From: mchehab@s-opensource•com (Mauro Carvalho Chehab)
To: linux-arm-kernel@lists•infradead.org
Subject: support autofocus / autogain in libv4l2
Date: Mon, 24 Apr 2017 22:57:38 -0300 [thread overview]
Message-ID: <20170424225731.7532e368@vento.lan> (raw)
In-Reply-To: <20170424220701.GA27846@amd>
Em Tue, 25 Apr 2017 00:07:01 +0200
Pavel Machek <pavel@ucw•cz> 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
next prev parent reply other threads:[~2017-04-25 1:57 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1487074823-28274-1-git-send-email-sakari.ailus@linux.intel.com>
[not found] ` <1487074823-28274-2-git-send-email-sakari.ailus@linux.intel.com>
[not found] ` <20170414232332.63850d7b@vento.lan>
[not found] ` <20170416091209.GB7456@valkosipuli.retiisi.org.uk>
[not found] ` <20170419105118.72b8e284@vento.lan>
[not found] ` <20170424093059.GA20427@amd>
2017-04-24 13:38 ` support autofocus / autogain in libv4l2 Mauro Carvalho Chehab
2017-04-24 21:29 ` Pavel Machek
2017-04-25 1:47 ` Mauro Carvalho Chehab
2017-04-25 8:05 ` Pavel Machek
2017-04-25 8:08 ` Pali Rohár
2017-04-25 11:23 ` Pavel Machek
2017-04-25 11:30 ` Pali Rohár
2017-04-25 12:28 ` Pavel Machek
2017-04-25 12:51 ` Pali Rohár
2017-04-25 16:55 ` Nicolas Dufresne
2017-04-25 16:51 ` Nicolas Dufresne
2017-04-25 16:53 ` Nicolas Dufresne
2017-04-26 10:53 ` Pavel Machek
2017-04-26 10:53 ` [patch] propagating controls in libv4l2 was " Pavel Machek
2017-04-26 11:13 ` Mauro Carvalho Chehab
2017-04-26 13:23 ` [patch] autogain support for bayer10 format (was Re: [patch] propagating controls in libv4l2) Pavel Machek
2017-04-26 15:43 ` Ivaylo Dimitrov
2017-04-26 22:51 ` Pavel Machek
2017-04-27 5:52 ` Ivaylo Dimitrov
2017-07-13 7:57 ` Pavel Machek
2017-05-03 19:05 ` Russell King - ARM Linux
2017-05-03 19:58 ` Pavel Machek
2017-04-30 22:48 ` Pavel Machek
2017-07-13 9:49 ` [patch] propagating controls in libv4l2 was Re: support autofocus / autogain in libv4l2 Pavel Machek
2017-04-26 11:26 ` Mauro Carvalho Chehab
2017-04-29 9:19 ` Pavel Machek
[not found] ` <20171021220026.GA26881@amd>
2017-10-22 7:36 ` Camera support, Prague next week, sdlcam Hans Verkuil
2017-10-22 8:31 ` Pavel Machek
2017-10-23 18:54 ` Pavel Machek
2017-10-23 19:24 ` Hans Verkuil
2017-10-23 20:15 ` Sakari Ailus
2017-10-23 21:02 ` Mauro Carvalho Chehab
[not found] ` <20171031212812.GA11148@amd>
2017-11-01 6:36 ` Nokia N9: fun with camera Pavel Machek
2017-11-01 15:32 ` Pavel Machek
2017-04-24 22:07 ` support autofocus / autogain in libv4l2 Pavel Machek
2017-04-25 1:57 ` Mauro Carvalho Chehab [this message]
2017-04-25 8:20 ` Pavel Machek
2017-04-25 11:23 ` Pavel Machek
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