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/*
File: file_mrw.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_mrw)
#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"
#include "log.h"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_mrw(file_stat_t *file_stat);
const file_hint_t file_hint_mrw= {
.extension="mrw",
.description="Minolta Raw picture",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_mrw
};
struct hdr {
uint32_t fourcc;
uint32_t size;
#if 0
char data[0];
#endif
} __attribute__ ((gcc_struct, __packed__));
struct prd {
char ver[8];
struct {
uint16_t y;
uint16_t x;
} ccd;
struct {
uint16_t y;
uint16_t x;
} img;
uint8_t datasize; // bpp, 12 or 16
uint8_t pixelsize; // bits used, always 12
uint8_t storagemethod; // 0x52 means not packed
uint8_t unknown1;
uint16_t unknown2;
uint16_t pattern; // 0x0001 RGGB, or 0x0004 GBRG
} __attribute__ ((gcc_struct, __packed__));
/* Minolta */
/*@
@ requires buffer_size >= 2*sizeof(struct hdr) + sizeof(struct prd);
@ requires separation: \separated(&file_hint_mrw, 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_mrw(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 unsigned char prd_header[4]= { 0x00,'P','R','D'};
const struct hdr *mrmhdr = (const struct hdr*)buffer;
const struct hdr *prdhdr = (const struct hdr*)&buffer[sizeof(struct hdr)];
/* Picture Raw Dimensions */
const struct prd *prd = (const struct prd*)&buffer[2*sizeof(struct hdr)];
if(memcmp(&prdhdr->fourcc, prd_header, sizeof(prd_header))!=0)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_mrw.extension;
file_recovery_new->calculated_file_size= (uint64_t)be32(mrmhdr->size)+ 8 +
((uint64_t)be16(prd->ccd.x) * be16(prd->ccd.y) * prd->datasize + 8 - 1) / 8;
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
/*
log_debug("size=%lu x=%lu y=%lu datasize=%lu\n", be32(mrmhdr->size),
be16(prd->ccd.x), be16(prd->ccd.y), prd->datasize);
log_debug("mrw_file_size %lu\n", (long unsigned)file_recovery_new->calculated_file_size);
*/
return 1;
}
static void register_header_check_mrw(file_stat_t *file_stat)
{
static const unsigned char mrw_header[4]= { 0x00,'M','R','M'}; /* Minolta Raw */
register_header_check(0, mrw_header,sizeof(mrw_header), &header_check_mrw, file_stat);
}
#endif
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