michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include <math.h>
michael@0: #include <stdio.h>
michael@0: #include <string.h>
michael@0: #include <assert.h>
michael@0: #include "onyx_int.h"
michael@0: #include "tokenize.h"
michael@0: #include "vpx_mem/vpx_mem.h"
michael@0: 
michael@0: /* Global event counters used for accumulating statistics across several
michael@0:    compressions, then generating context.c = initial stats. */
michael@0: 
michael@0: #ifdef VP8_ENTROPY_STATS
michael@0: _int64 context_counters[BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [MAX_ENTROPY_TOKENS];
michael@0: #endif
michael@0: void vp8_stuff_mb(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t) ;
michael@0: void vp8_fix_contexts(MACROBLOCKD *x);
michael@0: 
michael@0: #include "dct_value_tokens.h"
michael@0: #include "dct_value_cost.h"
michael@0: 
michael@0: const TOKENVALUE *const vp8_dct_value_tokens_ptr = dct_value_tokens +
michael@0:         DCT_MAX_VALUE;
michael@0: const short *const vp8_dct_value_cost_ptr = dct_value_cost + DCT_MAX_VALUE;
michael@0: 
michael@0: #if 0
michael@0: int skip_true_count = 0;
michael@0: int skip_false_count = 0;
michael@0: #endif
michael@0: 
michael@0: /* function used to generate dct_value_tokens and dct_value_cost tables */
michael@0: /*
michael@0: static void fill_value_tokens()
michael@0: {
michael@0: 
michael@0:     TOKENVALUE *t = dct_value_tokens + DCT_MAX_VALUE;
michael@0:     const vp8_extra_bit_struct *e = vp8_extra_bits;
michael@0: 
michael@0:     int i = -DCT_MAX_VALUE;
michael@0:     int sign = 1;
michael@0: 
michael@0:     do
michael@0:     {
michael@0:         if (!i)
michael@0:             sign = 0;
michael@0: 
michael@0:         {
michael@0:             const int a = sign ? -i : i;
michael@0:             int eb = sign;
michael@0: 
michael@0:             if (a > 4)
michael@0:             {
michael@0:                 int j = 4;
michael@0: 
michael@0:                 while (++j < 11  &&  e[j].base_val <= a) {}
michael@0: 
michael@0:                 t[i].Token = --j;
michael@0:                 eb |= (a - e[j].base_val) << 1;
michael@0:             }
michael@0:             else
michael@0:                 t[i].Token = a;
michael@0: 
michael@0:             t[i].Extra = eb;
michael@0:         }
michael@0: 
michael@0:         // initialize the cost for extra bits for all possible coefficient value.
michael@0:         {
michael@0:             int cost = 0;
michael@0:             const vp8_extra_bit_struct *p = vp8_extra_bits + t[i].Token;
michael@0: 
michael@0:             if (p->base_val)
michael@0:             {
michael@0:                 const int extra = t[i].Extra;
michael@0:                 const int Length = p->Len;
michael@0: 
michael@0:                 if (Length)
michael@0:                     cost += vp8_treed_cost(p->tree, p->prob, extra >> 1, Length);
michael@0: 
michael@0:                 cost += vp8_cost_bit(vp8_prob_half, extra & 1); // sign
michael@0:                 dct_value_cost[i + DCT_MAX_VALUE] = cost;
michael@0:             }
michael@0: 
michael@0:         }
michael@0: 
michael@0:     }
michael@0:     while (++i < DCT_MAX_VALUE);
michael@0: 
michael@0:     vp8_dct_value_tokens_ptr = dct_value_tokens + DCT_MAX_VALUE;
michael@0:     vp8_dct_value_cost_ptr   = dct_value_cost + DCT_MAX_VALUE;
michael@0: }
michael@0: */
michael@0: 
michael@0: static void tokenize2nd_order_b
michael@0: (
michael@0:     MACROBLOCK *x,
michael@0:     TOKENEXTRA **tp,
michael@0:     VP8_COMP *cpi
michael@0: )
michael@0: {
michael@0:     MACROBLOCKD *xd = &x->e_mbd;
