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

   1 /*****************************************************************************
   2  * mkv.cpp : matroska demuxer
   3  *****************************************************************************
   4  * Copyright (C) 2003-2004 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 /*****************************************************************************
  37  * Module descriptor
  38  *****************************************************************************/
  39 static int  Open ( vlc_object_t * );
  40 static void Close( vlc_object_t * );
  41
  42 vlc_module_begin();
  43     set_shortname( "Matroska" );
  44     set_description( N_("Matroska stream demuxer" ) );
  45     set_capability( "demux", 0 );
  46     set_callbacks( Open, Close );
  47     set_category( CAT_INPUT );
  48     set_subcategory( SUBCAT_INPUT_DEMUX );
  49
  50     add_bool( "mkv-use-ordered-chapters", 1, NULL,
  51             N_("Ordered chapters"),
  52             N_("Play ordered chapters as specified in the segment."), true );
  53
  54     add_bool( "mkv-use-chapter-codec", 1, NULL,
  55             N_("Chapter codecs"),
  56             N_("Use chapter codecs found in the segment."), true );
  57
  58     add_bool( "mkv-preload-local-dir", 1, NULL,
  59             N_("Preload Directory"),
  60             N_("Preload matroska files from the same family in the same directory (not good for broken files)."), true );
  61
  62     add_bool( "mkv-seek-percent", 0, NULL,
  63             N_("Seek based on percent not time"),
  64             N_("Seek based on percent not time."), true );
  65
  66     add_bool( "mkv-use-dummy", 0, NULL,
  67             N_("Dummy Elements"),
  68             N_("Read and discard unknown EBML elements (not good for broken files)."), true );
  69
  70     add_shortcut( "mka" );
  71     add_shortcut( "mkv" );
  72 vlc_module_end();
  73
  74 class demux_sys_t;
  75
  76 static int  Demux  ( demux_t * );
  77 static int  Control( demux_t *, int, va_list );
  78 static void Seek   ( demux_t *, mtime_t i_date, double f_percent, chapter_item_c *psz_chapter );
  79
  80 /*****************************************************************************
  81  * Open: initializes matroska demux structures
  82  *****************************************************************************/
  83 static int Open( vlc_object_t * p_this )
  84 {
  85     demux_t            *p_demux = (demux_t*)p_this;
  86     demux_sys_t        *p_sys;
  87     matroska_stream_c  *p_stream;
  88     matroska_segment_c *p_segment;
  89     const uint8_t      *p_peek;
  90     std::string         s_path, s_filename;
  91     vlc_stream_io_callback *p_io_callback;
  92     EbmlStream         *p_io_stream;
  93
  94     /* peek the begining */
  95     if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
  96
  97     /* is a valid file */
  98     if( p_peek[0] != 0x1a || p_peek[1] != 0x45 ||
  99         p_peek[2] != 0xdf || p_peek[3] != 0xa3 ) return VLC_EGENERIC;
 100
 101     /* Set the demux function */
 102     p_demux->pf_demux   = Demux;
 103     p_demux->pf_control = Control;
 104     p_demux->p_sys      = p_sys = new demux_sys_t( *p_demux );
 105
 106     p_io_callback = new vlc_stream_io_callback( p_demux->s, false );
 107     p_io_stream = new EbmlStream( *p_io_callback );
 108
 109     if( p_io_stream == NULL )
 110     {
 111         msg_Err( p_demux, "failed to create EbmlStream" );
 112         delete p_io_callback;
 113         delete p_sys;
 114         return VLC_EGENERIC;
 115     }
 116
 117     p_stream = p_sys->AnalyseAllSegmentsFound( p_demux, p_io_stream, true );
 118     if( p_stream == NULL )
 119     {
 120         msg_Err( p_demux, "cannot find KaxSegment" );
 121         goto error;
 122     }
 123     p_sys->streams.push_back( p_stream );
 124
 125     p_stream->p_in = p_io_callback;
 126     p_stream->p_es = p_io_stream;
 127
 128     for (size_t i=0; i<p_stream->segments.size(); i++)
 129     {
 130         p_stream->segments[i]->Preload();
 131     }
 132
 133     p_segment = p_stream->segments[0];
 134     if( p_segment->cluster == NULL )
 135     {
 136         msg_Err( p_demux, "cannot find any cluster, damaged file ?" );
 137         goto error;
 138     }
 139
