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 #ifdef _WIN32
  69 static HANDLE threadid;
  70 #else
  71 static pthread_t threadid;
  72 #endif
  73 static unsigned int initial_offset = 0;
  74 static boolean playing = FALSE;
  75 static boolean cddaBigEndian = FALSE;
  76 // cdda sectors in toc, byte offset in file
  77 static unsigned int cdda_cur_sector;
  78 static unsigned int cdda_first_sector;
  79 static unsigned int cdda_file_offset;
  80 /* Frame offset into CD image where pregap data would be found if it was there.
  81  * If a game seeks there we must *not* return subchannel data since it's
  82  * not in the CD image, so that cdrom code can fake subchannel data instead.
  83  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  84 static unsigned int pregapOffset;
  85
  86 #define cddaCurPos cdda_cur_sector
  87
  88 // compressed image stuff
  89 static struct {
  90         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  91         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  92         off_t *index_table;
  93         unsigned int index_len;
  94         unsigned int block_shift;
  95         unsigned int current_block;
  96         unsigned int sector_in_blk;
  97 } *compr_img;
  98
  99 #ifdef HAVE_CHD
 100 typedef struct {
 101         unsigned char (*buffer)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE];
 102         chd_file* chd;
 103         const chd_header* header;
 104         unsigned int sectors_per_hunk;
 105         unsigned int current_hunk;
 106         unsigned int sector_in_hunk;
 107 } CHD_IMG;
 108
 109 static CHD_IMG *chd_img;
 110 #endif
 111
 112 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
 113
 114 char* CALLBACK CDR__getDriveLetter(void);
 115 long CALLBACK CDR__configure(void);
 116 long CALLBACK CDR__test(void);
 117 void CALLBACK CDR__about(void);
 118 long CALLBACK CDR__setfilename(char *filename);
 119 long CALLBACK CDR__getStatus(struct CdrStat *stat);
 120
 121 static void DecodeRawSubData(void);
 122
 123 struct trackinfo {
 124         enum {DATA=1, CDDA} type;
 125         char start[3];          // MSF-format
 126         char length[3];         // MSF-format
 127         FILE *handle;           // for multi-track images CDDA
 128         unsigned int start_offset; // byte offset from start of above file
 129 };
 130
 131 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 132
 133 static int numtracks = 0;
 134 static struct trackinfo ti[MAXTRACKS];
 135
 136 // get a sector from a msf-array
 137 static unsigned int msf2sec(char *msf) {
 138         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 139 }
 140
 141 static void sec2msf(unsigned int s, char *msf) {
 142         msf[0] = s / 75 / 60;
 143         s = s - msf[0] * 75 * 60;
 144         msf[1] = s / 75;
 145         s = s - msf[1] * 75;
 146         msf[2] = s;
 147 }
 148
 149 // divide a string of xx:yy:zz into m, s, f
 150 static void tok2msf(char *time, char *msf) {
 151         char *token;
 152
 153         token = strtok(time, ":");
 154         if (token) {
 155                 msf[0] = atoi(token);
 156         }
 157         else {
 158                 msf[0] = 0;
 159         }
 160
 161         token = strtok(NULL, ":");
 162         if (token) {
 163                 msf[1] = atoi(token);
 164         }
 165         else {
 166                 msf[1] = 0;
 167         }
 168
 169         token = strtok(NULL, ":");
 170         if (token) {
 171                 msf[2] = atoi(token);
 172         }
 173         else {
 174                 msf[2] = 0;
 175         }
 176 }
 177
 178 #ifndef _WIN32
 179 static long GetTickCount(void) {
 180         static time_t           initial_time = 0;
 181         struct timeval          now;
 182
 183         gettimeofday(&now, NULL);
 184
 185         if (initial_time == 0) {
 186                 initial_time = now.tv_sec;
 187         }
 188
 189         return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
 190 }
 191 #endif
 192
 193 // this thread plays audio data
 194 #ifdef _WIN32
 195 static void playthread(void *param)
 196 #else
 197 static void *playthread(void *param)
 198 #endif
 199 {
 200         long osleep, d, t, i, s;
 201         unsigned char   tmp;
 202         int ret = 0, sector_offs;
 203
 204         t = GetTickCount();
 205
 206         while (playing) {
 207                 s = 0;
 208                 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
 209                         sector_offs = cdda_cur_sector - cdda_first_sector;
 210                         if (sector_offs < 0) {
 211                                 d = CD_FRAMESIZE_RAW;
 212                                 memset(sndbuffer + s, 0, d);
 213                         }
 214                         else {
 215                                 d = cdimg_read_func(cddaHandle, cdda_file_offset,
 216                                         sndbuffer + s, sector_offs);
 217                                 if (d < CD_FRAMESIZE_RAW)
 218                                         break;
 219                         }
 220
 221                         s += d;
 222                         cdda_cur_sector++;
 223                 }
 224
 225                 if (s == 0) {
 226                         playing = FALSE;
 227                         initial_offset = 0;
 228                         break;
 229                 }
 230
 231                 if (!cdr.Muted && playing) {
 232                         if (cddaBigEndian) {
 233                                 for (i = 0; i < s / 2; i++) {
 234                                         tmp = sndbuffer[i * 2];
 235                                         sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
 236                                         sndbuffer[i * 2 + 1] = tmp;
 237                                 }
 238                         }
 239
 240                         // can't do it yet due to readahead..
