git.sesse.net Git - vlc/blob - modules/demux/mkv/mkv.cpp

   1 /*****************************************************************************
   2  * mkv.cpp : matroska demuxer
   3  *****************************************************************************
   4  * Copyright (C) 2003-2005, 2008, 2010 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Steve Lhomme <steve.lhomme@free.fr>
   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 #include "mkv.hpp"
  26 #include "util.hpp"
  27
  28 #include "matroska_segment.hpp"
  29 #include "demux.hpp"
  30
  31 #include "chapters.hpp"
  32 #include "Ebml_parser.hpp"
  33
  34 #include "stream_io_callback.hpp"
  35
  36 #include <vlc_fs.h>
  37 #include <vlc_url.h>
  38
  39 /*****************************************************************************
  40  * Module descriptor
  41  *****************************************************************************/
  42 static int  Open ( vlc_object_t * );
  43 static void Close( vlc_object_t * );
  44
  45 vlc_module_begin ()
  46     set_shortname( "Matroska" )
  47     set_description( N_("Matroska stream demuxer" ) )
  48     set_capability( "demux", 50 )
  49     set_callbacks( Open, Close )
  50     set_category( CAT_INPUT )
  51     set_subcategory( SUBCAT_INPUT_DEMUX )
  52
  53     add_bool( "mkv-use-ordered-chapters", true,
  54             N_("Respect ordered chapters"),
  55             N_("Play chapters in the order specified in the segment."), false );
  56
  57     add_bool( "mkv-use-chapter-codec", true,
  58             N_("Chapter codecs"),
  59             N_("Use chapter codecs found in the segment."), true );
  60
  61     add_bool( "mkv-preload-local-dir", true,
  62             N_("Preload MKV files in the same directory"),
  63             N_("Preload matroska files in the same directory to find linked segments (not good for broken files)."), false );
  64
  65     add_bool( "mkv-seek-percent", false,
  66             N_("Seek based on percent not time"),
  67             N_("Seek based on percent not time."), true );
  68
  69     add_bool( "mkv-use-dummy", false,
  70             N_("Dummy Elements"),
  71             N_("Read and discard unknown EBML elements (not good for broken files)."), true );
  72
  73     add_shortcut( "mka", "mkv" )
  74 vlc_module_end ()
  75
  76 class demux_sys_t;
  77
  78 static int  Demux  ( demux_t * );
  79 static int  Control( demux_t *, int, va_list );
  80 static void Seek   ( demux_t *, mtime_t i_date, double f_percent, virtual_chapter_c *p_chapter );
  81
  82 /*****************************************************************************
  83  * Open: initializes matroska demux structures
  84  *****************************************************************************/
  85 static int Open( vlc_object_t * p_this )
  86 {
  87     demux_t            *p_demux = (demux_t*)p_this;
  88     demux_sys_t        *p_sys;
  89     matroska_stream_c  *p_stream;
  90     matroska_segment_c *p_segment;
  91     const uint8_t      *p_peek;
  92     std::string         s_path, s_filename;
  93     vlc_stream_io_callback *p_io_callback;
  94     EbmlStream         *p_io_stream;
  95     bool                b_need_preload = false;
  96
  97     /* peek the begining */
  98     if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
  99
 100     /* is a valid file */
 101     if( p_peek[0] != 0x1a || p_peek[1] != 0x45 ||
 102         p_peek[2] != 0xdf || p_peek[3] != 0xa3 ) return VLC_EGENERIC;
 103
 104     /* Set the demux function */
