vp9/common/vp9_entropymode.c - aom - Git at Google

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */


 #include "vp9/common/vp9_onyxc_int.h"
 #include "vp9/common/vp9_seg_common.h"
 #include "vp9/common/vp9_alloccommon.h"
 #include "vpx_mem/vpx_mem.h"

 static const vp9_prob default_kf_uv_probs[VP9_INTRA_MODES]
                                          [VP9_INTRA_MODES - 1] = {
   { 144,  11,  54, 157, 195, 130,  46,  58, 108 } /* y = dc */,
   { 118,  15, 123, 148, 131, 101,  44,  93, 131 } /* y = v */,
   { 113,  12,  23, 188, 226, 142,  26,  32, 125 } /* y = h */,
   { 120,  11,  50, 123, 163, 135,  64,  77, 103 } /* y = d45 */,
   { 113,   9,  36, 155, 111, 157,  32,  44, 161 } /* y = d135 */,
   { 116,   9,  55, 176,  76,  96,  37,  61, 149 } /* y = d117 */,
   { 115,   9,  28, 141, 161, 167,  21,  25, 193 } /* y = d153 */,
   { 120,  12,  32, 145, 195, 142,  32,  38,  86 } /* y = d27 */,
   { 116,  12,  64, 120, 140, 125,  49, 115, 121 } /* y = d63 */,
   { 102,  19,  66, 162, 182, 122,  35,  59, 128 } /* y = tm */
 };

 static const vp9_prob default_if_y_probs[BLOCK_SIZE_GROUPS]
                                         [VP9_INTRA_MODES - 1] = {
   {  65,  32,  18, 144, 162, 194,  41,  51,  98 } /* block_size < 8x8 */,
   { 132,  68,  18, 165, 217, 196,  45,  40,  78 } /* block_size < 16x16 */,
   { 173,  80,  19, 176, 240, 193,  64,  35,  46 } /* block_size < 32x32 */,
   { 221, 135,  38, 194, 248, 121,  96,  85,  29 } /* block_size >= 32x32 */
 };

 static const vp9_prob default_if_uv_probs[VP9_INTRA_MODES]
                                          [VP9_INTRA_MODES - 1] = {
   { 120,   7,  76, 176, 208, 126,  28,  54, 103 } /* y = dc */,
   {  48,  12, 154, 155, 139,  90,  34, 117, 119 } /* y = v */,
   {  67,   6,  25, 204, 243, 158,  13,  21,  96 } /* y = h */,
   {  97,   5,  44, 131, 176, 139,  48,  68,  97 } /* y = d45 */,
   {  83,   5,  42, 156, 111, 152,  26,  49, 152 } /* y = d135 */,
   {  80,   5,  58, 178,  74,  83,  33,  62, 145 } /* y = d117 */,
   {  86,   5,  32, 154, 192, 168,  14,  22, 163 } /* y = d153 */,
   {  85,   5,  32, 156, 216, 148,  19,  29,  73 } /* y = d27 */,
   {  77,   7,  64, 116, 132, 122,  37, 126, 120 } /* y = d63 */,
   { 101,  21, 107, 181, 192, 103,  19,  67, 125 } /* y = tm */
 };

 const vp9_prob vp9_partition_probs[NUM_FRAME_TYPES][NUM_PARTITION_CONTEXTS]
                                   [PARTITION_TYPES - 1] = {
   { /* frame_type = keyframe */
     /* 8x8 -> 4x4 */
     { 158,  97,  94 } /* a/l both not split */,
     {  93,  24,  99 } /* a split, l not split */,
     {  85, 119,  44 } /* l split, a not split */,
     {  62,  59,  67 } /* a/l both split */,
     /* 16x16 -> 8x8 */
     { 149,  53,  53 } /* a/l both not split */,
     {  94,  20,  48 } /* a split, l not split */,
     {  83,  53,  24 } /* l split, a not split */,
     {  52,  18,  18 } /* a/l both split */,
     /* 32x32 -> 16x16 */
     { 150,  40,  39 } /* a/l both not split */,
     {  78,  12,  26 } /* a split, l not split */,
     {  67,  33,  11 } /* l split, a not split */,
     {  24,   7,   5 } /* a/l both split */,
     /* 64x64 -> 32x32 */
     { 174,  35,  49 } /* a/l both not split */,
     {  68,  11,  27 } /* a split, l not split */,
     {  57,  15,   9 } /* l split, a not split */,
     {  12,   3,   3 } /* a/l both split */
   }, { /* frame_type = interframe */
     /* 8x8 -> 4x4 */
     { 199, 122, 141 } /* a/l both not split */,
     { 147,  63, 159 } /* a split, l not split */,
     { 148, 133, 118 } /* l split, a not split */,
     { 121, 104, 114 } /* a/l both split */,
     /* 16x16 -> 8x8 */
     { 174,  73,  87 } /* a/l both not split */,
     {  92,  41,  83 } /* a split, l not split */,
     {  82,  99,  50 } /* l split, a not split */,
     {  53,  39,  39 } /* a/l both split */,
     /* 32x32 -> 16x16 */
     { 177,  58,  59 } /* a/l both not split */,
     {  68,  26,  63 } /* a split, l not split */,
     {  52,  79,  25 } /* l split, a not split */,
     {  17,  14,  12 } /* a/l both split */,
     /* 64x64 -> 32x32 */
     { 222,  34,  30 } /* a/l both not split */,
     {  72,  16,  44 } /* a split, l not split */,
     {  58,  32,  12 } /* l split, a not split */,
     {  10,   7,   6 } /* a/l both split */
   }
 };

 static const vp9_prob default_inter_mode_probs[INTER_MODE_CONTEXTS]
                                               [VP9_INTER_MODES - 1] = {
   {2,       173,   34},  // 0 = both zero mv
   {7,       145,   85},  // 1 = one zero mv + one a predicted mv
   {7,       166,   63},  // 2 = two predicted mvs
   {7,       94,    66},  // 3 = one predicted/zero and one new mv
   {8,       64,    46},  // 4 = two new mvs
   {17,      81,    31},  // 5 = one intra neighbour + x
   {25,      29,    30},  // 6 = two intra neighbours
 };

