110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/*
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File: file_mrw.c
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Copyright (C) 1998-2005,2007 Christophe GRENIER <grenier@cgsecurity.org>
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This software is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write the Free Software Foundation, Inc., 51
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Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_mrw)
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include <stdio.h>
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#include "types.h"
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#include "common.h"
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#include "filegen.h"
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#include "log.h"
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/*@ requires valid_register_header_check(file_stat); */
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static void register_header_check_mrw(file_stat_t *file_stat);
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const file_hint_t file_hint_mrw= {
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.extension="mrw",
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.description="Minolta Raw picture",
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.max_filesize=PHOTOREC_MAX_FILE_SIZE,
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.recover=1,
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.enable_by_default=1,
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.register_header_check=®ister_header_check_mrw
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};
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struct hdr {
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uint32_t fourcc;
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uint32_t size;
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#if 0
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char data[0];
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#endif
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} __attribute__ ((gcc_struct, __packed__));
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struct prd {
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char ver[8];
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struct {
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uint16_t y;
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uint16_t x;
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} ccd;
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struct {
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uint16_t y;
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uint16_t x;
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} img;
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uint8_t datasize; // bpp, 12 or 16
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uint8_t pixelsize; // bits used, always 12
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uint8_t storagemethod; // 0x52 means not packed
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uint8_t unknown1;
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uint16_t unknown2;
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uint16_t pattern; // 0x0001 RGGB, or 0x0004 GBRG
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} __attribute__ ((gcc_struct, __packed__));
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/* Minolta */
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/*@
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@ requires buffer_size >= 2*sizeof(struct hdr) + sizeof(struct prd);
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@ requires separation: \separated(&file_hint_mrw, buffer+(..), file_recovery, file_recovery_new);
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@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
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@ ensures valid_header_check_result(\result, file_recovery_new);
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@ assigns *file_recovery_new;
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@*/
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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)
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{
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const unsigned char prd_header[4]= { 0x00,'P','R','D'};
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const struct hdr *mrmhdr = (const struct hdr*)buffer;
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const struct hdr *prdhdr = (const struct hdr*)&buffer[sizeof(struct hdr)];
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/* Picture Raw Dimensions */
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const struct prd *prd = (const struct prd*)&buffer[2*sizeof(struct hdr)];
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if(memcmp(&prdhdr->fourcc, prd_header, sizeof(prd_header))!=0)
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return 0;
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension=file_hint_mrw.extension;
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file_recovery_new->calculated_file_size= (uint64_t)be32(mrmhdr->size)+ 8 +
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((uint64_t)be16(prd->ccd.x) * be16(prd->ccd.y) * prd->datasize + 8 - 1) / 8;
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file_recovery_new->data_check=&data_check_size;
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file_recovery_new->file_check=&file_check_size;
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/*
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log_debug("size=%lu x=%lu y=%lu datasize=%lu\n", be32(mrmhdr->size),
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be16(prd->ccd.x), be16(prd->ccd.y), prd->datasize);
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log_debug("mrw_file_size %lu\n", (long unsigned)file_recovery_new->calculated_file_size);
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*/
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return 1;
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}
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static void register_header_check_mrw(file_stat_t *file_stat)
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{
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static const unsigned char mrw_header[4]= { 0x00,'M','R','M'}; /* Minolta Raw */
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register_header_check(0, mrw_header,sizeof(mrw_header), &header_check_mrw, file_stat);
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}
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#endif
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