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 VLC authors and VideoLAN
   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 it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * 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->FreeUnused();
 251
 252     p_sys->InitUi();
 253
 254     return VLC_SUCCESS;
 255
 256 error:
 257     delete p_sys;
 258     return VLC_EGENERIC;
 259 }
 260
 261 /*****************************************************************************
 262  * Close: frees unused data
 263  *****************************************************************************/
 264 static void Close( vlc_object_t *p_this )
 265 {
 266     demux_t     *p_demux = (demux_t*)p_this;
 267     demux_sys_t *p_sys   = p_demux->p_sys;
 268     virtual_segment_c *p_vsegment = p_sys->p_current_segment;
 269     if( p_vsegment )
 270     {
 271         matroska_segment_c *p_segment = p_vsegment->CurrentSegment();
 272         if( p_segment )
 273             p_segment->UnSelect();
 274     }
 275
 276     delete p_sys;
 277 }
 278
 279 /*****************************************************************************
 280  * Control:
 281  *****************************************************************************/
 282 static int Control( demux_t *p_demux, int i_query, va_list args )
 283 {
 284     demux_sys_t        *p_sys = p_demux->p_sys;
 285     int64_t     *pi64, i64;
 286     double      *pf, f;
 287     int         i_skp;
 288     size_t      i_idx;
 289
 290     vlc_meta_t *p_meta;
 291     input_attachment_t ***ppp_attach;
 292     int *pi_int;
 293
 294     switch( i_query )
 295     {
 296         case DEMUX_GET_ATTACHMENTS:
 297             ppp_attach = (input_attachment_t***)va_arg( args, input_attachment_t*** );
 298             pi_int = (int*)va_arg( args, int * );
 299
 300             if( p_sys->stored_attachments.size() <= 0 )
 301                 return VLC_EGENERIC;
 302
 303             *pi_int = p_sys->stored_attachments.size();
 304             *ppp_attach = (input_attachment_t**)malloc( sizeof(input_attachment_t**) *
 305                                                         p_sys->stored_attachments.size() );
 306             if( !(*ppp_attach) )
 307                 return VLC_ENOMEM;
 308             for( size_t i = 0; i < p_sys->stored_attachments.size(); i++ )
 309             {
 310                 attachment_c *a = p_sys->stored_attachments[i];
 311                 (*ppp_attach)[i] = vlc_input_attachment_New( a->fileName(), a->mimeType(), NULL,
 312                                                              a->p_data, a->size() );
 313             }
 314             return VLC_SUCCESS;
 315
 316         case DEMUX_GET_META:
 317             p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
 318             vlc_meta_Merge( p_meta, p_sys->meta );
 319             return VLC_SUCCESS;
 320
 321         case DEMUX_GET_LENGTH:
 322             pi64 = (int64_t*)va_arg( args, int64_t * );
 323             if( p_sys->f_duration > 0.0 )
 324             {
 325                 *pi64 = (int64_t)(p_sys->f_duration * 1000);
 326                 return VLC_SUCCESS;
 327             }
 328             return VLC_EGENERIC;
 329
 330         case DEMUX_GET_POSITION:
 331             pf = (double*)va_arg( args, double * );
 332             if ( p_sys->f_duration > 0.0 )
 333                 *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);
 334             return VLC_SUCCESS;
 335
 336         case DEMUX_SET_POSITION:
 337             if( p_sys->f_duration > 0.0 )
 338             {
 339                 f = (double)va_arg( args, double );
 340                 Seek( p_demux, -1, f, NULL );
 341                 return VLC_SUCCESS;
 342             }
 343             return VLC_EGENERIC;
 344
 345         case DEMUX_GET_TIME:
 346             pi64 = (int64_t*)va_arg( args, int64_t * );
 347             *pi64 = p_sys->i_pts;
 348             return VLC_SUCCESS;
 349
 350         case DEMUX_GET_TITLE_INFO:
 351             if( p_sys->titles.size() > 1 || ( p_sys->titles.size() == 1 && p_sys->titles[0]->i_seekpoint > 0 ) )
 352             {
