av1/encoder/partition_strategy.h - aom - Git at Google

 /*
  * Copyright (c) 2019, 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_PARTITION_STRATEGY_H_
 #define AOM_AV1_ENCODER_PARTITION_STRATEGY_H_

 #include "av1/encoder/encodeframe.h"
 #include "av1/encoder/encodemb.h"
 #include "av1/encoder/encoder.h"

 #define FEATURE_SIZE_SMS_SPLIT_FAST 6
 #define FEATURE_SIZE_SMS_SPLIT 17
 #define FEATURE_SIZE_SMS_PRUNE_PART 25
 #define FEATURE_SIZE_SMS_TERM_NONE 28
 #define FEATURE_SIZE_FP_SMS_TERM_NONE 20
 #define FEATURE_SIZE_MAX_MIN_PART_PRED 13
 #define MAX_NUM_CLASSES_MAX_MIN_PART_PRED 4

 #define FEATURE_SMS_NONE_FLAG 1
 #define FEATURE_SMS_SPLIT_FLAG (1 << 1)
 #define FEATURE_SMS_RECT_FLAG (1 << 2)

 #define FEATURE_SMS_PRUNE_PART_FLAG \
   (FEATURE_SMS_NONE_FLAG | FEATURE_SMS_SPLIT_FLAG | FEATURE_SMS_RECT_FLAG)
 #define FEATURE_SMS_SPLIT_MODEL_FLAG \
   (FEATURE_SMS_NONE_FLAG | FEATURE_SMS_SPLIT_FLAG)

 // Number of sub-partitions in rectangular partition types.
 #define SUB_PARTITIONS_RECT 2

 // Number of sub-partitions in split partition type.
 #define SUB_PARTITIONS_SPLIT 4

 // Number of sub-partitions in AB partition types.
 #define SUB_PARTITIONS_AB 3

 // Number of sub-partitions in 4-way partition types.
 #define SUB_PARTITIONS_PART4 4

 // 4part parition types.
 enum { HORZ4 = 0, VERT4, NUM_PART4_TYPES } UENUM1BYTE(PART4_TYPES);

 // AB parition types.
 enum {
   HORZ_A = 0,
   HORZ_B,
   VERT_A,
   VERT_B,
   NUM_AB_PARTS
 } UENUM1BYTE(AB_PART_TYPE);

 // Rectangular parition types.
 enum { HORZ = 0, VERT, NUM_RECT_PARTS } UENUM1BYTE(RECT_PART_TYPE);

 // Structure to keep win flags for HORZ and VERT partition evaluations.
 typedef struct {
   int rect_part_win[NUM_RECT_PARTS];
 } RD_RECT_PART_WIN_INFO;

 void av1_intra_mode_cnn_partition(const AV1_COMMON *const cm, MACROBLOCK *x,
                                   int bsize, int label_idx,
                                   int *partition_none_allowed,
                                   int *partition_horz_allowed,
                                   int *partition_vert_allowed,
                                   int *do_rectangular_split,
                                   int *do_square_split);

 // Performs a simple_motion_search with a single reference frame and extract
 // the variance of residues. Then use the features to determine whether we want
 // to go straight to splitting without trying PARTITION_NONE
 void av1_simple_motion_search_based_split(
     AV1_COMP *const cpi, MACROBLOCK *x, SIMPLE_MOTION_DATA_TREE *sms_tree,
     int mi_row, int mi_col, BLOCK_SIZE bsize, int *partition_none_allowed,
     int *partition_horz_allowed, int *partition_vert_allowed,
     int *do_rectangular_split, int *do_square_split);

 // Performs a simple_motion_search with two reference frames and extract
 // the variance of residues. Then use the features to determine whether we want
 // to prune some partitions.
 void av1_simple_motion_search_prune_rect(
     AV1_COMP *const cpi, MACROBLOCK *x, SIMPLE_MOTION_DATA_TREE *sms_tree,
     int mi_row, int mi_col, BLOCK_SIZE bsize, int partition_horz_allowed,
     int partition_vert_allowed, int *prune_horz, int *prune_vert);

