1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001 VideoLAN
5 * $Id: libasf.c,v 1.8 2002/12/06 16:34:06 sam Exp $
6 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
21 *****************************************************************************/
23 #include <stdlib.h> /* malloc(), free() */
24 #include <string.h> /* strdup() */
26 #include <sys/types.h>
29 #include <vlc/input.h>
36 if( p ) {free( p ); p = NULL; }
38 #define GUID_FMT "0x%x-0x%x-0x%x-0x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x"
39 #define GUID_PRINT( guid ) \
43 (guid).v4[0],(guid).v4[1],(guid).v4[2],(guid).v4[3], \
44 (guid).v4[4],(guid).v4[5],(guid).v4[6],(guid).v4[7]
46 /* Some functions to manipulate memory */
47 static uint16_t GetWLE( uint8_t *p_buff )
49 return( (p_buff[0]) + ( p_buff[1] <<8 ) );
52 static uint32_t GetDWLE( uint8_t *p_buff )
54 return( p_buff[0] + ( p_buff[1] <<8 ) +
55 ( p_buff[2] <<16 ) + ( p_buff[3] <<24 ) );
58 static uint64_t GetQWLE( uint8_t *p_buff )
60 return( ( (uint64_t)GetDWLE( p_buff ) )|
61 ( (uint64_t)GetDWLE( p_buff + 4 ) << 32) );
64 void GetGUID( guid_t *p_guid, uint8_t *p_data )
66 p_guid->v1 = GetDWLE( p_data );
67 p_guid->v2 = GetWLE( p_data + 4);
68 p_guid->v3 = GetWLE( p_data + 6);
69 memcpy( p_guid->v4, p_data + 8, 8 );
72 int CmpGUID( const guid_t *p_guid1, const guid_t *p_guid2 )
74 if( (p_guid1->v1 != p_guid2->v1 )||(p_guid1->v2 != p_guid2->v2 )||
75 (p_guid1->v3 != p_guid2->v3 )||
76 ( memcmp( p_guid1->v4, p_guid2->v4,8 )) )
82 return( 1 ); /* match */
85 /*****************************************************************************
86 * Some basic functions to manipulate stream more easily in vlc
88 * ASF_TellAbsolute get file position
90 * ASF_SeekAbsolute seek in the file
92 * ASF_ReadData read data from the file in a buffer
94 *****************************************************************************/
95 off_t ASF_TellAbsolute( input_thread_t *p_input )
99 vlc_mutex_lock( &p_input->stream.stream_lock );
101 i_pos= p_input->stream.p_selected_area->i_tell;
102 // - ( p_input->p_last_data - p_input->p_current_data );
104 vlc_mutex_unlock( &p_input->stream.stream_lock );
109 int ASF_SeekAbsolute( input_thread_t *p_input,
114 i_filepos = ASF_TellAbsolute( p_input );
115 if( i_pos == i_filepos )
120 if( !p_input->stream.b_seekable && i_pos < i_filepos )
122 msg_Err( p_input, "cannot seek" );
126 if( p_input->stream.b_seekable &&
127 ( p_input->stream.i_method == INPUT_METHOD_FILE ||
129 i_pos - i_filepos > 10000 ) )
131 p_input->pf_seek( p_input, i_pos );
132 input_AccessReinit( p_input );
135 else if( i_pos > i_filepos )
137 uint64_t i_size = i_pos - i_filepos;
140 data_packet_t *p_data;
144 input_SplitBuffer(p_input, &p_data, __MIN( i_size, 1024 ) );
149 input_DeletePacket( p_input->p_method_data, p_data );
152 } while( i_size > 0 );
157 /* return 1 if success, 0 if fail */
158 int ASF_ReadData( input_thread_t *p_input, uint8_t *p_buff, int i_size )
160 data_packet_t *p_data;
