forked from bartvdbraak/blender
ed4029d07a
* Fixed minor errors in AUD_BufferReader.cpp and AUD_LoopFactory.h * Added a first version of a bandpass filter using fftw3
100 lines
2.1 KiB
C++
100 lines
2.1 KiB
C++
/*
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* $Id$
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*
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* ***** BEGIN LGPL LICENSE BLOCK *****
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*
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* Copyright 2009 Jörg Hermann Müller
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*
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* This file is part of AudaSpace.
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*
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* AudaSpace is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* AudaSpace is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with AudaSpace. If not, see <http://www.gnu.org/licenses/>.
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*
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* ***** END LGPL LICENSE BLOCK *****
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*/
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#ifndef AUD_BANDPASSREADER
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#define AUD_BANDPASSREADER
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#include <fftw3.h>
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#include "AUD_EffectReader.h"
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class AUD_Buffer;
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/**
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* This class only passes a specific frequency band of another reader.
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*/
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class AUD_BandPassReader : public AUD_EffectReader
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{
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private:
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/**
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* The playback buffer.
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*/
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AUD_Buffer *m_buffer;
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/**
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* The input buffer for fourier transformations.
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*/
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AUD_Buffer *m_in;
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/**
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* The output buffer for fourier transformations.
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*/
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AUD_Buffer *m_out;
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/**
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* The lowest passed frequency.
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*/
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float m_low;
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/**
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* The highest passed frequency.
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*/
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float m_high;
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/**
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* The fftw plan for forward transformation.
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*/
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fftw_plan m_forward;
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/**
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* The fftw plan for backward transformation.
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*/
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fftw_plan m_backward;
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/**
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* The length of the plans.
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*/
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int m_length;
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public:
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/**
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* Creates a new band pass reader.
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* \param reader The reader to read from.
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* \param low The lowest passed frequency.
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* \param high The highest passed frequency.
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* \exception AUD_Exception Thrown if the reader specified is NULL.
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*/
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AUD_BandPassReader(AUD_IReader* reader, float low, float high);
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/**
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* Destroys the reader.
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*/
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virtual ~AUD_BandPassReader();
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virtual AUD_ReaderType getType();
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virtual void read(int & length, sample_t* & buffer);
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};
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#endif //AUD_BANDPASSREADER
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