This CL adds an interface for a generic PostProcessing module that
is optionally added to the APM at construction time.
(Parenthetically this CL also adds a missing lock check to
InitializeGainController2.)
Bug: webrtc:8201
Change-Id: I7de64cf8d5335ecec450da8a961660906141d42a
Reviewed-on: https://webrtc-review.googlesource.com/1570
Commit-Queue: Sam Zackrisson <saza@webrtc.org>
Reviewed-by: Per Åhgren <peah@webrtc.org>
Reviewed-by: Alex Loiko <aleloi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19973}
0beac583bb