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cdriso: merge from pcsxr r90558
[pcsx_rearmed.git] / libpcsxcore / cdriso.c
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1/***************************************************************************
2 * Copyright (C) 2007 PCSX-df Team *
3 * Copyright (C) 2009 Wei Mingzhi *
4 * Copyright (C) 2012 notaz *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the *
18 * Free Software Foundation, Inc., *
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
20 ***************************************************************************/
21
22#include "psxcommon.h"
23#include "plugins.h"
24#include "cdrom.h"
25#include "cdriso.h"
26#include "ppf.h"
27
28#ifdef _WIN32
29#include <process.h>
30#include <windows.h>
31#define strcasecmp _stricmp
32#else
33#include <pthread.h>
34#include <sys/time.h>
35#include <unistd.h>
36#endif
37#include <errno.h>
38#include <zlib.h>
39
40unsigned int cdrIsoMultidiskCount;
41unsigned int cdrIsoMultidiskSelect;
42
43static FILE *cdHandle = NULL;
44static FILE *cddaHandle = NULL;
45static FILE *subHandle = NULL;
46
47static boolean subChanMixed = FALSE;
48static boolean subChanRaw = FALSE;
49static boolean subChanMissing = FALSE;
50
51static boolean multifile = FALSE;
52
53static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
54static unsigned char subbuffer[SUB_FRAMESIZE];
55
56static unsigned char sndbuffer[CD_FRAMESIZE_RAW * 10];
57
58#define CDDA_FRAMETIME (1000 * (sizeof(sndbuffer) / CD_FRAMESIZE_RAW) / 75)
59
60#ifdef _WIN32
61static HANDLE threadid;
62#else
63static pthread_t threadid;
64#endif
65static unsigned int initial_offset = 0;
66static boolean playing = FALSE;
67static boolean cddaBigEndian = FALSE;
68// cdda sectors in toc, byte offset in file
69static unsigned int cdda_cur_sector;
70static unsigned int cdda_first_sector;
71static unsigned int cdda_file_offset;
72/* Frame offset into CD image where pregap data would be found if it was there.
73 * If a game seeks there we must *not* return subchannel data since it's
74 * not in the CD image, so that cdrom code can fake subchannel data instead.
75 * XXX: there could be multiple pregaps but PSX dumps only have one? */
76static unsigned int pregapOffset;
77
78#define cddaCurPos cdda_cur_sector
79
80// compressed image stuff
81static struct {
82 unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
83 unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
84 unsigned int *index_table;
85 unsigned int index_len;
86 unsigned int block_shift;
87 unsigned int current_block;
88 unsigned int sector_in_blk;
89} *compr_img;
90
91int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
92
93char* CALLBACK CDR__getDriveLetter(void);
94long CALLBACK CDR__configure(void);
95long CALLBACK CDR__test(void);
96void CALLBACK CDR__about(void);
97long CALLBACK CDR__setfilename(char *filename);
98long CALLBACK CDR__getStatus(struct CdrStat *stat);
99
100static void DecodeRawSubData(void);
101
102struct trackinfo {
103 enum {DATA=1, CDDA} type;
104 char start[3]; // MSF-format
105 char length[3]; // MSF-format
106 FILE *handle; // for multi-track images CDDA
107 unsigned int start_offset; // byte offset from start of above file
108};
109
110#define MAXTRACKS 100 /* How many tracks can a CD hold? */
111
112static int numtracks = 0;
113static struct trackinfo ti[MAXTRACKS];
114
115// get a sector from a msf-array
116static unsigned int msf2sec(char *msf) {
117 return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
118}
119
120static void sec2msf(unsigned int s, char *msf) {
121 msf[0] = s / 75 / 60;
122 s = s - msf[0] * 75 * 60;
123 msf[1] = s / 75;
124 s = s - msf[1] * 75;
125 msf[2] = s;
126}
127
128// divide a string of xx:yy:zz into m, s, f
129static void tok2msf(char *time, char *msf) {
130 char *token;
131
132 token = strtok(time, ":");
133 if (token) {
134 msf[0] = atoi(token);
135 }
136 else {
137 msf[0] = 0;
138 }
139
140 token = strtok(NULL, ":");
141 if (token) {
142 msf[1] = atoi(token);
143 }
144 else {
145 msf[1] = 0;
146 }
147
148 token = strtok(NULL, ":");
149 if (token) {
150 msf[2] = atoi(token);
151 }
152 else {
153 msf[2] = 0;
154 }
155}
156
157#ifndef _WIN32
158static long GetTickCount(void) {
159 static time_t initial_time = 0;
160 struct timeval now;
161
162 gettimeofday(&now, NULL);
163
164 if (initial_time == 0) {
165 initial_time = now.tv_sec;
166 }
167
168 return (now.tv_sec - initial_time) * 1000L + now.tv_usec / 1000L;
169}
170#endif
171
172// this thread plays audio data
173#ifdef _WIN32
174static void playthread(void *param)
175#else
176static void *playthread(void *param)
177#endif
178{
179 long osleep, d, t, i, s;
180 unsigned char tmp;
181 int ret = 0, sector_offs;
182
183 t = GetTickCount();
184
185 while (playing) {
186 s = 0;
187 for (i = 0; i < sizeof(sndbuffer) / CD_FRAMESIZE_RAW; i++) {
188 sector_offs = cdda_cur_sector - cdda_first_sector;
189 if (sector_offs < 0) {
190 d = CD_FRAMESIZE_RAW;
191 memset(sndbuffer + s, 0, d);
192 }
193 else {
194 d = cdimg_read_func(cddaHandle, cdda_file_offset,
195 sndbuffer + s, sector_offs);
196 if (d < CD_FRAMESIZE_RAW)
197 break;
198 }
199
200 s += d;
201 cdda_cur_sector++;
202 }
203
204 if (s == 0) {
205 playing = FALSE;
206 initial_offset = 0;
207 break;
208 }
209
210 if (!cdr.Muted && playing) {
211 if (cddaBigEndian) {
212 for (i = 0; i < s / 2; i++) {
213 tmp = sndbuffer[i * 2];
214 sndbuffer[i * 2] = sndbuffer[i * 2 + 1];
215 sndbuffer[i * 2 + 1] = tmp;
216 }
217 }
218
219 // can't do it yet due to readahead..
