shithub: libvpx

Download patch

ref: c98bfcfbbb23dc7c8c8641831922877d0d31c67e
parent: ecf023f6e483706a4bf352b1dfcd9fb996ca4555
parent: b8b3f1a46d756bef73cb4f3cd6990a01cbacaa25
author: Deb Mukherjee <debargha@google.com>
date: Thu May 30 04:10:47 EDT 2013

Merge "Balancing coef-tree to reduce bool decodes" into experimental

--- a/configure
+++ b/configure
@@ -244,6 +244,7 @@
     multiple_arf
     non420
     alpha
+    balanced_coeftree
 "
 CONFIG_LIST="
     external_build
--- a/vp9/common/vp9_default_coef_probs.h
+++ b/vp9/common/vp9_default_coef_probs.h
@@ -11,10 +11,696 @@
 
 /*Generated file, included by vp9_entropy.c*/
 
+#if CONFIG_BALANCED_COEFTREE
 static const vp9_coeff_probs_model default_coef_probs_4x4[BLOCK_TYPES] = {
   { /* block Type 0 */
     { /* Intra */
       { /* Coeff Band 0 */
+        {   6, 213, 178 },
+        {  26, 113, 132 },
+        {  34,  17,  68 }
+      }, { /* Coeff Band 1 */
+        {  66,  96, 178 },
+        {  63,  96, 174 },
+        {  67,  54, 154 },
+        {  62,  28, 126 },
+        {  48,   9,  84 },
+        {  20,   1,  32 }
+      }, { /* Coeff Band 2 */
+        {  64, 144, 206 },
+        {  70,  99, 191 },
+        {  69,  36, 152 },
+        {  55,   9, 106 },
+        {  35,   1,  60 },
+        {  14,   1,  22 }
+      }, { /* Coeff Band 3 */
+        {  82, 154, 222 },
+        {  83, 112, 205 },
+        {  81,  31, 164 },
+        {  62,   7, 118 },
+        {  42,   1,  74 },
+        {  18,   1,  30 }
+      }, { /* Coeff Band 4 */
+        {  52, 179, 233 },
+        {  64, 132, 214 },
+        {  73,  36, 170 },
+        {  59,   8, 116 },
+        {  38,   1,  65 },
+        {  15,   1,  26 }
+      }, { /* Coeff Band 5 */
+        {  29, 175, 238 },
+        {  26, 169, 223 },
+        {  41,  80, 182 },
+        {  39,  32, 127 },
+        {  26,  10,  69 },
+        {  11,   2,  28 }
+      }
+    }, { /* Inter */
+      { /* Coeff Band 0 */
+        {  21, 226, 234 },
+        {  52, 182, 212 },
+        {  80, 112, 177 }
+      }, { /* Coeff Band 1 */
+        { 111, 164, 243 },
+        {  88, 152, 231 },
+        {  90,  43, 186 },
+        {  70,  12, 132 },
+        {  44,   2,  76 },
+        {  19,   1,  33 }
+      }, { /* Coeff Band 2 */
+        {  96, 185, 246 },
+        {  99, 127, 231 },
+        {  88,  21, 177 },
+        {  64,   5, 122 },
+        {  38,   1,  69 },
+        {  18,   1,  30 }
+      }, { /* Coeff Band 3 */
+        {  84, 206, 249 },
+        {  94, 147, 237 },
+        {  95,  33, 187 },
+        {  71,   8, 131 },
+        {  47,   1,  83 },
+        {  26,   1,  44 }
+      }, { /* Coeff Band 4 */
+        {  38, 221, 252 },
+        {  58, 177, 241 },
+        {  78,  46, 188 },
+        {  59,   9, 122 },
+        {  34,   1,  66 },
+        {  18,   1,  34 }
+      }, { /* Coeff Band 5 */
+        {  21, 216, 253 },
+        {  21, 206, 244 },
+        {  42,  93, 200 },
+        {  43,  41, 146 },
+        {  36,  13,  93 },
+        {  31,   1,  55 }
+      }
+    }
+  }, { /* block Type 1 */
+    { /* Intra */
+      { /* Coeff Band 0 */
+        {   7, 213, 219 },
+        {  23, 139, 182 },
+        {  38,  60, 125 }
+      }, { /* Coeff Band 1 */
+        {  69, 156, 220 },
+        {  52, 178, 213 },
+        {  69, 111, 190 },
+        {  69,  58, 155 },
+        {  58,  21, 104 },
+        {  39,   7,  60 }
+      }, { /* Coeff Band 2 */
+        {  68, 189, 228 },
+        {  70, 158, 221 },
+        {  83,  64, 189 },
+        {  73,  18, 141 },
+        {  48,   4,  88 },
+        {  23,   1,  41 }
+      }, { /* Coeff Band 3 */
+        {  99, 194, 236 },
+        {  91, 138, 224 },
+        {  91,  53, 189 },
+        {  74,  20, 142 },
+        {  48,   6,  90 },
+        {  22,   1,  41 }
+      }, { /* Coeff Band 4 */
+        {  52, 203, 244 },
+        {  60, 168, 231 },
+        {  75,  62, 189 },
+        {  61,  18, 132 },
+        {  38,   4,  72 },
+        {  17,   1,  39 }
+      }, { /* Coeff Band 5 */
+        {  33, 192, 247 },
+        {  31, 185, 234 },
+        {  46,  85, 185 },
+        {  39,  35, 132 },
+        {  28,  15,  80 },
+        {  13,   5,  38 }
+      }
+    }, { /* Inter */
+      { /* Coeff Band 0 */
+        {   5, 247, 246 },
+        {  28, 209, 228 },
+        {  65, 137, 203 }
+      }, { /* Coeff Band 1 */
+        {  69, 208, 250 },
+        {  54, 207, 242 },
+        {  81,  92, 204 },
+        {  70,  54, 153 },
+        {  58,  40, 108 },
+        {  58,  35,  71 }
+      }, { /* Coeff Band 2 */
+        {  65, 215, 250 },
+        {  72, 185, 239 },
+        {  92,  50, 197 },
+        {  75,  14, 147 },
+        {  49,   2,  99 },
+        {  26,   1,  53 }
+      }, { /* Coeff Band 3 */
+        {  70, 220, 251 },
+        {  76, 186, 241 },
+        {  90,  65, 198 },
+        {  75,  26, 151 },
+        {  58,  12, 112 },
+        {  34,   6,  49 }
+      }, { /* Coeff Band 4 */
+        {  34, 224, 253 },
+        {  44, 204, 245 },
+        {  69,  85, 204 },
+        {  64,  31, 150 },
+        {  44,   2,  78 },
+        {   1,   1, 128 }
+      }, { /* Coeff Band 5 */
+        {  25, 216, 253 },
+        {  21, 215, 248 },
+        {  47, 108, 214 },
+        {  47,  48, 160 },
+        {  26,  20,  90 },
+        {  64, 171, 128 }
+      }
+    }
+  }
+};
+static const vp9_coeff_probs_model default_coef_probs_8x8[BLOCK_TYPES] = {
+  { /* block Type 0 */
+    { /* Intra */
+      { /* Coeff Band 0 */
+        {   9, 203, 199 },
+        {  26,  92, 128 },
+        {  28,  11,  55 }
+      }, { /* Coeff Band 1 */
+        {  99,  54, 160 },
+        {  78,  99, 155 },
+        {  80,  44, 138 },
+        {  71,  17, 115 },
+        {  51,   5,  80 },
+        {  27,   1,  40 }
+      }, { /* Coeff Band 2 */
+        { 135,  81, 190 },
+        { 113,  61, 182 },
+        {  93,  16, 153 },
+        {  70,   4, 115 },
+        {  41,   1,  68 },
+        {  16,   1,  27 }
+      }, { /* Coeff Band 3 */
+        { 155, 103, 214 },
+        { 129,  48, 199 },
+        {  95,  10, 159 },
+        {  63,   1, 110 },
+        {  32,   1,  58 },
+        {  12,   1,  21 }
+      }, { /* Coeff Band 4 */
+        { 163, 149, 231 },
+        { 137,  69, 213 },
+        {  95,  11, 164 },
+        {  62,   3, 108 },
+        {  32,   1,  57 },
+        {  13,   1,  22 }
+      }, { /* Coeff Band 5 */
+        { 136, 189, 239 },
+        { 123, 102, 223 },
+        {  97,  19, 170 },
+        {  66,   4, 111 },
+        {  38,   1,  60 },
+        {  18,   1,  26 }
+      }
