libhb/dvdnav.c

   1 /* $Id: dvd.c,v 1.12 2005/11/25 15:05:25 titer Exp $
   2
   3    This file is part of the HandBrake source code.
   4    Homepage: <http://handbrake.fr/>.
   5    It may be used under the terms of the GNU General Public License. */
   6
   7 #include "hb.h"
   8 #include "lang.h"
   9 #include "dvd.h"
  10
  11 #include "dvdnav/dvdnav.h"
  12 #include "dvdread/ifo_read.h"
  13 #include "dvdread/nav_read.h"
  14
  15 #define DVD_READ_CACHE 1
  16
  17 static char        * hb_dvdnav_name( char * path );
  18 static hb_dvd_t    * hb_dvdnav_init( char * path );
  19 static int           hb_dvdnav_title_count( hb_dvd_t * d );
  20 static hb_title_t  * hb_dvdnav_title_scan( hb_dvd_t * d, int t );
  21 static int           hb_dvdnav_start( hb_dvd_t * d, hb_title_t *title, int chapter );
  22 static void          hb_dvdnav_stop( hb_dvd_t * d );
  23 static int           hb_dvdnav_seek( hb_dvd_t * d, float f );
  24 static int           hb_dvdnav_read( hb_dvd_t * d, hb_buffer_t * b );
  25 static int           hb_dvdnav_chapter( hb_dvd_t * d );
  26 static void          hb_dvdnav_close( hb_dvd_t ** _d );
  27 static int           hb_dvdnav_angle_count( hb_dvd_t * d );
  28 static void          hb_dvdnav_set_angle( hb_dvd_t * e, int angle );
  29
  30 hb_dvd_func_t hb_dvdnav_func =
  31 {
  32     hb_dvdnav_init,
  33     hb_dvdnav_close,
  34     hb_dvdnav_name,
  35     hb_dvdnav_title_count,
  36     hb_dvdnav_title_scan,
  37     hb_dvdnav_start,
  38     hb_dvdnav_stop,
  39     hb_dvdnav_seek,
  40     hb_dvdnav_read,
  41     hb_dvdnav_chapter,
  42     hb_dvdnav_angle_count,
  43     hb_dvdnav_set_angle
  44 };
  45
  46 // there can be at most 999 PGCs per title. round that up to the nearest
  47 // power of two.
  48 #define MAX_PGCN 1024
  49
  50 /***********************************************************************
  51  * Local prototypes
  52  **********************************************************************/
  53 static void PgcWalkInit( uint32_t pgcn_map[MAX_PGCN/32] );
  54 static int FindChapterIndex( hb_list_t * list, int pgcn, int pgn );
  55 static int NextPgcn( ifo_handle_t *ifo, int pgcn, uint32_t pgcn_map[MAX_PGCN/32] );
  56 static int FindNextCell( pgc_t *pgc, int cell_cur );
  57 static int dvdtime2msec( dvd_time_t * );
  58
  59 hb_dvd_func_t * hb_dvdnav_methods( void )
  60 {
  61     return &hb_dvdnav_func;
  62 }
  63
  64 static char * hb_dvdnav_name( char * path )
  65 {
  66     static char name[1024];
  67     unsigned char unused[1024];
  68     dvd_reader_t * reader;
  69
  70     reader = DVDOpen( path );
  71     if( !reader )
  72     {
  73         return NULL;
  74     }
  75
  76     if( DVDUDFVolumeInfo( reader, name, sizeof( name ),
  77                           unused, sizeof( unused ) ) )
  78     {
  79         DVDClose( reader );
  80         return NULL;
  81     }
  82
  83     DVDClose( reader );
  84     return name;
  85 }
  86
  87 /***********************************************************************
  88  * hb_dvdnav_reset
  89  ***********************************************************************
  90  * Once dvdnav has entered the 'stopped' state, it can not be revived
  91  * dvdnav_reset doesn't work because it doesn't remember the path
  92  * So this function re-opens dvdnav
  93  **********************************************************************/
  94 static int hb_dvdnav_reset( hb_dvdnav_t * d )
  95 {
  96     if ( d->dvdnav )
  97         dvdnav_close( d->dvdnav );
  98
  99     /* Open device */
 100     if( dvdnav_open(&d->dvdnav, d->path) != DVDNAV_STATUS_OK )
 101     {
 102         /*
 103          * Not an error, may be a stream - which we'll try in a moment.
 104          */
 105         hb_log( "dvd: not a dvd - trying as a stream/file instead" );
 106         goto fail;
 107     }
 108
 109     if (dvdnav_set_readahead_flag(d->dvdnav, DVD_READ_CACHE) !=
 110         DVDNAV_STATUS_OK)
 111     {
 112         hb_error("Error: dvdnav_set_readahead_flag: %s\n",
 113                  dvdnav_err_to_string(d->dvdnav));
 114         goto fail;
 115     }
 116
 117     /*
 118      ** set the PGC positioning flag to have position information
 119      ** relatively to the whole feature instead of just relatively to the
 120      ** current chapter
 121      **/
 122     if (dvdnav_set_PGC_positioning_flag(d->dvdnav, 1) != DVDNAV_STATUS_OK)
 123     {
 124         hb_error("Error: dvdnav_set_PGC_positioning_flag: %s\n",
 125                  dvdnav_err_to_string(d->dvdnav));
 126         goto fail;
 127     }
 128     return 1;
 129
 130 fail:
 131     if( d->dvdnav ) dvdnav_close( d->dvdnav );
 132     return 0;
 133 }
 134
 135 /***********************************************************************
 136  * hb_dvdnav_init
 137  ***********************************************************************
 138  *
 139  **********************************************************************/
 140 static hb_dvd_t * hb_dvdnav_init( char * path )
 141 {
 142     hb_dvd_t * e;
 143     hb_dvdnav_t * d;
 144
 145     e = calloc( sizeof( hb_dvd_t ), 1 );
 146     d = &(e->dvdnav);
 147
 148     /* Open device */
 149     if( dvdnav_open(&d->dvdnav, path) != DVDNAV_STATUS_OK )
 150     {
 151         /*
 152          * Not an error, may be a stream - which we'll try in a moment.