 /* Array indices are identical to previously-existing INTRAMODECONTEXTNODES. */
 const vp9_tree_index vp9_intra_mode_tree[VP9_INTRA_MODES * 2 - 2] = {
   -DC_PRED, 2,                      /* 0 = DC_NODE */
   -TM_PRED, 4,                      /* 1 = TM_NODE */
   -V_PRED, 6,                       /* 2 = V_NODE */
   8, 12,                            /* 3 = COM_NODE */
   -H_PRED, 10,                      /* 4 = H_NODE */
   -D135_PRED, -D117_PRED,           /* 5 = D135_NODE */
   -D45_PRED, 14,                    /* 6 = D45_NODE */
   -D63_PRED, 16,                    /* 7 = D63_NODE */
   -D153_PRED, -D27_PRED             /* 8 = D153_NODE */
 };

 const vp9_tree_index vp9_sb_mv_ref_tree[6] = {
   -ZEROMV, 2,
   -NEARESTMV, 4,
   -NEARMV, -NEWMV
 };

 const vp9_tree_index vp9_partition_tree[6] = {
   -PARTITION_NONE, 2,
   -PARTITION_HORZ, 4,
   -PARTITION_VERT, -PARTITION_SPLIT
 };

 struct vp9_token vp9_intra_mode_encodings[VP9_INTRA_MODES];

 struct vp9_token vp9_sb_mv_ref_encoding_array[VP9_INTER_MODES];

 struct vp9_token vp9_partition_encodings[PARTITION_TYPES];

 static const vp9_prob default_intra_inter_p[INTRA_INTER_CONTEXTS] = {
   9, 102, 187, 225
 };

 static const vp9_prob default_comp_inter_p[COMP_INTER_CONTEXTS] = {
   239, 183, 119,  96,  41
 };

 static const vp9_prob default_comp_ref_p[REF_CONTEXTS] = {
   50, 126, 123, 221, 226
 };

 static const vp9_prob default_single_ref_p[REF_CONTEXTS][2] = {
   {  33,  16 },
   {  77,  74 },
   { 142, 142 },
   { 172, 170 },
   { 238, 247 }
 };

 const vp9_prob vp9_default_tx_probs_32x32p[TX_SIZE_CONTEXTS]
                                           [TX_SIZE_MAX_SB - 1] = {
   { 3, 136, 37, },
   { 5, 52, 13, },
 };
 const vp9_prob vp9_default_tx_probs_16x16p[TX_SIZE_CONTEXTS]
                                           [TX_SIZE_MAX_SB - 2] = {
   { 20, 152, },
   { 15, 101, },
 };
 const vp9_prob vp9_default_tx_probs_8x8p[TX_SIZE_CONTEXTS]
                                         [TX_SIZE_MAX_SB - 3] = {
   { 100, },
   { 66, },
 };

 void tx_counts_to_branch_counts_32x32(unsigned int *tx_count_32x32p,
                                       unsigned int (*ct_32x32p)[2]) {
   ct_32x32p[0][0] = tx_count_32x32p[TX_4X4];
   ct_32x32p[0][1] = tx_count_32x32p[TX_8X8] +
                     tx_count_32x32p[TX_16X16] +
                     tx_count_32x32p[TX_32X32];
   ct_32x32p[1][0] = tx_count_32x32p[TX_8X8];
   ct_32x32p[1][1] = tx_count_32x32p[TX_16X16] +
                     tx_count_32x32p[TX_32X32];
   ct_32x32p[2][0] = tx_count_32x32p[TX_16X16];
   ct_32x32p[2][1] = tx_count_32x32p[TX_32X32];
 }

 void tx_counts_to_branch_counts_16x16(unsigned int *tx_count_16x16p,
                                       unsigned int (*ct_16x16p)[2]) {
   ct_16x16p[0][0] = tx_count_16x16p[TX_4X4];
   ct_16x16p[0][1] = tx_count_16x16p[TX_8X8] + tx_count_16x16p[TX_16X16];
   ct_16x16p[1][0] = tx_count_16x16p[TX_8X8];
   ct_16x16p[1][1] = tx_count_16x16p[TX_16X16];
 }

 void tx_counts_to_branch_counts_8x8(unsigned int *tx_count_8x8p,
                                     unsigned int (*ct_8x8p)[2]) {
   ct_8x8p[0][0] = tx_count_8x8p[TX_4X4];
   ct_8x8p[0][1] = tx_count_8x8p[TX_8X8];
 }

 const vp9_prob vp9_default_mbskip_probs[MBSKIP_CONTEXTS] = {
   192, 128, 64
 };

 void vp9_init_mbmode_probs(VP9_COMMON *cm) {
   vp9_copy(cm->fc.uv_mode_prob, default_if_uv_probs);
   vp9_copy(cm->kf_uv_mode_prob, default_kf_uv_probs);
   vp9_copy(cm->fc.y_mode_prob, default_if_y_probs);
   vp9_copy(cm->fc.switchable_interp_prob, vp9_switchable_interp_prob);
   vp9_copy(cm->fc.partition_prob, vp9_partition_probs);
   vp9_copy(cm->fc.intra_inter_prob, default_intra_inter_p);
   vp9_copy(cm->fc.comp_inter_prob, default_comp_inter_p);
   vp9_copy(cm->fc.comp_ref_prob, default_comp_ref_p);
   vp9_copy(cm->fc.single_ref_prob, default_single_ref_p);
   vp9_copy(cm->fc.tx_probs_32x32p, vp9_default_tx_probs_32x32p);
   vp9_copy(cm->fc.tx_probs_16x16p, vp9_default_tx_probs_16x16p);
   vp9_copy(cm->fc.tx_probs_8x8p, vp9_default_tx_probs_8x8p);
   vp9_copy(cm->fc.mbskip_probs, vp9_default_mbskip_probs);
 }

 const vp9_tree_index vp9_switchable_interp_tree[VP9_SWITCHABLE_FILTERS*2-2] = {
   -0, 2,
   -1, -2
 };
 struct vp9_token vp9_switchable_interp_encodings[VP9_SWITCHABLE_FILTERS];
 const INTERPOLATIONFILTERTYPE vp9_switchable_interp[VP9_SWITCHABLE_FILTERS] = {
   EIGHTTAP, EIGHTTAP_SMOOTH, EIGHTTAP_SHARP};
 const int vp9_switchable_interp_map[SWITCHABLE+1] = {1, 0, 2, -1, -1};
 const vp9_prob vp9_switchable_interp_prob [VP9_SWITCHABLE_FILTERS+1]
                                           [VP9_SWITCHABLE_FILTERS-1] = {
   { 235, 162, },
   { 36, 255, },
   { 34, 3, },
   { 149, 144, },
 };

