a string of xx:yy:zz into m, s, f
 144 static void tok2msf(char *time, char *msf) {
 145         char *token;
 146
 147         token = strtok(time, ":");
 148         if (token) {
 149                 msf[0] = atoi(token);
 150         }
 151         else {
 152                 msf[0] = 0;
 153         }
 154
 155         token = strtok(NULL, ":");
 156         if (token) {
 157                 msf[1] = atoi(token);
 158         }
 159         else {
 160                 msf[1] = 0;
 161         }
 162
 163         token = strtok(NULL, ":");
 164         if (token) {
 165                 msf[2] = atoi(token);
 166         }
 167         else {
 168                 msf[2] = 0;
 169         }
 170 }
 171
 172 #ifndef _WIN32
 173 static long GetTickCount(void) {
 174         static time_t           initial_time = 0;
 175         struct timeval          now;
 176
 177         gettimeofday(&now, NULL);
 178
 179         if (initial_time == 0) {
 180                 initial_time = now.tv_sec;
 181         }
 182
 183         return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
 184 }
 185 #endif
 186
 187 // this thread plays audio data
 188 #ifdef _WIN32
 189 static void playthread(void *param)
 190 #else
 191 static void *playthread(void *param)
 192 #endif
 193 {
 194         long osleep, d, t, i, s;
 195         unsigned char   tmp;
 196         int ret = 0, sector_offs;
 197
 198         t = GetTickCount();
 199
 200         while (playing) {
 201                 s = 0;
 202                 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
 203                         sector_offs = cdda_cur_sector - cdda_first_sector;
 204                         if (sector_offs < 0) {
 205                                 d = CD_FRAMESIZE_RAW;
 206                                 memset(sndbuffer + s, 0, d);
 207                         }
 208                         else {
 209                                 d = cdimg_read_func(cddaHandle, cdda_file_offset,
 210                                         sndbuffer + s, sector_offs);
 211                                 if (d < CD_FRAMESIZE_RAW)
 212                                         break;
 213                         }
 214
 215                         s += d;
 216                         cdda_cur_sector++;
 217                 }
 218
 219                 if (s == 0) {
 220                         playing = FALSE;
 221                         initial_offset = 0;
 222                         break;
 223                 }
 224
 225                 if (!cdr.Muted && playing) {
 226                         if (cddaBigEndian) {
 227                                 for (i = 0; i < s / 2; i++) {
 228                                         tmp = sndbuffer[i * 2];
 229                                         sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
 230                                         sndbuffer[i * 2 + 1] = tmp;
 231                                 }
 232                         }
 233
 234                         // can't do it yet due to readahead..
 235                         //cdrAttenuate((short *)sndbuffer, s / 4, 1);
 236                         do {
 237                                 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
 238                                 if (ret == 0x7761)
 239             {
 240                                         usleep(6 * 1000);
 241             }
 242                         } while (ret == 0x7761 && playing); // rearmed_wait
 243                 }
 244
 245                 if (ret != 0x676f) { // !rearmed_go
 246                         // do approx sleep
 247                         long now;
 248
 249                         // HACK: stop feeding data while emu is paused
 250                         extern int stop;
 251                         while (stop && playing)
 252          {
 253                                 usleep(10000);
 254          }
 255
 256                         now = GetTickCount();
 257                         osleep = t - now;
 258                         if (osleep <= 0) {
 259                                 osleep = 1;
 260                                 t = now;
 261                         }
 262                         else if (osleep > CDDA_FRAMETIME) {
 263                                 osleep = CDDA_FRAMETIME;
 264                                 t = now;
 265                         }
 266
 267                         usleep(osleep * 1000);
 268                         t += CDDA_FRAMETIME;
 269                 }
 270
 271         }
 272
 273 #ifdef _WIN32
 274         _endthread();
 275 #else
 276         pthread_exit(0);
 277         return NULL;
 278 #endif
 279 }
 280
 281 // stop the CDDA playback
 282 static void stopCDDA() {
 283         if (!playing) {
 284                 return;
 285         }
 286
 287         playing = FALSE;
 288 #ifdef _WIN32
 289         WaitForSingleObject(threadid, INFINITE);
 290 #else
 291         pthread_join(threadid, NULL);
 292 #endif
 293 }
 294
 295 // start the CDDA playback
 296 static void startCDDA(void) {
 297         if (playing) {
 298                 stopCDDA();
 299         }
 300
 301         playing = TRUE;
 302
 303 #ifdef _WIN32
 304         threadid = (HANDLE)_beginthread(playthread, 0, NULL);
 305 #else
 306         pthread_create(&threadid, NULL, playthread, NULL);
 307 #endif
 308 }
 309
 310 // this function tries to get the .toc file of the given .bin
 311 // the necessary data is put into the ti (trackinformation)-array
 312 static int parsetoc(const char *isofile) {
 313         char                    tocname[MAXPATHLEN];
 314         FILE                    *fi;
 315         char                    linebuf[256], tmp[256], name[256];
 316         char                    *token;
 317         char                    time[20], time2[20];
 318         unsigned int    t, sector_offs, sector_size;
 319         unsigned int    current_zero_gap = 0;
 320
 321         numtracks = 0;
 322
 323         // copy name of the iso and change extension from .bin to .toc
 324         strncpy(tocname, isofile, sizeof(tocname));
 325         tocname[MAXPATHLEN - 1] = '\0';
 326         if (strlen(tocname) >= 4) {
 327                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 328         }
 329         else {
 330                 return -1;
 331         }
 332
 333         if ((fi = fopen(tocname, "r")) == NULL) {
 334                 // try changing extension to .cue (to satisfy some stupid tutorials)
 335                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 336                 if ((fi = fopen(tocname, "r")) == NULL) {
 337                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 338                         strcpy(tocname, isofile);
 339                         t = strlen(tocname);
 340                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 341                                 tocname[t - 4] = '\0';
 342                                 if ((fi = fopen(tocname, "r")) == NULL) {
 343                                         return -1;
