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 <sys/types.h>
  36 #include <limits.h>
  37
  38 #include <vlc_demux.h>
  39
  40 #include "ps.h"
  41 #include "vobsub.h"
  42
  43 #define MAX_LINE 8192
  44
  45 /*****************************************************************************
  46  * Module descriptor
  47  *****************************************************************************/
  48 static int  Open ( vlc_object_t *p_this );
  49 static void Close( vlc_object_t *p_this );
  50
  51 vlc_module_begin ()
  52     set_description( N_("Vobsub subtitles parser") )
  53     set_category( CAT_INPUT )
  54     set_subcategory( SUBCAT_INPUT_DEMUX )
  55     set_capability( "demux", 1 )
  56
  57     set_callbacks( Open, Close )
  58
  59     add_shortcut( "vobsub", "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     bool  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     if( unlikely( !p_sys ) )
 153         return VLC_ENOMEM;
 154     p_sys->i_length = 0;
 155     p_sys->p_vobsub_stream = NULL;
 156     p_sys->i_tracks = 0;
 157     p_sys->track = malloc( sizeof( vobsub_track_t ) );
 158     if( unlikely( !p_sys->track ) )
 159         goto error;
 160     p_sys->i_original_frame_width = -1;
 161     p_sys->i_original_frame_height = -1;
 162     p_sys->b_palette = false;
 163     memset( p_sys->palette, 0, 16 * sizeof( uint32_t ) );
 164
 165     /* Load the whole file */
 166     TextLoad( &p_sys->txt, p_demux->s );
 167
 168     /* Parse it */
 169     ParseVobSubIDX( p_demux );
 170
 171     /* Unload */
 172     TextUnload( &p_sys->txt );
 173
 174     /* Find the total length of the vobsubs */
 175     if( p_sys->i_tracks > 0 )
 176     {
 177         int i;
 178         for( i = 0; i < p_sys->i_tracks; i++ )
 179         {
 180             if( p_sys->track[i].i_subtitles > 1 )
 181             {
 182                 if( p_sys->track[i].p_subtitles[p_sys->track[i].i_subtitles-1].i_start > p_sys->i_length )
 183                     p_sys->i_length = (int64_t) p_sys->track[i].p_subtitles[p_sys->track[i].i_subtitles-1].i_start + ( 1 *1000 *1000 );
 184             }
 185         }
 186     }
 187
 188     if( asprintf( &psz_vobname, "%s://%s", p_demux->psz_access,
 189                   p_demux->psz_location ) == -1 )
 190         goto error;
 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         goto error;
 203     }
 204     free( psz_vobname );
 205
 206     return VLC_SUCCESS;
 207
 208 error:
 209     /* Clean all subs from all tracks */
 210     for( int i = 0; i < p_sys->i_tracks; i++ )
 211         free( p_sys->track[i].p_subtitles );
 212     free( p_sys->track );
 213     free( p_sys );
 214
 215     return VLC_EGENERIC;
 216 }
 217
 218 /*****************************************************************************
 219  * Close: Close subtitle demux
 220  *****************************************************************************/
 221 static void Close( vlc_object_t *p_this )
 222 {
 223     int i;
 224     demux_t *p_demux = (demux_t*)p_this;
 225     demux_sys_t *p_sys = p_demux->p_sys;
 226
 227     /* Clean all subs from all tracks */
 228     for( i = 0; i < p_sys->i_tracks; i++ )
 229         free( p_sys->track[i].p_subtitles );
 230
 231     free( p_sys->track );
 232
 233     if( p_sys->p_vobsub_stream )
 234         stream_Delete( p_sys->p_vobsub_stream );
 235
 236     free( p_sys );
 237 }
 238
 239 /*****************************************************************************
 240  * Control:
 241  *****************************************************************************/
 242 static int Control( demux_t *p_demux, int i_query, va_list args )
 243 {
 244     demux_sys_t *p_sys = p_demux->p_sys;
 245     int64_t *pi64, i64;
 246     int i;
 247     double *pf, f;
 248
 249     switch( i_query )
 250     {
 251         case DEMUX_GET_LENGTH:
 252             pi64 = (int64_t*)va_arg( args, int64_t * );
 253             *pi64 = (int64_t) p_sys->i_length;
 254             return VLC_SUCCESS;
 255
 256         case DEMUX_GET_TIME:
