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fix maemo build
[pcsx_rearmed.git] / libpcsxcore / cdriso.c
CommitLineData
ef79bbde
P		 1/***************************************************************************
2 * Copyright (C) 2007 PCSX-df Team *
3 * Copyright (C) 2009 Wei Mingzhi *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. *
19 ***************************************************************************/
20
21#include "psxcommon.h"
22#include "plugins.h"
23#include "cdrom.h"
24#include "cdriso.h"
ae4e7dc9 25#include "ppf.h"
ef79bbde
P		 26
27#ifdef _WIN32
28#include <process.h>
29#include <windows.h>
30#else
31#include <pthread.h>
32#include <sys/time.h>
33#endif
9a92bffb 34#include <zlib.h>
ef79bbde
P		 35
36static FILE *cdHandle = NULL;
37static FILE *cddaHandle = NULL;
38static FILE *subHandle = NULL;
39
40static boolean subChanMixed = FALSE;
41static boolean subChanRaw = FALSE;
8aa91443 42static boolean subChanMissing = FALSE;
ef79bbde
P		 43
44static unsigned char cdbuffer[DATA_SIZE];
45static unsigned char subbuffer[SUB_FRAMESIZE];
46
47static unsigned char sndbuffer[CD_FRAMESIZE_RAW * 10];
48
49#define CDDA_FRAMETIME (1000 * (sizeof(sndbuffer) / CD_FRAMESIZE_RAW) / 75)
50
51#ifdef _WIN32
52static HANDLE threadid;
53#else
54static pthread_t threadid;
55#endif
56static unsigned int initial_offset = 0;
38b8102c 57static boolean playing = FALSE;
ef79bbde 58static boolean cddaBigEndian = FALSE;
9a92bffb 59static unsigned int cdda_cur_sector;
60static unsigned int cdda_start_sector;
8aa91443 61/* Frame offset into CD image where pregap data would be found if it was there.
62 * If a game seeks there we must *not* return subchannel data since it's
63 * not in the CD image, so that cdrom code can fake subchannel data instead.
64 * XXX: there could be multiple pregaps but PSX dumps only have one? */
65static unsigned int pregapOffset;
ef79bbde 66
9a92bffb 67// compressed image stuff
68static struct {
69 unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
70 unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
71 unsigned int *index_table;
72 unsigned int index_len;
0877957a 73 unsigned int block_shift;
9a92bffb 74 unsigned int current_block;
75 unsigned int sector_in_blk;
76} *compr_img;
77
78int (*cdimg_read_func)(FILE *f, void *dest, int sector, int offset);
79
ef79bbde
P		 80char* CALLBACK CDR__getDriveLetter(void);
81long CALLBACK CDR__configure(void);
82long CALLBACK CDR__test(void);
83void CALLBACK CDR__about(void);
84long CALLBACK CDR__setfilename(char *filename);
85long CALLBACK CDR__getStatus(struct CdrStat *stat);
86
19c03d80 87static void DecodeRawSubData(void);
88
ef79bbde
P		 89extern void *hCDRDriver;
90
91struct trackinfo {
92 enum {DATA, CDDA} type;
93 char start[3]; // MSF-format
94 char length[3]; // MSF-format
38b8102c 95 FILE *handle; // for multi-track images CDDA
19c03d80 96 int start_offset; // sector offset from start of above file
ef79bbde
P		 97};
98
99#define MAXTRACKS 100 /* How many tracks can a CD hold? */
100
101static int numtracks = 0;
102static struct trackinfo ti[MAXTRACKS];
103
104// get a sector from a msf-array
105static unsigned int msf2sec(char *msf) {
106 return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
107}
108
109static void sec2msf(unsigned int s, char *msf) {
110 msf[0] = s / 75 / 60;
111 s = s - msf[0] * 75 * 60;
112 msf[1] = s / 75;
113 s = s - msf[1] * 75;
114 msf[2] = s;
115}
116
117// divide a string of xx:yy:zz into m, s, f
118static void tok2msf(char *time, char *msf) {
119 char *token;
120
121 token = strtok(time, ":");
122 if (token) {
123 msf[0] = atoi(token);
124 }
125 else {
126 msf[0] = 0;
127 }
128
129 token = strtok(NULL, ":");
130 if (token) {
131 msf[1] = atoi(token);
132 }
133 else {
134 msf[1] = 0;
135 }
136
137 token = strtok(NULL, ":");
138 if (token) {
139 msf[2] = atoi(token);
140 }
141 else {
142 msf[2] = 0;
143 }
144}
145
146#ifndef _WIN32
147static long GetTickCount(void) {
148 static time_t initial_time = 0;
149 struct timeval now;
150
151 gettimeofday(&now, NULL);
152
153 if (initial_time == 0) {
154 initial_time = now.tv_sec;
155 }
156
157 return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
158}
159#endif
160
161// this thread plays audio data
162#ifdef _WIN32
163static void playthread(void *param)
164#else
165static void *playthread(void *param)
166#endif
167{
983a7cfd 168 long osleep, d, t, i, s;
ef79bbde 169 unsigned char tmp;
983a7cfd 170 int ret = 0;
ef79bbde
P		 171
172 t = GetTickCount();
173
174 while (playing) {
9a92bffb 175 s = 0;
176 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
177 d = cdimg_read_func(cddaHandle, sndbuffer + s, cdda_cur_sector, 0);
178 if (d < CD_FRAMESIZE_RAW)
179 break;
ef79bbde 180
9a92bffb 181 s += d;
182 cdda_cur_sector++;
ef79bbde 183 }
19c03d80 184
9a92bffb 185 if (subHandle != NULL) {
186 fseek(subHandle, cdda_cur_sector * SUB_FRAMESIZE, SEEK_SET);
187 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
19c03d80 188
9a92bffb 189 if (subChanRaw) DecodeRawSubData();
ef79bbde
P		 190 }
191
192 if (s == 0) {
193 playing = FALSE;
ef79bbde
P		 194 initial_offset = 0;
195 break;
196 }
197
198 if (!cdr.Muted && playing) {
199 if (cddaBigEndian) {
200 for (i = 0; i < s / 2; i++) {
201 tmp = sndbuffer[i * 2];
202 sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
203 sndbuffer[i * 2 + 1] = tmp;
204 }
205 }
206
983a7cfd 207 do {
208 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
209 if (ret == 0x7761)
210 usleep(6 * 1000);
211 } while (ret == 0x7761 && playing); // rearmed_wait
ef79bbde 212 }
983a7cfd 213
214 if (ret != 0x676f) { // !rearmed_go
215 // do approx sleep
216 long now;
217