 241                         //cdrAttenuate((short *)sndbuffer, s / 4, 1);
 242                         do {
 243                                 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
 244                                 if (ret == 0x7761)
 245                                         usleep(6 * 1000);
 246                         } while (ret == 0x7761 && playing); // rearmed_wait
 247                 }
 248
 249                 if (ret != 0x676f) { // !rearmed_go
 250                         // do approx sleep
 251                         long now;
 252
 253                         // HACK: stop feeding data while emu is paused
 254                         extern int stop;
 255                         while (stop && playing)
 256                                 usleep(10000);
 257
 258                         now = GetTickCount();
 259                         osleep = t - now;
 260                         if (osleep <= 0) {
 261                                 osleep = 1;
 262                                 t = now;
 263                         }
 264                         else if (osleep > CDDA_FRAMETIME) {
 265                                 osleep = CDDA_FRAMETIME;
 266                                 t = now;
 267                         }
 268
 269                         usleep(osleep * 1000);
 270                         t += CDDA_FRAMETIME;
 271                 }
 272
 273         }
 274
 275 #ifdef _WIN32
 276         _endthread();
 277 #else
 278         pthread_exit(0);
 279         return NULL;
 280 #endif
 281 }
 282
 283 // stop the CDDA playback
 284 static void stopCDDA() {
 285         if (!playing) {
 286                 return;
 287         }
 288
 289         playing = FALSE;
 290 #ifdef _WIN32
 291         WaitForSingleObject(threadid, INFINITE);
 292 #else
 293         pthread_join(threadid, NULL);
 294 #endif
 295 }
 296
 297 // start the CDDA playback
 298 static void startCDDA(void) {
 299         if (playing) {
 300                 stopCDDA();
 301         }
 302
 303         playing = TRUE;
 304
 305 #ifdef _WIN32
 306         threadid = (HANDLE)_beginthread(playthread, 0, NULL);
 307 #else
 308         pthread_create(&threadid, NULL, playthread, NULL);
 309 #endif
 310 }
 311
 312 // this function tries to get the .toc file of the given .bin
 313 // the necessary data is put into the ti (trackinformation)-array
 314 static int parsetoc(const char *isofile) {
 315         char                    tocname[MAXPATHLEN];
 316         FILE                    *fi;
 317         char                    linebuf[256], tmp[256], name[256];
 318         char                    *token;
 319         char                    time[20], time2[20];
 320         unsigned int    t, sector_offs, sector_size;
 321         unsigned int    current_zero_gap = 0;
 322
 323         numtracks = 0;
 324
 325         // copy name of the iso and change extension from .bin to .toc
 326         strncpy(tocname, isofile, sizeof(tocname));
 327         tocname[MAXPATHLEN - 1] = '\0';
 328         if (strlen(tocname) >= 4) {
 329                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 330         }
 331         else {
 332                 return -1;
 333         }
 334
 335         if ((fi = fopen(tocname, "r")) == NULL) {
 336                 // try changing extension to .cue (to satisfy some stupid tutorials)
 337                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 338                 if ((fi = fopen(tocname, "r")) == NULL) {
 339                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 340                         strcpy(tocname, isofile);
 341                         t = strlen(tocname);
 342                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 343                                 tocname[t - 4] = '\0';
 344                                 if ((fi = fopen(tocname, "r")) == NULL) {
 345                                         return -1;
 346                                 }
 347                         }
 348                         else {
 349                                 return -1;
 350                         }
 351                 }
 352                 // check if it's really a TOC named as a .cue
 353                 fgets(linebuf, sizeof(linebuf), fi);
 354                 token = strtok(linebuf, " ");
 355                 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 356                         fclose(fi);
 357                         return -1;
 358                 }
 359                 fseek(fi, 0, SEEK_SET);
 360         }
 361
 362         memset(&ti, 0, sizeof(ti));
 363         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 364
 365         sector_size = CD_FRAMESIZE_RAW;
 366         sector_offs = 2 * 75;
 367
 368         // parse the .toc file
 369         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 370                 // search for tracks
 371                 strncpy(tmp, linebuf, sizeof(linebuf));
 372                 token = strtok(tmp, " ");
 373
 374                 if (token == NULL) continue;
 375
 376                 if (!strcmp(token, "TRACK")) {
 377                         sector_offs += current_zero_gap;
 378                         current_zero_gap = 0;
 379
 380                         // get type of track
 381                         token = strtok(NULL, " ");
 382                         numtracks++;
 383
 384                         if (!strncmp(token, "MODE2_RAW", 9)) {
 385                                 ti[numtracks].type = DATA;
 386                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 387
 388                                 // check if this image contains mixed subchannel data
 389                                 token = strtok(NULL, " ");
 390                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 391                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 392                                         subChanMixed = TRUE;
 393                                         if (!strncmp(token, "RW_RAW", 6))
 394                                                 subChanRaw = TRUE;
 395                                 }
 396                         }
 397                         else if (!strncmp(token, "AUDIO", 5)) {
 398                                 ti[numtracks].type = CDDA;
 399                         }
 400                 }
 401                 else if (!strcmp(token, "DATAFILE")) {
 402                         if (ti[numtracks].type == CDDA) {
 403                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 404                                 ti[numtracks].start_offset = t;
 405                                 t = t / sector_size + sector_offs;
 406                                 sec2msf(t, (char *)&ti[numtracks].start);
 407                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 408                         }
 409                         else {
 410                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 411                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 412                         }
 413                 }
 414                 else if (!strcmp(token, "FILE")) {
 415                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 416                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 417                         t += msf2sec(ti[numtracks].start) * sector_size;
 418                         ti[numtracks].start_offset = t;
 419                         t = t / sector_size + sector_offs;
 420                         sec2msf(t, (char *)&ti[numtracks].start);
 421                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 422                 }
 423                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 424                         // skip unneeded optional fields
 425                         while (token != NULL) {
 426                                 token = strtok(NULL, " ");
 427                                 if (strchr(token, ':') != NULL)
 428                                         break;
 429                         }
 430                         if (token != NULL) {
 431                                 tok2msf(token, tmp);
 432                                 current_zero_gap = msf2sec(tmp);
 433                         }
 434                         if (numtracks > 1) {
 435                                 t = ti[numtracks - 1].start_offset;
 436                                 t /= sector_size;
 437                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 438                         }
 439                 }
 440                 else if (!strcmp(token, "START")) {
 441                         token = strtok(NULL, " ");
 442                         if (token != NULL && strchr(token, ':')) {
 443                                 tok2msf(token, tmp);
 444                                 t = msf2sec(tmp);
 445                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 446                                 t = msf2sec(ti[numtracks].start) + t;
 447                                 sec2msf(t, (char *)&ti[numtracks].start);
 448                         }
 449                 }
 450         }
 451
 452         fclose(fi);
 453
 454         return 0;
 455 }
 456
 457 // this function tries to get the .cue file of the given .bin
 458 // the necessary data is put into the ti (trackinformation)-array
 459 static int parsecue(const char *isofile) {
 460         char                    cuename[MAXPATHLEN];
 461         char                    filepath[MAXPATHLEN];
 462         char                    *incue_fname;
 463         FILE                    *fi;
 464         char                    *token;
 465         char                    time[20];
 466         char                    *tmp;
 467         char                    linebuf[256], tmpb[256], dummy[256];
 468         unsigned int    incue_max_len;
 469         unsigned int    t, file_len, mode, sector_offs;
 470         unsigned int    sector_size = 2352;
 471
 472         numtracks = 0;
 473
 474         // copy name of the iso and change extension from .bin to .cue
 475         strncpy(cuename, isofile, sizeof(cuename));
 476         cuename[MAXPATHLEN - 1] = '\0';
 477         if (strlen(cuename) >= 4) {
 478                 strcpy(cuename + strlen(cuename) - 4, ".cue");
 479         }
 480         else {
 481                 return -1;
 482         }
 483
 484         if ((fi = fopen(cuename, "r")) == NULL) {
 485                 return -1;
 486         }
 487
 488         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 489         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 490         // that...
