Standalone denoiser (off by default).

webrtc/modules/video_processing/util/denoiser_filter.cc

Index: webrtc/modules/video_processing/util/denoiser_filter.cc
diff --git a/webrtc/modules/video_processing/util/denoiser_filter.cc b/webrtc/modules/video_processing/util/denoiser_filter.cc
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+++ b/webrtc/modules/video_processing/util/denoiser_filter.cc
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+/*
+ *  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.
+ */
+
+#include "webrtc/modules/video_processing/util/denoiser_filter.h"
+#include "webrtc/modules/video_processing/util/denoiser_filter_c.h"
+#include "webrtc/modules/video_processing/util/denoiser_filter_neon.h"
+#include "webrtc/modules/video_processing/util/denoiser_filter_sse2.h"
+#include "webrtc/system_wrappers/include/cpu_features_wrapper.h"
+
+namespace webrtc {
+
+const int kMotionMagnitudeThreshold = 8 * 3;
+const int kSumDiffThreshold = 16 * 16 * 2;
+const int kSumDiffThresholdHigh = 600;
+
+DenoiserFilter* DenoiserFilter::Create() {
+  DenoiserFilter* filter = NULL;
+
+  // If we know the minimum architecture at compile time, avoid CPU detection.
+#if defined(WEBRTC_ARCH_X86_FAMILY)
+  // x86 CPU detection required.
+  if (WebRtc_GetCPUInfo(kSSE2)) {
+    filter =
+        new DenoiserFilterSSE2();
+  } else {
+    filter = new DenoiserFilterC();
+  }
+#elif defined(WEBRTC_DETECT_NEON)
+  if (WebRtc_GetCPUFeaturesARM() & kCPUFeatureNEON) {
+    filter = new DenoiserFilterNEON();
+  } else {
+    filter = new DenoiserFilterC();
+  }
+#else
+  filter = new DenoiserFilterC();
+#endif
+
+  return filter;
+}
+
+}  // namespace webrtc