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

   1 /*****************************************************************************
   2  * asf.c : ASF demux module
   3  *****************************************************************************
   4  * Copyright (C) 2002-2003 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_demux.h>
  35 #include <vlc_dialog.h>
  36
  37 #include <vlc_meta.h>
  38 #include <vlc_access.h>                /* GET_PRIVATE_ID_STATE */
  39 #include <vlc_codecs.h>                /* BITMAPINFOHEADER, WAVEFORMATEX */
  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 v1.0 demuxer") )
  57     set_capability( "demux", 200 )
  58     set_callbacks( Open, Close )
  59     add_shortcut( "asf" )
  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     vlc_meta_t          *meta;
 100 };
 101
 102 static mtime_t  GetMoviePTS( demux_sys_t * );
 103 static int      DemuxInit( demux_t * );
 104 static void     DemuxEnd( demux_t * );
 105 static int      DemuxPacket( demux_t * );
 106
 107 /*****************************************************************************
 108  * Open: check file and initializes ASF structures
 109  *****************************************************************************/
 110 static int Open( vlc_object_t * p_this )
 111 {
 112     demux_t     *p_demux = (demux_t *)p_this;
 113     demux_sys_t *p_sys;
 114     guid_t      guid;
 115     const uint8_t     *p_peek;
 116
 117     /* A little test to see if it could be a asf stream */
 118     if( stream_Peek( p_demux->s, &p_peek, 16 ) < 16 ) return VLC_EGENERIC;
 119
 120     ASF_GetGUID( &guid, p_peek );
 121     if( !ASF_CmpGUID( &guid, &asf_object_header_guid ) ) return VLC_EGENERIC;
 122
 123     /* Set p_demux fields */
 124     p_demux->pf_demux = Demux;
 125     p_demux->pf_control = Control;
 126     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 127     memset( p_sys, 0, sizeof( demux_sys_t ) );
 128
 129     /* Load the headers */
 130     if( DemuxInit( p_demux ) )
 131     {
 132         free( p_sys );
 133         return VLC_EGENERIC;
 134     }
 135     return VLC_SUCCESS;
 136 }
 137
 138
 139 /*****************************************************************************
 140  * Demux: read packet and send them to decoders
 141  *****************************************************************************/
 142 static int Demux( demux_t *p_demux )
 143 {
 144     demux_sys_t *p_sys = p_demux->p_sys;
 145
 146     for( ;; )
 147     {
 148         const uint8_t *p_peek;
 149         mtime_t i_length;
 150         mtime_t i_time_begin = GetMoviePTS( p_sys );
 151         int i_result;
 152
 153         if( !vlc_object_alive (p_demux) )
 154             break;
 155 #if 0
 156         /* FIXME: returns EOF too early for some mms streams */
 157         if( p_sys->i_data_end >= 0 &&
 158                 stream_Tell( p_demux->s ) >= p_sys->i_data_end )
 159             return 0; /* EOF */
 160 #endif
 161
 162         /* Check if we have concatenated files */
 163         if( stream_Peek( p_demux->s, &p_peek, 16 ) == 16 )
 164         {
 165             guid_t guid;
 166
 167             ASF_GetGUID( &guid, p_peek );
 168             if( ASF_CmpGUID( &guid, &asf_object_header_guid ) )
 169             {
 170                 msg_Warn( p_demux, "found a new ASF header" );
 171                 /* We end this stream */
 172                 DemuxEnd( p_demux );
 173
 174                 /* And we prepare to read the next one */
 175                 if( DemuxInit( p_demux ) )
 176                 {
 177                     msg_Err( p_demux, "failed to load the new header" );
 178                     dialog_Fatal( p_demux, _("Could not demux ASF stream"), "%s",
 179                                     _("VLC failed to load the ASF header.") );
 180                     return 0;
 181                 }
 182                 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 183                 continue;
 184             }
 185         }
 186
 187         /* Read and demux a packet */
 188         if( ( i_result = DemuxPacket( p_demux ) ) <= 0 )
 189         {
 190             return i_result;
 191         }
 192         if( i_time_begin == -1 )
 193         {
 194             i_time_begin = GetMoviePTS( p_sys );
 195         }
 196         else
 197         {
 198             i_length = GetMoviePTS( p_sys ) - i_time_begin;
 199             if( i_length < 0 || i_length >= 40 * 1000 ) break;
 200         }
 201     }
 202
 203     /* Set the PCR */
 204     p_sys->i_time = GetMoviePTS( p_sys );
 205     if( p_sys->i_time >= 0 )
 206     {
 207         es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time+1 );
 208     }
 209
 210     return 1;
 211 }
 212
 213 /*****************************************************************************
 214  * Close: frees unused data
 215  *****************************************************************************/
 216 static void Close( vlc_object_t * p_this )
 217 {
