stream/stream_cue.c

   1 //=================== VideoCD BinCue ==========================
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <unistd.h>
  10 #include <fcntl.h>
  11
  12 #include "config.h"
  13 #include "mp_msg.h"
  14 #include "help_mp.h"
  15
  16 #include "stream.h"
  17
  18 #include "help_mp.h"
  19 #include "m_option.h"
  20 #include "m_struct.h"
  21 #include "libavutil/avstring.h"
  22
  23 #define byte    unsigned char
  24 #define SIZERAW 2352
  25 #define SIZEISO_MODE1 2048
  26 #define SIZEISO_MODE2_RAW 2352
  27 #define SIZEISO_MODE2_FORM1 2048
  28 #define SIZEISO_MODE2_FORM2 2336
  29 #define AUDIO 0
  30 #define MODE1 1
  31 #define MODE2 2
  32 #define MODE1_2352 10
  33 #define MODE2_2352 20
  34 #define MODE1_2048 30
  35 #define MODE2_2336 40
  36 #define UNKNOWN -1
  37
  38 static struct stream_priv_s {
  39   char* filename;
  40 } stream_priv_dflts = {
  41   NULL
  42 };
  43
  44 #define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
  45 /// URL definition
  46 static const m_option_t stream_opts_fields[] = {
  47   { "string", ST_OFF(filename), CONF_TYPE_STRING, 0, 0 ,0, NULL},
  48   { NULL, NULL, 0, 0, 0, 0,  NULL }
  49 };
  50 static const struct m_struct_st stream_opts = {
  51   "cue",
  52   sizeof(struct stream_priv_s),
  53   &stream_priv_dflts,
  54   stream_opts_fields
  55 };
  56
  57 static FILE* fd_cue;
  58 static int fd_bin = 0;
  59
  60 static char bin_filename[256];
  61
  62 static char cue_filename[256];
  63 static char bincue_path[256];
  64
  65
  66 typedef struct track
  67 {
  68    unsigned short mode;
  69    unsigned short minute;
  70    unsigned short second;
  71    unsigned short frame;
  72
  73    /* (min*60 + sec) * 75 + fps   */
  74
  75    unsigned long start_sector;
  76
  77    /* = the sizes in bytes off all tracks bevor this one */
  78    /* its needed if there are mode1 tracks befor the mpeg tracks */
  79    unsigned long start_offset;
  80
  81    /*   unsigned char num[3]; */
  82 } tTrack;
  83
  84 /* max 99 tracks on a cd */
  85 static tTrack tracks[100];
  86
  87 static struct cue_track_pos {
  88   int track;
  89   unsigned short mode;
  90   unsigned short minute;
  91   unsigned short second;
  92   unsigned short frame;
  93 } cue_current_pos;
  94
  95 /* number of tracks on the cd */
  96 static int nTracks = 0;
  97
  98 static int digits2int(char s[2], int errval) {
  99   uint8_t a = s[0] - '0';
 100   uint8_t b = s[1] - '0';
 101   if (a > 9 || b > 9)
 102     return errval;
 103   return a * 10 + b;
 104 }
 105
 106 /* presumes Line is preloaded with the "current" line of the file */
 107 static int cue_getTrackinfo(char *Line, tTrack *track)
 108 {
 109   int already_set = 0;
 110
 111   /* Get the 'mode' */
 112   if (strncmp(&Line[2], "TRACK ", 6)==0)
 113   {
 114 /*    strncpy(track->num, &Line[8], 2); track->num[2] = '\0'; */
 115
 116     track->mode = UNKNOWN;
 117     if(strncmp(&Line[11], "AUDIO", 5)==0) track->mode = AUDIO;
 118     if(strncmp(&Line[11], "MODE1/2352", 10)==0) track->mode = MODE1_2352;
 119     if(strncmp(&Line[11], "MODE1/2048", 10)==0) track->mode = MODE1_2048;
 120     if(strncmp(&Line[11], "MODE2/2352", 10)==0) track->mode = MODE2_2352;
 121     if(strncmp(&Line[11], "MODE2/2336", 10)==0) track->mode = MODE2_2336;
 122   }
 123   else return 1;
 124
 125   /* Get the track indexes */
 126   while(1) {
 127     if(! fgets( Line, 256, fd_cue ) ) { break;}
 128
 129     if (strncmp(&Line[2], "TRACK ", 6)==0)
 130     {
 131       /* next track starting */
 132       break;
 133     }
 134
 135     /* Track 0 or 1, take the first an get fill the values*/
 136     if (strncmp(&Line[4], "INDEX ", 6)==0)
 137     {
 138       /* check stuff here so if the answer is false the else stuff below won't be executed */
 139       if ((already_set == 0) && digits2int(Line + 10, 100) <= 1)
 140       {
 141         already_set = 1;
 142
 143         track->minute = digits2int(Line + 13, 0);
 144         track->second = digits2int(Line + 16, 0);
 145         track->frame  = digits2int(Line + 19, 0);
 146       }
 147     }
 148     else if (strncmp(&Line[4], "PREGAP ", 7)==0) { ; /* ignore */ }
 149     else if (strncmp(&Line[4], "FLAGS ", 6)==0)  { ; /* ignore */ }
 150     else mp_msg (MSGT_OPEN,MSGL_INFO,
 151                  MSGTR_MPDEMUX_CUEREAD_UnexpectedCuefileLine, Line);
 152   }
 153   return 0;
 154 }
 155
 156
 157
 158 /* FIXME: the string operations ( strcpy,strcat ) below depend
 159  * on the arrays to have the same size, thus we need to make
 160  * sure the sizes are in sync.
