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diff --git a/intern/audaspace/FX/AUD_DoubleReader.h b/intern/audaspace/FX/AUD_DoubleReader.h
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+++ b/intern/audaspace/FX/AUD_DoubleReader.h
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+/*
+ * $Id$
+ *
+ * ***** BEGIN LGPL LICENSE BLOCK *****
+ *
+ * Copyright 2009 Jörg Hermann Müller
+ *
+ * This file is part of AudaSpace.
+ *
+ * AudaSpace is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * AudaSpace 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 AudaSpace.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * ***** END LGPL LICENSE BLOCK *****
+ */
+
+#ifndef AUD_DOUBLEREADER
+#define AUD_DOUBLEREADER
+
+#include "AUD_IReader.h"
+class AUD_Buffer;
+
+/**
+ * This reader plays two readers with the same specs sequently.
+ */
+class AUD_DoubleReader : public AUD_IReader
+{
+private:
+	/**
+	 * The first reader.
+	 */
+	AUD_IReader* m_reader1;
+
+	/**
+	 * The second reader.
+	 */
+	AUD_IReader* m_reader2;
+
+	/**
+	 * Whether we've reached the end of the first reader.
+	 */
+	bool m_finished1;
+
+	/**
+	 * The playback buffer for the intersecting part.
+	 */
+	AUD_Buffer* m_buffer;
+
+public:
+	/**
+	 * Creates a new ping pong reader.
+	 * \param reader1 The first reader to read from.
+	 * \param reader2 The second reader to read from.
+	 * \exception AUD_Exception Thrown if one of the reader specified is NULL
+	 *             or the specs from the readers differ.
+	 */
+	AUD_DoubleReader(AUD_IReader* reader1, AUD_IReader* reader2);
+
+	/**
+	 * Destroys the reader.
+	 */
+	virtual ~AUD_DoubleReader();
+
+	virtual bool isSeekable();
+	virtual void seek(int position);
+	virtual int getLength();
+	virtual int getPosition();
+	virtual AUD_Specs getSpecs();
+	virtual AUD_ReaderType getType();
+	virtual bool notify(AUD_Message &message);
+	virtual void read(int & length, sample_t* & buffer);
+};
+
+#endif //AUD_DOUBLEREADER