linux-kernel - Re: support autofocus / autogain in libv4l2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20170425125143.GJ30553@pali>
Date:   Tue, 25 Apr 2017 14:51:43 +0200
From:   Pali Rohár <pali.rohar@...il.com>
To:     Pavel Machek <pavel@....cz>
Cc:     Mauro Carvalho Chehab <mchehab@...pensource.com>, sre@...nel.org,
        kernel list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
        aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
        patrikbachan@...il.com, serge@...lyn.com, abcloriens@...il.com,
        Sakari Ailus <sakari.ailus@....fi>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        linux-media@...r.kernel.org
Subject: Re: support autofocus / autogain in libv4l2

On Tuesday 25 April 2017 14:28:20 Pavel Machek wrote:
> On Tue 2017-04-25 13:30:09, Pali Rohár wrote:
> > On Tuesday 25 April 2017 13:23:30 Pavel Machek wrote:
> > > Hi!
> > > On Tue 2017-04-25 10:08:15, Pali Rohár wrote:
> > > > On Tuesday 25 April 2017 10:05:38 Pavel Machek wrote:
> > > > > > > It would be nice if more than one application could be accessing the
> > > > > > > camera at the same time... (I.e. something graphical running preview
> > > > > > > then using command line tool to grab a picture.) This one is
> > > > > > > definitely not solveable inside a library...
> > > > > > 
> > > > > > Someone once suggested to have something like pulseaudio for V4L.
> > > > > > For such usage, a server would be interesting. Yet, I would code it
> > > > > > in a way that applications using libv4l will talk with such daemon
> > > > > > in a transparent way.
> > > > > 
> > > > > Yes, we need something like pulseaudio for V4L. And yes, we should
> > > > > make it transparent for applications using libv4l.
> > > > 
> > > > IIRC there is already some effort in writing such "video" server which
> > > > would support accessing more application into webcam video, like
> > > > pulseaudio server for accessing more applications to microphone input.
> > > 
> > > Do you have project name / url / something?
> > 
> > Pinos (renamed from PulseVideo)
> > 
> > https://blogs.gnome.org/uraeus/2015/06/30/introducing-pulse-video/
> > https://cgit.freedesktop.org/~wtay/pinos/
> > 
> > But from git history it looks like it is probably dead now...
> 
> Actually, last commit is an hour ago on "work" branch. Seems alive to
> me ;-).

Great! I just (blindly) looked at master branch and it is old...

> Thanks for pointer...
> 									Pavel

-- 
Pali Rohár
pali.rohar@...il.com