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

 /*
  * 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_MCOMP_H_
 #define AOM_AV1_ENCODER_MCOMP_H_

 #include "av1/common/mv.h"
 #include "av1/encoder/block.h"
 #include "av1/encoder/rd.h"

 #include "aom_dsp/variance.h"

 #ifdef __cplusplus
 extern "C" {
 #endif

 // The maximum number of steps in a step search given the largest
 // allowed initial step
 #define MAX_MVSEARCH_STEPS 11
 // Max full pel mv specified in the unit of full pixel
 // Enable the use of motion vector in range [-1023, 1023].
 #define MAX_FULL_PEL_VAL ((1 << (MAX_MVSEARCH_STEPS - 1)) - 1)
 // Maximum size of the first step in full pel units
 #define MAX_FIRST_STEP (1 << (MAX_MVSEARCH_STEPS - 1))

 #define SEARCH_RANGE_8P 3
 #define SEARCH_GRID_STRIDE_8P (2 * SEARCH_RANGE_8P + 1)
 #define SEARCH_GRID_CENTER_8P \
   (SEARCH_RANGE_8P * SEARCH_GRID_STRIDE_8P + SEARCH_RANGE_8P)

 // motion search site
 typedef struct search_site {
   FULLPEL_MV mv;
   int offset;
 } search_site;

 typedef struct search_site_config {
   search_site site[MAX_MVSEARCH_STEPS * 2][16 + 1];
   // Number of search steps.
   int num_search_steps;
   int searches_per_step[MAX_MVSEARCH_STEPS * 2];
   int radius[MAX_MVSEARCH_STEPS * 2];
   int stride;
 } search_site_config;

 typedef struct {
   FULLPEL_MV coord;
   int coord_offset;
 } search_neighbors;

 struct AV1_COMP;
 struct SPEED_FEATURES;

 // =============================================================================
 //  Cost functions
 // =============================================================================

 enum {
   MV_COST_ENTROPY,    // Use the entropy rate of the mv as the cost
   MV_COST_L1_LOWRES,  // Use the l1 norm of the mv as the cost (<480p)
   MV_COST_L1_MIDRES,  // Use the l1 norm of the mv as the cost (>=480p)
   MV_COST_L1_HDRES,   // Use the l1 norm of the mv as the cost (>=720p)
   MV_COST_NONE        // Use 0 as as cost irrespective of the current mv
 } UENUM1BYTE(MV_COST_TYPE);

 typedef struct {
   // The reference mv used to compute the mv cost
   const MV *ref_mv;
   FULLPEL_MV full_ref_mv;
   MV_COST_TYPE mv_cost_type;
   const int *mvjcost;
   const int *mvcost[2];
   int error_per_bit;
   // A multiplier used to convert rate to sad cost
   int sad_per_bit;
 } MV_COST_PARAMS;

 int av1_mv_bit_cost(const MV *mv, const MV *ref_mv, const int *mvjcost,
                     int *const mvcost[2], int weight);

 int av1_get_mvpred_sse(const MV_COST_PARAMS *mv_cost_params,
                        const FULLPEL_MV best_mv,
                        const aom_variance_fn_ptr_t *vfp,
                        const struct buf_2d *src, const struct buf_2d *pre);
 int av1_get_mvpred_compound_var(const MV_COST_PARAMS *ms_params,
                                 const FULLPEL_MV best_mv,
                                 const uint8_t *second_pred, const uint8_t *mask,
                                 int mask_stride, int invert_mask,
                                 const aom_variance_fn_ptr_t *vfp,
                                 const struct buf_2d *src,
                                 const struct buf_2d *pre);

 // =============================================================================
 //  Motion Search
 // =============================================================================
 typedef struct {
   // The reference buffer
   const struct buf_2d *ref;

   // The source and predictors/mask used by translational search
   const struct buf_2d *src;
   const uint8_t *second_pred;
   const uint8_t *mask;
   int mask_stride;
   int inv_mask;

