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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QFFMPEGCLOCK_P_H
#define QFFMPEGCLOCK_P_H
#include "qffmpeg_p.h"
#include <qelapsedtimer.h>
#include <qlist.h>
#include <qmutex.h>
#include <qmetaobject.h>
QT_BEGIN_NAMESPACE
namespace QFFmpeg {
class ClockController;
// Clock runs in displayTime, ie. if playbackRate is not 1, it runs faster or slower
// than a regular clock. All methods take displayTime
// Exception: usecsTo() will return the real time that should pass until we will
// hit the requested display time
class Clock
{
ClockController *controller = nullptr;
public:
enum Type {
SystemClock,
AudioClock
};
Clock(ClockController *controller);
virtual ~Clock();
virtual Type type() const;
float playbackRate() const;
bool isMaster() const;
// all times in usecs
qint64 currentTime() const;
qint64 seekTime() const;
qint64 usecsTo(qint64 currentTime, qint64 displayTime);
protected:
virtual void syncTo(qint64 usecs);
virtual void setPlaybackRate(float rate, qint64 currentTime);
virtual void setPaused(bool paused);
qint64 timeUpdated(qint64 currentTime);
private:
friend class ClockController;
void setController(ClockController *c)
{
controller = c;
}
};
class ClockController
{
mutable QMutex m_mutex;
QList<Clock *> m_clocks;
Clock *m_master = nullptr;
QElapsedTimer m_timer;
qint64 m_baseTime = 0;
qint64 m_seekTime = 0;
float m_playbackRate = 1.;
bool m_isPaused = true;
qint64 m_lastMasterTime = 0;
QObject *notifyObject = nullptr;
QMetaMethod notify;
qint64 currentTimeNoLock() const { return m_isPaused ? m_baseTime : m_baseTime + m_timer.elapsed()/m_playbackRate; }
friend class Clock;
qint64 timeUpdated(Clock *clock, qint64 time);
void addClock(Clock *provider);
void removeClock(Clock *provider);
public:
// max 25 msecs tolerance for the clock
enum { ClockTolerance = 25000 };
ClockController() = default;
~ClockController();
qint64 currentTime() const;
void syncTo(qint64 usecs);
void setPlaybackRate(float s);
float playbackRate() const { return m_playbackRate; }
void setPaused(bool paused);
void setNotify(QObject *object, QMetaMethod method)
{
notifyObject = object;
notify = method;
}
};
inline float Clock::playbackRate() const
{
return controller ? controller->m_playbackRate : 1.;
}
inline bool Clock::isMaster() const
{
return controller ? controller->m_master == this : false;
}
inline qint64 Clock::seekTime() const
{
return controller ? controller->m_seekTime : 0;
}
}
QT_END_NAMESPACE
#endif
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