| /* |
| * 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 AOM_AV1_ENCODER_RDOPT_H_ |
| #define AOM_AV1_ENCODER_RDOPT_H_ |
| |
| #include <stdbool.h> |
| |
| #include "av1/common/blockd.h" |
| #include "av1/common/txb_common.h" |
| |
| #include "av1/encoder/block.h" |
| #include "av1/encoder/context_tree.h" |
| #include "av1/encoder/encoder.h" |
| #include "av1/encoder/encodetxb.h" |
| #include "av1/encoder/rdopt_utils.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define COMP_TYPE_RD_THRESH_SCALE 11 |
| #define COMP_TYPE_RD_THRESH_SHIFT 4 |
| #define MAX_WINNER_MOTION_MODES 10 |
| |
| struct TileInfo; |
| struct macroblock; |
| struct RD_STATS; |
| |
| /*!\brief AV1 intra mode selection for intra frames. |
| * |
| * \ingroup intra_mode_search |
| * \callgraph |
| * Top level function for rd-based intra mode selection during intra frame |
| * encoding. This function will first search for the best luma prediction by |
| * calling av1_rd_pick_intra_sby_mode, then it searches for chroma prediction |
| * with av1_rd_pick_intra_sbuv_mode. If applicable, this function ends the |
| * search with an evaluation for intrabc. |
| * |
| * \param[in] cpi Top-level encoder structure. |
| * \param[in] x Pointer to structure holding all the data for |
| the current macroblock. |
| * \param[in] rd_cost Struct to keep track of the RD information. |
| * \param[in] bsize Current block size. |
| * \param[in] ctx Structure to hold snapshot of coding context |
| during the mode picking process. |
| * \param[in] best_rd Best RD seen for this block so far. |
| * |
| * \remark Nothing is returned. Instead, the MB_MODE_INFO struct inside x |
| * is modified to store information about the best mode computed |
| * in this function. The rd_cost struct is also updated with the RD stats |
| * corresponding to the best mode found. |
| */ |
| void av1_rd_pick_intra_mode_sb(const struct AV1_COMP *cpi, struct macroblock *x, |
| struct RD_STATS *rd_cost, BLOCK_SIZE bsize, |
| PICK_MODE_CONTEXT *ctx, int64_t best_rd); |
| |
| /*!\brief AV1 inter mode selection. |
| * |
| * \ingroup inter_mode_search |
| * \callgraph |
| * Top level function for inter mode selection. This function will loop over |
| * all possible inter modes and select the best one for the current block by |
| * computing the RD cost. The mode search and RD are computed in |
| * handle_inter_mode(), which is called from this function within the main |
| * loop. |
| * |
| * \param[in] cpi Top-level encoder structure |
| * \param[in] tile_data Pointer to struct holding adaptive |
| data/contexts/models for the tile during |
| encoding |
| * \param[in] x Pointer to structure holding all the data for |
| the current macroblock |
| * \param[in] rd_cost Struct to keep track of the RD information |
| * \param[in] bsize Current block size |
| * \param[in] ctx Structure to hold snapshot of coding context |
| during the mode picking process |
| * \param[in] best_rd_so_far Best RD seen for this block so far |
| * |
| * \remark Nothing is returned. Instead, the MB_MODE_INFO struct inside x |
| * is modified to store information about the best mode computed |
| * in this function. The rd_cost struct is also updated with the RD stats |
| * corresponding to the best mode found. |
| */ |
| void av1_rd_pick_inter_mode(struct AV1_COMP *cpi, struct TileDataEnc *tile_data, |
| struct macroblock *x, struct RD_STATS *rd_cost, |
| BLOCK_SIZE bsize, PICK_MODE_CONTEXT *ctx, |
| int64_t best_rd_so_far); |
| |
| /*!\brief AV1 intra mode selection based on Non-RD optimized model. |
| * |
| * \ingroup nonrd_mode_search |
| * \callgraph |
| * \callergraph |
| * Top level function for Non-RD optimized intra mode selection. |
| * This finction will loop over subset of intra modes and select the best one |
| * based on calculated modelled RD cost. Only 4 intra modes are checked as |
| * specified in \c intra_mode_list. When calculating RD cost Hadamard transform |
| * of residual is used to calculate rate. Estmation of RD cost is performed |
| * in \c estimate_block_intra which is called from this function |
| * |
| * \param[in] cpi Top-level encoder structure |
| * \param[in] x Pointer to structure holding all the data for |
| the current macroblock |
| * \param[in] rd_cost Struct to keep track of the RD information |