 491         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 492                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 493                         // Don't proceed further, as this is actually a .toc file rather
 494                         // than a .cue file.
 495                         fclose(fi);
 496                         return parsetoc(isofile);
 497                 }
 498                 fseek(fi, 0, SEEK_SET);
 499         }
 500
 501         // build a path for files referenced in .cue
 502         strncpy(filepath, cuename, sizeof(filepath));
 503         tmp = strrchr(filepath, '/');
 504         if (tmp == NULL)
 505                 tmp = strrchr(filepath, '\\');
 506         if (tmp != NULL)
 507                 tmp++;
 508         else
 509                 tmp = filepath;
 510         *tmp = 0;
 511         filepath[sizeof(filepath) - 1] = 0;
 512         incue_fname = tmp;
 513         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 514
 515         memset(&ti, 0, sizeof(ti));
 516
 517         file_len = 0;
 518         sector_offs = 2 * 75;
 519
 520         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 521                 strncpy(dummy, linebuf, sizeof(linebuf));
 522                 token = strtok(dummy, " ");
 523
 524                 if (token == NULL) {
 525                         continue;
 526                 }
 527
 528                 if (!strcmp(token, "TRACK")) {
 529                         numtracks++;
 530
 531                         sector_size = 0;
 532                         if (strstr(linebuf, "AUDIO") != NULL) {
 533                                 ti[numtracks].type = CDDA;
 534                                 sector_size = 2352;
 535                         }
 536                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 537                                 ti[numtracks].type = DATA;
 538                         else {
 539                                 SysPrintf(".cue: failed to parse TRACK\n");
 540                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 541                         }
 542                         if (sector_size == 0)
 543                                 sector_size = 2352;
 544                 }
 545                 else if (!strcmp(token, "INDEX")) {
 546                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 547                                 SysPrintf(".cue: failed to parse INDEX\n");
 548                         tok2msf(time, (char *)&ti[numtracks].start);
 549
 550                         t = msf2sec(ti[numtracks].start);
 551                         ti[numtracks].start_offset = t * sector_size;
 552                         t += sector_offs;
 553                         sec2msf(t, ti[numtracks].start);
 554
 555                         // default track length to file length
 556                         t = file_len - ti[numtracks].start_offset / sector_size;
 557                         sec2msf(t, ti[numtracks].length);
 558
 559                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 560                                 // this track uses the same file as the last,
 561                                 // start of this track is last track's end
 562                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 563                                 sec2msf(t, ti[numtracks - 1].length);
 564                         }
 565                         if (numtracks > 1 && pregapOffset == -1)
 566                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 567                 }
 568                 else if (!strcmp(token, "PREGAP")) {
 569                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 570                                 tok2msf(time, dummy);
 571                                 sector_offs += msf2sec(dummy);
 572                         }
 573                         pregapOffset = -1; // mark to fill track start_offset
 574                 }
 575                 else if (!strcmp(token, "FILE")) {
 576                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 577                         if (t != 1)
 578                                 sscanf(linebuf, " FILE %255s", tmpb);
 579
 580                         // absolute path?
 581                         ti[numtracks + 1].handle = fopen(tmpb, "rb");
 582                         if (ti[numtracks + 1].handle == NULL) {
 583                                 // relative to .cue?
 584                                 tmp = strrchr(tmpb, '\\');
 585                                 if (tmp == NULL)
 586                                         tmp = strrchr(tmpb, '/');
 587                                 if (tmp != NULL)
 588                                         tmp++;
 589                                 else
 590                                         tmp = tmpb;
 591                                 strncpy(incue_fname, tmp, incue_max_len);
 592                                 ti[numtracks + 1].handle = fopen(filepath, "rb");
 593                         }
 594
 595                         // update global offset if this is not first file in this .cue
 596                         if (numtracks + 1 > 1) {
 597                                 multifile = 1;
 598                                 sector_offs += file_len;
 599                         }
 600
 601                         file_len = 0;
 602                         if (ti[numtracks + 1].handle == NULL) {
 603                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 604                                 continue;
 605                         }
 606                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 607                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 608
 609                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 610                                 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
 611                         {
 612                                 // user selected .cue as image file, use it's data track instead
 613                                 fclose(cdHandle);
 614                                 cdHandle = fopen(filepath, "rb");
 615                         }
 616                 }
 617         }
 618
 619         fclose(fi);
 620
 621         return 0;
 622 }
 623
 624 // this function tries to get the .ccd file of the given .img
 625 // the necessary data is put into the ti (trackinformation)-array
 626 static int parseccd(const char *isofile) {
 627         char                    ccdname[MAXPATHLEN];
 628         FILE                    *fi;
 629         char                    linebuf[256];
 630         unsigned int    t;
 631
 632         numtracks = 0;
 633
 634         // copy name of the iso and change extension from .img to .ccd
 635         strncpy(ccdname, isofile, sizeof(ccdname));
 636         ccdname[MAXPATHLEN - 1] = '\0';
 637         if (strlen(ccdname) >= 4) {
 638                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 639         }
 640         else {
 641                 return -1;
 642         }
 643
 644         if ((fi = fopen(ccdname, "r")) == NULL) {