 257             pi64 = (int64_t*)va_arg( args, int64_t * );
 258             for( i = 0; i < p_sys->i_tracks; i++ )
 259             {
 260                 bool b_selected;
 261                 /* Check the ES is selected */
 262                 es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
 263                                 p_sys->track[i].p_es, &b_selected );
 264                 if( b_selected ) break;
 265             }
 266             if( i < p_sys->i_tracks && p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles )
 267             {
 268                 *pi64 = p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start;
 269                 return VLC_SUCCESS;
 270             }
 271             return VLC_EGENERIC;
 272
 273         case DEMUX_SET_TIME:
 274             i64 = (int64_t)va_arg( args, int64_t );
 275             for( i = 0; i < p_sys->i_tracks; i++ )
 276             {
 277                 p_sys->track[i].i_current_subtitle = 0;
 278                 while( p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles &&
 279                        p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start < i64 )
 280                 {
 281                     p_sys->track[i].i_current_subtitle++;
 282                 }
 283
 284                 if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
 285                     return VLC_EGENERIC;
 286             }
 287             return VLC_SUCCESS;
 288
 289         case DEMUX_GET_POSITION:
 290             pf = (double*)va_arg( args, double * );
 291             for( i = 0; i < p_sys->i_tracks; i++ )
 292             {
 293                 bool b_selected;
 294                 /* Check the ES is selected */
 295                 es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
 296                                 p_sys->track[i].p_es, &b_selected );
 297                 if( b_selected ) break;
 298             }
 299             if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
 300             {
 301                 *pf = 1.0;
 302             }
 303             else if( p_sys->track[i].i_subtitles > 0 )
 304             {
 305                 *pf = (double)p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start /
 306                       (double)p_sys->i_length;
 307             }
 308             else
 309             {
 310                 *pf = 0.0;
 311             }
 312             return VLC_SUCCESS;
 313
 314         case DEMUX_SET_POSITION:
 315             f = (double)va_arg( args, double );
 316             i64 = (int64_t) f * p_sys->i_length;
 317
 318             for( i = 0; i < p_sys->i_tracks; i++ )
 319             {
 320                 p_sys->track[i].i_current_subtitle = 0;
 321                 while( p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles &&
 322                        p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start < i64 )
 323                 {
 324                     p_sys->track[i].i_current_subtitle++;
 325                 }
 326                 if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
 327                     return VLC_EGENERIC;
 328             }
 329             return VLC_SUCCESS;
 330
 331         case DEMUX_SET_NEXT_DEMUX_TIME:
 332             p_sys->i_next_demux_date = (int64_t)va_arg( args, int64_t );
 333             return VLC_SUCCESS;
 334
 335         case DEMUX_GET_PTS_DELAY:
 336         case DEMUX_GET_FPS:
 337         case DEMUX_GET_META:
 338         case DEMUX_GET_TITLE_INFO:
 339         case DEMUX_HAS_UNSUPPORTED_META:
 340         case DEMUX_GET_ATTACHMENTS:
 341         case DEMUX_CAN_RECORD:
 342             return VLC_EGENERIC;
 343
 344         default:
 345             msg_Warn( p_demux, "unknown query in subtitle control" );
 346             return VLC_EGENERIC;
 347     }
 348 }
 349
 350 /*****************************************************************************
 351  * Demux: Send subtitle to decoder
 352  *****************************************************************************/