 218     demux_t     *p_demux = (demux_t *)p_this;
 219
 220     DemuxEnd( p_demux );
 221
 222     free( p_demux->p_sys );
 223 }
 224
 225 /*****************************************************************************
 226  * SeekIndex: goto to i_date or i_percent
 227  *****************************************************************************/
 228 static int SeekPercent( demux_t *p_demux, int i_query, va_list args )
 229 {
 230     demux_sys_t *p_sys = p_demux->p_sys;
 231     return demux_vaControlHelper( p_demux->s, p_sys->i_data_begin,
 232                                    p_sys->i_data_end, p_sys->i_bitrate,
 233                                    p_sys->p_fp->i_min_data_packet_size,
 234                                    i_query, args );
 235 }
 236
 237 static int SeekIndex( demux_t *p_demux, mtime_t i_date, float f_pos )
 238 {
 239     demux_sys_t *p_sys = p_demux->p_sys;
 240     asf_object_index_t *p_index;
 241
 242     msg_Dbg( p_demux, "seek with index: %i seconds, position %f",
 243              i_date >= 0 ? (int)(i_date/1000000) : -1, f_pos );
 244
 245     if( i_date < 0 )
 246         i_date = p_sys->i_length * f_pos;
 247
 248     p_index = ASF_FindObject( p_sys->p_root, &asf_object_index_guid, 0 );
 249
 250     uint64_t i_entry = i_date * 10 / p_index->i_index_entry_time_interval;
 251     if( i_entry >= p_index->i_index_entry_count )
 252     {
 253         msg_Warn( p_demux, "Incomplete index" );
 254         return VLC_EGENERIC;
 255     }
 256
 257     uint64_t i_offset = (uint64_t)p_index->index_entry[i_entry].i_packet_number *
 258                         p_sys->p_fp->i_min_data_packet_size;
 259     return stream_Seek( p_demux->s, p_sys->i_data_begin + i_offset );
 260 }
 261
 262 static void SeekPrepare( demux_t *p_demux )
 263 {
 264     demux_sys_t *p_sys = p_demux->p_sys;
 265
 266     p_sys->i_time = -1;
 267     for( int i = 0; i < 128 ; i++ )
 268     {
 269         asf_track_t *tk = p_sys->track[i];
 270         if( !tk )
 271             continue;
 272
 273         tk->i_time = 1;
 274         if( tk->p_frame )
 275             block_ChainRelease( tk->p_frame );
 276         tk->p_frame = NULL;
 277     }
 278 }
 279
 280 /*****************************************************************************
 281  * Control:
 282  *****************************************************************************/
 283 static int Control( demux_t *p_demux, int i_query, va_list args )
 284 {
 285     demux_sys_t *p_sys = p_demux->p_sys;
 286     vlc_meta_t  *p_meta;
 287     int64_t     i64, *pi64;
 288     double      f, *pf;
 289
 290     switch( i_query )
 291     {
 292     case DEMUX_GET_LENGTH:
 293         pi64 = (int64_t*)va_arg( args, int64_t * );
 294         *pi64 = p_sys->i_length;
 295         return VLC_SUCCESS;
 296
 297     case DEMUX_GET_TIME:
 298         pi64 = (int64_t*)va_arg( args, int64_t * );
 299         if( p_sys->i_time < 0 ) return VLC_EGENERIC;
 300         *pi64 = p_sys->i_time;
 301         return VLC_SUCCESS;
 302
 303     case DEMUX_SET_TIME:
 304         SeekPrepare( p_demux );
 305
 306         if( p_sys->b_index && p_sys->i_length > 0 )
 307         {
 308             va_list acpy;
 309             va_copy( acpy, args );
 310             i64 = (int64_t)va_arg( acpy, int64_t );
 311             va_end( acpy );
 312
 313             if( !SeekIndex( p_demux, i64, -1 ) )
 314                 return VLC_SUCCESS;
 315         }
 316         return SeekPercent( p_demux, i_query, args );
 317
 318     case DEMUX_GET_POSITION:
 319         if( p_sys->i_time < 0 ) return VLC_EGENERIC;
 320         if( p_sys->i_length > 0 )
 321         {
 322             pf = (double*)va_arg( args, double * );
 323             *pf = p_sys->i_time / (double)p_sys->i_length;
 324             return VLC_SUCCESS;
 325         }
 326         return demux_vaControlHelper( p_demux->s, p_sys->i_data_begin,
 327                                        p_sys->i_data_end, p_sys->i_bitrate,
 328                                        p_sys->p_fp->i_min_data_packet_size,
 329                                        i_query, args );
 330
 331     case DEMUX_SET_POSITION:
 332         SeekPrepare( p_demux );
 333
 334         if( p_sys->b_index && p_sys->i_length > 0 )
 335         {
 336             va_list acpy;
 337             va_copy( acpy, args );
 338             f = (double)va_arg( acpy, double );
 339             va_end( acpy );
 340
 341             if( !SeekIndex( p_demux, -1, f ) )
 342                 return VLC_SUCCESS;
 343         }
 344         return SeekPercent( p_demux, i_query, args );
 345
 346     case DEMUX_GET_META:
 347         p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
 348         vlc_meta_Merge( p_meta, p_sys->meta );
 349         return VLC_SUCCESS;
 350
 351     default:
 352         return demux_vaControlHelper( p_demux->s, p_sys->i_data_begin,
 353                                        p_sys->i_data_end, p_sys->i_bitrate,
 354                                        p_sys->p_fp->i_min_data_packet_size,
