Optimize CUDA GL interop and provide fallback

app/streaming/video/ffmpeg-renderers/cuda.h

@@ -2,6 +2,12 @@
 
 #include "renderer.h"
 
+#include <ffnvcodec/dynlink_loader.h>
+
+extern "C" {
+    #include <libavutil/hwcontext_cuda.h>
+}
+
 class CUDARenderer : public IFFmpegRenderer {
 public:
     CUDARenderer();
@@ -12,10 +18,25 @@ public:
     virtual bool needsTestFrame() override;
     virtual bool isDirectRenderingSupported() override;
 
-    // Helper function used by SDLRenderer to read our CUDA frame
-    static bool copyCudaFrameToBoundTexture(AVFrame* frame);
-
 private:
     AVBufferRef* m_HwContext;
 };
 
+#define NV12_PLANES 2
+
+// Helper class used by SDLRenderer to read our CUDA frame
+class CUDAGLInteropHelper {
+public:
+    CUDAGLInteropHelper(AVHWDeviceContext* context);
+    ~CUDAGLInteropHelper();
+
+    bool registerBoundTextures();
+    void unregisterTextures();
+
+    bool copyCudaFrameToTextures(AVFrame* frame);
+
+private:
+    CudaFunctions* m_Funcs;
+    AVCUDADeviceContext* m_Context;
+    CUgraphicsResource m_Resources[NV12_PLANES];
+};