+    }, { /* Inter */
+      { /* Coeff Band 0 */
+        {  24, 226, 244 },
+        {  54, 178, 211 },
+        {  80,  74, 152 }
+      }, { /* Coeff Band 1 */
+        { 145, 153, 236 },
+        { 101, 163, 223 },
+        { 108,  50, 187 },
+        {  90,  22, 145 },
+        {  66,   8,  97 },
+        {  42,   4,  50 }
+      }, { /* Coeff Band 2 */
+        { 150, 159, 238 },
+        { 128,  90, 218 },
+        {  94,   9, 163 },
+        {  64,   3, 110 },
+        {  34,   1,  61 },
+        {  13,   1,  24 }
+      }, { /* Coeff Band 3 */
+        { 151, 162, 242 },
+        { 135,  80, 222 },
+        {  93,   9, 166 },
+        {  61,   3, 111 },
+        {  31,   1,  59 },
+        {  12,   1,  22 }
+      }, { /* Coeff Band 4 */
+        { 161, 170, 245 },
+        { 140,  84, 228 },
+        {  99,   8, 174 },
+        {  64,   1, 116 },
+        {  34,   1,  63 },
+        {  14,   1,  26 }
+      }, { /* Coeff Band 5 */
+        { 138, 197, 246 },
+        { 127, 109, 233 },
+        { 100,  16, 179 },
+        {  66,   3, 119 },
+        {  37,   1,  66 },
+        {  16,   1,  30 }
+      }
+    }
+  }, { /* block Type 1 */
+    { /* Intra */
+      { /* Coeff Band 0 */
+        {   6, 216, 212 },
+        {  25, 134, 171 },
+        {  43,  48, 118 }
+      }, { /* Coeff Band 1 */
+        {  93, 112, 209 },
+        {  66, 159, 206 },
+        {  82,  78, 184 },
+        {  75,  28, 148 },
+        {  46,   4,  82 },
+        {  18,   1,  28 }
+      }, { /* Coeff Band 2 */
+        { 108, 148, 220 },
+        {  90, 130, 216 },
+        {  92,  40, 186 },
+        {  73,  10, 135 },
+        {  46,   1,  79 },
+        {  20,   1,  35 }
+      }, { /* Coeff Band 3 */
+        { 125, 173, 232 },
+        { 109, 117, 223 },
+        {  97,  31, 183 },
+        {  71,   7, 127 },
+        {  44,   1,  76 },
+        {  21,   1,  36 }
+      }, { /* Coeff Band 4 */
+        { 133, 195, 236 },
+        { 112, 121, 224 },
+        {  97,  23, 178 },
+        {  69,   3, 122 },
+        {  42,   1,  72 },
+        {  19,   1,  34 }
+      }, { /* Coeff Band 5 */
+        { 132, 180, 238 },
+        { 119, 102, 225 },
+        { 101,  18, 179 },
+        {  71,   3, 124 },
+        {  42,   1,  70 },
+        {  17,   1,  28 }
+      }
+    }, { /* Inter */
+      { /* Coeff Band 0 */
+        {   5, 242, 250 },
+        {  26, 198, 226 },
+        {  58,  98, 168 }
+      }, { /* Coeff Band 1 */
+        {  82, 201, 246 },
+        {  50, 219, 237 },
+        {  94, 107, 205 },
+        {  89,  61, 167 },
+        {  77,  31, 131 },
+        {  57,  14,  91 }
+      }, { /* Coeff Band 2 */
+        {  99, 202, 247 },
+        {  96, 165, 234 },
+        { 100,  31, 190 },
+        {  72,   8, 131 },
+        {  41,   1,  72 },
+        {  14,   1,  24 }
+      }, { /* Coeff Band 3 */
+        { 108, 204, 248 },
+        { 107, 156, 235 },
+        { 103,  27, 186 },
+        {  71,   4, 124 },
+        {  39,   1,  66 },
+        {  14,   1,  19 }
+      }, { /* Coeff Band 4 */
+        { 120, 211, 248 },
+        { 118, 149, 234 },
+        { 107,  19, 182 },
+        {  72,   3, 126 },
+        {  40,   1,  69 },
+        {  16,   1,  24 }
+      }, { /* Coeff Band 5 */
+        { 127, 199, 245 },
+        { 122, 125, 232 },
+        { 112,  20, 186 },
+        {  82,   3, 136 },
+        {  55,   1,  88 },
+        {  10,   1,  38 }
+      }
+    }
+  }
+};
+static const vp9_coeff_probs_model default_coef_probs_16x16[BLOCK_TYPES] = {
+  { /* block Type 0 */
+    { /* Intra */
+      { /* Coeff Band 0 */
+        {  25,   9, 101 },
+        {  25,   2,  67 },
+        {  15,   1,  28 }
+      }, { /* Coeff Band 1 */
+        {  67,  30, 118 },
+        {  61,  56, 116 },
+        {  60,  31, 105 },
+        {  52,  11,  85 },
+        {  34,   2,  54 },
+        {  14,   1,  22 }
+      }, { /* Coeff Band 2 */
+        { 107,  58, 149 },
+        {  92,  53, 147 },
+        {  78,  14, 123 },
+        {  56,   3,  87 },
+        {  35,   1,  56 },
+        {  17,   1,  27 }
+      }, { /* Coeff Band 3 */
+        { 142,  61, 171 },
+        { 111,  30, 162 },
+        {  80,   4, 128 },
+        {  53,   1,  87 },
+        {  31,   1,  52 },
+        {  14,   1,  24 }
+      }, { /* Coeff Band 4 */
+        { 171,  73, 200 },
+        { 129,  28, 184 },
+        {  86,   3, 140 },
+        {  54,   1,  90 },
+        {  28,   1,  49 },
+        {  12,   1,  21 }
+      }, { /* Coeff Band 5 */
+        { 193, 129, 227 },
+        { 148,  28, 200 },
+        {  90,   2, 144 },
+        {  53,   1,  90 },
+        {  28,   1,  50 },
+        {  13,   1,  22 }
+      }
+    }, { /* Inter */
+      { /* Coeff Band 0 */
+        {  60,   7, 234 },
+        {  64,   4, 184 },
+        {  56,   1, 104 }
+      }, { /* Coeff Band 1 */
+        { 150, 111, 210 },
+        {  87, 185, 202 },
+        { 101,  81, 177 },
+        {  90,  34, 142 },
+        {  67,  11,  95 },
+        {  38,   2,  51 }
+      }, { /* Coeff Band 2 */
+        { 153, 139, 218 },
+        { 120,  72, 195 },
+        {  90,  11, 147 },
+        {  63,   3, 101 },
+        {  39,   1,  61 },
+        {  20,   1,  33 }
+      }, { /* Coeff Band 3 */
+        { 171, 132, 223 },
+        { 131,  56, 200 },
+        {  92,   6, 147 },
+        {  58,   1,  95 },
+        {  32,   1,  52 },
+        {  14,   1,  23 }
+      }, { /* Coeff Band 4 */
+        { 183, 137, 227 },
+        { 139,  48, 204 },
+        {  91,   3, 148 },
+        {  55,   1,  91 },
+        {  28,   1,  47 },
+        {  13,   1,  21 }
+      }, { /* Coeff Band 5 */
+        { 198, 149, 234 },
+        { 153,  32, 208 },
+        {  95,   2, 148 },
+        {  55,   1,  90 },
+        {  30,   1,  51 },
+        {  16,   1,  25 }
+      }
+    }
+  }, { /* block Type 1 */
+    { /* Intra */
+      { /* Coeff Band 0 */
+        {   7, 209, 217 },
+        {  31, 106, 151 },
+        {  40,  21,  86 }
+      }, { /* Coeff Band 1 */
+        { 101,  71, 184 },
+        {  74, 131, 177 },
+        {  88,  50, 158 },
+        {  78,  16, 129 },
+        {  51,   2,  82 },
+        {  18,   1,  29 }
+      }, { /* Coeff Band 2 */
+        { 116, 115, 199 },
+        { 102,  88, 191 },
+        {  94,  22, 160 },
+        {  74,   6, 122 },
+        {  47,   1,  77 },
+        {  18,   1,  30 }
+      }, { /* Coeff Band 3 */
+        { 157, 124, 210 },
+        { 130,  53, 201 },
+        { 102,  10, 165 },
+        {  73,   1, 120 },
+        {  42,   1,  69 },
+        {  16,   1,  27 }
+      }, { /* Coeff Band 4 */
