From: Pavel Machek <pavel@ucw.cz> To: Mauro Carvalho Chehab <mchehab@s-opensource.com> Cc: pali.rohar@gmail.com, sre@kernel.org, kernel list <linux-kernel@vger.kernel.org>, linux-arm-kernel <linux-arm-kernel@lists.infradead.org>, linux-omap@vger.kernel.org, tony@atomide.com, khilman@kernel.org, aaro.koskinen@iki.fi, ivo.g.dimitrov.75@gmail.com, patrikbachan@gmail.com, serge@hallyn.com, abcloriens@gmail.com, Sakari Ailus <sakari.ailus@iki.fi>, Sakari Ailus <sakari.ailus@linux.intel.com>, linux-media@vger.kernel.org, hdegoede@redhat.com Subject: Re: support autofocus / autogain in libv4l2 Date: Tue, 25 Apr 2017 10:20:41 +0200 [thread overview] Message-ID: <20170425082041.GB30380@amd> (raw) In-Reply-To: <20170424225731.7532e368@vento.lan> [-- Attachment #1: Type: text/plain, Size: 1919 bytes --] 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. That would be too slow :-(. > 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). I do have mplayer working, but that one is not linked against libv4l2 :-(. > > 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). Is 16bit bayer a recent development? I can't see it in commit 374806e868f5a7a48ecffde4c6a1abfcfa5ccd65 Author: Hans Verkuil <hans.verkuil@cisco.com> Date: Fri Apr 22 09:31:57 2016 +0200 > > 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. And settings are persistent, so I can enable autogain, then lauch something like xawtv, and it will automatically get autogain? Ok, good. Regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 181 bytes --]
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From: pavel@ucw.cz (Pavel Machek) To: linux-arm-kernel@lists.infradead.org Subject: support autofocus / autogain in libv4l2 Date: Tue, 25 Apr 2017 10:20:41 +0200 [thread overview] Message-ID: <20170425082041.GB30380@amd> (raw) In-Reply-To: <20170424225731.7532e368@vento.lan> 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. That would be too slow :-(. > 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). I do have mplayer working, but that one is not linked against libv4l2 :-(. > > 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). Is 16bit bayer a recent development? I can't see it in commit 374806e868f5a7a48ecffde4c6a1abfcfa5ccd65 Author: Hans Verkuil <hans.verkuil@cisco.com> Date: Fri Apr 22 09:31:57 2016 +0200 > > 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. And settings are persistent, so I can enable autogain, then lauch something like xawtv, and it will automatically get autogain? Ok, good. Regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20170425/23ad62a6/attachment.sig>
