1233ba3f23997acbd831a26b563a7c01d97b681d
[pcsx_rearmed.git] / 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 #elif P_HAVE_PTHREAD
40 #include <pthread.h>
41 #include <sys/time.h>
42 #include <unistd.h>
43 #endif
44
45 // to enable the USE_READ_THREAD code, fix:
46 // - https://github.com/notaz/pcsx_rearmed/issues/257
47 // - ISOgetBufferSub to not race with async code
48 #define USE_READ_THREAD 0 //P_HAVE_PTHREAD
49
50 #ifdef USE_LIBRETRO_VFS
51 #include <streams/file_stream_transforms.h>
52 #undef fseeko
53 #undef ftello
54 #define ftello rftell
55 #define fseeko rfseek
56 #endif
57
58 #define OFF_T_MSB ((off_t)1 << (sizeof(off_t) * 8 - 1))
59
60 unsigned int cdrIsoMultidiskCount;
61 unsigned int cdrIsoMultidiskSelect;
62
63 static FILE *cdHandle = NULL;
64 static FILE *cddaHandle = NULL;
65 static FILE *subHandle = NULL;
66
67 static boolean subChanMixed = FALSE;
68 static boolean subChanRaw = FALSE;
69
70 static boolean multifile = FALSE;
71
72 static unsigned char cdbuffer[CD_FRAMESIZE_RAW];
73 static unsigned char subbuffer[SUB_FRAMESIZE];
74
75 static boolean playing = FALSE;
76 static boolean cddaBigEndian = FALSE;
77 /* Frame offset into CD image where pregap data would be found if it was there.
78  * If a game seeks there we must *not* return subchannel data since it's
79  * not in the CD image, so that cdrom code can fake subchannel data instead.
80  * XXX: there could be multiple pregaps but PSX dumps only have one? */
81 static unsigned int pregapOffset;
82
83 static unsigned int cddaCurPos;
84
85 // compressed image stuff
86 static struct {
87         unsigned char buff_raw[16][CD_FRAMESIZE_RAW];
88         unsigned char buff_compressed[CD_FRAMESIZE_RAW * 16 + 100];
89         off_t *index_table;
90         unsigned int index_len;
91         unsigned int block_shift;
92         unsigned int current_block;
93         unsigned int sector_in_blk;
94 } *compr_img;
95
96 #ifdef HAVE_CHD
97 static struct {
98         unsigned char *buffer;
99         chd_file* chd;
100         const chd_header* header;
101         unsigned int sectors_per_hunk;
102         unsigned int current_hunk[2];
103         unsigned int current_buffer;
104         unsigned int sector_in_hunk;
105 } *chd_img;
106 #endif
107
108 static int (*cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
109 static int (*cdimg_read_sub_func)(FILE *f, int sector);
110
111 char* CALLBACK CDR__getDriveLetter(void);
112 long CALLBACK CDR__configure(void);
113 long CALLBACK CDR__test(void);
114 void CALLBACK CDR__about(void);
115 long CALLBACK CDR__setfilename(char *filename);
116 long CALLBACK CDR__getStatus(struct CdrStat *stat);
117
118 static void DecodeRawSubData(void);
119
120 struct trackinfo {
121         enum {DATA=1, CDDA} type;
122         char start[3];          // MSF-format
123         char length[3];         // MSF-format
124         FILE *handle;           // for multi-track images CDDA
125         unsigned int start_offset; // byte offset from start of above file (chd: sector offset)
126 };
127
128 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
129
130 static int numtracks = 0;
131 static struct trackinfo ti[MAXTRACKS];
132
133 // get a sector from a msf-array
134 static unsigned int msf2sec(char *msf) {
135         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
136 }
137
138 static void sec2msf(unsigned int s, char *msf) {
139         msf[0] = s / 75 / 60;
140         s = s - msf[0] * 75 * 60;
141         msf[1] = s / 75;
142         s = s - msf[1] * 75;
143         msf[2] = s;
144 }
145
146 // divide a string of xx:yy:zz into m, s, f
147 static void tok2msf(char *time, char *msf) {
148         char *token;
149
150         token = strtok(time, ":");
151         if (token) {
152                 msf[0] = atoi(token);
153         }
154         else {
155                 msf[0] = 0;
156         }
157
158         token = strtok(NULL, ":");
159         if (token) {
160                 msf[1] = atoi(token);
161         }
162         else {
163                 msf[1] = 0;
164         }
165
166         token = strtok(NULL, ":");
167         if (token) {
168                 msf[2] = atoi(token);
169         }
170         else {
171                 msf[2] = 0;
172         }
173 }
174
175 // this function tries to get the .toc file of the given .bin
176 // the necessary data is put into the ti (trackinformation)-array
177 static int parsetoc(const char *isofile) {
178         char                    tocname[MAXPATHLEN];
179         FILE                    *fi;
180         char                    linebuf[256], tmp[256], name[256];
181         char                    *token;
182         char                    time[20], time2[20];
183         unsigned int    t, sector_offs, sector_size;
184         unsigned int    current_zero_gap = 0;
185
186         numtracks = 0;
187
188         // copy name of the iso and change extension from .bin to .toc
189         strncpy(tocname, isofile, sizeof(tocname));
190         tocname[MAXPATHLEN - 1] = '\0';
191         if (strlen(tocname) >= 4) {
192                 strcpy(tocname + strlen(tocname) - 4, ".toc");
193         }
194         else {
195                 return -1;
196         }
197
198         if ((fi = fopen(tocname, "r")) == NULL) {
199                 // try changing extension to .cue (to satisfy some stupid tutorials)
200                 strcpy(tocname + strlen(tocname) - 4, ".cue");
201                 if ((fi = fopen(tocname, "r")) == NULL) {
202                         // if filename is image.toc.bin, try removing .bin (for Brasero)
203                         strcpy(tocname, isofile);
204                         t = strlen(tocname);
205                         if (t >= 8 && strcmp(tocname + t - 8, ".toc.bin") == 0) {
206                                 tocname[t - 4] = '\0';
207                                 if ((fi = fopen(tocname, "r")) == NULL) {
208                                         return -1;
209                                 }
210                         }
211                         else {
212                                 return -1;
213                         }
214                 }
215                 // check if it's really a TOC named as a .cue
216                 if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
217                         token = strtok(linebuf, " ");
218                         if (token && strncmp(token, "CD", 2) != 0 && strcmp(token, "CATALOG") != 0) {
219                                 fclose(fi);
220                                 return -1;
221                         }
222                 }
223                 fseek(fi, 0, SEEK_SET);
224         }
225
226         memset(&ti, 0, sizeof(ti));
227         cddaBigEndian = TRUE; // cdrdao uses big-endian for CD Audio
228
229         sector_size = CD_FRAMESIZE_RAW;
230         sector_offs = 2 * 75;
231
232         // parse the .toc file
233         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
234                 // search for tracks
235                 strncpy(tmp, linebuf, sizeof(linebuf));
236                 token = strtok(tmp, " ");
237
238                 if (token == NULL) continue;
239
240                 if (!strcmp(token, "TRACK")) {
241                         sector_offs += current_zero_gap;
242                         current_zero_gap = 0;
243
244                         // get type of track
245                         token = strtok(NULL, " ");
246                         numtracks++;
247
248                         if (!strncmp(token, "MODE2_RAW", 9)) {
249                                 ti[numtracks].type = DATA;
250                                 sec2msf(2 * 75, ti[numtracks].start); // assume data track on 0:2:0
251
252                                 // check if this image contains mixed subchannel data
253                                 token = strtok(NULL, " ");
254                                 if (token != NULL && !strncmp(token, "RW", 2)) {
255                                         sector_size = CD_FRAMESIZE_RAW + SUB_FRAMESIZE;
256                                         subChanMixed = TRUE;
257                                         if (!strncmp(token, "RW_RAW", 6))
258                                                 subChanRaw = TRUE;
259                                 }
260                         }
261                         else if (!strncmp(token, "AUDIO", 5)) {
262                                 ti[numtracks].type = CDDA;
263                         }
264                 }
265                 else if (!strcmp(token, "DATAFILE")) {
266                         if (ti[numtracks].type == CDDA) {
267                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" #%d %8s", name, &t, time2);
268                                 ti[numtracks].start_offset = t;
269                                 t = t / sector_size + sector_offs;
270                                 sec2msf(t, (char *)&ti[numtracks].start);
271                                 tok2msf((char *)&time2, (char *)&ti[numtracks].length);
272                         }
273                         else {
274                                 sscanf(linebuf, "DATAFILE \"%[^\"]\" %8s", name, time);
275                                 tok2msf((char *)&time, (char *)&ti[numtracks].length);
276                         }
277                 }
