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authorDmitry Brant <dbrant@wikimedia.org>2016-01-30 12:35:02 -0500
committerDmitry Brant <dbrant@wikimedia.org>2016-01-30 12:35:02 -0500
commitadbca173664d3839cf8d5217a1c8ac43a288b1b8 (patch)
tree5a1a5453ad88b2ada5858e958c51f97f17e2b053 /src/file_bpg.c
parentb7441965e19f4dc5a406e5525464a51d375aa3dd (diff)
Adding BPG format.
Diffstat (limited to 'src/file_bpg.c')
-rw-r--r--src/file_bpg.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/src/file_bpg.c b/src/file_bpg.c
new file mode 100644
index 0000000..eb7bd9c
--- /dev/null
+++ b/src/file_bpg.c
@@ -0,0 +1,91 @@
+/*
+
+ File: file_bpg.c
+
+ Copyright (C) 1998-2007 Christophe GRENIER <grenier@cgsecurity.org>
+ Contribution by Dmitry Brant <me@dmitrybrant.com>
+
+ 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"
+
+static void register_header_check_bpg(file_stat_t *file_stat);
+static int header_check_bpg(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_bpg= {
+ .extension="bpg",
+ .description="Better Portable Graphics (BPG) image",
+ .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+ .recover=1,
+ .enable_by_default=1,
+ .register_header_check=&register_header_check_bpg
+};
+
+static const unsigned char bpg_header[4]= {'B','P','G',0xFB};
+
+static void register_header_check_bpg(file_stat_t *file_stat)
+{
+ register_header_check(0, bpg_header, sizeof(bpg_header), &header_check_bpg, file_stat);
+}
+
+static int getue32(const unsigned char *buffer, const unsigned int buffer_size, unsigned int *buf_ptr)
+{
+ unsigned int value = 0;
+ unsigned int b;
+ int bitsRead = 0;
+ while (*buf_ptr < buffer_size)
+ {
+ b = buffer[*buf_ptr++];
+ value <<= 7;
+ value |= (b & 0x7F);
+ if ((b & 0x80) == 0)
+ break;
+ bitsRead += 7;
+ if (bitsRead >= 32)
+ break;
+ }
+ return value;
+}
+
+static int header_check_bpg(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)
+{
+ if(buffer[0]=='B' && buffer[1]=='P' && buffer[2]=='G' && buffer[3]==0xFB)
+ {
+ unsigned int buf_ptr = 6;
+ reset_file_recovery(file_recovery_new);
+ file_recovery_new->extension=file_hint_bpg.extension;
+ file_recovery_new->min_filesize=100;
+ // get image width, and throw it away
+ getue32(buffer, buffer_size, &buf_ptr);
+ // get image height, and throw it away
+ getue32(buffer, buffer_size, &buf_ptr);
+ file_recovery_new->calculated_file_size=(uint64_t)getue32(buffer, buffer_size, &buf_ptr);
+ file_recovery_new->data_check=&data_check_size;
+ file_recovery_new->file_check=&file_check_size;
+ return 1;
+ }
+ return 0;
+}