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