   // The weighted source and mask used by OBMC
   const int32_t *wsrc;
   const int32_t *obmc_mask;
 } MSBuffers;

 static INLINE void av1_set_ms_compound_refs(MSBuffers *ms_buffers,
                                             const uint8_t *second_pred,
                                             const uint8_t *mask,
                                             int mask_stride, int invert_mask) {
   ms_buffers->second_pred = second_pred;
   ms_buffers->mask = mask;
   ms_buffers->mask_stride = mask_stride;
   ms_buffers->inv_mask = invert_mask;
 }

 // =============================================================================
 //  Fullpixel Motion Search
 // =============================================================================
 enum {
   // Search 8-points in the radius grid around center, up to 11 search stages.
   DIAMOND = 0,
   // Search 12-points in the radius/tan_radius grid around center,
   // up to 15 search stages.
   NSTEP = 1,
   // Search 8-points in the radius grid around center, up to 16 search stages.
   NSTEP_8PT = 2,
   // Search 8-points in the radius grid around center, upto 11 search stages
   // with clamping of search radius.
   CLAMPED_DIAMOND = 3,
   // Search maximum 8-points in the radius grid around center,
   // up to 11 search stages. First stage consists of 8 search points
   // and the rest with 6 search points each in hex shape.
   HEX = 4,
   // Search maximum 8-points in the radius grid around center,
   // up to 11 search stages. First stage consists of 4 search
   // points and the rest with 8 search points each.
   BIGDIA = 5,
   // Search 8-points in the square grid around center, up to 11 search stages.
   SQUARE = 6,
   // HEX search with up to 2 stages.
   FAST_HEX = 7,
   // BIGDIA search with up to 2 stages.
   FAST_DIAMOND = 8,
   // BIGDIA search with up to 3 stages.
   FAST_BIGDIA = 9,
   // Total number of search methods.
   NUM_SEARCH_METHODS,
   // Number of distinct search methods.
   NUM_DISTINCT_SEARCH_METHODS = SQUARE + 1,
 } UENUM1BYTE(SEARCH_METHODS);

 // This struct holds fullpixel motion search parameters that should be constant
 // during the search
 typedef struct {
   BLOCK_SIZE bsize;
   // A function pointer to the simd function for fast computation
   const aom_variance_fn_ptr_t *vfp;

   MSBuffers ms_buffers;

   // WARNING: search_method should be regarded as a private variable and should
   // not be modified directly so it is in sync with search_sites. To modify it,
   // use av1_set_mv_search_method.
   SEARCH_METHODS search_method;
   const search_site_config *search_sites;
   FullMvLimits mv_limits;

   int run_mesh_search;    // Sets mesh search unless it got pruned by
                           // prune_mesh_search.
   int prune_mesh_search;  // Disables mesh search if the best_mv after a normal
                           // search if close to the start_mv.
   int mesh_search_mv_diff_threshold;  // mv diff threshold to enable
                                       // prune_mesh_search
   int force_mesh_thresh;  // Forces mesh search if the residue variance is
                           // higher than the threshold.
   const struct MESH_PATTERN *mesh_patterns[2];

   // Use maximum search interval of 4 if true. This helps motion search to find
   // the best motion vector for screen content types.
   int fine_search_interval;

   int is_intra_mode;

   int fast_obmc_search;

   // For calculating mv cost
   MV_COST_PARAMS mv_cost_params;

   // Stores the function used to compute the sad. This can be different from the
   // sdf in vfp (e.g. downsampled sad and not sad) to allow speed up.
   aom_sad_fn_t sdf;
   aom_sad_multi_d_fn_t sdx4df;
 } FULLPEL_MOTION_SEARCH_PARAMS;

 void av1_init_obmc_buffer(OBMCBuffer *obmc_buffer);

 void av1_make_default_fullpel_ms_params(
     FULLPEL_MOTION_SEARCH_PARAMS *ms_params, const struct AV1_COMP *cpi,
     const MACROBLOCK *x, BLOCK_SIZE bsize, const MV *ref_mv,
     const search_site_config search_sites[NUM_DISTINCT_SEARCH_METHODS],
     int fine_search_interval);