+        { 174, 147, 225 },
+        { 134,  67, 212 },
+        { 100,  10, 168 },
+        {  66,   1, 111 },
+        {  36,   1,  60 },
+        {  16,   1,  27 }
+      }, { /* Coeff Band 5 */
+        { 185, 165, 232 },
+        { 147,  56, 214 },
+        { 105,   5, 165 },
+        {  66,   1, 108 },
+        {  35,   1,  59 },
+        {  16,   1,  27 }
+      }
+    }, { /* Inter */
+      { /* Coeff Band 0 */
+        {   3, 232, 245 },
+        {  18, 162, 210 },
+        {  38,  64, 131 }
+      }, { /* Coeff Band 1 */
+        {  84, 187, 239 },
+        {  35, 231, 231 },
+        {  82, 150, 209 },
+        {  87,  97, 181 },
+        {  81,  64, 151 },
+        {  67,  60, 119 }
+      }, { /* Coeff Band 2 */
+        { 107, 185, 239 },
+        { 100, 149, 224 },
+        { 107,  34, 185 },
+        {  83,  12, 141 },
+        {  49,   4,  92 },
+        {  21,   1,  40 }
+      }, { /* Coeff Band 3 */
+        { 125, 184, 243 },
+        { 121, 127, 228 },
+        { 113,  25, 185 },
+        {  82,   6, 134 },
+        {  48,   1,  82 },
+        {  26,   1,  38 }
+      }, { /* Coeff Band 4 */
+        { 143, 185, 245 },
+        { 133, 115, 231 },
+        { 114,  14, 184 },
+        {  77,   3, 126 },
+        {  43,   1,  68 },
+        {  34,   1,  40 }
+      }, { /* Coeff Band 5 */
+        { 170, 194, 241 },
+        { 151,  80, 226 },
+        { 118,   9, 180 },
+        {  81,   1, 130 },
+        {  51,   1,  78 },
+        {  18,   1,  49 }
+      }
+    }
+  }
+};
+static const vp9_coeff_probs_model default_coef_probs_32x32[BLOCK_TYPES] = {
+  { /* block Type 0 */
+    { /* Intra */
+      { /* Coeff Band 0 */
+        {  29,  42, 137 },
+        {  26,   3,  60 },
+        {  13,   1,  23 }
+      }, { /* Coeff Band 1 */
+        {  69,  36, 122 },
+        {  63,  57, 123 },
+        {  60,  33, 112 },
+        {  52,  11,  90 },
+        {  32,   2,  52 },
+        {  10,   1,  15 }
+      }, { /* Coeff Band 2 */
+        { 107,  55, 143 },
+        {  86,  69, 143 },
+        {  74,  24, 116 },
+        {  52,   5,  78 },
+        {  29,   1,  44 },
+        {  12,   1,  18 }
+      }, { /* Coeff Band 3 */
+        { 137,  71, 160 },
+        { 107,  34, 152 },
+        {  73,   6, 114 },
+        {  44,   1,  69 },
+        {  25,   1,  40 },
+        {  12,   1,  18 }
+      }, { /* Coeff Band 4 */
+        { 165,  70, 174 },
+        { 118,  24, 159 },
+        {  74,   3, 117 },
+        {  45,   1,  73 },
+        {  26,   1,  43 },
+        {  12,   1,  19 }
+      }, { /* Coeff Band 5 */
+        { 220,  93, 223 },
+        { 153,  10, 187 },
+        {  86,   2, 131 },
+        {  49,   1,  79 },
+        {  26,   1,  43 },
+        {  12,   1,  20 }
+      }
+    }, { /* Inter */
+      { /* Coeff Band 0 */
+        {  30,  58, 227 },
+        {  35,  10, 172 },
+        {  24,  23, 112 }
+      }, { /* Coeff Band 1 */
+        { 117, 145, 219 },
+        {  51, 221, 216 },
+        {  75, 169, 196 },
+        {  88,  96, 165 },
+        {  77,  43, 117 },
+        {  53,  18,  60 }
+      }, { /* Coeff Band 2 */
+        { 128, 176, 225 },
+        { 108, 114, 202 },
+        {  92,  19, 152 },
+        {  65,   4, 103 },
+        {  38,   1,  61 },
+        {  19,   1,  30 }
+      }, { /* Coeff Band 3 */
+        { 146, 184, 228 },
+        { 122,  95, 205 },
+        {  92,  11, 149 },
+        {  62,   1,  98 },
+        {  35,   1,  57 },
+        {  17,   1,  26 }
+      }, { /* Coeff Band 4 */
+        { 165, 192, 230 },
+        { 132,  81, 206 },
+        {  93,   6, 147 },
+        {  58,   1,  94 },
+        {  32,   1,  52 },
+        {  15,   1,  24 }
+      }, { /* Coeff Band 5 */
+        { 204, 223, 234 },
+        { 156,  49, 204 },
+        {  97,   3, 145 },
+        {  59,   1,  92 },
+        {  33,   1,  52 },
+        {  15,   1,  24 }
+      }
+    }
+  }, { /* block Type 1 */
+    { /* Intra */
+      { /* Coeff Band 0 */
+        {   7, 184, 200 },
+        {  25,  67, 113 },
+        {  30,   9,  59 }
+      }, { /* Coeff Band 1 */
+        {  92,  42, 158 },
+        {  65, 121, 159 },
+        {  77,  56, 146 },
+        {  70,  22, 120 },
+        {  47,   4,  76 },
+        {  18,   1,  26 }
+      }, { /* Coeff Band 2 */
+        { 113,  81, 177 },
+        {  96,  75, 167 },
+        {  84,  24, 136 },
+        {  63,   8, 100 },
+        {  37,   1,  58 },
+        {  13,   1,  19 }
+      }, { /* Coeff Band 3 */
+        { 147,  85, 194 },
+        { 119,  36, 178 },
+        {  88,   8, 139 },
+        {  59,   1,  93 },
+        {  31,   1,  49 },
+        {  10,   1,  18 }
+      }, { /* Coeff Band 4 */
+        { 169, 108, 210 },
+        { 131,  41, 191 },
+        {  92,   5, 144 },
+        {  56,   1,  88 },
+        {  29,   1,  47 },
+        {  14,   1,  22 }
+      }, { /* Coeff Band 5 */
+        { 210, 106, 223 },
+        { 148,  14, 192 },
+        {  89,   2, 138 },
+        {  52,   1,  84 },
+        {  29,   1,  47 },
+        {  14,   1,  23 }
+      }
+    }, { /* Inter */
+      { /* Coeff Band 0 */
+        {   3, 207, 245 },
+        {  12, 102, 213 },
+        {  18,  33, 144 }
+      }, { /* Coeff Band 1 */
+        {  85, 205, 245 },
+        {  18, 249, 242 },
+        {  59, 221, 229 },
+        {  91, 166, 213 },
+        {  88, 117, 183 },
+        {  70,  95, 149 }
+      }, { /* Coeff Band 2 */
+        { 114, 193, 241 },
+        { 104, 155, 221 },
+        { 100,  33, 181 },
+        {  78,  10, 132 },
+        {  43,   2,  75 },
+        {  15,   1,  48 }
+      }, { /* Coeff Band 3 */
+        { 118, 198, 244 },
+        { 117, 142, 224 },
+        { 111,  25, 179 },
+        {  83,   4, 134 },
+        {  57,   1,  84 },
+        {   1,   1,   1 }
+      }, { /* Coeff Band 4 */
+        { 144, 201, 248 },
+        { 136, 130, 234 },
+        { 124,  12, 188 },
+        {  83,   1, 130 },
+        {  61,   1,  66 },
+        {  64, 171, 128 }
+      }, { /* Coeff Band 5 */
+        { 174, 227, 250 },
+        { 165, 118, 242 },
+        { 132,  21, 197 },
+        {  84,   3, 134 },
+        {  70,   1,  69 },
+        {   1,   1,   1 }
+      }
+    }
+  }
+};
+#else
+static const vp9_coeff_probs_model default_coef_probs_4x4[BLOCK_TYPES] = {
+  { /* block Type 0 */
+    { /* Intra */
+      { /* Coeff Band 0 */
         { 208,  32, 178,},
         { 102,  43, 132,},
         {  15,  36,  68,}
@@ -695,3 +1381,4 @@
     }
   }
 };
+#endif
--- a/vp9/common/vp9_entropy.c
+++ b/vp9/common/vp9_entropy.c
@@ -201,11 +201,16 @@
 
