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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
| commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
| tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/aom/av1/encoder/speed_features.h | |
| parent | Initial commit. (diff) | |
| download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip | |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/aom/av1/encoder/speed_features.h')
| -rw-r--r-- | third_party/aom/av1/encoder/speed_features.h | 2025 |
1 files changed, 2025 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/speed_features.h b/third_party/aom/av1/encoder/speed_features.h new file mode 100644 index 0000000000..60c000e4f4 --- /dev/null +++ b/third_party/aom/av1/encoder/speed_features.h @@ -0,0 +1,2025 @@ +/* + * 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_SPEED_FEATURES_H_ +#define AOM_AV1_ENCODER_SPEED_FEATURES_H_ + +#include "av1/common/enums.h" +#include "av1/encoder/enc_enums.h" +#include "av1/encoder/mcomp.h" +#include "av1/encoder/encodemb.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/*! @file */ + +/*!\cond */ +#define MAX_MESH_STEP 4 + +typedef struct MESH_PATTERN { + int range; + int interval; +} MESH_PATTERN; + +enum { + GM_FULL_SEARCH, + GM_REDUCED_REF_SEARCH_SKIP_L2_L3, + GM_REDUCED_REF_SEARCH_SKIP_L2_L3_ARF2, + + // Same as GM_REDUCED_REF_SEARCH_SKIP_L2_L3_ARF2 but with extra filtering + // to keep at most two ref frames + GM_SEARCH_CLOSEST_REFS_ONLY, + + GM_DISABLE_SEARCH +} UENUM1BYTE(GM_SEARCH_TYPE); + +enum { + DIST_WTD_COMP_ENABLED, + DIST_WTD_COMP_SKIP_MV_SEARCH, + DIST_WTD_COMP_DISABLED, +} UENUM1BYTE(DIST_WTD_COMP_FLAG); + +enum { + INTRA_ALL = (1 << DC_PRED) | (1 << V_PRED) | (1 << H_PRED) | (1 << D45_PRED) | + (1 << D135_PRED) | (1 << D113_PRED) | (1 << D157_PRED) | + (1 << D203_PRED) | (1 << D67_PRED) | (1 << SMOOTH_PRED) | + (1 << SMOOTH_V_PRED) | (1 << SMOOTH_H_PRED) | (1 << PAETH_PRED), + UV_INTRA_ALL = + (1 << UV_DC_PRED) | (1 << UV_V_PRED) | (1 << UV_H_PRED) | + (1 << UV_D45_PRED) | (1 << UV_D135_PRED) | (1 << UV_D113_PRED) | + (1 << UV_D157_PRED) | (1 << UV_D203_PRED) | (1 << UV_D67_PRED) | + (1 << UV_SMOOTH_PRED) | (1 << UV_SMOOTH_V_PRED) | + (1 << UV_SMOOTH_H_PRED) | (1 << UV_PAETH_PRED) | (1 << UV_CFL_PRED), + UV_INTRA_DC = (1 << UV_DC_PRED), + UV_INTRA_DC_CFL = (1 << UV_DC_PRED) | (1 << UV_CFL_PRED), + UV_INTRA_DC_TM = (1 << UV_DC_PRED) | (1 << UV_PAETH_PRED), + UV_INTRA_DC_PAETH_CFL = + (1 << UV_DC_PRED) | (1 << UV_PAETH_PRED) | (1 << UV_CFL_PRED), + UV_INTRA_DC_H_V = (1 << UV_DC_PRED) | (1 << UV_V_PRED) | (1 << UV_H_PRED), + UV_INTRA_DC_H_V_CFL = (1 << UV_DC_PRED) | (1 << UV_V_PRED) | + (1 << UV_H_PRED) | (1 << UV_CFL_PRED), + UV_INTRA_DC_PAETH_H_V = (1 << UV_DC_PRED) | (1 << UV_PAETH_PRED) | + (1 << UV_V_PRED) | (1 << UV_H_PRED), + UV_INTRA_DC_PAETH_H_V_CFL = (1 << UV_DC_PRED) | (1 << UV_PAETH_PRED) | + (1 << UV_V_PRED) | (1 << UV_H_PRED) | + (1 << UV_CFL_PRED), + INTRA_DC = (1 << DC_PRED), + INTRA_DC_TM = (1 << DC_PRED) | (1 << PAETH_PRED), + INTRA_DC_H_V = (1 << DC_PRED) | (1 << V_PRED) | (1 << H_PRED), + INTRA_DC_H_V_SMOOTH = + (1 << DC_PRED) | (1 << V_PRED) | (1 << H_PRED) | (1 << SMOOTH_PRED), + INTRA_DC_PAETH_H_V = + (1 << DC_PRED) | (1 << PAETH_PRED) | (1 << V_PRED) | (1 << H_PRED) +}; + +enum { + INTER_ALL = (1 << NEARESTMV) | (1 << NEARMV) | (1 << GLOBALMV) | + (1 << NEWMV) | (1 << NEAREST_NEARESTMV) | (1 << NEAR_NEARMV) | + (1 << NEW_NEWMV) | (1 << NEAREST_NEWMV) | (1 << NEAR_NEWMV) | + (1 << NEW_NEARMV) | (1 << NEW_NEARESTMV) | (1 << GLOBAL_GLOBALMV), + INTER_NEAREST_NEAR_ZERO = (1 << NEARESTMV) | (1 << NEARMV) | (1 << GLOBALMV) | + (1 << NEAREST_NEARESTMV) | (1 << GLOBAL_GLOBALMV) | + (1 << NEAREST_NEWMV) | (1 << NEW_NEARESTMV) | + (1 << NEW_NEARMV) | (1 << NEAR_NEWMV) | + (1 << NEAR_NEARMV), + INTER_SINGLE_ALL = + (1 << NEARESTMV) | (1 << NEARMV) | (1 << GLOBALMV) | (1 << NEWMV), +}; + +enum { + DISABLE_ALL_INTER_SPLIT = (1 << THR_COMP_GA) | (1 << THR_COMP_LA) | + (1 << THR_ALTR) | (1 << THR_GOLD) | (1 << THR_LAST), + + DISABLE_ALL_SPLIT = (1 << THR_INTRA) | DISABLE_ALL_INTER_SPLIT, + + DISABLE_COMPOUND_SPLIT = (1 << THR_COMP_GA) | (1 << THR_COMP_LA), + + LAST_AND_INTRA_SPLIT_ONLY = (1 << THR_COMP_GA) | (1 << THR_COMP_LA) | + (1 << THR_ALTR) | (1 << THR_GOLD) +}; + +enum { + TXFM_CODING_SF = 1, + INTER_PRED_SF = 2, + INTRA_PRED_SF = 4, + PARTITION_SF = 8, + LOOP_FILTER_SF = 16, + RD_SKIP_SF = 32, + RESERVE_2_SF = 64, + RESERVE_3_SF = 128, +} UENUM1BYTE(DEV_SPEED_FEATURES); + +/* This enumeration defines when the rate control recode loop will be + * enabled. + */ +enum { + /* + * No recodes allowed + */ + DISALLOW_RECODE = 0, + /* + * Allow recode only for KF/ARF/GF frames + */ + ALLOW_RECODE_KFARFGF = 1, + /* + * Allow recode for all frame types based on bitrate constraints. + */ + ALLOW_RECODE = 2, +} UENUM1BYTE(RECODE_LOOP_TYPE); + +enum { + SUBPEL_TREE = 0, + SUBPEL_TREE_PRUNED = 1, // Prunes 1/2-pel searches + SUBPEL_TREE_PRUNED_MORE = 2, // Prunes 1/2-pel searches more aggressively + SUBPEL_SEARCH_METHODS +} UENUM1BYTE(SUBPEL_SEARCH_METHOD); + +enum { + // Try the full image with different values. + LPF_PICK_FROM_FULL_IMAGE, + // Try the full image filter search with non-dual filter only. + LPF_PICK_FROM_FULL_IMAGE_NON_DUAL, + // Try a small portion of the image with different values. + LPF_PICK_FROM_SUBIMAGE, + // Estimate the level based on quantizer and frame type + LPF_PICK_FROM_Q, + // Pick 0 to disable LPF if LPF was enabled last frame + LPF_PICK_MINIMAL_LPF +} UENUM1BYTE(LPF_PICK_METHOD); +/*!\endcond */ + +/*!\enum CDEF_PICK_METHOD + * \brief This enumeration defines a variety of CDEF pick methods + */ +typedef enum { + CDEF_FULL_SEARCH, /**< Full search */ + CDEF_FAST_SEARCH_LVL1, /**< Search among a subset of all possible filters. */ + CDEF_FAST_SEARCH_LVL2, /**< Search reduced subset of filters than Level 1. */ + CDEF_FAST_SEARCH_LVL3, /**< Search reduced subset of secondary filters than + Level 2. */ + CDEF_FAST_SEARCH_LVL4, /**< Search reduced subset of filters than Level 3. */ + CDEF_FAST_SEARCH_LVL5, /**< Search reduced subset of filters than Level 4. */ + CDEF_PICK_FROM_Q, /**< Estimate filter strength based on quantizer. */ + CDEF_PICK_METHODS +} CDEF_PICK_METHOD; + +/*!\cond */ +enum { + // Terminate search early based on distortion so far compared to + // qp step, distortion in the neighborhood of the frame, etc. + FLAG_EARLY_TERMINATE = 1 << 0, + + // Skips comp inter modes if the best so far is an intra mode. + FLAG_SKIP_COMP_BESTINTRA = 1 << 1, + + // Skips oblique intra modes if the best so far is an inter mode. + FLAG_SKIP_INTRA_BESTINTER = 1 << 3, + + // Skips oblique intra modes at angles 27, 63, 117, 153 if the best + // intra so far is not one of the neighboring directions. + FLAG_SKIP_INTRA_DIRMISMATCH = 1 << 4, + + // Skips intra modes other than DC_PRED if the source variance is small + FLAG_SKIP_INTRA_LOWVAR = 1 << 5, +} UENUM1BYTE(MODE_SEARCH_SKIP_LOGIC); + +enum { + // No tx type pruning + TX_TYPE_PRUNE_0 = 0, + // adaptively prunes the least perspective tx types out of all 16 + // (tuned to provide negligible quality loss) + TX_TYPE_PRUNE_1 = 1, + // similar, but applies much more aggressive pruning to get better speed-up + TX_TYPE_PRUNE_2 = 2, + TX_TYPE_PRUNE_3 = 3, + // More aggressive pruning based on tx type score and allowed tx count + TX_TYPE_PRUNE_4 = 4, + TX_TYPE_PRUNE_5 = 5, +} UENUM1BYTE(TX_TYPE_PRUNE_MODE); + +enum { + // No reaction to rate control on a detected slide/scene change. + NO_DETECTION = 0, + + // Set to larger Q based only on the detected slide/scene change and + // current/past Q. + FAST_DETECTION_MAXQ = 1, +} UENUM1BYTE(OVERSHOOT_DETECTION_CBR); + +enum { + // Turns off multi-winner mode. So we will do txfm search on either all modes + // if winner mode is off, or we will only on txfm search on a single winner + // mode. + MULTI_WINNER_MODE_OFF = 0, + + // Limits the number of winner modes to at most 2 + MULTI_WINNER_MODE_FAST = 1, + + // Uses the default number of winner modes, which is 3 for intra mode, and 1 + // for inter mode. + MULTI_WINNER_MODE_DEFAULT = 2, + + // Maximum number of winner modes allowed. + MULTI_WINNER_MODE_LEVELS, +} UENUM1BYTE(MULTI_WINNER_MODE_TYPE); + +enum { + PRUNE_NEARMV_OFF = 0, // Turn off nearmv pruning + PRUNE_NEARMV_LEVEL1 = 1, // Prune nearmv for qindex (0-85) + PRUNE_NEARMV_LEVEL2 = 2, // Prune nearmv for qindex (0-170) + PRUNE_NEARMV_LEVEL3 = 3, // Prune nearmv more aggressively for qindex (0-170) + PRUNE_NEARMV_MAX = PRUNE_NEARMV_LEVEL3, +} UENUM1BYTE(PRUNE_NEARMV_LEVEL); + +enum { + // Default transform search used in evaluation of best inter candidates + // (MODE_EVAL stage) and motion mode winner processing (WINNER_MODE_EVAL + // stage). + TX_SEARCH_DEFAULT = 0, + // Transform search in motion mode rd during MODE_EVAL stage. + TX_SEARCH_MOTION_MODE, + // Transform search in compound type mode rd during MODE_EVAL stage. + TX_SEARCH_COMP_TYPE_MODE, + // All transform search cases + TX_SEARCH_CASES +} UENUM1BYTE(TX_SEARCH_CASE); + +typedef struct { + TX_TYPE_PRUNE_MODE prune_2d_txfm_mode; + int fast_intra_tx_type_search; + + // INT_MAX: Disable fast search. + // 1 - 1024: Probability threshold used for conditionally forcing tx type, + // during mode search. + // 0: Force tx type to be DCT_DCT unconditionally, during + // mode search. + int fast_inter_tx_type_prob_thresh; + + // Prune less likely chosen transforms for each intra mode. The speed + // feature ranges from 0 to 2, for different speed / compression trade offs. + int use_reduced_intra_txset; + + // Use a skip flag prediction model to detect blocks with skip = 1 early + // and avoid doing full TX type search for such blocks. + int use_skip_flag_prediction; + + // Threshold used by the ML based method to predict TX block split decisions. + int ml_tx_split_thresh; + + // skip remaining transform type search when we found the rdcost of skip is + // better than applying transform + int skip_tx_search; + + // Prune tx type search using previous frame stats. + int prune_tx_type_using_stats; + // Prune tx type search using estimated RDcost + int prune_tx_type_est_rd; + + // Flag used to control the winner mode processing for tx type pruning for + // inter blocks. It enables further tx type mode pruning based on ML model for + // mode evaluation and disables tx type mode pruning for winner mode + // processing. + int winner_mode_tx_type_pruning; +} TX_TYPE_SEARCH; + +enum { + // Search partitions using RD criterion + SEARCH_PARTITION, + + // Always use a fixed size partition + FIXED_PARTITION, + + // Partition using source variance + VAR_BASED_PARTITION, + +#if CONFIG_RT_ML_PARTITIONING + // Partition using ML model + ML_BASED_PARTITION +#endif +} UENUM1BYTE(PARTITION_SEARCH_TYPE); + +enum { + NOT_IN_USE, + DIRECT_PRED, + RELAXED_PRED, + ADAPT_PRED +} UENUM1BYTE(MAX_PART_PRED_MODE); + +enum { + LAST_MV_DATA, + CURRENT_Q, + QTR_ONLY, +} UENUM1BYTE(MV_PREC_LOGIC); + +enum { + SUPERRES_AUTO_ALL, // Tries all possible superres ratios + SUPERRES_AUTO_DUAL, // Tries no superres and q-based superres ratios + SUPERRES_AUTO_SOLO, // Only apply the q-based superres ratio +} UENUM1BYTE(SUPERRES_AUTO_SEARCH_TYPE); +/*!