 // Indicates if the filter is interpolating or non-interpolating
 const int vp9_is_interpolating_filter[SWITCHABLE + 1] = {1, 1, 1, 1, -1};

 void vp9_entropy_mode_init() {
   vp9_tokens_from_tree(vp9_intra_mode_encodings, vp9_intra_mode_tree);
   vp9_tokens_from_tree(vp9_switchable_interp_encodings,
                        vp9_switchable_interp_tree);
   vp9_tokens_from_tree(vp9_partition_encodings, vp9_partition_tree);
   vp9_tokens_from_tree_offset(vp9_sb_mv_ref_encoding_array,
                               vp9_sb_mv_ref_tree, NEARESTMV);
 }

 void vp9_init_mode_contexts(VP9_COMMON *pc) {
   vpx_memset(pc->fc.inter_mode_counts, 0, sizeof(pc->fc.inter_mode_counts));
   vpx_memcpy(pc->fc.inter_mode_probs, default_inter_mode_probs,
              sizeof(default_inter_mode_probs));
 }

 void vp9_accum_mv_refs(VP9_COMMON *pc,
                        MB_PREDICTION_MODE m,
                        const int context) {
   unsigned int (*inter_mode_counts)[VP9_INTER_MODES - 1][2] =
       pc->fc.inter_mode_counts;

   if (m == ZEROMV) {
     ++inter_mode_counts[context][0][0];
   } else {
     ++inter_mode_counts[context][0][1];
     if (m == NEARESTMV) {
       ++inter_mode_counts[context][1][0];
     } else {
       ++inter_mode_counts[context][1][1];
       if (m == NEARMV) {
         ++inter_mode_counts[context][2][0];
       } else {
         ++inter_mode_counts[context][2][1];
       }
     }
   }
 }

 #define MVREF_COUNT_SAT 20
 #define MVREF_MAX_UPDATE_FACTOR 128
 void vp9_adapt_mode_context(VP9_COMMON *pc) {
   int i, j;
   unsigned int (*inter_mode_counts)[VP9_INTER_MODES - 1][2] =
       pc->fc.inter_mode_counts;
   vp9_prob (*mode_context)[VP9_INTER_MODES - 1] = pc->fc.inter_mode_probs;

   for (j = 0; j < INTER_MODE_CONTEXTS; j++) {
     for (i = 0; i < VP9_INTER_MODES - 1; i++) {
       int count = inter_mode_counts[j][i][0] + inter_mode_counts[j][i][1];
       int factor;
       count = count > MVREF_COUNT_SAT ? MVREF_COUNT_SAT : count;
       factor = (MVREF_MAX_UPDATE_FACTOR * count / MVREF_COUNT_SAT);
       mode_context[j][i] = weighted_prob(
           pc->fc.pre_inter_mode_probs[j][i],
           get_binary_prob(inter_mode_counts[j][i][0],
                           inter_mode_counts[j][i][1]),
           factor);
     }
   }
 }

 #define MODE_COUNT_SAT 20
 #define MODE_MAX_UPDATE_FACTOR 128

 static int update_mode_ct(vp9_prob pre_prob, vp9_prob prob,
                           unsigned int ct[2]) {
   const int count = MIN(ct[0] + ct[1], MODE_COUNT_SAT);
   const int factor = MODE_MAX_UPDATE_FACTOR * count / MODE_COUNT_SAT;
   return weighted_prob(pre_prob, prob, factor);
 }

 static int update_mode_ct2(vp9_prob pre_prob, unsigned int ct[2]) {
   return update_mode_ct(pre_prob, get_binary_prob(ct[0], ct[1]), ct);
 }

 static vp9_prob update_tx_ct(vp9_prob prob, unsigned int ct[2]) {
   const int count = MIN(ct[0] + ct[1], MODE_COUNT_SAT);
   const int factor = count * MODE_MAX_UPDATE_FACTOR / MODE_COUNT_SAT;
   return weighted_prob(prob, get_binary_prob(ct[0], ct[1]), factor);
 }

 static void update_mode_probs(int n_modes,
                               const vp9_tree_index *tree, unsigned int *cnt,
                               vp9_prob *pre_probs, vp9_prob *dst_probs,
                               unsigned int tok0_offset) {
 #define MAX_PROBS 32
   vp9_prob probs[MAX_PROBS];
   unsigned int branch_ct[MAX_PROBS][2];
   int t;

   assert(n_modes - 1 < MAX_PROBS);
   vp9_tree_probs_from_distribution(tree, probs, branch_ct, cnt, tok0_offset);
   for (t = 0; t < n_modes - 1; ++t)
     dst_probs[t] = update_mode_ct(pre_probs[t], probs[t], branch_ct[t]);
 }

 // #define MODE_COUNT_TESTING
 void vp9_adapt_mode_probs(VP9_COMMON *cm) {
   int i, j;
   FRAME_CONTEXT *fc = &cm->fc;
 #ifdef MODE_COUNT_TESTING
   int t;

   printf("static const unsigned int\nymode_counts"
          "[VP9_INTRA_MODES] = {\n");
   for (t = 0; t < VP9_INTRA_MODES; ++t)
     printf("%d, ", fc->ymode_counts[t]);
   printf("};\n");
   printf("static const unsigned int\nuv_mode_counts"
          "[VP9_INTRA_MODES] [VP9_INTRA_MODES] = {\n");
   for (i = 0; i < VP9_INTRA_MODES; ++i) {
     printf("  {");
     for (t = 0; t < VP9_INTRA_MODES; ++t)
       printf("%d, ", fc->uv_mode_counts[i][t]);
     printf("},\n");
   }
   printf("};\n");
   printf("static const unsigned int\nbmode_counts"
          "[VP9_NKF_BINTRAMODES] = {\n");
   for (t = 0; t < VP9_NKF_BINTRAMODES; ++t)
     printf("%d, ", fc->bmode_counts[t]);
   printf("};\n");
   printf("static const unsigned int\ni8x8_mode_counts"
          "[VP9_I8X8_MODES] = {\n");
   for (t = 0; t < VP9_I8X8_MODES; ++t)
     printf("%d, ", fc->i8x8_mode_counts[t]);
   printf("};\n");
   printf("static const unsigned int\nmbsplit_counts"
          "[VP9_NUMMBSPLITS] = {\n");
   for (t = 0; t < VP9_NUMMBSPLITS; ++t)
     printf("%d, ", fc->mbsplit_counts[t]);
   printf("};\n");
 #endif

   for (i = 0; i < INTRA_INTER_CONTEXTS; i++)
     fc->intra_inter_prob[i] = update_mode_ct2(fc->pre_intra_inter_prob[i],
                                               fc->intra_inter_count[i]);
   for (i = 0; i < COMP_INTER_CONTEXTS; i++)
     fc->comp_inter_prob[i] = update_mode_ct2(fc->pre_comp_inter_prob[i],
                                              fc->comp_inter_count[i]);
   for (i = 0; i < REF_CONTEXTS; i++)
     fc->comp_ref_prob[i] = update_mode_ct2(fc->pre_comp_ref_prob[i],
                                            fc->comp_ref_count[i]);
   for (i = 0; i < REF_CONTEXTS; i++)
     for (j = 0; j < 2; j++)
       fc->single_ref_prob[i][j] = update_mode_ct2(fc->pre_single_ref_prob[i][j],
                                                   fc->single_ref_count[i][j]);

