aboutsummaryrefslogtreecommitdiffhomepage
path: root/libmpdemux/cue_read.c
blob: 11e4213b020fbdb79c189104e87866d9e6a86648 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
//=================== VideoCD BinCue ==========================

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>

#include "config.h"
#include "mp_msg.h"
//#include "help_mp.h"

#include "stream.h"

#include "cue_read.h"

#define byte    unsigned char
#define SIZERAW 2352
#define SIZEISO_MODE1 2048
#define SIZEISO_MODE2_RAW 2352
#define SIZEISO_MODE2_FORM1 2048
#define SIZEISO_MODE2_FORM2 2336
#define AUDIO 0
#define MODE1 1
#define MODE2 2
#define MODE1_2352 10
#define MODE2_2352 20
#define MODE1_2048 30
#define MODE2_2336 40
#define UNKNOWN -1

static FILE* fd_cue;
static int fd_bin = 0;

static char bin_filename[256];

static char cue_filename[256];
static char bincue_path[256];


typedef struct track
{
   unsigned short mode;
   unsigned short minute;
   unsigned short second;
   unsigned short frame;

   /* (min*60 + sec) * 75 + fps   */

   unsigned long start_sector;

   /* = the sizes in bytes off all tracks bevor this one */
   /* its needed if there are mode1 tracks befor the mpeg tracks */
   unsigned long start_offset;

   /*   unsigned char num[3]; */
} tTrack;

/* max 99 tracks on a cd */
static tTrack tracks[100];

static struct cue_track_pos {
  int track;
  unsigned short mode;
  unsigned short minute;
  unsigned short second;
  unsigned short frame;
} cue_current_pos;

/* number of tracks on the cd */
static int nTracks = 0;

/* presumes Line is preloaded with the "current" line of the file */
int cue_getTrackinfo(char *Line, tTrack *track)
{
  char inum[3];
  char min;
  char sec;
  char fps;
  int already_set = 0;

  /* Get the 'mode' */
  if (strncmp(&Line[2], "TRACK ", 6)==0)
  {
/*    strncpy(track->num, &Line[8], 2); track->num[2] = '\0'; */

    track->mode = UNKNOWN;
    if(strncmp(&Line[11], "AUDIO", 5)==0) track->mode = AUDIO;
    if(strncmp(&Line[11], "MODE1/2352", 10)==0) track->mode = MODE1_2352;
    if(strncmp(&Line[11], "MODE1/2048", 10)==0) track->mode = MODE1_2048;
    if(strncmp(&Line[11], "MODE2/2352", 10)==0) track->mode = MODE2_2352;
    if(strncmp(&Line[11], "MODE2/2336", 10)==0) track->mode = MODE2_2336;
  }
  else return(1);

  /* Get the track indexes */
  while(1) {
    if(! fgets( Line, 256, fd_cue ) ) { break;}

    if (strncmp(&Line[2], "TRACK ", 6)==0)
    {
      /* next track starting */
      break;
    }

    /* Track 0 or 1, take the first an get fill the values*/
    if (strncmp(&Line[4], "INDEX ", 6)==0)
    {
      /* check stuff here so if the answer is false the else stuff below won't be executed */
      strncpy(inum, &Line[10], 2); inum[2] = '\0';
      if ((already_set == 0) &&
          ((strcmp(inum, "00")==0) || (strcmp(inum, "01")==0)))
      {
        already_set = 1;

        min = ((Line[13]-'0')<<4) | (Line[14]-'0');
        sec = ((Line[16]-'0')<<4) | (Line[17]-'0');
        fps = ((Line[19]-'0')<<4) | (Line[20]-'0');

        track->minute = (((min>>4)*10) + (min&0xf));
        track->second = (((sec>>4)*10) + (sec&0xf));
        track->frame  = (((fps>>4)*10) + (fps&0xf));
      }
    }
    else if (strncmp(&Line[4], "PREGAP ", 7)==0) { ; /* ignore */ }
    else if (strncmp(&Line[4], "FLAGS ", 6)==0)  { ; /* ignore */ }
    else mp_msg (MSGT_OPEN,MSGL_INFO,
                 "[bincue] Unexpected cuefile line: %s\n", Line);
  }
  return(0);
}



