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authorChristophe Grenier <grenier@cgsecurity.org>2016-09-03 18:26:34 +0200
committerChristophe Grenier <grenier@cgsecurity.org>2016-09-03 18:26:34 +0200
commit6e2814fc0a5b055484227ca62ac93a8d9ecbdd6d (patch)
tree205843ae4117c428cac6b0fb70a7d5b3f339946a /src/file_x4a.c
parent67e7ee73953da02b0ebe180544b51a2cba8b38b3 (diff)
PhotoRec: recover Yamaha-YSFC .x4a files
Diffstat (limited to 'src/file_x4a.c')
-rw-r--r--src/file_x4a.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/src/file_x4a.c b/src/file_x4a.c
new file mode 100644
index 0000000..9122044
--- /dev/null
+++ b/src/file_x4a.c
@@ -0,0 +1,104 @@
+/*
+
+ File: file_ysfc100.c
+
+ Copyright (C) 2016 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"
+
+static void register_header_check_ysfc100(file_stat_t *file_stat);
+
+const file_hint_t file_hint_x4a= {
+ .extension="x4a",
+ .description="Yamaha-YSFC",
+ .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+ .recover=1,
+ .enable_by_default=1,
+ .register_header_check=&register_header_check_ysfc100
+};
+
+struct x4a_catalog
+{
+ char type[4];
+ uint32_t size;
+} __attribute__ ((gcc_struct, __packed__));
+
+static void file_check_x4a(file_recovery_t *fr)
+{
+ unsigned char buffer[0x200];
+ unsigned int i;
+ unsigned int fs=0x80;
+ fr->file_size = 0;
+ fr->offset_error=0;
+ fr->offset_ok=0;
+ if(my_fseek(fr->handle, 0, SEEK_SET) < 0 ||
+ fread(&buffer, sizeof(buffer), 1, fr->handle)!=1)
+ return;
+ for(i=0x80; i<0x200; i+=8)
+ {
+ const struct x4a_catalog *p=(const struct x4a_catalog *)&buffer[i];
+ if(be32(p->size) > fs)
+ fs=be32(p->size);
+ }
+ if(my_fseek(fr->handle, 0, SEEK_SET) < 0 ||
+ fread(&buffer, 8, 1, fr->handle)!=1)
+ return;
+ {
+ const struct x4a_catalog *p=(const struct x4a_catalog *)buffer;
+ fr->file_size=fs+be32(p->size);
+ }
+}
+
+static int header_check_ysfc100(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(memcmp(&buffer[0x10], "Ver 01.00", 8)!=0 ||
+ memcmp(&buffer[0x30], "YSFC", 4)!=0)
+ return 0;
+ reset_file_recovery(file_recovery_new);
+ if(memcmp(&buffer[6], "ALL", 3)==0)
+ file_recovery_new->extension=file_hint_x4a.extension;
+ else if(memcmp(&buffer[6], "SONG", 4)==0)
+ file_recovery_new->extension="x4s";
+ else if(memcmp(&buffer[6], "PATTERN", 7)==0)
+ file_recovery_new->extension="x4p";
+ else if(memcmp(&buffer[6], "ARPEGGIO", 8)==0)
+ file_recovery_new->extension="x4g";
+ else
+ file_recovery_new->extension=file_hint_x4a.extension;
+ file_recovery_new->min_filesize=0x200;
+ file_recovery_new->file_check=&file_check_x4a;
+ return 1;
+}
+
+static void register_header_check_ysfc100(file_stat_t *file_stat)
+{
+ static const unsigned char ysfc100_header[8]= {
+ 'Y' , 'S' , 'F' , 'C' , 0xff, 0xff, 0xff, 0xff
+ };
+ register_header_check(0x30, ysfc100_header, sizeof(ysfc100_header), &header_check_ysfc100, file_stat);
+}