git.sesse.net Git - vlc/blob - modules/demux/asf/asf.c

   1 /*****************************************************************************
   2  * asf.c : ASF demux module
   3  *****************************************************************************
   4  * Copyright © 2002-2004, 2006-2008, 2010 VLC authors and VideoLAN
   5  *
   6  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32 #include <vlc_plugin.h>
  33 #include <vlc_demux.h>
  34 #include <vlc_dialog.h>
  35
  36 #include <vlc_meta.h>                  /* vlc_meta_Set*, vlc_meta_New */
  37 #include <vlc_access.h>                /* GET_PRIVATE_ID_STATE */
  38 #include <vlc_codecs.h>                /* VLC_BITMAPINFOHEADER, WAVEFORMATEX */
  39
  40 #include "libasf.h"
  41
  42 /* TODO
  43  *  - add support for the newly added object: language, bitrate,
  44  *                                            extended stream properties.
  45  */
  46
  47 /*****************************************************************************
  48  * Module descriptor
  49  *****************************************************************************/
  50 static int  Open  ( vlc_object_t * );
  51 static void Close ( vlc_object_t * );
  52
  53 vlc_module_begin ()
  54     set_category( CAT_INPUT )
  55     set_subcategory( SUBCAT_INPUT_DEMUX )
  56     set_description( N_("ASF/WMV demuxer") )
  57     set_capability( "demux", 200 )
  58     set_callbacks( Open, Close )
  59     add_shortcut( "asf", "wmv" )
  60 vlc_module_end ()
  61
  62
  63 /*****************************************************************************
  64  * Local prototypes
  65  *****************************************************************************/
  66 static int Demux  ( demux_t * );
  67 static int Control( demux_t *, int i_query, va_list args );
  68
  69 typedef struct
  70 {
  71     int i_cat;
  72
  73     es_out_id_t     *p_es;
  74
  75     asf_object_stream_properties_t *p_sp;
  76
  77     mtime_t i_time;
  78
  79     block_t         *p_frame; /* use to gather complete frame */
  80
  81 } asf_track_t;
  82
  83 struct demux_sys_t
  84 {
  85     mtime_t             i_time;     /* s */
  86     mtime_t             i_length;   /* length of file file */
  87     int64_t             i_bitrate;  /* global file bitrate */
  88
  89     asf_object_root_t            *p_root;
  90     asf_object_file_properties_t *p_fp;
  91
  92     unsigned int        i_track;
  93     asf_track_t         *track[128]; /* track number is stored on 7 bits */
  94
  95     int64_t             i_data_begin;
  96     int64_t             i_data_end;
  97
  98     bool                b_index;
  99     unsigned int        i_seek_track;
 100     unsigned int        i_wait_keyframe;
 101
 102     vlc_meta_t          *meta;
 103 };
 104
 105 static mtime_t  GetMoviePTS( demux_sys_t * );
 106 static int      DemuxInit( demux_t * );
 107 static void     DemuxEnd( demux_t * );
 108 static int      DemuxPacket( demux_t * );
 109
 110 /*****************************************************************************
 111  * Open: check file and initializes ASF structures
 112  *****************************************************************************/
 113 static int Open( vlc_object_t * p_this )
 114 {
 115     demux_t     *p_demux = (demux_t *)p_this;
 116     demux_sys_t *p_sys;
 117     guid_t      guid;
 118     const uint8_t     *p_peek;
 119
 120     /* A little test to see if it could be a asf stream */
 121     if( stream_Peek( p_demux->s, &p_peek, 16 ) < 16 ) return VLC_EGENERIC;
 122
 123     ASF_GetGUID( &guid, p_peek );
 124     if( !guidcmp( &guid, &asf_object_header_guid ) ) return VLC_EGENERIC;
 125
 126     /* Set p_demux fields */
 127     p_demux->pf_demux = Demux;
 128     p_demux->pf_control = Control;
 129     p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
 130
 131     /* Load the headers */
 132     if( DemuxInit( p_demux ) )
 133     {
 134         free( p_sys );
 135         return VLC_EGENERIC;
 136     }
 137     return VLC_SUCCESS;
 138 }
 139
 140
 141 /*****************************************************************************
 142  * Demux: read packet and send them to decoders
 143  *****************************************************************************/
 144 static int Demux( demux_t *p_demux )
 145 {
 146     demux_sys_t *p_sys = p_demux->p_sys;
 147
 148     for( ;; )
 149     {
 150         const uint8_t *p_peek;
 151         mtime_t i_length;
 152         mtime_t i_time_begin = GetMoviePTS( p_sys );
 153         int i_result;
 154
 155         if( !vlc_object_alive (p_demux) )
 156             break;
 157 #if 0
 158         /* FIXME: returns EOF too early for some mms streams */
 159         if( p_sys->i_data_end >= 0 &&
 160                 stream_Tell( p_demux->s ) >= p_sys->i_data_end )
 161             return 0; /* EOF */
 162 #endif
 163
 164         /* Check if we have concatenated files */
 165         if( stream_Peek( p_demux->s, &p_peek, 16 ) == 16 )
 166         {
 167             guid_t guid;
 168
 169             ASF_GetGUID( &guid, p_peek );
 170             if( guidcmp( &guid, &asf_object_header_guid ) )
 171             {
 172                 msg_Warn( p_demux, "found a new ASF header" );
 173                 /* We end this stream */
 174                 DemuxEnd( p_demux );
 175
 176                 /* And we prepare to read the next one */