 161  */
 162 static int cue_find_bin (char *firstline) {
 163   int i,j;
 164   char s[256];
 165   char t[256];
 166
 167   /* get the filename out of that */
 168   /*                      12345 6  */
 169   mp_msg (MSGT_OPEN,MSGL_INFO, "[bincue] cue_find_bin(%s)\n", firstline);
 170   if (strncmp(firstline, "FILE \"",6)==0)
 171   {
 172     i = 0;
 173     j = 0;
 174     while ( firstline[6 + i] != '"')
 175     {
 176       bin_filename[j] = firstline[6 + i];
 177
 178       /* if I found a path info, than delete all bevor it */
 179       switch (bin_filename[j])
 180       {
 181         case '\\':
 182           j = 0;
 183           break;
 184
 185         case '/':
 186           j = 0;
 187           break;
 188
 189         default:
 190           j++;
 191       }
 192       i++;
 193     }
 194     bin_filename[j+1] = '\0';
 195
 196   }
 197
 198   /* now try to open that file, without path */
 199   fd_bin = open (bin_filename, O_RDONLY);
 200   if (fd_bin == -1)
 201   {
 202     mp_msg(MSGT_OPEN,MSGL_STATUS, MSGTR_MPDEMUX_CUEREAD_BinFilenameTested,
 203            bin_filename);
 204
 205     /* now try to find it with the path of the cue file */
 206     snprintf(s,sizeof( s ),"%s/%s",bincue_path,bin_filename);
 207     fd_bin = open (s, O_RDONLY);
 208     if (fd_bin == -1)
 209     {
 210       mp_msg(MSGT_OPEN,MSGL_STATUS,
 211              MSGTR_MPDEMUX_CUEREAD_BinFilenameTested, s);
 212       /* now I would say the whole filename is shit, build our own */
 213       strncpy(s, cue_filename, strlen(cue_filename) - 3 );
 214       s[strlen(cue_filename) - 3] = '\0';
 215       strcat(s, "bin");
 216       fd_bin = open (s, O_RDONLY);
 217       if (fd_bin == -1)
 218       {
 219         mp_msg(MSGT_OPEN,MSGL_STATUS,
 220                MSGTR_MPDEMUX_CUEREAD_BinFilenameTested, s);
 221
 222         /* ok try it with path */
 223         snprintf(t, sizeof( t ), "%s/%s", bincue_path, s);
 224         fd_bin = open (t, O_RDONLY);
 225         if (fd_bin == -1)
 226         {
 227           mp_msg(MSGT_OPEN,MSGL_STATUS,
 228                  MSGTR_MPDEMUX_CUEREAD_BinFilenameTested,t);
 229           /* now I would say the whole filename is shit, build our own */
 230           strncpy(s, cue_filename, strlen(cue_filename) - 3 );
 231           s[strlen(cue_filename) - 3] = '\0';
 232           strcat(s, "img");
 233           fd_bin = open (s, O_RDONLY);
 234           if (fd_bin == -1)
 235           {
 236             mp_msg(MSGT_OPEN,MSGL_STATUS,
 237                    MSGTR_MPDEMUX_CUEREAD_BinFilenameTested, s);
 238             /* ok try it with path */
 239             snprintf(t, sizeof( t ), "%s/%s", bincue_path, s);
 240             fd_bin = open (t, O_RDONLY);
 241             if (fd_bin == -1)
 242             {
 243               mp_msg(MSGT_OPEN,MSGL_STATUS,
 244                      MSGTR_MPDEMUX_CUEREAD_BinFilenameTested, s);
 245
 246               /* I'll give up */
 247               mp_msg(MSGT_OPEN,MSGL_ERR,
 248                      MSGTR_MPDEMUX_CUEREAD_CannotFindBinFile);
 249               return -1;
 250             }
 251           }
 252         } else strcpy(bin_filename, t);
 253
 254       } else strcpy(bin_filename, s);
 255
 256     } else strcpy(bin_filename, s);
 257
 258   }
 259
 260   mp_msg(MSGT_OPEN,MSGL_INFO,
