libcamera: Use the Size class through libcamera

Several of our structures include width and height fields that model a
size while we have a Size class for that purpose. Use the Size class
through libcamera, and give it a toString() method like other geometry
and format classes.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

src/libcamera/include/v4l2_device.h

@@ -13,6 +13,7 @@
 
 #include <linux/videodev2.h>
 
+#include <libcamera/geometry.h>
 #include <libcamera/signal.h>
 
 #include "log.h"
@@ -92,9 +93,8 @@ struct V4L2Capability final : v4l2_capability {
 class V4L2DeviceFormat
 {
 public:
-	uint32_t width;
-	uint32_t height;
 	uint32_t fourcc;
+	Size size;
 
 	struct {
 		uint32_t size;

src/libcamera/include/v4l2_subdevice.h

@@ -23,8 +23,7 @@ class MediaDevice;
 
 struct V4L2SubdeviceFormat {
 	uint32_t mbus_code;
-	uint32_t width;
-	uint32_t height;
+	Size size;
 
 	const std::string toString() const;
 };