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