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 #ifdef HAVE_CHD
  31 #include <chd.h>
  32 #endif
  33
  34 #ifdef _WIN32
  35 #define WIN32_LEAN_AND_MEAN
  36 #include <process.h>
  37 #include <windows.h>
  38 #define strcasecmp _stricmp
  39 #else
  40 #include <pthread.h>
  41 #include <sys/time.h>
  42 #include <unistd.h>
  43 #endif
  44
  45 #ifdef USE_LIBRETRO_VFS
  46 #include <streams/file_stream_transforms.h>
  47 #undef fseeko
  48 #undef ftello
  49 #define ftello rftell
  50 #define fseeko rfseek
  51 #endif
  52
  53 #define OFF_T_MSB ((off_t)1 << (sizeof(off_t) * 8 - 1))
  54
  55 unsigned int cdrIsoMultidiskCount;
  56 unsigned int cdrIsoMultidiskSelect;
  57
  58 static FILE *cdHandle = NULL;
  59 static FILE *cddaHandle = NULL;
  60 static FILE *subHandle = NULL;
  61
  62 static boolean subChanMixed = FALSE;
  63 static boolean subChanRaw = FALSE;
  64
  65 static boolean multifile = FALSE;
  66
  67 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
  68 static unsigned char subbuffer[SUB_FRAMESIZE];
  69
  70 static boolean playing = FALSE;
  71 static boolean cddaBigEndian = FALSE;
  72 /* Frame offset into CD image where pregap data would be found if it was there.
  73  * If a game seeks there we must *not* return subchannel data since it's
  74  * not in the CD image, so that cdrom code can fake subchannel data instead.
  75  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  76 static unsigned int pregapOffset;
  77
  78 static unsigned int cddaCurPos;
  79
  80 // compressed image stuff
  81 static struct {
  82         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  83         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  84         off_t *index_table;
  85         unsigned int index_len;
  86         unsigned int block_shift;
  87         unsigned int current_block;
  88         unsigned int sector_in_blk;
  89 } *compr_img;
  90
  91 #ifdef HAVE_CHD
  92 static struct {
  93         unsigned char (*buffer)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE];
  94         chd_file* chd;
  95         const chd_header* header;
  96         unsigned int sectors_per_hunk;
  97         unsigned int current_hunk;
  98         unsigned int sector_in_hunk;
  99 } *chd_img;
 100 #endif
 101
 102 static int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
 103 static int (*cdimg_read_sub_func)(FILE *f, int sector);
 104
 105 char* CALLBACK CDR__getDriveLetter(void);
 106 long CALLBACK CDR__configure(void);
 107 long CALLBACK CDR__test(void);
 108 void CALLBACK CDR__about(void);
 109 long CALLBACK CDR__setfilename(char *filename);
 110 long CALLBACK CDR__getStatus(struct CdrStat *stat);
 111
 112 static void DecodeRawSubData(void);
 113
 114 struct trackinfo {
 115         enum {DATA=1, CDDA} type;
 116         char start[3];          // MSF-format
 117         char length[3];         // MSF-format
 118         FILE *handle;           // for multi-track images CDDA
 119         unsigned int start_offset; // byte offset from start of above file
 120 };
 121
 122 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 123
 124 static int numtracks = 0;
 125 static struct trackinfo ti[MAXTRACKS];
 126
 127 // get a sector from a msf-array
 128 static unsigned int msf2sec(char *msf) {
 129         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 130 }
 131
 132 static void sec2msf(unsigned int s, char *msf) {
 133         msf[0] = s / 75 / 60;
 134         s = s - msf[0] * 75 * 60;
 135         msf[1] = s / 75;
 136         s = s - msf[1] * 75;
 137         msf[2] = s;
 138 }
 139
 140 // divide a string of xx:yy:zz into m, s, f
 141 static void tok2msf(char *time, char *msf) {
 142         char *token;
 143
 144         token = strtok(time, ":");
 145         if (token) {
 146                 msf[0] = atoi(token);
 147         }
 148         else {
 149                 msf[0] = 0;
 150         }
 151
 152         token = strtok(NULL, ":");
 153         if (token) {
 154                 msf[1] = atoi(token);
 155         }
 156         else {
 157                 msf[1] = 0;
 158         }
 159
 160         token = strtok(NULL, ":");
 161         if (token) {
 162                 msf[2] = atoi(token);
 163         }
 164         else {
 165                 msf[2] = 0;
 166         }
 167 }
 168
 169 // this function tries to get the .toc file of the given .bin
 170 // the necessary data is put into the ti (trackinformation)-array
 171 static int parsetoc(const char *isofile) {
 172         char                    tocname[MAXPATHLEN];
 173         FILE                    *fi;
 174         char                    linebuf[256], tmp[256], name[256];
 175         char                    *token;
 176         char                    time[20], time2[20];
 177         unsigned int    t, sector_offs, sector_size;
 178         unsigned int    current_zero_gap = 0;
 179
 180         numtracks = 0;
 181
 182         // copy name of the iso and change extension from .bin to .toc
 183         strncpy(tocname, isofile, sizeof(tocname));
 184         tocname[MAXPATHLEN - 1] = '\0';
 185         if (strlen(tocname) >= 4) {
 186                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 187         }
 188         else {
 189                 return -1;
 190         }
 191
 192         if ((fi = fopen(tocname, "r")) == NULL) {
 193                 // try changing extension to .cue (to satisfy some stupid tutorials)
 194                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 195                 if ((fi = fopen(tocname, "r")) == NULL) {
 196                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 197                         strcpy(tocname, isofile);
 198                         t = strlen(tocname);
 199                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 200                                 tocname[t - 4] = '\0';
 201                                 if ((fi = fopen(tocname, "r")) == NULL) {
 202                                         return -1;
 203                                 }
 204                         }
 205                         else {
 206                                 return -1;
 207                         }
 208                 }
 209                 // check if it's really a TOC named as a .cue
 210                 if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 211                         token = strtok(linebuf, " ");
 212                         if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 213                                 fclose(fi);
 214                                 return -1;
 215                         }
 216                 }
 217                 fseek(fi, 0, SEEK_SET);
 218         }
 219
 220         memset(&ti, 0, sizeof(ti));
 221         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 222
 223         sector_size = CD_FRAMESIZE_RAW;
 224         sector_offs = 2 * 75;
 225
 226         // parse the .toc file
 227         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 228                 // search for tracks
 229                 strncpy(tmp, linebuf, sizeof(linebuf));
 230                 token = strtok(tmp, " ");
 231
 232                 if (token == NULL) continue;
 233
 234                 if (!strcmp(token, "TRACK")) {
 235                         sector_offs += current_zero_gap;
 236                         current_zero_gap = 0;
 237
 238                         // get type of track
 239                         token = strtok(NULL, " ");
 240                         numtracks++;
 241
 242                         if (!strncmp(token, "MODE2_RAW", 9)) {
 243                                 ti[numtracks].type = DATA;
 244                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 245
 246                                 // check if this image contains mixed subchannel data
 247                                 token = strtok(NULL, " ");
 248                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 249                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 250                                         subChanMixed = TRUE;
 251                                         if (!strncmp(token, "RW_RAW", 6))
 252                                                 subChanRaw = TRUE;
 253                                 }
 254                         }
 255                         else if (!strncmp(token, "AUDIO", 5)) {
 256                                 ti[numtracks].type = CDDA;
 257                         }
 258                 }
 259                 else if (!strcmp(token, "DATAFILE")) {
 260                         if (ti[numtracks].type == CDDA) {
 261                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 262                                 ti[numtracks].start_offset = t;
 263                                 t = t / sector_size + sector_offs;
 264                                 sec2msf(t, (char *)&ti[numtracks].start);
 265                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 266                         }
 267                         else {
 268                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 269                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 270                         }
 271                 }
 272                 else if (!strcmp(token, "FILE")) {
