libhb/dvd.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 "dvdread/ifo_read.h"
  12 #include "dvdread/ifo_print.h"
  13 #include "dvdread/nav_read.h"
  14
  15 static hb_dvd_t    * hb_dvdread_init( char * path );
  16 static void          hb_dvdread_close( hb_dvd_t ** _d );
  17 static char        * hb_dvdread_name( char * path );
  18 static int           hb_dvdread_title_count( hb_dvd_t * d );
  19 static hb_title_t  * hb_dvdread_title_scan( hb_dvd_t * d, int t, uint64_t min_duration );
  20 static int           hb_dvdread_start( hb_dvd_t * d, hb_title_t *title, int chapter );
  21 static void          hb_dvdread_stop( hb_dvd_t * d );
  22 static int           hb_dvdread_seek( hb_dvd_t * d, float f );
  23 static int           hb_dvdread_read( hb_dvd_t * d, hb_buffer_t * b );
  24 static int           hb_dvdread_chapter( hb_dvd_t * d );
  25 static int           hb_dvdread_angle_count( hb_dvd_t * d );
  26 static void          hb_dvdread_set_angle( hb_dvd_t * d, int angle );
  27 static int           hb_dvdread_main_feature( hb_dvd_t * d, hb_list_t * list_title );
  28
  29 hb_dvd_func_t hb_dvdread_func =
  30 {
  31     hb_dvdread_init,
  32     hb_dvdread_close,
  33     hb_dvdread_name,
  34     hb_dvdread_title_count,
  35     hb_dvdread_title_scan,
  36     hb_dvdread_start,
  37     hb_dvdread_stop,
  38     hb_dvdread_seek,
  39     hb_dvdread_read,
  40     hb_dvdread_chapter,
  41     hb_dvdread_angle_count,
  42     hb_dvdread_set_angle,
  43     hb_dvdread_main_feature
  44 };
  45
  46 static hb_dvd_func_t *dvd_methods = &hb_dvdread_func;
  47
  48 /***********************************************************************
  49  * Local prototypes
  50  **********************************************************************/
  51 static void FindNextCell( hb_dvdread_t * );
  52 static int  dvdtime2msec( dvd_time_t * );
  53 static int hb_dvdread_is_break( hb_dvdread_t * d );
  54
  55 hb_dvd_func_t * hb_dvdread_methods( void )
  56 {
  57     return &hb_dvdread_func;
  58 }
  59
  60 static int hb_dvdread_main_feature( hb_dvd_t * e, hb_list_t * list_title )
  61 {
  62     int ii;
  63     uint64_t longest_duration = 0;
  64     int longest = -1;
  65
  66     for ( ii = 0; ii < hb_list_count( list_title ); ii++ )
  67     {
  68         hb_title_t * title = hb_list_item( list_title, ii );
  69         if ( title->duration > longest_duration )
  70         {
  71             longest_duration = title->duration;
  72             longest = title->index;
  73         }
  74     }
  75     return longest;
  76 }
  77
  78 static char * hb_dvdread_name( char * path )
  79 {
  80     static char name[1024];
  81     unsigned char unused[1024];
  82     dvd_reader_t * reader;
  83
  84     reader = DVDOpen( path );
  85     if( !reader )
  86     {
  87         return NULL;
  88     }
  89
  90     if( DVDUDFVolumeInfo( reader, name, sizeof( name ),
  91                           unused, sizeof( unused ) ) )
  92     {
  93         DVDClose( reader );
  94         return NULL;
  95     }
  96
  97     DVDClose( reader );
  98     return name;
  99 }
 100
 101 /***********************************************************************
 102  * hb_dvdread_init
 103  ***********************************************************************
 104  *
 105  **********************************************************************/
 106 hb_dvd_t * hb_dvdread_init( char * path )
 107 {
 108     hb_dvd_t * e;
 109     hb_dvdread_t * d;
 110     int region_mask;
 111
 112     e = calloc( sizeof( hb_dvd_t ), 1 );
 113     d = &(e->dvdread);
 114
 115         /* Log DVD drive region code */
 116     if ( hb_dvd_region( path, &region_mask ) == 0 )
 117     {
 118         hb_log( "dvd: Region mask 0x%02x", region_mask );
 119         if ( region_mask == 0xFF )
 120         {
 121             hb_log( "dvd: Warning, DVD device has no region set" );
 122         }
 123     }
 124
 125     /* Open device */
 126     if( !( d->reader = DVDOpen( path ) ) )
 127     {
 128         /*
 129          * Not an error, may be a stream - which we'll try in a moment.