 /*! Sets the \ref FULLPEL_MOTION_SEARCH_PARAMS to intra mode. */
 void av1_set_ms_to_intra_mode(FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
                               const IntraBCMVCosts *dv_costs);

 // Sets up configs for fullpixel DIAMOND / CLAMPED_DIAMOND search method.
 void av1_init_dsmotion_compensation(search_site_config *cfg, int stride,
                                     int level);
 // Sets up configs for firstpass motion search.
 void av1_init_motion_fpf(search_site_config *cfg, int stride);
 // Sets up configs for NSTEP / NSTEP_8PT motion search method.
 void av1_init_motion_compensation_nstep(search_site_config *cfg, int stride,
                                         int level);
 // Sets up configs for BIGDIA / FAST_DIAMOND / FAST_BIGDIA
 // motion search method.
 void av1_init_motion_compensation_bigdia(search_site_config *cfg, int stride,
                                          int level);
 // Sets up configs for HEX or FAST_HEX motion search method.
 void av1_init_motion_compensation_hex(search_site_config *cfg, int stride,
                                       int level);
 // Sets up configs for SQUARE motion search method.
 void av1_init_motion_compensation_square(search_site_config *cfg, int stride,
                                          int level);

 // Mv beyond the range do not produce new/different prediction block.
 static INLINE void av1_set_mv_search_method(
     FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
     const search_site_config search_sites[NUM_DISTINCT_SEARCH_METHODS],
     SEARCH_METHODS search_method) {
   // Array to inform which all search methods are having
   // same candidates and different in number of search steps.
   static const SEARCH_METHODS search_method_lookup[NUM_SEARCH_METHODS] = {
     DIAMOND,          // DIAMOND
     NSTEP,            // NSTEP
     NSTEP_8PT,        // NSTEP_8PT
     CLAMPED_DIAMOND,  // CLAMPED_DIAMOND
     HEX,              // HEX
     BIGDIA,           // BIGDIA
     SQUARE,           // SQUARE
     HEX,              // FAST_HEX
     BIGDIA,           // FAST_DIAMOND
     BIGDIA            // FAST_BIGDIA
   };

   ms_params->search_method = search_method;
   ms_params->search_sites =
       &search_sites[search_method_lookup[ms_params->search_method]];
 }

 // Set up limit values for MV components.
 // Mv beyond the range do not produce new/different prediction block.
 static INLINE void av1_set_mv_row_limits(
     const CommonModeInfoParams *const mi_params, FullMvLimits *mv_limits,
     int mi_row, int mi_height, int border) {
   const int min1 = -(mi_row * MI_SIZE + border - 2 * AOM_INTERP_EXTEND);
   const int min2 = -(((mi_row + mi_height) * MI_SIZE) + 2 * AOM_INTERP_EXTEND);
   mv_limits->row_min = AOMMAX(min1, min2);
   const int max1 = (mi_params->mi_rows - mi_row - mi_height) * MI_SIZE +
                    border - 2 * AOM_INTERP_EXTEND;
   const int max2 =
       (mi_params->mi_rows - mi_row) * MI_SIZE + 2 * AOM_INTERP_EXTEND;
   mv_limits->row_max = AOMMIN(max1, max2);
 }

 static INLINE void av1_set_mv_col_limits(
     const CommonModeInfoParams *const mi_params, FullMvLimits *mv_limits,
     int mi_col, int mi_width, int border) {
   const int min1 = -(mi_col * MI_SIZE + border - 2 * AOM_INTERP_EXTEND);
   const int min2 = -(((mi_col + mi_width) * MI_SIZE) + 2 * AOM_INTERP_EXTEND);
   mv_limits->col_min = AOMMAX(min1, min2);
   const int max1 = (mi_params->mi_cols - mi_col - mi_width) * MI_SIZE + border -
                    2 * AOM_INTERP_EXTEND;
   const int max2 =
       (mi_params->mi_cols - mi_col) * MI_SIZE + 2 * AOM_INTERP_EXTEND;
   mv_limits->col_max = AOMMIN(max1, max2);
 }

