| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| #include "aom_mem/aom_mem.h" |
| #include "aom_ports/mem.h" |
| |
| #include "av1/common/blockd.h" |
| #include "av1/common/common.h" |
| #include "av1/common/entropy.h" |
| #if CONFIG_COEFFICIENT_RANGE_CHECKING |
| #include "av1/common/idct.h" |
| #endif |
| |
| #include "av1/decoder/detokenize.h" |
| |
| #define EOB_CONTEXT_NODE 0 |
| #define ZERO_CONTEXT_NODE 1 |
| #define ONE_CONTEXT_NODE 2 |
| #define LOW_VAL_CONTEXT_NODE 0 |
| #define TWO_CONTEXT_NODE 1 |
| #define THREE_CONTEXT_NODE 2 |
| #define HIGH_LOW_CONTEXT_NODE 3 |
| #define CAT_ONE_CONTEXT_NODE 4 |
| #define CAT_THREEFOUR_CONTEXT_NODE 5 |
| #define CAT_THREE_CONTEXT_NODE 6 |
| #define CAT_FIVE_CONTEXT_NODE 7 |
| |
| #define INCREMENT_COUNT(token) \ |
| do { \ |
| if (counts) ++coef_counts[band][ctx][token]; \ |
| } while (0) |
| |
| static INLINE int read_coeff(const aom_prob *probs, int n, aom_reader *r) { |
| int i, val = 0; |
| for (i = 0; i < n; ++i) val = (val << 1) | aom_read(r, probs[i]); |
| return val; |
| } |
| |
| #if CONFIG_AOM_QM |
| static int decode_coefs(const MACROBLOCKD *xd, PLANE_TYPE type, |
| tran_low_t *dqcoeff, TX_SIZE tx_size, const int16_t *dq, |
| int ctx, const int16_t *scan, const int16_t *nb, |
| aom_reader *r, const qm_val_t *iqm[2][TX_SIZES]) |
| #else |
| static int decode_coefs(const MACROBLOCKD *xd, PLANE_TYPE type, |
| tran_low_t *dqcoeff, TX_SIZE tx_size, const int16_t *dq, |
| int ctx, const int16_t *scan, const int16_t *nb, |
| aom_reader *r) |
| #endif |
| { |
| FRAME_COUNTS *counts = xd->counts; |
| const int max_eob = 16 << (tx_size << 1); |
| const FRAME_CONTEXT *const fc = xd->fc; |
| const int ref = is_inter_block(&xd->mi[0]->mbmi); |
| #if CONFIG_AOM_QM |
| const qm_val_t *iqmatrix = iqm[!ref][tx_size]; |
| #endif |
| int band, c = 0; |
| const aom_prob(*coef_probs)[COEFF_CONTEXTS][UNCONSTRAINED_NODES] = |
| fc->coef_probs[tx_size][type][ref]; |
| const aom_prob *prob; |
| unsigned int(*coef_counts)[COEFF_CONTEXTS][UNCONSTRAINED_NODES + 1]; |
| unsigned int(*eob_branch_count)[COEFF_CONTEXTS]; |
| uint8_t token_cache[32 * 32]; |
| const uint8_t *band_translate = get_band_translate(tx_size); |
| const int dq_shift = (tx_size == TX_32X32); |
| int v, token; |
| int16_t dqv = dq[0]; |
| const uint8_t *cat1_prob; |
| const uint8_t *cat2_prob; |
| const uint8_t *cat3_prob; |
| const uint8_t *cat4_prob; |
| const uint8_t *cat5_prob; |
| const uint8_t *cat6_prob; |
| |
| if (counts) { |
| coef_counts = counts->coef[tx_size][type][ref]; |
| eob_branch_count = counts->eob_branch[tx_size][type][ref]; |
| } |
| |
| #if CONFIG_AOM_HIGHBITDEPTH |
| if (xd->bd > AOM_BITS_8) { |
| if (xd->bd == AOM_BITS_10) { |
| cat1_prob = av1_cat1_prob_high10; |
| cat2_prob = av1_cat2_prob_high10; |
| cat3_prob = av1_cat3_prob_high10; |
| cat4_prob = av1_cat4_prob_high10; |
| cat5_prob = av1_cat5_prob_high10; |