| * \param[in] bsize Current block size |
| * \param[in] ctx Structure to hold snapshot of coding context |
| during the mode picking process |
| * |
| * \remark Nothing is returned. Instead, the MB_MODE_INFO struct inside x |
| * is modified to store information about the best mode computed |
| * in this function. The rd_cost struct is also updated with the RD stats |
| * corresponding to the best mode found. |
| */ |
| void av1_nonrd_pick_intra_mode(AV1_COMP *cpi, MACROBLOCK *x, RD_STATS *rd_cost, |
| BLOCK_SIZE bsize, PICK_MODE_CONTEXT *ctx); |
| |
| /*!\brief AV1 inter mode selection based on Non-RD optimized model. |
| * |
| * \ingroup nonrd_mode_search |
| * \callgraph |
| * Top level function for Non-RD optimized inter mode selection. |
| * This finction will loop over subset of inter modes and select the best one |
| * based on calculated modelled RD cost. While making decisions which modes to |
| * check, this function applies heuristics based on previously checked modes, |
| * block residual variance, block size, and other factors to prune certain |
| * modes and reference frames. Currently only single reference frame modes |
| * are checked. Additional heuristics are applied to decide if intra modes |
| * need to be checked. |
| * * |
| * \param[in] cpi Top-level encoder structure |
| * \param[in] tile_data Pointer to struct holding adaptive |
| data/contexts/models for the tile during |
| encoding |
| * \param[in] x Pointer to structure holding all the data for |
| the current macroblock |
| * \param[in] rd_cost Struct to keep track of the RD information |
| * \param[in] bsize Current block size |
| * \param[in] ctx Structure to hold snapshot of coding context |
| during the mode picking process |
| * |
| * \remark Nothing is returned. Instead, the MB_MODE_INFO struct inside x |
| * is modified to store information about the best mode computed |
| * in this function. The rd_cost struct is also updated with the RD stats |
| * corresponding to the best mode found. |
| */ |
| void av1_nonrd_pick_inter_mode_sb(struct AV1_COMP *cpi, |
| struct TileDataEnc *tile_data, |
| struct macroblock *x, |
| struct RD_STATS *rd_cost, BLOCK_SIZE bsize, |
| PICK_MODE_CONTEXT *ctx); |
| |
| void av1_rd_pick_inter_mode_sb_seg_skip( |
| const struct AV1_COMP *cpi, struct TileDataEnc *tile_data, |
| struct macroblock *x, int mi_row, int mi_col, struct RD_STATS *rd_cost, |
| BLOCK_SIZE bsize, PICK_MODE_CONTEXT *ctx, int64_t best_rd_so_far); |
| |
| void av1_inter_mode_data_init(struct TileDataEnc *tile_data); |
| void av1_inter_mode_data_fit(TileDataEnc *tile_data, int rdmult); |
| |
| static INLINE int coded_to_superres_mi(int mi_col, int denom) { |
| return (mi_col * denom + SCALE_NUMERATOR / 2) / SCALE_NUMERATOR; |
| } |
| |
| static INLINE int av1_encoder_get_relative_dist(int a, int b) { |
| assert(a >= 0 && b >= 0); |
| return (a - b); |
| } |
| |
| // This function will return number of mi's in a superblock. |
| static INLINE int av1_get_sb_mi_size(const AV1_COMMON *const cm) { |
| const int mi_alloc_size_1d = mi_size_wide[cm->mi_params.mi_alloc_bsize]; |
| int sb_mi_rows = |
| (mi_size_wide[cm->seq_params->sb_size] + mi_alloc_size_1d - 1) / |
| mi_alloc_size_1d; |
| assert(mi_size_wide[cm->seq_params->sb_size] == |
| mi_size_high[cm->seq_params->sb_size]); |
| int sb_mi_size = sb_mi_rows * sb_mi_rows; |
| |
| return sb_mi_size; |
| } |
| |
| // This function prunes the mode if either of the reference frame falls in the |
| // pruning list |
| static INLINE int prune_ref(const MV_REFERENCE_FRAME *const ref_frame, |
| const unsigned int *const ref_display_order_hint, |
| const unsigned int frame_display_order_hint, |
| const int *ref_frame_list) { |
| for (int i = 0; i < 2; i++) { |
| if (ref_frame_list[i] == NONE_FRAME) continue; |
| |
| if (ref_frame[0] == ref_frame_list[i] || |
| ref_frame[1] == ref_frame_list[i]) { |
| if (av1_encoder_get_relative_dist( |
| ref_display_order_hint[ref_frame_list[i] - LAST_FRAME], |
| frame_display_order_hint) < 0) |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| static INLINE int has_closest_ref_frames(const MV_REFERENCE_FRAME *ref_frame, |
| int8_t closest_past_ref, |
| int8_t closest_future_ref) { |
| int has_closest_past_ref = |
