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cdrom: Fix PBP support on big-endian platforms
[pcsx_rearmed.git] / libpcsxcore / cdriso.c
CommitLineData
ef79bbde
P		 1/***************************************************************************
2 * Copyright (C) 2007 PCSX-df Team *
3 * Copyright (C) 2009 Wei Mingzhi *
77160d47 4 * Copyright (C) 2012 notaz *
ef79bbde
P		 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., *
deebc67f 19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
ef79bbde
P		 20 ***************************************************************************/
21
22#include "psxcommon.h"
23#include "plugins.h"
24#include "cdrom.h"
25#include "cdriso.h"
ae4e7dc9 26#include "ppf.h"
ef79bbde 27
f9fb1cf7 28#include <errno.h>
29#include <zlib.h>
b0ec2e6d 30#ifdef HAVE_CHD
ce188d4d 31#include <chd.h>
b0ec2e6d 32#endif
f9fb1cf7 33
ef79bbde 34#ifdef _WIN32
003cfc63 35#define WIN32_LEAN_AND_MEAN
ef79bbde
P		 36#include <process.h>
37#include <windows.h>
deebc67f 38#define strcasecmp _stricmp
ef79bbde
P		 39#else
40#include <pthread.h>
41#include <sys/time.h>
349f7d81 42#include <unistd.h>
ef79bbde
P		 43#endif
44
226a5691 45#ifdef USE_LIBRETRO_VFS
46#include <streams/file_stream_transforms.h>
47#undef fseeko
48#undef ftello
49#define ftello rftell
50#define fseeko rfseek
51#endif
9361a5aa 52
cc376814 53#define OFF_T_MSB ((off_t)1 << (sizeof(off_t) * 8 - 1))
54
0c2871a7 55unsigned int cdrIsoMultidiskCount;
56unsigned int cdrIsoMultidiskSelect;
57
ef79bbde
P		 58static FILE *cdHandle = NULL;
59static FILE *cddaHandle = NULL;
60static FILE *subHandle = NULL;
61
62static boolean subChanMixed = FALSE;
63static boolean subChanRaw = FALSE;
8aa91443 64static boolean subChanMissing = FALSE;
ef79bbde 65
deebc67f 66static boolean multifile = FALSE;
67
81abe4d5 68static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
ef79bbde
P		 69static unsigned char subbuffer[SUB_FRAMESIZE];
70
38b8102c 71static boolean playing = FALSE;
ef79bbde 72static boolean cddaBigEndian = FALSE;
77160d47 73// cdda sectors in toc, byte offset in file
9a92bffb 74static unsigned int cdda_cur_sector;
77160d47 75static unsigned int cdda_file_offset;
8aa91443 76/* Frame offset into CD image where pregap data would be found if it was there.
77 * If a game seeks there we must *not* return subchannel data since it's
78 * not in the CD image, so that cdrom code can fake subchannel data instead.
79 * XXX: there could be multiple pregaps but PSX dumps only have one? */
80static unsigned int pregapOffset;
ef79bbde 81
deebc67f 82#define cddaCurPos cdda_cur_sector
83
9a92bffb 84// compressed image stuff
85static struct {
86 unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
87 unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
cc376814 88 off_t *index_table;
9a92bffb 89 unsigned int index_len;
0877957a 90 unsigned int block_shift;
9a92bffb 91 unsigned int current_block;
92 unsigned int sector_in_blk;
93} *compr_img;
94
b0ec2e6d 95#ifdef HAVE_CHD
ce188d4d 96static struct {
97 unsigned char (*buffer)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE];
98 chd_file* chd;
99 const chd_header* header;
100 unsigned int sectors_per_hunk;
101 unsigned int current_hunk;
102 unsigned int sector_in_hunk;
103} *chd_img;
b0ec2e6d 104#endif
ce188d4d 105
77160d47 106int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
9a92bffb 107
ef79bbde
P		 108char* CALLBACK CDR__getDriveLetter(void);
109long CALLBACK CDR__configure(void);
110long CALLBACK CDR__test(void);
111void CALLBACK CDR__about(void);
112long CALLBACK CDR__setfilename(char *filename);
113long CALLBACK CDR__getStatus(struct CdrStat *stat);
114
19c03d80 115static void DecodeRawSubData(void);
116
ef79bbde 117struct trackinfo {
deebc67f 118 enum {DATA=1, CDDA} type;
ef79bbde
P		 119 char start[3]; // MSF-format
120 char length[3]; // MSF-format
38b8102c 121 FILE *handle; // for multi-track images CDDA
77160d47 122 unsigned int start_offset; // byte offset from start of above file
ef79bbde
P		 123};
124
125#define MAXTRACKS 100 /* How many tracks can a CD hold? */
126
127static int numtracks = 0;
128static struct trackinfo ti[MAXTRACKS];
129
130// get a sector from a msf-array
131static unsigned int msf2sec(char *msf) {
132 return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
133}
134
135static void sec2msf(unsigned int s, char *msf) {
136 msf[0] = s / 75 / 60;
137 s = s - msf[0] * 75 * 60;
138 msf[1] = s / 75;
139 s = s - msf[1] * 75;
140 msf[2] = s;
141}
142
143// divide a string of xx:yy:zz into m, s, f
144static void tok2msf(char *time, char *msf) {
145 char *token;
146
147 token = strtok(time, ":");
148 if (token) {
149 msf[0] = atoi(token);
150 }
151 else {
152 msf[0] = 0;
153 }
154
155 token = strtok(NULL, ":");
156 if (token) {
157 msf[1] = atoi(token);
158 }
159 else {
160 msf[1] = 0;
161 }
162
163 token = strtok(NULL, ":");
164 if (token) {
165 msf[2] = atoi(token);
166 }
167 else {
168 msf[2] = 0;
169 }
170}
171
ef79bbde
P		 172// this function tries to get the .toc file of the given .bin
173// the necessary data is put into the ti (trackinformation)-array
174static int parsetoc(const char *isofile) {
175 char tocname[MAXPATHLEN];
176 FILE *fi;
e999be41 177 char linebuf[256], tmp[256], name[256];
ef79bbde
P		 178 char *token;
179 char time[20], time2[20];
e999be41 180 unsigned int t, sector_offs, sector_size;
181 unsigned int current_zero_gap = 0;
ef79bbde
P		 182
183 numtracks = 0;
184
185 // copy name of the iso and change extension from .bin to .toc
186 strncpy(tocname, isofile, sizeof(tocname));
187 tocname[MAXPATHLEN - 1] = '\0';
188 if (strlen(tocname) >= 4) {
189 strcpy(tocname + strlen(tocname) - 4, ".toc");
190 }
191 else {
192 return -1;
193 }
194
226a5691 195 if ((fi = fopen(tocname, "r")) == NULL) {
ef79bbde
P		 196 // try changing extension to .cue (to satisfy some stupid tutorials)
197 strcpy(tocname + strlen(tocname) - 4, ".cue");
226a5691 198 if ((fi = fopen(tocname, "r")) == NULL) {
ef79bbde
P		 199 // if filename is image.toc.bin, try removing .bin (for Brasero)
200 strcpy(tocname, isofile);
201 t = strlen(tocname);
202 if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
203 tocname[t - 4] = '\0';
226a5691 204 if ((fi = fopen(tocname, "r")) == NULL) {
ef79bbde
P		 205 return -1;
206 }
207 }
208 else {
209 return -1;
210 }
211 }
92f43ab0 212 // check if it's really a TOC named as a .cue
9361a5aa
EC		 213 if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
214 token = strtok(linebuf, " ");
215 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
216 fclose(fi);
217 return -1;
218 }
92f43ab0 219 }
220 fseek(fi, 0, SEEK_SET);
ef79bbde
P		 221 }
222
223 memset(&ti, 0, sizeof(ti));
224 cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
225
e999be41 226 sector_size = CD_FRAMESIZE_RAW;
19c03d80 227 sector_offs = 2 * 75;
228
ef79bbde
P		 229 // parse the .toc file
230 while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
231 // search for tracks
e999be41 232 strncpy(tmp, linebuf, sizeof(linebuf));
233 token = strtok(tmp, " ");
ef79bbde
P		 234
235 if (token == NULL) continue;
236
237 if (!strcmp(token, "TRACK")) {
e999be41 238 sector_offs += current_zero_gap;
239 current_zero_gap = 0;
240
ef79bbde
P		 241 // get type of track
242 token = strtok(NULL, " ");
243 numtracks++;
244
245 if (!strncmp(token, "MODE2_RAW", 9)) {
