From mboxrd@z Thu Jan 1 00:00:00 1970 From: mchehab@s-opensource.com (Mauro Carvalho Chehab) Date: Mon, 24 Apr 2017 22:57:38 -0300 Subject: support autofocus / autogain in libv4l2 In-Reply-To: <20170424220701.GA27846@amd> References: <1487074823-28274-1-git-send-email-sakari.ailus@linux.intel.com> <1487074823-28274-2-git-send-email-sakari.ailus@linux.intel.com> <20170414232332.63850d7b@vento.lan> <20170416091209.GB7456@valkosipuli.retiisi.org.uk> <20170419105118.72b8e284@vento.lan> <20170424093059.GA20427@amd> <20170424103802.00d3b554@vento.lan> <20170424220701.GA27846@amd> Message-ID: <20170424225731.7532e368@vento.lan> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Em Tue, 25 Apr 2017 00:07:01 +0200 Pavel Machek escreveu: > Hi! > > > Please don't add a new application under lib/. It is fine if you want > > some testing application, if the ones there aren't enough, but please > > place it under contrib/test/. > > > > You should likely take a look at v4l2grab first, as it could have > > almost everything you would need. > > I really need some kind of video output. v4l2grab is not useful > there. v4l2gl might be, but I don't think I have enough dependencies. Well, you could use some app to show the snaps that v4l2grab takes. Yeah, compiling v4l2gl on N9 can indeed be complex. I suspect that it shouldn't hard to compile xawtv there (probably disabling some optional features). > Umm, and it looks like libv4l can not automatically convert from > GRBG10.. and if it could, going through RGB24 would probably be too > slow on this device :-(. I suspect it shouldn't be hard to add support for GRBG10. It already supports 8 and 16 bits Bayer formats, at lib/libv4lconvert/bayer.c (to both RGB and YUV formats). How it would preform is another question ;) > > IMO, the above belongs to a separate processing module under > > lib/libv4lconvert/processing/ > > Is there an example using autogain/autowhitebalance from > libv4lconvert? Well, if you plug a USB camera without those controls, it should automatically expose controls for it, as if the device had such controls. Thanks, Mauro