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vlc/modules/demux/asf/libasf.c

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/*****************************************************************************
* libasf.c : asf stream demux module for vlc
*****************************************************************************
* Copyright © 2001-2004, 2006-2008 VLC authors and VideoLAN
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Gildas Bazin <gbazin@videolan.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <limits.h>
#include <vlc_demux.h>
#include <vlc_charset.h> /* FromCharset */
#include "libasf.h"
#ifndef NDEBUG
# define ASF_DEBUG 1
#endif
/* Helpers:
* They ensure that invalid reads will not create problems.
* They are expansion safe
* They make the following assumptions:
* const uint8_t *p_peek exists and points to the start of a buffer
* ssize_t i_peek the size of the buffer pointed to by p_peek
* const uint8_t *p_data exits and points to the data inside p_peek to be read.
*/
/* ASF_HAVE(n):
* Check that n bytes can be read */
static inline bool AsfObjectHelperHave( const uint8_t *p_peek, size_t i_peek, const uint8_t *p_current, size_t i_wanted )
{
if( i_wanted > i_peek )
return false;
return &p_current[i_wanted] <= &p_peek[i_peek];
}
#define ASF_HAVE(n) AsfObjectHelperHave( p_peek, i_peek, p_data, n )
/* ASF_SKIP(n)
* Skip n bytes if possible */
static inline void AsfObjectHelperSkip( const uint8_t *p_peek, size_t i_peek, uint8_t **pp_data, size_t i_wanted )
{
if( AsfObjectHelperHave( p_peek, i_peek, *pp_data, i_wanted ) )
*pp_data += i_wanted;
else
*pp_data = (uint8_t*)&p_peek[i_peek];
}
#define ASF_SKIP(n) AsfObjectHelperSkip( p_peek, i_peek, (uint8_t**)&p_data, n )
/* ASF_READX()
* Read X byte if possible, else return 0 */
#define ASF_FUNCTION_READ_X(type, x, cmd ) \
static inline type AsfObjectHelperRead##x( const uint8_t *p_peek, size_t i_peek, uint8_t **pp_data ) { \
uint8_t *p_data = *pp_data; \
type i_ret = 0; \
if( ASF_HAVE(x) ) \
i_ret = cmd; \
ASF_SKIP(x); \
*pp_data = p_data; \
return i_ret; }
ASF_FUNCTION_READ_X( uint8_t, 1, *p_data )
ASF_FUNCTION_READ_X( uint16_t, 2, GetWLE(p_data) )
ASF_FUNCTION_READ_X( uint32_t, 4, GetDWLE(p_data) )
ASF_FUNCTION_READ_X( uint64_t, 8, GetQWLE(p_data) )
#define ASF_READ1() AsfObjectHelperRead1( p_peek, i_peek, (uint8_t**)&p_data )
#define ASF_READ2() AsfObjectHelperRead2( p_peek, i_peek, (uint8_t**)&p_data )
#define ASF_READ4() AsfObjectHelperRead4( p_peek, i_peek, (uint8_t**)&p_data )
#define ASF_READ8() AsfObjectHelperRead8( p_peek, i_peek, (uint8_t**)&p_data )
/* ASF_READS(n)
* Read a string of n/2 wchar long ie n bytes. Do a stupid conversion (suppose latin1)
* Return allocated "" if not possible */
static char *AsfObjectHelperReadString( const uint8_t *p_peek, size_t i_peek, uint8_t **pp_data, size_t i_size )
{
uint8_t *p_data = *pp_data;
char *psz_string = NULL;
if( ASF_HAVE(i_size) )
{
psz_string = FromCharset( "UTF-16LE", p_data, i_size );
}
ASF_SKIP(i_size);
*pp_data = p_data;
return psz_string;
}
#define ASF_READS(n) AsfObjectHelperReadString( p_peek, i_peek, (uint8_t**)&p_data, n )
/****************************************************************************
*
****************************************************************************/
static int ASF_ReadObject( stream_t *, asf_object_t *, asf_object_t * );
static void ASF_ParentObject( asf_object_t *p_father, asf_object_t *p_obj );
/****************************************************************************
*
****************************************************************************/
static int ASF_ReadObjectCommon( stream_t *s, asf_object_t *p_obj )
{
asf_object_common_t *p_common = &p_obj->common;
const uint8_t *p_peek;
if( vlc_stream_Peek( s, &p_peek, ASF_OBJECT_COMMON_SIZE ) < ASF_OBJECT_COMMON_SIZE )
return VLC_EGENERIC;
ASF_GetGUID( &p_common->i_object_id, p_peek );
p_common->i_object_size = GetQWLE( p_peek + 16 );
p_common->i_object_pos = vlc_stream_Tell( s );
p_common->p_next = NULL;
#ifdef ASF_DEBUG
msg_Dbg( s,
"found object guid: " GUID_FMT " size:%"PRIu64" at %"PRIu64,
GUID_PRINT( p_common->i_object_id ),
p_common->i_object_size, p_common->i_object_pos );
#endif
return VLC_SUCCESS;
}
static int ASF_NextObject( stream_t *s, asf_object_t *p_obj, uint64_t i_boundary )
{
asf_object_t obj;
int64_t i_pos = vlc_stream_Tell( s );
if ( i_boundary && i_pos >= 0 && (uint64_t) i_pos >= i_boundary )
{
return VLC_EGENERIC;
}
if( p_obj == NULL )
{
if( ASF_ReadObjectCommon( s, &obj ) )
return VLC_EGENERIC;
p_obj = &obj;
}
if( p_obj->common.i_object_size <= 0 )
return VLC_EGENERIC;
if( ( UINT64_MAX - p_obj->common.i_object_pos ) < p_obj->common.i_object_size )
return VLC_EGENERIC;
if( p_obj->common.p_father &&
p_obj->common.p_father->common.i_object_size != 0 )
{
if( p_obj->common.p_father->common.i_object_pos +
p_obj->common.p_father->common.i_object_size <
p_obj->common.i_object_pos + p_obj->common.i_object_size + ASF_OBJECT_COMMON_SIZE )
/* ASF_OBJECT_COMMON_SIZE is min size of an object */
{
return VLC_EGENERIC;
}
}
return vlc_stream_Seek( s, p_obj->common.i_object_pos +
p_obj->common.i_object_size );
}
static void ASF_FreeObject_Null( asf_object_t *pp_obj )
{
VLC_UNUSED(pp_obj);
}
static int ASF_ReadObject_Header( stream_t *s, asf_object_t *p_obj )
{
asf_object_header_t *p_hdr = &p_obj->header;
asf_object_t *p_subobj;
const uint8_t *p_peek;
if( vlc_stream_Peek( s, &p_peek, 30 ) < 30 )
return VLC_EGENERIC;
p_hdr->i_sub_object_count = GetDWLE( p_peek + ASF_OBJECT_COMMON_SIZE );
p_hdr->i_reserved1 = p_peek[28];
p_hdr->i_reserved2 = p_peek[29];
p_hdr->p_first = NULL;
p_hdr->p_last = NULL;
#ifdef ASF_DEBUG
msg_Dbg( s,
"read \"header object\" subobj:%u, reserved1:%u, reserved2:%u",
p_hdr->i_sub_object_count,
p_hdr->i_reserved1,
p_hdr->i_reserved2 );
#endif
if( vlc_stream_Read( s, NULL, 30 ) != 30 )
return VLC_EGENERIC;
/* Now load sub object */
for( ; ; )
{
p_subobj = malloc( sizeof( asf_object_t ) );
if( !p_subobj || ASF_ReadObject( s, p_subobj, (asf_object_t*)p_hdr ) )
{
free( p_subobj );
break;
}
if( ASF_NextObject( s, p_subobj, 0 ) ) /* Go to the next object */
break;
}
return VLC_SUCCESS;
}
static int ASF_ReadObject_Data( stream_t *s, asf_object_t *p_obj )
