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/*
File: file_dpx.c
Copyright (C) 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_dpx)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_TIME_H
#include <time.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_dpx(file_stat_t *file_stat);
const file_hint_t file_hint_dpx= {
.extension="dpx",
.description="Cineon image file/SMTPE DPX",
.max_filesize=10*1024*1024,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_dpx
};
/* Header information from http://www.cineon.com/ff_draft.php */
struct header_dpx
{
uint32_t magic_num; /* magic number 0x53445058 (SDPX) or 0x58504453 (XPDS) */
uint32_t offset; /* offset to image data in bytes */
char vers[8]; /* which header format version is being used (v1.0)*/
uint32_t file_size; /* file size in bytes */
uint32_t ditto_key; /* read time short cut - 0 = same, 1 = new */
uint32_t gen_hdr_size; /* generic header length in bytes */
uint32_t ind_hdr_size; /* industry header length in bytes */
uint32_t user_data_size; /* user-defined data length in bytes */
char file_name[100]; /* image file name */
char create_time[24]; /* file creation date "yyyy:mm:dd:hh:mm:ss:LTZ" */
char creator[100]; /* file creator's name */
char project[200]; /* project name */
char copyright[200]; /* right to use or copyright info */
uint32_t key; /* encryption ( FFFFFFFF = unencrypted ) */
char Reserved[104]; /* reserved field TBD (need to pad) */
} __attribute__ ((gcc_struct, __packed__));
/*@
@ requires buffer_size >= sizeof(struct header_dpx);
@ requires separation: \separated(&file_hint_dpx, 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_dpx(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)
{
static const unsigned char ver10[8]= {'V', '1', '.', '0', 0x00, 0x00, 0x00, 0x00};
const struct header_dpx *dpx=(const struct header_dpx *)buffer;
const unsigned int file_size=be32(dpx->file_size);
if(memcmp(dpx->vers, ver10, sizeof(ver10))==0)
{
if(file_size < sizeof(struct header_dpx))
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_dpx.extension;
file_recovery_new->calculated_file_size=file_size;
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
file_recovery_new->time=get_time_from_YYYY_MM_DD_HH_MM_SS(dpx->create_time);
return 1;
}
return 0;
}
static void register_header_check_dpx(file_stat_t *file_stat)
{
register_header_check(0, "SDPX", 4, &header_check_dpx, file_stat);
#ifndef DISABLED_FOR_FRAMAC
register_header_check(0, "XPDS", 4, &header_check_dpx, file_stat);
#endif
}
#endif
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