 344                                 }
 345                         }
 346                         else {
 347                                 return -1;
 348                         }
 349                 }
 350                 // check if it's really a TOC named as a .cue
 351                 fgets(linebuf, sizeof(linebuf), fi);
 352                 token = strtok(linebuf, " ");
 353                 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 354                         fclose(fi);
 355                         return -1;
 356                 }
 357                 fseek(fi, 0, SEEK_SET);
 358         }
 359
 360         memset(&ti, 0, sizeof(ti));
 361         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 362
 363         sector_size = CD_FRAMESIZE_RAW;
 364         sector_offs = 2 * 75;
 365
 366         // parse the .toc file
 367         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 368                 // search for tracks
 369                 strncpy(tmp, linebuf, sizeof(linebuf));
 370                 token = strtok(tmp, " ");
 371
 372                 if (token == NULL) continue;
 373
 374                 if (!strcmp(token, "TRACK")) {
 375                         sector_offs += current_zero_gap;
 376                         current_zero_gap = 0;
 377
 378                         // get type of track
 379                         token = strtok(NULL, " ");
 380                         numtracks++;
 381
 382                         if (!strncmp(token, "MODE2_RAW", 9)) {
 383                                 ti[numtracks].type = DATA;
 384                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 385
 386                                 // check if this image contains mixed subchannel data
 387                                 token = strtok(NULL, " ");
 388                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 389                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 390                                         subChanMixed = TRUE;
 391                                         if (!strncmp(token, "RW_RAW", 6))
 392                                                 subChanRaw = TRUE;
 393                                 }
 394                         }
 395                         else if (!strncmp(token, "AUDIO", 5)) {
 396                                 ti[numtracks].type = CDDA;
 397                         }
 398                 }
 399                 else if (!strcmp(token, "DATAFILE")) {
 400                         if (ti[numtracks].type == CDDA) {
 401                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 402                                 ti[numtracks].start_offset = t;
 403                                 t = t / sector_size + sector_offs;
 404                                 sec2msf(t, (char *)&ti[numtracks].start);
 405                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 406                         }
 407                         else {
 408                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 409                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 410                         }
 411                 }
 412                 else if (!strcmp(token, "FILE")) {
 413                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 414                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 415                         t += msf2sec(ti[numtracks].start) * sector_size;
 416                         ti[numtracks].start_offset = t;
 417                         t = t / sector_size + sector_offs;
 418                         sec2msf(t, (char *)&ti[numtracks].start);
 419                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 420                 }
 421                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 422                         // skip unneeded optional fields
 423                         while (token != NULL) {
 424                                 token = strtok(NULL, " ");
 425                                 if (strchr(token, ':') != NULL)
 426                                         break;
 427                         }
 428                         if (token != NULL) {
 429                                 tok2msf(token, tmp);
 430                                 current_zero_gap = msf2sec(tmp);
 431                         }
 432                         if (numtracks > 1) {
 433                                 t = ti[numtracks - 1].start_offset;
 434                                 t /= sector_size;
 435                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 436                         }
 437                 }
 438                 else if (!strcmp(token, "START")) {
 439                         token = strtok(NULL, " ");
 440                         if (token != NULL && strchr(token, ':')) {
 441                                 tok2msf(token, tmp);
 442                                 t = msf2sec(tmp);
 443                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 444                                 t = msf2sec(ti[numtracks].start) + t;
 445                                 sec2msf(t, (char *)&ti[numtracks].start);
 446                         }
 447                 }
 448         }
 449
 450         fclose(fi);
 451
 452         return 0;
 453 }
 454
 455 // this function tries to get the .cue file of the given .bin
 456 // the necessary data is put into the ti (trackinformation)-array
 457 static int parsecue(const char *isofile) {
 458         char                    cuename[MAXPATHLEN];
 459         char                    filepath[MAXPATHLEN];
 460         char                    *incue_fname;
 461         FILE                    *fi;
 462         char                    *token;
 463         char                    time[20];
 464         char                    *tmp;
 465         char                    linebuf[256], tmpb[256], dummy[256];
 466         unsigned int    incue_max_len;
 467         unsigned int    t, file_len, mode, sector_offs;
 468         unsigned int    sector_size = 2352;
 469
 470         numtracks = 0;
 471
 472         // copy name of the iso and change extension from .bin to .cue
 473         strncpy(cuename, isofile, sizeof(cuename));
 474         cuename[MAXPATHLEN - 1] = '\0';
 475         if (strlen(cuename) >= 4) {
 476                 strcpy(cuename + strlen(cuename) - 4, ".cue");
 477         }
 478         else {
 479                 return -1;
 480         }
 481
 482         if ((fi = fopen(cuename, "r")) == NULL) {
 483                 return -1;
 484         }
 485
 486         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 487         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 488         // that...
 489         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 490                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 491                         // Don't proceed further, as this is actually a .toc file rather
 492                         // than a .cue file.