 const vp9_tree_index vp9_coef_tree[ 22] =     /* corresponding _CONTEXT_NODEs */
 {
-  -DCT_EOB_TOKEN, 2,                        /* 0 = EOB */
-  -ZERO_TOKEN, 4,                           /* 1 = ZERO */
-  -ONE_TOKEN, 6,                            /* 2 = ONE */
-  8, 12,                                    /* 3 = LOW_VAL */
-  -TWO_TOKEN, 10,                           /* 4 = TWO */
+#if CONFIG_BALANCED_COEFTREE
+  -ZERO_TOKEN, 2,                             /* 0 = ZERO */
+  -DCT_EOB_TOKEN, 4,                          /* 1 = EOB  */
+#else
+  -DCT_EOB_TOKEN, 2,                          /* 0 = EOB */
+  -ZERO_TOKEN, 4,                             /* 1 = ZERO */
+#endif
+  -ONE_TOKEN, 6,                              /* 2 = ONE */
+  8, 12,                                      /* 3 = LOW_VAL */
+  -TWO_TOKEN, 10,                            /* 4 = TWO */
   -THREE_TOKEN, -FOUR_TOKEN,                /* 5 = THREE */
   14, 16,                                   /* 6 = HIGH_LOW */
   -DCT_VAL_CATEGORY1, -DCT_VAL_CATEGORY2,   /* 7 = CAT_ONE */
@@ -229,9 +234,14 @@
 };
 
