shithub: libvpx

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Add "unknown" status for noise estimation.

Change-Id: I0fe95332ccfa2e1ad2a01a8e7ddd631289e0f8eb

--- a/vp9/encoder/vp9_encodeframe.c

+++ b/vp9/encoder/vp9_encodeframe.c

@@ -496,7 +496,7 @@

         threshold_base = 3 * threshold_base;

       else if (noise_level == kMedium)

         threshold_base = threshold_base << 1;

-      else if (noise_level < kLow)

+      else if (noise_level == kLowLow)

         threshold_base = (7 * threshold_base) >> 3;

     }

     if (cm->width <= 352 && cm->height <= 288) {

--- a/vp9/encoder/vp9_noise_estimate.c

+++ b/vp9/encoder/vp9_noise_estimate.c

@@ -25,7 +25,7 @@

                              int width,

                              int height) {

   ne->enabled = 0;

-  ne->level = kLowLow;

+  ne->level = kUnknown;

   ne->value = 0;

   ne->count = 0;

   ne->thresh = 90;

@@ -83,7 +83,7 @@

 }

 NOISE_LEVEL vp9_noise_estimate_extract_level(NOISE_ESTIMATE *const ne) {

-  int noise_level = kLowLow;

+  int noise_level = kUnknown;

   if (ne->value > (ne->thresh << 1)) {

     noise_level = kHigh;

   } else {

--- a/vp9/encoder/vp9_noise_estimate.h

+++ b/vp9/encoder/vp9_noise_estimate.h

@@ -24,6 +24,7 @@

 #endif

 typedef enum noise_level {

+  kUnknown,

   kLowLow,

   kLow,

   kMedium,