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diff --git a/blocks/src/lib/dummy_imbe_decoder.h b/blocks/src/lib/dummy_imbe_decoder.h
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+++ b/blocks/src/lib/dummy_imbe_decoder.h
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+/* -*- C++ -*- */
+
+/*
+ * Copyright 2008 Steve Glass
+ * 
+ * This file is part of OP25.
+ * 
+ * OP25 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 3, or (at your option)
+ * any later version.
+ * 
+ * OP25 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 OP25; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_DUMMY_IMBE_DECODER_H 
+#define INCLUDED_DUMMY_IMBE_DECODER_H 
+
+#include <imbe_decoder.h>
+
+/**
+ * dummy_imbe_decoder is the imbe_decoder of last resort. It consumes
+ * the voice_codeeword and does nothing.
+ */
+class dummy_imbe_decoder : public imbe_decoder {
+public:
+
+   /**
+    * dummy_imbe_decoder default constructor.
+    */
+   dummy_imbe_decoder();
+
+   /**
+    * dummy_imbe_decoder (virtual) destructor.
+    */
+   virtual ~dummy_imbe_decoder();
+
+   /**
+    * Ignores in_out and generates no audio.
+    *
+    * \param cw IMBE codewords and parity.
+    */
+   virtual void decode(const voice_codeword& cw);
+
+};
+
+#endif /* INCLUDED_DUMMY_IMBE_DECODER_H */