 177                 if( DemuxInit( p_demux ) )
 178                 {
 179                     msg_Err( p_demux, "failed to load the new header" );
 180                     dialog_Fatal( p_demux, _("Could not demux ASF stream"), "%s",
 181                                     _("VLC failed to load the ASF header.") );
 182                     return 0;
 183                 }
 184                 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 185                 continue;
 186             }
 187         }
 188
 189         /* Read and demux a packet */
 190         if( ( i_result = DemuxPacket( p_demux ) ) <= 0 )
 191         {
 192             return i_result;
 193         }
 194         if( i_time_begin == -1 )
 195         {
 196             i_time_begin = GetMoviePTS( p_sys );
 197         }
 198         else
 199         {
 200             i_length = GetMoviePTS( p_sys ) - i_time_begin;
 201             if( i_length < 0 || i_length >= 40 * 1000 ) break;
 202         }
 203     }
 204
 205     /* Set the PCR */
 206     p_sys->i_time = GetMoviePTS( p_sys );
 207     if( p_sys->i_time >= 0 )
 208     {
 209         es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time+1 );
 210     }
 211
 212     return 1;
 213 }
 214
 215 /*****************************************************************************
 216  * Close: frees unused data
 217  *****************************************************************************/
 218 static void Close( vlc_object_t * p_this )
 219 {
 220     demux_t     *p_demux = (demux_t *)p_this;
 221
 222     DemuxEnd( p_demux );
 223
 224     free( p_demux->p_sys );
 225 }
 226
 227 /*****************************************************************************
 228  * SeekIndex: goto to i_date or i_percent
 229  *****************************************************************************/
 230 static int SeekPercent( demux_t *p_demux, int i_query, va_list args )
 231 {
 232     demux_sys_t *p_sys = p_demux->p_sys;
 233     p_sys->i_wait_keyframe = p_sys->i_seek_track ? 50 : 0;
 234     return demux_vaControlHelper( p_demux->s, p_sys->i_data_begin,
 235                                    p_sys->i_data_end, p_sys->i_bitrate,
 236                                    p_sys->p_fp->i_min_data_packet_size,
 237                                    i_query, args );
 238 }
 239
 240 static int SeekIndex( demux_t *p_demux, mtime_t i_date, float f_pos )
 241 {
 242     demux_sys_t *p_sys = p_demux->p_sys;
 243     asf_object_index_t *p_index;
 244
 245     msg_Dbg( p_demux, "seek with index: %i seconds, position %f",
 246              i_date >= 0 ? (int)(i_date/1000000) : -1, f_pos );
 247
 248     if( i_date < 0 )
 249         i_date = p_sys->i_length * f_pos;
 250
 251     p_index = ASF_FindObject( p_sys->p_root, &asf_object_simple_index_guid, 0 );
 252
 253     uint64_t i_entry = i_date * 10 / p_index->i_index_entry_time_interval;
 254     if( i_entry >= p_index->i_index_entry_count )
 255     {
 256         msg_Warn( p_demux, "Incomplete index" );
 257         return VLC_EGENERIC;
 258     }
 259
 260     p_sys->i_wait_keyframe = p_sys->i_seek_track ? 50 : 0;
 261
 262     uint64_t i_offset = (uint64_t)p_index->index_entry[i_entry].i_packet_number *
 263                         p_sys->p_fp->i_min_data_packet_size;
 264     return stream_Seek( p_demux->s, p_sys->i_data_begin + i_offset );
 265 }
 266
 267 static void SeekPrepare( demux_t *p_demux )
 268 {
 269     demux_sys_t *p_sys = p_demux->p_sys;
 270
 271     p_sys->i_time = -1;
 272     for( int i = 0; i < 128 ; i++ )
 273     {
 274         asf_track_t *tk = p_sys->track[i];
 275         if( !tk )
 276             continue;
 277
 278         tk->i_time = 1;
 279         if( tk->p_frame )
 280             block_ChainRelease( tk->p_frame );
 281         tk->p_frame = NULL;
 282     }
 283 }
 284
 285 /*****************************************************************************
 286  * Control:
 287  *****************************************************************************/
 288 static int Control( demux_t *p_demux, int i_query, va_list args )
 289 {
 290     demux_sys_t *p_sys = p_demux->p_sys;
 291     vlc_meta_t  *p_meta;
 292     int64_t     i64, *pi64;
 293     double      f, *pf;
 294
 295     switch( i_query )
 296     {
 297     case DEMUX_GET_LENGTH:
 298         pi64 = (int64_t*)va_arg( args, int64_t * );
 299         *pi64 = p_sys->i_length;
 300         return VLC_SUCCESS;
 301
 302     case DEMUX_GET_TIME:
 303         pi64 = (int64_t*)va_arg( args, int64_t * );
 304         if( p_sys->i_time < 0 ) return VLC_EGENERIC;
 305         *pi64 = p_sys->i_time;
 306         return VLC_SUCCESS;
 307
 308     case DEMUX_SET_TIME:
 309         SeekPrepare( p_demux );
 310
 311         if( p_sys->b_index && p_sys->i_length > 0 )
 312         {
 313             va_list acpy;
 314             va_copy( acpy, args );
 315             i64 = (int64_t)va_arg( acpy, int64_t );
 316             va_end( acpy );
 317
 318             if( !SeekIndex( p_demux, i64, -1 ) )
 319                 return VLC_SUCCESS;
 320         }
 321         return SeekPercent( p_demux, i_query, args );
 322
 323     case DEMUX_GET_POSITION:
 324         if( p_sys->i_time < 0 ) return VLC_EGENERIC;
 325         if( p_sys->i_length > 0 )
 326         {
 327             pf = (double*)va_arg( args, double * );
 328             *pf = p_sys->i_time / (double)p_sys->i_length;