246 ti[numtracks].type = DATA;
247 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
248
249 // check if this image contains mixed subchannel data
250 token = strtok(NULL, " ");
e999be41 251 if (token != NULL && !strncmp(token, "RW", 2)) {
252 sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
ef79bbde 253 subChanMixed = TRUE;
e999be41 254 if (!strncmp(token, "RW_RAW", 6))
255 subChanRaw = TRUE;
ef79bbde
P		 256 }
257 }
258 else if (!strncmp(token, "AUDIO", 5)) {
259 ti[numtracks].type = CDDA;
260 }
261 }
262 else if (!strcmp(token, "DATAFILE")) {
263 if (ti[numtracks].type == CDDA) {
264 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
19c03d80 265 ti[numtracks].start_offset = t;
e999be41 266 t = t / sector_size + sector_offs;
ef79bbde
P		 267 sec2msf(t, (char *)&ti[numtracks].start);
268 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
269 }
270 else {
271 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
272 tok2msf((char *)&time, (char *)&ti[numtracks].length);
273 }
274 }
275 else if (!strcmp(token, "FILE")) {
276 sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
277 tok2msf((char *)&time, (char *)&ti[numtracks].start);
e999be41 278 t += msf2sec(ti[numtracks].start) * sector_size;
19c03d80 279 ti[numtracks].start_offset = t;
e999be41 280 t = t / sector_size + sector_offs;
ef79bbde
P		 281 sec2msf(t, (char *)&ti[numtracks].start);
282 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
283 }
e999be41 284 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
285 // skip unneeded optional fields
286 while (token != NULL) {
287 token = strtok(NULL, " ");
288 if (strchr(token, ':') != NULL)
289 break;
290 }
291 if (token != NULL) {
292 tok2msf(token, tmp);
293 current_zero_gap = msf2sec(tmp);
294 }
8aa91443 295 if (numtracks > 1) {
296 t = ti[numtracks - 1].start_offset;
e999be41 297 t /= sector_size;
8aa91443 298 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
299 }
19c03d80 300 }
e999be41 301 else if (!strcmp(token, "START")) {
302 token = strtok(NULL, " ");
303 if (token != NULL && strchr(token, ':')) {
304 tok2msf(token, tmp);
305 t = msf2sec(tmp);
306 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
307 t = msf2sec(ti[numtracks].start) + t;
308 sec2msf(t, (char *)&ti[numtracks].start);
309 }
310 }
ef79bbde
P		 311 }
312
313 fclose(fi);
314
315 return 0;
316}
317
318// this function tries to get the .cue file of the given .bin
319// the necessary data is put into the ti (trackinformation)-array
320static int parsecue(const char *isofile) {
321 char cuename[MAXPATHLEN];
38b8102c 322 char filepath[MAXPATHLEN];
323 char *incue_fname;
ef79bbde
P		 324 FILE *fi;
325 char *token;
326 char time[20];
327 char *tmp;
19c03d80 328 char linebuf[256], tmpb[256], dummy[256];
38b8102c 329 unsigned int incue_max_len;
77160d47 330 unsigned int t, file_len, mode, sector_offs;
331 unsigned int sector_size = 2352;
ef79bbde
P		 332
333 numtracks = 0;
334
335 // copy name of the iso and change extension from .bin to .cue
336 strncpy(cuename, isofile, sizeof(cuename));
337 cuename[MAXPATHLEN - 1] = '\0';
338 if (strlen(cuename) >= 4) {
2cc221eb 339 // If 'isofile' is a '.cd<X>' file, use it as a .cue file
340 // and don't try to search the additional .cue file
341 if (strncasecmp(cuename + strlen(cuename) - 4, ".cd", 3) != 0 )
342 strcpy(cuename + strlen(cuename) - 4, ".cue");
ef79bbde
P		 343 }
344 else {
345 return -1;
346 }
347
226a5691 348 if ((fi = fopen(cuename, "r")) == NULL) {
ef79bbde
P		 349 return -1;
350 }
351
352 // Some stupid tutorials wrongly tell users to use cdrdao to rip a
353 // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
354 // that...
355 if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
356 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
357 // Don't proceed further, as this is actually a .toc file rather
358 // than a .cue file.
359 fclose(fi);
360 return parsetoc(isofile);
361 }
362 fseek(fi, 0, SEEK_SET);
363 }
364
38b8102c 365 // build a path for files referenced in .cue
366 strncpy(filepath, cuename, sizeof(filepath));
22bbabf6 367 tmp = strrchr(filepath, '/');
38b8102c 368 if (tmp == NULL)
22bbabf6 369 tmp = strrchr(filepath, '\\');
370 if (tmp != NULL)
371 tmp++;
372 else
38b8102c 373 tmp = filepath;
374 *tmp = 0;
375 filepath[sizeof(filepath) - 1] = 0;
376 incue_fname = tmp;
377 incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
378
ef79bbde
P		 379 memset(&ti, 0, sizeof(ti));
380
19c03d80 381 file_len = 0;
382 sector_offs = 2 * 75;
383
ef79bbde
P		 384 while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
385 strncpy(dummy, linebuf, sizeof(linebuf));
386 token = strtok(dummy, " ");
387
388 if (token == NULL) {
389 continue;
390 }
391
19c03d80 392 if (!strcmp(token, "TRACK")) {
ef79bbde
P		 393 numtracks++;
394
77160d47 395 sector_size = 0;
ef79bbde
P		 396 if (strstr(linebuf, "AUDIO") != NULL) {
397 ti[numtracks].type = CDDA;
77160d47 398 sector_size = 2352;
ef79bbde 399 }
77160d47 400 else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
ef79bbde 401 ti[numtracks].type = DATA;
77160d47 402 else {
403 SysPrintf(".cue: failed to parse TRACK\n");
404 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
ef79bbde 405 }
77160d47 406 if (sector_size == 0)
407 sector_size = 2352;
ef79bbde
P		 408 }
409 else if (!strcmp(token, "INDEX")) {
77160d47 410 if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
411 SysPrintf(".cue: failed to parse INDEX\n");
19c03d80 412 tok2msf(time, (char *)&ti[numtracks].start);
ef79bbde 413
19c03d80 414 t = msf2sec(ti[numtracks].start);
77160d47 415 ti[numtracks].start_offset = t * sector_size;
19c03d80 416 t += sector_offs;
ef79bbde 417 sec2msf(t, ti[numtracks].start);
19c03d80 418
419 // default track length to file length
77160d47 420 t = file_len - ti[numtracks].start_offset / sector_size;
19c03d80 421 sec2msf(t, ti[numtracks].length);
422
423 if (numtracks > 1 && ti[numtracks].handle == NULL) {
424 // this track uses the same file as the last,
425 // start of this track is last track's end
426 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
427 sec2msf(t, ti[numtracks - 1].length);
38b8102c 428 }
8aa91443 429 if (numtracks > 1 && pregapOffset == -1)
77160d47 430 pregapOffset = ti[numtracks].start_offset / sector_size;
19c03d80 431 }
432 else if (!strcmp(token, "PREGAP")) {
433 if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
434 tok2msf(time, dummy);
435 sector_offs += msf2sec(dummy);
38b8102c 436 }
8aa91443 437 pregapOffset = -1; // mark to fill track start_offset
19c03d80 438 }
439 else if (!strcmp(token, "FILE")) {
9a9bcd78 440 t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
385c023b 441 if (t != 1)
9a9bcd78 442 sscanf(linebuf, " FILE %255s", tmpb);
19c03d80 443
6f4557bf 444 tmp = strrchr(tmpb, '\\');
445 if (tmp == NULL)
446 tmp = strrchr(tmpb, '/');
447 if (tmp != NULL)
448 tmp++;
449 else
450 tmp = tmpb;
451 strncpy(incue_fname, tmp, incue_max_len);
226a5691 452 ti[numtracks + 1].handle = fopen(filepath, "rb");
ef79bbde 453
19c03d80 454 // update global offset if this is not first file in this .cue
deebc67f 455 if (numtracks + 1 > 1) {
456 multifile = 1;
19c03d80 457 sector_offs += file_len;
deebc67f 458 }
19c03d80 459
460 file_len = 0;
38b8102c 461 if (ti[numtracks + 1].handle == NULL) {
19c03d80 462 SysPrintf(_("\ncould not open: %s\n"), filepath);
463 continue;
38b8102c 464 }