\endcond */ + +/*!\enum INTERNAL_COST_UPDATE_TYPE + * \brief This enum decides internally how often to update the entropy costs + * + * INTERNAL_COST_UPD_TYPE is similar to \ref COST_UPDATE_TYPE but has slightly + * more flexibility in update frequency. This enum is separate from \ref + * COST_UPDATE_TYPE because although \ref COST_UPDATE_TYPE is not exposed, its + * values are public so it cannot be modified without breaking public API. + * Due to the use of AOMMIN() in populate_unified_cost_update_freq() to + * compute the unified cost update frequencies (out of COST_UPDATE_TYPE and + * INTERNAL_COST_UPDATE_TYPE), the values of this enum type must be listed in + * the order of increasing frequencies. + * + * \warning In case of any updates/modifications to the enum COST_UPDATE_TYPE, + * update the enum INTERNAL_COST_UPDATE_TYPE as well. + */ +typedef enum { + INTERNAL_COST_UPD_OFF, /*!< Turn off cost updates. */ + INTERNAL_COST_UPD_TILE, /*!< Update every tile. */ + INTERNAL_COST_UPD_SBROW_SET, /*!< Update every row_set of height 256 pixs. */ + INTERNAL_COST_UPD_SBROW, /*!< Update every sb rows inside a tile. */ + INTERNAL_COST_UPD_SB, /*!< Update every sb. */ +} INTERNAL_COST_UPDATE_TYPE; + +/*!\enum SIMPLE_MOTION_SEARCH_PRUNE_LEVEL + * \brief This enumeration defines a variety of simple motion search based + * partition prune levels + */ +typedef enum { + NO_PRUNING = -1, + SIMPLE_AGG_LVL0, /*!< Simple prune aggressiveness level 0. */ + SIMPLE_AGG_LVL1, /*!< Simple prune aggressiveness level 1. */ + SIMPLE_AGG_LVL2, /*!< Simple prune aggressiveness level 2. */ + SIMPLE_AGG_LVL3, /*!< Simple prune aggressiveness level 3. */ + QIDX_BASED_AGG_LVL1, /*!< Qindex based prune aggressiveness level, aggressive + level maps to simple agg level 1 or 2 based on qindex. + */ + TOTAL_SIMPLE_AGG_LVLS = QIDX_BASED_AGG_LVL1, /*!< Total number of simple prune + aggressiveness levels. */ + TOTAL_QINDEX_BASED_AGG_LVLS = + QIDX_BASED_AGG_LVL1 - + SIMPLE_AGG_LVL3, /*!< Total number of qindex based simple prune + aggressiveness levels. */ + TOTAL_AGG_LVLS = TOTAL_SIMPLE_AGG_LVLS + + TOTAL_QINDEX_BASED_AGG_LVLS, /*!< Total number of levels. */ +} SIMPLE_MOTION_SEARCH_PRUNE_LEVEL; + +/*!\enum PRUNE_MESH_SEARCH_LEVEL + * \brief This enumeration defines a variety of mesh search prune levels. + */ +typedef enum { + PRUNE_MESH_SEARCH_DISABLED = 0, /*!< Prune mesh search level 0. */ + PRUNE_MESH_SEARCH_LVL_1 = 1, /*!< Prune mesh search level 1. */ + PRUNE_MESH_SEARCH_LVL_2 = 2, /*!< Prune mesh search level 2. */ +} PRUNE_MESH_SEARCH_LEVEL; + +/*!\enum INTER_SEARCH_EARLY_TERM_IDX + * \brief This enumeration defines inter search early termination index in + * non-rd path based on sse value. + */ +typedef enum { + EARLY_TERM_DISABLED = + 0, /*!< Early terminate inter mode search based on sse disabled. */ + EARLY_TERM_IDX_1 = + 1, /*!< Early terminate inter mode search based on sse, index 1. */ + EARLY_TERM_IDX_2 = + 2, /*!< Early terminate inter mode search based on sse, index 2. */ + EARLY_TERM_IDX_3 = + 3, /*!< Early terminate inter mode search based on sse, index 3. */ + EARLY_TERM_IDX_4 = + 4, /*!< Early terminate inter mode search based on sse, index 4. */ + EARLY_TERM_INDICES, /*!< Total number of early terminate indices */ +} INTER_SEARCH_EARLY_TERM_IDX; + +/*! + * \brief Sequence/frame level speed vs quality features + */ +typedef struct HIGH_LEVEL_SPEED_FEATURES { + /*! Frame level coding parameter update. */ + int frame_parameter_update; + + /*! + * Cases and frame types for which the recode loop is enabled. + */ + RECODE_LOOP_TYPE recode_loop; + + /*! + * Controls the tolerance vs target rate used in deciding whether to + * recode a frame. It has no meaning if recode is disabled. + */ + int recode_tolerance; + + /*! + * Determine how motion vector precision is chosen. The possibilities are: + * LAST_MV_DATA: use the mv data from the last coded frame + * CURRENT_Q: use the current q as a threshold + * QTR_ONLY: use quarter pel precision only. + */ + MV_PREC_LOGIC high_precision_mv_usage; + + /*! + * Always set to 0. If on it enables 0 cost background transmission + * (except for the initial transmission of the segmentation). The feature is + * disabled because the addition of very large block sizes make the + * backgrounds very to cheap to encode, and the segmentation we have + * adds overhead. + */ + int static_segmentation; + + /*! + * Superres-auto mode search type: + */ + SUPERRES_AUTO_SEARCH_TYPE superres_auto_search_type; + + /*! + * Enable/disable extra screen content test by encoding key frame twice. + */ + int disable_extra_sc_testing; + + /*! + * Enable/disable second_alt_ref temporal filtering. + */ + int second_alt_ref_filtering; + + /*! + * The number of frames to be used during temporal filtering of an ARF frame + * is adjusted based on noise level of the current frame. The sf has three + * levels to decide number of frames to be considered for filtering: + * 0 : Use default number of frames + * 1 and 2 : Reduce the number of frames based on noise level with varied + * aggressiveness + */ + int adjust_num_frames_for_arf_filtering; + + /*! + * Decide the bit estimation approach used in qindex decision. + * 0: estimate bits based on a constant value; + * 1: estimate bits more accurately based on the frame complexity. + */ + int accurate_bit_estimate; + + /*! + * Decide the approach for weight calculation during temporal filtering. + * 0: Calculate weight using exp() + * 1: Calculate weight using a lookup table that approximates exp(). + */ + int weight_calc_level_in_tf; + + /*! + * Decide whether to perform motion estimation at split block (i.e. 16x16) + * level or not. + * 0: Always allow motion estimation. + * 1: Conditionally allow motion estimation based on 4x4 sub-blocks variance. + */ + int allow_sub_blk_me_in_tf; +} HIGH_LEVEL_SPEED_FEATURES; + +/*! + * Speed features for the first pass. + */ +typedef struct FIRST_PASS_SPEED_FEATURES { + /*! + * \brief Reduces the mv search window. + * By default, the initial search window is around + * MIN(MIN(dims), MAX_FULL_PEL_VAL) = MIN(MIN(dims), 1023). + * Each step reduction decrease the window size by about a factor of 2. + */ + int reduce_mv_step_param; + + /*! + * \brief Skips the motion search when the zero mv has small sse. + */ + int skip_motion_search_threshold; + + /*! + * \brief Skips reconstruction by using source buffers for prediction + */ + int disable_recon; + + /*! + * \brief Skips the motion search centered on 0,0 mv. + */ + int skip_zeromv_motion_search; +} FIRST_PASS_SPEED_FEATURES; + +/*!\cond */ +typedef struct TPL_SPEED_FEATURES { + // GOP length adaptive decision. + // If set to 0, tpl model decides whether a shorter gf interval is better. + // If set to 1, tpl stats of ARFs from base layer, (base+1) layer and + // (base+2) layer decide whether a shorter gf interval is better. + // If set to 2, tpl stats of ARFs from base layer, (base+1) layer and GF boost + // decide whether a shorter gf interval is better. + // If set to 3, gop length adaptive decision is disabled. + int gop_length_decision_method; + // Prune the intra modes search by tpl. + // If set to 0, we will search all intra modes from DC_PRED to PAETH_PRED. + // If set to 1, we only search DC_PRED, V_PRED, and H_PRED. + int prune_intra_modes; + // This parameter controls which step in the n-step process we start at. + int reduce_first_step_size; + // Skip motion estimation based on the precision of center MVs and the + // difference between center MVs. + // If set to 0, motion estimation is skipped for duplicate center MVs + // (default). If set to 1, motion estimation is skipped for duplicate + // full-pixel center MVs. If set to 2, motion estimation is skipped if the + // difference between center MVs is less than the threshold. + int skip_alike_starting_mv; + + // When to stop subpel search. + SUBPEL_FORCE_STOP subpel_force_stop; + + // Which search method to use. + SEARCH_METHODS search_method; + + // Prune starting mvs in TPL based on sad scores. + int prune_starting_mv; + + // Prune reference frames in TPL. + int prune_ref_frames_in_tpl; + + // Support compound predictions. + int allow_compound_pred; + + // Calculate rate and distortion based on Y plane only. + int use_y_only_rate_distortion; + + // Use SAD instead of SATD during intra/inter mode search. + // If set to 0, use SATD always. + // If set to 1, use SAD during intra/inter mode search for frames in the + // higher temporal layers of the hierarchical prediction structure. + // If set to 2, use SAD during intra/inter