Added offline data logpoints and logging functionality to the gain controller

webrtc/modules/audio_processing/audio_processing_impl.cc

Index: 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 12b4c949046f08ddcc3f974d26024bea7e516b54..acbc80c9ddd5742c5065fd93d5c724f0f3853c05 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -435,9 +435,6 @@ int AudioProcessingImpl::InitializeLocked() {
                       capture_audiobuffer_num_channels,
                       formats_.api_format.output_stream().num_frames()));
 
-  public_submodules_->gain_control->Initialize(num_proc_channels(),
-                                               proc_sample_rate_hz());
-
   public_submodules_->echo_cancellation->Initialize(
       proc_sample_rate_hz(), num_reverse_channels(), num_output_channels(),
       num_proc_channels());
@@ -446,6 +443,9 @@ int AudioProcessingImpl::InitializeLocked() {
   public_submodules_->echo_control_mobile->Initialize(
       proc_split_sample_rate_hz(), num_reverse_channels(),
       num_output_channels());
+

[peah-webrtc, 2016/10/28 08:37:49]

I moved the initialization of the gain_control to be closer to the
initialization of other gain control functionality to make the code easier to
read. This has no functional impact though.

+  public_submodules_->gain_control->Initialize(num_proc_channels(),
+                                               proc_sample_rate_hz());
   if (constants_.use_experimental_agc) {
     if (!private_submodules_->agc_manager.get()) {
       private_submodules_->agc_manager.reset(new AgcManagerDirect(
@@ -456,6 +456,7 @@ int AudioProcessingImpl::InitializeLocked() {
     private_submodules_->agc_manager->Initialize();
     private_submodules_->agc_manager->SetCaptureMuted(
         capture_.output_will_be_muted);
+    public_submodules_->gain_control_for_experimental_agc->Initialize();

[peah-webrtc, 2016/10/28 08:37:50]

This is needed to ensure that a new set of data dumps are created when the APM
is re-initialized. 

   }
   InitializeTransient();
   InitializeBeamformer();