 const vp9_tree_index vp9_coefmodel_tree[6] = {
+#if CONFIG_BALANCED_COEFTREE
+  -ZERO_TOKEN, 2,
+  -DCT_EOB_MODEL_TOKEN, 4,
+#else
   -DCT_EOB_MODEL_TOKEN, 2,                      /* 0 = EOB */
   -ZERO_TOKEN, 4,                               /* 1 = ZERO */
-  -ONE_TOKEN, -TWO_TOKEN,                       /* 2 = ONE */
+#endif
+  -ONE_TOKEN, -TWO_TOKEN,
 };
 
 // Model obtained from a 2-sided zero-centerd distribuition derived
@@ -690,8 +700,13 @@
               vp9_coefmodel_tree,
               coef_probs, branch_ct,
               coef_counts[i][j][k][l], 0);
+#if CONFIG_BALANCED_COEFTREE
+          branch_ct[1][1] = eob_branch_count[i][j][k][l] - branch_ct[1][0];
+          coef_probs[1] = get_binary_prob(branch_ct[1][0], branch_ct[1][1]);
+#else
           branch_ct[0][1] = eob_branch_count[i][j][k][l] - branch_ct[0][0];
           coef_probs[0] = get_binary_prob(branch_ct[0][0], branch_ct[0][1]);
+#endif
           for (t = 0; t < entropy_nodes_adapt; ++t) {
             count = branch_ct[t][0] + branch_ct[t][1];
             count = count > count_sat ? count_sat : count;
--- a/vp9/common/vp9_entropy.h
+++ b/vp9/common/vp9_entropy.h
@@ -85,8 +85,7 @@
 /*# define DC_TOKEN_CONTEXTS        3*/ /* 00, 0!0, !0!0 */
 #define PREV_COEF_CONTEXTS          6
 
-// Disables backward coef probs adaption
-// #define DISABLE_COEF_ADAPT
+// #define ENTROPY_STATS
 
 typedef unsigned int vp9_coeff_count[REF_TYPES][COEF_BANDS][PREV_COEF_CONTEXTS]
                                     [MAX_ENTROPY_TOKENS];
@@ -162,6 +161,7 @@
 
 #define UNCONSTRAINED_NODES         3
 #define MODEL_NODES                 (ENTROPY_NODES - UNCONSTRAINED_NODES)
+
 #define PIVOT_NODE                  2   // which node is pivot
 
 typedef vp9_prob vp9_coeff_probs_model[REF_TYPES][COEF_BANDS]
--- a/vp9/decoder/vp9_decodframe.c
+++ b/vp9/decoder/vp9_decodframe.c
@@ -1073,9 +1073,6 @@
         if (vp9_read(&header_bc, 252))
           pc->fc.vp9_mode_contexts[i][j] = vp9_read_prob(&header_bc);
   }
-  // Is this needed ?
-  if (keyframe)
-    vp9_default_coef_probs(pc);
 
   update_frame_context(&pc->fc);
 
--- a/vp9/decoder/vp9_detokenize.c
+++ b/vp9/decoder/vp9_detokenize.c
@@ -17,8 +17,13 @@
 #include "vp9/decoder/vp9_detokenize.h"
 #include "vp9/common/vp9_seg_common.h"
 
+#if CONFIG_BALANCED_COEFTREE
+#define ZERO_CONTEXT_NODE           0
+#define EOB_CONTEXT_NODE            1
+#else
 #define EOB_CONTEXT_NODE            0
 #define ZERO_CONTEXT_NODE           1
+#endif
 #define ONE_CONTEXT_NODE            2
 #define LOW_VAL_CONTEXT_NODE        3
 #define TWO_CONTEXT_NODE            4
@@ -111,6 +116,9 @@
   const int *scan, *nb;
   uint8_t token_cache[1024];
   const uint8_t * band_translate;
+#if CONFIG_BALANCED_COEFTREE
+  int skip_eob_node = 0;
+#endif
 
   switch (txfm_size) {
     default:
@@ -182,11 +190,13 @@
                                 c, default_eob);
     band = get_coef_band(band_translate, c);
     prob = coef_probs[band][pt];
+#if !CONFIG_BALANCED_COEFTREE
     fc->eob_branch_counts[txfm_size][type][ref][band][pt]++;
     if (!vp9_read(r, prob[EOB_CONTEXT_NODE]))
       break;
 