 329             return VLC_SUCCESS;
 330         }
 331         return demux_vaControlHelper( p_demux->s, p_sys->i_data_begin,
 332                                        p_sys->i_data_end, p_sys->i_bitrate,
 333                                        p_sys->p_fp->i_min_data_packet_size,
 334                                        i_query, args );
 335
 336     case DEMUX_SET_POSITION:
 337         SeekPrepare( p_demux );
 338
 339         if( p_sys->b_index && p_sys->i_length > 0 )
 340         {
 341             va_list acpy;
 342             va_copy( acpy, args );
 343             f = (double)va_arg( acpy, double );
 344             va_end( acpy );
 345
 346             if( !SeekIndex( p_demux, -1, f ) )
 347                 return VLC_SUCCESS;
 348         }
 349         return SeekPercent( p_demux, i_query, args );
 350
 351     case DEMUX_GET_META:
 352         p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
 353         vlc_meta_Merge( p_meta, p_sys->meta );
 354         return VLC_SUCCESS;
 355
 356     default:
 357         return demux_vaControlHelper( p_demux->s, p_sys->i_data_begin,
 358                                        p_sys->i_data_end, p_sys->i_bitrate,
 359                                        p_sys->p_fp->i_min_data_packet_size,
 360                                        i_query, args );
 361     }
 362 }
 363
 364 /*****************************************************************************
 365  *
 366  *****************************************************************************/
 367 static mtime_t GetMoviePTS( demux_sys_t *p_sys )
 368 {
 369     mtime_t i_time = -1;
 370     int     i;
 371
 372     for( i = 0; i < 128 ; i++ )
 373     {
 374         asf_track_t *tk = p_sys->track[i];
 375
 376         if( tk && tk->p_es && tk->i_time > 0)
 377         {
 378             if( i_time < 0 ) i_time = tk->i_time;
 379             else i_time = __MIN( i_time, tk->i_time );
 380         }
 381     }
 382
 383     return i_time;
 384 }
 385
 386 #define GETVALUE2b( bits, var, def ) \
 387     switch( (bits)&0x03 ) \
 388     { \
 389         case 1: var = p_peek[i_skip]; i_skip++; break; \
 390         case 2: var = GetWLE( p_peek + i_skip );  i_skip+= 2; break; \
 391         case 3: var = GetDWLE( p_peek + i_skip ); i_skip+= 4; break; \
 392         case 0: \
 393         default: var = def; break;\
 394     }
 395
 396 static int DemuxPacket( demux_t *p_demux )
 397 {
 398     demux_sys_t *p_sys = p_demux->p_sys;
 399     int         i_data_packet_min = p_sys->p_fp->i_min_data_packet_size;
 400     const uint8_t *p_peek;
 401     int         i_skip;
 402
 403     int         i_packet_size_left;
 404     int         i_packet_flags;
 405     int         i_packet_property;
 406
 407     int         b_packet_multiple_payload;
 408     int         i_packet_length;
 409     int         i_packet_sequence;
 410     int         i_packet_padding_length;
 411
 412     uint32_t    i_packet_send_time;
 413     uint16_t    i_packet_duration;
 414     int         i_payload;
 415     int         i_payload_count;
 416     int         i_payload_length_type;
 417
 418
 419     if( stream_Peek( p_demux->s, &p_peek,i_data_packet_min)<i_data_packet_min )
 420     {
 421         msg_Warn( p_demux, "cannot peek while getting new packet, EOF ?" );
 422         return 0;
 423     }
 424     i_skip = 0;
 425
 426     /* *** parse error correction if present *** */
 427     if( p_peek[0]&0x80 )
 428     {
 429         unsigned int i_error_correction_length_type;
 430         unsigned int i_error_correction_data_length;
 431         unsigned int i_opaque_data_present;
 432
 433         i_error_correction_data_length = p_peek[0] & 0x0f;  // 4bits
 434         i_opaque_data_present = ( p_peek[0] >> 4 )& 0x01;    // 1bit
 435         i_error_correction_length_type = ( p_peek[0] >> 5 ) & 0x03; // 2bits
 436         i_skip += 1; // skip error correction flags
 437
 438         if( i_error_correction_length_type != 0x00 ||
 439             i_opaque_data_present != 0 ||
 440             i_error_correction_data_length != 0x02 )
 441         {
 442             goto loop_error_recovery;
 443         }
 444
 445         i_skip += i_error_correction_data_length;
 446     }
 447     else
 448     {
 449         msg_Warn( p_demux, "p_peek[0]&0x80 != 0x80" );
 450     }
 451
 452     /* sanity check */
 453     if( i_skip + 2 >= i_data_packet_min )
 454     {
 455         goto loop_error_recovery;
 456     }
 457
 458     i_packet_flags = p_peek[i_skip]; i_skip++;
 459     i_packet_property = p_peek[i_skip]; i_skip++;
 460
 461     b_packet_multiple_payload = i_packet_flags&0x01;
 462
 463     /* read some value */
 464     GETVALUE2b( i_packet_flags >> 5, i_packet_length, i_data_packet_min );
 465     GETVALUE2b( i_packet_flags >> 1, i_packet_sequence, 0 );
 466     GETVALUE2b( i_packet_flags >> 3, i_packet_padding_length, 0 );
 467
 468     if( i_packet_padding_length > i_packet_length )
 469     {
 470         msg_Warn( p_demux, "Too large padding: %d", i_packet_padding_length );
 471         goto loop_error_recovery;
 472     }
 473
 474     if( i_packet_length < i_data_packet_min )
 475     {
 476         /* if packet length too short, there is extra padding */
 477         i_packet_padding_length += i_data_packet_min - i_packet_length;
 478         i_packet_length = i_data_packet_min;
 479     }
 480