 273                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 274                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 275                         t += msf2sec(ti[numtracks].start) * sector_size;
 276                         ti[numtracks].start_offset = t;
 277                         t = t / sector_size + sector_offs;
 278                         sec2msf(t, (char *)&ti[numtracks].start);
 279                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 280                 }
 281                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 282                         // skip unneeded optional fields
 283                         while (token != NULL) {
 284                                 token = strtok(NULL, " ");
 285                                 if (strchr(token, ':') != NULL)
 286                                         break;
 287                         }
 288                         if (token != NULL) {
 289                                 tok2msf(token, tmp);
 290                                 current_zero_gap = msf2sec(tmp);
 291                         }
 292                         if (numtracks > 1) {
 293                                 t = ti[numtracks - 1].start_offset;
 294                                 t /= sector_size;
 295                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 296                         }
 297                 }
 298                 else if (!strcmp(token, "START")) {
 299                         token = strtok(NULL, " ");
 300                         if (token != NULL && strchr(token, ':')) {
 301                                 tok2msf(token, tmp);
 302                                 t = msf2sec(tmp);
 303                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 304                                 t = msf2sec(ti[numtracks].start) + t;
 305                                 sec2msf(t, (char *)&ti[numtracks].start);
 306                         }
 307                 }
 308         }
 309
 310         fclose(fi);
 311
 312         return 0;
 313 }
 314
 315 // this function tries to get the .cue file of the given .bin
 316 // the necessary data is put into the ti (trackinformation)-array
 317 static int parsecue(const char *isofile) {
 318         char                    cuename[MAXPATHLEN];
 319         char                    filepath[MAXPATHLEN];
 320         char                    *incue_fname;
 321         FILE                    *fi;
 322         char                    *token;
 323         char                    time[20];
 324         char                    *tmp;
 325         char                    linebuf[256], tmpb[256], dummy[256];
 326         unsigned int    incue_max_len;
 327         unsigned int    t, file_len, mode, sector_offs;
 328         unsigned int    sector_size = 2352;
 329
 330         numtracks = 0;
 331
 332         // copy name of the iso and change extension from .bin to .cue
 333         strncpy(cuename, isofile, sizeof(cuename));
 334         cuename[MAXPATHLEN - 1] = '\0';
 335         if (strlen(cuename) >= 4) {
 336                 // If 'isofile' is a '.cd<X>' file, use it as a .cue file
 337                 //  and don't try to search the additional .cue file
 338                 if (strncasecmp(cuename + strlen(cuename) - 4, ".cd", 3) != 0 )
 339                         strcpy(cuename + strlen(cuename) - 4, ".cue");
 340         }
 341         else {
 342                 return -1;
 343         }
 344
 345         if ((fi = fopen(cuename, "r")) == NULL) {
 346                 return -1;
 347         }
 348
 349         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 350         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 351         // that...
 352         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 353                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 354                         // Don't proceed further, as this is actually a .toc file rather
 355                         // than a .cue file.
 356                         fclose(fi);
 357                         return parsetoc(isofile);
 358                 }
 359                 fseek(fi, 0, SEEK_SET);
 360         }
 361
 362         // build a path for files referenced in .cue
 363         strncpy(filepath, cuename, sizeof(filepath));
 364         tmp = strrchr(filepath, '/');
 365         if (tmp == NULL)
 366                 tmp = strrchr(filepath, '\\');
 367         if (tmp != NULL)
 368                 tmp++;
 369         else
 370                 tmp = filepath;
 371         *tmp = 0;
 372         filepath[sizeof(filepath) - 1] = 0;
 373         incue_fname = tmp;
 374         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 375
 376         memset(&ti, 0, sizeof(ti));
 377
 378         file_len = 0;
 379         sector_offs = 2 * 75;
 380
 381         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 382                 strncpy(dummy, linebuf, sizeof(linebuf));
 383                 token = strtok(dummy, " ");
 384
 385                 if (token == NULL) {
 386                         continue;
 387                 }
 388
 389                 if (!strcmp(token, "TRACK")) {
 390                         numtracks++;
 391
 392                         sector_size = 0;
 393                         if (strstr(linebuf, "AUDIO") != NULL) {
 394                                 ti[numtracks].type = CDDA;
 395                                 sector_size = 2352;
 396                         }
 397                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 398                                 ti[numtracks].type = DATA;
 399                         else {
 400                                 SysPrintf(".cue: failed to parse TRACK\n");
 401                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 402                         }
 403                         if (sector_size == 0)
 404                                 sector_size = 2352;
 405                 }
 406                 else if (!strcmp(token, "INDEX")) {
 407                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 408                                 SysPrintf(".cue: failed to parse INDEX\n");
 409                         tok2msf(time, (char *)&ti[numtracks].start);
 410
 411                         t = msf2sec(ti[numtracks].start);
 412                         ti[numtracks].start_offset = t * sector_size;
 413                         t += sector_offs;
 414                         sec2msf(t, ti[numtracks].start);
 415
 416                         // default track length to file length
 417                         t = file_len - ti[numtracks].start_offset / sector_size;
 418                         sec2msf(t, ti[numtracks].length);
 419
 420                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 421                                 // this track uses the same file as the last,
 422                                 // start of this track is last track's end
 423                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 424                                 sec2msf(t, ti[numtracks - 1].length);
 425                         }
 426                         if (numtracks > 1 && pregapOffset == -1)
 427                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 428                 }
 429                 else if (!strcmp(token, "PREGAP")) {
 430                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 431                                 tok2msf(time, dummy);
 432                                 sector_offs += msf2sec(dummy);
 433                         }
 434                         pregapOffset = -1; // mark to fill track start_offset
 435                 }
 436                 else if (!strcmp(token, "FILE")) {
 437                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 438                         if (t != 1)
 439                                 sscanf(linebuf, " FILE %255s", tmpb);
 440
 441                         tmp = strrchr(tmpb, '\\');
 442                         if (tmp == NULL)
 443                                 tmp = strrchr(tmpb, '/');
 444                         if (tmp != NULL)
 445                                 tmp++;
 446                         else
 447                                 tmp = tmpb;
 448                         strncpy(incue_fname, tmp, incue_max_len);
 449                         ti[numtracks + 1].handle = fopen(filepath, "rb");
 450
 451                         // update global offset if this is not first file in this .cue
 452                         if (numtracks + 1 > 1) {
 453                                 multifile = 1;
 454                                 sector_offs += file_len;
 455                         }
 456
 457                         file_len = 0;
 458                         if (ti[numtracks + 1].handle == NULL) {
 459                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 460                                 continue;
 461                         }
 462                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 463                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 464
 465                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 466                                 (strcmp(isofile + strlen(isofile) - 4, ".cue") == 0 ||