 #if !CONFIG_REALTIME_ONLY
 // Early terminates PARTITION_NONE using simple_motion_search features and the
 // rate, distortion, and rdcost of PARTITION_NONE. This is only called when:
 //  - The frame is a show frame
 //  - The frame is not intra only
 //  - The current bsize is > BLOCK_8X8
 //  - blk_row + blk_height/2 < total_rows and blk_col + blk_width/2 < total_cols
 void av1_simple_motion_search_early_term_none(
     AV1_COMP *const cpi, MACROBLOCK *x, SIMPLE_MOTION_DATA_TREE *sms_tree,
     int mi_row, int mi_col, BLOCK_SIZE bsize, const RD_STATS *none_rdc,
     int *early_terminate);

 // Get the features for selecting the max and min partition size. Currently this
 // performs simple_motion_search on 16X16 subblocks of the current superblock,
 // and then extract the statistics of sse and motion vectors as features.
 void av1_get_max_min_partition_features(AV1_COMP *const cpi, MACROBLOCK *x,
                                         int mi_row, int mi_col,
                                         float *features);

 // Predict the maximum BLOCK_SIZE to be used to encoder the current superblock.
 BLOCK_SIZE av1_predict_max_partition(const AV1_COMP *const cpi,
                                      const MACROBLOCK *const x,
                                      const float *features);

 // Attempts an early termination after PARTITION_SPLIT.
 void av1_ml_early_term_after_split(AV1_COMP *const cpi, MACROBLOCK *const x,
                                    SIMPLE_MOTION_DATA_TREE *const sms_tree,
                                    BLOCK_SIZE bsize, int64_t best_rd,
                                    int64_t part_none_rd, int64_t part_split_rd,
                                    int64_t *split_block_rd, int mi_row,
                                    int mi_col,
                                    int *const terminate_partition_search);

 // Use the rdcost ratio and source var ratio to prune PARTITION_HORZ and
 // PARTITION_VERT.
 // TODO(chiyotsai@google.com): Currently this model does not use q value and has
 // no information about rectangular partitions. Preliminary experiments suggest
 // that we can get better performance by adding in q_index and rectangular
 // sse/var from SMS. We should retrain and tune this model later.
 void av1_ml_prune_rect_partition(const AV1_COMP *const cpi,
                                  const MACROBLOCK *const x, BLOCK_SIZE bsize,
                                  int64_t best_rd, int64_t none_rd,
                                  int64_t *split_rd, int *const dst_prune_horz,
                                  int *const dst_prune_vert);

 // Use a ML model to predict if horz_a, horz_b, vert_a, and vert_b should be
 // considered.
 void av1_ml_prune_ab_partition(
     BLOCK_SIZE bsize, int part_ctx, int var_ctx, int64_t best_rd,
     int64_t horz_rd[SUB_PARTITIONS_RECT], int64_t vert_rd[SUB_PARTITIONS_RECT],
     int64_t split_rd[SUB_PARTITIONS_SPLIT], int *const horza_partition_allowed,
     int *const horzb_partition_allowed, int *const verta_partition_allowed,
     int *const vertb_partition_allowed);

 // Use a ML model to predict if horz4 and vert4 should be considered.
 void av1_ml_prune_4_partition(
     const AV1_COMP *const cpi, MACROBLOCK *const x, BLOCK_SIZE bsize,
     int part_ctx, int64_t best_rd,
     int64_t rect_part_rd[NUM_RECT_PARTS][SUB_PARTITIONS_RECT],
     int64_t split_rd[SUB_PARTITIONS_SPLIT], int *const partition_horz4_allowed,
     int *const partition_vert4_allowed, unsigned int pb_source_variance,
     int mi_row, int mi_col);

 // ML-based partition search breakout after PARTITION_NONE.
 int av1_ml_predict_breakout(const AV1_COMP *const cpi, BLOCK_SIZE bsize,
                             const MACROBLOCK *const x,
                             const RD_STATS *const rd_stats,
                             unsigned int pb_source_variance, int bit_depth);

