Added basic framework for AEC3 in the audio processing module

webrtc/modules/audio_processing/echo_cancellation_impl.cc

Index: webrtc/modules/audio_processing/echo_cancellation_impl.cc
diff --git a/webrtc/modules/audio_processing/echo_cancellation_impl.cc b/webrtc/modules/audio_processing/echo_cancellation_impl.cc
index f6a0bcde7acc801c7014e5f73bce9be8e8f61d5b..25cb8c02283230855536fbcdb987baf383475d84 100644
--- a/webrtc/modules/audio_processing/echo_cancellation_impl.cc
+++ b/webrtc/modules/audio_processing/echo_cancellation_impl.cc
@@ -341,14 +341,9 @@ bool EchoCancellationImpl::is_delay_agnostic_enabled() const {
   return delay_agnostic_enabled_;
 }
 
-bool EchoCancellationImpl::is_aec3_enabled() const {
-  rtc::CritScope cs(crit_capture_);
-  return aec3_enabled_;
-}
-
 std::string EchoCancellationImpl::GetExperimentsDescription() {
   rtc::CritScope cs(crit_capture_);
-  std::string description = (aec3_enabled_ ? "AEC3;" : "");
+  std::string description = "";

[aleloi, 2016/12/09 13:30:04]

Maybe change body to ternary operator one-liner?

[peah-webrtc, 2016/12/12 19:46:46]

Good point!
Done.

   if (refined_adaptive_filter_enabled_) {
     description += "RefinedAdaptiveFilter;";
   }
@@ -473,7 +468,6 @@ void EchoCancellationImpl::SetExtraOptions(const webrtc::Config& config) {
     delay_agnostic_enabled_ = config.Get<DelayAgnostic>().enabled;
     refined_adaptive_filter_enabled_ =
         config.Get<RefinedAdaptiveFilter>().enabled;
-    aec3_enabled_ = config.Get<EchoCanceller3>().enabled;
   }
   Configure();
 }
@@ -493,8 +487,6 @@ int EchoCancellationImpl::Configure() {
                                      extended_filter_enabled_ ? 1 : 0);
     WebRtcAec_enable_delay_agnostic(WebRtcAec_aec_core(canceller->state()),
                                     delay_agnostic_enabled_ ? 1 : 0);
-    WebRtcAec_enable_aec3(WebRtcAec_aec_core(canceller->state()),
-                          aec3_enabled_ ? 1 : 0);

[aleloi, 2016/12/09 13:30:04]

The member aec3_enabled_ is not used any longer, so there is no need for it.

[peah-webrtc, 2016/12/12 19:46:46]

Done.

     WebRtcAec_enable_refined_adaptive_filter(
         WebRtcAec_aec_core(canceller->state()),
         refined_adaptive_filter_enabled_);