mode search for all frames. + // This sf is disabled for the first GF group of the key-frame interval, + // i.e., SATD is used during intra/inter mode search of the first GF group. + int use_sad_for_mode_decision; + + // Skip tpl processing for frames of type LF_UPDATE. + // This sf is disabled for the first GF group of the key-frame interval. + int reduce_num_frames; +} TPL_SPEED_FEATURES; + +typedef struct GLOBAL_MOTION_SPEED_FEATURES { + GM_SEARCH_TYPE gm_search_type; + + // During global motion estimation, prune remaining reference frames in a + // given direction(past/future), if the evaluated ref_frame in that direction + // yields gm_type as INVALID/TRANSLATION/IDENTITY + int prune_ref_frame_for_gm_search; + + // When the current GM type is set to ZEROMV, prune ZEROMV if its performance + // is worse than NEWMV under SSE metric. + // 0 : no pruning + // 1 : conservative pruning + // 2 : aggressive pruning + int prune_zero_mv_with_sse; + + // Disable global motion estimation based on stats of previous frames in the + // GF group + int disable_gm_search_based_on_stats; + + // Number of refinement steps to apply after initial model generation + int num_refinement_steps; +} GLOBAL_MOTION_SPEED_FEATURES; + +typedef struct PARTITION_SPEED_FEATURES { + PARTITION_SEARCH_TYPE partition_search_type; + + // Used if partition_search_type = FIXED_PARTITION + BLOCK_SIZE fixed_partition_size; + + // Prune extended partition types search based on the current best partition + // and the combined rdcost of the subblocks estimated from previous + // partitions. Can take values 0 - 2, 0 referring to no pruning, and 1 - 2 + // increasing aggressiveness of pruning in order. + int prune_ext_partition_types_search_level; + + // Prune part4 based on block size + int prune_part4_search; + + // Use a ML model to prune rectangular, ab and 4-way horz + // and vert partitions + int ml_prune_partition; + + // Use a ML model to adaptively terminate partition search after trying + // PARTITION_SPLIT. Can take values 0 - 2, 0 meaning not being enabled, and + // 1 - 2 increasing aggressiveness in order. + int ml_early_term_after_part_split_level; + + // Skip rectangular partition test when partition type none gives better + // rd than partition type split. Can take values 0 - 2, 0 referring to no + // skipping, and 1 - 2 increasing aggressiveness of skipping in order. + int less_rectangular_check_level; + + // Use square partition only beyond this block size. + BLOCK_SIZE use_square_partition_only_threshold; + + // Sets max square partition levels for this superblock based on + // motion vector and prediction error distribution produced from 16x16 + // simple motion search + MAX_PART_PRED_MODE auto_max_partition_based_on_simple_motion; + + // Min and max square partition size we enable (block_size) as per auto + // min max, but also used by adjust partitioning, and pick_partitioning. + BLOCK_SIZE default_min_partition_size; + BLOCK_SIZE default_max_partition_size; + + // Sets level of adjustment of variance-based partitioning during + // rd_use_partition 0 - no partition adjustment, 1 - try to merge partitions + // for small blocks and high QP, 2 - try to merge partitions, 3 - try to merge + // and split leaf partitions and 0 - 3 decreasing aggressiveness in order. + int adjust_var_based_rd_partitioning; + + // Partition search early breakout thresholds. + int64_t partition_search_breakout_dist_thr; + int partition_search_breakout_rate_thr; + + // Thresholds for ML based partition search breakout. + int ml_partition_search_breakout_thresh[PARTITION_BLOCK_SIZES]; + + // Aggressiveness levels for pruning split and rectangular partitions based on + // simple_motion_search. SIMPLE_AGG_LVL0 to SIMPLE_AGG_LVL3 correspond to + // simple motion search based pruning. QIDX_BASED_AGG_LVL1 corresponds to + // qindex based and simple motion search based pruning. + int simple_motion_search_prune_agg; + + // Perform simple_motion_search on each possible subblock and use it to prune + // PARTITION_HORZ and PARTITION_VERT. + int simple_motion_search_prune_rect; + + // Perform simple motion search before none_partition to decide if we + // want to remove all partitions other than PARTITION_SPLIT. If set to 0, this + // model is disabled. If set to 1, the model attempts to perform + // PARTITION_SPLIT only. If set to 2, the model also attempts to prune + // PARTITION_SPLIT. + int simple_motion_search_split; + + // Use features from simple_motion_search to terminate prediction block + // partition after PARTITION_NONE + int simple_motion_search_early_term_none; + + // Controls whether to reduce the number of motion search steps. If this is 0, + // then simple_motion_search has the same number of steps as + // single_motion_search (assuming no other speed features). Otherwise, reduce + // the number of steps by the value contained in this variable. + int simple_motion_search_reduce_search_steps; + + // This variable controls the maximum block size where intra blocks can be + // used in inter frames. + // TODO(aconverse): Fold this into one of the other many mode skips + BLOCK_SIZE max_intra_bsize; + + // Use CNN with luma pixels on source frame on each of the 64x64 subblock to + // perform partition pruning in intra frames. + // 0: No Pruning + // 1: Prune split and rectangular partitions only + // 2: Prune none, split and rectangular partitions + int intra_cnn_based_part_prune_level; + + // Disable extended partition search if the current bsize is greater than the + // threshold. Must be a square block size BLOCK_8X8 or higher. + BLOCK_SIZE ext_partition_eval_thresh; + + // Use best partition decision so far to tune 'ext_partition_eval_thresh' + int ext_part_eval_based_on_cur_best; + + // Disable rectangular partitions for larger block sizes. + int rect_partition_eval_thresh; + + // Prune extended partition search based on whether the split/rect partitions + // provided an improvement in the previous search. + // 0 : no pruning + // 1 : prune 1:4 partition search using winner info from split partitions + // 2 : prune 1:4 and AB partition search using split and HORZ/VERT info + int prune_ext_part_using_split_info; + + // Prunt rectangular, AB and 4-way partition based on q index and block size + // 0 : no pruning + // 1 : prune sub_8x8 at very low quantizers + // 2 : prune all block size based on qindex + int prune_rectangular_split_based_on_qidx; + + // Prune rectangular partitions based on 4x4 sub-block variance + // false : no pruning + // true : prune rectangular partitions based on 4x4 sub-block variance + // deviation + // + // For allintra encode, this speed feature reduces instruction count by 6.4% + // for speed=6 with coding performance change less than 0.24%. For AVIF image + // encode, this speed feature reduces encode time by 8.14% for speed 6 on a + // typical image dataset with coding performance change less than 0.16%. This + // speed feature is not applicable to speed >= 7. + bool prune_rect_part_using_4x4_var_deviation; + + // Prune rectangular partitions based on prediction mode chosen by NONE + // partition. + // false : no pruning + // true : prunes rectangular partition as described below + // If prediction mode chosen by NONE partition is + // DC_PRED or SMOOTH_PRED: Prunes both horizontal and vertical partitions if + // at least one of the left and top neighbor blocks is larger than the + // current block. + // Directional Mode: Prunes either of the horizontal and vertical partition + // based on center angle of the prediction mode chosen by NONE partition. For + // example, vertical partition is pruned if center angle of the prediction + // mode chosen by NONE partition is close to 180 degrees (i.e. horizontal + // direction) and vice versa. + // For allintra encode, this speed feature reduces instruction count by 5.1% + // for speed=6 with coding performance change less than 0.22%. For AVIF image + // encode, this speed feature reduces encode time by 4.44% for speed 6 on a + // typical image dataset with coding performance change less than 0.15%. + // For speed >= 7, variance-based logic is used to determine the partition + // structure instead of recursive partition search. Therefore, this speed + // feature is not applicable in such cases. + bool prune_rect_part_using_none_pred_mode; + + // Terminate partition search for child partition, + // when NONE and SPLIT partition rd_costs are INT64_MAX. + int early_term_after_none_split; + + // Level used to adjust threshold for av1_ml_predict_breakout(). At lower + // levels, more conservative threshold is used, and value of 0 indicates + // av1_ml_predict_breakout() is disabled. Value of 3 corresponds to default + // case with no adjustment to lbd thresholds. + int ml_predict_breakout_level; + + // Prune sub_8x8 (BLOCK_4X4, BLOCK_4X8 and BLOCK_8X4) partitions. + // 0 : no pruning + // 1 : pruning based on neighbour block information + // 2 : prune always + int prune_sub_8x8_partition_level; + + // Prune rectangular split based on simple motion search split/no_split score. + // 0: disable pruning, 1: enable pruning + int simple_motion_search_rect_split; + + // The current encoder adopts a DFS search for block partitions. + // Therefore the mode selection and associated rdcost is ready for smaller + // blocks before the mode selection for some partition types. + // AB partition could use previous rd information and skip mode search. + // An example is: + // + // current block + // +---+---+ + // | | + // + + + // | | + // +-------+ + // + // SPLIT partition has been searched first before trying HORZ_A + // +---+---+ + // | R | R | + // +---+---+ + // | R | R | + // +---+---+ + // + // HORZ_A + // +---+---+ + // | | | + // +---+---+ + // | | + // +-------+ + // + // With this speed feature, the top two sub blocks can directly use rdcost + // searched in split partition, and the mode