220 //cdrAttenuate((short *)sndbuffer, s / 4, 1);
221 do {
222 ret = SPU_playCDDAchannel((short *)sndbuffer, s);
223 if (ret == 0x7761)
224 usleep(6 * 1000);
225 } while (ret == 0x7761 && playing); // rearmed_wait
226 }
227
228 if (ret != 0x676f) { // !rearmed_go
229 // do approx sleep
230 long now;
231
232 // HACK: stop feeding data while emu is paused
233 extern int stop;
234 while (stop && playing)
235 usleep(10000);
236
237 now = GetTickCount();
238 osleep = t - now;
239 if (osleep <= 0) {
240 osleep = 1;
241 t = now;
242 }
243 else if (osleep > CDDA_FRAMETIME) {
244 osleep = CDDA_FRAMETIME;
245 t = now;
246 }
247
248 usleep(osleep * 1000);
249 t += CDDA_FRAMETIME;
250 }
251
252 }
253
254#ifdef _WIN32
255 _endthread();
256#else
257 pthread_exit(0);
258 return NULL;
259#endif
260}
261
262// stop the CDDA playback
263static void stopCDDA() {
264 if (!playing) {
265 return;
266 }
267
268 playing = FALSE;
269#ifdef _WIN32
270 WaitForSingleObject(threadid, INFINITE);
271#else
272 pthread_join(threadid, NULL);
273#endif
274}
275
276// start the CDDA playback
277static void startCDDA(void) {
278 if (playing) {
279 stopCDDA();
280 }
281
282 playing = TRUE;
283
284#ifdef _WIN32
285 threadid = (HANDLE)_beginthread(playthread, 0, NULL);
286#else
287 pthread_create(&threadid, NULL, playthread, NULL);
288#endif
289}
290
291// this function tries to get the .toc file of the given .bin
292// the necessary data is put into the ti (trackinformation)-array
293static int parsetoc(const char *isofile) {
294 char tocname[MAXPATHLEN];
295 FILE *fi;
296 char linebuf[256], tmp[256], name[256];
297 char *token;
298 char time[20], time2[20];
299 unsigned int t, sector_offs, sector_size;
300 unsigned int current_zero_gap = 0;
301
302 numtracks = 0;
303
304 // copy name of the iso and change extension from .bin to .toc
305 strncpy(tocname, isofile, sizeof(tocname));
306 tocname[MAXPATHLEN - 1] = '\0';
307 if (strlen(tocname) >= 4) {
308 strcpy(tocname + strlen(tocname) - 4, ".toc");
309 }
310 else {
311 return -1;
312 }
313
314 if ((fi = fopen(tocname, "r")) == NULL) {
315 // try changing extension to .cue (to satisfy some stupid tutorials)
316 strcpy(tocname + strlen(tocname) - 4, ".cue");
317 if ((fi = fopen(tocname, "r")) == NULL) {
318 // if filename is image.toc.bin, try removing .bin (for Brasero)
319 strcpy(tocname, isofile);
320 t = strlen(tocname);
321 if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
322 tocname[t - 4] = '\0';
323 if ((fi = fopen(tocname, "r")) == NULL) {
324 return -1;
325 }
326 }
327 else {
328 return -1;
329 }
330 }
331 // check if it's really a TOC named as a .cue
332 fgets(linebuf, sizeof(linebuf), fi);
333 token = strtok(linebuf, " ");
334 if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
335 fclose(fi);
336 return -1;
337 }
338 fseek(fi, 0, SEEK_SET);
339 }
340
341 memset(&ti, 0, sizeof(ti));
342 cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
343
344 sector_size = CD_FRAMESIZE_RAW;
345 sector_offs = 2 * 75;
346
347 // parse the .toc file
348 while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
349 // search for tracks
350 strncpy(tmp, linebuf, sizeof(linebuf));
351 token = strtok(tmp, " ");
352
353 if (token == NULL) continue;
354
355 if (!strcmp(token, "TRACK")) {
356 sector_offs += current_zero_gap;
357 current_zero_gap = 0;
358
359 // get type of track
360 token = strtok(NULL, " ");
361 numtracks++;
362
363 if (!strncmp(token, "MODE2_RAW", 9)) {
364 ti[numtracks].type = DATA;
365 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
366
367 // check if this image contains mixed subchannel data
368 token = strtok(NULL, " ");
369 if (token != NULL && !strncmp(token, "RW", 2)) {
370 sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
371 subChanMixed = TRUE;
372 if (!strncmp(token, "RW_RAW", 6))
373 subChanRaw = TRUE;
374 }
375 }
376 else if (!strncmp(token, "AUDIO", 5)) {
377 ti[numtracks].type = CDDA;
378 }
379 }
380 else if (!strcmp(token, "DATAFILE")) {
381 if (ti[numtracks].type == CDDA) {
382 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
383 ti[numtracks].start_offset = t;
384 t = t / sector_size + sector_offs;
385 sec2msf(t, (char *)&ti[numtracks].start);
386 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
387 }
388 else {
389 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
390 tok2msf((char *)&time, (char *)&ti[numtracks].length);
391 }
392 }
393 else if (!strcmp(token, "FILE")) {
394 sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
395 tok2msf((char *)&time, (char *)&ti[numtracks].start);
396 t += msf2sec(ti[numtracks].start) * sector_size;
397 ti[numtracks].start_offset = t;
398 t = t / sector_size + sector_offs;
399 sec2msf(t, (char *)&ti[numtracks].start);
400 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
401 }
402 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
403 // skip unneeded optional fields
404 while (token != NULL) {
405 token = strtok(NULL, " ");
406 if (strchr(token, ':') != NULL)
407 break;
408 }
409 if (token != NULL) {
410 tok2msf(token, tmp);
411 current_zero_gap = msf2sec(tmp);
412 }
413 if (numtracks > 1) {
414 t = ti[numtracks - 1].start_offset;
415 t /= sector_size;
416 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
417 }
418 }
419 else if (!strcmp(token, "START")) {
420 token = strtok(NULL, " ");
421 if (token != NULL && strchr(token, ':')) {
422 tok2msf(token, tmp);
423 t = msf2sec(tmp);
424 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
425 t = msf2sec(ti[numtracks].start) + t;
426 sec2msf(t, (char *)&ti[numtracks].start);
427 }
428 }
429 }
430
431 fclose(fi);
432
433 return 0;
434}
435
436// this function tries to get the .cue file of the given .bin
437// the necessary data is put into the ti (trackinformation)-array
438static int parsecue(const char *isofile) {
439 char cuename[MAXPATHLEN];
440 char filepath[MAXPATHLEN];
441 char *incue_fname;
442 FILE *fi;
443 char *token;
444 char time[20];
445 char *tmp;
446 char linebuf[256], tmpb[256], dummy[256];
447 unsigned int incue_max_len;
448 unsigned int t, file_len, mode, sector_offs;
449 unsigned int sector_size = 2352;
450
451 numtracks = 0;
452
453 // copy name of the iso and change extension from .bin to .cue
454 strncpy(cuename, isofile, sizeof(cuename));
455 cuename[MAXPATHLEN - 1] = '\0';
456 if (strlen(cuename) >= 4) {
457 strcpy(cuename + strlen(cuename) - 4, ".cue");
458 }
459 else {
460 return -1;
461 }
462
463 if ((fi = fopen(cuename, "r")) == NULL) {
464 return -1;
465 }
466
467 // Some stupid tutorials wrongly tell users to use cdrdao to rip a
468 // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
469 // that...