218 // HACK: stop feeding data while emu is paused
219 extern int stop;
220 while (stop && playing)
221 usleep(10000);
222
223 now = GetTickCount();
224 osleep = t - now;
225 if (osleep <= 0) {
226 osleep = 1;
227 t = now;
228 }
229 else if (osleep > CDDA_FRAMETIME) {
230 osleep = CDDA_FRAMETIME;
231 t = now;
232 }
233
234 usleep(osleep * 1000);
235 t += CDDA_FRAMETIME;
236 }
237
ef79bbde
P		 238 }
239
240#ifdef _WIN32
241 _endthread();
242#else
243 pthread_exit(0);
244 return NULL;
245#endif
246}
247
248// stop the CDDA playback
249static void stopCDDA() {
250 if (!playing) {
251 return;
252 }
253
254 playing = FALSE;
255#ifdef _WIN32
256 WaitForSingleObject(threadid, INFINITE);
257#else
258 pthread_join(threadid, NULL);
259#endif
ef79bbde
P		 260}
261
262// start the CDDA playback
9a92bffb 263static void startCDDA(unsigned int sector) {
ef79bbde 264 if (playing) {
ef79bbde
P		 265 stopCDDA();
266 }
267
9a92bffb 268 cdda_cur_sector = sector;
ef79bbde
P		 269 playing = TRUE;
270
271#ifdef _WIN32
272 threadid = (HANDLE)_beginthread(playthread, 0, NULL);
273#else
274 pthread_create(&threadid, NULL, playthread, NULL);
275#endif
276}
277
278// this function tries to get the .toc file of the given .bin
279// the necessary data is put into the ti (trackinformation)-array
280static int parsetoc(const char *isofile) {
281 char tocname[MAXPATHLEN];
282 FILE *fi;
283 char linebuf[256], dummy[256], name[256];
284 char *token;
285 char time[20], time2[20];
19c03d80 286 unsigned int t, sector_offs;
ef79bbde
P		 287
288 numtracks = 0;
289
290 // copy name of the iso and change extension from .bin to .toc
291 strncpy(tocname, isofile, sizeof(tocname));
292 tocname[MAXPATHLEN - 1] = '\0';
293 if (strlen(tocname) >= 4) {
294 strcpy(tocname + strlen(tocname) - 4, ".toc");
295 }
296 else {
297 return -1;
298 }
299
300 if ((fi = fopen(tocname, "r")) == NULL) {
301 // try changing extension to .cue (to satisfy some stupid tutorials)
302 strcpy(tocname + strlen(tocname) - 4, ".cue");
303 if ((fi = fopen(tocname, "r")) == NULL) {
304 // if filename is image.toc.bin, try removing .bin (for Brasero)
305 strcpy(tocname, isofile);
306 t = strlen(tocname);
307 if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
308 tocname[t - 4] = '\0';
309 if ((fi = fopen(tocname, "r")) == NULL) {
310 return -1;
311 }
312 }
313 else {
314 return -1;
315 }
316 }
317 }
318
319 memset(&ti, 0, sizeof(ti));
320 cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
321
19c03d80 322 sector_offs = 2 * 75;
323
ef79bbde
P		 324 // parse the .toc file
325 while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
326 // search for tracks
327 strncpy(dummy, linebuf, sizeof(linebuf));
328 token = strtok(dummy, " ");
329
330 if (token == NULL) continue;
331
332 if (!strcmp(token, "TRACK")) {
333 // get type of track
334 token = strtok(NULL, " ");
335 numtracks++;
336
337 if (!strncmp(token, "MODE2_RAW", 9)) {
338 ti[numtracks].type = DATA;
339 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
340
341 // check if this image contains mixed subchannel data
342 token = strtok(NULL, " ");
343 if (token != NULL && !strncmp(token, "RW_RAW", 6)) {
344 subChanMixed = TRUE;
345 subChanRaw = TRUE;
346 }
347 }
348 else if (!strncmp(token, "AUDIO", 5)) {
349 ti[numtracks].type = CDDA;
350 }
351 }
352 else if (!strcmp(token, "DATAFILE")) {
353 if (ti[numtracks].type == CDDA) {
354 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
355 t /= CD_FRAMESIZE_RAW + (subChanMixed ? SUB_FRAMESIZE : 0);
19c03d80 356 ti[numtracks].start_offset = t;
357 t += sector_offs;
ef79bbde
P		 358 sec2msf(t, (char *)&ti[numtracks].start);
359 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
360 }
361 else {
362 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
363 tok2msf((char *)&time, (char *)&ti[numtracks].length);
364 }
365 }
366 else if (!strcmp(token, "FILE")) {
367 sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
368 tok2msf((char *)&time, (char *)&ti[numtracks].start);
369 t /= CD_FRAMESIZE_RAW + (subChanMixed ? SUB_FRAMESIZE : 0);
19c03d80 370 ti[numtracks].start_offset = t;
371 t += msf2sec(ti[numtracks].start) + sector_offs;
ef79bbde
P		 372 sec2msf(t, (char *)&ti[numtracks].start);
373 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
374 }
19c03d80 375 else if (!strcmp(token, "ZERO")) {
376 sscanf(linebuf, "ZERO AUDIO RW_RAW %8s", time);
377 tok2msf((char *)&time, dummy);
378 sector_offs += msf2sec(dummy);
8aa91443 379 if (numtracks > 1) {
380 t = ti[numtracks - 1].start_offset;
381 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
382 }
19c03d80 383 }
ef79bbde
P		 384 }
385
386 fclose(fi);
387
388 return 0;
389}
390
391// this function tries to get the .cue file of the given .bin
392// the necessary data is put into the ti (trackinformation)-array
393static int parsecue(const char *isofile) {
394 char cuename[MAXPATHLEN];
38b8102c 395 char filepath[MAXPATHLEN];
396 char *incue_fname;
ef79bbde
P		 397 FILE *fi;
398 char *token;
399 char time[20];
400 char *tmp;
19c03d80 401 char linebuf[256], tmpb[256], dummy[256];
38b8102c 402 unsigned int incue_max_len;
19c03d80 403 unsigned int t, file_len, sector_offs;
ef79bbde
P		 404
405 numtracks = 0;
406
407 // copy name of the iso and change extension from .bin to .cue
408 strncpy(cuename, isofile, sizeof(cuename));
409 cuename[MAXPATHLEN - 1] = '\0';
410 if (strlen(cuename) >= 4) {
411 strcpy(cuename + strlen(cuename) - 4, ".cue");
412 }
413 else {
414 return -1;
415 }
416
417 if ((fi = fopen(cuename, "r")) == NULL) {
418 return -1;
419 }
420
421 // Some stupid tutorials wrongly tell users to use cdrdao to rip a
422 // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
423 // that...
