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 SeekIndex( demux_t *p_demux, mtime_t i_date, float f_pos )
 229 {
 230     demux_sys_t *p_sys = p_demux->p_sys;
 231     asf_object_index_t *p_index;
 232     int64_t i_pos;
 233
 234     msg_Dbg( p_demux, "seek with index: %i seconds, position %f",
 235              (int)(i_date/1000000), f_pos );
 236
 237     p_index = ASF_FindObject( p_sys->p_root, &asf_object_index_guid, 0 );
 238
 239     if( i_date < 0 ) i_date = p_sys->i_length * f_pos;
 240
 241     i_pos = i_date * 10 / p_index->i_index_entry_time_interval;
 242     i_pos = p_index->index_entry[i_pos].i_packet_number *
 243         p_sys->p_fp->i_min_data_packet_size;
 244
 245     return stream_Seek( p_demux->s, p_sys->i_data_begin + i_pos );
 246 }
 247
 248 static void SeekPrepare( demux_t *p_demux )
 249 {
 250     demux_sys_t *p_sys = p_demux->p_sys;
 251
 252     p_sys->i_time = -1;
 253     for( int i = 0; i < 128 ; i++ )
 254     {
 255         asf_track_t *tk = p_sys->track[i];
 256         if( !tk )
 257             continue;
 258
 259         tk->i_time = 1;
 260         if( tk->p_frame )
 261             block_ChainRelease( tk->p_frame );
 262         tk->p_frame = NULL;
 263     }
 264 }
 265
 266 /*****************************************************************************
 267  * Control:
 268  *****************************************************************************/
 269 static int Control( demux_t *p_demux, int i_query, va_list args )
 270 {
 271     demux_sys_t *p_sys = p_demux->p_sys;
 272     vlc_meta_t  *p_meta;
 273     int64_t     i64, *pi64;
 274     double      f, *pf;
 275
 276     switch( i_query )
 277     {
 278     case DEMUX_GET_LENGTH:
 279         pi64 = (int64_t*)va_arg( args, int64_t * );
 280         *pi64 = p_sys->i_length;
 281         return VLC_SUCCESS;
 282
 283     case DEMUX_GET_TIME:
 284         pi64 = (int64_t*)va_arg( args, int64_t * );
 285         if( p_sys->i_time < 0 ) return VLC_EGENERIC;
 286         *pi64 = p_sys->i_time;
 287         return VLC_SUCCESS;
 288
 289     case DEMUX_SET_TIME:
 290         SeekPrepare( p_demux );
 291
 292         if( p_sys->b_index && p_sys->i_length > 0 )
 293         {
 294             i64 = (int64_t)va_arg( args, int64_t );
 295             return SeekIndex( p_demux, i64, -1 );
 296         }
 297         else
 298         {
 299             return demux_vaControlHelper( p_demux->s, p_sys->i_data_begin,
 300                                            p_sys->i_data_end, p_sys->i_bitrate,
 301                                            p_sys->p_fp->i_min_data_packet_size,
 302                                            i_query, args );
 303         }
 304
 305     case DEMUX_GET_POSITION:
 306         if( p_sys->i_time < 0 ) return VLC_EGENERIC;
 307         if( p_sys->i_length > 0 )
 308         {
 309             pf = (double*)va_arg( args, double * );
 310             *pf = p_sys->i_time / (double)p_sys->i_length;
 311             return VLC_SUCCESS;
 312         }
 313         return demux_vaControlHelper( p_demux->s, p_sys->i_data_begin,
 314                                        p_sys->i_data_end, p_sys->i_bitrate,
 315                                        p_sys->p_fp->i_min_data_packet_size,
 316                                        i_query, args );
 317
 318     case DEMUX_SET_POSITION:
 319         SeekPrepare( p_demux );
 320
 321         if( p_sys->b_index && p_sys->i_length > 0 )
 322         {
 323             f = (double)va_arg( args, double );
 324             return SeekIndex( p_demux, -1, f );
 325         }
 326         else
 327         {
 328             return demux_vaControlHelper( p_demux->s, p_sys->i_data_begin,
 329                                            p_sys->i_data_end, p_sys->i_bitrate,
 330                                            p_sys->p_fp->i_min_data_packet_size,
 331                                            i_query, args );
 332         }
 333
 334     case DEMUX_GET_META:
 335         p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
 336         vlc_meta_Merge( p_meta, p_sys->meta );
 337         return VLC_SUCCESS;
 338
 339     default:
 340         return demux_vaControlHelper( p_demux->s, p_sys->i_data_begin,
