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

webrtc/voice_engine/audio_level.h

Index: webrtc/voice_engine/audio_level.h
diff --git a/webrtc/voice_engine/audio_level.h b/webrtc/voice_engine/audio_level.h
index 3bcb0d9b4542d85ca336a7b30f7ca8c106c000f0..caecf40689ea27f9dbceeabafde5c7d761da7772 100644
--- a/webrtc/voice_engine/audio_level.h
+++ b/webrtc/voice_engine/audio_level.h
@@ -29,11 +29,15 @@ class AudioLevel {
   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 };
@@ -44,6 +48,9 @@ class AudioLevel {
   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