External denoiser based on noise estimation and moving object detection.
Improved the existing external denoiser in WebRTC: the filter strength
is adaptive based on the noise level of the whole frame and the moving
object detection result. The adaptive filter effectively removes the
artifacts in previous version, such as trailing and blockiness on moving
objects.
The external denoiser is off by default for now.
BUG=
Review URL: https://codereview.webrtc.org/1822333003
Cr-Commit-Position: refs/heads/master@{#12198}
diff --git a/webrtc/modules/video_processing/frame_preprocessor.h b/webrtc/modules/video_processing/frame_preprocessor.h
index 6dd3693..c35dd0d 100644
--- a/webrtc/modules/video_processing/frame_preprocessor.h
+++ b/webrtc/modules/video_processing/frame_preprocessor.h
@@ -71,6 +71,7 @@
VideoContentMetrics* content_metrics_;
VideoFrame denoised_frame_;
+ VideoFrame denoised_frame_prev_;
VideoFrame resampled_frame_;
VPMSpatialResampler* spatial_resampler_;
VPMContentAnalysis* ca_;