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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 QFFMPEGRENDERER_P_H
#define QFFMPEGRENDERER_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 "playbackengine/qffmpegplaybackengineobject_p.h"
#include "playbackengine/qffmpegtimecontroller_p.h"
#include "playbackengine/qffmpegframe_p.h"
#include <QtCore/qpointer.h>
#include <chrono>
QT_BEGIN_NAMESPACE
namespace QFFmpeg {
class Renderer : public PlaybackEngineObject
{
Q_OBJECT
public:
using TimePoint = TimeController::TimePoint;
using Clock = TimeController::Clock;
Renderer(const TimeController &tc, const std::chrono::microseconds &seekPosTimeOffset = {});
void syncSoft(TimePoint tp, qint64 trackPos);
qint64 seekPosition() const;
qint64 lastPosition() const;
void setPlaybackRate(float rate);
void doForceStep();
bool isStepForced() const;
public slots:
void setInitialPosition(TimePoint tp, qint64 trackPos);
void onFinalFrameReceived();
void render(Frame);
signals:
void frameProcessed(Frame);
void synchronized(Id id, TimePoint tp, qint64 pos);
void forceStepDone();
void loopChanged(Id id, qint64 offset, int index);
protected:
bool setForceStepDone();
void onPauseChanged() override;
bool canDoNextStep() const override;
int timerInterval() const override;
virtual void onPlaybackRateChanged() { }
struct RenderingResult
{
bool done = true;
std::chrono::microseconds recheckInterval = std::chrono::microseconds(0);
};
virtual RenderingResult renderInternal(Frame frame) = 0;
float playbackRate() const;
std::chrono::microseconds frameDelay(const Frame &frame,
TimePoint timePoint = Clock::now()) const;
void changeRendererTime(std::chrono::microseconds offset);
template<typename Output, typename ChangeHandler>
void setOutputInternal(QPointer<Output> &actual, Output *desired, ChangeHandler &&changeHandler)
{
const auto connectionType = thread() == QThread::currentThread()
? Qt::AutoConnection
: Qt::BlockingQueuedConnection;
auto doer = [desired, changeHandler, &actual]() {
const auto prev = std::exchange(actual, desired);
if (prev != desired)
changeHandler(prev);
};
QMetaObject::invokeMethod(this, doer, connectionType);
}
private:
void doNextStep() override;
private:
TimeController m_timeController;
qint64 m_lastFrameEnd = 0;
QAtomicInteger<qint64> m_lastPosition = 0;
QAtomicInteger<qint64> m_seekPos = 0;
int m_loopIndex = 0;
QQueue<Frame> m_frames;
QAtomicInteger<bool> m_isStepForced = false;
std::optional<TimePoint> m_explicitNextFrameTime;
};
} // namespace QFFmpeg
QT_END_NAMESPACE
#endif // QFFMPEGRENDERER_P_H
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