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 <compat/fopen_utf8.h>
  23
  24 #include "psxcommon.h"
  25 #include "plugins.h"
  26 #include "cdrom.h"
  27 #include "cdriso.h"
  28 #include "ppf.h"
  29
  30 #include <errno.h>
  31 #include <zlib.h>
  32 #ifdef HAVE_CHD
  33 #include <chd.h>
  34 #endif
  35
  36 #ifdef _WIN32
  37 #define WIN32_LEAN_AND_MEAN
  38 #include <process.h>
  39 #include <windows.h>
  40 #define strcasecmp _stricmp
  41 #define usleep(x) (Sleep((x) / 1000))
  42 #else
  43 #include <pthread.h>
  44 #include <sys/time.h>
  45 #include <unistd.h>
  46 #endif
  47
  48 #define OFF_T_MSB ((off_t)1 << (sizeof(off_t) * 8 - 1))
  49
  50 unsigned int cdrIsoMultidiskCount;
  51 unsigned int cdrIsoMultidiskSelect;
  52
  53 static FILE *cdHandle = NULL;
  54 static FILE *cddaHandle = NULL;
  55 static FILE *subHandle = NULL;
  56
  57 static boolean subChanMixed = FALSE;
  58 static boolean subChanRaw = FALSE;
  59 static boolean subChanMissing = FALSE;
  60
  61 static boolean multifile = FALSE;
  62
  63 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
  64 static unsigned char subbuffer[SUB_FRAMESIZE];
  65
  66 static unsigned char sndbuffer[CD_FRAMESIZE_RAW * 10];
  67
  68 #define CDDA_FRAMETIME                  (1000 * (sizeof(sndbuffer) / CD_FRAMESIZE_RAW) / 75)
  69
  70 #ifdef _WIN32
  71 static HANDLE threadid;
  72 #else
  73 static pthread_t threadid;
  74 #endif
  75 static unsigned int initial_offset = 0;
  76 static boolean playing = FALSE;
  77 static boolean cddaBigEndian = FALSE;
  78 // cdda sectors in toc, byte offset in file
  79 static unsigned int cdda_cur_sector;
  80 static unsigned int cdda_first_sector;
  81 static unsigned int cdda_file_offset;
  82 /* Frame offset into CD image where pregap data would be found if it was there.
  83  * If a game seeks there we must *not* return subchannel data since it's
  84  * not in the CD image, so that cdrom code can fake subchannel data instead.
  85  * XXX: there could be multiple pregaps but PSX dumps only have one? */
  86 static unsigned int pregapOffset;
  87
  88 #define cddaCurPos cdda_cur_sector
  89
  90 // compressed image stuff
  91 static struct {
  92         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
  93         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
  94         off_t *index_table;
  95         unsigned int index_len;
  96         unsigned int block_shift;
  97         unsigned int current_block;
  98         unsigned int sector_in_blk;
  99 } *compr_img;
 100
 101 #ifdef HAVE_CHD
 102 static struct {
 103         unsigned char (*buffer)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE];
 104         chd_file* chd;
 105         const chd_header* header;
 106         unsigned int sectors_per_hunk;
 107         unsigned int current_hunk;
 108         unsigned int sector_in_hunk;
 109 } *chd_img;
 110 #endif
 111
 112 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
 113
 114 char* CALLBACK CDR__getDriveLetter(void);
 115 long CALLBACK CDR__configure(void);
 116 long CALLBACK CDR__test(void);
 117 void CALLBACK CDR__about(void);
 118 long CALLBACK CDR__setfilename(char *filename);
 119 long CALLBACK CDR__getStatus(struct CdrStat *stat);
 120
 121 static void DecodeRawSubData(void);
 122
 123 struct trackinfo {
 124         enum {DATA=1, CDDA} type;
 125         char start[3];          // MSF-format
 126         char length[3];         // MSF-format
 127         FILE *handle;           // for multi-track images CDDA
 128         unsigned int start_offset; // byte offset from start of above file
 129 };
 130
 131 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
 132
 133 static int numtracks = 0;
 134 static struct trackinfo ti[MAXTRACKS];
 135
 136 // get a sector from a msf-array
 137 static unsigned int msf2sec(char *msf) {
 138         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 139 }
 140
 141 static void sec2msf(unsigned int s, char *msf) {
 142         msf[0] = s / 75 / 60;
 143         s = s - msf[0] * 75 * 60;
 144         msf[1] = s / 75;
 145         s = s - msf[1] * 75;
 146         msf[2] = s;
 147 }
 148
 149 // divide a string of xx:yy:zz into m, s, f
 150 static void tok2msf(char *time, char *msf) {
 151         char *token;
 152
 153         token = strtok(time, ":");
 154         if (token) {
 155                 msf[0] = atoi(token);
 156         }
 157         else {
 158                 msf[0] = 0;
 159         }
 160
 161         token = strtok(NULL, ":");
 162         if (token) {
 163                 msf[1] = atoi(token);
 164         }
 165         else {
 166                 msf[1] = 0;
 167         }
 168
 169         token = strtok(NULL, ":");
 170         if (token) {
 171                 msf[2] = atoi(token);
 172         }
 173         else {
 174                 msf[2] = 0;
 175         }
 176 }
 177
 178 #ifndef _WIN32
 179 static long GetTickCount(void) {
 180         static time_t           initial_time = 0;
 181         struct timeval          now;
 182
 183         gettimeofday(&now, NULL);
 184
 185         if (initial_time == 0) {
 186                 initial_time = now.tv_sec;
 187         }
 188
 189         return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
 190 }
 191 #endif
 192
 193 // this thread plays audio data
 194 #ifdef _WIN32
 195 static void playthread(void *param)
 196 #else
 197 static void *playthread(void *param)
 198 #endif
 199 {
 200         long osleep, d, t, i, s;
 201         unsigned char   tmp;
 202         int ret = 0, sector_offs;
 203
 204         t = GetTickCount();
 205
 206         while (playing) {
 207                 s = 0;
 208                 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
 209                         sector_offs = cdda_cur_sector - cdda_first_sector;
 210                         if (sector_offs < 0) {
 211                                 d = CD_FRAMESIZE_RAW;
 212                                 memset(sndbuffer + s, 0, d);
 213                         }
 214                         else {
 215                                 d = cdimg_read_func(cddaHandle, cdda_file_offset,
 216                                         sndbuffer + s, sector_offs);
 217                                 if (d < CD_FRAMESIZE_RAW)
 218                                         break;
 219                         }
 220
 221                         s += d;
 222                         cdda_cur_sector++;
 223                 }
 224
 225                 if (s == 0) {
 226                         playing = FALSE;
 227                         initial_offset = 0;
 228                         break;
 229                 }
 230
 231                 if (!cdr.Muted && playing) {
 232                         if (cddaBigEndian) {
 233                                 for (i = 0; i < s / 2; i++) {
 234                                         tmp = sndbuffer[i * 2];
 235                                         sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
 236                                         sndbuffer[i * 2 + 1] = tmp;
 237                                 }
 238                         }
 239
 240                         // can't do it yet due to readahead..