 static INLINE void av1_set_mv_limits(
     const CommonModeInfoParams *const mi_params, FullMvLimits *mv_limits,
     int mi_row, int mi_col, int mi_height, int mi_width, int border) {
   av1_set_mv_row_limits(mi_params, mv_limits, mi_row, mi_height, border);
   av1_set_mv_col_limits(mi_params, mv_limits, mi_col, mi_width, border);
 }

 void av1_set_mv_search_range(FullMvLimits *mv_limits, const MV *mv);

 int av1_init_search_range(int size);

 unsigned int av1_int_pro_motion_estimation(const struct AV1_COMP *cpi,
                                            MACROBLOCK *x, BLOCK_SIZE bsize,
                                            int mi_row, int mi_col,
                                            const MV *ref_mv);

 int av1_refining_search_8p_c(const FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
                              const FULLPEL_MV start_mv, FULLPEL_MV *best_mv);

 int av1_full_pixel_search(const FULLPEL_MV start_mv,
                           const FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
                           const int step_param, int *cost_list,
                           FULLPEL_MV *best_mv, FULLPEL_MV *second_best_mv);

 int av1_intrabc_hash_search(const struct AV1_COMP *cpi, const MACROBLOCKD *xd,
                             const FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
                             IntraBCHashInfo *intrabc_hash_info,
                             FULLPEL_MV *best_mv);

 int av1_obmc_full_pixel_search(const FULLPEL_MV start_mv,
                                const FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
                                const int step_param, FULLPEL_MV *best_mv);

 static INLINE int av1_is_fullmv_in_range(const FullMvLimits *mv_limits,
                                          FULLPEL_MV mv) {
   return (mv.col >= mv_limits->col_min) && (mv.col <= mv_limits->col_max) &&
          (mv.row >= mv_limits->row_min) && (mv.row <= mv_limits->row_max);
 }
 // =============================================================================
 //  Subpixel Motion Search
 // =============================================================================
 enum {
   EIGHTH_PEL,
   QUARTER_PEL,
   HALF_PEL,
   FULL_PEL
 } UENUM1BYTE(SUBPEL_FORCE_STOP);

 typedef struct {
   const aom_variance_fn_ptr_t *vfp;
   SUBPEL_SEARCH_TYPE subpel_search_type;
   // Source and reference buffers
   MSBuffers ms_buffers;
   int w, h;
 } SUBPEL_SEARCH_VAR_PARAMS;

 // This struct holds subpixel motion search parameters that should be constant
 // during the search
 typedef struct {
   // High level motion search settings
   int allow_hp;
   const int *cost_list;
   SUBPEL_FORCE_STOP forced_stop;
   int iters_per_step;
   SubpelMvLimits mv_limits;

   // For calculating mv cost
   MV_COST_PARAMS mv_cost_params;

   // Distortion calculation params
   SUBPEL_SEARCH_VAR_PARAMS var_params;
 } SUBPEL_MOTION_SEARCH_PARAMS;

 void av1_make_default_subpel_ms_params(SUBPEL_MOTION_SEARCH_PARAMS *ms_params,
                                        const struct AV1_COMP *cpi,
                                        const MACROBLOCK *x, BLOCK_SIZE bsize,
                                        const MV *ref_mv, const int *cost_list);

 typedef int(fractional_mv_step_fp)(MACROBLOCKD *xd, const AV1_COMMON *const cm,
                                    const SUBPEL_MOTION_SEARCH_PARAMS *ms_params,
                                    MV start_mv, MV *bestmv, int *distortion,
                                    unsigned int *sse1,
                                    int_mv *last_mv_search_list);