 105     p_demux->pf_demux   = Demux;
 106     p_demux->pf_control = Control;
 107     p_demux->p_sys      = p_sys = new demux_sys_t( *p_demux );
 108
 109     p_io_callback = new vlc_stream_io_callback( p_demux->s, false );
 110     p_io_stream = new EbmlStream( *p_io_callback );
 111
 112     if( p_io_stream == NULL )
 113     {
 114         msg_Err( p_demux, "failed to create EbmlStream" );
 115         delete p_io_callback;
 116         delete p_sys;
 117         return VLC_EGENERIC;
 118     }
 119
 120     p_stream = p_sys->AnalyseAllSegmentsFound( p_demux, p_io_stream, true );
 121     if( p_stream == NULL )
 122     {
 123         msg_Err( p_demux, "cannot find KaxSegment or missing mandatory KaxInfo" );
 124         goto error;
 125     }
 126     p_sys->streams.push_back( p_stream );
 127
 128     p_stream->p_io_callback = p_io_callback;
 129     p_stream->p_estream = p_io_stream;
 130
 131     for (size_t i=0; i<p_stream->segments.size(); i++)
 132     {
 133         p_stream->segments[i]->Preload();
 134         b_need_preload |= p_stream->segments[i]->b_ref_external_segments;
 135     }
 136
 137     p_segment = p_stream->segments[0];
 138     if( p_segment->cluster == NULL )
 139     {
 140         msg_Err( p_demux, "cannot find any cluster, damaged file ?" );
 141         goto error;
 142     }
 143
 144     if (b_need_preload && var_InheritBool( p_demux, "mkv-preload-local-dir" ))
 145     {
 146         msg_Dbg( p_demux, "Preloading local dir" );
 147         /* get the files from the same dir from the same family (based on p_demux->psz_path) */
 148         if ( p_demux->psz_file && !strcmp( p_demux->psz_access, "file" ) )
 149         {
 150             // assume it's a regular file
 151             // get the directory path
 152             s_path = p_demux->psz_file;
 153             if (s_path.at(s_path.length() - 1) == DIR_SEP_CHAR)
 154             {
 155                 s_path = s_path.substr(0,s_path.length()-1);
 156             }
 157             else
 158             {
 159                 if (s_path.find_last_of(DIR_SEP_CHAR) > 0)
 160                 {
 161                     s_path = s_path.substr(0,s_path.find_last_of(DIR_SEP_CHAR));
 162                 }
 163             }
 164
 165             DIR *p_src_dir = vlc_opendir(s_path.c_str());
 166
 167             if (p_src_dir != NULL)
 168             {
 169                 char *psz_file;
 170                 while ((psz_file = vlc_readdir(p_src_dir)) != NULL)
 171                 {
 172                     if (strlen(psz_file) > 4)
 173                     {
 174                         s_filename = s_path + DIR_SEP_CHAR + psz_file;
 175
 176 #if defined(WIN32) || defined(__OS2__)
 177                         if (!strcasecmp(s_filename.c_str(), p_demux->psz_file))
 178 #else
 179                         if (!s_filename.compare(p_demux->psz_file))
 180 #endif
 181                         {
 182                             free (psz_file);
 183                             continue; // don't reuse the original opened file
 184                         }
 185
 186                         if (!s_filename.compare(s_filename.length() - 3, 3, "mkv") ||
 187                             !s_filename.compare(s_filename.length() - 3, 3, "mka"))
 188                         {
 189                             // test whether this file belongs to our family
 190                             const uint8_t *p_peek;
 191                             bool          file_ok = false;
 192 #warning Memory leak!