michael@0:     int pt;             /* near block/prev token context index */
michael@0:     int c;              /* start at DC */
michael@0:     TOKENEXTRA *t = *tp;/* store tokens starting here */
michael@0:     const BLOCKD *b;
michael@0:     const short *qcoeff_ptr;
michael@0:     ENTROPY_CONTEXT * a;
michael@0:     ENTROPY_CONTEXT * l;
michael@0:     int band, rc, v, token;
michael@0:     int eob;
michael@0: 
michael@0:     b = xd->block + 24;
michael@0:     qcoeff_ptr = b->qcoeff;
michael@0:     a = (ENTROPY_CONTEXT *)xd->above_context + 8;
michael@0:     l = (ENTROPY_CONTEXT *)xd->left_context + 8;
michael@0:     eob = xd->eobs[24];
michael@0:     VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
michael@0: 
michael@0:     if(!eob)
michael@0:     {
michael@0:         /* c = band for this case */
michael@0:         t->Token = DCT_EOB_TOKEN;
michael@0:         t->context_tree = cpi->common.fc.coef_probs [1] [0] [pt];
michael@0:         t->skip_eob_node = 0;
michael@0: 
michael@0:         ++x->coef_counts       [1] [0] [pt] [DCT_EOB_TOKEN];
michael@0:         t++;
michael@0:         *tp = t;
michael@0:         *a = *l = 0;
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     v = qcoeff_ptr[0];
michael@0:     t->Extra = vp8_dct_value_tokens_ptr[v].Extra;
michael@0:     token    = vp8_dct_value_tokens_ptr[v].Token;
michael@0:     t->Token = token;
michael@0: 
michael@0:     t->context_tree = cpi->common.fc.coef_probs [1] [0] [pt];
michael@0:     t->skip_eob_node = 0;
michael@0:     ++x->coef_counts       [1] [0] [pt] [token];
michael@0:     pt = vp8_prev_token_class[token];
michael@0:     t++;
michael@0:     c = 1;
michael@0: 
michael@0:     for (; c < eob; c++)
michael@0:     {
michael@0:         rc = vp8_default_zig_zag1d[c];
michael@0:         band = vp8_coef_bands[c];
michael@0:         v = qcoeff_ptr[rc];
michael@0: 
michael@0:         t->Extra = vp8_dct_value_tokens_ptr[v].Extra;
michael@0:         token    = vp8_dct_value_tokens_ptr[v].Token;
michael@0: 
michael@0:         t->Token = token;
michael@0:         t->context_tree = cpi->common.fc.coef_probs [1] [band] [pt];
michael@0: 
michael@0:         t->skip_eob_node = ((pt == 0));
michael@0: 
michael@0:         ++x->coef_counts       [1] [band] [pt] [token];
michael@0: 
michael@0:         pt = vp8_prev_token_class[token];
michael@0:         t++;
michael@0:     }
michael@0:     if (c < 16)
michael@0:     {
michael@0:         band = vp8_coef_bands[c];
michael@0:         t->Token = DCT_EOB_TOKEN;
michael@0:         t->context_tree = cpi->common.fc.coef_probs [1] [band] [pt];
michael@0: 
michael@0:         t->skip_eob_node = 0;
michael@0: 
michael@0:         ++x->coef_counts       [1] [band] [pt] [DCT_EOB_TOKEN];
michael@0: 
michael@0:         t++;
michael@0:     }
michael@0: 
michael@0:     *tp = t;
michael@0:     *a = *l = 1;
michael@0: 
michael@0: }
michael@0: 
michael@0: static void tokenize1st_order_b
michael@0: (
michael@0:     MACROBLOCK *x,
michael@0:     TOKENEXTRA **tp,
michael@0:     int type,           /* which plane: 0=Y no DC, 1=Y2, 2=UV, 3=Y with DC */
michael@0:     VP8_COMP *cpi
michael@0: )
michael@0: {
michael@0:     MACROBLOCKD *xd = &x->e_mbd;
michael@0:     unsigned int block;
michael@0:     const BLOCKD *b;
michael@0:     int pt;             /* near block/prev token context index */
michael@0:     int c;
michael@0:     int token;
michael@0:     TOKENEXTRA *t = *tp;/* store tokens starting here */
michael@0:     const short *qcoeff_ptr;
michael@0:     ENTROPY_CONTEXT * a;
michael@0:     ENTROPY_CONTEXT * l;
michael@0:     int band, rc, v;
michael@0:     int tmp1, tmp2;
michael@0: 