| cat6_prob = av1_cat6_prob_high10; |
| } else { |
| cat1_prob = av1_cat1_prob_high12; |
| cat2_prob = av1_cat2_prob_high12; |
| cat3_prob = av1_cat3_prob_high12; |
| cat4_prob = av1_cat4_prob_high12; |
| cat5_prob = av1_cat5_prob_high12; |
| cat6_prob = av1_cat6_prob_high12; |
| } |
| } else { |
| cat1_prob = av1_cat1_prob; |
| cat2_prob = av1_cat2_prob; |
| cat3_prob = av1_cat3_prob; |
| cat4_prob = av1_cat4_prob; |
| cat5_prob = av1_cat5_prob; |
| cat6_prob = av1_cat6_prob; |
| } |
| #else |
| cat1_prob = av1_cat1_prob; |
| cat2_prob = av1_cat2_prob; |
| cat3_prob = av1_cat3_prob; |
| cat4_prob = av1_cat4_prob; |
| cat5_prob = av1_cat5_prob; |
| cat6_prob = av1_cat6_prob; |
| #endif |
| |
| while (c < max_eob) { |
| int val = -1; |
| band = *band_translate++; |
| prob = coef_probs[band][ctx]; |
| if (counts) ++eob_branch_count[band][ctx]; |
| if (!aom_read(r, prob[EOB_CONTEXT_NODE])) { |
| INCREMENT_COUNT(EOB_MODEL_TOKEN); |
| break; |
| } |
| |
| while (!aom_read(r, prob[ZERO_CONTEXT_NODE])) { |
| INCREMENT_COUNT(ZERO_TOKEN); |
| dqv = dq[1]; |
| token_cache[scan[c]] = 0; |
| ++c; |
| if (c >= max_eob) return c; // zero tokens at the end (no eob token) |
| ctx = get_coef_context(nb, token_cache, c); |
| band = *band_translate++; |
| prob = coef_probs[band][ctx]; |
| } |
| |
| if (!aom_read(r, prob[ONE_CONTEXT_NODE])) { |
| INCREMENT_COUNT(ONE_TOKEN); |
| token = ONE_TOKEN; |
| val = 1; |
| } else { |
| INCREMENT_COUNT(TWO_TOKEN); |
| token = aom_read_tree(r, av1_coef_con_tree, |
| av1_pareto8_full[prob[PIVOT_NODE] - 1]); |
| switch (token) { |
| case TWO_TOKEN: |
| case THREE_TOKEN: |
| case FOUR_TOKEN: val = token; break; |
| case CATEGORY1_TOKEN: |
| val = CAT1_MIN_VAL + read_coeff(cat1_prob, 1, r); |
| break; |
| case CATEGORY2_TOKEN: |
| val = CAT2_MIN_VAL + read_coeff(cat2_prob, 2, r); |
| break; |
| case CATEGORY3_TOKEN: |
| val = CAT3_MIN_VAL + read_coeff(cat3_prob, 3, r); |
| break; |
| case CATEGORY4_TOKEN: |
| val = CAT4_MIN_VAL + read_coeff(cat4_prob, 4, r); |
| break; |
| case CATEGORY5_TOKEN: |
| val = CAT5_MIN_VAL + read_coeff(cat5_prob, 5, r); |
| break; |
| case CATEGORY6_TOKEN: { |
| #if CONFIG_MISC_FIXES |
| const int skip_bits = TX_SIZES - 1 - tx_size; |
| #else |
| const int skip_bits = 0; |
| #endif |
| const uint8_t *cat6p = cat6_prob + skip_bits; |
| #if CONFIG_AOM_HIGHBITDEPTH |
| switch (xd->bd) { |
| case AOM_BITS_8: |
| val = CAT6_MIN_VAL + read_coeff(cat6p, 14 - skip_bits, r); |
| break; |
| case AOM_BITS_10: |
| val = CAT6_MIN_VAL + read_coeff(cat6p, 16 - skip_bits, r); |
| break; |
| case AOM_BITS_12: |
| val = CAT6_MIN_VAL + read_coeff(cat6p, 18 - skip_bits, r); |
| break; |
| default: assert(0); return -1; |
| } |
| #else |
| val = CAT6_MIN_VAL + read_coeff(cat6p, 14 - skip_bits, r); |
| #endif |
| break; |
| } |
| } |
| } |
| #if CONFIG_AOM_QM |
| dqv = ((iqmatrix[scan[c]] * (int)dqv) + (1 << (AOM_QM_BITS - 1))) >> |