278                 else if (!strcmp(token, "FILE")) {
279                         sscanf(linebuf, "FILE \"%[^\"]\" #%d %8s %8s", name, &t, time, time2);
280                         tok2msf((char *)&time, (char *)&ti[numtracks].start);
281                         t += msf2sec(ti[numtracks].start) * sector_size;
282                         ti[numtracks].start_offset = t;
283                         t = t / sector_size + sector_offs;
284                         sec2msf(t, (char *)&ti[numtracks].start);
285                         tok2msf((char *)&time2, (char *)&ti[numtracks].length);
286                 }
287                 else if (!strcmp(token, "ZERO") || !strcmp(token, "SILENCE")) {
288                         // skip unneeded optional fields
289                         while (token != NULL) {
290                                 token = strtok(NULL, " ");
291                                 if (strchr(token, ':') != NULL)
292                                         break;
293                         }
294                         if (token != NULL) {
295                                 tok2msf(token, tmp);
296                                 current_zero_gap = msf2sec(tmp);
297                         }
298                         if (numtracks > 1) {
299                                 t = ti[numtracks - 1].start_offset;
300                                 t /= sector_size;
301                                 pregapOffset = t + msf2sec(ti[numtracks - 1].length);
302                         }
303                 }
304                 else if (!strcmp(token, "START")) {
305                         token = strtok(NULL, " ");
306                         if (token != NULL && strchr(token, ':')) {
307                                 tok2msf(token, tmp);
308                                 t = msf2sec(tmp);
309                                 ti[numtracks].start_offset += (t - current_zero_gap) * sector_size;
310                                 t = msf2sec(ti[numtracks].start) + t;
311                                 sec2msf(t, (char *)&ti[numtracks].start);
312                         }
313                 }
314         }
315
316         fclose(fi);
317
318         return 0;
319 }
320
321 // this function tries to get the .cue file of the given .bin
322 // the necessary data is put into the ti (trackinformation)-array
323 static int parsecue(const char *isofile) {
324         char                    cuename[MAXPATHLEN];
325         char                    filepath[MAXPATHLEN];
326         char                    *incue_fname;
327         FILE                    *fi;
328         char                    *token;
329         char                    time[20];
330         char                    *tmp;
331         char                    linebuf[256], tmpb[256], dummy[256];
332         unsigned int    incue_max_len;
333         unsigned int    t, file_len, mode, sector_offs;
334         unsigned int    sector_size = 2352;
335
336         numtracks = 0;
337
338         // copy name of the iso and change extension from .bin to .cue
339         strncpy(cuename, isofile, sizeof(cuename));
340         cuename[MAXPATHLEN - 1] = '\0';
341         if (strlen(cuename) >= 4) {
342                 // If 'isofile' is a '.cd<X>' file, use it as a .cue file
343                 //  and don't try to search the additional .cue file
344                 if (strncasecmp(cuename + strlen(cuename) - 4, ".cd", 3) != 0 )
345                         strcpy(cuename + strlen(cuename) - 4, ".cue");
346         }
347         else {
348                 return -1;
349         }
350
351         if ((fi = fopen(cuename, "r")) == NULL) {
352                 return -1;
353         }
354
355         // Some stupid tutorials wrongly tell users to use cdrdao to rip a
356         // "bin/cue" image, which is in fact a "bin/toc" image. So let's check
357         // that...
358         if (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
359                 if (!strncmp(linebuf, "CD_ROM_XA", 9)) {
360                         // Don't proceed further, as this is actually a .toc file rather
361                         // than a .cue file.
362                         fclose(fi);
363                         return parsetoc(isofile);
364                 }
365                 fseek(fi, 0, SEEK_SET);
366         }
367
368         // build a path for files referenced in .cue
369         strncpy(filepath, cuename, sizeof(filepath));
370         tmp = strrchr(filepath, '/');
371         if (tmp == NULL)
372                 tmp = strrchr(filepath, '\\');
373         if (tmp != NULL)
374                 tmp++;
375         else
376                 tmp = filepath;
377         *tmp = 0;
378         filepath[sizeof(filepath) - 1] = 0;
379         incue_fname = tmp;
380         incue_max_len = sizeof(filepath) - (tmp - filepath) - 1;
381
382         memset(&ti, 0, sizeof(ti));
383
384         file_len = 0;
385         sector_offs = 2 * 75;
386
387         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
388                 strncpy(dummy, linebuf, sizeof(linebuf));
389                 token = strtok(dummy, " ");
390
391                 if (token == NULL) {
392                         continue;
393                 }
394
395                 if (!strcmp(token, "TRACK")) {
396                         numtracks++;
397
398                         sector_size = 0;
399                         if (strstr(linebuf, "AUDIO") != NULL) {
400                                 ti[numtracks].type = CDDA;
401                                 sector_size = 2352;
402                         }
403                         else if (sscanf(linebuf, " TRACK %u MODE%u/%u", &t, &mode, &sector_size) == 3)
404                                 ti[numtracks].type = DATA;
405                         else {
406                                 SysPrintf(".cue: failed to parse TRACK\n");
407                                 ti[numtracks].type = numtracks == 1 ? DATA : CDDA;
408                         }
409                         if (sector_size == 0)
410                                 sector_size = 2352;
411                 }
412                 else if (!strcmp(token, "INDEX")) {
413                         if (sscanf(linebuf, " INDEX %02d %8s", &t, time) != 2)
414                                 SysPrintf(".cue: failed to parse INDEX\n");
415                         tok2msf(time, (char *)&ti[numtracks].start);
416
417                         t = msf2sec(ti[numtracks].start);
418                         ti[numtracks].start_offset = t * sector_size;
419                         t += sector_offs;
420                         sec2msf(t, ti[numtracks].start);
421
422                         // default track length to file length
423                         t = file_len - ti[numtracks].start_offset / sector_size;
424                         sec2msf(t, ti[numtracks].length);
425
426                         if (numtracks > 1 && ti[numtracks].handle == NULL) {
427                                 // this track uses the same file as the last,
428                                 // start of this track is last track's end
429                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
430                                 sec2msf(t, ti[numtracks - 1].length);
431                         }
432                         if (numtracks > 1 && pregapOffset == -1)
433                                 pregapOffset = ti[numtracks].start_offset / sector_size;
434                 }
435                 else if (!strcmp(token, "PREGAP")) {
436                         if (sscanf(linebuf, " PREGAP %8s", time) == 1) {
437                                 tok2msf(time, dummy);
438                                 sector_offs += msf2sec(dummy);
439                         }
440                         pregapOffset = -1; // mark to fill track start_offset
441                 }
442                 else if (!strcmp(token, "FILE")) {
443                         t = sscanf(linebuf, " FILE \"%255[^\"]\"", tmpb);
444                         if (t != 1)
445                                 sscanf(linebuf, " FILE %255s", tmpb);
446
447                         tmp = strrchr(tmpb, '\\');
448                         if (tmp == NULL)
449                                 tmp = strrchr(tmpb, '/');
450                         if (tmp != NULL)
451                                 tmp++;
452                         else
453                                 tmp = tmpb;
454                         strncpy(incue_fname, tmp, incue_max_len);
455                         ti[numtracks + 1].handle = fopen(filepath, "rb");
456
457                         // update global offset if this is not first file in this .cue
458                         if (numtracks + 1 > 1) {
459                                 multifile = 1;
460                                 sector_offs += file_len;
461                         }
462
463                         file_len = 0;
464                         if (ti[numtracks + 1].handle == NULL) {
465                                 SysPrintf(_("\ncould not open: %s\n"), filepath);
466                                 continue;
467                         }
468                         fseek(ti[numtracks + 1].handle, 0, SEEK_END);
469                         file_len = ftell(ti[numtracks + 1].handle) / 2352;