{
asf_object_data_t *p_data = &p_obj->data;
const uint8_t *p_peek;
if( vlc_stream_Peek( s, &p_peek, 50 ) < 50 )
return VLC_EGENERIC;
ASF_GetGUID( &p_data->i_file_id, p_peek + ASF_OBJECT_COMMON_SIZE );
p_data->i_total_data_packets = GetQWLE( p_peek + 40 );
p_data->i_reserved = GetWLE( p_peek + 48 );
#ifdef ASF_DEBUG
msg_Dbg( s,
"read \"data object\" file_id:" GUID_FMT " total data packet:"
"%"PRIu64" reserved:%u",
GUID_PRINT( p_data->i_file_id ),
p_data->i_total_data_packets,
p_data->i_reserved );
#endif
return VLC_SUCCESS;
}
static int ASF_ReadObject_Index( stream_t *s, asf_object_t *p_obj )
{
asf_object_index_t *p_index = &p_obj->index;
const uint8_t *p_peek;
unsigned int i;
/* We just ignore error on the index */
if( p_index->i_object_size < 56
|| p_index->i_object_size > INT32_MAX
|| vlc_stream_Peek( s, &p_peek, p_index->i_object_size )
< (int64_t)p_index->i_object_size )
return VLC_SUCCESS;
ASF_GetGUID( &p_index->i_file_id, p_peek + ASF_OBJECT_COMMON_SIZE );
p_index->i_index_entry_time_interval = GetQWLE( p_peek + 40 );
p_index->i_max_packet_count = GetDWLE( p_peek + 48 );
p_index->i_index_entry_count = GetDWLE( p_peek + 52 );
p_index->index_entry = NULL;
#ifdef ASF_DEBUG
msg_Dbg( s,
"read \"index object\" file_id:" GUID_FMT
" index_entry_time_interval:%"PRId64" max_packet_count:%u "
"index_entry_count:%u",
GUID_PRINT( p_index->i_file_id ),
p_index->i_index_entry_time_interval,
p_index->i_max_packet_count,
p_index->i_index_entry_count );
#endif
/* Sanity checking */
if( !p_index->i_index_entry_time_interval )
{
/* We can't use this index if it has an invalid time interval */
p_index->i_index_entry_count = 0;
return VLC_ENOMEM;
}
if( p_index->i_index_entry_count > (p_index->i_object_size - 56) / 6 )
p_index->i_index_entry_count = (p_index->i_object_size - 56) / 6;
p_index->index_entry = calloc( p_index->i_index_entry_count,
sizeof(asf_index_entry_t) );
if( !p_index->index_entry )
{
p_index->i_index_entry_count = 0;
return VLC_ENOMEM;
}
for( i = 0, p_peek += 56; i < p_index->i_index_entry_count; i++, p_peek += 6 )
{
p_index->index_entry[i].i_packet_number = GetDWLE( p_peek );
p_index->index_entry[i].i_packet_count = GetWLE( p_peek + 4 );
}
return VLC_SUCCESS;
}
static void ASF_FreeObject_Index( asf_object_t *p_obj )
{
asf_object_index_t *p_index = &p_obj->index;
FREENULL( p_index->index_entry );
}
static int ASF_ReadObject_file_properties( stream_t *s, asf_object_t *p_obj )
{
asf_object_file_properties_t *p_fp = &p_obj->file_properties;
const uint8_t *p_peek;
if( vlc_stream_Peek( s, &p_peek, 104 ) < 104 )
return VLC_EGENERIC;
ASF_GetGUID( &p_fp->i_file_id, p_peek + ASF_OBJECT_COMMON_SIZE );
p_fp->i_file_size = GetQWLE( p_peek + 40 );
p_fp->i_creation_date = GetQWLE( p_peek + 48 );
p_fp->i_data_packets_count = GetQWLE( p_peek + 56 );
p_fp->i_play_duration = GetQWLE( p_peek + 64 );
p_fp->i_send_duration = GetQWLE( p_peek + 72 );
uint64_t preroll = GetQWLE( p_peek + 80 );
if (unlikely(preroll > INT32_MAX)) // sanity check on "appropriate" value
return VLC_EINVAL;
p_fp->i_preroll = VLC_TICK_FROM_MS(preroll);
p_fp->i_flags = GetDWLE( p_peek + 88 );
p_fp->i_min_data_packet_size = __MAX( GetDWLE( p_peek + 92 ), (uint32_t) 1 );
p_fp->i_max_data_packet_size = __MAX( GetDWLE( p_peek + 96 ), (uint32_t) 1 );
p_fp->i_max_bitrate = GetDWLE( p_peek + 100 );
#ifdef ASF_DEBUG
msg_Dbg( s,
"read \"file properties object\" file_id:" GUID_FMT
" file_size:%"PRIu64" creation_date:%"PRIu64" data_packets_count:"
"%"PRIu64" play_duration:%"PRId64" send_duration:%"PRId64" preroll:%"PRIu64
" flags:%u min_data_packet_size:%d "
" max_data_packet_size:%u max_bitrate:%u",
GUID_PRINT( p_fp->i_file_id ), p_fp->i_file_size,
p_fp->i_creation_date, p_fp->i_data_packets_count,
p_fp->i_play_duration, p_fp->i_send_duration,
preroll, p_fp->i_flags,
p_fp->i_min_data_packet_size, p_fp->i_max_data_packet_size,
p_fp->i_max_bitrate );
#endif
return VLC_SUCCESS;
}
static void ASF_FreeObject_metadata( asf_object_t *p_obj )
{
asf_object_metadata_t *p_meta = &p_obj->metadata;
for( uint32_t i = 0; i < p_meta->i_record_entries_count; i++ )
{
free( p_meta->record[i].psz_name );
free( p_meta->record[i].p_data );
}
free( p_meta->record );
}
static int ASF_ReadObject_metadata( stream_t *s, asf_object_t *p_obj )
{
asf_object_metadata_t *p_meta = &p_obj->metadata;
uint32_t i;
const uint8_t *p_peek, *p_data;
if( p_meta->i_object_size < 26 || p_meta->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_meta->i_object_size );
if( i_peek < (int64_t)p_meta->i_object_size )
return VLC_EGENERIC;
p_meta->i_record_entries_count = GetWLE( p_peek + ASF_OBJECT_COMMON_SIZE );
p_data = p_peek + 26;
p_meta->record = calloc( p_meta->i_record_entries_count,
sizeof(asf_metadata_record_t) );
if( !p_meta->record )
{
p_meta->i_record_entries_count = 0;
return VLC_ENOMEM;
}
for( i = 0; i < p_meta->i_record_entries_count; i++ )
{
asf_metadata_record_t *p_record = &p_meta->record[i];
uint16_t i_name;
uint32_t i_data;
if( !ASF_HAVE( 2+2+2+2+4 ) )
break;
if( ASF_READ2() != 0 )
break;
p_record->i_stream = ASF_READ2();
i_name = ASF_READ2();
p_record->i_type = ASF_READ2();
i_data = ASF_READ4();
if( UINT32_MAX - i_name < i_data ||
!ASF_HAVE( i_name + i_data ) )
break;
/* Read name */
p_record->psz_name = ASF_READS( i_name );
/* Read data */
if( p_record->i_type == ASF_METADATA_TYPE_STRING )
{
p_record->p_data = (uint8_t *)ASF_READS( i_data );
if( p_record->p_data )
p_record->i_data = i_data/2; /* FIXME Is that needed ? */
}
else if( p_record->i_type == ASF_METADATA_TYPE_BYTE )
{
p_record->p_data = malloc( i_data );
if( p_record->p_data )
{
p_record->i_data = i_data;
if( p_record->p_data && i_data > 0 )
memcpy( p_record->p_data, p_data, i_data );
}
p_data += i_data;
}
else if( p_record->i_type == ASF_METADATA_TYPE_QWORD )
{
p_record->i_val = ASF_READ8();
}
else if( p_record->i_type == ASF_METADATA_TYPE_DWORD )
{
p_record->i_val = ASF_READ4();
}
else if( p_record->i_type == ASF_METADATA_TYPE_WORD )
{
p_record->i_val = ASF_READ2();
}
else if( p_record->i_type == ASF_METADATA_TYPE_BOOL )
{
p_record->i_val = ASF_READ2();
}
else
{
/* Unknown */
p_data += i_data;
}
}
p_meta->i_record_entries_count = i;
#ifdef ASF_DEBUG
msg_Dbg( s,
