git.sesse.net Git - vlc/blob - modules/demux/vobsub.c

   1 /*****************************************************************************
   2  * subtitle.c: Demux vobsub files.
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Derk-Jan Hartman <hartman at videolan dot org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc/vlc.h>
  33
  34 #include <errno.h>
  35 #include <sys/types.h>
  36
  37 #include <vlc_demux.h>
  38 #include <vlc_charset.h>
  39
  40 #include "ps.h"
  41
  42 #define MAX_LINE 8192
  43
  44 /*****************************************************************************
  45  * Module descriptor
  46  *****************************************************************************/
  47 static int  Open ( vlc_object_t *p_this );
  48 static void Close( vlc_object_t *p_this );
  49
  50 vlc_module_begin();
  51     set_description( _("Vobsub subtitles parser") );
  52     set_category( CAT_INPUT );
  53     set_subcategory( SUBCAT_INPUT_DEMUX );
  54     set_capability( "demux2", 1 );
  55
  56     set_callbacks( Open, Close );
  57
  58     add_shortcut( "vobsub" );
  59     add_shortcut( "subtitle" );
  60 vlc_module_end();
  61
  62 /*****************************************************************************
  63  * Prototypes:
  64  *****************************************************************************/
  65
  66 typedef struct
  67 {
  68     int     i_line_count;
  69     int     i_line;
  70     char    **line;
  71 } text_t;
  72 static int  TextLoad( text_t *, stream_t *s );
  73 static void TextUnload( text_t * );
  74
  75 typedef struct
  76 {
  77     int64_t i_start;
  78     int     i_vobsub_location;
  79 } subtitle_t;
  80
  81 typedef struct
  82 {
  83     es_format_t fmt;
  84     es_out_id_t *p_es;
  85     int         i_track_id;
  86
  87     int         i_current_subtitle;
  88     int         i_subtitles;
  89     subtitle_t  *p_subtitles;
  90
  91     int64_t     i_delay;
  92 } vobsub_track_t;
  93
  94 struct demux_sys_t
  95 {
  96     int64_t     i_next_demux_date;
  97     int64_t     i_length;
  98
  99     text_t      txt;
 100     stream_t    *p_vobsub_stream;
 101
 102     /* all tracks */
 103     int            i_tracks;
 104     vobsub_track_t *track;
 105
 106     int         i_original_frame_width;
 107     int         i_original_frame_height;
 108     vlc_bool_t  b_palette;
 109     uint32_t    palette[16];
 110 };
 111
 112 static int Demux( demux_t * );
 113 static int Control( demux_t *, int, va_list );
 114
 115 static int ParseVobSubIDX( demux_t * );
 116 static int DemuxVobSub( demux_t *, block_t *);
 117
 118 /*****************************************************************************
 119  * Module initializer
 120  *****************************************************************************/
 121 static int Open ( vlc_object_t *p_this )
 122 {
 123     demux_t     *p_demux = (demux_t*)p_this;
 124     demux_sys_t *p_sys;
 125     char *psz_vobname, *s;
 126     int i_len;
 127
 128     if( ( s = stream_ReadLine( p_demux->s ) ) != NULL )
 129     {
 130         if( !strcasestr( s, "# VobSub index file" ) )
 131         {
 132             msg_Dbg( p_demux, "this doesn't seem to be a vobsub file" );
 133             free( s );
 134             if( stream_Seek( p_demux->s, 0 ) )
 135             {
 136                 msg_Warn( p_demux, "failed to rewind" );
 137             }
 138             return VLC_EGENERIC;
 139         }
 140         free( s );
 141
 142     }
 143     else
 144     {
 145         msg_Dbg( p_demux, "could not read vobsub IDX file" );
 146         return VLC_EGENERIC;
 147     }
 148
 149     p_demux->pf_demux = Demux;
 150     p_demux->pf_control = Control;
 151     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 152     p_sys->i_length = 0;
 153     p_sys->p_vobsub_stream = NULL;
 154     p_sys->i_tracks = 0;
 155     p_sys->track = (vobsub_track_t *)malloc( sizeof( vobsub_track_t ) );
 156     p_sys->i_original_frame_width = -1;
 157     p_sys->i_original_frame_height = -1;
 158     p_sys->b_palette = VLC_FALSE;
 159     memset( p_sys->palette, 0, 16 * sizeof( uint32_t ) );
 160