/* FIXME: the string operations ( strcpy,strcat ) below depend
 * on the arrays to have the same size, thus we need to make
 * sure the sizes are in sync.
 */
int cue_find_bin (char *firstline) {
  int i,j;
  char s[256];
  char t[256];

  /* get the filename out of that */
  /*                      12345 6  */
  if (strncmp(firstline, "FILE \"",6)==0)
  {
    i = 0;
    j = 0;
    while ( firstline[6 + i] != '"')
    {
      bin_filename[j] = firstline[6 + i];

      /* if I found a path info, than delete all bevor it */
      switch (bin_filename[j])
      {
        case '\\':
          j = 0;
          break;

        case '/':
          j = 0;
          break;

        default:
          j++;
      }
      i++;
    }
    bin_filename[j+1] = '\0';

  }

  /* now try to open that file, without path */
  fd_bin = open (bin_filename, O_RDONLY);
  if (fd_bin == -1)
  {
    mp_msg(MSGT_OPEN,MSGL_STATUS, "[bincue] bin filename tested: %s\n",
           bin_filename);

    /* now try to find it with the path of the cue file */
    snprintf(s,sizeof( s ),"%s/%s",bincue_path,bin_filename);
    fd_bin = open (s, O_RDONLY);
    if (fd_bin == -1)
    {
      mp_msg(MSGT_OPEN,MSGL_STATUS,
             "[bincue] bin filename tested: %s\n", s);
      /* now I would say the whole filename is shit, build our own */
      strncpy(s, cue_filename, strlen(cue_filename) - 3 );
      s[strlen(cue_filename) - 3] = '\0';
      strcat(s, "bin");
      fd_bin = open (s, O_RDONLY);
      if (fd_bin == -1)
      {
        mp_msg(MSGT_OPEN,MSGL_STATUS,
               "[bincue] bin filename tested: %s\n", s);

        /* ok try it with path */
        snprintf(t, sizeof( t ), "%s/%s", bincue_path, s);
        fd_bin = open (t, O_RDONLY);
        if (fd_bin == -1)
        {
          mp_msg(MSGT_OPEN,MSGL_STATUS,
                 "[bincue] bin filename tested: %s\n",t);
          /* now I would say the whole filename is shit, build our own */
          strncpy(s, cue_filename, strlen(cue_filename) - 3 );
          s[strlen(cue_filename) - 3] = '\0';
          strcat(s, "img");
          fd_bin = open (s, O_RDONLY);
          if (fd_bin == -1)
          {
            mp_msg(MSGT_OPEN,MSGL_STATUS,
                   "[bincue] bin filename tested: %s \n", s);
            /* ok try it with path */
            snprintf(t, sizeof( t ), "%s/%s", bincue_path, s);
            fd_bin = open (t, O_RDONLY);
            if (fd_bin == -1)
            {
              mp_msg(MSGT_OPEN,MSGL_STATUS,
                     "[bincue] bin filename tested: %s\n", s);

              /* I'll give up */
              mp_msg(MSGT_OPEN,MSGL_ERR,
                     "[bincue] couldn't find the bin file - giving up\n");
              return -1;
            }
          }
        } else strcpy(bin_filename, t);

      } else strcpy(bin_filename, s);

    } else strcpy(bin_filename, s);

