qt-everywhere-src-5.15.1/qtmultimedia/src/qtmultimediaquicktools/qdeclarativevideooutput_render_p.h

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#ifndef QDECLARATIVEVIDEOOUTPUT_RENDER_P_H
#define QDECLARATIVEVIDEOOUTPUT_RENDER_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 <private/qdeclarativevideooutput_backend_p.h>
#include <private/qsgvideonode_yuv_p.h>
#include <private/qsgvideonode_rgb_p.h>
#include <private/qsgvideonode_texture_p.h>

#include <QtCore/qmutex.h>
#include <QtMultimedia/qabstractvideosurface.h>

QT_BEGIN_NAMESPACE

class QSGVideoItemSurface;
class QVideoRendererControl;
class QOpenGLContext;
class QAbstractVideoFilter;
class QVideoFilterRunnable;

class QDeclarativeVideoRendererBackend : public QDeclarativeVideoBackend
{
public:
    QDeclarativeVideoRendererBackend(QDeclarativeVideoOutput *parent);
    ~QDeclarativeVideoRendererBackend();

    bool init(QMediaService *service) override;
    void itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &changeData) override;
    void releaseSource() override;
    void releaseControl() override;
    QSize nativeSize() const override;
    void updateGeometry() override;
    QSGNode *updatePaintNode(QSGNode *oldNode, QQuickItem::UpdatePaintNodeData *data) override;
    QAbstractVideoSurface *videoSurface() const override;
    QRectF adjustedViewport() const override;
    QOpenGLContext *glContext() const;

    friend class QSGVideoItemSurface;
    void present(const QVideoFrame &frame);
    void stop();

    void appendFilter(QAbstractVideoFilter *filter) override;
    void clearFilters() override;
    void releaseResources() override;
    void invalidateSceneGraph() override;

private:
    void scheduleDeleteFilterResources();

    QPointer<QVideoRendererControl> m_rendererControl;
    QList<QSGVideoNodeFactoryInterface*> m_videoNodeFactories;
    QSGVideoItemSurface *m_surface;
    QVideoSurfaceFormat m_surfaceFormat;
    QOpenGLContext *m_glContext;
    QVideoFrame m_frame;
    QVideoFrame m_frameOnFlush;
    bool m_frameChanged;
    QSGVideoNodeFactory_YUV m_i420Factory;
    QSGVideoNodeFactory_RGB m_rgbFactory;
    QSGVideoNodeFactory_Texture m_textureFactory;
    QMutex m_frameMutex;
    QRectF m_renderedRect;         // Destination pixel coordinates, clipped
    QRectF m_sourceTextureRect;    // Source texture coordinates

    struct Filter {
        Filter() : filter(0), runnable(0) { }
        Filter(QAbstractVideoFilter *filter) : filter(filter), runnable(0) { }
        QAbstractVideoFilter *filter;
        QVideoFilterRunnable *runnable;
    };
    QList<Filter> m_filters;
};

class QSGVideoItemSurface : public QAbstractVideoSurface
{
    Q_OBJECT
public:
    explicit QSGVideoItemSurface(QDeclarativeVideoRendererBackend *backend, QObject *parent = 0);
    ~QSGVideoItemSurface();
    QList<QVideoFrame::PixelFormat> supportedPixelFormats(QAbstractVideoBuffer::HandleType handleType) const override;
    bool start(const QVideoSurfaceFormat &format) override;
    void stop() override;
    bool present(const QVideoFrame &frame) override;
    void scheduleOpenGLContextUpdate();

private slots:
    void updateOpenGLContext();

private:
    QDeclarativeVideoRendererBackend *m_backend;
};

QT_END_NAMESPACE

#endif