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
  44 #define MAX_LINE 8192
  45
  46 /*****************************************************************************
  47  * Module descriptor
  48  *****************************************************************************/
  49 static int  Open ( vlc_object_t *p_this );
  50 static void Close( vlc_object_t *p_this );
  51
  52 vlc_module_begin ()
  53     set_description( N_("Vobsub subtitles parser") )
  54     set_category( CAT_INPUT )
  55     set_subcategory( SUBCAT_INPUT_DEMUX )
  56     set_capability( "demux", 1 )
  57
  58     set_callbacks( Open, Close )
  59
  60     add_shortcut( "vobsub" )
  61     add_shortcut( "subtitle" )
  62 vlc_module_end ()
  63
  64 /*****************************************************************************
  65  * Prototypes:
  66  *****************************************************************************/
  67
  68 typedef struct
  69 {
  70     int     i_line_count;
  71     int     i_line;
  72     char    **line;
  73 } text_t;
  74 static int  TextLoad( text_t *, stream_t *s );
  75 static void TextUnload( text_t * );
  76
  77 typedef struct
  78 {
  79     int64_t i_start;
  80     int     i_vobsub_location;
  81 } subtitle_t;
  82
  83 typedef struct
  84 {
  85     es_format_t fmt;
  86     es_out_id_t *p_es;
  87     int         i_track_id;
  88
  89     int         i_current_subtitle;
  90     int         i_subtitles;
  91     subtitle_t  *p_subtitles;
  92
  93     int64_t     i_delay;
  94 } vobsub_track_t;
  95
  96 struct demux_sys_t
  97 {
  98     int64_t     i_next_demux_date;
  99     int64_t     i_length;
 100
 101     text_t      txt;
 102     stream_t    *p_vobsub_stream;
 103
 104     /* all tracks */
 105     int            i_tracks;
 106     vobsub_track_t *track;
 107
 108     int         i_original_frame_width;
 109     int         i_original_frame_height;
 110     bool  b_palette;
 111     uint32_t    palette[16];
 112 };
 113
 114 static int Demux( demux_t * );
 115 static int Control( demux_t *, int, va_list );
 116
 117 static int ParseVobSubIDX( demux_t * );
 118 static int DemuxVobSub( demux_t *, block_t *);
 119
 120 /*****************************************************************************
 121  * Module initializer
 122  *****************************************************************************/
 123 static int Open ( vlc_object_t *p_this )
 124 {
 125     demux_t     *p_demux = (demux_t*)p_this;
 126     demux_sys_t *p_sys;
 127     char *psz_vobname, *s;
 128     int i_len;
 129
 130     if( ( s = stream_ReadLine( p_demux->s ) ) != NULL )
 131     {
 132         if( !strcasestr( s, "# VobSub index file" ) )
 133         {
 134             msg_Dbg( p_demux, "this doesn't seem to be a vobsub file" );
 135             free( s );
 136             if( stream_Seek( p_demux->s, 0 ) )
 137             {
 138                 msg_Warn( p_demux, "failed to rewind" );
 139             }
 140             return VLC_EGENERIC;
 141         }
 142         free( s );
 143
 144     }
 145     else
 146     {
 147         msg_Dbg( p_demux, "could not read vobsub IDX file" );
 148         return VLC_EGENERIC;
 149     }
 150
 151     p_demux->pf_demux = Demux;
 152     p_demux->pf_control = Control;
 153     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 154     p_sys->i_length = 0;
 155     p_sys->p_vobsub_stream = NULL;
 156     p_sys->i_tracks = 0;
 157     p_sys->track = (vobsub_track_t *)malloc( sizeof( vobsub_track_t ) );
 158     p_sys->i_original_frame_width = -1;
 159     p_sys->i_original_frame_height = -1;
 160     p_sys->b_palette = false;
 161     memset( p_sys->palette, 0, 16 * sizeof( uint32_t ) );
 162
 163     /* Load the whole file */
 164     TextLoad( &p_sys->txt, p_demux->s );
 165
 166     /* Parse it */
 167     ParseVobSubIDX( p_demux );
 168
 169     /* Unload */
 170     TextUnload( &p_sys->txt );
 171
 172     /* Find the total length of the vobsubs */
 173     if( p_sys->i_tracks > 0 )
 174     {
 175         int i;
 176         for( i = 0; i < p_sys->i_tracks; i++ )
 177         {
 178             if( p_sys->track[i].i_subtitles > 1 )
