238 lines
7.7 KiB
C
238 lines
7.7 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_seg_common.h"
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#include "vp9/decoder/vp9_dboolhuff.h"
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#include "vp9/decoder/vp9_detokenize.h"
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#include "vp9/decoder/vp9_onyxd_int.h"
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#include "vp9/decoder/vp9_treereader.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 CAT1_MIN_VAL 5
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#define CAT2_MIN_VAL 7
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#define CAT3_MIN_VAL 11
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#define CAT4_MIN_VAL 19
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#define CAT5_MIN_VAL 35
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#define CAT6_MIN_VAL 67
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#define CAT1_PROB0 159
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#define CAT2_PROB0 145
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#define CAT2_PROB1 165
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#define CAT3_PROB0 140
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#define CAT3_PROB1 148
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#define CAT3_PROB2 173
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#define CAT4_PROB0 135
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#define CAT4_PROB1 140
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#define CAT4_PROB2 155
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#define CAT4_PROB3 176
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#define CAT5_PROB0 130
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#define CAT5_PROB1 134
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#define CAT5_PROB2 141
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#define CAT5_PROB3 157
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#define CAT5_PROB4 180
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static const vp9_prob cat6_prob[15] = {
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254, 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0
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};
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static const int token_to_counttoken[MAX_ENTROPY_TOKENS] = {
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ZERO_TOKEN, ONE_TOKEN, TWO_TOKEN, TWO_TOKEN,
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TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, TWO_TOKEN,
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TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, DCT_EOB_MODEL_TOKEN
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};
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#define INCREMENT_COUNT(token) \
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do { \
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if (!cm->frame_parallel_decoding_mode) \
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++coef_counts[band][pt][token_to_counttoken[token]]; \
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} while (0)
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#define WRITE_COEF_CONTINUE(val, token) \
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{ \
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v = (val * dqv) >> dq_shift; \
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dqcoeff_ptr[scan[c]] = (vp9_read_bit(r) ? -v : v); \
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INCREMENT_COUNT(token); \
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token_cache[scan[c]] = vp9_pt_energy_class[token]; \
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++c; \
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dqv = dq[1]; \
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continue; \
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}
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#define ADJUST_COEF(prob, bits_count) \
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do { \
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val += (vp9_read(r, prob) << bits_count); \
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} while (0)
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static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
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vp9_reader *r, int block_idx,
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PLANE_TYPE type, int seg_eob, int16_t *dqcoeff_ptr,
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TX_SIZE tx_size, const int16_t *dq, int pt,
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uint8_t *token_cache) {
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const FRAME_CONTEXT *const fc = &cm->fc;
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FRAME_COUNTS *const counts = &cm->counts;
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const int ref = is_inter_block(&xd->mi_8x8[0]->mbmi);
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int band, c = 0;
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const vp9_prob (*coef_probs)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES] =
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fc->coef_probs[tx_size][type][ref];
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const vp9_prob *prob;
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unsigned int (*coef_counts)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES + 1] =
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counts->coef[tx_size][type][ref];
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unsigned int (*eob_branch_count)[PREV_COEF_CONTEXTS] =
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counts->eob_branch[tx_size][type][ref];
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const int16_t *scan, *nb;
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const uint8_t *cat6;
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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;
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int16_t dqv = dq[0];
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get_scan(xd, tx_size, type, block_idx, &scan, &nb);
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while (c < seg_eob) {
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int val;
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if (c)
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pt = get_coef_context(nb, token_cache, c);
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band = *band_translate++;
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prob = coef_probs[band][pt];
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if (!cm->frame_parallel_decoding_mode)
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++eob_branch_count[band][pt];
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if (!vp9_read(r, prob[EOB_CONTEXT_NODE]))
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break;
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goto DECODE_ZERO;
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SKIP_START:
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if (c >= seg_eob)
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break;