424 if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
425 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
426 // Don't proceed further, as this is actually a .toc file rather
427 // than a .cue file.
428 fclose(fi);
429 return parsetoc(isofile);
430 }
431 fseek(fi, 0, SEEK_SET);
432 }
433
38b8102c 434 // build a path for files referenced in .cue
435 strncpy(filepath, cuename, sizeof(filepath));
436 tmp = strrchr(filepath, '/') + 1;
437 if (tmp == NULL)
438 tmp = strrchr(filepath, '\\') + 1;
439 if (tmp == NULL)
440 tmp = filepath;
441 *tmp = 0;
442 filepath[sizeof(filepath) - 1] = 0;
443 incue_fname = tmp;
444 incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
445
ef79bbde
P		 446 memset(&ti, 0, sizeof(ti));
447
19c03d80 448 file_len = 0;
449 sector_offs = 2 * 75;
450
ef79bbde
P		 451 while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
452 strncpy(dummy, linebuf, sizeof(linebuf));
453 token = strtok(dummy, " ");
454
455 if (token == NULL) {
456 continue;
457 }
458
19c03d80 459 if (!strcmp(token, "TRACK")) {
ef79bbde
P		 460 numtracks++;
461
462 if (strstr(linebuf, "AUDIO") != NULL) {
463 ti[numtracks].type = CDDA;
464 }
465 else if (strstr(linebuf, "MODE1/2352") != NULL || strstr(linebuf, "MODE2/2352") != NULL) {
466 ti[numtracks].type = DATA;
467 }
468 }
469 else if (!strcmp(token, "INDEX")) {
19c03d80 470 sscanf(linebuf, " INDEX %02d %8s", &t, time);
471 tok2msf(time, (char *)&ti[numtracks].start);
ef79bbde 472
19c03d80 473 t = msf2sec(ti[numtracks].start);
474 ti[numtracks].start_offset = t;
475 t += sector_offs;
ef79bbde 476 sec2msf(t, ti[numtracks].start);
19c03d80 477
478 // default track length to file length
479 t = file_len - ti[numtracks].start_offset;
480 sec2msf(t, ti[numtracks].length);
481
482 if (numtracks > 1 && ti[numtracks].handle == NULL) {
483 // this track uses the same file as the last,
484 // start of this track is last track's end
485 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
486 sec2msf(t, ti[numtracks - 1].length);
38b8102c 487 }
8aa91443 488 if (numtracks > 1 && pregapOffset == -1)
489 pregapOffset = ti[numtracks].start_offset;
19c03d80 490 }
491 else if (!strcmp(token, "PREGAP")) {
492 if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
493 tok2msf(time, dummy);
494 sector_offs += msf2sec(dummy);
38b8102c 495 }
8aa91443 496 pregapOffset = -1; // mark to fill track start_offset
19c03d80 497 }
498 else if (!strcmp(token, "FILE")) {
499 sscanf(linebuf, " FILE \"%[^\"]\"", tmpb);
500
501 // absolute path?
502 ti[numtracks + 1].handle = fopen(tmpb, "rb");
503 if (ti[numtracks + 1].handle == NULL) {
504 // relative to .cue?