172 i_read = input_SplitBuffer(p_input, &p_data, __MIN( i_size, 1024 ) );
177 memcpy( p_buff, p_data->p_payload_start, i_read );
178 input_DeletePacket( p_input->p_method_data, p_data );
188 int ASF_SkipBytes( input_thread_t *p_input, int i_count )
190 return( ASF_SeekAbsolute( p_input,
191 ASF_TellAbsolute( p_input ) + i_count ) );
194 /****************************************************************************/
195 int ASF_ReadObjectCommon( input_thread_t *p_input,
196 asf_object_t *p_obj )
198 asf_object_common_t *p_common = (asf_object_common_t*)p_obj;
201 if( input_Peek( p_input, &p_peek, 24 ) < 24 )
205 GetGUID( &p_common->i_object_id, p_peek );
206 p_common->i_object_size = GetQWLE( p_peek + 16 );
207 p_common->i_object_pos = ASF_TellAbsolute( p_input );
208 p_common->p_next = NULL;
211 "Found Object guid: " GUID_FMT " size:"I64Fd,
212 GUID_PRINT( p_common->i_object_id ),
213 p_common->i_object_size );
219 int ASF_NextObject( input_thread_t *p_input,
220 asf_object_t *p_obj )
225 if( !ASF_ReadObjectCommon( p_input, &obj ) )
232 if( !p_obj->common.i_object_size )
234 return( 0 ); /* failed */
236 if( p_obj->common.p_father && p_obj->common.p_father->common.i_object_size != 0 )
238 if( p_obj->common.p_father->common.i_object_pos + p_obj->common.p_father->common.i_object_size <
239 p_obj->common.i_object_pos + p_obj->common.i_object_size + 24 )
240 /* 24 is min size of an object */
246 return( ASF_SeekAbsolute( p_input,
247 p_obj->common.i_object_pos + p_obj->common.i_object_size ) );
250 int ASF_GotoObject( input_thread_t *p_input,
251 asf_object_t *p_obj )
257 return( ASF_SeekAbsolute( p_input, p_obj->common.i_object_pos ) );
261 void ASF_FreeObject_Null( input_thread_t *p_input,
262 asf_object_t *pp_obj )
268 int ASF_ReadObject_Header( input_thread_t *p_input,
269 asf_object_t *p_obj )
271 asf_object_header_t *p_hdr = (asf_object_header_t*)p_obj;
272 asf_object_t *p_subobj;
276 if( ( i_peek = input_Peek( p_input, &p_peek, 30 ) ) < 30 )
280 p_hdr->i_sub_object_count = GetDWLE( p_peek + 24 );
281 p_hdr->i_reserved1 = p_peek[28];
282 p_hdr->i_reserved2 = p_peek[29];
283 p_hdr->p_first = NULL;
284 p_hdr->p_last = NULL;
287 "Read \"Header Object\" subobj:%d, reserved1:%d, reserved2:%d",
288 p_hdr->i_sub_object_count,
290 p_hdr->i_reserved2 );
292 ASF_SkipBytes( p_input, 30 );
293 /* Now load sub object */
296 p_subobj = malloc( sizeof( asf_object_t ) );
298 if( !( ASF_ReadObject( p_input, p_subobj, (asf_object_t*)p_hdr ) ) )
302 if( !ASF_NextObject( p_input, p_subobj ) ) /* Go to the next object */
310 int ASF_ReadObject_Data( input_thread_t *p_input,
311 asf_object_t *p_obj )
313 asf_object_data_t *p_data = (asf_object_data_t*)p_obj;
317 if( ( i_peek = input_Peek( p_input, &p_peek, 50 ) ) < 50 )
321 GetGUID( &p_data->i_file_id, p_peek + 24 );
322 p_data->i_total_data_packets = GetQWLE( p_peek + 40 );
323 p_data->i_reserved = GetWLE( p_peek + 48 );
326 "Read \"Data Object\" file_id:" GUID_FMT " total data packet:"
328 GUID_PRINT( p_data->i_file_id ),