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if (c)
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pt = get_coef_context(nb, token_cache, c);
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band = *band_translate++;
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prob = coef_probs[band][pt];
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DECODE_ZERO:
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if (!vp9_read(r, prob[ZERO_CONTEXT_NODE])) {
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INCREMENT_COUNT(ZERO_TOKEN);
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token_cache[scan[c]] = vp9_pt_energy_class[ZERO_TOKEN];
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dqv = dq[1]; \
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++c;
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goto SKIP_START;
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}
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// ONE_CONTEXT_NODE_0_
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if (!vp9_read(r, prob[ONE_CONTEXT_NODE])) {
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WRITE_COEF_CONTINUE(1, ONE_TOKEN);
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}
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prob = vp9_pareto8_full[coef_probs[band][pt][PIVOT_NODE]-1];
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// LOW_VAL_CONTEXT_NODE_0_
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if (!vp9_read(r, prob[LOW_VAL_CONTEXT_NODE])) {
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if (!vp9_read(r, prob[TWO_CONTEXT_NODE])) {
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WRITE_COEF_CONTINUE(2, TWO_TOKEN);
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}
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if (!vp9_read(r, prob[THREE_CONTEXT_NODE])) {
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WRITE_COEF_CONTINUE(3, THREE_TOKEN);
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}
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WRITE_COEF_CONTINUE(4, FOUR_TOKEN);
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}
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// HIGH_LOW_CONTEXT_NODE_0_
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if (!vp9_read(r, prob[HIGH_LOW_CONTEXT_NODE])) {
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if (!vp9_read(r, prob[CAT_ONE_CONTEXT_NODE])) {
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val = CAT1_MIN_VAL;
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ADJUST_COEF(CAT1_PROB0, 0);
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY1);
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}
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val = CAT2_MIN_VAL;
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ADJUST_COEF(CAT2_PROB1, 1);
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ADJUST_COEF(CAT2_PROB0, 0);
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY2);
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}
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// CAT_THREEFOUR_CONTEXT_NODE_0_
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if (!vp9_read(r, prob[CAT_THREEFOUR_CONTEXT_NODE])) {
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if (!vp9_read(r, prob[CAT_THREE_CONTEXT_NODE])) {
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val = CAT3_MIN_VAL;
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ADJUST_COEF(CAT3_PROB2, 2);
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ADJUST_COEF(CAT3_PROB1, 1);
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ADJUST_COEF(CAT3_PROB0, 0);
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY3);
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}
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val = CAT4_MIN_VAL;
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ADJUST_COEF(CAT4_PROB3, 3);
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ADJUST_COEF(CAT4_PROB2, 2);
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ADJUST_COEF(CAT4_PROB1, 1);
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ADJUST_COEF(CAT4_PROB0, 0);
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY4);
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}
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// CAT_FIVE_CONTEXT_NODE_0_:
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if (!vp9_read(r, prob[CAT_FIVE_CONTEXT_NODE])) {
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val = CAT5_MIN_VAL;
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ADJUST_COEF(CAT5_PROB4, 4);
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ADJUST_COEF(CAT5_PROB3, 3);
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ADJUST_COEF(CAT5_PROB2, 2);
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ADJUST_COEF(CAT5_PROB1, 1);
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ADJUST_COEF(CAT5_PROB0, 0);
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY5);
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}
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val = 0;
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cat6 = cat6_prob;
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while (*cat6)
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val = (val << 1) | vp9_read(r, *cat6++);
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val += CAT6_MIN_VAL;
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WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY6);
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}
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if (c < seg_eob) {
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if (!cm->frame_parallel_decoding_mode)
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++coef_counts[band][pt][DCT_EOB_MODEL_TOKEN];
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}
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return c;
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}
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int vp9_decode_block_tokens(VP9_COMMON *cm, MACROBLOCKD *xd,
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int plane, int block, BLOCK_SIZE plane_bsize,
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int x, int y, TX_SIZE tx_size, vp9_reader *r,
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uint8_t *token_cache) {
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struct macroblockd_plane *const pd = &xd->plane[plane];
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const int seg_eob = get_tx_eob(&cm->seg, xd->mi_8x8[0]->mbmi.segment_id,
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tx_size);
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const int pt = 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(cm, xd, r, block, pd->plane_type, seg_eob,
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BLOCK_OFFSET(pd->dqcoeff, block), tx_size,
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pd->dequant, pt, token_cache);
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set_contexts(xd, pd, plane_bsize, tx_size, eob > 0, x, y);
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pd->eobs[block] = eob;
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return eob;
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}
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