 481     i_packet_send_time = GetDWLE( p_peek + i_skip ); i_skip += 4;
 482     i_packet_duration  = GetWLE( p_peek + i_skip ); i_skip += 2;
 483
 484     i_packet_size_left = i_packet_length;
 485
 486     if( b_packet_multiple_payload )
 487     {
 488         i_payload_count = p_peek[i_skip] & 0x3f;
 489         i_payload_length_type = ( p_peek[i_skip] >> 6 )&0x03;
 490         i_skip++;
 491     }
 492     else
 493     {
 494         i_payload_count = 1;
 495         i_payload_length_type = 0x02; // unused
 496     }
 497
 498     for( i_payload = 0; i_payload < i_payload_count ; i_payload++ )
 499     {
 500         asf_track_t   *tk;
 501
 502         int i_packet_keyframe;
 503         unsigned int i_stream_number;
 504         int i_media_object_number;
 505         int i_media_object_offset;
 506         int i_replicated_data_length;
 507         int i_payload_data_length;
 508         int i_payload_data_pos;
 509         int i_sub_payload_data_length;
 510         int i_tmp;
 511
 512         mtime_t i_pts;
 513         mtime_t i_pts_delta;
 514
 515         if( i_skip >= i_packet_size_left )
 516         {
 517             /* prevent some segfault with invalid file */
 518             break;
 519         }
 520
 521         i_packet_keyframe = p_peek[i_skip] >> 7;
 522         i_stream_number = p_peek[i_skip++] & 0x7f;
 523
 524         GETVALUE2b( i_packet_property >> 4, i_media_object_number, 0 );
 525         GETVALUE2b( i_packet_property >> 2, i_tmp, 0 );
 526         GETVALUE2b( i_packet_property, i_replicated_data_length, 0 );
 527
 528         if( i_replicated_data_length > 1 ) // should be at least 8 bytes
 529         {
 530             i_pts = (mtime_t)GetDWLE( p_peek + i_skip + 4 ) * 1000;
 531             i_skip += i_replicated_data_length;
 532             i_pts_delta = 0;
 533
 534             i_media_object_offset = i_tmp;
 535
 536             if( i_skip >= i_packet_size_left )
 537             {
 538                 break;
 539             }
 540         }
 541         else if( i_replicated_data_length == 1 )
 542         {
 543             /* msg_Dbg( p_demux, "found compressed payload" ); */
 544
 545             i_pts = (mtime_t)i_tmp * 1000;
 546             i_pts_delta = (mtime_t)p_peek[i_skip] * 1000; i_skip++;
 547
 548             i_media_object_offset = 0;
 549         }
 550         else
 551         {
 552             i_pts = (mtime_t)i_packet_send_time * 1000;
 553             i_pts_delta = 0;
 554
 555             i_media_object_offset = i_tmp;
 556         }
 557
 558         i_pts = __MAX( i_pts - p_sys->p_fp->i_preroll * 1000, 0 );
 559         if( b_packet_multiple_payload )
 560         {
 561             GETVALUE2b( i_payload_length_type, i_payload_data_length, 0 );
 562         }
 563         else
 564         {
 565             i_payload_data_length = i_packet_length -
 566                                     i_packet_padding_length - i_skip;
 567         }
 568
 569         if( i_payload_data_length < 0 || i_payload_data_length > i_packet_size_left )
 570         {
 571             break;
 572         }
 573 #ifdef ASF_DEBUG
 574          msg_Dbg( p_demux,
 575                   "payload(%d/%d) stream_number:%d media_object_number:%d media_object_offset:%d replicated_data_length:%d payload_data_length %d",
 576                   i_payload + 1, i_payload_count, i_stream_number, i_media_object_number,
 577                   i_media_object_offset, i_replicated_data_length, i_payload_data_length );
 578 #endif
 579
 580         if( ( tk = p_sys->track[i_stream_number] ) == NULL )
 581         {
 582             msg_Warn( p_demux,
 583                       "undeclared stream[Id 0x%x]", i_stream_number );
 584             i_skip += i_payload_data_length;
 585             continue;   // over payload
 586         }
 587
 588         if( p_sys->i_wait_keyframe &&
 589             !(i_stream_number == p_sys->i_seek_track && i_packet_keyframe &&
 590               !i_media_object_offset) )
 591         {
 592             i_skip += i_payload_data_length;
 593             p_sys->i_wait_keyframe--;
 594             continue;   // over payload
 595         }
 596         p_sys->i_wait_keyframe = 0;
 597
 598         if( !tk->p_es )
 599         {
 600             i_skip += i_payload_data_length;
 601             continue;
 602         }
 603
 604
 605         for( i_payload_data_pos = 0;
 606              i_payload_data_pos < i_payload_data_length &&
 607                     i_packet_size_left > 0;
 608              i_payload_data_pos += i_sub_payload_data_length )
 609         {
 610             block_t *p_frag;
 611             int i_read;
 612
 613             // read sub payload length
 614             if( i_replicated_data_length == 1 )
 615             {
 616                 i_sub_payload_data_length = p_peek[i_skip]; i_skip++;
 617                 i_payload_data_pos++;
 618             }
 619             else
 620             {
 621                 i_sub_payload_data_length = i_payload_data_length;
 622             }
 623
 624             /* FIXME I don't use i_media_object_number, sould I ? */
 625             if( tk->p_frame && i_media_object_offset == 0 )
 626             {
 627                 /* send complete packet to decoder */
 628                 block_t *p_gather = block_ChainGather( tk->p_frame );
 629
 630                 if( p_gather->i_dts > VLC_TS_INVALID )
