1 files changed, 125 insertions, 0 deletions
diff --git a/src/plugins/multimedia/ffmpeg/playbackengine/qffmpegrenderer_p.h b/src/plugins/multimedia/ffmpeg/playbackengine/qffmpegrenderer_p.h
new file mode 100644
index 000000000..99c5ef1b1
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+++ b/src/plugins/multimedia/ffmpeg/playbackengine/qffmpegrenderer_p.h
@@ -0,0 +1,125 @@
+// 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