470 if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
471 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
472 // Don't proceed further, as this is actually a .toc file rather
473 // than a .cue file.
474 fclose(fi);
475 return parsetoc(isofile);
476 }
477 fseek(fi, 0, SEEK_SET);
478 }
479
480 // build a path for files referenced in .cue
481 strncpy(filepath, cuename, sizeof(filepath));
482 tmp = strrchr(filepath, '/');
483 if (tmp == NULL)
484 tmp = strrchr(filepath, '\\');
485 if (tmp != NULL)
486 tmp++;
487 else
488 tmp = filepath;
489 *tmp = 0;
490 filepath[sizeof(filepath) - 1] = 0;
491 incue_fname = tmp;
492 incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
493
494 memset(&ti, 0, sizeof(ti));
495
496 file_len = 0;
497 sector_offs = 2 * 75;
498
499 while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
500 strncpy(dummy, linebuf, sizeof(linebuf));
501 token = strtok(dummy, " ");
502
503 if (token == NULL) {
504 continue;
505 }
506
507 if (!strcmp(token, "TRACK")) {
508 numtracks++;
509
510 sector_size = 0;
511 if (strstr(linebuf, "AUDIO") != NULL) {
512 ti[numtracks].type = CDDA;
513 sector_size = 2352;
514 }
515 else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
516 ti[numtracks].type = DATA;
517 else {
518 SysPrintf(".cue: failed to parse TRACK\n");
519 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
520 }
521 if (sector_size == 0)
522 sector_size = 2352;
523 }
524 else if (!strcmp(token, "INDEX")) {
525 if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
526 SysPrintf(".cue: failed to parse INDEX\n");
527 tok2msf(time, (char *)&ti[numtracks].start);
528
529 t = msf2sec(ti[numtracks].start);
530 ti[numtracks].start_offset = t * sector_size;
531 t += sector_offs;
532 sec2msf(t, ti[numtracks].start);
533
534 // default track length to file length
535 t = file_len - ti[numtracks].start_offset / sector_size;
536 sec2msf(t, ti[numtracks].length);
537
538 if (numtracks > 1 && ti[numtracks].handle == NULL) {
539 // this track uses the same file as the last,
540 // start of this track is last track's end
541 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
542 sec2msf(t, ti[numtracks - 1].length);
543 }
544 if (numtracks > 1 && pregapOffset == -1)
545 pregapOffset = ti[numtracks].start_offset / sector_size;
546 }
547 else if (!strcmp(token, "PREGAP")) {
548 if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
549 tok2msf(time, dummy);
550 sector_offs += msf2sec(dummy);
551 }
552 pregapOffset = -1; // mark to fill track start_offset
553 }
554 else if (!strcmp(token, "FILE")) {
555 t = sscanf(linebuf, " FILE \"%256[^\"]\"", tmpb);
556 if (t != 1)
557 sscanf(linebuf, " FILE %256s", tmpb);
558
559 // absolute path?
560 ti[numtracks + 1].handle = fopen(tmpb, "rb");
561 if (ti[numtracks + 1].handle == NULL) {
562 // relative to .cue?