 631                     tk->i_time = p_gather->i_dts - VLC_TS_0;
 632
 633                 if( p_sys->i_time < 0 )
 634                     es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + tk->i_time );
 635
 636                 es_out_Send( p_demux->out, tk->p_es, p_gather );
 637
 638                 tk->p_frame = NULL;
 639             }
 640
 641             i_read = i_sub_payload_data_length + i_skip;
 642             if( ( p_frag = stream_Block( p_demux->s, i_read ) ) == NULL )
 643             {
 644                 msg_Warn( p_demux, "cannot read data" );
 645                 return 0;
 646             }
 647             i_packet_size_left -= i_read;
 648
 649             p_frag->p_buffer += i_skip;
 650             p_frag->i_buffer -= i_skip;
 651
 652             if( tk->p_frame == NULL )
 653             {
 654                 p_frag->i_pts = VLC_TS_0 + i_pts + i_payload * (mtime_t)i_pts_delta;
 655                 if( tk->i_cat != VIDEO_ES )
 656                     p_frag->i_dts = VLC_TS_0 + p_frag->i_pts;
 657                 else
 658                 {
 659                     p_frag->i_dts = VLC_TS_0 + p_frag->i_pts;
 660                     p_frag->i_pts = VLC_TS_INVALID;
 661                 }
 662             }
 663
 664             block_ChainAppend( &tk->p_frame, p_frag );
 665
 666             i_skip = 0;
 667             if( i_packet_size_left > 0 )
 668             {
 669                 if( stream_Peek( p_demux->s, &p_peek, i_packet_size_left )
 670                                                          < i_packet_size_left )
 671                 {
 672                     msg_Warn( p_demux, "cannot peek, EOF ?" );
 673                     return 0;
 674                 }
 675             }
 676         }
 677     }
 678
 679     if( i_packet_size_left > 0 )
 680     {
 681 #ifdef ASF_DEBUG
 682         if( i_packet_size_left > i_packet_padding_length )
 683             msg_Warn( p_demux, "Didn't read %d bytes in the packet",
 684                             i_packet_size_left - i_packet_padding_length );
 685         else if( i_packet_size_left < i_packet_padding_length )
 686             msg_Warn( p_demux, "Read %d too much bytes in the packet",
 687                             i_packet_padding_length - i_packet_size_left );
 688 #endif
 689         if( stream_Read( p_demux->s, NULL, i_packet_size_left )
 690                                                          < i_packet_size_left )
 691         {
 692             msg_Err( p_demux, "cannot skip data, EOF ?" );
 693             return 0;
 694         }
 695     }
 696
 697     return 1;
 698
 699 loop_error_recovery:
 700     msg_Warn( p_demux, "unsupported packet header" );
 701     if( p_sys->p_fp->i_min_data_packet_size != p_sys->p_fp->i_max_data_packet_size )
 702     {
 703         msg_Err( p_demux, "unsupported packet header, fatal error" );
 704         return -1;
 705     }
 706     if( stream_Read( p_demux->s, NULL, i_data_packet_min ) != i_data_packet_min )
 707     {
 708         msg_Warn( p_demux, "cannot skip data, EOF ?" );
 709         return 0;
 710     }
 711
 712     return 1;
 713 }
 714
 715 /*****************************************************************************
 716  *
 717  *****************************************************************************/
 718 static int DemuxInit( demux_t *p_demux )
 719 {
 720     demux_sys_t *p_sys = p_demux->p_sys;
 721
 722     /* init context */
 723     p_sys->i_time   = -1;
 724     p_sys->i_length = 0;
 725     p_sys->i_bitrate = 0;
 726     p_sys->p_root   = NULL;
 727     p_sys->p_fp     = NULL;
 728     p_sys->b_index  = 0;
 729     p_sys->i_track  = 0;
 730     p_sys->i_seek_track = 0;
 731     p_sys->i_wait_keyframe = 0;
 732     for( int i = 0; i < 128; i++ )
 733     {
 734         p_sys->track[i] = NULL;
 735     }
 736     p_sys->i_data_begin = -1;
 737     p_sys->i_data_end   = -1;
 738     p_sys->meta         = NULL;
 739
 740     /* Now load all object ( except raw data ) */
 741     bool b_seekable;
 742     stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &b_seekable );
 743     if( !(p_sys->p_root = ASF_ReadObjectRoot(p_demux->s, b_seekable)) )
 744     {
 745         msg_Warn( p_demux, "ASF plugin discarded (not a valid file)" );
 746         return VLC_EGENERIC;
 747     }
 748     p_sys->p_fp = p_sys->p_root->p_fp;
 749
 750     if( p_sys->p_fp->i_min_data_packet_size != p_sys->p_fp->i_max_data_packet_size )
 751     {
 752         msg_Warn( p_demux, "ASF plugin discarded (invalid file_properties object)" );
 753         goto error;
 754     }
 755
 756     p_sys->i_track = ASF_CountObject( p_sys->p_root->p_hdr,
 757                                       &asf_object_stream_properties_guid );
 758     if( p_sys->i_track <= 0 )
 759     {
 760         msg_Warn( p_demux, "ASF plugin discarded (cannot find any stream!)" );
 761         goto error;
 762     }
 763     msg_Dbg( p_demux, "found %d streams", p_sys->i_track );
 764
 765     /* check if index is available */
 766     asf_object_index_t *p_index = ASF_FindObject( p_sys->p_root,
 767                                                   &asf_object_simple_index_guid, 0 );
 768     const bool b_index = p_index && p_index->i_index_entry_count;
 769
 770     /* Find the extended header if any */
 771     asf_object_t *p_hdr_ext = ASF_FindObject( p_sys->p_root->p_hdr,
 772                                               &asf_object_header_extension_guid, 0 );
