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diff --git a/intern/audaspace/SDL/AUD_SDLMixerReader.h b/intern/audaspace/SDL/AUD_SDLMixerReader.h
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+++ b/intern/audaspace/SDL/AUD_SDLMixerReader.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_SDLMIXERREADER
+#define AUD_SDLMIXERREADER
+
+#include "AUD_IReader.h"
+class AUD_Buffer;
+
+#include <SDL.h>
+
+/**
+ * This class mixes a sound source with help of the SDL library.
+ * Unfortunately SDL is only capable of 8 and 16 bit audio, mono and stereo, as
+ * well as resampling only 2^n sample rate relationships where n is a natural
+ * number.
+ * \warning Although SDL can only resample 2^n sample rate relationships, this
+ *          class doesn't check for compliance, so in case of other factors,
+ *          the behaviour is undefined.
+ */
+class AUD_SDLMixerReader : public AUD_IReader
+{
+private:
+	/**
+	 * The reader that is being mixed.
+	 */
+	AUD_IReader* m_reader;
+
+	/**
+	 * The current reading position in the resampling buffer.
+	 */
+	int m_rsposition;
+
+	/**
+	 * The count of mixed samples in the resampling buffer.
+	 */
+	int m_rssize;
+
+	/**
+	 * The smallest count of source samples to get a fractionless resampling
+	 * factor.
+	 */
+	int m_ssize;
+
+	/**
+	 * The smallest count of target samples to get a fractionless resampling
+	 * factor.
+	 */
+	int m_tsize;
+
+	/**
+	 * The sound output buffer.
+	 */
+	AUD_Buffer *m_buffer;
+
+	/**
+	 * The resampling buffer.
+	 */
+	AUD_Buffer *m_rsbuffer;
+
+	/**
+	 * The target specification.
+	 */
+	AUD_Specs m_tspecs;
+
+	/**
+	 * The sample specification of the source.
+	 */
+	AUD_Specs m_sspecs;
+
+	/**
+	 * Saves whether the end of the source has been reached.
+	 */
+	bool m_eor;
+
+	/**
+	 * The SDL_AudioCVT structure used for resampling.
+	 */
+	SDL_AudioCVT m_cvt;
+
+public:
+	/**
+	 * Creates a resampling reader.
+	 * \param reader The reader to mix.
+	 * \param specs The target specification.
+	 * \exception AUD_Exception Thrown if the source specification cannot be
+	 *            mixed to the target specification or if the reader is
+	 *            NULL.
+	 */
+	AUD_SDLMixerReader(AUD_IReader* reader, AUD_Specs specs);
+	/**
+	 * Destroys the reader.
+	 */
+	~AUD_SDLMixerReader();
+
+	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_SDLMIXERREADER