563 tmp = strrchr(tmpb, '\\');
564 if (tmp == NULL)
565 tmp = strrchr(tmpb, '/');
566 if (tmp != NULL)
567 tmp++;
568 else
569 tmp = tmpb;
570 strncpy(incue_fname, tmp, incue_max_len);
571 ti[numtracks + 1].handle = fopen(filepath, "rb");
572 }
573
574 // update global offset if this is not first file in this .cue
575 if (numtracks + 1 > 1) {
576 multifile = 1;
577 sector_offs += file_len;
578 }
579
580 file_len = 0;
581 if (ti[numtracks + 1].handle == NULL) {
582 SysPrintf(_("\ncould not open: %s\n"), filepath);
583 continue;
584 }
585 fseek(ti[numtracks + 1].handle, 0, SEEK_END);
586 file_len = ftell(ti[numtracks + 1].handle) / 2352;
587
588 if (numtracks == 0 && strlen(isofile) >= 4 &&
589 strcmp(isofile + strlen(isofile) - 4, ".cue") == 0)
590 {
591 // user selected .cue as image file, use it's data track instead
592 fclose(cdHandle);
593 cdHandle = fopen(filepath, "rb");
594 }
595 }
596 }
597
598 fclose(fi);
599
600 return 0;
601}
602
603// this function tries to get the .ccd file of the given .img
604// the necessary data is put into the ti (trackinformation)-array
605static int parseccd(const char *isofile) {
606 char ccdname[MAXPATHLEN];
607 FILE *fi;
608 char linebuf[256];
609 unsigned int t;
610
611 numtracks = 0;
612
613 // copy name of the iso and change extension from .img to .ccd
614 strncpy(ccdname, isofile, sizeof(ccdname));
615 ccdname[MAXPATHLEN - 1] = '\0';
616 if (strlen(ccdname) >= 4) {
617 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
618 }
619 else {
620 return -1;
621 }
622
623 if ((fi = fopen(ccdname, "r")) == NULL) {
624 return -1;
625 }
626
627 memset(&ti, 0, sizeof(ti));
628
629 while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
630 if (!strncmp(linebuf, "[TRACK", 6)){
631 numtracks++;
632 }
633 else if (!strncmp(linebuf, "MODE=", 5)) {
634 sscanf(linebuf, "MODE=%d", &t);
635 ti[numtracks].type = ((t == 0) ? CDDA : DATA);
636 }
637 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
638 sscanf(linebuf, "INDEX 1=%d", &t);
639 sec2msf(t + 2 * 75, ti[numtracks].start);
640 ti[numtracks].start_offset = t * 2352;
641
642 // If we've already seen another track, this is its end
643 if (numtracks > 1) {
644 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
645 sec2msf(t, ti[numtracks - 1].length);
646 }
647 }
648 }
649
650 fclose(fi);
651
652 // Fill out the last track's end based on size
653 if (numtracks >= 1) {
654 fseek(cdHandle, 0, SEEK_END);
655 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
656 sec2msf(t, ti[numtracks].length);
657 }
658
659 return 0;
660}
661
662// this function tries to get the .mds file of the given .mdf
663// the necessary data is put into the ti (trackinformation)-array
664static int parsemds(const char *isofile) {
665 char mdsname[MAXPATHLEN];
666 FILE *fi;
667 unsigned int offset, extra_offset, l, i;
668 unsigned short s;
669
670 numtracks = 0;
671
672 // copy name of the iso and change extension from .mdf to .mds
673 strncpy(mdsname, isofile, sizeof(mdsname));
674 mdsname[MAXPATHLEN - 1] = '\0';
675 if (strlen(mdsname) >= 4) {
676 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
677 }
678 else {
679 return -1;
680 }
681
682 if ((fi = fopen(mdsname, "rb")) == NULL) {
683 return -1;
684 }
685
686 memset(&ti, 0, sizeof(ti));
687
688 // check if it's a valid mds file
689 fread(&i, 1, sizeof(unsigned int), fi);
690 i = SWAP32(i);
691 if (i != 0x4944454D) {
692 // not an valid mds file
693 fclose(fi);
694 return -1;
695 }
696
697 // get offset to session block
698 fseek(fi, 0x50, SEEK_SET);
699 fread(&offset, 1, sizeof(unsigned int), fi);
700 offset = SWAP32(offset);
701
702 // get total number of tracks
703 offset += 14;
704 fseek(fi, offset, SEEK_SET);
705 fread(&s, 1, sizeof(unsigned short), fi);
706 s = SWAP16(s);
707 numtracks = s;
708
709 // get offset to track blocks
710 fseek(fi, 4, SEEK_CUR);
711 fread(&offset, 1, sizeof(unsigned int), fi);
712 offset = SWAP32(offset);
713
714 // skip lead-in data
715 while (1) {
716 fseek(fi, offset + 4, SEEK_SET);
717 if (fgetc(fi) < 0xA0) {
718 break;
719 }
720 offset += 0x50;
721 }
722
723 // check if the image contains mixed subchannel data
724 fseek(fi, offset + 1, SEEK_SET);
725 subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
726
727 // read track data
728 for (i = 1; i <= numtracks; i++) {
729 fseek(fi, offset, SEEK_SET);
730
731 // get the track type
732 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
733 fseek(fi, 8, SEEK_CUR);
734
735 // get the track starting point
736 ti[i].start[0] = fgetc(fi);
737 ti[i].start[1] = fgetc(fi);
738 ti[i].start[2] = fgetc(fi);
739
740 fread(&extra_offset, 1, sizeof(unsigned int), fi);
741 extra_offset = SWAP32(extra_offset);
742
743 // get track start offset (in .mdf)
744 fseek(fi, offset + 0x28, SEEK_SET);
745 fread(&l, 1, sizeof(unsigned int), fi);
746 l = SWAP32(l);
747 ti[i].start_offset = l;
748
749 // get pregap
750 fseek(fi, extra_offset, SEEK_SET);
751 fread(&l, 1, sizeof(unsigned int), fi);
752 l = SWAP32(l);
753 if (l != 0 && i > 1)
754 pregapOffset = msf2sec(ti[i].start);
755
756 // get the track length
757 fread(&l, 1, sizeof(unsigned int), fi);
758 l = SWAP32(l);
759 sec2msf(l, ti[i].length);
760
761 offset += 0x50;
762 }
763
764 fclose(fi);
765 return 0;
766}
767
768static int handlepbp(const char *isofile) {
769 struct {
770 unsigned int sig;
771 unsigned int dontcare[8];
772 unsigned int psar_offs;
773 } pbp_hdr;
774 struct {
775 unsigned char type;
776 unsigned char pad0;
777 unsigned char track;
778 char index0[3];
779 char pad1;
780 char index1[3];
781 } toc_entry;
782 struct {
783 unsigned int offset;
784 unsigned int size;
785 unsigned int dontcare[6];
786 } index_entry;
787 char psar_sig[11];
788 unsigned int t, cd_length, cdimg_base;
789 unsigned int offsettab[8], psisoimg_offs;
790 const char *ext = NULL;
791 int i, ret;
792
793 if (strlen(isofile) >= 4)
794 ext = isofile + strlen(isofile) - 4;
795 if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
796 return -1;
797
798 fseek(cdHandle, 0, SEEK_SET);
799
800 numtracks = 0;
801
802 ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
803 if (ret != sizeof(pbp_hdr)) {
804 SysPrintf("failed to read pbp\n");
805 goto fail_io;
806 }
807
808 ret = fseek(cdHandle, pbp_hdr.psar_offs, SEEK_SET);
809 if (ret != 0) {
810 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs);
811 goto fail_io;
812 }
813
814 psisoimg_offs = pbp_hdr.psar_offs;
815 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
816 psar_sig[10] = 0;
817 if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
818 // multidisk image?
