/***************************************************************************
       PlayBackPlugin.h  -  plugin for playback and playback configuration
                             -------------------
    begin                : Sun May 13 2001
    copyright            : (C) 2001 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 PLAY_BACK_PLUGIN_H
#define PLAY_BACK_PLUGIN_H

#include "config.h"

#include <QMutex>
#include <QPointer>
#include <QString>

#include "libkwave/PlayBackParam.h"
#include "libkwave/PlaybackDeviceFactory.h"
#include "libkwave/Plugin.h"
#include "libkwave/Sample.h"

namespace Kwave
{
    class PlaybackController;
    class PlayBackDevice;
    class PlayBackDialog;
    class SampleSink;

    class PlayBackPlugin :public Kwave::Plugin,
                          public Kwave::PlaybackDeviceFactory
    {
        Q_OBJECT
    public:

        /**
         * Constructor
         * @param parent reference to our plugin manager
         * @param args argument list [unused]
         */
        PlayBackPlugin(QObject *parent, const QVariantList &args);

        /** Destructor */
        ~PlayBackPlugin() override;

        /**
         * Gets called when the plugin is first loaded and connects itself
         * to the playback controller and the current signal.
         */
        void load(QStringList &params) override;

        /**
         * Gets called before the plugin is unloaded.
         */
        void unload() override;

        /** @see Kwave::Plugin::setup() */
        virtual QStringList *setup(QStringList &previous_params)
            override;

        /**
         * Starts a playback test sequence
         * @param params list of strings with parameters (unused)
         */
        void run(QStringList params) override;

    signals:

        /** emits the progress of the playback test, from thread context */
        void sigTestProgress(int percent);

    public slots:

        /**
         * Plays a sample sound for testing the playback
         */
        void testPlayBack();

    protected:

        /**
         * Interpretes a given parameter list and sets up internal
         * parameters accordingly.
         * @param params reference to a QStringList with parameters
         * @return the detected playback parameters
         */
        Kwave::PlayBackParam interpreteParameters(QStringList &params);

        /**
         * Create a playback device matching the given playback method.
         * @param method a playback_method_t (aRts, ALSA, OSS...)
         * @return a new PlayBackDevice or 0 if failed
         */
        virtual Kwave::PlayBackDevice *createDevice(
            Kwave::playback_method_t method) override;

        /**
         * Returns a list of supported playback methods.
         * @return list of all supported playback methods, should not contain
         *         "any" or "invalid"
         */
        virtual QList<Kwave::playback_method_t> supportedMethods()
            override;

    private:

        /** dialog for the playback setup */
        QPointer<Kwave::PlayBackDialog> m_dialog;

        /** reference to the playback controller */
        Kwave::PlaybackController &m_playback_controller;

        /** sample sink, for playback test */
        Kwave::SampleSink *m_playback_sink;
    };
}

#endif /* PLAY_BACK_PLUGIN_H */

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