 773
 774     asf_object_language_list_t *p_languages = NULL;
 775     if( p_hdr_ext )
 776         p_languages = ASF_FindObject( p_hdr_ext, &asf_object_language_list, 0 );
 777
 778     for( unsigned i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
 779     {
 780         asf_track_t    *tk;
 781         asf_object_stream_properties_t *p_sp;
 782         asf_object_extended_stream_properties_t *p_esp;
 783         bool b_access_selected;
 784
 785         p_sp = ASF_FindObject( p_sys->p_root->p_hdr,
 786                                &asf_object_stream_properties_guid,
 787                                i_stream );
 788         p_esp = NULL;
 789
 790         tk = p_sys->track[p_sp->i_stream_number] = malloc( sizeof( asf_track_t ) );
 791         memset( tk, 0, sizeof( asf_track_t ) );
 792
 793         tk->i_time = -1;
 794         tk->p_sp = p_sp;
 795         tk->p_es = NULL;
 796         tk->p_frame = NULL;
 797
 798         /* Check (in case of mms) if this track is selected (ie will receive data) */
 799         if( !stream_Control( p_demux->s, STREAM_CONTROL_ACCESS, ACCESS_GET_PRIVATE_ID_STATE,
 800                              p_sp->i_stream_number, &b_access_selected ) &&
 801             !b_access_selected )
 802         {
 803             tk->i_cat = UNKNOWN_ES;
 804             msg_Dbg( p_demux, "ignoring not selected stream(ID:%d) (by access)",
 805                      p_sp->i_stream_number );
 806             continue;
 807         }
 808
 809         /* Find the associated extended_stream_properties if any */
 810         if( p_hdr_ext )
 811         {
 812             int i_ext_stream = ASF_CountObject( p_hdr_ext,
 813                                                 &asf_object_extended_stream_properties_guid );
 814             for( int i = 0; i < i_ext_stream; i++ )
 815             {
 816                 asf_object_t *p_tmp =
 817                     ASF_FindObject( p_hdr_ext,
 818                                     &asf_object_extended_stream_properties_guid, i );
 819                 if( p_tmp->ext_stream.i_stream_number == p_sp->i_stream_number )
 820                 {
 821                     p_esp = &p_tmp->ext_stream;
 822                     break;
 823                 }
 824             }
 825         }
 826
 827         es_format_t fmt;
 828
 829         if( guidcmp( &p_sp->i_stream_type, &asf_object_stream_type_audio ) &&
 830             p_sp->i_type_specific_data_length >= sizeof( WAVEFORMATEX ) - 2 )
 831         {
 832             uint8_t *p_data = p_sp->p_type_specific_data;
 833             int i_format;
 834
 835             es_format_Init( &fmt, AUDIO_ES, 0 );
 836             i_format = GetWLE( &p_data[0] );
 837             wf_tag_to_fourcc( i_format, &fmt.i_codec, NULL );
 838             fmt.audio.i_channels        = GetWLE(  &p_data[2] );
 839             fmt.audio.i_rate            = GetDWLE( &p_data[4] );
 840             fmt.i_bitrate               = GetDWLE( &p_data[8] ) * 8;
 841             fmt.audio.i_blockalign      = GetWLE(  &p_data[12] );
 842             fmt.audio.i_bitspersample   = GetWLE(  &p_data[14] );
 843
 844             if( p_sp->i_type_specific_data_length > sizeof( WAVEFORMATEX ) &&
 845                 i_format != WAVE_FORMAT_MPEGLAYER3 &&
 846                 i_format != WAVE_FORMAT_MPEG )
 847             {
 848                 fmt.i_extra = __MIN( GetWLE( &p_data[16] ),
 849                                      p_sp->i_type_specific_data_length -
 850                                      sizeof( WAVEFORMATEX ) );
 851                 fmt.p_extra = malloc( fmt.i_extra );
 852                 memcpy( fmt.p_extra, &p_data[sizeof( WAVEFORMATEX )],
 853                         fmt.i_extra );
 854             }
 855
 856             msg_Dbg( p_demux, "added new audio stream(codec:0x%x,ID:%d)",
 857                     GetWLE( p_data ), p_sp->i_stream_number );
 858         }
 859         else if( guidcmp( &p_sp->i_stream_type,
 860                               &asf_object_stream_type_video ) &&
 861                  p_sp->i_type_specific_data_length >= 11 +
 862                  sizeof( VLC_BITMAPINFOHEADER ) )
 863         {
 864             uint8_t      *p_data = &p_sp->p_type_specific_data[11];
 865
 866             es_format_Init( &fmt, VIDEO_ES,
 867                             VLC_FOURCC( p_data[16], p_data[17],
 868                                         p_data[18], p_data[19] ) );
 869             fmt.video.i_width = GetDWLE( p_data + 4 );
 870             fmt.video.i_height= GetDWLE( p_data + 8 );
 871
 872             if( p_esp && p_esp->i_average_time_per_frame > 0 )
 873             {
 874                 fmt.video.i_frame_rate = 10000000;
 875                 fmt.video.i_frame_rate_base = p_esp->i_average_time_per_frame;
 876             }
 877
 878             if( fmt.i_codec == VLC_FOURCC( 'D','V','R',' ') )
 879             {
 880                 /* DVR-MS special ASF */
 881                 fmt.i_codec = VLC_FOURCC( 'm','p','g','2' ) ;
 882                 fmt.b_packetized = false;
 883             }
 884
 885             if( p_sp->i_type_specific_data_length > 11 +
 886                 sizeof( VLC_BITMAPINFOHEADER ) )
 887             {
 888                 fmt.i_extra = __MIN( GetDWLE( p_data ),
 889                                      p_sp->i_type_specific_data_length - 11 -
