d42132274b720b827fb70b4e8de5dc6649329334
[pcsx_rearmed.git] / libpcsxcore / cdriso.c
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 #include <errno.h>
29 #include <zlib.h>
30 #ifdef HAVE_CHD
31 #include <chd.h>
32 #endif
33
34 #ifdef _WIN32
35 #define WIN32_LEAN_AND_MEAN
36 #include <process.h>
37 #include <windows.h>
38 #define strcasecmp _stricmp
39 #else
40 #include <pthread.h>
41 #include <sys/time.h>
42 #include <unistd.h>
43 #endif
44
45 #ifdef USE_LIBRETRO_VFS
46 #include <streams/file_stream_transforms.h>
47 #undef fseeko
48 #undef ftello
49 #define ftello rftell
50 #define fseeko rfseek
51 #endif
52
53 #define OFF_T_MSB ((off_t)1 << (sizeof(off_t) * 8 - 1))
54
55 unsigned int cdrIsoMultidiskCount;
56 unsigned int cdrIsoMultidiskSelect;
57
58 static FILE *cdHandle = NULL;
59 static FILE *cddaHandle = NULL;
60 static FILE *subHandle = NULL;
61
62 static boolean subChanMixed = FALSE;
63 static boolean subChanRaw = FALSE;
64 static boolean subChanMissing = FALSE;
65
66 static boolean multifile = FALSE;
67
68 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
69 static unsigned char subbuffer[SUB_FRAMESIZE];
70
71 static boolean playing = FALSE;
72 static boolean cddaBigEndian = FALSE;
73 // cdda sectors in toc, byte offset in file
74 static unsigned int cdda_cur_sector;
75 static unsigned int cdda_file_offset;
76 /* Frame offset into CD image where pregap data would be found if it was there.
77  * If a game seeks there we must *not* return subchannel data since it's
78  * not in the CD image, so that cdrom code can fake subchannel data instead.
79  * XXX: there could be multiple pregaps but PSX dumps only have one? */
80 static unsigned int pregapOffset;
81
82 #define cddaCurPos cdda_cur_sector
83
84 // compressed image stuff
85 static struct {
86         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
87         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
88         off_t *index_table;
89         unsigned int index_len;
90         unsigned int block_shift;
91         unsigned int current_block;
92         unsigned int sector_in_blk;
93 } *compr_img;
94
95 #ifdef HAVE_CHD
96 static struct {
97         unsigned char (*buffer)[CD_FRAMESIZE_RAW + SUB_FRAMESIZE];
98         chd_file* chd;
99         const chd_header* header;
100         unsigned int sectors_per_hunk;
101         unsigned int current_hunk;
102         unsigned int sector_in_hunk;
103 } *chd_img;
104 #endif
105
106 int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
107
108 char* CALLBACK CDR__getDriveLetter(void);
109 long CALLBACK CDR__configure(void);
110 long CALLBACK CDR__test(void);
111 void CALLBACK CDR__about(void);
112 long CALLBACK CDR__setfilename(char *filename);
113 long CALLBACK CDR__getStatus(struct CdrStat *stat);
114
115 static void DecodeRawSubData(void);
116
117 struct trackinfo {
118         enum {DATA=1, CDDA} type;
119         char start[3];          // MSF-format
120         char length[3];         // MSF-format
121         FILE *handle;           // for multi-track images CDDA
122         unsigned int start_offset; // byte offset from start of above file
123 };
124
125 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
126
127 static int numtracks = 0;
128 static struct trackinfo ti[MAXTRACKS];
129
130 // get a sector from a msf-array
131 static unsigned int msf2sec(char *msf) {
132         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
133 }
134
135 static void sec2msf(unsigned int s, char *msf) {
136         msf[0] = s / 75 / 60;
137         s = s - msf[0] * 75 * 60;
138         msf[1] = s / 75;
139         s = s - msf[1] * 75;
140         msf[2] = s;
141 }
142
143 // divide a string of xx:yy:zz into m, s, f
144 static void tok2msf(char *time, char *msf) {
145         char *token;
146
147         token = strtok(time, ":");
148         if (token) {
149                 msf[0] = atoi(token);
150         }
151         else {
152                 msf[0] = 0;
153         }
154
155         token = strtok(NULL, ":");
156         if (token) {
157                 msf[1] = atoi(token);
158         }
159         else {
160                 msf[1] = 0;
161         }
162
163         token = strtok(NULL, ":");
164         if (token) {
165                 msf[2] = atoi(token);
166         }
167         else {
168                 msf[2] = 0;
169         }
170 }
171
172 // this function tries to get the .toc file of the given .bin
173 // the necessary data is put into the ti (trackinformation)-array
174 static int parsetoc(const char *isofile) {
175         char                    tocname[MAXPATHLEN];
176         FILE                    *fi;
177         char                    linebuf[256], tmp[256], name[256];
178         char                    *token;
179         char                    time[20], time2[20];
180         unsigned int    t, sector_offs, sector_size;
181         unsigned int    current_zero_gap = 0;
182
183         numtracks = 0;
184
185         // copy name of the iso and change extension from .bin to .toc
186         strncpy(tocname, isofile, sizeof(tocname));
187         tocname[MAXPATHLEN - 1] = '\0';
188         if (strlen(tocname) >= 4) {
189                 strcpy(tocname + strlen(tocname) - 4, ".toc");
190         }
191         else {
192                 return -1;
193         }
194
195         if ((fi = fopen(tocname, "r")) == NULL) {
196                 // try changing extension to .cue (to satisfy some stupid tutorials)
197                 strcpy(tocname + strlen(tocname) - 4, ".cue");
198                 if ((fi = fopen(tocname, "r")) == NULL) {
199                         // if filename is image.toc.bin, try removing .bin (for Brasero)
200                         strcpy(tocname, isofile);
201                         t = strlen(tocname);
202                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
203                                 tocname[t - 4] = '\0';
204                                 if ((fi = fopen(tocname, "r")) == NULL) {
205                                         return -1;
206                                 }
207                         }
208                         else {
209                                 return -1;
210                         }
211                 }
212                 // check if it's really a TOC named as a .cue
213                 if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
214                         token = strtok(linebuf, " ");
215                         if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
216                                 fclose(fi);
217                                 return -1;
218                         }
219                 }
220                 fseek(fi, 0, SEEK_SET);
221         }
222
223         memset(&ti, 0, sizeof(ti));
224         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
225
226         sector_size = CD_FRAMESIZE_RAW;
227         sector_offs = 2 * 75;
228
229         // parse the .toc file
230         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
231                 // search for tracks
232                 strncpy(tmp, linebuf, sizeof(linebuf));
233                 token = strtok(tmp, " ");
234
235                 if (token == NULL) continue;
236
237                 if (!strcmp(token, "TRACK")) {
238                         sector_offs += current_zero_gap;
239                         current_zero_gap = 0;
240
241                         // get type of track
242                         token = strtok(NULL, " ");
243                         numtracks++;
244
245                         if (!strncmp(token, "MODE2_RAW", 9)) {
246                                 ti[numtracks].type = DATA;
247                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
248
249                                 // check if this image contains mixed subchannel data
250                                 token = strtok(NULL, " ");
251                                 if (token != NULL && !strncmp(token, "RW", 2)) {
252                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
253                                         subChanMixed = TRUE;
254                                         if (!strncmp(token, "RW_RAW", 6))
255                                                 subChanRaw = TRUE;
256                                 }
257                         }
258                         else if (!strncmp(token, "AUDIO", 5)) {
259                                 ti[numtracks].type = CDDA;
260                         }
261                 }
262                 else if (!strcmp(token, "DATAFILE")) {
263                         if (ti[numtracks].type == CDDA) {
264                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
265                                 ti[numtracks].start_offset = t;
266                                 t = t / sector_size + sector_offs;
267                                 sec2msf(t, (char *)&ti[numtracks].start);
268                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
269                         }
270                         else {
271                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
272                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
