Calculate the error introduced by quantization as "quantization gain"
and return it separately from splitExposure(). It is not included in the
digital gain, to not silently ignore the limits imposed by the AGC
configuration.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>