info is also copied from + // saved info. Similarly, the bottom rectangular block can also use + // the available information from previous rectangular search. + int reuse_prev_rd_results_for_part_ab; + + // Reuse the best prediction modes found in PARTITION_SPLIT and PARTITION_RECT + // when encoding PARTITION_AB. + int reuse_best_prediction_for_part_ab; + + // The current partition search records the best rdcost so far and uses it + // in mode search and transform search to early skip when some criteria is + // met. For example, when the current rdcost is larger than the best rdcost, + // or the model rdcost is larger than the best rdcost times some thresholds. + // By default, this feature is turned on to speed up the encoder partition + // search. + // If disabling it, at speed 0, 30 frames, we could get + // about -0.25% quality gain (psnr, ssim, vmaf), with about 13% slowdown. + int use_best_rd_for_pruning; + + // Skip evaluation of non-square partitions based on the corresponding NONE + // partition. + // 0: no pruning + // 1: prune extended partitions if NONE is skippable + // 2: on top of 1, prune rectangular partitions if NONE is inter, not a newmv + // mode and skippable + int skip_non_sq_part_based_on_none; + + // Disables 8x8 and below partitions for low quantizers. + int disable_8x8_part_based_on_qidx; +} PARTITION_SPEED_FEATURES; + +typedef struct MV_SPEED_FEATURES { + // Motion search method (Diamond, NSTEP, Hex, Big Diamond, Square, etc). + SEARCH_METHODS search_method; + + // Enable the use of faster, less accurate mv search method + // 0: disable, 1: if bsize >= BLOCK_32X32, 2: based on bsize, SAD and qp + // TODO(chiyotsai@google.com): Take the clip's resolution and mv activity into + // account. + int use_bsize_dependent_search_method; + + // If this is set to 1, we limit the motion search range to 2 times the + // largest motion vector found in the last frame. + int auto_mv_step_size; + + // Subpel_search_method can only be subpel_tree which does a subpixel + // logarithmic search that keeps stepping at 1/2 pixel units until + // you stop getting a gain, and then goes on to 1/4 and repeats + // the same process. Along the way it skips many diagonals. + SUBPEL_SEARCH_METHOD subpel_search_method; + + // Maximum number of steps in logarithmic subpel search before giving up. + int subpel_iters_per_step; + + // When to stop subpel search. + SUBPEL_FORCE_STOP subpel_force_stop; + + // When to stop subpel search in simple motion search. + SUBPEL_FORCE_STOP simple_motion_subpel_force_stop; + + // If true, sub-pixel search uses the exact convolve function used for final + // encoding and decoding; otherwise, it uses bilinear interpolation. + SUBPEL_SEARCH_TYPE use_accurate_subpel_search; + + // Threshold for allowing exhaustive motion search. + int exhaustive_searches_thresh; + + // Pattern to be used for any exhaustive mesh searches (except intraBC ME). + MESH_PATTERN mesh_patterns[MAX_MESH_STEP]; + + // Pattern to be used for exhaustive mesh searches of intraBC ME. + MESH_PATTERN intrabc_mesh_patterns[MAX_MESH_STEP]; + + // Reduce single motion search range based on MV result of prior ref_mv_idx. + int reduce_search_range; + + // Prune mesh search. + PRUNE_MESH_SEARCH_LEVEL prune_mesh_search; + + // Use the rd cost around the best FULLPEL_MV to speed up subpel search + int use_fullpel_costlist; + + // Set the full pixel search level of obmc + // 0: obmc_full_pixel_diamond + // 1: obmc_refining_search_sad (faster) + int obmc_full_pixel_search_level; + + // Accurate full pixel motion search based on TPL stats. + int full_pixel_search_level; + + // Allow intrabc motion search + int use_intrabc; + + // Whether to downsample the rows in sad calculation during motion search. + // This is only active when there are at least 16 rows. When this sf is + // active, if there is a large discrepancy in the SAD values for the final + // motion vector between skipping vs not skipping, motion search is redone + // with skip row features off. + // 0: Disabled (do not downsample rows) + // 1: Skip SAD calculation of odd rows if the SAD deviation of the even and + // odd rows for the starting MV is small. Redo motion search with sf off + // when SAD deviation is high for the final motion vector. + // 2: Skip SAD calculation of odd rows. SAD deviation is not tested for the + // start MV and tested only for the final MV. + int use_downsampled_sad; + + // Enable/disable extensive joint motion search. + int disable_extensive_joint_motion_search; + + // Enable second best mv check in joint mv search. + // 0: allow second MV (use rd cost as the metric) + // 1: use var as the metric + // 2: disable second MV + int disable_second_mv; + + // Skips full pixel search based on start mv of prior ref_mv_idx. + // 0: Disabled + // 1: Skips the full pixel search upto 4 neighbor full-pel MV positions. + // 2: Skips the full pixel search upto 8 neighbor full-pel MV positions. + int skip_fullpel_search_using_startmv; + + // Method to use for refining WARPED_CAUSAL motion vectors + // TODO(rachelbarker): Can this be unified with OBMC in some way? + WARP_SEARCH_METHOD warp_search_method; + + // Maximum number of iterations in WARPED_CAUSAL refinement search + int warp_search_iters; +} MV_SPEED_FEATURES; + +typedef struct INTER_MODE_SPEED_FEATURES { + // 2-pass inter mode model estimation where the preliminary pass skips + // transform search and uses a model to estimate rd, while the final pass + // computes the full transform search. Two types of models are supported: + // 0: not used + // 1: used with online dynamic rd model + // 2: used with static rd model + int inter_mode_rd_model_estimation; + + // Bypass transform search based on skip rd at following stages + // i. Compound type mode search + // ii. Motion mode search (mode evaluation and winner motion mode stage) + // iii. Transform search for best inter candidates + int txfm_rd_gate_level[TX_SEARCH_CASES]; + + // Limit the inter mode tested in the RD loop + int reduce_inter_modes; + + // This variable is used to cap the maximum number of times we skip testing a + // mode to be evaluated. A high value means we will be faster. + int adaptive_rd_thresh; + + // Aggressively prune inter modes when best mode is skippable. + int prune_inter_modes_if_skippable; + + // Drop less likely to be picked reference frames in the RD search. + // Has seven levels for now: 0, 1, 2, 3, 4, 5 and 6 where higher levels prune + // more aggressively than lower ones. (0 means no pruning). + int selective_ref_frame; + + // Prune reference frames for rectangular partitions. + // 0 implies no pruning + // 1 implies prune for extended partition + // 2 implies prune horiz, vert and extended partition + int prune_ref_frame_for_rect_partitions; + + // Prune inter modes w.r.t past reference frames + // 0 no pruning + // 1 prune inter modes w.r.t ALTREF2 and ALTREF reference frames + // 2 prune inter modes w.r.t BWDREF, ALTREF2 and ALTREF reference frames + int alt_ref_search_fp; + + // Prune reference frames for single prediction modes based on temporal + // distance and pred MV SAD. Feasible values are 0, 1, 2. The feature is + // disabled for 0. An increasing value indicates more aggressive pruning + // threshold. + int prune_single_ref; + + // Prune compound reference frames + // 0 no pruning + // 1 prune compound references which do not satisfy the two conditions: + // a) The references are at a nearest distance from the current frame in + // both past and future direction. + // b) The references have minimum pred_mv_sad in both past and future + // direction. + // 2 prune compound references except the one with nearest distance from the + // current frame in both past and future direction. + int prune_comp_ref_frames; + + // Skip the current ref_mv in NEW_MV mode based on mv, rate cost, etc. + // This speed feature equaling 0 means no skipping. + // If the speed feature equals 1 or 2, skip the current ref_mv in NEW_MV mode + // if we have already encountered ref_mv in the drl such that: + // 1. The other drl has the same mv during the SIMPLE_TRANSLATION search + // process as the current mv. + // 2. The rate needed to encode the current mv is larger than that for the + // other ref_mv. + // The speed feature equaling 1 means using subpel mv in the comparison. + // The speed feature equaling 2 means using fullpel mv in the comparison. + // If the speed feature >= 3, skip the current ref_mv in NEW_MV mode based on + // known full_mv bestsme and drl cost. + int skip_newmv_in_drl; + + // This speed feature checks duplicate ref MVs among NEARESTMV, NEARMV, + // GLOBALMV and skips NEARMV or GLOBALMV (in order) if a duplicate is found + // TODO(any): Instead of skipping repeated ref mv, use the recalculated + // rd-cost based on mode rate and skip the mode evaluation + int skip_repeated_ref_mv; + + // Flag used to control the ref_best_rd based gating for chroma + int perform_best_rd_based_gating_for_chroma; + + // Reuse the inter_intra_mode search result from NEARESTMV mode to other + // single ref modes + int reuse_inter_intra_mode; + + // prune wedge and compound segment approximate rd evaluation based on + // compound average modeled rd + int prune_comp_type_by_model_rd; + + // prune wedge and compound segment approximate rd evaluation based on + // compound average rd/ref_best_rd + int prune_comp_type_by_comp_avg; + + // Skip some ref frames in compound motion search by single motion search + // result. Has three levels for now: 0 referring to no skipping, and 1 - 3 + // increasing aggressiveness of skipping in order. + // Note: The search order might affect the result. It assumes that the single + // reference modes are searched before compound modes. It is better to search + // same single inter mode as a group. + int prune_comp_search_by_single_result; + + // Instead of performing a full MV search, do