Sound:

* Fixed minor errors in AUD_BufferReader.cpp and AUD_LoopFactory.h
* Added a first version of a bandpass filter using fftw3

1 files changed, 99 insertions, 0 deletions

diff --git a/intern/audaspace/fftw/AUD_BandPassReader.h b/intern/audaspace/fftw/AUD_BandPassReader.h
new file mode 100644
index 00000000000..7a8fd3b94d5
--- /dev/null
+++ b/intern/audaspace/fftw/AUD_BandPassReader.h
@@ -0,0 +1,99 @@
+/*
+ * $Id$
+ *
+ * ***** 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_BANDPASSREADER
+#define AUD_BANDPASSREADER
+
+#include <fftw3.h>
+
+#include "AUD_EffectReader.h"
+class AUD_Buffer;
+
+/**
+ * This class only passes a specific frequency band of another reader.
+ */
+class AUD_BandPassReader : public AUD_EffectReader
+{
+private:
+	/**
+	 * The playback buffer.
+	 */
+	AUD_Buffer *m_buffer;
+
+	/**
+	 * The input buffer for fourier transformations.
+	 */
+	AUD_Buffer *m_in;
+
+	/**
+	 * The output buffer for fourier transformations.
+	 */
+	AUD_Buffer *m_out;
+
+	/**
+	 * The lowest passed frequency.
+	 */
+	float m_low;
+
+	/**
+	 * The highest passed frequency.
+	 */
+	float m_high;
+
+	/**
+	 * The fftw plan for forward transformation.
+	 */
+	fftw_plan m_forward;
+
+	/**
+	 * The fftw plan for backward transformation.
+	 */
+	fftw_plan m_backward;
+
+	/**
+	 * The length of the plans.
+	 */
+	int m_length;
+
+public:
+	/**
+	 * Creates a new band pass reader.
+	 * \param reader The reader to read from.
+	 * \param low The lowest passed frequency.
+	 * \param high The highest passed frequency.
+	 * \exception AUD_Exception Thrown if the reader specified is NULL.
+	 */
+	AUD_BandPassReader(AUD_IReader* reader, float low, float high);
+
+	/**
+	 * Destroys the reader.
+	 */
+	virtual ~AUD_BandPassReader();
+
+	virtual AUD_ReaderType getType();
+	virtual void read(int & length, sample_t* & buffer);
+};
+
+#endif //AUD_BANDPASSREADER