 241                         //cdrAttenuate((short *)sndbuffer, s / 4, 1);
 242                         do {
 243                                 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
 244                                 if (ret == 0x7761)
 245             {
 246                                         usleep(6 * 1000);
 247             }
 248                         } while (ret == 0x7761 && playing); // rearmed_wait
 249                 }
 250
 251                 if (ret != 0x676f) { // !rearmed_go
 252                         // do approx sleep
 253                         long now;
 254
 255                         // HACK: stop feeding data while emu is paused
 256                         extern int stop;
 257                         while (stop && playing)
 258          {
 259                                 usleep(10000);
 260          }
 261
 262                         now = GetTickCount();
 263                         osleep = t - now;
 264                         if (osleep <= 0) {
 265                                 osleep = 1;
 266                                 t = now;
 267                         }
 268                         else if (osleep > CDDA_FRAMETIME) {
 269                                 osleep = CDDA_FRAMETIME;
 270                                 t = now;
 271                         }
 272
 273                         usleep(osleep * 1000);
 274                         t += CDDA_FRAMETIME;
 275                 }
 276
 277         }
 278
 279 #ifdef _WIN32
 280         _endthread();
 281 #else
 282         pthread_exit(0);
 283         return NULL;
 284 #endif
 285 }
 286
 287 // stop the CDDA playback
 288 static void stopCDDA() {
 289         if (!playing) {
 290                 return;
 291         }
 292
 293         playing = FALSE;
 294 #ifdef _WIN32
 295         WaitForSingleObject(threadid, INFINITE);
 296 #else
 297         pthread_join(threadid, NULL);
 298 #endif
 299 }
 300
 301 // start the CDDA playback
 302 static void startCDDA(void) {
 303         if (playing) {
 304                 stopCDDA();
 305         }
 306
 307         playing = TRUE;
 308
 309 #ifdef _WIN32
 310         threadid = (HANDLE)_beginthread(playthread, 0, NULL);
 311 #else
 312         pthread_create(&threadid, NULL, playthread, NULL);
 313 #endif
 314 }
 315
 316 // this function tries to get the .toc file of the given .bin
 317 // the necessary data is put into the ti (trackinformation)-array
 318 static int parsetoc(const char *isofile) {
 319         char                    tocname[MAXPATHLEN];
 320         FILE                    *fi;
 321         char                    linebuf[256], tmp[256], name[256];
 322         char                    *token;
 323         char                    time[20], time2[20];
 324         unsigned int    t, sector_offs, sector_size;
 325         unsigned int    current_zero_gap = 0;
 326
 327         numtracks = 0;
 328
 329         // copy name of the iso and change extension from .bin to .toc
 330         strncpy(tocname, isofile, sizeof(tocname));
 331         tocname[MAXPATHLEN - 1] = '\0';
 332         if (strlen(tocname) >= 4) {
 333                 strcpy(tocname + strlen(tocname) - 4, ".toc");
 334         }
 335         else {
 336                 return -1;
 337         }
 338
 339         if ((fi = fopen_utf8(tocname, "r")) == NULL) {
 340                 // try changing extension to .cue (to satisfy some stupid tutorials)
 341                 strcpy(tocname + strlen(tocname) - 4, ".cue");
 342                 if ((fi = fopen_utf8(tocname, "r")) == NULL) {
 343                         // if filename is image.toc.bin, try removing .bin (for Brasero)
 344                         strcpy(tocname, isofile);
 345                         t = strlen(tocname);
 346                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
 347                                 tocname[t - 4] = '\0';
 348                                 if ((fi = fopen_utf8(tocname, "r")) == NULL) {
 349                                         return -1;
 350                                 }
 351                         }
 352                         else {
 353                                 return -1;
 354                         }
 355                 }
 356                 // check if it's really a TOC named as a .cue
 357                 fgets(linebuf, sizeof(linebuf), fi);
 358                 token = strtok(linebuf, " ");
 359                 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
 360                         fclose(fi);
 361                         return -1;
 362                 }
 363                 fseek(fi, 0, SEEK_SET);
 364         }
 365
 366         memset(&ti, 0, sizeof(ti));
 367         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
 368
 369         sector_size = CD_FRAMESIZE_RAW;
 370         sector_offs = 2 * 75;
 371
 372         // parse the .toc file
 373         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 374                 // search for tracks
 375                 strncpy(tmp, linebuf, sizeof(linebuf));
 376                 token = strtok(tmp, " ");
 377
 378                 if (token == NULL) continue;
 379
 380                 if (!strcmp(token, "TRACK")) {
 381                         sector_offs += current_zero_gap;
 382                         current_zero_gap = 0;
 383
 384                         // get type of track
 385                         token = strtok(NULL, " ");
 386                         numtracks++;
 387
 388                         if (!strncmp(token, "MODE2_RAW", 9)) {
 389                                 ti[numtracks].type = DATA;
 390                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
 391
 392                                 // check if this image contains mixed subchannel data
 393                                 token = strtok(NULL, " ");
 394                                 if (token != NULL && !strncmp(token, "RW", 2)) {
 395                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
 396                                         subChanMixed = TRUE;
 397                                         if (!strncmp(token, "RW_RAW", 6))
 398                                                 subChanRaw = TRUE;
 399                                 }
 400                         }
 401                         else if (!strncmp(token, "AUDIO", 5)) {
 402                                 ti[numtracks].type = CDDA;
 403                         }
 404                 }
 405                 else if (!strcmp(token, "DATAFILE")) {
 406                         if (ti[numtracks].type == CDDA) {
 407                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
 408                                 ti[numtracks].start_offset = t;
 409                                 t = t / sector_size + sector_offs;
 410                                 sec2msf(t, (char *)&ti[numtracks].start);
 411                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 412                         }
 413                         else {
 414                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
 415                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
 416                         }
 417                 }
 418                 else if (!strcmp(token, "FILE")) {
 419                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
 420                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
 421                         t += msf2sec(ti[numtracks].start) * sector_size;
 422                         ti[numtracks].start_offset = t;
 423                         t = t / sector_size + sector_offs;
 424                         sec2msf(t, (char *)&ti[numtracks].start);
 425                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
 426                 }
 427                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
 428                         // skip unneeded optional fields
 429                         while (token != NULL) {
 430                                 token = strtok(NULL, " ");
 431                                 if (strchr(token, ':') != NULL)
 432                                         break;
 433                         }
 434                         if (token != NULL) {
 435                                 tok2msf(token, tmp);
 436                                 current_zero_gap = msf2sec(tmp);
 437                         }
 438                         if (numtracks > 1) {
 439                                 t = ti[numtracks - 1].start_offset;
 440                                 t /= sector_size;
 441                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
 442                         }
 443                 }
 444                 else if (!strcmp(token, "START")) {
 445                         token = strtok(NULL, " ");
 446                         if (token != NULL && strchr(token, ':')) {
 447                                 tok2msf(token, tmp);
 448                                 t = msf2sec(tmp);
 449                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
 450                                 t = msf2sec(ti[numtracks].start) + t;
 451                                 sec2msf(t, (char *)&ti[numtracks].start);
 452                         }
 453                 }
 454         }
 455
 456         fclose(fi);
 457
 458         return 0;
 459 }
 460
 461 // this function tries to get the .cue file of the given .bin
 462 // the necessary data is put into the ti (trackinformation)-array
 463 static int parsecue(const char *isofile) {
 464         char                    cuename[MAXPATHLEN];
 465         char                    filepath[MAXPATHLEN];
 466         char                    *incue_fname;
 467         FILE                    *fi;
 468         char                    *token;
 469         char                    time[20];
 470         char                    *tmp;
 471         char                    linebuf[256], tmpb[256], dummy[256];
 472         unsigned int    incue_max_len;
 473         unsigned int    t, file_len, mode, sector_offs;
 474         unsigned int    sector_size = 2352;
 475
 476         numtracks = 0;
 477
 478         // copy name of the iso and change extension from .bin to .cue
 479         strncpy(cuename, isofile, sizeof(cuename));
 480         cuename[MAXPATHLEN - 1] = '\0';
 481         if (strlen(cuename) >= 4) {
 482                 // If 'isofile' is a '.cd<X>' file, use it as a .cue file
 483                 //  and don't try to search the additional .cue file
 484                 if (strncasecmp(cuename + strlen(cuename) - 4, ".cd", 3) != 0 )
 485                         strcpy(cuename + strlen(cuename) - 4, ".cue");
 486         }
 487         else {
 488                 return -1;
 489         }
 490
 491         if ((fi = fopen_utf8(cuename, "r")) == NULL) {
 492                 return -1;
 493         }
 494
 495         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
 496         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
 497         // that...
 498         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 499                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
 500                         // Don't proceed further, as this is actually a .toc file rather
 501                         // than a .cue file.
