Drop costing ANS tokens from derived probabilities

This mimics what's currently done in aom/master. This can be re-added
after aligning AOM's ANS with nextgenv2's ANS.

Change-Id: I3ae62181dd4803694204a234c717a86a15ca8a40
diff --git a/av1/encoder/cost.c b/av1/encoder/cost.c
index 9a2ac8e..e3151a5 100644
--- a/av1/encoder/cost.c
+++ b/av1/encoder/cost.c
@@ -11,9 +11,6 @@
 #include <assert.h>
 
 #include "av1/encoder/cost.h"
-#if CONFIG_ANS
-#include "aom_dsp/ans.h"
-#endif  // CONFIG_ANS
 #include "av1/common/entropy.h"
 
 /* round(-log2(i/256.) * (1 << AV1_PROB_COST_SHIFT))
@@ -41,91 +38,6 @@
   26,   23,   20,   18,   15,   12,   9,    6,    3
 };
 
-#if CONFIG_ANS
-// round(-log2(i/1024.) * (1 << AV1_PROB_COST_SHIFT))
-static const uint16_t av1_prob_cost10[1024] = {
-  5120, 5120, 4608, 4308, 4096, 3931, 3796, 3683, 3584, 3497, 3419, 3349, 3284,
-  3225, 3171, 3120, 3072, 3027, 2985, 2945, 2907, 2871, 2837, 2804, 2772, 2742,
-  2713, 2685, 2659, 2633, 2608, 2583, 2560, 2537, 2515, 2494, 2473, 2453, 2433,
-  2414, 2395, 2377, 2359, 2342, 2325, 2308, 2292, 2276, 2260, 2245, 2230, 2216,
-  2201, 2187, 2173, 2160, 2147, 2134, 2121, 2108, 2096, 2083, 2071, 2060, 2048,
-  2037, 2025, 2014, 2003, 1992, 1982, 1971, 1961, 1951, 1941, 1931, 1921, 1911,
-  1902, 1892, 1883, 1874, 1865, 1856, 1847, 1838, 1830, 1821, 1813, 1804, 1796,
-  1788, 1780, 1772, 1764, 1756, 1748, 1741, 1733, 1726, 1718, 1711, 1704, 1697,
-  1689, 1682, 1675, 1668, 1661, 1655, 1648, 1641, 1635, 1628, 1622, 1615, 1609,
-  1602, 1596, 1590, 1584, 1578, 1571, 1565, 1559, 1554, 1548, 1542, 1536, 1530,
-  1525, 1519, 1513, 1508, 1502, 1497, 1491, 1486, 1480, 1475, 1470, 1465, 1459,
-  1454, 1449, 1444, 1439, 1434, 1429, 1424, 1419, 1414, 1409, 1404, 1399, 1395,
-  1390, 1385, 1380, 1376, 1371, 1367, 1362, 1357, 1353, 1348, 1344, 1340, 1335,
-  1331, 1326, 1322, 1318, 1313, 1309, 1305, 1301, 1297, 1292, 1288, 1284, 1280,
-  1276, 1272, 1268, 1264, 1260, 1256, 1252, 1248, 1244, 1240, 1236, 1233, 1229,
-  1225, 1221, 1218, 1214, 1210, 1206, 1203, 1199, 1195, 1192, 1188, 1185, 1181,
-  1177, 1174, 1170, 1167, 1163, 1160, 1156, 1153, 1149, 1146, 1143, 1139, 1136,
-  1133, 1129, 1126, 1123, 1119, 1116, 1113, 1110, 1106, 1103, 1100, 1097, 1094,
-  1090, 1087, 1084, 1081, 1078, 1075, 1072, 1069, 1066, 1062, 1059, 1056, 1053,
-  1050, 1047, 1044, 1042, 1039, 1036, 1033, 1030, 1027, 1024, 1021, 1018, 1015,
-  1013, 1010, 1007, 1004, 1001, 998,  996,  993,  990,  987,  985,  982,  979,
-  977,  974,  971,  968,  966,  963,  960,  958,  955,  953,  950,  947,  945,
-  942,  940,  937,  934,  932,  929,  927,  924,  922,  919,  917,  914,  912,
-  909,  907,  904,  902,  899,  897,  895,  892,  890,  887,  885,  883,  880,
-  878,  876,  873,  871,  868,  866,  864,  861,  859,  857,  855,  852,  850,
-  848,  845,  843,  841,  839,  836,  834,  832,  830,  828,  825,  823,  821,
-  819,  817,  814,  812,  810,  808,  806,  804,  801,  799,  797,  795,  793,
-  791,  789,  787,  785,  783,  780,  778,  776,  774,  772,  770,  768,  766,
-  764,  762,  760,  758,  756,  754,  752,  750,  748,  746,  744,  742,  740,
-  738,  736,  734,  732,  730,  728,  726,  724,  723,  721,  719,  717,  715,
-  713,  711,  709,  707,  706,  704,  702,  700,  698,  696,  694,  693,  691,
-  689,  687,  685,  683,  682,  680,  678,  676,  674,  673,  671,  669,  667,
-  665,  664,  662,  660,  658,  657,  655,  653,  651,  650,  648,  646,  644,
-  643,  641,  639,  637,  636,  634,  632,  631,  629,  627,  626,  624,  622,
-  621,  619,  617,  616,  614,  612,  611,  609,  607,  606,  604,  602,  601,
-  599,  598,  596,  594,  593,  591,  590,  588,  586,  585,  583,  582,  580,
