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+/*
+ * 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 SPEED_FEATURES {
+ // 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.
+ 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.
+ 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_
+