a simple translation first + // and only perform a full MV search on the motion vectors that performed + // well. + int prune_mode_search_simple_translation; + + // Only search compound modes with at least one "good" reference frame. + // A reference frame is good if, after looking at its performance among + // the single reference modes, it is one of the two best performers. + int prune_compound_using_single_ref; + + // Skip extended compound mode (NEAREST_NEWMV, NEW_NEARESTMV, NEAR_NEWMV, + // NEW_NEARMV) using ref frames of above and left neighbor + // blocks. + // 0 : no pruning + // 1 : prune ext compound modes using neighbor blocks (less aggressiveness) + // 2 : prune ext compound modes using neighbor blocks (high aggressiveness) + // 3 : prune ext compound modes unconditionally (highest aggressiveness) + int prune_ext_comp_using_neighbors; + + // Skip NEW_NEARMV and NEAR_NEWMV extended compound modes + int skip_ext_comp_nearmv_mode; + + // Skip extended compound mode when ref frame corresponding to NEWMV does not + // have NEWMV as single mode winner. + // 0 : no pruning + // 1 : prune extended compound mode (less aggressiveness) + // 2 : prune extended compound mode (high aggressiveness) + int prune_comp_using_best_single_mode_ref; + + // Skip NEARESTMV and NEARMV using weight computed in ref mv list population + // + // Pruning is enabled only when both the top and left neighbor blocks are + // available and when the current block already has a valid inter prediction. + int prune_nearest_near_mv_using_refmv_weight; + + // Based on previous ref_mv_idx search result, prune the following search. + int prune_ref_mv_idx_search; + + // Disable one sided compound modes. + int disable_onesided_comp; + + // Prune obmc search using previous frame stats. + // INT_MAX : disable obmc search + int prune_obmc_prob_thresh; + + // Prune warped motion search using previous frame stats. + int prune_warped_prob_thresh; + + // Variance threshold to enable/disable Interintra wedge search + unsigned int disable_interintra_wedge_var_thresh; + + // Variance threshold to enable/disable Interinter wedge search + unsigned int disable_interinter_wedge_var_thresh; + + // De-couple wedge and mode search during interintra RDO. + int fast_interintra_wedge_search; + + // Whether fast wedge sign estimate is used + int fast_wedge_sign_estimate; + + // Enable/disable ME for interinter wedge search. + int disable_interinter_wedge_newmv_search; + + // Decide when and how to use joint_comp. + DIST_WTD_COMP_FLAG use_dist_wtd_comp_flag; + + // Clip the frequency of updating the mv cost. + INTERNAL_COST_UPDATE_TYPE mv_cost_upd_level; + + // Clip the frequency of updating the coeff cost. + INTERNAL_COST_UPDATE_TYPE coeff_cost_upd_level; + + // Clip the frequency of updating the mode cost. + INTERNAL_COST_UPDATE_TYPE mode_cost_upd_level; + + // Prune inter modes based on tpl stats + // 0 : no pruning + // 1 - 3 indicate increasing aggressiveness in order. + int prune_inter_modes_based_on_tpl; + + // Skip NEARMV and NEAR_NEARMV modes using ref frames of above and left + // neighbor blocks and qindex. + PRUNE_NEARMV_LEVEL prune_nearmv_using_neighbors; + + // Model based breakout after interpolation filter search + // 0: no breakout + // 1: use model based rd breakout + int model_based_post_interp_filter_breakout; + + // Reuse compound type rd decision when exact match is found + // 0: No reuse + // 1: Reuse the compound type decision + int reuse_compound_type_decision; + + // Enable/disable masked compound. + int disable_masked_comp; + + // Enable/disable MV refinement for compound modes corresponds to compound + // types COMPOUND_AVERAGE, COMPOUND_DISTWTD (currently, this compound type + // is disabled for speeds >= 2 using the sf 'use_dist_wtd_comp_flag') and + // COMPOUND_DIFFWTD based on the availability. Levels 0 to 3 indicate + // increasing order of aggressiveness to disable MV refinement. + // 0: MV Refinement is enabled and for NEW_NEWMV mode used two iterations of + // refinement in av1_joint_motion_search(). + // 1: MV Refinement is disabled for COMPOUND_DIFFWTD and enabled for + // COMPOUND_AVERAGE & COMPOUND_DISTWTD. + // 2: MV Refinement is enabled for COMPOUND_AVERAGE & COMPOUND_DISTWTD for + // NEW_NEWMV mode with one iteration of refinement in + // av1_joint_motion_search() and MV Refinement is disabled for other compound + // type modes. + // 3: MV Refinement is disabled. + int enable_fast_compound_mode_search; + + // Reuse masked compound type search results + int reuse_mask_search_results; + + // Enable/disable fast search for wedge masks + int enable_fast_wedge_mask_search; + + // Early breakout from transform search of inter modes + int inter_mode_txfm_breakout; + + // Limit number of inter modes for txfm search if a newmv mode gets + // evaluated among the top modes. + // 0: no pruning + // 1 to 3 indicate increasing order of aggressiveness + int limit_inter_mode_cands; + + // Cap the no. of txfm searches for a given prediction mode. + // 0: no cap, 1: cap beyond first 4 searches, 2: cap beyond first 3 searches. + int limit_txfm_eval_per_mode; + + // Prune warped motion search based on block size. + int extra_prune_warped; + + // Do not search compound modes for ARF. + // The intuition is that ARF is predicted by frames far away from it, + // whose temporal correlations with the ARF are likely low. + // It is therefore likely that compound modes do not work as well for ARF + // as other inter frames. + // Speed/quality impact: + // Speed 1: 12% faster, 0.1% psnr loss. + // Speed 2: 2% faster, 0.05% psnr loss. + // No change for speed 3 and up, because |disable_onesided_comp| is true. + int skip_arf_compound; +} INTER_MODE_SPEED_FEATURES; + +typedef struct INTERP_FILTER_SPEED_FEATURES { + // Do limited interpolation filter search for dual filters, since best choice + // usually includes EIGHTTAP_REGULAR. + int use_fast_interpolation_filter_search; + + // Disable dual filter + int disable_dual_filter; + + // Save results of av1_interpolation_filter_search for a block + // Check mv and ref_frames before search, if they are very close with previous + // saved results, filter search can be skipped. + int use_interp_filter; + + // skip sharp_filter evaluation based on regular and smooth filter rd for + // dual_filter=0 case + int skip_sharp_interp_filter_search; + + // skip interpolation filter search for a block in chessboard pattern + int cb_pred_filter_search; + + // adaptive interp_filter search to allow skip of certain filter types. + int adaptive_interp_filter_search; + + // Forces interpolation filter to EIGHTTAP_REGULAR and skips interpolation + // filter search. + int skip_interp_filter_search; +} INTERP_FILTER_SPEED_FEATURES; + +typedef struct INTRA_MODE_SPEED_FEATURES { + // These bit masks allow you to enable or disable intra modes for each + // transform size separately. + int intra_y_mode_mask[TX_SIZES]; + int intra_uv_mode_mask[TX_SIZES]; + + // flag to allow skipping intra mode for inter frame prediction + int skip_intra_in_interframe; + + // Prune intra mode candidates based on source block histogram of gradient. + // Applies to luma plane only. + // Feasible values are 0..4. The feature is disabled for 0. An increasing + // value indicates more aggressive pruning threshold. + int intra_pruning_with_hog; + + // Prune intra mode candidates based on source block histogram of gradient. + // Applies to chroma plane only. + // Feasible values are 0..4. The feature is disabled for 0. An increasing + // value indicates more aggressive pruning threshold. + int chroma_intra_pruning_with_hog; + + // Enable/disable smooth intra modes. + int disable_smooth_intra; + + // Prune UV_SMOOTH_PRED mode for chroma based on chroma source variance. + // false : No pruning + // true : Prune UV_SMOOTH_PRED mode based on chroma source variance + // + // For allintra encode, this speed feature reduces instruction count + // by 1.90%, 2.21% and 1.97% for speed 6, 7 and 8 with coding performance + // change less than 0.04%. For AVIF image encode, this speed feature reduces + // encode time by 1.56%, 2.14% and 0.90% for speed 6, 7 and 8 on a typical + // image dataset with coding performance change less than 0.05%. + bool prune_smooth_intra_mode_for_chroma; + + // Prune filter intra modes in intra frames. + // 0 : No pruning + // 1 : Evaluate applicable filter intra modes based on best intra mode so far + // 2 : Do not evaluate filter intra modes + int prune_filter_intra_level; + + // prune palette search + // 0: No pruning + // 1: Perform coarse search to prune the palette colors. For winner colors, + // neighbors are also evaluated using a finer search. + // 2: Perform 2 way palette search from max colors to min colors (and min + // colors to remaining colors) and terminate the search if current number of + // palette colors is not the winner. + int prune_palette_search_level; + + // Terminate early in luma palette_size search. Speed feature values indicate + // increasing level of pruning. + // 0: No early termination + // 1: Terminate early for higher luma palette_size, if header rd cost of lower + // palette_size is more than 2 * best_rd. This level of pruning is more + // conservative when compared to sf level 2 as the cases which will get pruned + // with sf level 1 is a subset of the cases which will get pruned with sf + // level 2. + // 2: Terminate early for higher luma palette_size, if header rd cost of lower + // palette_size is more than best_rd. + // For allintra encode, this sf reduces instruction count by 2.49%, 1.07%, + // 2.76%, 2.30%, 1.84%, 2.69%, 2.04%, 2.05% and 1.44% for speed 0, 1, 2, 3, 4, + // 5, 6, 7 and 8 on screen content set with coding performance change less + // than 0.01% for speed <= 2 and less than 0.03% for speed >= 3. For AVIF + // image encode, this sf reduces instruction count by 1.94%, 1.13%, 