 353                 input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 354                 int *pi_int    = (int*)va_arg( args, int* );
 355
 356                 *pi_int = p_sys->titles.size();
 357                 *ppp_title = (input_title_t**)malloc( sizeof( input_title_t**) * p_sys->titles.size() );
 358
 359                 for( size_t i = 0; i < p_sys->titles.size(); i++ )
 360                     (*ppp_title)[i] = vlc_input_title_Duplicate( p_sys->titles[i] );
 361                 return VLC_SUCCESS;
 362             }
 363             return VLC_EGENERIC;
 364
 365         case DEMUX_SET_TITLE:
 366             /* handle editions as titles */
 367             i_idx = (int)va_arg( args, int );
 368             if(i_idx <  p_sys->titles.size() && p_sys->titles[i_idx]->i_seekpoint)
 369             {
 370                 p_sys->p_current_segment->i_current_edition = i_idx;
 371                 p_sys->i_current_title = i_idx;
 372                 p_sys->p_current_segment->p_current_chapter = p_sys->p_current_segment->editions[p_sys->p_current_segment->i_current_edition]->getChapterbyTimecode(0);
 373
 374                 Seek( p_demux, (int64_t)p_sys->titles[i_idx]->seekpoint[0]->i_time_offset, -1, NULL);
 375                 p_demux->info.i_seekpoint |= INPUT_UPDATE_SEEKPOINT;
 376                 p_demux->info.i_seekpoint = 0;
 377                 p_sys->f_duration = (float) p_sys->titles[i_idx]->i_length / 1000.f;
 378                 return VLC_SUCCESS;
 379             }
 380             return VLC_EGENERIC;
 381
 382         case DEMUX_SET_SEEKPOINT:
 383             i_skp = (int)va_arg( args, int );
 384
 385             // TODO change the way it works with the << & >> buttons on the UI (+1/-1 instead of a number)
 386             if( p_sys->titles.size() && i_skp < p_sys->titles[p_sys->i_current_title]->i_seekpoint)
 387             {
 388                 Seek( p_demux, (int64_t)p_sys->titles[p_sys->i_current_title]->seekpoint[i_skp]->i_time_offset, -1, NULL);
 389                 p_demux->info.i_seekpoint |= INPUT_UPDATE_SEEKPOINT;
 390                 p_demux->info.i_seekpoint = i_skp;
 391                 return VLC_SUCCESS;
 392             }
 393             return VLC_EGENERIC;
 394
 395         case DEMUX_GET_FPS:
 396             pf = (double *)va_arg( args, double * );
 397             *pf = 0.0;
 398             if( p_sys->p_current_segment && p_sys->p_current_segment->CurrentSegment() )
 399             {
 400                 const matroska_segment_c *p_segment = p_sys->p_current_segment->CurrentSegment();
 401                 for( size_t i = 0; i < p_segment->tracks.size(); i++ )
 402                 {
 403                     mkv_track_t *tk = p_segment->tracks[i];
 404                     if( tk->fmt.i_cat == VIDEO_ES && tk->fmt.video.i_frame_rate_base > 0 )
 405                     {
 406                         *pf = (double)tk->fmt.video.i_frame_rate / tk->fmt.video.i_frame_rate_base;
 407                         break;
 408                     }
 409                 }
 410             }
 411             return VLC_SUCCESS;
 412
 413         case DEMUX_SET_TIME:
 414             i64 = (int64_t) va_arg( args, int64_t );
 415             msg_Dbg(p_demux,"SET_TIME to %"PRId64, i64 );
 416             Seek( p_demux, i64, -1, NULL );
 417             return VLC_SUCCESS;
 418         default:
 419             return VLC_EGENERIC;
 420     }
 421 }
 422
 423 /* Seek */
 424 static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, virtual_chapter_c *p_chapter )
 425 {
 426     demux_sys_t        *p_sys = p_demux->p_sys;
 427     virtual_segment_c  *p_vsegment = p_sys->p_current_segment;
 428     matroska_segment_c *p_segment = p_vsegment->CurrentSegment();
 429     mtime_t            i_time_offset = 0;
 430     int64_t            i_global_position = -1;
 431
 432     int         i_index;
 433
 434     msg_Dbg( p_demux, "seek request to %"PRId64" (%f%%)", i_date, f_percent );
 435     if( i_date < 0 && f_percent < 0 )
 436     {
 437         msg_Warn( p_demux, "cannot seek nowhere!" );
 438         return;
 439     }
 440     if( f_percent > 1.0 )
 441     {