 341                                        p_sys->i_data_end, p_sys->i_bitrate,
 342                                        p_sys->p_fp->i_min_data_packet_size,
 343                                        i_query, args );
 344     }
 345 }
 346
 347 /*****************************************************************************
 348  *
 349  *****************************************************************************/
 350 static mtime_t GetMoviePTS( demux_sys_t *p_sys )
 351 {
 352     mtime_t i_time = -1;
 353     int     i;
 354
 355     for( i = 0; i < 128 ; i++ )
 356     {
 357         asf_track_t *tk = p_sys->track[i];
 358
 359         if( tk && tk->p_es && tk->i_time > 0)
 360         {
 361             if( i_time < 0 ) i_time = tk->i_time;
 362             else i_time = __MIN( i_time, tk->i_time );
 363         }
 364     }
 365
 366     return i_time;
 367 }
 368
 369 #define GETVALUE2b( bits, var, def ) \
 370     switch( (bits)&0x03 ) \
 371     { \
 372         case 1: var = p_peek[i_skip]; i_skip++; break; \
 373         case 2: var = GetWLE( p_peek + i_skip );  i_skip+= 2; break; \
 374         case 3: var = GetDWLE( p_peek + i_skip ); i_skip+= 4; break; \
 375         case 0: \
 376         default: var = def; break;\
 377     }
 378
 379 static int DemuxPacket( demux_t *p_demux )
 380 {
 381     demux_sys_t *p_sys = p_demux->p_sys;
 382     int         i_data_packet_min = p_sys->p_fp->i_min_data_packet_size;
 383     const uint8_t *p_peek;
 384     int         i_skip;
 385
 386     int         i_packet_size_left;
 387     int         i_packet_flags;
 388     int         i_packet_property;
 389
 390     int         b_packet_multiple_payload;
 391     int         i_packet_length;
 392     int         i_packet_sequence;
 393     int         i_packet_padding_length;
 394
 395     uint32_t    i_packet_send_time;
 396     uint16_t    i_packet_duration;
 397     int         i_payload;
 398     int         i_payload_count;
 399     int         i_payload_length_type;
 400
 401
 402     if( stream_Peek( p_demux->s, &p_peek,i_data_packet_min)<i_data_packet_min )
 403     {
 404         msg_Warn( p_demux, "cannot peek while getting new packet, EOF ?" );
 405         return 0;
 406     }
 407     i_skip = 0;
 408
 409     /* *** parse error correction if present *** */
 410     if( p_peek[0]&0x80 )
 411     {
 412         unsigned int i_error_correction_length_type;
 413         unsigned int i_error_correction_data_length;
 414         unsigned int i_opaque_data_present;
 415
 416         i_error_correction_data_length = p_peek[0] & 0x0f;  // 4bits
 417         i_opaque_data_present = ( p_peek[0] >> 4 )& 0x01;    // 1bit
 418         i_error_correction_length_type = ( p_peek[0] >> 5 ) & 0x03; // 2bits
 419         i_skip += 1; // skip error correction flags
 420
 421         if( i_error_correction_length_type != 0x00 ||
 422             i_opaque_data_present != 0 ||
 423             i_error_correction_data_length != 0x02 )
 424         {
 425             goto loop_error_recovery;
 426         }
 427
 428         i_skip += i_error_correction_data_length;
 429     }
 430     else
 431     {
 432         msg_Warn( p_demux, "p_peek[0]&0x80 != 0x80" );
 433     }
 434
 435     /* sanity check */
 436     if( i_skip + 2 >= i_data_packet_min )
 437     {
 438         goto loop_error_recovery;
 439     }
 440
 441     i_packet_flags = p_peek[i_skip]; i_skip++;
 442     i_packet_property = p_peek[i_skip]; i_skip++;
 443
 444     b_packet_multiple_payload = i_packet_flags&0x01;
 445
 446     /* read some value */
 447     GETVALUE2b( i_packet_flags >> 5, i_packet_length, i_data_packet_min );
 448     GETVALUE2b( i_packet_flags >> 1, i_packet_sequence, 0 );
 449     GETVALUE2b( i_packet_flags >> 3, i_packet_padding_length, 0 );
 450
 451     if( i_packet_padding_length > i_packet_length )
 452     {
 453         msg_Warn( p_demux, "Too large padding: %d", i_packet_padding_length );
 454         goto loop_error_recovery;
 455     }
 456
 457     i_packet_send_time = GetDWLE( p_peek + i_skip ); i_skip += 4;
 458     i_packet_duration  = GetWLE( p_peek + i_skip ); i_skip += 2;
 459
 460     /* FIXME I have to do that for some file, I don't known why */
 461     i_packet_size_left = i_data_packet_min /*i_packet_length*/ ;
