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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 *****
*/
#include "AUD_AccumulatorFactory.h"
#include "AUD_CallbackIIRFilterReader.h"
sample_t accumulatorFilterAdditive(AUD_CallbackIIRFilterReader* reader, void* useless)
{
float in = reader->x(0);
float lastin = reader->x(-1);
float out = reader->y(-1) + in - lastin;
if(in > lastin)
out += in - lastin;
return out;
}
sample_t accumulatorFilter(AUD_CallbackIIRFilterReader* reader, void* useless)
{
float in = reader->x(0);
float lastin = reader->x(-1);
float out = reader->y(-1);
if(in > lastin)
out += in - lastin;
return out;
}
AUD_AccumulatorFactory::AUD_AccumulatorFactory(AUD_IFactory* factory,
bool additive) :
AUD_EffectFactory(factory),
m_additive(additive)
{
}
AUD_IReader* AUD_AccumulatorFactory::createReader() const
{
return new AUD_CallbackIIRFilterReader(getReader(), 2, 2,
m_additive ? accumulatorFilterAdditive : accumulatorFilter);
}
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