 193                             std::string   s_url = vlc_path2uri( s_filename.c_str(), "file" );
 194                             stream_t      *p_file_stream = stream_UrlNew(
 195                                                             p_demux,
 196                                                             s_url.c_str() );
 197                             /* peek the begining */
 198                             if( p_file_stream &&
 199                                 stream_Peek( p_file_stream, &p_peek, 4 ) >= 4
 200                                 && p_peek[0] == 0x1a && p_peek[1] == 0x45 &&
 201                                 p_peek[2] == 0xdf && p_peek[3] == 0xa3 ) file_ok = true;
 202
 203                             if ( file_ok )
 204                             {
 205                                 vlc_stream_io_callback *p_file_io = new vlc_stream_io_callback( p_file_stream, true );
 206                                 EbmlStream *p_estream = new EbmlStream(*p_file_io);
 207
 208                                 p_stream = p_sys->AnalyseAllSegmentsFound( p_demux, p_estream );
 209
 210                                 if ( p_stream == NULL )
 211                                 {
 212                                     msg_Dbg( p_demux, "the file '%s' will not be used", s_filename.c_str() );
 213                                     delete p_estream;
 214                                     delete p_file_io;
 215                                 }
 216                                 else
 217                                 {
 218                                     p_stream->p_io_callback = p_file_io;
 219                                     p_stream->p_estream = p_estream;
 220                                     p_sys->streams.push_back( p_stream );
 221                                 }
 222                             }
 223                             else
 224                             {
 225                                 if( p_file_stream ) {
 226                                     stream_Delete( p_file_stream );
 227                                 }
 228                                 msg_Dbg( p_demux, "the file '%s' cannot be opened", s_filename.c_str() );
 229                             }
 230                         }
 231                     }
 232                     free (psz_file);
 233                 }
 234                 closedir( p_src_dir );
 235             }
 236         }
 237
 238         p_sys->PreloadFamily( *p_segment );
 239     }
 240     else if (b_need_preload)
 241         msg_Warn( p_demux, "This file references other files, you may want to enable the preload of local directory");
 242
 243     if ( !p_sys->PreloadLinked() ||
 244          !p_sys->PreparePlayback( NULL ) )
 245     {
 246         msg_Err( p_demux, "cannot use the segment" );
 247         goto error;
 248     }
 249
 250     p_sys->InitUi();
 251
 252     return VLC_SUCCESS;
 253
 254 error:
 255     delete p_sys;
 256     return VLC_EGENERIC;
 257 }
 258
 259 /*****************************************************************************
 260  * Close: frees unused data
 261  *****************************************************************************/
 262 static void Close( vlc_object_t *p_this )
 263 {
 264     demux_t     *p_demux = (demux_t*)p_this;
 265     demux_sys_t *p_sys   = p_demux->p_sys;
 266     virtual_segment_c *p_vsegment = p_sys->p_current_segment;
 267     if( p_vsegment )
 268     {
 269         matroska_segment_c *p_segment = p_vsegment->CurrentSegment();
 270         if( p_segment )
 271             p_segment->UnSelect();
 272     }
 273
 274     delete p_sys;
 275 }
 276
 277 /*****************************************************************************
 278  * Control:
 279  *****************************************************************************/
 280 static int Control( demux_t *p_demux, int i_query, va_list args )
 281 {
 282     demux_sys_t        *p_sys = p_demux->p_sys;
 283     int64_t     *pi64, i64;
 284     double      *pf, f;