 SKIP_START:
+#endif
     if (c >= seg_eob)
       break;
     if (c)
@@ -198,8 +208,22 @@
     if (!vp9_read(r, prob[ZERO_CONTEXT_NODE])) {
       INCREMENT_COUNT(ZERO_TOKEN);
       ++c;
+#if CONFIG_BALANCED_COEFTREE
+      skip_eob_node = 1;
+      continue;
+#else
       goto SKIP_START;
+#endif
     }
+#if CONFIG_BALANCED_COEFTREE
+    if (!skip_eob_node) {
+      fc->eob_branch_counts[txfm_size][type][ref][band][pt]++;
+      if (!vp9_read(r, prob[EOB_CONTEXT_NODE]))
+        break;
+    }
+    skip_eob_node = 0;
+#endif
+
     // ONE_CONTEXT_NODE_0_
     if (!vp9_read(r, prob[ONE_CONTEXT_NODE])) {
       WRITE_COEF_CONTINUE(1, ONE_TOKEN);
--- a/vp9/encoder/vp9_bitstream.c
+++ b/vp9/encoder/vp9_bitstream.c
@@ -473,7 +473,6 @@
     const vp9_prob *pp;
     int v = a->value;
     int n = a->len;
-    int ncount = n;
     vp9_prob probs[ENTROPY_NODES];
 
     if (t == EOSB_TOKEN) {
@@ -489,18 +488,25 @@
     assert(pp != 0);
 
     /* skip one or two nodes */
+#if !CONFIG_BALANCED_COEFTREE
     if (p->skip_eob_node) {
       n -= p->skip_eob_node;
       i = 2 * p->skip_eob_node;
-      ncount -= p->skip_eob_node;
     }
+#endif
 
     do {
       const int bb = (v >> --n) & 1;
+#if CONFIG_BALANCED_COEFTREE
+      if (i == 2 && p->skip_eob_node) {
+        i += 2;
+        assert(bb == 1);
+        continue;
+      }
+#endif
       vp9_write(bc, bb, pp[i >> 1]);
       i = vp9_coef_tree[i + bb];
-      ncount--;
-    } while (n && ncount);
+    } while (n);
 
     if (b->base_val) {
       const int e = p->extra, l = b->len;
@@ -862,8 +868,11 @@
         const MB_PREDICTION_MODE A = above_block_mode(m, i, mis);
         const MB_PREDICTION_MODE L = (xd->left_available || idx) ?
                                      left_block_mode(m, i) : DC_PRED;
-        write_kf_bmode(bc, m->bmi[i].as_mode.first,
-                       c->kf_bmode_prob[A][L]);
+        const int bm = m->bmi[i].as_mode.first;
+#ifdef ENTROPY_STATS
+        ++intra_mode_stats[A][L][bm];
+#endif
+        write_kf_bmode(bc, bm, c->kf_bmode_prob[A][L]);
       }
     }
   }
@@ -1066,11 +1075,19 @@
                                            coef_probs[i][j][k][l],
                                            coef_branch_ct[i][j][k][l],
                                            model_counts, 0);
+#if CONFIG_BALANCED_COEFTREE
+          coef_branch_ct[i][j][k][l][1][1] = eob_branch_ct[i][j][k][l] -
+                                             coef_branch_ct[i][j][k][l][1][0];
+          coef_probs[i][j][k][l][1] =
+              get_binary_prob(coef_branch_ct[i][j][k][l][1][0],
+                              coef_branch_ct[i][j][k][l][1][1]);
+#else
           coef_branch_ct[i][j][k][l][0][1] = eob_branch_ct[i][j][k][l] -
                                              coef_branch_ct[i][j][k][l][0][0];
           coef_probs[i][j][k][l][0] =
               get_binary_prob(coef_branch_ct[i][j][k][l][0][0],
                               coef_branch_ct[i][j][k][l][0][1]);
+#endif
 #ifdef ENTROPY_STATS
           if (!cpi->dummy_packing) {
             for (t = 0; t < MAX_ENTROPY_TOKENS; ++t)
--- a/vp9/encoder/vp9_block.h
+++ b/vp9/encoder/vp9_block.h
@@ -133,7 +133,11 @@
 
   unsigned char *active_ptr;
 
+  // note that token_costs is the cost when eob node is skipped
   vp9_coeff_count token_costs[TX_SIZE_MAX_SB][BLOCK_TYPES];
+#if CONFIG_BALANCED_COEFTREE
+  vp9_coeff_count token_costs_noskip[TX_SIZE_MAX_SB][BLOCK_TYPES];
+#endif
 
   int optimize;
 
--- a/vp9/encoder/vp9_boolhuff.c
+++ b/vp9/encoder/vp9_boolhuff.c
@@ -10,6 +10,7 @@
 
 #include <assert.h>
 #include "vp9/encoder/vp9_boolhuff.h"
+#include "vp9/common/vp9_entropy.h"
 