 153          */
 154         hb_log( "dvd: not a dvd - trying as a stream/file instead" );
 155         goto fail;
 156     }
 157
 158     if (dvdnav_set_readahead_flag(d->dvdnav, DVD_READ_CACHE) !=
 159         DVDNAV_STATUS_OK)
 160     {
 161         hb_error("Error: dvdnav_set_readahead_flag: %s\n",
 162                  dvdnav_err_to_string(d->dvdnav));
 163         goto fail;
 164     }
 165
 166     /*
 167      ** set the PGC positioning flag to have position information
 168      ** relatively to the whole feature instead of just relatively to the
 169      ** current chapter
 170      **/
 171     if (dvdnav_set_PGC_positioning_flag(d->dvdnav, 1) != DVDNAV_STATUS_OK)
 172     {
 173         hb_error("Error: dvdnav_set_PGC_positioning_flag: %s\n",
 174                  dvdnav_err_to_string(d->dvdnav));
 175         goto fail;
 176     }
 177
 178     /* Open device */
 179     if( !( d->reader = DVDOpen( path ) ) )
 180     {
 181         /*
 182          * Not an error, may be a stream - which we'll try in a moment.
 183          */
 184         hb_log( "dvd: not a dvd - trying as a stream/file instead" );
 185         goto fail;
 186     }
 187
 188     /* Open main IFO */
 189     if( !( d->vmg = ifoOpen( d->reader, 0 ) ) )
 190     {
 191         hb_error( "dvd: ifoOpen failed" );
 192         goto fail;
 193     }
 194
 195     d->path = strdup( path );
 196
 197     return e;
 198
 199 fail:
 200     if( d->dvdnav ) dvdnav_close( d->dvdnav );
 201     if( d->vmg )    ifoClose( d->vmg );
 202     if( d->reader ) DVDClose( d->reader );
 203     free( e );
 204     return NULL;
 205 }
 206
 207 /***********************************************************************
 208  * hb_dvdnav_title_count
 209  **********************************************************************/
 210 static int hb_dvdnav_title_count( hb_dvd_t * e )
 211 {
 212     int titles = 0;
 213     hb_dvdnav_t * d = &(e->dvdnav);
 214
 215     dvdnav_get_number_of_titles(d->dvdnav, &titles);
 216     return titles;
 217 }
 218
 219 static uint64_t
 220 PttDuration(ifo_handle_t *ifo, int ttn, int pttn, int *blocks, int *last_pgcn)
 221 {
 222     int            pgcn, pgn;
 223     pgc_t        * pgc;
 224     uint64_t       duration = 0;
 225     int            cell_start, cell_end;
 226     int            i;
 227
 228     // Initialize map of visited pgc's to prevent loops
 229     uint32_t pgcn_map[MAX_PGCN/32];
 230     PgcWalkInit( pgcn_map );
 231     pgcn   = ifo->vts_ptt_srpt->title[ttn-1].ptt[pttn-1].pgcn;
 232     pgn   = ifo->vts_ptt_srpt->title[ttn-1].ptt[pttn-1].pgn;
 233     if ( pgcn < 1 || pgcn > ifo->vts_pgcit->nr_of_pgci_srp || pgcn >= MAX_PGCN)
 234     {
 235         hb_error( "invalid PGC ID %d, skipping", pgcn );
 236         return 0;
 237     }
 238
 239     if( pgn <= 0 || pgn > 99 )
 240     {
 241         hb_error( "scan: pgn %d not valid, skipping", pgn );
 242         return 0;
 243     }
 244
 245     *blocks = 0;
 246     do
 247     {
 248         pgc = ifo->vts_pgcit->pgci_srp[pgcn-1].pgc;
 249         if (!pgc)
 250         {
 251             hb_error( "scan: pgc not valid, skipping" );
 252             break;
 253         }
 254         duration += 90LL * dvdtime2msec( &pgc->playback_time );
 255
 256         cell_start = pgc->program_map[pgn-1] - 1;
 257         cell_end = pgc->nr_of_cells - 1;
 258         for(i = cell_start; i <= cell_end; i = FindNextCell(pgc, i))
 259         {
 260             *blocks += pgc->cell_playback[i].last_sector + 1 -
 261                 pgc->cell_playback[i].first_sector;
 262         }
 263         *last_pgcn = pgcn;
 264         pgn = 1;
 265     } while((pgcn = NextPgcn(ifo, pgcn, pgcn_map)) != 0);
 266     return duration;
 267 }
 268
 269 /***********************************************************************
 270  * hb_dvdnav_title_scan
 271  **********************************************************************/
 272 static hb_title_t * hb_dvdnav_title_scan( hb_dvd_t * e, int t )
 273 {
 274
 275     hb_dvdnav_t * d = &(e->dvdnav);
 276     hb_title_t   * title;
 277     ifo_handle_t * ifo = NULL;
 278     int            pgcn, pgn, pgcn_end, i, c;
 279     int            title_pgcn;
 280     pgc_t        * pgc;
 281     int            cell_cur;
 282     hb_chapter_t * chapter;
 283     int            count;
 284     uint64_t       duration, longest;
 285     int            longest_pgcn, longest_pgn, longest_pgcn_end;
 286     float          duration_correction;
 287     const char   * name;
 288
 289     hb_log( "scan: scanning title %d", t );
 290
 291     title = hb_title_init( d->path, t );
 292     if (dvdnav_get_title_string(d->dvdnav, &name) == DVDNAV_STATUS_OK)
 293     {
 294         strncpy( title->name, name, sizeof( title->name ) );
 295     }
 296     else
 297     {
 298         char * p_cur, * p_last = d->path;
 299         for( p_cur = d->path; *p_cur; p_cur++ )
 300         {
 301             if( p_cur[0] == '/' && p_cur[1] )
 302             {
 303                 p_last = &p_cur[1];
 304             }
 305         }
 306         snprintf( title->name, sizeof( title->name ), "%s", p_last );
 307     }
 308
 309     /* VTS which our title is in */
 310     title->vts = d->vmg->tt_srpt->title[t-1].title_set_nr;
 311
 312     if ( !title->vts )
 313     {
 314         /* A VTS of 0 means the title wasn't found in the title set */
 315         hb_error("Invalid VTS (title set) number: %i", title->vts);
 316         goto fail;
 317     }
 318
 319     hb_log( "scan: opening IFO for VTS %d", title->vts );
 320     if( !( ifo = ifoOpen( d->reader, title->vts ) ) )
 321     {
 322         hb_error( "scan: ifoOpen failed" );
 323         goto fail;
 324     }
 325
 326     /* ignore titles with bogus cell addresses so we don't abort later
 327      ** in libdvdread. */
