| /* |
| * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "vpx_mem/vpx_mem.h" |
| #include "vpx_ports/mem.h" |
| |
| #include "vp10/common/blockd.h" |
| #include "vp10/common/common.h" |
| #include "vp10/common/entropy.h" |
| #if CONFIG_COEFFICIENT_RANGE_CHECKING |
| #include "vp10/common/idct.h" |
| #endif |
| |
| #include "vp10/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 vpx_prob *probs, int n, vpx_reader *r) { |
| int i, val = 0; |
| for (i = 0; i < n; ++i) |
| val = (val << 1) | vpx_read(r, probs[i]); |
| return val; |
| } |
| |
| 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, |
| vpx_reader *r) { |
| 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); |
| int band, c = 0; |
| const vpx_prob (*coef_probs)[COEFF_CONTEXTS][UNCONSTRAINED_NODES] = |
| fc->coef_probs[tx_size][type][ref]; |
| const vpx_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_VP9_HIGHBITDEPTH |
| if (xd->bd > VPX_BITS_8) { |
| if (xd->bd == VPX_BITS_10) { |
| cat1_prob = vp10_cat1_prob_high10; |
| cat2_prob = vp10_cat2_prob_high10; |
| cat3_prob = vp10_cat3_prob_high10; |
| cat4_prob = vp10_cat4_prob_high10; |
| cat5_prob = vp10_cat5_prob_high10; |
| cat6_prob = vp10_cat6_prob_high10; |
| } else { |
| cat1_prob = vp10_cat1_prob_high12; |
| cat2_prob = vp10_cat2_prob_high12; |
| cat3_prob = vp10_cat3_prob_high12; |
| cat4_prob = vp10_cat4_prob_high12; |
| cat5_prob = vp10_cat5_prob_high12; |
| cat6_prob = vp10_cat6_prob_high12; |
| } |
| } else { |
| cat1_prob = vp10_cat1_prob; |
| cat2_prob = vp10_cat2_prob; |
| cat3_prob = vp10_cat3_prob; |
| cat4_prob = vp10_cat4_prob; |
| cat5_prob = vp10_cat5_prob; |
| cat6_prob = vp10_cat6_prob; |
| } |
| #else |
| cat1_prob = vp10_cat1_prob; |
| cat2_prob = vp10_cat2_prob; |
| cat3_prob = vp10_cat3_prob; |
| cat4_prob = vp10_cat4_prob; |
| cat5_prob = vp10_cat5_prob; |
| cat6_prob = vp10_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 (!vpx_read(r, prob[EOB_CONTEXT_NODE])) { |
| INCREMENT_COUNT(EOB_MODEL_TOKEN); |
| break; |
| } |
| |
| while (!vpx_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 (!vpx_read(r, prob[ONE_CONTEXT_NODE])) { |
| INCREMENT_COUNT(ONE_TOKEN); |
| token = ONE_TOKEN; |
| val = 1; |
| } else { |
| INCREMENT_COUNT(TWO_TOKEN); |
| token = vpx_read_tree(r, vp10_coef_con_tree, |
| vp10_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_VP9_HIGHBITDEPTH |
| switch (xd->bd) { |
| case VPX_BITS_8: |
| val = CAT6_MIN_VAL + read_coeff(cat6p, 14 - skip_bits, r); |
| break; |
| case VPX_BITS_10: |
| val = CAT6_MIN_VAL + read_coeff(cat6p, 16 - skip_bits, r); |
| break; |
| case VPX_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; |
| } |
| } |
| } |
| v = (val * dqv) >> dq_shift; |
| #if CONFIG_COEFFICIENT_RANGE_CHECKING |
| #if CONFIG_VP9_HIGHBITDEPTH |
| dqcoeff[scan[c]] = highbd_check_range((vpx_read_bit(r) ? -v : v), |
| xd->bd); |
| #else |
| dqcoeff[scan[c]] = check_range(vpx_read_bit(r) ? -v : v); |
| #endif // CONFIG_VP9_HIGHBITDEPTH |
| #else |
| dqcoeff[scan[c]] = vpx_read_bit(r) ? -v : v; |
| #endif // CONFIG_COEFFICIENT_RANGE_CHECKING |
| token_cache[scan[c]] = vp10_pt_energy_class[token]; |
| ++c; |
| ctx = get_coef_context(nb, token_cache, c); |
| dqv = dq[1]; |
| } |
| |
| return c; |
| } |
| |
| // TODO(slavarnway): Decode version of vp10_set_context. Modify vp10_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 vp10_decode_block_tokens(MACROBLOCKD *xd, |
| int plane, const scan_order *sc, |
| int x, int y, |
| TX_SIZE tx_size, vpx_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); |
| const int eob = decode_coefs(xd, pd->plane_type, |
| pd->dqcoeff, tx_size, |
| dequant, ctx, sc->scan, sc->neighbors, r); |
| dec_set_contexts(xd, pd, tx_size, eob > 0, x, y); |
| return eob; |
| } |
| |
| |