 130          */
 131         hb_log( "dvd: not a dvd - trying as a stream/file instead" );
 132         goto fail;
 133     }
 134
 135     /* Open main IFO */
 136     if( !( d->vmg = ifoOpen( d->reader, 0 ) ) )
 137     {
 138         hb_error( "dvd: ifoOpen failed" );
 139         goto fail;
 140     }
 141
 142     d->path = strdup( path );
 143
 144     return e;
 145
 146 fail:
 147     if( d->vmg )    ifoClose( d->vmg );
 148     if( d->reader ) DVDClose( d->reader );
 149     free( d );
 150     return NULL;
 151 }
 152
 153 /***********************************************************************
 154  * hb_dvdread_title_count
 155  **********************************************************************/
 156 static int hb_dvdread_title_count( hb_dvd_t * e )
 157 {
 158     hb_dvdread_t *d = &(e->dvdread);
 159     return d->vmg->tt_srpt->nr_of_srpts;
 160 }
 161
 162 /***********************************************************************
 163  * hb_dvdread_title_scan
 164  **********************************************************************/
 165 static hb_title_t * hb_dvdread_title_scan( hb_dvd_t * e, int t, uint64_t min_duration )
 166 {
 167
 168     hb_dvdread_t *d = &(e->dvdread);
 169     hb_title_t   * title;
 170     ifo_handle_t * vts = NULL;
 171     int            pgc_id, pgn, i;
 172     hb_chapter_t * chapter;
 173     int            c;
 174     uint64_t       duration;
 175     float          duration_correction;
 176     unsigned char  unused[1024];
 177
 178     hb_log( "scan: scanning title %d", t );
 179
 180     title = hb_title_init( d->path, t );
 181     title->type = HB_DVD_TYPE;
 182
 183     if( DVDUDFVolumeInfo( d->reader, title->name, sizeof( title->name ),
 184                           unused, sizeof( unused ) ) )
 185     {
 186         char * p_cur, * p_last = d->path;
 187         for( p_cur = d->path; *p_cur; p_cur++ )
 188         {
 189             if( p_cur[0] == '/' && p_cur[1] )
 190             {
 191                 p_last = &p_cur[1];
 192             }
 193         }
 194         snprintf( title->name, sizeof( title->name ), "%s", p_last );
 195     }
 196
 197     /* VTS which our title is in */
 198     title->vts = d->vmg->tt_srpt->title[t-1].title_set_nr;
 199
 200     if ( !title->vts )
 201     {
 202         /* A VTS of 0 means the title wasn't found in the title set */
 203         hb_error("Invalid VTS (title set) number: %i", title->vts);
 204         goto fail;
 205     }
 206
 207     hb_log( "scan: opening IFO for VTS %d", title->vts );
 208     if( !( vts = ifoOpen( d->reader, title->vts ) ) )
 209     {
 210         hb_error( "scan: ifoOpen failed" );
 211         goto fail;
 212     }
 213
 214     /* ignore titles with bogus cell addresses so we don't abort later
 215      * in libdvdread. */
 216     for ( i = 0; i < vts->vts_c_adt->nr_of_vobs; ++i)
 217     {
 218         if( (vts->vts_c_adt->cell_adr_table[i].start_sector & 0xffffff ) ==
 219             0xffffff )
 220         {
 221             hb_error( "scan: cell_adr_table[%d].start_sector invalid (0x%x) "
 222                       "- skipping title", i,
 223                       vts->vts_c_adt->cell_adr_table[i].start_sector );
 224             goto fail;
 225         }
 226         if( (vts->vts_c_adt->cell_adr_table[i].last_sector & 0xffffff ) ==
 227             0xffffff )
 228         {
 229             hb_error( "scan: cell_adr_table[%d].last_sector invalid (0x%x) "
 230                       "- skipping title", i,
 231                       vts->vts_c_adt->cell_adr_table[i].last_sector );
 232             goto fail;
 233         }
 234         if( vts->vts_c_adt->cell_adr_table[i].start_sector >=
 235             vts->vts_c_adt->cell_adr_table[i].last_sector )
 236         {
 237             hb_error( "scan: cell_adr_table[%d].start_sector (0x%x) "
 238                       "is not before last_sector (0x%x) - skipping title", i,
 239                       vts->vts_c_adt->cell_adr_table[i].start_sector,
 240                       vts->vts_c_adt->cell_adr_table[i].last_sector );
 241             goto fail;
 242         }
 243     }
 244
 245     if( global_verbosity_level == 3 )
 246     {
 247         ifo_print( d->reader, title->vts );
 248     }
 249
 250     /* Position of the title in the VTS */
 251     title->ttn = d->vmg->tt_srpt->title[t-1].vts_ttn;
 252     if ( title->ttn < 1 || title->ttn > vts->vts_ptt_srpt->nr_of_srpts )
 253     {
 254         hb_error( "invalid VTS PTT offset %d for title %d, skipping", title->ttn, t );
 255         goto fail;
 256     }
 257
 258     /* Get pgc */
 259     pgc_id = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgcn;
 260     if ( pgc_id < 1 || pgc_id > vts->vts_pgcit->nr_of_pgci_srp )
 261     {
 262         hb_error( "invalid PGC ID %d for title %d, skipping", pgc_id, t );
 263         goto fail;
 264     }
 265     pgn    = vts->vts_ptt_srpt->title[title->ttn-1].ptt[0].pgn;
 266     d->pgc = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc;
 267
 268     hb_log("pgc_id: %d, pgn: %d: pgc: %p", pgc_id, pgn, d->pgc);
 269
 270     if( !d->pgc )
 271     {
 272         hb_error( "scan: pgc not valid, skipping" );
 273         goto fail;
 274     }
 275
 276     if( pgn <= 0 || pgn > 99 )
 277     {
 278         hb_error( "scan: pgn %d not valid, skipping", pgn );
 279         goto fail;
 280     }
 281
 282     /* Start cell */
 283     title->cell_start  = d->pgc->program_map[pgn-1] - 1;
 284     title->block_start = d->pgc->cell_playback[title->cell_start].first_sector;
 285
 286     /* End cell */
 287     title->cell_end  = d->pgc->nr_of_cells - 1;
 288     title->block_end = d->pgc->cell_playback[title->cell_end].last_sector;
 289
 290     /* Block count */
 291     title->block_count = 0;
 292     d->cell_cur = title->cell_start;
 293     while( d->cell_cur <= title->cell_end )
 294     {
 295 #define cp d->pgc->cell_playback[d->cell_cur]
 296         title->block_count += cp.last_sector + 1 - cp.first_sector;
 297 #undef cp
 298         FindNextCell( d );
 299         d->cell_cur = d->cell_next;
 300     }
 301
 302     hb_log( "scan: vts=%d, ttn=%d, cells=%d->%d, blocks=%"PRIu64"->%"PRIu64", "
 303             "%"PRIu64" blocks", title->vts, title->ttn, title->cell_start,
 304             title->cell_end, title->block_start, title->block_end,
 305             title->block_count );
 306
 307     /* Get duration */
 308     title->duration = 90LL * dvdtime2msec( &d->pgc->playback_time );
 309     title->hours    = title->duration / 90000 / 3600;
 310     title->minutes  = ( ( title->duration / 90000 ) % 3600 ) / 60;
 311     title->seconds  = ( title->duration / 90000 ) % 60;
 312     hb_log( "scan: duration is %02d:%02d:%02d (%"PRId64" ms)",
 313             title->hours, title->minutes, title->seconds,
 314             title->duration / 90 );
 315
 316     /* ignore titles under 10 seconds because they're often stills or