19c03d80 465 fseek(ti[numtracks + 1].handle, 0, SEEK_END);
466 file_len = ftell(ti[numtracks + 1].handle) / 2352;
467
468 if (numtracks == 0 && strlen(isofile) >= 4 &&
2cc221eb 469 (strcmp(isofile + strlen(isofile) - 4, ".cue") == 0 ||
470 strncasecmp(isofile + strlen(isofile) - 4, ".cd", 3) == 0)) {
471 // user selected .cue/.cdX as image file, use it's data track instead
38b8102c 472 fclose(cdHandle);
226a5691 473 cdHandle = fopen(filepath, "rb");
ef79bbde
P		 474 }
475 }
476 }
477
478 fclose(fi);
479
2cc221eb 480 // if there are no tracks detected, then it's not a cue file
481 if (!numtracks)
482 return -1;
483
ef79bbde
P		 484 return 0;
485}
486
487// this function tries to get the .ccd file of the given .img
488// the necessary data is put into the ti (trackinformation)-array
489static int parseccd(const char *isofile) {
490 char ccdname[MAXPATHLEN];
491 FILE *fi;
492 char linebuf[256];
493 unsigned int t;
494
495 numtracks = 0;
496
497 // copy name of the iso and change extension from .img to .ccd
498 strncpy(ccdname, isofile, sizeof(ccdname));
499 ccdname[MAXPATHLEN - 1] = '\0';
500 if (strlen(ccdname) >= 4) {
501 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
502 }
503 else {
504 return -1;
505 }
506
226a5691 507 if ((fi = fopen(ccdname, "r")) == NULL) {
ef79bbde
P		 508 return -1;
509 }
510
511 memset(&ti, 0, sizeof(ti));
512
513 while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
514 if (!strncmp(linebuf, "[TRACK", 6)){
515 numtracks++;
516 }
517 else if (!strncmp(linebuf, "MODE=", 5)) {
518 sscanf(linebuf, "MODE=%d", &t);
519 ti[numtracks].type = ((t == 0) ? CDDA : DATA);
520 }
521 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
522 sscanf(linebuf, "INDEX 1=%d", &t);
523 sec2msf(t + 2 * 75, ti[numtracks].start);
77160d47 524 ti[numtracks].start_offset = t * 2352;
ef79bbde
P		 525
526 // If we've already seen another track, this is its end
527 if (numtracks > 1) {
528 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
529 sec2msf(t, ti[numtracks - 1].length);
530 }
531 }
532 }
533
534 fclose(fi);
535
536 // Fill out the last track's end based on size
537 if (numtracks >= 1) {
538 fseek(cdHandle, 0, SEEK_END);
539 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
540 sec2msf(t, ti[numtracks].length);
541 }
542
543 return 0;
544}
545
546// this function tries to get the .mds file of the given .mdf
547// the necessary data is put into the ti (trackinformation)-array
548static int parsemds(const char *isofile) {
549 char mdsname[MAXPATHLEN];
550 FILE *fi;
551 unsigned int offset, extra_offset, l, i;
552 unsigned short s;
553
554 numtracks = 0;
555
556 // copy name of the iso and change extension from .mdf to .mds
557 strncpy(mdsname, isofile, sizeof(mdsname));
558 mdsname[MAXPATHLEN - 1] = '\0';
559 if (strlen(mdsname) >= 4) {
560 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
561 }
562 else {
563 return -1;
564 }
565
226a5691 566 if ((fi = fopen(mdsname, "rb")) == NULL) {
ef79bbde
P		 567 return -1;
568 }
569
570 memset(&ti, 0, sizeof(ti));
571
572 // check if it's a valid mds file
9361a5aa
EC		 573 if (fread(&i, 1, sizeof(i), fi) != sizeof(i))
574 goto fail_io;
ef79bbde
P		 575 i = SWAP32(i);
576 if (i != 0x4944454D) {
577 // not an valid mds file
578 fclose(fi);
579 return -1;
580 }
581
582 // get offset to session block
583 fseek(fi, 0x50, SEEK_SET);
9361a5aa
EC		 584 if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
585 goto fail_io;
ef79bbde
P		 586 offset = SWAP32(offset);
587
588 // get total number of tracks
589 offset += 14;
590 fseek(fi, offset, SEEK_SET);
9361a5aa
EC		 591 if (fread(&s, 1, sizeof(s), fi) != sizeof(s))
592 goto fail_io;
ef79bbde
P		 593 s = SWAP16(s);
594 numtracks = s;
595
596 // get offset to track blocks
597 fseek(fi, 4, SEEK_CUR);
9361a5aa
EC		 598 if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
599 goto fail_io;
ef79bbde
P		 600 offset = SWAP32(offset);
601
602 // skip lead-in data
603 while (1) {
604 fseek(fi, offset + 4, SEEK_SET);
605 if (fgetc(fi) < 0xA0) {
606 break;
607 }
608 offset += 0x50;
609 }
610
611 // check if the image contains mixed subchannel data
612 fseek(fi, offset + 1, SEEK_SET);
77160d47 613 subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
ef79bbde
P		 614
615 // read track data
616 for (i = 1; i <= numtracks; i++) {
617 fseek(fi, offset, SEEK_SET);
618
619 // get the track type
620 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
621 fseek(fi, 8, SEEK_CUR);
622
623 // get the track starting point
624 ti[i].start[0] = fgetc(fi);
625 ti[i].start[1] = fgetc(fi);
626 ti[i].start[2] = fgetc(fi);
627
9361a5aa
EC		 628 if (fread(&extra_offset, 1, sizeof(extra_offset), fi) != sizeof(extra_offset))
629 goto fail_io;
ef79bbde
P		 630 extra_offset = SWAP32(extra_offset);
631
19c03d80 632 // get track start offset (in .mdf)
633 fseek(fi, offset + 0x28, SEEK_SET);
9361a5aa
EC		 634 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
635 goto fail_io;
19c03d80 636 l = SWAP32(l);
77160d47 637 ti[i].start_offset = l;
19c03d80 638
8aa91443 639 // get pregap
640 fseek(fi, extra_offset, SEEK_SET);
9361a5aa
EC		 641 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
642 goto fail_io;
8aa91443 643 l = SWAP32(l);
644 if (l != 0 && i > 1)
77160d47 645 pregapOffset = msf2sec(ti[i].start);
8aa91443 646
647 // get the track length
9361a5aa
EC		 648 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
649 goto fail_io;
8aa91443 650 l = SWAP32(l);
651 sec2msf(l, ti[i].length);
652
ef79bbde
P		 653 offset += 0x50;
654 }
ef79bbde
P		 655 fclose(fi);
656 return 0;
9361a5aa
EC		 657fail_io:
658#ifndef NDEBUG
659 SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
660#endif
661 fclose(fi);
662 return -1;
ef79bbde
P		 663}
664
0877957a 665static int handlepbp(const char *isofile) {
9a92bffb 666 struct {
667 unsigned int sig;
668 unsigned int dontcare[8];
669 unsigned int psar_offs;
670 } pbp_hdr;
671 struct {
672 unsigned char type;
673 unsigned char pad0;
674 unsigned char track;
675 char index0[3];
676 char pad1;
677 char index1[3];
678 } toc_entry;
679 struct {
680 unsigned int offset;
681 unsigned int size;
682 unsigned int dontcare[6];
683 } index_entry;
0c2871a7 684 char psar_sig[11];
cc376814 685 off_t psisoimg_offs, cdimg_base;
686 unsigned int t, cd_length;
687 unsigned int offsettab[8];
58cb1438 688 unsigned int psar_offs, index_entry_size, index_entry_offset;
9a92bffb 689 const char *ext = NULL;
690 int i, ret;
691
692 if (strlen(isofile) >= 4)
693 ext = isofile + strlen(isofile) - 4;
694 if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
695 return -1;
696
cc376814 697 fseeko(cdHandle, 0, SEEK_SET);
9726a4af 698
9a92bffb 699 numtracks = 0;
700
701 ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
702 if (ret != sizeof(pbp_hdr)) {
f29fbd53 703 SysPrintf("failed to read pbp\n");
9a92bffb 704 goto fail_io;
705 }
706
58cb1438
PC		 707 psar_offs = SWAP32(pbp_hdr.psar_offs);
708
709 ret = fseeko(cdHandle, psar_offs, SEEK_SET);
9a92bffb 710 if (ret != 0) {
58cb1438 711 SysPrintf("failed to seek to %x\n", psar_offs);
9a92bffb 712 goto fail_io;
713 }
714
58cb1438 715 psisoimg_offs = psar_offs;
9361a5aa
EC		 716 if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
717 goto fail_io;
0c2871a7 718 psar_sig[10] = 0;
719 if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
720 // multidisk image?
