First version in git

1 files changed, 85 insertions, 0 deletions

diff --git a/src/file_mpg.c b/src/file_mpg.c
new file mode 100644
index 00000000..948d871d
--- /dev/null
+++ b/src/file_mpg.c
@@ -0,0 +1,85 @@
+/*
+
+    File: file_mpg.c
+
+    Copyright (C) 1998-2005,2007 Christophe GRENIER <[email protected]>
+  
+    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"
+
+
+static void register_header_check_mpg(file_stat_t *file_stat);
+static int header_check_mpg(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_mpg= {
+  .extension="mpg",
+  .description="Moving Picture Experts Group video",
+  .min_header_distance=0,
+  .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+  .recover=1,
+  .header_check=&header_check_mpg,
+  .register_header_check=&register_header_check_mpg
+};
+
+static const unsigned char mpg_header[3]= {0x00, 0x00, 0x01};
+
+static void register_header_check_mpg(file_stat_t *file_stat)
+{
+  register_header_check(0, mpg_header,sizeof(mpg_header), &header_check_mpg, file_stat);
+}
+
+static int header_check_mpg(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(file_recovery!=NULL && file_recovery->file_stat!=NULL && file_recovery->file_stat->file_hint==&file_hint_mpg)
+    return 0;
+  /* ISO/IEC 11172/13818-1 SYSTEM MULTIPLEXED PACKETIZED ELEMENTARY	*
+   * STREAM AND HEADERS							*
+   * 0x000001BA pack header start code			 		*
+   * 0x000001BB system header start code				*
+   * 0x000001BE padding block start code				*
+   * 0x000001BD private 1 block start code				*
+   * 0x000001BF private 2 block start code				*
+   * 									*
+   * ISO/IEC 11172-2/13818-2 (MPEG-1/2 video) ELEMENTARY VIDEO HEADER	*
+   * 0x000001B3	video sequence start code				*
+   * 0x000001B2	video user meta data start code				*
+   * 									*
+   * ISO/IEC 14496-2 (MPEG-4 video) ELEMENTARY VIDEO HEADER		*
+   * 0x000001B0	visual object sequence start code			*
+   * 0x000001B2 user meta data start code				*
+   * 0x000001B5 visual object start code				*/
+
+  if(buffer[0]==0x00 && buffer[1]==0x00 && buffer[2]==0x01 &&
+      (buffer[3]==0xB0 || buffer[3]==0xB3 || buffer[3]==0xB5 || buffer[3]==0xBA || buffer[3]==0xBB))
+  {
+    reset_file_recovery(file_recovery_new);
+    file_recovery_new->extension=file_hint_mpg.extension;
+    return 1;
+  }
+  return 0;
+}
+
+