  }

  mp_msg(MSGT_OPEN,MSGL_INFO,
         "[bincue] using bin file %s\n", bin_filename);
  return 0;
}

static inline int cue_msf_2_sector(int minute, int second, int frame) {
 return frame + (second + minute * 60 ) * 75;
}

static inline int cue_get_msf() {
  return cue_msf_2_sector (cue_current_pos.minute,
                           cue_current_pos.second,
                           cue_current_pos.frame);
}

inline void cue_set_msf(unsigned int sect){
  cue_current_pos.frame=sect%75;
  sect=sect/75;
  cue_current_pos.second=sect%60;
  sect=sect/60;
  cue_current_pos.minute=sect;
}

static inline int cue_mode_2_sector_size(int mode)
{
  switch (mode)
  {
    case AUDIO:      return AUDIO;
    case MODE1_2352: return SIZERAW;
    case MODE1_2048: return SIZEISO_MODE1;
    case MODE2_2352: return SIZEISO_MODE2_RAW;
    case MODE2_2336: return SIZEISO_MODE2_FORM2;

    default:
      mp_msg(MSGT_OPEN,MSGL_FATAL,
             "[bincue] unknown mode for binfile. should not happen. aborting\n");
      abort();
  }

}


int cue_read_cue (char *in_cue_filename)
{
  struct stat filestat;
  char sLine[256];
  unsigned int sect;
  char *s,*t;
  int i;

  /* we have no tracks at the beginning */
  nTracks = 0;

  fd_bin = 0;

  /* split the filename into a path and filename part */
  s = strdup(in_cue_filename);
  t = strrchr(s, '/');
  if (t == (char *)NULL)
     t = ".";
  else {
     *t = '\0';
     t = s;
     if (*t == '\0')
       strcpy(t, "/");
  }
  printf ("dirname: %s\n", t);
  strlcpy(bincue_path,t,sizeof( bincue_path ));


  /* no path at all? */
  if (strcmp(bincue_path, ".") == 0) {
    printf ("bincue_path: %s\n", bincue_path);
    strlcpy(cue_filename,in_cue_filename,sizeof( cue_filename ));
  } else {
    strlcpy(cue_filename,in_cue_filename + strlen(bincue_path) + 1,
            sizeof( cue_filename ));
  }



  /* open the cue file */
  fd_cue = fopen (in_cue_filename, "r");
  if (fd_cue == NULL)
  {
    mp_msg(MSGT_OPEN,MSGL_ERR,
           "[bincue] cannot open %s\n", in_cue_filename);
    return -1;
  }

  /* read the first line and hand it to find_bin, which will
     test more than one possible name of the file */

  if(! fgets( sLine, 256, fd_cue ) )
  {
    mp_msg(MSGT_OPEN,MSGL_ERR,
           "[bincue] error reading from  %s\n", in_cue_filename);
    fclose (fd_cue);
    return -1;
  }

  if (cue_find_bin(sLine)) {
    fclose (fd_cue);
    return -1;
  }


  /* now build the track list */
  /* red the next line and call our track finder */
  if(! fgets( sLine, 256, fd_cue ) )
  {
    mp_msg(MSGT_OPEN,MSGL_ERR,
           "[bincue] error reading from  %s\n", in_cue_filename);
    fclose (fd_cue);
    return -1;
  }

  while(!feof(fd_cue))
  {
    if (cue_getTrackinfo(sLine, &tracks[nTracks++]) != 0)
    {
      mp_msg(MSGT_OPEN,MSGL_ERR,
             "[bincue] error reading from  %s\n", in_cue_filename);
      fclose (fd_cue);
      return -1;
    }
  }

  /* make a fake track with stands for the Lead out */
  if (fstat (fd_bin, &filestat) == -1) {
    mp_msg(MSGT_OPEN,MSGL_ERR,
           "[bincue] error getting size of bin file\n");
    fclose (fd_cue);
    return -1;
  }

  sect = filestat.st_size / 2352;

  tracks[nTracks].frame = sect%75;
  sect=sect/75;
  tracks[nTracks].second = sect%60;
  sect=sect/60;
  tracks[nTracks].minute = sect;