-  578,  577,  575,  574,  572,  571,  569,  567,  566,  564,  563,  561,  560,
-  558,  557,  555,  554,  552,  550,  549,  547,  546,  544,  543,  541,  540,
-  538,  537,  535,  534,  532,  531,  530,  528,  527,  525,  524,  522,  521,
-  519,  518,  516,  515,  513,  512,  511,  509,  508,  506,  505,  503,  502,
-  501,  499,  498,  496,  495,  493,  492,  491,  489,  488,  486,  485,  484,
-  482,  481,  480,  478,  477,  475,  474,  473,  471,  470,  469,  467,  466,
-  465,  463,  462,  460,  459,  458,  456,  455,  454,  452,  451,  450,  448,
-  447,  446,  444,  443,  442,  441,  439,  438,  437,  435,  434,  433,  431,
-  430,  429,  428,  426,  425,  424,  422,  421,  420,  419,  417,  416,  415,
-  414,  412,  411,  410,  409,  407,  406,  405,  404,  402,  401,  400,  399,
-  397,  396,  395,  394,  392,  391,  390,  389,  387,  386,  385,  384,  383,
-  381,  380,  379,  378,  377,  375,  374,  373,  372,  371,  369,  368,  367,
-  366,  365,  364,  362,  361,  360,  359,  358,  356,  355,  354,  353,  352,
-  351,  349,  348,  347,  346,  345,  344,  343,  341,  340,  339,  338,  337,
-  336,  335,  333,  332,  331,  330,  329,  328,  327,  326,  324,  323,  322,
-  321,  320,  319,  318,  317,  316,  314,  313,  312,  311,  310,  309,  308,
-  307,  306,  305,  303,  302,  301,  300,  299,  298,  297,  296,  295,  294,
-  293,  292,  291,  289,  288,  287,  286,  285,  284,  283,  282,  281,  280,
-  279,  278,  277,  276,  275,  274,  273,  272,  271,  269,  268,  267,  266,
-  265,  264,  263,  262,  261,  260,  259,  258,  257,  256,  255,  254,  253,
-  252,  251,  250,  249,  248,  247,  246,  245,  244,  243,  242,  241,  240,
-  239,  238,  237,  236,  235,  234,  233,  232,  231,  230,  229,  228,  227,
-  226,  225,  224,  223,  222,  221,  220,  219,  218,  217,  216,  215,  214,
-  213,  212,  212,  211,  210,  209,  208,  207,  206,  205,  204,  203,  202,
-  201,  200,  199,  198,  197,  196,  195,  194,  194,  193,  192,  191,  190,
-  189,  188,  187,  186,  185,  184,  183,  182,  181,  181,  180,  179,  178,
-  177,  176,  175,  174,  173,  172,  171,  170,  170,  169,  168,  167,  166,
-  165,  164,  163,  162,  161,  161,  160,  159,  158,  157,  156,  155,  154,
-  153,  152,  152,  151,  150,  149,  148,  147,  146,  145,  145,  144,  143,
-  142,  141,  140,  139,  138,  138,  137,  136,  135,  134,  133,  132,  132,
-  131,  130,  129,  128,  127,  126,  125,  125,  124,  123,  122,  121,  120,
-  120,  119,  118,  117,  116,  115,  114,  114,  113,  112,  111,  110,  109,
-  109,  108,  107,  106,  105,  104,  104,  103,  102,  101,  100,  99,   99,
-  98,   97,   96,   95,   95,   94,   93,   92,   91,   90,   90,   89,   88,
-  87,   86,   86,   85,   84,   83,   82,   82,   81,   80,   79,   78,   78,
-  77,   76,   75,   74,   74,   73,   72,   71,   70,   70,   69,   68,   67,
-  66,   66,   65,   64,   63,   62,   62,   61,   60,   59,   59,   58,   57,
-  56,   55,   55,   54,   53,   52,   52,   51,   50,   49,   48,   48,   47,
-  46,   45,   45,   44,   43,   42,   42,   41,   40,   39,   38,   38,   37,
-  36,   35,   35,   34,   33,   32,   32,   31,   30,   29,   29,   28,   27,
-  26,   26,   25,   24,   23,   23,   22,   21,   20,   20,   19,   18,   18,
-  17,   16,   15,   15,   14,   13,   12,   12,   11,   10,   9,    9,    8,
-  7,    7,    6,    5,    4,    4,    3,    2,    1,    1
-};
-#endif  // CONFIG_ANS
-
 static void cost(int *costs, aom_tree tree, const aom_prob *probs, int i,
                  int c) {
   const aom_prob prob = probs[i / 2];
@@ -143,20 +55,6 @@
   }
 }
 