 502                         fclose(fi);
 503                         return parsetoc(isofile);
 504                 }
 505                 fseek(fi, 0, SEEK_SET);
 506         }
 507
 508         // build a path for files referenced in .cue
 509         strncpy(filepath, cuename, sizeof(filepath));
 510         tmp = strrchr(filepath, '/');
 511         if (tmp == NULL)
 512                 tmp = strrchr(filepath, '\\');
 513         if (tmp != NULL)
 514                 tmp++;
 515         else
 516                 tmp = filepath;
 517         *tmp = 0;
 518         filepath[sizeof(filepath) - 1] = 0;
 519         incue_fname = tmp;
 520         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
 521
 522         memset(&ti, 0, sizeof(ti));
 523
 524         file_len = 0;
 525         sector_offs = 2 * 75;
 526
 527         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 528                 strncpy(dummy, linebuf, sizeof(linebuf));
 529                 token = strtok(dummy, " ");
 530
 531                 if (token == NULL) {
 532                         continue;
 533                 }
 534
 535                 if (!strcmp(token, "TRACK")) {
 536                         numtracks++;
 537
 538                         sector_size = 0;
 539                         if (strstr(linebuf, "AUDIO") != NULL) {
 540                                 ti[numtracks].type = CDDA;
 541                                 sector_size = 2352;
 542                         }
 543                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
 544                                 ti[numtracks].type = DATA;
 545                         else {
 546                                 SysPrintf(".cue: failed to parse TRACK\n");
 547                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
 548                         }
 549                         if (sector_size == 0)
 550                                 sector_size = 2352;
 551                 }
 552                 else if (!strcmp(token, "INDEX")) {
 553                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
 554                                 SysPrintf(".cue: failed to parse INDEX\n");
 555                         tok2msf(time, (char *)&ti[numtracks].start);
 556
 557                         t = msf2sec(ti[numtracks].start);
 558                         ti[numtracks].start_offset = t * sector_size;
 559                         t += sector_offs;
 560                         sec2msf(t, ti[numtracks].start);
 561
 562                         // default track length to file length
 563                         t = file_len - ti[numtracks].start_offset / sector_size;
 564                         sec2msf(t, ti[numtracks].length);
 565
 566                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
 567                                 // this track uses the same file as the last,
 568                                 // start of this track is last track's end
 569                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 570                                 sec2msf(t, ti[numtracks - 1].length);
 571                         }
 572                         if (numtracks > 1 && pregapOffset == -1)
 573                                 pregapOffset = ti[numtracks].start_offset / sector_size;
 574                 }
 575                 else if (!strcmp(token, "PREGAP")) {
 576                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
 577                                 tok2msf(time, dummy);
 578                                 sector_offs += msf2sec(dummy);
 579                         }
 580                         pregapOffset = -1; // mark to fill track start_offset
 581                 }
 582                 else if (!strcmp(token, "FILE")) {
 583                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
 584                         if (t != 1)
 585                                 sscanf(linebuf, " FILE %255s", tmpb);
 586
 587                         tmp = strrchr(tmpb, '\\');
 588                         if (tmp == NULL)
 589                                 tmp = strrchr(tmpb, '/');
 590                         if (tmp != NULL)
 591                                 tmp++;
 592                         else
 593                                 tmp = tmpb;
 594                         strncpy(incue_fname, tmp, incue_max_len);
 595                         ti[numtracks + 1].handle = fopen_utf8(filepath, "rb");
 596
 597                         // update global offset if this is not first file in this .cue
 598                         if (numtracks + 1 > 1) {
 599                                 multifile = 1;
 600                                 sector_offs += file_len;
 601                         }
 602
 603                         file_len = 0;
 604                         if (ti[numtracks + 1].handle == NULL) {
 605                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
 606                                 continue;
 607                         }
 608                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
 609                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
 610
 611                         if (numtracks == 0 && strlen(isofile) >= 4 &&
 612                                 (strcmp(isofile + strlen(isofile) - 4, ".cue") == 0 ||
 613                                 strncasecmp(isofile + strlen(isofile) - 4, ".cd", 3) == 0)) {
 614                                 // user selected .cue/.cdX as image file, use it's data track instead
 615                                 fclose(cdHandle);
 616                                 cdHandle = fopen_utf8(filepath, "rb");
 617                         }
 618                 }
 619         }
 620
 621         fclose(fi);
 622
 623         // if there are no tracks detected, then it's not a cue file
 624         if (!numtracks)
 625                 return -1;
 626
 627         return 0;
 628 }
 629
 630 // this function tries to get the .ccd file of the given .img
 631 // the necessary data is put into the ti (trackinformation)-array
 632 static int parseccd(const char *isofile) {
 633         char                    ccdname[MAXPATHLEN];
 634         FILE                    *fi;
 635         char                    linebuf[256];
 636         unsigned int    t;
 637
 638         numtracks = 0;
 639
 640         // copy name of the iso and change extension from .img to .ccd
 641         strncpy(ccdname, isofile, sizeof(ccdname));
 642         ccdname[MAXPATHLEN - 1] = '\0';
 643         if (strlen(ccdname) >= 4) {
 644                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
 645         }
 646         else {
 647                 return -1;
 648         }
 649
 650         if ((fi = fopen_utf8(ccdname, "r")) == NULL) {
 651                 return -1;
 652         }
 653
 654         memset(&ti, 0, sizeof(ti));
 655
 656         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
 657                 if (!strncmp(linebuf, "[TRACK", 6)){
 658                         numtracks++;
 659                 }
 660                 else if (!strncmp(linebuf, "MODE=", 5)) {
 661                         sscanf(linebuf, "MODE=%d", &t);
 662                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
 663                 }
 664                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
 665                         sscanf(linebuf, "INDEX 1=%d", &t);
 666                         sec2msf(t + 2 * 75, ti[numtracks].start);
 667                         ti[numtracks].start_offset = t * 2352;
 668
 669                         // If we've already seen another track, this is its end
 670                         if (numtracks > 1) {
 671                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
 672                                 sec2msf(t, ti[numtracks - 1].length);
 673                         }
 674                 }
 675         }
 676
 677         fclose(fi);
 678
 679         // Fill out the last track's end based on size
 680         if (numtracks >= 1) {
 681                 fseek(cdHandle, 0, SEEK_END);
 682                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
 683                 sec2msf(t, ti[numtracks].length);
 684         }
 685
 686         return 0;
 687 }
 688
 689 // this function tries to get the .mds file of the given .mdf
 690 // the necessary data is put into the ti (trackinformation)-array
 691 static int parsemds(const char *isofile) {
 692         char                    mdsname[MAXPATHLEN];
 693         FILE                    *fi;
 694         unsigned int    offset, extra_offset, l, i;
 695         unsigned short  s;
 696
 697         numtracks = 0;
 698
 699         // copy name of the iso and change extension from .mdf to .mds
 700         strncpy(mdsname, isofile, sizeof(mdsname));
 701         mdsname[MAXPATHLEN - 1] = '\0';
 702         if (strlen(mdsname) >= 4) {
 703                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
 704         }
 705         else {
 706                 return -1;
 707         }
 708
 709         if ((fi = fopen_utf8(mdsname, "rb")) == NULL) {
 710                 return -1;
 711         }
 712
 713         memset(&ti, 0, sizeof(ti));
 714
 715         // check if it's a valid mds file
 716         fread(&i, 1, sizeof(unsigned int), fi);
 717         i = SWAP32(i);
 718         if (i != 0x4944454D) {