273                         }
274                 }
275                 else if (!strcmp(token, "FILE")) {
276                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
277                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
278                         t += msf2sec(ti[numtracks].start) * sector_size;
279                         ti[numtracks].start_offset = t;
280                         t = t / sector_size + sector_offs;
281                         sec2msf(t, (char *)&ti[numtracks].start);
282                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
283                 }
284                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
285                         // skip unneeded optional fields
286                         while (token != NULL) {
287                                 token = strtok(NULL, " ");
288                                 if (strchr(token, ':') != NULL)
289                                         break;
290                         }
291                         if (token != NULL) {
292                                 tok2msf(token, tmp);
293                                 current_zero_gap = msf2sec(tmp);
294                         }
295                         if (numtracks > 1) {
296                                 t = ti[numtracks - 1].start_offset;
297                                 t /= sector_size;
298                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
299                         }
300                 }
301                 else if (!strcmp(token, "START")) {
302                         token = strtok(NULL, " ");
303                         if (token != NULL && strchr(token, ':')) {
304                                 tok2msf(token, tmp);
305                                 t = msf2sec(tmp);
306                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
307                                 t = msf2sec(ti[numtracks].start) + t;
308                                 sec2msf(t, (char *)&ti[numtracks].start);
309                         }
310                 }
311         }
312
313         fclose(fi);
314
315         return 0;
316 }
317
318 // this function tries to get the .cue file of the given .bin
319 // the necessary data is put into the ti (trackinformation)-array
320 static int parsecue(const char *isofile) {
321         char                    cuename[MAXPATHLEN];
322         char                    filepath[MAXPATHLEN];
323         char                    *incue_fname;
324         FILE                    *fi;
325         char                    *token;
326         char                    time[20];
327         char                    *tmp;
328         char                    linebuf[256], tmpb[256], dummy[256];
329         unsigned int    incue_max_len;
330         unsigned int    t, file_len, mode, sector_offs;
331         unsigned int    sector_size = 2352;
332
333         numtracks = 0;
334
335         // copy name of the iso and change extension from .bin to .cue
336         strncpy(cuename, isofile, sizeof(cuename));
337         cuename[MAXPATHLEN - 1] = '\0';
338         if (strlen(cuename) >= 4) {
339                 // If 'isofile' is a '.cd<X>' file, use it as a .cue file
340                 //  and don't try to search the additional .cue file
341                 if (strncasecmp(cuename + strlen(cuename) - 4, ".cd", 3) != 0 )
342                         strcpy(cuename + strlen(cuename) - 4, ".cue");
343         }
344         else {
345                 return -1;
346         }
347
348         if ((fi = fopen(cuename, "r")) == NULL) {
349                 return -1;
350         }
351
352         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
353         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
354         // that...
355         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
356                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
357                         // Don't proceed further, as this is actually a .toc file rather
358                         // than a .cue file.
359                         fclose(fi);
360                         return parsetoc(isofile);
361                 }
362                 fseek(fi, 0, SEEK_SET);
363         }
364
365         // build a path for files referenced in .cue
366         strncpy(filepath, cuename, sizeof(filepath));
367         tmp = strrchr(filepath, '/');
368         if (tmp == NULL)
369                 tmp = strrchr(filepath, '\\');
370         if (tmp != NULL)
371                 tmp++;
372         else
373                 tmp = filepath;
374         *tmp = 0;
375         filepath[sizeof(filepath) - 1] = 0;
376         incue_fname = tmp;
377         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
378
379         memset(&ti, 0, sizeof(ti));
380
381         file_len = 0;
382         sector_offs = 2 * 75;
383
384         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
385                 strncpy(dummy, linebuf, sizeof(linebuf));
386                 token = strtok(dummy, " ");
387
388                 if (token == NULL) {
389                         continue;
390                 }
391
392                 if (!strcmp(token, "TRACK")) {
393                         numtracks++;
394
395                         sector_size = 0;
396                         if (strstr(linebuf, "AUDIO") != NULL) {
397                                 ti[numtracks].type = CDDA;
398                                 sector_size = 2352;
399                         }
400                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
401                                 ti[numtracks].type = DATA;
402                         else {
403                                 SysPrintf(".cue: failed to parse TRACK\n");
404                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
405                         }
406                         if (sector_size == 0)
407                                 sector_size = 2352;
408                 }
409                 else if (!strcmp(token, "INDEX")) {
410                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
411                                 SysPrintf(".cue: failed to parse INDEX\n");
412                         tok2msf(time, (char *)&ti[numtracks].start);
413
414                         t = msf2sec(ti[numtracks].start);
415                         ti[numtracks].start_offset = t * sector_size;
416                         t += sector_offs;
417                         sec2msf(t, ti[numtracks].start);
418
419                         // default track length to file length
420                         t = file_len - ti[numtracks].start_offset / sector_size;
421                         sec2msf(t, ti[numtracks].length);
422
423                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
424                                 // this track uses the same file as the last,
425                                 // start of this track is last track's end
426                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
427                                 sec2msf(t, ti[numtracks - 1].length);
428                         }
429                         if (numtracks > 1 && pregapOffset == -1)
430                                 pregapOffset = ti[numtracks].start_offset / sector_size;
431                 }
432                 else if (!strcmp(token, "PREGAP")) {
433                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
434                                 tok2msf(time, dummy);
435                                 sector_offs += msf2sec(dummy);
436                         }
437                         pregapOffset = -1; // mark to fill track start_offset
438                 }
439                 else if (!strcmp(token, "FILE")) {
440                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
441                         if (t != 1)
442                                 sscanf(linebuf, " FILE %255s", tmpb);
443
444                         tmp = strrchr(tmpb, '\\');
445                         if (tmp == NULL)
446                                 tmp = strrchr(tmpb, '/');
447                         if (tmp != NULL)
448                                 tmp++;
449                         else
450                                 tmp = tmpb;
451                         strncpy(incue_fname, tmp, incue_max_len);
452                         ti[numtracks + 1].handle = fopen(filepath, "rb");
453
454                         // update global offset if this is not first file in this .cue
455                         if (numtracks + 1 > 1) {
456                                 multifile = 1;
457                                 sector_offs += file_len;
458                         }
459
460                         file_len = 0;
461                         if (ti[numtracks + 1].handle == NULL) {
462                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
463                                 continue;
464                         }
465                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
466                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
467
468                         if (numtracks == 0 && strlen(isofile) >= 4 &&