470
471                         if (numtracks == 0 && strlen(isofile) >= 4 &&
472                                 (strcmp(isofile + strlen(isofile) - 4, ".cue") == 0 ||
473                                 strncasecmp(isofile + strlen(isofile) - 4, ".cd", 3) == 0)) {
474                                 // user selected .cue/.cdX as image file, use it's data track instead
475                                 fclose(cdHandle);
476                                 cdHandle = fopen(filepath, "rb");
477                         }
478                 }
479         }
480
481         fclose(fi);
482
483         // if there are no tracks detected, then it's not a cue file
484         if (!numtracks)
485                 return -1;
486
487         return 0;
488 }
489
490 // this function tries to get the .ccd file of the given .img
491 // the necessary data is put into the ti (trackinformation)-array
492 static int parseccd(const char *isofile) {
493         char                    ccdname[MAXPATHLEN];
494         FILE                    *fi;
495         char                    linebuf[256];
496         unsigned int    t;
497
498         numtracks = 0;
499
500         // copy name of the iso and change extension from .img to .ccd
501         strncpy(ccdname, isofile, sizeof(ccdname));
502         ccdname[MAXPATHLEN - 1] = '\0';
503         if (strlen(ccdname) >= 4) {
504                 strcpy(ccdname + strlen(ccdname) - 4, ".ccd");
505         }
506         else {
507                 return -1;
508         }
509
510         if ((fi = fopen(ccdname, "r")) == NULL) {
511                 return -1;
512         }
513
514         memset(&ti, 0, sizeof(ti));
515
516         while (fgets(linebuf, sizeof(linebuf), fi) != NULL) {
517                 if (!strncmp(linebuf, "[TRACK", 6)){
518                         numtracks++;
519                 }
520                 else if (!strncmp(linebuf, "MODE=", 5)) {
521                         sscanf(linebuf, "MODE=%d", &t);
522                         ti[numtracks].type = ((t == 0) ? CDDA : DATA);
523                 }
524                 else if (!strncmp(linebuf, "INDEX 1=", 8)) {
525                         sscanf(linebuf, "INDEX 1=%d", &t);
526                         sec2msf(t + 2 * 75, ti[numtracks].start);
527                         ti[numtracks].start_offset = t * 2352;
528
529                         // If we've already seen another track, this is its end
530                         if (numtracks > 1) {
531                                 t = msf2sec(ti[numtracks].start) - msf2sec(ti[numtracks - 1].start);
532                                 sec2msf(t, ti[numtracks - 1].length);
533                         }
534                 }
535         }
536
537         fclose(fi);
538
539         // Fill out the last track's end based on size
540         if (numtracks >= 1) {
541                 fseek(cdHandle, 0, SEEK_END);
542                 t = ftell(cdHandle) / 2352 - msf2sec(ti[numtracks].start) + 2 * 75;
543                 sec2msf(t, ti[numtracks].length);
544         }
545
546         return 0;
547 }
548
549 // this function tries to get the .mds file of the given .mdf
550 // the necessary data is put into the ti (trackinformation)-array
551 static int parsemds(const char *isofile) {
552         char                    mdsname[MAXPATHLEN];
553         FILE                    *fi;
554         unsigned int    offset, extra_offset, l, i;
555         unsigned short  s;
556
557         numtracks = 0;
558
559         // copy name of the iso and change extension from .mdf to .mds
560         strncpy(mdsname, isofile, sizeof(mdsname));
561         mdsname[MAXPATHLEN - 1] = '\0';
562         if (strlen(mdsname) >= 4) {
563                 strcpy(mdsname + strlen(mdsname) - 4, ".mds");
564         }
565         else {
566                 return -1;
567         }
568
569         if ((fi = fopen(mdsname, "rb")) == NULL) {
570                 return -1;
571         }
572
573         memset(&ti, 0, sizeof(ti));
574
575         // check if it's a valid mds file
576         if (fread(&i, 1, sizeof(i), fi) != sizeof(i))
577                 goto fail_io;
578         i = SWAP32(i);
579         if (i != 0x4944454D) {
580                 // not an valid mds file
581                 fclose(fi);
582                 return -1;
583         }
584
585         // get offset to session block
586         fseek(fi, 0x50, SEEK_SET);
587         if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
588                 goto fail_io;
589         offset = SWAP32(offset);
590
591         // get total number of tracks
592         offset += 14;
593         fseek(fi, offset, SEEK_SET);
594         if (fread(&s, 1, sizeof(s), fi) != sizeof(s))
595                 goto fail_io;
596         s = SWAP16(s);
597         numtracks = s;
598
599         // get offset to track blocks
600         fseek(fi, 4, SEEK_CUR);
601         if (fread(&offset, 1, sizeof(offset), fi) != sizeof(offset))
602                 goto fail_io;
603         offset = SWAP32(offset);
604
605         // skip lead-in data
606         while (1) {
607                 fseek(fi, offset + 4, SEEK_SET);
608                 if (fgetc(fi) < 0xA0) {
609                         break;
610                 }
611                 offset += 0x50;
612         }
613
614         // check if the image contains mixed subchannel data
615         fseek(fi, offset + 1, SEEK_SET);
616         subChanMixed = subChanRaw = (fgetc(fi) ? TRUE : FALSE);
617
618         // read track data
619         for (i = 1; i <= numtracks; i++) {
620                 fseek(fi, offset, SEEK_SET);
621
622                 // get the track type
623                 ti[i].type = ((fgetc(fi) == 0xA9) ? CDDA : DATA);
624                 fseek(fi, 8, SEEK_CUR);
625
626                 // get the track starting point
627                 ti[i].start[0] = fgetc(fi);
628                 ti[i].start[1] = fgetc(fi);
629                 ti[i].start[2] = fgetc(fi);
630
631                 if (fread(&extra_offset, 1, sizeof(extra_offset), fi) != sizeof(extra_offset))
632                         goto fail_io;
633                 extra_offset = SWAP32(extra_offset);
634
635                 // get track start offset (in .mdf)
636                 fseek(fi, offset + 0x28, SEEK_SET);
637                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
638                         goto fail_io;
639                 l = SWAP32(l);
640                 ti[i].start_offset = l;
641
642                 // get pregap
643                 fseek(fi, extra_offset, SEEK_SET);
644                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
645                         goto fail_io;
646                 l = SWAP32(l);
647                 if (l != 0 && i > 1)
648                         pregapOffset = msf2sec(ti[i].start);
649
650                 // get the track length
651                 if (fread(&l, 1, sizeof(l), fi) != sizeof(l))
652                         goto fail_io;
653                 l = SWAP32(l);
654                 sec2msf(l, ti[i].length);
655
656                 offset += 0x50;
657         }
658         fclose(fi);
659         return 0;
660 fail_io:
661 #ifndef NDEBUG
662         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
663 #endif
664         fclose(fi);
665         return -1;
666 }
667
668 static int handlepbp(const char *isofile) {
669         struct {
670                 unsigned int sig;
671                 unsigned int dontcare[8];
672                 unsigned int psar_offs;
673         } pbp_hdr;
674         struct {
675                 unsigned char type;
676                 unsigned char pad0;
677                 unsigned char track;
678                 char index0[3];
679                 char pad1;
680                 char index1[3];
681         } toc_entry;
682         struct {
683                 unsigned int offset;
684                 unsigned int size;
685                 unsigned int dontcare[6];
686         } index_entry;
687         char psar_sig[11];
688         off_t psisoimg_offs, cdimg_base;
689         unsigned int t, cd_length;
690         unsigned int offsettab[8];
691         unsigned int psar_offs, index_entry_size, index_entry_offset;
692         const char *ext = NULL;
693         int i, ret;
694
695         if (strlen(isofile) >= 4)
696                 ext = isofile + strlen(isofile) - 4;
697         if (ext == NULL || (strcmp(ext, ".pbp") != 0 && strcmp(ext, ".PBP") != 0))
698                 return -1;
699
700         fseeko(cdHandle, 0, SEEK_SET);
701
702         numtracks = 0;
703
704         ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), cdHandle);
705         if (ret != sizeof(pbp_hdr)) {
706                 SysPrintf("failed to read pbp\n");
707                 goto fail_io;
708         }
709
710         psar_offs = SWAP32(pbp_hdr.psar_offs);
711
712         ret = fseeko(cdHandle, psar_offs, SEEK_SET);
713         if (ret != 0) {
714                 SysPrintf("failed to seek to %x\n", psar_offs);
715                 goto fail_io;
716         }
717
718         psisoimg_offs = psar_offs;
719         if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
720                 goto fail_io;
721         psar_sig[10] = 0;
722         if (strcmp(psar_sig, "PSTITLEIMG") == 0) {
723                 // multidisk image?