 328     for ( i = 0; i < ifo->vts_c_adt->nr_of_vobs; ++i)
 329     {
 330         if( (ifo->vts_c_adt->cell_adr_table[i].start_sector & 0xffffff ) ==
 331             0xffffff )
 332         {
 333             hb_error( "scan: cell_adr_table[%d].start_sector invalid (0x%x) "
 334                       "- skipping title", i,
 335                       ifo->vts_c_adt->cell_adr_table[i].start_sector );
 336             goto fail;
 337         }
 338         if( (ifo->vts_c_adt->cell_adr_table[i].last_sector & 0xffffff ) ==
 339             0xffffff )
 340         {
 341             hb_error( "scan: cell_adr_table[%d].last_sector invalid (0x%x) "
 342                       "- skipping title", i,
 343                       ifo->vts_c_adt->cell_adr_table[i].last_sector );
 344             goto fail;
 345         }
 346         if( ifo->vts_c_adt->cell_adr_table[i].start_sector >=
 347             ifo->vts_c_adt->cell_adr_table[i].last_sector )
 348         {
 349             hb_error( "scan: cell_adr_table[%d].start_sector (0x%x) "
 350                       "is not before last_sector (0x%x) - skipping title", i,
 351                       ifo->vts_c_adt->cell_adr_table[i].start_sector,
 352                       ifo->vts_c_adt->cell_adr_table[i].last_sector );
 353             goto fail;
 354         }
 355     }
 356
 357     if( global_verbosity_level == 3 )
 358     {
 359         ifo_print( d->reader, title->vts );
 360     }
 361
 362     /* Position of the title in the VTS */
 363     title->ttn = d->vmg->tt_srpt->title[t-1].vts_ttn;
 364     if ( title->ttn < 1 || title->ttn > ifo->vts_ptt_srpt->nr_of_srpts )
 365     {
 366         hb_error( "invalid VTS PTT offset %d for title %d, skipping", title->ttn, t );
 367         goto fail;
 368     }
 369
 370     longest = 0LL;
 371     longest_pgcn = -1;
 372     longest_pgn = 1;
 373     longest_pgcn_end = -1;
 374     pgcn_end = -1;
 375     for( i = 0; i < ifo->vts_ptt_srpt->title[title->ttn-1].nr_of_ptts; i++ )
 376     {
 377         int blocks = 0;
 378
 379         duration = PttDuration(ifo, title->ttn, i+1, &blocks, &pgcn_end);
 380         pgcn  = ifo->vts_ptt_srpt->title[title->ttn-1].ptt[i].pgcn;
 381         pgn   = ifo->vts_ptt_srpt->title[title->ttn-1].ptt[i].pgn;
 382         if( duration > longest )
 383         {
 384             longest_pgcn  = pgcn;
 385             longest_pgn   = pgn;
 386             longest_pgcn_end   = pgcn_end;
 387             longest = duration;
 388             title->block_count = blocks;
 389         }
 390         else if (pgcn == longest_pgcn && pgn < longest_pgn)
 391         {
 392             longest_pgn   = pgn;
 393             title->block_count = blocks;
 394         }
 395     }
 396
 397     /* ignore titles under 10 seconds because they're often stills or
 398      * clips with no audio & our preview code doesn't currently handle
 399      * either of these. */
 400     if( longest < 900000LL )
 401     {
 402         hb_log( "scan: ignoring title (too short)" );
 403         goto fail;
 404     }
 405
 406     pgcn       = longest_pgcn;
 407     pgcn_end   = longest_pgcn_end;
 408     pgn        = longest_pgn;;
 409     title_pgcn = pgcn;
 410
 411
 412     /* Get pgc */
 413     if ( pgcn < 1 || pgcn > ifo->vts_pgcit->nr_of_pgci_srp || pgcn >= MAX_PGCN)
 414     {
 415         hb_error( "invalid PGC ID %d for title %d, skipping", pgcn, t );
 416         goto fail;
 417     }
 418
 419     pgc = ifo->vts_pgcit->pgci_srp[pgcn-1].pgc;
 420
 421     hb_log("pgc_id: %d, pgn: %d: pgc: 0x%x", pgcn, pgn, pgc);
 422
 423     /* Title start */
 424     title->cell_start = pgc->program_map[pgn-1] - 1;
 425     title->block_start = pgc->cell_playback[title->cell_start].first_sector;
 426
 427     pgc = ifo->vts_pgcit->pgci_srp[pgcn_end-1].pgc;
 428
 429     /* Title end */
 430     title->cell_end = pgc->nr_of_cells - 1;
 431     title->block_end = pgc->cell_playback[title->cell_end].last_sector;
 432
 433     hb_log( "scan: vts=%d, ttn=%d, cells=%d->%d, blocks=%d->%d, "
 434             "%d blocks", title->vts, title->ttn, title->cell_start,
 435             title->cell_end, title->block_start, title->block_end,
 436             title->block_count );
 437
 438     /* Get duration */
 439     title->duration = longest;
 440     title->hours    = title->duration / 90000 / 3600;
 441     title->minutes  = ( ( title->duration / 90000 ) % 3600 ) / 60;
 442     title->seconds  = ( title->duration / 90000 ) % 60;
 443     hb_log( "scan: duration is %02d:%02d:%02d (%lld ms)",
 444             title->hours, title->minutes, title->seconds,
 445             title->duration / 90 );
 446
 447     /* Detect languages */
 448     for( i = 0; i < ifo->vtsi_mat->nr_of_vts_audio_streams; i++ )
 449     {
 450         hb_audio_t * audio, * audio_tmp;
 451         int          audio_format, lang_code, audio_control,
 452                      position, j;
 453         iso639_lang_t * lang;
 454         int lang_extension = 0;
 455
 456         hb_log( "scan: checking audio %d", i + 1 );
 457
 458         audio = calloc( sizeof( hb_audio_t ), 1 );
 459
 460         audio_format  = ifo->vtsi_mat->vts_audio_attr[i].audio_format;
 461         lang_code     = ifo->vtsi_mat->vts_audio_attr[i].lang_code;
 462         lang_extension = ifo->vtsi_mat->vts_audio_attr[i].code_extension;
 463         audio_control =
 464             ifo->vts_pgcit->pgci_srp[title_pgcn-1].pgc->audio_control[i];
 465
 466         if( !( audio_control & 0x8000 ) )
 467         {
 468             hb_log( "scan: audio channel is not active" );
 469             free( audio );
 470             continue;
 471         }
 472
 473         position = ( audio_control & 0x7F00 ) >> 8;
 474
 475         switch( audio_format )
 476         {
 477             case 0x00:
