Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3f359a7c authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Mauro Carvalho Chehab
Browse files

[media] v4l: Fix colorspace conversion error in sample code 



The sample code erroneously scales the y1, pb and pr variables from the
[0.0 .. 1.0] and [-0.5 .. 0.5] ranges to [0 .. 255] and [-128 .. 127].
Fix it.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 5045b495

Documentation/DocBook/media/v4l/pixfmt.xml

+3 −3
Original line number Diff line number Diff line
@@ -391,9 +391,9 @@ clamp (double x) 
	else               return r;

}



y1 = (255 / 219.0) * (Y1 - 16);

pb = (255 / 224.0) * (Cb - 128);

pr = (255 / 224.0) * (Cr - 128);

y1 = (Y1 - 16) / 219.0;

pb = (Cb - 128) / 224.0;

pr = (Cr - 128) / 224.0;



r = 1.0 * y1 + 0     * pb + 1.402 * pr;

g = 1.0 * y1 - 0.344 * pb - 0.714 * pr;