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}