 317      * clips with no audio & our preview code doesn't currently handle
 318      * either of these. */
 319     if( title->duration < min_duration )
 320     {
 321         hb_log( "scan: ignoring title (too short)" );
 322         goto fail;
 323     }
 324
 325     /* Detect languages */
 326     for( i = 0; i < vts->vtsi_mat->nr_of_vts_audio_streams; i++ )
 327     {
 328         hb_audio_t * audio, * audio_tmp;
 329         int          audio_format, lang_code, audio_control,
 330                      position, j;
 331         iso639_lang_t * lang;
 332         int lang_extension = 0;
 333
 334         hb_log( "scan: checking audio %d", i + 1 );
 335
 336         audio = calloc( sizeof( hb_audio_t ), 1 );
 337
 338         audio_format  = vts->vtsi_mat->vts_audio_attr[i].audio_format;
 339         lang_code     = vts->vtsi_mat->vts_audio_attr[i].lang_code;
 340         lang_extension = vts->vtsi_mat->vts_audio_attr[i].code_extension;
 341         audio_control =
 342             vts->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i];
 343
 344         if( !( audio_control & 0x8000 ) )
 345         {
 346             hb_log( "scan: audio channel is not active" );
 347             free( audio );
 348             continue;
 349         }
 350
 351         position = ( audio_control & 0x7F00 ) >> 8;
 352
 353         switch( audio_format )
 354         {
 355             case 0x00:
 356                 audio->id    = ( ( 0x80 + position ) << 8 ) | 0xbd;
 357                 audio->config.in.codec = HB_ACODEC_AC3;
 358                 break;
 359
 360             case 0x02:
 361             case 0x03:
 362                 audio->id    = 0xc0 + position;
 363                 audio->config.in.codec = HB_ACODEC_MPGA;
 364                 break;
 365
 366             case 0x04:
 367                 audio->id    = ( ( 0xa0 + position ) << 8 ) | 0xbd;
 368                 audio->config.in.codec = HB_ACODEC_LPCM;
 369                 break;
 370
 371             case 0x06:
 372                 audio->id    = ( ( 0x88 + position ) << 8 ) | 0xbd;
 373                 audio->config.in.codec = HB_ACODEC_DCA;
 374                 break;
 375
 376             default:
 377                 audio->id    = 0;
 378                 audio->config.in.codec = 0;
 379                 hb_log( "scan: unknown audio codec (%x)",
 380                         audio_format );
 381                 break;
 382         }
 383         if( !audio->id )
 384         {
 385             continue;
 386         }
 387
 388         /* Check for duplicate tracks */
 389         audio_tmp = NULL;
 390         for( j = 0; j < hb_list_count( title->list_audio ); j++ )
 391         {
 392             audio_tmp = hb_list_item( title->list_audio, j );
 393             if( audio->id == audio_tmp->id )
 394             {
 395                 break;
 396             }
 397             audio_tmp = NULL;
 398         }
 399         if( audio_tmp )
 400         {
 401             hb_log( "scan: duplicate audio track" );
 402             free( audio );
 403             continue;
 404         }
 405
 406         audio->config.lang.type = lang_extension;
 407
 408         lang = lang_for_code( vts->vtsi_mat->vts_audio_attr[i].lang_code );
 409
 410         snprintf( audio->config.lang.description, sizeof( audio->config.lang.description ), "%s (%s)",
 411             strlen(lang->native_name) ? lang->native_name : lang->eng_name,
 412             audio->config.in.codec == HB_ACODEC_AC3 ? "AC3" : ( audio->config.in.codec ==
 413                 HB_ACODEC_DCA ? "DTS" : ( audio->config.in.codec ==
 414                 HB_ACODEC_MPGA ? "MPEG" : "LPCM" ) ) );
 415         snprintf( audio->config.lang.simple, sizeof( audio->config.lang.simple ), "%s",
 416                   strlen(lang->native_name) ? lang->native_name : lang->eng_name );
 417         snprintf( audio->config.lang.iso639_2, sizeof( audio->config.lang.iso639_2 ), "%s",
 418                   lang->iso639_2);
 419
 420         switch( lang_extension )
 421         {
 422         case 0:
 423         case 1:
 424             break;
 425         case 2:
 426             strcat( audio->config.lang.description, " (Visually Impaired)" );
 427             break;
 428         case 3:
 429             strcat( audio->config.lang.description, " (Director's Commentary 1)" );
 430             break;
 431         case 4:
 432             strcat( audio->config.lang.description, " (Director's Commentary 2)" );
 433             break;
 434         default:
 435             break;
 436         }
 437
 438         hb_log( "scan: id=%x, lang=%s, 3cc=%s ext=%i", audio->id,
 439                 audio->config.lang.description, audio->config.lang.iso639_2,
 440                 lang_extension );
 441
 442         audio->config.in.track = i;
 443         hb_list_add( title->list_audio, audio );
 444     }
 445
 446     /* Check for subtitles */
 447     for( i = 0; i < vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
 448     {
 449         hb_subtitle_t * subtitle;
 450         int spu_control;
 451         int position;
 452         iso639_lang_t * lang;
 453         int lang_extension = 0;
 454
 455         hb_log( "scan: checking subtitle %d", i + 1 );
 456
 457         spu_control =
 458             vts->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i];
 459
 460         if( !( spu_control & 0x80000000 ) )
 461         {
 462             hb_log( "scan: subtitle channel is not active" );
 463             continue;
 464         }
 465
 466         if( vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
 467         {
 468             switch( vts->vtsi_mat->vts_video_attr.permitted_df )
 469             {
 470                 case 1:
 471                     position = spu_control & 0xFF;
 472                     break;
 473                 case 2:
 474                     position = ( spu_control >> 8 ) & 0xFF;
 475                     break;
 476                 default:
 477                     position = ( spu_control >> 16 ) & 0xFF;
 478             }
 479         }
 480         else
 481         {
 482             position = ( spu_control >> 24 ) & 0x7F;
 483         }
 484
 485         lang_extension = vts->vtsi_mat->vts_subp_attr[i].code_extension;
 486
 487         lang = lang_for_code( vts->vtsi_mat->vts_subp_attr[i].lang_code );
 488
 489         subtitle = calloc( sizeof( hb_subtitle_t ), 1 );
 490         subtitle->track = i+1;
 491         subtitle->id = ( ( 0x20 + position ) << 8 ) | 0xbd;
 492         snprintf( subtitle->lang, sizeof( subtitle->lang ), "%s",
 493              strlen(lang->native_name) ? lang->native_name : lang->eng_name);
 494         snprintf( subtitle->iso639_2, sizeof( subtitle->iso639_2 ), "%s",
 495                   lang->iso639_2);
 496         subtitle->format = PICTURESUB;
 497         subtitle->source = VOBSUB;
 498         subtitle->config.dest   = RENDERSUB;  // By default render (burn-in) the VOBSUB.
