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/*
File: file_au.c
Copyright (C) 1998-2005,2007 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_au)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "common.h"
#include "filegen.h"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_au(file_stat_t *file_stat);
const file_hint_t file_hint_au= {
.extension="au",
.description="Sun/NeXT audio data",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_au
};
/* http://en.wikipedia.org/wiki/Au_file_format */
struct header_au_s
{
uint32_t magic;
uint32_t offset;
uint32_t size;
uint32_t encoding;
uint32_t sample_rate;
uint32_t channels;
} __attribute__ ((gcc_struct, __packed__));
/*@
@ requires buffer_size > sizeof(struct header_au_s);
@ requires separation: \separated(&file_hint_au, 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);
@ assigns *file_recovery_new;
@*/
static int header_check_au(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 struct header_au_s *au=(const struct header_au_s *)buffer;
const unsigned int offset=be32(au->offset);
const unsigned int size=be32(au->size);
if(offset >= sizeof(struct header_au_s) &&
be32(au->encoding)>0 && be32(au->encoding)<=27 &&
be32(au->channels)>0 && be32(au->channels)<=256)
{
if(size!=0xffffffff)
{
const uint64_t cfs=(uint64_t)offset + size;
if(cfs < 111)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->min_filesize=111;
file_recovery_new->extension=file_hint_au.extension;
file_recovery_new->calculated_file_size=cfs;
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
return 1;
}
reset_file_recovery(file_recovery_new);
file_recovery_new->min_filesize=111;
file_recovery_new->extension=file_hint_au.extension;
return 1;
}
return 0;
}
static void register_header_check_au(file_stat_t *file_stat)
{
static const unsigned char au_header[4]= {'.','s','n','d'};
register_header_check(0, au_header,sizeof(au_header), &header_check_au, file_stat);
}
#endif
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