sdlvideowidget.h

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#pragma once
 
#include <promeki/namespace.h>
#include <promeki/widget.h>
#include <promeki/uncompressedvideopayload.h>
 
struct SDL_Texture;
struct SDL_Renderer;
 
PROMEKI_NAMESPACE_BEGIN
 
class SDLVideoWidget : public Widget {
                PROMEKI_OBJECT(SDLVideoWidget, Widget)
        public:
                enum ScaleMode {
                        ScaleNone,   
                        ScaleFit,    
                        ScaleStretch 
                };
 
                SDLVideoWidget(ObjectBase *parent = nullptr);
 
                ~SDLVideoWidget();
 
                void setPayload(const UncompressedVideoPayload::Ptr &payload);
 
                void setScaleMode(ScaleMode mode) { _scaleMode = mode; }
 
                ScaleMode scaleMode() const { return _scaleMode; }
 
                static uint32_t mapPixelFormat(const PixelFormat &pd);
 
                static uint32_t mapColorspace(const PixelFormat &pd);
 
                static bool isDirectlyMappable(const PixelFormat &pd);
 
        protected:
                void paintEvent(PaintEvent *e) override;
 
        private:
                SDL_Texture                  *_texture = nullptr;
                Size2Di32                     _textureSize{0, 0};
                uint32_t                      _texturePixFmt = 0;
                uint32_t                      _textureColorspace = 0;
                ScaleMode                     _scaleMode = ScaleFit;
                UncompressedVideoPayload::Ptr _currentPayload;
                uint32_t                      _frameCount = 0;
                uint32_t                      _framesFastPath = 0;
 
                void          ensureTexture(int w, int h, uint32_t sdlPixFmt, uint32_t sdlColorspace);
                void          uploadPayload(const UncompressedVideoPayload &payload, uint32_t sdlPixFmt);
                bool          uploadCurrentPayload();
                SDL_Renderer *findRenderer() const;
};
 
PROMEKI_NAMESPACE_END