 140     if (config_GetInt( p_demux, "mkv-preload-local-dir" ))
 141     {
 142         /* get the files from the same dir from the same family (based on p_demux->psz_path) */
 143         if (p_demux->psz_path[0] != '\0' && !strcmp(p_demux->psz_access, ""))
 144         {
 145             // assume it's a regular file
 146             // get the directory path
 147             s_path = p_demux->psz_path;
 148             if (s_path.at(s_path.length() - 1) == DIRECTORY_SEPARATOR)
 149             {
 150                 s_path = s_path.substr(0,s_path.length()-1);
 151             }
 152             else
 153             {
 154                 if (s_path.find_last_of(DIRECTORY_SEPARATOR) > 0)
 155                 {
 156                     s_path = s_path.substr(0,s_path.find_last_of(DIRECTORY_SEPARATOR));
 157                 }
 158             }
 159
 160             DIR *p_src_dir = utf8_opendir(s_path.c_str());
 161
 162             if (p_src_dir != NULL)
 163             {
 164                 char *psz_file;
 165                 while ((psz_file = utf8_readdir(p_src_dir)) != NULL)
 166                 {
 167                     if (strlen(psz_file) > 4)
 168                     {
 169                         s_filename = s_path + DIRECTORY_SEPARATOR + psz_file;
 170
 171 #ifdef WIN32
 172                         if (!strcasecmp(s_filename.c_str(), p_demux->psz_path))
 173 #else
 174                         if (!s_filename.compare(p_demux->psz_path))
 175 #endif
 176                         {
 177                             free (psz_file);
 178                             continue; // don't reuse the original opened file
 179                         }
 180
 181 #if defined(__GNUC__) && (__GNUC__ < 3)
 182                         if (!s_filename.compare("mkv", s_filename.length() - 3, 3) ||
 183                             !s_filename.compare("mka", s_filename.length() - 3, 3))
 184 #else
 185                         if (!s_filename.compare(s_filename.length() - 3, 3, "mkv") ||
 186                             !s_filename.compare(s_filename.length() - 3, 3, "mka"))
 187 #endif
 188                         {
 189                             // test wether this file belongs to our family
 190                             const uint8_t *p_peek;
 191                             bool          file_ok = false;
 192                             stream_t      *p_file_stream = stream_UrlNew(
 193                                                             p_demux,
 194                                                             s_filename.c_str());
 195                             /* peek the begining */
 196                             if( p_file_stream &&
 197                                 stream_Peek( p_file_stream, &p_peek, 4 ) >= 4
 198                                 && p_peek[0] == 0x1a && p_peek[1] == 0x45 &&
 199                                 p_peek[2] == 0xdf && p_peek[3] == 0xa3 ) file_ok = true;
 200
 201                             if ( file_ok )
 202                             {
 203                                 vlc_stream_io_callback *p_file_io = new vlc_stream_io_callback( p_file_stream, true );
 204                                 EbmlStream *p_estream = new EbmlStream(*p_file_io);
 205
 206                                 p_stream = p_sys->AnalyseAllSegmentsFound( p_demux, p_estream );
 207
 208                                 if ( p_stream == NULL )
 209                                 {
 210                                     msg_Dbg( p_demux, "the file '%s' will not be used", s_filename.c_str() );
 211                                     delete p_estream;
 212                                     delete p_file_io;
 213                                 }
 214                                 else
 215                                 {
 216                                     p_stream->p_in = p_file_io;
 217                                     p_stream->p_es = p_estream;
 218                                     p_sys->streams.push_back( p_stream );
 219                                 }
 220                             }
 221                             else
 222                             {
 223                                 if( p_file_stream ) {
 224                                     stream_Delete( p_file_stream );
 225                                 }