 499
 500         subtitle->type = lang_extension;
 501
 502         memcpy( subtitle->palette,
 503             vts->vts_pgcit->pgci_srp[pgc_id-1].pgc->palette,
 504             16 * sizeof( uint32_t ) );
 505
 506         switch( lang_extension )
 507         {
 508         case 0:
 509             break;
 510         case 1:
 511             break;
 512         case 2:
 513             strcat( subtitle->lang, " (Caption with bigger size character)");
 514             break;
 515         case 3:
 516             strcat( subtitle->lang, " (Caption for Children)");
 517             break;
 518         case 4:
 519             break;
 520         case 5:
 521             strcat( subtitle->lang, " (Closed Caption)");
 522             break;
 523         case 6:
 524             strcat( subtitle->lang, " (Closed Caption with bigger size character)");
 525             break;
 526         case 7:
 527             strcat( subtitle->lang, " (Closed Caption for Children)");
 528             break;
 529         case 8:
 530             break;
 531         case 9:
 532             strcat( subtitle->lang, " (Forced Caption)");
 533             break;
 534         case 10:
 535             break;
 536         case 11:
 537             break;
 538         case 12:
 539             break;
 540         case 13:
 541             strcat( subtitle->lang, " (Director's Commentary)");
 542             break;
 543         case 14:
 544             strcat( subtitle->lang, " (Director's Commentary with bigger size character)");
 545             break;
 546         case 15:
 547             strcat( subtitle->lang, " (Director's Commentary for Children)");
 548         default:
 549             break;
 550         }
 551
 552         hb_log( "scan: id=%x, lang=%s, 3cc=%s", subtitle->id,
 553                 subtitle->lang, subtitle->iso639_2 );
 554
 555         hb_list_add( title->list_subtitle, subtitle );
 556     }
 557
 558     /* Chapters */
 559     hb_log( "scan: title %d has %d chapters", t,
 560             vts->vts_ptt_srpt->title[title->ttn-1].nr_of_ptts );
 561     for( i = 0, c = 1;
 562          i < vts->vts_ptt_srpt->title[title->ttn-1].nr_of_ptts; i++ )
 563     {
 564         chapter = calloc( sizeof( hb_chapter_t ), 1 );
 565         /* remember the on-disc chapter number */
 566         chapter->index = i + 1;
 567
 568         pgc_id = vts->vts_ptt_srpt->title[title->ttn-1].ptt[i].pgcn;
 569         pgn    = vts->vts_ptt_srpt->title[title->ttn-1].ptt[i].pgn;
 570         d->pgc = vts->vts_pgcit->pgci_srp[pgc_id-1].pgc;
 571
 572         /* Start cell */
 573         chapter->cell_start  = d->pgc->program_map[pgn-1] - 1;
 574         chapter->block_start =
 575             d->pgc->cell_playback[chapter->cell_start].first_sector;
 576
 577         // if there are no more programs in this pgc, the end cell is the
 578         // last cell. Otherwise it's the cell before the start cell of the
 579         // next program.
 580         if ( pgn == d->pgc->nr_of_programs )
 581         {
 582             chapter->cell_end = d->pgc->nr_of_cells - 1;
 583         }
 584         else
 585         {
 586             chapter->cell_end = d->pgc->program_map[pgn] - 2;;
 587         }
 588         chapter->block_end = d->pgc->cell_playback[chapter->cell_end].last_sector;
 589
 590         /* Block count, duration */
 591         chapter->block_count = 0;
 592         chapter->duration = 0;
 593
 594         d->cell_cur = chapter->cell_start;
 595         while( d->cell_cur <= chapter->cell_end )
 596         {
 597 #define cp d->pgc->cell_playback[d->cell_cur]
 598             chapter->block_count += cp.last_sector + 1 - cp.first_sector;
 599             chapter->duration += 90LL * dvdtime2msec( &cp.playback_time );
 600 #undef cp
 601             FindNextCell( d );
 602             d->cell_cur = d->cell_next;
 603         }
 604         hb_list_add( title->list_chapter, chapter );
 605         c++;
 606     }
 607
 608     /* The durations we get for chapters aren't precise. Scale them so
 609        the total matches the title duration */
 610     duration = 0;
 611     for( i = 0; i < hb_list_count( title->list_chapter ); i++ )
 612     {
 613         chapter = hb_list_item( title->list_chapter, i );
 614         duration += chapter->duration;
 615     }
 616     duration_correction = (float) title->duration / (float) duration;
 617     for( i = 0; i < hb_list_count( title->list_chapter ); i++ )
 618     {
 619         int seconds;
 620         chapter            = hb_list_item( title->list_chapter, i );
 621         chapter->duration  = duration_correction * chapter->duration;
 622         seconds            = ( chapter->duration + 45000 ) / 90000;
 623         chapter->hours     = seconds / 3600;
 624         chapter->minutes   = ( seconds % 3600 ) / 60;
 625         chapter->seconds   = seconds % 60;
 626
 627         hb_log( "scan: chap %d c=%d->%d, b=%"PRIu64"->%"PRIu64" (%"PRIu64"), %"PRId64" ms",
 628                 chapter->index, chapter->cell_start, chapter->cell_end,
 629                 chapter->block_start, chapter->block_end,
 630                 chapter->block_count, chapter->duration / 90 );
 631     }
 632
 633     /* Get aspect. We don't get width/height/rate infos here as
 634        they tend to be wrong */
 635     switch( vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
 636     {
 637         case 0:
 638             title->container_aspect = 4. / 3.;
 639             break;
 640         case 3:
 641             title->container_aspect = 16. / 9.;
 642             break;
 643         default:
 644             hb_log( "scan: unknown aspect" );
 645             goto fail;
 646     }
 647
 648     hb_log( "scan: aspect = %g", title->aspect );
 649
 650     /* This title is ok so far */
 651     goto cleanup;
 652
 653 fail:
 654     hb_list_close( &title->list_audio );
 655     free( title );
 656     title = NULL;
 657
 658 cleanup:
 659     if( vts ) ifoClose( vts );
 660
 661     return title;
 662 }
 663
 664 /***********************************************************************
 665  * hb_dvdread_start
 666  ***********************************************************************
 667  * Title and chapter start at 1
 668  **********************************************************************/
 669 static int hb_dvdread_start( hb_dvd_t * e, hb_title_t *title, int chapter )
 670 {
 671     hb_dvdread_t *d = &(e->dvdread);
 672     int pgc_id, pgn;
