AGC2: move fixed digital controller before limiter

Currently the fixed digital gain is applied after the input volume
controller and before the adaptive digital one. This CL moves its
application after the adaptive digital controller and before the
limiter.

Reasons:
- This change is safe: no production config where both adaptive and
  fixed digital controllers are jointly used
- More predictable behavior: when the fixed digital controller is
  used after the adaptive digital controller it is easier to describe
  the overall behavior - i.e., the fixed digital combined with the
  limiter can be used for digital compression
- Allow to remove an unwanted temporal dependency: in a follow-up CL
  the input volume controller will use the latest speech level
  estimation instead of that from the previously analyzed frame; this
  CL makes that change easier.

Bug: webrtc:7494
Change-Id: I2e9869081e0eba1e4f30f11ea93a973ca7fea28c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/286340
Reviewed-by: Hanna Silen <silen@webrtc.org>
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38813}

0 files changed, 0 insertions, 0 deletions