feat : threaded camera and renderer

[garuna-m6]

This is a sample for bifurcating threads for reading and rendering (its behind main so will close this), setting a reference on this (though sometimes the reading of self.frame object is very fast that it is assigned to None ,not handled case in reneder), was able to hit ~200fps fetching from camera (numpy images) in local

[Davidy22]

I see the following trace on start:

Traceback (most recent call last):
File "main.py", line 48, in <module>

screen.draw_next_frame()
File "/home/davidoso/.local/lib/python3.8/site-packages/asciimatics/screen.py", line 1669, in 
effect.update(self.File "/home/davidoso/.local/lib/python3.8/site-packages/asciimatics/effects.py", line 71, in update
self._update(frame_no)
File "/home/davidoso/.local/lib/python3.8/site-packages/asciimatics/effects.py", line 343, in _updateimage, colours = self._renderer.rendered_text
TypeError: cannot unpack non-iterable NoneType object

Only asciimatics effect in the program is the webcam, so there's a None coming out of the thread at some point

[garuna-m6]

yeah the last frame is coming out to be None, was trying to debug this but unable to complete yesterday night, don't think will be able to integrate it 😢