 462
 463     if( b_packet_multiple_payload )
 464     {
 465         i_payload_count = p_peek[i_skip] & 0x3f;
 466         i_payload_length_type = ( p_peek[i_skip] >> 6 )&0x03;
 467         i_skip++;
 468     }
 469     else
 470     {
 471         i_payload_count = 1;
 472         i_payload_length_type = 0x02; // unused
 473     }
 474
 475     for( i_payload = 0; i_payload < i_payload_count ; i_payload++ )
 476     {
 477         asf_track_t   *tk;
 478
 479         int i_packet_keyframe;
 480         int i_stream_number;
 481         int i_media_object_number;
 482         int i_media_object_offset;
 483         int i_replicated_data_length;
 484         int i_payload_data_length;
 485         int i_payload_data_pos;
 486         int i_sub_payload_data_length;
 487         int i_tmp;
 488
 489         mtime_t i_pts;
 490         mtime_t i_pts_delta;
 491
 492         if( i_skip >= i_packet_size_left )
 493         {
 494             /* prevent some segfault with invalid file */
 495             break;
 496         }
 497
 498         i_packet_keyframe = p_peek[i_skip] >> 7;
 499         i_stream_number = p_peek[i_skip++] & 0x7f;
 500
 501         GETVALUE2b( i_packet_property >> 4, i_media_object_number, 0 );
 502         GETVALUE2b( i_packet_property >> 2, i_tmp, 0 );
 503         GETVALUE2b( i_packet_property, i_replicated_data_length, 0 );
 504
 505         if( i_replicated_data_length > 1 ) // should be at least 8 bytes
 506         {
 507             i_pts = (mtime_t)GetDWLE( p_peek + i_skip + 4 ) * 1000;
 508             i_skip += i_replicated_data_length;
 509             i_pts_delta = 0;
 510
 511             i_media_object_offset = i_tmp;
 512
 513             if( i_skip >= i_packet_size_left )
 514             {
 515                 break;
 516             }
 517         }
 518         else if( i_replicated_data_length == 1 )
 519         {
 520             /* msg_Dbg( p_demux, "found compressed payload" ); */
 521
 522             i_pts = (mtime_t)i_tmp * 1000;
 523             i_pts_delta = (mtime_t)p_peek[i_skip] * 1000; i_skip++;
 524
 525             i_media_object_offset = 0;
 526         }
 527         else
 528         {
 529             i_pts = (mtime_t)i_packet_send_time * 1000;
 530             i_pts_delta = 0;
 531
 532             i_media_object_offset = i_tmp;
 533         }
 534
 535         i_pts = __MAX( i_pts - p_sys->p_fp->i_preroll * 1000, 0 );
 536         if( b_packet_multiple_payload )
 537         {
 538             GETVALUE2b( i_payload_length_type, i_payload_data_length, 0 );
 539         }
 540         else
 541         {
 542             i_payload_data_length = i_packet_length -
 543                                     i_packet_padding_length - i_skip;
 544         }
 545
 546         if( i_payload_data_length < 0 || i_payload_data_length > i_packet_size_left )
 547         {
 548             break;
 549         }
 550 #if 0
 551          msg_Dbg( p_demux,
 552                   "payload(%d/%d) stream_number:%d media_object_number:%d media_object_offset:%d replicated_data_length:%d payload_data_length %d",
 553                   i_payload + 1, i_payload_count, i_stream_number, i_media_object_number,
 554                   i_media_object_offset, i_replicated_data_length, i_payload_data_length );
 555 #endif
 556
 557         if( ( tk = p_sys->track[i_stream_number] ) == NULL )
 558         {
 559             msg_Warn( p_demux,
 560                       "undeclared stream[Id 0x%x]", i_stream_number );
 561             i_skip += i_payload_data_length;
 562             continue;   // over payload
 563         }
 564
 565         if( !tk->p_es )
 566         {
 567             i_skip += i_payload_data_length;
 568             continue;
 569         }
 570
 571
 572         for( i_payload_data_pos = 0;
 573              i_payload_data_pos < i_payload_data_length &&
 574                     i_packet_size_left > 0;
 575              i_payload_data_pos += i_sub_payload_data_length )
 576         {
 577             block_t *p_frag;
 578             int i_read;
 579
 580             // read sub payload length
 581             if( i_replicated_data_length == 1 )
 582             {
