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