 493                         fclose(fi);
 494                         return parsetoc(isofile);
 495                 }
 496                 fseek(fi, 0, SEEK_SET);
 497         }
 498
 499         // build a path for files referenced in .cue
 500         strncpy(filepath, cuename, sizeof(filepath));
 501         tmp = strrchr(filepath, '/');
 502         if (tmp == NULL)
 503                 tmp = strrchr(filepath, '\\');
 504         if (tmp != NULL)
 505                 tmp++;
 506         else
 507                 tmp = filepath;
 508         *tmp = 0;
 509         filepath[sizeof(filepath) - 1] = 0;
 510         incue_fname = tmp;
 511         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 512
 513         memset(&ti, 0, sizeof(ti));
 514
 515         file_len = 0;
 516         sector_offs = 2 * 75;
 517
 518         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 519                 strncpy(dummy, linebuf, sizeof(linebuf));
 520                 token = strtok(dummy, " ");
 521
 522                 if (token == NULL) {
 523                         continue;
 524                 }
 525
 526                 if (!strcmp(token, "TRACK")) {
 527                         numtracks++;
 528
 529                         sector_size = 0;
 530                         if (strstr(linebuf, "AUDIO") != NULL) {
 531                                 ti[numtracks].type = CDDA;
 532                                 sector_size = 2352;
 533                         }
 534                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 535                                 ti[numtracks].type = DATA;
 536                         else {
 537                                 SysPrintf(".cue: failed to parse TRACK\n");
 538                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 539                         }
 540                         if (sector_size == 0)
 541                                 sector_size = 2352;
 542                 }
 543                 else if (!strcmp(token, "INDEX")) {
 544                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 545                                 SysPrintf(".cue: failed to parse INDEX\n");
 546                         tok2msf(time, (char *)&ti[numtracks].start);
 547
 548                         t = msf2sec(ti[numtracks].start);
 549                         ti[numtracks].start_offset = t * sector_size;
 550                         t += sector_offs;
 551                         sec2msf(t, ti[numtracks].start);
 552
 553                         // default track length to file length
 554                         t = file_len - ti[numtracks].start_offset / sector_size;
 555                         sec2msf(t, ti[numtracks].length);
 556
 557                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 558                                 // this track uses the same file as the last,
 559                                 // start of this track is last track's end
 560                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 561                                 sec2msf(t, ti[numtracks - 1].length);
 562                         }
 563                         if (numtracks > 1 && pregapOffset == -1)
 564                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 565                 }
 566                 else if (!strcmp(token, "PREGAP")) {
 567                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 568                                 tok2msf(time, dummy);
 569                                 sector_offs += msf2sec(dummy);
 570                         }
 571                         pregapOffset = -1; // mark to fill track start_offset
 572                 }
 573                 else if (!strcmp(token, "FILE")) {
 574                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 575                         if (t != 1)
 576                                 sscanf(linebuf, " FILE %255s", tmpb);
 577
 578                         tmp = strrchr(tmpb, '\\');
 579                         if (tmp == NULL)
 580                                 tmp = strrchr(tmpb, '/');
 581                         if (tmp != NULL)
 582                                 tmp++;
 583                         else
 584                                 tmp = tmpb;
 585                         strncpy(incue_fname, tmp, incue_max_len);
 586                         ti[numtracks + 1].handle = fopen(filepath, "rb");
 587
 588                         // update global offset if this is not first file in this .cue
 589                         if (numtracks + 1 > 1) {
 590                                 multifile = 1;
 591                                 sector_offs += file_len;
 592                         }
 593
 594                         file_len = 0;
 595                         if (ti[numtracks + 1].handle == NULL) {
 596                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 597                                 continue;
 598                         }
 599                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 600                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 601
 602                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 603                                 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
 604                         {
 605                                 // user selected .cue as image file, use it's data track instead
 606                                 fclose(cdHandle);
 607                                 cdHandle = fopen(filepath, "rb");
 608                         }
 609                 }
 610         }
 611
 612         fclose(fi);
 613
 614         return 0;
 615 }
 616
 617 // this function tries to get the .ccd file of the given .img
 618 // the necessary data is put into the ti (trackinformation)-array
 619 static int parseccd(const char *isofile) {
 620         char                    ccdname[MAXPATHLEN];
 621         FILE                    *fi;
 622         char                    linebuf[256];
 623         unsigned int    t;
 624
 625         numtracks = 0;
 626
 627         // copy name of the iso and change extension from .img to .ccd
 628         strncpy(ccdname, isofile, sizeof(ccdname));
 629         ccdname[MAXPATHLEN - 1] = '\0';
 630         if (strlen(ccdname) >= 4) {
 631                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 632         }
 633         else {
 634                 return -1;
 635         }
 636
 637         if ((fi = fopen(ccdname, "r")) == NULL) {
 638                 return -1;
 639         }
 640
 641         memset(&ti, 0, sizeof(ti));
 642
 643         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 644                 if (!strncmp(linebuf, "[TRACK", 6)){
 645                         numtracks++;
 646                 }
 647                 else if (!strncmp(linebuf, "MODE=", 5)) {
 648                         sscanf(linebuf, "MODE=%d", &t);
 649                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 650                 }
 651                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 652                         sscanf(linebuf, "INDEX 1=%d", &t);
 653                         sec2msf(t + 2 * 75, ti[numtracks].start);
 654                         ti[numtracks].start_offset = t * 2352;
 655
 656                         // If we've already seen another track, this is its end
 657                         if (numtracks > 1) {
 658                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 659                                 sec2msf(t, ti[numtracks - 1].length);
 660                         }
 661                 }
 662         }
 663
 664         fclose(fi);
 665
 666         // Fill out the last track's end based on size
 667         if (numtracks >= 1) {
 668                 fseek(cdHandle, 0, SEEK_END);
 669                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 670                 sec2msf(t, ti[numtracks].length);
 671         }
 672
 673         return 0;
 674 }
 675
 676 // this function tries to get the .mds file of the given .mdf
 677 // the necessary data is put into the ti (trackinformation)-array
 678 static int parsemds(const char *isofile) {
 679         char                    mdsname[MAXPATHLEN];
 680         FILE                    *fi;
 681         unsigned int    offset, extra_offset, l, i;
 682         unsigned short  s;
 683
 684         numtracks = 0;
 685
 686         // copy name of the iso and change extension from .mdf to .mds
 687         strncpy(mdsname, isofile, sizeof(mdsname));
 688         mdsname[MAXPATHLEN - 1] = '\0';
 689         if (strlen(mdsname) >= 4) {