 179             {
 180                 if( p_sys->track[i].p_subtitles[p_sys->track[i].i_subtitles-1].i_start > p_sys->i_length )
 181                     p_sys->i_length = (int64_t) p_sys->track[i].p_subtitles[p_sys->track[i].i_subtitles-1].i_start + ( 1 *1000 *1000 );
 182             }
 183         }
 184     }
 185
 186     if( asprintf( &psz_vobname, "%s://%s", p_demux->psz_access, p_demux->psz_path ) == -1 )
 187     {
 188         free( p_sys );
 189         return VLC_EGENERIC;
 190     }
 191     i_len = strlen( psz_vobname );
 192     if( i_len >= 4 ) memcpy( psz_vobname + i_len - 4, ".sub", 4 );
 193
 194     /* open file */
 195     p_sys->p_vobsub_stream = stream_UrlNew( p_demux, psz_vobname );
 196     if( p_sys->p_vobsub_stream == NULL )
 197     {
 198         msg_Err( p_demux, "couldn't open .sub Vobsub file: %s",
 199                  psz_vobname );
 200         free( psz_vobname );
 201         free( p_sys );
 202         return VLC_EGENERIC;
 203     }
 204     free( psz_vobname );
 205
 206     return VLC_SUCCESS;
 207 }
 208
 209 /*****************************************************************************
 210  * Close: Close subtitle demux
 211  *****************************************************************************/
 212 static void Close( vlc_object_t *p_this )
 213 {
 214     int i;
 215     demux_t *p_demux = (demux_t*)p_this;
 216     demux_sys_t *p_sys = p_demux->p_sys;
 217
 218     /* Clean all subs from all tracks */
 219     for( i = 0; i < p_sys->i_tracks; i++ )
 220         free( p_sys->track[i].p_subtitles );
 221
 222     free( p_sys->track );
 223
 224     if( p_sys->p_vobsub_stream )
 225         stream_Delete( p_sys->p_vobsub_stream );
 226
 227     free( p_sys );
 228 }
 229
 230 /*****************************************************************************
 231  * Control:
 232  *****************************************************************************/
 233 static int Control( demux_t *p_demux, int i_query, va_list args )
 234 {
 235     demux_sys_t *p_sys = p_demux->p_sys;
 236     int64_t *pi64, i64;
 237     int i;
 238     double *pf, f;
 239
 240     switch( i_query )
 241     {
 242         case DEMUX_GET_LENGTH:
 243             pi64 = (int64_t*)va_arg( args, int64_t * );
 244             *pi64 = (int64_t) p_sys->i_length;
 245             return VLC_SUCCESS;
 246
 247         case DEMUX_GET_TIME:
 248             pi64 = (int64_t*)va_arg( args, int64_t * );
 249             for( i = 0; i < p_sys->i_tracks; i++ )
 250             {
 251                 bool b_selected;
 252                 /* Check the ES is selected */
 253                 es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
 254                                 p_sys->track[i].p_es, &b_selected );
 255                 if( b_selected ) break;
 256             }
 257             if( i < p_sys->i_tracks && p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles )
 258             {
 259                 *pi64 = p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start;
 260                 return VLC_SUCCESS;
 261             }
 262             return VLC_EGENERIC;
 263
 264         case DEMUX_SET_TIME:
 265             i64 = (int64_t)va_arg( args, int64_t );
 266             for( i = 0; i < p_sys->i_tracks; i++ )
 267             {
 268                 p_sys->track[i].i_current_subtitle = 0;
 269                 while( p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles &&
 270                        p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start < i64 )
 271                 {
 272                     p_sys->track[i].i_current_subtitle++;
 273                 }
 274
 275                 if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
 276                     return VLC_EGENERIC;
 277             }
 278             return VLC_SUCCESS;
 279
 280         case DEMUX_GET_POSITION:
 281             pf = (double*)va_arg( args, double * );
 282             for( i = 0; i < p_sys->i_tracks; i++ )
 283             {
 284                 bool b_selected;
 285                 /* Check the ES is selected */
 286                 es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
