From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S979899AbdDYB57 (ORCPT ); Mon, 24 Apr 2017 21:57:59 -0400 Received: from ec2-52-27-115-49.us-west-2.compute.amazonaws.com ([52.27.115.49]:50119 "EHLO osg.samsung.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S938935AbdDYB5t (ORCPT ); Mon, 24 Apr 2017 21:57:49 -0400 Date: Mon, 24 Apr 2017 22:57:38 -0300 From: Mauro Carvalho Chehab To: Pavel Machek Cc: pali.rohar@gmail.com, sre@kernel.org, kernel list , linux-arm-kernel , 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 , linux-media@vger.kernel.org, hdegoede@redhat.com Subject: Re: support autofocus / autogain in libv4l2 Message-ID: <20170424225731.7532e368@vento.lan> 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> Organization: Samsung X-Mailer: Claws Mail 3.14.1 (GTK+ 2.24.31; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 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