avfdisplaylink_p.h

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// Copyright (C) 2016 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 AVFDISPLAYLINK_H

#define AVFDISPLAYLINK_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/qobject.h>

#include <atomic>

#import <QuartzCore/CADisplayLink.h>

#if !defined(QT_PLATFORM_UIKIT)

#include <QuartzCore/CVDisplayLink.h>

#endif

@class QT_MANGLE_NAMESPACE(DisplayLinkObserver);

QT_BEGIN_NAMESPACE

class AVFDisplayLink final : public QObject

    Q_OBJECT

public:

    explicit AVFDisplayLink(QObject *parent = nullptr);

    ~AVFDisplayLink() override;

    bool isValid() const;

    bool isActive() const;

public Q_SLOTS:

    void start();

    void stop();

Q_SIGNALS:

    void tick();

public:

    void displayLinkEvent();

protected:

    bool event(QEvent *) override;

private:

    QT_MANGLE_NAMESPACE(DisplayLinkObserver) *m_observer = {};

#if !defined(QT_PLATFORM_UIKIT)

    CVDisplayLinkRef m_cvDisplayLink{};

#endif

    bool m_isActive{};

    std::atomic<bool> m_framePending{false};

};

QT_END_NAMESPACE

#endif // AVFDISPLAYLINK_H