469                                 (strcmp(isofile + strlen(isofile) - 4, ".cue") == 0 ||
470                                 strncasecmp(isofile + strlen(isofile) - 4, ".cd", 3) == 0)) {
471                                 // user selected .cue/.cdX as image file, use it's data track instead
472                                 fclose(cdHandle);
473                                 cdHandle = fopen(filepath, "rb");
474                         }
475                 }
476         }
477
478         fclose(fi);
479
480         // if there are no tracks detected, then it's not a cue file
481         if (!numtracks)
482                 return -1;
483
484         return 0;
485 }
486
487 // this function tries to get the .ccd file of the given .img
488 // the necessary data is put into the ti (trackinformation)-array
489 static int parseccd(const char *isofile) {
490         char                    ccdname[MAXPATHLEN];
491         FILE                    *fi;
492         char                    linebuf[256];
493         unsigned int    t;
494
495         numtracks = 0;
496
497         // copy name of the iso and change extension from .img to .ccd
498         strncpy(ccdname, isofile, sizeof(ccdname));
499         ccdname[MAXPATHLEN - 1] = '\0';
500         if (strlen(ccdname) >= 4) {
501                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
502         }
503         else {
504                 return -1;
505         }
506
507         if ((fi = fopen(ccdname, "r")) == NULL) {
508                 return -1;
509         }
510
511         memset(&ti, 0, sizeof(ti));
512
513         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
514                 if (!strncmp(linebuf, "[TRACK", 6)){
515                         numtracks++;
516                 }
517                 else if (!strncmp(linebuf, "MODE=", 5)) {
518                         sscanf(linebuf, "MODE=%d", &t);
519                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
520                 }
521                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
522                         sscanf(linebuf, "INDEX 1=%d", &t);
523                         sec2msf(t + 2 * 75, ti[numtracks].start);
524                         ti[numtracks].start_offset = t * 2352;
525
526                         // If we've already seen another track, this is its end
527                         if (numtracks > 1) {
528                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
529                                 sec2msf(t, ti[numtracks - 1].length);
530                         }
531                 }
532         }
533
534         fclose(fi);
535
536         // Fill out the last track's end based on size
537         if (numtracks >= 1) {
538                 fseek(cdHandle, 0, SEEK_END);
539                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
540                 sec2msf(t, ti[numtracks].length);
541         }
542
543         return 0;
544 }
545
546 // this function tries to get the .mds file of the given .mdf
547 // the necessary data is put into the ti (trackinformation)-array
548 static int parsemds(const char *isofile) {
549         char                    mdsname[MAXPATHLEN];
550         FILE                    *fi;
551         unsigned int    offset, extra_offset, l, i;
552         unsigned short  s;
553
554         numtracks = 0;
555
556         // copy name of the iso and change extension from .mdf to .mds
557         strncpy(mdsname, isofile, sizeof(mdsname));
558         mdsname[MAXPATHLEN - 1] = '\0';
559         if (strlen(mdsname) >= 4) {
560                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
561         }
562         else {
563                 return -1;
564         }
565
566         if ((fi = fopen(mdsname, "rb")) == NULL) {
567                 return -1;
568         }
569
570         memset(&ti, 0, sizeof(ti));
571
572         // check if it's a valid mds file
573         if (fread(&i, 1, sizeof(i), fi) != sizeof(i))
574                 goto fail_io;
575         i = SWAP32(i);
576         if (i != 0x4944454D) {
577                 // not an valid mds file
578                 fclose(fi);
579                 return -1;
580         }
581
582         // get offset to session block
583         fseek(fi, 0x50, SEEK_SET);
584         if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
585                 goto fail_io;
586         offset = SWAP32(offset);
587
588         // get total number of tracks
589         offset += 14;
590         fseek(fi, offset, SEEK_SET);
591         if (fread(&s, 1, sizeof(s), fi) != sizeof(s))
592                 goto fail_io;
593         s = SWAP16(s);
594         numtracks = s;
595
596         // get offset to track blocks
597         fseek(fi, 4, SEEK_CUR);
598         if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
599                 goto fail_io;
600         offset = SWAP32(offset);
601
602         // skip lead-in data
603         while (1) {
604                 fseek(fi, offset + 4, SEEK_SET);
605                 if (fgetc(fi) < 0xA0) {
606                         break;
607                 }
608                 offset += 0x50;
609         }
610
611         // check if the image contains mixed subchannel data
612         fseek(fi, offset + 1, SEEK_SET);
613         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
614
615         // read track data
616         for (i = 1; i <= numtracks; i++) {
617                 fseek(fi, offset, SEEK_SET);
618
619                 // get the track type
620                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
621                 fseek(fi, 8, SEEK_CUR);
622
623                 // get the track starting point
624                 ti[i].start[0] = fgetc(fi);
625                 ti[i].start[1] = fgetc(fi);
626                 ti[i].start[2] = fgetc(fi);
627
628                 if (fread(&extra_offset, 1, sizeof(extra_offset), fi) != sizeof(extra_offset))
629                         goto fail_io;
630                 extra_offset = SWAP32(extra_offset);
631
632                 // get track start offset (in .mdf)
633                 fseek(fi, offset + 0x28, SEEK_SET);
634                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
635                         goto fail_io;
636                 l = SWAP32(l);
637                 ti[i].start_offset = l;
638
639                 // get pregap
640                 fseek(fi, extra_offset, SEEK_SET);
641                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
642                         goto fail_io;
643                 l = SWAP32(l);
644                 if (l != 0 && i > 1)
645                         pregapOffset = msf2sec(ti[i].start);
646
647                 // get the track length
648                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
649                         goto fail_io;
650                 l = SWAP32(l);
651                 sec2msf(l, ti[i].length);
652
653                 offset += 0x50;
654         }
655         fclose(fi);
656         return 0;
657 fail_io:
658 #ifndef NDEBUG
659         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
660 #endif
661         fclose(fi);
662         return -1;
663 }
664
665 static int handlepbp(const char *isofile) {
666         struct {
667                 unsigned int sig;
668                 unsigned int dontcare[8];
669                 unsigned int psar_offs;
670         } pbp_hdr;
671         struct {
672                 unsigned char type;
673                 unsigned char pad0;
674                 unsigned char track;
675                 char index0[3];
676                 char pad1;
677                 char index1[3];
678         } toc_entry;
679         struct {
680                 unsigned int offset;
681                 unsigned int size;
682                 unsigned int dontcare[6];
683         } index_entry;
684         char psar_sig[11];
685         off_t psisoimg_offs, cdimg_base;
686         unsigned int t, cd_length;
687         unsigned int offsettab[8];
688         unsigned int psar_offs, index_entry_size, index_entry_offset;
689         const char *ext = NULL;
690         int i, ret;
691
692         if (strlen(isofile) >= 4)
693                 ext = isofile + strlen(isofile) - 4;
694         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
695                 return -1;
696
697         fseeko(cdHandle, 0, SEEK_SET);
698
699         numtracks = 0;
700
701         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
702         if (ret != sizeof(pbp_hdr)) {
703                 SysPrintf("failed to read pbp\n");
704                 goto fail_io;
705         }
706
707         psar_offs = SWAP32(pbp_hdr.psar_offs);
708
709         ret = fseeko(cdHandle, psar_offs, SEEK_SET);
710         if (ret != 0) {
711                 SysPrintf("failed to seek to %x\n", psar_offs);
712                 goto fail_io;
713         }
714
715         psisoimg_offs = psar_offs;
716         if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
717                 goto fail_io;
718         psar_sig[10] = 0;
719         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
720                 // multidisk image?