 467                                 strncasecmp(isofile + strlen(isofile) - 4, ".cd", 3) == 0)) {
 468                                 // user selected .cue/.cdX as image file, use it's data track instead
 469                                 fclose(cdHandle);
 470                                 cdHandle = fopen(filepath, "rb");
 471                         }
 472                 }
 473         }
 474
 475         fclose(fi);
 476
 477         // if there are no tracks detected, then it's not a cue file
 478         if (!numtracks)
 479                 return -1;
 480
 481         return 0;
 482 }
 483
 484 // this function tries to get the .ccd file of the given .img
 485 // the necessary data is put into the ti (trackinformation)-array
 486 static int parseccd(const char *isofile) {
 487         char                    ccdname[MAXPATHLEN];
 488         FILE                    *fi;
 489         char                    linebuf[256];
 490         unsigned int    t;
 491
 492         numtracks = 0;
 493
 494         // copy name of the iso and change extension from .img to .ccd
 495         strncpy(ccdname, isofile, sizeof(ccdname));
 496         ccdname[MAXPATHLEN - 1] = '\0';
 497         if (strlen(ccdname) >= 4) {
 498                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 499         }
 500         else {
 501                 return -1;
 502         }
 503
 504         if ((fi = fopen(ccdname, "r")) == NULL) {
 505                 return -1;
 506         }
 507
 508         memset(&ti, 0, sizeof(ti));
 509
 510         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 511                 if (!strncmp(linebuf, "[TRACK", 6)){
 512                         numtracks++;
 513                 }
 514                 else if (!strncmp(linebuf, "MODE=", 5)) {
 515                         sscanf(linebuf, "MODE=%d", &t);
 516                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 517                 }
 518                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 519                         sscanf(linebuf, "INDEX 1=%d", &t);
 520                         sec2msf(t + 2 * 75, ti[numtracks].start);
 521                         ti[numtracks].start_offset = t * 2352;
 522
 523                         // If we've already seen another track, this is its end
 524                         if (numtracks > 1) {
 525                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 526                                 sec2msf(t, ti[numtracks - 1].length);
 527                         }
 528                 }
 529         }
 530
 531         fclose(fi);
 532
 533         // Fill out the last track's end based on size
 534         if (numtracks >= 1) {
 535                 fseek(cdHandle, 0, SEEK_END);
 536                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 537                 sec2msf(t, ti[numtracks].length);
 538         }
 539
 540         return 0;
 541 }
 542
 543 // this function tries to get the .mds file of the given .mdf
 544 // the necessary data is put into the ti (trackinformation)-array
 545 static int parsemds(const char *isofile) {
 546         char                    mdsname[MAXPATHLEN];
 547         FILE                    *fi;
 548         unsigned int    offset, extra_offset, l, i;
 549         unsigned short  s;
 550
 551         numtracks = 0;
 552
 553         // copy name of the iso and change extension from .mdf to .mds
 554         strncpy(mdsname, isofile, sizeof(mdsname));
 555         mdsname[MAXPATHLEN - 1] = '\0';
 556         if (strlen(mdsname) >= 4) {
 557                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 558         }
 559         else {
 560                 return -1;
 561         }
 562
 563         if ((fi = fopen(mdsname, "rb")) == NULL) {
 564                 return -1;
 565         }
 566
 567         memset(&ti, 0, sizeof(ti));
 568
 569         // check if it's a valid mds file
 570         if (fread(&i, 1, sizeof(i), fi) != sizeof(i))
 571                 goto fail_io;
 572         i = SWAP32(i);
 573         if (i != 0x4944454D) {
 574                 // not an valid mds file
 575                 fclose(fi);
 576                 return -1;
 577         }
 578
 579         // get offset to session block
 580         fseek(fi, 0x50, SEEK_SET);
 581         if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
 582                 goto fail_io;
 583         offset = SWAP32(offset);
 584
 585         // get total number of tracks
 586         offset += 14;
 587         fseek(fi, offset, SEEK_SET);
 588         if (fread(&s, 1, sizeof(s), fi) != sizeof(s))
 589                 goto fail_io;
 590         s = SWAP16(s);
 591         numtracks = s;
 592
 593         // get offset to track blocks
 594         fseek(fi, 4, SEEK_CUR);
 595         if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
 596                 goto fail_io;
 597         offset = SWAP32(offset);
 598
 599         // skip lead-in data
 600         while (1) {
 601                 fseek(fi, offset + 4, SEEK_SET);
 602                 if (fgetc(fi) < 0xA0) {
 603                         break;
 604                 }
 605                 offset += 0x50;
 606         }
 607
 608         // check if the image contains mixed subchannel data
 609         fseek(fi, offset + 1, SEEK_SET);
 610         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 611
 612         // read track data
 613         for (i = 1; i <= numtracks; i++) {
 614                 fseek(fi, offset, SEEK_SET);
 615
 616                 // get the track type
 617                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 618                 fseek(fi, 8, SEEK_CUR);
 619
 620                 // get the track starting point
 621                 ti[i].start[0] = fgetc(fi);
 622                 ti[i].start[1] = fgetc(fi);
 623                 ti[i].start[2] = fgetc(fi);
 624
 625                 if (fread(&extra_offset, 1, sizeof(extra_offset), fi) != sizeof(extra_offset))
 626                         goto fail_io;
 627                 extra_offset = SWAP32(extra_offset);
 628
 629                 // get track start offset (in .mdf)
 630                 fseek(fi, offset + 0x28, SEEK_SET);
 631                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
 632                         goto fail_io;
 633                 l = SWAP32(l);
 634                 ti[i].start_offset = l;
 635
 636                 // get pregap
 637                 fseek(fi, extra_offset, SEEK_SET);
 638                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
 639                         goto fail_io;
 640                 l = SWAP32(l);
 641                 if (l != 0 && i > 1)
 642                         pregapOffset = msf2sec(ti[i].start);
 643
 644                 // get the track length
 645                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
 646                         goto fail_io;
 647                 l = SWAP32(l);
 648                 sec2msf(l, ti[i].length);
 649
 650                 offset += 0x50;
 651         }
 652         fclose(fi);
 653         return 0;
 654 fail_io:
 655 #ifndef NDEBUG
 656         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
 657 #endif
 658         fclose(fi);
 659         return -1;
 660 }
 661
 662 static int handlepbp(const char *isofile) {
 663         struct {
 664                 unsigned int sig;
 665                 unsigned int dontcare[8];
 666                 unsigned int psar_offs;
 667         } pbp_hdr;
 668         struct {
 669                 unsigned char type;
 670                 unsigned char pad0;
 671                 unsigned char track;
 672                 char index0[3];
 673                 char pad1;
 674                 char index1[3];
 675         } toc_entry;
 676         struct {
 677                 unsigned int offset;
 678                 unsigned int size;
 679                 unsigned int dontcare[6];
 680         } index_entry;
 681         char psar_sig[11];
 682         off_t psisoimg_offs, cdimg_base;
 683         unsigned int t, cd_length;
 684         unsigned int offsettab[8];
 685         unsigned int psar_offs, index_entry_size, index_entry_offset;
 686         const char *ext = NULL;
 687         int i, ret;
 688
 689         if (strlen(isofile) >= 4)
 690                 ext = isofile + strlen(isofile) - 4;
 691         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 692                 return -1;
 693
 694         fseeko(cdHandle, 0, SEEK_SET);
 695
 696         numtracks = 0;
 697
 698         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 699         if (ret != sizeof(pbp_hdr)) {
 700                 SysPrintf("failed to read pbp\n");
 701                 goto fail_io;
 702         }
 703
 704         psar_offs = SWAP32(pbp_hdr.psar_offs);
 705
 706         ret = fseeko(cdHandle, psar_offs, SEEK_SET);
 707         if (ret != 0) {
 708                 SysPrintf("failed to seek to %x\n", psar_offs);
 709                 goto fail_io;
 710         }
 711
 712         psisoimg_offs = psar_offs;
 713         if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
 714                 goto fail_io;
 715         psar_sig[10] = 0;
 716         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 717                 // multidisk image?
