/*

    File: file_x3f.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.

 */

#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"

extern const file_hint_t file_hint_x3i;
static void register_header_check_x3f(file_stat_t *file_stat);
static int header_check_x3f(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 file_hint_t file_hint_x3f= {
  .extension="x3f",
  .description="Sigma/Foveon X3 raw picture",
  .max_filesize=PHOTOREC_MAX_FILE_SIZE,
  .recover=1,
  .enable_by_default=1,
  .register_header_check=&register_header_check_x3f
};

struct x3f_header
{
  uint32_t	id;
  uint32_t	version;
  unsigned char uuid[16];
  uint32_t	mark;
  uint32_t	columns;
  uint32_t	rows;
  uint32_t	rotation;
  /* version 2.1 and later have additional fields */
} __attribute__ ((gcc_struct, __packed__));

static int header_check_x3f(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 x3f_header *h=(const struct x3f_header *)buffer;
  const unsigned int rotation=le32(h->rotation);
  if(le32(h->rows)==0 || le32(h->columns)==0)
    return 0;
  if(rotation!=0 && rotation!=90 && rotation!=180 && rotation!=270)
    return 0;
  if(file_recovery->file_stat!=NULL &&
      file_recovery->file_stat->file_hint==&file_hint_x3i &&
      safe_header_only==0)
  {
    return 0;
  }
  reset_file_recovery(file_recovery_new);
  file_recovery_new->extension=file_hint_x3f.extension;
  file_recovery_new->min_filesize=1024;
  return 1;
}

static void register_header_check_x3f(file_stat_t *file_stat)
{
  static const unsigned char x3f_header[4]= {'F','O','V','b'};
  register_header_check(0, x3f_header,sizeof(x3f_header), &header_check_x3f, file_stat);
}