58cb1438 721 ret = fseeko(cdHandle, psar_offs + 0x200, SEEK_SET);
0c2871a7 722 if (ret != 0) {
58cb1438 723 SysPrintf("failed to seek to %x\n", psar_offs + 0x200);
0c2871a7 724 goto fail_io;
725 }
726
727 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
f29fbd53 728 SysPrintf("failed to read offsettab\n");
0c2871a7 729 goto fail_io;
730 }
731
732 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
733 if (offsettab[i] == 0)
734 break;
735 }
736 cdrIsoMultidiskCount = i;
737 if (cdrIsoMultidiskCount == 0) {
f29fbd53 738 SysPrintf("multidisk eboot has 0 images?\n");
0c2871a7 739 goto fail_io;
740 }
741
742 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
743 cdrIsoMultidiskSelect = 0;
744
58cb1438 745 psisoimg_offs += SWAP32(offsettab[cdrIsoMultidiskSelect]);
0c2871a7 746
cc376814 747 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
0c2871a7 748 if (ret != 0) {
cc376814 749 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
0c2871a7 750 goto fail_io;
751 }
752
9361a5aa
EC		 753 if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
754 goto fail_io;
0c2871a7 755 psar_sig[10] = 0;
756 }
757
758 if (strcmp(psar_sig, "PSISOIMG00") != 0) {
f29fbd53 759 SysPrintf("bad psar_sig: %s\n", psar_sig);
9a92bffb 760 goto fail_io;
761 }
762
763 // seek to TOC
cc376814 764 ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
9a92bffb 765 if (ret != 0) {
cc376814 766 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
9a92bffb 767 goto fail_io;
768 }
769
770 // first 3 entries are special
771 fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
9361a5aa
EC		 772 if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
773 goto fail_io;
9a92bffb 774 numtracks = btoi(toc_entry.index1[0]);
775
9361a5aa
EC		 776 if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
777 goto fail_io;
9a92bffb 778 cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
779 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
780
781 for (i = 1; i <= numtracks; i++) {
9361a5aa
EC		 782 if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
783 goto fail_io;
9a92bffb 784
785 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
786
787 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
788 btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
77160d47 789 ti[i].start_offset *= 2352;
9a92bffb 790 ti[i].start[0] = btoi(toc_entry.index1[0]);
791 ti[i].start[1] = btoi(toc_entry.index1[1]);
792 ti[i].start[2] = btoi(toc_entry.index1[2]);
793
794 if (i > 1) {
795 t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
796 sec2msf(t, ti[i - 1].length);
797 }
798 }
77160d47 799 t = cd_length - ti[numtracks].start_offset / 2352;
9a92bffb 800 sec2msf(t, ti[numtracks].length);
801
802 // seek to ISO index
cc376814 803 ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
9a92bffb 804 if (ret != 0) {
f29fbd53 805 SysPrintf("failed to seek to ISO index\n");
9a92bffb 806 goto fail_io;
807 }
808
809 compr_img = calloc(1, sizeof(*compr_img));
810 if (compr_img == NULL)
811 goto fail_io;
812
0877957a 813 compr_img->block_shift = 4;
9a92bffb 814 compr_img->current_block = (unsigned int)-1;
815
816 compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
817 compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
818 if (compr_img->index_table == NULL)
819 goto fail_io;
820
0c2871a7 821 cdimg_base = psisoimg_offs + 0x100000;
9a92bffb 822 for (i = 0; i < compr_img->index_len; i++) {
823 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
824 if (ret != sizeof(index_entry)) {
f29fbd53 825 SysPrintf("failed to read index_entry #%d\n", i);
9a92bffb 826 goto fail_index;
827 }
828
58cb1438
PC		 829 index_entry_size = SWAP32(index_entry.size);
830 index_entry_offset = SWAP32(index_entry.offset);
831
832 if (index_entry_size == 0)
9a92bffb 833 break;
834
58cb1438 835 compr_img->index_table[i] = cdimg_base + index_entry_offset;
9a92bffb 836 }
58cb1438 837 compr_img->index_table[i] = cdimg_base + index_entry_offset + index_entry_size;
9a92bffb 838
839 return 0;
840
841fail_index:
842 free(compr_img->index_table);
843 compr_img->index_table = NULL;
9361a5aa
EC		 844 goto done;
845
9a92bffb 846fail_io:
9361a5aa
EC		 847#ifndef NDEBUG
848 SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
849#endif
850
851done:
0877957a 852 if (compr_img != NULL) {
853 free(compr_img);
854 compr_img = NULL;
855 }
856 return -1;
857}
858
859static int handlecbin(const char *isofile) {
860 struct
861 {
862 char magic[4];
863 unsigned int header_size;
864 unsigned long long total_bytes;
865 unsigned int block_size;
866 unsigned char ver; // 1
867 unsigned char align;
868 unsigned char rsv_06[2];
869 } ciso_hdr;
870 const char *ext = NULL;
cc376814 871 unsigned int *index_table = NULL;
0c2871a7 872 unsigned int index = 0, plain;
0877957a 873 int i, ret;
874
875 if (strlen(isofile) >= 5)
876 ext = isofile + strlen(isofile) - 5;
877 if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
878 return -1;
879
9726a4af 880 fseek(cdHandle, 0, SEEK_SET);
881
0877957a 882 ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
883 if (ret != sizeof(ciso_hdr)) {
f29fbd53 884 SysPrintf("failed to read ciso header\n");
0877957a 885 return -1;
886 }
887
888 if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
f29fbd53 889 SysPrintf("bad ciso header\n");
0877957a 890 return -1;
891 }
892 if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
cc376814 893 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
0877957a 894 if (ret != 0) {
f29fbd53 895 SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
0877957a 896 return -1;
897 }
898 }
899
900 compr_img = calloc(1, sizeof(*compr_img));
901 if (compr_img == NULL)
902 goto fail_io;
903
904 compr_img->block_shift = 0;
905 compr_img->current_block = (unsigned int)-1;
906
907 compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
cc376814 908 index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
909 if (index_table == NULL)
0877957a 910 goto fail_io;
911
cc376814 912 ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
0877957a 913 if (ret != compr_img->index_len) {
f29fbd53 914 SysPrintf("failed to read index table\n");
0877957a 915 goto fail_index;
916 }
917
cc376814 918 compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
919 if (compr_img->index_table == NULL)
920 goto fail_index;
921
0877957a 922 for (i = 0; i < compr_img->index_len + 1; i++) {
cc376814 923 index = index_table[i];
0877957a 924 plain = index & 0x80000000;
925 index &= 0x7fffffff;
cc376814 926 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
927 if (plain)
928 compr_img->index_table[i] |= OFF_T_MSB;
0877957a 929 }
0877957a 930
931 return 0;
932
933fail_index:
cc376814 934 free(index_table);
0877957a 935fail_io:
936 if (compr_img != NULL) {
937 free(compr_img);
938 compr_img = NULL;
939 }
9a92bffb 940 return -1;
941}
942
b0ec2e6d 943#ifdef HAVE_CHD
ce188d4d 944static int handlechd(const char *isofile) {
945 chd_img = calloc(1, sizeof(*chd_img));
946 if (chd_img == NULL)
947 goto fail_io;
948
949 if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
1d2757f4 950 goto fail_io;
951
952 if (Config.CHD_Precache && (chd_precache(chd_img->chd) != CHDERR_NONE))
953 goto fail_io;
ce188d4d 954
955 chd_img->header = chd_get_header(chd_img->chd);
956
957 chd_img->buffer = malloc(chd_img->header->hunkbytes);
958 if (chd_img->buffer == NULL)
959 goto fail_io;
960
961 chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
962 chd_img->current_hunk = (unsigned int)-1;
963
964 cddaBigEndian = TRUE;
965
966 numtracks = 0;
055b81e1 967 int frame_offset = 0;
968 int file_offset = 0;
ce188d4d 969 memset(ti, 0, sizeof(ti));
970
971 while (1)
972 {
973 struct {
974 char type[64];
975 char subtype[32];
976 char pgtype[32];
977 char pgsub[32];
978 uint32_t track;
979 uint32_t frames;
980 uint32_t pregap;
981 uint32_t postgap;
982 } md = {};