 #if defined(SECTIONBITS_OUTPUT)
 unsigned __int64 Sectionbits[500];
--- a/vp9/encoder/vp9_encodemb.c
+++ b/vp9/encoder/vp9_encodemb.c
@@ -215,10 +215,21 @@
         band = get_coef_band(band_translate, i + 1);
         pt = trellis_get_coeff_context(scan, nb, i, t0, token_cache,
                                        pad, default_eob);
+#if CONFIG_BALANCED_COEFTREE
         rate0 +=
-          mb->token_costs[tx_size][type][ref][band][pt][tokens[next][0].token];
+          mb->token_costs_noskip[tx_size][type][ref][band][pt]
+                                [tokens[next][0].token];
         rate1 +=
-          mb->token_costs[tx_size][type][ref][band][pt][tokens[next][1].token];
+          mb->token_costs_noskip[tx_size][type][ref][band][pt]
+                                [tokens[next][1].token];
+#else
+        rate0 +=
+          mb->token_costs[tx_size][type][ref][band][pt]
+                         [tokens[next][0].token];
+        rate1 +=
+          mb->token_costs[tx_size][type][ref][band][pt]
+                         [tokens[next][1].token];
+#endif
       }
       UPDATE_RD_COST();
       /* And pick the best. */
@@ -266,14 +277,32 @@
         if (t0 != DCT_EOB_TOKEN) {
           pt = trellis_get_coeff_context(scan, nb, i, t0, token_cache,
                                          pad, default_eob);
+#if CONFIG_BALANCED_COEFTREE
+          if (!x)
+            rate0 += mb->token_costs[tx_size][type][ref][band][pt][
+                tokens[next][0].token];
+          else
+            rate0 += mb->token_costs_noskip[tx_size][type][ref][band][pt][
+                tokens[next][0].token];
+#else
           rate0 += mb->token_costs[tx_size][type][ref][band][pt][
               tokens[next][0].token];
+#endif
         }
         if (t1 != DCT_EOB_TOKEN) {
           pt = trellis_get_coeff_context(scan, nb, i, t1, token_cache,
                                          pad, default_eob);
+#if CONFIG_BALANCED_COEFTREE
+          if (!x)
+            rate1 += mb->token_costs[tx_size][type][ref][band][pt][
+                tokens[next][1].token];
+          else
+            rate1 += mb->token_costs_noskip[tx_size][type][ref][band][pt][
+                tokens[next][1].token];
+#else
           rate1 += mb->token_costs[tx_size][type][ref][band][pt][
               tokens[next][1].token];
+#endif
         }
       }
 
@@ -326,8 +355,13 @@
   error1 = tokens[next][1].error;
   t0 = tokens[next][0].token;
   t1 = tokens[next][1].token;
+#if CONFIG_BALANCED_COEFTREE
+  rate0 += mb->token_costs_noskip[tx_size][type][ref][band][pt][t0];
+  rate1 += mb->token_costs_noskip[tx_size][type][ref][band][pt][t1];
+#else
   rate0 += mb->token_costs[tx_size][type][ref][band][pt][t0];
   rate1 += mb->token_costs[tx_size][type][ref][band][pt][t1];
+#endif
   UPDATE_RD_COST();
   best = rd_cost1 < rd_cost0;
   final_eob = i0 - 1;
--- a/vp9/encoder/vp9_onyx_if.c
+++ b/vp9/encoder/vp9_onyx_if.c
@@ -284,7 +284,6 @@
   set_default_lf_deltas(cpi);
 }
 
-
 static void dealloc_compressor_data(VP9_COMP *cpi) {
   // Delete sementation map
   vpx_free(cpi->segmentation_map);
@@ -2935,9 +2934,6 @@
 #endif
 
     // transform / motion compensation build reconstruction frame
-    if (cm->frame_type == KEY_FRAME) {
-      vp9_default_coef_probs(cm);
-    }
 
     vp9_encode_frame(cpi);
 
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -108,11 +108,12 @@
   {SPLITMV,   GOLDEN_FRAME, ALTREF_FRAME},
 };
 
+#if CONFIG_BALANCED_COEFTREE
 static void fill_token_costs(vp9_coeff_count *c,
+                             vp9_coeff_count *cnoskip,
                              vp9_coeff_probs_model *p,
                              TX_SIZE tx_size) {
   int i, j, k, l;
-
   for (i = 0; i < BLOCK_TYPES; i++)
     for (j = 0; j < REF_TYPES; j++)
       for (k = 0; k < COEF_BANDS; k++)
@@ -119,10 +120,30 @@
         for (l = 0; l < PREV_COEF_CONTEXTS; l++) {
           vp9_prob probs[ENTROPY_NODES];
           vp9_model_to_full_probs(p[i][j][k][l], probs);
+          vp9_cost_tokens((int *)cnoskip[i][j][k][l], probs,
+                          vp9_coef_tree);
+          // Replace the eob node prob with a very small value so that the
+          // cost approximately equals the cost without the eob node
+          probs[1] = 1;
+          vp9_cost_tokens((int *)c[i][j][k][l], probs, vp9_coef_tree);
+        }
+}
+#else
+static void fill_token_costs(vp9_coeff_count *c,
+                             vp9_coeff_probs_model *p,
+                             TX_SIZE tx_size) {
+  int i, j, k, l;
+  for (i = 0; i < BLOCK_TYPES; i++)
+    for (j = 0; j < REF_TYPES; j++)
+      for (k = 0; k < COEF_BANDS; k++)
+        for (l = 0; l < PREV_COEF_CONTEXTS; l++) {
+          vp9_prob probs[ENTROPY_NODES];
+          vp9_model_to_full_probs(p[i][j][k][l], probs);
           vp9_cost_tokens_skip((int *)c[i][j][k][l], probs,
                                vp9_coef_tree);
         }
 }
+#endif
 
 static int rd_iifactor[32] =  { 4, 4, 3, 2, 1, 0, 0, 0,
                                 0, 0, 0, 0, 0, 0, 0, 0,
@@ -213,14 +234,29 @@
     }
   }
 