 719                 // not an valid mds file
 720                 fclose(fi);
 721                 return -1;
 722         }
 723
 724         // get offset to session block
 725         fseek(fi, 0x50, SEEK_SET);
 726         fread(&offset, 1, sizeof(unsigned int), fi);
 727         offset = SWAP32(offset);
 728
 729         // get total number of tracks
 730         offset += 14;
 731         fseek(fi, offset, SEEK_SET);
 732         fread(&s, 1, sizeof(unsigned short), fi);
 733         s = SWAP16(s);
 734         numtracks = s;
 735
 736         // get offset to track blocks
 737         fseek(fi, 4, SEEK_CUR);
 738         fread(&offset, 1, sizeof(unsigned int), fi);
 739         offset = SWAP32(offset);
 740
 741         // skip lead-in data
 742         while (1) {
 743                 fseek(fi, offset + 4, SEEK_SET);
 744                 if (fgetc(fi) < 0xA0) {
 745                         break;
 746                 }
 747                 offset += 0x50;
 748         }
 749
 750         // check if the image contains mixed subchannel data
 751         fseek(fi, offset + 1, SEEK_SET);
 752         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
 753
 754         // read track data
 755         for (i = 1; i <= numtracks; i++) {
 756                 fseek(fi, offset, SEEK_SET);
 757
 758                 // get the track type
 759                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
 760                 fseek(fi, 8, SEEK_CUR);
 761
 762                 // get the track starting point
 763                 ti[i].start[0] = fgetc(fi);
 764                 ti[i].start[1] = fgetc(fi);
 765                 ti[i].start[2] = fgetc(fi);
 766
 767                 fread(&extra_offset, 1, sizeof(unsigned int), fi);
 768                 extra_offset = SWAP32(extra_offset);
 769
 770                 // get track start offset (in .mdf)
 771                 fseek(fi, offset + 0x28, SEEK_SET);
 772                 fread(&l, 1, sizeof(unsigned int), fi);
 773                 l = SWAP32(l);
 774                 ti[i].start_offset = l;
 775
 776                 // get pregap
 777                 fseek(fi, extra_offset, SEEK_SET);
 778                 fread(&l, 1, sizeof(unsigned int), fi);
 779                 l = SWAP32(l);
 780                 if (l != 0 && i > 1)
 781                         pregapOffset = msf2sec(ti[i].start);
 782
 783                 // get the track length
 784                 fread(&l, 1, sizeof(unsigned int), fi);
 785                 l = SWAP32(l);
 786                 sec2msf(l, ti[i].length);
 787
 788                 offset += 0x50;
 789         }
 790
 791         fclose(fi);
 792         return 0;
 793 }
 794
 795 static int handlepbp(const char *isofile) {
 796         struct {
 797                 unsigned int sig;
 798                 unsigned int dontcare[8];
 799                 unsigned int psar_offs;
 800         } pbp_hdr;
 801         struct {
 802                 unsigned char type;
 803                 unsigned char pad0;
 804                 unsigned char track;
 805                 char index0[3];
 806                 char pad1;
 807                 char index1[3];
 808         } toc_entry;
 809         struct {
 810                 unsigned int offset;
 811                 unsigned int size;
 812                 unsigned int dontcare[6];
 813         } index_entry;
 814         char psar_sig[11];
 815         off_t psisoimg_offs, cdimg_base;
 816         unsigned int t, cd_length;
 817         unsigned int offsettab[8];
 818         const char *ext = NULL;
 819         int i, ret;
 820
 821         if (strlen(isofile) >= 4)
 822                 ext = isofile + strlen(isofile) - 4;
 823         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
 824                 return -1;
 825
 826         fseeko(cdHandle, 0, SEEK_SET);
 827
 828         numtracks = 0;
 829
 830         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
 831         if (ret != sizeof(pbp_hdr)) {
 832                 SysPrintf("failed to read pbp\n");
 833                 goto fail_io;
 834         }
 835
 836         ret = fseeko(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
 837         if (ret != 0) {
 838                 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
 839                 goto fail_io;
 840         }
 841
 842         psisoimg_offs = pbp_hdr.psar_offs;
 843         fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 844         psar_sig[10] = 0;
 845         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
 846                 // multidisk image?
 847                 ret = fseeko(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
 848                 if (ret != 0) {
 849                         SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
 850                         goto fail_io;
 851                 }
 852
 853                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
 854                         SysPrintf("failed to read offsettab\n");
 855                         goto fail_io;
 856                 }
 857
 858                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
 859                         if (offsettab[i] == 0)
 860                                 break;
 861                 }
 862                 cdrIsoMultidiskCount = i;
 863                 if (cdrIsoMultidiskCount == 0) {
 864                         SysPrintf("multidisk eboot has 0 images?\n");
 865                         goto fail_io;
 866                 }
 867
 868                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
 869                         cdrIsoMultidiskSelect = 0;
 870
 871                 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
 872
 873                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
 874                 if (ret != 0) {
 875                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
 876                         goto fail_io;
 877                 }
 878
 879                 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
 880                 psar_sig[10] = 0;
 881         }
 882
 883         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
 884                 SysPrintf("bad psar_sig: %s\n", psar_sig);
 885                 goto fail_io;
 886         }
 887
 888         // seek to TOC
 889         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
 890         if (ret != 0) {
 891                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
 892                 goto fail_io;
 893         }
 894
 895         // first 3 entries are special
 896         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
 897         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 898         numtracks = btoi(toc_entry.index1[0]);
 899
 900         fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 901         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
 902                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
 903
 904         for (i = 1; i <= numtracks; i++) {
 905                 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
 906
 907                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
 908
 909                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
 910                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
 911                 ti[i].start_offset *= 2352;
 912                 ti[i].start[0] = btoi(toc_entry.index1[0]);
 913                 ti[i].start[1] = btoi(toc_entry.index1[1]);
 914                 ti[i].start[2] = btoi(toc_entry.index1[2]);
 915
 916                 if (i > 1) {
 917                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
 918                         sec2msf(t, ti[i - 1].length);
 919                 }
 920         }
 921         t = cd_length - ti[numtracks].start_offset / 2352;
 922         sec2msf(t, ti[numtracks].length);
 923
 924         // seek to ISO index
 925         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
 926         if (ret != 0) {
 927                 SysPrintf("failed to seek to ISO index\n");
 928                 goto fail_io;
 929         }
 930
 931         compr_img = calloc(1, sizeof(*compr_img));
 932         if (compr_img == NULL)
 933                 goto fail_io;
 934
 935         compr_img->block_shift = 4;
 936         compr_img->current_block = (unsigned int)-1;
 937
 938         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
 939         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
 940         if (compr_img->index_table == NULL)
 941                 goto fail_io;
 942
 943         cdimg_base = psisoimg_offs + 0x100000;
 944         for (i = 0; i < compr_img->index_len; i++) {
 945                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
 946                 if (ret != sizeof(index_entry)) {
 947                         SysPrintf("failed to read index_entry #%d\n", i);
 948                         goto fail_index;
 949                 }
 950
 951                 if (index_entry.size == 0)
 952                         break;
 953
 954                 compr_img->index_table[i] = cdimg_base + index_entry.offset;
 955         }
 956         compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
 957
 958         return 0;
 959
 960 fail_index:
 961         free(compr_img->index_table);