 extern fractional_mv_step_fp av1_find_best_sub_pixel_tree;
 extern fractional_mv_step_fp av1_find_best_sub_pixel_tree_pruned;
 extern fractional_mv_step_fp av1_find_best_sub_pixel_tree_pruned_more;
 extern fractional_mv_step_fp av1_return_max_sub_pixel_mv;
 extern fractional_mv_step_fp av1_return_min_sub_pixel_mv;
 extern fractional_mv_step_fp av1_find_best_obmc_sub_pixel_tree_up;

 unsigned int av1_refine_warped_mv(MACROBLOCKD *xd, const AV1_COMMON *const cm,
                                   const SUBPEL_MOTION_SEARCH_PARAMS *ms_params,
                                   BLOCK_SIZE bsize, const int *pts0,
                                   const int *pts_inref0, int total_samples);

 static INLINE void av1_set_fractional_mv(int_mv *fractional_best_mv) {
   for (int z = 0; z < 3; z++) {
     fractional_best_mv[z].as_int = INVALID_MV;
   }
 }

 static INLINE void av1_set_subpel_mv_search_range(SubpelMvLimits *subpel_limits,
                                                   const FullMvLimits *mv_limits,
                                                   const MV *ref_mv) {
   const int max_mv = GET_MV_SUBPEL(MAX_FULL_PEL_VAL);
   const int minc =
       AOMMAX(GET_MV_SUBPEL(mv_limits->col_min), ref_mv->col - max_mv);
   const int maxc =
       AOMMIN(GET_MV_SUBPEL(mv_limits->col_max), ref_mv->col + max_mv);
   const int minr =
       AOMMAX(GET_MV_SUBPEL(mv_limits->row_min), ref_mv->row - max_mv);
   const int maxr =
       AOMMIN(GET_MV_SUBPEL(mv_limits->row_max), ref_mv->row + max_mv);

   subpel_limits->col_min = AOMMAX(MV_LOW + 1, minc);
   subpel_limits->col_max = AOMMIN(MV_UPP - 1, maxc);
   subpel_limits->row_min = AOMMAX(MV_LOW + 1, minr);
   subpel_limits->row_max = AOMMIN(MV_UPP - 1, maxr);
 }

 static INLINE int av1_is_subpelmv_in_range(const SubpelMvLimits *mv_limits,
                                            MV mv) {
   return (mv.col >= mv_limits->col_min) && (mv.col <= mv_limits->col_max) &&
          (mv.row >= mv_limits->row_min) && (mv.row <= mv_limits->row_max);
 }

 #ifdef __cplusplus
 }  // extern "C"
 #endif

 #endif  // AOM_AV1_ENCODER_MCOMP_H_
	/*
	* 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_MCOMP_H_
	#define AOM_AV1_ENCODER_MCOMP_H_

	#include "av1/common/mv.h"
	#include "av1/encoder/block.h"
	#include "av1/encoder/rd.h"

	#include "aom_dsp/variance.h"

	#ifdef __cplusplus
	extern "C" {
	#endif

	// The maximum number of steps in a step search given the largest
	// allowed initial step
	#define MAX_MVSEARCH_STEPS 11
	// Max full pel mv specified in the unit of full pixel
	// Enable the use of motion vector in range [-1023, 1023].
	#define MAX_FULL_PEL_VAL ((1 << (MAX_MVSEARCH_STEPS - 1)) - 1)
	// Maximum size of the first step in full pel units
	#define MAX_FIRST_STEP (1 << (MAX_MVSEARCH_STEPS - 1))

	#define SEARCH_RANGE_8P 3
	#define SEARCH_GRID_STRIDE_8P (2 * SEARCH_RANGE_8P + 1)
	#define SEARCH_GRID_CENTER_8P \
	(SEARCH_RANGE_8P * SEARCH_GRID_STRIDE_8P + SEARCH_RANGE_8P)

	// motion search site
	typedef struct search_site {
	FULLPEL_MV mv;
	int offset;
	} search_site;

	typedef struct search_site_config {
	search_site site[MAX_MVSEARCH_STEPS * 2][16 + 1];
	// Number of search steps.
	int num_search_steps;
	int searches_per_step[MAX_MVSEARCH_STEPS * 2];
	int radius[MAX_MVSEARCH_STEPS * 2];
	int stride;
	} search_site_config;

	typedef struct {
	FULLPEL_MV coord;
	int coord_offset;
	} search_neighbors;

	struct AV1_COMP;
	struct SPEED_FEATURES;