 261          MSGTR_MPDEMUX_CUEREAD_UsingBinFile, bin_filename);
 262   return 0;
 263 }
 264
 265 static inline int cue_msf_2_sector(int minute, int second, int frame) {
 266  return frame + (second + minute * 60 ) * 75;
 267 }
 268
 269 static inline int cue_get_msf(void) {
 270   return cue_msf_2_sector (cue_current_pos.minute,
 271                            cue_current_pos.second,
 272                            cue_current_pos.frame);
 273 }
 274
 275 static inline void cue_set_msf(unsigned int sect){
 276   cue_current_pos.frame=sect%75;
 277   sect=sect/75;
 278   cue_current_pos.second=sect%60;
 279   sect=sect/60;
 280   cue_current_pos.minute=sect;
 281 }
 282
 283 static inline int cue_mode_2_sector_size(int mode)
 284 {
 285   switch (mode)
 286   {
 287     case AUDIO:      return AUDIO;
 288     case MODE1_2352: return SIZERAW;
 289     case MODE1_2048: return SIZEISO_MODE1;
 290     case MODE2_2352: return SIZEISO_MODE2_RAW;
 291     case MODE2_2336: return SIZEISO_MODE2_FORM2;
 292
 293     default:
 294       mp_msg(MSGT_OPEN,MSGL_FATAL,
 295              MSGTR_MPDEMUX_CUEREAD_UnknownModeForBinfile);
 296       abort();
 297   }
 298
 299 }
 300
 301
 302 static int cue_read_cue (char *in_cue_filename)
 303 {
 304   struct stat filestat;
 305   char sLine[256];
 306   unsigned int sect;
 307   char *s,*t;
 308   int i;
 309
 310   /* we have no tracks at the beginning */
 311   nTracks = 0;
 312
 313   fd_bin = 0;
 314
 315   /* split the filename into a path and filename part */
 316   s = strdup(in_cue_filename);
 317   t = strrchr(s, '/');
 318   if (t == (char *)NULL)
 319      t = ".";
 320   else {
 321      *t = '\0';
 322      t = s;
 323      if (*t == '\0')
 324        strcpy(t, "/");
 325   }
 326
 327   av_strlcpy(bincue_path,t,sizeof( bincue_path ));
 328   mp_msg(MSGT_OPEN,MSGL_V,"dirname: %s, cuepath: %s\n", t, bincue_path);
 329
 330   /* no path at all? */
 331   if (strcmp(bincue_path, ".") == 0) {
 332     mp_msg(MSGT_OPEN,MSGL_V,"bincue_path: %s\n", bincue_path);
 333     av_strlcpy(cue_filename,in_cue_filename,sizeof( cue_filename ));
 334   } else {
 335     av_strlcpy(cue_filename,in_cue_filename + strlen(bincue_path) + 1,
 336             sizeof( cue_filename ));
 337   }
 338
 339
 340
 341   /* open the cue file */
 342   fd_cue = fopen (in_cue_filename, "r");
 343   if (fd_cue == NULL)
 344   {
 345     mp_msg(MSGT_OPEN,MSGL_ERR,
 346            MSGTR_MPDEMUX_CUEREAD_CannotOpenCueFile, in_cue_filename);
 347     return -1;
 348   }
 349
 350   /* read the first line and hand it to find_bin, which will
 351      test more than one possible name of the file */
 352
 353   if(! fgets( sLine, 256, fd_cue ) )
 354   {
 355     mp_msg(MSGT_OPEN,MSGL_ERR,
 356            MSGTR_MPDEMUX_CUEREAD_ErrReadingFromCueFile, in_cue_filename);
 357     fclose (fd_cue);
 358     return -1;
 359   }
 360
 361   if (cue_find_bin(sLine)) {
 362     fclose (fd_cue);
 363     return -1;
 364   }
 365
 366
 367   /* now build the track list */
 368   /* red the next line and call our track finder */
 369   if(! fgets( sLine, 256, fd_cue ) )
 370   {
 371     mp_msg(MSGT_OPEN,MSGL_ERR,
 372            MSGTR_MPDEMUX_CUEREAD_ErrReadingFromCueFile, in_cue_filename);
 373     fclose (fd_cue);
 374     return -1;
 375   }
 376
 377   while(!feof(fd_cue))
