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 #define usleep(x) (Sleep((x) / 1000))
  40 #else
  41 #include <pthread.h>
  42 #include <sys/time.h>
  43 #include <unistd.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 static 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 #endif
 109
 110 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
 111
 112 char* CALLBACK CDR__getDriveLetter(void);
 113 long CALLBACK CDR__configure(void);
 114 long CALLBACK CDR__test(void);
 115 void CALLBACK CDR__about(void);
 116 long CALLBACK CDR__setfilename(char *filename);
 117 long CALLBACK CDR__getStatus(struct CdrStat *stat);
 118
 119 static void DecodeRawSubData(void);
 120
 121 struct trackinfo {
 122         enum {DATA=1, CDDA} type;
 123         char start[3];          // MSF-format
 124         char length[3];         // MSF-format
 125         FILE *handle;           // for multi-track images CDDA
 126         unsigned int start_offset; // byte offset from start of above file
 127 };
 128
 129 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 130
 131 static int numtracks = 0;
 132 static struct trackinfo ti[MAXTRACKS];
 133
 134 // get a sector from a msf-array
 135 static unsigned int msf2sec(char *msf) {
 136         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 137 }
 138
 139 static void sec2msf(unsigned int s, char *msf) {
 140         msf[0] = s / 75 / 60;
 141         s = s - msf[0] * 75 * 60;
 142         msf[1] = s / 75;
 143         s = s - msf[1] * 75;
 144         msf[2] = s;
 145 }
 146
 147 // divide a string of xx:yy:zz into m, s, f
 148 static void tok2msf(char *time, char *msf) {
 149         char *token;
 150
 151         token = strtok(time, ":");
 152         if (token) {
 153                 msf[0] = atoi(token);
 154         }
 155         else {
 156                 msf[0] = 0;
 157         }
 158
 159         token = strtok(NULL, ":");
 160         if (token) {
 161                 msf[1] = atoi(token);
 162         }
 163         else {
 164                 msf[1] = 0;
 165         }
 166
 167         token = strtok(NULL, ":");
 168         if (token) {
 169                 msf[2] = atoi(token);
 170         }
 171         else {
 172                 msf[2] = 0;
 173         }
 174 }
 175
 176 #ifndef _WIN32
 177 static long GetTickCount(void) {
 178         static time_t           initial_time = 0;
 179         struct timeval          now;
 180
 181         gettimeofday(&now, NULL);
 182
 183         if (initial_time == 0) {
 184                 initial_time = now.tv_sec;
 185         }
 186
 187         return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
 188 }
 189 #endif
 190
 191 // this thread plays audio data
 192 #ifdef _WIN32
 193 static void playthread(void *param)
 194 #else
 195 static void *playthread(void *param)
 196 #endif
 197 {
 198         long osleep, d, t, i, s;
 199         unsigned char   tmp;
 200         int ret = 0, sector_offs;
 201
 202         t = GetTickCount();
 203
 204         while (playing) {
 205                 s = 0;
 206                 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
 207                         sector_offs = cdda_cur_sector - cdda_first_sector;
 208                         if (sector_offs < 0) {
 209                                 d = CD_FRAMESIZE_RAW;
 210                                 memset(sndbuffer + s, 0, d);
 211                         }
 212                         else {
 213                                 d = cdimg_read_func(cddaHandle, cdda_file_offset,
 214                                         sndbuffer + s, sector_offs);
 215                                 if (d < CD_FRAMESIZE_RAW)
 216                                         break;
 217                         }
 218
 219                         s += d;
 220                         cdda_cur_sector++;
 221                 }
 222
 223                 if (s == 0) {
 224                         playing = FALSE;
 225                         initial_offset = 0;
 226                         break;
 227                 }
 228
 229                 if (!cdr.Muted && playing) {
 230                         if (cddaBigEndian) {
 231                                 for (i = 0; i < s / 2; i++) {
 232                                         tmp = sndbuffer[i * 2];
 233                                         sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
 234                                         sndbuffer[i * 2 + 1] = tmp;
 235                                 }
 236                         }
 237
 238                         // can't do it yet due to readahead..
 239                         //cdrAttenuate((short *)sndbuffer, s / 4, 1);
 240                         do {
 241                                 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
 242                                 if (ret == 0x7761)
 243             {
 244                                         usleep(6 * 1000);
 245             }
 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          {
 257                                 usleep(10000);
 258          }
 259
 260                         now = GetTickCount();
 261                         osleep = t - now;
 262                         if (osleep <= 0) {
 263                                 osleep = 1;
 264                                 t = now;
 265                         }
 266                         else if (osleep > CDDA_FRAMETIME) {
 267                                 osleep = CDDA_FRAMETIME;
 268                                 t = now;
 269                         }
 270
 271                         usleep(osleep * 1000);
 272                         t += CDDA_FRAMETIME;
 273                 }
 274
 275         }
 276
 277 #ifdef _WIN32
 278         _endthread();
 279 #else
 280         pthread_exit(0);
 281         return NULL;
 282 #endif
 283 }
 284
 285 // stop the CDDA playback
 286 static void stopCDDA() {
 287         if (!playing) {
 288                 return;
 289         }
 290
 291         playing = FALSE;
 292 #ifdef _WIN32
 293         WaitForSingleObject(threadid, INFINITE);
 294 #else
 295         pthread_join(threadid, NULL);
 296 #endif
 297 }
 298
 299 // start the CDDA playback
 300 static void startCDDA(void) {
 301         if (playing) {
 302                 stopCDDA();
 303         }
 304
 305         playing = TRUE;
 306
 307 #ifdef _WIN32
 308         threadid = (HANDLE)_beginthread(playthread, 0, NULL);
 309 #else
 310         pthread_create(&threadid, NULL, playthread, NULL);
 311 #endif
 312 }
 313
 314 // this function tries to get the .toc file of the given .bin
 315 // the necessary data is put into the ti (trackinformation)-array
 316 static int parsetoc(const char *isofile) {
 317         char                    tocname[MAXPATHLEN];
 318         FILE                    *fi;
 319         char                    linebuf[256], tmp[256], name[256];
 320         char                    *token;
 321         char                    time[20], time2[20];
 322         unsigned int    t, sector_offs, sector_size;
 323         unsigned int    current_zero_gap = 0;
 324
 325         numtracks = 0;
 326
 327         // copy name of the iso and change extension from .bin to .toc
 328         strncpy(tocname, isofile, sizeof(tocname));
 329         tocname[MAXPATHLEN - 1] = '\0';
 330         if (strlen(tocname) >= 4) {
 331                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 332         }
 333         else {
 334                 return -1;
 335         }
 336
 337         if ((fi = fopen(tocname, "r")) == NULL) {
 338                 // try changing extension to .cue (to satisfy some stupid tutorials)
 339                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 340                 if ((fi = fopen(tocname, "r")) == NULL) {
 341                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 342                         strcpy(tocname, isofile);
 343                         t = strlen(tocname);
 344                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 345                                 tocname[t - 4] = '\0';
 346                                 if ((fi = fopen(tocname, "r")) == NULL) {
 347                                         return -1;
 348                                 }
 349                         }
 350                         else {
 351                                 return -1;
 352                         }
 353                 }
 354                 // check if it's really a TOC named as a .cue
 355                 fgets(linebuf, sizeof(linebuf), fi);
 356                 token = strtok(linebuf, " ");
 357                 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 358                         fclose(fi);
 359                         return -1;
 360                 }
 361                 fseek(fi, 0, SEEK_SET);
 362         }
 363
 364         memset(&ti, 0, sizeof(ti));
 365         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 366
 367         sector_size = CD_FRAMESIZE_RAW;
 368         sector_offs = 2 * 75;
 369
 370         // parse the .toc file
 371         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 372                 // search for tracks
 373                 strncpy(tmp, linebuf, sizeof(linebuf));
 374                 token = strtok(tmp, " ");
 375
 376                 if (token == NULL) continue;
 377
 378                 if (!strcmp(token, "TRACK")) {
 379                         sector_offs += current_zero_gap;
 380                         current_zero_gap = 0;
 381
 382                         // get type of track
 383                         token = strtok(NULL, " ");