	// =============================================================================
	// Cost functions
	// =============================================================================

	enum {
	MV_COST_ENTROPY, // Use the entropy rate of the mv as the cost
	MV_COST_L1_LOWRES, // Use the l1 norm of the mv as the cost (<480p)
	MV_COST_L1_MIDRES, // Use the l1 norm of the mv as the cost (>=480p)
	MV_COST_L1_HDRES, // Use the l1 norm of the mv as the cost (>=720p)
	MV_COST_NONE // Use 0 as as cost irrespective of the current mv
	} UENUM1BYTE(MV_COST_TYPE);

	typedef struct {
	// The reference mv used to compute the mv cost
	const MV *ref_mv;
	FULLPEL_MV full_ref_mv;
	MV_COST_TYPE mv_cost_type;
	const int *mvjcost;
	const int *mvcost[2];
	int error_per_bit;
	// A multiplier used to convert rate to sad cost
	int sad_per_bit;
	} MV_COST_PARAMS;

	int av1_mv_bit_cost(const MV mv, const MV ref_mv, const int *mvjcost,
	int *const mvcost[2], int weight);

	int av1_get_mvpred_sse(const MV_COST_PARAMS *mv_cost_params,
	const FULLPEL_MV best_mv,
	const aom_variance_fn_ptr_t *vfp,
	const struct buf_2d src, const struct buf_2d pre);
	int av1_get_mvpred_compound_var(const MV_COST_PARAMS *ms_params,
	const FULLPEL_MV best_mv,
	const uint8_t second_pred, const uint8_t mask,
	int mask_stride, int invert_mask,
	const aom_variance_fn_ptr_t *vfp,
	const struct buf_2d *src,
	const struct buf_2d *pre);

	// =============================================================================
	// Motion Search
	// =============================================================================
	typedef struct {
	// The reference buffer
	const struct buf_2d *ref;

	// The source and predictors/mask used by translational search
	const struct buf_2d *src;
	const uint8_t *second_pred;
	const uint8_t *mask;
	int mask_stride;
	int inv_mask;

	// The weighted source and mask used by OBMC
	const int32_t *wsrc;
	const int32_t *obmc_mask;
	} MSBuffers;

	static INLINE void av1_set_ms_compound_refs(MSBuffers *ms_buffers,
	const uint8_t *second_pred,
	const uint8_t *mask,
	int mask_stride, int invert_mask) {
	ms_buffers->second_pred = second_pred;
	ms_buffers->mask = mask;
	ms_buffers->mask_stride = mask_stride;
	ms_buffers->inv_mask = invert_mask;
	}

	// =============================================================================
	// Fullpixel Motion Search
	// =============================================================================
	enum {
	// Search 8-points in the radius grid around center, up to 11 search stages.
	DIAMOND = 0,
	// Search 12-points in the radius/tan_radius grid around center,
	// up to 15 search stages.
	NSTEP = 1,
	// Search 8-points in the radius grid around center, up to 16 search stages.
	NSTEP_8PT = 2,
	// Search 8-points in the radius grid around center, upto 11 search stages
	// with clamping of search radius.
	CLAMPED_DIAMOND = 3,
	// Search maximum 8-points in the radius grid around center,
	// up to 11 search stages. First stage consists of 8 search points
	// and the rest with 6 search points each in hex shape.
	HEX = 4,
	// Search maximum 8-points in the radius grid around center,
	// up to 11 search stages. First stage consists of 4 search
	// points and the rest with 8 search points each.
	BIGDIA = 5,
	// Search 8-points in the square grid around center, up to 11 search stages.
	SQUARE = 6,
	// HEX search with up to 2 stages.
	FAST_HEX = 7,
	// BIGDIA search with up to 2 stages.
	FAST_DIAMOND = 8,
	// BIGDIA search with up to 3 stages.
	FAST_BIGDIA = 9,
	// Total number of search methods.
	NUM_SEARCH_METHODS,
	// Number of distinct search methods.
	NUM_DISTINCT_SEARCH_METHODS = SQUARE + 1,
	} UENUM1BYTE(SEARCH_METHODS);