   for (i = 0; i < BLOCK_SIZE_GROUPS; i++)
     update_mode_probs(VP9_INTRA_MODES, vp9_intra_mode_tree,
                       fc->y_mode_counts[i], fc->pre_y_mode_prob[i],
                       fc->y_mode_prob[i], 0);

   for (i = 0; i < VP9_INTRA_MODES; ++i)
     update_mode_probs(VP9_INTRA_MODES, vp9_intra_mode_tree,
                       fc->uv_mode_counts[i], fc->pre_uv_mode_prob[i],
                       fc->uv_mode_prob[i], 0);

   for (i = 0; i < NUM_PARTITION_CONTEXTS; i++)
     update_mode_probs(PARTITION_TYPES, vp9_partition_tree,
                       fc->partition_counts[i], fc->pre_partition_prob[i],
                       fc->partition_prob[INTER_FRAME][i], 0);

   if (cm->mcomp_filter_type == SWITCHABLE) {
     for (i = 0; i <= VP9_SWITCHABLE_FILTERS; i++)
       update_mode_probs(VP9_SWITCHABLE_FILTERS, vp9_switchable_interp_tree,
                         fc->switchable_interp_count[i],
                         fc->pre_switchable_interp_prob[i],
                         fc->switchable_interp_prob[i], 0);
   }

   if (cm->txfm_mode == TX_MODE_SELECT) {
     int j;
     unsigned int branch_ct_8x8p[TX_SIZE_MAX_SB - 3][2];
     unsigned int branch_ct_16x16p[TX_SIZE_MAX_SB - 2][2];
     unsigned int branch_ct_32x32p[TX_SIZE_MAX_SB - 1][2];

     for (i = 0; i < TX_SIZE_CONTEXTS; ++i) {
       tx_counts_to_branch_counts_8x8(fc->tx_count_8x8p[i], branch_ct_8x8p);
       for (j = 0; j < TX_SIZE_MAX_SB - 3; ++j)
         fc->tx_probs_8x8p[i][j] = update_tx_ct(fc->pre_tx_probs_8x8p[i][j],
                                                branch_ct_8x8p[j]);

       tx_counts_to_branch_counts_16x16(fc->tx_count_16x16p[i],
                                        branch_ct_16x16p);
       for (j = 0; j < TX_SIZE_MAX_SB - 2; ++j)
         fc->tx_probs_16x16p[i][j] = update_tx_ct(fc->pre_tx_probs_16x16p[i][j],
                                                  branch_ct_16x16p[j]);

       tx_counts_to_branch_counts_32x32(fc->tx_count_32x32p[i],
                                        branch_ct_32x32p);
       for (j = 0; j < TX_SIZE_MAX_SB - 1; ++j)
         fc->tx_probs_32x32p[i][j] = update_tx_ct(fc->pre_tx_probs_32x32p[i][j],
                                                  branch_ct_32x32p[j]);
     }
   }

   for (i = 0; i < MBSKIP_CONTEXTS; ++i)
     fc->mbskip_probs[i] = update_mode_ct2(fc->pre_mbskip_probs[i],
                                           fc->mbskip_count[i]);
 }

 static void set_default_lf_deltas(MACROBLOCKD *xd) {
   xd->mode_ref_lf_delta_enabled = 1;
   xd->mode_ref_lf_delta_update = 1;

   xd->ref_lf_deltas[INTRA_FRAME] = 1;
   xd->ref_lf_deltas[LAST_FRAME] = 0;
   xd->ref_lf_deltas[GOLDEN_FRAME] = -1;
   xd->ref_lf_deltas[ALTREF_FRAME] = -1;

   xd->mode_lf_deltas[0] = 0;              // Zero
   xd->mode_lf_deltas[1] = 0;               // New mv
 }

 void vp9_setup_past_independence(VP9_COMMON *cm, MACROBLOCKD *xd) {
   // Reset the segment feature data to the default stats:
   // Features disabled, 0, with delta coding (Default state).
   int i;
   vp9_clearall_segfeatures(&xd->seg);
   xd->seg.abs_delta = SEGMENT_DELTADATA;
   if (cm->last_frame_seg_map)
     vpx_memset(cm->last_frame_seg_map, 0, (cm->mi_rows * cm->mi_cols));

   // Reset the mode ref deltas for loop filter
   vpx_memset(xd->last_ref_lf_deltas, 0, sizeof(xd->last_ref_lf_deltas));
   vpx_memset(xd->last_mode_lf_deltas, 0, sizeof(xd->last_mode_lf_deltas));
   set_default_lf_deltas(xd);

   vp9_default_coef_probs(cm);
   vp9_init_mbmode_probs(cm);
   vpx_memcpy(cm->kf_y_mode_prob, vp9_kf_default_bmode_probs,
              sizeof(vp9_kf_default_bmode_probs));
   vp9_init_mv_probs(cm);

   // To force update of the sharpness
   cm->last_sharpness_level = -1;

   vp9_init_mode_contexts(cm);

   if ((cm->frame_type == KEY_FRAME) ||
       cm->error_resilient_mode || (cm->reset_frame_context == 3)) {
     // Reset all frame contexts.
     for (i = 0; i < NUM_FRAME_CONTEXTS; ++i)
       vpx_memcpy(&cm->frame_contexts[i], &cm->fc, sizeof(cm->fc));
   } else if (cm->reset_frame_context == 2) {
     // Reset only the frame context specified in the frame header.
     vpx_memcpy(&cm->frame_contexts[cm->frame_context_idx], &cm->fc,
                sizeof(cm->fc));
   }

   vpx_memset(cm->prev_mip, 0,
              cm->mode_info_stride * (cm->mi_rows + 1) * sizeof(MODE_INFO));
   vpx_memset(cm->mip, 0,
              cm->mode_info_stride * (cm->mi_rows + 1) * sizeof(MODE_INFO));

   vp9_update_mode_info_border(cm, cm->mip);
   vp9_update_mode_info_in_image(cm, cm->mi);

   vp9_update_mode_info_border(cm, cm->prev_mip);
   vp9_update_mode_info_in_image(cm, cm->prev_mi);

   vpx_memset(cm->ref_frame_sign_bias, 0, sizeof(cm->ref_frame_sign_bias));

   cm->frame_context_idx = 0;
 }
	/*
	* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
	*
	* Use of this source code is governed by a BSD-style license
	* that can be found in the LICENSE file in the root of the source
	* tree. An additional intellectual property rights grant can be found
	* in the file PATENTS. All contributing project authors may
	* be found in the AUTHORS file in the root of the source tree.
	*/


