libcamera: camera_sensor: Add parameter to limit returned sensor size

The getFormat function takes the aspect ratio and the area of the
requested size into account when choosing the best sensor size. In case
the sensor is connected to an rkisp1 the maximum supported frame size of
the ISP is another constraining factor for the selection of the best
format. Add a maxSize parameter to support such a constraint.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>

include/libcamera/internal/camera_sensor.h

@@ -53,7 +53,7 @@ public:
 
 	virtual V4L2SubdeviceFormat
 	getFormat(const std::vector<unsigned int> &mbusCodes,
-		  const Size &size) const = 0;
+		  const Size &size, const Size maxSize = Size()) const = 0;
 	virtual int setFormat(V4L2SubdeviceFormat *format,
 			      Transform transform = Transform::Identity) = 0;
 	virtual int tryFormat(V4L2SubdeviceFormat *format) const = 0;