| (ref_frame[0] == closest_past_ref) || (ref_frame[1] == closest_past_ref); |
| int has_closest_future_ref = (ref_frame[0] == closest_future_ref) || |
| (ref_frame[1] == closest_future_ref); |
| return (has_closest_past_ref && has_closest_future_ref); |
| } |
| |
| static INLINE int has_best_pred_mv_sad(const MV_REFERENCE_FRAME *ref_frame, |
| const MACROBLOCK *const x) { |
| int has_best_past_pred_mv_sad = 0; |
| int has_best_future_pred_mv_sad = 0; |
| if (x->best_pred_mv_sad[0] < INT_MAX && x->best_pred_mv_sad[1] < INT_MAX) { |
| has_best_past_pred_mv_sad = |
| (x->pred_mv_sad[ref_frame[0]] == x->best_pred_mv_sad[0]) || |
| (x->pred_mv_sad[ref_frame[1]] == x->best_pred_mv_sad[0]); |
| has_best_future_pred_mv_sad = |
| (x->pred_mv_sad[ref_frame[0]] == x->best_pred_mv_sad[1]) || |
| (x->pred_mv_sad[ref_frame[1]] == x->best_pred_mv_sad[1]); |
| } |
| return (has_best_past_pred_mv_sad && has_best_future_pred_mv_sad); |
| } |
| |
| static INLINE int prune_ref_by_selective_ref_frame( |
| const AV1_COMP *const cpi, const MACROBLOCK *const x, |
| const MV_REFERENCE_FRAME *const ref_frame, |
| const unsigned int *const ref_display_order_hint) { |
| const SPEED_FEATURES *const sf = &cpi->sf; |
| if (!sf->inter_sf.selective_ref_frame) return 0; |
| |
| const int comp_pred = ref_frame[1] > INTRA_FRAME; |
| |
| if (sf->inter_sf.selective_ref_frame >= 2 || |
| (sf->inter_sf.selective_ref_frame == 1 && comp_pred)) { |
| int ref_frame_list[2] = { LAST3_FRAME, LAST2_FRAME }; |
| |
| if (x != NULL) { |
| // Disable pruning if either tpl suggests that we keep the frame or |
| // the pred_mv gives us the best sad |
| if (x->tpl_keep_ref_frame[LAST3_FRAME] || |
| x->pred_mv_sad[LAST3_FRAME] == x->best_pred_mv_sad[0]) { |
| ref_frame_list[0] = NONE_FRAME; |
| } |
| if (x->tpl_keep_ref_frame[LAST2_FRAME] || |
| x->pred_mv_sad[LAST2_FRAME] == x->best_pred_mv_sad[0]) { |
| ref_frame_list[1] = NONE_FRAME; |
| } |
| } |
| |
| if (prune_ref(ref_frame, ref_display_order_hint, |
| ref_display_order_hint[GOLDEN_FRAME - LAST_FRAME], |
| ref_frame_list)) |
| return 1; |
| } |
| |
| if (sf->inter_sf.selective_ref_frame >= 3) { |
| int ref_frame_list[2] = { ALTREF2_FRAME, BWDREF_FRAME }; |
| |
| if (x != NULL) { |
| // Disable pruning if either tpl suggests that we keep the frame or |
| // the pred_mv gives us the best sad |
| if (x->tpl_keep_ref_frame[ALTREF2_FRAME] || |
| x->pred_mv_sad[ALTREF2_FRAME] == x->best_pred_mv_sad[0]) { |
| ref_frame_list[0] = NONE_FRAME; |
| } |
| if (x->tpl_keep_ref_frame[BWDREF_FRAME] || |
| x->pred_mv_sad[BWDREF_FRAME] == x->best_pred_mv_sad[0]) { |
| ref_frame_list[1] = NONE_FRAME; |
| } |
| } |
| |
| if (prune_ref(ref_frame, ref_display_order_hint, |
| ref_display_order_hint[LAST_FRAME - LAST_FRAME], |
| ref_frame_list)) |
| return 1; |
| } |
| |
| if (x != NULL && sf->inter_sf.prune_comp_ref_frames && comp_pred) { |
| int closest_ref_frames = has_closest_ref_frames( |
| ref_frame, cpi->ref_frame_dist_info.nearest_past_ref, |
| cpi->ref_frame_dist_info.nearest_future_ref); |
| if (closest_ref_frames == 0) { |
| // Prune reference frames which are not the closest to the current frame. |
| if (sf->inter_sf.prune_comp_ref_frames >= 2) { |
| return 1; |
| } else if (sf->inter_sf.prune_comp_ref_frames == 1) { |
| // Prune reference frames with non minimum pred_mv_sad. |
| if (has_best_pred_mv_sad(ref_frame, x) == 0) return 1; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| // This function will copy the best reference mode information from |
| // MB_MODE_INFO_EXT to MB_MODE_INFO_EXT_FRAME. |
| static INLINE void av1_copy_mbmi_ext_to_mbmi_ext_frame( |
| MB_MODE_INFO_EXT_FRAME *mbmi_ext_best, |
| const MB_MODE_INFO_EXT *const mbmi_ext, uint8_t ref_frame_type) { |
| memcpy(mbmi_ext_best->ref_mv_stack, mbmi_ext->ref_mv_stack[ref_frame_type], |
| sizeof(mbmi_ext->ref_mv_stack[USABLE_REF_MV_STACK_SIZE])); |
| memcpy(mbmi_ext_best->weight, mbmi_ext->weight[ref_frame_type], |
| sizeof(mbmi_ext->weight[USABLE_REF_MV_STACK_SIZE])); |
| mbmi_ext_best->mode_context = mbmi_ext->mode_context[ref_frame_type]; |
| mbmi_ext_best->ref_mv_count = mbmi_ext->ref_mv_count[ref_frame_type]; |
| memcpy(mbmi_ext_best->global_mvs, mbmi_ext->global_mvs, |
| sizeof(mbmi_ext->global_mvs)); |
| } |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AOM_AV1_ENCODER_RDOPT_H_ |