 161     /* Load the whole file */
 162     TextLoad( &p_sys->txt, p_demux->s );
 163
 164     /* Parse it */
 165     ParseVobSubIDX( p_demux );
 166
 167     /* Unload */
 168     TextUnload( &p_sys->txt );
 169
 170     /* Find the total length of the vobsubs */
 171     if( p_sys->i_tracks > 0 )
 172     {
 173         int i;
 174         for( i = 0; i < p_sys->i_tracks; i++ )
 175         {
 176             if( p_sys->track[i].i_subtitles > 1 )
 177             {
 178                 if( p_sys->track[i].p_subtitles[p_sys->track[i].i_subtitles-1].i_start > p_sys->i_length )
 179                     p_sys->i_length = (int64_t) p_sys->track[i].p_subtitles[p_sys->track[i].i_subtitles-1].i_start + ( 1 *1000 *1000 );
 180             }
 181         }
 182     }
 183
 184     asprintf( &psz_vobname, "%s://%s", p_demux->psz_access, p_demux->psz_path );
 185     i_len = strlen( psz_vobname );
 186     if( i_len >= 4 ) memcpy( psz_vobname + i_len - 4, ".sub", 4 );
 187
 188     /* open file */
 189     p_sys->p_vobsub_stream = stream_UrlNew( p_demux, psz_vobname );
 190     if( p_sys->p_vobsub_stream == NULL )
 191     {
 192         msg_Err( p_demux, "couldn't open .sub Vobsub file: %s",
 193                  psz_vobname );
 194         free( psz_vobname );
 195         free( p_sys );
 196         return VLC_EGENERIC;
 197     }
 198     free( psz_vobname );
 199
 200     return VLC_SUCCESS;
 201 }
 202
 203 /*****************************************************************************
 204  * Close: Close subtitle demux
 205  *****************************************************************************/
 206 static void Close( vlc_object_t *p_this )
 207 {
 208     int i;
 209     demux_t *p_demux = (demux_t*)p_this;
 210     demux_sys_t *p_sys = p_demux->p_sys;
 211
 212     /* Clean all subs from all tracks */
 213     for( i = 0; i < p_sys->i_tracks; i++ )
 214     {
 215         if( p_sys->track[i].p_subtitles ) free( p_sys->track[i].p_subtitles );
 216     }
 217     if( p_sys->track ) free( p_sys->track );
 218
 219     if( p_sys->p_vobsub_stream )
 220         stream_Delete( p_sys->p_vobsub_stream );
 221
 222     free( p_sys );
 223 }
 224
 225 /*****************************************************************************
 226  * Control:
 227  *****************************************************************************/
 228 static int Control( demux_t *p_demux, int i_query, va_list args )
 229 {
 230     demux_sys_t *p_sys = p_demux->p_sys;
 231     int64_t *pi64, i64;
 232     int i;
 233     double *pf, f;
 234
 235     switch( i_query )
 236     {
 237         case DEMUX_GET_LENGTH:
 238             pi64 = (int64_t*)va_arg( args, int64_t * );
 239             *pi64 = (int64_t) p_sys->i_length;
 240             return VLC_SUCCESS;
 241
 242         case DEMUX_GET_TIME:
 243             pi64 = (int64_t*)va_arg( args, int64_t * );
 244             for( i = 0; i < p_sys->i_tracks; i++ )
 245             {
 246                 vlc_bool_t b_selected;
 247                 /* Check the ES is selected */
 248                 es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
 249                                 p_sys->track[i].p_es, &b_selected );
 250                 if( b_selected ) break;
 251             }
 252             if( i < p_sys->i_tracks && p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles )
 253             {
 254                 *pi64 = p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start;
 255                 return VLC_SUCCESS;
 256             }
 257             return VLC_EGENERIC;
 258
 259         case DEMUX_SET_TIME:
 260             i64 = (int64_t)va_arg( args, int64_t );
 261             for( i = 0; i < p_sys->i_tracks; i++ )
 262             {
 263                 p_sys->track[i].i_current_subtitle = 0;
 264                 while( p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles &&
 265                        p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start < i64 )
 266                 {
 267                     p_sys->track[i].i_current_subtitle++;
 268                 }
 269
 270                 if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