 583                 i_sub_payload_data_length = p_peek[i_skip]; i_skip++;
 584                 i_payload_data_pos++;
 585             }
 586             else
 587             {
 588                 i_sub_payload_data_length = i_payload_data_length;
 589             }
 590
 591             /* FIXME I don't use i_media_object_number, sould I ? */
 592             if( tk->p_frame && i_media_object_offset == 0 )
 593             {
 594                 /* send complete packet to decoder */
 595                 block_t *p_gather = block_ChainGather( tk->p_frame );
 596
 597                 if( p_gather->i_dts > VLC_TS_INVALID )
 598                     tk->i_time = p_gather->i_dts - VLC_TS_0;
 599
 600                 if( p_sys->i_time < 0 )
 601                     es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + tk->i_time );
 602
 603                 es_out_Send( p_demux->out, tk->p_es, p_gather );
 604
 605                 tk->p_frame = NULL;
 606             }
 607
 608             i_read = i_sub_payload_data_length + i_skip;
 609             if( ( p_frag = stream_Block( p_demux->s, i_read ) ) == NULL )
 610             {
 611                 msg_Warn( p_demux, "cannot read data" );
 612                 return 0;
 613             }
 614             i_packet_size_left -= i_read;
 615
 616             p_frag->p_buffer += i_skip;
 617             p_frag->i_buffer -= i_skip;
 618
 619             if( tk->p_frame == NULL )
 620             {
 621                 p_frag->i_pts = VLC_TS_0 + i_pts + i_payload * (mtime_t)i_pts_delta;
 622                 if( tk->i_cat != VIDEO_ES )
 623                     p_frag->i_dts = VLC_TS_0 + p_frag->i_pts;
 624                 else
 625                 {
 626                     p_frag->i_dts = VLC_TS_0 + p_frag->i_pts;
 627                     p_frag->i_pts = VLC_TS_INVALID;
 628                 }
 629             }
 630
 631             block_ChainAppend( &tk->p_frame, p_frag );
 632
 633             i_skip = 0;
 634             if( i_packet_size_left > 0 )
 635             {
 636                 if( stream_Peek( p_demux->s, &p_peek, i_packet_size_left )
 637                                                          < i_packet_size_left )
 638                 {
 639                     msg_Warn( p_demux, "cannot peek, EOF ?" );
 640                     return 0;
 641                 }
 642             }
 643         }
 644     }
 645
 646     if( i_packet_size_left > 0 )
 647     {
 648 #ifdef ASF_DEBUG
 649         if( i_packet_size_left > i_packet_padding_length )
 650             msg_Warn( p_demux, "Didn't read %d bytes in the packet",
 651                             i_packet_size_left - i_packet_padding_length );
 652         else if( i_packet_size_left < i_packet_padding_length )
 653             msg_Warn( p_demux, "Read %d too much bytes in the packet",
 654                             i_packet_padding_length - i_packet_size_left );
 655 #endif
 656         if( stream_Read( p_demux->s, NULL, i_packet_size_left )
 657                                                          < i_packet_size_left )
 658         {
 659             msg_Err( p_demux, "cannot skip data, EOF ?" );
 660             return 0;
 661         }
 662     }
 663
 664     return 1;
 665
 666 loop_error_recovery:
 667     msg_Warn( p_demux, "unsupported packet header" );
 668     if( p_sys->p_fp->i_min_data_packet_size != p_sys->p_fp->i_max_data_packet_size )
 669     {
 670         msg_Err( p_demux, "unsupported packet header, fatal error" );
 671         return -1;
 672     }
 673     if( stream_Read( p_demux->s, NULL, i_data_packet_min ) != i_data_packet_min )
 674     {
 675         msg_Warn( p_demux, "cannot skip data, EOF ?" );
 676         return 0;
 677     }
 678
 679     return 1;
 680 }
 681
 682 /*****************************************************************************
 683  *
 684  *****************************************************************************/
 685 static int DemuxInit( demux_t *p_demux )
 686 {
 687     demux_sys_t *p_sys = p_demux->p_sys;
 688
 689     /* init context */
 690     p_sys->i_time   = -1;
 691     p_sys->i_length = 0;
 692     p_sys->i_bitrate = 0;
 693     p_sys->p_root   = NULL;
 694     p_sys->p_fp     = NULL;
 695     p_sys->b_index  = 0;