 718                 ret = fseeko(cdHandle, psar_offs + 0x200, SEEK_SET);
 719                 if (ret != 0) {
 720                         SysPrintf("failed to seek to %x\n", psar_offs + 0x200);
 721                         goto fail_io;
 722                 }
 723
 724                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 725                         SysPrintf("failed to read offsettab\n");
 726                         goto fail_io;
 727                 }
 728
 729                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 730                         if (offsettab[i] == 0)
 731                                 break;
 732                 }
 733                 cdrIsoMultidiskCount = i;
 734                 if (cdrIsoMultidiskCount == 0) {
 735                         SysPrintf("multidisk eboot has 0 images?\n");
 736                         goto fail_io;
 737                 }
 738
 739                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 740                         cdrIsoMultidiskSelect = 0;
 741
 742                 psisoimg_offs += SWAP32(offsettab[cdrIsoMultidiskSelect]);
 743
 744                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 745                 if (ret != 0) {
 746                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 747                         goto fail_io;
 748                 }
 749
 750                 if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
 751                         goto fail_io;
 752                 psar_sig[10] = 0;
 753         }
 754
 755         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 756                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 757                 goto fail_io;
 758         }
 759
 760         // seek to TOC
 761         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 762         if (ret != 0) {
 763                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 764                 goto fail_io;
 765         }
 766
 767         // first 3 entries are special
 768         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 769         if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
 770                 goto fail_io;
 771         numtracks = btoi(toc_entry.index1[0]);
 772
 773         if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
 774                 goto fail_io;
 775         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 776                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 777
 778         for (i = 1; i <= numtracks; i++) {
 779                 if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
 780                         goto fail_io;
 781
 782                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 783
 784                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 785                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 786                 ti[i].start_offset *= 2352;
 787                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 788                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 789                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 790
 791                 if (i > 1) {
 792                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 793                         sec2msf(t, ti[i - 1].length);
 794                 }
 795         }
 796         t = cd_length - ti[numtracks].start_offset / 2352;
 797         sec2msf(t, ti[numtracks].length);
 798
 799         // seek to ISO index
 800         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 801         if (ret != 0) {
 802                 SysPrintf("failed to seek to ISO index\n");
 803                 goto fail_io;
 804         }
 805
 806         compr_img = calloc(1, sizeof(*compr_img));
 807         if (compr_img == NULL)
 808                 goto fail_io;
 809
 810         compr_img->block_shift = 4;
 811         compr_img->current_block = (unsigned int)-1;
 812
 813         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 814         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 815         if (compr_img->index_table == NULL)
 816                 goto fail_io;
 817
 818         cdimg_base = psisoimg_offs + 0x100000;
 819         for (i = 0; i < compr_img->index_len; i++) {
 820                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 821                 if (ret != sizeof(index_entry)) {
 822                         SysPrintf("failed to read index_entry #%d\n", i);
 823                         goto fail_index;
 824                 }
 825
 826                 index_entry_size = SWAP32(index_entry.size);
 827                 index_entry_offset = SWAP32(index_entry.offset);
 828
 829                 if (index_entry_size == 0)
 830                         break;
 831
 832                 compr_img->index_table[i] = cdimg_base + index_entry_offset;
 833         }
 834         compr_img->index_table[i] = cdimg_base + index_entry_offset + index_entry_size;
 835
 836         return 0;
 837
 838 fail_index:
 839         free(compr_img->index_table);
 840         compr_img->index_table = NULL;
 841         goto done;
 842
 843 fail_io:
 844 #ifndef NDEBUG
 845         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
 846 #endif
 847
 848 done:
 849         if (compr_img != NULL) {
 850                 free(compr_img);
 851                 compr_img = NULL;
 852         }
 853         return -1;
 854 }
 855
 856 static int handlecbin(const char *isofile) {
 857         struct
 858         {
 859                 char magic[4];
 860                 unsigned int header_size;
 861                 unsigned long long total_bytes;
 862                 unsigned int block_size;
 863                 unsigned char ver;              // 1
 864                 unsigned char align;
 865                 unsigned char rsv_06[2];
 866         } ciso_hdr;
 867         const char *ext = NULL;
 868         unsigned int *index_table = NULL;
 869         unsigned int index = 0, plain;
 870         int i, ret;
 871
 872         if (strlen(isofile) >= 5)
 873                 ext = isofile + strlen(isofile) - 5;
 874         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 875                 return -1;
 876
 877         fseek(cdHandle, 0, SEEK_SET);
 878
 879         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 880         if (ret != sizeof(ciso_hdr)) {
 881                 SysPrintf("failed to read ciso header\n");
 882                 return -1;
 883         }
 884
 885         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 886                 SysPrintf("bad ciso header\n");
 887                 return -1;
 888         }
 889         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 890                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
 891                 if (ret != 0) {
 892                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 893                         return -1;
 894                 }
 895         }
 896
 897         compr_img = calloc(1, sizeof(*compr_img));
 898         if (compr_img == NULL)
 899                 goto fail_io;
 900
 901         compr_img->block_shift = 0;
 902         compr_img->current_block = (unsigned int)-1;
 903
 904         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
 905         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
 906         if (index_table == NULL)
 907                 goto fail_io;
 908
 909         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
 910         if (ret != compr_img->index_len) {
 911                 SysPrintf("failed to read index table\n");
 912                 goto fail_index;
 913         }
 914
 915         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 916         if (compr_img->index_table == NULL)
 917                 goto fail_index;
 918
 919         for (i = 0; i < compr_img->index_len + 1; i++) {
 920                 index = index_table[i];
 921                 plain = index & 0x80000000;
 922                 index &= 0x7fffffff;
 923                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
 924                 if (plain)
 925                         compr_img->index_table[i] |= OFF_T_MSB;
 926         }
 927
 928         return 0;
 929
 930 fail_index:
 931         free(index_table);
 932 fail_io:
 933         if (compr_img != NULL) {
 934                 free(compr_img);
 935                 compr_img = NULL;
 936         }
 937         return -1;
 938 }
 939
 940 #ifdef HAVE_CHD
 941 static int handlechd(const char *isofile) {
 942         int frame_offset = 150;
 943         int file_offset = 0;
 944
 945         chd_img = calloc(1, sizeof(*chd_img));
 946         if (chd_img == NULL)
 947                 goto fail_io;
 948
 949         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
 950                 goto fail_io;
 951
 952         if (Config.CHD_Precache && (chd_precache(chd_img->chd) != CHDERR_NONE))
 953                 goto fail_io;
 954
 955    chd_img->header = chd_get_header(chd_img->chd);
 956
 957    chd_img->buffer = malloc(chd_img->header->hunkbytes);
 958    if (chd_img->buffer == NULL)
 959                 goto fail_io;
 960
 961    chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
 962    chd_img->current_hunk = (unsigned int)-1;
 963
 964    cddaBigEndian = TRUE;
 965
 966         numtracks = 0;
 967         memset(ti, 0, sizeof(ti));
 968
 969    while (1)
 970    {
 971       struct {
 972          char type[64];
 973          char subtype[32];
 974          char pgtype[32];
 975          char pgsub[32];
 976          uint32_t track;
 977          uint32_t frames;
 978          uint32_t pregap;
 979          uint32_t postgap;
 980       } md = {};
 981       char meta[256];
 982       uint32_t meta_size = 0;
 983
 984       if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
 985          sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
 986       else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
 987          sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
 988       else
 989          break;
 990
 991                 SysPrintf("chd: %s\n", meta);
 992
 993                 if (md.track == 1) {
 994                         if (!strncmp(md.subtype, "RW", 2)) {
 995                                 subChanMixed = TRUE;
 996                                 if (!strcmp(md.subtype, "RW_RAW"))
 997                                         subChanRaw = TRUE;
 998                         }
 999                 }
1000
1001                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
1002
1003                 sec2msf(frame_offset + md.pregap, ti[md.track].start);
1004                 sec2msf(md.frames, ti[md.track].length);
1005
1006                 ti[md.track].start_offset = file_offset + md.pregap;
1007
1008                 // XXX: what about postgap?
