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vp8-denoiser: Update some denoiser thresholds.

Change-Id: I67090d72c0fefd3105ac380415249599e053d3bd

--- a/vp8/encoder/denoising.c

+++ b/vp8/encoder/denoising.c

@@ -23,7 +23,7 @@

  */

 static const unsigned int SSE_DIFF_THRESHOLD = 16 * 16 * 20;

 static const unsigned int SSE_THRESHOLD = 16 * 16 * 40;

-static const unsigned int SSE_THRESHOLD_HIGH = 16 * 16 * 60;

+static const unsigned int SSE_THRESHOLD_HIGH = 16 * 16 * 80;

 /*

  * The filter function was modified to reduce the computational complexity.

--- a/vp8/encoder/denoising.h

+++ b/vp8/encoder/denoising.h

@@ -18,8 +18,8 @@

 extern "C" {

 #endif

-#define SUM_DIFF_THRESHOLD (16 * 16 * 2)

-#define SUM_DIFF_THRESHOLD_HIGH (600)  // ~(16 * 16 * 1.5)

+#define SUM_DIFF_THRESHOLD 384

+#define SUM_DIFF_THRESHOLD_HIGH 512

 #define MOTION_MAGNITUDE_THRESHOLD (8*3)

 #define SUM_DIFF_THRESHOLD_UV (96)   // (8 * 8 * 1.5)