 696     p_sys->i_track  = 0;
 697     for( int i = 0; i < 128; i++ )
 698     {
 699         p_sys->track[i] = NULL;
 700     }
 701     p_sys->i_data_begin = -1;
 702     p_sys->i_data_end   = -1;
 703     p_sys->meta         = NULL;
 704
 705     /* Now load all object ( except raw data ) */
 706     bool b_seekable;
 707     stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &b_seekable );
 708     if( !(p_sys->p_root = ASF_ReadObjectRoot(p_demux->s, b_seekable)) )
 709     {
 710         msg_Warn( p_demux, "ASF plugin discarded (not a valid file)" );
 711         return VLC_EGENERIC;
 712     }
 713     p_sys->p_fp = p_sys->p_root->p_fp;
 714
 715     if( p_sys->p_fp->i_min_data_packet_size != p_sys->p_fp->i_max_data_packet_size )
 716     {
 717         msg_Warn( p_demux, "ASF plugin discarded (invalid file_properties object)" );
 718         goto error;
 719     }
 720
 721     p_sys->i_track = ASF_CountObject( p_sys->p_root->p_hdr,
 722                                       &asf_object_stream_properties_guid );
 723     if( p_sys->i_track <= 0 )
 724     {
 725         msg_Warn( p_demux, "ASF plugin discarded (cannot find any stream!)" );
 726         goto error;
 727     }
 728     msg_Dbg( p_demux, "found %d streams", p_sys->i_track );
 729
 730     /* check if index is available */
 731     asf_object_index_t *p_index = ASF_FindObject( p_sys->p_root,
 732                                                   &asf_object_index_guid, 0 );
 733     const bool b_index = p_index && p_index->i_index_entry_count;
 734
 735     /* Find the extended header if any */
 736     asf_object_t *p_hdr_ext = ASF_FindObject( p_sys->p_root->p_hdr,
 737                                               &asf_object_header_extension_guid, 0 );
 738
 739     for( unsigned i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
 740     {
 741         asf_track_t    *tk;
 742         asf_object_stream_properties_t *p_sp;
 743         asf_object_extended_stream_properties_t *p_esp;
 744         bool b_access_selected;
 745
 746         p_sp = ASF_FindObject( p_sys->p_root->p_hdr,
 747                                &asf_object_stream_properties_guid,
 748                                i_stream );
 749         p_esp = NULL;
 750
 751         tk = p_sys->track[p_sp->i_stream_number] = malloc( sizeof( asf_track_t ) );
 752         memset( tk, 0, sizeof( asf_track_t ) );
 753
 754         tk->i_time = -1;
 755         tk->p_sp = p_sp;
 756         tk->p_es = NULL;
 757         tk->p_frame = NULL;
 758
 759         /* Check (in case of mms) if this track is selected (ie will receive data) */
 760         if( !stream_Control( p_demux->s, STREAM_CONTROL_ACCESS, ACCESS_GET_PRIVATE_ID_STATE,
 761                              p_sp->i_stream_number, &b_access_selected ) &&
 762             !b_access_selected )
 763         {
 764             tk->i_cat = UNKNOWN_ES;
 765             msg_Dbg( p_demux, "ignoring not selected stream(ID:%d) (by access)",
 766                      p_sp->i_stream_number );
 767             continue;
 768         }
 769
 770         /* Find the associated extended_stream_properties if any */
 771         if( p_hdr_ext )
 772         {
 773             int i_ext_stream = ASF_CountObject( p_hdr_ext,
 774                                                 &asf_object_extended_stream_properties );
 775             for( int i = 0; i < i_ext_stream; i++ )
 776             {
 777                 asf_object_t *p_tmp =
 778                     ASF_FindObject( p_hdr_ext,
 779                                     &asf_object_extended_stream_properties, i );
 780                 if( p_tmp->ext_stream.i_stream_number == p_sp->i_stream_number )
 781                 {
 782                     p_esp = &p_tmp->ext_stream;
 783                     break;
 784                 }
 785             }
 786         }
 787
 788         es_format_t fmt;
 789
 790         if( ASF_CmpGUID( &p_sp->i_stream_type, &asf_object_stream_type_audio ) &&
 791             p_sp->i_type_specific_data_length >= sizeof( WAVEFORMATEX ) - 2 )
 792         {
 793             uint8_t *p_data = p_sp->p_type_specific_data;
 794             int i_format;
 795
 796             es_format_Init( &fmt, AUDIO_ES, 0 );