983 char meta[256];
984 uint32_t meta_size = 0;
985
986 if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
987 sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
988 else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
989 sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
990 else
991 break;
992
75d5614b 993 SysPrintf("chd: %s\n", meta);
994
995 if (md.track == 1) {
055b81e1 996 md.pregap = 150;
75d5614b 997 if (!strncmp(md.subtype, "RW", 2)) {
998 subChanMixed = TRUE;
999 if (!strcmp(md.subtype, "RW_RAW"))
1000 subChanRaw = TRUE;
1001 }
1002 }
055b81e1 1003 else
1004 sec2msf(msf2sec(ti[md.track-1].length) + md.pregap, ti[md.track-1].length);
ce188d4d 1005
055b81e1 1006 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
ce188d4d 1007
055b81e1 1008 sec2msf(frame_offset + md.pregap, ti[md.track].start);
1009 sec2msf(md.frames, ti[md.track].length);
ce188d4d 1010
055b81e1 1011 ti[md.track].start_offset = file_offset;
ce188d4d 1012
055b81e1 1013 frame_offset += md.pregap + md.frames + md.postgap;
1014 file_offset += md.frames + md.postgap;
ce188d4d 1015 numtracks++;
1016 }
1017
1018 if (numtracks)
1019 return 0;
1020
1021fail_io:
1022 if (chd_img != NULL) {
1023 free(chd_img->buffer);
1024 free(chd_img);
1025 chd_img = NULL;
1026 }
1027 return -1;
1028}
b0ec2e6d 1029#endif
ce188d4d 1030
ef79bbde
P		 1031// this function tries to get the .sub file of the given .img
1032static int opensubfile(const char *isoname) {
1033 char subname[MAXPATHLEN];
1034
1035 // copy name of the iso and change extension from .img to .sub
1036 strncpy(subname, isoname, sizeof(subname));
1037 subname[MAXPATHLEN - 1] = '\0';
1038 if (strlen(subname) >= 4) {
1039 strcpy(subname + strlen(subname) - 4, ".sub");
1040 }
1041 else {
1042 return -1;
1043 }
1044
226a5691 1045 subHandle = fopen(subname, "rb");
ef79bbde
P		 1046 if (subHandle == NULL) {
1047 return -1;
1048 }
1049
1050 return 0;
1051}
1052
ae4e7dc9 1053static int opensbifile(const char *isoname) {
ba1cce07 1054 char sbiname[MAXPATHLEN], disknum[MAXPATHLEN] = "0";
ae4e7dc9 1055 int s;
1056
1057 strncpy(sbiname, isoname, sizeof(sbiname));
1058 sbiname[MAXPATHLEN - 1] = '\0';
1059 if (strlen(sbiname) >= 4) {
ba1cce07
S		 1060 if (cdrIsoMultidiskCount > 1) {
1061 sprintf(disknum, "_%i.sbi", cdrIsoMultidiskSelect + 1);
1062 strcpy(sbiname + strlen(sbiname) - 4, disknum);
1063 }
1064 else
1065 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
ae4e7dc9 1066 }
1067 else {
1068 return -1;
1069 }
1070
1071 fseek(cdHandle, 0, SEEK_END);
1072 s = ftell(cdHandle) / 2352;
1073
1074 return LoadSBI(sbiname, s);
1075}
1076
679b71e2
JW		 1077#ifdef _WIN32
1078static void readThreadStop() {}
1079static void readThreadStart() {}
1080#else
1081static pthread_t read_thread_id;
1082
1083static pthread_cond_t read_thread_msg_avail;
1084static pthread_cond_t read_thread_msg_done;
1085static pthread_mutex_t read_thread_msg_lock;
1086
1087static pthread_cond_t sectorbuffer_cond;
1088static pthread_mutex_t sectorbuffer_lock;
1089
1090static boolean read_thread_running = FALSE;
1091static int read_thread_sector_start = -1;
1092static int read_thread_sector_end = -1;
1093
1094typedef struct {
1095 int sector;
1096 long ret;
1097 unsigned char data[CD_FRAMESIZE_RAW];
1098} SectorBufferEntry;
1099
1100#define SECTOR_BUFFER_SIZE 4096
1101
1102static SectorBufferEntry *sectorbuffer;
1103static size_t sectorbuffer_index;
1104
1105int (*sync_cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
1106unsigned char *(*sync_CDR_getBuffer)(void);
1107
1108static unsigned char * CALLBACK ISOgetBuffer_async(void);
1109static int cdread_async(FILE *f, unsigned int base, void *dest, int sector);
1110
1111static void *readThreadMain(void *param) {
1112 int max_sector = -1;
1113 int requested_sector_start = -1;
1114 int requested_sector_end = -1;
1115 int last_read_sector = -1;
1116 int index = 0;
1117
1118 int ra_sector = -1;
1119 int max_ra = 128;
1120 int initial_ra = 1;
1121 int speedmult_ra = 4;
1122
1123 int ra_count = 0;
1124 int how_far_ahead = 0;
1125
1126 unsigned char tmpdata[CD_FRAMESIZE_RAW];
1127 long ret;
1128
1129 max_sector = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1130
1131 while(1) {
1132 pthread_mutex_lock(&read_thread_msg_lock);
1133
1134 // If we don't have readahead and we don't have a sector request, wait for one.
1135 // If we still have readahead to go, don't block, just keep going.
1136 // And if we ever have a sector request pending, acknowledge and reset it.
1137
1138 if (!ra_count) {
1139 if (read_thread_sector_start == -1 && read_thread_running) {
1140 pthread_cond_wait(&read_thread_msg_avail, &read_thread_msg_lock);
1141 }
1142 }
1143
1144 if (read_thread_sector_start != -1) {
1145 requested_sector_start = read_thread_sector_start;
1146 requested_sector_end = read_thread_sector_end;
1147 read_thread_sector_start = -1;
1148 read_thread_sector_end = -1;
1149 pthread_cond_signal(&read_thread_msg_done);
1150 }
1151
1152 pthread_mutex_unlock(&read_thread_msg_lock);
1153
1154 if (!read_thread_running)
1155 break;
1156
1157 // Readahead code, based on the implementation in mednafen psx's cdromif.cpp
1158 if (requested_sector_start != -1) {
1159 if (last_read_sector != -1 && last_read_sector == (requested_sector_start - 1)) {
1160 how_far_ahead = ra_sector - requested_sector_end;
1161
1162 if(how_far_ahead <= max_ra)
1163 ra_count = (max_ra - how_far_ahead + 1 ? max_ra - how_far_ahead + 1 : speedmult_ra);
1164 else
1165 ra_count++;
1166 } else if (requested_sector_end != last_read_sector) {
1167 ra_sector = requested_sector_end;
1168 ra_count = initial_ra;
1169 }
1170
1171 last_read_sector = requested_sector_end;
1172 }
1173
00e69290
JW		 1174 index = ra_sector % SECTOR_BUFFER_SIZE;
1175
679b71e2
JW		 1176 // check for end of CD
1177 if (ra_count && ra_sector >= max_sector) {
1178 ra_count = 0;
00e69290
JW		 1179 pthread_mutex_lock(&sectorbuffer_lock);
1180 sectorbuffer[index].ret = -1;
1181 sectorbuffer[index].sector = ra_sector;
1182 pthread_cond_signal(&sectorbuffer_cond);
1183 pthread_mutex_unlock(&sectorbuffer_lock);
679b71e2
JW		 1184 }
1185
1186 if (ra_count) {
679b71e2
JW		 1187 pthread_mutex_lock(&sectorbuffer_lock);
1188 if (sectorbuffer[index].sector != ra_sector) {
1189 pthread_mutex_unlock(&sectorbuffer_lock);
1190
1191 ret = sync_cdimg_read_func(cdHandle, 0, tmpdata, ra_sector);
1192
1193 pthread_mutex_lock(&sectorbuffer_lock);
1194 sectorbuffer[index].ret = ret;
1195 sectorbuffer[index].sector = ra_sector;
1196 memcpy(sectorbuffer[index].data, tmpdata, CD_FRAMESIZE_RAW);
1197 }
1198 pthread_cond_signal(&sectorbuffer_cond);
1199 pthread_mutex_unlock(&sectorbuffer_lock);
1200
1201 ra_sector++;
1202 ra_count--;
1203 }
1204 }
1205
1206 return NULL;
1207}
1208
1209static void readThreadStop() {
1210 if (read_thread_running == TRUE) {
1211 read_thread_running = FALSE;
1212 pthread_cond_signal(&read_thread_msg_avail);
1213 pthread_join(read_thread_id, NULL);
1214 }
1215
1216 pthread_cond_destroy(&read_thread_msg_done);
1217 pthread_cond_destroy(&read_thread_msg_avail);
1218 pthread_mutex_destroy(&read_thread_msg_lock);
1219
1220 pthread_cond_destroy(&sectorbuffer_cond);
1221 pthread_mutex_destroy(&sectorbuffer_lock);
1222
1223 CDR_getBuffer = sync_CDR_getBuffer;
1224 cdimg_read_func = sync_cdimg_read_func;
1225
1226 free(sectorbuffer);
1227 sectorbuffer = NULL;
1228}
1229
1230static void readThreadStart() {
1231 SysPrintf("Starting async CD thread\n");
1232
1233 if (read_thread_running == TRUE)
1234 return;
1235
1236 read_thread_running = TRUE;
1237 read_thread_sector_start = -1;
1238 read_thread_sector_end = -1;
1239 sectorbuffer_index = 0;
1240
1241 sectorbuffer = calloc(SECTOR_BUFFER_SIZE, sizeof(SectorBufferEntry));
1242 if(!sectorbuffer)
1243 goto error;
1244
1245 sectorbuffer[0].sector = -1; // Otherwise we might think we've already fetched sector 0!
