v4l2codecs: h264: Fix decoding of interlaced content
This was known not fully implemented yet, this branch is a work in progress to fix this. Notably all the DPB and reference translation need to be adapted to the fact that we have multiple pictures now.
With this branch, running fluster on Cedrus driver gives 125/135, which is slightly better then ffmpeg v4l2_request (though likely specific to ffmpeg strictness).
Edited by Nicolas Dufresne