819 ret = fseek(cdHandle, pbp_hdr.psar_offs + 0x200, SEEK_SET);
820 if (ret != 0) {
821 SysPrintf("failed to seek to %x\n", pbp_hdr.psar_offs + 0x200);
822 goto fail_io;
823 }
824
825 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
826 SysPrintf("failed to read offsettab\n");
827 goto fail_io;
828 }
829
830 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
831 if (offsettab[i] == 0)
832 break;
833 }
834 cdrIsoMultidiskCount = i;
835 if (cdrIsoMultidiskCount == 0) {
836 SysPrintf("multidisk eboot has 0 images?\n");
837 goto fail_io;
838 }
839
840 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
841 cdrIsoMultidiskSelect = 0;
842
843 psisoimg_offs += offsettab[cdrIsoMultidiskSelect];
844
845 ret = fseek(cdHandle, psisoimg_offs, SEEK_SET);
846 if (ret != 0) {
847 SysPrintf("failed to seek to %x\n", psisoimg_offs);
848 goto fail_io;
849 }
850
851 fread(psar_sig, 1, sizeof(psar_sig), cdHandle);
852 psar_sig[10] = 0;
853 }
854
855 if (strcmp(psar_sig, "PSISOIMG00") != 0) {
856 SysPrintf("bad psar_sig: %s\n", psar_sig);
857 goto fail_io;
858 }
859
860 // seek to TOC
861 ret = fseek(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
862 if (ret != 0) {
863 SysPrintf("failed to seek to %x\n", psisoimg_offs + 0x800);
864 goto fail_io;
865 }
866
867 // first 3 entries are special
868 fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
869 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
870 numtracks = btoi(toc_entry.index1[0]);
871
872 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
873 cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
874 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
875
876 for (i = 1; i <= numtracks; i++) {
877 fread(&toc_entry, 1, sizeof(toc_entry), cdHandle);
878
879 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
880
881 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
882 btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
883 ti[i].start_offset *= 2352;
884 ti[i].start[0] = btoi(toc_entry.index1[0]);
885 ti[i].start[1] = btoi(toc_entry.index1[1]);
886 ti[i].start[2] = btoi(toc_entry.index1[2]);
887
888 if (i > 1) {
889 t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
890 sec2msf(t, ti[i - 1].length);
891 }
892 }
893 t = cd_length - ti[numtracks].start_offset / 2352;
894 sec2msf(t, ti[numtracks].length);
895
896 // seek to ISO index
897 ret = fseek(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
898 if (ret != 0) {
899 SysPrintf("failed to seek to ISO index\n");
900 goto fail_io;
901 }
902
903 compr_img = calloc(1, sizeof(*compr_img));
904 if (compr_img == NULL)
905 goto fail_io;
906
907 compr_img->block_shift = 4;
908 compr_img->current_block = (unsigned int)-1;
909
910 compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
911 compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
912 if (compr_img->index_table == NULL)
913 goto fail_io;
914
915 cdimg_base = psisoimg_offs + 0x100000;
916 for (i = 0; i < compr_img->index_len; i++) {
917 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
918 if (ret != sizeof(index_entry)) {
919 SysPrintf("failed to read index_entry #%d\n", i);
920 goto fail_index;
921 }
922
923 if (index_entry.size == 0)
924 break;
925
926 compr_img->index_table[i] = cdimg_base + index_entry.offset;
927 }
928 compr_img->index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
929
930 return 0;
931
932fail_index:
933 free(compr_img->index_table);
934 compr_img->index_table = NULL;
935fail_io:
936 if (compr_img != NULL) {
937 free(compr_img);
938 compr_img = NULL;
939 }
940 return -1;
941}
942
943static int handlecbin(const char *isofile) {
944 struct
945 {
946 char magic[4];
947 unsigned int header_size;
948 unsigned long long total_bytes;
949 unsigned int block_size;
950 unsigned char ver; // 1
951 unsigned char align;
952 unsigned char rsv_06[2];
953 } ciso_hdr;
954 const char *ext = NULL;
955 unsigned int index = 0, plain;
956 int i, ret;
957
958 if (strlen(isofile) >= 5)
959 ext = isofile + strlen(isofile) - 5;
960 if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
961 return -1;
962
963 fseek(cdHandle, 0, SEEK_SET);
964
965 ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
966 if (ret != sizeof(ciso_hdr)) {
967 SysPrintf("failed to read ciso header\n");
968 return -1;
969 }
970
971 if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
972 SysPrintf("bad ciso header\n");
973 return -1;
974 }
975 if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
976 ret = fseek(cdHandle, ciso_hdr.header_size, SEEK_SET);
977 if (ret != 0) {
978 SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
979 return -1;
980 }
981 }
982
983 compr_img = calloc(1, sizeof(*compr_img));
984 if (compr_img == NULL)
985 goto fail_io;
986
987 compr_img->block_shift = 0;
988 compr_img->current_block = (unsigned int)-1;
989
990 compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
991 compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