 673     int i;
 674     int t = title->index;
 675
 676     /* Open the IFO and the VOBs for this title */
 677     d->vts = d->vmg->tt_srpt->title[t-1].title_set_nr;
 678     d->ttn = d->vmg->tt_srpt->title[t-1].vts_ttn;
 679     if( !( d->ifo = ifoOpen( d->reader, d->vts ) ) )
 680     {
 681         hb_error( "dvd: ifoOpen failed for VTS %d", d->vts );
 682         return 0;
 683     }
 684     if( !( d->file = DVDOpenFile( d->reader, d->vts,
 685                                   DVD_READ_TITLE_VOBS ) ) )
 686     {
 687         hb_error( "dvd: DVDOpenFile failed for VTS %d", d->vts );
 688         return 0;
 689     }
 690
 691     /* Get title first and last blocks */
 692     pgc_id         = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[0].pgcn;
 693     pgn            = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[0].pgn;
 694     d->pgc         = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc;
 695     d->cell_start  = d->pgc->program_map[pgn - 1] - 1;
 696     d->cell_end    = d->pgc->nr_of_cells - 1;
 697     d->title_start = d->pgc->cell_playback[d->cell_start].first_sector;
 698     d->title_end   = d->pgc->cell_playback[d->cell_end].last_sector;
 699
 700     /* Block count */
 701     d->title_block_count = 0;
 702     for( i = d->cell_start; i <= d->cell_end; i++ )
 703     {
 704         d->title_block_count += d->pgc->cell_playback[i].last_sector + 1 -
 705             d->pgc->cell_playback[i].first_sector;
 706     }
 707
 708     /* Get pgc for the current chapter */
 709     pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[chapter-1].pgcn;
 710     pgn    = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[chapter-1].pgn;
 711     d->pgc = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc;
 712
 713     /* Get the two first cells */
 714     d->cell_cur = d->pgc->program_map[pgn-1] - 1;
 715     FindNextCell( d );
 716
 717     d->block     = d->pgc->cell_playback[d->cell_cur].first_sector;
 718     d->next_vobu = d->block;
 719     d->pack_len  = 0;
 720     d->cell_overlap = 0;
 721     d->in_cell = 0;
 722     d->in_sync = 2;
 723
 724     return 1;
 725 }
 726
 727 /***********************************************************************
 728  * hb_dvdread_stop
 729  ***********************************************************************
 730  *
 731  **********************************************************************/
 732 static void hb_dvdread_stop( hb_dvd_t * e )
 733 {
 734     hb_dvdread_t *d = &(e->dvdread);
 735     if( d->ifo )
 736     {
 737         ifoClose( d->ifo );
 738         d->ifo = NULL;
 739     }
 740     if( d->file )
 741     {
 742         DVDCloseFile( d->file );
 743         d->file = NULL;
 744     }
 745 }
 746
 747 /***********************************************************************
 748  * hb_dvdread_seek
 749  ***********************************************************************
 750  *
 751  **********************************************************************/
 752 static int hb_dvdread_seek( hb_dvd_t * e, float f )
 753 {
 754     hb_dvdread_t *d = &(e->dvdread);
 755     int count, sizeCell;
 756     int i;
 757
 758     count = f * d->title_block_count;
 759
 760     for( i = d->cell_start; i <= d->cell_end; i++ )
 761     {
 762         sizeCell = d->pgc->cell_playback[i].last_sector + 1 -
 763             d->pgc->cell_playback[i].first_sector;
 764
 765         if( count < sizeCell )
 766         {
 767             d->cell_cur = i;
 768             d->cur_cell_id = 0;
 769             FindNextCell( d );
 770
 771             /* Now let hb_dvdread_read find the next VOBU */
 772             d->next_vobu = d->pgc->cell_playback[i].first_sector + count;
 773             d->pack_len  = 0;
 774             break;
 775         }
 776
 777         count -= sizeCell;
 778     }
 779
 780     if( i > d->cell_end )
 781     {
 782         return 0;
 783     }
 784
 785     /*
 786      * Assume that we are in sync, even if we are not given that it is obvious
 787      * that we are out of sync if we have just done a seek.
 788      */
 789     d->in_sync = 2;
 790
 791     return 1;
 792 }
 793
 794
 795 /***********************************************************************
 796  * is_nav_pack
 797  ***********************************************************************/
 798 int is_nav_pack( unsigned char *buf )
 799 {
 800     /*
 801      * The NAV Pack is comprised of the PCI Packet and DSI Packet, both
 802      * of these start at known offsets and start with a special identifier.
 803      *
 804      * NAV = {
 805      *  PCI = { 00 00 01 bf  # private stream header
 806      *          ?? ??        # length
 807      *          00           # substream
 808      *          ...
 809      *        }
 810      *  DSI = { 00 00 01 bf  # private stream header
 811      *          ?? ??        # length
 812      *          01           # substream
 813      *          ...
 814      *        }
 815      *
 816      * The PCI starts at offset 0x26 into the sector, and the DSI starts at 0x400
 817      *
 818      * This information from: http://dvd.sourceforge.net/dvdinfo/
 819      */
 820     if( ( buf[0x26] == 0x00 &&      // PCI
 821           buf[0x27] == 0x00 &&
 822           buf[0x28] == 0x01 &&
 823           buf[0x29] == 0xbf &&
 824           buf[0x2c] == 0x00 ) &&
 825         ( buf[0x400] == 0x00 &&     // DSI
 826           buf[0x401] == 0x00 &&
 827           buf[0x402] == 0x01 &&
 828           buf[0x403] == 0xbf &&
 829           buf[0x406] == 0x01 ) )
 830     {
 831         return ( 1 );
 832     } else {
 833         return ( 0 );
 834     }
 835 }
 836
 837
 838 /***********************************************************************
 839  * hb_dvdread_read
 840  ***********************************************************************
 841  *
 842  **********************************************************************/
 843 static int hb_dvdread_read( hb_dvd_t * e, hb_buffer_t * b )
 844 {
 845     hb_dvdread_t *d = &(e->dvdread);
 846  top:
 847     if( !d->pack_len )
 848     {
 849         /* New pack */
 850         dsi_t dsi_pack;
 851         int   error = 0;
 852
 853         // if we've just finished the last cell of the title we don't
 854         // want to read another block because our next_vobu pointer
 855         // is probably invalid. Just return 'no data' & our caller
 856         // should check and discover we're at eof.