 384                         numtracks++;
 385
 386                         if (!strncmp(token, "MODE2_RAW", 9)) {
 387                                 ti[numtracks].type = DATA;
 388                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 389
 390                                 // check if this image contains mixed subchannel data
 391                                 token = strtok(NULL, " ");
 392                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 393                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 394                                         subChanMixed = TRUE;
 395                                         if (!strncmp(token, "RW_RAW", 6))
 396                                                 subChanRaw = TRUE;
 397                                 }
 398                         }
 399                         else if (!strncmp(token, "AUDIO", 5)) {
 400                                 ti[numtracks].type = CDDA;
 401                         }
 402                 }
 403                 else if (!strcmp(token, "DATAFILE")) {
 404                         if (ti[numtracks].type == CDDA) {
 405                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 406                                 ti[numtracks].start_offset = t;
 407                                 t = t / sector_size + sector_offs;
 408                                 sec2msf(t, (char *)&ti[numtracks].start);
 409                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 410                         }
 411                         else {
 412                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 413                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 414                         }
 415                 }
 416                 else if (!strcmp(token, "FILE")) {
 417                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 418                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 419                         t += msf2sec(ti[numtracks].start) * sector_size;
 420                         ti[numtracks].start_offset = t;
 421                         t = t / sector_size + sector_offs;
 422                         sec2msf(t, (char *)&ti[numtracks].start);
 423                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 424                 }
 425                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 426                         // skip unneeded optional fields
 427                         while (token != NULL) {
 428                                 token = strtok(NULL, " ");
 429                                 if (strchr(token, ':') != NULL)
 430                                         break;
 431                         }
 432                         if (token != NULL) {
 433                                 tok2msf(token, tmp);
 434                                 current_zero_gap = msf2sec(tmp);
 435                         }
 436                         if (numtracks > 1) {
 437                                 t = ti[numtracks - 1].start_offset;
 438                                 t /= sector_size;
 439                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 440                         }
 441                 }
 442                 else if (!strcmp(token, "START")) {
 443                         token = strtok(NULL, " ");
 444                         if (token != NULL && strchr(token, ':')) {
 445                                 tok2msf(token, tmp);
 446                                 t = msf2sec(tmp);
 447                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 448                                 t = msf2sec(ti[numtracks].start) + t;
 449                                 sec2msf(t, (char *)&ti[numtracks].start);
 450                         }
 451                 }
 452         }
 453
 454         fclose(fi);
 455
 456         return 0;
 457 }
 458
 459 // this function tries to get the .cue file of the given .bin
 460 // the necessary data is put into the ti (trackinformation)-array
 461 static int parsecue(const char *isofile) {
 462         char                    cuename[MAXPATHLEN];
 463         char                    filepath[MAXPATHLEN];
 464         char                    *incue_fname;
 465         FILE                    *fi;
 466         char                    *token;
 467         char                    time[20];
 468         char                    *tmp;
 469         char                    linebuf[256], tmpb[256], dummy[256];
 470         unsigned int    incue_max_len;
 471         unsigned int    t, file_len, mode, sector_offs;
 472         unsigned int    sector_size = 2352;
 473
 474         numtracks = 0;
 475
 476         // copy name of the iso and change extension from .bin to .cue
 477         strncpy(cuename, isofile, sizeof(cuename));
 478         cuename[MAXPATHLEN - 1] = '\0';
 479         if (strlen(cuename) >= 4) {
 480                 strcpy(cuename + strlen(cuename) - 4, ".cue");
 481         }
 482         else {
 483                 return -1;
 484         }
 485
 486         if ((fi = fopen(cuename, "r")) == NULL) {
 487                 return -1;
 488         }
 489
 490         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 491         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 492         // that...
 493         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 494                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 495                         // Don't proceed further, as this is actually a .toc file rather
 496                         // than a .cue file.
 497                         fclose(fi);
 498                         return parsetoc(isofile);
 499                 }
 500                 fseek(fi, 0, SEEK_SET);
 501         }
 502
 503         // build a path for files referenced in .cue
 504         strncpy(filepath, cuename, sizeof(filepath));
 505         tmp = strrchr(filepath, '/');
 506         if (tmp == NULL)
 507                 tmp = strrchr(filepath, '\\');
 508         if (tmp != NULL)
 509                 tmp++;
 510         else
 511                 tmp = filepath;
 512         *tmp = 0;
 513         filepath[sizeof(filepath) - 1] = 0;
 514         incue_fname = tmp;
 515         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 516
 517         memset(&ti, 0, sizeof(ti));
 518
 519         file_len = 0;
 520         sector_offs = 2 * 75;
 521
 522         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 523                 strncpy(dummy, linebuf, sizeof(linebuf));
 524                 token = strtok(dummy, " ");
 525
 526                 if (token == NULL) {
 527                         continue;
 528                 }
 529
 530                 if (!strcmp(token, "TRACK")) {
 531                         numtracks++;
 532
 533                         sector_size = 0;
 534                         if (strstr(linebuf, "AUDIO") != NULL) {
 535                                 ti[numtracks].type = CDDA;
 536                                 sector_size = 2352;
 537                         }
 538                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 539                                 ti[numtracks].type = DATA;
 540                         else {
 541                                 SysPrintf(".cue: failed to parse TRACK\n");
 542                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 543                         }
 544                         if (sector_size == 0)
 545                                 sector_size = 2352;
 546                 }
 547                 else if (!strcmp(token, "INDEX")) {
 548                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 549                                 SysPrintf(".cue: failed to parse INDEX\n");
 550                         tok2msf(time, (char *)&ti[numtracks].start);
 551
 552                         t = msf2sec(ti[numtracks].start);
 553                         ti[numtracks].start_offset = t * sector_size;
 554                         t += sector_offs;
 555                         sec2msf(t, ti[numtracks].start);
 556
 557                         // default track length to file length
 558                         t = file_len - ti[numtracks].start_offset / sector_size;
 559                         sec2msf(t, ti[numtracks].length);
 560
 561                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 562                                 // this track uses the same file as the last,
 563                                 // start of this track is last track's end
 564                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 565                                 sec2msf(t, ti[numtracks - 1].length);
 566                         }
 567                         if (numtracks > 1 && pregapOffset == -1)
 568                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 569                 }
 570                 else if (!strcmp(token, "PREGAP")) {
 571                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 572                                 tok2msf(time, dummy);
 573                                 sector_offs += msf2sec(dummy);
 574                         }
 575                         pregapOffset = -1; // mark to fill track start_offset
 576                 }
 577                 else if (!strcmp(token, "FILE")) {
 578                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 579                         if (t != 1)
 580                                 sscanf(linebuf, " FILE %255s", tmpb);
 581
 582                         tmp = strrchr(tmpb, '\\');
 583                         if (tmp == NULL)