724                 ret = fseeko(cdHandle, psar_offs + 0x200, SEEK_SET);
725                 if (ret != 0) {
726                         SysPrintf("failed to seek to %x\n", psar_offs + 0x200);
727                         goto fail_io;
728                 }
729
730                 if (fread(&offsettab, 1, sizeof(offsettab), cdHandle) != sizeof(offsettab)) {
731                         SysPrintf("failed to read offsettab\n");
732                         goto fail_io;
733                 }
734
735                 for (i = 0; i < sizeof(offsettab) / sizeof(offsettab[0]); i++) {
736                         if (offsettab[i] == 0)
737                                 break;
738                 }
739                 cdrIsoMultidiskCount = i;
740                 if (cdrIsoMultidiskCount == 0) {
741                         SysPrintf("multidisk eboot has 0 images?\n");
742                         goto fail_io;
743                 }
744
745                 if (cdrIsoMultidiskSelect >= cdrIsoMultidiskCount)
746                         cdrIsoMultidiskSelect = 0;
747
748                 psisoimg_offs += SWAP32(offsettab[cdrIsoMultidiskSelect]);
749
750                 ret = fseeko(cdHandle, psisoimg_offs, SEEK_SET);
751                 if (ret != 0) {
752                         SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs);
753                         goto fail_io;
754                 }
755
756                 if (fread(psar_sig, 1, sizeof(psar_sig), cdHandle) != sizeof(psar_sig))
757                         goto fail_io;
758                 psar_sig[10] = 0;
759         }
760
761         if (strcmp(psar_sig, "PSISOIMG00") != 0) {
762                 SysPrintf("bad psar_sig: %s\n", psar_sig);
763                 goto fail_io;
764         }
765
766         // seek to TOC
767         ret = fseeko(cdHandle, psisoimg_offs + 0x800, SEEK_SET);
768         if (ret != 0) {
769                 SysPrintf("failed to seek to %llx\n", (long long)psisoimg_offs + 0x800);
770                 goto fail_io;
771         }
772
773         // first 3 entries are special
774         fseek(cdHandle, sizeof(toc_entry), SEEK_CUR);
775         if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
776                 goto fail_io;
777         numtracks = btoi(toc_entry.index1[0]);
778
779         if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
780                 goto fail_io;
781         cd_length = btoi(toc_entry.index1[0]) * 60 * 75 +
782                 btoi(toc_entry.index1[1]) * 75 + btoi(toc_entry.index1[2]);
783
784         for (i = 1; i <= numtracks; i++) {
785                 if (fread(&toc_entry, 1, sizeof(toc_entry), cdHandle) != sizeof(toc_entry))
786                         goto fail_io;
787
788                 ti[i].type = (toc_entry.type == 1) ? CDDA : DATA;
789
790                 ti[i].start_offset = btoi(toc_entry.index0[0]) * 60 * 75 +
791                         btoi(toc_entry.index0[1]) * 75 + btoi(toc_entry.index0[2]);
792                 ti[i].start_offset *= 2352;
793                 ti[i].start[0] = btoi(toc_entry.index1[0]);
794                 ti[i].start[1] = btoi(toc_entry.index1[1]);
795                 ti[i].start[2] = btoi(toc_entry.index1[2]);
796
797                 if (i > 1) {
798                         t = msf2sec(ti[i].start) - msf2sec(ti[i - 1].start);
799                         sec2msf(t, ti[i - 1].length);
800                 }
801         }
802         t = cd_length - ti[numtracks].start_offset / 2352;
803         sec2msf(t, ti[numtracks].length);
804
805         // seek to ISO index
806         ret = fseeko(cdHandle, psisoimg_offs + 0x4000, SEEK_SET);
807         if (ret != 0) {
808                 SysPrintf("failed to seek to ISO index\n");
809                 goto fail_io;
810         }
811
812         compr_img = calloc(1, sizeof(*compr_img));
813         if (compr_img == NULL)
814                 goto fail_io;
815
816         compr_img->block_shift = 4;
817         compr_img->current_block = (unsigned int)-1;
818
819         compr_img->index_len = (0x100000 - 0x4000) / sizeof(index_entry);
820         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
821         if (compr_img->index_table == NULL)
822                 goto fail_io;
823
824         cdimg_base = psisoimg_offs + 0x100000;
825         for (i = 0; i < compr_img->index_len; i++) {
826                 ret = fread(&index_entry, 1, sizeof(index_entry), cdHandle);
827                 if (ret != sizeof(index_entry)) {
828                         SysPrintf("failed to read index_entry #%d\n", i);
829                         goto fail_index;
830                 }
831
832                 index_entry_size = SWAP32(index_entry.size);
833                 index_entry_offset = SWAP32(index_entry.offset);
834
835                 if (index_entry_size == 0)
836                         break;
837
838                 compr_img->index_table[i] = cdimg_base + index_entry_offset;
839         }
840         compr_img->index_table[i] = cdimg_base + index_entry_offset + index_entry_size;
841
842         return 0;
843
844 fail_index:
845         free(compr_img->index_table);
846         compr_img->index_table = NULL;
847         goto done;
848
849 fail_io:
850 #ifndef NDEBUG
851         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
852 #endif
853
854 done:
855         if (compr_img != NULL) {
856                 free(compr_img);
857                 compr_img = NULL;
858         }
859         return -1;
860 }
861
862 static int handlecbin(const char *isofile) {
863         struct
864         {
865                 char magic[4];
866                 unsigned int header_size;
867                 unsigned long long total_bytes;
868                 unsigned int block_size;
869                 unsigned char ver;              // 1
870                 unsigned char align;
871                 unsigned char rsv_06[2];
872         } ciso_hdr;
873         const char *ext = NULL;
874         unsigned int *index_table = NULL;
875         unsigned int index = 0, plain;
876         int i, ret;
877
878         if (strlen(isofile) >= 5)
879                 ext = isofile + strlen(isofile) - 5;
880         if (ext == NULL || (strcasecmp(ext + 1, ".cbn") != 0 && strcasecmp(ext, ".cbin") != 0))
881                 return -1;
882
883         fseek(cdHandle, 0, SEEK_SET);
884
885         ret = fread(&ciso_hdr, 1, sizeof(ciso_hdr), cdHandle);
886         if (ret != sizeof(ciso_hdr)) {
887                 SysPrintf("failed to read ciso header\n");
888                 return -1;
889         }
890
891         if (strncmp(ciso_hdr.magic, "CISO", 4) != 0 || ciso_hdr.total_bytes <= 0 || ciso_hdr.block_size <= 0) {
892                 SysPrintf("bad ciso header\n");
893                 return -1;
894         }
895         if (ciso_hdr.header_size != 0 && ciso_hdr.header_size != sizeof(ciso_hdr)) {
896                 ret = fseeko(cdHandle, ciso_hdr.header_size, SEEK_SET);
897                 if (ret != 0) {
898                         SysPrintf("failed to seek to %x\n", ciso_hdr.header_size);
899                         return -1;
900                 }
901         }
902
903         compr_img = calloc(1, sizeof(*compr_img));
904         if (compr_img == NULL)
905                 goto fail_io;
906
907         compr_img->block_shift = 0;
908         compr_img->current_block = (unsigned int)-1;
909
910         compr_img->index_len = ciso_hdr.total_bytes / ciso_hdr.block_size;
911         index_table = malloc((compr_img->index_len + 1) * sizeof(index_table[0]));
912         if (index_table == NULL)
913                 goto fail_io;
914
915         ret = fread(index_table, sizeof(index_table[0]), compr_img->index_len, cdHandle);
916         if (ret != compr_img->index_len) {
917                 SysPrintf("failed to read index table\n");
918                 goto fail_index;
919         }
920
921         compr_img->index_table = malloc((compr_img->index_len + 1) * sizeof(compr_img->index_table[0]));
922         if (compr_img->index_table == NULL)
923                 goto fail_index;
924
925         for (i = 0; i < compr_img->index_len + 1; i++) {
926                 index = index_table[i];
927                 plain = index & 0x80000000;
928                 index &= 0x7fffffff;
929                 compr_img->index_table[i] = (off_t)index << ciso_hdr.align;
930                 if (plain)
931                         compr_img->index_table[i] |= OFF_T_MSB;
932         }
933
934         return 0;
935
936 fail_index:
937         free(index_table);
938 fail_io:
939         if (compr_img != NULL) {
940                 free(compr_img);
941                 compr_img = NULL;
942         }
943         return -1;
944 }
945
946 #ifdef HAVE_CHD
947 static int handlechd(const char *isofile) {
948         int frame_offset = 150;
949         int file_offset = 0;
950
951         chd_img = calloc(1, sizeof(*chd_img));
952         if (chd_img == NULL)
953                 goto fail_io;
954
955         if(chd_open(isofile, CHD_OPEN_READ, NULL, &chd_img->chd) != CHDERR_NONE)
956                 goto fail_io;
957
958         if (Config.CHD_Precache && (chd_precache(chd_img->chd) != CHDERR_NONE))
959                 goto fail_io;
960
961         chd_img->header = chd_get_header(chd_img->chd);
962
963         chd_img->buffer = malloc(chd_img->header->hunkbytes * 2);
964         if (chd_img->buffer == NULL)
965                 goto fail_io;
966
967         chd_img->sectors_per_hunk = chd_img->header->hunkbytes / (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
968         chd_img->current_hunk[0] = (unsigned int)-1;
969         chd_img->current_hunk[1] = (unsigned int)-1;
970
971         cddaBigEndian = TRUE;
972
973         numtracks = 0;
974         memset(ti, 0, sizeof(ti));
975
976    while (1)
977    {
978       struct {
979          char type[64];
980          char subtype[32];
981          char pgtype[32];
982          char pgsub[32];
983          uint32_t track;
984          uint32_t frames;
985          uint32_t pregap;
986          uint32_t postgap;
987       } md = {};
988       char meta[256];
989       uint32_t meta_size = 0;
990
991       if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA2_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
992          sscanf(meta, CDROM_TRACK_METADATA2_FORMAT, &md.track, md.type, md.subtype, &md.frames, &md.pregap, md.pgtype, md.pgsub, &md.postgap);
993       else if (chd_get_metadata(chd_img->chd, CDROM_TRACK_METADATA_TAG, numtracks, meta, sizeof(meta), &meta_size, NULL, NULL) == CHDERR_NONE)
994          sscanf(meta, CDROM_TRACK_METADATA_FORMAT, &md.track, md.type, md.subtype, &md.frames);
995       else
996          break;
997
998                 SysPrintf("chd: %s\n", meta);
999
1000                 if (md.track == 1) {
1001                         if (!strncmp(md.subtype, "RW", 2)) {
1002                                 subChanMixed = TRUE;
1003                                 if (!strcmp(md.subtype, "RW_RAW"))
1004                                         subChanRaw = TRUE;
1005                         }
1006                 }
1007
1008                 ti[md.track].type = !strncmp(md.type, "AUDIO", 5) ? CDDA : DATA;
1009
1010                 sec2msf(frame_offset + md.pregap, ti[md.track].start);
1011                 sec2msf(md.frames, ti[md.track].length);
1012
1013                 ti[md.track].start_offset = file_offset + md.pregap;
1014
1015                 // XXX: what about postgap?