"read \"metadata object\" %"PRIu32" entries",
p_meta->i_record_entries_count );
for( uint32_t j = 0; j < p_meta->i_record_entries_count; j++ )
{
asf_metadata_record_t *p_rec = &p_meta->record[j];
if( p_rec->i_type == ASF_METADATA_TYPE_STRING )
msg_Dbg( s, " - %s=%s",
p_rec->psz_name, p_rec->p_data );
else if( p_rec->i_type == ASF_METADATA_TYPE_BYTE )
msg_Dbg( s, " - %s (%u bytes)",
p_rec->psz_name, p_rec->i_data );
else
msg_Dbg( s, " - %s=%"PRIu64,
p_rec->psz_name, p_rec->i_val );
}
#endif
return VLC_SUCCESS;
}
static int ASF_ReadObject_header_extension( stream_t *s, asf_object_t *p_obj )
{
asf_object_header_extension_t *p_he = &p_obj->header_extension;
const uint8_t *p_peek;
if( p_he->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_he->i_object_size );
if( i_peek < 46 )
return VLC_EGENERIC;
ASF_GetGUID( &p_he->i_reserved1, p_peek + ASF_OBJECT_COMMON_SIZE );
p_he->i_reserved2 = GetWLE( p_peek + 40 );
p_he->i_header_extension_size = GetDWLE( p_peek + 42 );
if( p_he->i_header_extension_size )
{
if( (unsigned int)(i_peek-46) < p_he->i_header_extension_size )
return VLC_EGENERIC;
p_he->p_header_extension_data =
malloc( p_he->i_header_extension_size );
if( !p_he->p_header_extension_data )
return VLC_ENOMEM;
memcpy( p_he->p_header_extension_data, p_peek + 46,
p_he->i_header_extension_size );
}
else
{
p_he->p_header_extension_data = NULL;
p_he->i_header_extension_size = 0;
}
#ifdef ASF_DEBUG
msg_Dbg( s,
"read \"header extension object\" reserved1:" GUID_FMT
" reserved2:%u header_extension_size:%"PRIu32,
GUID_PRINT( p_he->i_reserved1 ), p_he->i_reserved2,
p_he->i_header_extension_size );
#endif
if( !p_he->i_header_extension_size ) return VLC_SUCCESS;
/* Read the extension objects */
if( vlc_stream_Read( s, NULL, 46 ) != 46 )
{
free( p_he->p_header_extension_data );
return VLC_EGENERIC;
}
for( ; ; )
{
asf_object_t *p_child = malloc( sizeof( asf_object_t ) );
if( p_child == NULL
|| ASF_ReadObject( s, p_child, (asf_object_t*)p_he ) )
{
free( p_child );
break;
}
if( ASF_NextObject( s, p_child, 0 ) ) /* Go to the next object */
{
break;
}
}
return VLC_SUCCESS;
}
static void ASF_FreeObject_header_extension( asf_object_t *p_obj )
{
asf_object_header_extension_t *p_he = &p_obj->header_extension;
FREENULL( p_he->p_header_extension_data );
}
static int ASF_ReadObject_stream_properties( stream_t *s, asf_object_t *p_obj )
{
asf_object_stream_properties_t *p_sp = &p_obj->stream_properties;
const uint8_t *p_peek;
#if UINT64_MAX > SSIZE_MAX
if( p_sp->i_object_size > SSIZE_MAX )
{
msg_Err( s, "unable to peek: object size is too large" );
return VLC_EGENERIC;
}
#endif
if( p_sp->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_sp->i_object_size );
if( i_peek < 78 )
return VLC_EGENERIC;
ASF_GetGUID( &p_sp->i_stream_type, p_peek + ASF_OBJECT_COMMON_SIZE );
ASF_GetGUID( &p_sp->i_error_correction_type, p_peek + 40 );
p_sp->i_time_offset = GetQWLE( p_peek + 56 );
p_sp->i_type_specific_data_length = GetDWLE( p_peek + 64 );
p_sp->i_error_correction_data_length = GetDWLE( p_peek + 68 );
p_sp->i_flags = GetWLE( p_peek + 72 );
p_sp->i_stream_number = p_sp->i_flags&0x07f;
if ( p_sp->i_stream_number > ASF_MAX_STREAMNUMBER )
return VLC_EGENERIC;
p_sp->i_reserved = GetDWLE( p_peek + 74 );
i_peek -= 78;
if( p_sp->i_type_specific_data_length )
{
if( i_peek < p_sp->i_type_specific_data_length )
return VLC_EGENERIC;
p_sp->p_type_specific_data =
malloc( p_sp->i_type_specific_data_length );
if( !p_sp->p_type_specific_data )
return VLC_ENOMEM;
memcpy( p_sp->p_type_specific_data, p_peek + 78,
p_sp->i_type_specific_data_length );
i_peek -= p_sp->i_type_specific_data_length;
}
if( p_sp->i_error_correction_data_length )
{
if( i_peek < p_sp->i_error_correction_data_length )
{
free( p_sp->p_type_specific_data );
return VLC_EGENERIC;
}
p_sp->p_error_correction_data =
malloc( p_sp->i_error_correction_data_length );
if( !p_sp->p_error_correction_data )
{
free( p_sp->p_type_specific_data );
return VLC_ENOMEM;
}
memcpy( p_sp->p_error_correction_data,
p_peek + 78 + p_sp->i_type_specific_data_length,
p_sp->i_error_correction_data_length );
}
#ifdef ASF_DEBUG
msg_Dbg( s,
"read \"stream Properties object\" stream_type:" GUID_FMT
" error_correction_type:" GUID_FMT " time_offset:%"PRIu64
" type_specific_data_length:%"PRIu32" error_correction_data_length:%"PRIu32
" flags:0x%x stream_number:%u",
GUID_PRINT( p_sp->i_stream_type ),
GUID_PRINT( p_sp->i_error_correction_type ),
p_sp->i_time_offset,
p_sp->i_type_specific_data_length,
p_sp->i_error_correction_data_length,
p_sp->i_flags,
p_sp->i_stream_number );
#endif
return VLC_SUCCESS;
}
static void ASF_FreeObject_stream_properties( asf_object_t *p_obj )
{
asf_object_stream_properties_t *p_sp = &p_obj->stream_properties;
FREENULL( p_sp->p_type_specific_data );
FREENULL( p_sp->p_error_correction_data );
}
static void ASF_FreeObject_codec_list( asf_object_t *p_obj )
{
asf_object_codec_list_t *p_cl = &p_obj->codec_list;
for( asf_codec_entry_t *codec = p_cl->codecs, *next;
codec != NULL;
codec = next )
{
next = codec->p_next;
free( codec->psz_name );
free( codec->psz_description );
free( codec->p_information );
free( codec );
}
}
static int ASF_ReadObject_codec_list( stream_t *s, asf_object_t *p_obj )
{
asf_object_codec_list_t *p_cl = &p_obj->codec_list;
const uint8_t *p_peek, *p_data;
if( p_cl->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_cl->i_object_size );
if( i_peek < 44 )
return VLC_EGENERIC;
ASF_GetGUID( &p_cl->i_reserved, p_peek + ASF_OBJECT_COMMON_SIZE );
uint32_t count = GetDWLE( p_peek + 40 );
#ifdef ASF_DEBUG
msg_Dbg( s, "read \"codec list object\" reserved_guid:" GUID_FMT
" codec_entries_count:%u", GUID_PRINT( p_cl->i_reserved ),
count );
#endif
p_data = p_peek + 44;
asf_codec_entry_t **pp = &p_cl->codecs;
for( uint32_t i = 0; i < count; i++ )
{
asf_codec_entry_t *p_codec = malloc( sizeof( *p_codec ) );
if( unlikely(p_codec == NULL) || !ASF_HAVE( 2+2+2 ) )
{
free( p_codec );
*pp = NULL;
goto error;
}
/* */
p_codec->i_type = ASF_READ2();
/* XXX the length here are the number of *unicode* characters and
* not of bytes like nearly every elsewhere */
/* codec name */
p_codec->psz_name = ASF_READS( 2*ASF_READ2() );
/* description */
