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/*
* 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;
// Downsampling pyramid level to use for global motion estimation
int downsample_level;
// 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;
// Filter blocks by certain criteria such as SAD, source variance, such that
// fewer blocks will go through the palette search.
// For nonrd encoding path, enable this feature reduces encoding time when
// palette mode is used. Disabling it leads to better compression efficiency.
// 0: off
// 1: less aggressive pruning mode
// 2: more aggressive pruning mode
int prune_palette_search_nonrd;
// 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 keyframes in rtc: adjust the rc_bits_per_mb, to reduce overshoot.
int rc_adjust_keyframe;
// On scene change: compute spatial variance.
int rc_compute_spatial_var_sc;
// 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;
// Use of the identity transform in nonrd_pickmode,
int use_idtx_nonrd;
// Prune the use of the identity transform in nonrd_pickmode:
// only for smaller blocks and higher spatial variance, and when skip_txfm
// is not already set.
int prune_idtx_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;
// Threshold on the active/inactive region percent to disable
// the loopfilter and cdef. Setting to 100 disables this feature.
int thresh_active_maps_skip_lf_cdef;
// 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;
// Flag to indicate selecting of higher threshold for scenee change detection.
int higher_thresh_scene_detection;
// FLag to indicate skip testing of NEWMV for flat blocks.
int skip_newmv_flat_blocks_screen;
// Flag to force skip encoding for non_reference_frame on slide/scene changes.
int skip_encoding_non_reference_slide_change;
// Flag to indicate more aggressive QP downward adjustment for screen static
// content, to make convergence to min_qp faster.
int rc_faster_convergence_static;
} 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_