1009                 frame_offset += md.frames;
1010                 file_offset += md.frames;
1011                 numtracks++;
1012         }
1013
1014         if (numtracks)
1015                 return 0;
1016
1017 fail_io:
1018         if (chd_img != NULL) {
1019                 free(chd_img->buffer);
1020                 free(chd_img);
1021                 chd_img = NULL;
1022         }
1023         return -1;
1024 }
1025 #endif
1026
1027 // this function tries to get the .sub file of the given .img
1028 static int opensubfile(const char *isoname) {
1029         char            subname[MAXPATHLEN];
1030
1031         // copy name of the iso and change extension from .img to .sub
1032         strncpy(subname, isoname, sizeof(subname));
1033         subname[MAXPATHLEN - 1] = '\0';
1034         if (strlen(subname) >= 4) {
1035                 strcpy(subname + strlen(subname) - 4, ".sub");
1036         }
1037         else {
1038                 return -1;
1039         }
1040
1041         subHandle = fopen(subname, "rb");
1042         if (subHandle == NULL) {
1043                 return -1;
1044         }
1045
1046         return 0;
1047 }
1048
1049 static int opensbifile(const char *isoname) {
1050         char            sbiname[MAXPATHLEN], disknum[MAXPATHLEN] = "0";
1051         int             s;
1052
1053         strncpy(sbiname, isoname, sizeof(sbiname));
1054         sbiname[MAXPATHLEN - 1] = '\0';
1055         if (strlen(sbiname) >= 4) {
1056                 if (cdrIsoMultidiskCount > 1) {
1057                         sprintf(disknum, "_%i.sbi", cdrIsoMultidiskSelect + 1);
1058                         strcpy(sbiname + strlen(sbiname) - 4, disknum);
1059                 }
1060                 else
1061                         strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1062         }
1063         else {
1064                 return -1;
1065         }
1066
1067         fseek(cdHandle, 0, SEEK_END);
1068         s = ftell(cdHandle) / 2352;
1069
1070         return LoadSBI(sbiname, s);
1071 }
1072
1073 #ifdef _WIN32
1074 static void readThreadStop() {}
1075 static void readThreadStart() {}
1076 #else
1077 static pthread_t read_thread_id;
1078
1079 static pthread_cond_t read_thread_msg_avail;
1080 static pthread_cond_t read_thread_msg_done;
1081 static pthread_mutex_t read_thread_msg_lock;
1082
1083 static pthread_cond_t sectorbuffer_cond;
1084 static pthread_mutex_t sectorbuffer_lock;
1085
1086 static boolean read_thread_running = FALSE;
1087 static int read_thread_sector_start = -1;
1088 static int read_thread_sector_end = -1;
1089
1090 typedef struct {
1091   int sector;
1092   long ret;
1093   unsigned char data[CD_FRAMESIZE_RAW];
1094 } SectorBufferEntry;
1095
1096 #define SECTOR_BUFFER_SIZE 4096
1097
1098 static SectorBufferEntry *sectorbuffer;
1099 static size_t sectorbuffer_index;
1100
1101 int (*sync_cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
1102 unsigned char *(*sync_CDR_getBuffer)(void);
1103
1104 static unsigned char * CALLBACK ISOgetBuffer_async(void);
1105 static int cdread_async(FILE *f, unsigned int base, void *dest, int sector);
1106
1107 static void *readThreadMain(void *param) {
1108   int max_sector = -1;
1109   int requested_sector_start = -1;
1110   int requested_sector_end = -1;
1111   int last_read_sector = -1;
1112   int index = 0;
1113
1114   int ra_sector = -1;
1115   int max_ra = 128;
1116   int initial_ra = 1;
1117   int speedmult_ra = 4;
1118
1119   int ra_count = 0;
1120   int how_far_ahead = 0;
1121
1122   unsigned char tmpdata[CD_FRAMESIZE_RAW];
1123   long ret;
1124
1125   max_sector = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1126
1127   while(1) {
1128     pthread_mutex_lock(&read_thread_msg_lock);
1129
1130     // If we don't have readahead and we don't have a sector request, wait for one.
1131     // If we still have readahead to go, don't block, just keep going.
1132     // And if we ever have a sector request pending, acknowledge and reset it.
1133
1134     if (!ra_count) {
1135       if (read_thread_sector_start == -1 && read_thread_running) {
1136         pthread_cond_wait(&read_thread_msg_avail, &read_thread_msg_lock);
1137       }
1138     }
1139
1140     if (read_thread_sector_start != -1) {
1141       requested_sector_start = read_thread_sector_start;
1142       requested_sector_end = read_thread_sector_end;
1143       read_thread_sector_start = -1;
1144       read_thread_sector_end = -1;
1145       pthread_cond_signal(&read_thread_msg_done);
1146     }
1147
1148     pthread_mutex_unlock(&read_thread_msg_lock);
1149
1150     if (!read_thread_running)
1151       break;
1152
1153     // Readahead code, based on the implementation in mednafen psx's cdromif.cpp
1154     if (requested_sector_start != -1) {
1155       if (last_read_sector != -1 && last_read_sector == (requested_sector_start - 1)) {
1156         how_far_ahead = ra_sector - requested_sector_end;
1157
1158         if(how_far_ahead <= max_ra)
1159           ra_count = (max_ra - how_far_ahead + 1 ? max_ra - how_far_ahead + 1 : speedmult_ra);
1160         else
1161           ra_count++;
1162       } else if (requested_sector_end != last_read_sector) {
1163         ra_sector = requested_sector_end;
1164         ra_count = initial_ra;
1165       }
1166
1167       last_read_sector = requested_sector_end;
1168     }
1169
1170     index = ra_sector % SECTOR_BUFFER_SIZE;
1171
1172     // check for end of CD
1173     if (ra_count && ra_sector >= max_sector) {
1174       ra_count = 0;
1175       pthread_mutex_lock(&sectorbuffer_lock);
1176       sectorbuffer[index].ret = -1;
1177       sectorbuffer[index].sector = ra_sector;
1178       pthread_cond_signal(&sectorbuffer_cond);
1179       pthread_mutex_unlock(&sectorbuffer_lock);
1180     }
1181
1182     if (ra_count) {
1183       pthread_mutex_lock(&sectorbuffer_lock);
1184       if (sectorbuffer[index].sector != ra_sector) {
1185         pthread_mutex_unlock(&sectorbuffer_lock);
1186
1187         ret = sync_cdimg_read_func(cdHandle, 0, tmpdata, ra_sector);
1188
1189         pthread_mutex_lock(&sectorbuffer_lock);
1190         sectorbuffer[index].ret = ret;
1191         sectorbuffer[index].sector = ra_sector;
1192         memcpy(sectorbuffer[index].data, tmpdata, CD_FRAMESIZE_RAW);
1193       }
1194       pthread_cond_signal(&sectorbuffer_cond);
1195       pthread_mutex_unlock(&sectorbuffer_lock);
1196
1197       ra_sector++;
1198       ra_count--;
1199     }
1200   }
1201
1202   return NULL;
1203 }
1204
1205 static void readThreadStop() {
1206   if (read_thread_running == TRUE) {
1207     read_thread_running = FALSE;
1208     pthread_cond_signal(&read_thread_msg_avail);
1209     pthread_join(read_thread_id, NULL);
1210   }
1211
1212   pthread_cond_destroy(&read_thread_msg_done);
1213   pthread_cond_destroy(&read_thread_msg_avail);
1214   pthread_mutex_destroy(&read_thread_msg_lock);
1215
1216   pthread_cond_destroy(&sectorbuffer_cond);
1217   pthread_mutex_destroy(&sectorbuffer_lock);
1218
1219   CDR_getBuffer = sync_CDR_getBuffer;
1220   cdimg_read_func = sync_cdimg_read_func;
1221
1222   free(sectorbuffer);
1223   sectorbuffer = NULL;
1224 }
1225
1226 static void readThreadStart() {
1227   SysPrintf("Starting async CD thread\n");
1228
1229   if (read_thread_running == TRUE)
1230     return;
1231
1232   read_thread_running = TRUE;
1233   read_thread_sector_start = -1;
1234   read_thread_sector_end = -1;
1235   sectorbuffer_index = 0;
1236
1237   sectorbuffer = calloc(SECTOR_BUFFER_SIZE, sizeof(SectorBufferEntry));
1238   if(!sectorbuffer)
1239     goto error;
1240
1241   sectorbuffer[0].sector = -1; // Otherwise we might think we've already fetched sector 0!