1.29%, + // 0.93%, 0.89%, 1.03%, 1.07%, 1.20% and 0.18% for speed 0, 1, 2, 3, 4, 5, 6, + // 7 and 8 on a typical image dataset with coding performance change less than + // 0.01%. + int prune_luma_palette_size_search_level; + + // Prune chroma intra modes based on luma intra mode winner. + // 0: No pruning + // 1: Prune chroma intra modes other than UV_DC_PRED, UV_SMOOTH_PRED, + // UV_CFL_PRED and the mode that corresponds to luma intra mode winner. + int prune_chroma_modes_using_luma_winner; + + // Clip the frequency of updating the mv cost for intrabc. + INTERNAL_COST_UPDATE_TYPE dv_cost_upd_level; + + // We use DCT_DCT transform followed by computing SATD (Sum of Absolute + // Transformed Differences) as an estimation of RD score to quickly find the + // best possible Chroma from Luma (CFL) parameter. Then we do a full RD search + // near the best possible parameter. The search range is set here. + // The range of cfl_searh_range should be [1, 33], and the following are the + // recommended values. + // 1: Fastest mode. + // 3: Default mode that provides good speedup without losing compression + // performance at speed 0. + // 33: Exhaustive rd search (33 == CFL_MAGS_SIZE). This mode should only + // be used for debugging purpose. + int cfl_search_range; + + // TOP_INTRA_MODEL_COUNT is 4 that is the number of top model rd to store in + // intra mode decision. Here, add a speed feature to reduce this number for + // higher speeds. + int top_intra_model_count_allowed; + + // Adapt top_intra_model_count_allowed locally to prune luma intra modes using + // neighbor block and quantizer information. + int adapt_top_model_rd_count_using_neighbors; + + // Prune the evaluation of odd delta angles of directional luma intra modes by + // using the rdcosts of neighbouring delta angles. + // For allintra encode, this speed feature reduces instruction count + // by 4.461%, 3.699% and 3.536% for speed 6, 7 and 8 on a typical video + // dataset with coding performance change less than 0.26%. For AVIF image + // encode, this speed feature reduces encode time by 2.849%, 2.471%, + // and 2.051% for speed 6, 7 and 8 on a typical image dataset with coding + // performance change less than 0.27%. + int prune_luma_odd_delta_angles_in_intra; + + // Terminate early in chroma palette_size search. + // 0: No early termination + // 1: Terminate early for higher palette_size, if header rd cost of lower + // palette_size is more than best_rd. + // For allintra encode, this sf reduces instruction count by 0.45%, + // 0.62%, 1.73%, 2.50%, 2.89%, 3.09% and 3.86% for speed 0 to 6 on screen + // content set with coding performance change less than 0.01%. + // For AVIF image encode, this sf reduces instruction count by 0.45%, 0.81%, + // 0.85%, 1.05%, 1.45%, 1.66% and 1.95% for speed 0 to 6 on a typical image + // dataset with no quality drop. + int early_term_chroma_palette_size_search; + + // Skips the evaluation of filter intra modes in inter frames if rd evaluation + // of luma intra dc mode results in invalid rd stats. + int skip_filter_intra_in_inter_frames; +} INTRA_MODE_SPEED_FEATURES; + +typedef struct TX_SPEED_FEATURES { + // Init search depth for square and rectangular transform partitions. + // Values: + // 0 - search full tree, 1: search 1 level, 2: search the highest level only + int inter_tx_size_search_init_depth_sqr; + int inter_tx_size_search_init_depth_rect; + int intra_tx_size_search_init_depth_sqr; + int intra_tx_size_search_init_depth_rect; + + // If any dimension of a coding block size above 64, always search the + // largest transform only, since the largest transform block size is 64x64. + int tx_size_search_lgr_block; + + TX_TYPE_SEARCH tx_type_search; + + // Skip split transform block partition when the collocated bigger block + // is selected as all zero coefficients. + int txb_split_cap; + + // Shortcut the transform block partition and type search when the target + // rdcost is relatively lower. + // Values are 0 (not used) , or 1 - 2 with progressively increasing + // aggressiveness + int adaptive_txb_search_level; + + // Prune level for tx_size_type search for inter based on rd model + // 0: no pruning + // 1-2: progressively increasing aggressiveness of pruning + int model_based_prune_tx_search_level; + + // Refine TX type after fast TX search. + int refine_fast_tx_search_results; + + // Prune transform split/no_split eval based on residual properties. A value + // of 0 indicates no pruning, and the aggressiveness of pruning progressively + // increases from levels 1 to 3. + int prune_tx_size_level; + + // Prune the evaluation of transform depths as decided by the NN model. + // false: No pruning. + // true : Avoid the evaluation of specific transform depths using NN model. + // + // For allintra encode, this speed feature reduces instruction count + // by 4.76%, 8.92% and 11.28% for speed 6, 7 and 8 with coding performance + // change less than 0.32%. For AVIF image encode, this speed feature reduces + // encode time by 4.65%, 9.16% and 10.45% for speed 6, 7 and 8 on a typical + // image dataset with coding performance change less than 0.19%. + bool prune_intra_tx_depths_using_nn; + + // Enable/disable early breakout during transform search of intra modes, by + // using the minimum rd cost possible. By using this approach, the rd + // evaluation of applicable transform blocks (in the current block) can be + // avoided as + // 1) best_rd evolves during the search in choose_tx_size_type_from_rd() + // 2) appropriate ref_best_rd is passed in intra_block_yrd() + // + // For allintra encode, this speed feature reduces instruction count + // by 1.11%, 1.08%, 1.02% and 0.93% for speed 3, 6, 7 and 8 with coding + // performance change less than 0.02%. For AVIF image encode, this speed + // feature reduces encode time by 0.93%, 1.46%, 1.07%, 0.84%, 0.99% and 0.73% + // for speed 3, 4, 5, 6, 7 and 8 on a typical image dataset with coding + // performance change less than 0.004%. + bool use_rd_based_breakout_for_intra_tx_search; +} TX_SPEED_FEATURES; + +typedef struct RD_CALC_SPEED_FEATURES { + // Fast approximation of av1_model_rd_from_var_lapndz + int simple_model_rd_from_var; + + // Perform faster distortion computation during the R-D evaluation by trying + // to approximate the prediction error with transform coefficients (faster but + // less accurate) rather than computing distortion in the pixel domain (slower + // but more accurate). The following methods are used for distortion + // computation: + // Method 0: Always compute distortion in the pixel domain + // Method 1: Based on block error, try using transform domain distortion for + // tx_type search and compute distortion in pixel domain for final RD_STATS + // Method 2: Based on block error, try to compute distortion in transform + // domain + // Methods 1 and 2 may fallback to computing distortion in the pixel domain in + // case the block error is less than the threshold, which is controlled by the + // speed feature tx_domain_dist_thres_level. + // + // The speed feature tx_domain_dist_level decides which of the above methods + // needs to be used across different mode evaluation stages as described + // below: + // Eval type: Default Mode Winner + // Level 0 : Method 0 Method 2 Method 0 + // Level 1 : Method 1 Method 2 Method 0 + // Level 2 : Method 2 Method 2 Method 0 + // Level 3 : Method 2 Method 2 Method 2 + int tx_domain_dist_level; + + // Transform domain distortion threshold level + int tx_domain_dist_thres_level; + + // Trellis (dynamic programming) optimization of quantized values + TRELLIS_OPT_TYPE optimize_coefficients; + + // Use hash table to store macroblock RD search results + // to avoid repeated search on the same residue signal. + int use_mb_rd_hash; + + // Flag used to control the extent of coeff R-D optimization + int perform_coeff_opt; +} RD_CALC_SPEED_FEATURES; + +typedef struct WINNER_MODE_SPEED_FEATURES { + // Flag used to control the winner mode processing for better R-D optimization + // of quantized coeffs + int enable_winner_mode_for_coeff_opt; + + // Flag used to control the winner mode processing for transform size + // search method + int enable_winner_mode_for_tx_size_srch; + + // Control transform size search level + // Eval type: Default Mode Winner + // Level 0 : FULL RD LARGEST ALL FULL RD + // Level 1 : FAST RD LARGEST ALL FULL RD + // Level 2 : LARGEST ALL LARGEST ALL FULL RD + // Level 3 : LARGEST ALL LARGEST ALL LARGEST ALL + int tx_size_search_level; + + // Flag used to control the winner mode processing for use transform + // domain distortion + int enable_winner_mode_for_use_tx_domain_dist; + + // Flag used to enable processing of multiple winner modes + MULTI_WINNER_MODE_TYPE multi_winner_mode_type; + + // Motion mode for winner candidates: + // 0: speed feature OFF + // 1 / 2 : Use configured number of winner candidates + int motion_mode_for_winner_cand; + + // Controls the prediction of transform skip block or DC only block. + // + // Different speed feature values (0 to 3) decide the aggressiveness of + // prediction (refer to predict_dc_levels[][] in speed_features.c) to be used + // during different mode evaluation stages. + int dc_blk_pred_level; + + // If on, disables interpolation filter search in handle_inter_mode loop, and + // performs it during winner mode processing by \ref + // tx_search_best_inter_candidates. + int winner_mode_ifs; + + // Controls the disabling of winner mode processing. Speed feature levels + // are ordered in increasing aggressiveness of pruning. The method considered + // for disabling, depends on the sf level value and it is described as below. + // 0: Do not disable + // 1: Disable for blocks with low source variance. + // 2: Disable for blocks which turn out to be transform skip (skipped based on + // eob) during MODE_EVAL stage except NEWMV mode. + // 3: Disable for blocks