michael@0:     b = xd->block;
michael@0:     /* Luma */
michael@0:     for (block = 0; block < 16; block++, b++)
michael@0:     {
michael@0:         tmp1 = vp8_block2above[block];
michael@0:         tmp2 = vp8_block2left[block];
michael@0:         qcoeff_ptr = b->qcoeff;
michael@0:         a = (ENTROPY_CONTEXT *)xd->above_context + tmp1;
michael@0:         l = (ENTROPY_CONTEXT *)xd->left_context + tmp2;
michael@0: 
michael@0:         VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
michael@0: 
michael@0:         c = type ? 0 : 1;
michael@0: 
michael@0:         if(c >= *b->eob)
michael@0:         {
michael@0:             /* c = band for this case */
michael@0:             t->Token = DCT_EOB_TOKEN;
michael@0:             t->context_tree = cpi->common.fc.coef_probs [type] [c] [pt];
michael@0:             t->skip_eob_node = 0;
michael@0: 
michael@0:             ++x->coef_counts       [type] [c] [pt] [DCT_EOB_TOKEN];
michael@0:             t++;
michael@0:             *tp = t;
michael@0:             *a = *l = 0;
michael@0:             continue;
michael@0:         }
michael@0: 
michael@0:         v = qcoeff_ptr[c];
michael@0: 
michael@0:         t->Extra = vp8_dct_value_tokens_ptr[v].Extra;
michael@0:         token    = vp8_dct_value_tokens_ptr[v].Token;
michael@0:         t->Token = token;
michael@0: 
michael@0:         t->context_tree = cpi->common.fc.coef_probs [type] [c] [pt];
michael@0:         t->skip_eob_node = 0;
michael@0:         ++x->coef_counts       [type] [c] [pt] [token];
michael@0:         pt = vp8_prev_token_class[token];
michael@0:         t++;
michael@0:         c++;
michael@0: 
michael@0:         for (; c < *b->eob; c++)
michael@0:         {
michael@0:             rc = vp8_default_zig_zag1d[c];
michael@0:             band = vp8_coef_bands[c];
michael@0:             v = qcoeff_ptr[rc];
michael@0: 
michael@0:             t->Extra = vp8_dct_value_tokens_ptr[v].Extra;
michael@0:             token    = vp8_dct_value_tokens_ptr[v].Token;
michael@0: 
michael@0:             t->Token = token;
michael@0:             t->context_tree = cpi->common.fc.coef_probs [type] [band] [pt];
michael@0: 
michael@0:             t->skip_eob_node = (pt == 0);
michael@0:             ++x->coef_counts       [type] [band] [pt] [token];
michael@0: 
michael@0:             pt = vp8_prev_token_class[token];
michael@0:             t++;
michael@0:         }
michael@0:         if (c < 16)
michael@0:         {
michael@0:             band = vp8_coef_bands[c];
michael@0:             t->Token = DCT_EOB_TOKEN;
michael@0:             t->context_tree = cpi->common.fc.coef_probs [type] [band] [pt];
michael@0: 
michael@0:             t->skip_eob_node = 0;
michael@0:             ++x->coef_counts       [type] [band] [pt] [DCT_EOB_TOKEN];
michael@0: 
michael@0:             t++;
michael@0:         }
michael@0:         *tp = t;
michael@0:         *a = *l = 1;
michael@0:     }
michael@0: 
michael@0:     /* Chroma */
michael@0:     for (block = 16; block < 24; block++, b++)
michael@0:     {
michael@0:         tmp1 = vp8_block2above[block];
michael@0:         tmp2 = vp8_block2left[block];
michael@0:         qcoeff_ptr = b->qcoeff;
michael@0:         a = (ENTROPY_CONTEXT *)xd->above_context + tmp1;
michael@0:         l = (ENTROPY_CONTEXT *)xd->left_context + tmp2;
michael@0: 
michael@0:         VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
michael@0: 
michael@0:         if(!(*b->eob))
michael@0:         {
michael@0:             /* c = band for this case */
michael@0:             t->Token = DCT_EOB_TOKEN;
michael@0:             t->context_tree = cpi->common.fc.coef_probs [2] [0] [pt];
