295 lines
9.5 KiB
C
295 lines
9.5 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 3
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#define TWO_CONTEXT_NODE 4
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#define THREE_CONTEXT_NODE 5
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#define HIGH_LOW_CONTEXT_NODE 6
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#define CAT_ONE_CONTEXT_NODE 7
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#define CAT_THREEFOUR_CONTEXT_NODE 8
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#define CAT_THREE_CONTEXT_NODE 9
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#define CAT_FIVE_CONTEXT_NODE 10
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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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DECLARE_ALIGNED(16, extern const uint8_t,
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vp9_pt_energy_class[MAX_ENTROPY_TOKENS]);
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#define INCREMENT_COUNT(token) \
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do { \
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coef_counts[type][ref][band][pt] \
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[token >= TWO_TOKEN ? \
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(token == DCT_EOB_TOKEN ? DCT_EOB_MODEL_TOKEN : TWO_TOKEN) : \
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token]++; \
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token_cache[scan[c]] = vp9_pt_energy_class[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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qcoeff_ptr[scan[c]] = vp9_read_and_apply_sign(r, val) * \
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dq[c > 0] / (1 + (tx_size == TX_32X32)); \
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INCREMENT_COUNT(token); \
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c++; \
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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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if (vp9_read(r, prob)) \
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val += 1 << 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 *qcoeff_ptr,
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TX_SIZE tx_size, const int16_t *dq,
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ENTROPY_CONTEXT *A, ENTROPY_CONTEXT *L) {
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FRAME_CONTEXT *const fc = &cm->fc;
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FRAME_COUNTS *const counts = &cm->counts;
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ENTROPY_CONTEXT above_ec, left_ec;
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const int ref = is_inter_block(&xd->mode_info_context->mbmi);
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int band, pt, c = 0;
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vp9_prob (*coef_probs)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES] =
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fc->coef_probs[tx_size][type][ref];
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vp9_prob coef_probs_full[COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES];
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uint8_t load_map[COEF_BANDS][PREV_COEF_CONTEXTS] = { { 0 } };
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vp9_prob *prob;
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vp9_coeff_count_model *coef_counts = counts->coef[tx_size];
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const int16_t *scan, *nb;
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uint8_t token_cache[1024];
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const uint8_t *band_translate;
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switch (tx_size) {
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default:
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case TX_4X4:
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scan = get_scan_4x4(get_tx_type_4x4(type, xd, block_idx));
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above_ec = A[0] != 0;
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left_ec = L[0] != 0;
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band_translate = vp9_coefband_trans_4x4;
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break;
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case TX_8X8:
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scan = get_scan_8x8(get_tx_type_8x8(type, xd));
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above_ec = !!*(uint16_t *)A;
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left_ec = !!*(uint16_t *)L;
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band_translate = vp9_coefband_trans_8x8plus;
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break;
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case TX_16X16:
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scan = get_scan_16x16(get_tx_type_16x16(type, xd));
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above_ec = !!*(uint32_t *)A;
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left_ec = !!*(uint32_t *)L;
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band_translate = vp9_coefband_trans_8x8plus;
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break;
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case TX_32X32:
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scan = vp9_default_scan_32x32;
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above_ec = !!*(uint64_t *)A;
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left_ec = !!*(uint64_t *)L;
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band_translate = vp9_coefband_trans_8x8plus;
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break;
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}
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pt = combine_entropy_contexts(above_ec, left_ec);
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nb = vp9_get_coef_neighbors_handle(scan);
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while (1) {
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int val;
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const uint8_t *cat6 = cat6_prob;
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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 = get_coef_band(band_translate, c);
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prob = coef_probs[band][pt];
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counts->eob_branch[tx_size][type][ref][band][pt]++;
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if (!vp9_read(r, prob[EOB_CONTEXT_NODE]))
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break;
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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 = get_coef_band(band_translate, c);
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prob = coef_probs[band][pt];
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if (!vp9_read(r, prob[ZERO_CONTEXT_NODE])) {
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INCREMENT_COUNT(ZERO_TOKEN);
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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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// Load full probabilities if not already loaded
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if (!load_map[band][pt]) {
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vp9_model_to_full_probs(coef_probs[band][pt],
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coef_probs_full[band][pt]);
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load_map[band][pt] = 1;
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}
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prob = coef_probs_full[band][pt];
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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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while (*cat6) {
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val = (val << 1) | vp9_read(r, *cat6++);
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}
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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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coef_counts[type][ref][band][pt][DCT_EOB_MODEL_TOKEN]++;
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return c;
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}
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static int get_eob(struct segmentation *seg, int segment_id, int eob_max) {
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return vp9_segfeature_active(seg, segment_id, SEG_LVL_SKIP) ? 0 : eob_max;
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}
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struct decode_block_args {
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VP9D_COMP *pbi;
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vp9_reader *r;
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int *eobtotal;
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};
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static void decode_block(int plane, int block,
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BLOCK_SIZE_TYPE bsize,
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int ss_txfrm_size,
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void *argv) {
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const struct decode_block_args* const arg = argv;
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const int bw = b_width_log2(bsize);
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// find the maximum eob for this transform size, adjusted by segment
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MACROBLOCKD *xd = &arg->pbi->mb;
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struct macroblockd_plane* pd = &xd->plane[plane];
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const int segment_id = xd->mode_info_context->mbmi.segment_id;
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const TX_SIZE ss_tx_size = ss_txfrm_size / 2;
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const int seg_eob = get_eob(&xd->seg, segment_id, 16 << ss_txfrm_size);
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const int off = block >> ss_txfrm_size;
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const int mod = bw - ss_tx_size - pd->subsampling_x;
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const int aoff = (off & ((1 << mod) - 1)) << ss_tx_size;
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const int loff = (off >> mod) << ss_tx_size;
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const int tx_size_in_blocks = 1 << ss_tx_size;
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ENTROPY_CONTEXT *A = pd->above_context + aoff;
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ENTROPY_CONTEXT *L = pd->left_context + loff;
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const int eob = decode_coefs(&arg->pbi->common, xd, arg->r, block,
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pd->plane_type, seg_eob,
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BLOCK_OFFSET(pd->qcoeff, block),
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ss_tx_size, pd->dequant, A, L);
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if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) {
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set_contexts_on_border(xd, bsize, plane, tx_size_in_blocks, eob, aoff, loff,
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A, L);
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} else {
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int pt;
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for (pt = 0; pt < tx_size_in_blocks; pt++)
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A[pt] = L[pt] = eob > 0;
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}
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pd->eobs[block] = eob;
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*arg->eobtotal += eob;
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}
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int vp9_decode_tokens(VP9D_COMP *pbi, vp9_reader *r, BLOCK_SIZE_TYPE bsize) {
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int eobtotal = 0;
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struct decode_block_args args = {pbi, r, &eobtotal};
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foreach_transformed_block(&pbi->mb, bsize, decode_block, &args);
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return eobtotal;
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}
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