 287                                 p_sys->track[i].p_es, &b_selected );
 288                 if( b_selected ) break;
 289             }
 290             if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
 291             {
 292                 *pf = 1.0;
 293             }
 294             else if( p_sys->track[i].i_subtitles > 0 )
 295             {
 296                 *pf = (double)p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start /
 297                       (double)p_sys->i_length;
 298             }
 299             else
 300             {
 301                 *pf = 0.0;
 302             }
 303             return VLC_SUCCESS;
 304
 305         case DEMUX_SET_POSITION:
 306             f = (double)va_arg( args, double );
 307             i64 = (int64_t) f * p_sys->i_length;
 308
 309             for( i = 0; i < p_sys->i_tracks; i++ )
 310             {
 311                 p_sys->track[i].i_current_subtitle = 0;
 312                 while( p_sys->track[i].i_current_subtitle < p_sys->track[i].i_subtitles &&
 313                        p_sys->track[i].p_subtitles[p_sys->track[i].i_current_subtitle].i_start < i64 )
 314                 {
 315                     p_sys->track[i].i_current_subtitle++;
 316                 }
 317                 if( p_sys->track[i].i_current_subtitle >= p_sys->track[i].i_subtitles )
 318                     return VLC_EGENERIC;
 319             }
 320             return VLC_SUCCESS;
 321
 322         case DEMUX_SET_NEXT_DEMUX_TIME:
 323             p_sys->i_next_demux_date = (int64_t)va_arg( args, int64_t );
 324             return VLC_SUCCESS;
 325
 326         case DEMUX_GET_FPS:
 327         case DEMUX_GET_META:
 328         case DEMUX_GET_TITLE_INFO:
 329         case DEMUX_HAS_UNSUPPORTED_META:
 330         case DEMUX_GET_ATTACHMENTS:
 331         case DEMUX_CAN_RECORD:
 332             return VLC_EGENERIC;
 333
 334         default:
 335             msg_Warn( p_demux, "unknown query in subtitle control" );
 336             return VLC_EGENERIC;
 337     }
 338 }
 339
 340 /*****************************************************************************
 341  * Demux: Send subtitle to decoder
 342  *****************************************************************************/
 343 static int Demux( demux_t *p_demux )
 344 {
 345     demux_sys_t *p_sys = p_demux->p_sys;
 346     int64_t i_maxdate;
 347     int i, i_read;
 348
 349     for( i = 0; i < p_sys->i_tracks; i++ )
 350     {
 351 #define tk p_sys->track[i]
 352         if( tk.i_current_subtitle >= tk.i_subtitles )
 353             continue;
 354
 355         i_maxdate = p_sys->i_next_demux_date;
 356         if( i_maxdate <= 0 && tk.i_current_subtitle < tk.i_subtitles )
 357         {
 358             /* Should not happen */
 359             i_maxdate = tk.p_subtitles[tk.i_current_subtitle].i_start + 1;
 360         }
 361
 362         while( tk.i_current_subtitle < tk.i_subtitles &&
 363                tk.p_subtitles[tk.i_current_subtitle].i_start < i_maxdate )
 364         {
 365             int i_pos = tk.p_subtitles[tk.i_current_subtitle].i_vobsub_location;
 366             block_t *p_block;
 367             int i_size = 0;
 368
 369             /* first compute SPU size */
 370             if( tk.i_current_subtitle + 1 < tk.i_subtitles )
 371             {
 372                 i_size = tk.p_subtitles[tk.i_current_subtitle+1].i_vobsub_location - i_pos;
 373             }
 374             if( i_size <= 0 ) i_size = 65535;   /* Invalid or EOF */
 375
 376             /* Seek at the right place */
 377             if( stream_Seek( p_sys->p_vobsub_stream, i_pos ) )
 378             {
 379                 msg_Warn( p_demux,
 380                           "cannot seek in the VobSub to the correct time %d", i_pos );
 381                 tk.i_current_subtitle++;
 382                 continue;
 383             }
 384
 385             /* allocate a packet */
 386             if( ( p_block = block_New( p_demux, i_size ) ) == NULL )
 387             {
 388                 tk.i_current_subtitle++;
 389                 continue;
 390             }
 391
 392             /* read data */
