qt-everywhere-src-5.15.1/qtmultimedia/src/plugins/avfoundation/mediaplayer/avfvideoframerenderer.h

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#ifndef AVFVIDEOFRAMERENDERER_H
#define AVFVIDEOFRAMERENDERER_H

#include <QtCore/QObject>
#include <QtGui/QImage>
#include <QtGui/QOpenGLContext>
#include <QtCore/QSize>

@class CARenderer;
@class AVPlayerLayer;

QT_BEGIN_NAMESPACE

class QOpenGLFramebufferObject;
class QWindow;
class QOpenGLContext;
class QAbstractVideoSurface;

class AVFVideoFrameRenderer : public QObject
{
public:
    AVFVideoFrameRenderer(QAbstractVideoSurface *surface, QObject *parent = nullptr);

    virtual ~AVFVideoFrameRenderer();

    GLuint renderLayerToTexture(AVPlayerLayer *layer);
    QImage renderLayerToImage(AVPlayerLayer *layer);

private:
    QOpenGLFramebufferObject* initRenderer(AVPlayerLayer *layer);
    void renderLayerToFBO(AVPlayerLayer *layer, QOpenGLFramebufferObject *fbo);

    CARenderer *m_videoLayerRenderer;
    QAbstractVideoSurface *m_surface;
    QOpenGLFramebufferObject *m_fbo[2];
    QWindow *m_offscreenSurface;
    QOpenGLContext *m_glContext;
    QSize m_targetSize;

    uint m_currentBuffer;
    bool m_isContextShared;
};

QT_END_NAMESPACE

#endif // AVFVIDEOFRAMERENDERER_H