 285     int         i_skp;
 286     size_t      i_idx;
 287
 288     vlc_meta_t *p_meta;
 289     input_attachment_t ***ppp_attach;
 290     int *pi_int;
 291
 292     switch( i_query )
 293     {
 294         case DEMUX_GET_ATTACHMENTS:
 295             ppp_attach = (input_attachment_t***)va_arg( args, input_attachment_t*** );
 296             pi_int = (int*)va_arg( args, int * );
 297
 298             if( p_sys->stored_attachments.size() <= 0 )
 299                 return VLC_EGENERIC;
 300
 301             *pi_int = p_sys->stored_attachments.size();
 302             *ppp_attach = (input_attachment_t**)malloc( sizeof(input_attachment_t**) *
 303                                                         p_sys->stored_attachments.size() );
 304             if( !(*ppp_attach) )
 305                 return VLC_ENOMEM;
 306             for( size_t i = 0; i < p_sys->stored_attachments.size(); i++ )
 307             {
 308                 attachment_c *a = p_sys->stored_attachments[i];
 309                 (*ppp_attach)[i] = vlc_input_attachment_New( a->fileName(), a->mimeType(), NULL,
 310                                                              a->p_data, a->size() );
 311             }
 312             return VLC_SUCCESS;
 313
 314         case DEMUX_GET_META:
 315             p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
 316             vlc_meta_Merge( p_meta, p_sys->meta );
 317             return VLC_SUCCESS;
 318
 319         case DEMUX_GET_LENGTH:
 320             pi64 = (int64_t*)va_arg( args, int64_t * );
 321             if( p_sys->f_duration > 0.0 )
 322             {
 323                 *pi64 = (int64_t)(p_sys->f_duration * 1000);
 324                 return VLC_SUCCESS;
 325             }
 326             return VLC_EGENERIC;
 327
 328         case DEMUX_GET_POSITION:
 329             pf = (double*)va_arg( args, double * );
 330             if ( p_sys->f_duration > 0.0 )
 331                 *pf = (double)(p_sys->i_pts >= p_sys->i_start_pts ? p_sys->i_pts : p_sys->i_start_pts ) / (1000.0 * p_sys->f_duration);
 332             return VLC_SUCCESS;
 333
 334         case DEMUX_SET_POSITION:
 335             if( p_sys->f_duration > 0.0 )
 336             {
 337                 f = (double)va_arg( args, double );
 338                 Seek( p_demux, -1, f, NULL );
 339                 return VLC_SUCCESS;
 340             }
 341             return VLC_EGENERIC;
 342
 343         case DEMUX_GET_TIME:
 344             pi64 = (int64_t*)va_arg( args, int64_t * );
 345             *pi64 = p_sys->i_pts;
 346             return VLC_SUCCESS;
 347
 348         case DEMUX_GET_TITLE_INFO:
 349             if( p_sys->titles.size() > 1 || ( p_sys->titles.size() == 1 && p_sys->titles[0]->i_seekpoint > 0 ) )
 350             {
 351                 input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 352                 int *pi_int    = (int*)va_arg( args, int* );
 353
 354                 *pi_int = p_sys->titles.size();
 355                 *ppp_title = (input_title_t**)malloc( sizeof( input_title_t**) * p_sys->titles.size() );
 356
 357                 for( size_t i = 0; i < p_sys->titles.size(); i++ )
 358                 {
 359                     (*ppp_title)[i] = vlc_input_title_Duplicate( p_sys->titles[i] );
 360                 }
 361                 return VLC_SUCCESS;
 362             }
 363             return VLC_EGENERIC;
 364
 365         case DEMUX_SET_TITLE:
 366             /* TODO handle editions as titles */
 367             i_idx = (int)va_arg( args, int );
 368             if( i_idx < p_sys->used_segments.size() )
 369             {
 370                 p_sys->JumpTo( *p_sys->used_segments[i_idx], NULL );
 371                 return VLC_SUCCESS;
 372             }
 373             return VLC_EGENERIC;
 374
 375         case DEMUX_SET_SEEKPOINT:
 376             i_skp = (int)va_arg( args, int );
 377
 378             // TODO change the way it works with the << & >> buttons on the UI (+1/-1 instead of a number)
 379             if( p_sys->titles.size() && i_skp < p_sys->titles[p_sys->i_current_title]->i_seekpoint)