 690                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 691         }
 692         else {
 693                 return -1;
 694         }
 695
 696         if ((fi = fopen(mdsname, "rb")) == NULL) {
 697                 return -1;
 698         }
 699
 700         memset(&ti, 0, sizeof(ti));
 701
 702         // check if it's a valid mds file
 703         fread(&i, 1, sizeof(unsigned int), fi);
 704         i = SWAP32(i);
 705         if (i != 0x4944454D) {
 706                 // not an valid mds file
 707                 fclose(fi);
 708                 return -1;
 709         }
 710
 711         // get offset to session block
 712         fseek(fi, 0x50, SEEK_SET);
 713         fread(&offset, 1, sizeof(unsigned int), fi);
 714         offset = SWAP32(offset);
 715
 716         // get total number of tracks
 717         offset += 14;
 718         fseek(fi, offset, SEEK_SET);
 719         fread(&s, 1, sizeof(unsigned short), fi);
 720         s = SWAP16(s);
 721         numtracks = s;
 722
 723         // get offset to track blocks
 724         fseek(fi, 4, SEEK_CUR);
 725         fread(&offset, 1, sizeof(unsigned int), fi);
 726         offset = SWAP32(offset);
 727
 728         // skip lead-in data
 729         while (1) {
 730                 fseek(fi, offset + 4, SEEK_SET);
 731                 if (fgetc(fi) < 0xA0) {
 732                         break;
 733                 }
 734                 offset += 0x50;
 735         }
 736
 737         // check if the image contains mixed subchannel data
 738         fseek(fi, offset + 1, SEEK_SET);
 739         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 740
 741         // read track data
 742         for (i = 1; i <= numtracks; i++) {
 743                 fseek(fi, offset, SEEK_SET);
 744
 745                 // get the track type
 746                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 747                 fseek(fi, 8, SEEK_CUR);
 748
 749                 // get the track starting point
 750                 ti[i].start[0] = fgetc(fi);
 751                 ti[i].start[1] = fgetc(fi);
 752                 ti[i].start[2] = fgetc(fi);
 753
 754                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 755                 extra_offset = SWAP32(extra_offset);
 756
 757                 // get track start offset (in .mdf)
 758                 fseek(fi, offset + 0x28, SEEK_SET);
 759                 fread(&l, 1, sizeof(unsigned int), fi);
 760                 l = SWAP32(l);
 761                 ti[i].start_offset = l;
 762
 763                 // get pregap
 764                 fseek(fi, extra_offset, SEEK_SET);
 765                 fread(&l, 1, sizeof(unsigned int), fi);
 766                 l = SWAP32(l);
 767                 if (l != 0 && i > 1)
 768                         pregapOffset = msf2sec(ti[i].start);
 769
 770                 // get the track length
 771                 fread(&l, 1, sizeof(unsigned int), fi);
 772                 l = SWAP32(l);
 773                 sec2msf(l, ti[i].length);
 774
 775                 offset += 0x50;
 776         }
 777
 778         fclose(fi);
 779         return 0;
 780 }
 781
 782 static int handlepbp(const char *isofile) {
 783         struct {
 784                 unsigned int sig;
 785                 unsigned int dontcare[8];
 786                 unsigned int psar_offs;
 787         } pbp_hdr;
 788         struct {
 789                 unsigned char type;
 790                 unsigned char pad0;
 791                 unsigned char track;
 792                 char index0[3];
 793                 char pad1;
 794                 char index1[3];
 795         } toc_entry;
 796         struct {
 797                 unsigned int offset;
 798                 unsigned int size;
 799                 unsigned int dontcare[6];
 800         } index_entry;
 801         char psar_sig[11];
 802         off_t psisoimg_offs, cdimg_base;
 803         unsigned int t, cd_length;
 804         unsigned int offsettab[8];
 805         const char *ext = NULL;
 806         int i, ret;
 807
 808         if (strlen(isofile) >= 4)
 809                 ext = isofile + strlen(isofile) - 4;
 810         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 811                 return -1;
 812
 813         fseeko(cdHandle, 0, SEEK_SET);
 814
 815         numtracks = 0;
 816
 817         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 818         if (ret != sizeof(pbp_hdr)) {
 819                 SysPrintf("failed to read pbp\n");
 820                 goto fail_io;
 821         }
 822
 823         ret = fseeko(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 824         if (ret != 0) {
 825                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 826                 goto fail_io;
 827         }
 828
 829         psisoimg_offs = pbp_hdr.psar_offs;
 830         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 831         psar_sig[10] = 0;
 832         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 833                 // multidisk image?
 834                 ret = fseeko(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 835                 if (ret != 0) {
 836                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 837                         goto fail_io;
 838                 }
 839
 840                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 841                         SysPrintf("failed to read offsettab\n");
 842                         goto fail_io;
 843                 }
 844
 845                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 846                         if (offsettab[i] == 0)
 847                                 break;
 848                 }
 849                 cdrIsoMultidiskCount = i;
 850                 if (cdrIsoMultidiskCount == 0) {
 851                         SysPrintf("multidisk eboot has 0 images?\n");
 852                         goto fail_io;
 853                 }
 854
 855                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 856                         cdrIsoMultidiskSelect = 0;
 857
 858                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 859
 860                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 861                 if (ret != 0) {
 862                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 863                         goto fail_io;
 864                 }
 865
 866                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 867                 psar_sig[10] = 0;
 868         }
 869
 870         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 871                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 872                 goto fail_io;
 873         }
 874
 875         // seek to TOC
 876         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 877         if (ret != 0) {
 878                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 879                 goto fail_io;
 880         }
 881
 882         // first 3 entries are special
 883         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 884         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 885         numtracks = btoi(toc_entry.index1[0]);
 886
 887         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 888         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 889                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 890
 891         for (i = 1; i <= numtracks; i++) {
 892                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 893
 894                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 895
 896                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 897                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 898                 ti[i].start_offset *= 2352;
 899                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 900                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 901                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 902
 903                 if (i > 1) {
 904                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 905                         sec2msf(t, ti[i - 1].length);
 906                 }
 907         }
 908         t = cd_length - ti[numtracks].start_offset / 2352;
 909         sec2msf(t, ti[numtracks].length);
 910
 911         // seek to ISO index
 912         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 913         if (ret != 0) {
 914                 SysPrintf("failed to seek to ISO index\n");
 915                 goto fail_io;
 916         }
 917
 918         compr_img = calloc(1, sizeof(*compr_img));
 919         if (compr_img == NULL)
