QGCVideoNodeItem.h

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#pragma once
 
#include <QtCore/QSize>
#include <QtGui/QMatrix4x4>
#include <QtMultimedia/QVideoFrameFormat>
#include <QtQuick/QQuickItem>
#include <QtQuick/QSGRenderNode>
 
class QRhiTexture;
 
class QGCVideoNodeItem : public QQuickItem
{
    Q_OBJECT
 
public:
    explicit QGCVideoNodeItem(QQuickItem* parent = nullptr);
    ~QGCVideoNodeItem() override;
 
    void setCurrentTexture(QRhiTexture* texture, const QSize& frameSize, QVideoFrameFormat::PixelFormat pixelFormat,
                           const QMatrix4x4& externalTextureMatrix);
 
protected:
    QSGNode* updatePaintNode(QSGNode* oldNode, UpdatePaintNodeData* data) override;
 
private:
    QRhiTexture* _pendingTexture = nullptr;
    QSize _frameSize;
    QVideoFrameFormat::PixelFormat _pixelFormat = QVideoFrameFormat::Format_Invalid;
    QMatrix4x4 _externalTextureMatrix;
    bool _dirty = false;
};
 
class QGCVideoRenderNode : public QSGRenderNode
{
public:
    QGCVideoRenderNode();
    ~QGCVideoRenderNode() override;
 
    void setFrame(QRhiTexture* texture, const QSize& frameSize, QVideoFrameFormat::PixelFormat pixelFormat,
                  const QMatrix4x4& externalTextureMatrix);
 
    StateFlags changedStates() const override;
    RenderingFlags flags() const override;
    QRectF rect() const override;
 
    void prepare() override;
    void render(const RenderState* state) override;
    void releaseResources() override;
 
private:
    QRhiTexture* _texture = nullptr;
    QSize _frameSize;
    QVideoFrameFormat::PixelFormat _pixelFormat = QVideoFrameFormat::Format_Invalid;
    QMatrix4x4 _externalTextureMatrix;
};