p_codec->psz_description = ASF_READS( 2*ASF_READ2() );
/* opaque information */
p_codec->i_information_length = ASF_READ2();
if( ASF_HAVE( p_codec->i_information_length ) )
{
p_codec->p_information = malloc( p_codec->i_information_length );
if( likely(p_codec->p_information != NULL) )
memcpy( p_codec->p_information, p_data,
p_codec->i_information_length );
p_data += p_codec->i_information_length;
}
else
p_codec->p_information = NULL;
#ifdef ASF_DEBUG
msg_Dbg( s, " - codec[%"PRIu32"] %s name:\"%s\" "
"description:\"%s\" information_length:%u", i,
( p_codec->i_type == ASF_CODEC_TYPE_VIDEO ) ? "video"
: ( ( p_codec->i_type == ASF_CODEC_TYPE_AUDIO ) ? "audio"
: "unknown" ), p_codec->psz_name,
p_codec->psz_description, p_codec->i_information_length );
#endif
*pp = p_codec;
pp = &p_codec->p_next;
}
*pp = NULL;
return VLC_SUCCESS;
error:
ASF_FreeObject_codec_list( p_obj );
return VLC_EGENERIC;
}
static inline char *get_wstring( const uint8_t *p_data, size_t i_size )
{
char *psz_str = FromCharset( "UTF-16LE", p_data, i_size );
if( psz_str )
p_data += i_size;
return psz_str;
}
/* Microsoft should go to hell. This time the length give number of bytes
* and for the some others object, length give char16 count ... */
static int ASF_ReadObject_content_description(stream_t *s, asf_object_t *p_obj)
{
asf_object_content_description_t *p_cd = &p_obj->content_description;
const uint8_t *p_peek, *p_data;
uint16_t i_title, i_artist, i_copyright, i_description, i_rating;
if( p_cd->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_cd->i_object_size );
if( i_peek < 34 )
return VLC_EGENERIC;
p_data = p_peek + ASF_OBJECT_COMMON_SIZE;
i_title = ASF_READ2();
i_artist = ASF_READ2();
i_copyright = ASF_READ2();
i_description = ASF_READ2();
i_rating = ASF_READ2();
if( !ASF_HAVE( i_title+i_artist+i_copyright+i_description+i_rating ) )
return VLC_EGENERIC;
p_cd->psz_title = get_wstring( p_data, i_title );
p_cd->psz_artist = get_wstring( p_data, i_artist );
p_cd->psz_copyright = get_wstring( p_data, i_copyright );
p_cd->psz_description = get_wstring( p_data, i_description );
p_cd->psz_rating = get_wstring( p_data, i_rating );
#ifdef ASF_DEBUG
msg_Dbg( s,
"read \"content description object\" title:\"%s\" artist:\"%s\" copyright:\"%s\" description:\"%s\" rating:\"%s\"",
p_cd->psz_title,
p_cd->psz_artist,
p_cd->psz_copyright,
p_cd->psz_description,
p_cd->psz_rating );
#endif
return VLC_SUCCESS;
}
static void ASF_FreeObject_content_description( asf_object_t *p_obj)
{
asf_object_content_description_t *p_cd = &p_obj->content_description;
FREENULL( p_cd->psz_title );
FREENULL( p_cd->psz_artist );
FREENULL( p_cd->psz_copyright );
FREENULL( p_cd->psz_description );
FREENULL( p_cd->psz_rating );
}
/* Language list: */
static int ASF_ReadObject_language_list(stream_t *s, asf_object_t *p_obj)
{
asf_object_language_list_t *p_ll = &p_obj->language_list;
const uint8_t *p_peek, *p_data;
uint16_t i;
if( p_ll->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_ll->i_object_size );
if( i_peek < 26 )
return VLC_EGENERIC;
p_data = &p_peek[ASF_OBJECT_COMMON_SIZE];
p_ll->i_language = ASF_READ2();
if( p_ll->i_language > 0 )
{
p_ll->ppsz_language = calloc( p_ll->i_language, sizeof( char *) );
if( !p_ll->ppsz_language )
return VLC_ENOMEM;
for( i = 0; i < p_ll->i_language; i++ )
{
if( !ASF_HAVE(1) )
break;
p_ll->ppsz_language[i] = ASF_READS( ASF_READ1() );
}
p_ll->i_language = i;
}
#ifdef ASF_DEBUG
msg_Dbg( s, "read \"language list object\" %u entries",
p_ll->i_language );
for( i = 0; i < p_ll->i_language; i++ )
msg_Dbg( s, " - '%s'",
p_ll->ppsz_language[i] );
#endif
return VLC_SUCCESS;
}
static void ASF_FreeObject_language_list( asf_object_t *p_obj)
{
asf_object_language_list_t *p_ll = &p_obj->language_list;
uint16_t i;
for( i = 0; i < p_ll->i_language; i++ )
FREENULL( p_ll->ppsz_language[i] );
FREENULL( p_ll->ppsz_language );
}
/* Stream bitrate properties */
static int ASF_ReadObject_stream_bitrate_properties( stream_t *s,
asf_object_t *p_obj)
{
asf_object_stream_bitrate_properties_t *p_sb = &p_obj->stream_bitrate;
const uint8_t *p_peek, *p_data;
uint16_t i;
if( p_sb->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_sb->i_object_size );
if( i_peek < 26 )
return VLC_EGENERIC;
p_data = &p_peek[ASF_OBJECT_COMMON_SIZE];
p_sb->i_bitrate = ASF_READ2();
if( p_sb->i_bitrate > ASF_MAX_STREAMNUMBER )
p_sb->i_bitrate = ASF_MAX_STREAMNUMBER; /* Buggy ? */
for( i = 0; i < p_sb->i_bitrate; i++ )
{
if( !ASF_HAVE(2 + 4) )
break;
p_sb->bitrate[i].i_stream_number = (uint8_t) ASF_READ2()& 0x7f;
if ( p_sb->bitrate[i].i_stream_number > ASF_MAX_STREAMNUMBER )
return VLC_EGENERIC;
p_sb->bitrate[i].i_avg_bitrate = ASF_READ4();
}
p_sb->i_bitrate = i;
#ifdef ASF_DEBUG
msg_Dbg( s,"read \"stream bitrate properties object\"" );
for( i = 0; i < p_sb->i_bitrate; i++ )
{
msg_Dbg( s," - stream=%u bitrate=%"PRIu32,
p_sb->bitrate[i].i_stream_number,
p_sb->bitrate[i].i_avg_bitrate );
}
#endif
return VLC_SUCCESS;
}
static void ASF_FreeObject_stream_bitrate_properties( asf_object_t *p_obj)
{
VLC_UNUSED(p_obj);
}
static void ASF_FreeObject_extended_stream_properties( asf_object_t *p_obj)
{
asf_object_extended_stream_properties_t *p_esp = &p_obj->ext_stream;
if ( p_esp->p_ext )
{
for( uint16_t i = 0; i < p_esp->i_payload_extension_system_count; i++ )
free( p_esp->p_ext[i].pi_info );
FREENULL( p_esp->p_ext );
}
for( uint16_t i = 0; i < p_esp->i_stream_name_count; i++ )
FREENULL( p_esp->ppsz_stream_name[i] );
FREENULL( p_esp->pi_stream_name_language );
FREENULL( p_esp->ppsz_stream_name );
}
static int ASF_ReadObject_extended_stream_properties( stream_t *s,
asf_object_t *p_obj)
{
asf_object_extended_stream_properties_t *p_esp = &p_obj->ext_stream;
const uint8_t *p_peek, *p_data;
uint16_t i;
if( p_esp->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_esp->i_object_size );
if( i_peek < 88 )
return VLC_EGENERIC;
p_data = &p_peek[ASF_OBJECT_COMMON_SIZE];
p_esp->i_start_time = GetQWLE( &p_data[0] );
p_esp->i_end_time = GetQWLE( &p_data[8] );
p_esp->i_data_bitrate = GetDWLE( &p_data[16] );
p_esp->i_buffer_size = GetDWLE( &p_data[20] );
p_esp->i_initial_buffer_fullness = GetDWLE( &p_data[ASF_OBJECT_COMMON_SIZE] );
p_esp->i_alternate_data_bitrate = GetDWLE( &p_data[28] );