next prev parent reply other threads:[~2017-04-25 8:20 UTC|newest] Thread overview: 152+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-02-14 12:20 [PATCH v3 0/2] v4l: Add camera voice coil lens control class, current control Sakari Ailus 2017-02-14 12:20 ` [PATCH v3 1/2] " Sakari Ailus 2017-02-14 22:47 ` Pavel Machek 2017-02-15 7:15 ` Sakari Ailus 2017-02-15 8:09 ` Pavel Machek 2017-02-20 22:26 ` Sakari Ailus 2017-02-20 22:48 ` Pavel Machek 2017-04-15 2:23 ` Mauro Carvalho Chehab 2017-04-15 7:12 ` Pavel Machek 2017-04-16 9:12 ` Sakari Ailus 2017-04-19 13:51 ` Mauro Carvalho Chehab 2017-04-24 9:30 ` support autofocus / autogain in libv4l2 Pavel Machek 2017-04-24 13:38 ` Mauro Carvalho Chehab 2017-04-24 13:38 ` Mauro Carvalho Chehab 2017-04-24 21:29 ` Pavel Machek 2017-04-24 21:29 ` Pavel Machek 2017-04-25 1:47 ` Mauro Carvalho Chehab 2017-04-25 1:47 ` Mauro Carvalho Chehab 2017-04-25 8:05 ` Pavel Machek 2017-04-25 8:05 ` Pavel Machek 2017-04-25 8:08 ` Pali Rohár 2017-04-25 8:08 ` Pali Rohár 2017-04-25 8:08 ` Pali Rohár 2017-04-25 11:23 ` Pavel Machek 2017-04-25 11:23 ` Pavel Machek 2017-04-25 11:30 ` Pali Rohár 2017-04-25 11:30 ` Pali Rohár 2017-04-25 12:28 ` Pavel Machek 2017-04-25 12:28 ` Pavel Machek 2017-04-25 12:51 ` Pali Rohár 2017-04-25 12:51 ` Pali Rohár 2017-04-25 16:55 ` Nicolas Dufresne 2017-04-25 16:55 ` Nicolas Dufresne 2017-04-25 16:51 ` Nicolas Dufresne 2017-04-25 16:51 ` Nicolas Dufresne 2017-04-25 16:53 ` Nicolas Dufresne 2017-04-25 16:53 ` Nicolas Dufresne 2017-04-25 16:53 ` Nicolas Dufresne 2017-04-26 10:53 ` Pavel Machek 2017-04-26 10:53 ` Pavel Machek 2017-04-26 10:53 ` [patch] propagating controls in libv4l2 was " Pavel Machek 2017-04-26 10:53 ` Pavel Machek 2017-04-26 11:13 ` Mauro Carvalho Chehab 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 13:23 ` Pavel Machek 2017-04-26 15:43 ` Ivaylo Dimitrov 2017-04-26 15:43 ` Ivaylo Dimitrov 2017-04-26 22:51 ` Pavel Machek 2017-04-26 22:51 ` Pavel Machek 2017-04-26 22:51 ` Pavel Machek 2017-04-27 5:52 ` Ivaylo Dimitrov 2017-04-27 5:52 ` Ivaylo Dimitrov 2017-07-13 7:57 ` Pavel Machek 2017-07-13 7:57 ` Pavel Machek 2017-05-03 19:05 ` Russell King - ARM Linux 2017-05-03 19:05 ` Russell King - ARM Linux 2017-05-03 19:58 ` Pavel Machek 2017-05-03 19:58 ` Pavel Machek 2017-05-08 22:28 ` [patch, libv4l]: fix integer overflow Pavel Machek 2017-05-09 6:29 ` Hans Verkuil 2017-05-09 6:32 ` Hans Verkuil 2017-05-09 8:02 ` Pavel Machek 2017-05-09 10:59 ` [patch, libv4l]: fix typos Pavel Machek 2017-05-09 11:01 ` [patch, libv4l]: Add support for GRBG10 format conversion Pavel Machek 2017-05-09 11:04 ` [patch, libv4l]: Introduce define for lookup table size Pavel Machek 2017-05-16 11:17 ` Hans Verkuil 2017-05-16 12:45 ` Pavel Machek 2017-05-16 12:56 ` Hans Verkuil 2017-05-16 23:23 ` Pavel Machek 2017-05-19 9:13 ` [libv4l]: How to do 10-bit support? Stand-alone conversions? Pavel Machek 2018-03-16 20:55 ` [RFC, libv4l]: Make libv4l2 usable on devices with complex pipeline Pavel Machek 2018-03-19 9:47 ` Hans Verkuil 2018-03-19 10:23 ` Pavel Machek 2018-03-19 10:47 ` Mauro Carvalho Chehab 2018-03-19 11:11 ` Hans Verkuil 2018-03-19 12:00 ` Pavel Machek 2018-03-19 12:15 ` Hans Verkuil 2018-03-19 12:48 ` Pavel Machek 2018-03-19 13:29 ` Hans Verkuil 