 393             i_read = stream_Read( p_sys->p_vobsub_stream, p_block->p_buffer, i_size );
 394             if( i_read <= 6 )
 395             {
 396                 block_Release( p_block );
 397                 tk.i_current_subtitle++;
 398                 continue;
 399             }
 400             p_block->i_buffer = i_read;
 401
 402             /* pts */
 403             p_block->i_pts = tk.p_subtitles[tk.i_current_subtitle].i_start;
 404
 405             /* demux this block */
 406             DemuxVobSub( p_demux, p_block );
 407
 408             tk.i_current_subtitle++;
 409         }
 410 #undef tk
 411     }
 412
 413     /* */
 414     p_sys->i_next_demux_date = 0;
 415
 416     return 1;
 417 }
 418
 419 static int TextLoad( text_t *txt, stream_t *s )
 420 {
 421     char **lines = NULL;
 422     size_t n = 0;
 423
 424     /* load the complete file */
 425     for( ;; )
 426     {
 427         char *psz = stream_ReadLine( s );
 428         char **ppsz_new;
 429
 430         if( psz == NULL || (n >= INT_MAX/sizeof(char *)) )
 431             break;
 432
 433         ppsz_new = realloc( lines, (n + 1) * sizeof (char *) );
 434         if( ppsz_new == NULL )
 435         {
 436             free( psz );
 437             break;
 438         }
 439         lines = ppsz_new;
 440         lines[n++] = psz;
 441     }
 442
 443     txt->i_line_count = n;
 444     txt->i_line       = 0;
 445     txt->line         = lines;
 446
 447     return VLC_SUCCESS;
 448 }
 449
 450 static void TextUnload( text_t *txt )
 451 {
 452     int i;
 453
 454     for( i = 0; i < txt->i_line_count; i++ )
 455         free( txt->line[i] );
 456
 457     free( txt->line );
 458     txt->i_line       = 0;
 459     txt->i_line_count = 0;
 460 }
 461
 462 static char *TextGetLine( text_t *txt )
 463 {
 464     if( txt->i_line >= txt->i_line_count )
 465         return( NULL );
 466
 467     return txt->line[txt->i_line++];
 468 }
 469
 470 static int ParseVobSubIDX( demux_t *p_demux )
 471 {
 472     demux_sys_t *p_sys = p_demux->p_sys;
 473     text_t      *txt = &p_sys->txt;
 474     char        *line;
 475     vobsub_track_t *current_tk = NULL;
 476
 477     for( ;; )
 478     {
 479         if( ( line = TextGetLine( txt ) ) == NULL )
 480         {
 481             return( VLC_EGENERIC );
 482         }
 483
 484         if( *line == 0 || *line == '\r' || *line == '\n' || *line == '#' )
 485         {
 486             continue;
 487         }
 488         else if( !strncmp( "size:", line, 5 ) )
 489         {
 490             /* Store the original size of the video */
 491             if( sscanf( line, "size: %dx%d",
 492                         &p_sys->i_original_frame_width, &p_sys->i_original_frame_height ) == 2 )
 493             {
 494                 msg_Dbg( p_demux, "original frame size: %dx%d", p_sys->i_original_frame_width, p_sys->i_original_frame_height );
 495             }
 496             else
 497             {
 498                 msg_Warn( p_demux, "reading original frame size failed" );
 499             }
 500         }
 501         else if( !strncmp( "palette:", line, 8 ) )
 502         {
 503             int i;
 504
 505             /* Store the palette of the subs */
 506             if( sscanf( line, "palette: %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x, %x",
 507                         &p_sys->palette[0], &p_sys->palette[1], &p_sys->palette[2], &p_sys->palette[3],
 508                         &p_sys->palette[4], &p_sys->palette[5], &p_sys->palette[6], &p_sys->palette[7],
 509                         &p_sys->palette[8], &p_sys->palette[9], &p_sys->palette[10], &p_sys->palette[11],
 510                         &p_sys->palette[12], &p_sys->palette[13], &p_sys->palette[14], &p_sys->palette[15] ) == 16 )
 511             {
 512                 for( i = 0; i < 16; i++ )
 513                 {
 514                     uint8_t r = 0, g = 0, b = 0;
 515                     uint8_t y = 0, u = 0, v = 0;
 516                     r = (p_sys->palette[i] >> 16) & 0xff;
 517                     g = (p_sys->palette[i] >> 8) & 0xff;
 518                     b = (p_sys->palette[i] >> 0) & 0xff;