 226                                 msg_Dbg( p_demux, "the file '%s' cannot be opened", s_filename.c_str() );
 227                             }
 228                         }
 229                     }
 230                     free (psz_file);
 231                 }
 232                 closedir( p_src_dir );
 233             }
 234         }
 235
 236         p_sys->PreloadFamily( *p_segment );
 237     }
 238
 239     p_sys->PreloadLinked( p_segment );
 240
 241     if ( !p_sys->PreparePlayback( NULL ) )
 242     {
 243         msg_Err( p_demux, "cannot use the segment" );
 244         goto error;
 245     }
 246
 247     p_sys->StartUiThread();
 248
 249     return VLC_SUCCESS;
 250
 251 error:
 252     delete p_sys;
 253     return VLC_EGENERIC;
 254 }
 255
 256 /*****************************************************************************
 257  * Close: frees unused data
 258  *****************************************************************************/
 259 static void Close( vlc_object_t *p_this )
 260 {
 261     demux_t     *p_demux = (demux_t*)p_this;
 262     demux_sys_t *p_sys   = p_demux->p_sys;
 263
 264     delete p_sys;
 265 }
 266
 267 /*****************************************************************************
 268  * Control:
 269  *****************************************************************************/
 270 static int Control( demux_t *p_demux, int i_query, va_list args )
 271 {
 272     demux_sys_t        *p_sys = p_demux->p_sys;
 273     int64_t     *pi64;
 274     double      *pf, f;
 275     int         i_skp;
 276     size_t      i_idx;
 277
 278     vlc_meta_t *p_meta;
 279     input_attachment_t ***ppp_attach;
 280     int *pi_int;
 281     int i;
 282
 283     switch( i_query )
 284     {
 285         case DEMUX_GET_ATTACHMENTS:
 286             ppp_attach = (input_attachment_t***)va_arg( args, input_attachment_t*** );
 287             pi_int = (int*)va_arg( args, int * );
 288
 289             if( p_sys->stored_attachments.size() <= 0 )
 290                 return VLC_EGENERIC;
 291
 292             *pi_int = p_sys->stored_attachments.size();
 293             *ppp_attach = (input_attachment_t**)malloc( sizeof(input_attachment_t**) *
 294                                                         p_sys->stored_attachments.size() );
 295             if( !(*ppp_attach) )
 296                 return VLC_ENOMEM;
 297             for( i = 0; i < p_sys->stored_attachments.size(); i++ )
 298             {
 299                 attachment_c *a = p_sys->stored_attachments[i];
 300                 (*ppp_attach)[i] = vlc_input_attachment_New( a->psz_file_name.c_str(), a->psz_mime_type.c_str(), NULL,
 301                                                              a->p_data, a->i_size );
 302             }
 303             return VLC_SUCCESS;
 304
 305         case DEMUX_GET_META:
 306             p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
 307             vlc_meta_Merge( p_meta, p_sys->meta );
 308             return VLC_SUCCESS;
 309
 310         case DEMUX_GET_LENGTH:
 311             pi64 = (int64_t*)va_arg( args, int64_t * );
 312             if( p_sys->f_duration > 0.0 )
 313             {
 314                 *pi64 = (int64_t)(p_sys->f_duration * 1000);
 315                 return VLC_SUCCESS;
 316             }
 317             return VLC_EGENERIC;
 318
 319         case DEMUX_GET_POSITION:
 320             pf = (double*)va_arg( args, double * );
 321             if ( p_sys->f_duration > 0.0 )
 322                 *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);
 323             return VLC_SUCCESS;
 324
 325         case DEMUX_SET_POSITION:
 326             f = (double)va_arg( args, double );
 327             Seek( p_demux, -1, f, NULL );
 328             return VLC_SUCCESS;
 329
 330         case DEMUX_GET_TIME:
 331             pi64 = (int64_t*)va_arg( args, int64_t * );
 332             *pi64 = p_sys->i_pts;
 333             return VLC_SUCCESS;
 334
 335         case DEMUX_GET_TITLE_INFO:
 336             if( p_sys->titles.size() > 1 || ( p_sys->titles.size() == 1 && p_sys->titles[0]->i_seekpoint > 0 ) )
 337             {
 338                 input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 339                 int *pi_int    = (int*)va_arg( args, int* );
 340
 341                 *pi_int = p_sys->titles.size();