 // The first round of partition pruning determined before any partition
 // has been tested. The decisions will be updated and passed back
 // to the partition search function.
 void av1_prune_partitions_before_search(
     AV1_COMP *const cpi, MACROBLOCK *const x, int mi_row, int mi_col,
     BLOCK_SIZE bsize, SIMPLE_MOTION_DATA_TREE *const sms_tree,
     int *partition_none_allowed, int *partition_horz_allowed,
     int *partition_vert_allowed, int *do_rectangular_split,
     int *do_square_split, int *prune_horz, int *prune_vert);

 // Prune out partitions that lead to coding block sizes outside the min and max
 // bsizes set by the encoder. Max and min square partition levels are defined as
 // the partition nodes that the recursive function rd_pick_partition() can
 // reach. To implement this: only PARTITION_NONE is allowed if the current node
 // equals max_partition_size, only PARTITION_SPLIT is allowed if the current
 // node exceeds max_partition_size.
 void av1_prune_partitions_by_max_min_bsize(
     SuperBlockEnc *sb_enc, BLOCK_SIZE bsize, int is_not_edge_block,
     int *partition_none_allowed, int *partition_horz_allowed,
     int *partition_vert_allowed, int *do_square_split);

 // Prune out AB partitions based on rd decisions made from testing the
 // basic partitions.
 void av1_prune_ab_partitions(
     const AV1_COMP *cpi, const MACROBLOCK *x, const PC_TREE *pc_tree,
     BLOCK_SIZE bsize, int pb_source_variance, int64_t best_rdcost,
     int64_t rect_part_rd[NUM_RECT_PARTS][SUB_PARTITIONS_RECT],
     int64_t split_rd[SUB_PARTITIONS_SPLIT],
     const RD_RECT_PART_WIN_INFO *rect_part_win_info, int ext_partition_allowed,
     int partition_horz_allowed, int partition_vert_allowed,
     int *horza_partition_allowed, int *horzb_partition_allowed,
     int *verta_partition_allowed, int *vertb_partition_allowed);
 #endif  // !CONFIG_REALTIME_ONLY

 // A simplified version of set_offsets meant to be used for
 // simple_motion_search.
 static INLINE void set_offsets_for_motion_search(const AV1_COMP *const cpi,
                                                  MACROBLOCK *const x,
                                                  int mi_row, int mi_col,
                                                  BLOCK_SIZE bsize) {
   const AV1_COMMON *const cm = &cpi->common;
   const CommonModeInfoParams *const mi_params = &cm->mi_params;
   const int num_planes = av1_num_planes(cm);
   MACROBLOCKD *const xd = &x->e_mbd;
   const int mi_width = mi_size_wide[bsize];
   const int mi_height = mi_size_high[bsize];

   set_mode_info_offsets(&cpi->common.mi_params, &cpi->mbmi_ext_info, x, xd,
                         mi_row, mi_col);

   // Set up destination pointers.
   av1_setup_dst_planes(xd->plane, bsize, &cm->cur_frame->buf, mi_row, mi_col, 0,
                        num_planes);

   // Set up limit values for MV components.
   // Mv beyond the range do not produce new/different prediction block.
   av1_set_mv_limits(mi_params, &x->mv_limits, mi_row, mi_col, mi_height,
                     mi_width, cpi->oxcf.border_in_pixels);

   set_plane_n4(xd, mi_width, mi_height, num_planes);

   xd->mi_row = mi_row;
   xd->mi_col = mi_col;

   // Set up distance of MB to edge of frame in 1/8th pel units.
   assert(!(mi_col & (mi_width - 1)) && !(mi_row & (mi_height - 1)));
   xd->mb_to_top_edge = -GET_MV_SUBPEL(mi_row * MI_SIZE);
   xd->mb_to_bottom_edge =
       GET_MV_SUBPEL((mi_params->mi_rows - mi_height - mi_row) * MI_SIZE);
   xd->mb_to_left_edge = -GET_MV_SUBPEL(mi_col * MI_SIZE);
   xd->mb_to_right_edge =
       GET_MV_SUBPEL((mi_params->mi_cols - mi_width - mi_col) * MI_SIZE);