 962         compr_img->index_table = NULL;
 963 fail_io:
 964         if (compr_img != NULL) {
 965                 free(compr_img);
 966                 compr_img = NULL;
 967         }
 968         return -1;
 969 }
 970
 971 static int handlecbin(const char *isofile) {
 972         struct
 973         {
 974                 char magic[4];
 975                 unsigned int header_size;
 976                 unsigned long long total_bytes;
 977                 unsigned int block_size;
 978                 unsigned char ver;              // 1
 979                 unsigned char align;
 980                 unsigned char rsv_06[2];
 981         } ciso_hdr;
 982         const char *ext = NULL;
 983         unsigned int *index_table = NULL;
 984         unsigned int index = 0, plain;
 985         int i, ret;
 986
 987         if (strlen(isofile) >= 5)
 988                 ext = isofile + strlen(isofile) - 5;
 989         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
 990                 return -1;
 991
 992         fseek(cdHandle, 0, SEEK_SET);
 993
 994         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
 995         if (ret != sizeof(ciso_hdr)) {
 996                 SysPrintf("failed to read ciso header\n");
 997                 return -1;
 998         }
 999
1000         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
1001                 SysPrintf("bad ciso header\n");
1002                 return -1;
1003         }
1004         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
1005                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
1006                 if (ret != 0) {
1007                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
1008                         return -1;
1009                 }
1010         }
1011
1012         compr_img = calloc(1, sizeof(*compr_img));
1013         if (compr_img == NULL)
1014                 goto fail_io;
1015
1016         compr_img->block_shift = 0;
1017         compr_img->current_block = (unsigned int)-1;
1018
1019         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
1020         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
1021         if (index_table == NULL)
1022                 goto fail_io;
1023
1024         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
1025         if (ret != compr_img->index_len) {
1026                 SysPrintf("failed to read index table\n");
1027                 goto fail_index;
1028         }
1029
1030         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
1031         if (compr_img->index_table == NULL)
1032                 goto fail_index;
1033
1034         for (i = 0; i < compr_img->index_len + 1; i++) {
1035                 index = index_table[i];
1036                 plain = index & 0x80000000;
1037                 index &= 0x7fffffff;
1038                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
1039                 if (plain)
1040                         compr_img->index_table[i] |= OFF_T_MSB;
1041         }
1042
1043         return 0;
1044
1045 fail_index:
1046         free(index_table);
1047 fail_io:
1048         if (compr_img != NULL) {
1049                 free(compr_img);
1050                 compr_img = NULL;
1051         }
1052         return -1;
1053 }
1054
1055 #ifdef HAVE_CHD
1056 static int handlechd(const char *isofile) {
1057         chd_img = calloc(1, sizeof(*chd_img));
1058         if (chd_img == NULL)
1059                 goto fail_io;
1060
1061         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
1062                 goto fail_io;
1063
1064         if (Config.CHD_Precache && (chd_precache(chd_img->chd) != CHDERR_NONE))
1065                 goto fail_io;
1066
1067    chd_img->header = chd_get_header(chd_img->chd);
1068
1069    chd_img->buffer = malloc(chd_img->header->hunkbytes);
1070    if (chd_img->buffer == NULL)
1071                 goto fail_io;
1072
1073    chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
1074    chd_img->current_hunk = (unsigned int)-1;
1075
1076    cddaBigEndian = TRUE;
1077
1078         numtracks = 0;
1079         int frame_offset = 0;
1080         int file_offset = 0;
1081         memset(ti, 0, sizeof(ti));
1082
1083    while (1)
1084    {
1085       struct {
1086          char type[64];
1087          char subtype[32];
1088          char pgtype[32];
1089          char pgsub[32];
1090          uint32_t track;
1091          uint32_t frames;
1092          uint32_t pregap;
1093          uint32_t postgap;
1094       } md = {};
1095       char meta[256];
1096       uint32_t meta_size = 0;
1097
1098       if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
1099          sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
1100       else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
1101          sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
1102       else
1103          break;
1104
1105                 if(md.track == 1)
1106                         md.pregap = 150;
1107                 else
1108                         sec2msf(msf2sec(ti[md.track-1].length) + md.pregap, ti[md.track-1].length);
1109
1110                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
1111
1112                 sec2msf(frame_offset + md.pregap, ti[md.track].start);
1113                 sec2msf(md.frames, ti[md.track].length);
1114
1115                 ti[md.track].start_offset = file_offset;
1116
1117                 frame_offset += md.pregap + md.frames + md.postgap;
1118                 file_offset += md.frames + md.postgap;
1119                 numtracks++;
1120         }
1121
1122         if (numtracks)
1123                 return 0;
1124
1125 fail_io:
1126         if (chd_img != NULL) {
1127                 free(chd_img->buffer);
1128                 free(chd_img);
1129                 chd_img = NULL;
1130         }
1131         return -1;
1132 }
1133 #endif
1134
1135 // this function tries to get the .sub file of the given .img
1136 static int opensubfile(const char *isoname) {
1137         char            subname[MAXPATHLEN];
1138
1139         // copy name of the iso and change extension from .img to .sub
1140         strncpy(subname, isoname, sizeof(subname));
1141         subname[MAXPATHLEN - 1] = '\0';
1142         if (strlen(subname) >= 4) {
1143                 strcpy(subname + strlen(subname) - 4, ".sub");
1144         }
1145         else {
1146                 return -1;
1147         }
1148
1149         subHandle = fopen_utf8(subname, "rb");
1150         if (subHandle == NULL) {
1151                 return -1;
1152         }
1153
1154         return 0;
1155 }
1156
1157 static int opensbifile(const char *isoname) {
1158         char            sbiname[MAXPATHLEN], disknum[MAXPATHLEN] = "0";
1159         int             s;
1160
1161         strncpy(sbiname, isoname, sizeof(sbiname));
1162         sbiname[MAXPATHLEN - 1] = '\0';
1163         if (strlen(sbiname) >= 4) {
1164                 if (cdrIsoMultidiskCount > 1) {
1165                         sprintf(disknum, "_%i.sbi", cdrIsoMultidiskSelect + 1);
1166                         strcpy(sbiname + strlen(sbiname) - 4, disknum);
1167                 }
1168                 else
1169                         strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1170         }
1171         else {
1172                 return -1;
1173         }
1174
1175         fseek(cdHandle, 0, SEEK_END);
1176         s = ftell(cdHandle) / 2352;
1177
1178         return LoadSBI(sbiname, s);
1179 }
1180
1181 #ifdef _WIN32
1182 static void readThreadStop() {}
1183 static void readThreadStart() {}
1184 #else
1185 static pthread_t read_thread_id;
1186
1187 static pthread_cond_t read_thread_msg_avail;
1188 static pthread_cond_t read_thread_msg_done;
1189 static pthread_mutex_t read_thread_msg_lock;
1190
1191 static pthread_cond_t sectorbuffer_cond;
1192 static pthread_mutex_t sectorbuffer_lock;
1193
1194 static boolean read_thread_running = FALSE;
1195 static int read_thread_sector_start = -1;
1196 static int read_thread_sector_end = -1;
1197
1198 typedef struct {
1199   int sector;
1200   long ret;
1201   unsigned char data[CD_FRAMESIZE_RAW];
1202 } SectorBufferEntry;
1203
1204 #define SECTOR_BUFFER_SIZE 4096
1205
1206 static SectorBufferEntry *sectorbuffer;
1207 static size_t sectorbuffer_index;
1208
1209 int (*sync_cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
1210 unsigned char *(*sync_CDR_getBuffer)(void);
1211
1212 static unsigned char * CALLBACK ISOgetBuffer_async(void);
1213 static int cdread_async(FILE *f, unsigned int base, void *dest, int sector);
1214
1215 static void *readThreadMain(void *param) {
1216   int max_sector = -1;
1217   int requested_sector_start = -1;
1218   int requested_sector_end = -1;
1219   int last_read_sector = -1;
1220   int index = 0;
1221
1222   int ra_sector = -1;
1223   int max_ra = 128;
1224   int initial_ra = 1;
1225   int speedmult_ra = 4;
1226
1227   int ra_count = 0;
1228   int how_far_ahead = 0;
1229
1230   unsigned char tmpdata[CD_FRAMESIZE_RAW];
1231   long ret;
1232
1233   max_sector = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1234
1235   while(1) {
1236     pthread_mutex_lock(&read_thread_msg_lock);
1237
1238     // If we don't have readahead and we don't have a sector request, wait for one.
1239     // If we still have readahead to go, don't block, just keep going.
1240     // And if we ever have a sector request pending, acknowledge and reset it.