1246
1247 sync_CDR_getBuffer = CDR_getBuffer;
1248 CDR_getBuffer = ISOgetBuffer_async;
1249 sync_cdimg_read_func = cdimg_read_func;
1250 cdimg_read_func = cdread_async;
1251
1252 if (pthread_cond_init(&read_thread_msg_avail, NULL) ||
1253 pthread_cond_init(&read_thread_msg_done, NULL) ||
1254 pthread_mutex_init(&read_thread_msg_lock, NULL) ||
1255 pthread_cond_init(&sectorbuffer_cond, NULL) ||
1256 pthread_mutex_init(&sectorbuffer_lock, NULL) ||
1257 pthread_create(&read_thread_id, NULL, readThreadMain, NULL))
1258 goto error;
1259
1260 return;
1261
1262 error:
1263 SysPrintf("Error starting async CD thread\n");
1264 SysPrintf("Falling back to sync\n");
1265
1266 readThreadStop();
1267}
1268#endif
1269
77160d47 1270static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
9a92bffb 1271{
77160d47 1272 fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
81abe4d5 1273 return fread(dest, 1, CD_FRAMESIZE_RAW, f);
9a92bffb 1274}
1275
77160d47 1276static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
9a92bffb 1277{
1278 int ret;
1279
77160d47 1280 fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
81abe4d5 1281 ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
9361a5aa
EC		 1282 if (fread(subbuffer, 1, SUB_FRAMESIZE, f) != SUB_FRAMESIZE)
1283 goto fail_io;
9a92bffb 1284
1285 if (subChanRaw) DecodeRawSubData();
9361a5aa
EC		 1286 goto done;
1287
1288fail_io:
1289#ifndef NDEBUG
1290 SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
1291#endif
9a92bffb 1292
9361a5aa 1293done:
9a92bffb 1294 return ret;
1295}
1296
2dd6a826 1297static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
9a92bffb 1298{
1299 static z_stream z;
1300 int ret = 0;
1301
1302 if (z.zalloc == NULL) {
1303 // XXX: one-time leak here..
1304 z.next_in = Z_NULL;
1305 z.avail_in = 0;
1306 z.zalloc = Z_NULL;
1307 z.zfree = Z_NULL;
1308 z.opaque = Z_NULL;
1309 ret = inflateInit2(&z, -15);
1310 }
1311 else
1312 ret = inflateReset(&z);
1313 if (ret != Z_OK)
1314 return ret;
1315
1316 z.next_in = in;
1317 z.avail_in = in_size;
1318 z.next_out = out;
1319 z.avail_out = *out_size;
1320
1321 ret = inflate(&z, Z_NO_FLUSH);
1322 //inflateEnd(&z);
1323
1324 *out_size -= z.avail_out;
1325 return ret == 1 ? 0 : ret;
1326}
1327
77160d47 1328static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
9a92bffb 1329{
0877957a 1330 unsigned long cdbuffer_size, cdbuffer_size_expect;
cc376814 1331 unsigned int size;
0877957a 1332 int is_compressed;
cc376814 1333 off_t start_byte;
9a92bffb 1334 int ret, block;
1335
77160d47 1336 if (base)
1337 sector += base / 2352;
1338
0877957a 1339 block = sector >> compr_img->block_shift;
1340 compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
9a92bffb 1341
1342 if (block == compr_img->current_block) {
1343 //printf("hit sect %d\n", sector);
1344 goto finish;
1345 }
1346
1347 if (sector >= compr_img->index_len * 16) {
f29fbd53 1348 SysPrintf("sector %d is past img end\n", sector);
9a92bffb 1349 return -1;
1350 }
1351
cc376814 1352 start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1353 if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1354 SysPrintf("seek error for block %d at %llx: ",
1355 block, (long long)start_byte);
9a92bffb 1356 perror(NULL);
1357 return -1;
1358 }
1359
cc376814 1360 is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1361 size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
9a92bffb 1362 if (size > sizeof(compr_img->buff_compressed)) {
f29fbd53 1363 SysPrintf("block %d is too large: %u\n", block, size);
9a92bffb 1364 return -1;
1365 }
1366
0877957a 1367 if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1368 1, size, cdHandle) != size) {
f29fbd53 1369 SysPrintf("read error for block %d at %x: ", block, start_byte);
9a92bffb 1370 perror(NULL);
1371 return -1;
1372 }
1373
0877957a 1374 if (is_compressed) {
1375 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1376 cdbuffer_size = cdbuffer_size_expect;
2dd6a826 1377 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
0877957a 1378 if (ret != 0) {
f29fbd53 1379 SysPrintf("uncompress failed with %d for block %d, sector %d\n",
0877957a 1380 ret, block, sector);
1381 return -1;
1382 }
1383 if (cdbuffer_size != cdbuffer_size_expect)
f29fbd53 1384 SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
0877957a 1385 cdbuffer_size_expect, sector);
9a92bffb 1386 }
9a92bffb 1387
1388 // done at last!
1389 compr_img->current_block = block;
1390
1391finish:
1392 if (dest != cdbuffer) // copy avoid HACK
81abe4d5 1393 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1394 CD_FRAMESIZE_RAW);
1395 return CD_FRAMESIZE_RAW;
9a92bffb 1396}
1397
b0ec2e6d 1398#ifdef HAVE_CHD
ce188d4d 1399static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1400{
1401 int hunk;
1402
1403 if (base)
055b81e1 1404 sector += base;
ce188d4d 1405
1406 hunk = sector / chd_img->sectors_per_hunk;
1407 chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1408
055b81e1 1409 if (hunk != chd_img->current_hunk)
1410 {
1411 chd_read(chd_img->chd, hunk, chd_img->buffer);
1412 chd_img->current_hunk = hunk;
1413 }
ce188d4d 1414
ce188d4d 1415 if (dest != cdbuffer) // copy avoid HACK
1416 memcpy(dest, chd_img->buffer[chd_img->sector_in_hunk],
1417 CD_FRAMESIZE_RAW);
75d5614b 1418 if (subChanMixed) {
1419 memcpy(subbuffer, chd_img->buffer[chd_img->sector_in_hunk] + CD_FRAMESIZE_RAW,
1420 SUB_FRAMESIZE);
1421 if (subChanRaw)
1422 DecodeRawSubData();
1423 }
ce188d4d 1424 return CD_FRAMESIZE_RAW;
1425}
b0ec2e6d 1426#endif
77160d47 1427static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
9a92bffb 1428{
1429 int ret;
1430
77160d47 1431 fseek(f, base + sector * 2048, SEEK_SET);
81abe4d5 1432 ret = fread((char *)dest + 12 * 2, 1, 2048, f);
9a92bffb 1433
1434 // not really necessary, fake mode 2 header
81abe4d5 1435 memset(cdbuffer, 0, 12 * 2);
1436 sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1437 cdbuffer[12 + 3] = 1;
9a92bffb 1438
1439 return ret;
1440}
1441
679b71e2
JW		 1442#ifndef _WIN32
1443
1444static int cdread_async(FILE *f, unsigned int base, void *dest, int sector) {
1445 boolean found = FALSE;
1446 int i = sector % SECTOR_BUFFER_SIZE;
1447 long ret;
1448
1449 if (f != cdHandle || base != 0 || dest != cdbuffer) {
1450 // Async reads are only supported for cdbuffer, so call the sync
1451 // function directly.