721                 ret = fseeko(cdHandle, psar_offs + 0x200, SEEK_SET);
722                 if (ret != 0) {
723                         SysPrintf("failed to seek to %x\n", psar_offs + 0x200);
724                         goto fail_io;
725                 }
726
727                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
728                         SysPrintf("failed to read offsettab\n");
729                         goto fail_io;
730                 }
731
732                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
733                         if (offsettab[i] == 0)
734                                 break;
735                 }
736                 cdrIsoMultidiskCount = i;
737                 if (cdrIsoMultidiskCount == 0) {
738                         SysPrintf("multidisk eboot has 0 images?\n");
739                         goto fail_io;
740                 }
741
742                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
743                         cdrIsoMultidiskSelect = 0;
744
745                 psisoimg_offs += SWAP32(offsettab[cdrIsoMultidiskSelect]);
746
747                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
748                 if (ret != 0) {
749                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
750                         goto fail_io;
751                 }
752
753                 if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
754                         goto fail_io;
755                 psar_sig[10] = 0;
756         }
757
758         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
759                 SysPrintf("bad psar_sig: %s\n", psar_sig);
760                 goto fail_io;
761         }
762
763         // seek to TOC
764         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
765         if (ret != 0) {
766                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
767                 goto fail_io;
768         }
769
770         // first 3 entries are special
771         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
772         if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
773                 goto fail_io;
774         numtracks = btoi(toc_entry.index1[0]);
775
776         if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
777                 goto fail_io;
778         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
779                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
780
781         for (i = 1; i <= numtracks; i++) {
782                 if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
783                         goto fail_io;
784
785                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
786
787                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
788                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
789                 ti[i].start_offset *= 2352;
790                 ti[i].start[0] = btoi(toc_entry.index1[0]);
791                 ti[i].start[1] = btoi(toc_entry.index1[1]);
792                 ti[i].start[2] = btoi(toc_entry.index1[2]);
793
794                 if (i > 1) {
795                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
796                         sec2msf(t, ti[i - 1].length);
797                 }
798         }
799         t = cd_length - ti[numtracks].start_offset / 2352;
800         sec2msf(t, ti[numtracks].length);
801
802         // seek to ISO index
803         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
804         if (ret != 0) {
805                 SysPrintf("failed to seek to ISO index\n");
806                 goto fail_io;
807         }
808
809         compr_img = calloc(1, sizeof(*compr_img));
810         if (compr_img == NULL)
811                 goto fail_io;
812
813         compr_img->block_shift = 4;
814         compr_img->current_block = (unsigned int)-1;
815
816         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
817         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
818         if (compr_img->index_table == NULL)
819                 goto fail_io;
820
821         cdimg_base = psisoimg_offs + 0x100000;
822         for (i = 0; i < compr_img->index_len; i++) {
823                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
824                 if (ret != sizeof(index_entry)) {
825                         SysPrintf("failed to read index_entry #%d\n", i);
826                         goto fail_index;
827                 }
828
829                 index_entry_size = SWAP32(index_entry.size);
830                 index_entry_offset = SWAP32(index_entry.offset);
831
832                 if (index_entry_size == 0)
833                         break;
834
835                 compr_img->index_table[i] = cdimg_base + index_entry_offset;
836         }
837         compr_img->index_table[i] = cdimg_base + index_entry_offset + index_entry_size;
838
839         return 0;
840
841 fail_index:
842         free(compr_img->index_table);
843         compr_img->index_table = NULL;
844         goto done;
845
846 fail_io:
847 #ifndef NDEBUG
848         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
849 #endif
850
851 done:
852         if (compr_img != NULL) {
853                 free(compr_img);
854                 compr_img = NULL;
855         }
856         return -1;
857 }
858
859 static int handlecbin(const char *isofile) {
860         struct
861         {
862                 char magic[4];
863                 unsigned int header_size;
864                 unsigned long long total_bytes;
865                 unsigned int block_size;
866                 unsigned char ver;              // 1
867                 unsigned char align;
868                 unsigned char rsv_06[2];
869         } ciso_hdr;
870         const char *ext = NULL;
871         unsigned int *index_table = NULL;
872         unsigned int index = 0, plain;
873         int i, ret;
874
875         if (strlen(isofile) >= 5)
876                 ext = isofile + strlen(isofile) - 5;
877         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
878                 return -1;
879
880         fseek(cdHandle, 0, SEEK_SET);
881
882         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
883         if (ret != sizeof(ciso_hdr)) {
884                 SysPrintf("failed to read ciso header\n");
885                 return -1;
886         }
887
888         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
889                 SysPrintf("bad ciso header\n");
890                 return -1;
891         }
892         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
893                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
894                 if (ret != 0) {
895                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
896                         return -1;
897                 }
898         }
899
900         compr_img = calloc(1, sizeof(*compr_img));
901         if (compr_img == NULL)
902                 goto fail_io;
903
904         compr_img->block_shift = 0;
905         compr_img->current_block = (unsigned int)-1;
906
907         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
908         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
909         if (index_table == NULL)
910                 goto fail_io;
911
912         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
913         if (ret != compr_img->index_len) {
914                 SysPrintf("failed to read index table\n");
915                 goto fail_index;
916         }
917
918         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
919         if (compr_img->index_table == NULL)
920                 goto fail_index;
921
922         for (i = 0; i < compr_img->index_len + 1; i++) {
923                 index = index_table[i];
924                 plain = index & 0x80000000;
925                 index &= 0x7fffffff;
926                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
927                 if (plain)
928                         compr_img->index_table[i] |= OFF_T_MSB;
929         }
930
931         return 0;
932
933 fail_index:
934         free(index_table);
935 fail_io:
936         if (compr_img != NULL) {
937                 free(compr_img);
938                 compr_img = NULL;
939         }
940         return -1;
941 }
942
943 #ifdef HAVE_CHD
944 static int handlechd(const char *isofile) {
945         int frame_offset = 150;
946         int file_offset = 0;
947
948         chd_img = calloc(1, sizeof(*chd_img));
949         if (chd_img == NULL)
950                 goto fail_io;
951
952         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
953                 goto fail_io;
954
955         if (Config.CHD_Precache && (chd_precache(chd_img->chd) != CHDERR_NONE))
956                 goto fail_io;
957
958    chd_img->header = chd_get_header(chd_img->chd);
959
960    chd_img->buffer = malloc(chd_img->header->hunkbytes);
961    if (chd_img->buffer == NULL)
962                 goto fail_io;
963
964    chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
965    chd_img->current_hunk = (unsigned int)-1;
966
967    cddaBigEndian = TRUE;
968
969         numtracks = 0;
970         memset(ti, 0, sizeof(ti));
971
972    while (1)
973    {
974       struct {
975          char type[64];
976          char subtype[32];
977          char pgtype[32];
978          char pgsub[32];
979          uint32_t track;
980          uint32_t frames;
981          uint32_t pregap;
982          uint32_t postgap;
983       } md = {};
984       char meta[256];
985       uint32_t meta_size = 0;
986
987       if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
988          sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
989       else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
990          sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
991       else
992          break;
993
994                 SysPrintf("chd: %s\n", meta);
995
996                 if (md.track == 1) {
997                         if (!strncmp(md.subtype, "RW", 2)) {
998                                 subChanMixed = TRUE;
999                                 if (!strcmp(md.subtype, "RW_RAW"))
1000                                         subChanRaw = TRUE;
1001                         }
1002                 }
1003
1004                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
1005
1006                 sec2msf(frame_offset + md.pregap, ti[md.track].start);
1007                 sec2msf(md.frames, ti[md.track].length);
1008
1009                 ti[md.track].start_offset = file_offset + md.pregap;
1010
1011                 // XXX: what about postgap?
