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/*
File: file_wtv.c
Copyright (C) 2011 Christophe GRENIER <grenier@cgsecurity.org>
This software is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_wtv)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "filegen.h"
#include "common.h"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_wtv(file_stat_t *file_stat);
const file_hint_t file_hint_wtv = {
.extension = "wtv",
.description = "Windows Media Center TV",
.max_filesize = PHOTOREC_MAX_FILE_SIZE,
.recover = 1,
.enable_by_default = 1,
.register_header_check = ®ister_header_check_wtv
};
/*@
@ requires buffer_size >= 0x60;
@ requires separation: \separated(&file_hint_wtv, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures valid_header_check_result(\result, file_recovery_new);
@*/
static int header_check_wtv(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{
const uint32_t *block_ptr = (const uint32_t *)(&buffer[0x5c]);
const uint32_t block = le32(*block_ptr);
if(block == 0)
return 0;
if(file_recovery->file_stat != NULL && file_recovery->file_stat->file_hint == &file_hint_wtv && file_recovery->file_size <= 0x3000)
{
if(header_ignored_adv(file_recovery, file_recovery_new) == 0)
return 0;
}
reset_file_recovery(file_recovery_new);
file_recovery_new->extension = file_hint_wtv.extension;
file_recovery_new->calculated_file_size=(uint64_t)block<<12;
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
return 1;
}
static void register_header_check_wtv(file_stat_t *file_stat)
{
static const unsigned char wtv_header[16] = {
0xb7, 0xd8, 0x00, ' ', '7', 'I', 0xda, 0x11,
0xa6, 'N', 0x00, 0x07, 0xe9, 0x5e, 0xad, 0x8d
};
register_header_check(0, wtv_header, sizeof(wtv_header), &header_check_wtv, file_stat);
}
#endif
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