2018-03-19 22:18 ` Pavel Machek 2018-03-19 13:45 ` Mauro Carvalho Chehab 2018-03-19 13:26 ` Mauro Carvalho Chehab 2018-03-20 7:50 ` Pavel Machek 2018-05-15 20:01 ` Pavel Machek 2018-05-15 22:03 ` Mauro Carvalho Chehab 2018-05-16 20:53 ` Pavel Machek 2018-06-02 21:01 ` Pavel Machek 2018-06-06 6:18 ` Tomasz Figa 2018-06-06 8:46 ` Pavel Machek 2018-06-06 8:53 ` Tomasz Figa 2018-06-06 10:01 ` Pavel Machek 2018-06-06 16:57 ` Mauro Carvalho Chehab 2018-06-06 21:27 ` Pavel Machek 2018-06-07 12:22 ` [PATCH, " Pavel Machek 2018-06-06 10:51 ` [RFC, " Pavel Machek 2018-06-06 11:16 ` Tomasz Figa 2018-06-06 20:37 ` Pavel Machek 2018-06-06 17:13 ` Mauro Carvalho Chehab 2018-06-06 10:23 ` Pavel Machek 2018-06-07 7:25 ` Pavel Machek 2017-05-09 11:10 ` [patch, libv4l]: fix integer overflow Pavel Machek 2017-05-16 10:42 ` Pavel Machek 2017-05-21 10:33 ` [patch, libv4l]: add sdlcam example for testing digital still camera functionality Pavel Machek 2017-05-26 20:41 ` Pavel Machek 2017-05-27 9:27 ` Hans Verkuil 2017-05-29 6:13 ` Hans Verkuil 2017-05-29 7:32 ` Pavel Machek 2017-05-29 8:02 ` Hans Verkuil 2017-06-14 11:16 ` Sakari Ailus 2017-06-14 20:41 ` Pavel Machek 2017-07-13 8:36 ` Pavel Machek 2017-05-09 8:07 ` [patch, libv4l]: fix integer overflow Pavel Machek 2017-04-30 22:48 ` [patch] autogain support for bayer10 format (was Re: [patch] propagating controls in libv4l2) 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 2017-07-13 9:49 ` Pavel Machek 2017-04-26 11:26 ` Mauro Carvalho Chehab 2017-04-26 11:26 ` Mauro Carvalho Chehab 2017-04-29 9:19 ` Pavel Machek 2017-04-29 9:19 ` Pavel Machek 2017-10-21 22:00 ` Camera support, Prague next week, sdlcam Pavel Machek 2017-10-22 7:36 ` Hans Verkuil 2017-10-22 7:36 ` Hans Verkuil 2017-10-22 8:31 ` Pavel Machek 2017-10-22 8:31 ` Pavel Machek 2017-10-23 18:54 ` Pavel Machek 2017-10-23 18:54 ` Pavel Machek 2017-10-23 19:24 ` Hans Verkuil 2017-10-23 19:24 ` Hans Verkuil 2017-10-23 20:15 ` Sakari Ailus 2017-10-23 20:15 ` Sakari Ailus 2017-10-23 21:02 ` Mauro Carvalho Chehab 2017-10-23 21:02 ` Mauro Carvalho Chehab 2017-10-31 21:28 ` Nokia N9: fun with camera Pavel Machek 2017-11-01 6:36 ` Pavel Machek 2017-11-01 6:36 ` Pavel Machek 2017-11-01 15:32 ` Pavel Machek 2017-11-01 15:32 ` Pavel Machek 2017-04-24 22:07 ` support autofocus / autogain in libv4l2 Pavel Machek 2017-04-24 22:07 ` Pavel Machek 2017-04-25 1:57 ` Mauro Carvalho Chehab 2017-04-25 1:57 ` Mauro Carvalho Chehab 2017-04-25 8:20 ` Pavel Machek [this message] 2017-04-25 8:20 ` Pavel Machek 2017-04-25 11:23 ` Pavel Machek 2017-04-25 11:23 ` Pavel Machek 2017-04-28 22:00 ` [PATCH v3 1/2] v4l: Add camera voice coil lens control class, current control Pavel Machek 2017-04-29 1:46 ` Mauro Carvalho Chehab 2017-05-12 10:49 ` Sakari Ailus 2017-05-13 11:08 ` Pavel Machek 2017-02-14 12:20 ` [PATCH v3 2/2] ad5820: Use VOICE_COIL_CURRENT control Sakari Ailus
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