blender/intern/audaspace/FX/AUD_HighpassReader.h
Joerg Mueller 174eccf078 Huge new year audio commit!
* Refactored the whole audaspace library to use float as sample format over all readers.
* Added new Readers like the linear resampler, envelope, lowpass, highpass and butterworth.
* Note: The butterworth filter isn't working correctly, some bug in there... Maybe also true for the envelope.
* Added a sound to f-curve operator that behaves mostly like the soundtracker script of technoestupido.
2010-01-01 05:09:30 +00:00

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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_HIGHPASSREADER
#define AUD_HIGHPASSREADER
#include "AUD_EffectReader.h"
class AUD_Buffer;
#define AUD_HIGHPASS_ORDER 3
/**
* This class represents a highpass filter.
*/
class AUD_HighpassReader : public AUD_EffectReader
{
private:
/**
* The playback buffer.
*/
AUD_Buffer *m_buffer;
/**
* The last out values buffer.
*/
AUD_Buffer *m_outvalues;
/**
* The last in values buffer.
*/
AUD_Buffer *m_invalues;
/**
* The position for buffer cycling.
*/
int m_position;
/**
* Filter coefficients.
*/
float m_coeff[2][AUD_HIGHPASS_ORDER];
public:
/**
* Creates a new highpass reader.
* \param reader The reader to read from.
* \param frequency The cutoff frequency.
* \param Q The Q factor.
* \exception AUD_Exception Thrown if the reader specified is NULL.
*/
AUD_HighpassReader(AUD_IReader* reader, float frequency, float Q);
/**
* Destroys the reader.
*/
virtual ~AUD_HighpassReader();
virtual void read(int & length, sample_t* & buffer);
};
#endif //AUD_HIGHPASSREADER