michael@0:             t->skip_eob_node = 0;
michael@0: 
michael@0:             ++x->coef_counts       [2] [0] [pt] [DCT_EOB_TOKEN];
michael@0:             t++;
michael@0:             *tp = t;
michael@0:             *a = *l = 0;
michael@0:             continue;
michael@0:         }
michael@0: 
michael@0:         v = qcoeff_ptr[0];
michael@0: 
michael@0:         t->Extra = vp8_dct_value_tokens_ptr[v].Extra;
michael@0:         token    = vp8_dct_value_tokens_ptr[v].Token;
michael@0:         t->Token = token;
michael@0: 
michael@0:         t->context_tree = cpi->common.fc.coef_probs [2] [0] [pt];
michael@0:         t->skip_eob_node = 0;
michael@0:         ++x->coef_counts       [2] [0] [pt] [token];
michael@0:         pt = vp8_prev_token_class[token];
michael@0:         t++;
michael@0:         c = 1;
michael@0: 
michael@0:         for (; c < *b->eob; c++)
michael@0:         {
michael@0:             rc = vp8_default_zig_zag1d[c];
michael@0:             band = vp8_coef_bands[c];
michael@0:             v = qcoeff_ptr[rc];
michael@0: 
michael@0:             t->Extra = vp8_dct_value_tokens_ptr[v].Extra;
michael@0:             token    = vp8_dct_value_tokens_ptr[v].Token;
michael@0: 
michael@0:             t->Token = token;
michael@0:             t->context_tree = cpi->common.fc.coef_probs [2] [band] [pt];
michael@0: 
michael@0:             t->skip_eob_node = (pt == 0);
michael@0: 
michael@0:             ++x->coef_counts       [2] [band] [pt] [token];
michael@0: 
michael@0:             pt = vp8_prev_token_class[token];
michael@0:             t++;
michael@0:         }
michael@0:         if (c < 16)
michael@0:         {
michael@0:             band = vp8_coef_bands[c];
michael@0:             t->Token = DCT_EOB_TOKEN;
michael@0:             t->context_tree = cpi->common.fc.coef_probs [2] [band] [pt];
michael@0: 
michael@0:             t->skip_eob_node = 0;
michael@0: 
michael@0:             ++x->coef_counts       [2] [band] [pt] [DCT_EOB_TOKEN];
michael@0: 
michael@0:             t++;
michael@0:         }
michael@0:         *tp = t;
michael@0:         *a = *l = 1;
michael@0:     }
michael@0: }
michael@0: 
michael@0: 
michael@0: static int mb_is_skippable(MACROBLOCKD *x, int has_y2_block)
michael@0: {
michael@0:     int skip = 1;
michael@0:     int i = 0;
michael@0: 
michael@0:     if (has_y2_block)
michael@0:     {
michael@0:         for (i = 0; i < 16; i++)
michael@0:             skip &= (x->eobs[i] < 2);
michael@0:     }
michael@0: 
michael@0:     for (; i < 24 + has_y2_block; i++)
michael@0:         skip &= (!x->eobs[i]);
michael@0: 
michael@0:     return skip;
michael@0: }
michael@0: 
michael@0: 
michael@0: void vp8_tokenize_mb(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t)
michael@0: {
michael@0:     MACROBLOCKD *xd = &x->e_mbd;
michael@0:     int plane_type;
michael@0:     int has_y2_block;
michael@0: 
michael@0:     has_y2_block = (xd->mode_info_context->mbmi.mode != B_PRED
michael@0:                     && xd->mode_info_context->mbmi.mode != SPLITMV);
michael@0: 
michael@0:     xd->mode_info_context->mbmi.mb_skip_coeff =
michael@0:         mb_is_skippable(xd, has_y2_block);
michael@0:     if (xd->mode_info_context->mbmi.mb_skip_coeff)
michael@0:     {
michael@0:         if (!cpi->common.mb_no_coeff_skip)
michael@0:         {
michael@0:             vp8_stuff_mb(cpi, x, t);
michael@0:         }
michael@0:         else
michael@0:         {
michael@0:             vp8_fix_contexts(xd);
michael@0:             x->skip_true_count++;
michael@0:         }
michael@0: 
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     plane_type = 3;
