Refactor QualityScaler and MovingAverage

webrtc/modules/video_coding/utility/quality_scaler.h

Index: webrtc/modules/video_coding/utility/quality_scaler.h
diff --git a/webrtc/modules/video_coding/utility/quality_scaler.h b/webrtc/modules/video_coding/utility/quality_scaler.h
index 7176d4966eb46ed93c0506edd061c277d7e3f0e7..9ed017323acf38ad97f69a79362d9ee4ccec5b3b 100644
--- a/webrtc/modules/video_coding/utility/quality_scaler.h
+++ b/webrtc/modules/video_coding/utility/quality_scaler.h
@@ -48,26 +48,26 @@ class QualityScaler {
   static const int kBadH264QpThreshold;
 
  private:
-  void AdjustScale(bool up);
-  void UpdateTargetResolution(int frame_width, int frame_height);
   void ClearSamples();
-  void UpdateSampleCounts();
+  void ScaleUp();
+  void ScaleDown();
+  void UpdateTargetResolution(int width, int height);
 
   I420BufferPool pool_;
 
   size_t num_samples_downscale_;
   size_t num_samples_upscale_;
-  int measure_seconds_upscale_;
-  MovingAverage<int> average_qp_upscale_;
-  MovingAverage<int> average_qp_downscale_;
+  size_t frames_seen_;
+  bool fast_rampup_;
+  MovingAverage average_qp_;
+  MovingAverage framedrop_percent_;
 
-  int framerate_;
   int low_qp_threshold_;
   int high_qp_threshold_;
-  MovingAverage<int> framedrop_percent_;
-  Resolution res_;
+  Resolution target_res_;
 
   int downscale_shift_;
+  int maximum_shift_;
 };
 
 }  // namespace webrtc