 380             {
 381                 Seek( p_demux, (int64_t)p_sys->titles[p_sys->i_current_title]->seekpoint[i_skp]->i_time_offset, -1, NULL);
 382                 p_demux->info.i_seekpoint |= INPUT_UPDATE_SEEKPOINT;
 383                 p_demux->info.i_seekpoint = i_skp;
 384                 return VLC_SUCCESS;
 385             }
 386             return VLC_EGENERIC;
 387
 388         case DEMUX_GET_FPS:
 389             pf = (double *)va_arg( args, double * );
 390             *pf = 0.0;
 391             if( p_sys->p_current_segment && p_sys->p_current_segment->CurrentSegment() )
 392             {
 393                 const matroska_segment_c *p_segment = p_sys->p_current_segment->CurrentSegment();
 394                 for( size_t i = 0; i < p_segment->tracks.size(); i++ )
 395                 {
 396                     mkv_track_t *tk = p_segment->tracks[i];
 397                     if( tk->fmt.i_cat == VIDEO_ES && tk->fmt.video.i_frame_rate_base > 0 )
 398                     {
 399                         *pf = (double)tk->fmt.video.i_frame_rate / tk->fmt.video.i_frame_rate_base;
 400                         break;
 401                     }
 402                 }
 403             }
 404             return VLC_SUCCESS;
 405
 406         case DEMUX_SET_TIME:
 407             i64 = (int64_t) va_arg( args, int64_t );
 408             msg_Dbg(p_demux,"SET_TIME to %"PRId64, i64 );
 409             Seek( p_demux, i64, -1, NULL );
 410             return VLC_SUCCESS;
 411         default:
 412             return VLC_EGENERIC;
 413     }
 414 }
 415
 416 /* Seek */
 417 static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, virtual_chapter_c *p_chapter )
 418 {
 419     demux_sys_t        *p_sys = p_demux->p_sys;
 420     virtual_segment_c  *p_vsegment = p_sys->p_current_segment;
 421     matroska_segment_c *p_segment = p_vsegment->CurrentSegment();
 422     mtime_t            i_time_offset = 0;
 423     int64_t            i_global_position = -1;
 424
 425     int         i_index;
 426
 427     msg_Dbg( p_demux, "seek request to %"PRId64" (%f%%)", i_date, f_percent );
 428     if( i_date < 0 && f_percent < 0 )
 429     {
 430         msg_Warn( p_demux, "cannot seek nowhere!" );
 431         return;
 432     }
 433     if( f_percent > 1.0 )
 434     {
 435         msg_Warn( p_demux, "cannot seek so far!" );
 436         return;
 437     }
 438     if( p_sys->f_duration < 0 )
 439     {
 440         msg_Warn( p_demux, "cannot seek without duration!");
 441         return;
 442     }
 443
 444     /* seek without index or without date */
 445     if( f_percent >= 0 && (var_InheritBool( p_demux, "mkv-seek-percent" ) || !p_segment->b_cues || i_date < 0 ))
 446     {
 447         i_date = int64_t( f_percent * p_sys->f_duration * 1000.0 );
 448         if( !p_segment->b_cues )
 449         {
 450             int64_t i_pos = int64_t( f_percent * stream_Size( p_demux->s ) );
 451
 452             msg_Dbg( p_demux, "lengthy way of seeking for pos:%"PRId64, i_pos );
 453             for( i_index = 0; i_index < p_segment->i_index; i_index++ )
 454             {
 455                 if( p_segment->p_indexes[i_index].i_position >= i_pos &&
 456                     p_segment->p_indexes[i_index].i_time > 0 )
 457                     break;
 458             }
 459             if( i_index == p_segment->i_index )
 460                 i_index--;
 461
 462             if( p_segment->p_indexes[i_index].i_position < i_pos )
 463             {
 464                 msg_Dbg( p_demux, "no cues, seek request to global pos: %"PRId64, i_pos );
 465                 i_global_position = i_pos;
 466             }
 467         }
 468     }
 469     p_vsegment->Seek( *p_demux, i_date, i_time_offset, p_chapter, i_global_position );
 470 }
 471
 472 /* Needed by matroska_segment::Seek() and Seek */
 473 void BlockDecode( demux_t *p_demux, KaxBlock *block, KaxSimpleBlock *simpleblock,
 474                          mtime_t i_pts, mtime_t i_duration, bool f_mandatory )
 475 {