 442         msg_Warn( p_demux, "cannot seek so far!" );
 443         return;
 444     }
 445     if( p_sys->f_duration < 0 )
 446     {
 447         msg_Warn( p_demux, "cannot seek without duration!");
 448         return;
 449     }
 450
 451     /* seek without index or without date */
 452     if( f_percent >= 0 && (var_InheritBool( p_demux, "mkv-seek-percent" ) || !p_segment->b_cues || i_date < 0 ))
 453     {
 454         i_date = int64_t( f_percent * p_sys->f_duration * 1000.0 );
 455         if( !p_segment->b_cues )
 456         {
 457             int64_t i_pos = int64_t( f_percent * stream_Size( p_demux->s ) );
 458
 459             msg_Dbg( p_demux, "lengthy way of seeking for pos:%"PRId64, i_pos );
 460             for( i_index = 0; i_index < p_segment->i_index; i_index++ )
 461             {
 462                 if( p_segment->p_indexes[i_index].i_position >= i_pos &&
 463                     p_segment->p_indexes[i_index].i_time > 0 )
 464                     break;
 465             }
 466             if( i_index == p_segment->i_index )
 467                 i_index--;
 468
 469             if( p_segment->p_indexes[i_index].i_position < i_pos )
 470             {
 471                 msg_Dbg( p_demux, "no cues, seek request to global pos: %"PRId64, i_pos );
 472                 i_global_position = i_pos;
 473             }
 474         }
 475     }
 476     p_vsegment->Seek( *p_demux, i_date, i_time_offset, p_chapter, i_global_position );
 477 }
 478
 479 /* Needed by matroska_segment::Seek() and Seek */
 480 void BlockDecode( demux_t *p_demux, KaxBlock *block, KaxSimpleBlock *simpleblock,
 481                          mtime_t i_pts, mtime_t i_duration, bool f_mandatory )
 482 {
 483     demux_sys_t        *p_sys = p_demux->p_sys;
 484     matroska_segment_c *p_segment = p_sys->p_current_segment->CurrentSegment();
 485
 486     if( !p_segment ) return;
 487
 488     size_t          i_track;
 489     if( p_segment->BlockFindTrackIndex( &i_track, block, simpleblock ) )
 490     {
 491         msg_Err( p_demux, "invalid track number" );
 492         return;
 493     }
 494
 495     mkv_track_t *tk = p_segment->tracks[i_track];
 496
 497     if( tk->fmt.i_cat != NAV_ES && tk->p_es == NULL )
 498     {
 499         msg_Err( p_demux, "unknown track number" );
 500         return;
 501     }
 502     if( i_pts + i_duration < p_sys->i_start_pts && tk->fmt.i_cat == AUDIO_ES )
 503     {
 504         return; /* discard audio packets that shouldn't be rendered */
 505     }
 506
 507     if ( tk->fmt.i_cat != NAV_ES )
 508     {
 509         bool b;
 510         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
 511
 512         if( !b )
 513         {
 514             tk->b_inited = false;
 515             if( tk->fmt.i_cat == VIDEO_ES || tk->fmt.i_cat == AUDIO_ES )
 516                 tk->i_last_dts = i_pts;
 517             return;
 518         }
 519     }
 520
 521
 522     /* First send init data */
 523     if( !tk->b_inited && tk->i_data_init > 0 )
 524     {
 525         block_t *p_init;
 526
 527         msg_Dbg( p_demux, "sending header (%d bytes)", tk->i_data_init );
 528         p_init = MemToBlock( tk->p_data_init, tk->i_data_init, 0 );
 529         if( p_init ) es_out_Send( p_demux->out, tk->p_es, p_init );
 530     }
 531     tk->b_inited = true;
 532
 533
 534     size_t frame_size = 0;
 535     size_t block_size = 0;
 536
 537     if( simpleblock != NULL )
 538         block_size = simpleblock->GetSize();
 539     else
 540         block_size = block->GetSize();
 541
 542     for( unsigned int i = 0;
 543          ( block != NULL && i < block->NumberFrames()) || ( simpleblock != NULL && i < simpleblock->NumberFrames() );
 544          i++ )
 545     {
 546         block_t *p_block;
 547         DataBuffer *data;
 548         if( simpleblock != NULL )
 549         {
 550             data = &simpleblock->GetBuffer(i);
 551             // condition when the DTS is correct (keyframe or B frame == NOT P frame)
 552             f_mandatory = simpleblock->IsDiscardable() || simpleblock->IsKeyframe();
 553         }
 554         else
 555         {
 556             data = &block->GetBuffer(i);