1452 return sync_cdimg_read_func(f, base, dest, sector);
1453 }
1454
1455 pthread_mutex_lock(&read_thread_msg_lock);
1456
1457 // Only wait if we're not trying to read the next sector and
1458 // sector_start is set (meaning the last request hasn't been
1459 // processed yet)
1460 while(read_thread_sector_start != -1 && read_thread_sector_end + 1 != sector) {
1461 pthread_cond_wait(&read_thread_msg_done, &read_thread_msg_lock);
1462 }
1463
1464 if (read_thread_sector_start == -1)
1465 read_thread_sector_start = sector;
1466
1467 read_thread_sector_end = sector;
1468 pthread_cond_signal(&read_thread_msg_avail);
1469 pthread_mutex_unlock(&read_thread_msg_lock);
1470
1471 do {
1472 pthread_mutex_lock(&sectorbuffer_lock);
1473 if (sectorbuffer[i].sector == sector) {
1474 sectorbuffer_index = i;
1475 ret = sectorbuffer[i].ret;
1476 found = TRUE;
1477 }
1478
1479 if (!found) {
1480 pthread_cond_wait(&sectorbuffer_cond, &sectorbuffer_lock);
1481 }
1482 pthread_mutex_unlock(&sectorbuffer_lock);
1483 } while (!found);
1484
1485 return ret;
1486}
1487
1488#endif
1489
9a92bffb 1490static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1491 return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1492}
1493
b0ec2e6d 1494#ifdef HAVE_CHD
ce188d4d 1495static unsigned char * CALLBACK ISOgetBuffer_chd(void) {
1496 return chd_img->buffer[chd_img->sector_in_hunk] + 12;
1497}
b0ec2e6d 1498#endif
ce188d4d 1499
679b71e2
JW		 1500#ifndef _WIN32
1501static unsigned char * CALLBACK ISOgetBuffer_async(void) {
1502 unsigned char *buffer;
1503 pthread_mutex_lock(&sectorbuffer_lock);
1504 buffer = sectorbuffer[sectorbuffer_index].data;
1505 pthread_mutex_unlock(&sectorbuffer_lock);
1506 return buffer + 12;
1507}
1508
1509#endif
1510
9a92bffb 1511static unsigned char * CALLBACK ISOgetBuffer(void) {
81abe4d5 1512 return cdbuffer + 12;
9a92bffb 1513}
1514
ef79bbde
P		 1515static void PrintTracks(void) {
1516 int i;
1517
1518 for (i = 1; i <= numtracks; i++) {
1519 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1520 i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1521 ti[i].start[0], ti[i].start[1], ti[i].start[2],
1522 ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1523 }
1524}
1525
1526// This function is invoked by the front-end when opening an ISO
1527// file for playback
1528static long CALLBACK ISOopen(void) {
9a92bffb 1529 boolean isMode1ISO = FALSE;
689e0447 1530 char alt_bin_filename[MAXPATHLEN];
1531 const char *bin_filename;
75d5614b 1532 char image_str[1024];
1533 int is_chd = 0;
9a92bffb 1534
ef79bbde
P		 1535 if (cdHandle != NULL) {
1536 return 0; // it's already open
1537 }
1538
226a5691 1539 cdHandle = fopen(GetIsoFile(), "rb");
ef79bbde 1540 if (cdHandle == NULL) {
2e058581 1541 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1542 GetIsoFile(), strerror(errno));
ef79bbde
P		 1543 return -1;
1544 }
1545
75d5614b 1546 snprintf(image_str, sizeof(image_str) - 6*4 - 1,
1547 "Loaded CD Image: %s", GetIsoFile());
ef79bbde
P		 1548
1549 cddaBigEndian = FALSE;
1550 subChanMixed = FALSE;
1551 subChanRaw = FALSE;
8aa91443 1552 pregapOffset = 0;
0c2871a7 1553 cdrIsoMultidiskCount = 1;
deebc67f 1554 multifile = 0;
ef79bbde 1555
9a92bffb 1556 CDR_getBuffer = ISOgetBuffer;
1557 cdimg_read_func = cdread_normal;
1558
92f43ab0 1559 if (parsetoc(GetIsoFile()) == 0) {
208177a7 1560 strcat(image_str, "[+toc]");
ef79bbde
P		 1561 }
1562 else if (parseccd(GetIsoFile()) == 0) {
208177a7 1563 strcat(image_str, "[+ccd]");
ef79bbde
P		 1564 }
1565 else if (parsemds(GetIsoFile()) == 0) {
208177a7 1566 strcat(image_str, "[+mds]");
ef79bbde 1567 }
92f43ab0 1568 else if (parsecue(GetIsoFile()) == 0) {
208177a7 1569 strcat(image_str, "[+cue]");
92f43ab0 1570 }
0877957a 1571 if (handlepbp(GetIsoFile()) == 0) {
208177a7 1572 strcat(image_str, "[+pbp]");
9a92bffb 1573 CDR_getBuffer = ISOgetBuffer_compr;
1574 cdimg_read_func = cdread_compressed;
1575 }
0877957a 1576 else if (handlecbin(GetIsoFile()) == 0) {
208177a7 1577 strcat(image_str, "[+cbin]");
0877957a 1578 CDR_getBuffer = ISOgetBuffer_compr;
1579 cdimg_read_func = cdread_compressed;
1580 }
b0ec2e6d 1581#ifdef HAVE_CHD
ce188d4d 1582 else if (handlechd(GetIsoFile()) == 0) {
208177a7 1583 strcat(image_str, "[+chd]");
ce188d4d 1584 CDR_getBuffer = ISOgetBuffer_chd;
1585 cdimg_read_func = cdread_chd;
75d5614b 1586 is_chd = 1;
ce188d4d 1587 }
b0ec2e6d 1588#endif
ef79bbde
P		 1589
1590 if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
208177a7 1591 strcat(image_str, "[+sub]");
ef79bbde 1592 }
ae4e7dc9 1593 if (opensbifile(GetIsoFile()) == 0) {
208177a7 1594 strcat(image_str, "[+sbi]");
ae4e7dc9 1595 }
ef79bbde 1596
cc376814 1597 fseeko(cdHandle, 0, SEEK_END);
c9e5423e 1598
1599 // maybe user selected metadata file instead of main .bin ..
689e0447 1600 bin_filename = GetIsoFile();
cc376814 1601 if (ftello(cdHandle) < 2352 * 0x10) {
c9e5423e 1602 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
689e0447 1603 FILE *tmpf = NULL;
c9e5423e 1604 size_t i;
689e0447 1605 char *p;
c9e5423e 1606
689e0447 1607 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1608 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1609 if (strlen(alt_bin_filename) >= 4) {
1610 p = alt_bin_filename + strlen(alt_bin_filename) - 4;
c9e5423e 1611 for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1612 strcpy(p, exts[i]);
226a5691 1613 tmpf = fopen(alt_bin_filename, "rb");
689e0447 1614 if (tmpf != NULL)
c9e5423e 1615 break;
c9e5423e 1616 }
1617 }
689e0447 1618 if (tmpf != NULL) {
1619 bin_filename = alt_bin_filename;
1620 fclose(cdHandle);
1621 cdHandle = tmpf;
cc376814 1622 fseeko(cdHandle, 0, SEEK_END);
689e0447 1623 }
c9e5423e 1624 }
1625
1626 // guess whether it is mode1/2048
cc376814 1627 if (ftello(cdHandle) % 2048 == 0) {
9a92bffb 1628 unsigned int modeTest = 0;
1629 fseek(cdHandle, 0, SEEK_SET);
4f0c5e3f 1630 if (!fread(&modeTest, sizeof(modeTest), 1, cdHandle)) {
9361a5aa
EC		 1631#ifndef NDEBUG
1632 SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
1633#endif
1634 return -1;
1635 }
9a92bffb 1636 if (SWAP32(modeTest) != 0xffffff00) {
208177a7 1637 strcat(image_str, "[2048]");
9a92bffb 1638 isMode1ISO = TRUE;
1639 }
1640 }
1641 fseek(cdHandle, 0, SEEK_SET);
1642
208177a7 1643 SysPrintf("%s.\n", image_str);
ef79bbde
P		 1644
1645 PrintTracks();
1646
75d5614b 1647 if (subChanMixed && !is_chd)
9a92bffb 1648 cdimg_read_func = cdread_sub_mixed;
1649 else if (isMode1ISO)
1650 cdimg_read_func = cdread_2048;
1651
38b8102c 1652 // make sure we have another handle open for cdda
1653 if (numtracks > 1 && ti[1].handle == NULL) {
226a5691 1654 ti[1].handle = fopen(bin_filename, "rb");
38b8102c 1655 }
77160d47 1656 cdda_cur_sector = 0;
1657 cdda_file_offset = 0;
38b8102c 1658
679b71e2
JW		 1659 if (Config.AsyncCD) {
1660 readThreadStart();
1661 }
ef79bbde
P		 1662 return 0;
1663}
1664
1665static long CALLBACK ISOclose(void) {
38b8102c 1666 int i;
1667
ef79bbde
P		 1668 if (cdHandle != NULL) {