 797             i_format = GetWLE( &p_data[0] );
 798             wf_tag_to_fourcc( i_format, &fmt.i_codec, NULL );
 799             fmt.audio.i_channels        = GetWLE(  &p_data[2] );
 800             fmt.audio.i_rate      = GetDWLE( &p_data[4] );
 801             fmt.i_bitrate         = GetDWLE( &p_data[8] ) * 8;
 802             fmt.audio.i_blockalign      = GetWLE(  &p_data[12] );
 803             fmt.audio.i_bitspersample   = GetWLE(  &p_data[14] );
 804
 805             if( p_sp->i_type_specific_data_length > sizeof( WAVEFORMATEX ) &&
 806                 i_format != WAVE_FORMAT_MPEGLAYER3 &&
 807                 i_format != WAVE_FORMAT_MPEG )
 808             {
 809                 fmt.i_extra = __MIN( GetWLE( &p_data[16] ),
 810                                      p_sp->i_type_specific_data_length -
 811                                      sizeof( WAVEFORMATEX ) );
 812                 fmt.p_extra = malloc( fmt.i_extra );
 813                 memcpy( fmt.p_extra, &p_data[sizeof( WAVEFORMATEX )],
 814                         fmt.i_extra );
 815             }
 816
 817             msg_Dbg( p_demux, "added new audio stream(codec:0x%x,ID:%d)",
 818                     GetWLE( p_data ), p_sp->i_stream_number );
 819         }
 820         else if( ASF_CmpGUID( &p_sp->i_stream_type,
 821                               &asf_object_stream_type_video ) &&
 822                  p_sp->i_type_specific_data_length >= 11 +
 823                  sizeof( BITMAPINFOHEADER ) )
 824         {
 825             uint8_t      *p_data = &p_sp->p_type_specific_data[11];
 826
 827             es_format_Init( &fmt, VIDEO_ES,
 828                             VLC_FOURCC( p_data[16], p_data[17],
 829                                         p_data[18], p_data[19] ) );
 830             fmt.video.i_width = GetDWLE( p_data + 4 );
 831             fmt.video.i_height= GetDWLE( p_data + 8 );
 832
 833             if( p_esp && p_esp->i_average_time_per_frame > 0 )
 834             {
 835                 fmt.video.i_frame_rate = 10000000;
 836                 fmt.video.i_frame_rate_base = p_esp->i_average_time_per_frame;
 837             }
 838
 839             if( fmt.i_codec == VLC_FOURCC( 'D','V','R',' ') )
 840             {
 841                 /* DVR-MS special ASF */
 842                 fmt.i_codec = VLC_FOURCC( 'm','p','g','2' ) ;
 843                 fmt.b_packetized = false;
 844             }
 845
 846             if( p_sp->i_type_specific_data_length > 11 +
 847                 sizeof( BITMAPINFOHEADER ) )
 848             {
 849                 fmt.i_extra = __MIN( GetDWLE( p_data ),
 850                                      p_sp->i_type_specific_data_length - 11 -
 851                                      sizeof( BITMAPINFOHEADER ) );
 852                 fmt.p_extra = malloc( fmt.i_extra );
 853                 memcpy( fmt.p_extra, &p_data[sizeof( BITMAPINFOHEADER )],
 854                         fmt.i_extra );
 855             }
 856
 857             /* Look for an aspect ratio */
 858             if( p_sys->p_root->p_metadata )
 859             {
 860                 asf_object_metadata_t *p_meta = p_sys->p_root->p_metadata;
 861                 int i_aspect_x = 0, i_aspect_y = 0;
 862                 unsigned int i;
 863
 864                 for( i = 0; i < p_meta->i_record_entries_count; i++ )
 865                 {
 866                     if( !strcmp( p_meta->record[i].psz_name, "AspectRatioX" ) )
 867                     {
 868                         if( (!i_aspect_x && !p_meta->record[i].i_stream) ||
 869                             p_meta->record[i].i_stream ==
 870                             p_sp->i_stream_number )
 871                             i_aspect_x = p_meta->record[i].i_val;
 872                     }
 873                     if( !strcmp( p_meta->record[i].psz_name, "AspectRatioY" ) )
 874                     {
 875                         if( (!i_aspect_y && !p_meta->record[i].i_stream) ||
 876                             p_meta->record[i].i_stream ==
 877                             p_sp->i_stream_number )
 878                             i_aspect_y = p_meta->record[i].i_val;
 879                     }
 880                 }
 881
 882                 if( i_aspect_x && i_aspect_y )