 271                     return VLC_EGENERIC;
 272             }
 273             return VLC_SUCCESS;
 274
 275         case DEMUX_GET_POSITION:
 276             pf = (double*)va_arg( args, double * );
 277             for( i = 0; i < p_sys->i_tracks; i++ )
 278             {
 279                 vlc_bool_t b_selected;
 280                 /* Check the ES is selected */
 281                 es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
 282                                 p_sys->track[i].p_es, &b_selected );
 283                 if( b_selected ) break;
 284             }
 285             if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
 286             {
 287                 *pf = 1.0;
 288             }
 289             else if( p_sys->track[i].i_subtitles > 0 )
 290             {
 291                 *pf = (double)p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start /
 292                       (double)p_sys->i_length;
 293             }
 294             else
 295             {
 296                 *pf = 0.0;
 297             }
 298             return VLC_SUCCESS;
 299
 300         case DEMUX_SET_POSITION:
 301             f = (double)va_arg( args, double );
 302             i64 = (int64_t) f * p_sys->i_length;
 303
 304             for( i = 0; i < p_sys->i_tracks; i++ )
 305             {
 306                 p_sys->track[i].i_current_subtitle = 0;
 307                 while( p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles &&
 308                        p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start < i64 )
 309                 {
 310                     p_sys->track[i].i_current_subtitle++;
 311                 }
 312                 if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
 313                     return VLC_EGENERIC;
 314             }
 315             return VLC_SUCCESS;
 316
 317         case DEMUX_SET_NEXT_DEMUX_TIME:
 318             p_sys->i_next_demux_date = (int64_t)va_arg( args, int64_t );
 319             return VLC_SUCCESS;
 320
 321         case DEMUX_GET_FPS:
 322         case DEMUX_GET_META:
 323         case DEMUX_GET_TITLE_INFO:
 324             return VLC_EGENERIC;
 325
 326         default:
 327             msg_Err( p_demux, "unknown query in subtitle control" );
 328             return VLC_EGENERIC;
 329     }
 330 }
 331
 332 /*****************************************************************************
 333  * Demux: Send subtitle to decoder
 334  *****************************************************************************/
 335 static int Demux( demux_t *p_demux )
 336 {
 337     demux_sys_t *p_sys = p_demux->p_sys;
 338     int64_t i_maxdate;
 339     int i;
 340
 341     for( i = 0; i < p_sys->i_tracks; i++ )
 342     {
 343 #define tk p_sys->track[i]
 344         if( tk.i_current_subtitle >= tk.i_subtitles )
 345             continue;
 346
 347         i_maxdate = (int64_t) p_sys->i_next_demux_date;
 348         if( i_maxdate <= 0 && tk.i_current_subtitle < tk.i_subtitles )
 349         {
 350             /* Should not happen */
 351             i_maxdate = (int64_t) tk.p_subtitles[tk.i_current_subtitle].i_start + 1;
 352         }
 353
 354         while( tk.i_current_subtitle < tk.i_subtitles &&
 355                tk.p_subtitles[tk.i_current_subtitle].i_start < i_maxdate )
 356         {
 357             int i_pos = tk.p_subtitles[tk.i_current_subtitle].i_vobsub_location;
 358             block_t *p_block;
 359             int i_size = 0;
 360
 361             /* first compute SPU size */
 362             if( tk.i_current_subtitle + 1 < tk.i_subtitles )
 363             {
 364                 i_size = tk.p_subtitles[tk.i_current_subtitle+1].i_vobsub_location - i_pos;
 365             }
 366             if( i_size <= 0 ) i_size = 65535;   /* Invalid or EOF */
 367
 368             /* Seek at the right place */
 369             if( stream_Seek( p_sys->p_vobsub_stream, i_pos ) )
 370             {
 371                 msg_Warn( p_demux,
 372                           "cannot seek in the VobSub to the correct time %d", i_pos );
 373                 tk.i_current_subtitle++;
 374                 continue;