 355                                        i_query, args );
 356     }
 357 }
 358
 359 /*****************************************************************************
 360  *
 361  *****************************************************************************/
 362 static mtime_t GetMoviePTS( demux_sys_t *p_sys )
 363 {
 364     mtime_t i_time = -1;
 365     int     i;
 366
 367     for( i = 0; i < 128 ; i++ )
 368     {
 369         asf_track_t *tk = p_sys->track[i];
 370
 371         if( tk && tk->p_es && tk->i_time > 0)
 372         {
 373             if( i_time < 0 ) i_time = tk->i_time;
 374             else i_time = __MIN( i_time, tk->i_time );
 375         }
 376     }
 377
 378     return i_time;
 379 }
 380
 381 #define GETVALUE2b( bits, var, def ) \
 382     switch( (bits)&0x03 ) \
 383     { \
 384         case 1: var = p_peek[i_skip]; i_skip++; break; \
 385         case 2: var = GetWLE( p_peek + i_skip );  i_skip+= 2; break; \
 386         case 3: var = GetDWLE( p_peek + i_skip ); i_skip+= 4; break; \
 387         case 0: \
 388         default: var = def; break;\
 389     }
 390
 391 static int DemuxPacket( demux_t *p_demux )
 392 {
 393     demux_sys_t *p_sys = p_demux->p_sys;
 394     int         i_data_packet_min = p_sys->p_fp->i_min_data_packet_size;
 395     const uint8_t *p_peek;
 396     int         i_skip;
 397
 398     int         i_packet_size_left;
 399     int         i_packet_flags;
 400     int         i_packet_property;
 401
 402     int         b_packet_multiple_payload;
 403     int         i_packet_length;
 404     int         i_packet_sequence;
 405     int         i_packet_padding_length;
 406
 407     uint32_t    i_packet_send_time;
 408     uint16_t    i_packet_duration;
 409     int         i_payload;
 410     int         i_payload_count;
 411     int         i_payload_length_type;
 412
 413
 414     if( stream_Peek( p_demux->s, &p_peek,i_data_packet_min)<i_data_packet_min )
 415     {
 416         msg_Warn( p_demux, "cannot peek while getting new packet, EOF ?" );
 417         return 0;
 418     }
 419     i_skip = 0;
 420
 421     /* *** parse error correction if present *** */
 422     if( p_peek[0]&0x80 )
 423     {
 424         unsigned int i_error_correction_length_type;
 425         unsigned int i_error_correction_data_length;
 426         unsigned int i_opaque_data_present;
 427
 428         i_error_correction_data_length = p_peek[0] & 0x0f;  // 4bits
 429         i_opaque_data_present = ( p_peek[0] >> 4 )& 0x01;    // 1bit
 430         i_error_correction_length_type = ( p_peek[0] >> 5 ) & 0x03; // 2bits
 431         i_skip += 1; // skip error correction flags
 432
 433         if( i_error_correction_length_type != 0x00 ||
 434             i_opaque_data_present != 0 ||
 435             i_error_correction_data_length != 0x02 )
 436         {
 437             goto loop_error_recovery;
 438         }
 439
 440         i_skip += i_error_correction_data_length;
 441     }
 442     else
 443     {
 444         msg_Warn( p_demux, "p_peek[0]&0x80 != 0x80" );
 445     }
 446
 447     /* sanity check */
 448     if( i_skip + 2 >= i_data_packet_min )
 449     {
 450         goto loop_error_recovery;
 451     }
 452
 453     i_packet_flags = p_peek[i_skip]; i_skip++;
 454     i_packet_property = p_peek[i_skip]; i_skip++;
 455
 456     b_packet_multiple_payload = i_packet_flags&0x01;
 457
 458     /* read some value */
 459     GETVALUE2b( i_packet_flags >> 5, i_packet_length, i_data_packet_min );
 460     GETVALUE2b( i_packet_flags >> 1, i_packet_sequence, 0 );
 461     GETVALUE2b( i_packet_flags >> 3, i_packet_padding_length, 0 );
 462
 463     if( i_packet_padding_length > i_packet_length )
 464     {
 465         msg_Warn( p_demux, "Too large padding: %d", i_packet_padding_length );
 466         goto loop_error_recovery;
 467     }
 468
 469     i_packet_send_time = GetDWLE( p_peek + i_skip ); i_skip += 4;
 470     i_packet_duration  = GetWLE( p_peek + i_skip ); i_skip += 2;
 471
 472     /* FIXME I have to do that for some file, I don't known why */
 473     i_packet_size_left = i_data_packet_min /*i_packet_length*/ ;
 474
 475     if( b_packet_multiple_payload )
 476     {
 477         i_payload_count = p_peek[i_skip] & 0x3f;
 478         i_payload_length_type = ( p_peek[i_skip] >> 6 )&0x03;
 479         i_skip++;
 480     }
 481     else
 482     {
 483         i_payload_count = 1;
 484         i_payload_length_type = 0x02; // unused
 485     }
 486
 487     for( i_payload = 0; i_payload < i_payload_count ; i_payload++ )
 488     {
 489         asf_track_t   *tk;
 490
 491         int i_packet_keyframe;
 492         int i_stream_number;
 493         int i_media_object_number;
 494         int i_media_object_offset;
 495         int i_replicated_data_length;
 496         int i_payload_data_length;
 497         int i_payload_data_pos;
 498         int i_sub_payload_data_length;
 499         int i_tmp;
 500
 501         mtime_t i_pts;
 502         mtime_t i_pts_delta;
 503
 504         if( i_skip >= i_packet_size_left )
 505         {