 378   {
 379     if (cue_getTrackinfo(sLine, &tracks[nTracks++]) != 0)
 380     {
 381       mp_msg(MSGT_OPEN,MSGL_ERR,
 382              MSGTR_MPDEMUX_CUEREAD_ErrReadingFromCueFile, in_cue_filename);
 383       fclose (fd_cue);
 384       return -1;
 385     }
 386   }
 387
 388   /* make a fake track with stands for the Lead out */
 389   if (fstat (fd_bin, &filestat) == -1) {
 390     mp_msg(MSGT_OPEN,MSGL_ERR,
 391            MSGTR_MPDEMUX_CUEREAD_ErrGettingBinFileSize);
 392     fclose (fd_cue);
 393     return -1;
 394   }
 395
 396   sect = filestat.st_size / 2352;
 397
 398   tracks[nTracks].frame = sect%75;
 399   sect=sect/75;
 400   tracks[nTracks].second = sect%60;
 401   sect=sect/60;
 402   tracks[nTracks].minute = sect;
 403
 404
 405   /* let's calculate the start sectors and offsets */
 406   for(i = 0; i <= nTracks; i++)
 407   {
 408     tracks[i].start_sector = cue_msf_2_sector(tracks[i].minute,
 409                                               tracks[nTracks].second,
 410                                               tracks[nTracks].frame);
 411
 412     /* if we're the first track we don't need to offset of the one befor */
 413     if (i == 0)
 414     {
 415       /* was always 0 on my svcds, but who knows */
 416       tracks[0].start_offset = tracks[0].start_sector *
 417         cue_mode_2_sector_size(tracks[0].mode);
 418     } else
 419     {
 420       tracks[i].start_offset = tracks[i-1].start_offset +
 421         (tracks[i].start_sector - tracks[i-1].start_sector) *
 422         cue_mode_2_sector_size(tracks[i-1].mode);
 423     }
 424   }
 425
 426   fclose (fd_cue);
 427
 428   return fd_bin;
 429 }
 430
 431
 432
 433
 434 static int cue_read_toc_entry(void) {
 435
 436   int track = cue_current_pos.track - 1;
 437
 438   /* check if its a valid track, if not return -1 */
 439   if (track >= nTracks)
 440     return -1;
 441
 442
 443   switch (tracks[track].mode)
 444   {
 445     case AUDIO:
 446       cue_current_pos.mode = AUDIO;
 447       break;
 448     case MODE1_2352:
 449       cue_current_pos.mode = MODE1;
 450       break;
 451     case MODE1_2048:
 452       cue_current_pos.mode = MODE1;
 453       break;
 454     default: /* MODE2_2352 and MODE2_2336 */
 455       cue_current_pos.mode = MODE2;
 456   }
 457   cue_current_pos.minute = tracks[track].minute;
 458   cue_current_pos.second = tracks[track].second;
 459   cue_current_pos.frame = tracks[track].frame;
 460
 461   return 0;
 462 }
 463
 464 static int cue_vcd_seek_to_track (int track){
 465   cue_current_pos.track  = track;
 466
 467   if (cue_read_toc_entry ())
 468     return -1;
 469
 470   return VCD_SECTOR_DATA * cue_get_msf();
 471 }
 472
 473 static int cue_vcd_get_track_end (int track){
 474   cue_current_pos.frame = tracks[track].frame;
 475   cue_current_pos.second = tracks[track].second;
 476   cue_current_pos.minute = tracks[track].minute;
 477
 478   return VCD_SECTOR_DATA * cue_get_msf();
 479 }
 480
 481 static void cue_vcd_read_toc(void){
 482   int i;
 483   for (i = 0; i < nTracks; ++i) {
 484
 485     mp_msg(MSGT_OPEN,MSGL_INFO,
 486            MSGTR_MPDEMUX_CUEREAD_InfoTrackFormat,
 487            i+1,
 488            tracks[i].mode,
 489            tracks[i].minute,
 490            tracks[i].second,
 491            tracks[i].frame