 342                 *ppp_title = (input_title_t**)malloc( sizeof( input_title_t**) * p_sys->titles.size() );
 343
 344                 for( size_t i = 0; i < p_sys->titles.size(); i++ )
 345                 {
 346                     (*ppp_title)[i] = vlc_input_title_Duplicate( p_sys->titles[i] );
 347                 }
 348                 return VLC_SUCCESS;
 349             }
 350             return VLC_EGENERIC;
 351
 352         case DEMUX_SET_TITLE:
 353             /* TODO handle editions as titles */
 354             i_idx = (int)va_arg( args, int );
 355             if( i_idx < p_sys->used_segments.size() )
 356             {
 357                 p_sys->JumpTo( *p_sys->used_segments[i_idx], NULL );
 358                 return VLC_SUCCESS;
 359             }
 360             return VLC_EGENERIC;
 361
 362         case DEMUX_SET_SEEKPOINT:
 363             i_skp = (int)va_arg( args, int );
 364
 365             // TODO change the way it works with the << & >> buttons on the UI (+1/-1 instead of a number)
 366             if( p_sys->titles.size() && i_skp < p_sys->titles[p_sys->i_current_title]->i_seekpoint)
 367             {
 368                 Seek( p_demux, (int64_t)p_sys->titles[p_sys->i_current_title]->seekpoint[i_skp]->i_time_offset, -1, NULL);
 369                 p_demux->info.i_seekpoint |= INPUT_UPDATE_SEEKPOINT;
 370                 p_demux->info.i_seekpoint = i_skp;
 371                 return VLC_SUCCESS;
 372             }
 373             return VLC_EGENERIC;
 374
 375         case DEMUX_GET_FPS:
 376             pf = (double *)va_arg( args, double * );
 377             *pf = 0.0;
 378             if( p_sys->p_current_segment && p_sys->p_current_segment->Segment() )
 379             {
 380                 const matroska_segment_c *p_segment = p_sys->p_current_segment->Segment();
 381                 for( size_t i = 0; i < p_segment->tracks.size(); i++ )
 382                 {
 383                     mkv_track_t *tk = p_segment->tracks[i];
 384                     if( tk->fmt.i_cat == VIDEO_ES && tk->fmt.video.i_frame_rate_base > 0 )
 385                     {
 386                         *pf = (double)tk->fmt.video.i_frame_rate / tk->fmt.video.i_frame_rate_base;
 387                         break;
 388                     }
 389                 }
 390             }
 391             return VLC_SUCCESS;
 392
 393         case DEMUX_SET_TIME:
 394         default:
 395             return VLC_EGENERIC;
 396     }
 397 }
 398
 399 /* Seek */
 400 static void Seek( demux_t *p_demux, mtime_t i_date, double f_percent, chapter_item_c *psz_chapter )
 401 {
 402     demux_sys_t        *p_sys = p_demux->p_sys;
 403     virtual_segment_c  *p_vsegment = p_sys->p_current_segment;
 404     matroska_segment_c *p_segment = p_vsegment->Segment();
 405     mtime_t            i_time_offset = 0;
 406     int64_t            i_global_position = -1;
 407
 408     int         i_index;
 409
 410     msg_Dbg( p_demux, "seek request to %"PRId64" (%f%%)", i_date, f_percent );
 411     if( i_date < 0 && f_percent < 0 )
 412     {
 413         msg_Warn( p_demux, "cannot seek nowhere !" );
 414         return;
 415     }
 416     if( f_percent > 1.0 )
 417     {
 418         msg_Warn( p_demux, "cannot seek so far !" );
 419         return;
 420     }
 421
 422     /* seek without index or without date */
 423     if( f_percent >= 0 && (config_GetInt( p_demux, "mkv-seek-percent" ) || !p_segment->b_cues || i_date < 0 ))
 424     {
 425         if( p_sys->f_duration >= 0 && p_segment->b_cues )
 426         {
 427             i_date = int64_t( f_percent * p_sys->f_duration * 1000.0 );
 428         }
 429         else
 430         {
 431             int64_t i_pos = int64_t( f_percent * stream_Size( p_demux->s ) );
 432
 433             msg_Dbg( p_demux, "inaccurate way of seeking for pos:%"PRId64, i_pos );
 434             for( i_index = 0; i_index < p_segment->i_index; i_index++ )
 435             {
 436                 if( p_segment->b_cues && p_segment->p_indexes[i_index].i_position < i_pos )
 437                     break;
 438                 if( !p_segment->b_cues && p_segment->p_indexes[i_index].i_position >= i_pos && p_segment->p_indexes[i_index].i_time > 0 )
 439                     break;
 440             }
 441             if( i_index == p_segment->i_index )
 442             {
 443                 i_index--;