1012                 frame_offset += md.frames;
1013                 file_offset += md.frames;
1014                 numtracks++;
1015         }
1016
1017         if (numtracks)
1018                 return 0;
1019
1020 fail_io:
1021         if (chd_img != NULL) {
1022                 free(chd_img->buffer);
1023                 free(chd_img);
1024                 chd_img = NULL;
1025         }
1026         return -1;
1027 }
1028 #endif
1029
1030 // this function tries to get the .sub file of the given .img
1031 static int opensubfile(const char *isoname) {
1032         char            subname[MAXPATHLEN];
1033
1034         // copy name of the iso and change extension from .img to .sub
1035         strncpy(subname, isoname, sizeof(subname));
1036         subname[MAXPATHLEN - 1] = '\0';
1037         if (strlen(subname) >= 4) {
1038                 strcpy(subname + strlen(subname) - 4, ".sub");
1039         }
1040         else {
1041                 return -1;
1042         }
1043
1044         subHandle = fopen(subname, "rb");
1045         if (subHandle == NULL) {
1046                 return -1;
1047         }
1048
1049         return 0;
1050 }
1051
1052 static int opensbifile(const char *isoname) {
1053         char            sbiname[MAXPATHLEN], disknum[MAXPATHLEN] = "0";
1054         int             s;
1055
1056         strncpy(sbiname, isoname, sizeof(sbiname));
1057         sbiname[MAXPATHLEN - 1] = '\0';
1058         if (strlen(sbiname) >= 4) {
1059                 if (cdrIsoMultidiskCount > 1) {
1060                         sprintf(disknum, "_%i.sbi", cdrIsoMultidiskSelect + 1);
1061                         strcpy(sbiname + strlen(sbiname) - 4, disknum);
1062                 }
1063                 else
1064                         strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1065         }
1066         else {
1067                 return -1;
1068         }
1069
1070         fseek(cdHandle, 0, SEEK_END);
1071         s = ftell(cdHandle) / 2352;
1072
1073         return LoadSBI(sbiname, s);
1074 }
1075
1076 #ifdef _WIN32
1077 static void readThreadStop() {}
1078 static void readThreadStart() {}
1079 #else
1080 static pthread_t read_thread_id;
1081
1082 static pthread_cond_t read_thread_msg_avail;
1083 static pthread_cond_t read_thread_msg_done;
1084 static pthread_mutex_t read_thread_msg_lock;
1085
1086 static pthread_cond_t sectorbuffer_cond;
1087 static pthread_mutex_t sectorbuffer_lock;
1088
1089 static boolean read_thread_running = FALSE;
1090 static int read_thread_sector_start = -1;
1091 static int read_thread_sector_end = -1;
1092
1093 typedef struct {
1094   int sector;
1095   long ret;
1096   unsigned char data[CD_FRAMESIZE_RAW];
1097 } SectorBufferEntry;
1098
1099 #define SECTOR_BUFFER_SIZE 4096
1100
1101 static SectorBufferEntry *sectorbuffer;
1102 static size_t sectorbuffer_index;
1103
1104 int (*sync_cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
1105 unsigned char *(*sync_CDR_getBuffer)(void);
1106
1107 static unsigned char * CALLBACK ISOgetBuffer_async(void);
1108 static int cdread_async(FILE *f, unsigned int base, void *dest, int sector);
1109
1110 static void *readThreadMain(void *param) {
1111   int max_sector = -1;
1112   int requested_sector_start = -1;
1113   int requested_sector_end = -1;
1114   int last_read_sector = -1;
1115   int index = 0;
1116
1117   int ra_sector = -1;
1118   int max_ra = 128;
1119   int initial_ra = 1;
1120   int speedmult_ra = 4;
1121
1122   int ra_count = 0;
1123   int how_far_ahead = 0;
1124
1125   unsigned char tmpdata[CD_FRAMESIZE_RAW];
1126   long ret;
1127
1128   max_sector = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1129
1130   while(1) {
1131     pthread_mutex_lock(&read_thread_msg_lock);
1132
1133     // If we don't have readahead and we don't have a sector request, wait for one.
1134     // If we still have readahead to go, don't block, just keep going.
1135     // And if we ever have a sector request pending, acknowledge and reset it.
1136
1137     if (!ra_count) {
1138       if (read_thread_sector_start == -1 && read_thread_running) {
1139         pthread_cond_wait(&read_thread_msg_avail, &read_thread_msg_lock);
1140       }
1141     }
1142
1143     if (read_thread_sector_start != -1) {
1144       requested_sector_start = read_thread_sector_start;
1145       requested_sector_end = read_thread_sector_end;
1146       read_thread_sector_start = -1;
1147       read_thread_sector_end = -1;
1148       pthread_cond_signal(&read_thread_msg_done);
1149     }
1150
1151     pthread_mutex_unlock(&read_thread_msg_lock);
1152
1153     if (!read_thread_running)
1154       break;
1155
1156     // Readahead code, based on the implementation in mednafen psx's cdromif.cpp
1157     if (requested_sector_start != -1) {
1158       if (last_read_sector != -1 && last_read_sector == (requested_sector_start - 1)) {
1159         how_far_ahead = ra_sector - requested_sector_end;
1160
1161         if(how_far_ahead <= max_ra)
1162           ra_count = (max_ra - how_far_ahead + 1 ? max_ra - how_far_ahead + 1 : speedmult_ra);
1163         else
1164           ra_count++;
1165       } else if (requested_sector_end != last_read_sector) {
1166         ra_sector = requested_sector_end;
1167         ra_count = initial_ra;
1168       }
1169
1170       last_read_sector = requested_sector_end;
1171     }
1172
1173     index = ra_sector % SECTOR_BUFFER_SIZE;
1174
1175     // check for end of CD
1176     if (ra_count && ra_sector >= max_sector) {
1177       ra_count = 0;
1178       pthread_mutex_lock(&sectorbuffer_lock);
1179       sectorbuffer[index].ret = -1;
1180       sectorbuffer[index].sector = ra_sector;
1181       pthread_cond_signal(&sectorbuffer_cond);
1182       pthread_mutex_unlock(&sectorbuffer_lock);
1183     }
1184
1185     if (ra_count) {
1186       pthread_mutex_lock(&sectorbuffer_lock);
1187       if (sectorbuffer[index].sector != ra_sector) {
1188         pthread_mutex_unlock(&sectorbuffer_lock);
1189
1190         ret = sync_cdimg_read_func(cdHandle, 0, tmpdata, ra_sector);
1191
1192         pthread_mutex_lock(&sectorbuffer_lock);
1193         sectorbuffer[index].ret = ret;
1194         sectorbuffer[index].sector = ra_sector;
1195         memcpy(sectorbuffer[index].data, tmpdata, CD_FRAMESIZE_RAW);
1196       }
1197       pthread_cond_signal(&sectorbuffer_cond);
1198       pthread_mutex_unlock(&sectorbuffer_lock);
1199
1200       ra_sector++;
1201       ra_count--;
1202     }
1203   }
1204
1205   return NULL;
1206 }
1207
1208 static void readThreadStop() {
1209   if (read_thread_running == TRUE) {
1210     read_thread_running = FALSE;
1211     pthread_cond_signal(&read_thread_msg_avail);
1212     pthread_join(read_thread_id, NULL);
1213   }
1214
1215   pthread_cond_destroy(&read_thread_msg_done);
1216   pthread_cond_destroy(&read_thread_msg_avail);
1217   pthread_mutex_destroy(&read_thread_msg_lock);
1218
1219   pthread_cond_destroy(&sectorbuffer_cond);
1220   pthread_mutex_destroy(&sectorbuffer_lock);
1221
1222   CDR_getBuffer = sync_CDR_getBuffer;
1223   cdimg_read_func = sync_cdimg_read_func;
1224
1225   free(sectorbuffer);
1226   sectorbuffer = NULL;
1227 }
1228
1229 static void readThreadStart() {
1230   SysPrintf("Starting async CD thread\n");
1231
1232   if (read_thread_running == TRUE)
1233     return;
1234
1235   read_thread_running = TRUE;
1236   read_thread_sector_start = -1;
1237   read_thread_sector_end = -1;
1238   sectorbuffer_index = 0;
1239
1240   sectorbuffer = calloc(SECTOR_BUFFER_SIZE, sizeof(SectorBufferEntry));
1241   if(!sectorbuffer)
1242     goto error;
1243
1244   sectorbuffer[0].sector = -1; // Otherwise we might think we've already fetched sector 0!
