forked from bartvdbraak/blender
52ef66da4d
* Created awesome filter classes :) * Made all filter effects use the filter classes instead of having the same implementation everywhere. * Added a Python API for LTI IIR filters. * Fixed a warning in creator.c that was introduced when adding game autoplay.
61 lines
1.7 KiB
C++
61 lines
1.7 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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#include "AUD_AccumulatorFactory.h"
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#include "AUD_CallbackIIRFilterReader.h"
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sample_t accumulatorFilterAdditive(AUD_CallbackIIRFilterReader* reader, void* useless)
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{
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float in = reader->x(0);
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float lastin = reader->x(-1);
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float out = reader->y(-1) + in - lastin;
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if(in > lastin)
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out += in - lastin;
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return out;
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}
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sample_t accumulatorFilter(AUD_CallbackIIRFilterReader* reader, void* useless)
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{
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float in = reader->x(0);
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float lastin = reader->x(-1);
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float out = reader->y(-1);
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if(in > lastin)
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out += in - lastin;
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return out;
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}
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AUD_AccumulatorFactory::AUD_AccumulatorFactory(AUD_IFactory* factory,
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bool additive) :
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AUD_EffectFactory(factory),
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m_additive(additive)
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{
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}
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AUD_IReader* AUD_AccumulatorFactory::createReader() const
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{
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return new AUD_CallbackIIRFilterReader(getReader(), 2, 2,
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m_additive ? accumulatorFilterAdditive : accumulatorFilter);
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}
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