 478                 audio->id    = ( ( 0x80 + position ) << 8 ) | 0xbd;
 479                 audio->config.in.codec = HB_ACODEC_AC3;
 480                 break;
 481
 482             case 0x02:
 483             case 0x03:
 484                 audio->id    = 0xc0 + position;
 485                 audio->config.in.codec = HB_ACODEC_MPGA;
 486                 break;
 487
 488             case 0x04:
 489                 audio->id    = ( ( 0xa0 + position ) << 8 ) | 0xbd;
 490                 audio->config.in.codec = HB_ACODEC_LPCM;
 491                 break;
 492
 493             case 0x06:
 494                 audio->id    = ( ( 0x88 + position ) << 8 ) | 0xbd;
 495                 audio->config.in.codec = HB_ACODEC_DCA;
 496                 break;
 497
 498             default:
 499                 audio->id    = 0;
 500                 audio->config.in.codec = 0;
 501                 hb_log( "scan: unknown audio codec (%x)",
 502                         audio_format );
 503                 break;
 504         }
 505         if( !audio->id )
 506         {
 507             continue;
 508         }
 509
 510         /* Check for duplicate tracks */
 511         audio_tmp = NULL;
 512         for( j = 0; j < hb_list_count( title->list_audio ); j++ )
 513         {
 514             audio_tmp = hb_list_item( title->list_audio, j );
 515             if( audio->id == audio_tmp->id )
 516             {
 517                 break;
 518             }
 519             audio_tmp = NULL;
 520         }
 521         if( audio_tmp )
 522         {
 523             hb_log( "scan: duplicate audio track" );
 524             free( audio );
 525             continue;
 526         }
 527
 528         audio->config.lang.type = lang_extension;
 529
 530         lang = lang_for_code( ifo->vtsi_mat->vts_audio_attr[i].lang_code );
 531
 532         snprintf( audio->config.lang.description, sizeof( audio->config.lang.description ), "%s (%s)",
 533             strlen(lang->native_name) ? lang->native_name : lang->eng_name,
 534             audio->config.in.codec == HB_ACODEC_AC3 ? "AC3" : ( audio->config.in.codec ==
 535                 HB_ACODEC_DCA ? "DTS" : ( audio->config.in.codec ==
 536                 HB_ACODEC_MPGA ? "MPEG" : "LPCM" ) ) );
 537         snprintf( audio->config.lang.simple, sizeof( audio->config.lang.simple ), "%s",
 538                   strlen(lang->native_name) ? lang->native_name : lang->eng_name );
 539         snprintf( audio->config.lang.iso639_2, sizeof( audio->config.lang.iso639_2 ), "%s",
 540                   lang->iso639_2);
 541
 542         switch( lang_extension )
 543         {
 544         case 0:
 545         case 1:
 546             break;
 547         case 2:
 548             strcat( audio->config.lang.description, " (Visually Impaired)" );
 549             break;
 550         case 3:
 551             strcat( audio->config.lang.description, " (Director's Commentary 1)" );
 552             break;
 553         case 4:
 554             strcat( audio->config.lang.description, " (Director's Commentary 2)" );
 555             break;
 556         default:
 557             break;
 558         }
 559
 560         hb_log( "scan: id=%x, lang=%s, 3cc=%s ext=%i", audio->id,
 561                 audio->config.lang.description, audio->config.lang.iso639_2,
 562                 lang_extension );
 563
 564         audio->config.in.track = i;
 565         hb_list_add( title->list_audio, audio );
 566     }
 567
 568     if( !hb_list_count( title->list_audio ) )
 569     {
 570         hb_log( "scan: ignoring title (no audio track)" );
 571         goto fail;
 572     }
 573
 574     memcpy( title->palette,
 575             ifo->vts_pgcit->pgci_srp[title_pgcn-1].pgc->palette,
 576             16 * sizeof( uint32_t ) );
 577
 578     /* Check for subtitles */
 579     for( i = 0; i < ifo->vtsi_mat->nr_of_vts_subp_streams; i++ )
 580     {
 581         hb_subtitle_t * subtitle;
 582         int spu_control;
 583         int position;
 584         iso639_lang_t * lang;
 585         int lang_extension = 0;
 586
 587         hb_log( "scan: checking subtitle %d", i + 1 );
 588
 589         spu_control =
 590             ifo->vts_pgcit->pgci_srp[title_pgcn-1].pgc->subp_control[i];
 591
 592         if( !( spu_control & 0x80000000 ) )
 593         {
 594             hb_log( "scan: subtitle channel is not active" );
 595             continue;
 596         }
 597
 598         if( ifo->vtsi_mat->vts_video_attr.display_aspect_ratio )
 599         {
 600             switch( ifo->vtsi_mat->vts_video_attr.permitted_df )
 601             {
 602                 case 1:
 603                     position = spu_control & 0xFF;
 604                     break;
 605                 case 2:
 606                     position = ( spu_control >> 8 ) & 0xFF;
 607                     break;
 608                 default:
 609                     position = ( spu_control >> 16 ) & 0xFF;
 610             }
 611         }
 612         else
 613         {
 614             position = ( spu_control >> 24 ) & 0x7F;
 615         }
 616
 617         lang_extension = ifo->vtsi_mat->vts_subp_attr[i].code_extension;
 618
 619         lang = lang_for_code( ifo->vtsi_mat->vts_subp_attr[i].lang_code );
 620
 621         subtitle = calloc( sizeof( hb_subtitle_t ), 1 );
 622         subtitle->track = i+1;
 623         subtitle->id = ( ( 0x20 + position ) << 8 ) | 0xbd;
 624         snprintf( subtitle->lang, sizeof( subtitle->lang ), "%s",
 625              strlen(lang->native_name) ? lang->native_name : lang->eng_name);
 626         snprintf( subtitle->iso639_2, sizeof( subtitle->iso639_2 ), "%s",
 627                   lang->iso639_2);
 628         subtitle->format = PICTURESUB;
 629         subtitle->source = VOBSUB;
 630         subtitle->dest   = RENDERSUB;  // By default render (burn-in) the VOBSUB.
