Implement VAAPI rendering for X11

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

@@ -0,0 +1,50 @@
+#pragma once
+
+#include "renderer.h"
+
+extern "C" {
+#include <va/va.h>
+#include <va/va_x11.h>
+#include <libavutil/hwcontext_vaapi.h>
+}
+
+class VAAPIRenderer : public IFFmpegRenderer
+{
+    typedef VAStatus (*vaPutSurface_t)(
+        VADisplay dpy,
+        VASurfaceID surface,
+        Drawable draw, /* X Drawable */
+        short srcx,
+        short srcy,
+        unsigned short srcw,
+        unsigned short srch,
+        short destx,
+        short desty,
+        unsigned short destw,
+        unsigned short desth,
+        VARectangle *cliprects,
+        unsigned int number_cliprects,
+        unsigned int flags
+    );
+
+public:
+    VAAPIRenderer();
+    virtual ~VAAPIRenderer();
+    virtual bool initialize(SDL_Window* window,
+                            int videoFormat,
+                            int width,
+                            int height);
+    virtual bool prepareDecoderContext(AVCodecContext* context);
+    virtual void renderFrame(AVFrame* frame);
+
+private:
+    Window m_XWindow;
+    AVBufferRef* m_HwContext;
+    void* m_X11VaLibHandle;
+    vaPutSurface_t m_vaPutSurface;
+    int m_VideoWidth;
+    int m_VideoHeight;
+    int m_DisplayWidth;
+    int m_DisplayHeight;
+};
+