ref: 4a4ea28a3826d6a9843369bb8880cf49dc7c5dc0
dir: /vp9/encoder/vp9_speed_features.h/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef VPX_VP9_ENCODER_VP9_SPEED_FEATURES_H_
#define VPX_VP9_ENCODER_VP9_SPEED_FEATURES_H_
#include "vp9/common/vp9_enums.h"
#ifdef __cplusplus
extern "C" {
#endif
enum {
INTRA_ALL = (1 << DC_PRED) | (1 << V_PRED) | (1 << H_PRED) | (1 << D45_PRED) |
(1 << D135_PRED) | (1 << D117_PRED) | (1 << D153_PRED) |
(1 << D207_PRED) | (1 << D63_PRED) | (1 << TM_PRED),
INTRA_DC = (1 << DC_PRED),
INTRA_DC_TM = (1 << DC_PRED) | (1 << TM_PRED),
INTRA_DC_H_V = (1 << DC_PRED) | (1 << V_PRED) | (1 << H_PRED),
INTRA_DC_TM_H_V =
(1 << DC_PRED) | (1 << TM_PRED) | (1 << V_PRED) | (1 << H_PRED)
};
enum {
INTER_ALL = (1 << NEARESTMV) | (1 << NEARMV) | (1 << ZEROMV) | (1 << NEWMV),
INTER_NEAREST = (1 << NEARESTMV),
INTER_NEAREST_NEW = (1 << NEARESTMV) | (1 << NEWMV),
INTER_NEAREST_ZERO = (1 << NEARESTMV) | (1 << ZEROMV),
INTER_NEAREST_NEW_ZERO = (1 << NEARESTMV) | (1 << ZEROMV) | (1 << NEWMV),
INTER_NEAREST_NEAR_NEW = (1 << NEARESTMV) | (1 << NEARMV) | (1 << NEWMV),
INTER_NEAREST_NEAR_ZERO = (1 << NEARESTMV) | (1 << NEARMV) | (1 << ZEROMV),
};
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)
};
typedef enum {
DIAMOND = 0,
NSTEP = 1,
HEX = 2,
BIGDIA = 3,
SQUARE = 4,
FAST_HEX = 5,
FAST_DIAMOND = 6,
MESH = 7
} SEARCH_METHODS;
typedef enum {
// No recode.
DISALLOW_RECODE = 0,
// Allow recode for KF and exceeding maximum frame bandwidth.
ALLOW_RECODE_KFMAXBW = 1,
// Allow recode only for KF/ARF/GF frames.
ALLOW_RECODE_KFARFGF = 2,
// Allow recode for ARF/GF/KF and first normal frame in each group.
ALLOW_RECODE_FIRST = 3,
// Allow recode for all frames based on bitrate constraints.
ALLOW_RECODE = 4,
} RECODE_LOOP_TYPE;
typedef 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_TREE_PRUNED_EVENMORE = 3, // Prunes 1/2- and 1/4-pel searches
// Other methods to come
} SUBPEL_SEARCH_METHODS;
typedef enum {
NO_MOTION_THRESHOLD = 0,
LOW_MOTION_THRESHOLD = 7
} MOTION_THRESHOLD;
typedef enum {
USE_FULL_RD = 0,
USE_LARGESTALL,
USE_TX_8X8
} TX_SIZE_SEARCH_METHOD;
typedef enum {
NOT_IN_USE = 0,
RELAXED_NEIGHBORING_MIN_MAX = 1,
STRICT_NEIGHBORING_MIN_MAX = 2
} AUTO_MIN_MAX_MODE;
typedef enum {
// Try the full image with different values.
LPF_PICK_FROM_FULL_IMAGE,
// 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
} LPF_PICK_METHOD;
typedef 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,
} MODE_SEARCH_SKIP_LOGIC;
typedef enum {
FLAG_SKIP_EIGHTTAP = 1 << EIGHTTAP,
FLAG_SKIP_EIGHTTAP_SMOOTH = 1 << EIGHTTAP_SMOOTH,
FLAG_SKIP_EIGHTTAP_SHARP = 1 << EIGHTTAP_SHARP,
} INTERP_FILTER_MASK;
typedef enum {
// Search partitions using RD/NONRD criterion.
