174eccf078
* 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.
84 lines
1.8 KiB
C++
84 lines
1.8 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_LOWPASSREADER
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#define AUD_LOWPASSREADER
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#include "AUD_EffectReader.h"
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class AUD_Buffer;
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#define AUD_LOWPASS_ORDER 3
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/**
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* This class represents a lowpass filter.
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*/
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class AUD_LowpassReader : 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 last out values buffer.
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*/
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AUD_Buffer *m_outvalues;
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/**
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* The last in values buffer.
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*/
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AUD_Buffer *m_invalues;
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/**
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* The position for buffer cycling.
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*/
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int m_position;
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/**
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* Filter coefficients.
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*/
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float m_coeff[2][AUD_LOWPASS_ORDER];
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public:
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/**
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* Creates a new lowpass reader.
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* \param reader The reader to read from.
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* \param frequency The cutoff frequency.
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* \param Q The Q factor.
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* \exception AUD_Exception Thrown if the reader specified is NULL.
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*/
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AUD_LowpassReader(AUD_IReader* reader, float frequency, float Q);
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/**
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* Destroys the reader.
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*/
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virtual ~AUD_LowpassReader();
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virtual void read(int & length, sample_t* & buffer);
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};
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#endif //AUD_LOWPASSREADER
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