p_esp->i_alternate_buffer_size = GetDWLE( &p_data[32] );
p_esp->i_alternate_initial_buffer_fullness = GetDWLE( &p_data[36] );
p_esp->i_maximum_object_size = GetDWLE( &p_data[40] );
p_esp->i_flags = GetDWLE( &p_data[44] );
p_esp->i_stream_number = GetWLE( &p_data[48] );
if ( p_esp->i_stream_number > ASF_MAX_STREAMNUMBER )
return VLC_EGENERIC;
p_esp->i_language_index = GetWLE( &p_data[50] );
p_esp->i_average_time_per_frame= GetQWLE( &p_data[52] );
p_esp->i_stream_name_count = GetWLE( &p_data[60] );
p_esp->i_payload_extension_system_count = GetWLE( &p_data[62] );
p_data += 64;
p_esp->pi_stream_name_language = calloc( p_esp->i_stream_name_count,
sizeof(*p_esp->pi_stream_name_language) );
p_esp->ppsz_stream_name = calloc( p_esp->i_stream_name_count,
sizeof(*p_esp->ppsz_stream_name) );
if( !p_esp->pi_stream_name_language ||
!p_esp->ppsz_stream_name )
{
free( p_esp->pi_stream_name_language );
free( p_esp->ppsz_stream_name );
return VLC_ENOMEM;
}
for( i = 0; i < p_esp->i_stream_name_count; i++ )
{
if( !ASF_HAVE( 2+2 ) )
break;
p_esp->pi_stream_name_language[i] = ASF_READ2();
p_esp->ppsz_stream_name[i] = ASF_READS( ASF_READ2() );
}
p_esp->i_stream_name_count = i;
p_esp->p_ext = calloc( p_esp->i_payload_extension_system_count,
sizeof( asf_payload_extension_system_t ) );
if ( p_esp->p_ext )
{
for( i = 0; i < p_esp->i_payload_extension_system_count; i++ )
{
asf_payload_extension_system_t *p_ext = & p_esp->p_ext[i];
if( !ASF_HAVE( 16+2+4 ) ) break;
ASF_GetGUID( &p_ext->i_extension_id, p_data );
ASF_SKIP( 16 ); // GUID
p_ext->i_data_size = ASF_READ2();
p_ext->i_info_length = ASF_READ4();
if ( p_ext->i_info_length )
{
if( !ASF_HAVE( p_ext->i_info_length ) ) break;
p_ext->pi_info = malloc( p_ext->i_info_length );
if ( p_ext->pi_info )
memcpy( p_ext->pi_info, p_data, p_ext->i_info_length );
ASF_SKIP( p_ext->i_info_length );
}
}
p_esp->i_payload_extension_system_count = i;
} else p_esp->i_payload_extension_system_count = 0;
p_esp->p_sp = NULL;
/* Read tail objects */
if( p_data < &p_peek[i_peek] )
{
if( vlc_stream_Read( s, NULL, p_data - p_peek ) != (p_data - p_peek) )
{
ASF_FreeObject_extended_stream_properties( p_obj );
return VLC_EGENERIC;
}
asf_object_t *p_sp = malloc( sizeof( asf_object_t ) );
if( !p_sp || ASF_ReadObject( s, p_sp, NULL ) )
{
free( p_sp );
}
else
{
/* This p_sp will be inserted by ReadRoot later */
p_esp->p_sp = (asf_object_stream_properties_t*)p_sp;
ASF_ParentObject( p_obj, p_sp );
}
}
#ifdef ASF_DEBUG
msg_Dbg( s, "read \"extended stream properties object\":" );
msg_Dbg( s, " - start=%"PRIu64" end=%"PRIu64,
p_esp->i_start_time, p_esp->i_end_time );
msg_Dbg( s, " - data bitrate=%"PRId32" buffer=%"PRId32" initial fullness=%"PRId32,
p_esp->i_data_bitrate,
p_esp->i_buffer_size,
p_esp->i_initial_buffer_fullness );
msg_Dbg( s, " - alternate data bitrate=%"PRId32" buffer=%"PRId32" initial fullness=%"PRId32,
p_esp->i_alternate_data_bitrate,
p_esp->i_alternate_buffer_size,
p_esp->i_alternate_initial_buffer_fullness );
msg_Dbg( s, " - maximum object size=%"PRId32, p_esp->i_maximum_object_size );
msg_Dbg( s, " - flags=0x%x", p_esp->i_flags );
msg_Dbg( s, " - stream number=%u language=%u",
p_esp->i_stream_number, p_esp->i_language_index );
msg_Dbg( s, " - average time per frame=%"PRIu64,
p_esp->i_average_time_per_frame );
msg_Dbg( s, " - stream name count=%u", p_esp->i_stream_name_count );
for( i = 0; i < p_esp->i_stream_name_count; i++ )
msg_Dbg( s, " - lang id=%u name=%s",
p_esp->pi_stream_name_language[i],
p_esp->ppsz_stream_name[i] );
msg_Dbg( s, " - payload extension system count=%u",
p_esp->i_payload_extension_system_count );
for( i = 0; i < p_esp->i_payload_extension_system_count; i++ )
msg_Dbg( s, " - %u - payload extension: " GUID_FMT, i,
GUID_PRINT( p_esp->p_ext[i].i_extension_id ) );
#endif
return VLC_SUCCESS;
}
static int ASF_ReadObject_advanced_mutual_exclusion( stream_t *s,
asf_object_t *p_obj)
{
asf_object_advanced_mutual_exclusion_t *p_ae = &p_obj->advanced_mutual_exclusion;
const uint8_t *p_peek, *p_data;
uint16_t i;
if( p_ae->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_ae->i_object_size );
if( i_peek < 42 )
return VLC_EGENERIC;
p_data = &p_peek[ASF_OBJECT_COMMON_SIZE];
if( !ASF_HAVE( 16 + 2 + 2 ) ) /* at least one entry */
return VLC_EGENERIC;
if ( guidcmp( (const vlc_guid_t *) p_data, &asf_guid_mutex_language ) )
p_ae->exclusion_type = LANGUAGE;
else if ( guidcmp( (const vlc_guid_t *) p_data, &asf_guid_mutex_bitrate ) )
p_ae->exclusion_type = BITRATE;
ASF_SKIP( 16 );
p_ae->i_stream_number_count = ASF_READ2();
p_ae->pi_stream_number = calloc( p_ae->i_stream_number_count, sizeof(*p_ae->pi_stream_number) );
if ( !p_ae->pi_stream_number )
{
p_ae->i_stream_number_count = 0;
return VLC_ENOMEM;
}
for( i = 0; i < p_ae->i_stream_number_count; i++ )
{
if( !ASF_HAVE(2) )
break;
p_ae->pi_stream_number[i] = ASF_READ2();
if ( p_ae->pi_stream_number[i] > ASF_MAX_STREAMNUMBER )
break;
}
p_ae->i_stream_number_count = i;
#ifdef ASF_DEBUG
msg_Dbg( s, "read \"advanced mutual exclusion object\" type %s",
p_ae->exclusion_type == LANGUAGE ? "Language" :
( p_ae->exclusion_type == BITRATE ) ? "Bitrate" : "Unknown"
);
for( i = 0; i < p_ae->i_stream_number_count; i++ )
msg_Dbg( s, " - stream=%u", p_ae->pi_stream_number[i] );
#endif
return VLC_SUCCESS;
}
static void ASF_FreeObject_advanced_mutual_exclusion( asf_object_t *p_obj)
{
asf_object_advanced_mutual_exclusion_t *p_ae = &p_obj->advanced_mutual_exclusion;
FREENULL( p_ae->pi_stream_number );
}
static int ASF_ReadObject_stream_prioritization( stream_t *s,
asf_object_t *p_obj)
{
asf_object_stream_prioritization_t *p_sp = &p_obj->stream_prioritization;
const uint8_t *p_peek, *p_data;
uint16_t i;
if( p_sp->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_sp->i_object_size );
if( i_peek < 26 )
return VLC_EGENERIC;
p_data = &p_peek[ASF_OBJECT_COMMON_SIZE];
p_sp->i_priority_count = ASF_READ2();
p_sp->pi_priority_flag = calloc( p_sp->i_priority_count,
sizeof(*p_sp->pi_priority_flag) );
p_sp->pi_priority_stream_number = calloc( p_sp->i_priority_count,
sizeof(*p_sp->pi_priority_stream_number) );
if( !p_sp->pi_priority_flag || !p_sp->pi_priority_stream_number )
{
free( p_sp->pi_priority_flag );
free( p_sp->pi_priority_stream_number );