992 if (compr_img->index_table == NULL)
993 goto fail_io;
994
995 ret = fread(compr_img->index_table, sizeof(compr_img->index_table[0]), compr_img->index_len, cdHandle);
996 if (ret != compr_img->index_len) {
997 SysPrintf("failed to read index table\n");
998 goto fail_index;
999 }
1000
1001 for (i = 0; i < compr_img->index_len + 1; i++) {
1002 index = compr_img->index_table[i];
1003 plain = index & 0x80000000;
1004 index &= 0x7fffffff;
1005 compr_img->index_table[i] = (index << ciso_hdr.align) | plain;
1006 }
1007 if ((long long)index << ciso_hdr.align >= 0x80000000ll)
1008 SysPrintf("warning: ciso img too large, expect problems\n");
1009
1010 return 0;
1011
1012fail_index:
1013 free(compr_img->index_table);
1014 compr_img->index_table = NULL;
1015fail_io:
1016 if (compr_img != NULL) {
1017 free(compr_img);
1018 compr_img = NULL;
1019 }
1020 return -1;
1021}
1022
1023// this function tries to get the .sub file of the given .img
1024static int opensubfile(const char *isoname) {
1025 char subname[MAXPATHLEN];
1026
1027 // copy name of the iso and change extension from .img to .sub
1028 strncpy(subname, isoname, sizeof(subname));
1029 subname[MAXPATHLEN - 1] = '\0';
1030 if (strlen(subname) >= 4) {
1031 strcpy(subname + strlen(subname) - 4, ".sub");
1032 }
1033 else {
1034 return -1;
1035 }
1036
1037 subHandle = fopen(subname, "rb");
1038 if (subHandle == NULL) {
1039 return -1;
1040 }
1041
1042 return 0;
1043}
1044
1045static int opensbifile(const char *isoname) {
1046 char sbiname[MAXPATHLEN];
1047 int s;
1048
1049 strncpy(sbiname, isoname, sizeof(sbiname));
1050 sbiname[MAXPATHLEN - 1] = '\0';
1051 if (strlen(sbiname) >= 4) {
1052 strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1053 }
1054 else {
1055 return -1;
1056 }
1057
1058 fseek(cdHandle, 0, SEEK_END);
1059 s = ftell(cdHandle) / 2352;
1060
1061 return LoadSBI(sbiname, s);
1062}
1063
1064static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1065{
1066 fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1067 return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1068}
1069
1070static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1071{
1072 int ret;
1073
1074 fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1075 ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1076 fread(subbuffer, 1, SUB_FRAMESIZE, f);
1077
1078 if (subChanRaw) DecodeRawSubData();
1079
1080 return ret;
1081}
1082
1083static int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1084{
1085 static z_stream z;
1086 int ret = 0;
1087
1088 if (z.zalloc == NULL) {
1089 // XXX: one-time leak here..
1090 z.next_in = Z_NULL;
1091 z.avail_in = 0;
1092 z.zalloc = Z_NULL;
1093 z.zfree = Z_NULL;
1094 z.opaque = Z_NULL;
1095 ret = inflateInit2(&z, -15);
1096 }
1097 else
1098 ret = inflateReset(&z);
1099 if (ret != Z_OK)
1100 return ret;
1101
1102 z.next_in = in;
1103 z.avail_in = in_size;
1104 z.next_out = out;
1105 z.avail_out = *out_size;
1106
1107 ret = inflate(&z, Z_NO_FLUSH);
1108 //inflateEnd(&z);
1109
1110 *out_size -= z.avail_out;
1111 return ret == 1 ? 0 : ret;
1112}
1113
1114static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1115{
1116 unsigned long cdbuffer_size, cdbuffer_size_expect;
1117 unsigned int start_byte, size;
1118 int is_compressed;
1119 int ret, block;
1120
1121 if (base)
1122 sector += base / 2352;
1123
1124 block = sector >> compr_img->block_shift;
1125 compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1126
1127 if (block == compr_img->current_block) {
1128 //printf("hit sect %d\n", sector);
1129 goto finish;
1130 }
1131
1132 if (sector >= compr_img->index_len * 16) {
1133 SysPrintf("sector %d is past img end\n", sector);
1134 return -1;
1135 }
1136
1137 start_byte = compr_img->index_table[block] & 0x7fffffff;
1138 if (fseek(cdHandle, start_byte, SEEK_SET) != 0) {
1139 SysPrintf("seek error for block %d at %x: ",
1140 block, start_byte);
1141 perror(NULL);
1142 return -1;
1143 }
1144
1145 is_compressed = !(compr_img->index_table[block] & 0x80000000);
1146 size = (compr_img->index_table[block + 1] & 0x7fffffff) - start_byte;
1147 if (size > sizeof(compr_img->buff_compressed)) {
1148 SysPrintf("block %d is too large: %u\n", block, size);
1149 return -1;
1150 }
1151
1152 if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1153 1, size, cdHandle) != size) {
1154 SysPrintf("read error for block %d at %x: ", block, start_byte);
1155 perror(NULL);
1156 return -1;
1157 }
1158
1159 if (is_compressed) {
1160 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1161 cdbuffer_size = cdbuffer_size_expect;
1162 ret = uncompress2(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1163 if (ret != 0) {
1164 SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1165 ret, block, sector);
1166 return -1;
1167 }
1168 if (cdbuffer_size != cdbuffer_size_expect)
1169 SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1170 cdbuffer_size_expect, sector);
1171 }
1172
1173 // done at last!