505 tmp = strrchr(tmpb, '\\');
506 if (tmp == NULL)
507 tmp = strrchr(tmpb, '/');
38b8102c 508 if (tmp != NULL)
19c03d80 509 tmp++;
510 else
511 tmp = tmpb;
512 strncpy(incue_fname, tmp, incue_max_len);
513 ti[numtracks + 1].handle = fopen(filepath, "rb");
38b8102c 514 }
ef79bbde 515
19c03d80 516 // update global offset if this is not first file in this .cue
517 if (numtracks + 1 > 1)
518 sector_offs += file_len;
519
520 file_len = 0;
38b8102c 521 if (ti[numtracks + 1].handle == NULL) {
19c03d80 522 SysPrintf(_("\ncould not open: %s\n"), filepath);
523 continue;
38b8102c 524 }
19c03d80 525 fseek(ti[numtracks + 1].handle, 0, SEEK_END);
526 file_len = ftell(ti[numtracks + 1].handle) / 2352;
527
528 if (numtracks == 0 && strlen(isofile) >= 4 &&
529 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
530 {
38b8102c 531 // user selected .cue as image file, use it's data track instead
532 fclose(cdHandle);
533 cdHandle = fopen(filepath, "rb");
ef79bbde
P		 534 }
535 }
536 }
537
538 fclose(fi);
539
ef79bbde
P		 540 return 0;
541}
542
543// this function tries to get the .ccd file of the given .img
544// the necessary data is put into the ti (trackinformation)-array
545static int parseccd(const char *isofile) {
546 char ccdname[MAXPATHLEN];
547 FILE *fi;
548 char linebuf[256];
549 unsigned int t;
550
551 numtracks = 0;
552
553 // copy name of the iso and change extension from .img to .ccd
554 strncpy(ccdname, isofile, sizeof(ccdname));
555 ccdname[MAXPATHLEN - 1] = '\0';
556 if (strlen(ccdname) >= 4) {
557 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
558 }
559 else {
560 return -1;
561 }
562
563 if ((fi = fopen(ccdname, "r")) == NULL) {
564 return -1;
565 }
566
567 memset(&ti, 0, sizeof(ti));
568
569 while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
570 if (!strncmp(linebuf, "[TRACK", 6)){
571 numtracks++;
572 }
573 else if (!strncmp(linebuf, "MODE=", 5)) {
574 sscanf(linebuf, "MODE=%d", &t);
575 ti[numtracks].type = ((t == 0) ? CDDA : DATA);
576 }
577 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
578 sscanf(linebuf, "INDEX 1=%d", &t);
579 sec2msf(t + 2 * 75, ti[numtracks].start);
19c03d80 580 ti[numtracks].start_offset = t;
ef79bbde
P		 581
582 // If we've already seen another track, this is its end
583 if (numtracks > 1) {
584 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
585 sec2msf(t, ti[numtracks - 1].length);
586 }
587 }
588 }
589
590 fclose(fi);
591
592 // Fill out the last track's end based on size
593 if (numtracks >= 1) {
594 fseek(cdHandle, 0, SEEK_END);
595 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
596 sec2msf(t, ti[numtracks].length);
597 }
598
599 return 0;
600}
601
602// this function tries to get the .mds file of the given .mdf
603// the necessary data is put into the ti (trackinformation)-array
604static int parsemds(const char *isofile) {
605 char mdsname[MAXPATHLEN];
606 FILE *fi;
607 unsigned int offset, extra_offset, l, i;
608 unsigned short s;
609
610 numtracks = 0;
611
612 // copy name of the iso and change extension from .mdf to .mds
613 strncpy(mdsname, isofile, sizeof(mdsname));
614 mdsname[MAXPATHLEN - 1] = '\0';
615 if (strlen(mdsname) >= 4) {
616 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
617 }
618 else {
619 return -1;
620 }
621
622 if ((fi = fopen(mdsname, "rb")) == NULL) {
623 return -1;
624 }
625
626 memset(&ti, 0, sizeof(ti));
627
628 // check if it's a valid mds file
629 fread(&i, 1, sizeof(unsigned int), fi);
630 i = SWAP32(i);
631 if (i != 0x4944454D) {
632 // not an valid mds file
633 fclose(fi);
634 return -1;
635 }
636
637 // get offset to session block
638 fseek(fi, 0x50, SEEK_SET);
639 fread(&offset, 1, sizeof(unsigned int), fi);
640 offset = SWAP32(offset);
641
642 // get total number of tracks
643 offset += 14;
644 fseek(fi, offset, SEEK_SET);
645 fread(&s, 1, sizeof(unsigned short), fi);
646 s = SWAP16(s);
647 numtracks = s;
648
649 // get offset to track blocks
650 fseek(fi, 4, SEEK_CUR);
651 fread(&offset, 1, sizeof(unsigned int), fi);
652 offset = SWAP32(offset);
653
654 // skip lead-in data
655 while (1) {
656 fseek(fi, offset + 4, SEEK_SET);
657 if (fgetc(fi) < 0xA0) {
658 break;
659 }
660 offset += 0x50;
661 }
662
663 // check if the image contains mixed subchannel data
664 fseek(fi, offset + 1, SEEK_SET);
665 subChanMixed = (fgetc(fi) ? TRUE : FALSE);
666
667 // read track data
668 for (i = 1; i <= numtracks; i++) {
669 fseek(fi, offset, SEEK_SET);
670
671 // get the track type
672 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
673 fseek(fi, 8, SEEK_CUR);
674
675 // get the track starting point
676 ti[i].start[0] = fgetc(fi);
677 ti[i].start[1] = fgetc(fi);
678 ti[i].start[2] = fgetc(fi);
679
ef79bbde
P		 680 fread(&extra_offset, 1, sizeof(unsigned int), fi);
681 extra_offset = SWAP32(extra_offset);
682
19c03d80 683 // get track start offset (in .mdf)
684 fseek(fi, offset + 0x28, SEEK_SET);
685 fread(&l, 1, sizeof(unsigned int), fi);
686 l = SWAP32(l);
687 ti[i].start_offset = l / CD_FRAMESIZE_RAW;
688
8aa91443 689 // get pregap
690 fseek(fi, extra_offset, SEEK_SET);
691 fread(&l, 1, sizeof(unsigned int), fi);
692 l = SWAP32(l);
693 if (l != 0 && i > 1)
694 pregapOffset = ti[i].start_offset;
695