 857         if ( d->cell_cur > d->cell_end )
 858             return 0;
 859
 860         for( ;; )
 861         {
 862             int block, pack_len, next_vobu, read_retry;
 863
 864             for( read_retry = 1; read_retry < 1024; read_retry++ )
 865             {
 866                 if( DVDReadBlocks( d->file, d->next_vobu, 1, b->data ) == 1 )
 867                 {
 868                     /*
 869                      * Successful read.
 870                      */
 871                     if( read_retry > 1 && !is_nav_pack( b->data) )
 872                     {
 873                         // But wasn't a nav pack, so carry on looking
 874                         read_retry = 1;
 875                         d->next_vobu++;
 876                         continue;
 877                     }
 878                     break;
 879                 } else {
 880                     // First retry the same block, then try the next one,
 881                     // adjust the skip increment upwards so that we can skip
 882                     // large sections of bad blocks more efficiently (at the
 883                     // cost of some missed good blocks at the end).
 884                     hb_log( "dvd: vobu read error blk %d - skipping to next blk incr %d",
 885                             d->next_vobu, (read_retry * 10));
 886                     d->next_vobu += (read_retry * 10);
 887                 }
 888
 889             }
 890
 891             if( read_retry == 1024 )
 892             {
 893                 // That's too many bad blocks, jump to the start of the
 894                 // next cell.
 895                 hb_log( "dvd: vobu read error blk %d - skipping to cell %d",
 896                         d->next_vobu, d->cell_next );
 897                 d->cell_cur  = d->cell_next;
 898                 if ( d->cell_cur > d->cell_end )
 899                     return 0;
 900                 d->in_cell = 0;
 901                 d->next_vobu = d->pgc->cell_playback[d->cell_cur].first_sector;
 902                 FindNextCell( d );
 903                 d->cell_overlap = 1;
 904                 continue;
 905             }
 906
 907             if ( !is_nav_pack( b->data ) ) {
 908                 (d->next_vobu)++;
 909                 if( d->in_sync == 1 ) {
 910                     hb_log("dvd: Lost sync, searching for NAV pack at blk %d",
 911                            d->next_vobu);
 912                     d->in_sync = 0;
 913                 }
 914                 continue;
 915             }
 916
 917             navRead_DSI( &dsi_pack, &b->data[DSI_START_BYTE] );
 918
 919             if ( d->in_sync == 0 && d->cur_cell_id &&
 920                  (d->cur_vob_id != dsi_pack.dsi_gi.vobu_vob_idn ||
 921                   d->cur_cell_id != dsi_pack.dsi_gi.vobu_c_idn ) )
 922             {
 923                 // We walked out of the cell we're supposed to be in.
 924                 // If we're not at the start of our next cell go there.
 925                 hb_log("dvd: left cell %d (%u,%u) for (%u,%u) at block %u",
 926                        d->cell_cur, d->cur_vob_id, d->cur_cell_id,
 927                        dsi_pack.dsi_gi.vobu_vob_idn, dsi_pack.dsi_gi.vobu_c_idn,
 928                        d->next_vobu );
 929                 if ( d->next_vobu != d->pgc->cell_playback[d->cell_next].first_sector )
 930                 {
 931                     d->next_vobu = d->pgc->cell_playback[d->cell_next].first_sector;
 932                     d->cur_cell_id = 0;
 933                     continue;
 934                 }
 935             }
 936
 937             block     = dsi_pack.dsi_gi.nv_pck_lbn;
 938             pack_len  = dsi_pack.dsi_gi.vobu_ea;
 939
 940             // There are a total of 21 next vobu offsets (and 21 prev_vobu
 941             // offsets) in the navpack SRI structure. The primary one is
 942             // 'next_vobu' which is the offset (in dvd blocks) from the current
 943             // block to the start of the next vobu. If the block at 'next_vobu'
 944             // can't be read, 'next_video' is the offset to the vobu closest to it.
 945             // The other 19 offsets are vobus at successively longer distances from
 946             // the current block (this is so that a hardware player can do
 947             // adaptive error recovery to skip over a bad spot on the disk). In all
 948             // these offsets the high bit is set to indicate when it contains a
 949             // valid offset. The next bit (2^30) is set to indicate that there's
 950             // another valid offset in the SRI that's closer to the current block.
 951             // A hardware player uses these bits to chose the closest valid offset
 952             // and uses that as its next vobu. (Some mastering schemes appear to
 953             // put a bogus offset in next_vobu with the 2^30 bit set & the
 954             // correct offset in next_video. This works fine in hardware players
 955             // but will mess up software that doesn't implement the full next
 956             // vobu decision logic.) In addition to the flag bits there's a
 957             // reserved value of the offset that indicates 'no next vobu' (which
 958             // indicates the end of a cell). But having no next vobu pointer with a
 959             // 'valid' bit set also indicates end of cell. Different mastering
 960             // schemes seem to use all possible combinations of the flag bits
 961             // and reserved values to indicate end of cell so we have to check
 962             // them all or we'll get a disk read error from following an
 963             // invalid offset.
 964             uint32_t next_ptr = dsi_pack.vobu_sri.next_vobu;
 965             if ( ( next_ptr & ( 1 << 31 ) ) == 0  ||
 966                  ( next_ptr & ( 1 << 30 ) ) != 0 ||
 967                  ( next_ptr & 0x3fffffff ) == 0x3fffffff )
 968             {
 969                 next_ptr = dsi_pack.vobu_sri.next_video;
 970                 if ( ( next_ptr & ( 1 << 31 ) ) == 0 ||
 971                      ( next_ptr & 0x3fffffff ) == 0x3fffffff )
 972                 {
 973                     // don't have a valid forward pointer - assume end-of-cell
 974                     d->block     = block;
 975                     d->pack_len  = pack_len;
 976                     break;
 977                 }
 978             }
 979             next_vobu = block + ( next_ptr & 0x3fffffff );
 980
 981             if( pack_len >  0    &&
 982                 pack_len <  1024 &&
 983                 block    >= d->next_vobu &&
 984                 ( block <= d->title_start + d->title_block_count ||
 985                   block <= d->title_end ) )
 986             {
 987                 d->block     = block;
 988                 d->pack_len  = pack_len;
 989                 d->next_vobu = next_vobu;
 990                 break;
 991             }
 992
 993             /* Wasn't a valid VOBU, try next block */
 994             if( ++error > 1024 )
 995             {
 996                 hb_log( "dvd: couldn't find a VOBU after 1024 blocks" );
 997                 return 0;
 998             }
 999
1000             (d->next_vobu)++;
1001         }
1002
1003         if( d->in_sync == 0 || d->in_sync == 2 )
1004         {
1005             if( d->in_sync == 0 )
1006             {
1007                 hb_log( "dvd: In sync with DVD at block %d", d->block );
1008             }
1009             d->in_sync = 1;
1010         }
1011
1012         // Revert the cell overlap, and check for a chapter break
1013         // If this cell is zero length (prev_vobu & next_vobu both
1014         // set to END_OF_CELL) we need to check for beginning of
1015         // cell before checking for end or we'll advance to the next
1016         // cell too early and fail to generate a chapter mark when this
1017         // cell starts a chapter.