-#if CONFIG_ANS
-void av1_cost_tokens_ans(int *costs, const aom_prob *tree_probs,
-                         const rans_lut token_cdf, int skip_eob) {
-  int c_tree = 0;  // Cost of the "tree" nodes EOB and ZERO.
-  int i;
-  costs[EOB_TOKEN] = av1_cost_bit(tree_probs[0], 0);
-  if (!skip_eob) c_tree = av1_cost_bit(tree_probs[0], 1);
-  for (i = ZERO_TOKEN; i <= CATEGORY6_TOKEN; ++i) {
-    const int p = token_cdf[i + 1] - token_cdf[i];
-    costs[i] = c_tree + av1_prob_cost10[p];
-  }
-}
-#endif  // CONFIG_ANS
-
 void av1_cost_tokens(int *costs, const aom_prob *probs, aom_tree tree) {
   cost(costs, tree, probs, 0, 0);
 }
diff --git a/av1/encoder/cost.h b/av1/encoder/cost.h
index 448b905..379200e 100644
--- a/av1/encoder/cost.h
+++ b/av1/encoder/cost.h
@@ -13,9 +13,6 @@
 
 #include "aom_dsp/prob.h"
 #include "aom/aom_integer.h"
-#if CONFIG_ANS
-#include "aom_dsp/ans.h"
-#endif  // CONFIG_ANS
 
 #ifdef __cplusplus
 extern "C" {
@@ -58,11 +55,6 @@
 void av1_cost_tokens(int *costs, const aom_prob *probs, aom_tree tree);
 void av1_cost_tokens_skip(int *costs, const aom_prob *probs, aom_tree tree);
 