1174 compr_img->current_block = block;
1175
1176finish:
1177 if (dest != cdbuffer) // copy avoid HACK
1178 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1179 CD_FRAMESIZE_RAW);
1180 return CD_FRAMESIZE_RAW;
1181}
1182
1183static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1184{
1185 int ret;
1186
1187 fseek(f, base + sector * 2048, SEEK_SET);
1188 ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1189
1190 // not really necessary, fake mode 2 header
1191 memset(cdbuffer, 0, 12 * 2);
1192 sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1193 cdbuffer[12 + 3] = 1;
1194
1195 return ret;
1196}
1197
1198static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1199 return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1200}
1201
1202static unsigned char * CALLBACK ISOgetBuffer(void) {
1203 return cdbuffer + 12;
1204}
1205
1206static void PrintTracks(void) {
1207 int i;
1208
1209 for (i = 1; i <= numtracks; i++) {
1210 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1211 i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1212 ti[i].start[0], ti[i].start[1], ti[i].start[2],
1213 ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1214 }
1215}
1216
1217// This function is invoked by the front-end when opening an ISO
1218// file for playback
1219static long CALLBACK ISOopen(void) {
1220 boolean isMode1ISO = FALSE;
1221 char alt_bin_filename[MAXPATHLEN];
1222 const char *bin_filename;
1223
1224 if (cdHandle != NULL) {
1225 return 0; // it's already open
1226 }
1227
1228 cdHandle = fopen(GetIsoFile(), "rb");
1229 if (cdHandle == NULL) {
1230 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1231 GetIsoFile(), strerror(errno));
1232 return -1;
1233 }
1234
1235 SysPrintf(_("Loaded CD Image: %s"), GetIsoFile());
1236
1237 cddaBigEndian = FALSE;
1238 subChanMixed = FALSE;
1239 subChanRaw = FALSE;
1240 pregapOffset = 0;
1241 cdrIsoMultidiskCount = 1;
1242 multifile = 0;
1243
1244 CDR_getBuffer = ISOgetBuffer;
1245 cdimg_read_func = cdread_normal;
1246
1247 if (parsetoc(GetIsoFile()) == 0) {
1248 SysPrintf("[+toc]");
1249 }
1250 else if (parseccd(GetIsoFile()) == 0) {
1251 SysPrintf("[+ccd]");
1252 }
1253 else if (parsemds(GetIsoFile()) == 0) {
1254 SysPrintf("[+mds]");
1255 }
1256 else if (parsecue(GetIsoFile()) == 0) {
1257 SysPrintf("[+cue]");
1258 }
1259 if (handlepbp(GetIsoFile()) == 0) {
1260 SysPrintf("[pbp]");
1261 CDR_getBuffer = ISOgetBuffer_compr;
1262 cdimg_read_func = cdread_compressed;
1263 }
1264 else if (handlecbin(GetIsoFile()) == 0) {
1265 SysPrintf("[cbin]");
1266 CDR_getBuffer = ISOgetBuffer_compr;
1267 cdimg_read_func = cdread_compressed;
1268 }
1269
1270 if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1271 SysPrintf("[+sub]");
1272 }
1273 if (opensbifile(GetIsoFile()) == 0) {
1274 SysPrintf("[+sbi]");
1275 }
1276
1277 fseek(cdHandle, 0, SEEK_END);
1278
1279 // maybe user selected metadata file instead of main .bin ..
1280 bin_filename = GetIsoFile();
1281 if (ftell(cdHandle) < 2352 * 0x10) {
1282 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1283 FILE *tmpf = NULL;
1284 size_t i;
1285 char *p;
1286
1287 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1288 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1289 if (strlen(alt_bin_filename) >= 4) {
1290 p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1291 for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1292 strcpy(p, exts[i]);
1293 tmpf = fopen(alt_bin_filename, "rb");
1294 if (tmpf != NULL)
1295 break;
1296 }
1297 }
1298 if (tmpf != NULL) {
1299 bin_filename = alt_bin_filename;
1300 fclose(cdHandle);
1301 cdHandle = tmpf;
1302 fseek(cdHandle, 0, SEEK_END);
1303 }
1304 }
1305
1306 // guess whether it is mode1/2048
1307 if (ftell(cdHandle) % 2048 == 0) {
1308 unsigned int modeTest = 0;
1309 fseek(cdHandle, 0, SEEK_SET);
1310 fread(&modeTest, 4, 1, cdHandle);
1311 if (SWAP32(modeTest) != 0xffffff00) {
1312 SysPrintf("[2048]");
1313 isMode1ISO = TRUE;
1314 }
1315 }
1316 fseek(cdHandle, 0, SEEK_SET);
1317
1318 SysPrintf(".\n");
1319
1320 PrintTracks();
1321
1322 if (subChanMixed)
1323 cdimg_read_func = cdread_sub_mixed;
1324 else if (isMode1ISO)
1325 cdimg_read_func = cdread_2048;
1326
1327 // make sure we have another handle open for cdda
1328 if (numtracks > 1 && ti[1].handle == NULL) {
1329 ti[1].handle = fopen(bin_filename, "rb");
1330 }
1331 cdda_cur_sector = 0;
1332 cdda_file_offset = 0;
1333
1334 return 0;
1335}
1336
1337static long CALLBACK ISOclose(void) {
1338 int i;
1339
1340 if (cdHandle != NULL) {
1341 fclose(cdHandle);
1342 cdHandle = NULL;
1343 }
1344 if (subHandle != NULL) {
1345 fclose(subHandle);
1346 subHandle = NULL;
1347 }
1348 stopCDDA();
1349 cddaHandle = NULL;
1350
1351 if (compr_img != NULL) {
1352 free(compr_img->index_table);
1353 free(compr_img);
1354 compr_img = NULL;
1355 }
1356
1357 for (i = 1; i <= numtracks; i++) {
1358 if (ti[i].handle != NULL) {
1359 fclose(ti[i].handle);
1360 ti[i].handle = NULL;
1361 }
1362 }
1363 numtracks = 0;
1364 ti[1].type = 0;
1365 UnloadSBI();
1366
1367 memset(cdbuffer, 0, sizeof(cdbuffer));
1368 CDR_getBuffer = ISOgetBuffer;
1369
1370 return 0;
1371}
1372
1373static long CALLBACK ISOinit(void) {
1374 assert(cdHandle == NULL);
1375 assert(subHandle == NULL);
1376
1377 return 0; // do nothing
1378}
1379
1380static long CALLBACK ISOshutdown(void) {
1381 ISOclose();
1382 return 0;
1383}
1384
1385// return Starting and Ending Track
1386// buffer:
1387// byte 0 - start track
1388// byte 1 - end track
1389static long CALLBACK ISOgetTN(unsigned char *buffer) {