 444             }
 445
 446             i_date = p_segment->p_indexes[i_index].i_time;
 447
 448             if( !p_segment->b_cues && ( p_segment->p_indexes[i_index].i_position < i_pos || p_segment->p_indexes[i_index].i_position - i_pos > 2000000 ))
 449             {
 450                 msg_Dbg( p_demux, "no cues, seek request to global pos: %"PRId64, i_pos );
 451                 i_global_position = i_pos;
 452             }
 453         }
 454     }
 455
 456     p_vsegment->Seek( *p_demux, i_date, i_time_offset, psz_chapter, i_global_position );
 457 }
 458
 459 /* Utility function for BlockDecode */
 460 static block_t *MemToBlock( demux_t *p_demux, uint8_t *p_mem, int i_mem, size_t offset)
 461 {
 462     block_t *p_block;
 463     if( !(p_block = block_New( p_demux, i_mem + offset ) ) ) return NULL;
 464     memcpy( p_block->p_buffer + offset, p_mem, i_mem );
 465     //p_block->i_rate = p_input->stream.control.i_rate;
 466     return p_block;
 467 }
 468
 469 /* Needed by matroska_segment::Seek() */
 470 static void BlockDecode( demux_t *p_demux, KaxBlock *block, KaxSimpleBlock *simpleblock,
 471                          mtime_t i_pts, mtime_t i_duration, bool f_mandatory )
 472 {
 473     demux_sys_t        *p_sys = p_demux->p_sys;
 474     matroska_segment_c *p_segment = p_sys->p_current_segment->Segment();
 475
 476     size_t          i_track;
 477     unsigned int    i;
 478     bool            b;
 479
 480     if( p_segment->BlockFindTrackIndex( &i_track, block, simpleblock ) )
 481     {
 482         msg_Err( p_demux, "invalid track number" );
 483         return;
 484     }
 485
 486     mkv_track_t *tk = p_segment->tracks[i_track];
 487
 488     if( tk->fmt.i_cat != NAV_ES && tk->p_es == NULL )
 489     {
 490         msg_Err( p_demux, "unknown track number" );
 491         return;
 492     }
 493     if( i_pts + i_duration < p_sys->i_start_pts && tk->fmt.i_cat == AUDIO_ES )
 494     {
 495         return; /* discard audio packets that shouldn't be rendered */
 496     }
 497
 498     if ( tk->fmt.i_cat != NAV_ES )
 499     {
 500         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
 501
 502         if( !b )
 503         {
 504             tk->b_inited = false;
 505             return;
 506         }
 507     }
 508
 509
 510     /* First send init data */
 511     if( !tk->b_inited && tk->i_data_init > 0 )
 512     {
 513         block_t *p_init;
 514
 515         msg_Dbg( p_demux, "sending header (%d bytes)", tk->i_data_init );
 516         p_init = MemToBlock( p_demux, tk->p_data_init, tk->i_data_init, 0 );
 517         if( p_init ) es_out_Send( p_demux->out, tk->p_es, p_init );
 518     }
 519     tk->b_inited = true;
 520
 521
 522     for( i = 0;
 523          (block != NULL && i < block->NumberFrames()) || (simpleblock != NULL && i < simpleblock->NumberFrames());
 524          i++ )
 525     {
 526         block_t *p_block;
 527         DataBuffer *data;
 528         if( simpleblock != NULL )
 529         {
 530             data = &simpleblock->GetBuffer(i);
 531             // condition when the DTS is correct (keyframe or B frame == NOT P frame)
 532             f_mandatory = simpleblock->IsDiscardable() || simpleblock->IsKeyframe();
 533         }
 534         else
 535         {
 536             data = &block->GetBuffer(i);
 537         }
 538
 539         if( tk->i_compression_type == MATROSKA_COMPRESSION_HEADER && tk->p_compression_data != NULL )
 540             p_block = MemToBlock( p_demux, data->Buffer(), data->Size(), tk->p_compression_data->GetSize() );
 541         else
 542             p_block = MemToBlock( p_demux, data->Buffer(), data->Size(), 0 );
 543
 544         if( p_block == NULL )
 545         {
 546             break;
 547         }
 548
 549 #if defined(HAVE_ZLIB_H)
 550         if( tk->i_compression_type == MATROSKA_COMPRESSION_ZLIB )
 551         {
 552             p_block = block_zlib_decompress( VLC_OBJECT(p_demux), p_block );
 553         }
 554         else
 555 #endif
 556         if( tk->i_compression_type == MATROSKA_COMPRESSION_HEADER )
 557         {
 558             memcpy( p_block->p_buffer, tk->p_compression_data->GetBuffer(), tk->p_compression_data->GetSize() );
 559         }
 560
 561         if ( tk->fmt.i_cat == NAV_ES )
 562         {
 563             // TODO handle the start/stop times of this packet