 519                     /* msg_Dbg( p_demux, "palette %d: R=%x, G=%x, B=%x", i, r, g, b ); */
 520                     y = (uint8_t) __MIN(abs(r * 2104 + g * 4130 + b * 802 + 4096 + 131072) >> 13, 235);
 521                     u = (uint8_t) __MIN(abs(r * -1214 + g * -2384 + b * 3598 + 4096 + 1048576) >> 13, 240);
 522                     v = (uint8_t) __MIN(abs(r * 3598 + g * -3013 + b * -585 + 4096 + 1048576) >> 13, 240);
 523                     p_sys->palette[i] = 0;
 524                     p_sys->palette[i] |= (y&0xff)<<16;
 525                     p_sys->palette[i] |= (u&0xff);
 526                     p_sys->palette[i] |= (v&0xff)<<8;
 527                     /* msg_Dbg( p_demux, "palette %d: y=%x, u=%x, v=%x", i, y, u, v ); */
 528
 529                 }
 530                 p_sys->b_palette = true;
 531                 msg_Dbg( p_demux, "vobsub palette read" );
 532             }
 533             else
 534             {
 535                 msg_Warn( p_demux, "reading original palette failed" );
 536             }
 537         }
 538         else if( !strncmp( "id:", line, 3 ) )
 539         {
 540             char language[20];
 541             int i_track_id;
 542             es_format_t fmt;
 543
 544             /* Lets start a new track */
 545             if( sscanf( line, "id: %2s, index: %d",
 546                         language, &i_track_id ) == 2 )
 547             {
 548                 p_sys->i_tracks++;
 549                 p_sys->track = realloc( p_sys->track, sizeof( vobsub_track_t ) * (p_sys->i_tracks + 1 ) );
 550
 551                 /* Init the track */
 552                 current_tk = &p_sys->track[p_sys->i_tracks - 1];
 553                 memset( current_tk, 0, sizeof( vobsub_track_t ) );
 554                 current_tk->i_current_subtitle = 0;
 555                 current_tk->i_subtitles = 0;
 556                 current_tk->p_subtitles = malloc( sizeof( subtitle_t ) );;
 557                 current_tk->i_track_id = i_track_id;
 558                 current_tk->i_delay = (int64_t)0;
 559
 560                 es_format_Init( &fmt, SPU_ES, VLC_CODEC_SPU );
 561                 fmt.subs.spu.i_original_frame_width = p_sys->i_original_frame_width;
 562                 fmt.subs.spu.i_original_frame_height = p_sys->i_original_frame_height;
 563                 fmt.psz_language = strdup( language );
 564                 if( p_sys->b_palette )
 565                 {
 566                     fmt.subs.spu.palette[0] = 0xBeef;
 567                     memcpy( &fmt.subs.spu.palette[1], p_sys->palette, 16 * sizeof( uint32_t ) );
 568                 }
 569
 570                 current_tk->p_es = es_out_Add( p_demux->out, &fmt );
 571                 msg_Dbg( p_demux, "new vobsub track detected" );
 572             }
 573             else
 574             {
 575                 msg_Warn( p_demux, "reading new track failed" );
 576             }
 577         }
 578         else if( !strncmp( line, "timestamp:", 10 ) )
 579         {
 580             /*
 581              * timestamp: [sign]hh:mm:ss:mss, filepos: loc
 582              * loc is the hex location of the spu in the .sub file
 583              */
 584             int h, m, s, ms, count, loc = 0;
 585             int i_sign = 1;
 586             int64_t i_start, i_location = 0;
 587
 588             if( p_sys->i_tracks > 0 &&
 589                 sscanf( line, "timestamp: %d%n:%d:%d:%d, filepos: %x",
 590                         &h, &count, &m, &s, &ms, &loc ) >= 5  )
 591             {
 592                 vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
 593                 subtitle_t *current_sub;
 594
 595                 if( line[count-3] == '-' )
 596                 {
 597                     i_sign = -1;
 598                     h = -h;
 599                 }
 600                 i_start = (int64_t) ( h * 3600*1000 +
 601                             m * 60*1000 +
 602                             s * 1000 +
 603                             ms ) * 1000;
 604                 i_location = loc;
 605
 606                 current_tk->i_subtitles++;