1242
1243   sync_CDR_getBuffer = CDR_getBuffer;
1244   CDR_getBuffer = ISOgetBuffer_async;
1245   sync_cdimg_read_func = cdimg_read_func;
1246   cdimg_read_func = cdread_async;
1247
1248   if (pthread_cond_init(&read_thread_msg_avail, NULL) ||
1249       pthread_cond_init(&read_thread_msg_done, NULL) ||
1250       pthread_mutex_init(&read_thread_msg_lock, NULL) ||
1251       pthread_cond_init(&sectorbuffer_cond, NULL) ||
1252       pthread_mutex_init(&sectorbuffer_lock, NULL) ||
1253       pthread_create(&read_thread_id, NULL, readThreadMain, NULL))
1254     goto error;
1255
1256   return;
1257
1258  error:
1259   SysPrintf("Error starting async CD thread\n");
1260   SysPrintf("Falling back to sync\n");
1261
1262   readThreadStop();
1263 }
1264 #endif
1265
1266 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1267 {
1268         int ret;
1269         if (fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET))
1270                 goto fail_io;
1271         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1272         if (ret <= 0)
1273                 goto fail_io;
1274         return ret;
1275
1276 fail_io:
1277         // often happens in cdda gaps of a split cue/bin, so not logged
1278         //SysPrintf("File IO error %d, base %u, sector %u\n", errno, base, sector);
1279         return -1;
1280 }
1281
1282 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1283 {
1284         int ret;
1285
1286         if (fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET))
1287                 goto fail_io;
1288         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1289         if (ret <= 0)
1290                 goto fail_io;
1291         return ret;
1292
1293 fail_io:
1294         //SysPrintf("File IO error %d, base %u, sector %u\n", errno, base, sector);
1295         return -1;
1296 }
1297
1298 static int cdread_sub_sub_mixed(FILE *f, int sector)
1299 {
1300         if (fseek(f, sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE) + CD_FRAMESIZE_RAW, SEEK_SET))
1301                 goto fail_io;
1302         if (fread(subbuffer, 1, SUB_FRAMESIZE, f) != SUB_FRAMESIZE)
1303                 goto fail_io;
1304
1305         return SUB_FRAMESIZE;
1306
1307 fail_io:
1308         SysPrintf("subchannel: file IO error %d, sector %u\n", errno, sector);
1309         return -1;
1310 }
1311
1312 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1313 {
1314         static z_stream z;
1315         int ret = 0;
1316
1317         if (z.zalloc == NULL) {
1318                 // XXX: one-time leak here..
1319                 z.next_in = Z_NULL;
1320                 z.avail_in = 0;
1321                 z.zalloc = Z_NULL;
1322                 z.zfree = Z_NULL;
1323                 z.opaque = Z_NULL;
1324                 ret = inflateInit2(&z, -15);
1325         }
1326         else
1327                 ret = inflateReset(&z);
1328         if (ret != Z_OK)
1329                 return ret;
1330
1331         z.next_in = in;
1332         z.avail_in = in_size;
1333         z.next_out = out;
1334         z.avail_out = *out_size;
1335
1336         ret = inflate(&z, Z_NO_FLUSH);
1337         //inflateEnd(&z);
1338
1339         *out_size -= z.avail_out;
1340         return ret == 1 ? 0 : ret;
1341 }
1342
1343 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1344 {
1345         unsigned long cdbuffer_size, cdbuffer_size_expect;
1346         unsigned int size;
1347         int is_compressed;
1348         off_t start_byte;
1349         int ret, block;
1350
1351         if (base)
1352                 sector += base / 2352;
1353
1354         block = sector >> compr_img->block_shift;
1355         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1356
1357         if (block == compr_img->current_block) {
1358                 //printf("hit sect %d\n", sector);
1359                 goto finish;
1360         }
1361
1362         if (sector >= compr_img->index_len * 16) {
1363                 SysPrintf("sector %d is past img end\n", sector);
1364                 return -1;
1365         }
1366
1367         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1368         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1369                 SysPrintf("seek error for block %d at %llx: ",
1370                         block, (long long)start_byte);
1371                 perror(NULL);
1372                 return -1;
1373         }
1374
1375         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1376         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1377         if (size > sizeof(compr_img->buff_compressed)) {
1378                 SysPrintf("block %d is too large: %u\n", block, size);
1379                 return -1;
1380         }
1381
1382         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1383                                 1, size, cdHandle) != size) {
1384                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1385                 perror(NULL);
1386                 return -1;
1387         }
1388
1389         if (is_compressed) {
1390                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1391                 cdbuffer_size = cdbuffer_size_expect;
1392                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1393                 if (ret != 0) {
1394                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1395                                         ret, block, sector);
1396                         return -1;
1397                 }
1398                 if (cdbuffer_size != cdbuffer_size_expect)
1399                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1400                                         cdbuffer_size_expect, sector);
1401         }
1402
1403         // done at last!
1404         compr_img->current_block = block;
1405
1406 finish:
1407         if (dest != cdbuffer) // copy avoid HACK
1408                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1409                         CD_FRAMESIZE_RAW);
1410         return CD_FRAMESIZE_RAW;
1411 }
1412
1413 #ifdef HAVE_CHD
1414 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1415 {
1416         int hunk;
1417
1418         sector += base;
1419
1420         hunk = sector / chd_img->sectors_per_hunk;
1421         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1422
1423         if (hunk != chd_img->current_hunk)
1424         {
1425                 chd_read(chd_img->chd, hunk, chd_img->buffer);
1426                 chd_img->current_hunk = hunk;
1427         }
1428
1429         if (dest != cdbuffer) // copy avoid HACK
1430                 memcpy(dest, chd_img->buffer[chd_img->sector_in_hunk],
1431                         CD_FRAMESIZE_RAW);
1432         return CD_FRAMESIZE_RAW;
1433 }
1434
1435 static int cdread_sub_chd(FILE *f, int sector)
1436 {
1437         int hunk;
1438
1439         if (!subChanMixed)
1440                 return -1;
1441
1442         hunk = sector / chd_img->sectors_per_hunk;
1443         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1444
1445         if (hunk != chd_img->current_hunk)
1446         {
1447                 chd_read(chd_img->chd, hunk, chd_img->buffer);
1448                 chd_img->current_hunk = hunk;
1449         }
1450
1451         memcpy(subbuffer, chd_img->buffer[chd_img->sector_in_hunk] + CD_FRAMESIZE_RAW, SUB_FRAMESIZE);
1452         return SUB_FRAMESIZE;
1453 }
1454 #endif
1455
1456 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1457 {
1458         int ret;
1459
1460         fseek(f, base + sector * 2048, SEEK_SET);
1461         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1462
1463         // not really necessary, fake mode 2 header
1464         memset(cdbuffer, 0, 12 * 2);
1465         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1466         cdbuffer[12 + 3] = 1;
1467
1468         return 12*2 + ret;
1469 }
1470
1471 #ifndef _WIN32
1472
1473 static int cdread_async(FILE *f, unsigned int base, void *dest, int sector) {
1474   boolean found = FALSE;
1475   int i = sector % SECTOR_BUFFER_SIZE;
1476   long ret;
1477
1478   if (f != cdHandle || base != 0 || dest != cdbuffer) {
1479     // Async reads are only supported for cdbuffer, so call the sync
1480     // function directly.
