Re: Agenda for the Edinburgh mini-summit

[Mauro Carvalho Chehab <m.chehab@samsung.com>]

Em Fri, 30 Aug 2013 15:21:05 +0200
Oliver Schinagl <oliver+list@schinagl.nl> escreveu:

> On 30-08-13 15:01, Hans Verkuil wrote:
> > OK, I know, we don't even know yet when the mini-summit will be held but I thought
> > I'd just start this thread to collect input for the agenda.
> >
> > I have these topics (and I *know* that I am forgetting a few):
> >
> > - Discuss ideas/use-cases for a property-based API. An initial discussion
> >    appeared in this thread:
> >
> >    http://permalink.gmane.org/gmane.linux.drivers.video-input-infrastructure/65195
> >
> > - What is needed to share i2c video transmitters between drm and v4l? Hopefully
> >    we will know more after the upcoming LPC.
> >
> > - Decide on how v4l2 support libraries should be organized. There is code for
> >    handling raw-to-sliced VBI decoding, ALSA looping, finding associated
> >    video/alsa nodes and for TV frequency tables. We should decide how that should
> >    be organized into libraries and how they should be documented. The first two
> >    aren't libraries at the moment, but I think they should be. The last two are
> >    libraries but they aren't installed. Some work is also being done on an improved
> >    version of the 'associating nodes' library that uses the MC if available.
> >
> > - Define the interaction between selection API, ENUM_FRAMESIZES and S_FMT. See
> >    this thread for all the nasty details:
> >
> >    http://www.spinics.net/lists/linux-media/msg65137.html
> >
> > Feel free to add suggestions to this list.

>From my side, I'd like to discuss about a better integration between DVB
and V4L2, including starting using the media controller API on DVB side
too. Btw, it would be great if we could get a status about the media
controller API usage on ALSA. I'm planning to work at such integration
soon. 

> What about a hardware accelerated decoding API/framework? Is there a 
> proper framework for this at all? I see the broadcom module is still in 
> staging and may never come out of it, but how are other video decoding 
> engines handled that don't have cameras or displays.
> 
> Reason for asking is that we from linux-sunxi have made some positive 
> progress in Reverse engineering the video decoder blob of the Allwinner 
> A10 and this knowledge will need a kernel side driver in some framework. 
> I looked at the exynos video decoders and googling for linux-media 
> hardware accelerated decoding doesn't yield much either.
> 
> Anyway, just a thought; if you think it's the wrong place for it to be 
> discussed, that's ok :)

Well, the mem2mem V4L2 devices should provide all that would be needed for
accelerated encoders/decoders. If not, then feel free to propose extensions
to fit your needs.

Regards,
Mauro

> 
> oliver
> >
> > Note: my email availability will be limited in the next three weeks, especially
> > next week, as I am travelling a lot.
> >
> > Regards,
> >
> > 	Hans
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-- 

Cheers,
Mauro