 584                                 tmp = strrchr(tmpb, '/');
 585                         if (tmp != NULL)
 586                                 tmp++;
 587                         else
 588                                 tmp = tmpb;
 589                         strncpy(incue_fname, tmp, incue_max_len);
 590                         ti[numtracks + 1].handle = fopen(filepath, "rb");
 591
 592                         // update global offset if this is not first file in this .cue
 593                         if (numtracks + 1 > 1) {
 594                                 multifile = 1;
 595                                 sector_offs += file_len;
 596                         }
 597
 598                         file_len = 0;
 599                         if (ti[numtracks + 1].handle == NULL) {
 600                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 601                                 continue;
 602                         }
 603                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 604                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 605
 606                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 607                                 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
 608                         {
 609                                 // user selected .cue as image file, use it's data track instead
 610                                 fclose(cdHandle);
 611                                 cdHandle = fopen(filepath, "rb");
 612                         }
 613                 }
 614         }
 615
 616         fclose(fi);
 617
 618         return 0;
 619 }
 620
 621 // this function tries to get the .ccd file of the given .img
 622 // the necessary data is put into the ti (trackinformation)-array
 623 static int parseccd(const char *isofile) {
 624         char                    ccdname[MAXPATHLEN];
 625         FILE                    *fi;
 626         char                    linebuf[256];
 627         unsigned int    t;
 628
 629         numtracks = 0;
 630
 631         // copy name of the iso and change extension from .img to .ccd
 632         strncpy(ccdname, isofile, sizeof(ccdname));
 633         ccdname[MAXPATHLEN - 1] = '\0';
 634         if (strlen(ccdname) >= 4) {
 635                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 636         }
 637         else {
 638                 return -1;
 639         }
 640
 641         if ((fi = fopen(ccdname, "r")) == NULL) {
 642                 return -1;
 643         }
 644
 645         memset(&ti, 0, sizeof(ti));
 646
 647         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 648                 if (!strncmp(linebuf, "[TRACK", 6)){
 649                         numtracks++;
 650                 }
 651                 else if (!strncmp(linebuf, "MODE=", 5)) {
 652                         sscanf(linebuf, "MODE=%d", &t);
 653                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 654                 }
 655                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 656                         sscanf(linebuf, "INDEX 1=%d", &t);
 657                         sec2msf(t + 2 * 75, ti[numtracks].start);
 658                         ti[numtracks].start_offset = t * 2352;
 659
 660                         // If we've already seen another track, this is its end
 661                         if (numtracks > 1) {
 662                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 663                                 sec2msf(t, ti[numtracks - 1].length);
 664                         }
 665                 }
 666         }
 667
 668         fclose(fi);
 669
 670         // Fill out the last track's end based on size
 671         if (numtracks >= 1) {
 672                 fseek(cdHandle, 0, SEEK_END);
 673                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 674                 sec2msf(t, ti[numtracks].length);
 675         }
 676
 677         return 0;
 678 }
 679
 680 // this function tries to get the .mds file of the given .mdf
 681 // the necessary data is put into the ti (trackinformation)-array
 682 static int parsemds(const char *isofile) {
 683         char                    mdsname[MAXPATHLEN];
 684         FILE                    *fi;
 685         unsigned int    offset, extra_offset, l, i;
 686         unsigned short  s;
 687
 688         numtracks = 0;
 689
 690         // copy name of the iso and change extension from .mdf to .mds
 691         strncpy(mdsname, isofile, sizeof(mdsname));
 692         mdsname[MAXPATHLEN - 1] = '\0';
 693         if (strlen(mdsname) >= 4) {
 694                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 695         }
 696         else {
 697                 return -1;
 698         }
 699
 700         if ((fi = fopen(mdsname, "rb")) == NULL) {
 701                 return -1;
 702         }
 703
 704         memset(&ti, 0, sizeof(ti));
 705
 706         // check if it's a valid mds file
 707         fread(&i, 1, sizeof(unsigned int), fi);
 708         i = SWAP32(i);
 709         if (i != 0x4944454D) {
 710                 // not an valid mds file
 711                 fclose(fi);
 712                 return -1;
 713         }
 714
 715         // get offset to session block
 716         fseek(fi, 0x50, SEEK_SET);
 717         fread(&offset, 1, sizeof(unsigned int), fi);
 718         offset = SWAP32(offset);
 719
 720         // get total number of tracks
 721         offset += 14;
 722         fseek(fi, offset, SEEK_SET);
 723         fread(&s, 1, sizeof(unsigned short), fi);
 724         s = SWAP16(s);
 725         numtracks = s;
 726
 727         // get offset to track blocks
 728         fseek(fi, 4, SEEK_CUR);
 729         fread(&offset, 1, sizeof(unsigned int), fi);
 730         offset = SWAP32(offset);
 731
 732         // skip lead-in data
 733         while (1) {
 734                 fseek(fi, offset + 4, SEEK_SET);
 735                 if (fgetc(fi) < 0xA0) {
 736                         break;
 737                 }
 738                 offset += 0x50;
 739         }
 740
 741         // check if the image contains mixed subchannel data
 742         fseek(fi, offset + 1, SEEK_SET);
 743         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 744
 745         // read track data
 746         for (i = 1; i <= numtracks; i++) {
 747                 fseek(fi, offset, SEEK_SET);
 748
 749                 // get the track type
 750                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 751                 fseek(fi, 8, SEEK_CUR);
 752
 753                 // get the track starting point
 754                 ti[i].start[0] = fgetc(fi);
 755                 ti[i].start[1] = fgetc(fi);
 756                 ti[i].start[2] = fgetc(fi);
 757
 758                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 759                 extra_offset = SWAP32(extra_offset);
 760
 761                 // get track start offset (in .mdf)
 762                 fseek(fi, offset + 0x28, SEEK_SET);
 763                 fread(&l, 1, sizeof(unsigned int), fi);
 764                 l = SWAP32(l);
 765                 ti[i].start_offset = l;
 766
 767                 // get pregap
 768                 fseek(fi, extra_offset, SEEK_SET);
 769                 fread(&l, 1, sizeof(unsigned int), fi);
 770                 l = SWAP32(l);
 771                 if (l != 0 && i > 1)
 772                         pregapOffset = msf2sec(ti[i].start);
 773
 774                 // get the track length
 775                 fread(&l, 1, sizeof(unsigned int), fi);
 776                 l = SWAP32(l);
 777                 sec2msf(l, ti[i].length);
 778
 779                 offset += 0x50;
 780         }
 781
 782         fclose(fi);
 783         return 0;
 784 }
 785
 786 static int handlepbp(const char *isofile) {
 787         struct {
 788                 unsigned int sig;
 789                 unsigned int dontcare[8];
 790                 unsigned int psar_offs;
 791         } pbp_hdr;
 792         struct {
 793                 unsigned char type;
 794                 unsigned char pad0;
 795                 unsigned char track;
 796                 char index0[3];
 797                 char pad1;
 798                 char index1[3];
 799         } toc_entry;
 800         struct {
 801                 unsigned int offset;
 802                 unsigned int size;
 803                 unsigned int dontcare[6];
 804         } index_entry;
 805         char psar_sig[11];
 806         off_t psisoimg_offs, cdimg_base;
 807         unsigned int t, cd_length;
 808         unsigned int offsettab[8];
 809         const char *ext = NULL;
 810         int i, ret;
 811
 812         if (strlen(isofile) >= 4)
 813                 ext = isofile + strlen(isofile) - 4;
 814         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 815                 return -1;
 816
 817         fseeko(cdHandle, 0, SEEK_SET);
 818
 819         numtracks = 0;
 820
 821         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 822         if (ret != sizeof(pbp_hdr)) {
 823                 SysPrintf("failed to read pbp\n");
 824                 goto fail_io;
 825         }
 826
 827         ret = fseeko(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 828         if (ret != 0) {
 829                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 830                 goto fail_io;
 831         }
 832
 833         psisoimg_offs = pbp_hdr.psar_offs;
 834         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 835         psar_sig[10] = 0;
 836         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 837                 // multidisk image?