 557             // condition when the DTS is correct (keyframe or B frame == NOT P frame)
 558         }
 559         frame_size += data->Size();
 560         if( !data->Buffer() || data->Size() > SIZE_MAX || frame_size > block_size  )
 561         {
 562             msg_Warn( p_demux, "Cannot read frame (too long or no frame)" );
 563             break;
 564         }
 565
 566         if( tk->i_compression_type == MATROSKA_COMPRESSION_HEADER &&
 567             tk->p_compression_data != NULL &&
 568             tk->i_encoding_scope & MATROSKA_ENCODING_SCOPE_ALL_FRAMES )
 569             p_block = MemToBlock( data->Buffer(), data->Size(), tk->p_compression_data->GetSize() );
 570         else
 571             p_block = MemToBlock( data->Buffer(), data->Size(), 0 );
 572
 573         if( p_block == NULL )
 574         {
 575             break;
 576         }
 577
 578 #if defined(HAVE_ZLIB_H)
 579         if( tk->i_compression_type == MATROSKA_COMPRESSION_ZLIB &&
 580             tk->i_encoding_scope & MATROSKA_ENCODING_SCOPE_ALL_FRAMES )
 581         {
 582             p_block = block_zlib_decompress( VLC_OBJECT(p_demux), p_block );
 583             if( p_block == NULL )
 584                 break;
 585         }
 586         else
 587 #endif
 588         if( tk->i_compression_type == MATROSKA_COMPRESSION_HEADER &&
 589             tk->i_encoding_scope & MATROSKA_ENCODING_SCOPE_ALL_FRAMES )
 590         {
 591             memcpy( p_block->p_buffer, tk->p_compression_data->GetBuffer(), tk->p_compression_data->GetSize() );
 592         }
 593
 594         if( tk->fmt.i_codec == VLC_CODEC_COOK ||
 595             tk->fmt.i_codec == VLC_CODEC_ATRAC3 )
 596         {
 597             handle_real_audio(p_demux, tk, p_block, i_pts);
 598             block_Release(p_block);
 599             i_pts = ( tk->i_default_duration )?
 600                 i_pts + ( mtime_t )( tk->i_default_duration / 1000 ):
 601                 VLC_TS_INVALID;
 602             continue;
 603         }
 604
 605         if ( tk->fmt.i_cat == NAV_ES )
 606         {
 607             // TODO handle the start/stop times of this packet
 608             p_sys->p_ev->SetPci( (const pci_t *)&p_block->p_buffer[1]);
 609             block_Release( p_block );
 610             return;
 611         }
 612         // correct timestamping when B frames are used
 613         if( tk->fmt.i_cat != VIDEO_ES )
 614         {
 615             p_block->i_dts = p_block->i_pts = i_pts;
 616         }
 617         else
 618         {
 619             if( tk->b_dts_only )
 620             {
 621                 p_block->i_pts = VLC_TS_INVALID;
 622                 p_block->i_dts = i_pts;
 623             }
 624             else if( tk->b_pts_only )
 625             {
 626                 p_block->i_pts = i_pts;
 627                 p_block->i_dts = i_pts;
 628             }
 629             else
 630             {
 631                 p_block->i_pts = i_pts;
 632                 if ( f_mandatory )
 633                     p_block->i_dts = p_block->i_pts;
 634                 else
 635                     p_block->i_dts = min( i_pts, tk->i_last_dts + ( mtime_t )( tk->i_default_duration / 1000 ) );
 636             }
 637         }
 638         if( tk->fmt.i_cat == VIDEO_ES || tk->fmt.i_cat == AUDIO_ES )
 639             tk->i_last_dts = p_block->i_dts;
 640
 641 #if 0
 642 msg_Dbg( p_demux, "block i_dts: %"PRId64" / i_pts: %"PRId64, p_block->i_dts, p_block->i_pts);
 643 #endif
 644         if( strcmp( tk->psz_codec, "S_VOBSUB" ) )
 645         {
 646             p_block->i_length = i_duration * tk-> f_timecodescale * (double) p_segment->i_timescale / 1000.0;
 647         }
 648
 649         /* FIXME remove when VLC_TS_INVALID work is done */
 650         if( i == 0 || p_block->i_dts > VLC_TS_INVALID )
 651             p_block->i_dts += VLC_TS_0;
 652         if( !tk->b_dts_only && ( i == 0 || p_block->i_pts > VLC_TS_INVALID ) )
 653             p_block->i_pts += VLC_TS_0;
 654
 655         es_out_Send( p_demux->out, tk->p_es, p_block );
 656
 657         /* use time stamp only for first block */
 658         i_pts = ( tk->i_default_duration )?
