Improved AGC update scheme for the audio backend in Chrome

media/audio/cras/cras_input.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/cras/cras_input.h"
 
 #include <math.h>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 204 matching lines @@
       latency_ts.tv_nsec / base::Time::kNanosecondsPerMicrosecond;
   double frames_latency =
       latency_usec * params_.sample_rate() / base::Time::kMicrosecondsPerSecond;
   unsigned int bytes_latency =
       static_cast<unsigned int>(frames_latency * bytes_per_frame_);
 
   // Update the AGC volume level once every second. Note that, |volume| is
   // also updated each time SetVolume() is called through IPC by the
   // render-side AGC.
   double normalized_volume = 0.0;
-  QueryAgcVolume(&normalized_volume);
+  GetAgcVolume(&normalized_volume);
 
   callback_->OnData(this,
                     buffer,
                     frames * bytes_per_frame_,
                     bytes_latency,
                     normalized_volume);
 }
 
 void CrasInputStream::NotifyStreamError(int err) {
   if (callback_)
@@ skipping 34 matching lines @@
 
 double CrasInputStream::GetVolumeRatioFromDecibels(double dB) const {
   return pow(10, dB / 20.0);
 }
 
 double CrasInputStream::GetDecibelsFromVolumeRatio(double volume_ratio) const {
   return 20 * log10(volume_ratio);
 }
 
 }  // namespace media