 353 static int Demux( demux_t *p_demux )
 354 {
 355     demux_sys_t *p_sys = p_demux->p_sys;
 356     int64_t i_maxdate;
 357     int i, i_read;
 358
 359     for( i = 0; i < p_sys->i_tracks; i++ )
 360     {
 361 #define tk p_sys->track[i]
 362         if( tk.i_current_subtitle >= tk.i_subtitles )
 363             continue;
 364
 365         i_maxdate = p_sys->i_next_demux_date;
 366         if( i_maxdate <= 0 && tk.i_current_subtitle < tk.i_subtitles )
 367         {
 368             /* Should not happen */
 369             i_maxdate = tk.p_subtitles[tk.i_current_subtitle].i_start + 1;
 370         }
 371
 372         while( tk.i_current_subtitle < tk.i_subtitles &&
 373                tk.p_subtitles[tk.i_current_subtitle].i_start < i_maxdate )
 374         {
 375             int i_pos = tk.p_subtitles[tk.i_current_subtitle].i_vobsub_location;
 376             block_t *p_block;
 377             int i_size = 0;
 378
 379             /* first compute SPU size */
 380             if( tk.i_current_subtitle + 1 < tk.i_subtitles )
 381             {
 382                 i_size = tk.p_subtitles[tk.i_current_subtitle+1].i_vobsub_location - i_pos;
 383             }
 384             if( i_size <= 0 ) i_size = 65535;   /* Invalid or EOF */
 385
 386             /* Seek at the right place */
 387             if( stream_Seek( p_sys->p_vobsub_stream, i_pos ) )
 388             {
 389                 msg_Warn( p_demux,
 390                           "cannot seek in the VobSub to the correct time %d", i_pos );
 391                 tk.i_current_subtitle++;
 392                 continue;
 393             }
 394
 395             /* allocate a packet */
 396             if( ( p_block = block_New( p_demux, i_size ) ) == NULL )
 397             {
 398                 tk.i_current_subtitle++;
 399                 continue;
 400             }
 401
 402             /* read data */
 403             i_read = stream_Read( p_sys->p_vobsub_stream, p_block->p_buffer, i_size );
 404             if( i_read <= 6 )
 405             {
 406                 block_Release( p_block );
 407                 tk.i_current_subtitle++;
 408                 continue;
 409             }
 410             p_block->i_buffer = i_read;
 411
 412             /* pts */
 413             p_block->i_pts = VLC_TS_0 + tk.p_subtitles[tk.i_current_subtitle].i_start;
 414
 415             /* demux this block */
 416             DemuxVobSub( p_demux, p_block );
 417
 418             tk.i_current_subtitle++;
 419         }
 420 #undef tk
 421     }
 422
 423     /* */
 424     p_sys->i_next_demux_date = 0;
 425
 426     return 1;
 427 }
 428
 429 static int TextLoad( text_t *txt, stream_t *s )
 430 {
 431     char **lines = NULL;
 432     size_t n = 0;
 433
 434     /* load the complete file */
 435     for( ;; )
 436     {
 437         char *psz = stream_ReadLine( s );
 438         char **ppsz_new;
 439
 440         if( psz == NULL || (n >= INT_MAX/sizeof(char *)) )
 441             break;
 442
 443         ppsz_new = realloc( lines, (n + 1) * sizeof (char *) );
 444         if( ppsz_new == NULL )
 445         {
 446             free( psz );
 447             break;
 448         }
 449         lines = ppsz_new;
 450         lines[n++] = psz;
 451     }
 452
 453     txt->i_line_count = n;
 454     txt->i_line       = 0;
 455     txt->line         = lines;
 456
 457     return VLC_SUCCESS;
 458 }
 459
 460 static void TextUnload( text_t *txt )
 461 {
 462     int i;
 463
 464     for( i = 0; i < txt->i_line_count; i++ )
 465         free( txt->line[i] );
 466
 467     free( txt->line );
 468     txt->i_line       = 0;
 469     txt->i_line_count = 0;
 470 }
 471
 472 static char *TextGetLine( text_t *txt )
 473 {
 474     if( txt->i_line >= txt->i_line_count )
 475         return( NULL );
 476
 477     return txt->line[txt->i_line++];
 478 }
 479
 480 static int ParseVobSubIDX( demux_t *p_demux )
 481 {
 482     demux_sys_t *p_sys = p_demux->p_sys;
 483     text_t      *txt = &p_sys->txt;
 484     char        *line;
 485     vobsub_track_t *current_tk = NULL;
