blender/intern/audaspace/fftw/AUD_BandPassReader.h
Joerg Mueller ed4029d07a Sound:
* Fixed minor errors in AUD_BufferReader.cpp and AUD_LoopFactory.h
* Added a first version of a bandpass filter using fftw3
2009-12-28 10:15:35 +00:00

100 lines
2.1 KiB
C++

/*
* $Id$
*
* ***** 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