 506             /* prevent some segfault with invalid file */
 507             break;
 508         }
 509
 510         i_packet_keyframe = p_peek[i_skip] >> 7;
 511         i_stream_number = p_peek[i_skip++] & 0x7f;
 512
 513         GETVALUE2b( i_packet_property >> 4, i_media_object_number, 0 );
 514         GETVALUE2b( i_packet_property >> 2, i_tmp, 0 );
 515         GETVALUE2b( i_packet_property, i_replicated_data_length, 0 );
 516
 517         if( i_replicated_data_length > 1 ) // should be at least 8 bytes
 518         {
 519             i_pts = (mtime_t)GetDWLE( p_peek + i_skip + 4 ) * 1000;
 520             i_skip += i_replicated_data_length;
 521             i_pts_delta = 0;
 522
 523             i_media_object_offset = i_tmp;
 524
 525             if( i_skip >= i_packet_size_left )
 526             {
 527                 break;
 528             }
 529         }
 530         else if( i_replicated_data_length == 1 )
 531         {
 532             /* msg_Dbg( p_demux, "found compressed payload" ); */
 533
 534             i_pts = (mtime_t)i_tmp * 1000;
 535             i_pts_delta = (mtime_t)p_peek[i_skip] * 1000; i_skip++;
 536
 537             i_media_object_offset = 0;
 538         }
 539         else
 540         {
 541             i_pts = (mtime_t)i_packet_send_time * 1000;
 542             i_pts_delta = 0;
 543
 544             i_media_object_offset = i_tmp;
 545         }
 546
 547         i_pts = __MAX( i_pts - p_sys->p_fp->i_preroll * 1000, 0 );
 548         if( b_packet_multiple_payload )
 549         {
 550             GETVALUE2b( i_payload_length_type, i_payload_data_length, 0 );
 551         }
 552         else
 553         {
 554             i_payload_data_length = i_packet_length -
 555                                     i_packet_padding_length - i_skip;
 556         }
 557
 558         if( i_payload_data_length < 0 || i_payload_data_length > i_packet_size_left )
 559         {
 560             break;
 561         }
 562 #if 0
 563          msg_Dbg( p_demux,
 564                   "payload(%d/%d) stream_number:%d media_object_number:%d media_object_offset:%d replicated_data_length:%d payload_data_length %d",
 565                   i_payload + 1, i_payload_count, i_stream_number, i_media_object_number,
 566                   i_media_object_offset, i_replicated_data_length, i_payload_data_length );
 567 #endif
 568
 569         if( ( tk = p_sys->track[i_stream_number] ) == NULL )
 570         {
 571             msg_Warn( p_demux,
 572                       "undeclared stream[Id 0x%x]", i_stream_number );
 573             i_skip += i_payload_data_length;
 574             continue;   // over payload
 575         }
 576
 577         if( !tk->p_es )
 578         {
 579             i_skip += i_payload_data_length;
 580             continue;
 581         }
 582
 583
 584         for( i_payload_data_pos = 0;
 585              i_payload_data_pos < i_payload_data_length &&
 586                     i_packet_size_left > 0;
 587              i_payload_data_pos += i_sub_payload_data_length )
 588         {
 589             block_t *p_frag;
 590             int i_read;
 591
 592             // read sub payload length
 593             if( i_replicated_data_length == 1 )
 594             {
 595                 i_sub_payload_data_length = p_peek[i_skip]; i_skip++;
 596                 i_payload_data_pos++;
 597             }
 598             else
 599             {
 600                 i_sub_payload_data_length = i_payload_data_length;
 601             }
 602
 603             /* FIXME I don't use i_media_object_number, sould I ? */
 604             if( tk->p_frame && i_media_object_offset == 0 )
 605             {
 606                 /* send complete packet to decoder */
 607                 block_t *p_gather = block_ChainGather( tk->p_frame );
 608
 609                 if( p_gather->i_dts > VLC_TS_INVALID )
 610                     tk->i_time = p_gather->i_dts - VLC_TS_0;
 611
 612                 if( p_sys->i_time < 0 )
 613                     es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + tk->i_time );
 614
 615                 es_out_Send( p_demux->out, tk->p_es, p_gather );
 616
 617                 tk->p_frame = NULL;
 618             }
 619
 620             i_read = i_sub_payload_data_length + i_skip;
 621             if( ( p_frag = stream_Block( p_demux->s, i_read ) ) == NULL )
 622             {
 623                 msg_Warn( p_demux, "cannot read data" );
 624                 return 0;
 625             }
 626             i_packet_size_left -= i_read;
 627
 628             p_frag->p_buffer += i_skip;
 629             p_frag->i_buffer -= i_skip;
 630
 631             if( tk->p_frame == NULL )
 632             {
 633                 p_frag->i_pts = VLC_TS_0 + i_pts + i_payload * (mtime_t)i_pts_delta;
 634                 if( tk->i_cat != VIDEO_ES )
 635                     p_frag->i_dts = VLC_TS_0 + p_frag->i_pts;
 636                 else
 637                 {
 638                     p_frag->i_dts = VLC_TS_0 + p_frag->i_pts;