return VLC_ENOMEM;
}
for( i = 0; i < p_sp->i_priority_count; i++ )
{
if( !ASF_HAVE(2+2) )
break;
p_sp->pi_priority_stream_number[i] = ASF_READ2();
p_sp->pi_priority_flag[i] = ASF_READ2();
}
p_sp->i_priority_count = i;
#ifdef ASF_DEBUG
msg_Dbg( s, "read \"stream prioritization object\"" );
for( i = 0; i < p_sp->i_priority_count; i++ )
msg_Dbg( s, " - Stream:%u flags=0x%x",
p_sp->pi_priority_stream_number[i],
p_sp->pi_priority_flag[i] );
#endif
return VLC_SUCCESS;
}
static void ASF_FreeObject_stream_prioritization( asf_object_t *p_obj)
{
asf_object_stream_prioritization_t *p_sp = &p_obj->stream_prioritization;
FREENULL( p_sp->pi_priority_stream_number );
FREENULL( p_sp->pi_priority_flag );
}
static int ASF_ReadObject_bitrate_mutual_exclusion( stream_t *s, asf_object_t *p_obj )
{
asf_object_bitrate_mutual_exclusion_t *p_ex = &p_obj->bitrate_mutual_exclusion;
const uint8_t *p_peek, *p_data;
if( p_ex->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_ex->i_object_size );
if( i_peek < 42 )
return VLC_EGENERIC;
p_data = &p_peek[ASF_OBJECT_COMMON_SIZE];
if( !ASF_HAVE( 16 + 2 + 2 ) ) /* at least one entry */
return VLC_EGENERIC;
if ( guidcmp( (const vlc_guid_t *) p_data, &asf_guid_mutex_language ) )
p_ex->exclusion_type = LANGUAGE;
else if ( guidcmp( (const vlc_guid_t *) p_data, &asf_guid_mutex_bitrate ) )
p_ex->exclusion_type = BITRATE;
ASF_SKIP( 16 );
p_ex->i_stream_number_count = ASF_READ2();
p_ex->pi_stream_numbers = calloc( p_ex->i_stream_number_count, sizeof(*p_ex->pi_stream_numbers) );
if ( ! p_ex->pi_stream_numbers )
{
p_ex->i_stream_number_count = 0;
return VLC_ENOMEM;
}
for( uint16_t i = 0; i < p_ex->i_stream_number_count; i++ )
{
if( !ASF_HAVE(2) )
break;
p_ex->pi_stream_numbers[i] = ASF_READ2();
if ( p_ex->pi_stream_numbers[i] > ASF_MAX_STREAMNUMBER )
{
free( p_ex->pi_stream_numbers );
return VLC_EGENERIC;
}
}
#ifdef ASF_DEBUG
msg_Dbg( s, "read \"bitrate exclusion object\" type %s",
p_ex->exclusion_type == LANGUAGE ? "Language" :
( p_ex->exclusion_type == BITRATE ) ? "Bitrate" : "Unknown"
);
for( uint16_t i = 0; i < p_ex->i_stream_number_count; i++ )
msg_Dbg( s, " - stream=%u", p_ex->pi_stream_numbers[i] );
#endif
return VLC_SUCCESS;
}
static void ASF_FreeObject_bitrate_mutual_exclusion( asf_object_t *p_obj)
{
asf_object_bitrate_mutual_exclusion_t *p_ex = &p_obj->bitrate_mutual_exclusion;
FREENULL( p_ex->pi_stream_numbers );
p_ex->i_stream_number_count = 0;
}
static int ASF_ReadObject_extended_content_description( stream_t *s,
asf_object_t *p_obj)
{
asf_object_extended_content_description_t *p_ec =
&p_obj->extended_content_description;
const uint8_t *p_peek, *p_data;
uint16_t i;
if( p_ec->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_ec->i_object_size );
if( i_peek < 26 )
return VLC_EGENERIC;
p_data = &p_peek[ASF_OBJECT_COMMON_SIZE];
p_ec->i_count = ASF_READ2();
p_ec->ppsz_name = calloc( p_ec->i_count, sizeof(char*) );
p_ec->ppsz_value = calloc( p_ec->i_count, sizeof(char*) );
if( !p_ec->ppsz_name || !p_ec->ppsz_value )
{
free( p_ec->ppsz_name );
free( p_ec->ppsz_value );
return VLC_ENOMEM;
}
for( i = 0; i < p_ec->i_count; i++ )
{
uint16_t i_size;
uint16_t i_type;
if( !ASF_HAVE(2 + 2+2) )
break;
p_ec->ppsz_name[i] = ASF_READS( ASF_READ2() );
/* Grrr */
i_type = ASF_READ2();
i_size = ASF_READ2();
if( i_type == ASF_METADATA_TYPE_STRING )
{
/* Unicode string */
p_ec->ppsz_value[i] = ASF_READS( i_size );
}
else if( i_type == ASF_METADATA_TYPE_BYTE )
{
/* Byte array */
static const char hex[16] = {'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
p_ec->ppsz_value[i] = malloc( 2*i_size + 1 );
if( p_ec->ppsz_value[i] )
{
char *psz_value = p_ec->ppsz_value[i];
for( int j = 0; j < i_size; j++ )
{
const uint8_t v = ASF_READ1();
psz_value[2*j+0] = hex[v>>4];
psz_value[2*j+1] = hex[v&0xf];
}
psz_value[2*i_size] = '\0';
}
}
else if( i_type == ASF_METADATA_TYPE_BOOL )
{
/* Bool */
p_ec->ppsz_value[i] = strdup( ASF_READ1() ? "true" : "false" );
ASF_SKIP(i_size-1);
}
else if( i_type == ASF_METADATA_TYPE_DWORD )
{
/* DWord */
if( asprintf( &p_ec->ppsz_value[i], "%u", ASF_READ4() ) == -1 )
p_ec->ppsz_value[i] = NULL;
}
else if( i_type == ASF_METADATA_TYPE_QWORD )
{
/* QWord */
if( asprintf( &p_ec->ppsz_value[i], "%"PRIu64, ASF_READ8() ) == -1 )
p_ec->ppsz_value[i] = NULL;
}
else if( i_type == ASF_METADATA_TYPE_WORD )
{
/* Word */
if( asprintf( &p_ec->ppsz_value[i], "%u", ASF_READ2() ) == -1 )
p_ec->ppsz_value[i] = NULL;
}
else
{
p_ec->ppsz_value[i] = NULL;
ASF_SKIP(i_size);
}
}
p_ec->i_count = i;
#ifdef ASF_DEBUG
msg_Dbg( s, "read \"extended content description object\"" );
for( i = 0; i < p_ec->i_count; i++ )
msg_Dbg( s, " - '%s' = '%s'",
p_ec->ppsz_name[i],
p_ec->ppsz_value[i] );
#endif
return VLC_SUCCESS;
}
static void ASF_FreeObject_extended_content_description( asf_object_t *p_obj)
{
asf_object_extended_content_description_t *p_ec =
&p_obj->extended_content_description;
for( uint16_t i = 0; i < p_ec->i_count; i++ )
{
FREENULL( p_ec->ppsz_name[i] );
FREENULL( p_ec->ppsz_value[i] );
}
FREENULL( p_ec->ppsz_name );
FREENULL( p_ec->ppsz_value );
}
static int ASF_ReadObject_marker(stream_t *s, asf_object_t *p_obj)
{
asf_object_marker_t *p_mk = (asf_object_marker_t *)p_obj;
const uint8_t *p_peek, *p_data;
if( p_mk->i_object_size > INT32_MAX )
return VLC_EGENERIC;
ssize_t i_peek = vlc_stream_Peek( s, &p_peek, p_mk->i_object_size );
if( i_peek < ASF_OBJECT_COMMON_SIZE )
return VLC_EGENERIC;
p_data = &p_peek[ASF_OBJECT_COMMON_SIZE];
if( !ASF_HAVE( 16+4+2+2 ) )
return VLC_EGENERIC;
ASF_GetGUID( &p_mk->i_reserved1, p_data );
ASF_SKIP( 16 );
p_mk->i_count = ASF_READ4();
p_mk->i_reserved2 = ASF_READ2();
p_mk->name = ASF_READS( ASF_READ2() );
if( p_mk->i_count > 0 )
{
p_mk->marker = calloc( p_mk->i_count,
sizeof( asf_marker_t ) );
if( !p_mk->marker )
{
free( p_mk->name );
return VLC_ENOMEM;
}
for( uint32_t i = 0; i < p_mk->i_count; i++ )
{
asf_marker_t *p_marker = &p_mk->marker[i];
if( !ASF_HAVE(8+8+2+4+4+4) )
break;
p_marker->i_offset = ASF_READ8();
p_marker->i_presentation_time = ASF_READ8();
p_marker->i_entry_length = ASF_READ2();
p_marker->i_send_time = ASF_READ4();
p_marker->i_flags = ASF_READ4();
p_marker->i_marker_description_length = ASF_READ4();