1016                 frame_offset += md.frames;
1017                 file_offset += md.frames;
1018                 numtracks++;
1019         }
1020
1021         if (numtracks)
1022                 return 0;
1023
1024 fail_io:
1025         if (chd_img != NULL) {
1026                 free(chd_img->buffer);
1027                 free(chd_img);
1028                 chd_img = NULL;
1029         }
1030         return -1;
1031 }
1032 #endif
1033
1034 // this function tries to get the .sub file of the given .img
1035 static int opensubfile(const char *isoname) {
1036         char            subname[MAXPATHLEN];
1037
1038         // copy name of the iso and change extension from .img to .sub
1039         strncpy(subname, isoname, sizeof(subname));
1040         subname[MAXPATHLEN - 1] = '\0';
1041         if (strlen(subname) >= 4) {
1042                 strcpy(subname + strlen(subname) - 4, ".sub");
1043         }
1044         else {
1045                 return -1;
1046         }
1047
1048         subHandle = fopen(subname, "rb");
1049         if (subHandle == NULL) {
1050                 return -1;
1051         }
1052
1053         return 0;
1054 }
1055
1056 static int opensbifile(const char *isoname) {
1057         char            sbiname[MAXPATHLEN], disknum[MAXPATHLEN] = "0";
1058         int             s;
1059
1060         strncpy(sbiname, isoname, sizeof(sbiname));
1061         sbiname[MAXPATHLEN - 1] = '\0';
1062         if (strlen(sbiname) >= 4) {
1063                 if (cdrIsoMultidiskCount > 1) {
1064                         sprintf(disknum, "_%i.sbi", cdrIsoMultidiskSelect + 1);
1065                         strcpy(sbiname + strlen(sbiname) - 4, disknum);
1066                 }
1067                 else
1068                         strcpy(sbiname + strlen(sbiname) - 4, ".sbi");
1069         }
1070         else {
1071                 return -1;
1072         }
1073
1074         fseek(cdHandle, 0, SEEK_END);
1075         s = ftell(cdHandle) / 2352;
1076
1077         return LoadSBI(sbiname, s);
1078 }
1079
1080 #if !USE_READ_THREAD
1081 static void readThreadStop() {}
1082 static void readThreadStart() {}
1083 #else
1084 static pthread_t read_thread_id;
1085
1086 static pthread_cond_t read_thread_msg_avail;
1087 static pthread_cond_t read_thread_msg_done;
1088 static pthread_mutex_t read_thread_msg_lock;
1089
1090 static pthread_cond_t sectorbuffer_cond;
1091 static pthread_mutex_t sectorbuffer_lock;
1092
1093 static boolean read_thread_running = FALSE;
1094 static int read_thread_sector_start = -1;
1095 static int read_thread_sector_end = -1;
1096
1097 typedef struct {
1098   int sector;
1099   long ret;
1100   unsigned char data[CD_FRAMESIZE_RAW];
1101 } SectorBufferEntry;
1102
1103 #define SECTOR_BUFFER_SIZE 4096
1104
1105 static SectorBufferEntry *sectorbuffer;
1106 static size_t sectorbuffer_index;
1107
1108 int (*sync_cdimg_read_func)(FILE *f, unsigned int base, void *dest, int sector);
1109 unsigned char *(*sync_CDR_getBuffer)(void);
1110
1111 static unsigned char * CALLBACK ISOgetBuffer_async(void);
1112 static int cdread_async(FILE *f, unsigned int base, void *dest, int sector);
1113
1114 static void *readThreadMain(void *param) {
1115   int max_sector = -1;
1116   int requested_sector_start = -1;
1117   int requested_sector_end = -1;
1118   int last_read_sector = -1;
1119   int index = 0;
1120
1121   int ra_sector = -1;
1122   int max_ra = 128;
1123   int initial_ra = 1;
1124   int speedmult_ra = 4;
1125
1126   int ra_count = 0;
1127   int how_far_ahead = 0;
1128
1129   unsigned char tmpdata[CD_FRAMESIZE_RAW];
1130   long ret;
1131
1132   max_sector = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1133
1134   while(1) {
1135     pthread_mutex_lock(&read_thread_msg_lock);
1136
1137     // If we don't have readahead and we don't have a sector request, wait for one.
1138     // If we still have readahead to go, don't block, just keep going.
1139     // And if we ever have a sector request pending, acknowledge and reset it.
1140
1141     if (!ra_count) {
1142       if (read_thread_sector_start == -1 && read_thread_running) {
1143         pthread_cond_wait(&read_thread_msg_avail, &read_thread_msg_lock);
1144       }
1145     }
1146
1147     if (read_thread_sector_start != -1) {
1148       requested_sector_start = read_thread_sector_start;
1149       requested_sector_end = read_thread_sector_end;
1150       read_thread_sector_start = -1;
1151       read_thread_sector_end = -1;
1152       pthread_cond_signal(&read_thread_msg_done);
1153     }
1154
1155     pthread_mutex_unlock(&read_thread_msg_lock);
1156
1157     if (!read_thread_running)
1158       break;
1159
1160     // Readahead code, based on the implementation in mednafen psx's cdromif.cpp
1161     if (requested_sector_start != -1) {
1162       if (last_read_sector != -1 && last_read_sector == (requested_sector_start - 1)) {
1163         how_far_ahead = ra_sector - requested_sector_end;
1164
1165         if(how_far_ahead <= max_ra)
1166           ra_count = (max_ra - how_far_ahead + 1 ? max_ra - how_far_ahead + 1 : speedmult_ra);
1167         else
1168           ra_count++;
1169       } else if (requested_sector_end != last_read_sector) {
1170         ra_sector = requested_sector_end;
1171         ra_count = initial_ra;
1172       }
1173
1174       last_read_sector = requested_sector_end;
1175     }
1176
1177     index = ra_sector % SECTOR_BUFFER_SIZE;
1178
1179     // check for end of CD
1180     if (ra_count && ra_sector >= max_sector) {
1181       ra_count = 0;
1182       pthread_mutex_lock(&sectorbuffer_lock);
1183       sectorbuffer[index].ret = -1;
1184       sectorbuffer[index].sector = ra_sector;
1185       pthread_cond_signal(&sectorbuffer_cond);
1186       pthread_mutex_unlock(&sectorbuffer_lock);
1187     }
1188
1189     if (ra_count) {
1190       pthread_mutex_lock(&sectorbuffer_lock);
1191       if (sectorbuffer[index].sector != ra_sector) {
1192         pthread_mutex_unlock(&sectorbuffer_lock);
1193
1194         ret = sync_cdimg_read_func(cdHandle, 0, tmpdata, ra_sector);
1195
1196         pthread_mutex_lock(&sectorbuffer_lock);
1197         sectorbuffer[index].ret = ret;
1198         sectorbuffer[index].sector = ra_sector;
1199         memcpy(sectorbuffer[index].data, tmpdata, CD_FRAMESIZE_RAW);
1200       }
1201       pthread_cond_signal(&sectorbuffer_cond);
1202       pthread_mutex_unlock(&sectorbuffer_lock);
1203
1204       ra_sector++;
1205       ra_count--;
1206     }
1207   }
1208
1209   return NULL;
1210 }
1211
1212 static void readThreadStop() {
1213   if (read_thread_running == TRUE) {
1214     read_thread_running = FALSE;
1215     pthread_cond_signal(&read_thread_msg_avail);
1216     pthread_join(read_thread_id, NULL);
1217   }
1218
1219   pthread_cond_destroy(&read_thread_msg_done);
1220   pthread_cond_destroy(&read_thread_msg_avail);
1221   pthread_mutex_destroy(&read_thread_msg_lock);
1222
1223   pthread_cond_destroy(&sectorbuffer_cond);
1224   pthread_mutex_destroy(&sectorbuffer_lock);
1225
1226   CDR_getBuffer = sync_CDR_getBuffer;
1227   cdimg_read_func = sync_cdimg_read_func;
1228
1229   free(sectorbuffer);
1230   sectorbuffer = NULL;
1231 }
1232
1233 static void readThreadStart() {
1234   SysPrintf("Starting async CD thread\n");
1235
1236   if (read_thread_running == TRUE)
1237     return;
1238
1239   read_thread_running = TRUE;
1240   read_thread_sector_start = -1;
1241   read_thread_sector_end = -1;
1242   sectorbuffer_index = 0;
1243
1244   sectorbuffer = calloc(SECTOR_BUFFER_SIZE, sizeof(SectorBufferEntry));
1245   if(!sectorbuffer)
1246     goto error;
1247
1248   sectorbuffer[0].sector = -1; // Otherwise we might think we've already fetched sector 0!
