Added flags for the adaptive analog AGC in audioproc_f.

Added back the 'agc2 level estimation' flag. Also added a flag for
moving the level measurement before AEC and NS. This is to run offline
experiments with audioproc_f.


Bug: webrtc:7494
Change-Id: I3e3ffceede7166b754130be2b707b620ba527e9f
Reviewed-on: https://webrtc-review.googlesource.com/97442
Reviewed-by: Alessio Bazzica <alessiob@webrtc.org>
Commit-Queue: Alex Loiko <aleloi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24657}
diff --git a/modules/audio_processing/include/audio_processing.h b/modules/audio_processing/include/audio_processing.h
index f05d7b6..e0bc85e 100644
--- a/modules/audio_processing/include/audio_processing.h
+++ b/modules/audio_processing/include/audio_processing.h
@@ -122,10 +122,12 @@
   explicit ExperimentalAgc(bool enabled) : enabled(enabled) {}
   ExperimentalAgc(bool enabled,
                   bool enabled_agc2_level_estimator,
-                  bool digital_adaptive_disabled)
+                  bool digital_adaptive_disabled,
+                  bool analyze_before_aec)
       : enabled(enabled),
         enabled_agc2_level_estimator(enabled_agc2_level_estimator),
-        digital_adaptive_disabled(digital_adaptive_disabled) {}
+        digital_adaptive_disabled(digital_adaptive_disabled),
+        analyze_before_aec(analyze_before_aec) {}
 
   ExperimentalAgc(bool enabled, int startup_min_volume)
       : enabled(enabled), startup_min_volume(startup_min_volume) {}
@@ -140,6 +142,9 @@
   int clipped_level_min = kClippedLevelMin;
   bool enabled_agc2_level_estimator = false;
   bool digital_adaptive_disabled = false;
+  // 'analyze_before_aec' is an experimental flag. It is intended to be removed
+  // at some point.
+  bool analyze_before_aec = false;
 };
 
 // Use to enable experimental noise suppression. It can be set in the