Add a lux algorithm module to rkisp1 IPA for estimating the lux level of
an image. This is reported in metadata, as well as saved in the frame
context so that other algorithms (mainly AGC) can use its value. It does
not set any controls.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Isaac Scott <isaac.scott@ideasonboard.com>