 920                 goto fail_io;
 921
 922         compr_img->block_shift = 4;
 923         compr_img->current_block = (unsigned int)-1;
 924
 925         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 926         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 927         if (compr_img->index_table == NULL)
 928                 goto fail_io;
 929
 930         cdimg_base = psisoimg_offs + 0x100000;
 931         for (i = 0; i < compr_img->index_len; i++) {
 932                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 933                 if (ret != sizeof(index_entry)) {
 934                         SysPrintf("failed to read index_entry #%d\n", i);
 935                         goto fail_index;
 936                 }
 937
 938                 if (index_entry.size == 0)
 939                         break;
 940
 941                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 942         }
 943         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 944
 945         return 0;
 946
 947 fail_index:
 948         free(compr_img->index_table);
 949         compr_img->index_table = NULL;
 950 fail_io:
 951         if (compr_img != NULL) {
 952                 free(compr_img);
 953                 compr_img = NULL;
 954         }
 955         return -1;
 956 }
 957
 958 static int handlecbin(const char *isofile) {
 959         struct
 960         {
 961                 char magic[4];
 962                 unsigned int header_size;
 963                 unsigned long long total_bytes;
 964                 unsigned int block_size;
 965                 unsigned char ver;              // 1
 966                 unsigned char align;
 967                 unsigned char rsv_06[2];
 968         } ciso_hdr;
 969         const char *ext = NULL;
 970         unsigned int *index_table = NULL;
 971         unsigned int index = 0, plain;
 972         int i, ret;
 973
 974         if (strlen(isofile) >= 5)
 975                 ext = isofile + strlen(isofile) - 5;
 976         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 977                 return -1;
 978
 979         fseek(cdHandle, 0, SEEK_SET);
 980
 981         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 982         if (ret != sizeof(ciso_hdr)) {
 983                 SysPrintf("failed to read ciso header\n");
 984                 return -1;
 985         }
 986
 987         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 988                 SysPrintf("bad ciso header\n");
 989                 return -1;
 990         }
 991         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 992                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
 993                 if (ret != 0) {
 994                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 995                         return -1;
 996                 }
 997         }
 998
 999         compr_img = calloc(1, sizeof(*compr_img));
1000         if (compr_img == NULL)
1001                 goto fail_io;
1002
1003         compr_img->block_shift = 0;
1004         compr_img->current_block = (unsigned int)-1;
1005
1006         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
1007         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
1008         if (index_table == NULL)
1009                 goto fail_io;
1010
1011         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
1012         if (ret != compr_img->index_len) {
1013                 SysPrintf("failed to read index table\n");
1014                 goto fail_index;
1015         }
1016
1017         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
1018         if (compr_img->index_table == NULL)
1019                 goto fail_index;
1020
1021         for (i = 0; i < compr_img->index_len + 1; i++) {
1022                 index = index_table[i];
1023                 plain = index & 0x80000000;
1024                 index &= 0x7fffffff;
1025                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
1026                 if (plain)
1027                         compr_img->index_table[i] |= OFF_T_MSB;
1028         }
1029
1030         return 0;
1031
1032 fail_index:
1033         free(index_table);
1034 fail_io:
1035         if (compr_img != NULL) {
1036                 free(compr_img);
1037                 compr_img = NULL;
1038         }
1039         return -1;
1040 }
1041
1042 static int handlechd(const char *isofile) {
1043         chd_img = calloc(1, sizeof(*chd_img));
1044         if (chd_img == NULL)
1045                 goto fail_io;
1046
1047         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
1048       goto fail_io;
1049
1050    chd_img->header = chd_get_header(chd_img->chd);
1051
1052    chd_img->buffer = malloc(chd_img->header->hunkbytes);
1053    if (chd_img->buffer == NULL)
1054                 goto fail_io;
1055
1056    chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
1057    chd_img->current_hunk = (unsigned int)-1;
1058
1059    cddaBigEndian = TRUE;
1060
1061         numtracks = 0;
1062         int frame_offset = 150;
1063         memset(ti, 0, sizeof(ti));
1064
1065    while (1)
1066    {
1067       struct {
1068          char type[64];
1069          char subtype[32];
1070          char pgtype[32];
1071          char pgsub[32];
1072          uint32_t track;
1073          uint32_t frames;
1074          uint32_t pregap;
1075          uint32_t postgap;
1076       } md = {};
1077       char meta[256];
1078       uint32_t meta_size = 0;
1079
1080       if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
1081          sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
1082       else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
1083          sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
1084       else
1085          break;
1086
1087                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
1088
1089       sec2msf(frame_offset + md.pregap, ti[md.track].start);
1090       sec2msf(md.frames - md.pregap, ti[md.track].length);
1091
1092       if (!strcmp(md.type, md.pgtype))
1093          frame_offset += md.pregap;
1094
1095       ti[md.track].start_offset = frame_offset * CD_FRAMESIZE_RAW;
1096
1097                 frame_offset += md.frames;
1098                 frame_offset += md.postgap;
1099                 numtracks++;
1100         }
1101
1102         if (numtracks)
1103                 return 0;
1104
1105 fail_io:
1106         if (chd_img != NULL) {
1107                 free(chd_img->buffer);
1108                 free(chd_img);
1109                 chd_img = NULL;
1110         }
1111         return -1;
1112 }
1113
1114 // this function tries to get the .sub file of the given .img
1115 static int opensubfile(const char *isoname) {
1116         char            subname[MAXPATHLEN];
1117
1118         // copy name of the iso and change extension from .img to .sub
1119         strncpy(subname, isoname, sizeof(subname));
1120         subname[MAXPATHLEN - 1] = '\0';
1121         if (strlen(subname) >= 4) {
1122                 strcpy(subname + strlen(subname) - 4, ".sub");
1123         }
1124         else {
1125                 return -1;
1126         }
1127
1128         subHandle = fopen(subname, "rb");
1129         if (subHandle == NULL) {
1130                 return -1;
1131         }
1132
1133         return 0;
1134 }
1135
1136 static int opensbifile(const char *isoname) {
1137         char            sbiname[MAXPATHLEN];
1138         int             s;
1139
1140         strncpy(sbiname, isoname, sizeof(sbiname));
1141         sbiname[MAXPATHLEN - 1] = '\0';
1142         if (strlen(sbiname) >= 4) {
1143                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1144         }
1145         else {
1146                 return -1;
1147         }
1148
1149         fseek(cdHandle, 0, SEEK_END);
1150         s = ftell(cdHandle) / 2352;
1151
1152         return LoadSBI(sbiname, s);
1153 }
1154
1155 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1156 {
1157         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1158         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1159 }
1160
1161 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1162 {
1163         int ret;
1164
1165         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1166         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1167         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1168
1169         if (subChanRaw) DecodeRawSubData();
1170
1171         return ret;
1172 }
1173
1174 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1175 {
1176         static z_stream z;
1177         int ret = 0;
1178
1179         if (z.zalloc == NULL) {
1180                 // XXX: one-time leak here..
