filtermbe.h

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// Copyright (C) 2016 F4EXB                                                      //
// written by Edouard Griffiths                                                  //
//                                                                               //
// This program 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 as version 3 of the License, or                  //
// (at your option) any later version.                                           //
//                                                                               //
// This program 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 V3 for more details.                               //
//                                                                               //
// You should have received a copy of the GNU General Public License             //
// along with this program. If not, see <http://www.gnu.org/licenses/>.          //

#ifndef SDRBASE_DSP_FILTERMBE_H_
#define SDRBASE_DSP_FILTERMBE_H_

#include "iirfilter.h"
#include "export.h"

class SDRBASE_API MBEAudioInterpolatorFilter
{
public:
    MBEAudioInterpolatorFilter();
    ~MBEAudioInterpolatorFilter();

    void useHP(bool useHP) { m_useHP = useHP; }
    bool usesHP() const { return m_useHP; }
    float run(const float& sample);
    float runHP(const float& sample);
    float runLP(const float& sample);

private:
    IIRFilter<float, 2> m_filterLP;
    IIRFilter<float, 2> m_filterHP;
    bool m_useHP;
    // low pass coefficients
    static const float m_lpa[3];
    static const float m_lpb[3];
    // band pass coefficients
    static const float m_hpa[3];
    static const float m_hpb[3];
};


#endif /* SDRBASE_DSP_FILTERMBE_H_ */