| /* |
| * 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. |
| */ |
| |
| #ifndef AV1_COMMON_SCAN_H_ |
| #define AV1_COMMON_SCAN_H_ |
| |
| #include "aom/aom_integer.h" |
| #include "aom_ports/mem.h" |
| |
| #include "av1/common/enums.h" |
| #include "av1/common/onyxc_int.h" |
| #include "av1/common/blockd.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define MAX_NEIGHBORS 2 |
| |
| extern const SCAN_ORDER av1_default_scan_orders[TX_SIZES]; |
| extern const SCAN_ORDER av1_intra_scan_orders[TX_SIZES_ALL][TX_TYPES]; |
| extern const SCAN_ORDER av1_inter_scan_orders[TX_SIZES_ALL][TX_TYPES]; |
| |
| #if CONFIG_ADAPT_SCAN |
| #define USE_2X2_PROB 1 |
| #define USE_TOPOLOGICAL_SORT 0 |
| #define USE_LIMIT_SCAN_DISTANCE 0 |
| void av1_update_scan_count_facade(AV1_COMMON *cm, FRAME_COUNTS *counts, |
| TX_SIZE tx_size, TX_TYPE tx_type, |
| const tran_low_t *dqcoeffs, int max_scan); |
| |
| // embed r + c and coeff_idx info with nonzero probabilities. When sorting the |
| // nonzero probabilities, if there is a tie, the coefficient with smaller r + c |
| // will be scanned first |
| void av1_augment_prob(TX_SIZE tx_size, TX_TYPE tx_type, uint32_t *prob); |
| |
| #if USE_TOPOLOGICAL_SORT |
| // apply quick sort on nonzero probabilities to obtain a sort order |
| void av1_update_sort_order(TX_SIZE tx_size, TX_TYPE tx_type, |
| const uint32_t *non_zero_prob, int16_t *sort_order); |
| |
| // apply topological sort on the nonzero probabilities sorting order to |
| // guarantee each to-be-scanned coefficient's upper and left coefficient will be |
| // scanned before the to-be-scanned coefficient. |
| void av1_update_scan_order(TX_SIZE tx_size, int16_t *sort_order, int16_t *scan, |
| int16_t *iscan); |
| #else // USE_TOPOLOGICAL_SORT |
| void av1_update_scan_order(TX_SIZE tx_size, TX_TYPE tx_type, |
| uint32_t *non_zero_prob, int16_t *scan, |
| int16_t *iscan); |
| #endif // USE_TOPOLOGICAL_SORT |
| |
| // For each coeff_idx in scan[], update its above and left neighbors in |
| // neighbors[] accordingly. |
| void av1_update_neighbors(TX_SIZE tx_size, const int16_t *scan, |
| const int16_t *iscan, int16_t *neighbors); |
| void av1_init_scan_order(AV1_COMMON *cm); |
| void av1_adapt_scan_order(AV1_COMMON *cm); |
| #if USE_2X2_PROB |
| void av1_down_sample_scan_count(uint32_t *non_zero_count_ds, |
| const uint32_t *non_zero_count, |
| TX_SIZE tx_size); |
| #endif // USE_2X2_PROB |
| #endif // CONFIG_ADAPT_SCAN |
| void av1_deliver_eob_threshold(const AV1_COMMON *cm, MACROBLOCKD *xd); |
| |
| static INLINE int get_coef_context(const int16_t *neighbors, |
| const uint8_t *token_cache, int c) { |
| return (1 + token_cache[neighbors[MAX_NEIGHBORS * c + 0]] + |
| token_cache[neighbors[MAX_NEIGHBORS * c + 1]]) >> |
| 1; |
| } |
| |
| static INLINE const SCAN_ORDER *get_default_scan(TX_SIZE tx_size, |
| TX_TYPE tx_type, |
| int is_inter) { |
| return is_inter ? &av1_inter_scan_orders[tx_size][tx_type] |
| : &av1_intra_scan_orders[tx_size][tx_type]; |
| } |
| |
| static INLINE int do_adapt_scan(TX_SIZE tx_size, TX_TYPE tx_type) { |
| (void)tx_size; |
| #if CONFIG_EXT_TX |
| if (tx_size_2d[tx_size] >= 1024 && tx_type != DCT_DCT) return 0; |
| return tx_type < IDTX; |
| #else |
| (void)tx_type; |
| return 1; |
| #endif |
| } |
| |
| static INLINE const SCAN_ORDER *get_scan(const AV1_COMMON *cm, TX_SIZE tx_size, |
| TX_TYPE tx_type, |
| const MB_MODE_INFO *mbmi) { |
| #if CONFIG_MRC_TX |
| // use the DCT_DCT scan order for MRC_DCT for now |
| if (tx_type == MRC_DCT) tx_type = DCT_DCT; |
| #endif // CONFIG_MRC_TX |
| #if CONFIG_LGT_FROM_PRED |
| if (mbmi->use_lgt) tx_type = DCT_DCT; |
| #endif |
| const int is_inter = is_inter_block(mbmi); |
| #if CONFIG_ADAPT_SCAN |
| (void)mbmi; |
| (void)is_inter; |
| #if CONFIG_EXT_TX |
| if (!do_adapt_scan(tx_size, tx_type)) |
| return get_default_scan(tx_size, tx_type, is_inter); |
| else |
| #endif // CONFIG_EXT_TX |
| return &cm->fc->sc[tx_size][tx_type]; |
| #else // CONFIG_ADAPT_SCAN |
| (void)cm; |
| return get_default_scan(tx_size, tx_type, is_inter); |
| #endif // CONFIG_ADAPT_SCAN |
| } |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AV1_COMMON_SCAN_H_ |