 476     demux_sys_t        *p_sys = p_demux->p_sys;
 477     matroska_segment_c *p_segment = p_sys->p_current_segment->CurrentSegment();
 478
 479     if( !p_segment ) return;
 480
 481     size_t          i_track;
 482     if( p_segment->BlockFindTrackIndex( &i_track, block, simpleblock ) )
 483     {
 484         msg_Err( p_demux, "invalid track number" );
 485         return;
 486     }
 487
 488     mkv_track_t *tk = p_segment->tracks[i_track];
 489
 490     if( tk->fmt.i_cat != NAV_ES && tk->p_es == NULL )
 491     {
 492         msg_Err( p_demux, "unknown track number" );
 493         return;
 494     }
 495     if( i_pts + i_duration < p_sys->i_start_pts && tk->fmt.i_cat == AUDIO_ES )
 496     {
 497         return; /* discard audio packets that shouldn't be rendered */
 498     }
 499
 500     if ( tk->fmt.i_cat != NAV_ES )
 501     {
 502         bool b;
 503         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
 504
 505         if( !b )
 506         {
 507             tk->b_inited = false;
 508             if( tk->fmt.i_cat == VIDEO_ES || tk->fmt.i_cat == AUDIO_ES )
 509                 tk->i_last_dts = i_pts;
 510             return;
 511         }
 512     }
 513
 514
 515     /* First send init data */
 516     if( !tk->b_inited && tk->i_data_init > 0 )
 517     {
 518         block_t *p_init;
 519
 520         msg_Dbg( p_demux, "sending header (%d bytes)", tk->i_data_init );
 521         p_init = MemToBlock( tk->p_data_init, tk->i_data_init, 0 );
 522         if( p_init ) es_out_Send( p_demux->out, tk->p_es, p_init );
 523     }
 524     tk->b_inited = true;
 525
 526
 527     size_t frame_size = 0;
 528     size_t block_size = 0;
 529
 530     if( simpleblock != NULL )
 531         block_size = simpleblock->GetSize();
 532     else
 533         block_size = block->GetSize();
 534
 535     for( unsigned int i = 0;
 536          ( block != NULL && i < block->NumberFrames()) || ( simpleblock != NULL && i < simpleblock->NumberFrames() );
 537          i++ )
 538     {
 539         block_t *p_block;
 540         DataBuffer *data;
 541         if( simpleblock != NULL )
 542         {
 543             data = &simpleblock->GetBuffer(i);
 544             // condition when the DTS is correct (keyframe or B frame == NOT P frame)
 545             f_mandatory = simpleblock->IsDiscardable() || simpleblock->IsKeyframe();
 546         }
 547         else
 548         {
 549             data = &block->GetBuffer(i);
 550             // condition when the DTS is correct (keyframe or B frame == NOT P frame)
 551         }
 552         frame_size += data->Size();
 553         if( !data->Buffer() || data->Size() > SIZE_MAX || frame_size > block_size  )
 554         {
 555             msg_Warn( p_demux, "Cannot read frame (too long or no frame)" );
 556             break;
 557         }
 558
 559         if( tk->i_compression_type == MATROSKA_COMPRESSION_HEADER && tk->p_compression_data != NULL )
 560             p_block = MemToBlock( data->Buffer(), data->Size(), tk->p_compression_data->GetSize() );
 561         else
 562             p_block = MemToBlock( data->Buffer(), data->Size(), 0 );
 563
 564         if( p_block == NULL )
 565         {
 566             break;
 567         }
 568
 569 #if defined(HAVE_ZLIB_H)
 570         if( tk->i_compression_type == MATROSKA_COMPRESSION_ZLIB )
 571         {
 572             p_block = block_zlib_decompress( VLC_OBJECT(p_demux), p_block );
 573             if( p_block == NULL )
 574                 break;
 575         }
 576         else
 577 #endif
 578         if( tk->i_compression_type == MATROSKA_COMPRESSION_HEADER )
 579         {
 580             memcpy( p_block->p_buffer, tk->p_compression_data->GetBuffer(), tk->p_compression_data->GetSize() );
 581         }
 582
 583         if( tk->fmt.i_codec == VLC_CODEC_COOK ||
 584             tk->fmt.i_codec == VLC_CODEC_ATRAC3 )
 585         {
 586             handle_real_audio(p_demux, tk, p_block, i_pts);
 587             block_Release(p_block);
 588             i_pts = ( tk->i_default_duration )?
