| /* |
| * 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 "vp9/common/vp9_blockd.h" |
| #include "vp9/common/vp9_common.h" |
| #include "vp9/common/vp9_seg_common.h" |
| |
| #include "vp9/decoder/vp9_dboolhuff.h" |
| #include "vp9/decoder/vp9_detokenize.h" |
| #include "vp9/decoder/vp9_onyxd_int.h" |
| #include "vp9/decoder/vp9_treereader.h" |
| |
| #define EOB_CONTEXT_NODE 0 |
| #define ZERO_CONTEXT_NODE 1 |
| #define ONE_CONTEXT_NODE 2 |
| #define LOW_VAL_CONTEXT_NODE 3 |
| #define TWO_CONTEXT_NODE 4 |
| #define THREE_CONTEXT_NODE 5 |
| #define HIGH_LOW_CONTEXT_NODE 6 |
| #define CAT_ONE_CONTEXT_NODE 7 |
| #define CAT_THREEFOUR_CONTEXT_NODE 8 |
| #define CAT_THREE_CONTEXT_NODE 9 |
| #define CAT_FIVE_CONTEXT_NODE 10 |
| |
| #define CAT1_MIN_VAL 5 |
| #define CAT2_MIN_VAL 7 |
| #define CAT3_MIN_VAL 11 |
| #define CAT4_MIN_VAL 19 |
| #define CAT5_MIN_VAL 35 |
| #define CAT6_MIN_VAL 67 |
| #define CAT1_PROB0 159 |
| #define CAT2_PROB0 145 |
| #define CAT2_PROB1 165 |
| |
| #define CAT3_PROB0 140 |
| #define CAT3_PROB1 148 |
| #define CAT3_PROB2 173 |
| |
| #define CAT4_PROB0 135 |
| #define CAT4_PROB1 140 |
| #define CAT4_PROB2 155 |
| #define CAT4_PROB3 176 |
| |
| #define CAT5_PROB0 130 |
| #define CAT5_PROB1 134 |
| #define CAT5_PROB2 141 |
| #define CAT5_PROB3 157 |
| #define CAT5_PROB4 180 |
| |
| static const vp9_prob cat6_prob[15] = { |
| 254, 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0 |
| }; |
| |
| #define INCREMENT_COUNT(token) \ |
| do { \ |
| coef_counts[type][ref][band][pt] \ |
| [token >= TWO_TOKEN ? \ |
| (token == DCT_EOB_TOKEN ? DCT_EOB_MODEL_TOKEN : TWO_TOKEN) : \ |
| token]++; \ |
| token_cache[scan[c]] = vp9_pt_energy_class[token]; \ |
| } while (0) |
| |
| #define WRITE_COEF_CONTINUE(val, token) \ |
| { \ |
| qcoeff_ptr[scan[c]] = vp9_read_and_apply_sign(r, val) * \ |
| dq[c > 0] / (1 + (tx_size == TX_32X32)); \ |
| INCREMENT_COUNT(token); \ |
| c++; \ |
| continue; \ |
| } |
| |
| #define ADJUST_COEF(prob, bits_count) \ |
| do { \ |
| if (vp9_read(r, prob)) \ |
| val += 1 << bits_count; \ |
| } while (0); |
| |
| static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd, |
| vp9_reader *r, int block_idx, |
| PLANE_TYPE type, int seg_eob, int16_t *qcoeff_ptr, |
| TX_SIZE tx_size, const int16_t *dq, int pt) { |
| const FRAME_CONTEXT *const fc = &cm->fc; |
| FRAME_COUNTS *const counts = &cm->counts; |
| const int ref = is_inter_block(&xd->mi_8x8[0]->mbmi); |
| int band, c = 0; |
| const vp9_prob (*coef_probs)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES] = |
| fc->coef_probs[tx_size][type][ref]; |
| vp9_prob coef_probs_full[COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES]; |
| uint8_t load_map[COEF_BANDS][PREV_COEF_CONTEXTS] = { { 0 } }; |
| const vp9_prob *prob; |
| vp9_coeff_count_model *coef_counts = counts->coef[tx_size]; |
| const int16_t *scan, *nb; |
| const uint8_t *const band_translate = get_band_translate(tx_size); |
| uint8_t token_cache[1024]; |
| get_scan(xd, tx_size, type, block_idx, &scan, &nb); |
| |
| while (1) { |
| int val; |
| const uint8_t *cat6 = cat6_prob; |
| if (c >= seg_eob) |
| break; |
| if (c) |
| pt = get_coef_context(nb, token_cache, c); |
| band = get_coef_band(band_translate, c); |
| prob = coef_probs[band][pt]; |
| if (!cm->frame_parallel_decoding_mode) |
| ++counts->eob_branch[tx_size][type][ref][band][pt]; |
| if (!vp9_read(r, prob[EOB_CONTEXT_NODE])) |
| break; |
| |
| SKIP_START: |
| if (c >= seg_eob) |
| break; |
| if (c) |
| pt = get_coef_context(nb, token_cache, c); |
| band = get_coef_band(band_translate, c); |
| prob = coef_probs[band][pt]; |
| |
| if (!vp9_read(r, prob[ZERO_CONTEXT_NODE])) { |
| INCREMENT_COUNT(ZERO_TOKEN); |
| ++c; |
| goto SKIP_START; |