 639                     p_frag->i_pts = VLC_TS_INVALID;
 640                 }
 641             }
 642
 643             block_ChainAppend( &tk->p_frame, p_frag );
 644
 645             i_skip = 0;
 646             if( i_packet_size_left > 0 )
 647             {
 648                 if( stream_Peek( p_demux->s, &p_peek, i_packet_size_left )
 649                                                          < i_packet_size_left )
 650                 {
 651                     msg_Warn( p_demux, "cannot peek, EOF ?" );
 652                     return 0;
 653                 }
 654             }
 655         }
 656     }
 657
 658     if( i_packet_size_left > 0 )
 659     {
 660 #ifdef ASF_DEBUG
 661         if( i_packet_size_left > i_packet_padding_length )
 662             msg_Warn( p_demux, "Didn't read %d bytes in the packet",
 663                             i_packet_size_left - i_packet_padding_length );
 664         else if( i_packet_size_left < i_packet_padding_length )
 665             msg_Warn( p_demux, "Read %d too much bytes in the packet",
 666                             i_packet_padding_length - i_packet_size_left );
 667 #endif
 668         if( stream_Read( p_demux->s, NULL, i_packet_size_left )
 669                                                          < i_packet_size_left )
 670         {
 671             msg_Err( p_demux, "cannot skip data, EOF ?" );
 672             return 0;
 673         }
 674     }
 675
 676     return 1;
 677
 678 loop_error_recovery:
 679     msg_Warn( p_demux, "unsupported packet header" );
 680     if( p_sys->p_fp->i_min_data_packet_size != p_sys->p_fp->i_max_data_packet_size )
 681     {
 682         msg_Err( p_demux, "unsupported packet header, fatal error" );
 683         return -1;
 684     }
 685     if( stream_Read( p_demux->s, NULL, i_data_packet_min ) != i_data_packet_min )
 686     {
 687         msg_Warn( p_demux, "cannot skip data, EOF ?" );
 688         return 0;
 689     }
 690
 691     return 1;
 692 }
 693
 694 /*****************************************************************************
 695  *
 696  *****************************************************************************/
 697 static int DemuxInit( demux_t *p_demux )
 698 {
 699     demux_sys_t *p_sys = p_demux->p_sys;
 700
 701     /* init context */
 702     p_sys->i_time   = -1;
 703     p_sys->i_length = 0;
 704     p_sys->i_bitrate = 0;
 705     p_sys->p_root   = NULL;
 706     p_sys->p_fp     = NULL;
 707     p_sys->b_index  = 0;
 708     p_sys->i_track  = 0;
 709     for( int i = 0; i < 128; i++ )
 710     {
 711         p_sys->track[i] = NULL;
 712     }
 713     p_sys->i_data_begin = -1;
 714     p_sys->i_data_end   = -1;
 715     p_sys->meta         = NULL;
 716
 717     /* Now load all object ( except raw data ) */
 718     bool b_seekable;
 719     stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &b_seekable );
 720     if( !(p_sys->p_root = ASF_ReadObjectRoot(p_demux->s, b_seekable)) )
 721     {
 722         msg_Warn( p_demux, "ASF plugin discarded (not a valid file)" );
 723         return VLC_EGENERIC;
 724     }
 725     p_sys->p_fp = p_sys->p_root->p_fp;
 726
 727     if( p_sys->p_fp->i_min_data_packet_size != p_sys->p_fp->i_max_data_packet_size )
 728     {
 729         msg_Warn( p_demux, "ASF plugin discarded (invalid file_properties object)" );
 730         goto error;
 731     }
 732
 733     p_sys->i_track = ASF_CountObject( p_sys->p_root->p_hdr,
 734                                       &asf_object_stream_properties_guid );
 735     if( p_sys->i_track <= 0 )
 736     {
 737         msg_Warn( p_demux, "ASF plugin discarded (cannot find any stream!)" );
 738         goto error;
 739     }
 740     msg_Dbg( p_demux, "found %d streams", p_sys->i_track );
 741
 742     /* check if index is available */
 743     asf_object_index_t *p_index = ASF_FindObject( p_sys->p_root,
 744                                                   &asf_object_index_guid, 0 );
 745     const bool b_index = p_index && p_index->i_index_entry_count;
 746
 747     /* Find the extended header if any */
 748     asf_object_t *p_hdr_ext = ASF_FindObject( p_sys->p_root->p_hdr,
 749                                               &asf_object_header_extension_guid, 0 );
 750
 751     asf_object_language_list_t *p_languages = NULL;
 752     if( p_hdr_ext )
 753         p_languages = ASF_FindObject( p_hdr_ext, &asf_object_language_list, 0 );
 754
 755     for( unsigned i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
 756     {
 757         asf_track_t    *tk;
 758         asf_object_stream_properties_t *p_sp;
 759         asf_object_extended_stream_properties_t *p_esp;
 760         bool b_access_selected;
 761
 762         p_sp = ASF_FindObject( p_sys->p_root->p_hdr,
 763                                &asf_object_stream_properties_guid,
 764                                i_stream );
 765         p_esp = NULL;
 766
 767         tk = p_sys->track[p_sp->i_stream_number] = malloc( sizeof( asf_track_t ) );
 768         memset( tk, 0, sizeof( asf_track_t ) );
 769
 770         tk->i_time = -1;
