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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_SquareFactory.h"
#include "AUD_CallbackIIRFilterReader.h"
sample_t squareFilter(AUD_CallbackIIRFilterReader* reader, float* threshold)
{
float in = reader->x(0);
if(in >= *threshold)
return 1;
else if(in <= -*threshold)
return -1;
else
return 0;
}
void endSquareFilter(float* threshold)
{
delete threshold;
}
AUD_SquareFactory::AUD_SquareFactory(AUD_IFactory* factory, float threshold) :
AUD_EffectFactory(factory),
m_threshold(threshold)
{
}
float AUD_SquareFactory::getThreshold() const
{
return m_threshold;
}
AUD_IReader* AUD_SquareFactory::createReader() const
{
return new AUD_CallbackIIRFilterReader(getReader(), 1, 1,
(doFilterIIR) squareFilter,
(endFilterIIR) endSquareFilter,
new float(m_threshold));
}
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