V4L/DVB (8870): gspca: Fix dark room problem with sonixb.

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When using the sonixb driver in a dark room and given that the autoexposure
algorithm starts with a setting most suitable for daylight, the picture
produced by the cam may actually be 100% black leading to a avg_lum value of 0,
so an avg_lum value of 0 does not always signal an exposure settings change
(which it normally does). This patch adds a check for the really black image
case and stops dropping all frames as invalid in this case.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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Hans de Goede 2008-09-04 16:22:56 -03:00 • committed by Mauro Carvalho Chehab

parent a94a508691

commit bf2a2202f7

1 changed files with 12 additions and 2 deletions

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drivers/media/video/gspca/sonixb.c

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