   // Set up source buffers.
   av1_setup_src_planes(x, cpi->source, mi_row, mi_col, num_planes, bsize);
 }

 static INLINE void init_simple_motion_search_mvs(
     SIMPLE_MOTION_DATA_TREE *sms_tree) {
   av1_zero(sms_tree->start_mvs);
   av1_zero(sms_tree->sms_none_feat);
   av1_zero(sms_tree->sms_rect_feat);
   av1_zero(sms_tree->sms_none_valid);
   av1_zero(sms_tree->sms_rect_valid);

   if (sms_tree->block_size >= BLOCK_8X8) {
     init_simple_motion_search_mvs(sms_tree->split[0]);
     init_simple_motion_search_mvs(sms_tree->split[1]);
     init_simple_motion_search_mvs(sms_tree->split[2]);
     init_simple_motion_search_mvs(sms_tree->split[3]);
   }
 }

 static INLINE int is_full_sb(const CommonModeInfoParams *const mi_params,
                              int mi_row, int mi_col, BLOCK_SIZE sb_size) {
   const int sb_mi_wide = mi_size_wide[sb_size];
   const int sb_mi_high = mi_size_high[sb_size];

   return (mi_row + sb_mi_high) <= mi_params->mi_rows &&
          (mi_col + sb_mi_wide) <= mi_params->mi_cols;
 }

 // Do not use this criteria for screen content videos.
 // Since screen content videos could often find good predictors and the largest
 // block size is likely to be used.
 static INLINE int use_auto_max_partition(const AV1_COMP *const cpi,
                                          BLOCK_SIZE sb_size, int mi_row,
                                          int mi_col) {
   assert(IMPLIES(cpi->ppi->gf_group.size > 0,
                  cpi->gf_frame_index < cpi->ppi->gf_group.size));
   const AV1_COMMON *const cm = &cpi->common;
   return !frame_is_intra_only(cm) && !cpi->use_screen_content_tools &&
          cpi->sf.part_sf.auto_max_partition_based_on_simple_motion !=
              NOT_IN_USE &&
          sb_size == BLOCK_128X128 &&
          is_full_sb(&cm->mi_params, mi_row, mi_col, sb_size) &&
          cpi->ppi->gf_group.update_type[cpi->gf_frame_index] !=
              OVERLAY_UPDATE &&
          cpi->ppi->gf_group.update_type[cpi->gf_frame_index] !=
              INTNL_OVERLAY_UPDATE;
 }

 #endif  // AOM_AV1_ENCODER_PARTITION_STRATEGY_H_
	/*
	* Copyright (c) 2019, 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_PARTITION_STRATEGY_H_
	#define AOM_AV1_ENCODER_PARTITION_STRATEGY_H_

	#include "av1/encoder/encodeframe.h"
	#include "av1/encoder/encodemb.h"
	#include "av1/encoder/encoder.h"

	#define FEATURE_SIZE_SMS_SPLIT_FAST 6
	#define FEATURE_SIZE_SMS_SPLIT 17
	#define FEATURE_SIZE_SMS_PRUNE_PART 25
	#define FEATURE_SIZE_SMS_TERM_NONE 28
	#define FEATURE_SIZE_FP_SMS_TERM_NONE 20
	#define FEATURE_SIZE_MAX_MIN_PART_PRED 13
	#define MAX_NUM_CLASSES_MAX_MIN_PART_PRED 4

	#define FEATURE_SMS_NONE_FLAG 1
	#define FEATURE_SMS_SPLIT_FLAG (1 << 1)
	#define FEATURE_SMS_RECT_FLAG (1 << 2)

	#define FEATURE_SMS_PRUNE_PART_FLAG \
	(FEATURE_SMS_NONE_FLAG \| FEATURE_SMS_SPLIT_FLAG \| FEATURE_SMS_RECT_FLAG)
	#define FEATURE_SMS_SPLIT_MODEL_FLAG \
	(FEATURE_SMS_NONE_FLAG \| FEATURE_SMS_SPLIT_FLAG)

	// Number of sub-partitions in rectangular partition types.
	#define SUB_PARTITIONS_RECT 2

	// Number of sub-partitions in split partition type.
	#define SUB_PARTITIONS_SPLIT 4

	// Number of sub-partitions in AB partition types.
	#define SUB_PARTITIONS_AB 3

	// Number of sub-partitions in 4-way partition types.
	#define SUB_PARTITIONS_PART4 4

