linux-kernel - Re: [PATCH 1/1] V4L: stk11xx, add a new webcam driver

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: <1180378677.21547.189.camel@localhost>
Date:	Mon, 28 May 2007 15:57:57 -0300
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	Markus Rechberger <mrechberger@...il.com>
Cc:	Jiri Slaby <jirislaby@...il.com>, video4linux-list@...hat.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] V4L: stk11xx, add a new webcam driver

Em Seg, 2007-05-28 às 17:14 +0200, Markus Rechberger escreveu:

> > > +/*
> > > + * Bayer conversion
> > > + */
> >
> > We don't do format conversions in kernel. Instead, you should return a
> > proper Bayer Fourcc format (like V4L2_PIX_FMT_SBGGR8).
> >
> 
> It's ok in his case since most userspace applications do not support
> this format, it helps noone if there's a driver out there which isn't
> supported by most userspace applications and I don't expect that all
> applications will add a conversion for that format soon.
> This would moreover raise the question about a userspace library,
> though there are many more important issues which are outstanding and
> which got smashed down.

As Luca pointed, if we add conversion for one driver, we should add for
the rest. 

Instead, it would be better if Jiri sends the decoding and the rescaling
stuff as a patch to v4l2-apps/lib, starting the API decoding library.
Once we have a library, we can ask the userspace developers to use it
for the formats not recognized by their userspace apps.

Cheers,
Mauro

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/