696 // get the track length
697 fread(&l, 1, sizeof(unsigned int), fi);
698 l = SWAP32(l);
699 sec2msf(l, ti[i].length);
700
ef79bbde
P		 701 offset += 0x50;
702 }
703
704 fclose(fi);
705 return 0;
706}
707
0877957a 708static int handlepbp(const char *isofile) {
9a92bffb 709 struct {
710 unsigned int sig;
711 unsigned int dontcare[8];
712 unsigned int psar_offs;
713 } pbp_hdr;
714 struct {
715 unsigned char type;
716 unsigned char pad0;
717 unsigned char track;
718 char index0[3];
719 char pad1;
720 char index1[3];
721 } toc_entry;
722 struct {
723 unsigned int offset;
724 unsigned int size;
725 unsigned int dontcare[6];
726 } index_entry;
727 char psar_sig[9];
728 unsigned int t, cd_length, cdimg_base;
729 const char *ext = NULL;
730 int i, ret;
731
732 if (strlen(isofile) >= 4)
733 ext = isofile + strlen(isofile) - 4;
734 if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
735 return -1;
736
737 numtracks = 0;
738
739 ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
740 if (ret != sizeof(pbp_hdr)) {
741 fprintf(stderr, "failed to read pbp\n");
742 goto fail_io;
743 }
744
745 ret = fseek(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
746 if (ret != 0) {
747 fprintf(stderr, "failed to seek to %x\n", pbp_hdr.psar_offs);
748 goto fail_io;
749 }
750
751 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
752 psar_sig[8] = 0;
753 if (strcmp(psar_sig, "PSISOIMG") != 0) {
754 fprintf(stderr, "bad psar_sig: %s\n", psar_sig);
755 goto fail_io;
756 }
757
758 // seek to TOC
759 ret = fseek(cdHandle, pbp_hdr.psar_offs + 0x800, SEEK_SET);
760 if (ret != 0) {
761 fprintf(stderr, "failed to seek to %x\n", pbp_hdr.psar_offs);
762 goto fail_io;
763 }
764
765 // first 3 entries are special
766 fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
767 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
768 numtracks = btoi(toc_entry.index1[0]);
769
770 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
771 cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
772 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
773
774 for (i = 1; i <= numtracks; i++) {
775 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
776
777 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
778
779 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
780 btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
781 ti[i].start[0] = btoi(toc_entry.index1[0]);
782 ti[i].start[1] = btoi(toc_entry.index1[1]);
783 ti[i].start[2] = btoi(toc_entry.index1[2]);
784
785 if (i > 1) {
786 t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
787 sec2msf(t, ti[i - 1].length);
788 }
789 }
790 t = cd_length - ti[numtracks].start_offset;
791 sec2msf(t, ti[numtracks].length);
792
793 // seek to ISO index
794 ret = fseek(cdHandle, pbp_hdr.psar_offs + 0x4000, SEEK_SET);
795 if (ret != 0) {
796 fprintf(stderr, "failed to seek to ISO index\n");
797 goto fail_io;
798 }
799
800 compr_img = calloc(1, sizeof(*compr_img));
801 if (compr_img == NULL)
802 goto fail_io;
803
0877957a 804 compr_img->block_shift = 4;
9a92bffb 805 compr_img->current_block = (unsigned int)-1;
806
807 compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
808 compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
809 if (compr_img->index_table == NULL)
810 goto fail_io;
811
812 cdimg_base = pbp_hdr.psar_offs + 0x100000;
813 for (i = 0; i < compr_img->index_len; i++) {
814 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
815 if (ret != sizeof(index_entry)) {
816 fprintf(stderr, "failed to read index_entry #%d\n", i);
817 goto fail_index;
818 }
819
820 if (index_entry.size == 0)
821 break;
822
823 compr_img->index_table[i] = cdimg_base + index_entry.offset;
824 }
825 compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
826
827 return 0;
828
829fail_index:
830 free(compr_img->index_table);
831 compr_img->index_table = NULL;
832fail_io:
0877957a 833 if (compr_img != NULL) {
834 free(compr_img);
835 compr_img = NULL;
836 }
837 return -1;
838}
839
840static int handlecbin(const char *isofile) {
841 struct
842 {
843 char magic[4];
844 unsigned int header_size;
845 unsigned long long total_bytes;
846 unsigned int block_size;
847 unsigned char ver; // 1
848 unsigned char align;
849 unsigned char rsv_06[2];
850 } ciso_hdr;
851 const char *ext = NULL;
852 unsigned int index, plain;
853 int i, ret;
854
855 if (strlen(isofile) >= 5)
856 ext = isofile + strlen(isofile) - 5;
857 if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
858 return -1;
859
860 ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
861 if (ret != sizeof(ciso_hdr)) {
862 fprintf(stderr, "failed to read ciso header\n");
863 return -1;
864 }
865
866 if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
867 fprintf(stderr, "bad ciso header\n");
868 return -1;
869 }
870 if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
871 ret = fseek(cdHandle, ciso_hdr.header_size, SEEK_SET);
872 if (ret != 0) {
873 fprintf(stderr, "failed to seek to %x\n", ciso_hdr.header_size);
874 return -1;
875 }
876 }
877
878 compr_img = calloc(1, sizeof(*compr_img));
879 if (compr_img == NULL)
880 goto fail_io;
881
882 compr_img->block_shift = 0;
883 compr_img->current_block = (unsigned int)-1;
884