 838                 ret = fseeko(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 839                 if (ret != 0) {
 840                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 841                         goto fail_io;
 842                 }
 843
 844                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 845                         SysPrintf("failed to read offsettab\n");
 846                         goto fail_io;
 847                 }
 848
 849                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 850                         if (offsettab[i] == 0)
 851                                 break;
 852                 }
 853                 cdrIsoMultidiskCount = i;
 854                 if (cdrIsoMultidiskCount == 0) {
 855                         SysPrintf("multidisk eboot has 0 images?\n");
 856                         goto fail_io;
 857                 }
 858
 859                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 860                         cdrIsoMultidiskSelect = 0;
 861
 862                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 863
 864                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 865                 if (ret != 0) {
 866                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 867                         goto fail_io;
 868                 }
 869
 870                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 871                 psar_sig[10] = 0;
 872         }
 873
 874         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 875                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 876                 goto fail_io;
 877         }
 878
 879         // seek to TOC
 880         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 881         if (ret != 0) {
 882                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 883                 goto fail_io;
 884         }
 885
 886         // first 3 entries are special
 887         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 888         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 889         numtracks = btoi(toc_entry.index1[0]);
 890
 891         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 892         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 893                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 894
 895         for (i = 1; i <= numtracks; i++) {
 896                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 897
 898                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 899
 900                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 901                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 902                 ti[i].start_offset *= 2352;
 903                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 904                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 905                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 906
 907                 if (i > 1) {
 908                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 909                         sec2msf(t, ti[i - 1].length);
 910                 }
 911         }
 912         t = cd_length - ti[numtracks].start_offset / 2352;
 913         sec2msf(t, ti[numtracks].length);
 914
 915         // seek to ISO index
 916         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 917         if (ret != 0) {
 918                 SysPrintf("failed to seek to ISO index\n");
 919                 goto fail_io;
 920         }
 921
 922         compr_img = calloc(1, sizeof(*compr_img));
 923         if (compr_img == NULL)
 924                 goto fail_io;
 925
 926         compr_img->block_shift = 4;
 927         compr_img->current_block = (unsigned int)-1;
 928
 929         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 930         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 931         if (compr_img->index_table == NULL)
 932                 goto fail_io;
 933
 934         cdimg_base = psisoimg_offs + 0x100000;
 935         for (i = 0; i < compr_img->index_len; i++) {
 936                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 937                 if (ret != sizeof(index_entry)) {
 938                         SysPrintf("failed to read index_entry #%d\n", i);
 939                         goto fail_index;
 940                 }
 941
 942                 if (index_entry.size == 0)
 943                         break;
 944
 945                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 946         }
 947         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 948
 949         return 0;
 950
 951 fail_index:
 952         free(compr_img->index_table);
 953         compr_img->index_table = NULL;
 954 fail_io:
 955         if (compr_img != NULL) {
 956                 free(compr_img);
 957                 compr_img = NULL;
 958         }
 959         return -1;
 960 }
 961
 962 static int handlecbin(const char *isofile) {
 963         struct
 964         {
 965                 char magic[4];
 966                 unsigned int header_size;
 967                 unsigned long long total_bytes;
 968                 unsigned int block_size;
 969                 unsigned char ver;              // 1
 970                 unsigned char align;
 971                 unsigned char rsv_06[2];
 972         } ciso_hdr;
 973         const char *ext = NULL;
 974         unsigned int *index_table = NULL;
 975         unsigned int index = 0, plain;
 976         int i, ret;
 977
 978         if (strlen(isofile) >= 5)
 979                 ext = isofile + strlen(isofile) - 5;
 980         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 981                 return -1;
 982
 983         fseek(cdHandle, 0, SEEK_SET);
 984
 985         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 986         if (ret != sizeof(ciso_hdr)) {
 987                 SysPrintf("failed to read ciso header\n");
 988                 return -1;
 989         }
 990
 991         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
 992                 SysPrintf("bad ciso header\n");
 993                 return -1;
 994         }
 995         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
 996                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
 997                 if (ret != 0) {
 998                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
 999                         return -1;
1000                 }
1001         }
1002
1003         compr_img = calloc(1, sizeof(*compr_img));
1004         if (compr_img == NULL)
1005                 goto fail_io;
1006
1007         compr_img->block_shift = 0;
1008         compr_img->current_block = (unsigned int)-1;
1009
1010         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
1011         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
1012         if (index_table == NULL)
1013                 goto fail_io;
1014
1015         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
1016         if (ret != compr_img->index_len) {
1017                 SysPrintf("failed to read index table\n");
1018                 goto fail_index;
1019         }
1020
1021         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
1022         if (compr_img->index_table == NULL)
1023                 goto fail_index;
1024
1025         for (i = 0; i < compr_img->index_len + 1; i++) {
1026                 index = index_table[i];
1027                 plain = index & 0x80000000;
1028                 index &= 0x7fffffff;
1029                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
1030                 if (plain)
1031                         compr_img->index_table[i] |= OFF_T_MSB;
1032         }
1033
1034         return 0;
1035
1036 fail_index:
1037         free(index_table);
1038 fail_io:
1039         if (compr_img != NULL) {
1040                 free(compr_img);
1041                 compr_img = NULL;
1042         }
1043         return -1;
1044 }
1045
1046 #ifdef HAVE_CHD
1047 static int handlechd(const char *isofile) {
1048         chd_img = calloc(1, sizeof(*chd_img));
1049         if (chd_img == NULL)
1050                 goto fail_io;
1051
1052         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
1053       goto fail_io;
1054
1055    chd_img->header = chd_get_header(chd_img->chd);
1056
1057    chd_img->buffer = malloc(chd_img->header->hunkbytes);
1058    if (chd_img->buffer == NULL)
1059                 goto fail_io;
1060
1061    chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
1062    chd_img->current_hunk = (unsigned int)-1;
