AUD_SquareFactory.cpp

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * Copyright 2009-2011 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 General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Audaspace; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "AUD_SquareFactory.h"
#include "AUD_CallbackIIRFilterReader.h"

sample_t AUD_SquareFactory::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 AUD_SquareFactory::endSquareFilter(float* threshold)
{
    delete threshold;
}

AUD_SquareFactory::AUD_SquareFactory(AUD_Reference<AUD_IFactory> factory, float threshold) :
        AUD_EffectFactory(factory),
        m_threshold(threshold)
{
}

float AUD_SquareFactory::getThreshold() const
{
    return m_threshold;
}

AUD_Reference<AUD_IReader> AUD_SquareFactory::createReader()
{
    return new AUD_CallbackIIRFilterReader(getReader(), 1, 1,
                                           (doFilterIIR) squareFilter,
                                           (endFilterIIR) endSquareFilter,
                                           new float(m_threshold));
}