bf82514b54
Replace vp9_ in names to vpx_ as they are not codec specific. Change-Id: I2e583aa63dee769353ada4b42417aa15c4074ebb
270 lines
8.6 KiB
C
270 lines
8.6 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "vpx_mem/vpx_mem.h"
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#include "vpx_ports/mem.h"
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#include "vp9/common/vp9_blockd.h"
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#include "vp9/common/vp9_common.h"
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#include "vp9/common/vp9_entropy.h"
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#if CONFIG_COEFFICIENT_RANGE_CHECKING
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#include "vp9/common/vp9_idct.h"
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#endif
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#include "vp9/decoder/vp9_detokenize.h"
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#define EOB_CONTEXT_NODE 0
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#define ZERO_CONTEXT_NODE 1
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#define ONE_CONTEXT_NODE 2
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#define LOW_VAL_CONTEXT_NODE 0
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#define TWO_CONTEXT_NODE 1
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#define THREE_CONTEXT_NODE 2
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#define HIGH_LOW_CONTEXT_NODE 3
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#define CAT_ONE_CONTEXT_NODE 4
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#define CAT_THREEFOUR_CONTEXT_NODE 5
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#define CAT_THREE_CONTEXT_NODE 6
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#define CAT_FIVE_CONTEXT_NODE 7
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#define INCREMENT_COUNT(token) \
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do { \
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if (counts) \
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++coef_counts[band][ctx][token]; \
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} while (0)
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static INLINE int read_coeff(const vpx_prob *probs, int n, vpx_reader *r) {
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int i, val = 0;
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for (i = 0; i < n; ++i)
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val = (val << 1) | vpx_read(r, probs[i]);
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return val;
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}
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static int decode_coefs(const MACROBLOCKD *xd,
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PLANE_TYPE type,
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tran_low_t *dqcoeff, TX_SIZE tx_size, const int16_t *dq,
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int ctx, const int16_t *scan, const int16_t *nb,
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vpx_reader *r) {
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FRAME_COUNTS *counts = xd->counts;
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const int max_eob = 16 << (tx_size << 1);
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const FRAME_CONTEXT *const fc = xd->fc;
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const int ref = is_inter_block(&xd->mi[0]->mbmi);
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int band, c = 0;
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const vpx_prob (*coef_probs)[COEFF_CONTEXTS][UNCONSTRAINED_NODES] =
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fc->coef_probs[tx_size][type][ref];
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const vpx_prob *prob;
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unsigned int (*coef_counts)[COEFF_CONTEXTS][UNCONSTRAINED_NODES + 1];
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unsigned int (*eob_branch_count)[COEFF_CONTEXTS];
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uint8_t token_cache[32 * 32];
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const uint8_t *band_translate = get_band_translate(tx_size);
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const int dq_shift = (tx_size == TX_32X32);
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int v, token;
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int16_t dqv = dq[0];
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const uint8_t *cat1_prob;
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const uint8_t *cat2_prob;
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const uint8_t *cat3_prob;
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const uint8_t *cat4_prob;
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const uint8_t *cat5_prob;
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const uint8_t *cat6_prob;
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if (counts) {
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coef_counts = counts->coef[tx_size][type][ref];
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eob_branch_count = counts->eob_branch[tx_size][type][ref];
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}
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#if CONFIG_VP9_HIGHBITDEPTH
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if (xd->bd > VPX_BITS_8) {
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if (xd->bd == VPX_BITS_10) {
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cat1_prob = vp9_cat1_prob_high10;
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cat2_prob = vp9_cat2_prob_high10;
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cat3_prob = vp9_cat3_prob_high10;
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cat4_prob = vp9_cat4_prob_high10;
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cat5_prob = vp9_cat5_prob_high10;
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cat6_prob = vp9_cat6_prob_high10;
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} else {
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cat1_prob = vp9_cat1_prob_high12;
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cat2_prob = vp9_cat2_prob_high12;
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cat3_prob = vp9_cat3_prob_high12;
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cat4_prob = vp9_cat4_prob_high12;
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cat5_prob = vp9_cat5_prob_high12;
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cat6_prob = vp9_cat6_prob_high12;
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}
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} else {
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cat1_prob = vp9_cat1_prob;
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cat2_prob = vp9_cat2_prob;
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cat3_prob = vp9_cat3_prob;
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cat4_prob = vp9_cat4_prob;
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cat5_prob = vp9_cat5_prob;
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cat6_prob = vp9_cat6_prob;
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}
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#else
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cat1_prob = vp9_cat1_prob;
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cat2_prob = vp9_cat2_prob;
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cat3_prob = vp9_cat3_prob;
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cat4_prob = vp9_cat4_prob;
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cat5_prob = vp9_cat5_prob;
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cat6_prob = vp9_cat6_prob;
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#endif
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while (c < max_eob) {
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int val = -1;
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band = *band_translate++;
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prob = coef_probs[band][ctx];
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if (counts)
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++eob_branch_count[band][ctx];
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if (!vpx_read(r, prob[EOB_CONTEXT_NODE])) {
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INCREMENT_COUNT(EOB_MODEL_TOKEN);
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break;
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}
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while (!vpx_read(r, prob[ZERO_CONTEXT_NODE])) {
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INCREMENT_COUNT(ZERO_TOKEN);
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dqv = dq[1];
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token_cache[scan[c]] = 0;
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++c;
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if (c >= max_eob)
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return c; // zero tokens at the end (no eob token)
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ctx = get_coef_context(nb, token_cache, c);
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band = *band_translate++;
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prob = coef_probs[band][ctx];
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}
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if (!vpx_read(r, prob[ONE_CONTEXT_NODE])) {
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INCREMENT_COUNT(ONE_TOKEN);
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token = ONE_TOKEN;