 883                 {
 884                     fmt.video.i_sar_num = i_aspect_x;
 885                     fmt.video.i_sar_den = i_aspect_y;
 886                 }
 887             }
 888
 889             /* If there is a video track then use the index for seeking */
 890             p_sys->b_index = b_index;
 891
 892             msg_Dbg( p_demux, "added new video stream(ID:%d)",
 893                      p_sp->i_stream_number );
 894         }
 895         else if( ASF_CmpGUID( &p_sp->i_stream_type, &asf_object_extended_stream_header ) &&
 896             p_sp->i_type_specific_data_length >= 64 )
 897         {
 898             /* Now follows a 64 byte header of which we don't know much */
 899             guid_t  *p_ref  = (guid_t *)p_sp->p_type_specific_data;
 900             uint8_t *p_data = p_sp->p_type_specific_data + 64;
 901             unsigned int i_data = p_sp->i_type_specific_data_length - 64;
 902
 903             msg_Dbg( p_demux, "Ext stream header detected. datasize = %d", p_sp->i_type_specific_data_length );
 904             if( ASF_CmpGUID( p_ref, &asf_object_extended_stream_type_audio ) &&
 905                 i_data >= sizeof( WAVEFORMATEX ) - 2)
 906             {
 907                 int      i_format;
 908                 es_format_Init( &fmt, AUDIO_ES, 0 );
 909                 i_format = GetWLE( &p_data[0] );
 910                 if( i_format == 0 )
 911                     fmt.i_codec = VLC_CODEC_A52;
 912                 else
 913                     wf_tag_to_fourcc( i_format, &fmt.i_codec, NULL );
 914                 fmt.audio.i_channels        = GetWLE(  &p_data[2] );
 915                 fmt.audio.i_rate      = GetDWLE( &p_data[4] );
 916                 fmt.i_bitrate         = GetDWLE( &p_data[8] ) * 8;
 917                 fmt.audio.i_blockalign      = GetWLE(  &p_data[12] );
 918                 fmt.audio.i_bitspersample   = GetWLE(  &p_data[14] );
 919                 fmt.b_packetized = true;
 920
 921                 if( p_sp->i_type_specific_data_length > sizeof( WAVEFORMATEX ) &&
 922                     i_format != WAVE_FORMAT_MPEGLAYER3 &&
 923                     i_format != WAVE_FORMAT_MPEG )
 924                 {
 925                     fmt.i_extra = __MIN( GetWLE( &p_data[16] ),
 926                                          p_sp->i_type_specific_data_length -
 927                                          sizeof( WAVEFORMATEX ) );
 928                     fmt.p_extra = malloc( fmt.i_extra );
 929                     memcpy( fmt.p_extra, &p_data[sizeof( WAVEFORMATEX )],
 930                         fmt.i_extra );
 931                 }
 932
 933                 msg_Dbg( p_demux, "added new audio stream (codec:0x%x,ID:%d)",
 934                     i_format, p_sp->i_stream_number );
 935             }
 936             else
 937             {
 938                 es_format_Init( &fmt, UNKNOWN_ES, 0 );
 939             }
 940         }
 941         else
 942         {
 943             es_format_Init( &fmt, UNKNOWN_ES, 0 );
 944         }
 945
 946         tk->i_cat = fmt.i_cat;
 947         if( fmt.i_cat != UNKNOWN_ES )
 948         {
 949             tk->p_es = es_out_Add( p_demux->out, &fmt );
 950         }
 951         else
 952         {
 953             msg_Dbg( p_demux, "ignoring unknown stream(ID:%d)",
 954                      p_sp->i_stream_number );
 955         }
 956         es_format_Clean( &fmt );
 957     }
 958
 959     p_sys->i_data_begin = p_sys->p_root->p_data->i_object_pos + 50;
 960     if( p_sys->p_root->p_data->i_object_size != 0 )
 961     { /* local file */
 962         p_sys->i_data_end = p_sys->p_root->p_data->i_object_pos +
 963                                     p_sys->p_root->p_data->i_object_size;
 964     }
 965     else
 966     { /* live/broacast */
 967         p_sys->i_data_end = -1;
 968     }
 969
 970     /* go to first packet */
 971     stream_Seek( p_demux->s, p_sys->i_data_begin );
 972
 973     /* try to calculate movie time */
 974     if( p_sys->p_fp->i_data_packets_count > 0 )
 975     {
 976         int64_t i_count;
 977         int64_t i_size = stream_Size( p_demux->s );
 978
 979         if( p_sys->i_data_end > 0 && i_size > p_sys->i_data_end )
 980         {
