Re: [ANN] Topics for a media summit in Lyon in October

[Tomasz Figa <tfiga@chromium.org>]

On Tue, Sep 3, 2019 at 4:21 PM Hans Verkuil <hverkuil@xs4all.nl> wrote:
>
> Hi all,
>
> I've decided to hold the meeting during the ELCE and not on Thursday.
> Two key people can't be there on Thursday and some travel back Thursday
> evening and so would have to leave early.
>
> Looking at the schedule I propose instead to have one meeting on
> Tuesday morning concentrating on finalizing the codec support.
>
> On Wednesday we have a second meeting for libcamera (morning) and looking
> at future V4L2 developments such as v4l2_ext_buffer/format, Request API and
> complex camera pipelines (afternoon).
>
> Laurent, it would make sense if you or one of the other libcamera devs is
> 'chairing' the libcamera meeting. Do you agree? If so, can you prepare an
> agenda for that meeting?
>
> I plan on leaving Thursday afternoon, so we have the option to continue the
> talks around that last topic on Thursday morning.
>
> I have no idea where we will hold these meetings since I've no idea
> what the conference center looks like and if they have suitable places
> for doing something like this. So I'll look around on the Monday and
> mail the details of where to meet then.
>
> Confirmed attendees:
>
> Boris Brezillon <boris.brezillon@collabora.com>
> Alexandre Courbot <acourbot@chromium.org>
> Nicolas Dufresne <nicolas@ndufresne.ca>
> Tomasz Figa <tfiga@chromium.org>
> Ezequiel Garcia <ezequiel@collabora.com>
> Eugen Hristev <Eugen.Hristev@microchip.com>
> Paul Kocialkowski <paul.kocialkowski@bootlin.com>
> Helen Koike <helen.koike@collabora.com>
> Jacopo Mondi <jacopo@jmondi.org>
> Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Hans Verkuil <hverkuil@xs4all.nl>
>
> If you are not on this list, but want to join, please let me know.
>
> Since this is really three half-day meetings, each with a different
> topic, please let me know which of those half-day meetings you want
> to attend.

Thanks Hans! I should be there on all the 3 meetings.

>
> Regards,
>
>         Hans
>
> On 8/28/19 12:55 PM, Hans Verkuil wrote:
> > On 8/16/19 10:06 AM, Hans Verkuil wrote:
> >> Rather then discussing topics for a meeting under the subject 'Lisbon'
> >> let's start a new thread referring to the right place :-)
> >>
> >> I will try to organize a room, either during the ELCE or (if that doesn't
> >> work) perhaps on the Thursday afterwards. If that's going to be a problem
> >> for someone, please let me know.
> >
> > I can only get a room for Thursday afternoon (2pm-6pm). I'm inclined to take
> > that room, but if a lot of people who want to come, will already have left
> > on the Thursday, then there is no point in me reserving this room.
> >
> > So if you are unable to attend on Thursday, then please let me know asap!
> >
> > If Thursday is no problem, then I wanted to have more informal meetings
> > somewhere in the conference center during the morning, and after lunch
> > use the room.
> >
> > If Thursday is a no-go, then we will just have to find a place inside
> > the conference center during the ELCE.
> >
> > Regards,
> >
> >       Hans
> >
> >>
> >> I do need to know how many people I can expect. I have the following
> >> confirmed attendees (and please reply if you are not listed!):
> >>
> >> Alexandre Courbot <acourbot@chromium.org>
> >> Tomasz Figa <tfiga@chromium.org>
> >> Jacopo Mondi <jacopo@jmondi.org>
> >> Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> >> Hans Verkuil <hverkuil@xs4all.nl>
> >>
> >> I know there were more who mentioned on irc that they would attend,
> >> but it is easier to keep track if I have it in an email.
> >>
> >> Topics posted under the previous thread:
> >>
> >> Tomasz:
> >>
> >> I would want to discuss various v4l2_buffer improvements, e.g.
> >> - DMA-buf import with plane offsets,
> >> - unifying the buffer structs for M and non-M formats,
> >> - ability to import different FDs with offsets for non-M formats if the
> >> layout matches driver expectations, etc.
> >>
> >> Besides that, I would be interested in the general idea on handling
> >> complex cameras in the Linux kernel in spite of the remaining V4L2
> >> limitations, e.g.
> >> - combinatorial explosion of /dev/video nodes,
> >> - significant ioctl overhead,
> >> - huge amount of historical legacy making the driver and userspace
> >> implementations overly difficult and prone to repetitive mistakes,
> >> - the above also limiting the flexibility of the API - formats, frame
> >> rates, etc. set using distinct APIs, not covered by Request API, with
> >> non-failure "negotiation hell", etc.
> >> - lack of fences, etc.
> >>
> >> Jacopo:
> >>
> >> Apart from discussing libcamera and hope we could kickstart a review of
> >> its API, I would like to re-start discussing multiplexed stream support,
> >> but that would require Sakari to be there, something I'm not certain
> >> about. Sakari?
> >>
> >> Alexandre:
> >>
> >> If Collabora/Bootlin is there, I'd certainly want to discuss stateless
> >> codecs, in particular m2m codec helpers and finalize the specification
> >> in general.
> >>
> >> Regards,
> >>
> >>      Hans
> >>
> >
>