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diff --git a/src/gui/seqmanager/AudioSegmentMmapper.h b/src/gui/seqmanager/AudioSegmentMmapper.h
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+
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+
+    This program 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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _RG_AUDIOSEGMENTMMAPPER_H_
+#define _RG_AUDIOSEGMENTMMAPPER_H_
+
+#include "SegmentMmapper.h"
+
+
+class QString;
+
+
+namespace Rosegarden
+{
+
+class Segment;
+class RosegardenGUIDoc;
+
+
+class AudioSegmentMmapper : public SegmentMmapper
+{
+    friend class SegmentMmapperFactory;
+
+protected:
+    AudioSegmentMmapper(RosegardenGUIDoc*, Segment*,
+                        const QString& fileName);
+
+    virtual size_t computeMmappedSize();
+
+    /// dump all segment data in the file
+    virtual void dump();
+};
+
+//----------------------------------------
+
+
+}
+
+#endif