	// 4part parition types.
	enum { HORZ4 = 0, VERT4, NUM_PART4_TYPES } UENUM1BYTE(PART4_TYPES);

	// AB parition types.
	enum {
	HORZ_A = 0,
	HORZ_B,
	VERT_A,
	VERT_B,
	NUM_AB_PARTS
	} UENUM1BYTE(AB_PART_TYPE);

	// Rectangular parition types.
	enum { HORZ = 0, VERT, NUM_RECT_PARTS } UENUM1BYTE(RECT_PART_TYPE);

	// Structure to keep win flags for HORZ and VERT partition evaluations.
	typedef struct {
	int rect_part_win[NUM_RECT_PARTS];
	} RD_RECT_PART_WIN_INFO;

	void av1_intra_mode_cnn_partition(const AV1_COMMON const cm, MACROBLOCK x,
	int bsize, int label_idx,
	int *partition_none_allowed,
	int *partition_horz_allowed,
	int *partition_vert_allowed,
	int *do_rectangular_split,
	int *do_square_split);

	// Performs a simple_motion_search with a single reference frame and extract
	// the variance of residues. Then use the features to determine whether we want
	// to go straight to splitting without trying PARTITION_NONE
	void av1_simple_motion_search_based_split(
	AV1_COMP const cpi, MACROBLOCK x, SIMPLE_MOTION_DATA_TREE *sms_tree,
	int mi_row, int mi_col, BLOCK_SIZE bsize, int *partition_none_allowed,
	int partition_horz_allowed, int partition_vert_allowed,
	int do_rectangular_split, int do_square_split);

	// Performs a simple_motion_search with two reference frames and extract
	// the variance of residues. Then use the features to determine whether we want
	// to prune some partitions.
	void av1_simple_motion_search_prune_rect(
	AV1_COMP const cpi, MACROBLOCK x, SIMPLE_MOTION_DATA_TREE *sms_tree,
	int mi_row, int mi_col, BLOCK_SIZE bsize, int partition_horz_allowed,
	int partition_vert_allowed, int prune_horz, int prune_vert);

	#if !CONFIG_REALTIME_ONLY
	// Early terminates PARTITION_NONE using simple_motion_search features and the
	// rate, distortion, and rdcost of PARTITION_NONE. This is only called when:
	// - The frame is a show frame
	// - The frame is not intra only
	// - The current bsize is > BLOCK_8X8
	// - blk_row + blk_height/2 < total_rows and blk_col + blk_width/2 < total_cols
	void av1_simple_motion_search_early_term_none(
	AV1_COMP const cpi, MACROBLOCK x, SIMPLE_MOTION_DATA_TREE *sms_tree,
	int mi_row, int mi_col, BLOCK_SIZE bsize, const RD_STATS *none_rdc,
	int *early_terminate);

	// Get the features for selecting the max and min partition size. Currently this
	// performs simple_motion_search on 16X16 subblocks of the current superblock,
	// and then extract the statistics of sse and motion vectors as features.
	void av1_get_max_min_partition_features(AV1_COMP const cpi, MACROBLOCK x,
	int mi_row, int mi_col,
	float *features);

	// Predict the maximum BLOCK_SIZE to be used to encoder the current superblock.
	BLOCK_SIZE av1_predict_max_partition(const AV1_COMP *const cpi,
	const MACROBLOCK *const x,
	const float *features);

	// Attempts an early termination after PARTITION_SPLIT.
	void av1_ml_early_term_after_split(AV1_COMP const cpi, MACROBLOCK const x,
	SIMPLE_MOTION_DATA_TREE *const sms_tree,
	BLOCK_SIZE bsize, int64_t best_rd,
	int64_t part_none_rd, int64_t part_split_rd,
	int64_t *split_block_rd, int mi_row,
	int mi_col,
	int *const terminate_partition_search);

	// Use the rdcost ratio and source var ratio to prune PARTITION_HORZ and
	// PARTITION_VERT.
	// TODO(chiyotsai@google.com): Currently this model does not use q value and has
	// no information about rectangular partitions. Preliminary experiments suggest
	// that we can get better performance by adding in q_index and rectangular
	// sse/var from SMS. We should retrain and tune this model later.
	void av1_ml_prune_rect_partition(const AV1_COMP *const cpi,
	const MACROBLOCK *const x, BLOCK_SIZE bsize,
	int64_t best_rd, int64_t none_rd,
	int64_t split_rd, int const dst_prune_horz,
	int *const dst_prune_vert);