1481     return sync_cdimg_read_func(f, base, dest, sector);
1482   }
1483
1484   pthread_mutex_lock(&read_thread_msg_lock);
1485
1486   // Only wait if we're not trying to read the next sector and
1487   // sector_start is set (meaning the last request hasn't been
1488   // processed yet)
1489   while(read_thread_sector_start != -1 && read_thread_sector_end + 1 != sector) {
1490     pthread_cond_wait(&read_thread_msg_done, &read_thread_msg_lock);
1491   }
1492
1493   if (read_thread_sector_start == -1)
1494     read_thread_sector_start = sector;
1495
1496   read_thread_sector_end = sector;
1497   pthread_cond_signal(&read_thread_msg_avail);
1498   pthread_mutex_unlock(&read_thread_msg_lock);
1499
1500   do {
1501     pthread_mutex_lock(&sectorbuffer_lock);
1502     if (sectorbuffer[i].sector == sector) {
1503       sectorbuffer_index = i;
1504       ret = sectorbuffer[i].ret;
1505       found = TRUE;
1506     }
1507
1508     if (!found) {
1509       pthread_cond_wait(&sectorbuffer_cond, &sectorbuffer_lock);
1510     }
1511     pthread_mutex_unlock(&sectorbuffer_lock);
1512   } while (!found);
1513
1514   return ret;
1515 }
1516
1517 #endif
1518
1519 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1520         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1521 }
1522
1523 #ifdef HAVE_CHD
1524 static unsigned char * CALLBACK ISOgetBuffer_chd(void) {
1525         return chd_img->buffer[chd_img->sector_in_hunk] + 12;
1526 }
1527 #endif
1528
1529 #ifndef _WIN32
1530 static unsigned char * CALLBACK ISOgetBuffer_async(void) {
1531   unsigned char *buffer;
1532   pthread_mutex_lock(&sectorbuffer_lock);
1533   buffer = sectorbuffer[sectorbuffer_index].data;
1534   pthread_mutex_unlock(&sectorbuffer_lock);
1535   return buffer + 12;
1536 }
1537
1538 #endif
1539
1540 static unsigned char * CALLBACK ISOgetBuffer(void) {
1541         return cdbuffer + 12;
1542 }
1543
1544 static void PrintTracks(void) {
1545         int i;
1546
1547         for (i = 1; i <= numtracks; i++) {
1548                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1549                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1550                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1551                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1552         }
1553 }
1554
1555 // This function is invoked by the front-end when opening an ISO
1556 // file for playback
1557 static long CALLBACK ISOopen(void) {
1558         boolean isMode1ISO = FALSE;
1559         char alt_bin_filename[MAXPATHLEN];
1560         const char *bin_filename;
1561         char image_str[1024];
1562         int is_chd = 0;
1563
1564         if (cdHandle != NULL) {
1565                 return 0; // it's already open
1566         }
1567
1568         cdHandle = fopen(GetIsoFile(), "rb");
1569         if (cdHandle == NULL) {
1570                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1571                         GetIsoFile(), strerror(errno));
1572                 return -1;
1573         }
1574
1575         snprintf(image_str, sizeof(image_str) - 6*4 - 1,
1576                 "Loaded CD Image: %s", GetIsoFile());
1577
1578         cddaBigEndian = FALSE;
1579         subChanMixed = FALSE;
1580         subChanRaw = FALSE;
1581         pregapOffset = 0;
1582         cdrIsoMultidiskCount = 1;
1583         multifile = 0;
1584
1585         CDR_getBuffer = ISOgetBuffer;
1586         cdimg_read_func = cdread_normal;
1587         cdimg_read_sub_func = NULL;
1588
1589         if (parsetoc(GetIsoFile()) == 0) {
1590                 strcat(image_str, "[+toc]");
1591         }
1592         else if (parseccd(GetIsoFile()) == 0) {
1593                 strcat(image_str, "[+ccd]");
1594         }
1595         else if (parsemds(GetIsoFile()) == 0) {
1596                 strcat(image_str, "[+mds]");
1597         }
1598         else if (parsecue(GetIsoFile()) == 0) {
1599                 strcat(image_str, "[+cue]");
1600         }
1601         if (handlepbp(GetIsoFile()) == 0) {
1602                 strcat(image_str, "[+pbp]");
1603                 CDR_getBuffer = ISOgetBuffer_compr;
1604                 cdimg_read_func = cdread_compressed;
1605         }
1606         else if (handlecbin(GetIsoFile()) == 0) {
1607                 strcat(image_str, "[+cbin]");
1608                 CDR_getBuffer = ISOgetBuffer_compr;
1609                 cdimg_read_func = cdread_compressed;
1610         }
1611 #ifdef HAVE_CHD
1612         else if (handlechd(GetIsoFile()) == 0) {
1613                 strcat(image_str, "[+chd]");
1614                 CDR_getBuffer = ISOgetBuffer_chd;
1615                 cdimg_read_func = cdread_chd;
1616                 cdimg_read_sub_func = cdread_sub_chd;
1617                 is_chd = 1;
1618         }
1619 #endif
1620
1621         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1622                 strcat(image_str, "[+sub]");
1623         }
1624         if (opensbifile(GetIsoFile()) == 0) {
1625                 strcat(image_str, "[+sbi]");
1626         }
1627
1628         fseeko(cdHandle, 0, SEEK_END);
1629
1630         // maybe user selected metadata file instead of main .bin ..
1631         bin_filename = GetIsoFile();
1632         if (ftello(cdHandle) < 2352 * 0x10) {
1633                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1634                 FILE *tmpf = NULL;
1635                 size_t i;
1636                 char *p;
1637
1638                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1639                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1640                 if (strlen(alt_bin_filename) >= 4) {
1641                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1642                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1643                                 strcpy(p, exts[i]);
1644                                 tmpf = fopen(alt_bin_filename, "rb");
1645                                 if (tmpf != NULL)
1646                                         break;
1647                         }
1648                 }
1649                 if (tmpf != NULL) {
1650                         bin_filename = alt_bin_filename;
1651                         fclose(cdHandle);
1652                         cdHandle = tmpf;
1653                         fseeko(cdHandle, 0, SEEK_END);
1654                 }
1655         }
1656
1657         // guess whether it is mode1/2048
1658         if (ftello(cdHandle) % 2048 == 0) {
1659                 unsigned int modeTest = 0;
1660                 fseek(cdHandle, 0, SEEK_SET);
1661                 if (!fread(&modeTest, sizeof(modeTest), 1, cdHandle)) {
1662 #ifndef NDEBUG
1663                         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
1664 #endif
1665                         return -1;
1666                 }
1667                 if (SWAP32(modeTest) != 0xffffff00) {
1668                         strcat(image_str, "[2048]");
1669                         isMode1ISO = TRUE;
1670                 }
1671         }
1672         fseek(cdHandle, 0, SEEK_SET);
1673
1674         SysPrintf("%s.\n", image_str);
1675
1676         PrintTracks();
1677
1678         if (subChanMixed && !is_chd) {
1679                 cdimg_read_func = cdread_sub_mixed;
1680                 cdimg_read_sub_func = cdread_sub_sub_mixed;
1681         }
1682         else if (isMode1ISO) {
1683                 cdimg_read_func = cdread_2048;
1684                 cdimg_read_sub_func = NULL;
1685         }
1686
1687         // make sure we have another handle open for cdda
1688         if (numtracks > 1 && ti[1].handle == NULL) {
1689                 ti[1].handle = fopen(bin_filename, "rb");
1690         }
1691
1692   if (Config.AsyncCD) {
1693     readThreadStart();
1694   }
1695         return 0;
1696 }
1697
1698 static long CALLBACK ISOclose(void) {
1699         int i;
1700
1701         if (cdHandle != NULL) {
1702                 fclose(cdHandle);
1703                 cdHandle = NULL;
1704         }
1705         if (subHandle != NULL) {
1706                 fclose(subHandle);
1707                 subHandle = NULL;
1708         }
1709         playing = FALSE;
1710         cddaHandle = NULL;
1711
1712         if (compr_img != NULL) {
1713                 free(compr_img->index_table);