1181                 z.next_in = Z_NULL;
1182                 z.avail_in = 0;
1183                 z.zalloc = Z_NULL;
1184                 z.zfree = Z_NULL;
1185                 z.opaque = Z_NULL;
1186                 ret = inflateInit2(&z, -15);
1187         }
1188         else
1189                 ret = inflateReset(&z);
1190         if (ret != Z_OK)
1191                 return ret;
1192
1193         z.next_in = in;
1194         z.avail_in = in_size;
1195         z.next_out = out;
1196         z.avail_out = *out_size;
1197
1198         ret = inflate(&z, Z_NO_FLUSH);
1199         //inflateEnd(&z);
1200
1201         *out_size -= z.avail_out;
1202         return ret == 1 ? 0 : ret;
1203 }
1204
1205 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1206 {
1207         unsigned long cdbuffer_size, cdbuffer_size_expect;
1208         unsigned int size;
1209         int is_compressed;
1210         off_t start_byte;
1211         int ret, block;
1212
1213         if (base)
1214                 sector += base / 2352;
1215
1216         block = sector >> compr_img->block_shift;
1217         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1218
1219         if (block == compr_img->current_block) {
1220                 //printf("hit sect %d\n", sector);
1221                 goto finish;
1222         }
1223
1224         if (sector >= compr_img->index_len * 16) {
1225                 SysPrintf("sector %d is past img end\n", sector);
1226                 return -1;
1227         }
1228
1229         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1230         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1231                 SysPrintf("seek error for block %d at %llx: ",
1232                         block, (long long)start_byte);
1233                 perror(NULL);
1234                 return -1;
1235         }
1236
1237         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1238         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1239         if (size > sizeof(compr_img->buff_compressed)) {
1240                 SysPrintf("block %d is too large: %u\n", block, size);
1241                 return -1;
1242         }
1243
1244         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1245                                 1, size, cdHandle) != size) {
1246                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1247                 perror(NULL);
1248                 return -1;
1249         }
1250
1251         if (is_compressed) {
1252                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1253                 cdbuffer_size = cdbuffer_size_expect;
1254                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1255                 if (ret != 0) {
1256                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1257                                         ret, block, sector);
1258                         return -1;
1259                 }
1260                 if (cdbuffer_size != cdbuffer_size_expect)
1261                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1262                                         cdbuffer_size_expect, sector);
1263         }
1264
1265         // done at last!
1266         compr_img->current_block = block;
1267
1268 finish:
1269         if (dest != cdbuffer) // copy avoid HACK
1270                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1271                         CD_FRAMESIZE_RAW);
1272         return CD_FRAMESIZE_RAW;
1273 }
1274
1275 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1276 {
1277         int hunk;
1278
1279         if (base)
1280                 sector += base / CD_FRAMESIZE_RAW;
1281
1282         hunk = sector / chd_img->sectors_per_hunk;
1283         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1284
1285         if (hunk == chd_img->current_hunk)
1286                 goto finish;
1287
1288         chd_read(chd_img->chd, hunk, chd_img->buffer);
1289
1290         chd_img->current_hunk = hunk;
1291
1292 finish:
1293         if (dest != cdbuffer) // copy avoid HACK
1294                 memcpy(dest, chd_img->buffer[chd_img->sector_in_hunk],
1295                         CD_FRAMESIZE_RAW);
1296         return CD_FRAMESIZE_RAW;
1297 }
1298
1299 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1300 {
1301         int ret;
1302
1303         fseek(f, base + sector * 2048, SEEK_SET);
1304         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1305
1306         // not really necessary, fake mode 2 header
1307         memset(cdbuffer, 0, 12 * 2);
1308         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1309         cdbuffer[12 + 3] = 1;
1310
1311         return ret;
1312 }
1313
1314 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1315         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1316 }
1317
1318 static unsigned char * CALLBACK ISOgetBuffer_chd(void) {
1319         return chd_img->buffer[chd_img->sector_in_hunk] + 12;
1320 }
1321
1322 static unsigned char * CALLBACK ISOgetBuffer(void) {
1323         return cdbuffer + 12;
1324 }
1325
1326 static void PrintTracks(void) {
1327         int i;
1328
1329         for (i = 1; i <= numtracks; i++) {
1330                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1331                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1332                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1333                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1334         }
1335 }
1336
1337 // This function is invoked by the front-end when opening an ISO
1338 // file for playback
1339 static long CALLBACK ISOopen(void) {
1340         boolean isMode1ISO = FALSE;
1341         char alt_bin_filename[MAXPATHLEN];
1342         const char *bin_filename;
1343
1344         if (cdHandle != NULL) {
1345                 return 0; // it's already open
1346         }
1347
1348         cdHandle = fopen(GetIsoFile(), "rb");
1349         if (cdHandle == NULL) {
1350                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1351                         GetIsoFile(), strerror(errno));
1352                 return -1;
1353         }
1354
1355         SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1356
1357         cddaBigEndian = FALSE;
1358         subChanMixed = FALSE;
1359         subChanRaw = FALSE;
1360         pregapOffset = 0;
1361         cdrIsoMultidiskCount = 1;
1362         multifile = 0;
1363
1364         CDR_getBuffer = ISOgetBuffer;
1365         cdimg_read_func = cdread_normal;
1366
1367         if (parsetoc(GetIsoFile()) == 0) {
1368                 SysPrintf("[+toc]");
1369         }
1370         else if (parseccd(GetIsoFile()) == 0) {
1371                 SysPrintf("[+ccd]");
1372         }
1373         else if (parsemds(GetIsoFile()) == 0) {
1374                 SysPrintf("[+mds]");
1375         }
1376         else if (parsecue(GetIsoFile()) == 0) {
1377                 SysPrintf("[+cue]");
1378         }
1379         if (handlepbp(GetIsoFile()) == 0) {
1380                 SysPrintf("[pbp]");
1381                 CDR_getBuffer = ISOgetBuffer_compr;
1382                 cdimg_read_func = cdread_compressed;
1383         }
1384         else if (handlecbin(GetIsoFile()) == 0) {
1385                 SysPrintf("[cbin]");
1386                 CDR_getBuffer = ISOgetBuffer_compr;
1387                 cdimg_read_func = cdread_compressed;
1388         }
1389         else if (handlechd(GetIsoFile()) == 0) {
1390                 SysPrintf("[chd]");
1391                 CDR_getBuffer = ISOgetBuffer_chd;
1392                 cdimg_read_func = cdread_chd;
1393         }
1394
1395         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1396                 SysPrintf("[+sub]");
1397         }
1398         if (opensbifile(GetIsoFile()) == 0) {
1399                 SysPrintf("[+sbi]");
1400         }
1401
1402         fseeko(cdHandle, 0, SEEK_END);
1403
1404         // maybe user selected metadata file instead of main .bin ..