 564             if ( p_sys->b_ui_hooked )
 565             {
 566                 vlc_mutex_lock( &p_sys->p_ev->lock );
 567                 memcpy( &p_sys->pci_packet, &p_block->p_buffer[1], sizeof(pci_t) );
 568                 p_sys->SwapButtons();
 569                 p_sys->b_pci_packet_set = true;
 570                 vlc_mutex_unlock( &p_sys->p_ev->lock );
 571                 block_Release( p_block );
 572             }
 573             return;
 574         }
 575         // correct timestamping when B frames are used
 576         if( tk->fmt.i_cat != VIDEO_ES )
 577         {
 578             p_block->i_dts = p_block->i_pts = i_pts;
 579         }
 580         else
 581         {
 582             if( !strcmp( tk->psz_codec, "V_MS/VFW/FOURCC" ) )
 583             {
 584                 // in VFW we have no idea about B frames
 585                 p_block->i_pts = 0;
 586                 p_block->i_dts = i_pts;
 587             }
 588             else
 589             {
 590                 p_block->i_pts = i_pts;
 591                 if ( f_mandatory )
 592                     p_block->i_dts = p_block->i_pts;
 593                 else
 594                     p_block->i_dts = min( i_pts, tk->i_last_dts + (mtime_t)(tk->i_default_duration >> 10));
 595                 p_sys->i_pts = p_block->i_dts;
 596             }
 597         }
 598         tk->i_last_dts = p_block->i_dts;
 599
 600 #if 0
 601 msg_Dbg( p_demux, "block i_dts: %"PRId64" / i_pts: %"PRId64, p_block->i_dts, p_block->i_pts);
 602 #endif
 603         if( strcmp( tk->psz_codec, "S_VOBSUB" ) )
 604         {
 605             p_block->i_length = i_duration * 1000;
 606         }
 607
 608         es_out_Send( p_demux->out, tk->p_es, p_block );
 609
 610         /* use time stamp only for first block */
 611         i_pts = 0;
 612     }
 613 }
 614
 615
 616 void matroska_segment_c::Seek( mtime_t i_date, mtime_t i_time_offset, int64_t i_global_position )
 617 {
 618     KaxBlock    *block;
 619     KaxSimpleBlock *simpleblock;
 620     int         i_track_skipping;
 621     int64_t     i_block_duration;
 622     int64_t     i_block_ref1;
 623     int64_t     i_block_ref2;
 624     size_t      i_track;
 625     int64_t     i_seek_position = i_start_pos;
 626     int64_t     i_seek_time = i_start_time;
 627
 628     if( i_global_position >= 0 )
 629     {
 630         /* Special case for seeking in files with no cues */
 631         EbmlElement *el = NULL;
 632         es.I_O().setFilePointer( i_start_pos, seek_beginning );
 633         delete ep;
 634         ep = new EbmlParser( &es, segment, &sys.demuxer );
 635         cluster = NULL;
 636
 637         while( ( el = ep->Get() ) != NULL )
 638         {
 639             if( MKV_IS_ID( el, KaxCluster ) )
 640             {
 641                 cluster = (KaxCluster *)el;
 642                 i_cluster_pos = cluster->GetElementPosition();
 643                 if( i_index == 0 ||
 644                         ( i_index > 0 && p_indexes[i_index - 1].i_position < (int64_t)cluster->GetElementPosition() ) )
 645                 {
 646                     IndexAppendCluster( cluster );
 647                 }
 648                 if( es.I_O().getFilePointer() >= i_global_position )
 649                 {
 650                     ParseCluster();
 651                     msg_Dbg( &sys.demuxer, "we found a cluster that is in the neighbourhood" );
 652                     return;
 653                 }
 654             }
 655         }
 656         msg_Err( &sys.demuxer, "This file has no cues, and we were unable to seek to the requested position by parsing." );
 657         return;
 658     }
 659
 660     if ( i_index > 0 )
 661     {
 662         int i_idx = 0;
 663
 664         for( ; i_idx < i_index; i_idx++ )
 665         {
 666             if( p_indexes[i_idx].i_time + i_time_offset > i_date )
 667             {
 668                 break;
 669             }
 670         }
 671
 672         if( i_idx > 0 )
 673         {
 674             i_idx--;
 675         }
 676
 677         i_seek_position = p_indexes[i_idx].i_position;
 678         i_seek_time = p_indexes[i_idx].i_time;
 679     }
 680
 681     msg_Dbg( &sys.demuxer, "seek got %"PRId64" (%d%%)",
 682                 i_seek_time, (int)( 100 * i_seek_position / stream_Size( sys.demuxer.s ) ) );
 683