 589                 i_pts + ( mtime_t )( tk->i_default_duration / 1000 ):
 590                 VLC_TS_INVALID;
 591             continue;
 592         }
 593
 594         if ( tk->fmt.i_cat == NAV_ES )
 595         {
 596             // TODO handle the start/stop times of this packet
 597             p_sys->p_ev->SetPci( (const pci_t *)&p_block->p_buffer[1]);
 598             block_Release( p_block );
 599             return;
 600         }
 601         // correct timestamping when B frames are used
 602         if( tk->fmt.i_cat != VIDEO_ES )
 603         {
 604             p_block->i_dts = p_block->i_pts = i_pts;
 605         }
 606         else
 607         {
 608             if( tk->b_dts_only )
 609             {
 610                 p_block->i_pts = VLC_TS_INVALID;
 611                 p_block->i_dts = i_pts;
 612             }
 613             else if( tk->b_pts_only )
 614             {
 615                 p_block->i_pts = i_pts;
 616                 p_block->i_dts = i_pts;
 617             }
 618             else
 619             {
 620                 p_block->i_pts = i_pts;
 621                 if ( f_mandatory )
 622                     p_block->i_dts = p_block->i_pts;
 623                 else
 624                     p_block->i_dts = min( i_pts, tk->i_last_dts + ( mtime_t )( tk->i_default_duration / 1000 ) );
 625             }
 626         }
 627         if( tk->fmt.i_cat == VIDEO_ES || tk->fmt.i_cat == AUDIO_ES )
 628             tk->i_last_dts = p_block->i_dts;
 629
 630 #if 0
 631 msg_Dbg( p_demux, "block i_dts: %"PRId64" / i_pts: %"PRId64, p_block->i_dts, p_block->i_pts);
 632 #endif
 633         if( strcmp( tk->psz_codec, "S_VOBSUB" ) )
 634         {
 635             p_block->i_length = i_duration * 1000;
 636         }
 637
 638         /* FIXME remove when VLC_TS_INVALID work is done */
 639         if( i == 0 || p_block->i_dts > VLC_TS_INVALID )
 640             p_block->i_dts += VLC_TS_0;
 641         if( !tk->b_dts_only && ( i == 0 || p_block->i_pts > VLC_TS_INVALID ) )
 642             p_block->i_pts += VLC_TS_0;
 643
 644         es_out_Send( p_demux->out, tk->p_es, p_block );
 645
 646         /* use time stamp only for first block */
 647         i_pts = ( tk->i_default_duration )?