1669 fclose(cdHandle);
1670 cdHandle = NULL;
1671 }
1672 if (subHandle != NULL) {
1673 fclose(subHandle);
1674 subHandle = NULL;
1675 }
6e537c6d 1676 playing = FALSE;
38b8102c 1677 cddaHandle = NULL;
1678
9a92bffb 1679 if (compr_img != NULL) {
1680 free(compr_img->index_table);
1681 free(compr_img);
1682 compr_img = NULL;
1683 }
1684
b0ec2e6d 1685#ifdef HAVE_CHD
ce188d4d 1686 if (chd_img != NULL) {
1687 chd_close(chd_img->chd);
1688 free(chd_img->buffer);
1689 free(chd_img);
1690 chd_img = NULL;
1691 }
b0ec2e6d 1692#endif
ce188d4d 1693
38b8102c 1694 for (i = 1; i <= numtracks; i++) {
1695 if (ti[i].handle != NULL) {
1696 fclose(ti[i].handle);
1697 ti[i].handle = NULL;
1698 }
1699 }
1700 numtracks = 0;
c0ee7ac6 1701 ti[1].type = 0;
ae4e7dc9 1702 UnloadSBI();
38b8102c 1703
c0ee7ac6 1704 memset(cdbuffer, 0, sizeof(cdbuffer));
1705 CDR_getBuffer = ISOgetBuffer;
1706
49942a16 1707 if (Config.AsyncCD) {
1708 readThreadStop();
1709 }
1710
38b8102c 1711 return 0;
1712}
1713
1714static long CALLBACK ISOinit(void) {
1715 assert(cdHandle == NULL);
1716 assert(subHandle == NULL);
1717
1718 return 0; // do nothing
1719}
1720
1721static long CALLBACK ISOshutdown(void) {
1722 ISOclose();
ef79bbde
P		 1723 return 0;
1724}
1725
1726// return Starting and Ending Track
1727// buffer:
1728// byte 0 - start track
1729// byte 1 - end track
1730static long CALLBACK ISOgetTN(unsigned char *buffer) {
1731 buffer[0] = 1;
1732
1733 if (numtracks > 0) {
1734 buffer[1] = numtracks;
1735 }
1736 else {
1737 buffer[1] = 1;
1738 }
1739
1740 return 0;
1741}
1742
1743// return Track Time
1744// buffer:
1745// byte 0 - frame
1746// byte 1 - second
1747// byte 2 - minute
1748static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
858ad511 1749 if (track == 0) {
858ad511 1750 unsigned int sect;
1751 unsigned char time[3];
1752 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
ab948f7e 1753 sec2msf(sect, (char *)time);
858ad511 1754 buffer[2] = time[0];
1755 buffer[1] = time[1];
1756 buffer[0] = time[2];
1757 }
1758 else if (numtracks > 0 && track <= numtracks) {
ef79bbde
P		 1759 buffer[2] = ti[track].start[0];
1760 buffer[1] = ti[track].start[1];
1761 buffer[0] = ti[track].start[2];
1762 }
1763 else {
1764 buffer[2] = 0;
1765 buffer[1] = 2;
1766 buffer[0] = 0;
1767 }
1768
1769 return 0;
1770}
1771
1772// decode 'raw' subchannel data ripped by cdrdao
1773static void DecodeRawSubData(void) {
1774 unsigned char subQData[12];
1775 int i;
1776
1777 memset(subQData, 0, sizeof(subQData));
1778
1779 for (i = 0; i < 8 * 12; i++) {
1780 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1781 subQData[i >> 3] |= (1 << (7 - (i & 7)));
1782 }
1783 }
1784
1785 memcpy(&subbuffer[12], subQData, 12);
1786}
1787
1788// read track
1789// time: byte 0 - minute; byte 1 - second; byte 2 - frame
1790// uses bcd format
d2e271b2 1791static boolean CALLBACK ISOreadTrack(unsigned char *time) {
19c03d80 1792 int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
c0ee7ac6 1793 long ret;
19c03d80 1794
ef79bbde 1795 if (cdHandle == NULL) {
d2e271b2 1796 return 0;
ef79bbde
P		 1797 }
1798
8aa91443 1799 if (pregapOffset) {
1800 subChanMissing = FALSE;
1801 if (sector >= pregapOffset) {
1802 sector -= 2 * 75;
1803 if (sector < pregapOffset)
1804 subChanMissing = TRUE;
1805 }
1806 }
1807
c0ee7ac6 1808 ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1809 if (ret < 0)
d2e271b2 1810 return 0;
ef79bbde 1811
9a92bffb 1812 if (subHandle != NULL) {
1813 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
9361a5aa
EC		 1814 if (fread(subbuffer, 1, SUB_FRAMESIZE, subHandle) != SUB_FRAMESIZE)
1815 /* Faulty subchannel data shouldn't cause a read failure */
1816 return 0;
ef79bbde 1817
9a92bffb 1818 if (subChanRaw) DecodeRawSubData();
ef79bbde
P		 1819 }
1820
d2e271b2 1821 return 1;
ef79bbde
P		 1822}
1823
ef79bbde
P		 1824// plays cdda audio
1825// sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1826// does NOT uses bcd format
66425c25 1827static long CALLBACK ISOplay(void) {
1828 playing = TRUE;
ef79bbde
P		 1829 return 0;
1830}
1831
1832// stops cdda audio
1833static long CALLBACK ISOstop(void) {
66425c25 1834 playing = FALSE;
ef79bbde
P		 1835 return 0;
1836}
1837
1838// gets subchannel data
1839static unsigned char* CALLBACK ISOgetBufferSub(void) {
8aa91443 1840 if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
ef79bbde
P		 1841 return subbuffer;
1842 }
1843
1844 return NULL;
1845}
1846
1847static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
deebc67f 1848 u32 sect;
1849
ef79bbde 1850 CDR__getStatus(stat);
deebc67f 1851
ef79bbde
P		 1852 if (playing) {
1853 stat->Type = 0x02;
1854 stat->Status |= 0x80;
ef79bbde
P		 1855 }
1856 else {
deebc67f 1857 // BIOS - boot ID (CD type)
1858 stat->Type = ti[1].type;
1859 }
1860
1861 // relative -> absolute time
1862 sect = cddaCurPos;
1863 sec2msf(sect, (char *)stat->Time);
1864
1865 return 0;
1866}
1867
1868// read CDDA sector into buffer
1869long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1870 unsigned char msf[3] = {m, s, f};
1871 unsigned int file, track, track_start = 0;
1872 int ret;
1873
1874 cddaCurPos = msf2sec((char *)msf);
1875
1876 // find current track index
1877 for (track = numtracks; ; track--) {
1878 track_start = msf2sec(ti[track].start);
1879 if (track_start <= cddaCurPos)
1880 break;
1881 if (track == 1)
1882 break;
1883 }
1884
1885 // data tracks play silent
1886 if (ti[track].type != CDDA) {
1887 memset(buffer, 0, CD_FRAMESIZE_RAW);
1888 return 0;
1889 }
1890
1891 file = 1;
1892 if (multifile) {
1893 // find the file that contains this track
1894 for (file = track; file > 1; file--)
1895 if (ti[file].handle != NULL)
1896 break;
ef79bbde
P		 1897 }
1898
deebc67f 1899 ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1900 buffer, cddaCurPos - track_start);
1901 if (ret != CD_FRAMESIZE_RAW) {
1902 memset(buffer, 0, CD_FRAMESIZE_RAW);
1903 return -1;
1904 }
1905
1906 if (cddaBigEndian) {
1907 int i;
1908 unsigned char tmp;
1909
1910 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1911 tmp = buffer[i * 2];
1912 buffer[i * 2] = buffer[i * 2 + 1];
1913 buffer[i * 2 + 1] = tmp;
1914 }
1915 }
858ad511 1916
ef79bbde
P		 1917 return 0;
1918}
1919
1920void cdrIsoInit(void) {
1921 CDR_init = ISOinit;
1922 CDR_shutdown = ISOshutdown;
1923 CDR_open = ISOopen;
1924 CDR_close = ISOclose;
1925 CDR_getTN = ISOgetTN;
1926 CDR_getTD = ISOgetTD;
1927 CDR_readTrack = ISOreadTrack;
1928 CDR_getBuffer = ISOgetBuffer;
1929 CDR_play = ISOplay;
1930 CDR_stop = ISOstop;
1931 CDR_getBufferSub = ISOgetBufferSub;
1932 CDR_getStatus = ISOgetStatus;
deebc67f 1933 CDR_readCDDA = ISOreadCDDA;
ef79bbde
P		 1934
1935 CDR_getDriveLetter = CDR__getDriveLetter;
1936 CDR_configure = CDR__configure;
1937 CDR_test = CDR__test;
1938 CDR_about = CDR__about;
1939 CDR_setfilename = CDR__setfilename;
1940
1941 numtracks = 0;
1942}
1943
1944int cdrIsoActive(void) {
1945 return (cdHandle != NULL);
1946}
ARM optimized PCSX fork