1245
1246   sync_CDR_getBuffer = CDR_getBuffer;
1247   CDR_getBuffer = ISOgetBuffer_async;
1248   sync_cdimg_read_func = cdimg_read_func;
1249   cdimg_read_func = cdread_async;
1250
1251   if (pthread_cond_init(&read_thread_msg_avail, NULL) ||
1252       pthread_cond_init(&read_thread_msg_done, NULL) ||
1253       pthread_mutex_init(&read_thread_msg_lock, NULL) ||
1254       pthread_cond_init(&sectorbuffer_cond, NULL) ||
1255       pthread_mutex_init(&sectorbuffer_lock, NULL) ||
1256       pthread_create(&read_thread_id, NULL, readThreadMain, NULL))
1257     goto error;
1258
1259   return;
1260
1261  error:
1262   SysPrintf("Error starting async CD thread\n");
1263   SysPrintf("Falling back to sync\n");
1264
1265   readThreadStop();
1266 }
1267 #endif
1268
1269 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1270 {
1271         fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET);
1272         return fread(dest, 1, CD_FRAMESIZE_RAW, f);
1273 }
1274
1275 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1276 {
1277         int ret;
1278
1279         fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET);
1280         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1281         if (fread(subbuffer, 1, SUB_FRAMESIZE, f) != SUB_FRAMESIZE)
1282                 goto fail_io;
1283
1284         if (subChanRaw) DecodeRawSubData();
1285         goto done;
1286
1287 fail_io:
1288 #ifndef NDEBUG
1289         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
1290 #endif
1291
1292 done:
1293         return ret;
1294 }
1295
1296 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1297 {
1298         static z_stream z;
1299         int ret = 0;
1300
1301         if (z.zalloc == NULL) {
1302                 // XXX: one-time leak here..
1303                 z.next_in = Z_NULL;
1304                 z.avail_in = 0;
1305                 z.zalloc = Z_NULL;
1306                 z.zfree = Z_NULL;
1307                 z.opaque = Z_NULL;
1308                 ret = inflateInit2(&z, -15);
1309         }
1310         else
1311                 ret = inflateReset(&z);
1312         if (ret != Z_OK)
1313                 return ret;
1314
1315         z.next_in = in;
1316         z.avail_in = in_size;
1317         z.next_out = out;
1318         z.avail_out = *out_size;
1319
1320         ret = inflate(&z, Z_NO_FLUSH);
1321         //inflateEnd(&z);
1322
1323         *out_size -= z.avail_out;
1324         return ret == 1 ? 0 : ret;
1325 }
1326
1327 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1328 {
1329         unsigned long cdbuffer_size, cdbuffer_size_expect;
1330         unsigned int size;
1331         int is_compressed;
1332         off_t start_byte;
1333         int ret, block;
1334
1335         if (base)
1336                 sector += base / 2352;
1337
1338         block = sector >> compr_img->block_shift;
1339         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1340
1341         if (block == compr_img->current_block) {
1342                 //printf("hit sect %d\n", sector);
1343                 goto finish;
1344         }
1345
1346         if (sector >= compr_img->index_len * 16) {
1347                 SysPrintf("sector %d is past img end\n", sector);
1348                 return -1;
1349         }
1350
1351         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1352         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1353                 SysPrintf("seek error for block %d at %llx: ",
1354                         block, (long long)start_byte);
1355                 perror(NULL);
1356                 return -1;
1357         }
1358
1359         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1360         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1361         if (size > sizeof(compr_img->buff_compressed)) {
1362                 SysPrintf("block %d is too large: %u\n", block, size);
1363                 return -1;
1364         }
1365
1366         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1367                                 1, size, cdHandle) != size) {
1368                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1369                 perror(NULL);
1370                 return -1;
1371         }
1372
1373         if (is_compressed) {
1374                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1375                 cdbuffer_size = cdbuffer_size_expect;
1376                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1377                 if (ret != 0) {
1378                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1379                                         ret, block, sector);
1380                         return -1;
1381                 }
1382                 if (cdbuffer_size != cdbuffer_size_expect)
1383                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1384                                         cdbuffer_size_expect, sector);
1385         }
1386
1387         // done at last!
1388         compr_img->current_block = block;
1389
1390 finish:
1391         if (dest != cdbuffer) // copy avoid HACK
1392                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1393                         CD_FRAMESIZE_RAW);
1394         return CD_FRAMESIZE_RAW;
1395 }
1396
1397 #ifdef HAVE_CHD
1398 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1399 {
1400         int hunk;
1401
1402         if (base)
1403                 sector += base;
1404
1405         hunk = sector / chd_img->sectors_per_hunk;
1406         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1407
1408         if (hunk != chd_img->current_hunk)
1409         {
1410                 chd_read(chd_img->chd, hunk, chd_img->buffer);
1411                 chd_img->current_hunk = hunk;
1412         }
1413
1414         if (dest != cdbuffer) // copy avoid HACK
1415                 memcpy(dest, chd_img->buffer[chd_img->sector_in_hunk],
1416                         CD_FRAMESIZE_RAW);
1417         if (subChanMixed) {
1418                 memcpy(subbuffer, chd_img->buffer[chd_img->sector_in_hunk] + CD_FRAMESIZE_RAW,
1419                         SUB_FRAMESIZE);
1420                 if (subChanRaw)
1421                         DecodeRawSubData();
1422         }
1423         return CD_FRAMESIZE_RAW;
1424 }
1425 #endif
1426 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1427 {
1428         int ret;
1429
1430         fseek(f, base + sector * 2048, SEEK_SET);
1431         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1432
1433         // not really necessary, fake mode 2 header
1434         memset(cdbuffer, 0, 12 * 2);
1435         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1436         cdbuffer[12 + 3] = 1;
1437
1438         return ret;
1439 }
1440
1441 #ifndef _WIN32
1442
1443 static int cdread_async(FILE *f, unsigned int base, void *dest, int sector) {
1444   boolean found = FALSE;
1445   int i = sector % SECTOR_BUFFER_SIZE;
1446   long ret;
1447
1448   if (f != cdHandle || base != 0 || dest != cdbuffer) {
1449     // Async reads are only supported for cdbuffer, so call the sync
1450     // function directly.
