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diff --git a/src/metadata/m4a/mp4propsproxy.h b/src/metadata/m4a/mp4propsproxy.h
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+/***************************************************************************
+    copyright            : (C) 2002, 2003, 2006 by Jochen Issing
+    email                : [email protected]
+ ***************************************************************************/
+
+/***************************************************************************
+ *   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 MP4PROPSPROXY_H
+#define MP4PROPSPROXY_H MP4PROPSPROXY_H
+#include "mp4mvhdbox.h"
+#include "mp4audiosampleentry.h"
+
+namespace TagLib
+{
+  namespace MP4
+  {
+    //! Mp4PropsProxy is used to access the stsd box and mvhd box directly
+    /*! this class works as a shortcut to avoid stepping through all parent boxes
+     *  to access the boxes in question
+     */
+    class Mp4PropsProxy
+    {
+    public:
+      //! constructor for properties proxy
+      Mp4PropsProxy();
+      //! destructor
+      ~Mp4PropsProxy();
+
+      //! function to get length of media in seconds
+      TagLib::uint seconds() const;
+      //! function to get the nunmber of channels
+      TagLib::uint channels() const;
+      //! function to get the sample rate
+      TagLib::uint sampleRate() const;
+      //! function to get the bitrate rate
+      TagLib::uint bitRate() const;
+
+      //! function to register the movie header box - mvhd
+      void registerMvhd( MP4::Mp4MvhdBox* mvhdbox );
+      //! function to register the sample description box
+      void registerAudioSampleEntry( MP4::Mp4AudioSampleEntry* audiosampleentry );
+
+    private:
+      class Mp4PropsProxyPrivate;
+      Mp4PropsProxyPrivate* d;
+      
+    }; // Mp4PropsProxy
+  } // MP4
+} // TagLib
+
+#endif // MP4PROPSPROXY_H