-#if CONFIG_ANS
-void av1_cost_tokens_ans(int *costs, const aom_prob *tree_probs,
-                         const rans_lut token_cdf, int skip_eob);
-#endif
-
 #ifdef __cplusplus
 }  // extern "C"
 #endif
diff --git a/av1/encoder/encodeframe.c b/av1/encoder/encodeframe.c
index 2eecee4..ac1421e 100644
--- a/av1/encoder/encodeframe.c
+++ b/av1/encoder/encodeframe.c
@@ -4226,11 +4226,7 @@
                cpi->td.rd_counts.coef_counts);
       av1_copy(subframe_stats->eob_counts_buf[cm->coef_probs_update_idx],
                cm->counts.eob_branch);
-      av1_fill_token_costs(x->token_costs,
-#if CONFIG_ANS
-                           cm->fc->coef_cdfs,
-#endif  // CONFIG_ANS
-                           cm->fc->coef_probs);
+      av1_fill_token_costs(x->token_costs, cm->fc->coef_probs);
     }
   }
 #endif  // CONFIG_ENTROPY
diff --git a/av1/encoder/rd.c b/av1/encoder/rd.c
index 007f992..5212cbf 100644
--- a/av1/encoder/rd.c
+++ b/av1/encoder/rd.c
@@ -153,9 +153,6 @@
 }
 
 void av1_fill_token_costs(av1_coeff_cost *c,
-#if CONFIG_ANS
-                          coeff_cdf_model (*cdf)[PLANE_TYPES],
-#endif  // CONFIG_ANS
                           av1_coeff_probs_model (*p)[PLANE_TYPES]) {
   int i, j, k, l;
   TX_SIZE t;
@@ -164,19 +161,11 @@
       for (j = 0; j < REF_TYPES; ++j)
         for (k = 0; k < COEF_BANDS; ++k)
           for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l) {
-#if CONFIG_ANS
-            const aom_prob *const tree_probs = p[t][i][j][k][l];
-            av1_cost_tokens_ans((int *)c[t][i][j][k][0][l], tree_probs,
-                                cdf[t][i][j][k][l], 0);
-            av1_cost_tokens_ans((int *)c[t][i][j][k][1][l], tree_probs,
-                                cdf[t][i][j][k][l], 1);
-#else
             aom_prob probs[ENTROPY_NODES];
             av1_model_to_full_probs(p[t][i][j][k][l], probs);
             av1_cost_tokens((int *)c[t][i][j][k][0][l], probs, av1_coef_tree);
             av1_cost_tokens_skip((int *)c[t][i][j][k][1][l], probs,
                                  av1_coef_tree);
-#endif  // CONFIG_ANS
             assert(c[t][i][j][k][0][l][EOB_TOKEN] ==
                    c[t][i][j][k][1][l][EOB_TOKEN]);
           }
@@ -387,11 +376,7 @@
 #endif
   }
   if (cpi->oxcf.pass != 1) {
-    av1_fill_token_costs(x->token_costs,
-#if CONFIG_ANS
-                         cm->fc->coef_cdfs,
-#endif  // CONFIG_ANS
-                         cm->fc->coef_probs);
+    av1_fill_token_costs(x->token_costs, cm->fc->coef_probs);
 
     if (cpi->sf.partition_search_type != VAR_BASED_PARTITION ||
         cm->frame_type == KEY_FRAME) {
diff --git a/av1/encoder/rd.h b/av1/encoder/rd.h
index 933733b..3ca4768 100644
--- a/av1/encoder/rd.h
+++ b/av1/encoder/rd.h
@@ -431,9 +431,6 @@
                                int best_mode_index);
 
 void av1_fill_token_costs(av1_coeff_cost *c,
-#if CONFIG_ANS
-                          coeff_cdf_model (*cdf)[PLANE_TYPES],
-#endif  // CONFIG_ANS
                           av1_coeff_probs_model (*p)[PLANE_TYPES]);
 
 static INLINE int rd_less_than_thresh(int64_t best_rd, int thresh,