 486
 487     for( ;; )
 488     {
 489         if( ( line = TextGetLine( txt ) ) == NULL )
 490         {
 491             return( VLC_EGENERIC );
 492         }
 493
 494         if( *line == 0 || *line == '\r' || *line == '\n' || *line == '#' )
 495         {
 496             continue;
 497         }
 498         else if( !strncmp( "size:", line, 5 ) )
 499         {
 500             /* Store the original size of the video */
 501             if( vobsub_size_parse( line, &p_sys->i_original_frame_width,
 502                                    &p_sys->i_original_frame_height ) == VLC_SUCCESS )
 503             {
 504                 msg_Dbg( p_demux, "original frame size: %dx%d", p_sys->i_original_frame_width, p_sys->i_original_frame_height );
 505             }
 506             else
 507             {
 508                 msg_Warn( p_demux, "reading original frame size failed" );
 509             }
 510         }
 511         else if( !strncmp( "palette:", line, 8 ) )
 512         {
 513             if( vobsub_palette_parse( line, p_sys->palette ) == VLC_SUCCESS )
 514             {
 515                 p_sys->b_palette = true;
 516                 msg_Dbg( p_demux, "vobsub palette read" );
 517             }
 518             else
 519             {
 520                 msg_Warn( p_demux, "reading original palette failed" );
 521             }
 522         }
 523         else if( !strncmp( "id:", line, 3 ) )
 524         {
 525             char language[33]; /* Usually 2 or 3 letters, sometimes more.
 526                                   Spec (or lack of) doesn't define any limit */
 527             int i_track_id;
 528             es_format_t fmt;
 529
 530             /* Lets start a new track */
 531             if( sscanf( line, "id: %32[^ ,], index: %d",
 532                         language, &i_track_id ) == 2 )
 533             {
 534                 p_sys->i_tracks++;
 535                 p_sys->track = xrealloc( p_sys->track,
 536                           sizeof( vobsub_track_t ) * (p_sys->i_tracks + 1 ) );
 537
 538                 /* Init the track */
 539                 current_tk = &p_sys->track[p_sys->i_tracks - 1];
 540                 memset( current_tk, 0, sizeof( vobsub_track_t ) );
 541                 current_tk->i_current_subtitle = 0;
 542                 current_tk->i_subtitles = 0;
 543                 current_tk->p_subtitles = xmalloc( sizeof( subtitle_t ) );
 544                 current_tk->i_track_id = i_track_id;
 545                 current_tk->i_delay = (int64_t)0;
 546
 547                 es_format_Init( &fmt, SPU_ES, VLC_CODEC_SPU );
 548                 fmt.subs.spu.i_original_frame_width = p_sys->i_original_frame_width;
 549                 fmt.subs.spu.i_original_frame_height = p_sys->i_original_frame_height;
 550                 fmt.psz_language = language;
 551                 if( p_sys->b_palette )
 552                 {
 553                     fmt.subs.spu.palette[0] = 0xBeef;
 554                     memcpy( &fmt.subs.spu.palette[1], p_sys->palette, 16 * sizeof( uint32_t ) );
 555                 }
 556
 557                 current_tk->p_es = es_out_Add( p_demux->out, &fmt );
 558                 msg_Dbg( p_demux, "new vobsub track detected" );
 559             }
 560             else
 561             {
 562                 msg_Warn( p_demux, "reading new track failed" );
 563             }
 564         }
 565         else if( !strncmp( line, "timestamp:", 10 ) )
 566         {
 567             /*
 568              * timestamp: [sign]hh:mm:ss:mss, filepos: loc
 569              * loc is the hex location of the spu in the .sub file
 570              */
 571             int h, m, s, ms, count, loc = 0;
 572             int i_sign = 1;
 573             int64_t i_start, i_location = 0;
 574
 575             if( p_sys->i_tracks > 0 &&
 576                 sscanf( line, "timestamp: %d%n:%d:%d:%d, filepos: %x",
 577                         &h, &count, &m, &s, &ms, &loc ) >= 5  )
 578             {
 579                 vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