	#include "vp9/common/vp9_onyxc_int.h"
	#include "vp9/common/vp9_seg_common.h"
	#include "vp9/common/vp9_alloccommon.h"
	#include "vpx_mem/vpx_mem.h"

	static const vp9_prob default_kf_uv_probs[VP9_INTRA_MODES]
	[VP9_INTRA_MODES - 1] = {
	{ 144, 11, 54, 157, 195, 130, 46, 58, 108 } /* y = dc */,
	{ 118, 15, 123, 148, 131, 101, 44, 93, 131 } /* y = v */,
	{ 113, 12, 23, 188, 226, 142, 26, 32, 125 } /* y = h */,
	{ 120, 11, 50, 123, 163, 135, 64, 77, 103 } /* y = d45 */,
	{ 113, 9, 36, 155, 111, 157, 32, 44, 161 } /* y = d135 */,
	{ 116, 9, 55, 176, 76, 96, 37, 61, 149 } /* y = d117 */,
	{ 115, 9, 28, 141, 161, 167, 21, 25, 193 } /* y = d153 */,
	{ 120, 12, 32, 145, 195, 142, 32, 38, 86 } /* y = d27 */,
	{ 116, 12, 64, 120, 140, 125, 49, 115, 121 } /* y = d63 */,
	{ 102, 19, 66, 162, 182, 122, 35, 59, 128 } /* y = tm */
	};

	static const vp9_prob default_if_y_probs[BLOCK_SIZE_GROUPS]
	[VP9_INTRA_MODES - 1] = {
	{ 65, 32, 18, 144, 162, 194, 41, 51, 98 } /* block_size < 8x8 */,
	{ 132, 68, 18, 165, 217, 196, 45, 40, 78 } /* block_size < 16x16 */,
	{ 173, 80, 19, 176, 240, 193, 64, 35, 46 } /* block_size < 32x32 */,
	{ 221, 135, 38, 194, 248, 121, 96, 85, 29 } /* block_size >= 32x32 */
	};

	static const vp9_prob default_if_uv_probs[VP9_INTRA_MODES]
	[VP9_INTRA_MODES - 1] = {
	{ 120, 7, 76, 176, 208, 126, 28, 54, 103 } /* y = dc */,
	{ 48, 12, 154, 155, 139, 90, 34, 117, 119 } /* y = v */,
	{ 67, 6, 25, 204, 243, 158, 13, 21, 96 } /* y = h */,
	{ 97, 5, 44, 131, 176, 139, 48, 68, 97 } /* y = d45 */,
	{ 83, 5, 42, 156, 111, 152, 26, 49, 152 } /* y = d135 */,
	{ 80, 5, 58, 178, 74, 83, 33, 62, 145 } /* y = d117 */,
	{ 86, 5, 32, 154, 192, 168, 14, 22, 163 } /* y = d153 */,
	{ 85, 5, 32, 156, 216, 148, 19, 29, 73 } /* y = d27 */,
	{ 77, 7, 64, 116, 132, 122, 37, 126, 120 } /* y = d63 */,
	{ 101, 21, 107, 181, 192, 103, 19, 67, 125 } /* y = tm */
	};

	const vp9_prob vp9_partition_probs[NUM_FRAME_TYPES][NUM_PARTITION_CONTEXTS]
	[PARTITION_TYPES - 1] = {
	{ /* frame_type = keyframe */
	/* 8x8 -> 4x4 */
	{ 158, 97, 94 } /* a/l both not split */,
	{ 93, 24, 99 } /* a split, l not split */,
	{ 85, 119, 44 } /* l split, a not split */,
	{ 62, 59, 67 } /* a/l both split */,
	/* 16x16 -> 8x8 */
	{ 149, 53, 53 } /* a/l both not split */,
	{ 94, 20, 48 } /* a split, l not split */,
	{ 83, 53, 24 } /* l split, a not split */,
	{ 52, 18, 18 } /* a/l both split */,
	/* 32x32 -> 16x16 */
	{ 150, 40, 39 } /* a/l both not split */,
	{ 78, 12, 26 } /* a split, l not split */,
	{ 67, 33, 11 } /* l split, a not split */,
	{ 24, 7, 5 } /* a/l both split */,
	/* 64x64 -> 32x32 */
	{ 174, 35, 49 } /* a/l both not split */,
	{ 68, 11, 27 } /* a split, l not split */,
	{ 57, 15, 9 } /* l split, a not split */,
	{ 12, 3, 3 } /* a/l both split */
	}, { /* frame_type = interframe */
	/* 8x8 -> 4x4 */
	{ 199, 122, 141 } /* a/l both not split */,
	{ 147, 63, 159 } /* a split, l not split */,
	{ 148, 133, 118 } /* l split, a not split */,
	{ 121, 104, 114 } /* a/l both split */,
	/* 16x16 -> 8x8 */
	{ 174, 73, 87 } /* a/l both not split */,
	{ 92, 41, 83 } /* a split, l not split */,
	{ 82, 99, 50 } /* l split, a not split */,
	{ 53, 39, 39 } /* a/l both split */,
	/* 32x32 -> 16x16 */
	{ 177, 58, 59 } /* a/l both not split */,
	{ 68, 26, 63 } /* a split, l not split */,
	{ 52, 79, 25 } /* l split, a not split */,
	{ 17, 14, 12 } /* a/l both split */,
	/* 64x64 -> 32x32 */
	{ 222, 34, 30 } /* a/l both not split */,
	{ 72, 16, 44 } /* a split, l not split */,
	{ 58, 32, 12 } /* l split, a not split */,
	{ 10, 7, 6 } /* a/l both split */
	}
	};

	static const vp9_prob default_inter_mode_probs[INTER_MODE_CONTEXTS]
	[VP9_INTER_MODES - 1] = {
	{2, 173, 34}, // 0 = both zero mv
	{7, 145, 85}, // 1 = one zero mv + one a predicted mv
	{7, 166, 63}, // 2 = two predicted mvs
	{7, 94, 66}, // 3 = one predicted/zero and one new mv
	{8, 64, 46}, // 4 = two new mvs
	{17, 81, 31}, // 5 = one intra neighbour + x
	{25, 29, 30}, // 6 = two intra neighbours
	};