 631
 632         subtitle->type = lang_extension;
 633
 634         switch( lang_extension )
 635         {
 636         case 0:
 637             break;
 638         case 1:
 639             break;
 640         case 2:
 641             strcat( subtitle->lang, " (Caption with bigger size character)");
 642             break;
 643         case 3:
 644             strcat( subtitle->lang, " (Caption for Children)");
 645             break;
 646         case 4:
 647             break;
 648         case 5:
 649             strcat( subtitle->lang, " (Closed Caption)");
 650             break;
 651         case 6:
 652             strcat( subtitle->lang, " (Closed Caption with bigger size character)");
 653             break;
 654         case 7:
 655             strcat( subtitle->lang, " (Closed Caption for Children)");
 656             break;
 657         case 8:
 658             break;
 659         case 9:
 660             strcat( subtitle->lang, " (Forced Caption)");
 661             break;
 662         case 10:
 663             break;
 664         case 11:
 665             break;
 666         case 12:
 667             break;
 668         case 13:
 669             strcat( subtitle->lang, " (Director's Commentary)");
 670             break;
 671         case 14:
 672             strcat( subtitle->lang, " (Director's Commentary with bigger size character)");
 673             break;
 674         case 15:
 675             strcat( subtitle->lang, " (Director's Commentary for Children)");
 676         default:
 677             break;
 678         }
 679
 680         hb_log( "scan: id=%x, lang=%s, 3cc=%s", subtitle->id,
 681                 subtitle->lang, subtitle->iso639_2 );
 682
 683         hb_list_add( title->list_subtitle, subtitle );
 684     }
 685
 686     /* Chapters */
 687     uint32_t pgcn_map[MAX_PGCN/32];
 688     PgcWalkInit( pgcn_map );
 689     c = 0;
 690     do
 691     {
 692         pgc = ifo->vts_pgcit->pgci_srp[pgcn-1].pgc;
 693
 694         for (i = pgn; i <= pgc->nr_of_programs; i++)
 695         {
 696             chapter = calloc( sizeof( hb_chapter_t ), 1 );
 697
 698             chapter->index = c + 1;
 699             chapter->pgcn = pgcn;
 700             chapter->pgn = i;
 701             hb_list_add( title->list_chapter, chapter );
 702             c++;
 703         }
 704
 705         pgn = 1;
 706     } while ((pgcn = NextPgcn(ifo, pgcn, pgcn_map)) != 0);
 707
 708     hb_log( "scan: title %d has %d chapters", t, c );
 709
 710     duration = 0;
 711     count = hb_list_count( title->list_chapter );
 712     for (i = 0; i < count; i++)
 713     {
 714         chapter = hb_list_item( title->list_chapter, i );
 715
 716         pgcn = chapter->pgcn;
 717         pgn = chapter->pgn;
 718         pgc = ifo->vts_pgcit->pgci_srp[pgcn-1].pgc;
 719
 720         /* Start cell */
 721         chapter->cell_start  = pgc->program_map[pgn-1] - 1;
 722         chapter->block_start = pgc->cell_playback[chapter->cell_start].first_sector;
 723         // if there are no more programs in this pgc, the end cell is the
 724         // last cell. Otherwise it's the cell before the start cell of the
 725         // next program.
 726         if ( pgn == pgc->nr_of_programs )
 727         {
 728             chapter->cell_end = pgc->nr_of_cells - 1;
 729         }
 730         else
 731         {
 732             chapter->cell_end = pgc->program_map[pgn] - 2;;
 733         }
 734         chapter->block_end = pgc->cell_playback[chapter->cell_end].last_sector;
 735
 736         /* Block count, duration */
 737         chapter->block_count = 0;
 738         chapter->duration = 0;
 739
 740         cell_cur = chapter->cell_start;
 741         while( cell_cur <= chapter->cell_end )
 742         {
 743 #define cp pgc->cell_playback[cell_cur]
 744             chapter->block_count += cp.last_sector + 1 - cp.first_sector;
 745             chapter->duration += 90LL * dvdtime2msec( &cp.playback_time );
 746 #undef cp
 747             cell_cur = FindNextCell( pgc, cell_cur );
 748         }
 749         duration += chapter->duration;
 750     }
 751
 752     /* The durations we get for chapters aren't precise. Scale them so
 753        the total matches the title duration */
 754     duration_correction = (float) title->duration / (float) duration;
 755     for( i = 0; i < hb_list_count( title->list_chapter ); i++ )
 756     {
 757         int seconds;
 758         chapter            = hb_list_item( title->list_chapter, i );
 759         chapter->duration  = duration_correction * chapter->duration;
 760         seconds            = ( chapter->duration + 45000 ) / 90000;
 761         chapter->hours     = seconds / 3600;
 762         chapter->minutes   = ( seconds % 3600 ) / 60;
 763         chapter->seconds   = seconds % 60;
 764
 765         hb_log( "scan: chap %d c=%d->%d, b=%d->%d (%d), %lld ms",
 766                 chapter->index, chapter->cell_start, chapter->cell_end,
 767                 chapter->block_start, chapter->block_end,
 768                 chapter->block_count, chapter->duration / 90 );
 769     }
 770
 771     /* Get aspect. We don't get width/height/rate infos here as
 772        they tend to be wrong */
 773     switch( ifo->vtsi_mat->vts_video_attr.display_aspect_ratio )
 774     {
 775         case 0:
 776             title->container_aspect = 4. / 3.;
 777             break;
 778         case 3:
 779             title->container_aspect = 16. / 9.;
 780             break;
 781         default:
 782             hb_log( "scan: unknown aspect" );
 783             goto fail;
 784     }
 785
 786     hb_log( "scan: aspect = %g", title->aspect );
 787
 788     /* This title is ok so far */
 789     goto cleanup;
 790
 791 fail:
 792     hb_list_close( &title->list_audio );
 793     free( title );
 794     title = NULL;
 795
 796 cleanup:
 797     if( ifo ) ifoClose( ifo );
 798
 799     return title;
 800 }
 801
 802 /***********************************************************************
 803  * hb_dvdnav_start
 804  ***********************************************************************
 805  * Title and chapter start at 1
 806  **********************************************************************/
 807 static int hb_dvdnav_start( hb_dvd_t * e, hb_title_t *title, int c )
 808 {
 809     hb_dvdnav_t * d = &(e->dvdnav);