885 compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
886 compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
887 if (compr_img->index_table == NULL)
888 goto fail_io;
889
890 ret = fread(compr_img->index_table, sizeof(compr_img->index_table[0]), compr_img->index_len, cdHandle);
891 if (ret != compr_img->index_len) {
892 fprintf(stderr, "failed to read index table\n");
893 goto fail_index;
894 }
895
896 for (i = 0; i < compr_img->index_len + 1; i++) {
897 index = compr_img->index_table[i];
898 plain = index & 0x80000000;
899 index &= 0x7fffffff;
900 compr_img->index_table[i] = (index << ciso_hdr.align) | plain;
901 }
902 if ((long long)index << ciso_hdr.align >= 0x80000000ll)
903 fprintf(stderr, "warning: ciso img too large, expect problems\n");
904
905 return 0;
906
907fail_index:
908 free(compr_img->index_table);
909 compr_img->index_table = NULL;
910fail_io:
911 if (compr_img != NULL) {
912 free(compr_img);
913 compr_img = NULL;
914 }
9a92bffb 915 return -1;
916}
917
ef79bbde
P		 918// this function tries to get the .sub file of the given .img
919static int opensubfile(const char *isoname) {
920 char subname[MAXPATHLEN];
921
922 // copy name of the iso and change extension from .img to .sub
923 strncpy(subname, isoname, sizeof(subname));
924 subname[MAXPATHLEN - 1] = '\0';
925 if (strlen(subname) >= 4) {
926 strcpy(subname + strlen(subname) - 4, ".sub");
927 }
928 else {
929 return -1;
930 }
931
932 subHandle = fopen(subname, "rb");
933 if (subHandle == NULL) {
934 return -1;
935 }
936
937 return 0;
938}
939
ae4e7dc9 940static int opensbifile(const char *isoname) {
941 char sbiname[MAXPATHLEN];
942 int s;
943
944 strncpy(sbiname, isoname, sizeof(sbiname));
945 sbiname[MAXPATHLEN - 1] = '\0';
946 if (strlen(sbiname) >= 4) {
947 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
948 }
949 else {
950 return -1;
951 }
952
953 fseek(cdHandle, 0, SEEK_END);
954 s = ftell(cdHandle) / 2352;
955
956 return LoadSBI(sbiname, s);
957}
958
9a92bffb 959static int cdread_normal(FILE *f, void *dest, int sector, int offset)
960{
961 fseek(f, sector * CD_FRAMESIZE_RAW + offset, SEEK_SET);
962 return fread(dest, 1, CD_FRAMESIZE_RAW - offset, f);
963}
964
965static int cdread_sub_mixed(FILE *f, void *dest, int sector, int offset)
966{
967 int ret;
968
969 fseek(f, sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE) + offset, SEEK_SET);
970 ret = fread(dest, 1, CD_FRAMESIZE_RAW - offset, f);
971 fread(subbuffer, 1, SUB_FRAMESIZE, f);
972
973 if (subChanRaw) DecodeRawSubData();
974
975 return ret;
976}
977
978static int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
979{
980 static z_stream z;
981 int ret = 0;
982
983 if (z.zalloc == NULL) {
984 // XXX: one-time leak here..
985 z.next_in = Z_NULL;
986 z.avail_in = 0;
987 z.zalloc = Z_NULL;
988 z.zfree = Z_NULL;
989 z.opaque = Z_NULL;
990 ret = inflateInit2(&z, -15);
991 }
992 else
993 ret = inflateReset(&z);
994 if (ret != Z_OK)
995 return ret;
996
997 z.next_in = in;
998 z.avail_in = in_size;
999 z.next_out = out;
1000 z.avail_out = *out_size;
1001
1002 ret = inflate(&z, Z_NO_FLUSH);
1003 //inflateEnd(&z);
1004
1005 *out_size -= z.avail_out;
1006 return ret == 1 ? 0 : ret;
1007}
1008
1009static int cdread_compressed(FILE *f, void *dest, int sector, int offset)
1010{
0877957a 1011 unsigned long cdbuffer_size, cdbuffer_size_expect;
9a92bffb 1012 unsigned int start_byte, size;
0877957a 1013 int is_compressed;
9a92bffb 1014 int ret, block;
1015
0877957a 1016 block = sector >> compr_img->block_shift;
1017 compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
9a92bffb 1018
1019 if (block == compr_img->current_block) {
1020 //printf("hit sect %d\n", sector);
1021 goto finish;
1022 }
1023
1024 if (sector >= compr_img->index_len * 16) {
1025 fprintf(stderr, "sector %d is past img end\n", sector);
1026 return -1;
1027 }
1028
0877957a 1029 start_byte = compr_img->index_table[block] & 0x7fffffff;
9a92bffb 1030 if (fseek(cdHandle, start_byte, SEEK_SET) != 0) {
1031 fprintf(stderr, "seek error for block %d at %x: ",
1032 block, start_byte);
1033 perror(NULL);
1034 return -1;
1035 }
1036
0877957a 1037 is_compressed = !(compr_img->index_table[block] & 0x80000000);
1038 size = (compr_img->index_table[block + 1] & 0x7fffffff) - start_byte;
9a92bffb 1039 if (size > sizeof(compr_img->buff_compressed)) {
1040 fprintf(stderr, "block %d is too large: %u\n", block, size);
1041 return -1;
1042 }
1043
0877957a 1044 if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1045 1, size, cdHandle) != size) {
9a92bffb 1046 fprintf(stderr, "read error for block %d at %x: ", block, start_byte);
1047 perror(NULL);
1048 return -1;
1049 }
1050
0877957a 1051 if (is_compressed) {
1052 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1053 cdbuffer_size = cdbuffer_size_expect;
1054 ret = uncompress2(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1055 if (ret != 0) {
1056 fprintf(stderr, "uncompress failed with %d for block %d, sector %d\n",
1057 ret, block, sector);
1058 return -1;
1059 }
1060 if (cdbuffer_size != cdbuffer_size_expect)
1061 fprintf(stderr, "cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1062 cdbuffer_size_expect, sector);
9a92bffb 1063 }
9a92bffb 1064
1065 // done at last!