	/* Array indices are identical to previously-existing INTRAMODECONTEXTNODES. */
	const vp9_tree_index vp9_intra_mode_tree[VP9_INTRA_MODES * 2 - 2] = {
	-DC_PRED, 2, /* 0 = DC_NODE */
	-TM_PRED, 4, /* 1 = TM_NODE */
	-V_PRED, 6, /* 2 = V_NODE */
	8, 12, /* 3 = COM_NODE */
	-H_PRED, 10, /* 4 = H_NODE */
	-D135_PRED, -D117_PRED, /* 5 = D135_NODE */
	-D45_PRED, 14, /* 6 = D45_NODE */
	-D63_PRED, 16, /* 7 = D63_NODE */
	-D153_PRED, -D27_PRED /* 8 = D153_NODE */
	};

	const vp9_tree_index vp9_sb_mv_ref_tree[6] = {
	-ZEROMV, 2,
	-NEARESTMV, 4,
	-NEARMV, -NEWMV
	};

	const vp9_tree_index vp9_partition_tree[6] = {
	-PARTITION_NONE, 2,
	-PARTITION_HORZ, 4,
	-PARTITION_VERT, -PARTITION_SPLIT
	};

	struct vp9_token vp9_intra_mode_encodings[VP9_INTRA_MODES];

	struct vp9_token vp9_sb_mv_ref_encoding_array[VP9_INTER_MODES];

	struct vp9_token vp9_partition_encodings[PARTITION_TYPES];

	static const vp9_prob default_intra_inter_p[INTRA_INTER_CONTEXTS] = {
	9, 102, 187, 225
	};

	static const vp9_prob default_comp_inter_p[COMP_INTER_CONTEXTS] = {
	239, 183, 119, 96, 41
	};

	static const vp9_prob default_comp_ref_p[REF_CONTEXTS] = {
	50, 126, 123, 221, 226
	};

	static const vp9_prob default_single_ref_p[REF_CONTEXTS][2] = {
	{ 33, 16 },
	{ 77, 74 },
	{ 142, 142 },
	{ 172, 170 },
	{ 238, 247 }
	};

	const vp9_prob vp9_default_tx_probs_32x32p[TX_SIZE_CONTEXTS]
	[TX_SIZE_MAX_SB - 1] = {
	{ 3, 136, 37, },
	{ 5, 52, 13, },
	};
	const vp9_prob vp9_default_tx_probs_16x16p[TX_SIZE_CONTEXTS]
	[TX_SIZE_MAX_SB - 2] = {
	{ 20, 152, },
	{ 15, 101, },
	};
	const vp9_prob vp9_default_tx_probs_8x8p[TX_SIZE_CONTEXTS]
	[TX_SIZE_MAX_SB - 3] = {
	{ 100, },
	{ 66, },
	};

	void tx_counts_to_branch_counts_32x32(unsigned int *tx_count_32x32p,
	unsigned int (*ct_32x32p)[2]) {
	ct_32x32p[0][0] = tx_count_32x32p[TX_4X4];
	ct_32x32p[0][1] = tx_count_32x32p[TX_8X8] +
	tx_count_32x32p[TX_16X16] +
	tx_count_32x32p[TX_32X32];
	ct_32x32p[1][0] = tx_count_32x32p[TX_8X8];
	ct_32x32p[1][1] = tx_count_32x32p[TX_16X16] +
	tx_count_32x32p[TX_32X32];
	ct_32x32p[2][0] = tx_count_32x32p[TX_16X16];
	ct_32x32p[2][1] = tx_count_32x32p[TX_32X32];
	}

	void tx_counts_to_branch_counts_16x16(unsigned int *tx_count_16x16p,
	unsigned int (*ct_16x16p)[2]) {
	ct_16x16p[0][0] = tx_count_16x16p[TX_4X4];
	ct_16x16p[0][1] = tx_count_16x16p[TX_8X8] + tx_count_16x16p[TX_16X16];
	ct_16x16p[1][0] = tx_count_16x16p[TX_8X8];
	ct_16x16p[1][1] = tx_count_16x16p[TX_16X16];
	}

	void tx_counts_to_branch_counts_8x8(unsigned int *tx_count_8x8p,
	unsigned int (*ct_8x8p)[2]) {
	ct_8x8p[0][0] = tx_count_8x8p[TX_4X4];
	ct_8x8p[0][1] = tx_count_8x8p[TX_8X8];
	}

	const vp9_prob vp9_default_mbskip_probs[MBSKIP_CONTEXTS] = {
	192, 128, 64
	};

	void vp9_init_mbmode_probs(VP9_COMMON *cm) {
	vp9_copy(cm->fc.uv_mode_prob, default_if_uv_probs);
	vp9_copy(cm->kf_uv_mode_prob, default_kf_uv_probs);
	vp9_copy(cm->fc.y_mode_prob, default_if_y_probs);
	vp9_copy(cm->fc.switchable_interp_prob, vp9_switchable_interp_prob);
	vp9_copy(cm->fc.partition_prob, vp9_partition_probs);
	vp9_copy(cm->fc.intra_inter_prob, default_intra_inter_p);
	vp9_copy(cm->fc.comp_inter_prob, default_comp_inter_p);
	vp9_copy(cm->fc.comp_ref_prob, default_comp_ref_p);
	vp9_copy(cm->fc.single_ref_prob, default_single_ref_p);
	vp9_copy(cm->fc.tx_probs_32x32p, vp9_default_tx_probs_32x32p);
	vp9_copy(cm->fc.tx_probs_16x16p, vp9_default_tx_probs_16x16p);
	vp9_copy(cm->fc.tx_probs_8x8p, vp9_default_tx_probs_8x8p);
	vp9_copy(cm->fc.mbskip_probs, vp9_default_mbskip_probs);
	}

	const vp9_tree_index vp9_switchable_interp_tree[VP9_SWITCHABLE_FILTERS*2-2] = {
	-0, 2,
	-1, -2
	};
	struct vp9_token vp9_switchable_interp_encodings[VP9_SWITCHABLE_FILTERS];
	const INTERPOLATIONFILTERTYPE vp9_switchable_interp[VP9_SWITCHABLE_FILTERS] = {
	EIGHTTAP, EIGHTTAP_SMOOTH, EIGHTTAP_SHARP};
	const int vp9_switchable_interp_map[SWITCHABLE+1] = {1, 0, 2, -1, -1};
	const vp9_prob vp9_switchable_interp_prob [VP9_SWITCHABLE_FILTERS+1]
	[VP9_SWITCHABLE_FILTERS-1] = {
	{ 235, 162, },
	{ 36, 255, },
	{ 34, 3, },
	{ 149, 144, },
	};

