volumecontrol_p.h

/***************************************************************************
 *   Copyright (C) 2008-2019 by Ilya Kotov                                 *
 *   forkotov02@ya.ru                                                      *
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 *   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 for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 ***************************************************************************/
#ifndef VOLUMECONTROL_P_H
#define VOLUMECONTROL_P_H
 
#include <QObject>
#include "qmmp.h"
#include "volume.h"
#include "buffer.h"
 
class QTimer;
class SoftwareVolume;
 
class QMMP_EXPORT VolumeControl : public QObject
{
    Q_OBJECT
public:
    VolumeControl(QObject *parent = 0);
    ~VolumeControl();
    void setVolume(int left, int right);
    void changeVolume(int delta);
    void setVolume(int volume);
    void setBalance(int balance);
    int left() const;
    int right() const;
    int volume() const;
    int balance() const;
 
 
signals:
    void volumeChanged(int left, int right);
    void volumeChanged(int volume);
    void balanceChanged(int balance);
 
public slots:
    void checkVolume();
    void reload();
 
private:
    int m_left, m_right;
    bool m_prev_block;
    Volume *m_volume;
    QTimer *m_timer;
 
};
class SoftwareVolume : public Volume
{
public:
    SoftwareVolume();
    ~SoftwareVolume();
 
    void setVolume(const VolumeSettings &v);
    VolumeSettings volume() const;
    void changeVolume(Buffer *b, int chan);
 
    static SoftwareVolume *instance();
 
private:
    int m_left, m_right;
    double m_scaleLeft, m_scaleRight;
    static SoftwareVolume *m_instance;
};
 
#endif