commit 2bd85ab03921101da5807e0e40c545b5d7ed22ba
author Per Åhgren <peah@webrtc.org> Fri Jan 03 10:36:34 2020 +0100
committer Commit Bot <commit-bot@chromium.org> Fri Jan 03 10:47:14 2020 +0000
tree 7cb20abc7b0557e0216b3ababc60aa7dce0dacff
parent 83ee98292f2b179e2d38cc4043b02238aa2236db

Avoid AGC2 runtime allocation and activate it on demand

This CL ensures that the AGC2 is created and initialized only when
needed.

Apart from that, the CL also avoids a runtime-reallocation that happens
each time the setting is applied.

Bug: webrtc:5298
Change-Id: Iad9eaa05a3d0baa0788cd11b2aa17ddd8e0c509b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/163987
Commit-Queue: Per Åhgren <peah@webrtc.org>
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30139}

modules/audio_processing/gain_controller2.cc

diff --git a/modules/audio_processing/gain_controller2.cc b/modules/audio_processing/gain_controller2.cc
index 7cff82d..8c764f8 100644
--- a/modules/audio_processing/gain_controller2.cc
+++ b/modules/audio_processing/gain_controller2.cc
@@ -27,8 +27,11 @@
           new ApmDataDumper(rtc::AtomicOps::Increment(&instance_count_))),
       gain_applier_(/*hard_clip_samples=*/false,
                     /*initial_gain_factor=*/0.f),
-      adaptive_agc_(new AdaptiveAgc(data_dumper_.get())),
-      limiter_(static_cast<size_t>(48000), data_dumper_.get(), "Agc2") {}
+      limiter_(static_cast<size_t>(48000), data_dumper_.get(), "Agc2") {
+  if (config_.adaptive_digital.enabled) {
+    adaptive_agc_.reset(new AdaptiveAgc(data_dumper_.get()));
+  }
+}
 
 GainController2::~GainController2() = default;
 
@@ -47,14 +50,14 @@
                                     audio->num_frames());
   // Apply fixed gain first, then the adaptive one.
   gain_applier_.ApplyGain(float_frame);
-  if (config_.adaptive_digital.enabled) {
+  if (adaptive_agc_) {
     adaptive_agc_->Process(float_frame, limiter_.LastAudioLevel());
   }
   limiter_.Process(float_frame);
 }
 
 void GainController2::NotifyAnalogLevel(int level) {
-  if (analog_level_ != level && config_.adaptive_digital.enabled) {
+  if (analog_level_ != level && adaptive_agc_) {
     adaptive_agc_->Reset();
   }
   analog_level_ = level;
@@ -72,7 +75,11 @@
     limiter_.Reset();
   }
   gain_applier_.SetGainFactor(DbToRatio(config_.fixed_digital.gain_db));
-  adaptive_agc_.reset(new AdaptiveAgc(data_dumper_.get(), config_));
+  if (config_.adaptive_digital.enabled) {
+    adaptive_agc_.reset(new AdaptiveAgc(data_dumper_.get(), config_));
+  } else {
+    adaptive_agc_.reset();
+  }
 }
 
 bool GainController2::Validate(