Simple PMP reader to parse Picasa's metadata

webkit/fileapi/media/picasa/pmp_constants.h

Index: webkit/fileapi/media/picasa/pmp_constants.h
diff --git a/webkit/fileapi/media/picasa/pmp_constants.h b/webkit/fileapi/media/picasa/pmp_constants.h
new file mode 100644
index 0000000000000000000000000000000000000000..0cd4b8ee57b2dd500a5bef56141614964722dee6
--- /dev/null
+++ b/webkit/fileapi/media/picasa/pmp_constants.h
@@ -0,0 +1,46 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WEBKIT_FILEAPI_MEDIA_PICASA_PMP_CONSTANTS_H_
+#define WEBKIT_FILEAPI_MEDIA_PICASA_PMP_CONSTANTS_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+
+namespace picasaimport {
+
+// PMP file format.
+// Info derived from: http://sbktech.blogspot.com/2011/12/picasa-pmp-format.html
+
+const char* const kPmpExtension = "pmp";
+
+const size_t kPmpHeaderSize = 20;
+
+const int kPmpMagic1Offset = 0;
+const int kPmpMagic2Offset = 6;
+const int kPmpMagic3Offset = 8;
+const int kPmpMagic4Offset = 14;
+
+const uint32 kPmpMagic1 = 0x3fcccccd;
+const uint16 kPmpMagic2 = 0x1332;
+const uint32 kPmpMagic3 = 0x00000002;
+const uint16 kPmpMagic4 = 0x1332;
+
+const int kPmpFieldType1Offset = 4;
+const int kPmpFieldType2Offset = 12;
+const int kPmpRowCountOffset   = 16;
+
+enum PmpFieldType {
+  PMP_STRING_TYPE   = 0x00,
+  PMP_UINT32_TYPE   = 0x01,
+  PMP_DOUBLE64_TYPE = 0x02,
+  PMP_UINT8_TYPE    = 0x03,
+  PMP_UINT64_TYPE   = 0x04,
+  PMP_INVALID_TYPE  = 0xff

[kinuko, 2013/04/10 02:27:54]

nit: it's fine if this fits other coding style in Media, but using a common
prefix rather than suffix looks more common (e.g. PMP_TYPE_XXX or
PMP_FIELD_TYPE_XXX).

[tommycli, 2013/04/10 18:32:42]

Done.

+};
+
+}  // namespace picasaimport
+
+#endif  // WEBKIT_FILEAPI_MEDIA_PICASA_PMP_CONSTANTS_H_