1451     return sync_cdimg_read_func(f, base, dest, sector);
1452   }
1453
1454   pthread_mutex_lock(&read_thread_msg_lock);
1455
1456   // Only wait if we're not trying to read the next sector and
1457   // sector_start is set (meaning the last request hasn't been
1458   // processed yet)
1459   while(read_thread_sector_start != -1 && read_thread_sector_end + 1 != sector) {
1460     pthread_cond_wait(&read_thread_msg_done, &read_thread_msg_lock);
1461   }
1462
1463   if (read_thread_sector_start == -1)
1464     read_thread_sector_start = sector;
1465
1466   read_thread_sector_end = sector;
1467   pthread_cond_signal(&read_thread_msg_avail);
1468   pthread_mutex_unlock(&read_thread_msg_lock);
1469
1470   do {
1471     pthread_mutex_lock(&sectorbuffer_lock);
1472     if (sectorbuffer[i].sector == sector) {
1473       sectorbuffer_index = i;
1474       ret = sectorbuffer[i].ret;
1475       found = TRUE;
1476     }
1477
1478     if (!found) {
1479       pthread_cond_wait(&sectorbuffer_cond, &sectorbuffer_lock);
1480     }
1481     pthread_mutex_unlock(&sectorbuffer_lock);
1482   } while (!found);
1483
1484   return ret;
1485 }
1486
1487 #endif
1488
1489 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1490         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1491 }
1492
1493 #ifdef HAVE_CHD
1494 static unsigned char * CALLBACK ISOgetBuffer_chd(void) {
1495         return chd_img->buffer[chd_img->sector_in_hunk] + 12;
1496 }
1497 #endif
1498
1499 #ifndef _WIN32
1500 static unsigned char * CALLBACK ISOgetBuffer_async(void) {
1501   unsigned char *buffer;
1502   pthread_mutex_lock(&sectorbuffer_lock);
1503   buffer = sectorbuffer[sectorbuffer_index].data;
1504   pthread_mutex_unlock(&sectorbuffer_lock);
1505   return buffer + 12;
1506 }
1507
1508 #endif
1509
1510 static unsigned char * CALLBACK ISOgetBuffer(void) {
1511         return cdbuffer + 12;
1512 }
1513
1514 static void PrintTracks(void) {
1515         int i;
1516
1517         for (i = 1; i <= numtracks; i++) {
1518                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1519                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1520                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1521                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1522         }
1523 }
1524
1525 // This function is invoked by the front-end when opening an ISO
1526 // file for playback
1527 static long CALLBACK ISOopen(void) {
1528         boolean isMode1ISO = FALSE;
1529         char alt_bin_filename[MAXPATHLEN];
1530         const char *bin_filename;
1531         char image_str[1024];
1532         int is_chd = 0;
1533
1534         if (cdHandle != NULL) {
1535                 return 0; // it's already open
1536         }
1537
1538         cdHandle = fopen(GetIsoFile(), "rb");
1539         if (cdHandle == NULL) {
1540                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1541                         GetIsoFile(), strerror(errno));
1542                 return -1;
1543         }
1544
1545         snprintf(image_str, sizeof(image_str) - 6*4 - 1,
1546                 "Loaded CD Image: %s", GetIsoFile());
1547
1548         cddaBigEndian = FALSE;
1549         subChanMixed = FALSE;
1550         subChanRaw = FALSE;
1551         pregapOffset = 0;
1552         cdrIsoMultidiskCount = 1;
1553         multifile = 0;
1554
1555         CDR_getBuffer = ISOgetBuffer;
1556         cdimg_read_func = cdread_normal;
1557
1558         if (parsetoc(GetIsoFile()) == 0) {
1559                 strcat(image_str, "[+toc]");
1560         }
1561         else if (parseccd(GetIsoFile()) == 0) {
1562                 strcat(image_str, "[+ccd]");
1563         }
1564         else if (parsemds(GetIsoFile()) == 0) {
1565                 strcat(image_str, "[+mds]");
1566         }
1567         else if (parsecue(GetIsoFile()) == 0) {
1568                 strcat(image_str, "[+cue]");
1569         }
1570         if (handlepbp(GetIsoFile()) == 0) {
1571                 strcat(image_str, "[+pbp]");
1572                 CDR_getBuffer = ISOgetBuffer_compr;
1573                 cdimg_read_func = cdread_compressed;
1574         }
1575         else if (handlecbin(GetIsoFile()) == 0) {
1576                 strcat(image_str, "[+cbin]");
1577                 CDR_getBuffer = ISOgetBuffer_compr;
1578                 cdimg_read_func = cdread_compressed;
1579         }
1580 #ifdef HAVE_CHD
1581         else if (handlechd(GetIsoFile()) == 0) {
1582                 strcat(image_str, "[+chd]");
1583                 CDR_getBuffer = ISOgetBuffer_chd;
1584                 cdimg_read_func = cdread_chd;
1585                 is_chd = 1;
1586         }
1587 #endif
1588
1589         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1590                 strcat(image_str, "[+sub]");
1591         }
1592         if (opensbifile(GetIsoFile()) == 0) {
1593                 strcat(image_str, "[+sbi]");
1594         }
1595
1596         fseeko(cdHandle, 0, SEEK_END);
1597
1598         // maybe user selected metadata file instead of main .bin ..
1599         bin_filename = GetIsoFile();
1600         if (ftello(cdHandle) < 2352 * 0x10) {
1601                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1602                 FILE *tmpf = NULL;
1603                 size_t i;
1604                 char *p;
1605
1606                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1607                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1608                 if (strlen(alt_bin_filename) >= 4) {
1609                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1610                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1611                                 strcpy(p, exts[i]);
1612                                 tmpf = fopen(alt_bin_filename, "rb");
1613                                 if (tmpf != NULL)
1614                                         break;
1615                         }
1616                 }
1617                 if (tmpf != NULL) {
1618                         bin_filename = alt_bin_filename;
1619                         fclose(cdHandle);
1620                         cdHandle = tmpf;
1621                         fseeko(cdHandle, 0, SEEK_END);
1622                 }
1623         }
1624
1625         // guess whether it is mode1/2048
1626         if (ftello(cdHandle) % 2048 == 0) {
1627                 unsigned int modeTest = 0;
1628                 fseek(cdHandle, 0, SEEK_SET);
1629                 if (!fread(&modeTest, sizeof(modeTest), 1, cdHandle)) {
1630 #ifndef NDEBUG
1631                         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
1632 #endif
1633                         return -1;
1634                 }
1635                 if (SWAP32(modeTest) != 0xffffff00) {
1636                         strcat(image_str, "[2048]");
1637                         isMode1ISO = TRUE;
1638                 }
1639         }
1640         fseek(cdHandle, 0, SEEK_SET);
1641
1642         SysPrintf("%s.\n", image_str);
1643
1644         PrintTracks();
1645
1646         if (subChanMixed && !is_chd)
1647                 cdimg_read_func = cdread_sub_mixed;
1648         else if (isMode1ISO)
1649                 cdimg_read_func = cdread_2048;
1650
1651         // make sure we have another handle open for cdda
1652         if (numtracks > 1 && ti[1].handle == NULL) {
1653                 ti[1].handle = fopen(bin_filename, "rb");
1654         }
1655         cdda_cur_sector = 0;
1656         cdda_file_offset = 0;
1657
1658   if (Config.AsyncCD) {
1659     readThreadStart();
1660   }
1661         return 0;
1662 }
1663
1664 static long CALLBACK ISOclose(void) {
1665         int i;
1666
1667         if (cdHandle != NULL) {
1668                 fclose(cdHandle);
1669                 cdHandle = NULL;
1670         }
1671         if (subHandle != NULL) {
1672                 fclose(subHandle);
1673                 subHandle = NULL;
1674         }
1675         playing = FALSE;
1676         cddaHandle = NULL;
1677
1678         if (compr_img != NULL) {
1679                 free(compr_img->index_table);
1680                 free(compr_img);
1681                 compr_img = NULL;