 375             }
 376
 377             /* allocate a packet */
 378             if( ( p_block = block_New( p_demux, i_size ) ) == NULL )
 379             {
 380                 tk.i_current_subtitle++;
 381                 continue;
 382             }
 383
 384             /* read data */
 385             p_block->i_buffer = stream_Read( p_sys->p_vobsub_stream, p_block->p_buffer, i_size );
 386             if( p_block->i_buffer <= 6 )
 387             {
 388                 block_Release( p_block );
 389                 tk.i_current_subtitle++;
 390                 continue;
 391             }
 392
 393             /* pts */
 394             p_block->i_pts = tk.p_subtitles[tk.i_current_subtitle].i_start;
 395
 396             /* demux this block */
 397             DemuxVobSub( p_demux, p_block );
 398
 399             tk.i_current_subtitle++;
 400         }
 401 #undef tk
 402     }
 403
 404     /* */
 405     p_sys->i_next_demux_date = 0;
 406
 407     return 1;
 408 }
 409
 410 static int TextLoad( text_t *txt, stream_t *s )
 411 {
 412     int   i_line_max;
 413
 414     /* init txt */
 415     i_line_max          = 500;
 416     txt->i_line_count   = 0;
 417     txt->i_line         = 0;
 418     txt->line           = calloc( i_line_max, sizeof( char * ) );
 419
 420     /* load the complete file */
 421     for( ;; )
 422     {
 423         char *psz = stream_ReadLine( s );
 424
 425         if( psz == NULL )
 426             break;
 427
 428         txt->line[txt->i_line_count++] = psz;
 429         if( txt->i_line_count >= i_line_max )
 430         {
 431             i_line_max += 100;
 432             txt->line = realloc( txt->line, i_line_max * sizeof( char*) );
 433         }
 434     }
 435
 436     if( txt->i_line_count <= 0 )
 437     {
 438         if( txt->line ) free( txt->line );
 439         return VLC_EGENERIC;
 440     }
 441
 442     return VLC_SUCCESS;
 443 }
 444 static void TextUnload( text_t *txt )
 445 {
 446     int i;
 447
 448     for( i = 0; i < txt->i_line_count; i++ )
 449     {
 450         if( txt->line[i] ) free( txt->line[i] );
 451     }
 452     if( txt->line ) free( txt->line );
 453     txt->i_line       = 0;
 454     txt->i_line_count = 0;
 455 }
 456
 457 static char *TextGetLine( text_t *txt )
 458 {
 459     if( txt->i_line >= txt->i_line_count )
 460         return( NULL );
 461
 462     return txt->line[txt->i_line++];
 463 }
 464
 465 static int ParseVobSubIDX( demux_t *p_demux )
 466 {
 467     demux_sys_t *p_sys = p_demux->p_sys;
 468     text_t      *txt = &p_sys->txt;
 469     char        *line;
 470     vobsub_track_t *current_tk;
 471
 472     for( ;; )
 473     {
 474         if( ( line = TextGetLine( txt ) ) == NULL )
 475         {
 476             return( VLC_EGENERIC );
 477         }
 478
 479         if( *line == 0 || *line == '\r' || *line == '\n' || *line == '#' )
 480             continue;
 481         else if( !strncmp( "size:", line, 5 ) )
 482         {
 483             /* Store the original size of the video */
 484             if( sscanf( line, "size: %dx%d",
 485                         &p_sys->i_original_frame_width, &p_sys->i_original_frame_height ) == 2 )
 486             {
 487                 msg_Dbg( p_demux, "original frame size: %dx%d", p_sys->i_original_frame_width, p_sys->i_original_frame_height );
 488             }
 489             else
 490             {
 491                 msg_Warn( p_demux, "reading original frame size failed" );
 492             }
 493         }
 494         else if( !strncmp( "palette:", line, 8 ) )
 495         {
 496             int i;
 497
 498             /* Store the palette of the subs */
 499             if( sscanf( line, "palette: %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x",
 500                         &p_sys->palette[0], &p_sys->palette[1], &p_sys->palette[2], &p_sys->palette[3],
 501                         &p_sys->palette[4], &p_sys->palette[5], &p_sys->palette[6], &p_sys->palette[7],
 502                         &p_sys->palette[8], &p_sys->palette[9], &p_sys->palette[10], &p_sys->palette[11],
 503                         &p_sys->palette[12], &p_sys->palette[13], &p_sys->palette[14], &p_sys->palette[15] ) == 16 )