1390 buffer[0] = 1;
1391
1392 if (numtracks > 0) {
1393 buffer[1] = numtracks;
1394 }
1395 else {
1396 buffer[1] = 1;
1397 }
1398
1399 return 0;
1400}
1401
1402// return Track Time
1403// buffer:
1404// byte 0 - frame
1405// byte 1 - second
1406// byte 2 - minute
1407static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1408 if (track == 0) {
1409 unsigned int sect;
1410 unsigned char time[3];
1411 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1412 sec2msf(sect, (char *)time);
1413 buffer[2] = time[0];
1414 buffer[1] = time[1];
1415 buffer[0] = time[2];
1416 }
1417 else if (numtracks > 0 && track <= numtracks) {
1418 buffer[2] = ti[track].start[0];
1419 buffer[1] = ti[track].start[1];
1420 buffer[0] = ti[track].start[2];
1421 }
1422 else {
1423 buffer[2] = 0;
1424 buffer[1] = 2;
1425 buffer[0] = 0;
1426 }
1427
1428 return 0;
1429}
1430
1431// decode 'raw' subchannel data ripped by cdrdao
1432static void DecodeRawSubData(void) {
1433 unsigned char subQData[12];
1434 int i;
1435
1436 memset(subQData, 0, sizeof(subQData));
1437
1438 for (i = 0; i < 8 * 12; i++) {
1439 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1440 subQData[i >> 3] |= (1 << (7 - (i & 7)));
1441 }
1442 }
1443
1444 memcpy(&subbuffer[12], subQData, 12);
1445}
1446
1447// read track
1448// time: byte 0 - minute; byte 1 - second; byte 2 - frame
1449// uses bcd format
1450static long CALLBACK ISOreadTrack(unsigned char *time) {
1451 int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1452 long ret;
1453
1454 if (cdHandle == NULL) {
1455 return -1;
1456 }
1457
1458 if (pregapOffset) {
1459 subChanMissing = FALSE;
1460 if (sector >= pregapOffset) {
1461 sector -= 2 * 75;
1462 if (sector < pregapOffset)
1463 subChanMissing = TRUE;
1464 }
1465 }
1466
1467 ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1468 if (ret < 0)
1469 return -1;
1470
1471 if (subHandle != NULL) {
1472 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1473 fread(subbuffer, 1, SUB_FRAMESIZE, subHandle);
1474
1475 if (subChanRaw) DecodeRawSubData();
1476 }
1477
1478 return 0;
1479}
1480
1481// plays cdda audio
1482// sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1483// does NOT uses bcd format
1484static long CALLBACK ISOplay(unsigned char *time) {
1485 unsigned int i;
1486
1487 if (numtracks <= 1)
1488 return 0;
1489
1490 // find the track
1491 cdda_cur_sector = msf2sec((char *)time);
1492 for (i = numtracks; i > 1; i--) {
1493 cdda_first_sector = msf2sec(ti[i].start);
1494 if (cdda_first_sector <= cdda_cur_sector + 2 * 75)
1495 break;
1496 }
1497 cdda_file_offset = ti[i].start_offset;
1498
1499 // find the file that contains this track
1500 for (; i > 1; i--)
1501 if (ti[i].handle != NULL)
1502 break;
1503
1504 cddaHandle = ti[i].handle;
1505
1506 if (SPU_playCDDAchannel != NULL)
1507 startCDDA();
1508
1509 return 0;
1510}
1511
1512// stops cdda audio
1513static long CALLBACK ISOstop(void) {
1514 stopCDDA();
1515 return 0;
1516}
1517
1518// gets subchannel data
1519static unsigned char* CALLBACK ISOgetBufferSub(void) {
1520 if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1521 return subbuffer;
1522 }
1523
1524 return NULL;
1525}
1526
1527static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1528 u32 sect;
1529
1530 CDR__getStatus(stat);
1531
1532 if (playing) {
1533 stat->Type = 0x02;
1534 stat->Status |= 0x80;
1535 }
1536 else {
1537 // BIOS - boot ID (CD type)
1538 stat->Type = ti[1].type;
1539 }
1540
1541 // relative -> absolute time
1542 sect = cddaCurPos;
1543 sec2msf(sect, (char *)stat->Time);
1544
1545 return 0;
1546}
1547
1548// read CDDA sector into buffer
1549long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1550 unsigned char msf[3] = {m, s, f};
1551 unsigned int file, track, track_start = 0;
1552 int ret;
1553
1554 cddaCurPos = msf2sec((char *)msf);
1555
1556 // find current track index
1557 for (track = numtracks; ; track--) {
1558 track_start = msf2sec(ti[track].start);
1559 if (track_start <= cddaCurPos)
1560 break;
1561 if (track == 1)
1562 break;
1563 }
1564
1565 // data tracks play silent
1566 if (ti[track].type != CDDA) {
1567 memset(buffer, 0, CD_FRAMESIZE_RAW);
1568 return 0;
1569 }
1570
1571 file = 1;
1572 if (multifile) {
1573 // find the file that contains this track
1574 for (file = track; file > 1; file--)
1575 if (ti[file].handle != NULL)
1576 break;
1577 }
1578
1579 ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1580 buffer, cddaCurPos - track_start);
1581 if (ret != CD_FRAMESIZE_RAW) {
1582 memset(buffer, 0, CD_FRAMESIZE_RAW);
1583 return -1;
1584 }
1585
1586 if (cddaBigEndian) {
1587 int i;
1588 unsigned char tmp;
1589
1590 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1591 tmp = buffer[i * 2];
1592 buffer[i * 2] = buffer[i * 2 + 1];
1593 buffer[i * 2 + 1] = tmp;
1594 }
1595 }
1596
1597 return 0;
1598}
1599
1600void cdrIsoInit(void) {
1601 CDR_init = ISOinit;
1602 CDR_shutdown = ISOshutdown;
1603 CDR_open = ISOopen;
1604 CDR_close = ISOclose;
1605 CDR_getTN = ISOgetTN;
1606 CDR_getTD = ISOgetTD;
1607 CDR_readTrack = ISOreadTrack;
1608 CDR_getBuffer = ISOgetBuffer;
1609 CDR_play = ISOplay;
1610 CDR_stop = ISOstop;
1611 CDR_getBufferSub = ISOgetBufferSub;
1612 CDR_getStatus = ISOgetStatus;
1613 CDR_readCDDA = ISOreadCDDA;
1614
1615 CDR_getDriveLetter = CDR__getDriveLetter;
1616 CDR_configure = CDR__configure;
1617 CDR_test = CDR__test;
1618 CDR_about = CDR__about;
1619 CDR_setfilename = CDR__setfilename;
1620
1621 numtracks = 0;
1622}
1623
1624int cdrIsoActive(void) {
1625 return (cdHandle != NULL);
1626}
ARM optimized PCSX fork