External VNR speed improvement and more.

webrtc/modules/video_processing/video_denoiser.h

 /*
  *  Copyright (c) 2015 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.
  */
 
 #ifndef WEBRTC_MODULES_VIDEO_PROCESSING_VIDEO_DENOISER_H_
 #define WEBRTC_MODULES_VIDEO_PROCESSING_VIDEO_DENOISER_H_
 
 #include <memory>
 
 #include "webrtc/modules/video_processing/util/denoiser_filter.h"
 #include "webrtc/modules/video_processing/util/noise_estimation.h"
 #include "webrtc/modules/video_processing/util/skin_detection.h"
 
 namespace webrtc {
 
 class VideoDenoiser {
  public:
   explicit VideoDenoiser(bool runtime_cpu_detection);
   void DenoiseFrame(const VideoFrame& frame,
                     VideoFrame* denoised_frame,
-                    VideoFrame* denoised_frame_track,
-                    int noise_level_prev);
+                    VideoFrame* denoised_frame_prev,
+                    bool noise_estimation_enabled);
 
  private:
   int width_;
   int height_;
   CpuType cpu_type_;
-  std::unique_ptr<DenoiseMetrics[]> metrics_;
   std::unique_ptr<DenoiserFilter> filter_;
   std::unique_ptr<NoiseEstimation> ne_;
   std::unique_ptr<uint8_t[]> d_status_;
-#if EXPERIMENTAL
-  std::unique_ptr<uint8_t[]> d_status_tmp1_;
-  std::unique_ptr<uint8_t[]> d_status_tmp2_;
-#endif
+  std::unique_ptr<uint8_t[]> d_status_red_;

[marpan, 2016/04/11 19:16:44]

why not use a better name here? 
does red mean moving edge block?

[jackychen_, 2016/04/12 17:02:53]

Done.

   std::unique_ptr<uint8_t[]> x_density_;
   std::unique_ptr<uint8_t[]> y_density_;
+  std::unique_ptr<DenoiserDecision[]> mb_filter_decision_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_PROCESSING_VIDEO_DENOISER_H_