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