which turn out to be transform skip during MODE_EVAL + // stage except NEWMV mode. For high quantizers, prune conservatively based on + // transform skip (skipped based on eob) except for NEWMV mode. + // 4: Disable for blocks which turn out to be transform skip during MODE_EVAL + // stage. + int prune_winner_mode_eval_level; +} WINNER_MODE_SPEED_FEATURES; + +typedef struct LOOP_FILTER_SPEED_FEATURES { + // This feature controls how the loop filter level is determined. + LPF_PICK_METHOD lpf_pick; + + // Skip some final iterations in the determination of the best loop filter + // level. + int use_coarse_filter_level_search; + + // Control how the CDEF strength is determined. + CDEF_PICK_METHOD cdef_pick_method; + + // Decoder side speed feature to add penalty for use of dual-sgr filters. + // Takes values 0 - 10, 0 indicating no penalty and each additional level + // adding a penalty of 1% + int dual_sgr_penalty_level; + + // prune sgr ep using binary search like mechanism + int enable_sgr_ep_pruning; + + // Disable loop restoration for Chroma plane + int disable_loop_restoration_chroma; + + // Disable loop restoration for luma plane + int disable_loop_restoration_luma; + + // Range of loop restoration unit sizes to search + // The minimum size is clamped against the superblock size in + // av1_pick_filter_restoration, so that the code which sets this value does + // not need to know the superblock size ahead of time. + int min_lr_unit_size; + int max_lr_unit_size; + + // Prune RESTORE_WIENER evaluation based on source variance + // 0 : no pruning + // 1 : conservative pruning + // 2 : aggressive pruning + int prune_wiener_based_on_src_var; + + // Prune self-guided loop restoration based on wiener search results + // 0 : no pruning + // 1 : pruning based on rdcost ratio of RESTORE_WIENER and RESTORE_NONE + // 2 : pruning based on winner restoration type among RESTORE_WIENER and + // RESTORE_NONE + int prune_sgr_based_on_wiener; + + // Reduce the wiener filter win size for luma + int reduce_wiener_window_size; + + // Flag to disable Wiener Loop restoration filter. + bool disable_wiener_filter; + + // Flag to disable Self-guided Loop restoration filter. + bool disable_sgr_filter; + + // Disable the refinement search around the wiener filter coefficients. + bool disable_wiener_coeff_refine_search; + + // Whether to downsample the rows in computation of wiener stats. + int use_downsampled_wiener_stats; +} LOOP_FILTER_SPEED_FEATURES; + +typedef struct REAL_TIME_SPEED_FEATURES { + // check intra prediction for non-RD mode. + int check_intra_pred_nonrd; + + // Skip checking intra prediction. + // 0 - don't skip + // 1 - skip if TX is skipped and best mode is not NEWMV + // 2 - skip if TX is skipped + // Skipping aggressiveness increases from level 1 to 2. + int skip_intra_pred; + + // Estimate motion before calculating variance in variance-based partition + // 0 - Only use zero MV + // 1 - perform coarse ME + // 2 - perform coarse ME, and also use neighbours' MVs + // 3 - use neighbours' MVs without performing coarse ME + int estimate_motion_for_var_based_partition; + + // For nonrd_use_partition: mode of extra check of leaf partition + // 0 - don't check merge + // 1 - always check merge + // 2 - check merge and prune checking final split + // 3 - check merge and prune checking final split based on bsize and qindex + int nonrd_check_partition_merge_mode; + + // For nonrd_use_partition: check of leaf partition extra split + int nonrd_check_partition_split; + + // Implements various heuristics to skip searching modes + // The heuristics selected are based on flags + // defined in the MODE_SEARCH_SKIP_HEURISTICS enum + unsigned int mode_search_skip_flags; + + // For nonrd: Reduces ref frame search. + // 0 - low level of search prune in non last frames + // 1 - pruned search in non last frames + // 2 - more pruned search in non last frames + int nonrd_prune_ref_frame_search; + + // This flag controls the use of non-RD mode decision. + int use_nonrd_pick_mode; + + // Use ALTREF frame in non-RD mode decision. + int use_nonrd_altref_frame; + + // Use compound reference for non-RD mode. + int use_comp_ref_nonrd; + + // Reference frames for compound prediction for nonrd pickmode: + // LAST_GOLDEN (0), LAST_LAST2 (1), or LAST_ALTREF (2). + int ref_frame_comp_nonrd[3]; + + // use reduced ref set for real-time mode + int use_real_time_ref_set; + + // Skip a number of expensive mode evaluations for blocks with very low + // temporal variance. + int short_circuit_low_temp_var; + + // Reuse inter prediction in fast non-rd mode. + int reuse_inter_pred_nonrd; + + // Number of best inter modes to search transform. INT_MAX - search all. + int num_inter_modes_for_tx_search; + + // Use interpolation filter search in non-RD mode decision. + int use_nonrd_filter_search; + + // Use simplified RD model for interpolation search and Intra + int use_simple_rd_model; + + // For nonrd mode: use hybrid intra mode search for intra only frames based on + // block properties. + // 0 : use nonrd pick intra for all blocks + // 1 : use rd for bsize < 16x16, nonrd otherwise + // 2 : use rd for bsize < 16x16 and src var >= 101, nonrd otherwise + int hybrid_intra_pickmode; + + // Compute variance/sse on source difference, prior to encoding superblock. + int source_metrics_sb_nonrd; + + // Flag to indicate process for handling overshoot on slide/scene change, + // for real-time CBR mode. + OVERSHOOT_DETECTION_CBR overshoot_detection_cbr; + + // Check for scene/content change detection on every frame before encoding. + int check_scene_detection; + + // For nonrd mode: Prefer larger partition blks in variance based partitioning + // 0: disabled, 1-3: increasing aggressiveness + int prefer_large_partition_blocks; + + // uses results of temporal noise estimate + int use_temporal_noise_estimate; + + // Parameter indicating initial search window to be used in full-pixel search + // for nonrd_pickmode. Range [0, MAX_MVSEARCH_STEPS - 1]. Lower value + // indicates larger window. If set to 0, step_param is set based on internal + // logic in set_mv_search_params(). + int fullpel_search_step_param; + + // Bit mask to enable or disable intra modes for each prediction block size + // separately, for nonrd_pickmode. Currently, the sf is not respected when + // 'force_intra_check' is true in 'av1_estimate_intra_mode()' function. Also, + // H and V pred modes allowed through this sf can be further pruned when + //'prune_hv_pred_modes_using_src_sad' sf is true. + int intra_y_mode_bsize_mask_nrd[BLOCK_SIZES]; + + // Prune H and V intra predition modes evalution in inter frame. + // The sf does not have any impact. + // i. when frame_source_sad is 1.1 times greater than avg_source_sad + // ii. when cyclic_refresh_segment_id_boosted is enabled + // iii. when SB level source sad is greater than kMedSad + // iv. when color sensitivity is non zero for both the chroma channels + bool prune_hv_pred_modes_using_src_sad; + + // Skips mode checks more aggressively in nonRD mode + int nonrd_aggressive_skip; + + // Skip cdef on 64x64 blocks/ + // 0: disabled + // 1: skip when NEWMV or INTRA is not picked or color sensitivity is off. + // When color sensitivity is on for a superblock, all 64x64 blocks within + // will not skip. + // 2: more aggressive mode where skip is done for all frames where + // rc->high_source_sad = 0 (non slide-changes), and color sensitivity off. + int skip_cdef_sb; + + // Force selective cdf update. + int selective_cdf_update; + + // Force only single reference (LAST) for prediction. + int force_only_last_ref; + + // Forces larger partition blocks in variance based partitioning for intra + // frames + int force_large_partition_blocks_intra; + + // Use fixed partition for superblocks based on source_sad. + // 0: disabled + // 1: enabled + int use_fast_fixed_part; + + // Increase source_sad thresholds in nonrd pickmode. + int increase_source_sad_thresh; + + // Skip evaluation of no split in tx size selection for merge partition + int skip_tx_no_split_var_based_partition; + + // Intermediate termination of newMV mode evaluation based on so far best mode + // sse + int skip_newmv_mode_based_on_sse; + + // Define gf length multiplier. + // Level 0: use large multiplier, level 1: use medium multiplier. + int gf_length_lvl; + + // Prune inter modes with golden frame as reference for NEARMV and NEWMV modes + int prune_inter_modes_with_golden_ref; + + // Prune inter modes w.r.t golden or alt-ref frame based on sad + int prune_inter_modes_wrt_gf_arf_based_on_sad; + + // Prune inter mode search in rd path based on current block's temporal + // variance wrt LAST reference. + int prune_inter_modes_using_temp_var; + + // Reduce MV precision to halfpel for higher int MV value & frame-level motion + // 0: disabled + // 1-2: Reduce precision to halfpel, fullpel based on conservative + // thresholds, aggressiveness increases with increase in level + // 3: Reduce precision to halfpel using more aggressive thresholds + int reduce_mv_pel_precision_highmotion; + + // Reduce MV precision for low complexity blocks + // 0: disabled + // 1: Reduce the mv resolution for zero mv if the variance is low + // 2: Switch to halfpel, fullpel based on low block spatial-temporal + // complexity. + int reduce_mv_pel_precision_lowcomplex; + + // Prune intra mode evaluation in inter frames based on mv range. + BLOCK_SIZE prune_intra_mode_based_on_mv_range; + // The number of times to left shift the splitting thresholds in variance + // based partitioning. The minimum values should be 7 to avoid left shifting + // by a negative number. + int var_part_split_threshold_shift; + + // Qindex based variance partition threshold index, which determines + // the aggressiveness of partition pruning + // 0: disabled for speeds 9,10 + // 1,2: (rd-path) lowers qindex thresholds conditionally (for low SAD