SEARCH_PARTITION,
// Always use a fixed size partition.
FIXED_PARTITION,
REFERENCE_PARTITION,
// Use an arbitrary partitioning scheme based on source variance within
// a 64X64 SB.
VAR_BASED_PARTITION,
// Use non-fixed partitions based on source variance.
SOURCE_VAR_BASED_PARTITION,
// Make partition decisions with machine learning models.
ML_BASED_PARTITION
} PARTITION_SEARCH_TYPE;
typedef enum {
// Does a dry run to see if any of the contexts need to be updated or not,
// before the final run.
TWO_LOOP = 0,
// No dry run, also only half the coef contexts and bands are updated.
// The rest are not updated at all.
ONE_LOOP_REDUCED = 1
} FAST_COEFF_UPDATE;
typedef enum { EIGHTH_PEL, QUARTER_PEL, HALF_PEL, FULL_PEL } SUBPEL_FORCE_STOP;
typedef struct ADAPT_SUBPEL_FORCE_STOP {
// Threshold for full pixel motion vector;
int mv_thresh;
// subpel_force_stop if full pixel MV is below the threshold.
SUBPEL_FORCE_STOP force_stop_below;
// subpel_force_stop if full pixel MV is equal to or above the threshold.
SUBPEL_FORCE_STOP force_stop_above;
} ADAPT_SUBPEL_FORCE_STOP;
typedef struct MV_SPEED_FEATURES {
// Motion search method (Diamond, NSTEP, Hex, Big Diamond, Square, etc).
SEARCH_METHODS search_method;
// This parameter controls which step in the n-step process we start at.
// It's changed adaptively based on circumstances.
int reduce_first_step_size;
// 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_METHODS subpel_search_method;
// Subpel MV search level. Can take values 0 - 2. Higher values mean more
// extensive subpel search.
int subpel_search_level;
// When to stop subpel motion search.
SUBPEL_FORCE_STOP subpel_force_stop;
// If it's enabled, different subpel_force_stop will be used for different MV.
int enable_adaptive_subpel_force_stop;
ADAPT_SUBPEL_FORCE_STOP adapt_subpel_force_stop;
// This variable sets the step_param used in full pel motion search.
int fullpel_search_step_param;
} MV_SPEED_FEATURES;
typedef struct PARTITION_SEARCH_BREAKOUT_THR {
int64_t dist;
int rate;
} PARTITION_SEARCH_BREAKOUT_THR;
#define MAX_MESH_STEP 4
typedef struct MESH_PATTERN {
int range;
int interval;
} MESH_PATTERN;
typedef enum {
// No reaction to rate control on a detected slide/scene change.
NO_DETECTION = 0,
// Set to larger Q (max_q set by user) based only on the
// detected slide/scene change and current/past Q.
FAST_DETECTION_MAXQ = 1,
// Based on (first pass) encoded frame, if large frame size is detected
// then set to higher Q for the second re-encode. This involves 2 pass
// encoding on slide change, so slower than 1, but more accurate for
// detecting overshoot.
RE_ENCODE_MAXQ = 2
} OVERSHOOT_DETECTION_CBR_RT;
typedef enum {
USE_2_TAPS = 0,
USE_4_TAPS,
USE_8_TAPS,
USE_8_TAPS_SHARP,
} SUBPEL_SEARCH_TYPE;
typedef struct SPEED_FEATURES {
MV_SPEED_FEATURES mv;
// Frame level coding parameter update
int frame_parameter_update;
RECODE_LOOP_TYPE recode_loop;
// Trellis (dynamic programming) optimization of quantized values (+1, 0).
int optimize_coefficients;
// 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;
// If 1 we iterate finding a best reference for 2 ref frames together - via
// a log search that iterates 4 times (check around mv for last for best
// error of combined predictor then check around mv for alt). If 0 we
// we just use the best motion vector found for each frame by itself.
