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// Copyright (C) 2023 The Qt Company Ltd.
// Copyright (C) 2019 Luxoft Sweden AB
// Copyright (C) 2018 Pelagicore AG
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#pragma once
#include <QtCore/QElapsedTimer>
#include <QtCore/QObject>
#include <QtCore/QMetaObject>
#include <QtCore/QPointer>
#include <QtCore/QTimer>
#include <QtAppManCommon/global.h>
#include <limits>
QT_BEGIN_NAMESPACE_AM
class FrameTimerImpl;
class FrameTimer : public QObject
{
Q_OBJECT
Q_PROPERTY(qreal averageFps READ averageFps NOTIFY updated FINAL)
Q_PROPERTY(qreal minimumFps READ minimumFps NOTIFY updated FINAL)
Q_PROPERTY(qreal maximumFps READ maximumFps NOTIFY updated FINAL)
Q_PROPERTY(qreal jitterFps READ jitterFps NOTIFY updated FINAL)
Q_PROPERTY(QObject* window READ window WRITE setWindow NOTIFY windowChanged FINAL)
Q_PROPERTY(int interval READ interval WRITE setInterval NOTIFY intervalChanged FINAL)
Q_PROPERTY(bool running READ running WRITE setRunning NOTIFY runningChanged FINAL)
Q_PROPERTY(QStringList roleNames READ roleNames CONSTANT FINAL)
public:
FrameTimer(QObject *parent = nullptr);
~FrameTimer() override;
QStringList roleNames() const;
Q_INVOKABLE void update();
Q_SIGNAL void updated();
qreal averageFps() const;
qreal minimumFps() const;
qreal maximumFps() const;
qreal jitterFps() const;
QObject *window() const;
void setWindow(QObject *window);
Q_SIGNAL void windowChanged();
bool running() const;
void setRunning(bool running);
Q_SIGNAL void runningChanged();
int interval() const;
void setInterval(int interval);
Q_SIGNAL void intervalChanged();
void reportFrameSwap();
FrameTimerImpl *implementation();
protected:
std::unique_ptr<FrameTimerImpl> m_impl;
private:
QPointer<QObject> m_window;
int m_count = 0;
int m_sum = 0;
int m_min = std::numeric_limits<int>::max();
int m_max = 0;
qreal m_jitter = 0.0;
QElapsedTimer m_timer;
QTimer m_updateTimer;
qreal m_averageFps = 0.0;
qreal m_minimumFps = 0.0;
qreal m_maximumFps = 0.0;
qreal m_jitterFps = 0.0;
QMetaObject::Connection m_frameSwapConnection;
static const int IdealFrameTime = 16667; // usec - could be made configurable via an env variable
static const qreal MicrosInSec;
};
QT_END_NAMESPACE_AM
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