  /* let's calculate the start sectors and offsets */
  for(i = 0; i <= nTracks; i++)
  {
    tracks[i].start_sector = cue_msf_2_sector(tracks[i].minute,
                                              tracks[nTracks].second,
                                              tracks[nTracks].frame);

    /* if we're the first track we don't need to offset of the one befor */
    if (i == 0)
    {
      /* was always 0 on my svcds, but who knows */
      tracks[0].start_offset = tracks[0].start_sector *
        cue_mode_2_sector_size(tracks[0].mode);
    } else
    {
      tracks[i].start_offset = tracks[i-1].start_offset +
        (tracks[i].start_sector - tracks[i-1].start_sector) *
        cue_mode_2_sector_size(tracks[i-1].mode);
    }
  }

  fclose (fd_cue);

  return fd_bin;
}




int cue_read_toc_entry() {

  int track = cue_current_pos.track - 1;

  /* check if its a valid track, if not return -1 */
  if (track >= nTracks)
    return -1;


  switch (tracks[track].mode)
  {
    case AUDIO:
      cue_current_pos.mode = AUDIO;
      break;
    case MODE1_2352:
      cue_current_pos.mode = MODE1;
      break;
    case MODE1_2048:
      cue_current_pos.mode = MODE1;
      break;
    default: /* MODE2_2352 and MODE2_2336 */
      cue_current_pos.mode = MODE2;
  }
  cue_current_pos.minute = tracks[track].minute;
  cue_current_pos.second = tracks[track].second;
  cue_current_pos.frame = tracks[track].frame;

  return 0;
}

int cue_read_raw(char *buf) {
  int position;
  int track = cue_current_pos.track - 1;

  /* get the mode of the bin file part and calc the positon */
  position = tracks[track].start_offset +
             (cue_msf_2_sector(cue_current_pos.minute,
                               cue_current_pos.second,
                               cue_current_pos.frame) -
              tracks[track].start_sector)
             * cue_mode_2_sector_size(tracks[track].mode);

  /* check if the track is at its end*/
  if (position >= tracks[track+1].start_offset)
    return -1;

  if (lseek (fd_bin, position, SEEK_SET) == -1) {
    mp_msg(MSGT_OPEN,MSGL_ERR,
           "[bincue] unexpected end of bin file\n");
    return -1;
  }

  if (!read (fd_bin, buf, VCD_SECTOR_SIZE))
    return -1;
  else
    return VCD_SECTOR_DATA;
}



int cue_vcd_seek_to_track (int track){
  cue_current_pos.track  = track;

  if (cue_read_toc_entry ())
    return -1;

  return VCD_SECTOR_DATA * cue_get_msf();
}

int cue_vcd_get_track_end (int track){
  cue_current_pos.frame = tracks[track].frame;
  cue_current_pos.second = tracks[track].second;
  cue_current_pos.minute = tracks[track].minute;

  return VCD_SECTOR_DATA * cue_get_msf();
}

void cue_vcd_read_toc(){
  int i;
  for (i = 0; i < nTracks; ++i) {

    mp_msg(MSGT_OPEN,MSGL_INFO,
           "track %02d:  format=%d  %02d:%02d:%02d\n",
           i,
           tracks[i].mode,
           tracks[i].minute,
           tracks[i].second,
           tracks[i].frame
           );
  }
}


static char vcd_buf[VCD_SECTOR_SIZE];

int cue_vcd_read(char *mem){

  if (cue_read_raw(vcd_buf)==-1) return 0; // EOF?

  memcpy(mem,&vcd_buf[VCD_SECTOR_OFFS],VCD_SECTOR_DATA);

  cue_current_pos.frame++;
  if (cue_current_pos.frame==75){
    cue_current_pos.frame=0;
    cue_current_pos.second++;
    if (cue_current_pos.second==60){
      cue_current_pos.second=0;
      cue_current_pos.minute++;
    }
  }

  return VCD_SECTOR_DATA;
}