1405         bin_filename = GetIsoFile();
1406         if (ftello(cdHandle) < 2352 * 0x10) {
1407                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1408                 FILE *tmpf = NULL;
1409                 size_t i;
1410                 char *p;
1411
1412                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1413                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1414                 if (strlen(alt_bin_filename) >= 4) {
1415                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1416                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1417                                 strcpy(p, exts[i]);
1418                                 tmpf = fopen(alt_bin_filename, "rb");
1419                                 if (tmpf != NULL)
1420                                         break;
1421                         }
1422                 }
1423                 if (tmpf != NULL) {
1424                         bin_filename = alt_bin_filename;
1425                         fclose(cdHandle);
1426                         cdHandle = tmpf;
1427                         fseeko(cdHandle, 0, SEEK_END);
1428                 }
1429         }
1430
1431         // guess whether it is mode1/2048
1432         if (ftello(cdHandle) % 2048 == 0) {
1433                 unsigned int modeTest = 0;
1434                 fseek(cdHandle, 0, SEEK_SET);
1435                 fread(&modeTest, 4, 1, cdHandle);
1436                 if (SWAP32(modeTest) != 0xffffff00) {
1437                         SysPrintf("[2048]");
1438                         isMode1ISO = TRUE;
1439                 }
1440         }
1441         fseek(cdHandle, 0, SEEK_SET);
1442
1443         SysPrintf(".\n");
1444
1445         PrintTracks();
1446
1447         if (subChanMixed)
1448                 cdimg_read_func = cdread_sub_mixed;
1449         else if (isMode1ISO)
1450                 cdimg_read_func = cdread_2048;
1451
1452         // make sure we have another handle open for cdda
1453         if (numtracks > 1 && ti[1].handle == NULL) {
1454                 ti[1].handle = fopen(bin_filename, "rb");
1455         }
1456         cdda_cur_sector = 0;
1457         cdda_file_offset = 0;
1458
1459         return 0;
1460 }
1461
1462 static long CALLBACK ISOclose(void) {
1463         int i;
1464
1465         if (cdHandle != NULL) {
1466                 fclose(cdHandle);
1467                 cdHandle = NULL;
1468         }
1469         if (subHandle != NULL) {
1470                 fclose(subHandle);
1471                 subHandle = NULL;
1472         }
1473         stopCDDA();
1474         cddaHandle = NULL;
1475
1476         if (compr_img != NULL) {
1477                 free(compr_img->index_table);
1478                 free(compr_img);
1479                 compr_img = NULL;
1480         }
1481
1482         if (chd_img != NULL) {
1483                 chd_close(chd_img->chd);
1484                 free(chd_img->buffer);
1485                 free(chd_img);
1486                 chd_img = NULL;
1487         }
1488
1489         for (i = 1; i <= numtracks; i++) {
1490                 if (ti[i].handle != NULL) {
1491                         fclose(ti[i].handle);
1492                         ti[i].handle = NULL;
1493                 }
1494         }
1495         numtracks = 0;
1496         ti[1].type = 0;
1497         UnloadSBI();
1498
1499         memset(cdbuffer, 0, sizeof(cdbuffer));
1500         CDR_getBuffer = ISOgetBuffer;
1501
1502         return 0;
1503 }
1504
1505 static long CALLBACK ISOinit(void) {
1506         assert(cdHandle == NULL);
1507         assert(subHandle == NULL);
1508
1509         return 0; // do nothing
1510 }
1511
1512 static long CALLBACK ISOshutdown(void) {
1513         ISOclose();
1514         return 0;
1515 }
1516
1517 // return Starting and Ending Track
1518 // buffer:
1519 //  byte 0 - start track
1520 //  byte 1 - end track
1521 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1522         buffer[0] = 1;
1523
1524         if (numtracks > 0) {
1525                 buffer[1] = numtracks;
1526         }
1527         else {
1528                 buffer[1] = 1;
1529         }
1530
1531         return 0;
1532 }
1533
1534 // return Track Time
1535 // buffer:
1536 //  byte 0 - frame
1537 //  byte 1 - second
1538 //  byte 2 - minute
1539 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1540         if (track == 0) {
1541                 unsigned int sect;
1542                 unsigned char time[3];
1543                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1544                 sec2msf(sect, (char *)time);
1545                 buffer[2] = time[0];
1546                 buffer[1] = time[1];
1547                 buffer[0] = time[2];
1548         }
1549         else if (numtracks > 0 && track <= numtracks) {
1550                 buffer[2] = ti[track].start[0];
1551                 buffer[1] = ti[track].start[1];
1552                 buffer[0] = ti[track].start[2];
1553         }
1554         else {
1555                 buffer[2] = 0;
1556                 buffer[1] = 2;
1557                 buffer[0] = 0;
1558         }
1559
1560         return 0;
1561 }
1562
1563 // decode 'raw' subchannel data ripped by cdrdao
1564 static void DecodeRawSubData(void) {
1565         unsigned char subQData[12];
1566         int i;
1567
1568         memset(subQData, 0, sizeof(subQData));
1569
1570         for (i = 0; i < 8 * 12; i++) {
1571                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1572                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1573                 }
1574         }
1575
1576         memcpy(&subbuffer[12], subQData, 12);
1577 }
1578
1579 // read track