if( p_marker->i_marker_description_length <= (UINT32_MAX / 2) )
p_marker->p_marker_description = ASF_READS( p_marker->i_marker_description_length * 2 );
else
p_marker->i_marker_description_length = 0;
}
}
#ifdef ASF_DEBUG
msg_Dbg( s, "Read \"marker object\": %"PRIu32" chapters: %s", p_mk->i_count, p_mk->name );
for( unsigned i = 0; i < p_mk->i_count; i++ )
msg_Dbg( s, "New chapter named: %s", p_mk->marker[i].p_marker_description );
#endif
return VLC_SUCCESS;
}
static void ASF_FreeObject_marker( asf_object_t *p_obj)
{
asf_object_marker_t *p_mk = (asf_object_marker_t *)p_obj;
for( uint32_t i = 0; i < p_mk->i_count; i++ )
{
FREENULL( p_mk->marker[i].p_marker_description );
}
FREENULL( p_mk->marker );
FREENULL( p_mk->name );
}
static int ASF_ReadObject_Raw(stream_t *s, asf_object_t *p_obj)
{
VLC_UNUSED(s);
VLC_UNUSED(p_obj);
return VLC_SUCCESS;
}
/* */
static const struct ASF_Object_Function_entry
{
const vlc_guid_t *p_id;
int i_type;
int (*ASF_ReadObject_function)( stream_t *, asf_object_t *p_obj );
void (*ASF_FreeObject_function)( asf_object_t *p_obj );
} ASF_Object_Function [] =
{
{ &asf_object_header_guid, ASF_OBJECT_HEADER,
ASF_ReadObject_Header, ASF_FreeObject_Null },
{ &asf_object_data_guid, ASF_OBJECT_DATA,
ASF_ReadObject_Data, ASF_FreeObject_Null },
{ &asf_object_simple_index_guid, ASF_OBJECT_INDEX,
ASF_ReadObject_Index, ASF_FreeObject_Index },
{ &asf_object_file_properties_guid, ASF_OBJECT_FILE_PROPERTIES,
ASF_ReadObject_file_properties, ASF_FreeObject_Null },
{ &asf_object_stream_properties_guid, ASF_OBJECT_STREAM_PROPERTIES,
ASF_ReadObject_stream_properties,ASF_FreeObject_stream_properties },
{ &asf_object_header_extension_guid, ASF_OBJECT_HEADER_EXTENSION,
ASF_ReadObject_header_extension, ASF_FreeObject_header_extension},
{ &asf_object_metadata_guid, ASF_OBJECT_METADATA,
ASF_ReadObject_metadata, ASF_FreeObject_metadata},
{ &asf_object_codec_list_guid, ASF_OBJECT_CODEC_LIST,
ASF_ReadObject_codec_list, ASF_FreeObject_codec_list },
{ &asf_object_marker_guid, ASF_OBJECT_MARKER,
ASF_ReadObject_marker, ASF_FreeObject_marker },
{ &asf_object_padding, ASF_OBJECT_PADDING, NULL, NULL },
{ &asf_object_compatibility_guid, ASF_OBJECT_OTHER, NULL, NULL },
{ &asf_object_content_description_guid, ASF_OBJECT_CONTENT_DESCRIPTION,
ASF_ReadObject_content_description, ASF_FreeObject_content_description },
{ &asf_object_language_list, ASF_OBJECT_OTHER,
ASF_ReadObject_language_list, ASF_FreeObject_language_list },
{ &asf_object_stream_bitrate_properties, ASF_OBJECT_OTHER,
ASF_ReadObject_stream_bitrate_properties,
ASF_FreeObject_stream_bitrate_properties },
{ &asf_object_extended_stream_properties_guid, ASF_OBJECT_OTHER,
ASF_ReadObject_extended_stream_properties,
ASF_FreeObject_extended_stream_properties },
{ &asf_object_advanced_mutual_exclusion, ASF_OBJECT_OTHER,
ASF_ReadObject_advanced_mutual_exclusion,
ASF_FreeObject_advanced_mutual_exclusion },
{ &asf_object_stream_prioritization, ASF_OBJECT_OTHER,
ASF_ReadObject_stream_prioritization,
ASF_FreeObject_stream_prioritization },
{ &asf_object_bitrate_mutual_exclusion_guid, ASF_OBJECT_OTHER,
ASF_ReadObject_bitrate_mutual_exclusion,
ASF_FreeObject_bitrate_mutual_exclusion },
{ &asf_object_extended_content_description, ASF_OBJECT_OTHER,
ASF_ReadObject_extended_content_description,
ASF_FreeObject_extended_content_description },
{ &asf_object_content_encryption_guid, ASF_OBJECT_OTHER,
ASF_ReadObject_Raw, ASF_FreeObject_Null },
{ &asf_object_advanced_content_encryption_guid, ASF_OBJECT_OTHER,
ASF_ReadObject_Raw, ASF_FreeObject_Null },
{ &asf_object_extended_content_encryption_guid, ASF_OBJECT_OTHER,
ASF_ReadObject_Raw, ASF_FreeObject_Null },
};
static void ASF_ParentObject( asf_object_t *p_father, asf_object_t *p_obj )
{
if( p_father )
{
if( p_father->common.p_first )
{
p_father->common.p_last->common.p_next = p_obj;
}
else
{
p_father->common.p_first = p_obj;
}
p_father->common.p_last = p_obj;
}
}
static const struct ASF_Object_Function_entry * ASF_GetObject_Function( const vlc_guid_t *id )
{
for( size_t i = 0; i < ARRAY_SIZE(ASF_Object_Function); i++ )
{
if( guidcmp( ASF_Object_Function[i].p_id, id ) )
return &ASF_Object_Function[i];
}
return NULL;
}
static int ASF_ReadObject( stream_t *s, asf_object_t *p_obj,
asf_object_t *p_father )
{
int i_result = VLC_SUCCESS;
if( !p_obj )
return VLC_SUCCESS;
memset( p_obj, 0, sizeof( *p_obj ) );
if( ASF_ReadObjectCommon( s, p_obj ) )
{
msg_Warn( s, "cannot read one asf object at %"PRIu64, vlc_stream_Tell(s) );
return VLC_EGENERIC;
}
p_obj->common.p_father = p_father;
p_obj->common.p_first = NULL;
p_obj->common.p_next = NULL;
p_obj->common.p_last = NULL;
p_obj->common.i_type = 0;
if( p_obj->common.i_object_size < ASF_OBJECT_COMMON_SIZE )
{
msg_Warn( s, "found a corrupted asf object (size<24) at %"PRIu64, vlc_stream_Tell(s) );
return VLC_EGENERIC;
}
const struct ASF_Object_Function_entry *p_reader =
ASF_GetObject_Function( &p_obj->common.i_object_id );
if( p_reader )
{
p_obj->common.i_type = p_reader->i_type;
/* Now load this object */
if( p_reader->ASF_ReadObject_function != NULL )
i_result = p_reader->ASF_ReadObject_function( s, p_obj );
}
else
{
msg_Warn( s, "unknown asf object (not loaded): " GUID_FMT,
GUID_PRINT( p_obj->common.i_object_id ) );
}
/* link this object with father */
if ( i_result == VLC_SUCCESS )
ASF_ParentObject( p_father, p_obj );
return i_result;
}
static void ASF_FreeObject( stream_t *s, asf_object_t *p_obj )
{
asf_object_t *p_child;
if( !p_obj )
return;
/* Free all child object */
p_child = p_obj->common.p_first;
while( p_child )
{
asf_object_t *p_next;
p_next = p_child->common.p_next;
ASF_FreeObject( s, p_child );
p_child = p_next;
}
/* find this object */
const struct ASF_Object_Function_entry *p_entry =
ASF_GetObject_Function( &p_obj->common.i_object_id );
if( p_entry && p_entry->ASF_FreeObject_function )
{
/* Now free this object */
#ifdef ASF_DEBUG
msg_Dbg( s,
"freing asf object " GUID_FMT,
GUID_PRINT( p_obj->common.i_object_id ) );
#endif
p_entry->ASF_FreeObject_function( p_obj );
}
free( p_obj );
}
/*****************************************************************************
* ASF_ObjectDumpDebug:
*****************************************************************************/
static const struct