BLOCK_SIZE comp_inter_joint_search_thresh;
// 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.
// Turned off when (row_mt_bit_exact == 1 && adaptive_rd_thresh_row_mt == 0).
int adaptive_rd_thresh;
// Flag to use adaptive_rd_thresh when row-mt it enabled, only for non-rd
// pickmode.
int adaptive_rd_thresh_row_mt;
// Enables skipping the reconstruction step (idct, recon) in the
// intermediate steps assuming the last frame didn't have too many intra
// blocks and the q is less than a threshold.
int skip_encode_sb;
int skip_encode_frame;
// Speed feature to allow or disallow skipping of recode at block
// level within a frame.
int allow_skip_recode;
// Coefficient probability model approximation step size
int coeff_prob_appx_step;
// Enable uniform quantizer followed by trellis coefficient optimization
int allow_quant_coeff_opt;
double quant_opt_thresh;
// Enable asymptotic closed-loop encoding decision for key frame and
// alternate reference frames.
int allow_acl;
// Temporal dependency model based encoding mode optimization
int enable_tpl_model;
// Use transform domain distortion. Use pixel domain distortion in speed 0
// and certain situations in higher speed to improve the RD model precision.
int allow_txfm_domain_distortion;
double tx_domain_thresh;
// The threshold is to determine how slow the motino is, it is used when
// use_lastframe_partitioning is set to LAST_FRAME_PARTITION_LOW_MOTION
MOTION_THRESHOLD lf_motion_threshold;
// Determine which method we use to determine transform size. We can choose
// between options like full rd, largest for prediction size, largest
// for intra and model coefs for the rest.
TX_SIZE_SEARCH_METHOD tx_size_search_method;
// How many levels of tx size to search, starting from the largest.
int tx_size_search_depth;
// Low precision 32x32 fdct keeps everything in 16 bits and thus is less
// precise but significantly faster than the non lp version.
int use_lp32x32fdct;
// After looking at the first set of modes (set by index here), skip
// checking modes for reference frames that don't match the reference frame
// of the best so far.
int mode_skip_start;
// TODO(JBB): Remove this.
int reference_masking;
PARTITION_SEARCH_TYPE partition_search_type;
// Used if partition_search_type = FIXED_SIZE_PARTITION
BLOCK_SIZE always_this_block_size;
// Skip rectangular partition test when partition type none gives better
// rd than partition type split.
int less_rectangular_check;
// Disable testing non square partitions(eg 16x32) for block sizes larger than
// use_square_only_thresh_high or smaller than use_square_only_thresh_low.
int use_square_partition_only;
BLOCK_SIZE use_square_only_thresh_high;
BLOCK_SIZE use_square_only_thresh_low;
// Prune reference frames for rectangular partitions.
int prune_ref_frame_for_rect_partitions;
// Sets min and max partition sizes for this 64x64 region based on the
// same 64x64 in last encoded frame, and the left and above neighbor.
AUTO_MIN_MAX_MODE auto_min_max_partition_size;
// Ensures the rd based auto partition search will always
// go down at least to the specified level.
BLOCK_SIZE rd_auto_partition_min_limit;
// Min and max 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;
// Whether or not we allow partitions one smaller or one greater than the last
// frame's partitioning. Only used if use_lastframe_partitioning is set.
int adjust_partitioning_from_last_frame;
// How frequently we re do the partitioning from scratch. Only used if
// use_lastframe_partitioning is set.
int last_partitioning_redo_frequency;
// Disables sub 8x8 blocksizes in different scenarios: Choices are to disable
// it always, to allow it for only Last frame and Intra, disable it for all
// inter modes or to enable it always.
int disable_split_mask;
// TODO(jingning): combine the related motion search speed features
// This allows us to use motion search at other sizes as a starting
// point for this motion search and limits the search range around it.
int adaptive_motion_search;
// Do extra full pixel motion search to obtain better motion vector.
int enhanced_full_pixel_motion_search;
// Threshold for allowing exhaistive motion search.
int exhaustive_searches_thresh;
// Pattern to be used for any exhaustive mesh searches.
