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

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
index a5819905b2ab3de107c87e2523db5888465fd81b..d21d030a2b1b9ae2187a3a3500241e3576d6f879 100644
--- a/webrtc/modules/video_processing/util/denoiser_filter.cc
+++ b/webrtc/modules/video_processing/util/denoiser_filter.cc
@@ -20,27 +20,31 @@ const int kMotionMagnitudeThreshold = 8 * 3;
 const int kSumDiffThreshold = 16 * 16 * 2;
 const int kSumDiffThresholdHigh = 600;
 
-DenoiserFilter* DenoiserFilter::Create() {
+DenoiserFilter* DenoiserFilter::Create(bool runtime_cpu_detection) {
   DenoiserFilter* filter = NULL;
 
-  // If we know the minimum architecture at compile time, avoid CPU detection.
+  if (runtime_cpu_detection) {
+    // 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();
-  }
+    // x86 CPU detection required.
+    if (WebRtc_GetCPUInfo(kSSE2)) {
+      filter =
+          new DenoiserFilterSSE2();

[stefan-webrtc, 2015/12/10 08:53:25]

Indentation, run git cl format.

[jackychen, 2015/12/11 19:57:56]

Done.

+    } else {
+      filter = new DenoiserFilterC();
+    }
 #elif defined(WEBRTC_DETECT_NEON)
-  if (WebRtc_GetCPUFeaturesARM() & kCPUFeatureNEON) {
-    filter = new DenoiserFilterNEON();
+    if (WebRtc_GetCPUFeaturesARM() & kCPUFeatureNEON) {
+      filter = new DenoiserFilterNEON();
+    } else {
+      filter = new DenoiserFilterC();
+    }
+#else
+    filter = new DenoiserFilterC();
+#endif
   } else {
     filter = new DenoiserFilterC();
   }
-#else
-  filter = new DenoiserFilterC();
-#endif
 
   return filter;
 }