 492            );
 493   }
 494 }
 495
 496 static int cue_vcd_read(stream_t *stream, char *mem, int size) {
 497   unsigned long position;
 498   int track = cue_current_pos.track - 1;
 499
 500   position = tracks[track].start_offset +
 501              (cue_msf_2_sector(cue_current_pos.minute,
 502                                cue_current_pos.second,
 503                                cue_current_pos.frame) -
 504               tracks[track].start_sector)
 505              * cue_mode_2_sector_size(tracks[track].mode);
 506
 507
 508   if(position >= tracks[track+1].start_offset)
 509     return 0;
 510
 511   if(lseek(fd_bin, position+VCD_SECTOR_OFFS, SEEK_SET) == -1) {
 512     mp_msg(MSGT_OPEN,MSGL_ERR, MSGTR_MPDEMUX_CUEREAD_UnexpectedBinFileEOF);
 513     return 0;
 514   }
 515
 516   if(read(fd_bin, mem, VCD_SECTOR_DATA) != VCD_SECTOR_DATA) {
 517     mp_msg(MSGT_OPEN,MSGL_ERR, MSGTR_MPDEMUX_CUEREAD_CannotReadNBytesOfPayload, VCD_SECTOR_DATA);
 518     return 0;
 519   }
 520
 521   cue_current_pos.frame++;
 522   if (cue_current_pos.frame==75){
 523     cue_current_pos.frame=0;
 524     cue_current_pos.second++;
 525     if (cue_current_pos.second==60){
 526       cue_current_pos.second=0;
 527       cue_current_pos.minute++;
 528     }
 529   }
 530
 531   return VCD_SECTOR_DATA;
 532 }
 533
 534 static int seek(stream_t *s,off_t newpos) {
 535   s->pos=newpos;
 536   cue_set_msf(s->pos/VCD_SECTOR_DATA);
 537   return 1;
 538 }
 539
 540
 541 static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
 542   struct stream_priv_s* p = (struct stream_priv_s*)opts;
 543   int ret,ret2,f,track = 0;
 544   char *filename = NULL, *colon = NULL;
 545
 546   if(mode != STREAM_READ || !p->filename) {
 547     m_struct_free(&stream_opts,opts);
 548     return STREAM_UNSUPPORTED;
 549   }
 550   filename = strdup(p->filename);
 551   if(!filename) {
 552     m_struct_free(&stream_opts,opts);
 553     return STREAM_UNSUPPORTED;
 554   }
 555   colon = strstr(filename, ":");
 556   if(colon) {
 557     if(strlen(colon)>1)
 558       track = atoi(colon+1);
 559     *colon = 0;
 560   }
 561   if(!track)
 562     track = 1;
 563
 564   f = cue_read_cue(filename);
 565   if(f < 0) {
 566     m_struct_free(&stream_opts,opts);
 567     return STREAM_UNSUPPORTED;
 568   }
 569   cue_vcd_read_toc();
 570   ret2=cue_vcd_get_track_end(track);
 571   ret=cue_vcd_seek_to_track(track);
 572   if(ret<0){
 573     mp_msg(MSGT_OPEN,MSGL_ERR,MSGTR_ErrTrackSelect " (seek)\n");
 574     return STREAM_UNSUPPORTED;
 575   }
 576   mp_msg(MSGT_OPEN,MSGL_INFO,MSGTR_MPDEMUX_CUEREAD_CueStreamInfo_FilenameTrackTracksavail, filename, track, ret, ret2);
 577
 578   stream->fd = f;
 579   stream->type = STREAMTYPE_VCDBINCUE;
 580   stream->sector_size = VCD_SECTOR_DATA;
 581   stream->flags = STREAM_READ | STREAM_SEEK_FW;
 582   stream->start_pos = ret;
 583   stream->end_pos = ret2;
 584   stream->fill_buffer = cue_vcd_read;
 585   stream->seek = seek;
 586
 587   free(filename);
 588   m_struct_free(&stream_opts,opts);
 589   return STREAM_OK;
 590 }
 591
 592 const stream_info_t stream_info_cue = {
 593   "CUE track",
 594   "cue",
 595   "Albeu",
 596   "based on the code from ???",
 597   open_s,
 598   { "cue", NULL },
 599   &stream_opts,
 600   1 // Urls are an option string
 601 };
 602