1063
1064    cddaBigEndian = TRUE;
1065
1066         numtracks = 0;
1067         int frame_offset = 150;
1068         memset(ti, 0, sizeof(ti));
1069
1070    while (1)
1071    {
1072       struct {
1073          char type[64];
1074          char subtype[32];
1075          char pgtype[32];
1076          char pgsub[32];
1077          uint32_t track;
1078          uint32_t frames;
1079          uint32_t pregap;
1080          uint32_t postgap;
1081       } md = {};
1082       char meta[256];
1083       uint32_t meta_size = 0;
1084
1085       if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
1086          sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
1087       else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
1088          sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
1089       else
1090          break;
1091
1092                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
1093
1094       sec2msf(frame_offset + md.pregap, ti[md.track].start);
1095       sec2msf(md.frames - md.pregap, ti[md.track].length);
1096
1097       if (!strcmp(md.type, md.pgtype))
1098          frame_offset += md.pregap;
1099
1100       ti[md.track].start_offset = frame_offset * CD_FRAMESIZE_RAW;
1101
1102                 frame_offset += md.frames;
1103                 frame_offset += md.postgap;
1104                 numtracks++;
1105         }
1106
1107         if (numtracks)
1108                 return 0;
1109
1110 fail_io:
1111         if (chd_img != NULL) {
1112                 free(chd_img->buffer);
1113                 free(chd_img);
1114                 chd_img = NULL;
1115         }
1116         return -1;
1117 }
1118 #endif
1119
1120 // this function tries to get the .sub file of the given .img
1121 static int opensubfile(const char *isoname) {
1122         char            subname[MAXPATHLEN];
1123
1124         // copy name of the iso and change extension from .img to .sub
1125         strncpy(subname, isoname, sizeof(subname));
1126         subname[MAXPATHLEN - 1] = '\0';
1127         if (strlen(subname) >= 4) {
1128                 strcpy(subname + strlen(subname) - 4, ".sub");
1129         }
1130         else {
1131                 return -1;
1132         }
1133
1134         subHandle = fopen(subname, "rb");
1135         if (subHandle == NULL) {
1136                 return -1;
1137         }
1138
1139         return 0;
1140 }
1141
1142 static int opensbifile(const char *isoname) {
1143         char            sbiname[MAXPATHLEN], disknum[MAXPATHLEN] = "0";
1144         int             s;
1145
1146         strncpy(sbiname, isoname, sizeof(sbiname));
1147         sbiname[MAXPATHLEN - 1] = '\0';
1148         if (strlen(sbiname) >= 4) {
1149                 if (cdrIsoMultidiskCount > 1) {
1150                         sprintf(disknum, "_%i.sbi", cdrIsoMultidiskSelect + 1);
1151                         strcpy(sbiname + strlen(sbiname) - 4, disknum);
1152                 }
1153                 else
1154                         strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1155         }
1156         else {
1157                 return -1;
1158         }
1159
1160         fseek(cdHandle, 0, SEEK_END);
1161         s = ftell(cdHandle) / 2352;
1162
1163         return LoadSBI(sbiname, s);
1164 }
1165
1166 #ifdef _WIN32
1167 static void readThreadStop() {}
1168 static void readThreadStart() {}
1169 #else
1170 static pthread_t read_thread_id;
1171
1172 static pthread_cond_t read_thread_msg_avail;
1173 static pthread_cond_t read_thread_msg_done;
1174 static pthread_mutex_t read_thread_msg_lock;
1175
1176 static pthread_cond_t sectorbuffer_cond;
1177 static pthread_mutex_t sectorbuffer_lock;
1178
1179 static boolean read_thread_running = FALSE;
1180 static int read_thread_sector_start = -1;
1181 static int read_thread_sector_end = -1;
1182
1183 typedef struct {
1184   int sector;
1185   long ret;
1186   unsigned char data[CD_FRAMESIZE_RAW];
1187 } SectorBufferEntry;
1188
1189 #define SECTOR_BUFFER_SIZE 4096
1190
1191 static SectorBufferEntry *sectorbuffer;
1192 static size_t sectorbuffer_index;
1193
1194 int (*sync_cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
1195 unsigned char *(*sync_CDR_getBuffer)(void);
1196
1197 static unsigned char * CALLBACK ISOgetBuffer_async(void);
1198 static int cdread_async(FILE *f, unsigned int base, void *dest, int sector);
1199
1200 static void *readThreadMain(void *param) {
1201   int max_sector = -1;
1202   int requested_sector_start = -1;
1203   int requested_sector_end = -1;
1204   int last_read_sector = -1;
1205   int index = 0;
1206
1207   int ra_sector = -1;
1208   int max_ra = 128;
1209   int initial_ra = 1;
1210   int speedmult_ra = 4;
1211
1212   int ra_count = 0;
1213   int how_far_ahead = 0;
1214
1215   unsigned char tmpdata[CD_FRAMESIZE_RAW];
1216   long ret;
1217
1218   max_sector = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1219
1220   while(1) {
1221     pthread_mutex_lock(&read_thread_msg_lock);
1222
1223     // If we don't have readahead and we don't have a sector request, wait for one.
1224     // If we still have readahead to go, don't block, just keep going.
1225     // And if we ever have a sector request pending, acknowledge and reset it.
1226
1227     if (!ra_count) {
1228       if (read_thread_sector_start == -1 && read_thread_running) {
1229         pthread_cond_wait(&read_thread_msg_avail, &read_thread_msg_lock);
1230       }
1231     }
1232
1233     if (read_thread_sector_start != -1) {
1234       requested_sector_start = read_thread_sector_start;
1235       requested_sector_end = read_thread_sector_end;
1236       read_thread_sector_start = -1;
1237       read_thread_sector_end = -1;
1238       pthread_cond_signal(&read_thread_msg_done);
1239     }
1240
1241     pthread_mutex_unlock(&read_thread_msg_lock);
1242
1243     if (!read_thread_running)
1244       break;
1245
1246     // Readahead code, based on the implementation in mednafen psx's cdromif.cpp
1247     if (requested_sector_start != -1) {
1248       if (last_read_sector != -1 && last_read_sector == (requested_sector_start - 1)) {
1249         how_far_ahead = ra_sector - requested_sector_end;
1250
1251         if(how_far_ahead <= max_ra)
1252           ra_count = (max_ra - how_far_ahead + 1 ? max_ra - how_far_ahead + 1 : speedmult_ra);
1253         else
1254           ra_count++;
1255       } else if (requested_sector_end != last_read_sector) {
1256         ra_sector = requested_sector_end;
1257         ra_count = initial_ra;
1258       }
1259
1260       last_read_sector = requested_sector_end;
1261     }
1262
1263     // check for end of CD
1264     if (ra_count && ra_sector >= max_sector) {
1265       ra_count = 0;
1266     }
1267
1268     if (ra_count) {
1269
1270       index = ra_sector % SECTOR_BUFFER_SIZE;
1271       pthread_mutex_lock(&sectorbuffer_lock);
1272       if (sectorbuffer[index].sector != ra_sector) {
1273         pthread_mutex_unlock(&sectorbuffer_lock);
1274
1275         ret = sync_cdimg_read_func(cdHandle, 0, tmpdata, ra_sector);
1276
1277         pthread_mutex_lock(&sectorbuffer_lock);
1278         sectorbuffer[index].ret = ret;
1279         sectorbuffer[index].sector = ra_sector;
1280         memcpy(sectorbuffer[index].data, tmpdata, CD_FRAMESIZE_RAW);
1281       }
1282       pthread_cond_signal(&sectorbuffer_cond);
1283       pthread_mutex_unlock(&sectorbuffer_lock);
1284
1285       ra_sector++;
1286       ra_count--;
1287     }
1288   }
1289
1290   return NULL;
1291 }
1292
1293 static void readThreadStop() {
1294   if (read_thread_running == TRUE) {
1295     read_thread_running = FALSE;
1296     pthread_cond_signal(&read_thread_msg_avail);
1297     pthread_join(read_thread_id, NULL);
1298   }
1299
1300   pthread_cond_destroy(&read_thread_msg_done);
1301   pthread_cond_destroy(&read_thread_msg_avail);
1302   pthread_mutex_destroy(&read_thread_msg_lock);
1303
1304   pthread_cond_destroy(&sectorbuffer_cond);
1305   pthread_mutex_destroy(&sectorbuffer_lock);
1306
1307   CDR_getBuffer = sync_CDR_getBuffer;
1308   cdimg_read_func = sync_cdimg_read_func;
1309
1310   free(sectorbuffer);
1311   sectorbuffer = NULL;
1312 }
1313
1314 static void readThreadStart() {
1315   SysPrintf("Starting async CD thread\n");
1316
1317   if (read_thread_running == TRUE)
1318     return;
1319
1320   read_thread_running = TRUE;
1321   read_thread_sector_start = -1;
1322   read_thread_sector_end = -1;
1323   sectorbuffer_index = 0;
1324
1325   sectorbuffer = calloc(SECTOR_BUFFER_SIZE, sizeof(SectorBufferEntry));
1326   if(!sectorbuffer)
1327     goto error;
1328
1329   sectorbuffer[0].sector = -1; // Otherwise we might think we've already fetched sector 0!