 771         tk->p_sp = p_sp;
 772         tk->p_es = NULL;
 773         tk->p_frame = NULL;
 774
 775         /* Check (in case of mms) if this track is selected (ie will receive data) */
 776         if( !stream_Control( p_demux->s, STREAM_CONTROL_ACCESS, ACCESS_GET_PRIVATE_ID_STATE,
 777                              p_sp->i_stream_number, &b_access_selected ) &&
 778             !b_access_selected )
 779         {
 780             tk->i_cat = UNKNOWN_ES;
 781             msg_Dbg( p_demux, "ignoring not selected stream(ID:%d) (by access)",
 782                      p_sp->i_stream_number );
 783             continue;
 784         }
 785
 786         /* Find the associated extended_stream_properties if any */
 787         if( p_hdr_ext )
 788         {
 789             int i_ext_stream = ASF_CountObject( p_hdr_ext,
 790                                                 &asf_object_extended_stream_properties );
 791             for( int i = 0; i < i_ext_stream; i++ )
 792             {
 793                 asf_object_t *p_tmp =
 794                     ASF_FindObject( p_hdr_ext,
 795                                     &asf_object_extended_stream_properties, i );
 796                 if( p_tmp->ext_stream.i_stream_number == p_sp->i_stream_number )
 797                 {
 798                     p_esp = &p_tmp->ext_stream;
 799                     break;
 800                 }
 801             }
 802         }
 803
 804         es_format_t fmt;
 805
 806         if( ASF_CmpGUID( &p_sp->i_stream_type, &asf_object_stream_type_audio ) &&
 807             p_sp->i_type_specific_data_length >= sizeof( WAVEFORMATEX ) - 2 )
 808         {
 809             uint8_t *p_data = p_sp->p_type_specific_data;
 810             int i_format;
 811
 812             es_format_Init( &fmt, AUDIO_ES, 0 );
 813             i_format = GetWLE( &p_data[0] );
 814             wf_tag_to_fourcc( i_format, &fmt.i_codec, NULL );
 815             fmt.audio.i_channels        = GetWLE(  &p_data[2] );
 816             fmt.audio.i_rate      = GetDWLE( &p_data[4] );
 817             fmt.i_bitrate         = GetDWLE( &p_data[8] ) * 8;
 818             fmt.audio.i_blockalign      = GetWLE(  &p_data[12] );
 819             fmt.audio.i_bitspersample   = GetWLE(  &p_data[14] );
 820
 821             if( p_sp->i_type_specific_data_length > sizeof( WAVEFORMATEX ) &&
 822                 i_format != WAVE_FORMAT_MPEGLAYER3 &&
 823                 i_format != WAVE_FORMAT_MPEG )
 824             {
 825                 fmt.i_extra = __MIN( GetWLE( &p_data[16] ),
 826                                      p_sp->i_type_specific_data_length -
 827                                      sizeof( WAVEFORMATEX ) );
 828                 fmt.p_extra = malloc( fmt.i_extra );
 829                 memcpy( fmt.p_extra, &p_data[sizeof( WAVEFORMATEX )],
 830                         fmt.i_extra );
 831             }
 832
 833             msg_Dbg( p_demux, "added new audio stream(codec:0x%x,ID:%d)",
 834                     GetWLE( p_data ), p_sp->i_stream_number );
 835         }
 836         else if( ASF_CmpGUID( &p_sp->i_stream_type,
 837                               &asf_object_stream_type_video ) &&
 838                  p_sp->i_type_specific_data_length >= 11 +
 839                  sizeof( BITMAPINFOHEADER ) )
 840         {
 841             uint8_t      *p_data = &p_sp->p_type_specific_data[11];
 842
 843             es_format_Init( &fmt, VIDEO_ES,
 844                             VLC_FOURCC( p_data[16], p_data[17],
 845                                         p_data[18], p_data[19] ) );
 846             fmt.video.i_width = GetDWLE( p_data + 4 );
 847             fmt.video.i_height= GetDWLE( p_data + 8 );
 848
 849             if( p_esp && p_esp->i_average_time_per_frame > 0 )
 850             {
 851                 fmt.video.i_frame_rate = 10000000;
 852                 fmt.video.i_frame_rate_base = p_esp->i_average_time_per_frame;
 853             }
 854
 855             if( fmt.i_codec == VLC_FOURCC( 'D','V','R',' ') )
 856             {
 857                 /* DVR-MS special ASF */
 858                 fmt.i_codec = VLC_FOURCC( 'm','p','g','2' ) ;
 859                 fmt.b_packetized = false;
 860             }
 861
 862             if( p_sp->i_type_specific_data_length > 11 +
 863                 sizeof( BITMAPINFOHEADER ) )
 864             {
 865                 fmt.i_extra = __MIN( GetDWLE( p_data ),
 866                                      p_sp->i_type_specific_data_length - 11 -
 867                                      sizeof( BITMAPINFOHEADER ) );
 868                 fmt.p_extra = malloc( fmt.i_extra );
 869                 memcpy( fmt.p_extra, &p_data[sizeof( BITMAPINFOHEADER )],
 870                         fmt.i_extra );
 871             }
 872
 873             /* Look for an aspect ratio */
 874             if( p_sys->p_root->p_metadata )
 875             {
 876                 asf_object_metadata_t *p_meta = p_sys->p_root->p_metadata;
 877                 int i_aspect_x = 0, i_aspect_y = 0;
