/***************************************************************************
             Normalizer  -  simple normalizer with limiter
                             -------------------
    begin                : Sat May 09 2009
    copyright            : (C) 2009 by Thomas Eschenbacher
    email                : Thomas.Eschenbacher@gmx.de

    limiter function     : (C) 1999-2005 Chris Vaill <chrisvaill at gmail>
                           taken from "normalize-0.7.7"
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef NORMALIZER_H
#define NORMALIZER_H

#include "config.h"

#include <QObject>
#include <QVariant>

#include "libkwave/SampleArray.h"
#include "libkwave/SampleSource.h"

namespace Kwave
{
    class Normalizer: public Kwave::SampleSource
    {
        Q_OBJECT
    public:

        /** Constructor */
        Normalizer();

        /** Destructor */
        virtual ~Normalizer() Q_DECL_OVERRIDE;

        /** does the calculation */
        virtual void goOn() Q_DECL_OVERRIDE;

    signals:

        /** emits a block with the filtered data */
        void output(Kwave::SampleArray data);

    public slots:

        /** receives input data */
        void input(Kwave::SampleArray data);

        /**
         * Sets the gain of the amplifier [0...1]
         */
        void setGain(const QVariant g);

        /**
         * Sets the limiter level [linear, 0...1]
         */
        void setLimiterLevel(const QVariant l);

    private:

        /** buffer for input */
        Kwave::SampleArray m_buffer;

        /** gain */
        double m_gain;

        /** limiter level */
        double m_limit;

    };
}

#endif /* NORMALIZER_H */

//***************************************************************************
//***************************************************************************