329 p_data->i_total_data_packets,
330 p_data->i_reserved );
335 int ASF_ReadObject_Index( input_thread_t *p_input,
336 asf_object_t *p_obj )
338 asf_object_index_t *p_index = (asf_object_index_t*)p_obj;
342 if( ( i_peek = input_Peek( p_input, &p_peek, 56 ) ) < 56 )
346 GetGUID( &p_index->i_file_id, p_peek + 24 );
347 p_index->i_index_entry_time_interval = GetQWLE( p_peek + 40 );
348 p_index->i_max_packet_count = GetDWLE( p_peek + 48 );
349 p_index->i_index_entry_count = GetDWLE( p_peek + 52 );
350 p_index->index_entry = NULL; /* FIXME */
354 "Read \"Index Object\" file_id:" GUID_FMT
355 " index_entry_time_interval:"I64Fd" max_packet_count:%d "
356 "index_entry_count:%d",
357 GUID_PRINT( p_index->i_file_id ),
358 p_index->i_max_packet_count,
359 p_index->i_index_entry_count );
363 void ASF_FreeObject_Index( input_thread_t *p_input,
364 asf_object_t *p_obj )
366 asf_object_index_t *p_index = (asf_object_index_t*)p_obj;
368 FREE( p_index->index_entry );
371 int ASF_ReadObject_file_properties( input_thread_t *p_input,
372 asf_object_t *p_obj )
374 asf_object_file_properties_t *p_fp = (asf_object_file_properties_t*)p_obj;
378 if( ( i_peek = input_Peek( p_input, &p_peek, 92) ) < 92 )
382 GetGUID( &p_fp->i_file_id, p_peek + 24 );
383 p_fp->i_file_size = GetQWLE( p_peek + 40 );
384 p_fp->i_creation_date = GetQWLE( p_peek + 48 );
385 p_fp->i_data_packets_count = GetQWLE( p_peek + 56 );
386 p_fp->i_play_duration = GetQWLE( p_peek + 64 );
387 p_fp->i_send_duration = GetQWLE( p_peek + 72 );
388 p_fp->i_preroll = GetQWLE( p_peek + 80 );
389 p_fp->i_flags = GetDWLE( p_peek + 88 );
390 p_fp->i_min_data_packet_size = GetDWLE( p_peek + 92 );
391 p_fp->i_max_data_packet_size = GetDWLE( p_peek + 96 );
392 p_fp->i_max_bitrate = GetDWLE( p_peek + 100 );
396 "Read \"File Properties Object\" file_id:" GUID_FMT
397 " file_size:"I64Fd" creation_date:"I64Fd" data_packets_count:"
398 I64Fd" play_duration:"I64Fd" send_duration:"I64Fd" preroll:"
399 I64Fd" flags:%d min_data_packet_size:%d max_data_packet_size:%d "
401 GUID_PRINT( p_fp->i_file_id ),
403 p_fp->i_creation_date,
404 p_fp->i_data_packets_count,
405 p_fp->i_play_duration,
406 p_fp->i_send_duration,
409 p_fp->i_min_data_packet_size,
410 p_fp->i_max_data_packet_size,
411 p_fp->i_max_bitrate );
416 int ASF_ReadObject_header_extention( input_thread_t *p_input,
417 asf_object_t *p_obj )
419 asf_object_header_extention_t *p_he = (asf_object_header_extention_t*)p_obj;
423 if( ( i_peek = input_Peek( p_input, &p_peek, p_he->i_object_size ) ) < 46)
427 GetGUID( &p_he->i_reserved1, p_peek + 24 );
428 p_he->i_reserved2 = GetWLE( p_peek + 40 );
429 p_he->i_header_extention_size = GetDWLE( p_peek + 42 );
430 if( p_he->i_header_extention_size )
432 p_he->p_header_extention_data = malloc( p_he->i_header_extention_size );
433 memcpy( p_he->p_header_extention_data,
435 p_he->i_header_extention_size );
439 p_he->p_header_extention_data = NULL;
443 "Read \"Header Extention Object\" reserved1:" GUID_FMT " reserved2:%d header_extention_size:%d",