sb) + // 3,4: (non-rd path) uses pre-tuned qindex thresholds + int var_part_based_on_qidx; + + // Enable GF refresh based on Q value. + int gf_refresh_based_on_qp; + + // Temporal filtering + // The value can be 1 or 2, which indicates the threshold to use. + // Must be off for lossless mode. + int use_rtc_tf; + + // Prune the use of the identity transform in nonrd_pickmode, + // used for screen content mode: only for smaller blocks + // and higher spatial variance, and when skip_txfm is not + // already set. + int prune_idtx_nonrd; + + // Prune the use of paletter mode in nonrd pickmode. + int prune_palette_nonrd; + + // Force to only use dct for palette search in nonrd pickmode. + int dct_only_palette_nonrd; + + // Skip loopfilter, for static content after slide change + // or key frame, once quality has ramped up. + // 0: disabled + // 1: skip only after quality is ramped up. + // 2: aggrssive mode, where skip is done for all frames that + // where rc->high_source_sad = 0 (no slide-changes). + int skip_lf_screen; + + // For nonrd: early exit out of variance partition that sets the + // block size to superblock size, and sets mode to zeromv-last skip. + // 0: disabled + // 1: zeromv-skip is enabled at SB level only + // 2: zeromv-skip is enabled at SB level and coding block level + int part_early_exit_zeromv; + + // Early terminate inter mode search based on sse in non-rd path. + INTER_SEARCH_EARLY_TERM_IDX sse_early_term_inter_search; + + // SAD based adaptive altref selection + int sad_based_adp_altref_lag; + + // Enable/disable partition direct merging. + int partition_direct_merging; + + // Level of aggressiveness for obtaining tx size based on qstep + int tx_size_level_based_on_qstep; + + // Avoid the partitioning of a 16x16 block in variance based partitioning + // (VBP) by making use of minimum and maximum sub-block variances. + // For allintra encode, this speed feature reduces instruction count by 5.39% + // for speed 9 on a typical video dataset with coding performance gain + // of 1.44%. + // For AVIF image encode, this speed feature reduces encode time + // by 8.44% for speed 9 on a typical image dataset with coding performance + // gain of 0.78%. + bool vbp_prune_16x16_split_using_min_max_sub_blk_var; + + // A qindex threshold that determines whether to use qindex based CDEF filter + // strength estimation for screen content types. The strength estimation model + // used for screen contents prefers to allow cdef filtering for more frames. + // This sf is used to limit the frames which go through cdef filtering and + // following explains the setting of the same. + // MAXQ (255): This disables the usage of this sf. Here, frame does not use a + // screen content model thus reduces the number of frames that go through cdef + // filtering. + // MINQ (0): Frames always use screen content model thus increasing the number + // of frames that go through cdef filtering. + // This speed feature has a substantial gain on coding metrics, with moderate + // increase encoding time. Select threshold based on speed vs quality + // trade-off. + int screen_content_cdef_filter_qindex_thresh; + + // Prune compound mode if its variance is higher than the variance of single + // modes. + bool prune_compoundmode_with_singlecompound_var; + + // Allow mode cost update at frame level every couple frames. This + // overrides the command line setting --mode-cost-upd-freq=3 (never update + // except on key frame and first delta). + bool frame_level_mode_cost_update; + + // Prune H_PRED during intra mode evaluation in the nonrd path based on best + // mode so far. + // + // For allintra encode, this speed feature reduces instruction count by 1.10% + // for speed 9 with coding performance change less than 0.04%. + // For AVIF image encode, this speed feature reduces encode time by 1.03% for + // speed 9 on a typical image dataset with coding performance change less than + // 0.08%. + bool prune_h_pred_using_best_mode_so_far; + + // Enable pruning of intra mode evaluations in nonrd path based on source + // variance and best mode so far. The pruning logic is enabled only if the + // mode is not a winner mode of both the neighboring blocks (left/top). + // + // For allintra encode, this speed feature reduces instruction count by 3.96% + // for speed 9 with coding performance change less than 0.38%. + // For AVIF image encode, this speed feature reduces encode time by 3.46% for + // speed 9 on a typical image dataset with coding performance change less than + // -0.06%. + bool enable_intra_mode_pruning_using_neighbors; + + // Prune intra mode evaluations in nonrd path based on best sad so far. + // + // For allintra encode, this speed feature reduces instruction count by 3.05% + // for speed 9 with coding performance change less than 0.24%. + // For AVIF image encode, this speed feature reduces encode time by 1.87% for + // speed 9 on a typical image dataset with coding performance change less than + // 0.16%. + bool prune_intra_mode_using_best_sad_so_far; + + // If compound is enabled, and the current block size is \geq BLOCK_16X16, + // limit the compound modes to GLOBAL_GLOBALMV. This does not apply to the + // base layer of svc. + bool check_only_zero_zeromv_on_large_blocks; + + // Allow for disabling cdf update for non reference frames in svc mode. + bool disable_cdf_update_non_reference_frame; + + // Prune compound modes if the single modes variances do not perform well. + bool prune_compoundmode_with_singlemode_var; + + // Skip searching all compound mode if the variance of single_mode residue is + // sufficiently low. + bool skip_compound_based_on_var; + + // Sets force_zeromv_skip based on the source sad available. Aggressiveness + // increases with increase in the level set for speed feature. + // 0: No setting + // 1: If source sad is kZeroSad + // 2: If source sad <= kVeryLowSad + int set_zeromv_skip_based_on_source_sad; + + // Downgrades the block-level subpel motion search to + // av1_find_best_sub_pixel_tree_pruned_more for higher QP and when fullpel + // search performed well, zeromv has low sad or low source_var + bool use_adaptive_subpel_search; + + // A flag used in RTC case to control frame_refs_short_signaling. Note that + // the final decision is made in check_frame_refs_short_signaling(). The flag + // can only be turned on when res < 360p and speed >= 9, in which case only + // LAST and GOLDEN ref frames are used now. + bool enable_ref_short_signaling; + + // A flag that controls if we check or bypass GLOBALMV in rtc single ref frame + // case. + bool check_globalmv_on_single_ref; + + // Allows for increasing the color_threshold for palette prediction. + // This generally leads to better coding efficiency but with some speed loss. + // Only used for screen content and for nonrd_pickmode. + bool increase_color_thresh_palette; +} REAL_TIME_SPEED_FEATURES; + +/*!\endcond */ + +/*! + * \brief Top level speed vs quality trade off data struture. + */ +typedef struct SPEED_FEATURES { + /*! + * Sequence/frame level speed features: + */ + HIGH_LEVEL_SPEED_FEATURES hl_sf; + + /*! + * Speed features for the first pass. + */ + FIRST_PASS_SPEED_FEATURES fp_sf; + + /*! + * Speed features related to how tpl's searches are done. + */ + TPL_SPEED_FEATURES tpl_sf; + + /*! + * Global motion speed features: + */ + GLOBAL_MOTION_SPEED_FEATURES gm_sf; + + /*! + * Partition search speed features: + */ + PARTITION_SPEED_FEATURES part_sf; + + /*! + * Motion search speed features: + */ + MV_SPEED_FEATURES mv_sf; + + /*! + * Inter mode search speed features: + */ + INTER_MODE_SPEED_FEATURES inter_sf; + + /*! + * Interpolation filter search speed features: + */ + INTERP_FILTER_SPEED_FEATURES interp_sf; + + /*! + * Intra mode search speed features: + */ + INTRA_MODE_SPEED_FEATURES intra_sf; + + /*! + * Transform size/type search speed features: + */ + TX_SPEED_FEATURES tx_sf; + + /*! + * RD calculation speed features: + */ + RD_CALC_SPEED_FEATURES rd_sf; + + /*! + * Two-pass mode evaluation features: + */ + WINNER_MODE_SPEED_FEATURES winner_mode_sf; + + /*! + * In-loop filter speed features: + */ + LOOP_FILTER_SPEED_FEATURES lpf_sf; + + /*! + * Real-time mode speed features: + */ + REAL_TIME_SPEED_FEATURES rt_sf; +} SPEED_FEATURES; +/*!\cond */ + +struct AV1_COMP; + +/*!\endcond */ +/*!\brief Frame size independent speed vs quality trade off flags + * + *\ingroup speed_features + * + * \param[in] cpi Top - level encoder instance structure + * \param[in] speed Speed setting passed in from the command line + * + * \remark No return value but configures the various speed trade off flags + * based on the passed in speed setting. (Higher speed gives lower + * quality) + */ +void av1_set_speed_features_framesize_independent(struct AV1_COMP *cpi, + int speed); + +/*!\brief Frame size dependent speed vs quality trade off flags + * + *\ingroup speed_features + * + * \param[in] cpi Top - level encoder instance structure + * \param[in] speed Speed setting passed in from the command line + * + * \remark No return value but configures the various speed trade off flags + * based on the passed in speed setting and frame size. (Higher speed + * corresponds to lower quality) + */ +void av1_set_speed_features_framesize_dependent(struct AV1_COMP *cpi, + int speed); +/*!\brief Q index dependent speed vs quality trade off flags + * + *\ingroup speed_features + * + * \param[in] cpi Top - level encoder instance structure + * \param[in] speed Speed setting passed in from the command line + * + * \remark No return value but configures the various speed trade off flags + * based on the passed in speed setting and current frame's Q index. + * (Higher speed corresponds to lower quality) + */ +void av1_set_speed_features_qindex_dependent(struct AV1_COMP *cpi, int speed); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // AOM_AV1_ENCODER_SPEED_FEATURES_H_ |