Standalone denoiser (off by default).

webrtc/modules/video_processing/video_processing.gypi

Index: webrtc/modules/video_processing/video_processing.gypi
diff --git a/webrtc/modules/video_processing/video_processing.gypi b/webrtc/modules/video_processing/video_processing.gypi
index 25e2097007f5f01bb9e3c23ec23047fa3a16f00f..efc5af3c0c4d7500dafca8a9e8f22dbbc6f5f573 100644
--- a/webrtc/modules/video_processing/video_processing.gypi
+++ b/webrtc/modules/video_processing/video_processing.gypi
@@ -36,11 +36,20 @@
         'video_decimator.h',
         'video_processing_impl.cc',
         'video_processing_impl.h',
+        'video_denoiser.cc',
+        'video_denoiser.h',
+        'util/denoiser_filter.cc',
+        'util/denoiser_filter.h',
+        'util/skin_detection.cc',
+        'util/skin_detection.h',
       ],
       'conditions': [
         ['target_arch=="ia32" or target_arch=="x64"', {
           'dependencies': [ 'video_processing_sse2', ],
         }],
+        ['target_arch=="arm" or target_arch == "arm64"', {
+          'dependencies': [ 'video_processing_neon', ],
+        }],
       ],
     },
   ],
@@ -52,6 +61,8 @@
           'type': 'static_library',
           'sources': [
             'content_analysis_sse2.cc',
+            'util/denoiser_filter_sse2.cc',
+            'util/denoiser_filter_sse2.h',
           ],
           'conditions': [
             ['os_posix==1 and OS!="mac"', {
@@ -66,6 +77,19 @@
         },
       ],
     }],
+    ['target_arch=="arm" or target_arch == "arm64"', {
+      'targets': [
+        {
+          'target_name': 'video_processing_neon',
+          'type': 'static_library',
+          'includes': [ '../../build/arm_neon.gypi', ],
+          'sources': [
+            'util/denoiser_filter_neon.cc',
+            'util/denoiser_filter_neon.h',
+          ],
+        },
+      ],
+    }],
   ],
 }