	// This struct holds fullpixel motion search parameters that should be constant
	// during the search
	typedef struct {
	BLOCK_SIZE bsize;
	// A function pointer to the simd function for fast computation
	const aom_variance_fn_ptr_t *vfp;

	MSBuffers ms_buffers;

	// WARNING: search_method should be regarded as a private variable and should
	// not be modified directly so it is in sync with search_sites. To modify it,
	// use av1_set_mv_search_method.
	SEARCH_METHODS search_method;
	const search_site_config *search_sites;
	FullMvLimits mv_limits;

	int run_mesh_search; // Sets mesh search unless it got pruned by
	// prune_mesh_search.
	int prune_mesh_search; // Disables mesh search if the best_mv after a normal
	// search if close to the start_mv.
	int mesh_search_mv_diff_threshold; // mv diff threshold to enable
	// prune_mesh_search
	int force_mesh_thresh; // Forces mesh search if the residue variance is
	// higher than the threshold.
	const struct MESH_PATTERN *mesh_patterns[2];

	// Use maximum search interval of 4 if true. This helps motion search to find
	// the best motion vector for screen content types.
	int fine_search_interval;

	int is_intra_mode;

	int fast_obmc_search;

	// For calculating mv cost
	MV_COST_PARAMS mv_cost_params;

	// Stores the function used to compute the sad. This can be different from the
	// sdf in vfp (e.g. downsampled sad and not sad) to allow speed up.
	aom_sad_fn_t sdf;
	aom_sad_multi_d_fn_t sdx4df;
	} FULLPEL_MOTION_SEARCH_PARAMS;

	void av1_init_obmc_buffer(OBMCBuffer *obmc_buffer);

	void av1_make_default_fullpel_ms_params(
	FULLPEL_MOTION_SEARCH_PARAMS ms_params, const struct AV1_COMP cpi,
	const MACROBLOCK x, BLOCK_SIZE bsize, const MV ref_mv,
	const search_site_config search_sites[NUM_DISTINCT_SEARCH_METHODS],
	int fine_search_interval);

	/! Sets the \ref FULLPEL_MOTION_SEARCH_PARAMS to intra mode. /
	void av1_set_ms_to_intra_mode(FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
	const IntraBCMVCosts *dv_costs);

	// Sets up configs for fullpixel DIAMOND / CLAMPED_DIAMOND search method.
	void av1_init_dsmotion_compensation(search_site_config *cfg, int stride,
	int level);
	// Sets up configs for firstpass motion search.
	void av1_init_motion_fpf(search_site_config *cfg, int stride);
	// Sets up configs for NSTEP / NSTEP_8PT motion search method.
	void av1_init_motion_compensation_nstep(search_site_config *cfg, int stride,
	int level);
	// Sets up configs for BIGDIA / FAST_DIAMOND / FAST_BIGDIA
	// motion search method.
	void av1_init_motion_compensation_bigdia(search_site_config *cfg, int stride,
	int level);
	// Sets up configs for HEX or FAST_HEX motion search method.
	void av1_init_motion_compensation_hex(search_site_config *cfg, int stride,
	int level);
	// Sets up configs for SQUARE motion search method.
	void av1_init_motion_compensation_square(search_site_config *cfg, int stride,
	int level);