444 GUID_PRINT( p_he->i_reserved1 ),
446 p_he->i_header_extention_size );
450 void ASF_FreeObject_header_extention( input_thread_t *p_input,
451 asf_object_t *p_obj )
453 asf_object_header_extention_t *p_he = (asf_object_header_extention_t*)p_obj;
455 FREE( p_he->p_header_extention_data );
458 int ASF_ReadObject_stream_properties( input_thread_t *p_input,
459 asf_object_t *p_obj )
461 asf_object_stream_properties_t *p_sp =
462 (asf_object_stream_properties_t*)p_obj;
466 if( ( i_peek = input_Peek( p_input, &p_peek, p_sp->i_object_size ) ) < 74 )
470 GetGUID( &p_sp->i_stream_type, p_peek + 24 );
471 GetGUID( &p_sp->i_error_correction_type, p_peek + 40 );
472 p_sp->i_time_offset = GetQWLE( p_peek + 56 );
473 p_sp->i_type_specific_data_length = GetDWLE( p_peek + 64 );
474 p_sp->i_error_correction_data_length = GetDWLE( p_peek + 68 );
475 p_sp->i_flags = GetWLE( p_peek + 72 );
476 p_sp->i_stream_number = p_sp->i_flags&0x07f;
477 p_sp->i_reserved = GetDWLE( p_peek + 74 );
478 if( p_sp->i_type_specific_data_length )
480 p_sp->p_type_specific_data = malloc( p_sp->i_type_specific_data_length );
481 memcpy( p_sp->p_type_specific_data,
483 p_sp->i_type_specific_data_length );
487 p_sp->p_type_specific_data = NULL;
489 if( p_sp->i_error_correction_data_length )
491 p_sp->p_error_correction_data = malloc( p_sp->i_error_correction_data_length );
492 memcpy( p_sp->p_error_correction_data,
493 p_peek + 78 + p_sp->i_type_specific_data_length,
494 p_sp->i_error_correction_data_length );
498 p_sp->p_error_correction_data = NULL;
503 "Read \"Stream Properties Object\" stream_type:" GUID_FMT
504 " error_correction_type:" GUID_FMT " time_offset:"I64Fd
505 " type_specific_data_length:%d error_correction_data_length:%d"
506 " flags:0x%x stream_number:%d",
507 GUID_PRINT( p_sp->i_stream_type ),
508 GUID_PRINT( p_sp->i_error_correction_type ),
510 p_sp->i_type_specific_data_length,
511 p_sp->i_error_correction_data_length,
513 p_sp->i_stream_number );
519 void ASF_FreeObject_stream_properties( input_thread_t *p_input,
520 asf_object_t *p_obj )
522 asf_object_stream_properties_t *p_sp =
523 (asf_object_stream_properties_t*)p_obj;
525 FREE( p_sp->p_type_specific_data );
526 FREE( p_sp->p_error_correction_data );
530 int ASF_ReadObject_codec_list( input_thread_t *p_input,
531 asf_object_t *p_obj )
533 asf_object_codec_list_t *p_cl = (asf_object_codec_list_t*)p_obj;
535 uint8_t *p_peek, *p_data;
537 unsigned int i_codec;
539 if( ( i_peek = input_Peek( p_input, &p_peek, p_cl->i_object_size ) ) < 44 )
544 GetGUID( &p_cl->i_reserved, p_peek + 24 );
545 p_cl->i_codec_entries_count = GetWLE( p_peek + 40 );
546 if( p_cl->i_codec_entries_count > 0 )
549 p_cl->codec = calloc( p_cl->i_codec_entries_count, sizeof( asf_codec_entry_t ) );
550 memset( p_cl->codec, 0, p_cl->i_codec_entries_count * sizeof( asf_codec_entry_t ) );
552 p_data = p_peek + 44;
553 for( i_codec = 0; i_codec < p_cl->i_codec_entries_count; i_codec++ )
555 #define codec p_cl->codec[i_codec]