1066 compr_img->current_block = block;
1067
1068finish:
1069 if (dest != cdbuffer) // copy avoid HACK
1070 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk] + offset,
1071 CD_FRAMESIZE_RAW - offset);
1072 return CD_FRAMESIZE_RAW - offset;
1073}
1074
1075static int cdread_2048(FILE *f, void *dest, int sector, int offset)
1076{
1077 int ret;
1078
1079 fseek(f, sector * 2048, SEEK_SET);
1080 ret = fread((char *)dest + 12, 1, 2048, f);
1081
1082 // not really necessary, fake mode 2 header
1083 memset(cdbuffer, 0, 12);
1084 sec2msf(sector + 2 * 75, (char *)cdbuffer);
1085 cdbuffer[3] = 1;
1086
1087 return ret;
1088}
1089
1090static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1091 return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1092}
1093
1094static unsigned char * CALLBACK ISOgetBuffer(void) {
1095 return cdbuffer;
1096}
1097
ef79bbde
P		 1098static void PrintTracks(void) {
1099 int i;
1100
1101 for (i = 1; i <= numtracks; i++) {
1102 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1103 i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1104 ti[i].start[0], ti[i].start[1], ti[i].start[2],
1105 ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1106 }
1107}
1108
1109// This function is invoked by the front-end when opening an ISO
1110// file for playback
1111static long CALLBACK ISOopen(void) {
9a92bffb 1112 boolean isMode1ISO = FALSE;
1113
ef79bbde
P		 1114 if (cdHandle != NULL) {
1115 return 0; // it's already open
1116 }
1117
1118 cdHandle = fopen(GetIsoFile(), "rb");
1119 if (cdHandle == NULL) {
1120 return -1;
1121 }
1122
1123 SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1124
1125 cddaBigEndian = FALSE;
1126 subChanMixed = FALSE;
1127 subChanRaw = FALSE;
8aa91443 1128 pregapOffset = 0;
ef79bbde 1129
9a92bffb 1130 CDR_getBuffer = ISOgetBuffer;
1131 cdimg_read_func = cdread_normal;
1132
ef79bbde
P		 1133 if (parsecue(GetIsoFile()) == 0) {
1134 SysPrintf("[+cue]");
1135 }
1136 else if (parsetoc(GetIsoFile()) == 0) {
1137 SysPrintf("[+toc]");
1138 }
1139 else if (parseccd(GetIsoFile()) == 0) {
1140 SysPrintf("[+ccd]");
1141 }
1142 else if (parsemds(GetIsoFile()) == 0) {
1143 SysPrintf("[+mds]");
1144 }
0877957a 1145 if (handlepbp(GetIsoFile()) == 0) {
9a92bffb 1146 SysPrintf("[pbp]");
1147 CDR_getBuffer = ISOgetBuffer_compr;
1148 cdimg_read_func = cdread_compressed;
1149 }
0877957a 1150 else if (handlecbin(GetIsoFile()) == 0) {
1151 SysPrintf("[cbin]");
1152 CDR_getBuffer = ISOgetBuffer_compr;
1153 cdimg_read_func = cdread_compressed;
1154 }
ef79bbde
P		 1155
1156 if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1157 SysPrintf("[+sub]");
1158 }
ae4e7dc9 1159 if (opensbifile(GetIsoFile()) == 0) {
1160 SysPrintf("[+sbi]");
1161 }
ef79bbde 1162
9a92bffb 1163 // guess whether it is mode1/2048
1164 fseek(cdHandle, 0, SEEK_END);
1165 if (ftell(cdHandle) % 2048 == 0) {
1166 unsigned int modeTest = 0;
1167 fseek(cdHandle, 0, SEEK_SET);
1168 fread(&modeTest, 4, 1, cdHandle);
1169 if (SWAP32(modeTest) != 0xffffff00) {
1170 SysPrintf("[2048]");
1171 isMode1ISO = TRUE;
1172 }
1173 }
1174 fseek(cdHandle, 0, SEEK_SET);
1175
ef79bbde
P		 1176 SysPrintf(".\n");
1177
1178 PrintTracks();
1179
9a92bffb 1180 if (subChanMixed)
1181 cdimg_read_func = cdread_sub_mixed;
1182 else if (isMode1ISO)
1183 cdimg_read_func = cdread_2048;
1184
38b8102c 1185 // make sure we have another handle open for cdda
1186 if (numtracks > 1 && ti[1].handle == NULL) {
1187 ti[1].handle = fopen(GetIsoFile(), "rb");
1188 }
9a92bffb 1189 cdda_cur_sector = cdda_start_sector = 0;
38b8102c 1190
ef79bbde
P		 1191 return 0;
1192}
1193
1194static long CALLBACK ISOclose(void) {
38b8102c 1195 int i;
1196
ef79bbde
P		 1197 if (cdHandle != NULL) {
1198 fclose(cdHandle);
1199 cdHandle = NULL;
1200 }
1201 if (subHandle != NULL) {
1202 fclose(subHandle);
1203 subHandle = NULL;
1204 }
1205 stopCDDA();
38b8102c 1206 cddaHandle = NULL;
1207
9a92bffb 1208 if (compr_img != NULL) {
1209 free(compr_img->index_table);
1210 free(compr_img);
1211 compr_img = NULL;
1212 }
1213
38b8102c 1214 for (i = 1; i <= numtracks; i++) {
1215 if (ti[i].handle != NULL) {
1216 fclose(ti[i].handle);
1217 ti[i].handle = NULL;
1218 }
1219 }
1220 numtracks = 0;
ae4e7dc9 1221 UnloadSBI();
38b8102c 1222
1223 return 0;
1224}
1225
1226static long CALLBACK ISOinit(void) {
1227 assert(cdHandle == NULL);
1228 assert(subHandle == NULL);
1229
1230 return 0; // do nothing
1231}
1232
1233static long CALLBACK ISOshutdown(void) {
1234 ISOclose();
ef79bbde
P		 1235 return 0;
1236}
1237
1238// return Starting and Ending Track
1239// buffer:
1240// byte 0 - start track
1241// byte 1 - end track
1242static long CALLBACK ISOgetTN(unsigned char *buffer) {
1243 buffer[0] = 1;
1244
1245 if (numtracks > 0) {
1246 buffer[1] = numtracks;
1247 }
1248 else {