michael@0:     if(has_y2_block)
michael@0:     {
michael@0:         tokenize2nd_order_b(x, t, cpi);
michael@0:         plane_type = 0;
michael@0:     }
michael@0: 
michael@0:     tokenize1st_order_b(x, t, plane_type, cpi);
michael@0: }
michael@0: 
michael@0: 
michael@0: #ifdef VP8_ENTROPY_STATS
michael@0: 
michael@0: void init_context_counters(void)
michael@0: {
michael@0:     vpx_memset(context_counters, 0, sizeof(context_counters));
michael@0: }
michael@0: 
michael@0: void print_context_counters()
michael@0: {
michael@0: 
michael@0:     int type, band, pt, t;
michael@0: 
michael@0:     FILE *const f = fopen("context.c", "w");
michael@0: 
michael@0:     fprintf(f, "#include \"entropy.h\"\n");
michael@0: 
michael@0:     fprintf(f, "\n/* *** GENERATED FILE: DO NOT EDIT *** */\n\n");
michael@0: 
michael@0:     fprintf(f, "int Contexts[BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [MAX_ENTROPY_TOKENS];\n\n");
michael@0: 
michael@0:     fprintf(f, "const int default_contexts[BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [MAX_ENTROPY_TOKENS] = {");
michael@0: 
michael@0: # define Comma( X) (X? ",":"")
michael@0: 
michael@0:     type = 0;
michael@0: 
michael@0:     do
michael@0:     {
michael@0:         fprintf(f, "%s\n  { /* block Type %d */", Comma(type), type);
michael@0: 
michael@0:         band = 0;
michael@0: 
michael@0:         do
michael@0:         {
michael@0:             fprintf(f, "%s\n    { /* Coeff Band %d */", Comma(band), band);
michael@0: 
michael@0:             pt = 0;
michael@0: 
michael@0:             do
michael@0:             {
michael@0:                 fprintf(f, "%s\n      {", Comma(pt));
michael@0: 
michael@0:                 t = 0;
michael@0: 
michael@0:                 do
michael@0:                 {
michael@0:                     const _int64 x = context_counters [type] [band] [pt] [t];
michael@0:                     const int y = (int) x;
michael@0: 
michael@0:                     assert(x == (_int64) y);  /* no overflow handling yet */
michael@0:                     fprintf(f, "%s %d", Comma(t), y);
michael@0: 
michael@0:                 }
michael@0:                 while (++t < MAX_ENTROPY_TOKENS);
michael@0: 
michael@0:                 fprintf(f, "}");
michael@0:             }
michael@0:             while (++pt < PREV_COEF_CONTEXTS);
michael@0: 
michael@0:             fprintf(f, "\n    }");
michael@0: 
michael@0:         }
michael@0:         while (++band < COEF_BANDS);
michael@0: 
michael@0:         fprintf(f, "\n  }");
michael@0:     }
michael@0:     while (++type < BLOCK_TYPES);
michael@0: 
michael@0:     fprintf(f, "\n};\n");
michael@0:     fclose(f);
michael@0: }
michael@0: #endif
michael@0: 
michael@0: 
michael@0: static void stuff2nd_order_b
michael@0: (
michael@0:     TOKENEXTRA **tp,
michael@0:     ENTROPY_CONTEXT *a,
michael@0:     ENTROPY_CONTEXT *l,
michael@0:     VP8_COMP *cpi,
michael@0:     MACROBLOCK *x
michael@0: )
michael@0: {
michael@0:     int pt; /* near block/prev token context index */
michael@0:     TOKENEXTRA *t = *tp;        /* store tokens starting here */
michael@0:     VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
michael@0: 
michael@0:     t->Token = DCT_EOB_TOKEN;
michael@0:     t->context_tree = cpi->common.fc.coef_probs [1] [0] [pt];
michael@0:     t->skip_eob_node = 0;
michael@0:     ++x->coef_counts       [1] [0] [pt] [DCT_EOB_TOKEN];
michael@0:     ++t;
michael@0: 
michael@0:     *tp = t;
michael@0:     pt = 0;
michael@0:     *a = *l = pt;
michael@0: }
michael@0: 
michael@0: static void stuff1st_order_b
michael@0: (