558 codec.i_type = GetWLE( p_data ); p_data += 2;
560 i_len = GetWLE( p_data ); p_data += 2;
561 codec.psz_name = calloc( sizeof( char ), i_len + 1);
562 for( i = 0; i < i_len; i++ )
564 codec.psz_name[i] = GetWLE( p_data + 2*i );
566 codec.psz_name[i_len] = '\0';
570 i_len = GetWLE( p_data ); p_data += 2;
571 codec.psz_description = calloc( sizeof( char ), i_len + 1);
572 for( i = 0; i < i_len; i++ )
574 codec.psz_description[i] = GetWLE( p_data + 2*i );
576 codec.psz_description[i_len] = '\0';
579 /* opaque information */
580 codec.i_information_length = GetWLE( p_data ); p_data += 2;
581 if( codec.i_information_length > 0 )
583 codec.p_information = malloc( codec.i_information_length );
584 memcpy( codec.p_information, p_data, codec.i_information_length );
585 p_data += codec.i_information_length;
589 codec.p_information = NULL;
602 "Read \"Codec List Object\" reserved_guid:" GUID_FMT " codec_entries_count:%d",
603 GUID_PRINT( p_cl->i_reserved ),
604 p_cl->i_codec_entries_count );
605 for( i_codec = 0; i_codec < p_cl->i_codec_entries_count; i_codec++ )
607 #define codec p_cl->codec[i_codec]
609 "Read \"Codec List Object\" codec[%d] %s name:\"%s\" description:\"%s\" information_length:%d",
611 ( codec.i_type == ASF_CODEC_TYPE_VIDEO ) ? "video" : ( ( codec.i_type == ASF_CODEC_TYPE_AUDIO ) ? "audio" : "unknown" ),
613 codec.psz_description,
614 codec.i_information_length );
621 void ASF_FreeObject_codec_list( input_thread_t *p_input,
622 asf_object_t *p_obj )
624 asf_object_codec_list_t *p_cl = (asf_object_codec_list_t*)p_obj;
625 unsigned int i_codec;
627 for( i_codec = 0; i_codec < p_cl->i_codec_entries_count; i_codec++ )
629 #define codec p_cl->codec[i_codec]
630 FREE( codec.psz_name );
631 FREE( codec.psz_description );
632 FREE( codec.p_information );
639 /* Microsoft should qo to hell. This time the length give number of bytes
640 * and for the some others object, length give char16 count ... */
641 int ASF_ReadObject_content_description( input_thread_t *p_input,
642 asf_object_t *p_obj )
644 asf_object_content_description_t *p_cd =
645 (asf_object_content_description_t*)p_obj;
647 uint8_t *p_peek, *p_data;
656 #define GETSTRINGW( psz_str, i_size ) \
657 psz_str = calloc( i_size/2 + 1, sizeof( char ) ); \
658 for( i_len = 0; i_len < i_size/2; i_len++ ) \
660 psz_str[i_len] = GetWLE( p_data + 2*i_len ); \
662 psz_str[i_size/2] = '\0'; \
665 if( ( i_peek = input_Peek( p_input, &p_peek, p_cd->i_object_size ) ) < 34 )
669 p_data = p_peek + 24;
671 i_title = GetWLE( p_data ); p_data += 2;
672 i_author= GetWLE( p_data ); p_data += 2;
673 i_copyright = GetWLE( p_data ); p_data += 2;
674 i_description = GetWLE( p_data ); p_data += 2;
675 i_rating = GetWLE( p_data ); p_data += 2;
677 GETSTRINGW( p_cd->psz_title, i_title );
678 GETSTRINGW( p_cd->psz_author, i_author );
679 GETSTRINGW( p_cd->psz_copyright, i_copyright );
680 GETSTRINGW( p_cd->psz_description, i_description );
681 GETSTRINGW( p_cd->psz_rating, i_rating );