 810     int t = title->index;
 811     hb_chapter_t *chapter;
 812     dvdnav_status_t result;
 813
 814     d->title_block_count = title->block_count;
 815     d->list_chapter = title->list_chapter;
 816
 817     if ( d->stopped && !hb_dvdnav_reset(d) )
 818     {
 819         return 0;
 820     }
 821     chapter = hb_list_item( title->list_chapter, c - 1);
 822     if (chapter != NULL)
 823         result = dvdnav_program_play(d->dvdnav, t, chapter->pgcn, chapter->pgn);
 824     else
 825         result = dvdnav_part_play(d->dvdnav, t, 1);
 826     if (result != DVDNAV_STATUS_OK)
 827     {
 828         hb_error( "dvd: dvdnav_*_play failed - %s",
 829                   dvdnav_err_to_string(d->dvdnav) );
 830         return 0;
 831     }
 832     d->title = t;
 833     d->stopped = 0;
 834     return 1;
 835 }
 836
 837 /***********************************************************************
 838  * hb_dvdnav_stop
 839  ***********************************************************************
 840  *
 841  **********************************************************************/
 842 static void hb_dvdnav_stop( hb_dvd_t * e )
 843 {
 844 }
 845
 846 /***********************************************************************
 847  * hb_dvdnav_seek
 848  ***********************************************************************
 849  *
 850  **********************************************************************/
 851 static int hb_dvdnav_seek( hb_dvd_t * e, float f )
 852 {
 853     hb_dvdnav_t * d = &(e->dvdnav);
 854     uint64_t sector = f * d->title_block_count;
 855     int result, event, len;
 856     uint8_t buf[HB_DVD_READ_BUFFER_SIZE];
 857     int done = 0, ii;
 858
 859     if (d->stopped)
 860     {
 861         return 0;
 862     }
 863
 864     // XXX the current version of libdvdnav can't seek outside the current
 865     // PGC. Check if the place we're seeking to is in a different
 866     // PGC. Position there & adjust the offset if so.
 867     hb_chapter_t *pgc_change = hb_list_item(d->list_chapter, 0 );
 868     for ( ii = 0; ii < hb_list_count( d->list_chapter ); ++ii )
 869     {
 870         hb_chapter_t *chapter = hb_list_item( d->list_chapter, ii );
 871
 872         if ( chapter->pgcn != pgc_change->pgcn )
 873         {
 874             // this chapter's in a different pgc from the previous - note the
 875             // change so we can make sector offset's be pgc relative.
 876             pgc_change = chapter;
 877         }
 878         if ( chapter->block_start <= sector && sector <= chapter->block_end )
 879         {
 880             // this chapter contains the sector we want - see if it's in a
 881             // different pgc than the one we're currently in.
 882             int32_t title, pgcn, pgn;
 883             if (dvdnav_current_title_program( d->dvdnav, &title, &pgcn, &pgn ) != DVDNAV_STATUS_OK)
 884                 hb_log("dvdnav cur pgcn err: %s", dvdnav_err_to_string(d->dvdnav));
 885             if ( d->title != title || chapter->pgcn != pgcn )
 886             {
 887                 // this chapter is in a different pgc - switch to it.
 888                 if (dvdnav_program_play(d->dvdnav, d->title, chapter->pgcn, chapter->pgn) != DVDNAV_STATUS_OK)
 889                     hb_log("dvdnav prog play err: %s", dvdnav_err_to_string(d->dvdnav));
 890             }
 891             // seek sectors are pgc-relative so remove the pgc start sector.
 892             sector -= pgc_change->block_start;
 893             break;
 894         }
 895     }
 896
 897     // dvdnav will not let you seek or poll current position
 898     // till it reaches a certain point in parsing.  so we
 899     // have to get blocks until we reach a cell
 900     // Put an arbitrary limit of 100 blocks on how long we search
 901     for (ii = 0; ii < 100 && !done; ii++)
 902     {
 903         result = dvdnav_get_next_block( d->dvdnav, buf, &event, &len );
 904         if ( result == DVDNAV_STATUS_ERR )
 905         {
 906             hb_log("dvdnav: Read Error, %s", dvdnav_err_to_string(d->dvdnav));
 907             return 0;
 908         }
 909         switch ( event )
 910         {
 911         case DVDNAV_BLOCK_OK:
 912         case DVDNAV_CELL_CHANGE:
 913             done = 1;
 914             break;
 915
 916         case DVDNAV_STILL_FRAME:
 917             dvdnav_still_skip( d->dvdnav );
 918             break;
 919
 920         case DVDNAV_WAIT:
 921             dvdnav_wait_skip( d->dvdnav );
 922             break;
 923
 924         case DVDNAV_STOP:
 925             hb_log("dvdnav: stop encountered during seek");
 926             d->stopped = 1;
 927             return 0;
 928
 929         case DVDNAV_HOP_CHANNEL:
 930         case DVDNAV_NAV_PACKET:
 931         case DVDNAV_VTS_CHANGE:
 932         case DVDNAV_HIGHLIGHT:
 933         case DVDNAV_AUDIO_STREAM_CHANGE:
 934         case DVDNAV_SPU_STREAM_CHANGE:
 935         case DVDNAV_SPU_CLUT_CHANGE:
 936         case DVDNAV_NOP:
 937         default:
 938             break;
 939         }
 940     }
 941
 942     if (dvdnav_sector_search(d->dvdnav, sector, SEEK_SET) != DVDNAV_STATUS_OK)
 943     {
 944         hb_error( "dvd: dvdnav_sector_search failed - %s",
 945                   dvdnav_err_to_string(d->dvdnav) );
 946         return 0;
 947     }
 948     return 1;
 949 }
 950
 951 /***********************************************************************
 952  * hb_dvdnav_read
 953  ***********************************************************************
 954  *
 955  **********************************************************************/
 956 static int hb_dvdnav_read( hb_dvd_t * e, hb_buffer_t * b )
 957 {
 958     hb_dvdnav_t * d = &(e->dvdnav);
 959     int result, event, len;
 960     int chapter = 0;
 961
 962     while ( 1 )
 963     {
 964         if (d->stopped)
 965         {
 966             return 0;
 967         }
 968         result = dvdnav_get_next_block( d->dvdnav, b->data, &event, &len );
 969         if ( result == DVDNAV_STATUS_ERR )
 970         {
 971             hb_log("dvdnav: Read Error, %s", dvdnav_err_to_string(d->dvdnav));
 972             return 0;
 973         }
 974         switch ( event )
 975         {
 976         case DVDNAV_BLOCK_OK:
 977             // We have received a regular block of the currently playing
 978             // MPEG stream.
