[libcamera-devel] GSoC 2023

[Paul Elder]

On Wed, Feb 22, 2023 at 09:46:58PM +0530, Prashanth S via libcamera-devel wrote:
> Hello Kieran,
> 
> Thank you for your reply.
> 
> > The project will require building kernel modules (or the whole kernel)
> > and making developments against libcamera.
> > Do you have any experience building a linux kernel? or modules? If not -
> > that's a good place to start investigating.
> I have experience building Linux kernel and dynamic modules.
> 
> > For warmup tasks, see if you can get the existing developments rebased
> > and working and see if you can identify what would be next.
> >
> > See
> >  - https://patchwork.libcamera.org/project/libcamera/list/?series=1127
> > and
> > - https://lore.kernel.org/linux-media/
> 20200819180442.11630-1-kgupta at es.iitr.ac.in/
> I tried to build the libcamera source and run the qcam application. I was able
> to see the captured frames (from the integrated webcam) in the qcam application
> (which uses libcamera library build).
> 
> Warmup Tasks:
> I am trying to enable vimc in the libcamera build (I have not used the meson
> build system before).
> I also tried to load the vimc module (modprobe vimc) and capture frames from
> the vimc device file (/dev/video<3/4/5>) using the default application in
> ubuntu (application name: cheese). But I got an error.

Cheese directly with vimc device nodes won't work, so that's fine.

> I will try to apply the corresponding patches to the linux kernel and
> libcamera.

The kernel shouldn't need to be patched, but you'll have to enable the
vimc module. libcamera should just work too (of course, the vimc
pipeline handler + ipa will need to be enabled).

It's multistream support that needs to be added, but getting both the
kernel and libcamera to build+run is a simple and required first step.


Paul

> 
> On Wed, 22 Feb 2023 at 20:55, Kieran Bingham <kieran.bingham at ideasonboard.com>
> wrote:
> 
>     Hello Prashanth.
> 
>     Quoting Prashanth S via libcamera-devel (2023-02-22 05:36:44)
>     > Hi All,
>     >
>     > I would like to contribute to libcamera as part of GSoC 2023.
>     >
>     > I looked through the project ideas (https://libcamera.org/
>     open-projects.html
>     > ).
>     > I like to choose *vimc multistream support* project.
>     >
>     > I am trying to do the warmup tasks.
>     >
>     > May I ask for suggestions on vimc multistream support project?
> 
>     The project will require building kernel modules (or the whole kernel)
>     and making developments against libcamera.
> 
>     Do you have any experience building a linux kernel? or modules? If not -
>     that's a good place to start investigating.
> 
>     For warmup tasks, see if you can get the existing developments rebased
>     and working and see if you can identify what would be next.
> 
>     See
>      - https://patchwork.libcamera.org/project/libcamera/list/?series=1127
>     and
>      - https://lore.kernel.org/linux-media/
>     20200819180442.11630-1-kgupta at es.iitr.ac.in/
> 
>     --
>     Regards
> 
>     Kieran
> 
> 
>     >
>     > Regards
>     > Prashanth S
>