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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 <QtCore/qmutex.h>
#if defined(Q_OS_IOS) || defined(Q_OS_TVOS)
#include <CoreVideo/CVBase.h>
#else
#include <QuartzCore/CVDisplayLink.h>
#endif
QT_BEGIN_NAMESPACE
class AVFDisplayLink : public QObject
{
Q_OBJECT
public:
explicit AVFDisplayLink(QObject *parent = nullptr);
virtual ~AVFDisplayLink();
bool isValid() const;
bool isActive() const;
public Q_SLOTS:
void start();
void stop();
Q_SIGNALS:
void tick(const CVTimeStamp &ts);
public:
void displayLinkEvent(const CVTimeStamp *);
protected:
virtual bool event(QEvent *) override;
private:
#if defined(Q_OS_IOS) || defined(Q_OS_TVOS)
void *m_displayLink;
#else
CVDisplayLinkRef m_displayLink;
#endif
QMutex m_displayLinkMutex;
bool m_pendingDisplayLinkEvent;
bool m_isActive;
CVTimeStamp m_frameTimeStamp;
};
QT_END_NAMESPACE
#endif // AVFDISPLAYLINK_H
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