1249
1250   sync_CDR_getBuffer = CDR_getBuffer;
1251   CDR_getBuffer = ISOgetBuffer_async;
1252   sync_cdimg_read_func = cdimg_read_func;
1253   cdimg_read_func = cdread_async;
1254
1255   if (pthread_cond_init(&read_thread_msg_avail, NULL) ||
1256       pthread_cond_init(&read_thread_msg_done, NULL) ||
1257       pthread_mutex_init(&read_thread_msg_lock, NULL) ||
1258       pthread_cond_init(&sectorbuffer_cond, NULL) ||
1259       pthread_mutex_init(&sectorbuffer_lock, NULL) ||
1260       pthread_create(&read_thread_id, NULL, readThreadMain, NULL))
1261     goto error;
1262
1263   return;
1264
1265  error:
1266   SysPrintf("Error starting async CD thread\n");
1267   SysPrintf("Falling back to sync\n");
1268
1269   readThreadStop();
1270 }
1271 #endif
1272
1273 static int cdread_normal(FILE *f, unsigned int base, void *dest, int sector)
1274 {
1275         int ret;
1276         if (fseek(f, base + sector * CD_FRAMESIZE_RAW, SEEK_SET))
1277                 goto fail_io;
1278         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1279         if (ret <= 0)
1280                 goto fail_io;
1281         return ret;
1282
1283 fail_io:
1284         // often happens in cdda gaps of a split cue/bin, so not logged
1285         //SysPrintf("File IO error %d, base %u, sector %u\n", errno, base, sector);
1286         return -1;
1287 }
1288
1289 static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
1290 {
1291         int ret;
1292
1293         if (fseek(f, base + sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE), SEEK_SET))
1294                 goto fail_io;
1295         ret = fread(dest, 1, CD_FRAMESIZE_RAW, f);
1296         if (ret <= 0)
1297                 goto fail_io;
1298         return ret;
1299
1300 fail_io:
1301         //SysPrintf("File IO error %d, base %u, sector %u\n", errno, base, sector);
1302         return -1;
1303 }
1304
1305 static int cdread_sub_sub_mixed(FILE *f, int sector)
1306 {
1307         if (fseek(f, sector * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE) + CD_FRAMESIZE_RAW, SEEK_SET))
1308                 goto fail_io;
1309         if (fread(subbuffer, 1, SUB_FRAMESIZE, f) != SUB_FRAMESIZE)
1310                 goto fail_io;
1311
1312         return SUB_FRAMESIZE;
1313
1314 fail_io:
1315         SysPrintf("subchannel: file IO error %d, sector %u\n", errno, sector);
1316         return -1;
1317 }
1318
1319 static int uncompress2_pcsx(void *out, unsigned long *out_size, void *in, unsigned long in_size)
1320 {
1321         static z_stream z;
1322         int ret = 0;
1323
1324         if (z.zalloc == NULL) {
1325                 // XXX: one-time leak here..
1326                 z.next_in = Z_NULL;
1327                 z.avail_in = 0;
1328                 z.zalloc = Z_NULL;
1329                 z.zfree = Z_NULL;
1330                 z.opaque = Z_NULL;
1331                 ret = inflateInit2(&z, -15);
1332         }
1333         else
1334                 ret = inflateReset(&z);
1335         if (ret != Z_OK)
1336                 return ret;
1337
1338         z.next_in = in;
1339         z.avail_in = in_size;
1340         z.next_out = out;
1341         z.avail_out = *out_size;
1342
1343         ret = inflate(&z, Z_NO_FLUSH);
1344         //inflateEnd(&z);
1345
1346         *out_size -= z.avail_out;
1347         return ret == 1 ? 0 : ret;
1348 }
1349
1350 static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
1351 {
1352         unsigned long cdbuffer_size, cdbuffer_size_expect;
1353         unsigned int size;
1354         int is_compressed;
1355         off_t start_byte;
1356         int ret, block;
1357
1358         if (base)
1359                 sector += base / 2352;
1360
1361         block = sector >> compr_img->block_shift;
1362         compr_img->sector_in_blk = sector & ((1 << compr_img->block_shift) - 1);
1363
1364         if (block == compr_img->current_block) {
1365                 //printf("hit sect %d\n", sector);
1366                 goto finish;
1367         }
1368
1369         if (sector >= compr_img->index_len * 16) {
1370                 SysPrintf("sector %d is past img end\n", sector);
1371                 return -1;
1372         }
1373
1374         start_byte = compr_img->index_table[block] & ~OFF_T_MSB;
1375         if (fseeko(cdHandle, start_byte, SEEK_SET) != 0) {
1376                 SysPrintf("seek error for block %d at %llx: ",
1377                         block, (long long)start_byte);
1378                 perror(NULL);
1379                 return -1;
1380         }
1381
1382         is_compressed = !(compr_img->index_table[block] & OFF_T_MSB);
1383         size = (compr_img->index_table[block + 1] & ~OFF_T_MSB) - start_byte;
1384         if (size > sizeof(compr_img->buff_compressed)) {
1385                 SysPrintf("block %d is too large: %u\n", block, size);
1386                 return -1;
1387         }
1388
1389         if (fread(is_compressed ? compr_img->buff_compressed : compr_img->buff_raw[0],
1390                                 1, size, cdHandle) != size) {
1391                 SysPrintf("read error for block %d at %x: ", block, start_byte);
1392                 perror(NULL);
1393                 return -1;
1394         }
1395
1396         if (is_compressed) {
1397                 cdbuffer_size_expect = sizeof(compr_img->buff_raw[0]) << compr_img->block_shift;
1398                 cdbuffer_size = cdbuffer_size_expect;
1399                 ret = uncompress2_pcsx(compr_img->buff_raw[0], &cdbuffer_size, compr_img->buff_compressed, size);
1400                 if (ret != 0) {
1401                         SysPrintf("uncompress failed with %d for block %d, sector %d\n",
1402                                         ret, block, sector);
1403                         return -1;
1404                 }
1405                 if (cdbuffer_size != cdbuffer_size_expect)
1406                         SysPrintf("cdbuffer_size: %lu != %lu, sector %d\n", cdbuffer_size,
1407                                         cdbuffer_size_expect, sector);
1408         }
1409
1410         // done at last!
1411         compr_img->current_block = block;
1412
1413 finish:
1414         if (dest != cdbuffer) // copy avoid HACK
1415                 memcpy(dest, compr_img->buff_raw[compr_img->sector_in_blk],
1416                         CD_FRAMESIZE_RAW);
1417         return CD_FRAMESIZE_RAW;
1418 }
1419
1420 #ifdef HAVE_CHD
1421 static unsigned char *chd_get_sector(unsigned int current_buffer, unsigned int sector_in_hunk)
1422 {
1423         return chd_img->buffer
1424                 + current_buffer * chd_img->header->hunkbytes
1425                 + sector_in_hunk * (CD_FRAMESIZE_RAW + SUB_FRAMESIZE);
1426 }
1427
1428 static int cdread_chd(FILE *f, unsigned int base, void *dest, int sector)
1429 {
1430         int hunk;
1431
1432         sector += base;
1433
1434         hunk = sector / chd_img->sectors_per_hunk;
1435         chd_img->sector_in_hunk = sector % chd_img->sectors_per_hunk;
1436
1437         if (hunk == chd_img->current_hunk[0])
1438                 chd_img->current_buffer = 0;
1439         else if (hunk == chd_img->current_hunk[1])
1440                 chd_img->current_buffer = 1;
1441         else
1442         {
1443                 chd_read(chd_img->chd, hunk, chd_img->buffer +
1444                         chd_img->current_buffer * chd_img->header->hunkbytes);
1445                 chd_img->current_hunk[chd_img->current_buffer] = hunk;
1446         }
1447
1448         if (dest != cdbuffer) // copy avoid HACK
1449                 memcpy(dest, chd_get_sector(chd_img->current_buffer, chd_img->sector_in_hunk),
1450                         CD_FRAMESIZE_RAW);
1451         return CD_FRAMESIZE_RAW;
1452 }
1453
1454 static int cdread_sub_chd(FILE *f, int sector)
1455 {
1456         unsigned int sector_in_hunk;
1457         unsigned int buffer;
1458         int hunk;
1459
1460         if (!subChanMixed)
1461                 return -1;
1462
1463         hunk = sector / chd_img->sectors_per_hunk;
1464         sector_in_hunk = sector % chd_img->sectors_per_hunk;
1465
1466         if (hunk == chd_img->current_hunk[0])
1467                 buffer = 0;
1468         else if (hunk == chd_img->current_hunk[1])
1469                 buffer = 1;
1470         else
1471         {
1472                 buffer = chd_img->current_buffer ^ 1;
1473                 chd_read(chd_img->chd, hunk, chd_img->buffer +
1474                         buffer * chd_img->header->hunkbytes);
1475                 chd_img->current_hunk[buffer] = hunk;
1476         }
1477
1478         memcpy(subbuffer, chd_get_sector(buffer, sector_in_hunk) + CD_FRAMESIZE_RAW, SUB_FRAMESIZE);
1479         return SUB_FRAMESIZE;
1480 }
1481 #endif
1482
1483 static int cdread_2048(FILE *f, unsigned int base, void *dest, int sector)
1484 {
1485         int ret;
1486
1487         fseek(f, base + sector * 2048, SEEK_SET);
1488         ret = fread((char *)dest + 12 * 2, 1, 2048, f);
1489
1490         // not really necessary, fake mode 2 header
1491         memset(cdbuffer, 0, 12 * 2);
1492         sec2msf(sector + 2 * 75, (char *)&cdbuffer[12]);
1493         cdbuffer[12 + 3] = 1;
1494
1495         return 12*2 + ret;
1496 }
1497
1498 #if USE_READ_THREAD
1499
1500 static int cdread_async(FILE *f, unsigned int base, void *dest, int sector) {
1501   boolean found = FALSE;
1502   int i = sector % SECTOR_BUFFER_SIZE;
1503   long ret;
1504
1505   if (f != cdHandle || base != 0 || dest != cdbuffer) {
1506     // Async reads are only supported for cdbuffer, so call the sync
1507     // function directly.