1018         if( ( dsi_pack.vobu_sri.prev_vobu & (1 << 31 ) ) == 0 ||
1019             ( dsi_pack.vobu_sri.prev_vobu & 0x3fffffff ) == 0x3fffffff )
1020         {
1021             // A vobu that's not at the start of a cell can have an
1022             // EOC prev pointer (this seems to be associated with some
1023             // sort of drm). The rest of the content in the cell may be
1024             // booby-trapped so treat this like an end-of-cell rather
1025             // than a beginning of cell.
1026             if ( d->pgc->cell_playback[d->cell_cur].first_sector < dsi_pack.dsi_gi.nv_pck_lbn &&
1027                  d->pgc->cell_playback[d->cell_cur].last_sector >= dsi_pack.dsi_gi.nv_pck_lbn )
1028             {
1029                 hb_log( "dvd: null prev_vobu in cell %d at block %d", d->cell_cur,
1030                         d->block );
1031                 // treat like end-of-cell then go directly to start of next cell.
1032                 d->cell_cur  = d->cell_next;
1033                 d->in_cell = 0;
1034                 d->next_vobu = d->pgc->cell_playback[d->cell_cur].first_sector;
1035                 FindNextCell( d );
1036                 d->cell_overlap = 1;
1037                 goto top;
1038             }
1039             else
1040             {
1041                 if ( d->block != d->pgc->cell_playback[d->cell_cur].first_sector )
1042                 {
1043                     hb_log( "dvd: beginning of cell %d at block %d", d->cell_cur,
1044                            d->block );
1045                 }
1046                 if( d->in_cell )
1047                 {
1048                     hb_error( "dvd: assuming missed end of cell %d at block %d", d->cell_cur, d->block );
1049                     d->cell_cur  = d->cell_next;
1050                     d->next_vobu = d->pgc->cell_playback[d->cell_cur].first_sector;
1051                     FindNextCell( d );
1052                     d->cell_overlap = 1;
1053                     d->in_cell = 0;
1054                 } else {
1055                     d->in_cell = 1;
1056                 }
1057                 d->cur_vob_id = dsi_pack.dsi_gi.vobu_vob_idn;
1058                 d->cur_cell_id = dsi_pack.dsi_gi.vobu_c_idn;
1059
1060                 if( d->cell_overlap )
1061                 {
1062                     b->new_chap = hb_dvdread_is_break( d );
1063                     d->cell_overlap = 0;
1064                 }
1065             }
1066         }
1067
1068         if( ( dsi_pack.vobu_sri.next_vobu & (1 << 31 ) ) == 0 ||
1069             ( dsi_pack.vobu_sri.next_vobu & 0x3fffffff ) == 0x3fffffff )
1070         {
1071             if ( d->block <= d->pgc->cell_playback[d->cell_cur].first_sector ||
1072                  d->block > d->pgc->cell_playback[d->cell_cur].last_sector )
1073             {
1074                 hb_log( "dvd: end of cell %d at block %d", d->cell_cur,
1075                         d->block );
1076             }
1077             d->cell_cur  = d->cell_next;
1078             d->in_cell = 0;
1079             d->next_vobu = d->pgc->cell_playback[d->cell_cur].first_sector;
1080             FindNextCell( d );
1081             d->cell_overlap = 1;
1082
1083         }
1084     }
1085     else
1086     {
1087         if( DVDReadBlocks( d->file, d->block, 1, b->data ) != 1 )
1088         {
1089             // this may be a real DVD error or may be DRM. Either way
1090             // we don't want to quit because of one bad block so set
1091             // things up so we'll advance to the next vobu and recurse.
1092             hb_error( "dvd: DVDReadBlocks failed (%d), skipping to vobu %u",
1093                       d->block, d->next_vobu );
1094             d->pack_len = 0;
1095             goto top;  /* XXX need to restructure this routine & avoid goto */
1096         }
1097         d->pack_len--;
1098     }
1099
1100     d->block++;
1101
1102     return 1;
1103 }
1104
1105 /***********************************************************************
1106  * hb_dvdread_chapter
1107  ***********************************************************************
1108  * Returns in which chapter the next block to be read is.
1109  * Chapter numbers start at 1.
1110  **********************************************************************/
1111 static int hb_dvdread_chapter( hb_dvd_t * e )
1112 {
1113     hb_dvdread_t *d = &(e->dvdread);
1114     int     i;
1115     int     pgc_id, pgn;
1116     int     nr_of_ptts = d->ifo->vts_ptt_srpt->title[d->ttn-1].nr_of_ptts;
1117     pgc_t * pgc;
1118
1119     for( i = nr_of_ptts - 1;
1120          i >= 0;
1121          i-- )
1122     {
1123         /* Get pgc for chapter (i+1) */
1124         pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgcn;
1125         pgn    = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgn;
1126         pgc    = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc;
1127
1128         if( d->cell_cur - d->cell_overlap >= pgc->program_map[pgn-1] - 1 &&
1129             d->cell_cur - d->cell_overlap <= pgc->nr_of_cells - 1 )
1130         {
1131             /* We are in this chapter */
1132             return i + 1;
1133         }
1134     }
1135
1136     /* End of title */
1137     return -1;
1138 }
1139
1140 /***********************************************************************
1141  * hb_dvdread_is_break
1142  ***********************************************************************
1143  * Returns chapter number if the current block is a new chapter start
1144  **********************************************************************/
1145 static int hb_dvdread_is_break( hb_dvdread_t * d )
1146 {
1147     int     i;
1148     int     pgc_id, pgn;
1149     int     nr_of_ptts = d->ifo->vts_ptt_srpt->title[d->ttn-1].nr_of_ptts;
1150     pgc_t * pgc;
1151     int     cell;
1152
1153     for( i = nr_of_ptts - 1;
1154          i > 0;
1155          i-- )
1156     {
1157         /* Get pgc for chapter (i+1) */
1158         pgc_id = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgcn;
1159         pgn    = d->ifo->vts_ptt_srpt->title[d->ttn-1].ptt[i].pgn;
1160         pgc    = d->ifo->vts_pgcit->pgci_srp[pgc_id-1].pgc;
1161         cell   = pgc->program_map[pgn-1] - 1;
1162
1163         if( cell <= d->cell_start )
1164             break;
1165
1166         // This must not match against the start cell.