1241
1242     if (!ra_count) {
1243       if (read_thread_sector_start == -1 && read_thread_running) {
1244         pthread_cond_wait(&read_thread_msg_avail, &read_thread_msg_lock);
1245       }
1246     }
1247
1248     if (read_thread_sector_start != -1) {
1249       requested_sector_start = read_thread_sector_start;
1250       requested_sector_end = read_thread_sector_end;
1251       read_thread_sector_start = -1;
1252       read_thread_sector_end = -1;
1253       pthread_cond_signal(&read_thread_msg_done);
1254     }
1255
1256     pthread_mutex_unlock(&read_thread_msg_lock);
1257
1258     if (!read_thread_running)
1259       break;
1260
1261     // Readahead code, based on the implementation in mednafen psx's cdromif.cpp
1262     if (requested_sector_start != -1) {
1263       if (last_read_sector != -1 && last_read_sector == (requested_sector_start - 1)) {
1264         how_far_ahead = ra_sector - requested_sector_end;
1265
1266         if(how_far_ahead <= max_ra)
1267           ra_count = (max_ra - how_far_ahead + 1 ? max_ra - how_far_ahead + 1 : speedmult_ra);
1268         else
1269           ra_count++;
1270       } else if (requested_sector_end != last_read_sector) {
1271         ra_sector = requested_sector_end;
1272         ra_count = initial_ra;
1273       }
1274
1275       last_read_sector = requested_sector_end;
1276     }
1277
1278     index = ra_sector % SECTOR_BUFFER_SIZE;
1279
1280     // check for end of CD
1281     if (ra_count && ra_sector >= max_sector) {
1282       ra_count = 0;
1283       pthread_mutex_lock(&sectorbuffer_lock);
1284       sectorbuffer[index].ret = -1;
1285       sectorbuffer[index].sector = ra_sector;
1286       pthread_cond_signal(&sectorbuffer_cond);
1287       pthread_mutex_unlock(&sectorbuffer_lock);
1288     }
1289
1290     if (ra_count) {
1291       pthread_mutex_lock(&sectorbuffer_lock);
1292       if (sectorbuffer[index].sector != ra_sector) {
1293         pthread_mutex_unlock(&sectorbuffer_lock);
1294
1295         ret = sync_cdimg_read_func(cdHandle, 0, tmpdata, ra_sector);
1296
1297         pthread_mutex_lock(&sectorbuffer_lock);
1298         sectorbuffer[index].ret = ret;
1299         sectorbuffer[index].sector = ra_sector;
1300         memcpy(sectorbuffer[index].data, tmpdata, CD_FRAMESIZE_RAW);
1301       }
1302       pthread_cond_signal(&sectorbuffer_cond);
1303       pthread_mutex_unlock(&sectorbuffer_lock);
1304
1305       ra_sector++;
1306       ra_count--;
1307     }
1308   }
1309
1310   return NULL;
1311 }
1312
1313 static void readThreadStop() {
1314   if (read_thread_running == TRUE) {
1315     read_thread_running = FALSE;
1316     pthread_cond_signal(&read_thread_msg_avail);
1317     pthread_join(read_thread_id, NULL);
1318   }
1319
1320   pthread_cond_destroy(&read_thread_msg_done);
1321   pthread_cond_destroy(&read_thread_msg_avail);
1322   pthread_mutex_destroy(&read_thread_msg_lock);
1323
1324   pthread_cond_destroy(&sectorbuffer_cond);
1325   pthread_mutex_destroy(&sectorbuffer_lock);
1326
1327   CDR_getBuffer = sync_CDR_getBuffer;
1328   cdimg_read_func = sync_cdimg_read_func;
1329
1330   free(sectorbuffer);
1331   sectorbuffer = NULL;
1332 }
1333
1334 static void readThreadStart() {
1335   SysPrintf("Starting async CD thread\n");
1336
1337   if (read_thread_running == TRUE)
1338     return;
1339
1340   read_thread_running = TRUE;
1341   read_thread_sector_start = -1;
1342   read_thread_sector_end = -1;
1343   sectorbuffer_index = 0;
1344
1345   sectorbuffer = calloc(SECTOR_BUFFER_SIZE, sizeof(SectorBufferEntry));
1346   if(!sectorbuffer)
1347     goto error;
1348
1349   sectorbuffer[0].sector = -1; // Otherwise we might think we've already fetched sector 0!
1350
1351   sync_CDR_getBuffer = CDR_getBuffer;
1352   CDR_getBuffer = ISOgetBuffer_async;
1353   sync_cdimg_read_func = cdimg_read_func;
1354   cdimg_read_func = cdread_async;
1355
1356   if (pthread_cond_init(&read_thread_msg_avail, NULL) ||
1357       pthread_cond_init(&read_thread_msg_done, NULL) ||
1358       pthread_mutex_init(&read_thread_msg_lock, NULL) ||
1359       pthread_cond_init(&sectorbuffer_cond, NULL) ||
1360       pthread_mutex_init(&sectorbuffer_lock, NULL) ||
1361       pthread_create(&read_thread_id, NULL, readThreadMain, NULL))
1362     goto error;
1363
1364   return;
1365
1366  error:
1367   SysPrintf("Error starting async CD thread\n");
1368   SysPrintf("Falling back to sync\n");
1369
1370   readThreadStop();
1371 }
1372 #endif
1373
1374 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1375 {
1376         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1377         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1378 }
1379
1380 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1381 {
1382         int ret;
1383
1384         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1385         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1386         fread(subbuffer, 1, SUB_FRAMESIZE, f);
1387
1388         if (subChanRaw) DecodeRawSubData();
1389
1390         return ret;
1391 }
1392
1393 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1394 {
1395         static z_stream z;
1396         int ret = 0;
1397
1398         if (z.zalloc == NULL) {
1399                 // XXX: one-time leak here..
1400                 z.next_in = Z_NULL;
1401                 z.avail_in = 0;
1402                 z.zalloc = Z_NULL;
1403                 z.zfree = Z_NULL;
1404                 z.opaque = Z_NULL;
1405                 ret = inflateInit2(&z, -15);
1406         }
1407         else
1408                 ret = inflateReset(&z);
1409         if (ret != Z_OK)
1410                 return ret;
1411
1412         z.next_in = in;
1413         z.avail_in = in_size;
1414         z.next_out = out;
1415         z.avail_out = *out_size;
1416
1417         ret = inflate(&z, Z_NO_FLUSH);
1418         //inflateEnd(&z);
1419
1420         *out_size -= z.avail_out;
1421         return ret == 1 ? 0 : ret;
1422 }
1423
1424 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1425 {
1426         unsigned long cdbuffer_size, cdbuffer_size_expect;
1427         unsigned int size;
1428         int is_compressed;
1429         off_t start_byte;
1430         int ret, block;
1431
1432         if (base)
1433                 sector += base / 2352;
1434
1435         block = sector >> compr_img->block_shift;
1436         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1437
1438         if (block == compr_img->current_block) {
1439                 //printf("hit sect %d\n", sector);
1440                 goto finish;
1441         }
1442
1443         if (sector >= compr_img->index_len * 16) {
1444                 SysPrintf("sector %d is past img end\n", sector);
1445                 return -1;
1446         }
1447
1448         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1449         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1450                 SysPrintf("seek error for block %d at %llx: ",
1451                         block, (long long)start_byte);
1452                 perror(NULL);
1453                 return -1;
1454         }
1455
1456         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1457         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1458         if (size > sizeof(compr_img->buff_compressed)) {
1459                 SysPrintf("block %d is too large: %u\n", block, size);
1460                 return -1;
1461         }
1462
1463         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1464                                 1, size, cdHandle) != size) {
1465                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1466                 perror(NULL);
1467                 return -1;
1468         }
1469
1470         if (is_compressed) {
1471                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1472                 cdbuffer_size = cdbuffer_size_expect;
1473                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1474                 if (ret != 0) {
1475                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1476                                         ret, block, sector);
1477                         return -1;
1478                 }
1479                 if (cdbuffer_size != cdbuffer_size_expect)
1480                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1481                                         cdbuffer_size_expect, sector);
1482         }
1483
1484         // done at last!
1485         compr_img->current_block = block;
1486
1487 finish:
1488         if (dest != cdbuffer) // copy avoid HACK
1489                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1490                         CD_FRAMESIZE_RAW);
1491         return CD_FRAMESIZE_RAW;
1492 }
1493
1494 #ifdef HAVE_CHD
1495 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1496 {
1497         int hunk;
1498
1499         if (base)
1500                 sector += base;
1501
1502         hunk = sector / chd_img->sectors_per_hunk;
1503         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1504
1505         if (hunk != chd_img->current_hunk)
1506         {
1507                 chd_read(chd_img->chd, hunk, chd_img->buffer);
1508                 chd_img->current_hunk = hunk;
1509         }
1510
1511         if (dest != cdbuffer) // copy avoid HACK
1512                 memcpy(dest, chd_img->buffer[chd_img->sector_in_hunk],
1513                         CD_FRAMESIZE_RAW);
1514         return CD_FRAMESIZE_RAW;
1515 }
1516 #endif
1517 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1518 {
1519         int ret;
1520
1521         fseek(f, base + sector * 2048, SEEK_SET);
1522         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1523
1524         // not really necessary, fake mode 2 header
1525         memset(cdbuffer, 0, 12 * 2);
1526         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1527         cdbuffer[12 + 3] = 1;
1528
1529         return ret;
1530 }
1531
1532 #ifndef _WIN32
1533
1534 static int cdread_async(FILE *f, unsigned int base, void *dest, int sector) {
1535   boolean found = FALSE;
1536   int i = sector % SECTOR_BUFFER_SIZE;
1537   long ret;
1538
1539   if (f != cdHandle || base != 0 || dest != cdbuffer) {
1540     // Async reads are only supported for cdbuffer, so call the sync
1541     // function directly.