687 "Read \"Content Description Object\" title:\"%s\" author:\"%s\" copyright:\"%s\" description:\"%s\" rating:\"%s\"",
691 p_cd->psz_description,
697 void ASF_FreeObject_content_description( input_thread_t *p_input,
698 asf_object_t *p_obj )
700 asf_object_content_description_t *p_cd = (asf_object_content_description_t*)p_obj;
702 FREE( p_cd->psz_title );
703 FREE( p_cd->psz_author );
704 FREE( p_cd->psz_copyright );
705 FREE( p_cd->psz_description );
706 FREE( p_cd->psz_rating );
713 int (*ASF_ReadObject_function)( input_thread_t *p_input,
714 asf_object_t *p_obj );
715 void (*ASF_FreeObject_function)( input_thread_t *p_input,
716 asf_object_t *p_obj );
717 } ASF_Object_Function [] =
719 { &asf_object_header_guid, ASF_OBJECT_TYPE_HEADER, ASF_ReadObject_Header, ASF_FreeObject_Null },
720 { &asf_object_data_guid, ASF_OBJECT_TYPE_DATA, ASF_ReadObject_Data, ASF_FreeObject_Null },
721 { &asf_object_index_guid, ASF_OBJECT_TYPE_INDEX, ASF_ReadObject_Index, ASF_FreeObject_Index },
722 { &asf_object_file_properties_guid, ASF_OBJECT_TYPE_FILE_PROPERTIES, ASF_ReadObject_file_properties, ASF_FreeObject_Null },
723 { &asf_object_stream_properties_guid, ASF_OBJECT_TYPE_STREAM_PROPERTIES, ASF_ReadObject_stream_properties,ASF_FreeObject_stream_properties },
724 { &asf_object_header_extention_guid, ASF_OBJECT_TYPE_EXTENTION_HEADER, ASF_ReadObject_header_extention, ASF_FreeObject_header_extention},
725 { &asf_object_codec_list_guid, ASF_OBJECT_TYPE_CODEC_LIST, ASF_ReadObject_codec_list, ASF_FreeObject_codec_list },
726 { &asf_object_marker_guid, ASF_OBJECT_TYPE_MARKER, NULL, NULL },
727 { &asf_object_content_description_guid, ASF_OBJECT_TYPE_CONTENT_DESCRIPTION, ASF_ReadObject_content_description, ASF_FreeObject_content_description },
729 { &asf_object_null_guid, 0, NULL, NULL }
732 int ASF_ReadObject( input_thread_t *p_input,
734 asf_object_t *p_father )
743 if( !ASF_ReadObjectCommon( p_input, p_obj ) )
745 msg_Warn( p_input, "Cannot read one asf object" );
748 p_obj->common.p_father = p_father;
749 p_obj->common.p_first = NULL;
750 p_obj->common.p_next = NULL;
751 p_obj->common.p_last = NULL;
754 if( p_obj->common.i_object_size < 24 )
756 msg_Warn( p_input, "Found a corrupted asf object (size<24)" );
759 /* find this object */
760 for( i_index = 0; ; i_index++ )
762 if( CmpGUID( ASF_Object_Function[i_index].p_id,
763 &p_obj->common.i_object_id )||
764 CmpGUID( ASF_Object_Function[i_index].p_id,
765 &asf_object_null_guid ) )
770 p_obj->common.i_type = ASF_Object_Function[i_index].i_type;
772 /* Now load this object */
773 if( ASF_Object_Function[i_index].ASF_ReadObject_function == NULL )
775 msg_Warn( p_input, "Unknown asf object (not loaded)" );
780 /* XXX ASF_ReadObject_function realloc *pp_obj XXX */
782 (ASF_Object_Function[i_index].ASF_ReadObject_function)( p_input,
786 /* link this object with father */
789 if( p_father->common.p_first )
791 p_father->common.p_last->common.p_next = p_obj;
795 p_father->common.p_first = p_obj;
797 p_father->common.p_last = p_obj;