michael@0:     TOKENEXTRA **tp,
michael@0:     ENTROPY_CONTEXT *a,
michael@0:     ENTROPY_CONTEXT *l,
michael@0:     int type,
michael@0:     VP8_COMP *cpi,
michael@0:     MACROBLOCK *x
michael@0: )
michael@0: {
michael@0:     int pt; /* near block/prev token context index */
michael@0:     int band;
michael@0:     TOKENEXTRA *t = *tp;        /* store tokens starting here */
michael@0:     VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
michael@0:     band = type ? 0 : 1;
michael@0:     t->Token = DCT_EOB_TOKEN;
michael@0:     t->context_tree = cpi->common.fc.coef_probs [type] [band] [pt];
michael@0:     t->skip_eob_node = 0;
michael@0:     ++x->coef_counts       [type] [band] [pt] [DCT_EOB_TOKEN];
michael@0:     ++t;
michael@0:     *tp = t;
michael@0:     pt = 0; /* 0 <-> all coeff data is zero */
michael@0:     *a = *l = pt;
michael@0: }
michael@0: 
michael@0: static
michael@0: void stuff1st_order_buv
michael@0: (
michael@0:     TOKENEXTRA **tp,
michael@0:     ENTROPY_CONTEXT *a,
michael@0:     ENTROPY_CONTEXT *l,
michael@0:     VP8_COMP *cpi,
michael@0:     MACROBLOCK *x
michael@0: )
michael@0: {
michael@0:     int pt; /* near block/prev token context index */
michael@0:     TOKENEXTRA *t = *tp;        /* store tokens starting here */
michael@0:     VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
michael@0: 
michael@0:     t->Token = DCT_EOB_TOKEN;
michael@0:     t->context_tree = cpi->common.fc.coef_probs [2] [0] [pt];
michael@0:     t->skip_eob_node = 0;
michael@0:     ++x->coef_counts[2] [0] [pt] [DCT_EOB_TOKEN];
michael@0:     ++t;
michael@0:     *tp = t;
michael@0:     pt = 0; /* 0 <-> all coeff data is zero */
michael@0:     *a = *l = pt;
michael@0: }
michael@0: 
michael@0: void vp8_stuff_mb(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t)
michael@0: {
michael@0:     MACROBLOCKD *xd = &x->e_mbd;
michael@0:     ENTROPY_CONTEXT * A = (ENTROPY_CONTEXT *)xd->above_context;
michael@0:     ENTROPY_CONTEXT * L = (ENTROPY_CONTEXT *)xd->left_context;
michael@0:     int plane_type;
michael@0:     int b;
michael@0:     plane_type = 3;
michael@0:     if((xd->mode_info_context->mbmi.mode != B_PRED
michael@0:                         && xd->mode_info_context->mbmi.mode != SPLITMV))
michael@0:     {
michael@0:         stuff2nd_order_b(t,
michael@0:                      A + vp8_block2above[24], L + vp8_block2left[24], cpi, x);
michael@0:         plane_type = 0;
michael@0:     }
michael@0: 
michael@0:     for (b = 0; b < 16; b++)
michael@0:         stuff1st_order_b(t,
michael@0:                          A + vp8_block2above[b],
michael@0:                          L + vp8_block2left[b], plane_type, cpi, x);
michael@0: 
michael@0:     for (b = 16; b < 24; b++)
michael@0:         stuff1st_order_buv(t,
michael@0:                            A + vp8_block2above[b],
michael@0:                            L + vp8_block2left[b], cpi, x);
michael@0: 
michael@0: }
michael@0: void vp8_fix_contexts(MACROBLOCKD *x)
michael@0: {
michael@0:     /* Clear entropy contexts for Y2 blocks */
michael@0:     if (x->mode_info_context->mbmi.mode != B_PRED && x->mode_info_context->mbmi.mode != SPLITMV)
michael@0:     {
michael@0:         vpx_memset(x->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
michael@0:         vpx_memset(x->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
michael@0:     }
michael@0:     else
michael@0:     {
michael@0:         vpx_memset(x->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1);
michael@0:         vpx_memset(x->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1);
michael@0:     }
michael@0: 
michael@0: }