 890                                      sizeof( VLC_BITMAPINFOHEADER ) );
 891                 fmt.p_extra = malloc( fmt.i_extra );
 892                 memcpy( fmt.p_extra, &p_data[sizeof( VLC_BITMAPINFOHEADER )],
 893                         fmt.i_extra );
 894             }
 895
 896             /* Look for an aspect ratio */
 897             if( p_sys->p_root->p_metadata )
 898             {
 899                 asf_object_metadata_t *p_meta = p_sys->p_root->p_metadata;
 900                 int i_aspect_x = 0, i_aspect_y = 0;
 901                 unsigned int i;
 902
 903                 for( i = 0; i < p_meta->i_record_entries_count; i++ )
 904                 {
 905                     if( !strcmp( p_meta->record[i].psz_name, "AspectRatioX" ) )
 906                     {
 907                         if( (!i_aspect_x && !p_meta->record[i].i_stream) ||
 908                             p_meta->record[i].i_stream ==
 909                             p_sp->i_stream_number )
 910                             i_aspect_x = p_meta->record[i].i_val;
 911                     }
 912                     if( !strcmp( p_meta->record[i].psz_name, "AspectRatioY" ) )
 913                     {
 914                         if( (!i_aspect_y && !p_meta->record[i].i_stream) ||
 915                             p_meta->record[i].i_stream ==
 916                             p_sp->i_stream_number )
 917                             i_aspect_y = p_meta->record[i].i_val;
 918                     }
 919                 }
 920
 921                 if( i_aspect_x && i_aspect_y )
 922                 {
 923                     fmt.video.i_sar_num = i_aspect_x;
 924                     fmt.video.i_sar_den = i_aspect_y;
 925                 }
 926             }
 927
 928             /* If there is a video track then use the index for seeking */
 929             p_sys->b_index = b_index;
 930
 931             msg_Dbg( p_demux, "added new video stream(ID:%d)",
 932                      p_sp->i_stream_number );
 933         }
 934         else if( guidcmp( &p_sp->i_stream_type, &asf_object_extended_stream_header ) &&
 935             p_sp->i_type_specific_data_length >= 64 )
 936         {
 937             /* Now follows a 64 byte header of which we don't know much */
 938             guid_t  *p_ref  = (guid_t *)p_sp->p_type_specific_data;
 939             uint8_t *p_data = p_sp->p_type_specific_data + 64;
 940             unsigned int i_data = p_sp->i_type_specific_data_length - 64;
 941
 942             msg_Dbg( p_demux, "Ext stream header detected. datasize = %d", p_sp->i_type_specific_data_length );
 943             if( guidcmp( p_ref, &asf_object_extended_stream_type_audio ) &&
 944                 i_data >= sizeof( WAVEFORMATEX ) - 2)
 945             {
 946                 int      i_format;
 947                 es_format_Init( &fmt, AUDIO_ES, 0 );
 948                 i_format = GetWLE( &p_data[0] );
 949                 if( i_format == 0 )
 950                     fmt.i_codec = VLC_CODEC_A52;
 951                 else
 952                     wf_tag_to_fourcc( i_format, &fmt.i_codec, NULL );
 953                 fmt.audio.i_channels        = GetWLE(  &p_data[2] );
 954                 fmt.audio.i_rate            = GetDWLE( &p_data[4] );
 955                 fmt.i_bitrate               = GetDWLE( &p_data[8] ) * 8;
 956                 fmt.audio.i_blockalign      = GetWLE(  &p_data[12] );
 957                 fmt.audio.i_bitspersample   = GetWLE(  &p_data[14] );
 958                 fmt.b_packetized = true;
 959
 960                 if( p_sp->i_type_specific_data_length > sizeof( WAVEFORMATEX ) &&
 961                     i_format != WAVE_FORMAT_MPEGLAYER3 &&
 962                     i_format != WAVE_FORMAT_MPEG )
 963                 {
 964                     fmt.i_extra = __MIN( GetWLE( &p_data[16] ),
 965                                          p_sp->i_type_specific_data_length -
 966                                          sizeof( WAVEFORMATEX ) );
 967                     fmt.p_extra = malloc( fmt.i_extra );
 968                     memcpy( fmt.p_extra, &p_data[sizeof( WAVEFORMATEX )],
 969                         fmt.i_extra );
 970                 }
 971
 972                 msg_Dbg( p_demux, "added new audio stream (codec:0x%x,ID:%d)",
 973                     i_format, p_sp->i_stream_number );
 974             }
 975             else
 976             {
 977                 es_format_Init( &fmt, UNKNOWN_ES, 0 );
 978             }
 979         }
 980         else
 981         {
 982             es_format_Init( &fmt, UNKNOWN_ES, 0 );
 983         }
 984
 985         tk->i_cat = fmt.i_cat;
 986         if( fmt.i_cat != UNKNOWN_ES )
 987         {
 988             if( p_esp && p_languages &&
 989                 p_esp->i_language_index >= 0 &&
 990                 p_esp->i_language_index < p_languages->i_language )
 991             {
 992                 fmt.psz_language = strdup( p_languages->ppsz_language[p_esp->i_language_index] );
 993                 char *p;
 994                 if( fmt.psz_language && (p = strchr( fmt.psz_language, '-' )) )
 995                     *p = '\0';
 996             }
 997
 998             /* Set the track on which we'll do our seeking to the first video track */
 999             if(!p_sys->i_seek_track && fmt.i_cat == VIDEO_ES)
1000                 p_sys->i_seek_track = p_sp->i_stream_number;
1001
1002             tk->p_es = es_out_Add( p_demux->out, &fmt );
