mirror of https://code.videolan.org/videolan/vlc
95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
/*****************************************************************************
|
|
* adf.c ADF stream filter
|
|
*****************************************************************************
|
|
* Copyright (C) 2016 VideoLAN Authors
|
|
*
|
|
* Author: Tristan Matthews <tmatth@videolan.org>
|
|
* Based on record.c by: Laurent Aimar <fenrir _AT_ videolan _DOT_ 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.
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Preamble
|
|
*****************************************************************************/
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <vlc_common.h>
|
|
#include <vlc_plugin.h>
|
|
#include <vlc_stream.h>
|
|
|
|
static int Open( vlc_object_t * );
|
|
|
|
vlc_module_begin()
|
|
set_shortname( "adf" )
|
|
set_subcategory( SUBCAT_INPUT_STREAM_FILTER )
|
|
set_capability( "stream_filter", 330 )
|
|
set_description( N_( "ADF stream filter" ) )
|
|
set_callback( Open )
|
|
vlc_module_end()
|
|
|
|
static int Control( stream_t *p_stream, int i_query, va_list args )
|
|
{
|
|
return vlc_stream_vaControl( p_stream->s, i_query, args );
|
|
}
|
|
|
|
static ssize_t Read( stream_t *s, void *buffer, size_t i_read )
|
|
{
|
|
const ssize_t i_ret = vlc_stream_Read( s->s, buffer, i_read );
|
|
if( i_ret < 1 ) return i_ret;
|
|
|
|
uint8_t *p_buffer = buffer;
|
|
static const uint8_t ADF_XOR_MASK = 34;
|
|
for( ssize_t i = 0; i < i_ret; ++i )
|
|
p_buffer[i] ^= ADF_XOR_MASK;
|
|
return i_ret;
|
|
}
|
|
|
|
static int Seek( stream_t *s, uint64_t offset )
|
|
{
|
|
return vlc_stream_Seek( s->s, offset );
|
|
}
|
|
|
|
static int Open( vlc_object_t *p_object )
|
|
{
|
|
stream_t *p_stream = (stream_t *)p_object;
|
|
|
|
/* Require .adf extension unless forced. */
|
|
if( !p_stream->obj.force )
|
|
{
|
|
if( !p_stream->psz_url )
|
|
return VLC_EGENERIC;
|
|
const char *psz_ext = strrchr( p_stream->psz_url, '.' );
|
|
if( !psz_ext || strncmp( psz_ext, ".adf", 4 ) )
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
const uint8_t *peek;
|
|
if( vlc_stream_Peek( p_stream->s, &peek, 3 ) < 3 )
|
|
return VLC_EGENERIC;
|
|
|
|
/* Probe for XOR'd ID3 tag. */
|
|
if( memcmp( peek, "\x6B\x66\x11", 3 ) )
|
|
return VLC_EGENERIC;
|
|
|
|
p_stream->pf_read = Read;
|
|
p_stream->pf_seek = Seek;
|
|
p_stream->pf_control = Control;
|
|
|
|
return VLC_SUCCESS;
|
|
}
|