1508     return sync_cdimg_read_func(f, base, dest, sector);
1509   }
1510
1511   pthread_mutex_lock(&read_thread_msg_lock);
1512
1513   // Only wait if we're not trying to read the next sector and
1514   // sector_start is set (meaning the last request hasn't been
1515   // processed yet)
1516   while(read_thread_sector_start != -1 && read_thread_sector_end + 1 != sector) {
1517     pthread_cond_wait(&read_thread_msg_done, &read_thread_msg_lock);
1518   }
1519
1520   if (read_thread_sector_start == -1)
1521     read_thread_sector_start = sector;
1522
1523   read_thread_sector_end = sector;
1524   pthread_cond_signal(&read_thread_msg_avail);
1525   pthread_mutex_unlock(&read_thread_msg_lock);
1526
1527   do {
1528     pthread_mutex_lock(&sectorbuffer_lock);
1529     if (sectorbuffer[i].sector == sector) {
1530       sectorbuffer_index = i;
1531       ret = sectorbuffer[i].ret;
1532       found = TRUE;
1533     }
1534
1535     if (!found) {
1536       pthread_cond_wait(&sectorbuffer_cond, &sectorbuffer_lock);
1537     }
1538     pthread_mutex_unlock(&sectorbuffer_lock);
1539   } while (!found);
1540
1541   return ret;
1542 }
1543
1544 #endif
1545
1546 static unsigned char * CALLBACK ISOgetBuffer_compr(void) {
1547         return compr_img->buff_raw[compr_img->sector_in_blk] + 12;
1548 }
1549
1550 #ifdef HAVE_CHD
1551 static unsigned char * CALLBACK ISOgetBuffer_chd(void) {
1552         return chd_get_sector(chd_img->current_buffer, chd_img->sector_in_hunk) + 12;
1553 }
1554 #endif
1555
1556 #if USE_READ_THREAD
1557 static unsigned char * CALLBACK ISOgetBuffer_async(void) {
1558   unsigned char *buffer;
1559   pthread_mutex_lock(&sectorbuffer_lock);
1560   buffer = sectorbuffer[sectorbuffer_index].data;
1561   pthread_mutex_unlock(&sectorbuffer_lock);
1562   return buffer + 12;
1563 }
1564 #endif
1565
1566 static unsigned char * CALLBACK ISOgetBuffer(void) {
1567         return cdbuffer + 12;
1568 }
1569
1570 static void PrintTracks(void) {
1571         int i;
1572
1573         for (i = 1; i <= numtracks; i++) {
1574                 SysPrintf(_("Track %.2d (%s) - Start %.2d:%.2d:%.2d, Length %.2d:%.2d:%.2d\n"),
1575                         i, (ti[i].type == DATA ? "DATA" : "AUDIO"),
1576                         ti[i].start[0], ti[i].start[1], ti[i].start[2],
1577                         ti[i].length[0], ti[i].length[1], ti[i].length[2]);
1578         }
1579 }
1580
1581 // This function is invoked by the front-end when opening an ISO
1582 // file for playback
1583 static long CALLBACK ISOopen(void) {
1584         boolean isMode1ISO = FALSE;
1585         char alt_bin_filename[MAXPATHLEN];
1586         const char *bin_filename;
1587         char image_str[1024];
1588
1589         if (cdHandle != NULL) {
1590                 return 0; // it's already open
1591         }
1592
1593         cdHandle = fopen(GetIsoFile(), "rb");
1594         if (cdHandle == NULL) {
1595                 SysPrintf(_("Could't open '%s' for reading: %s\n"),
1596                         GetIsoFile(), strerror(errno));
1597                 return -1;
1598         }
1599
1600         snprintf(image_str, sizeof(image_str) - 6*4 - 1,
1601                 "Loaded CD Image: %s", GetIsoFile());
1602
1603         cddaBigEndian = FALSE;
1604         subChanMixed = FALSE;
1605         subChanRaw = FALSE;
1606         pregapOffset = 0;
1607         cdrIsoMultidiskCount = 1;
1608         multifile = 0;
1609
1610         CDR_getBuffer = ISOgetBuffer;
1611         cdimg_read_func = cdread_normal;
1612         cdimg_read_sub_func = NULL;
1613
1614         if (parsetoc(GetIsoFile()) == 0) {
1615                 strcat(image_str, "[+toc]");
1616         }
1617         else if (parseccd(GetIsoFile()) == 0) {
1618                 strcat(image_str, "[+ccd]");
1619         }
1620         else if (parsemds(GetIsoFile()) == 0) {
1621                 strcat(image_str, "[+mds]");
1622         }
1623         else if (parsecue(GetIsoFile()) == 0) {
1624                 strcat(image_str, "[+cue]");
1625         }
1626         if (handlepbp(GetIsoFile()) == 0) {
1627                 strcat(image_str, "[+pbp]");
1628                 CDR_getBuffer = ISOgetBuffer_compr;
1629                 cdimg_read_func = cdread_compressed;
1630         }
1631         else if (handlecbin(GetIsoFile()) == 0) {
1632                 strcat(image_str, "[+cbin]");
1633                 CDR_getBuffer = ISOgetBuffer_compr;
1634                 cdimg_read_func = cdread_compressed;
1635         }
1636 #ifdef HAVE_CHD
1637         else if (handlechd(GetIsoFile()) == 0) {
1638                 strcat(image_str, "[+chd]");
1639                 CDR_getBuffer = ISOgetBuffer_chd;
1640                 cdimg_read_func = cdread_chd;
1641                 cdimg_read_sub_func = cdread_sub_chd;
1642         }
1643 #endif
1644
1645         if (!subChanMixed && opensubfile(GetIsoFile()) == 0) {
1646                 strcat(image_str, "[+sub]");
1647         }
1648         if (opensbifile(GetIsoFile()) == 0) {
1649                 strcat(image_str, "[+sbi]");
1650         }
1651
1652         fseeko(cdHandle, 0, SEEK_END);
1653
1654         // maybe user selected metadata file instead of main .bin ..