 981             i_size = p_sys->i_data_end;
 982         }
 983
 984         /* real number of packets */
 985         i_count = ( i_size - p_sys->i_data_begin ) /
 986                   p_sys->p_fp->i_min_data_packet_size;
 987
 988         /* calculate the time duration in micro-s */
 989         p_sys->i_length = (mtime_t)p_sys->p_fp->i_play_duration / 10 *
 990                    (mtime_t)i_count /
 991                    (mtime_t)p_sys->p_fp->i_data_packets_count;
 992
 993         if( p_sys->i_length > 0 )
 994         {
 995             p_sys->i_bitrate = 8 * i_size * (int64_t)1000000 / p_sys->i_length;
 996         }
 997     }
 998
 999     /* Create meta information */
1000     p_sys->meta = vlc_meta_New();
1001
1002     asf_object_content_description_t *p_cd;
1003     if( ( p_cd = ASF_FindObject( p_sys->p_root->p_hdr,
1004                                  &asf_object_content_description_guid, 0 ) ) )
1005     {
1006         if( p_cd->psz_title && *p_cd->psz_title )
1007         {
1008             vlc_meta_SetTitle( p_sys->meta, p_cd->psz_title );
1009         }
1010         if( p_cd->psz_artist && *p_cd->psz_artist )
1011         {
1012              vlc_meta_SetArtist( p_sys->meta, p_cd->psz_artist );
1013         }
1014         if( p_cd->psz_copyright && *p_cd->psz_copyright )
1015         {
1016             vlc_meta_SetCopyright( p_sys->meta, p_cd->psz_copyright );
1017         }
1018         if( p_cd->psz_description && *p_cd->psz_description )
1019         {
1020             vlc_meta_SetDescription( p_sys->meta, p_cd->psz_description );
1021         }
1022         if( p_cd->psz_rating && *p_cd->psz_rating )
1023         {
1024             vlc_meta_SetRating( p_sys->meta, p_cd->psz_rating );
1025         }
1026     }
1027     /// \tood Fix Child meta for ASF tracks
1028 #if 0
1029     for( i_stream = 0, i = 0; i < 128; i++ )
1030     {
1031         asf_object_codec_list_t *p_cl = ASF_FindObject( p_sys->p_root->p_hdr,
1032                                                         &asf_object_codec_list_guid, 0 );
1033
1034         if( p_sys->track[i] )
1035         {
1036             vlc_meta_t *tk = vlc_meta_New();
1037             TAB_APPEND( p_sys->meta->i_track, p_sys->meta->track, tk );
1038
1039             if( p_cl && i_stream < p_cl->i_codec_entries_count )
1040             {
1041                 if( p_cl->codec[i_stream].psz_name &&
1042                     *p_cl->codec[i_stream].psz_name )
1043                 {
1044                     vlc_meta_Add( tk, VLC_META_CODEC_NAME,
1045                                   p_cl->codec[i_stream].psz_name );
1046                 }
1047                 if( p_cl->codec[i_stream].psz_description &&
1048                     *p_cl->codec[i_stream].psz_description )
1049                 {
1050                     vlc_meta_Add( tk, VLC_META_CODEC_DESCRIPTION,
1051                                   p_cl->codec[i_stream].psz_description );
1052                 }
1053             }
1054             i_stream++;
1055         }
1056     }
1057 #endif
1058     return VLC_SUCCESS;
1059
1060 error:
1061     ASF_FreeObjectRoot( p_demux->s, p_sys->p_root );
1062     return VLC_EGENERIC;
1063 }
1064 /*****************************************************************************
1065  *
1066  *****************************************************************************/
1067 static void DemuxEnd( demux_t *p_demux )
1068 {
1069     demux_sys_t *p_sys = p_demux->p_sys;
1070     int         i;
1071
1072     if( p_sys->p_root )
1073     {
1074         ASF_FreeObjectRoot( p_demux->s, p_sys->p_root );
1075         p_sys->p_root = NULL;
1076     }
1077     if( p_sys->meta )
1078     {
1079         vlc_meta_Delete( p_sys->meta );
1080         p_sys->meta = NULL;
1081     }
1082
1083     for( i = 0; i < 128; i++ )
1084     {
1085         asf_track_t *tk = p_sys->track[i];
1086
1087         if( tk )
1088         {
1089             if( tk->p_frame )
1090             {
1091                 block_ChainRelease( tk->p_frame );
1092             }
1093             if( tk->p_es )
1094             {
1095                 es_out_Del( p_demux->out, tk->p_es );
1096             }
1097             free( tk );
1098         }
1099         p_sys->track[i] = 0;
1100     }
1101 }
1102