 648                  i_pts + ( mtime_t )( tk->i_default_duration / 1000 ):
 649                  VLC_TS_INVALID;
 650     }
 651 }
 652
 653 /*****************************************************************************
 654  * Demux: reads and demuxes data packets
 655  *****************************************************************************
 656  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 657  *****************************************************************************/
 658 static int Demux( demux_t *p_demux)
 659 {
 660     demux_sys_t        *p_sys = p_demux->p_sys;
 661
 662     vlc_mutex_lock( &p_sys->lock_demuxer );
 663
 664     virtual_segment_c  *p_vsegment = p_sys->p_current_segment;
 665     matroska_segment_c *p_segment = p_vsegment->CurrentSegment();
 666     if ( p_segment == NULL ) return 0;
 667     int                i_block_count = 0;
 668     int                i_return = 0;
 669
 670     for( ;; )
 671     {
 672         if ( p_sys->demuxer.b_die )
 673             break;
 674
 675         if( p_sys->i_pts >= p_sys->i_start_pts  )
 676             if ( p_vsegment->UpdateCurrentToChapter( *p_demux ) )
 677             {
 678                 i_return = 1;
 679                 break;
 680             }
 681
 682         if ( p_vsegment->CurrentEdition() &&
 683              p_vsegment->CurrentEdition()->b_ordered &&
 684              p_vsegment->CurrentChapter() == NULL )
 685             /* nothing left to read in this ordered edition */
 686             break;
 687
 688         KaxBlock *block;
 689         KaxSimpleBlock *simpleblock;
 690         int64_t i_block_duration = 0;
 691         bool b_key_picture;
 692         bool b_discardable_picture;
 693         if( p_segment->BlockGet( block, simpleblock, &b_key_picture, &b_discardable_picture, &i_block_duration ) )
 694         {
 695             if ( p_vsegment->CurrentEdition() && p_vsegment->CurrentEdition()->b_ordered )
 696             {
 697                 const virtual_chapter_c *p_chap = p_vsegment->CurrentChapter();
 698                 // check if there are more chapters to read
 699                 if ( p_chap != NULL )
 700                 {
 701                     /* TODO handle successive chapters with the same user_start_time/user_end_time
 702                     */
 703                     p_sys->i_pts = p_chap->i_virtual_stop_time;
 704                     p_sys->i_pts++; // trick to avoid staying on segments with no duration and no content
 705
 706                     i_return = 1;
 707                 }
 708
 709                 break;
 710             }
 711             else
 712             {
 713                 msg_Warn( p_demux, "cannot get block EOF?" );
 714                 break;
 715             }
 716         }
 717
 718         if( simpleblock != NULL )
 719             p_sys->i_pts = p_sys->i_chapter_time + ( simpleblock->GlobalTimecode() / (mtime_t) 1000 );
 720         else
 721             p_sys->i_pts = p_sys->i_chapter_time + ( block->GlobalTimecode() / (mtime_t) 1000 );
 722
 723         mtime_t i_pcr = VLC_TS_INVALID;
 724         for( size_t i = 0; i < p_segment->tracks.size(); i++)
 725             if( p_segment->tracks[i]->i_last_dts > VLC_TS_INVALID &&
 726                 ( p_segment->tracks[i]->i_last_dts < i_pcr || i_pcr == VLC_TS_INVALID ))
 727                 i_pcr = p_segment->tracks[i]->i_last_dts;
 728
 729         if( i_pcr > p_sys->i_pcr + 300000 )
 730         {
 731             es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + p_sys->i_pcr );
 732             p_sys->i_pcr = i_pcr;
 733         }
 734
 735         if( p_sys->i_pts >= p_sys->i_start_pts  )
 736         {
 737             if ( p_vsegment->UpdateCurrentToChapter( *p_demux ) )
 738             {
 739                 i_return = 1;
 740                 delete block;
 741                 break;
 742             }
 743         }
 744
 745         if ( p_vsegment->CurrentEdition() &&
 746              p_vsegment->CurrentEdition()->b_ordered &&
 747              p_vsegment->CurrentChapter() == NULL )
 748         {
 749             /* nothing left to read in this ordered edition */
 750             delete block;
 751             break;
 752         }
 753
 754         BlockDecode( p_demux, block, simpleblock, p_sys->i_pts, i_block_duration, b_key_picture || b_discardable_picture );
 755
 756         delete block;
 757         i_block_count++;
 758
 759         // TODO optimize when there is need to leave or when seeking has been called
 760         if( i_block_count > 5 )
 761         {
 762             i_return = 1;
 763             break;
 764         }
 765     }
 766
 767     vlc_mutex_unlock( &p_sys->lock_demuxer );
 768
 769     return i_return;
 770 }
 771