qffmpegplaybackengineobject_p.h

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QFFMPEGPLAYBACKENGINEOBJECT_P_H
#define QFFMPEGPLAYBACKENGINEOBJECT_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include <QtCore/qatomic.h>
#include <QtCore/qthread.h>
#include <QtMultimedia/qmediaplayer.h>
#include <QtFFmpegMediaPluginImpl/private/qffmpegplaybackenginedefs_p.h>
 
#include <chrono>
 
QT_BEGIN_NAMESPACE
 
class QTimer;
 
namespace QFFmpeg {
 
class PlaybackEngineObject : public QObject
{
    Q_OBJECT
public:
    using TimePoint = std::chrono::steady_clock::time_point;
    using TimePointOpt = std::optional<TimePoint>;
    using Id = quint64;
 
    PlaybackEngineObject();
 
    ~PlaybackEngineObject() override;
 
    bool isPaused() const;
 
    bool isAtEnd() const;
 
    void kill();
 
    void setPaused(bool isPaused);
 
    Id id() const;
 
signals:
    void atEnd();
 
    void error(QMediaPlayer::Error, const QString &errorString);
 
protected:
    QTimer &timer();
 
    void scheduleNextStep(bool allowDoImmediatelly = true);
 
    virtual void onPauseChanged();
 
    virtual bool canDoNextStep() const;
 
    virtual std::chrono::milliseconds timerInterval() const;
 
    void setAtEnd(bool isAtEnd);
 
    virtual void doNextStep() { }
 
private slots:
    void onTimeout();
 
private:
    std::unique_ptr<QTimer> m_timer;
 
    QAtomicInteger<bool> m_paused = true;
    QAtomicInteger<bool> m_atEnd = false;
    QAtomicInteger<bool> m_deleting = false;
    const Id m_id;
};
} // namespace QFFmpeg
 
QT_END_NAMESPACE
 
#endif // QFFMPEGPLAYBACKENGINEOBJECT_P_H