 878                 unsigned int i;
 879
 880                 for( i = 0; i < p_meta->i_record_entries_count; i++ )
 881                 {
 882                     if( !strcmp( p_meta->record[i].psz_name, "AspectRatioX" ) )
 883                     {
 884                         if( (!i_aspect_x && !p_meta->record[i].i_stream) ||
 885                             p_meta->record[i].i_stream ==
 886                             p_sp->i_stream_number )
 887                             i_aspect_x = p_meta->record[i].i_val;
 888                     }
 889                     if( !strcmp( p_meta->record[i].psz_name, "AspectRatioY" ) )
 890                     {
 891                         if( (!i_aspect_y && !p_meta->record[i].i_stream) ||
 892                             p_meta->record[i].i_stream ==
 893                             p_sp->i_stream_number )
 894                             i_aspect_y = p_meta->record[i].i_val;
 895                     }
 896                 }
 897
 898                 if( i_aspect_x && i_aspect_y )
 899                 {
 900                     fmt.video.i_sar_num = i_aspect_x;
 901                     fmt.video.i_sar_den = i_aspect_y;
 902                 }
 903             }
 904
 905             /* If there is a video track then use the index for seeking */
 906             p_sys->b_index = b_index;
 907
 908             msg_Dbg( p_demux, "added new video stream(ID:%d)",
 909                      p_sp->i_stream_number );
 910         }
 911         else if( ASF_CmpGUID( &p_sp->i_stream_type, &asf_object_extended_stream_header ) &&
 912             p_sp->i_type_specific_data_length >= 64 )
 913         {
 914             /* Now follows a 64 byte header of which we don't know much */
 915             guid_t  *p_ref  = (guid_t *)p_sp->p_type_specific_data;
 916             uint8_t *p_data = p_sp->p_type_specific_data + 64;
 917             unsigned int i_data = p_sp->i_type_specific_data_length - 64;
 918
 919             msg_Dbg( p_demux, "Ext stream header detected. datasize = %d", p_sp->i_type_specific_data_length );
 920             if( ASF_CmpGUID( p_ref, &asf_object_extended_stream_type_audio ) &&
 921                 i_data >= sizeof( WAVEFORMATEX ) - 2)
 922             {
 923                 int      i_format;
 924                 es_format_Init( &fmt, AUDIO_ES, 0 );
 925                 i_format = GetWLE( &p_data[0] );
 926                 if( i_format == 0 )
 927                     fmt.i_codec = VLC_CODEC_A52;
 928                 else
 929                     wf_tag_to_fourcc( i_format, &fmt.i_codec, NULL );
 930                 fmt.audio.i_channels        = GetWLE(  &p_data[2] );
 931                 fmt.audio.i_rate      = GetDWLE( &p_data[4] );
 932                 fmt.i_bitrate         = GetDWLE( &p_data[8] ) * 8;
 933                 fmt.audio.i_blockalign      = GetWLE(  &p_data[12] );
 934                 fmt.audio.i_bitspersample   = GetWLE(  &p_data[14] );
 935                 fmt.b_packetized = true;
 936
 937                 if( p_sp->i_type_specific_data_length > sizeof( WAVEFORMATEX ) &&
 938                     i_format != WAVE_FORMAT_MPEGLAYER3 &&
 939                     i_format != WAVE_FORMAT_MPEG )
 940                 {
 941                     fmt.i_extra = __MIN( GetWLE( &p_data[16] ),
 942                                          p_sp->i_type_specific_data_length -
 943                                          sizeof( WAVEFORMATEX ) );
 944                     fmt.p_extra = malloc( fmt.i_extra );
 945                     memcpy( fmt.p_extra, &p_data[sizeof( WAVEFORMATEX )],
 946                         fmt.i_extra );
 947                 }
 948
 949                 msg_Dbg( p_demux, "added new audio stream (codec:0x%x,ID:%d)",
 950                     i_format, p_sp->i_stream_number );
 951             }
 952             else
 953             {
 954                 es_format_Init( &fmt, UNKNOWN_ES, 0 );
 955             }
 956         }
 957         else
 958         {
 959             es_format_Init( &fmt, UNKNOWN_ES, 0 );
 960         }
 961
 962         tk->i_cat = fmt.i_cat;
 963         if( fmt.i_cat != UNKNOWN_ES )
 964         {
 965             if( p_esp && p_languages &&
 966                 p_esp->i_language_index >= 0 &&
 967                 p_esp->i_language_index < p_languages->i_language )
 968             {
 969                 fmt.psz_language = strdup( p_languages->ppsz_language[p_esp->i_language_index] );
 970                 char *p;
 971                 if( fmt.psz_language && (p = strchr( fmt.psz_language, '-' )) )
 972                     *p = '\0';
 973             }
 974
 975             tk->p_es = es_out_Add( p_demux->out, &fmt );
 976         }
 977         else
 978         {
 979             msg_Dbg( p_demux, "ignoring unknown stream(ID:%d)",
 980                      p_sp->i_stream_number );
 981         }
 982         es_format_Clean( &fmt );
 983     }
 984
 985     p_sys->i_data_begin = p_sys->p_root->p_data->i_object_pos + 50;
 986     if( p_sys->p_root->p_data->i_object_size != 0 )