 659                  i_pts + ( mtime_t )( tk->i_default_duration / 1000 ):
 660                  VLC_TS_INVALID;
 661     }
 662 }
 663
 664 /*****************************************************************************
 665  * Demux: reads and demuxes data packets
 666  *****************************************************************************
 667  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 668  *****************************************************************************/
 669 static int Demux( demux_t *p_demux)
 670 {
 671     demux_sys_t        *p_sys = p_demux->p_sys;
 672
 673     vlc_mutex_lock( &p_sys->lock_demuxer );
 674
 675     virtual_segment_c  *p_vsegment = p_sys->p_current_segment;
 676     matroska_segment_c *p_segment = p_vsegment->CurrentSegment();
 677     if ( p_segment == NULL ) return 0;
 678     int                i_block_count = 0;
 679     int                i_return = 0;
 680
 681     for( ;; )
 682     {
 683         if( p_sys->i_pts >= p_sys->i_start_pts  )
 684             if ( p_vsegment->UpdateCurrentToChapter( *p_demux ) )
 685             {
 686                 i_return = 1;
 687                 break;
 688             }
 689
 690         if ( p_vsegment->CurrentEdition() &&
 691              p_vsegment->CurrentEdition()->b_ordered &&
 692              p_vsegment->CurrentChapter() == NULL )
 693             /* nothing left to read in this ordered edition */
 694             break;
 695
 696         KaxBlock *block;
 697         KaxSimpleBlock *simpleblock;
 698         int64_t i_block_duration = 0;
 699         bool b_key_picture;
 700         bool b_discardable_picture;
 701         if( p_segment->BlockGet( block, simpleblock, &b_key_picture, &b_discardable_picture, &i_block_duration ) )
 702         {
 703             if ( p_vsegment->CurrentEdition() && p_vsegment->CurrentEdition()->b_ordered )
 704             {
 705                 const virtual_chapter_c *p_chap = p_vsegment->CurrentChapter();
 706                 // check if there are more chapters to read
 707                 if ( p_chap != NULL )
 708                 {
 709                     /* TODO handle successive chapters with the same user_start_time/user_end_time
 710                     */
 711                     p_sys->i_pts = p_chap->i_virtual_stop_time;
 712                     p_sys->i_pts++; // trick to avoid staying on segments with no duration and no content
 713
 714                     i_return = 1;
 715                 }
 716
 717                 break;
 718             }
 719             else
 720             {
 721                 msg_Warn( p_demux, "cannot get block EOF?" );
 722                 break;
 723             }
 724         }
 725
 726         if( simpleblock != NULL )
 727             p_sys->i_pts = p_sys->i_chapter_time + ( (mtime_t)simpleblock->GlobalTimecode() / INT64_C(1000) );
 728         else
 729             p_sys->i_pts = p_sys->i_chapter_time + ( (mtime_t)block->GlobalTimecode() / INT64_C(1000) );
 730
 731         mtime_t i_pcr = VLC_TS_INVALID;
 732         for( size_t i = 0; i < p_segment->tracks.size(); i++)
 733             if( p_segment->tracks[i]->i_last_dts > VLC_TS_INVALID &&
 734                 ( p_segment->tracks[i]->i_last_dts < i_pcr || i_pcr == VLC_TS_INVALID ))
 735                 i_pcr = p_segment->tracks[i]->i_last_dts;
 736
 737         if( i_pcr > p_sys->i_pcr + 300000 )
 738         {
 739             es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + p_sys->i_pcr );
 740             p_sys->i_pcr = i_pcr;
 741         }
 742
 743         if( p_sys->i_pts >= p_sys->i_start_pts  )
 744         {
 745             if ( p_vsegment->UpdateCurrentToChapter( *p_demux ) )
 746             {
 747                 i_return = 1;
 748                 delete block;
 749                 break;
 750             }
 751         }
 752
 753         if ( p_vsegment->CurrentEdition() &&
 754              p_vsegment->CurrentEdition()->b_ordered &&
 755              p_vsegment->CurrentChapter() == NULL )
 756         {
 757             /* nothing left to read in this ordered edition */
 758             delete block;
 759             break;
 760         }
 761
 762         BlockDecode( p_demux, block, simpleblock, p_sys->i_pts, i_block_duration, b_key_picture || b_discardable_picture );
 763
 764         delete block;
 765         i_block_count++;
 766
 767         // TODO optimize when there is need to leave or when seeking has been called
 768         if( i_block_count > 5 )
 769         {
 770             i_return = 1;
 771             break;
 772         }
 773     }
 774
 775     vlc_mutex_unlock( &p_sys->lock_demuxer );
 776
 777     return i_return;
 778 }
 779