commit 103ac7e7d9c3548bf43ffa3a24b5e89689695c02
author peah <peah@webrtc.org> Wed Apr 12 05:40:55 2017 -0700
committer Commit bot <commit-bot@chromium.org> Wed Apr 12 12:40:55 2017 +0000
tree e125c8a2afc0b17c34714c8870f5e60a646937df
parent e5fd38989de6900cd32e7c88932201ec3b3467d8

AEC3 Tuning changes.

This CL adds tuning to AEC3 for the purpose of reducing the impact of
gain changes in the analog microphone gain.

BUG=chromium:710818, webrtc:6018

Review-Url: https://codereview.webrtc.org/2811283003
Cr-Commit-Position: refs/heads/master@{#17673}

webrtc/modules/audio_processing/audio_processing_impl.cc

diff --git a/webrtc/modules/audio_processing/audio_processing_impl.cc b/webrtc/modules/audio_processing/audio_processing_impl.cc
index af5e94b..816210f 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -10,6 +10,7 @@
 
 #include "webrtc/modules/audio_processing/audio_processing_impl.h"
 
+#include <math.h>
 #include <algorithm>
 
 #include "webrtc/base/checks.h"
@@ -1147,7 +1148,7 @@
   if (private_submodules_->echo_canceller3) {
     const int new_agc_level = gain_control()->stream_analog_level();
     capture_.echo_path_gain_change =
-        (capture_.previous_agc_level != new_agc_level);
+        abs(capture_.previous_agc_level - new_agc_level) > 5;
     capture_.previous_agc_level = new_agc_level;
     private_submodules_->echo_canceller3->AnalyzeCapture(capture_buffer);
   }