1542     return sync_cdimg_read_func(f, base, dest, sector);
1543   }
1544
1545   pthread_mutex_lock(&read_thread_msg_lock);
1546
1547   // Only wait if we're not trying to read the next sector and
1548   // sector_start is set (meaning the last request hasn't been
1549   // processed yet)
1550   while(read_thread_sector_start != -1 && read_thread_sector_end + 1 != sector) {
1551     pthread_cond_wait(&read_thread_msg_done, &read_thread_msg_lock);
1552   }
1553
1554   if (read_thread_sector_start == -1)
1555     read_thread_sector_start = sector;
1556
1557   read_thread_sector_end = sector;
1558   pthread_cond_signal(&read_thread_msg_avail);
1559   pthread_mutex_unlock(&read_thread_msg_lock);
1560
1561   do {
1562     pthread_mutex_lock(&sectorbuffer_lock);
1563     if (sectorbuffer[i].sector == sector) {
1564       sectorbuffer_index = i;
1565       ret = sectorbuffer[i].ret;
1566       found = TRUE;
1567     }
1568
1569     if (!found) {
1570       pthread_cond_wait(&sectorbuffer_cond, &sectorbuffer_lock);
1571     }
1572     pthread_mutex_unlock(&sectorbuffer_lock);
1573   } while (!found);
1574
1575   return ret;
1576 }
1577
1578 #endif
1579
1580 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1581         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1582 }
1583
1584 #ifdef HAVE_CHD
1585 static unsigned char * CALLBACK ISOgetBuffer_chd(void) {
1586         return chd_img->buffer[chd_img->sector_in_hunk] + 12;
1587 }
1588 #endif
1589
1590 #ifndef _WIN32
1591 static unsigned char * CALLBACK ISOgetBuffer_async(void) {
1592   unsigned char *buffer;
1593   pthread_mutex_lock(&sectorbuffer_lock);
1594   buffer = sectorbuffer[sectorbuffer_index].data;
1595   pthread_mutex_unlock(&sectorbuffer_lock);
1596   return buffer + 12;
1597 }
1598
1599 #endif
1600
1601 static unsigned char * CALLBACK ISOgetBuffer(void) {
1602         return cdbuffer + 12;
1603 }
1604
1605 static void PrintTracks(void) {
1606         int i;
1607
1608         for (i = 1; i <= numtracks; i++) {
1609                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1610                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1611                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1612                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1613         }
1614 }
1615
1616 // This function is invoked by the front-end when opening an ISO
1617 // file for playback
1618 static long CALLBACK ISOopen(void) {
1619         boolean isMode1ISO = FALSE;
1620         char alt_bin_filename[MAXPATHLEN];
1621         const char *bin_filename;
1622         char image_str[1024] = {0};
1623
1624         if (cdHandle != NULL) {
1625                 return 0; // it's already open
1626         }
1627
1628         cdHandle = fopen_utf8(GetIsoFile(), "rb");
1629         if (cdHandle == NULL) {
1630                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1631                         GetIsoFile(), strerror(errno));
1632                 return -1;
1633         }
1634
1635         sprintf(image_str, "Loaded CD Image: %s", GetIsoFile());
1636
1637         cddaBigEndian = FALSE;
1638         subChanMixed = FALSE;
1639         subChanRaw = FALSE;
1640         pregapOffset = 0;
1641         cdrIsoMultidiskCount = 1;
1642         multifile = 0;
1643
1644         CDR_getBuffer = ISOgetBuffer;
1645         cdimg_read_func = cdread_normal;
1646
1647         if (parsetoc(GetIsoFile()) == 0) {
1648                 strcat(image_str, "[+toc]");
1649         }
1650         else if (parseccd(GetIsoFile()) == 0) {
1651                 strcat(image_str, "[+ccd]");
1652         }
1653         else if (parsemds(GetIsoFile()) == 0) {
1654                 strcat(image_str, "[+mds]");
1655         }
1656         else if (parsecue(GetIsoFile()) == 0) {
1657                 strcat(image_str, "[+cue]");
1658         }
1659         if (handlepbp(GetIsoFile()) == 0) {
1660                 strcat(image_str, "[+pbp]");
1661                 CDR_getBuffer = ISOgetBuffer_compr;
1662                 cdimg_read_func = cdread_compressed;
1663         }
1664         else if (handlecbin(GetIsoFile()) == 0) {
1665                 strcat(image_str, "[+cbin]");
1666                 CDR_getBuffer = ISOgetBuffer_compr;
1667                 cdimg_read_func = cdread_compressed;
1668         }
1669 #ifdef HAVE_CHD
1670         else if (handlechd(GetIsoFile()) == 0) {
1671                 strcat(image_str, "[+chd]");
1672                 CDR_getBuffer = ISOgetBuffer_chd;
1673                 cdimg_read_func = cdread_chd;
1674         }
1675 #endif
1676
1677         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1678                 strcat(image_str, "[+sub]");
1679         }
1680         if (opensbifile(GetIsoFile()) == 0) {
1681                 strcat(image_str, "[+sbi]");
1682         }
1683
1684         fseeko(cdHandle, 0, SEEK_END);
1685
1686         // maybe user selected metadata file instead of main .bin ..
1687         bin_filename = GetIsoFile();
1688         if (ftello(cdHandle) < 2352 * 0x10) {
1689                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1690                 FILE *tmpf = NULL;
1691                 size_t i;
1692                 char *p;
1693
1694                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1695                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1696                 if (strlen(alt_bin_filename) >= 4) {
1697                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1698                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1699                                 strcpy(p, exts[i]);
1700                                 tmpf = fopen_utf8(alt_bin_filename, "rb");
1701                                 if (tmpf != NULL)
1702                                         break;
1703                         }
1704                 }
1705                 if (tmpf != NULL) {
1706                         bin_filename = alt_bin_filename;
1707                         fclose(cdHandle);
1708                         cdHandle = tmpf;
1709                         fseeko(cdHandle, 0, SEEK_END);
1710                 }
1711         }
1712
1713         // guess whether it is mode1/2048
1714         if (ftello(cdHandle) % 2048 == 0) {
1715                 unsigned int modeTest = 0;
1716                 fseek(cdHandle, 0, SEEK_SET);
1717                 fread(&modeTest, 4, 1, cdHandle);
1718                 if (SWAP32(modeTest) != 0xffffff00) {
1719                         strcat(image_str, "[2048]");
1720                         isMode1ISO = TRUE;
1721                 }
1722         }
1723         fseek(cdHandle, 0, SEEK_SET);
1724
1725         SysPrintf("%s.\n", image_str);
1726
1727         PrintTracks();
1728
1729         if (subChanMixed)
1730                 cdimg_read_func = cdread_sub_mixed;
1731         else if (isMode1ISO)
1732                 cdimg_read_func = cdread_2048;
1733
1734         // make sure we have another handle open for cdda
1735         if (numtracks > 1 && ti[1].handle == NULL) {
1736                 ti[1].handle = fopen_utf8(bin_filename, "rb");
1737         }
1738         cdda_cur_sector = 0;
1739         cdda_file_offset = 0;
1740
1741   if (Config.AsyncCD) {
1742     readThreadStart();
1743   }
1744         return 0;
1745 }
1746
1747 static long CALLBACK ISOclose(void) {
1748         int i;
1749
1750         if (cdHandle != NULL) {
1751                 fclose(cdHandle);
1752                 cdHandle = NULL;
1753         }
1754         if (subHandle != NULL) {
1755                 fclose(subHandle);
1756                 subHandle = NULL;
1757         }
1758         stopCDDA();
1759         cddaHandle = NULL;
1760
1761         if (compr_img != NULL) {
1762                 free(compr_img->index_table);
1763                 free(compr_img);
1764                 compr_img = NULL;
1765         }
1766
1767 #ifdef HAVE_CHD
1768         if (chd_img != NULL) {
1769                 chd_close(chd_img->chd);
1770                 free(chd_img->buffer);
1771                 free(chd_img);
1772                 chd_img = NULL;
1773         }
1774 #endif
1775
1776         for (i = 1; i <= numtracks; i++) {
1777                 if (ti[i].handle != NULL) {
1778                         fclose(ti[i].handle);