1655         bin_filename = GetIsoFile();
1656         if (ftello(cdHandle) < 2352 * 0x10) {
1657                 static const char *exts[] = { ".bin", ".BIN", ".img", ".IMG" };
1658                 FILE *tmpf = NULL;
1659                 size_t i;
1660                 char *p;
1661
1662                 strncpy(alt_bin_filename, bin_filename, sizeof(alt_bin_filename));
1663                 alt_bin_filename[MAXPATHLEN - 1] = '\0';
1664                 if (strlen(alt_bin_filename) >= 4) {
1665                         p = alt_bin_filename + strlen(alt_bin_filename) - 4;
1666                         for (i = 0; i < sizeof(exts) / sizeof(exts[0]); i++) {
1667                                 strcpy(p, exts[i]);
1668                                 tmpf = fopen(alt_bin_filename, "rb");
1669                                 if (tmpf != NULL)
1670                                         break;
1671                         }
1672                 }
1673                 if (tmpf != NULL) {
1674                         bin_filename = alt_bin_filename;
1675                         fclose(cdHandle);
1676                         cdHandle = tmpf;
1677                         fseeko(cdHandle, 0, SEEK_END);
1678                 }
1679         }
1680
1681         // guess whether it is mode1/2048
1682         if (cdimg_read_func == cdread_normal && ftello(cdHandle) % 2048 == 0) {
1683                 unsigned int modeTest = 0;
1684                 fseek(cdHandle, 0, SEEK_SET);
1685                 if (!fread(&modeTest, sizeof(modeTest), 1, cdHandle)) {
1686                         SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__);
1687                 }
1688                 if (SWAP32(modeTest) != 0xffffff00) {
1689                         strcat(image_str, "[2048]");
1690                         isMode1ISO = TRUE;
1691                 }
1692         }
1693         fseek(cdHandle, 0, SEEK_SET);
1694
1695         SysPrintf("%s.\n", image_str);
1696
1697         PrintTracks();
1698
1699         if (subChanMixed && cdimg_read_func == cdread_normal) {
1700                 cdimg_read_func = cdread_sub_mixed;
1701                 cdimg_read_sub_func = cdread_sub_sub_mixed;
1702         }
1703         else if (isMode1ISO) {
1704                 cdimg_read_func = cdread_2048;
1705                 cdimg_read_sub_func = NULL;
1706         }
1707
1708         // make sure we have another handle open for cdda
1709         if (numtracks > 1 && ti[1].handle == NULL) {
1710                 ti[1].handle = fopen(bin_filename, "rb");
1711         }
1712
1713   if (Config.AsyncCD) {
1714     readThreadStart();
1715   }
1716         return 0;
1717 }
1718
1719 static long CALLBACK ISOclose(void) {
1720         int i;
1721
1722         if (cdHandle != NULL) {
1723                 fclose(cdHandle);
1724                 cdHandle = NULL;
1725         }
1726         if (subHandle != NULL) {
1727                 fclose(subHandle);
1728                 subHandle = NULL;
1729         }
1730         playing = FALSE;
1731         cddaHandle = NULL;
1732
1733         if (compr_img != NULL) {
1734                 free(compr_img->index_table);
1735                 free(compr_img);
1736                 compr_img = NULL;
1737         }
1738
1739 #ifdef HAVE_CHD
1740         if (chd_img != NULL) {
1741                 chd_close(chd_img->chd);
1742                 free(chd_img->buffer);
1743                 free(chd_img);
1744                 chd_img = NULL;
1745         }
1746 #endif
1747
1748         for (i = 1; i <= numtracks; i++) {
1749                 if (ti[i].handle != NULL) {
1750                         fclose(ti[i].handle);
1751                         ti[i].handle = NULL;
1752                 }
1753         }
1754         numtracks = 0;
1755         ti[1].type = 0;
1756         UnloadSBI();
1757
1758         memset(cdbuffer, 0, sizeof(cdbuffer));
1759         CDR_getBuffer = ISOgetBuffer;
1760
1761         if (Config.AsyncCD) {
1762                 readThreadStop();
1763         }
1764
1765         return 0;
1766 }
1767
1768 static long CALLBACK ISOinit(void) {
1769         assert(cdHandle == NULL);
1770         assert(subHandle == NULL);
1771
1772         return 0; // do nothing
1773 }
1774
1775 static long CALLBACK ISOshutdown(void) {
1776         ISOclose();
1777         return 0;
1778 }
1779
1780 // return Starting and Ending Track
1781 // buffer:
1782 //  byte 0 - start track
1783 //  byte 1 - end track
1784 static long CALLBACK ISOgetTN(unsigned char *buffer) {
1785         buffer[0] = 1;
1786
1787         if (numtracks > 0) {
1788                 buffer[1] = numtracks;
1789         }
1790         else {
1791                 buffer[1] = 1;
1792         }
1793
1794         return 0;
1795 }
1796
1797 // return Track Time
1798 // buffer:
1799 //  byte 0 - frame
1800 //  byte 1 - second
1801 //  byte 2 - minute
1802 static long CALLBACK ISOgetTD(unsigned char track, unsigned char *buffer) {
1803         if (track == 0) {
1804                 unsigned int sect;
1805                 unsigned char time[3];
1806                 sect = msf2sec(ti[numtracks].start) + msf2sec(ti[numtracks].length);
1807                 sec2msf(sect, (char *)time);
1808                 buffer[2] = time[0];
1809                 buffer[1] = time[1];
1810                 buffer[0] = time[2];
1811         }
1812         else if (numtracks > 0 && track <= numtracks) {
1813                 buffer[2] = ti[track].start[0];
1814                 buffer[1] = ti[track].start[1];
1815                 buffer[0] = ti[track].start[2];
1816         }
1817         else {
1818                 buffer[2] = 0;
1819                 buffer[1] = 2;
1820                 buffer[0] = 0;
1821         }
1822
1823         return 0;
1824 }
1825
1826 // decode 'raw' subchannel data ripped by cdrdao
1827 static void DecodeRawSubData(void) {
1828         unsigned char subQData[12];
1829         int i;
1830
1831         memset(subQData, 0, sizeof(subQData));
1832
1833         for (i = 0; i < 8 * 12; i++) {
1834                 if (subbuffer[i] & (1 << 6)) { // only subchannel Q is needed
1835                         subQData[i >> 3] |= (1 << (7 - (i & 7)));
1836                 }
1837         }
1838
1839         memcpy(&subbuffer[12], subQData, 12);
1840 }
1841
1842 // read track
1843 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
1844 // uses bcd format
1845 static boolean CALLBACK ISOreadTrack(unsigned char *time) {
1846         int sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
1847         long ret;
1848
1849         if (cdHandle == NULL) {
1850                 return 0;
1851         }
1852
1853         if (pregapOffset && sector >= pregapOffset)
1854                 sector -= 2 * 75;
1855
1856         ret = cdimg_read_func(cdHandle, 0, cdbuffer, sector);
1857         if (ret < 12*2 + 2048)
1858                 return 0;
1859
1860         return 1;
1861 }
1862
1863 // plays cdda audio
1864 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
1865 // does NOT uses bcd format
1866 static long CALLBACK ISOplay(unsigned char *time) {
1867         playing = TRUE;
1868         return 0;
1869 }
1870
1871 // stops cdda audio
1872 static long CALLBACK ISOstop(void) {
1873         playing = FALSE;
1874         return 0;
1875 }
1876
1877 // gets subchannel data
1878 static unsigned char* CALLBACK ISOgetBufferSub(int sector) {
1879         if (pregapOffset && sector >= pregapOffset) {
1880                 sector -= 2 * 75;
1881                 if (sector < pregapOffset) // ?
1882                         return NULL;
1883         }
1884
1885         if (cdimg_read_sub_func != NULL) {
1886                 if (cdimg_read_sub_func(cdHandle, sector) != SUB_FRAMESIZE)
1887                         return NULL;
1888         }
1889         else if (subHandle != NULL) {
1890                 if (fseek(subHandle, sector * SUB_FRAMESIZE, SEEK_SET))
1891                         return NULL;
1892                 if (fread(subbuffer, 1, SUB_FRAMESIZE, subHandle) != SUB_FRAMESIZE)
1893                         return NULL;
1894         }
1895         else {
1896                 return NULL;
1897         }
1898
1899         if (subChanRaw) DecodeRawSubData();
1900         return subbuffer;
1901 }
1902
1903 static long CALLBACK ISOgetStatus(struct CdrStat *stat) {
1904         u32 sect;
1905         
1906         CDR__getStatus(stat);
1907         
1908         if (playing) {
1909                 stat->Type = 0x02;
1910                 stat->Status |= 0x80;
1911         }
1912         else {
1913                 // BIOS - boot ID (CD type)
1914                 stat->Type = ti[1].type;
1915         }
1916         
1917         // relative -> absolute time
1918         sect = cddaCurPos;
1919         sec2msf(sect, (char *)stat->Time);
1920         
1921         return 0;
1922 }
1923
1924 // read CDDA sector into buffer
1925 long CALLBACK ISOreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) {
1926         unsigned char msf[3] = {m, s, f};
1927         unsigned int file, track, track_start = 0;
1928         int ret;
1929
1930         cddaCurPos = msf2sec((char *)msf);
1931
1932         // find current track index
1933         for (track = numtracks; ; track--) {
1934                 track_start = msf2sec(ti[track].start);
1935                 if (track_start <= cddaCurPos)
1936                         break;
1937                 if (track == 1)
1938                         break;
1939         }
1940
1941         // data tracks play silent
1942         if (ti[track].type != CDDA) {
1943                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1944                 return 0;
1945         }
1946
1947         file = 1;
1948         if (multifile) {
1949                 // find the file that contains this track
1950                 for (file = track; file > 1; file--)
1951                         if (ti[file].handle != NULL)
1952                                 break;
1953         }
1954
1955         ret = cdimg_read_func(ti[file].handle, ti[track].start_offset,
1956                 buffer, cddaCurPos - track_start);
1957         if (ret != CD_FRAMESIZE_RAW) {
1958                 memset(buffer, 0, CD_FRAMESIZE_RAW);
1959                 return -1;
1960         }
1961
1962         if (cddaBigEndian) {
1963                 int i;
1964                 unsigned char tmp;
1965
1966                 for (i = 0; i < CD_FRAMESIZE_RAW / 2; i++) {
1967                         tmp = buffer[i * 2];
1968                         buffer[i * 2] = buffer[i * 2 + 1];
1969                         buffer[i * 2 + 1] = tmp;
1970                 }
1971         }
1972
1973         return 0;
1974 }
1975
1976 void cdrIsoInit(void) {
1977         CDR_init = ISOinit;
1978         CDR_shutdown = ISOshutdown;
1979         CDR_open = ISOopen;
1980         CDR_close = ISOclose;
1981         CDR_getTN = ISOgetTN;
1982         CDR_getTD = ISOgetTD;
1983         CDR_readTrack = ISOreadTrack;
1984         CDR_getBuffer = ISOgetBuffer;
1985         CDR_play = ISOplay;
1986         CDR_stop = ISOstop;
1987         CDR_getBufferSub = ISOgetBufferSub;
1988         CDR_getStatus = ISOgetStatus;
1989         CDR_readCDDA = ISOreadCDDA;
1990
1991         CDR_getDriveLetter = CDR__getDriveLetter;
1992         CDR_configure = CDR__configure;
1993         CDR_test = CDR__test;
1994         CDR_about = CDR__about;
1995         CDR_setfilename = CDR__setfilename;
1996
1997         numtracks = 0;
1998 }
1999
2000 int cdrIsoActive(void) {
2001         return (cdHandle != NULL);
2002 }