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diff --git a/src/metadata/m4a/mp4isobox.h b/src/metadata/m4a/mp4isobox.h
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+++ b/src/metadata/m4a/mp4isobox.h
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+/***************************************************************************
+    copyright            : (C) 2002, 2003, 2006 by Jochen Issing
+    email                : jochen.issing@isign-softart.de
+ ***************************************************************************/
+
+/***************************************************************************
+ *   This library is free software; you can redistribute it and/or modify  *
+ *   it  under the terms of the GNU Lesser General Public License version  *
+ *   2.1 as published by the Free Software Foundation.                     *
+ *                                                                         *
+ *   This library 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     *
+ *   Lesser General Public License for more details.                       *
+ *                                                                         *
+ *   You should have received a copy of the GNU Lesser General Public      *
+ *   License along with this library; if not, write to the Free Software   *
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,            *
+ *   MA  02110-1301  USA                                                   *
+ ***************************************************************************/
+
+#ifndef MP4ISOBOX_H
+#define MP4ISOBOX_H
+
+#include "taglib.h"
+#include "mp4fourcc.h"
+
+namespace TagLib
+{
+  class File; 
+
+  namespace MP4
+  {
+    class Mp4IsoBox
+    {
+    public:
+      //! constructor for base class
+      Mp4IsoBox( TagLib::File* file, MP4::Fourcc fourcc, uint size, long offset );
+      //! destructor - simply freeing private ptr
+      virtual ~Mp4IsoBox();
+
+      //! function to get the fourcc code
+      MP4::Fourcc fourcc() const;
+      //! function to get the size of tha atom/box
+      uint size() const;
+      //! function to get the offset of the atom in the mp4 file
+      long offset() const;
+
+      //! parse wrapper to get common interface for both box and fullbox
+      virtual void  parsebox();
+      //! pure virtual function for all subclasses to implement
+      virtual void parse() = 0;
+
+    protected:
+      //! function to get the file pointer
+      TagLib::File* file() const;
+
+    protected:
+      class Mp4IsoBoxPrivate;
+      Mp4IsoBoxPrivate* d;
+    };
+
+  } // namespace MP4
+} // namespace TagLib
+
+#endif // MP4ISOBOX_H
+