 684     es.I_O().setFilePointer( i_seek_position, seek_beginning );
 685
 686     delete ep;
 687     ep = new EbmlParser( &es, segment, &sys.demuxer );
 688     cluster = NULL;
 689
 690     sys.i_start_pts = i_date;
 691
 692     /* now parse until key frame */
 693     i_track_skipping = 0;
 694     for( i_track = 0; i_track < tracks.size(); i_track++ )
 695     {
 696         if( tracks[i_track]->fmt.i_cat == VIDEO_ES )
 697         {
 698             tracks[i_track]->b_search_keyframe = true;
 699             i_track_skipping++;
 700         }
 701     }
 702     es_out_Control( sys.demuxer.out, ES_OUT_SET_NEXT_DISPLAY_TIME, i_date );
 703
 704     while( i_track_skipping > 0 )
 705     {
 706         if( BlockGet( block, simpleblock, &i_block_ref1, &i_block_ref2, &i_block_duration ) )
 707         {
 708             msg_Warn( &sys.demuxer, "cannot get block EOF?" );
 709
 710             return;
 711         }
 712         ep->Down();
 713
 714         for( i_track = 0; i_track < tracks.size(); i_track++ )
 715         {
 716             if( (simpleblock && tracks[i_track]->i_number == simpleblock->TrackNum()) ||
 717                 (block && tracks[i_track]->i_number == block->TrackNum()) )
 718             {
 719                 break;
 720             }
 721         }
 722
 723         if( simpleblock )
 724             sys.i_pts = (sys.i_chapter_time + simpleblock->GlobalTimecode()) / (mtime_t) 1000;
 725         else
 726             sys.i_pts = (sys.i_chapter_time + block->GlobalTimecode()) / (mtime_t) 1000;
 727
 728         if( i_track < tracks.size() )
 729         {
 730             if( sys.i_pts >= sys.i_start_pts )
 731             {
 732                 cluster = static_cast<KaxCluster*>(ep->UnGet( i_block_pos, i_cluster_pos ));
 733                 i_track_skipping = 0;
 734             }
 735             else if( tracks[i_track]->fmt.i_cat == VIDEO_ES )
 736             {
 737                 if( i_block_ref1 == 0 && tracks[i_track]->b_search_keyframe )
 738                 {
 739                     tracks[i_track]->b_search_keyframe = false;
 740                     i_track_skipping--;
 741                 }
 742                 if( !tracks[i_track]->b_search_keyframe )
 743                 {
 744                     BlockDecode( &sys.demuxer, block, simpleblock, sys.i_pts, 0, i_block_ref1 >= 0 || i_block_ref2 > 0 );
 745                 }
 746             }
 747         }
 748
 749         delete block;
 750     }
 751
 752     /* FIXME current ES_OUT_SET_NEXT_DISPLAY_TIME does not work that well if
 753      * the delay is too high. */
 754     if( sys.i_pts + 500*1000 < sys.i_start_pts )
 755     {
 756         sys.i_start_pts = sys.i_pts;
 757
 758         es_out_Control( sys.demuxer.out, ES_OUT_SET_NEXT_DISPLAY_TIME, sys.i_start_pts );
 759     }
 760 }
 761
 762
 763 /*****************************************************************************
 764  * Demux: reads and demuxes data packets
 765  *****************************************************************************
 766  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 767  *****************************************************************************/
 768 static int Demux( demux_t *p_demux)
 769 {
 770     demux_sys_t        *p_sys = p_demux->p_sys;
 771
 772     vlc_mutex_lock( &p_sys->lock_demuxer );
 773
 774     virtual_segment_c  *p_vsegment = p_sys->p_current_segment;
 775     matroska_segment_c *p_segment = p_vsegment->Segment();
 776     if ( p_segment == NULL ) return 0;
 777     int                i_block_count = 0;
 778     int                i_return = 0;
 779
 780     for( ;; )
 781     {
 782         if ( p_sys->demuxer.b_die )
 783             break;
 784
 785         if( p_sys->i_pts >= p_sys->i_start_pts  )
 786             if ( p_vsegment->UpdateCurrentToChapter( *p_demux ) )
 787             {
 788                 i_return = 1;
 789                 break;
 790             }
 791
 792         if ( p_vsegment->Edition() && p_vsegment->Edition()->b_ordered && p_vsegment->CurrentChapter() == NULL )
 793         {
 794             /* nothing left to read in this ordered edition */
 795             if ( !p_vsegment->SelectNext() )
 796                 break;
 797             p_segment->UnSelect( );
 798
 799             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 800
