From owner-freebsd-hackers Thu Mar 13 9:52:14 2003 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6107837B401 for ; Thu, 13 Mar 2003 09:52:13 -0800 (PST) Received: from grsu.by (grsu.by [194.158.202.115]) by mx1.FreeBSD.org (Postfix) with SMTP id 0B73B43FCB for ; Thu, 13 Mar 2003 09:52:12 -0800 (PST) (envelope-from grog@grsu.by) Received: (qmail 39759 invoked from network); 13 Mar 2003 17:50:26 -0000 Received: from unknown (HELO grsu.by) (grog@195.50.13.205) by grsu.by with SMTP; 13 Mar 2003 17:50:26 -0000 Message-ID: <3E70C20C.1060100@grsu.by> Date: Thu, 13 Mar 2003 19:38:20 +0200 From: Yury Tarasievich User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.1) Gecko/20020829 X-Accept-Language: be, en MIME-Version: 1.0 To: freebsd-hackers@freebsd.org Subject: Re: Are there any on-going projects on v4l porting? References: <20030308015609.R680@kushnir1.kiev.ua> <3E6F74AD.3000306@grsu.by> <20030312194736.GM34322@dan.emsphone.com> <20030313095141.C641@beagle.fokus.fraunhofer.de> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Performance is important, but I'd call having good design even more important, righteous API included. Having (potential) application developers mess with ioctl's and such doesn't seem good to me. Now, to not to reimplement the wheel, I'd repeat the suggestion of basically copying and adapting something for start. Further details should be kept off this list, I think, perhaps in [-multimedia]. Harti Brandt wrote: >On Wed, 12 Mar 2003, Dan Nelson wrote: > >DN>In the last episode (Mar 12), Yury Tarasievich said: >DN>> At http://freebsddvb.narod.ru, there exists an adequately up-to-date >DN>> port of linux DVB drivers, seemingly supporting DVB adapters up to >DN>> rev.1.5. >DN>> >DN>> Regarding porting of V4L. I may be utterly wrong, but isn't the whole >DN>> V4L/V4L2/V4L2-whatever thing rather made ad hoc, not really designed? >DN>> Could something reincarnating BeOS (or even OS/2) multimedia >DN>> subsystem be better? >DN> >DN>I like the idea of putting this into the Xfree86 drivers and using the >DN>XVideo extension to drive everything. that doesn't require kernel >DN>mods. It does mean that you need to start X up to capture video, >DN>though. > >The problem with this is probably the number of context switches and >copies or IPC you need to get a frame. With > 25 fps this is a problem. > >harti > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message