Change the threshold for external VNR.

webrtc/modules/video_processing/util/noise_estimation.h

 /*
  *  Copyright (c) 2016 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_UTIL_NOISE_ESTIMATION_H_
 #define WEBRTC_MODULES_VIDEO_PROCESSING_UTIL_NOISE_ESTIMATION_H_
 
 #include <memory>
 
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/video_processing/include/video_processing_defines.h"
 #include "webrtc/modules/video_processing/util/denoiser_filter.h"
 
 namespace webrtc {
 
 #define DISPLAY 0      // Rectangle diagnostics
 #define DISPLAYNEON 0  // Rectangle diagnostics on NEON
 
-const int kNoiseThreshold = 200;
+const int kNoiseThreshold = 150;
 const int kNoiseThresholdNeon = 70;
 const int kConsecLowVarFrame = 6;
 const int kAverageLumaMin = 20;
 const int kAverageLumaMax = 220;
 const int kBlockSelectionVarMax = kNoiseThreshold << 1;
 
 // TODO(jackychen): To test different sampling strategy.
 // Collect noise data every NOISE_SUBSAMPLE_INTERVAL blocks.
 #define NOISE_SUBSAMPLE_INTERVAL 41
 
@@ skipping 19 matching lines @@
   CpuType cpu_type_;
   uint32_t noise_var_;
   double noise_var_accum_;
   double percent_static_block_;
   std::unique_ptr<uint32_t[]> consec_low_var_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_PROCESSING_UTIL_NOISE_ESTIMATION_H_