CodecPlugin.h

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/*************************************************************************
          CodecPlugin.h  -  base class for codec plugins
                             -------------------
    begin                : Fri Dec 28 2012
    copyright            : (C) 2012 by Thomas Eschenbacher
    email                : Thomas.Eschenbacher@gmx.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 CODEC_PLUGIN_H
#define CODEC_PLUGIN_H

#include "config.h"

#include <QtGlobal>
#include <QList>

#include "libkwave/Plugin.h"

namespace Kwave
{
    class Decoder;
    class Encoder;

    class Q_DECL_EXPORT CodecPlugin: public Kwave::Plugin
    {
    public:

        typedef struct {
            int                     m_use_count; 
            QList<Kwave::Encoder *> m_encoder;   
            QList<Kwave::Decoder *> m_decoder;   
        } Codec;

        CodecPlugin(QObject *parent, const QVariantList &args, Codec &codec);

        virtual ~CodecPlugin() Q_DECL_OVERRIDE;

        virtual void load(QStringList &/* params */) Q_DECL_OVERRIDE;

        virtual void unload() Q_DECL_OVERRIDE;

        virtual QList<Kwave::Decoder *> createDecoder() = 0;

        virtual QList<Kwave::Encoder *> createEncoder() = 0;

    protected:

        template<class T> QList<Kwave::Decoder *> singleDecoder()
        {
            QList<Kwave::Decoder *> list;
            list.append(new(std::nothrow) T);
            return list;
        }

        template<class T> QList<Kwave::Encoder *> singleEncoder()
        {
            QList<Kwave::Encoder *> list;
            list.append(new(std::nothrow) T);
            return list;
        }

    private:

        Codec &m_codec;
    };
}

#define EMPTY_CODEC {0, QList<Kwave::Encoder *>(), QList<Kwave::Decoder *>() }

#endif /* CODEC_PLUGIN_H */

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