 504             {
 505                 for( i = 0; i < 16; i++ )
 506                 {
 507                     uint8_t r = 0, g = 0, b = 0;
 508                     uint8_t y = 0, u = 0, v = 0;
 509                     r = (p_sys->palette[i] >> 16) & 0xff;
 510                     g = (p_sys->palette[i] >> 8) & 0xff;
 511                     b = (p_sys->palette[i] >> 0) & 0xff;
 512                     /* msg_Dbg( p_demux, "palette %d: R=%x, G=%x, B=%x", i, r, g, b ); */
 513                     y = (uint8_t) __MIN(abs(r * 2104 + g * 4130 + b * 802 + 4096 + 131072) >> 13, 235);
 514                     u = (uint8_t) __MIN(abs(r * -1214 + g * -2384 + b * 3598 + 4096 + 1048576) >> 13, 240);
 515                     v = (uint8_t) __MIN(abs(r * 3598 + g * -3013 + b * -585 + 4096 + 1048576) >> 13, 240);
 516                     p_sys->palette[i] = 0;
 517                     p_sys->palette[i] |= (y&0xff)<<16;
 518                     p_sys->palette[i] |= (u&0xff);
 519                     p_sys->palette[i] |= (v&0xff)<<8;
 520                     /* msg_Dbg( p_demux, "palette %d: y=%x, u=%x, v=%x", i, y, u, v ); */
 521
 522                 }
 523                 p_sys->b_palette = VLC_TRUE;
 524                 msg_Dbg( p_demux, "vobsub palette read" );
 525             }
 526             else
 527             {
 528                 msg_Warn( p_demux, "reading original palette failed" );
 529             }
 530         }
 531         else if( !strncmp( "id:", line, 3 ) )
 532         {
 533             char language[20];
 534             int i_track_id;
 535             es_format_t fmt;
 536
 537             /* Lets start a new track */
 538             if( sscanf( line, "id: %2s, index: %d",
 539                         language, &i_track_id ) == 2 )
 540             {
 541                 p_sys->i_tracks++;
 542                 p_sys->track = (vobsub_track_t*)realloc( p_sys->track, sizeof( vobsub_track_t ) * (p_sys->i_tracks + 1 ) );
 543
 544                 /* Init the track */
 545                 current_tk = &p_sys->track[p_sys->i_tracks - 1];
 546                 memset( current_tk, 0, sizeof( vobsub_track_t ) );
 547                 current_tk->i_current_subtitle = 0;
 548                 current_tk->i_subtitles = 0;
 549                 current_tk->p_subtitles = (subtitle_t*)malloc( sizeof( subtitle_t ) );;
 550                 current_tk->i_track_id = i_track_id;
 551                 current_tk->i_delay = (int64_t)0;
 552
 553                 es_format_Init( &fmt, SPU_ES, VLC_FOURCC( 's','p','u',' ' ) );
 554                 fmt.subs.spu.i_original_frame_width = p_sys->i_original_frame_width;
 555                 fmt.subs.spu.i_original_frame_height = p_sys->i_original_frame_height;
 556                 fmt.psz_language = strdup( language );
 557                 if( p_sys->b_palette )
 558                 {
 559                     fmt.subs.spu.palette[0] = 0xBeef;
 560                     memcpy( &fmt.subs.spu.palette[1], p_sys->palette, 16 * sizeof( uint32_t ) );
 561                 }
 562
 563                 current_tk->p_es = es_out_Add( p_demux->out, &fmt );
 564                 msg_Dbg( p_demux, "new vobsub track detected" );
 565             }
 566             else
 567             {
 568                 msg_Warn( p_demux, "reading new track failed" );
 569             }
 570         }
 571         else if( !strncmp( line, "timestamp:", 10 ) )
 572         {
 573             /*
 574              * timestamp: [sign]hh:mm:ss:mss, filepos: loc
 575              * loc is the hex location of the spu in the .sub file
 576              */
 577             int h, m, s, ms, count, loc = 0;
 578             int i_sign = 1;
 579             int64_t i_start, i_location = 0;
 580
 581             vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
 582
 583             if( sscanf( line, "timestamp: %d%n:%d:%d:%d, filepos: %x",
 584                         &h, &count, &m, &s, &ms, &loc ) >= 5  )
 585             {
 586                 subtitle_t *current_sub;
 587
 588                 if( line[count-3] == '-' )
 589                 {