1714                 free(compr_img);
1715                 compr_img = NULL;
1716         }
1717
1718 #ifdef HAVE_CHD
1719         if (chd_img != NULL) {
1720                 chd_close(chd_img->chd);
1721                 free(chd_img->buffer);
1722                 free(chd_img);
1723                 chd_img = NULL;
1724         }
1725 #endif
1726
1727         for (i = 1; i <= numtracks; i++) {
1728                 if (ti[i].handle != NULL) {
1729                         fclose(ti[i].handle);
1730                         ti[i].handle = NULL;
1731                 }
1732         }
1733         numtracks = 0;
1734         ti[1].type = 0;
1735         UnloadSBI();
1736
1737         memset(cdbuffer, 0, sizeof(cdbuffer));
1738         CDR_getBuffer = ISOgetBuffer;
1739
1740         if (Config.AsyncCD) {
1741                 readThreadStop();
1742         }
1743
1744         return 0;
1745 }
1746
1747 static long CALLBACK ISOinit(void) {
1748         assert(cdHandle == NULL);
1749         assert(subHandle == NULL);
1750
1751         return 0; // do nothing
1752 }
1753
1754 static long CALLBACK ISOshutdown(void) {
1755         ISOclose();
1756         return 0;
1757 }
1758
1759 // return Starting and Ending Track
1760 // buffer:
1761 //  byte 0 - start track
1762 //  byte 1 - end track
1763 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1764         buffer[0] = 1;
1765
1766         if (numtracks > 0) {
1767                 buffer[1] = numtracks;
1768         }
1769         else {
1770                 buffer[1] = 1;
1771         }
1772
1773         return 0;
1774 }
1775
1776 // return Track Time
1777 // buffer:
1778 //  byte 0 - frame
1779 //  byte 1 - second
1780 //  byte 2 - minute
1781 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1782         if (track == 0) {
1783                 unsigned int sect;
1784                 unsigned char time[3];
1785                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1786                 sec2msf(sect, (char *)time);
1787                 buffer[2] = time[0];
1788                 buffer[1] = time[1];
1789                 buffer[0] = time[2];
1790         }
1791         else if (numtracks > 0 && track <= numtracks) {
1792                 buffer[2] = ti[track].start[0];
1793                 buffer[1] = ti[track].start[1];
1794                 buffer[0] = ti[track].start[2];
1795         }
1796         else {
1797                 buffer[2] = 0;
1798                 buffer[1] = 2;
1799                 buffer[0] = 0;
1800         }
1801
1802         return 0;
1803 }
1804
1805 // decode 'raw' subchannel data ripped by cdrdao
1806 static void DecodeRawSubData(void) {
1807         unsigned char subQData[12];
1808         int i;
1809
1810         memset(subQData, 0, sizeof(subQData));
1811
1812         for (i = 0; i < 8 * 12; i++) {
1813                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1814                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1815                 }
1816         }
1817
1818         memcpy(&subbuffer[12], subQData, 12);
1819 }
1820
1821 // read track
1822 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1823 // uses bcd format
1824 static boolean CALLBACK ISOreadTrack(unsigned char *time) {
1825         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1826         long ret;
1827
1828         if (cdHandle == NULL) {
1829                 return 0;
1830         }
1831
1832         if (pregapOffset && sector >= pregapOffset)
1833                 sector -= 2 * 75;
1834
1835         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1836         if (ret < 12*2 + 2048)
1837                 return 0;
1838
1839         return 1;
1840 }
1841
1842 // plays cdda audio
1843 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1844 // does NOT uses bcd format
1845 static long CALLBACK ISOplay(unsigned char *time) {
1846         playing = TRUE;
1847         return 0;
1848 }
1849
1850 // stops cdda audio
1851 static long CALLBACK ISOstop(void) {
1852         playing = FALSE;
1853         return 0;
1854 }
1855
1856 // gets subchannel data
1857 static unsigned char* CALLBACK ISOgetBufferSub(int sector) {
1858         if (pregapOffset && sector >= pregapOffset) {
1859                 sector -= 2 * 75;
1860                 if (sector < pregapOffset) // ?
1861                         return NULL;
1862         }
1863
1864         if (cdimg_read_sub_func != NULL) {
1865                 if (cdimg_read_sub_func(cdHandle, sector) != SUB_FRAMESIZE)
1866                         return NULL;
1867         }
1868         else if (subHandle != NULL) {
1869                 if (fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET))
1870                         return NULL;
1871                 if (fread(subbuffer, 1, SUB_FRAMESIZE, subHandle) != SUB_FRAMESIZE)
1872                         return NULL;
1873         }
1874         else {
1875                 return NULL;
1876         }
1877
1878         if (subChanRaw) DecodeRawSubData();
1879         return subbuffer;
1880 }
1881
1882 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1883         u32 sect;
1884
1885         CDR__getStatus(stat);
1886
1887         if (playing) {
1888                 stat->Type = 0x02;
1889                 stat->Status |= 0x80;
1890         }
1891         else {
1892                 // BIOS - boot ID (CD type)
1893                 stat->Type = ti[1].type;
1894         }
1895
1896         // relative -> absolute time
1897         sect = cddaCurPos;
1898         sec2msf(sect, (char *)stat->Time);
1899
1900         return 0;
1901 }
1902
1903 // read CDDA sector into buffer
1904 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1905         unsigned char msf[3] = {m, s, f};
1906         unsigned int file, track, track_start = 0;
1907         int ret;
1908
1909         cddaCurPos = msf2sec((char *)msf);
1910
1911         // find current track index
1912         for (track = numtracks; ; track--) {
1913                 track_start = msf2sec(ti[track].start);
1914                 if (track_start <= cddaCurPos)
1915                         break;
1916                 if (track == 1)
1917                         break;
1918         }
1919
1920         // data tracks play silent
1921         if (ti[track].type != CDDA) {
1922                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1923                 return 0;
1924         }
1925
1926         file = 1;
1927         if (multifile) {
1928                 // find the file that contains this track
1929                 for (file = track; file > 1; file--)
1930                         if (ti[file].handle != NULL)
1931                                 break;
1932         }
1933
1934         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1935                 buffer, cddaCurPos - track_start);
1936         if (ret != CD_FRAMESIZE_RAW) {
1937                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1938                 return -1;
1939         }
1940
1941         if (cddaBigEndian) {
1942                 int i;
1943                 unsigned char tmp;
1944
1945                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1946                         tmp = buffer[i * 2];
1947                         buffer[i * 2] = buffer[i * 2 + 1];
1948                         buffer[i * 2 + 1] = tmp;
1949                 }
1950         }
1951
1952         return 0;
1953 }
1954
1955 void cdrIsoInit(void) {
1956         CDR_init = ISOinit;
1957         CDR_shutdown = ISOshutdown;
1958         CDR_open = ISOopen;
1959         CDR_close = ISOclose;
1960         CDR_getTN = ISOgetTN;
1961         CDR_getTD = ISOgetTD;
1962         CDR_readTrack = ISOreadTrack;
1963         CDR_getBuffer = ISOgetBuffer;
1964         CDR_play = ISOplay;
1965         CDR_stop = ISOstop;
1966         CDR_getBufferSub = ISOgetBufferSub;
1967         CDR_getStatus = ISOgetStatus;
1968         CDR_readCDDA = ISOreadCDDA;
1969
1970         CDR_getDriveLetter = CDR__getDriveLetter;
1971         CDR_configure = CDR__configure;
1972         CDR_test = CDR__test;
1973         CDR_about = CDR__about;
1974         CDR_setfilename = CDR__setfilename;
1975
1976         numtracks = 0;
1977 }
1978
1979 int cdrIsoActive(void) {
1980         return (cdHandle != NULL);
1981 }