 979
 980             // The muxers expect to only get chapter 2 and above
 981             // They write chapter 1 when chapter 2 is detected.
 982             if (chapter > 1)
 983                 b->new_chap = chapter;
 984             chapter = 0;
 985             return 1;
 986
 987         case DVDNAV_NOP:
 988             /*
 989             * Nothing to do here.
 990             */
 991             break;
 992
 993         case DVDNAV_STILL_FRAME:
 994             /*
 995             * We have reached a still frame. A real player application
 996             * would wait the amount of time specified by the still's
 997             * length while still handling user input to make menus and
 998             * other interactive stills work. A length of 0xff means an
 999             * indefinite still which has to be skipped indirectly by some
1000             * user interaction.
1001             */
1002             dvdnav_still_skip( d->dvdnav );
1003             break;
1004
1005         case DVDNAV_WAIT:
1006             /*
1007             * We have reached a point in DVD playback, where timing is
1008             * critical. Player application with internal fifos can
1009             * introduce state inconsistencies, because libdvdnav is
1010             * always the fifo's length ahead in the stream compared to
1011             * what the application sees. Such applications should wait
1012             * until their fifos are empty when they receive this type of
1013             * event.
1014             */
1015             dvdnav_wait_skip( d->dvdnav );
1016             break;
1017
1018         case DVDNAV_SPU_CLUT_CHANGE:
1019             /*
1020             * Player applications should pass the new colour lookup table
1021             * to their SPU decoder
1022             */
1023             break;
1024
1025         case DVDNAV_SPU_STREAM_CHANGE:
1026             /*
1027             * Player applications should inform their SPU decoder to
1028             * switch channels
1029             */
1030             break;
1031
1032         case DVDNAV_AUDIO_STREAM_CHANGE:
1033             /*
1034             * Player applications should inform their audio decoder to
1035             * switch channels
1036             */
1037             break;
1038
1039         case DVDNAV_HIGHLIGHT:
1040             /*
1041             * Player applications should inform their overlay engine to
1042             * highlight the given button
1043             */
1044             break;
1045
1046         case DVDNAV_VTS_CHANGE:
1047             /*
1048             * Some status information like video aspect and video scale
1049             * permissions do not change inside a VTS. Therefore this
1050             * event can be used to query such information only when
1051             * necessary and update the decoding/displaying accordingly.
1052             */
1053             break;
1054
1055         case DVDNAV_CELL_CHANGE:
1056             /*
1057             * Some status information like the current Title and Part
1058             * numbers do not change inside a cell. Therefore this event
1059             * can be used to query such information only when necessary
1060             * and update the decoding/displaying accordingly.
1061             */
1062             {
1063                 int tt = 0, pgcn = 0, pgn = 0, c;
1064
1065                 dvdnav_current_title_program(d->dvdnav, &tt, &pgcn, &pgn);
1066                 if (tt != d->title)
1067                 {
1068                     // Transition to another title signals that we are done.
1069                     return 0;
1070                 }
1071                 c = FindChapterIndex(d->list_chapter, pgcn, pgn);
1072                 if (c > d->chapter)
1073                     chapter = d->chapter = c;
1074             }
1075             break;
1076
1077         case DVDNAV_NAV_PACKET:
1078             /*
1079             * A NAV packet provides PTS discontinuity information, angle
1080             * linking information and button definitions for DVD menus.
1081             * Angles are handled completely inside libdvdnav. For the
1082             * menus to work, the NAV packet information has to be passed
1083             * to the overlay engine of the player so that it knows the
1084             * dimensions of the button areas.
1085             */
1086
1087             // mpegdemux expects to get these.  I don't think it does
1088             // anything useful with them however.
1089
1090             // The muxers expect to only get chapter 2 and above
1091             // They write chapter 1 when chapter 2 is detected.
1092             if (chapter > 1)
1093                 b->new_chap = chapter;
1094             chapter = 0;
1095             return 1;
1096
1097             break;
1098
1099         case DVDNAV_HOP_CHANNEL:
1100             /*
1101             * This event is issued whenever a non-seamless operation has
1102             * been executed. Applications with fifos should drop the
1103             * fifos content to speed up responsiveness.
1104             */
1105             break;
1106
1107         case DVDNAV_STOP:
1108             /*
1109             * Playback should end here.
1110             */
1111             d->stopped = 1;
1112             return 0;
1113
1114         default:
1115             break;
1116         }
1117     }
1118     return 0;
1119 }
1120
1121 /***********************************************************************
1122  * hb_dvdnav_chapter
1123  ***********************************************************************
1124  * Returns in which chapter the next block to be read is.
1125  * Chapter numbers start at 1.
1126  **********************************************************************/
1127 static int hb_dvdnav_chapter( hb_dvd_t * e )
1128 {
1129     hb_dvdnav_t * d = &(e->dvdnav);
1130     int32_t t, pgcn, pgn;
1131     int32_t c;
1132
1133     if (dvdnav_current_title_program(d->dvdnav, &t, &pgcn, &pgn) != DVDNAV_STATUS_OK)
1134     {
1135         return -1;
1136     }
1137     c = FindChapterIndex( d->list_chapter, pgcn, pgn );
1138     return c;
1139 }
1140
1141 /***********************************************************************
1142  * hb_dvdnav_close
1143  ***********************************************************************
1144  * Closes and frees everything
1145  **********************************************************************/
1146 static void hb_dvdnav_close( hb_dvd_t ** _d )
1147 {
1148     hb_dvdnav_t * d = &((*_d)->dvdnav);
1149
1150     if( d->dvdnav ) dvdnav_close( d->dvdnav );
1151     if( d->vmg ) ifoClose( d->vmg );
1152     if( d->reader ) DVDClose( d->reader );
1153
1154     free( d );
1155     *_d = NULL;
1156 }
1157
1158 /***********************************************************************
1159  * hb_dvdnav_angle_count
1160  ***********************************************************************
1161  * Returns the number of angles supported.