1779                         ti[i].handle = NULL;
1780                 }
1781         }
1782         numtracks = 0;
1783         ti[1].type = 0;
1784         UnloadSBI();
1785
1786         memset(cdbuffer, 0, sizeof(cdbuffer));
1787         CDR_getBuffer = ISOgetBuffer;
1788
1789         if (Config.AsyncCD) {
1790                 readThreadStop();
1791         }
1792
1793         return 0;
1794 }
1795
1796 static long CALLBACK ISOinit(void) {
1797         assert(cdHandle == NULL);
1798         assert(subHandle == NULL);
1799
1800         return 0; // do nothing
1801 }
1802
1803 static long CALLBACK ISOshutdown(void) {
1804         ISOclose();
1805         return 0;
1806 }
1807
1808 // return Starting and Ending Track
1809 // buffer:
1810 //  byte 0 - start track
1811 //  byte 1 - end track
1812 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1813         buffer[0] = 1;
1814
1815         if (numtracks > 0) {
1816                 buffer[1] = numtracks;
1817         }
1818         else {
1819                 buffer[1] = 1;
1820         }
1821
1822         return 0;
1823 }
1824
1825 // return Track Time
1826 // buffer:
1827 //  byte 0 - frame
1828 //  byte 1 - second
1829 //  byte 2 - minute
1830 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1831         if (track == 0) {
1832                 unsigned int sect;
1833                 unsigned char time[3];
1834                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1835                 sec2msf(sect, (char *)time);
1836                 buffer[2] = time[0];
1837                 buffer[1] = time[1];
1838                 buffer[0] = time[2];
1839         }
1840         else if (numtracks > 0 && track <= numtracks) {
1841                 buffer[2] = ti[track].start[0];
1842                 buffer[1] = ti[track].start[1];
1843                 buffer[0] = ti[track].start[2];
1844         }
1845         else {
1846                 buffer[2] = 0;
1847                 buffer[1] = 2;
1848                 buffer[0] = 0;
1849         }
1850
1851         return 0;
1852 }
1853
1854 // decode 'raw' subchannel data ripped by cdrdao
1855 static void DecodeRawSubData(void) {
1856         unsigned char subQData[12];
1857         int i;
1858
1859         memset(subQData, 0, sizeof(subQData));
1860
1861         for (i = 0; i < 8 * 12; i++) {
1862                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1863                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1864                 }
1865         }
1866
1867         memcpy(&subbuffer[12], subQData, 12);
1868 }
1869
1870 // read track
1871 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1872 // uses bcd format
1873 static long CALLBACK ISOreadTrack(unsigned char *time) {
1874         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1875         long ret;
1876
1877         if (cdHandle == NULL) {
1878                 return -1;
1879         }
1880
1881         if (pregapOffset) {
1882                 subChanMissing = FALSE;
1883                 if (sector >= pregapOffset) {
1884                         sector -= 2 * 75;
1885                         if (sector < pregapOffset)
1886                                 subChanMissing = TRUE;
1887                 }
1888         }
1889
1890         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1891         if (ret < 0)
1892                 return -1;
1893
1894         if (subHandle != NULL) {
1895                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1896                 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1897
1898                 if (subChanRaw) DecodeRawSubData();
1899         }
1900
1901         return 0;
1902 }
1903
1904 // plays cdda audio
1905 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1906 // does NOT uses bcd format
1907 static long CALLBACK ISOplay(unsigned char *time) {
1908         unsigned int i;
1909
1910         if (numtracks <= 1)
1911                 return 0;
1912
1913         // find the track
1914         cdda_cur_sector = msf2sec((char *)time);
1915         for (i = numtracks; i > 1; i--) {
1916                 cdda_first_sector = msf2sec(ti[i].start);
1917                 if (cdda_first_sector <= cdda_cur_sector + 2 * 75)
1918                         break;
1919         }
1920         cdda_file_offset = ti[i].start_offset;
1921
1922         // find the file that contains this track
1923         for (; i > 1; i--)
1924                 if (ti[i].handle != NULL)
1925                         break;
1926
1927         cddaHandle = ti[i].handle;
1928
1929         if (SPU_playCDDAchannel != NULL)
1930                 startCDDA();
1931
1932         return 0;
1933 }
1934
1935 // stops cdda audio
1936 static long CALLBACK ISOstop(void) {
1937         stopCDDA();
1938         return 0;
1939 }
1940
1941 // gets subchannel data
1942 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1943         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1944                 return subbuffer;
1945         }
1946
1947         return NULL;
1948 }
1949
1950 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1951         u32 sect;
1952
1953         CDR__getStatus(stat);
1954
1955         if (playing) {
1956                 stat->Type = 0x02;
1957                 stat->Status |= 0x80;
1958         }
1959         else {
1960                 // BIOS - boot ID (CD type)
1961                 stat->Type = ti[1].type;
1962         }
1963
1964         // relative -> absolute time
1965         sect = cddaCurPos;
1966         sec2msf(sect, (char *)stat->Time);
1967
1968         return 0;
1969 }
1970
1971 // read CDDA sector into buffer
1972 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1973         unsigned char msf[3] = {m, s, f};
1974         unsigned int file, track, track_start = 0;
1975         int ret;
1976
1977         cddaCurPos = msf2sec((char *)msf);
1978
1979         // find current track index
1980         for (track = numtracks; ; track--) {
1981                 track_start = msf2sec(ti[track].start);
1982                 if (track_start <= cddaCurPos)
1983                         break;
1984                 if (track == 1)
1985                         break;
1986         }
1987
1988         // data tracks play silent
1989         if (ti[track].type != CDDA) {
1990                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1991                 return 0;
1992         }
1993
1994         file = 1;
1995         if (multifile) {
1996                 // find the file that contains this track
1997                 for (file = track; file > 1; file--)
1998                         if (ti[file].handle != NULL)
1999                                 break;
2000         }
2001
2002         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
2003                 buffer, cddaCurPos - track_start);
2004         if (ret != CD_FRAMESIZE_RAW) {
2005                 memset(buffer, 0, CD_FRAMESIZE_RAW);
2006                 return -1;
2007         }
2008
2009         if (cddaBigEndian) {
2010                 int i;
2011                 unsigned char tmp;
2012
2013                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
2014                         tmp = buffer[i * 2];
2015                         buffer[i * 2] = buffer[i * 2 + 1];
2016                         buffer[i * 2 + 1] = tmp;
2017                 }
2018         }
2019
2020         return 0;
2021 }
2022
2023 void cdrIsoInit(void) {
2024         CDR_init = ISOinit;
2025         CDR_shutdown = ISOshutdown;
2026         CDR_open = ISOopen;
2027         CDR_close = ISOclose;
2028         CDR_getTN = ISOgetTN;
2029         CDR_getTD = ISOgetTD;
2030         CDR_readTrack = ISOreadTrack;
2031         CDR_getBuffer = ISOgetBuffer;
2032         CDR_play = ISOplay;
2033         CDR_stop = ISOstop;
2034         CDR_getBufferSub = ISOgetBufferSub;
2035         CDR_getStatus = ISOgetStatus;
2036         CDR_readCDDA = ISOreadCDDA;
2037
2038         CDR_getDriveLetter = CDR__getDriveLetter;
2039         CDR_configure = CDR__configure;
2040         CDR_test = CDR__test;
2041         CDR_about = CDR__about;
2042         CDR_setfilename = CDR__setfilename;
2043
2044         numtracks = 0;
2045 }
2046
2047 int cdrIsoActive(void) {
2048         return (cdHandle != NULL);
2049 }