	// Indicates if the filter is interpolating or non-interpolating
	const int vp9_is_interpolating_filter[SWITCHABLE + 1] = {1, 1, 1, 1, -1};

	void vp9_entropy_mode_init() {
	vp9_tokens_from_tree(vp9_intra_mode_encodings, vp9_intra_mode_tree);
	vp9_tokens_from_tree(vp9_switchable_interp_encodings,
	vp9_switchable_interp_tree);
	vp9_tokens_from_tree(vp9_partition_encodings, vp9_partition_tree);
	vp9_tokens_from_tree_offset(vp9_sb_mv_ref_encoding_array,
	vp9_sb_mv_ref_tree, NEARESTMV);
	}

	void vp9_init_mode_contexts(VP9_COMMON *pc) {
	vpx_memset(pc->fc.inter_mode_counts, 0, sizeof(pc->fc.inter_mode_counts));
	vpx_memcpy(pc->fc.inter_mode_probs, default_inter_mode_probs,
	sizeof(default_inter_mode_probs));
	}

	void vp9_accum_mv_refs(VP9_COMMON *pc,
	MB_PREDICTION_MODE m,
	const int context) {
	unsigned int (*inter_mode_counts)[VP9_INTER_MODES - 1][2] =
	pc->fc.inter_mode_counts;

	if (m == ZEROMV) {
	++inter_mode_counts[context][0][0];
	} else {
	++inter_mode_counts[context][0][1];
	if (m == NEARESTMV) {
	++inter_mode_counts[context][1][0];
	} else {
	++inter_mode_counts[context][1][1];
	if (m == NEARMV) {
	++inter_mode_counts[context][2][0];
	} else {
	++inter_mode_counts[context][2][1];
	}
	}
	}
	}

	#define MVREF_COUNT_SAT 20
	#define MVREF_MAX_UPDATE_FACTOR 128
	void vp9_adapt_mode_context(VP9_COMMON *pc) {
	int i, j;
	unsigned int (*inter_mode_counts)[VP9_INTER_MODES - 1][2] =
	pc->fc.inter_mode_counts;
	vp9_prob (*mode_context)[VP9_INTER_MODES - 1] = pc->fc.inter_mode_probs;

	for (j = 0; j < INTER_MODE_CONTEXTS; j++) {
	for (i = 0; i < VP9_INTER_MODES - 1; i++) {
	int count = inter_mode_counts[j][i][0] + inter_mode_counts[j][i][1];
	int factor;
	count = count > MVREF_COUNT_SAT ? MVREF_COUNT_SAT : count;
	factor = (MVREF_MAX_UPDATE_FACTOR * count / MVREF_COUNT_SAT);
	mode_context[j][i] = weighted_prob(
	pc->fc.pre_inter_mode_probs[j][i],
	get_binary_prob(inter_mode_counts[j][i][0],
	inter_mode_counts[j][i][1]),
	factor);
	}
	}
	}

	#define MODE_COUNT_SAT 20
	#define MODE_MAX_UPDATE_FACTOR 128

	static int update_mode_ct(vp9_prob pre_prob, vp9_prob prob,
	unsigned int ct[2]) {
	const int count = MIN(ct[0] + ct[1], MODE_COUNT_SAT);
	const int factor = MODE_MAX_UPDATE_FACTOR * count / MODE_COUNT_SAT;
	return weighted_prob(pre_prob, prob, factor);
	}

	static int update_mode_ct2(vp9_prob pre_prob, unsigned int ct[2]) {
	return update_mode_ct(pre_prob, get_binary_prob(ct[0], ct[1]), ct);
	}

	static vp9_prob update_tx_ct(vp9_prob prob, unsigned int ct[2]) {
	const int count = MIN(ct[0] + ct[1], MODE_COUNT_SAT);
	const int factor = count * MODE_MAX_UPDATE_FACTOR / MODE_COUNT_SAT;
	return weighted_prob(prob, get_binary_prob(ct[0], ct[1]), factor);
	}

	static void update_mode_probs(int n_modes,
	const vp9_tree_index tree, unsigned int cnt,
	vp9_prob pre_probs, vp9_prob dst_probs,
	unsigned int tok0_offset) {
	#define MAX_PROBS 32
	vp9_prob probs[MAX_PROBS];
	unsigned int branch_ct[MAX_PROBS][2];
	int t;

	assert(n_modes - 1 < MAX_PROBS);
	vp9_tree_probs_from_distribution(tree, probs, branch_ct, cnt, tok0_offset);
	for (t = 0; t < n_modes - 1; ++t)
	dst_probs[t] = update_mode_ct(pre_probs[t], probs[t], branch_ct[t]);
	}

	// #define MODE_COUNT_TESTING
	void vp9_adapt_mode_probs(VP9_COMMON *cm) {
	int i, j;
	FRAME_CONTEXT *fc = &cm->fc;
	#ifdef MODE_COUNT_TESTING
	int t;

	printf("static const unsigned int\nymode_counts"
	"[VP9_INTRA_MODES] = {\n");
	for (t = 0; t < VP9_INTRA_MODES; ++t)
	printf("%d, ", fc->ymode_counts[t]);
	printf("};\n");
	printf("static const unsigned int\nuv_mode_counts"
	"[VP9_INTRA_MODES] [VP9_INTRA_MODES] = {\n");
	for (i = 0; i < VP9_INTRA_MODES; ++i) {
	printf(" {");
	for (t = 0; t < VP9_INTRA_MODES; ++t)
	printf("%d, ", fc->uv_mode_counts[i][t]);
	printf("},\n");
	}
	printf("};\n");
	printf("static const unsigned int\nbmode_counts"
	"[VP9_NKF_BINTRAMODES] = {\n");
	for (t = 0; t < VP9_NKF_BINTRAMODES; ++t)
	printf("%d, ", fc->bmode_counts[t]);
	printf("};\n");
	printf("static const unsigned int\ni8x8_mode_counts"
	"[VP9_I8X8_MODES] = {\n");
	for (t = 0; t < VP9_I8X8_MODES; ++t)
	printf("%d, ", fc->i8x8_mode_counts[t]);
	printf("};\n");
	printf("static const unsigned int\nmbsplit_counts"
	"[VP9_NUMMBSPLITS] = {\n");
	for (t = 0; t < VP9_NUMMBSPLITS; ++t)
	printf("%d, ", fc->mbsplit_counts[t]);
	printf("};\n");
	#endif

	for (i = 0; i < INTRA_INTER_CONTEXTS; i++)
	fc->intra_inter_prob[i] = update_mode_ct2(fc->pre_intra_inter_prob[i],
	fc->intra_inter_count[i]);
	for (i = 0; i < COMP_INTER_CONTEXTS; i++)
	fc->comp_inter_prob[i] = update_mode_ct2(fc->pre_comp_inter_prob[i],
	fc->comp_inter_count[i]);
	for (i = 0; i < REF_CONTEXTS; i++)
	fc->comp_ref_prob[i] = update_mode_ct2(fc->pre_comp_ref_prob[i],
	fc->comp_ref_count[i]);
	for (i = 0; i < REF_CONTEXTS; i++)
	for (j = 0; j < 2; j++)
	fc->single_ref_prob[i][j] = update_mode_ct2(fc->pre_single_ref_prob[i][j],
	fc->single_ref_count[i][j]);