 580                 subtitle_t *current_sub;
 581
 582                 if( line[count-3] == '-' )
 583                 {
 584                     i_sign = -1;
 585                     h = -h;
 586                 }
 587                 i_start = (int64_t) ( h * 3600*1000 +
 588                             m * 60*1000 +
 589                             s * 1000 +
 590                             ms ) * 1000;
 591                 i_location = loc;
 592
 593                 current_tk->i_subtitles++;
 594                 current_tk->p_subtitles =
 595                     xrealloc( current_tk->p_subtitles,
 596                       sizeof( subtitle_t ) * (current_tk->i_subtitles + 1 ) );
 597                 current_sub = &current_tk->p_subtitles[current_tk->i_subtitles - 1];
 598
 599                 current_sub->i_start = i_start * i_sign;
 600                 current_sub->i_start += current_tk->i_delay;
 601                 current_sub->i_vobsub_location = i_location;
 602             }
 603             else
 604             {
 605                 msg_Warn( p_demux, "reading timestamp failed" );
 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             if( p_sys->i_tracks > 0 &&
 618                 sscanf( line, "%*celay: %d%n:%d:%d:%d",
 619                         &h, &count, &m, &s, &ms ) >= 4 )
 620             {
 621                 vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
 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: %+"PRId64" global delay: %+"PRId64"",
 634                          i_sign, i_gap, current_tk->i_delay );
 635             }
 636             else
 637             {
 638                 msg_Warn( p_demux, "reading delay failed" );
 639             }
 640         }
 641     }
 642     return( 0 );
 643 }
 644
 645 static int DemuxVobSub( demux_t *p_demux, block_t *p_bk )
 646 {
 647     demux_sys_t *p_sys = p_demux->p_sys;
 648     uint8_t     *p = p_bk->p_buffer;
 649     uint8_t     *p_end = &p_bk->p_buffer[p_bk->i_buffer];
 650     int i;
 651
 652     while( p + 6 < p_end )
 653     {
 654         int i_size = ps_pkt_size( p, p_end - p );
 655         block_t *p_pkt;
 656         int      i_id;
 657         int      i_spu;
 658
 659         if( i_size <= 0 )
 660             break;
 661
 662         if( i_size > p_end - p )
 663         {
 664             msg_Warn( p_demux, "broken PES size" );
 665             break;
 666         }
 667
 668         if( p[0] != 0 || p[1] != 0 || p[2] != 0x01 )
 669         {
 670             msg_Warn( p_demux, "invalid PES" );
 671             break;
 672         }
 673
 674         if( p[3] != 0xbd )
 675         {
 676             /* msg_Dbg( p_demux, "we don't need these ps packets (id=0x1%2.2x)", p[3] ); */
 677             p += i_size;
 678             continue;
 679         }
 680
 681         /* Create a block */
 682         p_pkt = block_New( p_demux, i_size );
 683         memcpy( p_pkt->p_buffer, p, i_size);
 684         p += i_size;
 685
 686         i_id = ps_pkt_id( p_pkt );
 687         if( (i_id&0xffe0) != 0xbd20 ||
 688             ps_pkt_parse_pes( p_pkt, 1 ) )
 689         {
 690             block_Release( p_pkt );
 691             continue;
 692         }
 693         i_spu = i_id&0x1f;
 694         /* msg_Dbg( p_demux, "SPU track %d size %d", i_spu, i_size ); */
 695
 696         for( i = 0; i < p_sys->i_tracks; i++ )
 697         {
 698             vobsub_track_t *p_tk = &p_sys->track[i];
 699
 700             p_pkt->i_dts = p_pkt->i_pts = p_bk->i_pts;
 701             p_pkt->i_length = 0;
 702
 703             if( p_tk->p_es && p_tk->i_track_id == i_spu )
 704             {
 705                 es_out_Send( p_demux->out, p_tk->p_es, p_pkt );
 706                 p_bk->i_pts = VLC_TS_INVALID;     /*only first packet has a pts */
 707                 break;
 708             }
 709         }
 710         if( i >= p_sys->i_tracks )
 711         {
 712             block_Release( p_pkt );
 713         }
 714     }
 715
 716     return VLC_SUCCESS;
 717 }
 718