PhotoRec: recover Yamaha-YSFC .x4a files

3 files changed, 107 insertions, 0 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 4aa1a193..9095a5ca 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -328,6 +328,7 @@ file_C			= filegen.c \
 			  file_wtv.c \
 			  file_wv.c \
 			  file_x3f.c \
+			  file_x4a.c \
 			  file_xar.c \
 			  file_xcf.c \
 			  file_xfi.c \
diff --git a/src/file_list.c b/src/file_list.c
index 88c52af9..2d57c033 100644
--- a/src/file_list.c
+++ b/src/file_list.c
@@ -333,6 +333,7 @@ extern const file_hint_t file_hint_wpd;
 extern const file_hint_t file_hint_wtv;
 extern const file_hint_t file_hint_wv;
 extern const file_hint_t file_hint_x3f;
+extern const file_hint_t file_hint_x4a;
 extern const file_hint_t file_hint_xar;
 extern const file_hint_t file_hint_xcf;
 extern const file_hint_t file_hint_xfi;
@@ -656,6 +657,7 @@ file_enable_t list_file_enable[]=
   { .enable=0, .file_hint=&file_hint_wtv  },
   { .enable=0, .file_hint=&file_hint_wv   },
   { .enable=0, .file_hint=&file_hint_x3f  },
+  { .enable=0, .file_hint=&file_hint_x4a  },
   { .enable=0, .file_hint=&file_hint_xar  },
   { .enable=0, .file_hint=&file_hint_xcf  },
   { .enable=0, .file_hint=&file_hint_xfi  },
diff --git a/src/file_x4a.c b/src/file_x4a.c
new file mode 100644
index 00000000..91220445
--- /dev/null
+++ b/src/file_x4a.c
@@ -0,0 +1,104 @@
+/*
+
+    File: file_ysfc100.c
+
+    Copyright (C) 2016 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"
+#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);
+}