Move total audio energy and duration tracking to AudioLevel and protect with existing critial secti…

webrtc/voice_engine/audio_level.h

 /*
  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 11 matching lines @@
 class AudioLevel {
  public:
   AudioLevel();
   ~AudioLevel();
 
   // Called on "API thread(s)" from APIs like VoEBase::CreateChannel(),
   // VoEBase::StopSend(), VoEVolumeControl::GetSpeechOutputLevel().
   int8_t Level() const;
   int16_t LevelFullRange() const;
   void Clear();
+  // See the description for "totalAudioEnergy" in the WebRTC stats spec
+  // (https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamtrackstats-totalaudioenergy)
+  double TotalEnergy() const;
+  double TotalDuration() const;
 
   // Called on a native capture audio thread (platform dependent) from the
   // AudioTransport::RecordedDataIsAvailable() callback.
   // In Chrome, this method is called on the AudioInputDevice thread.
-  void ComputeLevel(const AudioFrame& audioFrame);
+  void ComputeLevel(const AudioFrame& audioFrame, double duration);
 
  private:
   enum { kUpdateFrequency = 10 };
 
   rtc::CriticalSection crit_sect_;
 
   int16_t abs_max_;
   int16_t count_;
   int8_t current_level_;
   int16_t current_level_full_range_;
+
+  double total_energy_ = 0.0;
+  double total_duration_ = 0.0;
 };
 
 }  // namespace voe
 }  // namespace webrtc
 
 #endif  // WEBRTC_VOICE_ENGINE_AUDIO_LEVEL_H_