1249 buffer[1] = 1;
1250 }
1251
1252 return 0;
1253}
1254
1255// return Track Time
1256// buffer:
1257// byte 0 - frame
1258// byte 1 - second
1259// byte 2 - minute
1260static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
858ad511 1261 if (track == 0) {
1262 // CD length according pcsxr-svn (done a bit different here)
1263 unsigned int sect;
1264 unsigned char time[3];
1265 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
ab948f7e 1266 sec2msf(sect, (char *)time);
858ad511 1267 buffer[2] = time[0];
1268 buffer[1] = time[1];
1269 buffer[0] = time[2];
1270 }
1271 else if (numtracks > 0 && track <= numtracks) {
ef79bbde
P		 1272 buffer[2] = ti[track].start[0];
1273 buffer[1] = ti[track].start[1];
1274 buffer[0] = ti[track].start[2];
1275 }
1276 else {
1277 buffer[2] = 0;
1278 buffer[1] = 2;
1279 buffer[0] = 0;
1280 }
1281
1282 return 0;
1283}
1284
1285// decode 'raw' subchannel data ripped by cdrdao
1286static void DecodeRawSubData(void) {
1287 unsigned char subQData[12];
1288 int i;
1289
1290 memset(subQData, 0, sizeof(subQData));
1291
1292 for (i = 0; i < 8 * 12; i++) {
1293 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1294 subQData[i >> 3] |= (1 << (7 - (i & 7)));
1295 }
1296 }
1297
1298 memcpy(&subbuffer[12], subQData, 12);
1299}
1300
1301// read track
1302// time: byte 0 - minute; byte 1 - second; byte 2 - frame
1303// uses bcd format
1304static long CALLBACK ISOreadTrack(unsigned char *time) {
19c03d80 1305 int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1306
ef79bbde
P		 1307 if (cdHandle == NULL) {
1308 return -1;
1309 }
1310
8aa91443 1311 if (pregapOffset) {
1312 subChanMissing = FALSE;
1313 if (sector >= pregapOffset) {
1314 sector -= 2 * 75;
1315 if (sector < pregapOffset)
1316 subChanMissing = TRUE;
1317 }
1318 }
1319
9a92bffb 1320 cdimg_read_func(cdHandle, cdbuffer, sector, 12);
ef79bbde 1321
9a92bffb 1322 if (subHandle != NULL) {
1323 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1324 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
ef79bbde 1325
9a92bffb 1326 if (subChanRaw) DecodeRawSubData();
ef79bbde
P		 1327 }
1328
1329 return 0;
1330}
1331
ef79bbde
P		 1332// plays cdda audio
1333// sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1334// does NOT uses bcd format
1335static long CALLBACK ISOplay(unsigned char *time) {
19c03d80 1336 unsigned int i, abs_sect;
1337 int file_sect;
38b8102c 1338
7b8da7ab 1339 if (numtracks <= 1)
1340 return 0;
1341
38b8102c 1342 // find the track
19c03d80 1343 abs_sect = msf2sec((char *)time);
38b8102c 1344 for (i = numtracks; i > 1; i--)
19c03d80 1345 if (msf2sec(ti[i].start) <= abs_sect + 2 * 75)
38b8102c 1346 break;
1347
19c03d80 1348 file_sect = ti[i].start_offset + (abs_sect - msf2sec(ti[i].start));
1349 if (file_sect < 0)
1350 file_sect = 0;
1351
38b8102c 1352 // find the file that contains this track
1353 for (; i > 1; i--)
1354 if (ti[i].handle != NULL)
1355 break;
1356
9a92bffb 1357 cdda_start_sector = abs_sect - file_sect;
38b8102c 1358 cddaHandle = ti[i].handle;
1359
8aa91443 1360 if (pregapOffset && (unsigned int)(pregapOffset - file_sect) < 2 * 75) {
1361 // get out of the missing pregap to avoid noise
1362 file_sect = pregapOffset;
1363 }
1364
ef79bbde 1365 if (SPU_playCDDAchannel != NULL) {
9a92bffb 1366 startCDDA(file_sect);
ef79bbde
P		 1367 }
1368 return 0;
1369}
1370
1371// stops cdda audio
1372static long CALLBACK ISOstop(void) {
1373 stopCDDA();
1374 return 0;
1375}
1376
1377// gets subchannel data
1378static unsigned char* CALLBACK ISOgetBufferSub(void) {
8aa91443 1379 if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
ef79bbde
P		 1380 return subbuffer;
1381 }
1382
1383 return NULL;
1384}
1385
1386static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1387 int sec;
1388
1389 CDR__getStatus(stat);
1390
1391 if (playing) {
1392 stat->Type = 0x02;
1393 stat->Status |= 0x80;
ef79bbde
P		 1394 }
1395 else {
1396 stat->Type = 0x01;
1397 }
1398
9a92bffb 1399 sec = cdda_start_sector + cdda_cur_sector;
858ad511 1400 sec2msf(sec, (char *)stat->Time);
1401
ef79bbde
P		 1402 return 0;
1403}
1404
1405void cdrIsoInit(void) {
1406 CDR_init = ISOinit;
1407 CDR_shutdown = ISOshutdown;
1408 CDR_open = ISOopen;
1409 CDR_close = ISOclose;
1410 CDR_getTN = ISOgetTN;
1411 CDR_getTD = ISOgetTD;
1412 CDR_readTrack = ISOreadTrack;
1413 CDR_getBuffer = ISOgetBuffer;
1414 CDR_play = ISOplay;
1415 CDR_stop = ISOstop;
1416 CDR_getBufferSub = ISOgetBufferSub;
1417 CDR_getStatus = ISOgetStatus;
1418
1419 CDR_getDriveLetter = CDR__getDriveLetter;
1420 CDR_configure = CDR__configure;
1421 CDR_test = CDR__test;
1422 CDR_about = CDR__about;
1423 CDR_setfilename = CDR__setfilename;
1424
1425 numtracks = 0;
1426}
1427
1428int cdrIsoActive(void) {
1429 return (cdHandle != NULL);
1430}
ARM optimized PCSX fork