 801             /* switch to the next segment */
 802             p_segment = p_vsegment->Segment();
 803             if ( !p_segment->Select( 0 ) )
 804             {
 805                 msg_Err( p_demux, "Failed to select new segment" );
 806                 break;
 807             }
 808             continue;
 809         }
 810
 811         KaxBlock *block;
 812         KaxSimpleBlock *simpleblock;
 813         int64_t i_block_duration = 0;
 814         int64_t i_block_ref1;
 815         int64_t i_block_ref2;
 816
 817         if( p_segment->BlockGet( block, simpleblock, &i_block_ref1, &i_block_ref2, &i_block_duration ) )
 818         {
 819             if ( p_vsegment->Edition() && p_vsegment->Edition()->b_ordered )
 820             {
 821                 const chapter_item_c *p_chap = p_vsegment->CurrentChapter();
 822                 // check if there are more chapters to read
 823                 if ( p_chap != NULL )
 824                 {
 825                     /* TODO handle successive chapters with the same user_start_time/user_end_time
 826                     if ( p_chap->i_user_start_time == p_chap->i_user_start_time )
 827                         p_vsegment->SelectNext();
 828                     */
 829                     p_sys->i_pts = p_chap->i_user_end_time;
 830                     p_sys->i_pts++; // trick to avoid staying on segments with no duration and no content
 831
 832                     i_return = 1;
 833                 }
 834
 835                 break;
 836             }
 837             else
 838             {
 839                 msg_Warn( p_demux, "cannot get block EOF?" );
 840                 p_segment->UnSelect( );
 841
 842                 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 843
 844                 /* switch to the next segment */
 845                 if ( !p_vsegment->SelectNext() )
 846                     // no more segments in this stream
 847                     break;
 848                 p_segment = p_vsegment->Segment();
 849                 if ( !p_segment->Select( 0 ) )
 850                 {
 851                     msg_Err( p_demux, "Failed to select new segment" );
 852                     break;
 853                 }
 854
 855                 continue;
 856             }
 857         }
 858
 859         if( simpleblock != NULL )
 860             p_sys->i_pts = (p_sys->i_chapter_time + simpleblock->GlobalTimecode()) / (mtime_t) 1000;
 861         else
 862             p_sys->i_pts = (p_sys->i_chapter_time + block->GlobalTimecode()) / (mtime_t) 1000;
 863
 864         es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pts );
 865
 866         if( p_sys->i_pts >= p_sys->i_start_pts  )
 867         {
 868             if ( p_vsegment->UpdateCurrentToChapter( *p_demux ) )
 869             {
 870                 i_return = 1;
 871                 delete block;
 872                 break;
 873             }
 874         }
 875
 876         if ( p_vsegment->Edition() && p_vsegment->Edition()->b_ordered && p_vsegment->CurrentChapter() == NULL )
 877         {
 878             /* nothing left to read in this ordered edition */
 879             if ( !p_vsegment->SelectNext() )
 880             {
 881                 delete block;
 882                 break;
 883             }
 884             p_segment->UnSelect( );
 885
 886             es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 887
 888             /* switch to the next segment */
 889             p_segment = p_vsegment->Segment();
 890             if ( !p_segment->Select( 0 ) )
 891             {
 892                 msg_Err( p_demux, "Failed to select new segment" );
 893                 delete block;
 894                 break;
 895             }
 896             delete block;
 897             continue;
 898         }
 899
 900         BlockDecode( p_demux, block, simpleblock, p_sys->i_pts, i_block_duration, i_block_ref1 >= 0 || i_block_ref2 > 0 );
 901
 902         delete block;
 903         i_block_count++;
 904
 905         // TODO optimize when there is need to leave or when seeking has been called
 906         if( i_block_count > 5 )
 907         {
 908             i_return = 1;
 909             break;
 910         }
 911     }
 912
 913     vlc_mutex_unlock( &p_sys->lock_demuxer );
 914
 915     return i_return;
 916 }
 917