Test and improve libcamera driver

[anxuae]

No description provided.

[codecov-commenter]

Codecov Report

Merging #462 (9405ea7) into 3.x (b4927d0) will increase coverage by 1.19%.
The diff coverage is 66.66%.

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@@            Coverage Diff             @@
##              3.x     #462      +/-   ##
==========================================
+ Coverage   54.19%   55.39%   +1.19%     
==========================================
  Files          52       52              
  Lines        4362     4403      +41     
==========================================
+ Hits         2364     2439      +75     
+ Misses       1998     1964      -34     

Files	Coverage Δ
pibooth/camera/hybrid.py	100.00% <100.00%> (+17.30%)	⬆️
pibooth/pictures/sizing.py	86.20% <100.00%> (+0.24%)	⬆️
pibooth/view/base.py	40.90% <100.00%> (ø)
pibooth/view/nogui/window.py	43.39% <100.00%> (ø)
pibooth/view/pygame/scenes/capture.py	65.38% <100.00%> (ø)
pibooth/view/pygame/scenes/choose.py	83.90% <100.00%> (+0.18%)	⬆️
pibooth/view/pygame/scenes/chosen.py	81.81% <100.00%> (+0.86%)	⬆️
pibooth/view/pygame/scenes/failsafe.py	60.00% <100.00%> (+4.44%)	⬆️
pibooth/view/pygame/scenes/preview.py	94.44% <100.00%> (+0.32%)	⬆️
pibooth/view/pygame/scenes/processing.py	100.00% <100.00%> (ø)
... and 14 more

... and 1 file with indirect coverage changes

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