AAFilter.h

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//
// Last changed  : $Date$
// File revision : $Revision$
//
// $Id$
//
//
// License :
//
//  SoundTouch audio processing library
//  Copyright (c) Olli Parviainen
//
//  This library 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 2.1 of the License, or (at your option) any later version.
//
//  This library 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 this library; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

#ifndef AAFilter_H
#define AAFilter_H

#include "STTypes.h"


class AAFilter
{
protected:
    class FIRFilter *pFIR;

    double cutoffFreq;

    uint length;

    void calculateCoeffs();
public:
    AAFilter(uint length);

    ~AAFilter();

    void setCutoffFreq(double newCutoffFreq);

    void setLength(uint newLength);

    uint getLength() const;

    uint evaluate(soundtouch::SAMPLETYPE *dest, 
                  const soundtouch::SAMPLETYPE *src, 
                  uint numSamples, 
                  uint numChannels) const;
};

#endif