The functions will be used to map a frame's QP to its optimal standard
deviation for the Gaussian kernel for the filter applied in the
automatic corruption detection algorithm.
Bug: b/358039777
Change-Id: Idb3b8cfdbd4a405151c660df87205e3949f9b085
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/359380
Commit-Queue: Fanny Linderborg <linderborg@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42777}