	// Use a ML model to predict if horz_a, horz_b, vert_a, and vert_b should be
	// considered.
	void av1_ml_prune_ab_partition(
	BLOCK_SIZE bsize, int part_ctx, int var_ctx, int64_t best_rd,
	int64_t horz_rd[SUB_PARTITIONS_RECT], int64_t vert_rd[SUB_PARTITIONS_RECT],
	int64_t split_rd[SUB_PARTITIONS_SPLIT], int *const horza_partition_allowed,
	int const horzb_partition_allowed, int const verta_partition_allowed,
	int *const vertb_partition_allowed);

	// Use a ML model to predict if horz4 and vert4 should be considered.
	void av1_ml_prune_4_partition(
	const AV1_COMP const cpi, MACROBLOCK const x, BLOCK_SIZE bsize,
	int part_ctx, int64_t best_rd,
	int64_t rect_part_rd[NUM_RECT_PARTS][SUB_PARTITIONS_RECT],
	int64_t split_rd[SUB_PARTITIONS_SPLIT], int *const partition_horz4_allowed,
	int *const partition_vert4_allowed, unsigned int pb_source_variance,
	int mi_row, int mi_col);

	// ML-based partition search breakout after PARTITION_NONE.
	int av1_ml_predict_breakout(const AV1_COMP *const cpi, BLOCK_SIZE bsize,
	const MACROBLOCK *const x,
	const RD_STATS *const rd_stats,
	unsigned int pb_source_variance, int bit_depth);

	// The first round of partition pruning determined before any partition
	// has been tested. The decisions will be updated and passed back
	// to the partition search function.
	void av1_prune_partitions_before_search(
	AV1_COMP const cpi, MACROBLOCK const x, int mi_row, int mi_col,
	BLOCK_SIZE bsize, SIMPLE_MOTION_DATA_TREE *const sms_tree,
	int partition_none_allowed, int partition_horz_allowed,
	int partition_vert_allowed, int do_rectangular_split,
	int do_square_split, int prune_horz, int *prune_vert);

	// Prune out partitions that lead to coding block sizes outside the min and max
	// bsizes set by the encoder. Max and min square partition levels are defined as
	// the partition nodes that the recursive function rd_pick_partition() can
	// reach. To implement this: only PARTITION_NONE is allowed if the current node
	// equals max_partition_size, only PARTITION_SPLIT is allowed if the current
	// node exceeds max_partition_size.
	void av1_prune_partitions_by_max_min_bsize(
	SuperBlockEnc *sb_enc, BLOCK_SIZE bsize, int is_not_edge_block,
	int partition_none_allowed, int partition_horz_allowed,
	int partition_vert_allowed, int do_square_split);

	// Prune out AB partitions based on rd decisions made from testing the
	// basic partitions.
	void av1_prune_ab_partitions(
	const AV1_COMP cpi, const MACROBLOCK x, const PC_TREE *pc_tree,
	BLOCK_SIZE bsize, int pb_source_variance, int64_t best_rdcost,
	int64_t rect_part_rd[NUM_RECT_PARTS][SUB_PARTITIONS_RECT],
	int64_t split_rd[SUB_PARTITIONS_SPLIT],
	const RD_RECT_PART_WIN_INFO *rect_part_win_info, int ext_partition_allowed,
	int partition_horz_allowed, int partition_vert_allowed,
	int horza_partition_allowed, int horzb_partition_allowed,
	int verta_partition_allowed, int vertb_partition_allowed);
	#endif // !CONFIG_REALTIME_ONLY