1330
1331   sync_CDR_getBuffer = CDR_getBuffer;
1332   CDR_getBuffer = ISOgetBuffer_async;
1333   sync_cdimg_read_func = cdimg_read_func;
1334   cdimg_read_func = cdread_async;
1335
1336   if (pthread_cond_init(&read_thread_msg_avail, NULL) ||
1337       pthread_cond_init(&read_thread_msg_done, NULL) ||
1338       pthread_mutex_init(&read_thread_msg_lock, NULL) ||
1339       pthread_cond_init(&sectorbuffer_cond, NULL) ||
1340       pthread_mutex_init(&sectorbuffer_lock, NULL) ||
1341       pthread_create(&read_thread_id, NULL, readThreadMain, NULL))
1342     goto error;
1343
1344   return;
1345
1346  error:
1347   SysPrintf("Error starting async CD thread\n");
1348   SysPrintf("Falling back to sync\n");
1349
1350   readThreadStop();
1351 }
1352 #endif
1353
1354 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1355 {
1356         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1357         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1358 }
1359
1360 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1361 {
1362         int ret;
1363
1364         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1365         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1366         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1367
1368         if (subChanRaw) DecodeRawSubData();
1369
1370         return ret;
1371 }
1372
1373 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1374 {
1375         static z_stream z;
1376         int ret = 0;
1377
1378         if (z.zalloc == NULL) {
1379                 // XXX: one-time leak here..
1380                 z.next_in = Z_NULL;
1381                 z.avail_in = 0;
1382                 z.zalloc = Z_NULL;
1383                 z.zfree = Z_NULL;
1384                 z.opaque = Z_NULL;
1385                 ret = inflateInit2(&z, -15);
1386         }
1387         else
1388                 ret = inflateReset(&z);
1389         if (ret != Z_OK)
1390                 return ret;
1391
1392         z.next_in = in;
1393         z.avail_in = in_size;
1394         z.next_out = out;
1395         z.avail_out = *out_size;
1396
1397         ret = inflate(&z, Z_NO_FLUSH);
1398         //inflateEnd(&z);
1399
1400         *out_size -= z.avail_out;
1401         return ret == 1 ? 0 : ret;
1402 }
1403
1404 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1405 {
1406         unsigned long cdbuffer_size, cdbuffer_size_expect;
1407         unsigned int size;
1408         int is_compressed;
1409         off_t start_byte;
1410         int ret, block;
1411
1412         if (base)
1413                 sector += base / 2352;
1414
1415         block = sector >> compr_img->block_shift;
1416         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1417
1418         if (block == compr_img->current_block) {
1419                 //printf("hit sect %d\n", sector);
1420                 goto finish;
1421         }
1422
1423         if (sector >= compr_img->index_len * 16) {
1424                 SysPrintf("sector %d is past img end\n", sector);
1425                 return -1;
1426         }
1427
1428         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1429         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1430                 SysPrintf("seek error for block %d at %llx: ",
1431                         block, (long long)start_byte);
1432                 perror(NULL);
1433                 return -1;
1434         }
1435
1436         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1437         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1438         if (size > sizeof(compr_img->buff_compressed)) {
1439                 SysPrintf("block %d is too large: %u\n", block, size);
1440                 return -1;
1441         }
1442
1443         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1444                                 1, size, cdHandle) != size) {
1445                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1446                 perror(NULL);
1447                 return -1;
1448         }
1449
1450         if (is_compressed) {
1451                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1452                 cdbuffer_size = cdbuffer_size_expect;
1453                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1454                 if (ret != 0) {
1455                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1456                                         ret, block, sector);
1457                         return -1;
1458                 }
1459                 if (cdbuffer_size != cdbuffer_size_expect)
1460                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1461                                         cdbuffer_size_expect, sector);
1462         }
1463
1464         // done at last!
1465         compr_img->current_block = block;
1466
1467 finish:
1468         if (dest != cdbuffer) // copy avoid HACK
1469                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1470                         CD_FRAMESIZE_RAW);
1471         return CD_FRAMESIZE_RAW;
1472 }
1473
1474 #ifdef HAVE_CHD
1475 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1476 {
1477         int hunk;
1478
1479         if (base)
1480                 sector += base / CD_FRAMESIZE_RAW;
1481
1482         hunk = sector / chd_img->sectors_per_hunk;
1483         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1484
1485         if (hunk == chd_img->current_hunk)
1486                 goto finish;
1487
1488         chd_read(chd_img->chd, hunk, chd_img->buffer);
1489
1490         chd_img->current_hunk = hunk;
1491
1492 finish:
1493         if (dest != cdbuffer) // copy avoid HACK
1494                 memcpy(dest, chd_img->buffer[chd_img->sector_in_hunk],
1495                         CD_FRAMESIZE_RAW);
1496         return CD_FRAMESIZE_RAW;
1497 }
1498 #endif
1499 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1500 {
1501         int ret;
1502
1503         fseek(f, base + sector * 2048, SEEK_SET);
1504         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1505
1506         // not really necessary, fake mode 2 header
1507         memset(cdbuffer, 0, 12 * 2);
1508         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1509         cdbuffer[12 + 3] = 1;
1510
1511         return ret;
1512 }
1513
1514 #ifndef _WIN32
1515
1516 static int cdread_async(FILE *f, unsigned int base, void *dest, int sector) {
1517   boolean found = FALSE;
1518   int i = sector % SECTOR_BUFFER_SIZE;
1519   long ret;
1520
1521   if (f != cdHandle || base != 0 || dest != cdbuffer) {
1522     // Async reads are only supported for cdbuffer, so call the sync
1523     // function directly.