 645                 return -1;
 646         }
 647
 648         memset(&ti, 0, sizeof(ti));
 649
 650         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 651                 if (!strncmp(linebuf, "[TRACK", 6)){
 652                         numtracks++;
 653                 }
 654                 else if (!strncmp(linebuf, "MODE=", 5)) {
 655                         sscanf(linebuf, "MODE=%d", &t);
 656                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 657                 }
 658                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 659                         sscanf(linebuf, "INDEX 1=%d", &t);
 660                         sec2msf(t + 2 * 75, ti[numtracks].start);
 661                         ti[numtracks].start_offset = t * 2352;
 662
 663                         // If we've already seen another track, this is its end
 664                         if (numtracks > 1) {
 665                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 666                                 sec2msf(t, ti[numtracks - 1].length);
 667                         }
 668                 }
 669         }
 670
 671         fclose(fi);
 672
 673         // Fill out the last track's end based on size
 674         if (numtracks >= 1) {
 675                 fseek(cdHandle, 0, SEEK_END);
 676                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 677                 sec2msf(t, ti[numtracks].length);
 678         }
 679
 680         return 0;
 681 }
 682
 683 // this function tries to get the .mds file of the given .mdf
 684 // the necessary data is put into the ti (trackinformation)-array
 685 static int parsemds(const char *isofile) {
 686         char                    mdsname[MAXPATHLEN];
 687         FILE                    *fi;
 688         unsigned int    offset, extra_offset, l, i;
 689         unsigned short  s;
 690
 691         numtracks = 0;
 692
 693         // copy name of the iso and change extension from .mdf to .mds
 694         strncpy(mdsname, isofile, sizeof(mdsname));
 695         mdsname[MAXPATHLEN - 1] = '\0';
 696         if (strlen(mdsname) >= 4) {
 697                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 698         }
 699         else {
 700                 return -1;
 701         }
 702
 703         if ((fi = fopen(mdsname, "rb")) == NULL) {
 704                 return -1;
 705         }
 706
 707         memset(&ti, 0, sizeof(ti));
 708
 709         // check if it's a valid mds file
 710         fread(&i, 1, sizeof(unsigned int), fi);
 711         i = SWAP32(i);
 712         if (i != 0x4944454D) {
 713                 // not an valid mds file
 714                 fclose(fi);
 715                 return -1;
 716         }
 717
 718         // get offset to session block
 719         fseek(fi, 0x50, SEEK_SET);
 720         fread(&offset, 1, sizeof(unsigned int), fi);
 721         offset = SWAP32(offset);
 722
 723         // get total number of tracks
 724         offset += 14;
 725         fseek(fi, offset, SEEK_SET);
 726         fread(&s, 1, sizeof(unsigned short), fi);
 727         s = SWAP16(s);
 728         numtracks = s;
 729
 730         // get offset to track blocks
 731         fseek(fi, 4, SEEK_CUR);
 732         fread(&offset, 1, sizeof(unsigned int), fi);
 733         offset = SWAP32(offset);
 734
 735         // skip lead-in data
 736         while (1) {
 737                 fseek(fi, offset + 4, SEEK_SET);
 738                 if (fgetc(fi) < 0xA0) {
 739                         break;
 740                 }
 741                 offset += 0x50;
 742         }
 743
 744         // check if the image contains mixed subchannel data
 745         fseek(fi, offset + 1, SEEK_SET);
 746         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 747
 748         // read track data
 749         for (i = 1; i <= numtracks; i++) {
 750                 fseek(fi, offset, SEEK_SET);
 751
 752                 // get the track type
 753                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 754                 fseek(fi, 8, SEEK_CUR);
 755
 756                 // get the track starting point
 757                 ti[i].start[0] = fgetc(fi);
 758                 ti[i].start[1] = fgetc(fi);
 759                 ti[i].start[2] = fgetc(fi);
 760
 761                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 762                 extra_offset = SWAP32(extra_offset);
 763
 764                 // get track start offset (in .mdf)
 765                 fseek(fi, offset + 0x28, SEEK_SET);
 766                 fread(&l, 1, sizeof(unsigned int), fi);
 767                 l = SWAP32(l);
 768                 ti[i].start_offset = l;
 769
 770                 // get pregap
 771                 fseek(fi, extra_offset, SEEK_SET);
 772                 fread(&l, 1, sizeof(unsigned int), fi);
 773                 l = SWAP32(l);
 774                 if (l != 0 && i > 1)
 775                         pregapOffset = msf2sec(ti[i].start);
 776
 777                 // get the track length
 778                 fread(&l, 1, sizeof(unsigned int), fi);
 779                 l = SWAP32(l);
 780                 sec2msf(l, ti[i].length);
 781
 782                 offset += 0x50;
 783         }
 784
 785         fclose(fi);
 786         return 0;
 787 }
 788
 789 static int handlepbp(const char *isofile) {
 790         struct {
 791                 unsigned int sig;
 792                 unsigned int dontcare[8];
 793                 unsigned int psar_offs;
 794         } pbp_hdr;
 795         struct {
 796                 unsigned char type;
 797                 unsigned char pad0;
 798                 unsigned char track;
 799                 char index0[3];
 800                 char pad1;
 801                 char index1[3];
 802         } toc_entry;
 803         struct {
 804                 unsigned int offset;
 805                 unsigned int size;
 806                 unsigned int dontcare[6];
 807         } index_entry;
 808         char psar_sig[11];
 809         off_t psisoimg_offs, cdimg_base;
 810         unsigned int t, cd_length;
 811         unsigned int offsettab[8];
 812         const char *ext = NULL;
 813         int i, ret;
 814
 815         if (strlen(isofile) >= 4)
 816                 ext = isofile + strlen(isofile) - 4;
 817         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 818                 return -1;
 819
 820         fseeko(cdHandle, 0, SEEK_SET);
 821
 822         numtracks = 0;
 823
 824         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 825         if (ret != sizeof(pbp_hdr)) {
 826                 SysPrintf("failed to read pbp\n");
 827                 goto fail_io;
 828         }
 829
 830         ret = fseeko(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 831         if (ret != 0) {
 832                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 833                 goto fail_io;
 834         }
 835
 836         psisoimg_offs = pbp_hdr.psar_offs;
 837         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 838         psar_sig[10] = 0;
 839         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 840                 // multidisk image?
