shithub: libvpx

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ref: d2967221d2d7689460e619ba3a6a654ca309aa1f
parent: ede323a119c0003292501c05ed900e8625aa6521
parent: 989193c797722dd2a37d481ab7cbd01a5d37270f
author: Alex Converse <aconverse@google.com>
date: Thu Oct 29 20:37:33 EDT 2015 

Merge "Make the zero handling in extend_to_full_distribution more explicit."


--- a/vp10/common/entropy.c
+++ b/vp10/common/entropy.c
@@ -403,7 +403,6 @@
   {255, 241, 243, 255, 236, 255, 252, 254},
   {255, 243, 245, 255, 237, 255, 252, 254},
   {255, 246, 247, 255, 239, 255, 253, 255},
-  {255, 246, 247, 255, 239, 255, 253, 255},
 };
 
 static const vp10_coeff_probs_model default_coef_probs_4x4[PLANE_TYPES] = {
@@ -743,7 +742,9 @@
 };
 
 static void extend_to_full_distribution(vpx_prob *probs, vpx_prob p) {
-  memcpy(probs, vp10_pareto8_full[p = 0 ? 0 : p - 1],
+  // TODO(aconverse): model[PIVOT_NODE] should never be zero.
+  // https://code.google.com/p/webm/issues/detail?id=1089
+  memcpy(probs, vp10_pareto8_full[p == 0 ? 254 : p - 1],
          MODEL_NODES * sizeof(vpx_prob));
 }
 
--- a/vp10/common/entropy.h
+++ b/vp10/common/entropy.h
@@ -153,7 +153,7 @@
 // 1, 3, 5, 7, ..., 253, 255
 // In between probabilities are interpolated linearly
 
-#define COEFF_PROB_MODELS 256
+#define COEFF_PROB_MODELS 255
 
 #define UNCONSTRAINED_NODES         3
 
--- a/vp9/common/vp9_entropy.c
+++ b/vp9/common/vp9_entropy.c
@@ -403,7 +403,6 @@
   {255, 241, 243, 255, 236, 255, 252, 254},
   {255, 243, 245, 255, 237, 255, 252, 254},
   {255, 246, 247, 255, 239, 255, 253, 255},
-  {255, 246, 247, 255, 239, 255, 253, 255},
 };
 
 static const vp9_coeff_probs_model default_coef_probs_4x4[PLANE_TYPES] = {
@@ -743,7 +742,9 @@
 };
 
 static void extend_to_full_distribution(vpx_prob *probs, vpx_prob p) {
-  memcpy(probs, vp9_pareto8_full[p = 0 ? 0 : p - 1],
+  // TODO(aconverse): model[PIVOT_NODE] should never be zero.
+  // https://code.google.com/p/webm/issues/detail?id=1089
+  memcpy(probs, vp9_pareto8_full[p == 0 ? 254 : p - 1],
          MODEL_NODES * sizeof(vpx_prob));
 }
 
--- a/vp9/common/vp9_entropy.h
+++ b/vp9/common/vp9_entropy.h
@@ -138,7 +138,7 @@
 // 1, 3, 5, 7, ..., 253, 255
 // In between probabilities are interpolated linearly
 
-#define COEFF_PROB_MODELS 256
+#define COEFF_PROB_MODELS 255
 
 #define UNCONSTRAINED_NODES         3
 
-- 
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