Modifies AudioInputCallback::OnData and use media::AudioBus instead of plain byte vector (Relanding)

media/audio/agc_audio_stream.h

 // 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.
 
 #ifndef MEDIA_AUDIO_AGC_AUDIO_STREAM_H_
 #define MEDIA_AUDIO_AGC_AUDIO_STREAM_H_
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
@@ skipping 55 matching lines @@
 namespace media {
 
 template <typename AudioInterface>
 class MEDIA_EXPORT AgcAudioStream : public AudioInterface {
  public:
   // Time between two successive timer events.
   static const int kIntervalBetweenVolumeUpdatesMs = 1000;
 
   AgcAudioStream()
       : agc_is_enabled_(false), max_volume_(0.0), normalized_volume_(0.0) {
-    DVLOG(1) << __FUNCTION__;
   }
 
   virtual ~AgcAudioStream() {
     DCHECK(thread_checker_.CalledOnValidThread());
-    DVLOG(1) << __FUNCTION__;
   }
 
  protected:
   // Starts the periodic timer which periodically checks and updates the
   // current microphone volume level.
   // The timer is only started if AGC mode is first enabled using the
   // SetAutomaticGainControl() method.
   void StartAgc() {
-    DVLOG(1) << "StartAgc()";
     DCHECK(thread_checker_.CalledOnValidThread());
     if (!agc_is_enabled_ || timer_.IsRunning())
       return;
 
     // Query and cache the volume to avoid sending 0 as volume to AGC at the
     // beginning of the audio stream, otherwise AGC will try to raise the
     // volume from 0.
     QueryAndStoreNewMicrophoneVolume();
 
     timer_.Start(FROM_HERE,
         base::TimeDelta::FromMilliseconds(kIntervalBetweenVolumeUpdatesMs),
         this, &AgcAudioStream::QueryAndStoreNewMicrophoneVolume);
   }
 
   // Stops the periodic timer which periodically checks and updates the
   // current microphone volume level.
   void StopAgc() {
-    DVLOG(1) << "StopAgc()";
     DCHECK(thread_checker_.CalledOnValidThread());
     if (timer_.IsRunning())
       timer_.Stop();
   }
 
   // Stores a new microphone volume level by checking the audio input device.
   // Called on the audio manager thread.
   void UpdateAgcVolume() {
     DCHECK(thread_checker_.CalledOnValidThread());
 
@@ skipping 80 matching lines @@
 
   // Protects |normalized_volume_| .
   base::Lock lock_;
 
   DISALLOW_COPY_AND_ASSIGN(AgcAudioStream<AudioInterface>);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AGC_AUDIO_STREAM_H_