1580 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1581 // uses bcd format
1582 static long CALLBACK ISOreadTrack(unsigned char *time) {
1583         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1584         long ret;
1585
1586         if (cdHandle == NULL) {
1587                 return -1;
1588         }
1589
1590         if (pregapOffset) {
1591                 subChanMissing = FALSE;
1592                 if (sector >= pregapOffset) {
1593                         sector -= 2 * 75;
1594                         if (sector < pregapOffset)
1595                                 subChanMissing = TRUE;
1596                 }
1597         }
1598
1599         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1600         if (ret < 0)
1601                 return -1;
1602
1603         if (subHandle != NULL) {
1604                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1605                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1606
1607                 if (subChanRaw) DecodeRawSubData();
1608         }
1609
1610         return 0;
1611 }
1612
1613 // plays cdda audio
1614 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1615 // does NOT uses bcd format
1616 static long CALLBACK ISOplay(unsigned char *time) {
1617         unsigned int i;
1618
1619         if (numtracks <= 1)
1620                 return 0;
1621
1622         // find the track
1623         cdda_cur_sector = msf2sec((char *)time);
1624         for (i = numtracks; i > 1; i--) {
1625                 cdda_first_sector = msf2sec(ti[i].start);
1626                 if (cdda_first_sector <= cdda_cur_sector + 2 * 75)
1627                         break;
1628         }
1629         cdda_file_offset = ti[i].start_offset;
1630
1631         // find the file that contains this track
1632         for (; i > 1; i--)
1633                 if (ti[i].handle != NULL)
1634                         break;
1635
1636         cddaHandle = ti[i].handle;
1637
1638         if (SPU_playCDDAchannel != NULL)
1639                 startCDDA();
1640
1641         return 0;
1642 }
1643
1644 // stops cdda audio
1645 static long CALLBACK ISOstop(void) {
1646         stopCDDA();
1647         return 0;
1648 }
1649
1650 // gets subchannel data
1651 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1652         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1653                 return subbuffer;
1654         }
1655
1656         return NULL;
1657 }
1658
1659 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1660         u32 sect;
1661
1662         CDR__getStatus(stat);
1663
1664         if (playing) {
1665                 stat->Type = 0x02;
1666                 stat->Status |= 0x80;
1667         }
1668         else {
1669                 // BIOS - boot ID (CD type)
1670                 stat->Type = ti[1].type;
1671         }
1672
1673         // relative -> absolute time
1674         sect = cddaCurPos;
1675         sec2msf(sect, (char *)stat->Time);
1676
1677         return 0;
1678 }
1679
1680 // read CDDA sector into buffer
1681 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1682         unsigned char msf[3] = {m, s, f};
1683         unsigned int file, track, track_start = 0;
1684         int ret;
1685
1686         cddaCurPos = msf2sec((char *)msf);
1687
1688         // find current track index
1689         for (track = numtracks; ; track--) {
1690                 track_start = msf2sec(ti[track].start);
1691                 if (track_start <= cddaCurPos)
1692                         break;
1693                 if (track == 1)
1694                         break;
1695         }
1696
1697         // data tracks play silent
1698         if (ti[track].type != CDDA) {
1699                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1700                 return 0;
1701         }
1702
1703         file = 1;
1704         if (multifile) {
1705                 // find the file that contains this track
1706                 for (file = track; file > 1; file--)
1707                         if (ti[file].handle != NULL)
1708                                 break;
1709         }
1710
1711         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1712                 buffer, cddaCurPos - track_start);
1713         if (ret != CD_FRAMESIZE_RAW) {
1714                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1715                 return -1;
1716         }
1717
1718         if (cddaBigEndian) {
1719                 int i;
1720                 unsigned char tmp;
1721
1722                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1723                         tmp = buffer[i * 2];
1724                         buffer[i * 2] = buffer[i * 2 + 1];
1725                         buffer[i * 2 + 1] = tmp;
1726                 }
1727         }
1728
1729         return 0;
1730 }
1731
1732 void cdrIsoInit(void) {
1733         CDR_init = ISOinit;
1734         CDR_shutdown = ISOshutdown;
1735         CDR_open = ISOopen;
1736         CDR_close = ISOclose;
1737         CDR_getTN = ISOgetTN;
1738         CDR_getTD = ISOgetTD;
1739         CDR_readTrack = ISOreadTrack;
1740         CDR_getBuffer = ISOgetBuffer;
1741         CDR_play = ISOplay;
1742         CDR_stop = ISOstop;
1743         CDR_getBufferSub = ISOgetBufferSub;
1744         CDR_getStatus = ISOgetStatus;
1745         CDR_readCDDA = ISOreadCDDA;
1746
1747         CDR_getDriveLetter = CDR__getDriveLetter;
1748         CDR_configure = CDR__configure;
1749         CDR_test = CDR__test;
1750         CDR_about = CDR__about;
1751         CDR_setfilename = CDR__setfilename;
1752
1753         numtracks = 0;
1754 }
1755
1756 int cdrIsoActive(void) {
1757         return (cdHandle != NULL);
1758 }