1524     return sync_cdimg_read_func(f, base, dest, sector);
1525   }
1526
1527   pthread_mutex_lock(&read_thread_msg_lock);
1528
1529   // Only wait if we're not trying to read the next sector and
1530   // sector_start is set (meaning the last request hasn't been
1531   // processed yet)
1532   while(read_thread_sector_start != -1 && read_thread_sector_end + 1 != sector) {
1533     pthread_cond_wait(&read_thread_msg_done, &read_thread_msg_lock);
1534   }
1535
1536   if (read_thread_sector_start == -1)
1537     read_thread_sector_start = sector;
1538
1539   read_thread_sector_end = sector;
1540   pthread_cond_signal(&read_thread_msg_avail);
1541   pthread_mutex_unlock(&read_thread_msg_lock);
1542
1543   do {
1544     pthread_mutex_lock(&sectorbuffer_lock);
1545     if (sectorbuffer[i].sector == sector) {
1546       sectorbuffer_index = i;
1547       ret = sectorbuffer[i].ret;
1548       found = TRUE;
1549     }
1550
1551     if (!found) {
1552       pthread_cond_wait(&sectorbuffer_cond, &sectorbuffer_lock);
1553     }
1554     pthread_mutex_unlock(&sectorbuffer_lock);
1555   } while (!found);
1556
1557   return ret;
1558 }
1559
1560 #endif
1561
1562 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1563         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1564 }
1565
1566 #ifdef HAVE_CHD
1567 static unsigned char * CALLBACK ISOgetBuffer_chd(void) {
1568         return chd_img->buffer[chd_img->sector_in_hunk] + 12;
1569 }
1570 #endif
1571
1572 #ifndef _WIN32
1573 static unsigned char * CALLBACK ISOgetBuffer_async(void) {
1574   unsigned char *buffer;
1575   pthread_mutex_lock(&sectorbuffer_lock);
1576   buffer = sectorbuffer[sectorbuffer_index].data;
1577   pthread_mutex_unlock(&sectorbuffer_lock);
1578   return buffer + 12;
1579 }
1580
1581 #endif
1582
1583 static unsigned char * CALLBACK ISOgetBuffer(void) {
1584         return cdbuffer + 12;
1585 }
1586
1587 static void PrintTracks(void) {
1588         int i;
1589
1590         for (i = 1; i <= numtracks; i++) {
1591                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1592                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1593                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1594                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1595         }
1596 }
1597
1598 // This function is invoked by the front-end when opening an ISO
1599 // file for playback
1600 static long CALLBACK ISOopen(void) {
1601         boolean isMode1ISO = FALSE;
1602         char alt_bin_filename[MAXPATHLEN];
1603         const char *bin_filename;
1604         char image_str[1024] = {0};
1605
1606         if (cdHandle != NULL) {
1607                 return 0; // it's already open
1608         }
1609
1610         cdHandle = fopen(GetIsoFile(), "rb");
1611         if (cdHandle == NULL) {
1612                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1613                         GetIsoFile(), strerror(errno));
1614                 return -1;
1615         }
1616
1617         sprintf(image_str, "Loaded CD Image: %s", GetIsoFile());
1618
1619         cddaBigEndian = FALSE;
1620         subChanMixed = FALSE;
1621         subChanRaw = FALSE;
1622         pregapOffset = 0;
1623         cdrIsoMultidiskCount = 1;
1624         multifile = 0;
1625
1626         CDR_getBuffer = ISOgetBuffer;
1627         cdimg_read_func = cdread_normal;
1628
1629         if (parsetoc(GetIsoFile()) == 0) {
1630                 strcat(image_str, "[+toc]");
1631         }
1632         else if (parseccd(GetIsoFile()) == 0) {
1633                 strcat(image_str, "[+ccd]");
1634         }
1635         else if (parsemds(GetIsoFile()) == 0) {
1636                 strcat(image_str, "[+mds]");
1637         }
1638         else if (parsecue(GetIsoFile()) == 0) {
1639                 strcat(image_str, "[+cue]");
1640         }
1641         if (handlepbp(GetIsoFile()) == 0) {
1642                 strcat(image_str, "[+pbp]");
1643                 CDR_getBuffer = ISOgetBuffer_compr;
1644                 cdimg_read_func = cdread_compressed;
1645         }
1646         else if (handlecbin(GetIsoFile()) == 0) {
1647                 strcat(image_str, "[+cbin]");
1648                 CDR_getBuffer = ISOgetBuffer_compr;
1649                 cdimg_read_func = cdread_compressed;
1650         }
1651 #ifdef HAVE_CHD
1652         else if (handlechd(GetIsoFile()) == 0) {
1653                 strcat(image_str, "[+chd]");
1654                 CDR_getBuffer = ISOgetBuffer_chd;
1655                 cdimg_read_func = cdread_chd;
1656         }
1657 #endif
1658
1659         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1660                 strcat(image_str, "[+sub]");
1661         }
1662         if (opensbifile(GetIsoFile()) == 0) {
1663                 strcat(image_str, "[+sbi]");
1664         }
1665
1666         fseeko(cdHandle, 0, SEEK_END);
1667
1668         // maybe user selected metadata file instead of main .bin ..
1669         bin_filename = GetIsoFile();
1670         if (ftello(cdHandle) < 2352 * 0x10) {
1671                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1672                 FILE *tmpf = NULL;
1673                 size_t i;
1674                 char *p;
1675
1676                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1677                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1678                 if (strlen(alt_bin_filename) >= 4) {
1679                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1680                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1681                                 strcpy(p, exts[i]);
1682                                 tmpf = fopen(alt_bin_filename, "rb");
1683                                 if (tmpf != NULL)
1684                                         break;
1685                         }
1686                 }
1687                 if (tmpf != NULL) {
1688                         bin_filename = alt_bin_filename;
1689                         fclose(cdHandle);
1690                         cdHandle = tmpf;
1691                         fseeko(cdHandle, 0, SEEK_END);
1692                 }
1693         }
1694
1695         // guess whether it is mode1/2048
1696         if (ftello(cdHandle) % 2048 == 0) {
1697                 unsigned int modeTest = 0;
1698                 fseek(cdHandle, 0, SEEK_SET);
1699                 fread(&modeTest, 4, 1, cdHandle);
1700                 if (SWAP32(modeTest) != 0xffffff00) {
1701                         strcat(image_str, "[2048]");
1702                         isMode1ISO = TRUE;
1703                 }
1704         }
1705         fseek(cdHandle, 0, SEEK_SET);
1706
1707         SysPrintf("%s.\n", image_str);
1708
1709         PrintTracks();
1710
1711         if (subChanMixed)
1712                 cdimg_read_func = cdread_sub_mixed;
1713         else if (isMode1ISO)
1714                 cdimg_read_func = cdread_2048;
1715
1716         // make sure we have another handle open for cdda
1717         if (numtracks > 1 && ti[1].handle == NULL) {
1718                 ti[1].handle = fopen(bin_filename, "rb");
1719         }
1720         cdda_cur_sector = 0;
1721         cdda_file_offset = 0;
1722
1723   if (Config.AsyncCD) {
1724     readThreadStart();
1725   }
1726         return 0;
1727 }
1728
1729 static long CALLBACK ISOclose(void) {
1730         int i;
1731
1732         if (cdHandle != NULL) {
1733                 fclose(cdHandle);
1734                 cdHandle = NULL;
1735         }
1736         if (subHandle != NULL) {
1737                 fclose(subHandle);
1738                 subHandle = NULL;
1739         }
1740         stopCDDA();
1741         cddaHandle = NULL;
1742
1743         if (compr_img != NULL) {
1744                 free(compr_img->index_table);
1745                 free(compr_img);
1746                 compr_img = NULL;
1747         }
1748
1749 #ifdef HAVE_CHD
1750         if (chd_img != NULL) {
1751                 chd_close(chd_img->chd);
1752                 free(chd_img->buffer);
1753                 free(chd_img);
1754                 chd_img = NULL;
1755         }
1756 #endif
1757
1758         for (i = 1; i <= numtracks; i++) {
1759                 if (ti[i].handle != NULL) {
