From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]:28808 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753937Ab2HQMrY (ORCPT ); Fri, 17 Aug 2012 08:47:24 -0400 Message-ID: <502E3D97.3090502@redhat.com> Date: Fri, 17 Aug 2012 14:48:23 +0200 From: Hans de Goede MIME-Version: 1.0 To: Hans Verkuil CC: workshop-2011@linuxtv.org, linux-media Subject: Re: V4L2 API ambiguities: workshop presentation References: <201208171235.58094.hverkuil@xs4all.nl> In-Reply-To: <201208171235.58094.hverkuil@xs4all.nl> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: Hi, On 08/17/2012 12:35 PM, Hans Verkuil wrote: > Hi all, > > I've prepared a presentation for the upcoming workshop based on my RFC and the > comments I received. > > It is available here: > > http://hverkuil.home.xs4all.nl/presentations/v4l2-workshop-2012.odp > http://hverkuil.home.xs4all.nl/presentations/v4l2-workshop-2012.pdf > > Attendees of the workshop: please review this before the workshop starts. I > want to go through this list fairly quickly (particularly slides 1-14) so we > can have more time for other topics. A note on the Pixel Aspect Ratio from me, since I won't be attending: I'm not sure if having a VIDIOC_G_PIXELASPECT is enough, it will work to get the current mode, but not for enumerating. Also it will not work with TRY_FMT, that is one cannot find out the actual pixelaspect until after a S_FMT. As mentioned in previous mail I think at a minimum the results of ENUM_FRAMESIZES should contain the pixel aspect per framesize, there is enough reserved space in the relevant structs to make this happen Regards, Hans