 841                 ret = fseeko(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 842                 if (ret != 0) {
 843                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 844                         goto fail_io;
 845                 }
 846
 847                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 848                         SysPrintf("failed to read offsettab\n");
 849                         goto fail_io;
 850                 }
 851
 852                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 853                         if (offsettab[i] == 0)
 854                                 break;
 855                 }
 856                 cdrIsoMultidiskCount = i;
 857                 if (cdrIsoMultidiskCount == 0) {
 858                         SysPrintf("multidisk eboot has 0 images?\n");
 859                         goto fail_io;
 860                 }
 861
 862                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 863                         cdrIsoMultidiskSelect = 0;
 864
 865                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 866
 867                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 868                 if (ret != 0) {
 869                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 870                         goto fail_io;
 871                 }
 872
 873                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 874                 psar_sig[10] = 0;
 875         }
 876
 877         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 878                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 879                 goto fail_io;
 880         }
 881
 882         // seek to TOC
 883         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 884         if (ret != 0) {
 885                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 886                 goto fail_io;
 887         }
 888
 889         // first 3 entries are special
 890         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 891         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 892         numtracks = btoi(toc_entry.index1[0]);
 893
 894         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 895         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 896                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 897
 898         for (i = 1; i <= numtracks; i++) {
 899                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 900
 901                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 902
 903                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 904                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 905                 ti[i].start_offset *= 2352;
 906                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 907                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 908                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 909
 910                 if (i > 1) {
 911                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 912                         sec2msf(t, ti[i - 1].length);
 913                 }
 914         }
 915         t = cd_length - ti[numtracks].start_offset / 2352;
 916         sec2msf(t, ti[numtracks].length);
 917
 918         // seek to ISO index
 919         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 920         if (ret != 0) {
 921                 SysPrintf("failed to seek to ISO index\n");
 922                 goto fail_io;
 923         }
 924
 925         compr_img = calloc(1, sizeof(*compr_img));
 926         if (compr_img == NULL)
 927                 goto fail_io;
 928
 929         compr_img->block_shift = 4;
 930         compr_img->current_block = (unsigned int)-1;
 931
 932         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 933         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 934         if (compr_img->index_table == NULL)
 935                 goto fail_io;
 936
 937         cdimg_base = psisoimg_offs + 0x100000;
 938         for (i = 0; i < compr_img->index_len; i++) {
 939                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 940                 if (ret != sizeof(index_entry)) {
 941                         SysPrintf("failed to read index_entry #%d\n", i);
 942                         goto fail_index;
 943                 }
 944
 945                 if (index_entry.size == 0)
 946                         break;
 947
 948                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 949         }
 950         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 951
 952         return 0;
 953
 954 fail_index:
 955         free(compr_img->index_table);
 956         compr_img->index_table = NULL;
 957 fail_io:
 958         if (compr_img != NULL) {
 959                 free(compr_img);
 960                 compr_img = NULL;
 961         }
 962         return -1;
 963 }
 964
 965 static int handlecbin(const char *isofile) {
 966         struct
 967         {
 968                 char magic[4];
 969                 unsigned int header_size;
 970                 unsigned long long total_bytes;
 971                 unsigned int block_size;
 972                 unsigned char ver;              // 1
 973                 unsigned char align;
 974                 unsigned char rsv_06[2];
 975         } ciso_hdr;
 976         const char *ext = NULL;
 977         unsigned int *index_table = NULL;
 978         unsigned int index = 0, plain;
 979         int i, ret;
 980
 981         if (strlen(isofile) >= 5)
 982                 ext = isofile + strlen(isofile) - 5;
 983         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 984                 return -1;
 985
 986         fseek(cdHandle, 0, SEEK_SET);
 987
 988         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 989         if (ret != sizeof(ciso_hdr)) {
 990                 SysPrintf("failed to read ciso header\n");
 991                 return -1;
 992         }
 993
 994         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 995                 SysPrintf("bad ciso header\n");
 996                 return -1;
 997         }
 998         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 999                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
1000                 if (ret != 0) {
1001                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
1002                         return -1;
1003                 }
1004         }
1005
1006         compr_img = calloc(1, sizeof(*compr_img));
1007         if (compr_img == NULL)
1008                 goto fail_io;
1009
1010         compr_img->block_shift = 0;
1011         compr_img->current_block = (unsigned int)-1;
1012
1013         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
1014         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
1015         if (index_table == NULL)
1016                 goto fail_io;
1017
1018         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
1019         if (ret != compr_img->index_len) {
1020                 SysPrintf("failed to read index table\n");
1021                 goto fail_index;
1022         }
1023
1024         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
1025         if (compr_img->index_table == NULL)
1026                 goto fail_index;
1027
1028         for (i = 0; i < compr_img->index_len + 1; i++) {
1029                 index = index_table[i];
1030                 plain = index & 0x80000000;
1031                 index &= 0x7fffffff;
1032                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
1033                 if (plain)
1034                         compr_img->index_table[i] |= OFF_T_MSB;
1035         }
1036
1037         return 0;
1038
1039 fail_index:
1040         free(index_table);
1041 fail_io:
1042         if (compr_img != NULL) {
1043                 free(compr_img);
1044                 compr_img = NULL;
1045         }
1046         return -1;
1047 }
1048
1049 #ifdef HAVE_CHD
1050 static int handlechd(const char *isofile) {
