ref: 06e6d56fa138d84759e8bdfd4c721ead000051b4
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 VP9_ENCODER_VP9_SPEED_FEATURES_H_
#define VP9_ENCODER_VP9_SPEED_FEATURES_H_
#include "vp9/common/vp9_enums.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
DIAMOND = 0,
NSTEP = 1,
HEX = 2,
BIGDIA = 3,
SQUARE = 4,
FAST_HEX = 5,
FAST_DIAMOND = 6
} 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 all frames based on bitrate constraints.
ALLOW_RECODE = 3,
} RECODE_LOOP_TYPE;
typedef enum {
SUBPEL_TREE = 0,
// Other methods to come
} SUBPEL_SEARCH_METHODS;
typedef enum {
LAST_FRAME_PARTITION_OFF = 0,
LAST_FRAME_PARTITION_LOW_MOTION = 1,
LAST_FRAME_PARTITION_ALL = 2
} LAST_FRAME_PARTITION_METHOD;
typedef enum {
USE_FULL_RD = 0,
USE_LARGESTINTRA,
USE_LARGESTINTRA_MODELINTER,
USE_LARGESTALL
} 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,
} 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 comp inter modes if the best single intermode so far does
// not have the same reference as one of the two references being
// tested.
FLAG_SKIP_COMP_REFMISMATCH = 1 << 2,
// 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 {
// Search partitions using RD/NONRD criterion
SEARCH_PARTITION = 0,
// Always use a fixed size partition
FIXED_PARTITION = 1,
// Use a fixed size partition in every 64X64 SB, where the size is
// determined based on source variance
VAR_BASED_FIXED_PARTITION = 2,
REFERENCE_PARTITION = 3,
// 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
} 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 conducted.
ONE_LOOP = 1,
// No dry run, also only half the coef contexts and bands are updated.
// The rest are not updated at all.
ONE_LOOP_REDUCED = 2
} FAST_COEFF_UPDATE;
typedef struct {
// Frame level coding parameter update
int frame_parameter_update;
// Motion search method (Diamond, NSTEP, Hex, Big Diamond, Square, etc).
SEARCH_METHODS search_method;
RECODE_LOOP_TYPE recode_loop;
// 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;
// Maximum number of steps in logarithmic subpel search before giving up.
int subpel_iters_per_step;
// Control when to stop subpel search
int subpel_force_stop;
// This parameter controls the number of steps we'll do in a diamond
// search.
int max_step_search_steps;
// 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;
// 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.
int 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.
int adaptive_rd_thresh;
// 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;
// This variable allows us to reuse the last frames partition choices
// (64x64 v 32x32 etc) for this frame. It can be set to only use the last
// frame as a starting point in low motion scenes or always use it. If set
// we use last partitioning_redo frequency to determine how often to redo
// the partitioning from scratch. Adjust_partitioning_from_last_frame
// enables us to adjust up or down one partitioning from the last frames
// partitioning.
LAST_FRAME_PARTITION_METHOD use_lastframe_partitioning;
// 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;
// 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;
// TODO(JBB): remove this as its no longer used.
// 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)
int use_square_partition_only;
// 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;
// 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 min_partition_size;
BLOCK_SIZE 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;
// This enables constrained copy partitioning, which, given an input block
// size bsize, will copy previous partition for partitions less than bsize,
// otherwise bsize partition is used. bsize is currently set to 16x16.
// Used for the case where motion is detected in superblock.
int constrain_copy_partition;
// 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;
// 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;
// Search through variable block partition types in non-RD mode decision
// encoding process for RTC.
int partition_check;
// Chessboard pattern index
int chessboard_index;
// 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 the split mode is disabled
unsigned int disable_split_var_thresh;
// 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];
// 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;
// This variable sets the encode_breakout threshold. Currently, it is only
// enabled in real time mode.
int encode_breakout_thresh;
// A binary mask indicating if NEARESTMV, NEARMV, ZEROMV, NEWMV
// modes are disabled in order from LSB to MSB for each BLOCK_SIZE.
int disable_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;
// 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;
// The threshold used in SOURCE_VAR_BASED_PARTITION search type.
unsigned int source_var_thresh;
} SPEED_FEATURES;
struct VP9_COMP;
void vp9_set_speed_features(struct VP9_COMP *cpi);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VP9_ENCODER_VP9_SPEED_FEATURES_H_