Add unit test for stand-alone denoiser and fixed some bugs.

webrtc/modules/video_processing/frame_preprocessor.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
 #include "webrtc/modules/video_processing/frame_preprocessor.h"
 
 namespace webrtc {
 
 VPMFramePreprocessor::VPMFramePreprocessor()
     : content_metrics_(nullptr),
       resampled_frame_(),
       enable_ca_(false),
       enable_denoising_(false),
       frame_cnt_(0) {
   spatial_resampler_ = new VPMSimpleSpatialResampler();
   ca_ = new VPMContentAnalysis(true);
   vd_ = new VPMVideoDecimator();
   if (enable_denoising_) {
-    denoiser_ = new VideoDenoiser();
+    denoiser_ = new VideoDenoiser(true);
   } else {
     denoiser_ = nullptr;
   }
 }
 
 VPMFramePreprocessor::~VPMFramePreprocessor() {
   Reset();
   delete ca_;
   delete vd_;
   if (enable_denoising_)
@@ skipping 110 matching lines @@
   }
   ++frame_cnt_;
   return VPM_OK;
 }
 
 VideoContentMetrics* VPMFramePreprocessor::ContentMetrics() const {
   return content_metrics_;
 }
 
 }  // namespace