docs: improvements to source code documentation (#1236)

src/platform/linux/vaapi.h

@@ -1,5 +1,4 @@
-#ifndef SUNSHINE_VAAPI_H
-#define SUNSHINE_VAAPI_H
+#pragma once
 
 #include "misc.h"
 #include "src/platform/common.h"
@@ -9,12 +8,12 @@ namespace egl {
 }
 namespace va {
   /**
- * Width --> Width of the image
- * Height --> Height of the image
- * offset_x --> Horizontal offset of the image in the texture
- * offset_y --> Vertical offset of the image in the texture
- * file_t card --> The file descriptor of the render device used for encoding
- */
+   * Width --> Width of the image
+   * Height --> Height of the image
+   * offset_x --> Horizontal offset of the image in the texture
+   * offset_y --> Vertical offset of the image in the texture
+   * file_t card --> The file descriptor of the render device used for encoding
+   */
   std::shared_ptr<platf::hwdevice_t>
   make_hwdevice(int width, int height, bool vram);
   std::shared_ptr<platf::hwdevice_t>
@@ -29,4 +28,3 @@ namespace va {
   int
   init();
 }  // namespace va
-#endif