1051         int frame_offset = 0;
1052         int file_offset = 0;
1053
1054         chd_img = (CHD_IMG *)calloc(1, sizeof(*chd_img));
1055         if (chd_img == NULL)
1056                 goto fail_io;
1057
1058         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
1059                 goto fail_io;
1060
1061         chd_img->header = chd_get_header(chd_img->chd);
1062
1063         chd_img->buffer = (unsigned char (*)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE])malloc(chd_img->header->hunkbytes);
1064         if (chd_img->buffer == NULL)
1065                 goto fail_io;
1066
1067         chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
1068         chd_img->current_hunk = (unsigned int)-1;
1069
1070         cddaBigEndian = TRUE;
1071
1072         numtracks = 0;
1073         memset(ti, 0, sizeof(ti));
1074
1075         while (1)
1076         {
1077                 struct {
1078                         char type[64];
1079                         char subtype[32];
1080                         char pgtype[32];
1081                         char pgsub[32];
1082                         uint32_t track;
1083                         uint32_t frames;
1084                         uint32_t pregap;
1085                         uint32_t postgap;
1086                 } md = {};
1087                 char meta[256];
1088                 uint32_t meta_size = 0;
1089
1090                 if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
1091                         sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
1092                 else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
1093                         sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
1094                 else
1095                         break;
1096
1097                 if(md.track == 1)
1098                         md.pregap = 150;
1099                 else
1100                         sec2msf(msf2sec(ti[md.track-1].length) + md.pregap, ti[md.track-1].length);
1101
1102                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
1103
1104                 sec2msf(frame_offset + md.pregap, ti[md.track].start);
1105                 sec2msf(md.frames, ti[md.track].length);
1106
1107                 ti[md.track].start_offset = file_offset;
1108
1109                 frame_offset += md.pregap + md.frames + md.postgap;
1110                 file_offset += md.frames + md.postgap;
1111                 numtracks++;
1112         }
1113
1114         if (numtracks)
1115                 return 0;
1116
1117 fail_io:
1118         if (chd_img != NULL) {
1119                 free(chd_img->buffer);
1120                 free(chd_img);
1121                 chd_img = NULL;
1122         }
1123         return -1;
1124 }
1125 #endif
1126
1127 // this function tries to get the .sub file of the given .img
1128 static int opensubfile(const char *isoname) {
1129         char            subname[MAXPATHLEN];
1130
1131         // copy name of the iso and change extension from .img to .sub
1132         strncpy(subname, isoname, sizeof(subname));
1133         subname[MAXPATHLEN - 1] = '\0';
1134         if (strlen(subname) >= 4) {
1135                 strcpy(subname + strlen(subname) - 4, ".sub");
1136         }
1137         else {
1138                 return -1;
1139         }
1140
1141         subHandle = fopen(subname, "rb");
1142         if (subHandle == NULL) {
1143                 return -1;
1144         }
1145
1146         return 0;
1147 }
1148
1149 static int opensbifile(const char *isoname) {
1150         char            sbiname[MAXPATHLEN];
1151         int             s;
1152
1153         strncpy(sbiname, isoname, sizeof(sbiname));
1154         sbiname[MAXPATHLEN - 1] = '\0';
1155         if (strlen(sbiname) >= 4) {
1156                 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1157         }
1158         else {
1159                 return -1;
1160         }
1161
1162         fseek(cdHandle, 0, SEEK_END);
1163         s = ftell(cdHandle) / 2352;
1164
1165         return LoadSBI(sbiname, s);
1166 }
1167
1168 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1169 {
1170         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1171         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1172 }
1173
1174 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1175 {
1176         int ret;
1177
1178         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1179         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1180         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1181
1182         if (subChanRaw) DecodeRawSubData();
1183
1184         return ret;
1185 }
1186
1187 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1188 {
1189         static z_stream z;
1190         int ret = 0;
1191
1192         if (z.zalloc == NULL) {
1193                 // XXX: one-time leak here..
1194                 z.next_in = Z_NULL;
1195                 z.avail_in = 0;
1196                 z.zalloc = Z_NULL;
1197                 z.zfree = Z_NULL;
1198                 z.opaque = Z_NULL;
1199                 ret = inflateInit2(&z, -15);
1200         }
1201         else
1202                 ret = inflateReset(&z);
1203         if (ret != Z_OK)
1204                 return ret;
1205
1206         z.next_in = in;
1207         z.avail_in = in_size;
1208         z.next_out = out;
1209         z.avail_out = *out_size;
1210
1211         ret = inflate(&z, Z_NO_FLUSH);
1212         //inflateEnd(&z);
1213
1214         *out_size -= z.avail_out;
1215         return ret == 1 ? 0 : ret;
1216 }
1217
1218 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1219 {
1220         unsigned long cdbuffer_size, cdbuffer_size_expect;
1221         unsigned int size;
1222         int is_compressed;
1223         off_t start_byte;
1224         int ret, block;
1225
1226         if (base)
1227                 sector += base / 2352;
1228
1229         block = sector >> compr_img->block_shift;
1230         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1231
1232         if (block == compr_img->current_block) {
1233                 //printf("hit sect %d\n", sector);
1234                 goto finish;
1235         }
1236
1237         if (sector >= compr_img->index_len * 16) {
1238                 SysPrintf("sector %d is past img end\n", sector);
1239                 return -1;
1240         }
1241
1242         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1243         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1244                 SysPrintf("seek error for block %d at %llx: ",
1245                         block, (long long)start_byte);
1246                 perror(NULL);
1247                 return -1;
1248         }
1249
1250         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1251         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1252         if (size > sizeof(compr_img->buff_compressed)) {
1253                 SysPrintf("block %d is too large: %u\n", block, size);
1254                 return -1;
1255         }
1256
1257         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1258                                 1, size, cdHandle) != size) {
1259                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1260                 perror(NULL);
1261                 return -1;
1262         }
1263
1264         if (is_compressed) {
1265                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1266                 cdbuffer_size = cdbuffer_size_expect;
1267                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1268                 if (ret != 0) {
1269                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1270                                         ret, block, sector);
1271                         return -1;
1272                 }
1273                 if (cdbuffer_size != cdbuffer_size_expect)
1274                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1275                                         cdbuffer_size_expect, sector);
1276         }
1277
1278         // done at last!
1279         compr_img->current_block = block;