 590                     i_sign = -1;
 591                     h = -h;
 592                 }
 593                 i_start = (int64_t) ( h * 3600*1000 +
 594                             m * 60*1000 +
 595                             s * 1000 +
 596                             ms ) * 1000;
 597                 i_location = loc;
 598
 599                 current_tk->i_subtitles++;
 600                 current_tk->p_subtitles = (subtitle_t*)realloc( current_tk->p_subtitles, sizeof( subtitle_t ) * (current_tk->i_subtitles + 1 ) );
 601                 current_sub = &current_tk->p_subtitles[current_tk->i_subtitles - 1];
 602
 603                 current_sub->i_start = (int64_t) i_start * i_sign;
 604                 current_sub->i_start += current_tk->i_delay;
 605                 current_sub->i_vobsub_location = i_location;
 606             }
 607         }
 608         else if( !strncasecmp( line, "delay:", 6 ) )
 609         {
 610             /*
 611              * delay: [sign]hh:mm:ss:mss
 612              */
 613             int h, m, s, ms, count = 0;
 614             int i_sign = 1;
 615             int64_t i_gap = 0;
 616
 617             vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
 618
 619             if( sscanf( line, "%*celay: %d%n:%d:%d:%d",
 620                         &h, &count, &m, &s, &ms ) >= 4 )
 621             {
 622                 if( line[count-3] == '-' )
 623                 {
 624                     i_sign = -1;
 625                     h = -h;
 626                 }
 627                 i_gap = (int64_t) ( h * 3600*1000 +
 628                             m * 60*1000 +
 629                             s * 1000 +
 630                             ms ) * 1000;
 631
 632                 current_tk->i_delay = current_tk->i_delay + (i_gap * i_sign);
 633                 msg_Dbg( p_demux, "sign: %+d gap: %+lld global delay: %+lld",
 634                          i_sign, (long long)i_gap,
 635                          (long long)current_tk->i_delay  );
 636             }
 637         }
 638     }
 639     return( 0 );
 640 }
 641
 642 static int DemuxVobSub( demux_t *p_demux, block_t *p_bk )
 643 {
 644     demux_sys_t *p_sys = p_demux->p_sys;
 645     uint8_t     *p = p_bk->p_buffer;
 646     uint8_t     *p_end = &p_bk->p_buffer[p_bk->i_buffer];
 647     int i;
 648
 649     while( p < p_end )
 650     {
 651         int i_size = ps_pkt_size( p, p_end - p );
 652         block_t *p_pkt;
 653         int      i_id;
 654         int      i_spu;
 655
 656         if( i_size <= 0 )
 657         {
 658             break;
 659         }
 660         if( p[0] != 0 || p[1] != 0 || p[2] != 0x01 )
 661         {
 662             msg_Warn( p_demux, "invalid PES" );
 663             break;
 664         }
 665
 666         if( p[3] != 0xbd )
 667         {
 668             /* msg_Dbg( p_demux, "we don't need these ps packets (id=0x1%2.2x)", p[3] ); */
 669             p += i_size;
 670             continue;
 671         }
 672
 673         /* Create a block */
 674         p_pkt = block_New( p_demux, i_size );
 675         memcpy( p_pkt->p_buffer, p, i_size);
 676         p += i_size;
 677
 678         i_id = ps_pkt_id( p_pkt );
 679         if( (i_id&0xffe0) != 0xbd20 ||
 680             ps_pkt_parse_pes( p_pkt, 1 ) )
 681         {
 682             block_Release( p_pkt );
 683             continue;
 684         }
 685         i_spu = i_id&0x1f;
 686         /* msg_Dbg( p_demux, "SPU track %d size %d", i_spu, i_size ); */
 687
 688         for( i = 0; i < p_sys->i_tracks; i++ )
 689         {
 690 #define tk p_sys->track[i]
 691             p_pkt->i_dts = p_pkt->i_pts = p_bk->i_pts;
 692             p_pkt->i_length = 0;
 693
 694             if( tk.p_es && tk.i_track_id == i_spu )
 695             {
 696                 es_out_Send( p_demux->out, tk.p_es, p_pkt );
 697                 p_bk->i_pts = 0;     /*only first packet has a pts */
 698                 break;
 699             }
 700             else if( i == p_sys->i_tracks - 1 )
 701             {
 702                 block_Release( p_pkt );
 703             }
 704 #undef tk
 705         }
 706     }
 707
 708     return VLC_SUCCESS;
 709 }