MESH_PATTERN mesh_patterns[MAX_MESH_STEP];
int schedule_mode_search;
// Allows sub 8x8 modes to use the prediction filter that was determined
// best for 8x8 mode. If set to 0 we always re check all the filters for
// sizes less than 8x8, 1 means we check all filter modes if no 8x8 filter
// was selected, and 2 means we use 8 tap if no 8x8 filter mode was selected.
int adaptive_pred_interp_filter;
// Adaptive prediction mode search
int adaptive_mode_search;
// Chessboard pattern prediction filter type search
int cb_pred_filter_search;
int cb_partition_search;
int motion_field_mode_search;
int alt_ref_search_fp;
// Fast quantization process path
int use_quant_fp;
// Use finer quantizer in every other few frames that run variable block
// partition type search.
int force_frame_boost;
// Maximally allowed base quantization index fluctuation.
int max_delta_qindex;
// 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;
// A source variance threshold below which filter search is disabled
// Choose a very large value (UINT_MAX) to use 8-tap always
unsigned int disable_filter_search_var_thresh;
// 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];
// These bit masks allow you to enable or disable intra modes for each
// prediction block size separately.
int intra_y_mode_bsize_mask[BLOCK_SIZES];
// This variable enables an early break out of mode testing if the model for
// rd built from the prediction signal indicates a value that's much
// higher than the best rd we've seen so far.
int use_rd_breakout;
// This enables us to use an estimate for intra rd based on dc mode rather
// than choosing an actual uv mode in the stage of encoding before the actual
// final encode.
int use_uv_intra_rd_estimate;
// This feature controls how the loop filter level is determined.
LPF_PICK_METHOD lpf_pick;
// This feature limits the number of coefficients updates we actually do
// by only looking at counts from 1/2 the bands.
FAST_COEFF_UPDATE use_fast_coef_updates;
// This flag controls the use of non-RD mode decision.
int use_nonrd_pick_mode;
// A binary mask indicating if NEARESTMV, NEARMV, ZEROMV, NEWMV
// modes are used in order from LSB to MSB for each BLOCK_SIZE.
int inter_mode_mask[BLOCK_SIZES];
// This feature controls whether we do the expensive context update and
// calculation in the rd coefficient costing loop.
int use_fast_coef_costing;
// This feature controls the tolerence vs target used in deciding whether to
// recode a frame. It has no meaning if recode is disabled.
int recode_tolerance_low;
int recode_tolerance_high;
// 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;
// The frequency that we check if SOURCE_VAR_BASED_PARTITION or
// FIXED_PARTITION search type should be used.
int search_type_check_frequency;
// When partition is pre-set, the inter prediction result from pick_inter_mode
// can be reused in final block encoding process. It is enabled only for real-
// time mode speed 6.
int reuse_inter_pred_sby;
// This variable sets the encode_breakout threshold. Currently, it is only
// enabled in real time mode.
int encode_breakout_thresh;
// default interp filter choice
INTERP_FILTER default_interp_filter;
// Early termination in transform size search, which only applies while
// tx_size_search_method is USE_FULL_RD.
int tx_size_search_breakout;
// adaptive interp_filter search to allow skip of certain filter types.
int adaptive_interp_filter_search;
// mask for skip evaluation of certain interp_filter type.
INTERP_FILTER_MASK interp_filter_search_mask;
// Partition search early breakout thresholds.
PARTITION_SEARCH_BREAKOUT_THR partition_search_breakout_thr;
struct {
// Use ML-based partition search early breakout.
int search_breakout;
// Higher values mean more aggressiveness for partition search breakout that
// results in better encoding speed but worse compression performance.
float search_breakout_thresh[3];
// Machine-learning based partition search early termination
int search_early_termination;
// Machine-learning based partition search pruning using prediction residue
// variance.
int var_pruning;
// Threshold values used for ML based rectangular partition search pruning.