1280
1281 finish:
1282         if (dest != cdbuffer) // copy avoid HACK
1283                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1284                         CD_FRAMESIZE_RAW);
1285         return CD_FRAMESIZE_RAW;
1286 }
1287
1288 #ifdef HAVE_CHD
1289 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1290 {
1291         int hunk;
1292
1293         if (base)
1294                 sector += base;
1295
1296         hunk = sector / chd_img->sectors_per_hunk;
1297         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1298
1299         if (hunk != chd_img->current_hunk)
1300         {
1301                 chd_read(chd_img->chd, hunk, chd_img->buffer);
1302                 chd_img->current_hunk = hunk;
1303         }
1304
1305         if (dest != cdbuffer) // copy avoid HACK
1306                 memcpy(dest, chd_img->buffer[chd_img->sector_in_hunk],
1307                         CD_FRAMESIZE_RAW);
1308         return CD_FRAMESIZE_RAW;
1309 }
1310 #endif
1311
1312 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1313 {
1314         int ret;
1315
1316         fseek(f, base + sector * 2048, SEEK_SET);
1317         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1318
1319         // not really necessary, fake mode 2 header
1320         memset(cdbuffer, 0, 12 * 2);
1321         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1322         cdbuffer[12 + 3] = 1;
1323
1324         return ret;
1325 }
1326
1327 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1328         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1329 }
1330
1331 #ifdef HAVE_CHD
1332 static unsigned char *ISOgetBuffer_chd(void) {
1333         return chd_img->buffer[chd_img->sector_in_hunk] + 12;
1334 }
1335 #endif
1336
1337 static unsigned char * CALLBACK ISOgetBuffer(void) {
1338         return cdbuffer + 12;
1339 }
1340
1341 static void PrintTracks(void) {
1342         int i;
1343
1344         for (i = 1; i <= numtracks; i++) {
1345                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1346                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1347                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1348                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1349         }
1350 }
1351
1352 // This function is invoked by the front-end when opening an ISO
1353 // file for playback
1354 static long CALLBACK ISOopen(void) {
1355         boolean isMode1ISO = FALSE;
1356         char alt_bin_filename[MAXPATHLEN];
1357         const char *bin_filename;
1358
1359         if (cdHandle != NULL) {
1360                 return 0; // it's already open
1361         }
1362
1363         cdHandle = fopen(GetIsoFile(), "rb");
1364         if (cdHandle == NULL) {
1365                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1366                         GetIsoFile(), strerror(errno));
1367                 return -1;
1368         }
1369
1370         SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1371
1372         cddaBigEndian = FALSE;
1373         subChanMixed = FALSE;
1374         subChanRaw = FALSE;
1375         pregapOffset = 0;
1376         cdrIsoMultidiskCount = 1;
1377         multifile = 0;
1378
1379         CDR_getBuffer = ISOgetBuffer;
1380         cdimg_read_func = cdread_normal;
1381
1382         if (parsetoc(GetIsoFile()) == 0) {
1383                 SysPrintf("[+toc]");
1384         }
1385         else if (parseccd(GetIsoFile()) == 0) {
1386                 SysPrintf("[+ccd]");
1387         }
1388         else if (parsemds(GetIsoFile()) == 0) {
1389                 SysPrintf("[+mds]");
1390         }
1391         else if (parsecue(GetIsoFile()) == 0) {
1392                 SysPrintf("[+cue]");
1393         }
1394         if (handlepbp(GetIsoFile()) == 0) {
1395                 SysPrintf("[pbp]");
1396                 CDR_getBuffer = ISOgetBuffer_compr;
1397                 cdimg_read_func = cdread_compressed;
1398         }
1399         else if (handlecbin(GetIsoFile()) == 0) {
1400                 SysPrintf("[cbin]");
1401                 CDR_getBuffer = ISOgetBuffer_compr;
1402                 cdimg_read_func = cdread_compressed;
1403         }
1404
1405 #ifdef HAVE_CHD
1406         else if (handlechd(GetIsoFile()) == 0) {
1407                 printf("[chd]");
1408                 CDR_getBuffer = ISOgetBuffer_chd;
1409                 cdimg_read_func = cdread_chd;
1410         }
1411 #endif
1412
1413         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1414                 SysPrintf("[+sub]");
1415         }
1416         if (opensbifile(GetIsoFile()) == 0) {
1417                 SysPrintf("[+sbi]");
1418         }
1419
1420         fseeko(cdHandle, 0, SEEK_END);
1421
1422         // maybe user selected metadata file instead of main .bin ..
1423         bin_filename = GetIsoFile();
1424         if (ftello(cdHandle) < 2352 * 0x10) {
1425                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1426                 FILE *tmpf = NULL;
1427                 size_t i;
1428                 char *p;
1429
1430                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1431                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1432                 if (strlen(alt_bin_filename) >= 4) {
1433                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1434                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1435                                 strcpy(p, exts[i]);
1436                                 tmpf = fopen(alt_bin_filename, "rb");
1437                                 if (tmpf != NULL)
1438                                         break;
1439                         }
1440                 }
1441                 if (tmpf != NULL) {
1442                         bin_filename = alt_bin_filename;
1443                         fclose(cdHandle);
1444                         cdHandle = tmpf;
1445                         fseeko(cdHandle, 0, SEEK_END);
1446                 }
1447         }
1448
1449         // guess whether it is mode1/2048
1450         if (ftello(cdHandle) % 2048 == 0) {
1451                 unsigned int modeTest = 0;
1452                 fseek(cdHandle, 0, SEEK_SET);
1453                 fread(&modeTest, 4, 1, cdHandle);
1454                 if (SWAP32(modeTest) != 0xffffff00) {
1455                         SysPrintf("[2048]");
1456                         isMode1ISO = TRUE;
1457                 }
1458         }
1459         fseek(cdHandle, 0, SEEK_SET);
1460
1461         SysPrintf(".\n");
1462
1463         PrintTracks();
1464
1465         if (subChanMixed)
1466                 cdimg_read_func = cdread_sub_mixed;
1467         else if (isMode1ISO)
1468                 cdimg_read_func = cdread_2048;
1469
1470         // make sure we have another handle open for cdda
1471         if (numtracks > 1 && ti[1].handle == NULL) {
1472                 ti[1].handle = fopen(bin_filename, "rb");
1473         }
1474         cdda_cur_sector = 0;
1475         cdda_file_offset = 0;
1476
1477         return 0;
1478 }
1479
1480 static long CALLBACK ISOclose(void) {
1481         int i;
1482
1483         if (cdHandle != NULL) {
1484                 fclose(cdHandle);
1485                 cdHandle = NULL;
1486         }
1487         if (subHandle != NULL) {
1488                 fclose(subHandle);
1489                 subHandle = NULL;
1490         }
1491         stopCDDA();
1492         cddaHandle = NULL;
1493
1494         if (compr_img != NULL) {
1495                 free(compr_img->index_table);
1496                 free(compr_img);
1497                 compr_img = NULL;
1498         }
1499
1500 #ifdef HAVE_CHD
1501         if (chd_img != NULL) {
1502                 chd_close(chd_img->chd);
1503                 free(chd_img->buffer);
1504                 free(chd_img);
1505                 chd_img = NULL;
1506         }
1507 #endif
1508
1509         for (i = 1; i <= numtracks; i++) {
1510                 if (ti[i].handle != NULL) {
1511                         fclose(ti[i].handle);
1512                         ti[i].handle = NULL;
1513                 }