 987     { /* local file */
 988         p_sys->i_data_end = p_sys->p_root->p_data->i_object_pos +
 989                                     p_sys->p_root->p_data->i_object_size;
 990     }
 991     else
 992     { /* live/broacast */
 993         p_sys->i_data_end = -1;
 994     }
 995
 996     /* go to first packet */
 997     stream_Seek( p_demux->s, p_sys->i_data_begin );
 998
 999     /* try to calculate movie time */
1000     if( p_sys->p_fp->i_data_packets_count > 0 )
1001     {
1002         int64_t i_count;
1003         int64_t i_size = stream_Size( p_demux->s );
1004
1005         if( p_sys->i_data_end > 0 && i_size > p_sys->i_data_end )
1006         {
1007             i_size = p_sys->i_data_end;
1008         }
1009
1010         /* real number of packets */
1011         i_count = ( i_size - p_sys->i_data_begin ) /
1012                   p_sys->p_fp->i_min_data_packet_size;
1013
1014         /* calculate the time duration in micro-s */
1015         p_sys->i_length = (mtime_t)p_sys->p_fp->i_play_duration / 10 *
1016                    (mtime_t)i_count /
1017                    (mtime_t)p_sys->p_fp->i_data_packets_count - p_sys->p_fp->i_preroll * 1000;
1018         if( p_sys->i_length < 0 )
1019             p_sys->i_length = 0;
1020
1021         if( p_sys->i_length > 0 )
1022         {
1023             p_sys->i_bitrate = 8 * i_size * (int64_t)1000000 / p_sys->i_length;
1024         }
1025     }
1026
1027     /* Create meta information */
1028     p_sys->meta = vlc_meta_New();
1029
1030     asf_object_content_description_t *p_cd;
1031     if( ( p_cd = ASF_FindObject( p_sys->p_root->p_hdr,
1032                                  &asf_object_content_description_guid, 0 ) ) )
1033     {
1034         if( p_cd->psz_title && *p_cd->psz_title )
1035         {
1036             vlc_meta_SetTitle( p_sys->meta, p_cd->psz_title );
1037         }
1038         if( p_cd->psz_artist && *p_cd->psz_artist )
1039         {
1040              vlc_meta_SetArtist( p_sys->meta, p_cd->psz_artist );
1041         }
1042         if( p_cd->psz_copyright && *p_cd->psz_copyright )
1043         {
1044             vlc_meta_SetCopyright( p_sys->meta, p_cd->psz_copyright );
1045         }
1046         if( p_cd->psz_description && *p_cd->psz_description )
1047         {
1048             vlc_meta_SetDescription( p_sys->meta, p_cd->psz_description );
1049         }
1050         if( p_cd->psz_rating && *p_cd->psz_rating )
1051         {
1052             vlc_meta_SetRating( p_sys->meta, p_cd->psz_rating );
1053         }
1054     }
1055     /// \tood Fix Child meta for ASF tracks
1056 #if 0
1057     for( i_stream = 0, i = 0; i < 128; i++ )
1058     {
1059         asf_object_codec_list_t *p_cl = ASF_FindObject( p_sys->p_root->p_hdr,
1060                                                         &asf_object_codec_list_guid, 0 );
1061
1062         if( p_sys->track[i] )
1063         {
1064             vlc_meta_t *tk = vlc_meta_New();
1065             TAB_APPEND( p_sys->meta->i_track, p_sys->meta->track, tk );
1066
1067             if( p_cl && i_stream < p_cl->i_codec_entries_count )
1068             {
1069                 if( p_cl->codec[i_stream].psz_name &&
1070                     *p_cl->codec[i_stream].psz_name )
1071                 {
1072                     vlc_meta_Add( tk, VLC_META_CODEC_NAME,
1073                                   p_cl->codec[i_stream].psz_name );
1074                 }
1075                 if( p_cl->codec[i_stream].psz_description &&
1076                     *p_cl->codec[i_stream].psz_description )
1077                 {
1078                     vlc_meta_Add( tk, VLC_META_CODEC_DESCRIPTION,
1079                                   p_cl->codec[i_stream].psz_description );
1080                 }
1081             }
1082             i_stream++;
1083         }
1084     }
1085 #endif
1086     return VLC_SUCCESS;
1087
1088 error:
1089     ASF_FreeObjectRoot( p_demux->s, p_sys->p_root );
1090     return VLC_EGENERIC;
1091 }
1092 /*****************************************************************************
1093  *
1094  *****************************************************************************/
1095 static void DemuxEnd( demux_t *p_demux )
1096 {
1097     demux_sys_t *p_sys = p_demux->p_sys;
1098     int         i;
1099
1100     if( p_sys->p_root )
1101     {
1102         ASF_FreeObjectRoot( p_demux->s, p_sys->p_root );
1103         p_sys->p_root = NULL;
1104     }
1105     if( p_sys->meta )
1106     {
1107         vlc_meta_Delete( p_sys->meta );
1108         p_sys->meta = NULL;
1109     }
1110
1111     for( i = 0; i < 128; i++ )
1112     {
1113         asf_track_t *tk = p_sys->track[i];
1114
1115         if( tk )
1116         {
1117             if( tk->p_frame )
1118             {
1119                 block_ChainRelease( tk->p_frame );
1120             }
1121             if( tk->p_es )
1122             {
1123                 es_out_Del( p_demux->out, tk->p_es );
1124             }
1125             free( tk );
1126         }
1127         p_sys->track[i] = 0;
1128     }
1129 }
1130