	// A simplified version of set_offsets meant to be used for
	// simple_motion_search.
	static INLINE void set_offsets_for_motion_search(const AV1_COMP *const cpi,
	MACROBLOCK *const x,
	int mi_row, int mi_col,
	BLOCK_SIZE bsize) {
	const AV1_COMMON *const cm = &cpi->common;
	const CommonModeInfoParams *const mi_params = &cm->mi_params;
	const int num_planes = av1_num_planes(cm);
	MACROBLOCKD *const xd = &x->e_mbd;
	const int mi_width = mi_size_wide[bsize];
	const int mi_height = mi_size_high[bsize];

	set_mode_info_offsets(&cpi->common.mi_params, &cpi->mbmi_ext_info, x, xd,
	mi_row, mi_col);

	// Set up destination pointers.
	av1_setup_dst_planes(xd->plane, bsize, &cm->cur_frame->buf, mi_row, mi_col, 0,
	num_planes);

	// Set up limit values for MV components.
	// Mv beyond the range do not produce new/different prediction block.
	av1_set_mv_limits(mi_params, &x->mv_limits, mi_row, mi_col, mi_height,
	mi_width, cpi->oxcf.border_in_pixels);

	set_plane_n4(xd, mi_width, mi_height, num_planes);

	xd->mi_row = mi_row;
	xd->mi_col = mi_col;

	// Set up distance of MB to edge of frame in 1/8th pel units.
	assert(!(mi_col & (mi_width - 1)) && !(mi_row & (mi_height - 1)));
	xd->mb_to_top_edge = -GET_MV_SUBPEL(mi_row * MI_SIZE);
	xd->mb_to_bottom_edge =
	GET_MV_SUBPEL((mi_params->mi_rows - mi_height - mi_row) * MI_SIZE);
	xd->mb_to_left_edge = -GET_MV_SUBPEL(mi_col * MI_SIZE);
	xd->mb_to_right_edge =
	GET_MV_SUBPEL((mi_params->mi_cols - mi_width - mi_col) * MI_SIZE);

	// Set up source buffers.
	av1_setup_src_planes(x, cpi->source, mi_row, mi_col, num_planes, bsize);
	}

	static INLINE void init_simple_motion_search_mvs(
	SIMPLE_MOTION_DATA_TREE *sms_tree) {
	av1_zero(sms_tree->start_mvs);
	av1_zero(sms_tree->sms_none_feat);
	av1_zero(sms_tree->sms_rect_feat);
	av1_zero(sms_tree->sms_none_valid);
	av1_zero(sms_tree->sms_rect_valid);

	if (sms_tree->block_size >= BLOCK_8X8) {
	init_simple_motion_search_mvs(sms_tree->split[0]);
	init_simple_motion_search_mvs(sms_tree->split[1]);
	init_simple_motion_search_mvs(sms_tree->split[2]);
	init_simple_motion_search_mvs(sms_tree->split[3]);
	}
	}

	static INLINE int is_full_sb(const CommonModeInfoParams *const mi_params,
	int mi_row, int mi_col, BLOCK_SIZE sb_size) {
	const int sb_mi_wide = mi_size_wide[sb_size];
	const int sb_mi_high = mi_size_high[sb_size];

	return (mi_row + sb_mi_high) <= mi_params->mi_rows &&
	(mi_col + sb_mi_wide) <= mi_params->mi_cols;
	}

	// Do not use this criteria for screen content videos.
	// Since screen content videos could often find good predictors and the largest
	// block size is likely to be used.
	static INLINE int use_auto_max_partition(const AV1_COMP *const cpi,
	BLOCK_SIZE sb_size, int mi_row,
	int mi_col) {
	assert(IMPLIES(cpi->ppi->gf_group.size > 0,
	cpi->gf_frame_index < cpi->ppi->gf_group.size));
	const AV1_COMMON *const cm = &cpi->common;
	return !frame_is_intra_only(cm) && !cpi->use_screen_content_tools &&
	cpi->sf.part_sf.auto_max_partition_based_on_simple_motion !=
	NOT_IN_USE &&
	sb_size == BLOCK_128X128 &&
	is_full_sb(&cm->mi_params, mi_row, mi_col, sb_size) &&
	cpi->ppi->gf_group.update_type[cpi->gf_frame_index] !=
	OVERLAY_UPDATE &&
	cpi->ppi->gf_group.update_type[cpi->gf_frame_index] !=
	INTNL_OVERLAY_UPDATE;
	}

	#endif // AOM_AV1_ENCODER_PARTITION_STRATEGY_H_