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val = 1;
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} else {
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INCREMENT_COUNT(TWO_TOKEN);
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token = vpx_read_tree(r, vp9_coef_con_tree,
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vp9_pareto8_full[prob[PIVOT_NODE] - 1]);
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switch (token) {
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case TWO_TOKEN:
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case THREE_TOKEN:
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case FOUR_TOKEN:
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val = token;
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break;
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case CATEGORY1_TOKEN:
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val = CAT1_MIN_VAL + read_coeff(cat1_prob, 1, r);
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break;
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case CATEGORY2_TOKEN:
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val = CAT2_MIN_VAL + read_coeff(cat2_prob, 2, r);
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break;
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case CATEGORY3_TOKEN:
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val = CAT3_MIN_VAL + read_coeff(cat3_prob, 3, r);
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break;
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case CATEGORY4_TOKEN:
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val = CAT4_MIN_VAL + read_coeff(cat4_prob, 4, r);
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break;
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case CATEGORY5_TOKEN:
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val = CAT5_MIN_VAL + read_coeff(cat5_prob, 5, r);
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break;
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case CATEGORY6_TOKEN:
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#if CONFIG_VP9_HIGHBITDEPTH
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switch (xd->bd) {
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case VPX_BITS_8:
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val = CAT6_MIN_VAL + read_coeff(cat6_prob, 14, r);
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break;
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case VPX_BITS_10:
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val = CAT6_MIN_VAL + read_coeff(cat6_prob, 16, r);
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break;
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case VPX_BITS_12:
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val = CAT6_MIN_VAL + read_coeff(cat6_prob, 18, r);
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break;
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default:
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assert(0);
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return -1;
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}
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#else
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val = CAT6_MIN_VAL + read_coeff(cat6_prob, 14, r);
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#endif
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break;
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}
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}
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v = (val * dqv) >> dq_shift;
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#if CONFIG_COEFFICIENT_RANGE_CHECKING
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#if CONFIG_VP9_HIGHBITDEPTH
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dqcoeff[scan[c]] = highbd_check_range((vpx_read_bit(r) ? -v : v),
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xd->bd);
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#else
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dqcoeff[scan[c]] = check_range(vpx_read_bit(r) ? -v : v);
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#endif // CONFIG_VP9_HIGHBITDEPTH
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#else
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dqcoeff[scan[c]] = vpx_read_bit(r) ? -v : v;
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#endif // CONFIG_COEFFICIENT_RANGE_CHECKING
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token_cache[scan[c]] = vp9_pt_energy_class[token];
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++c;
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ctx = get_coef_context(nb, token_cache, c);
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dqv = dq[1];
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}
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return c;
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}
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// TODO(slavarnway): Decode version of vp9_set_context. Modify vp9_set_context
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// after testing is complete, then delete this version.
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static
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void dec_set_contexts(const MACROBLOCKD *xd, struct macroblockd_plane *pd,
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TX_SIZE tx_size, int has_eob,
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int aoff, int loff) {
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ENTROPY_CONTEXT *const a = pd->above_context + aoff;
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ENTROPY_CONTEXT *const l = pd->left_context + loff;
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const int tx_size_in_blocks = 1 << tx_size;
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// above
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if (has_eob && xd->mb_to_right_edge < 0) {
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int i;
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const int blocks_wide = pd->n4_w +
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(xd->mb_to_right_edge >> (5 + pd->subsampling_x));
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int above_contexts = tx_size_in_blocks;
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if (above_contexts + aoff > blocks_wide)
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above_contexts = blocks_wide - aoff;
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for (i = 0; i < above_contexts; ++i)
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a[i] = has_eob;
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for (i = above_contexts; i < tx_size_in_blocks; ++i)
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a[i] = 0;
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} else {
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memset(a, has_eob, sizeof(ENTROPY_CONTEXT) * tx_size_in_blocks);
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}
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// left
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if (has_eob && xd->mb_to_bottom_edge < 0) {
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int i;
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const int blocks_high = pd->n4_h +
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(xd->mb_to_bottom_edge >> (5 + pd->subsampling_y));
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int left_contexts = tx_size_in_blocks;
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if (left_contexts + loff > blocks_high)
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left_contexts = blocks_high - loff;
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for (i = 0; i < left_contexts; ++i)
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l[i] = has_eob;
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for (i = left_contexts; i < tx_size_in_blocks; ++i)
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l[i] = 0;
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} else {
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memset(l, has_eob, sizeof(ENTROPY_CONTEXT) * tx_size_in_blocks);
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}
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}
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int vp9_decode_block_tokens(MACROBLOCKD *xd,
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int plane, const scan_order *sc,
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int x, int y,
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TX_SIZE tx_size, vpx_reader *r,
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int seg_id) {
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struct macroblockd_plane *const pd = &xd->plane[plane];
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const int16_t *const dequant = pd->seg_dequant[seg_id];
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const int ctx = get_entropy_context(tx_size, pd->above_context + x,
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pd->left_context + y);
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const int eob = decode_coefs(xd, pd->plane_type,
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pd->dqcoeff, tx_size,
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dequant, ctx, sc->scan, sc->neighbors, r);
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dec_set_contexts(xd, pd, tx_size, eob > 0, x, y);
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return eob;
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}
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