1514         }
1515         numtracks = 0;
1516         ti[1].type = 0;
1517         UnloadSBI();
1518
1519         memset(cdbuffer, 0, sizeof(cdbuffer));
1520         CDR_getBuffer = ISOgetBuffer;
1521
1522         return 0;
1523 }
1524
1525 static long CALLBACK ISOinit(void) {
1526         assert(cdHandle == NULL);
1527         assert(subHandle == NULL);
1528
1529         return 0; // do nothing
1530 }
1531
1532 static long CALLBACK ISOshutdown(void) {
1533         ISOclose();
1534         return 0;
1535 }
1536
1537 // return Starting and Ending Track
1538 // buffer:
1539 //  byte 0 - start track
1540 //  byte 1 - end track
1541 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1542         buffer[0] = 1;
1543
1544         if (numtracks > 0) {
1545                 buffer[1] = numtracks;
1546         }
1547         else {
1548                 buffer[1] = 1;
1549         }
1550
1551         return 0;
1552 }
1553
1554 // return Track Time
1555 // buffer:
1556 //  byte 0 - frame
1557 //  byte 1 - second
1558 //  byte 2 - minute
1559 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1560         if (track == 0) {
1561                 unsigned int sect;
1562                 unsigned char time[3];
1563                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1564                 sec2msf(sect, (char *)time);
1565                 buffer[2] = time[0];
1566                 buffer[1] = time[1];
1567                 buffer[0] = time[2];
1568         }
1569         else if (numtracks > 0 && track <= numtracks) {
1570                 buffer[2] = ti[track].start[0];
1571                 buffer[1] = ti[track].start[1];
1572                 buffer[0] = ti[track].start[2];
1573         }
1574         else {
1575                 buffer[2] = 0;
1576                 buffer[1] = 2;
1577                 buffer[0] = 0;
1578         }
1579
1580         return 0;
1581 }
1582
1583 // decode 'raw' subchannel data ripped by cdrdao
1584 static void DecodeRawSubData(void) {
1585         unsigned char subQData[12];
1586         int i;
1587
1588         memset(subQData, 0, sizeof(subQData));
1589
1590         for (i = 0; i < 8 * 12; i++) {
1591                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1592                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1593                 }
1594         }
1595
1596         memcpy(&subbuffer[12], subQData, 12);
1597 }
1598
1599 // read track
1600 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1601 // uses bcd format
1602 static long CALLBACK ISOreadTrack(unsigned char *time) {
1603         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1604         long ret;
1605
1606         if (cdHandle == NULL) {
1607                 return -1;
1608         }
1609
1610         if (pregapOffset) {
1611                 subChanMissing = FALSE;
1612                 if (sector >= pregapOffset) {
1613                         sector -= 2 * 75;
1614                         if (sector < pregapOffset)
1615                                 subChanMissing = TRUE;
1616                 }
1617         }
1618
1619         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1620         if (ret < 0)
1621                 return -1;
1622
1623         if (subHandle != NULL) {
1624                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1625                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1626
1627                 if (subChanRaw) DecodeRawSubData();
1628         }
1629
1630         return 0;
1631 }
1632
1633 // plays cdda audio
1634 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1635 // does NOT uses bcd format
1636 static long CALLBACK ISOplay(unsigned char *time) {
1637         unsigned int i;
1638
1639         if (numtracks <= 1)
1640                 return 0;
1641
1642         // find the track
1643         cdda_cur_sector = msf2sec((char *)time);
1644         for (i = numtracks; i > 1; i--) {
1645                 cdda_first_sector = msf2sec(ti[i].start);
1646                 if (cdda_first_sector <= cdda_cur_sector + 2 * 75)
1647                         break;
1648         }
1649         cdda_file_offset = ti[i].start_offset;
1650
1651         // find the file that contains this track
1652         for (; i > 1; i--)
1653                 if (ti[i].handle != NULL)
1654                         break;
1655
1656         cddaHandle = ti[i].handle;
1657
1658         if (SPU_playCDDAchannel != NULL)
1659                 startCDDA();
1660
1661         return 0;
1662 }
1663
1664 // stops cdda audio
1665 static long CALLBACK ISOstop(void) {
1666         stopCDDA();
1667         return 0;
1668 }
1669
1670 // gets subchannel data
1671 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1672         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1673                 return subbuffer;
1674         }
1675
1676         return NULL;
1677 }
1678
1679 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1680         u32 sect;
1681
1682         CDR__getStatus(stat);
1683
1684         if (playing) {
1685                 stat->Type = 0x02;
1686                 stat->Status |= 0x80;
1687         }
1688         else {
1689                 // BIOS - boot ID (CD type)
1690                 stat->Type = ti[1].type;
1691         }
1692
1693         // relative -> absolute time
1694         sect = cddaCurPos;
1695         sec2msf(sect, (char *)stat->Time);
1696
1697         return 0;
1698 }
1699
1700 // read CDDA sector into buffer
1701 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1702         unsigned char msf[3] = {m, s, f};
1703         unsigned int file, track, track_start = 0;
1704         int ret;
1705
1706         cddaCurPos = msf2sec((char *)msf);
1707
1708         // find current track index
1709         for (track = numtracks; ; track--) {
1710                 track_start = msf2sec(ti[track].start);
1711                 if (track_start <= cddaCurPos)
1712                         break;
1713                 if (track == 1)
1714                         break;
1715         }
1716
1717         // data tracks play silent
1718         if (ti[track].type != CDDA) {
1719                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1720                 return 0;
1721         }
1722
1723         file = 1;
1724         if (multifile) {
1725                 // find the file that contains this track
1726                 for (file = track; file > 1; file--)
1727                         if (ti[file].handle != NULL)
1728                                 break;
1729         }
1730
1731         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1732                 buffer, cddaCurPos - track_start);
1733         if (ret != CD_FRAMESIZE_RAW) {
1734                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1735                 return -1;
1736         }
1737
1738         if (cddaBigEndian) {
1739                 int i;
1740                 unsigned char tmp;
1741
1742                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1743                         tmp = buffer[i * 2];
1744                         buffer[i * 2] = buffer[i * 2 + 1];
1745                         buffer[i * 2 + 1] = tmp;
1746                 }
1747         }
1748
1749         return 0;
1750 }
1751
1752 void cdrIsoInit(void) {
1753         CDR_init = ISOinit;
1754         CDR_shutdown = ISOshutdown;
1755         CDR_open = ISOopen;
1756         CDR_close = ISOclose;
1757         CDR_getTN = ISOgetTN;
1758         CDR_getTD = ISOgetTD;
1759         CDR_readTrack = ISOreadTrack;
1760         CDR_getBuffer = ISOgetBuffer;
1761         CDR_play = ISOplay;
1762         CDR_stop = ISOstop;
1763         CDR_getBufferSub = ISOgetBufferSub;
1764         CDR_getStatus = ISOgetStatus;
1765         CDR_readCDDA = ISOreadCDDA;
1766
1767         CDR_getDriveLetter = CDR__getDriveLetter;
1768         CDR_configure = CDR__configure;
1769         CDR_test = CDR__test;
1770         CDR_about = CDR__about;
1771         CDR_setfilename = CDR__setfilename;
1772
1773         numtracks = 0;
1774 }
1775
1776 int cdrIsoActive(void) {
1777         return (cdHandle != NULL);
1778 }