Adds Analog Gain Control (AGC) to the WebRTC client.

media/audio/fake_audio_input_stream.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/audio/fake_audio_input_stream.h"
 
 #include "base/bind.h"
 #include "media/audio/audio_manager_base.h"
 
 using base::Time;
@@ skipping 30 matching lines @@
   last_callback_time_ = Time::Now();
   thread_.Start();
   thread_.message_loop()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&FakeAudioInputStream::DoCallback, base::Unretained(this)),
       callback_interval_);
 }
 
 void FakeAudioInputStream::DoCallback() {
   DCHECK(callback_);
-  callback_->OnData(this, buffer_.get(), buffer_size_, buffer_size_);
+  callback_->OnData(this, buffer_.get(), buffer_size_, buffer_size_, 0.0);
 
   Time now = Time::Now();
   base::TimeDelta next_callback_time =
       last_callback_time_ + callback_interval_ * 2 - now;
 
   // If we are falling behind, try to catch up as much as we can in the next
   // callback.
   if (next_callback_time < base::TimeDelta())
     next_callback_time = base::TimeDelta();
 
@@ skipping 18 matching lines @@
 
 double FakeAudioInputStream::GetMaxVolume() {
   return 0.0;
 }
 
 void FakeAudioInputStream::SetVolume(double volume) {}
 
 double FakeAudioInputStream::GetVolume() {
   return 0.0;
 }
+
+void FakeAudioInputStream::SetAutomaticGainControl(bool enabled) {}
+
+bool FakeAudioInputStream::GetAutomaticGainControl() {
+  return false;
+}