1003         }
1004         else
1005         {
1006             msg_Dbg( p_demux, "ignoring unknown stream(ID:%d)",
1007                      p_sp->i_stream_number );
1008         }
1009         es_format_Clean( &fmt );
1010     }
1011
1012     p_sys->i_data_begin = p_sys->p_root->p_data->i_object_pos + 50;
1013     if( p_sys->p_root->p_data->i_object_size != 0 )
1014     { /* local file */
1015         p_sys->i_data_end = p_sys->p_root->p_data->i_object_pos +
1016                                     p_sys->p_root->p_data->i_object_size;
1017     }
1018     else
1019     { /* live/broacast */
1020         p_sys->i_data_end = -1;
1021     }
1022
1023     /* go to first packet */
1024     stream_Seek( p_demux->s, p_sys->i_data_begin );
1025
1026     /* try to calculate movie time */
1027     if( p_sys->p_fp->i_data_packets_count > 0 )
1028     {
1029         int64_t i_count;
1030         int64_t i_size = stream_Size( p_demux->s );
1031
1032         if( p_sys->i_data_end > 0 && i_size > p_sys->i_data_end )
1033         {
1034             i_size = p_sys->i_data_end;
1035         }
1036
1037         /* real number of packets */
1038         i_count = ( i_size - p_sys->i_data_begin ) /
1039                   p_sys->p_fp->i_min_data_packet_size;
1040
1041         /* calculate the time duration in micro-s */
1042         p_sys->i_length = (mtime_t)p_sys->p_fp->i_play_duration / 10 *
1043                    (mtime_t)i_count /
1044                    (mtime_t)p_sys->p_fp->i_data_packets_count - p_sys->p_fp->i_preroll * 1000;
1045         if( p_sys->i_length < 0 )
1046             p_sys->i_length = 0;
1047
1048         if( p_sys->i_length > 0 )
1049         {
1050             p_sys->i_bitrate = 8 * i_size * (int64_t)1000000 / p_sys->i_length;
1051         }
1052     }
1053
1054     /* Create meta information */
1055     p_sys->meta = vlc_meta_New();
1056
1057     asf_object_content_description_t *p_cd;
1058     if( ( p_cd = ASF_FindObject( p_sys->p_root->p_hdr,
1059                                  &asf_object_content_description_guid, 0 ) ) )
1060     {
1061         if( p_cd->psz_title && *p_cd->psz_title )
1062         {
1063             vlc_meta_SetTitle( p_sys->meta, p_cd->psz_title );
1064         }
1065         if( p_cd->psz_artist && *p_cd->psz_artist )
1066         {
1067              vlc_meta_SetArtist( p_sys->meta, p_cd->psz_artist );
1068         }
1069         if( p_cd->psz_copyright && *p_cd->psz_copyright )
1070         {
1071             vlc_meta_SetCopyright( p_sys->meta, p_cd->psz_copyright );
1072         }
1073         if( p_cd->psz_description && *p_cd->psz_description )
1074         {
1075             vlc_meta_SetDescription( p_sys->meta, p_cd->psz_description );
1076         }
1077         if( p_cd->psz_rating && *p_cd->psz_rating )
1078         {
1079             vlc_meta_SetRating( p_sys->meta, p_cd->psz_rating );
1080         }
1081     }
1082     /// \tood Fix Child meta for ASF tracks
1083 #if 0
1084     for( i_stream = 0, i = 0; i < 128; i++ )
1085     {
1086         asf_object_codec_list_t *p_cl = ASF_FindObject( p_sys->p_root->p_hdr,
1087                                                         &asf_object_codec_list_guid, 0 );
1088
1089         if( p_sys->track[i] )
1090         {
1091             vlc_meta_t *tk = vlc_meta_New();
1092             TAB_APPEND( p_sys->meta->i_track, p_sys->meta->track, tk );
1093
1094             if( p_cl && i_stream < p_cl->i_codec_entries_count )
1095             {
1096                 if( p_cl->codec[i_stream].psz_name &&
1097                     *p_cl->codec[i_stream].psz_name )
1098                 {
1099                     vlc_meta_Add( tk, VLC_META_CODEC_NAME,
1100                                   p_cl->codec[i_stream].psz_name );
1101                 }
1102                 if( p_cl->codec[i_stream].psz_description &&
1103                     *p_cl->codec[i_stream].psz_description )
1104                 {
1105                     vlc_meta_Add( tk, VLC_META_CODEC_DESCRIPTION,
1106                                   p_cl->codec[i_stream].psz_description );
1107                 }
1108             }
1109             i_stream++;
1110         }
1111     }
1112 #endif
1113     return VLC_SUCCESS;
1114
1115 error:
1116     ASF_FreeObjectRoot( p_demux->s, p_sys->p_root );
1117     return VLC_EGENERIC;
1118 }
1119 /*****************************************************************************
1120  *
1121  *****************************************************************************/
1122 static void DemuxEnd( demux_t *p_demux )
1123 {
1124     demux_sys_t *p_sys = p_demux->p_sys;
1125
1126     if( p_sys->p_root )
1127     {
1128         ASF_FreeObjectRoot( p_demux->s, p_sys->p_root );
1129         p_sys->p_root = NULL;
1130     }
1131     if( p_sys->meta )
1132     {
1133         vlc_meta_Delete( p_sys->meta );
1134         p_sys->meta = NULL;
1135     }
1136
1137     for( int i = 0; i < 128; i++ )
1138     {
1139         asf_track_t *tk = p_sys->track[i];
1140
1141         if( tk )
1142         {
1143             if( tk->p_frame )
1144             {
1145                 block_ChainRelease( tk->p_frame );
1146             }
1147             if( tk->p_es )
1148             {
1149                 es_out_Del( p_demux->out, tk->p_es );
1150             }
1151             free( tk );
1152         }
1153         p_sys->track[i] = 0;
1154     }
1155 }
1156