[libcamera-devel] [RFC 0/4] prototype python bindings

[Tomi Valkeinen]

Hi,

I have continued this work, and my latest branch is available at:

https://github.com/tomba/libcamera py

Don't look at the history, it's full of "some work" commit messages, as I'm still experimenting with
different approaches.

Some of the changes since the first version:

- move under src/
- add pybind11 via meson subproject
- the binding covers much more of the libcamera API
- simplecamera.py, an attempt to expose a single-stream simple-to-use camera class
- qtest.sh, show the captured images with Qt, and show camera controls as sliders, using simplecamera.py

Mainly tested with vimc, and a bit with vivid and my laptop's camera.

 Tomi

On 18/09/2020 18:20, Tomi Valkeinen wrote:
> Hi,
> 
> Laurent asked me to send these to get discussions about the challenges
> on the list (rather than in private chats...).
> 
> This is a prototype, RFC, hack, whatever you want to call it, but it
> works for me for the small subset of features used in test.py.
> 
> The main patch "libcamera python bindings" has some questions/issues
> listed in the description, and I've added comments to the code where I'm
> not sure where to go.
> 
> There were no submodules in libcamera, so I used the same convention
> I've used in kms++: ext/<submodule>. pybind11 could be added as
> something that comes from the system (at least Ubuntu 20.04 has it), but
> as it's header only, I think having it as a submodule is the easiest and
> most manageable way to add it.
> 
>  Tomi
> 
> Tomi Valkeinen (4):
>   Add pybind11 submodule
>   Add BoundMethodFunction
>   hack: Camera public destructor
>   libcamera python bindings
> 
>  .gitmodules                      |   3 +
>  ext/pybind11                     |   1 +
>  include/libcamera/bound_method.h |  25 +++++
>  include/libcamera/camera.h       |   2 +-
>  include/libcamera/signal.h       |   6 ++
>  meson.build                      |   1 +
>  meson_options.txt                |   2 +
>  py/meson.build                   |   1 +
>  py/pycamera/__init__.py          |  29 +++++
>  py/pycamera/meson.build          |  35 ++++++
>  py/pycamera/pymain.cpp           | 169 +++++++++++++++++++++++++++++
>  py/test/run-valgrind.sh          |   3 +
>  py/test/run.sh                   |   3 +
>  py/test/test.py                  | 177 +++++++++++++++++++++++++++++++
>  py/test/valgrind-pycamera.supp   |  17 +++
>  15 files changed, 473 insertions(+), 1 deletion(-)
>  create mode 100644 .gitmodules
>  create mode 160000 ext/pybind11
>  create mode 100644 py/meson.build
>  create mode 100644 py/pycamera/__init__.py
>  create mode 100644 py/pycamera/meson.build
>  create mode 100644 py/pycamera/pymain.cpp
>  create mode 100755 py/test/run-valgrind.sh
>  create mode 100755 py/test/run.sh
>  create mode 100755 py/test/test.py
>  create mode 100644 py/test/valgrind-pycamera.supp
>