On Sat July 21 2012 14:16:22 Sylwester Nawrocki wrote:
> Hi Hans,
>
> On 07/17/2012 09:32 PM, Hans Verkuil wrote:
> > On Tue July 17 2012 19:30:53 Mauro Carvalho Chehab wrote:
> >> As we did in 2012, we're planning to do a media summit again at KS/2012.
> >>
> >> The KS/2012 will happen in San Diego, CA, US, between Aug 26-28, just
> >> before the LinuxCon North America.
> >>
> >> In order to do it, I'd like to know who is interested on participate,
> >> and to get proposals about what subjects will be discussed there,
> >> in order to start planning the agenda.
> >
> > I'd like to have 30 minutes to discuss a few V4L2 API ambiguities or just
> > plain weirdness, just like I did last year. I'll make an RFC issues to
> > discuss
> > beforehand. I might also have a short presentation/demo of v4l2-compliance,
> > as
> > I believe more people need to know about that utility.
>
> What do you think about adding new M2M capability flag for memory-to-memory
> video devices ? I prepared an RFC patch for that already:
> http://www.mail-archive.com/linux-media@vger.kernel.org/msg48497.html
>
> I think that at least qualifies to your list of V4L2 API ambiguities, even
> though we have device_caps now. Using ORed OUTPUT and CAPTURE flags implies
> all existing applications must check now both flags when they're trying to
> discover a video capture or video output device.
I agree. I've added to my list (which is getting pretty long BTW, I will
probably need more than 30 minutes).
When adding support for M2M devices to v4l2-compliance I also noticed that
using CAPTURE+OUTPUT is a rather awkward way to signal this capability, so
I agree to adding a special cap bit for that.
Regards,
Hans
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