{
const vlc_guid_t *p_id;
const char *psz_name;
} ASF_ObjectDumpDebugInfo[] =
{
{ &vlc_object_root_guid, "Root" },
{ &asf_object_header_guid, "Header" },
{ &asf_object_data_guid, "Data" },
{ &asf_object_index_guid, "Index" },
{ &asf_object_simple_index_guid, "Simple Index" },
{ &asf_object_file_properties_guid, "File Properties" },
{ &asf_object_stream_properties_guid, "Stream Properties" },
{ &asf_object_content_description_guid, "Content Description" },
{ &asf_object_header_extension_guid, "Header Extension" },
{ &asf_object_metadata_guid, "Metadata" },
{ &asf_object_codec_list_guid, "Codec List" },
{ &asf_object_marker_guid, "Marker" },
{ &asf_object_stream_type_audio, "Stream Type Audio" },
{ &asf_object_stream_type_video, "Stream Type Video" },
{ &asf_object_stream_type_command, "Stream Type Command" },
{ &asf_object_language_list, "Language List" },
{ &asf_object_stream_bitrate_properties, "Stream Bitrate Properties" },
{ &asf_object_padding, "Padding" },
{ &asf_object_extended_stream_properties_guid, "Extended Stream Properties" },
{ &asf_object_advanced_mutual_exclusion, "Advanced Mutual Exclusion" },
{ &asf_object_stream_prioritization, "Stream Prioritization" },
{ &asf_object_bitrate_mutual_exclusion_guid, "Bitrate Mutual Exclusion" },
{ &asf_object_extended_content_description, "Extended content description"},
{ &asf_object_content_encryption_guid, "Content Encryption"},
{ &asf_object_advanced_content_encryption_guid, "Advanced Content Encryption"},
{ &asf_object_extended_content_encryption_guid, "Extended Content Encryption"},
/* Non Readable from this point */
{ &nonasf_object_index_placeholder_guid, "Index Placeholder"},
{ &nonasf_object_compatibility, "Object Compatibility"},
{ NULL, "Unknown" },
};
static void ASF_ObjectDumpDebug( vlc_object_t *p_obj,
asf_object_common_t *p_node, unsigned i_level )
{
unsigned i;
union asf_object_u *p_child;
const char *psz_name;
/* Find the name */
for( i = 0; ASF_ObjectDumpDebugInfo[i].p_id != NULL; i++ )
{
if( guidcmp( ASF_ObjectDumpDebugInfo[i].p_id,
&p_node->i_object_id ) )
break;
}
psz_name = ASF_ObjectDumpDebugInfo[i].psz_name;
char str[512];
if( i_level >= (sizeof(str) - 1)/5 )
return;
memset( str, ' ', sizeof( str ) );
for( i = 0; i < i_level; i++ )
{
str[i * 4] = '|';
}
snprintf( &str[4*i_level], sizeof(str) - 5*i_level,
"+ '%s'"
#ifdef ASF_DEBUG
"GUID "GUID_FMT" size:%"PRIu64" pos:%"PRIu64
#endif
, psz_name
#ifdef ASF_DEBUG
, GUID_PRINT( p_node->i_object_id ),
p_node->i_object_size, p_node->i_object_pos
#endif
);
msg_Dbg( p_obj, "%s", str );
for( p_child = p_node->p_first; p_child != NULL;
p_child = p_child->common.p_next )
{
ASF_ObjectDumpDebug( p_obj, &p_child->common, i_level + 1 );
}
}
/*****************************************************************************
* ASF_ReadObjetRoot : parse the entire stream/file
*****************************************************************************/
asf_object_root_t *ASF_ReadObjectRoot( stream_t *s, int b_seekable )
{
asf_object_root_t *p_root = malloc( sizeof( asf_object_root_t ) );
asf_object_t *p_obj;
uint64_t i_boundary = 0;
if( !p_root )
return NULL;
p_root->i_type = ASF_OBJECT_ROOT;
memcpy( &p_root->i_object_id, &vlc_object_root_guid, sizeof( vlc_guid_t ) );
p_root->i_object_pos = vlc_stream_Tell( s );
p_root->i_object_size = 0;
p_root->p_first = NULL;
p_root->p_last = NULL;
p_root->p_next = NULL;
p_root->p_hdr = NULL;
p_root->p_data = NULL;
p_root->p_fp = NULL;
p_root->p_index = NULL;
p_root->p_metadata = NULL;
for( ; ; )
{
p_obj = malloc( sizeof( asf_object_t ) );
if( !p_obj || ASF_ReadObject( s, p_obj, (asf_object_t*)p_root ) )
{
free( p_obj );
break;
}
switch( p_obj->common.i_type )
{
case( ASF_OBJECT_HEADER ):
if ( p_root->p_index || p_root->p_data || p_root->p_hdr ) break;
p_root->p_hdr = (asf_object_header_t*)p_obj;
break;
case( ASF_OBJECT_DATA ):
if ( p_root->p_index || p_root->p_data ) break;
p_root->p_data = (asf_object_data_t*)p_obj;
break;
case( ASF_OBJECT_INDEX ):
if ( p_root->p_index ) break;
p_root->p_index = (asf_object_index_t*)p_obj;
break;
default:
msg_Warn( s, "unknown top-level object found: " GUID_FMT,
GUID_PRINT( p_obj->common.i_object_id ) );
break;
}
/* Set a limit to avoid junk when possible */
if ( guidcmp( &p_obj->common.i_object_id, &asf_object_file_properties_guid ) )
{
i_boundary = p_obj->file_properties.i_file_size;
}
if( p_obj->common.i_type == ASF_OBJECT_DATA &&
p_obj->common.i_object_size <= 50 )
{
/* probably a dump of broadcasted asf */
break;
}
if( !b_seekable && p_root->p_hdr && p_root->p_data )
{
/* For unseekable stream it's enough to play */
break;
}
if( ASF_NextObject( s, p_obj, i_boundary ) ) /* Go to the next object */
break;
}
if( p_root->p_hdr != NULL && p_root->p_data != NULL )
{
p_root->p_fp = ASF_FindObject( p_root->p_hdr,
&asf_object_file_properties_guid, 0 );
if( p_root->p_fp )
{
asf_object_t *p_hdr_ext =
ASF_FindObject( p_root->p_hdr,
&asf_object_header_extension_guid, 0 );
if( p_hdr_ext )
{
p_root->p_metadata =
ASF_FindObject( p_hdr_ext,
&asf_object_metadata_guid, 0 );
}
ASF_ObjectDumpDebug( VLC_OBJECT(s),
(asf_object_common_t*)p_root, 0 );
return p_root;
}
msg_Warn( s, "cannot find file properties object" );
}
/* Invalid file */
ASF_FreeObjectRoot( s, p_root );
return NULL;
}
void ASF_FreeObjectRoot( stream_t *s, asf_object_root_t *p_root )
{
asf_object_t *p_obj;
p_obj = p_root->p_first;
while( p_obj )
{
asf_object_t *p_next;
p_next = p_obj->common.p_next;
ASF_FreeObject( s, p_obj );
p_obj = p_next;
}
free( p_root );
}
int ASF_CountObject( void *_p_obj, const vlc_guid_t *p_guid )
{
int i_count;
asf_object_t *p_child, *p_obj;
p_obj = (asf_object_t *)_p_obj;
if( !p_obj )
return 0;
i_count = 0;
p_child = p_obj->common.p_first;
while( p_child )
{
if( guidcmp( &p_child->common.i_object_id, p_guid ) )
i_count++;
p_child = p_child->common.p_next;
}
return i_count;
}
void *ASF_FindObject( void *_p_obj, const vlc_guid_t *p_guid,
int i_number )
{
asf_object_t *p_child, *p_obj;
p_obj = (asf_object_t *)_p_obj;
p_child = p_obj->common.p_first;
while( p_child )
{
if( guidcmp( &p_child->common.i_object_id, p_guid ) )
{
if( i_number == 0 )
return p_child;
i_number--;
}
p_child = p_child->common.p_next;
}
return NULL;
}