+#if CONFIG_BALANCED_COEFTREE
   fill_token_costs(cpi->mb.token_costs[TX_4X4],
+                   cpi->mb.token_costs_noskip[TX_4X4],
                    cpi->common.fc.coef_probs_4x4, TX_4X4);
   fill_token_costs(cpi->mb.token_costs[TX_8X8],
+                   cpi->mb.token_costs_noskip[TX_8X8],
                    cpi->common.fc.coef_probs_8x8, TX_8X8);
   fill_token_costs(cpi->mb.token_costs[TX_16X16],
+                   cpi->mb.token_costs_noskip[TX_16X16],
                    cpi->common.fc.coef_probs_16x16, TX_16X16);
   fill_token_costs(cpi->mb.token_costs[TX_32X32],
+                   cpi->mb.token_costs_noskip[TX_32X32],
                    cpi->common.fc.coef_probs_32x32, TX_32X32);
+#else
+  fill_token_costs(cpi->mb.token_costs[TX_4X4],
+                   cpi->common.fc.coef_probs_4x4, TX_4X4);
+  fill_token_costs(cpi->mb.token_costs[TX_8X8],
+                   cpi->common.fc.coef_probs_8x8, TX_8X8);
+  fill_token_costs(cpi->mb.token_costs[TX_16X16],
+                   cpi->common.fc.coef_probs_16x16, TX_16X16);
+  fill_token_costs(cpi->mb.token_costs[TX_32X32],
+                   cpi->common.fc.coef_probs_32x32, TX_32X32);
+#endif
 
   for (i = 0; i < NUM_PARTITION_CONTEXTS; i++)
     vp9_cost_tokens(cpi->mb.partition_cost[i],
@@ -274,7 +310,13 @@
   TX_TYPE tx_type = DCT_DCT;
 
   const int segment_id = xd->mode_info_context->mbmi.segment_id;
+#if CONFIG_BALANCED_COEFTREE
+  unsigned int (*token_costs_noskip)[PREV_COEF_CONTEXTS][MAX_ENTROPY_TOKENS] =
+      mb->token_costs_noskip[tx_size][type][ref];
+#else
   vp9_prob coef_probs[COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES];
+#endif
+
   int seg_eob, default_eob;
   uint8_t token_cache[1024];
   const uint8_t * band_translate;
@@ -294,8 +336,10 @@
           get_tx_type_4x4(xd, block) : DCT_DCT;
       above_ec = A[0] != 0;
       left_ec = L[0] != 0;
+#if !CONFIG_BALANCED_COEFTREE
       vp9_model_to_full_probs_sb(cm->fc.coef_probs_4x4[type][ref],
                                  coef_probs);
+#endif
       seg_eob = 16;
       scan = get_scan_4x4(tx_type);
       band_translate = vp9_coefband_trans_4x4;
@@ -310,8 +354,10 @@
       above_ec = (A[0] + A[1]) != 0;
       left_ec = (L[0] + L[1]) != 0;
       scan = get_scan_8x8(tx_type);
+#if !CONFIG_BALANCED_COEFTREE
       vp9_model_to_full_probs_sb(cm->fc.coef_probs_8x8[type][ref],
                                  coef_probs);
+#endif
       seg_eob = 64;
       band_translate = vp9_coefband_trans_8x8plus;
       break;
@@ -323,8 +369,10 @@
       TX_TYPE tx_type = (type == PLANE_TYPE_Y_WITH_DC) ?
           get_tx_type_16x16(xd, y + (x >> 2)) : DCT_DCT;
       scan = get_scan_16x16(tx_type);
+#if !CONFIG_BALANCED_COEFTREE
       vp9_model_to_full_probs_sb(cm->fc.coef_probs_16x16[type][ref],
                                  coef_probs);
+#endif
       seg_eob = 256;
       above_ec = (A[0] + A[1] + A[2] + A[3]) != 0;
       left_ec = (L[0] + L[1] + L[2] + L[3]) != 0;
@@ -333,8 +381,10 @@
     }
     case TX_32X32:
       scan = vp9_default_scan_32x32;
+#if !CONFIG_BALANCED_COEFTREE
       vp9_model_to_full_probs_sb(cm->fc.coef_probs_32x32[type][ref],
                                  coef_probs);
+#endif
       seg_eob = 1024;
       above_ec = (A[0] + A[1] + A[2] + A[3] + A[4] + A[5] + A[6] + A[7]) != 0;
       left_ec = (L[0] + L[1] + L[2] + L[3] + L[4] + L[5] + L[6] + L[7]) != 0;
@@ -365,18 +415,30 @@
       if (c)
         pt = vp9_get_coef_context(scan, nb, pad, token_cache, c, default_eob);
 
+#if CONFIG_BALANCED_COEFTREE
+      if (!c || token_cache[scan[c - 1]])  // do not skip eob
+        cost += token_costs_noskip[band][pt][t] + vp9_dct_value_cost_ptr[v];
+      else
+        cost += token_costs[band][pt][t] + vp9_dct_value_cost_ptr[v];
+#else
       cost += token_costs[band][pt][t] + vp9_dct_value_cost_ptr[v];
-
       if (!c || token_cache[scan[c - 1]])
         cost += vp9_cost_bit(coef_probs[band][pt][0], 1);
+#endif
       token_cache[scan[c]] = vp9_pt_energy_class[t];
     }
     if (c < seg_eob) {
       if (c)
         pt = vp9_get_coef_context(scan, nb, pad, token_cache, c, default_eob);
+#if CONFIG_BALANCED_COEFTREE
+      cost += mb->token_costs_noskip[tx_size][type][ref]
+          [get_coef_band(band_translate, c)]
+          [pt][DCT_EOB_TOKEN];
+#else
       cost += mb->token_costs[tx_size][type][ref]
           [get_coef_band(band_translate, c)]
           [pt][DCT_EOB_TOKEN];
+#endif
     }
   }
 
--- a/vp9/encoder/vp9_tokenize.c
+++ b/vp9/encoder/vp9_tokenize.c
@@ -224,11 +224,21 @@
     t->token = token;
     t->context_tree = coef_probs[type][ref][band][pt];
     t->skip_eob_node = (c > 0) && (token_cache[scan[c - 1]] == 0);
+
+#if CONFIG_BALANCED_COEFTREE
+    assert(token <= ZERO_TOKEN ||
+           vp9_coef_encodings[t->token].len - t->skip_eob_node > 0);
+#else
     assert(vp9_coef_encodings[t->token].len - t->skip_eob_node > 0);
+#endif
 
     if (!dry_run) {
       ++counts[type][ref][band][pt][token];
+#if CONFIG_BALANCED_COEFTREE
+      if (!t->skip_eob_node && token > ZERO_TOKEN)
+#else
       if (!t->skip_eob_node)
+#endif
         ++cpi->common.fc.eob_branch_counts[tx_size][type][ref][band][pt];
     }
     token_cache[scan[c]] = vp9_pt_energy_class[token];
--