 607                 current_tk->p_subtitles = realloc( current_tk->p_subtitles, sizeof( subtitle_t ) * (current_tk->i_subtitles + 1 ) );
 608                 current_sub = &current_tk->p_subtitles[current_tk->i_subtitles - 1];
 609
 610                 current_sub->i_start = i_start * i_sign;
 611                 current_sub->i_start += current_tk->i_delay;
 612                 current_sub->i_vobsub_location = i_location;
 613             }
 614             else
 615             {
 616                 msg_Warn( p_demux, "reading timestamp failed" );
 617             }
 618         }
 619         else if( !strncasecmp( line, "delay:", 6 ) )
 620         {
 621             /*
 622              * delay: [sign]hh:mm:ss:mss
 623              */
 624             int h, m, s, ms, count = 0;
 625             int i_sign = 1;
 626             int64_t i_gap = 0;
 627
 628             if( p_sys->i_tracks > 0 &&
 629                 sscanf( line, "%*celay: %d%n:%d:%d:%d",
 630                         &h, &count, &m, &s, &ms ) >= 4 )
 631             {
 632                 vobsub_track_t *current_tk = &p_sys->track[p_sys->i_tracks - 1];
 633                 if( line[count-3] == '-' )
 634                 {
 635                     i_sign = -1;
 636                     h = -h;
 637                 }
 638                 i_gap = (int64_t) ( h * 3600*1000 +
 639                             m * 60*1000 +
 640                             s * 1000 +
 641                             ms ) * 1000;
 642
 643                 current_tk->i_delay = current_tk->i_delay + (i_gap * i_sign);
 644                 msg_Dbg( p_demux, "sign: %+d gap: %+lld global delay: %+lld",
 645                          i_sign, (long long)i_gap,
 646                          (long long)current_tk->i_delay  );
 647             }
 648             else
 649             {
 650                 msg_Warn( p_demux, "reading delay failed" );
 651             }
 652         }
 653     }
 654     return( 0 );
 655 }
 656
 657 static int DemuxVobSub( demux_t *p_demux, block_t *p_bk )
 658 {
 659     demux_sys_t *p_sys = p_demux->p_sys;
 660     uint8_t     *p = p_bk->p_buffer;
 661     uint8_t     *p_end = &p_bk->p_buffer[p_bk->i_buffer];
 662     int i;
 663
 664     while( p + 6 < p_end )
 665     {
 666         int i_size = ps_pkt_size( p, p_end - p );
 667         block_t *p_pkt;
 668         int      i_id;
 669         int      i_spu;
 670
 671         if( i_size <= 0 )
 672             break;
 673
 674         if( i_size > p_end - p )
 675         {
 676             msg_Warn( p_demux, "broken PES size" );
 677             break;
 678         }
 679
 680         if( p[0] != 0 || p[1] != 0 || p[2] != 0x01 )
 681         {
 682             msg_Warn( p_demux, "invalid PES" );
 683             break;
 684         }
 685
 686         if( p[3] != 0xbd )
 687         {
 688             /* msg_Dbg( p_demux, "we don't need these ps packets (id=0x1%2.2x)", p[3] ); */
 689             p += i_size;
 690             continue;
 691         }
 692
 693         /* Create a block */
 694         p_pkt = block_New( p_demux, i_size );
 695         memcpy( p_pkt->p_buffer, p, i_size);
 696         p += i_size;
 697
 698         i_id = ps_pkt_id( p_pkt );
 699         if( (i_id&0xffe0) != 0xbd20 ||
 700             ps_pkt_parse_pes( p_pkt, 1 ) )
 701         {
 702             block_Release( p_pkt );
 703             continue;
 704         }
 705         i_spu = i_id&0x1f;
 706         /* msg_Dbg( p_demux, "SPU track %d size %d", i_spu, i_size ); */
 707
 708         for( i = 0; i < p_sys->i_tracks; i++ )
 709         {
 710             vobsub_track_t *p_tk = &p_sys->track[i];
 711
 712             p_pkt->i_dts = p_pkt->i_pts = p_bk->i_pts;
 713             p_pkt->i_length = 0;
 714
 715             if( p_tk->p_es && p_tk->i_track_id == i_spu )
 716             {
 717                 es_out_Send( p_demux->out, p_tk->p_es, p_pkt );
 718                 p_bk->i_pts = 0;     /*only first packet has a pts */
 719                 break;
 720             }
 721         }
 722         if( i >= p_sys->i_tracks )
 723         {
 724             block_Release( p_pkt );
 725         }
 726     }
 727
 728     return VLC_SUCCESS;
 729 }
 730