soundcore.h

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/***************************************************************************
 *   Copyright (C) 2006-2025 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 SOUNDCORE_H
#define SOUNDCORE_H

#include <QQueue>
#include "decoder.h"
#include "output.h"
#include "visual.h"
#include "audioparameters.h"
#include "eqsettings.h"
#include "trackinfo.h"

class VolumeHandler;
class AbstractEngine;
class InputSource;
class StateHandler;

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

    qint64 duration() const;
    EqSettings eqSettings() const;
    void setEqSettings(const EqSettings &settings);
    int leftVolume() const;
    int rightVolume() const;
    int volume() const;
    int balance() const;
    bool isMuted() const;
    qint64 elapsed() const;
    int bitrate() const;
    AudioParameters audioParameters() const;
    Qmmp::State state() const;
    const QMap<Qmmp::MetaData, QString> &metaData() const;
    QString metaData(Qmmp::MetaData key) const;
    const QHash<QString, QString> &streamInfo() const;
    const TrackInfo &trackInfo() const;
    bool nextTrackAccepted() const;
    QString path() const;
    static SoundCore* instance();

public slots:
    void setVolumePerChannel(int left, int right);
    void setMuted(bool mute);
    void changeVolume(int delta);
    void setVolume(int volume);
    void volumeUp();
    void volumeDown();
    void setBalance(int balance);
    bool play(const QString &source, bool queue = false, qint64 offset = -1);
    void stop();
    void pause();
    void seek(qint64 time);
    void seekRelative(qint64 offset);

signals:
    void bufferingProgress(int progress);
    void elapsedChanged(qint64 time);
    void bitrateChanged(int bitrate);
    void audioParametersChanged(const AudioParameters &p);
    void streamInfoChanged();
    void trackInfoChanged();
    void stateChanged(Qmmp::State newState);
    void finished();
    void mutedChanged(bool muted);
    void volumeChanged(int volume);
    void balanceChanged(int balance);
    void eqSettingsChanged();
    void nextTrackRequest();

private slots:
    void startNextSource();
    void startNextEngine();

private:
    virtual bool event(QEvent *e) override final;

    enum NextEngineState
    {
        NO_ENGINE = 0,
        SAME_ENGINE,
        ANOTHER_ENGINE,
        INVALID_SOURCE
    };

    QHash<QString, QString> m_streamInfo;
    TrackInfo m_info;
    QString m_path;
    static SoundCore* m_instance;
    StateHandler *m_handler = nullptr;
    VolumeHandler *m_volumeControl = nullptr;
    AbstractEngine *m_engine = nullptr;
    QQueue<InputSource *> m_sources;
    NextEngineState m_nextState = NO_ENGINE;

};

#endif