	for (i = 0; i < BLOCK_SIZE_GROUPS; i++)
	update_mode_probs(VP9_INTRA_MODES, vp9_intra_mode_tree,
	fc->y_mode_counts[i], fc->pre_y_mode_prob[i],
	fc->y_mode_prob[i], 0);

	for (i = 0; i < VP9_INTRA_MODES; ++i)
	update_mode_probs(VP9_INTRA_MODES, vp9_intra_mode_tree,
	fc->uv_mode_counts[i], fc->pre_uv_mode_prob[i],
	fc->uv_mode_prob[i], 0);

	for (i = 0; i < NUM_PARTITION_CONTEXTS; i++)
	update_mode_probs(PARTITION_TYPES, vp9_partition_tree,
	fc->partition_counts[i], fc->pre_partition_prob[i],
	fc->partition_prob[INTER_FRAME][i], 0);

	if (cm->mcomp_filter_type == SWITCHABLE) {
	for (i = 0; i <= VP9_SWITCHABLE_FILTERS; i++)
	update_mode_probs(VP9_SWITCHABLE_FILTERS, vp9_switchable_interp_tree,
	fc->switchable_interp_count[i],
	fc->pre_switchable_interp_prob[i],
	fc->switchable_interp_prob[i], 0);
	}

	if (cm->txfm_mode == TX_MODE_SELECT) {
	int j;
	unsigned int branch_ct_8x8p[TX_SIZE_MAX_SB - 3][2];
	unsigned int branch_ct_16x16p[TX_SIZE_MAX_SB - 2][2];
	unsigned int branch_ct_32x32p[TX_SIZE_MAX_SB - 1][2];

	for (i = 0; i < TX_SIZE_CONTEXTS; ++i) {
	tx_counts_to_branch_counts_8x8(fc->tx_count_8x8p[i], branch_ct_8x8p);
	for (j = 0; j < TX_SIZE_MAX_SB - 3; ++j)
	fc->tx_probs_8x8p[i][j] = update_tx_ct(fc->pre_tx_probs_8x8p[i][j],
	branch_ct_8x8p[j]);

	tx_counts_to_branch_counts_16x16(fc->tx_count_16x16p[i],
	branch_ct_16x16p);
	for (j = 0; j < TX_SIZE_MAX_SB - 2; ++j)
	fc->tx_probs_16x16p[i][j] = update_tx_ct(fc->pre_tx_probs_16x16p[i][j],
	branch_ct_16x16p[j]);

	tx_counts_to_branch_counts_32x32(fc->tx_count_32x32p[i],
	branch_ct_32x32p);
	for (j = 0; j < TX_SIZE_MAX_SB - 1; ++j)
	fc->tx_probs_32x32p[i][j] = update_tx_ct(fc->pre_tx_probs_32x32p[i][j],
	branch_ct_32x32p[j]);
	}
	}

	for (i = 0; i < MBSKIP_CONTEXTS; ++i)
	fc->mbskip_probs[i] = update_mode_ct2(fc->pre_mbskip_probs[i],
	fc->mbskip_count[i]);
	}

	static void set_default_lf_deltas(MACROBLOCKD *xd) {
	xd->mode_ref_lf_delta_enabled = 1;
	xd->mode_ref_lf_delta_update = 1;

	xd->ref_lf_deltas[INTRA_FRAME] = 1;
	xd->ref_lf_deltas[LAST_FRAME] = 0;
	xd->ref_lf_deltas[GOLDEN_FRAME] = -1;
	xd->ref_lf_deltas[ALTREF_FRAME] = -1;

	xd->mode_lf_deltas[0] = 0; // Zero
	xd->mode_lf_deltas[1] = 0; // New mv
	}

	void vp9_setup_past_independence(VP9_COMMON cm, MACROBLOCKD xd) {
	// Reset the segment feature data to the default stats:
	// Features disabled, 0, with delta coding (Default state).
	int i;
	vp9_clearall_segfeatures(&xd->seg);
	xd->seg.abs_delta = SEGMENT_DELTADATA;
	if (cm->last_frame_seg_map)
	vpx_memset(cm->last_frame_seg_map, 0, (cm->mi_rows * cm->mi_cols));

	// Reset the mode ref deltas for loop filter
	vpx_memset(xd->last_ref_lf_deltas, 0, sizeof(xd->last_ref_lf_deltas));
	vpx_memset(xd->last_mode_lf_deltas, 0, sizeof(xd->last_mode_lf_deltas));
	set_default_lf_deltas(xd);

	vp9_default_coef_probs(cm);
	vp9_init_mbmode_probs(cm);
	vpx_memcpy(cm->kf_y_mode_prob, vp9_kf_default_bmode_probs,
	sizeof(vp9_kf_default_bmode_probs));
	vp9_init_mv_probs(cm);

	// To force update of the sharpness
	cm->last_sharpness_level = -1;

	vp9_init_mode_contexts(cm);

	if ((cm->frame_type == KEY_FRAME) \|\|
	cm->error_resilient_mode \|\| (cm->reset_frame_context == 3)) {
	// Reset all frame contexts.
	for (i = 0; i < NUM_FRAME_CONTEXTS; ++i)
	vpx_memcpy(&cm->frame_contexts[i], &cm->fc, sizeof(cm->fc));
	} else if (cm->reset_frame_context == 2) {
	// Reset only the frame context specified in the frame header.
	vpx_memcpy(&cm->frame_contexts[cm->frame_context_idx], &cm->fc,
	sizeof(cm->fc));
	}

	vpx_memset(cm->prev_mip, 0,
	cm->mode_info_stride * (cm->mi_rows + 1) * sizeof(MODE_INFO));
	vpx_memset(cm->mip, 0,
	cm->mode_info_stride * (cm->mi_rows + 1) * sizeof(MODE_INFO));

	vp9_update_mode_info_border(cm, cm->mip);
	vp9_update_mode_info_in_image(cm, cm->mi);

	vp9_update_mode_info_border(cm, cm->prev_mip);
	vp9_update_mode_info_in_image(cm, cm->prev_mi);

	vpx_memset(cm->ref_frame_sign_bias, 0, sizeof(cm->ref_frame_sign_bias));

	cm->frame_context_idx = 0;
	}