libcamera/libcamera.git - libcamera official repository

Age	Commit message (Collapse)	Author
11 days	libcamera: software_isp: Track whether CCM is enabled	Milan Zamazal
	Applying color correction matrix (CCM) in software ISP is optional due to performance reasons. CCM is applied if and only if `Ccm' algorithm is present in the tuning file. Software ISP debayering is a performance critical piece of code and we do not want to use dynamic conditionals there. Therefore we pass information about CCM application to debayering configuration and let it select the right versions of debayering functions using templates. This is a trick similar to the previously used one for adding or not adding an alpha channel to the output. Debayering gets this information but it ignores it in this patch. Actual processing with CCM is added in the followup patch. Signed-off-by: Milan Zamazal <mzamazal@redhat.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Milan Zamazal <mzamazal@redhat.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
11 days	libcamera: software_isp: Add CCM algorithm	Milan Zamazal
	This patch adds color correction matrix (CCM) algorithm to software ISP. It is based on the corresponding algorithm in rkisp1. The primary difference against hardware pipelines is that applying the CCM is optional. Applying CCM causes a significant slowdown, time needed to process a frame raises by 40-90% on tested platforms. If CCM is really needed, it can be applied, if not, it's better to stick without it. This can be configured by presence or omission of Ccm algorithm in the tuning file. CCM is changed only if the determined temperature changes by at least 100 K (an arbitrarily selected value), to avoid recomputing the matrices and lookup tables all the time. Since the CCM is float, rather than double, to use the same type as in the rkisp1 pipeline, the type of color gains is changed from double to float. The outputs of the algorithm are not used yet, they will be enabled in followup patches. Signed-off-by: Milan Zamazal <mzamazal@redhat.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Milan Zamazal <mzamazal@redhat.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>