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