1682         }
1683
1684 #ifdef HAVE_CHD
1685         if (chd_img != NULL) {
1686                 chd_close(chd_img->chd);
1687                 free(chd_img->buffer);
1688                 free(chd_img);
1689                 chd_img = NULL;
1690         }
1691 #endif
1692
1693         for (i = 1; i <= numtracks; i++) {
1694                 if (ti[i].handle != NULL) {
1695                         fclose(ti[i].handle);
1696                         ti[i].handle = NULL;
1697                 }
1698         }
1699         numtracks = 0;
1700         ti[1].type = 0;
1701         UnloadSBI();
1702
1703         memset(cdbuffer, 0, sizeof(cdbuffer));
1704         CDR_getBuffer = ISOgetBuffer;
1705
1706         if (Config.AsyncCD) {
1707                 readThreadStop();
1708         }
1709
1710         return 0;
1711 }
1712
1713 static long CALLBACK ISOinit(void) {
1714         assert(cdHandle == NULL);
1715         assert(subHandle == NULL);
1716
1717         return 0; // do nothing
1718 }
1719
1720 static long CALLBACK ISOshutdown(void) {
1721         ISOclose();
1722         return 0;
1723 }
1724
1725 // return Starting and Ending Track
1726 // buffer:
1727 //  byte 0 - start track
1728 //  byte 1 - end track
1729 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1730         buffer[0] = 1;
1731
1732         if (numtracks > 0) {
1733                 buffer[1] = numtracks;
1734         }
1735         else {
1736                 buffer[1] = 1;
1737         }
1738
1739         return 0;
1740 }
1741
1742 // return Track Time
1743 // buffer:
1744 //  byte 0 - frame
1745 //  byte 1 - second
1746 //  byte 2 - minute
1747 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1748         if (track == 0) {
1749                 unsigned int sect;
1750                 unsigned char time[3];
1751                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1752                 sec2msf(sect, (char *)time);
1753                 buffer[2] = time[0];
1754                 buffer[1] = time[1];
1755                 buffer[0] = time[2];
1756         }
1757         else if (numtracks > 0 && track <= numtracks) {
1758                 buffer[2] = ti[track].start[0];
1759                 buffer[1] = ti[track].start[1];
1760                 buffer[0] = ti[track].start[2];
1761         }
1762         else {
1763                 buffer[2] = 0;
1764                 buffer[1] = 2;
1765                 buffer[0] = 0;
1766         }
1767
1768         return 0;
1769 }
1770
1771 // decode 'raw' subchannel data ripped by cdrdao
1772 static void DecodeRawSubData(void) {
1773         unsigned char subQData[12];
1774         int i;
1775
1776         memset(subQData, 0, sizeof(subQData));
1777
1778         for (i = 0; i < 8 * 12; i++) {
1779                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1780                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1781                 }
1782         }
1783
1784         memcpy(&subbuffer[12], subQData, 12);
1785 }
1786
1787 // read track
1788 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1789 // uses bcd format
1790 static boolean CALLBACK ISOreadTrack(unsigned char *time) {
1791         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1792         long ret;
1793
1794         if (cdHandle == NULL) {
1795                 return 0;
1796         }
1797
1798         if (pregapOffset) {
1799                 subChanMissing = FALSE;
1800                 if (sector >= pregapOffset) {
1801                         sector -= 2 * 75;
1802                         if (sector < pregapOffset)
1803                                 subChanMissing = TRUE;
1804                 }
1805         }
1806
1807         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1808         if (ret < 0)
1809                 return 0;
1810
1811         if (subHandle != NULL) {
1812                 fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET);
1813                 if (fread(subbuffer, 1, SUB_FRAMESIZE, subHandle) != SUB_FRAMESIZE)
1814                         /* Faulty subchannel data shouldn't cause a read failure */
1815                         return 1;
1816
1817                 if (subChanRaw) DecodeRawSubData();
1818         }
1819
1820         return 1;
1821 }
1822
1823 // plays cdda audio
1824 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1825 // does NOT uses bcd format
1826 static long CALLBACK ISOplay(unsigned char *time) {
1827         playing = TRUE;
1828         return 0;
1829 }
1830
1831 // stops cdda audio
1832 static long CALLBACK ISOstop(void) {
1833         playing = FALSE;
1834         return 0;
1835 }
1836
1837 // gets subchannel data
1838 static unsigned char* CALLBACK ISOgetBufferSub(void) {
1839         if ((subHandle != NULL || subChanMixed) && !subChanMissing) {
1840                 return subbuffer;
1841         }
1842
1843         return NULL;
1844 }
1845
1846 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1847         u32 sect;
1848         
1849         CDR__getStatus(stat);
1850         
1851         if (playing) {
1852                 stat->Type = 0x02;
1853                 stat->Status |= 0x80;
1854         }
1855         else {
1856                 // BIOS - boot ID (CD type)
1857                 stat->Type = ti[1].type;
1858         }
1859         
1860         // relative -> absolute time
1861         sect = cddaCurPos;
1862         sec2msf(sect, (char *)stat->Time);
1863         
1864         return 0;
1865 }
1866
1867 // read CDDA sector into buffer
1868 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1869         unsigned char msf[3] = {m, s, f};
1870         unsigned int file, track, track_start = 0;
1871         int ret;
1872
1873         cddaCurPos = msf2sec((char *)msf);
1874
1875         // find current track index
1876         for (track = numtracks; ; track--) {
1877                 track_start = msf2sec(ti[track].start);
1878                 if (track_start <= cddaCurPos)
1879                         break;
1880                 if (track == 1)
1881                         break;
1882         }
1883
1884         // data tracks play silent
1885         if (ti[track].type != CDDA) {
1886                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1887                 return 0;
1888         }
1889
1890         file = 1;
1891         if (multifile) {
1892                 // find the file that contains this track
1893                 for (file = track; file > 1; file--)
1894                         if (ti[file].handle != NULL)
1895                                 break;
1896         }
1897
1898         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1899                 buffer, cddaCurPos - track_start);
1900         if (ret != CD_FRAMESIZE_RAW) {
1901                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1902                 return -1;
1903         }
1904
1905         if (cddaBigEndian) {
1906                 int i;
1907                 unsigned char tmp;
1908
1909                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1910                         tmp = buffer[i * 2];
1911                         buffer[i * 2] = buffer[i * 2 + 1];
1912                         buffer[i * 2 + 1] = tmp;
1913                 }
1914         }
1915
1916         return 0;
1917 }
1918
1919 void cdrIsoInit(void) {
1920         CDR_init = ISOinit;
1921         CDR_shutdown = ISOshutdown;
1922         CDR_open = ISOopen;
1923         CDR_close = ISOclose;
1924         CDR_getTN = ISOgetTN;
1925         CDR_getTD = ISOgetTD;
1926         CDR_readTrack = ISOreadTrack;
1927         CDR_getBuffer = ISOgetBuffer;
1928         CDR_play = ISOplay;
1929         CDR_stop = ISOstop;
1930         CDR_getBufferSub = ISOgetBufferSub;
1931         CDR_getStatus = ISOgetStatus;
1932         CDR_readCDDA = ISOreadCDDA;
1933
1934         CDR_getDriveLetter = CDR__getDriveLetter;
1935         CDR_configure = CDR__configure;
1936         CDR_test = CDR__test;
1937         CDR_about = CDR__about;
1938         CDR_setfilename = CDR__setfilename;
1939
1940         numtracks = 0;
1941 }
1942
1943 int cdrIsoActive(void) {
1944         return (cdHandle != NULL);
1945 }