803 void ASF_FreeObject( input_thread_t *p_input,
804 asf_object_t *p_obj )
807 asf_object_t *p_child;
814 /* Free all child object */
815 p_child = p_obj->common.p_first;
818 asf_object_t *p_next;
819 p_next = p_child->common.p_next;
820 ASF_FreeObject( p_input, p_child );
824 /* find this object */
825 for( i_index = 0; ; i_index++ )
827 if( CmpGUID( ASF_Object_Function[i_index].p_id,
828 &p_obj->common.i_object_id )||
829 CmpGUID( ASF_Object_Function[i_index].p_id,
830 &asf_object_null_guid ) )
836 /* Now free this object */
837 if( ASF_Object_Function[i_index].ASF_FreeObject_function == NULL )
840 "Unknown asf object " GUID_FMT,
841 GUID_PRINT( p_obj->common.i_object_id ) );
847 "Free asf object " GUID_FMT,
848 GUID_PRINT( p_obj->common.i_object_id ) );
850 (ASF_Object_Function[i_index].ASF_FreeObject_function)( p_input,
857 /*****************************************************************************
858 * ASF_ReadObjetRoot : parse the entire stream/file
859 *****************************************************************************/
860 int ASF_ReadObjectRoot( input_thread_t *p_input,
861 asf_object_root_t *p_root,
866 p_root->i_type = ASF_OBJECT_TYPE_ROOT;
867 memcpy( &p_root->i_object_id, &asf_object_null_guid, sizeof( guid_t ) );
868 p_root->i_object_pos = 0;
869 p_root->i_object_size = p_input->stream.p_selected_area->i_size;
870 p_root->p_first = NULL;
871 p_root->p_last = NULL;
872 p_root->p_next = NULL;
873 p_root->p_hdr = NULL;
874 p_root->p_data = NULL;
875 p_root->p_index = NULL;
879 p_obj = malloc( sizeof( asf_object_t ) );
881 if( !( ASF_ReadObject( p_input, p_obj, (asf_object_t*)p_root ) ) )
885 switch( p_obj->common.i_type )
887 case( ASF_OBJECT_TYPE_HEADER ):
888 p_root->p_hdr = (asf_object_header_t*)p_obj;
890 case( ASF_OBJECT_TYPE_DATA ):
891 p_root->p_data = (asf_object_data_t*)p_obj;
893 case( ASF_OBJECT_TYPE_INDEX ):
894 p_root->p_index = (asf_object_index_t*)p_obj;
897 msg_Warn( p_input, "Unknow Object found" );
900 if( !b_seekable && ( p_root->p_hdr && p_root->p_data ) )
902 /* For unseekable stream it's enouth to play */
906 if( !ASF_NextObject( p_input, p_obj ) ) /* Go to the next object */
913 void ASF_FreeObjectRoot( input_thread_t *p_input,
914 asf_object_root_t *p_root )
918 p_obj = p_root->p_first;
921 asf_object_t *p_next;
922 p_next = p_obj->common.p_next;
923 ASF_FreeObject( p_input, p_obj );
926 p_root->p_first = NULL;
927 p_root->p_last = NULL;
928 p_root->p_next = NULL;
930 p_root->p_hdr = NULL;
931 p_root->p_data = NULL;
932 p_root->p_index = NULL;
936 int __ASF_CountObject( asf_object_t *p_obj, const guid_t *p_guid )
939 asf_object_t *p_child;
947 p_child = p_obj->common.p_first;
950 if( CmpGUID( &p_child->common.i_object_id, p_guid ) )
954 p_child = p_child->common.p_next;
959 void *__ASF_FindObject( asf_object_t *p_obj, const guid_t *p_guid, int i_number )
961 asf_object_t *p_child;
963 p_child = p_obj->common.p_first;
967 if( CmpGUID( &p_child->common.i_object_id, p_guid ) )
977 p_child = p_child->common.p_next;