statehandler.h

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/***************************************************************************
 *   Copyright (C) 2008-2025 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 STATEHANDLER_H
#define STATEHANDLER_H

#include <QHash>
#if QT_VERSION < QT_VERSION_CHECK(5,14,0)
#  include <QMutex>
#else
#  include <QRecursiveMutex>
#endif
#include "abstractengine.h"
#include "audioparameters.h"

class QMMP_EXPORT StateHandler : public QObject
{
    Q_OBJECT
public:
    explicit StateHandler(QObject *parent = nullptr);
    ~StateHandler();

    void dispatch(qint64 elapsed, int bitrate);
    void dispatch(const AudioParameters &p);
    void dispatch(qint64 duration);
    bool dispatch(const TrackInfo &info);
    void dispatch(const QHash<QString, QString> &info);
    void dispatch(Qmmp::State state);
    void dispatchBuffer(int percent);
    qint64 elapsed() const;
    qint64 duration() const;
    int bitrate() const;
    AudioParameters audioParameters() const;
    Qmmp::State state() const;
    void sendNextTrackRequest();
    void sendFinished();
    static StateHandler* instance();

signals:
    void elapsedChanged(qint64 time);
    void bitrateChanged(int bitrate);
    void audioParametersChanged(const AudioParameters &p);
    void bufferingProgress(int progress);

private:
    qint64 m_elapsed = -1;
    qint64 m_duration = 0;
    bool m_sendAboutToFinish = true;
    int m_bitrate = 0;
    static StateHandler* m_instance;
    TrackInfo m_info;
    QHash<QString, QString> m_streamInfo;
    Qmmp::State m_state = Qmmp::Stopped;
    AudioParameters m_audioParameters;
#if QT_VERSION < QT_VERSION_CHECK(5,14,0)
    mutable QMutex m_mutex;
#else
    mutable QRecursiveMutex m_mutex;
#endif
};

#endif