qgstreamervideosink_p.h

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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 QGSTREAMERVIDEOSINK_H

#define QGSTREAMERVIDEOSINK_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 <QtMultimedia/qvideosink.h>

#include <QtMultimedia/private/qplatformvideosink_p.h>

#include <QtMultimedia/private/qthreadlocalrhi_p.h>

#include <common/qgstvideorenderersink_p.h>

#include <common/qgstpipeline_p.h>

QT_BEGIN_NAMESPACE

class QGstreamerPluggableVideoSink : public QPlatformVideoSink

    Q_OBJECT

public:

    explicit QGstreamerPluggableVideoSink(QVideoSink *parent = nullptr);

    void setRhi(QRhi *rhi) override;

    QRhi *rhi() const;

private:

    QRhi *m_rhi = nullptr;

};

class QGstreamerRelayVideoSink : public QObject

    Q_OBJECT

    friend class QGstreamerPluggableVideoSink;

public:

    explicit QGstreamerRelayVideoSink(QObject *parent = nullptr);

    ~QGstreamerRelayVideoSink();

    QRhi *rhi() const { return m_rhi ? m_rhi : qEnsureThreadLocalRhi(); }

    QGstElement gstSink();

    GstContext *gstGlDisplayContext() const { return m_gstGlDisplayContext.get(); }

    GstContext *gstGlLocalContext() const { return m_gstGlLocalContext.get(); }

    void setActive(bool);

    void setAsync(bool);

    void connectPluggableVideoSink(QGstreamerPluggableVideoSink *pluggableSink);

    void disconnectPluggableVideoSink();

    void setVideoFrame(const QVideoFrame &frame);

    void setSubtitleText(const QString &subtitleText);

    void setNativeSize(QSize size);

Q_SIGNALS:

    void aboutToBeDestroyed();

    void videoFrameChanged(const QVideoFrame &frame);

    void subtitleTextChanged(const QString &subtitleText);

    void nativeSizeChanged(QSize size);

private:

    void createQtSink();

    void updateSinkElement(QGstVideoRendererSinkElement newSink);

    void unrefGstContexts();

    void updateGstContexts();

    void renderingRhiChanged(QRhi *rhi);

    QGstBin m_sinkBin;

    QGstElement m_gstPreprocess;

    QGstElement m_gstCapsFilter;

    QGstElement m_gstVideoSink;

    QGstVideoRendererSinkElement m_gstQtSink;

    QRhi *m_rhi = nullptr;

    bool m_isActive = true;

    bool m_sinkIsAsync = true;

    QGstContextHandle m_gstGlLocalContext;

    QGstContextHandle m_gstGlDisplayContext;

    QVideoFrame m_currentVideoFrame;

    QString m_currentSubtitleText;

    QSize m_currentNativeSize;

    QGstreamerPluggableVideoSink *m_pluggableVideoSink = nullptr;

    QMetaObject::Connection m_rhiConnection;

};

QT_END_NAMESPACE

#endif