| } |
| |
| // ONE_CONTEXT_NODE_0_ |
| if (!vp9_read(r, prob[ONE_CONTEXT_NODE])) { |
| WRITE_COEF_CONTINUE(1, ONE_TOKEN); |
| } |
| // Load full probabilities if not already loaded |
| if (!load_map[band][pt]) { |
| vp9_model_to_full_probs(coef_probs[band][pt], |
| coef_probs_full[band][pt]); |
| load_map[band][pt] = 1; |
| } |
| prob = coef_probs_full[band][pt]; |
| // LOW_VAL_CONTEXT_NODE_0_ |
| if (!vp9_read(r, prob[LOW_VAL_CONTEXT_NODE])) { |
| if (!vp9_read(r, prob[TWO_CONTEXT_NODE])) { |
| WRITE_COEF_CONTINUE(2, TWO_TOKEN); |
| } |
| if (!vp9_read(r, prob[THREE_CONTEXT_NODE])) { |
| WRITE_COEF_CONTINUE(3, THREE_TOKEN); |
| } |
| WRITE_COEF_CONTINUE(4, FOUR_TOKEN); |
| } |
| // HIGH_LOW_CONTEXT_NODE_0_ |
| if (!vp9_read(r, prob[HIGH_LOW_CONTEXT_NODE])) { |
| if (!vp9_read(r, prob[CAT_ONE_CONTEXT_NODE])) { |
| val = CAT1_MIN_VAL; |
| ADJUST_COEF(CAT1_PROB0, 0); |
| WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY1); |
| } |
| val = CAT2_MIN_VAL; |
| ADJUST_COEF(CAT2_PROB1, 1); |
| ADJUST_COEF(CAT2_PROB0, 0); |
| WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY2); |
| } |
| // CAT_THREEFOUR_CONTEXT_NODE_0_ |
| if (!vp9_read(r, prob[CAT_THREEFOUR_CONTEXT_NODE])) { |
| if (!vp9_read(r, prob[CAT_THREE_CONTEXT_NODE])) { |
| val = CAT3_MIN_VAL; |
| ADJUST_COEF(CAT3_PROB2, 2); |
| ADJUST_COEF(CAT3_PROB1, 1); |
| ADJUST_COEF(CAT3_PROB0, 0); |
| WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY3); |
| } |
| val = CAT4_MIN_VAL; |
| ADJUST_COEF(CAT4_PROB3, 3); |
| ADJUST_COEF(CAT4_PROB2, 2); |
| ADJUST_COEF(CAT4_PROB1, 1); |
| ADJUST_COEF(CAT4_PROB0, 0); |
| WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY4); |
| } |
| // CAT_FIVE_CONTEXT_NODE_0_: |
| if (!vp9_read(r, prob[CAT_FIVE_CONTEXT_NODE])) { |
| val = CAT5_MIN_VAL; |
| ADJUST_COEF(CAT5_PROB4, 4); |
| ADJUST_COEF(CAT5_PROB3, 3); |
| ADJUST_COEF(CAT5_PROB2, 2); |
| ADJUST_COEF(CAT5_PROB1, 1); |
| ADJUST_COEF(CAT5_PROB0, 0); |
| WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY5); |
| } |
| val = 0; |
| while (*cat6) { |
| val = (val << 1) | vp9_read(r, *cat6++); |
| } |
| val += CAT6_MIN_VAL; |
| WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY6); |
| } |
| |
| if (c < seg_eob) { |
| if (!cm->frame_parallel_decoding_mode) |
| ++coef_counts[type][ref][band][pt][DCT_EOB_MODEL_TOKEN]; |
| } |
| |
| return c; |
| } |
| |
| struct decode_block_args { |
| VP9D_COMP *pbi; |
| vp9_reader *r; |
| int *eobtotal; |
| }; |
| |
| static void decode_block(int plane, int block, BLOCK_SIZE plane_bsize, |
| TX_SIZE tx_size, void *argv) { |
| const struct decode_block_args* const arg = argv; |
| |
| // find the maximum eob for this transform size, adjusted by segment |
| MACROBLOCKD *xd = &arg->pbi->mb; |
| struct segmentation *seg = &arg->pbi->common.seg; |
| struct macroblockd_plane* pd = &xd->plane[plane]; |
| const int segment_id = xd->mi_8x8[0]->mbmi.segment_id; |
| const int seg_eob = get_tx_eob(seg, segment_id, tx_size); |
| int aoff, loff, eob, pt; |
| |
| txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &aoff, &loff); |
| pt = get_entropy_context(tx_size, pd->above_context + aoff, |
| pd->left_context + loff); |
| |
| eob = decode_coefs(&arg->pbi->common, xd, arg->r, block, |
| pd->plane_type, seg_eob, BLOCK_OFFSET(pd->qcoeff, block), |
| tx_size, pd->dequant, pt); |
| |
| set_contexts(xd, pd, plane_bsize, tx_size, eob > 0, aoff, loff); |
| |
| pd->eobs[block] = eob; |
| *arg->eobtotal += eob; |
| } |
| |
| int vp9_decode_tokens(VP9D_COMP *pbi, vp9_reader *r, BLOCK_SIZE bsize) { |
| int eobtotal = 0; |
| struct decode_block_args args = {pbi, r, &eobtotal}; |
| foreach_transformed_block(&pbi->mb, bsize, decode_block, &args); |
| return eobtotal; |
| } |