1167         if( pgc->cell_playback[cell].first_sector == d->block && cell != d->cell_start )
1168         {
1169             return i + 1;
1170         }
1171     }
1172
1173     return 0;
1174 }
1175
1176 /***********************************************************************
1177  * hb_dvdread_close
1178  ***********************************************************************
1179  * Closes and frees everything
1180  **********************************************************************/
1181 static void hb_dvdread_close( hb_dvd_t ** _d )
1182 {
1183     hb_dvdread_t * d = &((*_d)->dvdread);
1184
1185     if( d->vmg )
1186     {
1187         ifoClose( d->vmg );
1188     }
1189     if( d->reader )
1190     {
1191         DVDClose( d->reader );
1192     }
1193
1194     free( d );
1195     *_d = NULL;
1196 }
1197
1198 /***********************************************************************
1199  * hb_dvdread_angle_count
1200  ***********************************************************************
1201  * Returns the number of angles supported.  We do not support angles
1202  * with dvdread
1203  **********************************************************************/
1204 static int hb_dvdread_angle_count( hb_dvd_t * d )
1205 {
1206     return 1;
1207 }
1208
1209 /***********************************************************************
1210  * hb_dvdread_set_angle
1211  ***********************************************************************
1212  * Sets the angle to read.  Not supported with dvdread
1213  **********************************************************************/
1214 static void hb_dvdread_set_angle( hb_dvd_t * d, int angle )
1215 {
1216 }
1217
1218 /***********************************************************************
1219  * FindNextCell
1220  ***********************************************************************
1221  * Assumes pgc and cell_cur are correctly set, and sets cell_next to the
1222  * cell to be read when we will be done with cell_cur.
1223  **********************************************************************/
1224 static void FindNextCell( hb_dvdread_t * d )
1225 {
1226     int i = 0;
1227
1228     if( d->pgc->cell_playback[d->cell_cur].block_type ==
1229             BLOCK_TYPE_ANGLE_BLOCK )
1230     {
1231
1232         while( d->pgc->cell_playback[d->cell_cur+i].block_mode !=
1233                    BLOCK_MODE_LAST_CELL )
1234         {
1235              i++;
1236         }
1237         d->cell_next = d->cell_cur + i + 1;
1238         hb_log( "dvd: Skipping multi-angle cells %d-%d",
1239                 d->cell_cur,
1240                 d->cell_next - 1 );
1241     }
1242     else
1243     {
1244         d->cell_next = d->cell_cur + 1;
1245     }
1246 }
1247
1248 /***********************************************************************
1249  * dvdtime2msec
1250  ***********************************************************************
1251  * From lsdvd
1252  **********************************************************************/
1253 static int dvdtime2msec(dvd_time_t * dt)
1254 {
1255     double frames_per_s[4] = {-1.0, 25.00, -1.0, 29.97};
1256     double fps = frames_per_s[(dt->frame_u & 0xc0) >> 6];
1257     long   ms;
1258     ms  = (((dt->hour &   0xf0) >> 3) * 5 + (dt->hour   & 0x0f)) * 3600000;
1259     ms += (((dt->minute & 0xf0) >> 3) * 5 + (dt->minute & 0x0f)) * 60000;
1260     ms += (((dt->second & 0xf0) >> 3) * 5 + (dt->second & 0x0f)) * 1000;
1261
1262     if( fps > 0 )
1263     {
1264         ms += ((dt->frame_u & 0x30) >> 3) * 5 +
1265               (dt->frame_u & 0x0f) * 1000.0 / fps;
1266     }
1267
1268     return ms;
1269 }
1270
1271 char * hb_dvd_name( char * path )
1272 {
1273     return dvd_methods->name(path);
1274 }
1275
1276 hb_dvd_t * hb_dvd_init( char * path )
1277 {
1278     return dvd_methods->init(path);
1279 }
1280
1281 int hb_dvd_title_count( hb_dvd_t * d )
1282 {
1283     return dvd_methods->title_count(d);
1284 }
1285
1286 hb_title_t * hb_dvd_title_scan( hb_dvd_t * d, int t, uint64_t min_duration )
1287 {
1288     return dvd_methods->title_scan(d, t, min_duration);
1289 }
1290
1291 int hb_dvd_start( hb_dvd_t * d, hb_title_t *title, int chapter )
1292 {
1293     return dvd_methods->start(d, title, chapter);
1294 }
1295
1296 void hb_dvd_stop( hb_dvd_t * d )
1297 {
1298     dvd_methods->stop(d);
1299 }
1300
1301 int hb_dvd_seek( hb_dvd_t * d, float f )
1302 {
1303     return dvd_methods->seek(d, f);
1304 }
1305
1306 int hb_dvd_read( hb_dvd_t * d, hb_buffer_t * b )
1307 {
1308     return dvd_methods->read(d, b);
1309 }
1310
1311 int hb_dvd_chapter( hb_dvd_t * d )
1312 {
1313     return dvd_methods->chapter(d);
1314 }
1315
1316 void hb_dvd_close( hb_dvd_t ** _d )
1317 {
1318     dvd_methods->close(_d);
1319 }
1320
1321 int hb_dvd_angle_count( hb_dvd_t * d )
1322 {
1323     return dvd_methods->angle_count(d);
1324 }
1325
1326 void hb_dvd_set_angle( hb_dvd_t * d, int angle )
1327 {
1328     dvd_methods->set_angle(d, angle);
1329 }
1330
1331 int hb_dvd_main_feature( hb_dvd_t * d, hb_list_t * list_title )
1332 {
1333     return dvd_methods->main_feature(d, list_title);
1334 }
1335
1336 // hb_dvd_set_dvdnav must only be called when no dvd source is open
1337 // it rips the rug out from under things so be careful
1338 void hb_dvd_set_dvdnav( int enable )
1339 {
1340     if (enable)
1341         dvd_methods = hb_dvdnav_methods();
1342     else
1343         dvd_methods = hb_dvdread_methods();
1344 }
1345