libcamera: formats: Move plane info structure to PixelFormatInfo

Move the PixelFormatPlaneInfo structure within the PixelFormatInfo class
definition and rename it to Plane, to align the naming scheme with other
parts of libcamera, such as FrameBuffer::Plane or FrameMetadata::Plane.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

include/libcamera/internal/formats.h

@@ -19,12 +19,6 @@
 
 namespace libcamera {
 
-struct PixelFormatPlaneInfo
-{
-	unsigned int bytesPerGroup;
-	unsigned int verticalSubSampling;
-};
-
 class PixelFormatInfo
 {
 public:
@@ -34,6 +28,11 @@ public:
 		ColourEncodingRAW,
 	};
 
+	struct Plane {
+		unsigned int bytesPerGroup;
+		unsigned int verticalSubSampling;
+	};
+
 	bool isValid() const { return format.isValid(); }
 
 	static const PixelFormatInfo &info(const PixelFormat &format);
@@ -58,7 +57,7 @@ public:
 
 	unsigned int pixelsPerGroup;
 
-	std::array<PixelFormatPlaneInfo, 3> planes;
+	std::array<Plane, 3> planes;
 };
 
 } /* namespace libcamera */