// If < 0, the feature is turned off.
// Higher values mean more aggressiveness to skip rectangular partition
// search that results in better encoding speed but worse coding
// performance.
int prune_rect_thresh[4];
} rd_ml_partition;
// Allow skipping partition search for still image frame
int allow_partition_search_skip;
// Fast approximation of vp9_model_rd_from_var_lapndz
int simple_model_rd_from_var;
// Skip a number of expensive mode evaluations for blocks with zero source
// variance.
int short_circuit_flat_blocks;
// Skip a number of expensive mode evaluations for blocks with very low
// temporal variance. If the low temporal variance flag is set for a block,
// do the following:
// 1: Skip all golden modes and ALL INTRA for bsize >= 32x32.
// 2: Skip golden non-zeromv and newmv-last for bsize >= 16x16, skip ALL
// INTRA for bsize >= 32x32 and vert/horz INTRA for bsize 16x16, 16x32 and
// 32x16.
// 3: Same as (2), but also skip golden zeromv.
int short_circuit_low_temp_var;
// Limits the rd-threshold update for early exit for the newmv-last mode,
// for non-rd mode.
int limit_newmv_early_exit;
// Adds a bias against golden reference, for non-rd mode.
int bias_golden;
// Bias to use base mv and skip 1/4 subpel search when use base mv in
// enhancement layer.
int base_mv_aggressive;
// Global flag to enable partition copy from the previous frame.
int copy_partition_flag;
// Compute the source sad for every superblock of the frame,
// prior to encoding the frame, to be used to bypass some encoder decisions.
int use_source_sad;
int use_simple_block_yrd;
// If source sad of superblock is high (> adapt_partition_thresh), will switch
// from VARIANCE_PARTITION to REFERENCE_PARTITION (which selects partition
// based on the nonrd-pickmode).
int adapt_partition_source_sad;
int adapt_partition_thresh;
// Enable use of alt-refs in 1 pass VBR.
int use_altref_onepass;
// Enable use of compound prediction, for nonrd_pickmode with nonzero lag.
int use_compound_nonrd_pickmode;
// Always use nonrd_pick_intra for all block sizes on keyframes.
int nonrd_keyframe;
// For SVC: enables use of partition from lower spatial resolution.
int svc_use_lowres_part;
// Flag to indicate process for handling overshoot on slide/scene change,
// for real-time CBR mode.
OVERSHOOT_DETECTION_CBR_RT overshoot_detection_cbr_rt;
// Disable partitioning of 16x16 blocks.
int disable_16x16part_nonkey;
// Allow for disabling golden reference.
int disable_golden_ref;
// Allow sub-pixel search to use interpolation filters with different taps in
// order to achieve accurate motion search result.
SUBPEL_SEARCH_TYPE use_accurate_subpel_search;
// Search method used by temporal filtering in full_pixel_motion_search.
SEARCH_METHODS temporal_filter_search_method;
// Use machine learning based partition search.
int nonrd_use_ml_partition;
// Multiplier for base thresold for variance partitioning.
int variance_part_thresh_mult;
// Force subpel motion filter to always use SMOOTH_FILTER.
int force_smooth_interpol;
// For real-time mode: force DC only under intra search when content
// does not have high souce SAD.
int rt_intra_dc_only_low_content;
// The encoder has a feature that skips forward transform and quantization
// based on a model rd estimation to reduce encoding time.
// However, this feature is dangerous since it could lead to bad perceptual
// quality. This flag is added to guard the feature.
int allow_skip_txfm_ac_dc;
} SPEED_FEATURES;
struct VP9_COMP;
void vp9_set_speed_features_framesize_independent(struct VP9_COMP *cpi,
int speed);
void vp9_set_speed_features_framesize_dependent(struct VP9_COMP *cpi,
int speed);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VPX_VP9_ENCODER_VP9_SPEED_FEATURES_H_