1760                         fclose(ti[i].handle);
1761                         ti[i].handle = NULL;
1762                 }
1763         }
1764         numtracks = 0;
1765         ti[1].type = 0;
1766         UnloadSBI();
1767
1768         memset(cdbuffer, 0, sizeof(cdbuffer));
1769         CDR_getBuffer = ISOgetBuffer;
1770
1771   readThreadStop();
1772         return 0;
1773 }
1774
1775 static long CALLBACK ISOinit(void) {
1776         assert(cdHandle == NULL);
1777         assert(subHandle == NULL);
1778
1779         return 0; // do nothing
1780 }
1781
1782 static long CALLBACK ISOshutdown(void) {
1783         ISOclose();
1784         return 0;
1785 }
1786
1787 // return Starting and Ending Track
1788 // buffer:
1789 //  byte 0 - start track
1790 //  byte 1 - end track
1791 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1792         buffer[0] = 1;
1793
1794         if (numtracks > 0) {
1795                 buffer[1] = numtracks;
1796         }
1797         else {
1798                 buffer[1] = 1;
1799         }
1800
1801         return 0;
1802 }
1803
1804 // return Track Time
1805 // buffer:
1806 //  byte 0 - frame
1807 //  byte 1 - second
1808 //  byte 2 - minute
1809 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1810         if (track == 0) {
1811                 unsigned int sect;
1812                 unsigned char time[3];
1813                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1814                 sec2msf(sect, (char *)time);
1815                 buffer[2] = time[0];
1816                 buffer[1] = time[1];
1817                 buffer[0] = time[2];
1818         }
1819         else if (numtracks > 0 && track <= numtracks) {
1820                 buffer[2] = ti[track].start[0];
1821                 buffer[1] = ti[track].start[1];
1822                 buffer[0] = ti[track].start[2];
1823         }
1824         else {
1825                 buffer[2] = 0;
1826                 buffer[1] = 2;
1827                 buffer[0] = 0;
1828         }
1829
1830         return 0;
1831 }
1832
1833 // decode 'raw' subchannel data ripped by cdrdao
1834 static void DecodeRawSubData(void) {
1835         unsigned char subQData[12];
1836         int i;
1837
1838         memset(subQData, 0, sizeof(subQData));
1839
1840         for (i = 0; i < 8 * 12; i++) {
1841                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1842                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1843                 }
1844         }
1845
1846         memcpy(&subbuffer[12], subQData, 12);
1847 }
1848
1849 // read track
1850 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1851 // uses bcd format
1852 static long CALLBACK ISOreadTrack(unsigned char *time) {
1853         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1854         long ret;
1855
1856         if (cdHandle == NULL) {
1857                 return -1;
1858         }
1859
1860         if (pregapOffset) {
1861                 subChanMissing = FALSE;
1862                 if (sector >= pregapOffset) {
1863                         sector -= 2 * 75;
1864                         if (sector < pregapOffset)
1865                                 subChanMissing = TRUE;
1866                 }
1867         }
1868
1869         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1870         if (ret < 0)
1871                 return -1;
1872
1873         if (subHandle != NULL) {
1874                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1875                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1876
1877                 if (subChanRaw) DecodeRawSubData();
1878         }
1879
1880         return 0;
1881 }
1882
1883 // plays cdda audio
1884 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1885 // does NOT uses bcd format
1886 static long CALLBACK ISOplay(unsigned char *time) {
1887         unsigned int i;
1888
1889         if (numtracks <= 1)
1890                 return 0;
1891
1892         // find the track
1893         cdda_cur_sector = msf2sec((char *)time);
1894         for (i = numtracks; i > 1; i--) {
1895                 cdda_first_sector = msf2sec(ti[i].start);
1896                 if (cdda_first_sector <= cdda_cur_sector + 2 * 75)
1897                         break;
1898         }
1899         cdda_file_offset = ti[i].start_offset;
1900
1901         // find the file that contains this track
1902         for (; i > 1; i--)
1903                 if (ti[i].handle != NULL)
1904                         break;
1905
1906         cddaHandle = ti[i].handle;
1907
1908         if (SPU_playCDDAchannel != NULL)
1909                 startCDDA();
1910
1911         return 0;
1912 }
1913
1914 // stops cdda audio
1915 static long CALLBACK ISOstop(void) {
1916         stopCDDA();
1917         return 0;
1918 }
1919
1920 // gets subchannel data
1921 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1922         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1923                 return subbuffer;
1924         }
1925
1926         return NULL;
1927 }
1928
1929 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1930         u32 sect;
1931
1932         CDR__getStatus(stat);
1933
1934         if (playing) {
1935                 stat->Type = 0x02;
1936                 stat->Status |= 0x80;
1937         }
1938         else {
1939                 // BIOS - boot ID (CD type)
1940                 stat->Type = ti[1].type;
1941         }
1942
1943         // relative -> absolute time
1944         sect = cddaCurPos;
1945         sec2msf(sect, (char *)stat->Time);
1946
1947         return 0;
1948 }
1949
1950 // read CDDA sector into buffer
1951 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1952         unsigned char msf[3] = {m, s, f};
1953         unsigned int file, track, track_start = 0;
1954         int ret;
1955
1956         cddaCurPos = msf2sec((char *)msf);
1957
1958         // find current track index
1959         for (track = numtracks; ; track--) {
1960                 track_start = msf2sec(ti[track].start);
1961                 if (track_start <= cddaCurPos)
1962                         break;
1963                 if (track == 1)
1964                         break;
1965         }
1966
1967         // data tracks play silent
1968         if (ti[track].type != CDDA) {
1969                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1970                 return 0;
1971         }
1972
1973         file = 1;
1974         if (multifile) {
1975                 // find the file that contains this track
1976                 for (file = track; file > 1; file--)
1977                         if (ti[file].handle != NULL)
1978                                 break;
1979         }
1980
1981         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1982                 buffer, cddaCurPos - track_start);
1983         if (ret != CD_FRAMESIZE_RAW) {
1984                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1985                 return -1;
1986         }
1987
1988         if (cddaBigEndian) {
1989                 int i;
1990                 unsigned char tmp;
1991
1992                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1993                         tmp = buffer[i * 2];
1994                         buffer[i * 2] = buffer[i * 2 + 1];
1995                         buffer[i * 2 + 1] = tmp;
1996                 }
1997         }
1998
1999         return 0;
2000 }
2001
2002 void cdrIsoInit(void) {
2003         CDR_init = ISOinit;
2004         CDR_shutdown = ISOshutdown;
2005         CDR_open = ISOopen;
2006         CDR_close = ISOclose;
2007         CDR_getTN = ISOgetTN;
2008         CDR_getTD = ISOgetTD;
2009         CDR_readTrack = ISOreadTrack;
2010         CDR_getBuffer = ISOgetBuffer;
2011         CDR_play = ISOplay;
2012         CDR_stop = ISOstop;
2013         CDR_getBufferSub = ISOgetBufferSub;
2014         CDR_getStatus = ISOgetStatus;
2015         CDR_readCDDA = ISOreadCDDA;
2016
2017         CDR_getDriveLetter = CDR__getDriveLetter;
2018         CDR_configure = CDR__configure;
2019         CDR_test = CDR__test;
2020         CDR_about = CDR__about;
2021         CDR_setfilename = CDR__setfilename;
2022
2023         numtracks = 0;
2024 }
2025
2026 int cdrIsoActive(void) {
2027         return (cdHandle != NULL);
2028 }