1162  **********************************************************************/
1163 static int hb_dvdnav_angle_count( hb_dvd_t * e )
1164 {
1165     hb_dvdnav_t * d = &(e->dvdnav);
1166     int current, angle_count;
1167
1168     if (dvdnav_get_angle_info( d->dvdnav, &current, &angle_count) != DVDNAV_STATUS_OK)
1169     {
1170         hb_log("dvdnav_get_angle_info %s", dvdnav_err_to_string(d->dvdnav));
1171         angle_count = 1;
1172     }
1173     return angle_count;
1174 }
1175
1176 /***********************************************************************
1177  * hb_dvdnav_set_angle
1178  ***********************************************************************
1179  * Sets the angle to read
1180  **********************************************************************/
1181 static void hb_dvdnav_set_angle( hb_dvd_t * e, int angle )
1182 {
1183     hb_dvdnav_t * d = &(e->dvdnav);
1184
1185     if (dvdnav_angle_change( d->dvdnav, angle) != DVDNAV_STATUS_OK)
1186     {
1187         hb_log("dvdnav_angle_change %s", dvdnav_err_to_string(d->dvdnav));
1188     }
1189 }
1190
1191 /***********************************************************************
1192  * FindChapterIndex
1193  ***********************************************************************
1194  * Assumes pgc and cell_cur are correctly set, and sets cell_next to the
1195  * cell to be read when we will be done with cell_cur.
1196  **********************************************************************/
1197 static int FindChapterIndex( hb_list_t * list, int pgcn, int pgn )
1198 {
1199     int count, ii;
1200     hb_chapter_t *chapter;
1201
1202     count = hb_list_count( list );
1203     for (ii = 0; ii < count; ii++)
1204     {
1205         chapter = hb_list_item( list, ii );
1206         if (chapter->pgcn == pgcn && chapter->pgn == pgn)
1207             return chapter->index;
1208     }
1209     return 0;
1210 }
1211
1212 /***********************************************************************
1213  * FindNextCell
1214  ***********************************************************************
1215  * Assumes pgc and cell_cur are correctly set, and sets cell_next to the
1216  * cell to be read when we will be done with cell_cur.
1217  **********************************************************************/
1218 static int FindNextCell( pgc_t *pgc, int cell_cur )
1219 {
1220     int i = 0;
1221     int cell_next;
1222
1223     if( pgc->cell_playback[cell_cur].block_type ==
1224             BLOCK_TYPE_ANGLE_BLOCK )
1225     {
1226
1227         while( pgc->cell_playback[cell_cur+i].block_mode !=
1228                    BLOCK_MODE_LAST_CELL )
1229         {
1230              i++;
1231         }
1232         cell_next = cell_cur + i + 1;
1233         hb_log( "dvd: Skipping multi-angle cells %d-%d",
1234                 cell_cur,
1235                 cell_next - 1 );
1236     }
1237     else
1238     {
1239         cell_next = cell_cur + 1;
1240     }
1241     return cell_next;
1242 }
1243
1244 /***********************************************************************
1245  * NextPgcn
1246  ***********************************************************************
1247  * Assumes pgc and cell_cur are correctly set, and sets cell_next to the
1248  * cell to be read when we will be done with cell_cur.
1249  * Since pg chains can be circularly linked (either from a read error or
1250  * deliberately) pgcn_map tracks program chains we've already seen.
1251  **********************************************************************/
1252 static int NextPgcn( ifo_handle_t *ifo, int pgcn, uint32_t pgcn_map[MAX_PGCN/32] )
1253 {
1254     int next_pgcn;
1255     pgc_t *pgc;
1256
1257     pgcn_map[pgcn >> 5] |= (1 << (pgcn & 31));
1258
1259     pgc = ifo->vts_pgcit->pgci_srp[pgcn-1].pgc;
1260     next_pgcn = pgc->next_pgc_nr;
1261     if ( next_pgcn < 1 || next_pgcn >= MAX_PGCN || next_pgcn > ifo->vts_pgcit->nr_of_pgci_srp )
1262         return 0;
1263
1264     return pgcn_map[next_pgcn >> 5] & (1 << (next_pgcn & 31))? 0 : next_pgcn;
1265 }
1266
1267 /***********************************************************************
1268  * PgcWalkInit
1269  ***********************************************************************
1270  * Pgc links can loop. I track which have been visited in a bit vector
1271  * Initialize the bit vector to empty.
1272  **********************************************************************/
1273 static void PgcWalkInit( uint32_t pgcn_map[MAX_PGCN/32] )
1274 {
1275     memset(pgcn_map, 0, sizeof(pgcn_map) );
1276 }
1277
1278 /***********************************************************************
1279  * dvdtime2msec
1280  ***********************************************************************
1281  * From lsdvd
1282  **********************************************************************/
1283 static int dvdtime2msec(dvd_time_t * dt)
1284 {
1285     double frames_per_s[4] = {-1.0, 25.00, -1.0, 29.97};
1286     double fps = frames_per_s[(dt->frame_u & 0xc0) >> 6];
1287     long   ms;
1288     ms  = (((dt->hour &   0xf0) >> 3) * 5 + (dt->hour   & 0x0f)) * 3600000;
1289     ms += (((dt->minute & 0xf0) >> 3) * 5 + (dt->minute & 0x0f)) * 60000;
1290     ms += (((dt->second & 0xf0) >> 3) * 5 + (dt->second & 0x0f)) * 1000;
1291
1292     if( fps > 0 )
1293     {
1294         ms += ((dt->frame_u & 0x30) >> 3) * 5 +
1295               (dt->frame_u & 0x0f) * 1000.0 / fps;
1296     }
1297
1298     return ms;
1299 }