| AOM_QM_BITS; |
| #endif |
| v = (val * dqv) >> dq_shift; |
| #if CONFIG_COEFFICIENT_RANGE_CHECKING |
| #if CONFIG_AOM_HIGHBITDEPTH |
| dqcoeff[scan[c]] = highbd_check_range((aom_read_bit(r) ? -v : v), xd->bd); |
| #else |
| dqcoeff[scan[c]] = check_range(aom_read_bit(r) ? -v : v); |
| #endif // CONFIG_AOM_HIGHBITDEPTH |
| #else |
| dqcoeff[scan[c]] = aom_read_bit(r) ? -v : v; |
| #endif // CONFIG_COEFFICIENT_RANGE_CHECKING |
| token_cache[scan[c]] = av1_pt_energy_class[token]; |
| ++c; |
| ctx = get_coef_context(nb, token_cache, c); |
| dqv = dq[1]; |
| } |
| |
| return c; |
| } |
| |
| // TODO(slavarnway): Decode version of av1_set_context. Modify |
| // av1_set_context |
| // after testing is complete, then delete this version. |
| static void dec_set_contexts(const MACROBLOCKD *xd, |
| struct macroblockd_plane *pd, TX_SIZE tx_size, |
| int has_eob, int aoff, int loff) { |
| ENTROPY_CONTEXT *const a = pd->above_context + aoff; |
| ENTROPY_CONTEXT *const l = pd->left_context + loff; |
| const int tx_size_in_blocks = 1 << tx_size; |
| |
| // above |
| if (has_eob && xd->mb_to_right_edge < 0) { |
| int i; |
| const int blocks_wide = |
| pd->n4_w + (xd->mb_to_right_edge >> (5 + pd->subsampling_x)); |
| int above_contexts = tx_size_in_blocks; |
| if (above_contexts + aoff > blocks_wide) |
| above_contexts = blocks_wide - aoff; |
| |
| for (i = 0; i < above_contexts; ++i) a[i] = has_eob; |
| for (i = above_contexts; i < tx_size_in_blocks; ++i) a[i] = 0; |
| } else { |
| memset(a, has_eob, sizeof(ENTROPY_CONTEXT) * tx_size_in_blocks); |
| } |
| |
| // left |
| if (has_eob && xd->mb_to_bottom_edge < 0) { |
| int i; |
| const int blocks_high = |
| pd->n4_h + (xd->mb_to_bottom_edge >> (5 + pd->subsampling_y)); |
| int left_contexts = tx_size_in_blocks; |
| if (left_contexts + loff > blocks_high) left_contexts = blocks_high - loff; |
| |
| for (i = 0; i < left_contexts; ++i) l[i] = has_eob; |
| for (i = left_contexts; i < tx_size_in_blocks; ++i) l[i] = 0; |
| } else { |
| memset(l, has_eob, sizeof(ENTROPY_CONTEXT) * tx_size_in_blocks); |
| } |
| } |
| |
| int av1_decode_block_tokens(MACROBLOCKD *xd, int plane, const scan_order *sc, |
| int x, int y, TX_SIZE tx_size, aom_reader *r, |
| int seg_id) { |
| struct macroblockd_plane *const pd = &xd->plane[plane]; |
| const int16_t *const dequant = pd->seg_dequant[seg_id]; |
| const int ctx = |
| get_entropy_context(tx_size, pd->above_context + x, pd->left_context + y); |
| #if CONFIG_AOM_QM |
| const int eob = |
| decode_coefs(xd, pd->plane_type, pd->dqcoeff, tx_size, dequant, ctx, |
| sc->scan, sc->neighbors, r, pd->seg_iqmatrix[seg_id]); |
| #else |
| const int eob = decode_coefs(xd, pd->plane_type, pd->dqcoeff, tx_size, |
| dequant, ctx, sc->scan, sc->neighbors, r); |
| #endif |
| dec_set_contexts(xd, pd, tx_size, eob > 0, x, y); |
| return eob; |
| } |
| |
| |