	// Mv beyond the range do not produce new/different prediction block.
	static INLINE void av1_set_mv_search_method(
	FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
	const search_site_config search_sites[NUM_DISTINCT_SEARCH_METHODS],
	SEARCH_METHODS search_method) {
	// Array to inform which all search methods are having
	// same candidates and different in number of search steps.
	static const SEARCH_METHODS search_method_lookup[NUM_SEARCH_METHODS] = {
	DIAMOND, // DIAMOND
	NSTEP, // NSTEP
	NSTEP_8PT, // NSTEP_8PT
	CLAMPED_DIAMOND, // CLAMPED_DIAMOND
	HEX, // HEX
	BIGDIA, // BIGDIA
	SQUARE, // SQUARE
	HEX, // FAST_HEX
	BIGDIA, // FAST_DIAMOND
	BIGDIA // FAST_BIGDIA
	};

	ms_params->search_method = search_method;
	ms_params->search_sites =
	&search_sites[search_method_lookup[ms_params->search_method]];
	}

	// Set up limit values for MV components.
	// Mv beyond the range do not produce new/different prediction block.
	static INLINE void av1_set_mv_row_limits(
	const CommonModeInfoParams const mi_params, FullMvLimits mv_limits,
	int mi_row, int mi_height, int border) {
	const int min1 = -(mi_row * MI_SIZE + border - 2 * AOM_INTERP_EXTEND);
	const int min2 = -(((mi_row + mi_height) * MI_SIZE) + 2 * AOM_INTERP_EXTEND);
	mv_limits->row_min = AOMMAX(min1, min2);
	const int max1 = (mi_params->mi_rows - mi_row - mi_height) * MI_SIZE +
	border - 2 * AOM_INTERP_EXTEND;
	const int max2 =
	(mi_params->mi_rows - mi_row) * MI_SIZE + 2 * AOM_INTERP_EXTEND;
	mv_limits->row_max = AOMMIN(max1, max2);
	}

	static INLINE void av1_set_mv_col_limits(
	const CommonModeInfoParams const mi_params, FullMvLimits mv_limits,
	int mi_col, int mi_width, int border) {
	const int min1 = -(mi_col * MI_SIZE + border - 2 * AOM_INTERP_EXTEND);
	const int min2 = -(((mi_col + mi_width) * MI_SIZE) + 2 * AOM_INTERP_EXTEND);
	mv_limits->col_min = AOMMAX(min1, min2);
	const int max1 = (mi_params->mi_cols - mi_col - mi_width) * MI_SIZE + border -
	2 * AOM_INTERP_EXTEND;
	const int max2 =
	(mi_params->mi_cols - mi_col) * MI_SIZE + 2 * AOM_INTERP_EXTEND;
	mv_limits->col_max = AOMMIN(max1, max2);
	}

	static INLINE void av1_set_mv_limits(
	const CommonModeInfoParams const mi_params, FullMvLimits mv_limits,
	int mi_row, int mi_col, int mi_height, int mi_width, int border) {
	av1_set_mv_row_limits(mi_params, mv_limits, mi_row, mi_height, border);
	av1_set_mv_col_limits(mi_params, mv_limits, mi_col, mi_width, border);
	}

	void av1_set_mv_search_range(FullMvLimits mv_limits, const MV mv);

	int av1_init_search_range(int size);

	unsigned int av1_int_pro_motion_estimation(const struct AV1_COMP *cpi,
	MACROBLOCK *x, BLOCK_SIZE bsize,
	int mi_row, int mi_col,
	const MV *ref_mv);

	int av1_refining_search_8p_c(const FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
	const FULLPEL_MV start_mv, FULLPEL_MV *best_mv);

	int av1_full_pixel_search(const FULLPEL_MV start_mv,
	const FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
	const int step_param, int *cost_list,
	FULLPEL_MV best_mv, FULLPEL_MV second_best_mv);

	int av1_intrabc_hash_search(const struct AV1_COMP cpi, const MACROBLOCKD xd,
	const FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
	IntraBCHashInfo *intrabc_hash_info,
	FULLPEL_MV *best_mv);

	int av1_obmc_full_pixel_search(const FULLPEL_MV start_mv,
	const FULLPEL_MOTION_SEARCH_PARAMS *ms_params,
	const int step_param, FULLPEL_MV *best_mv);

	static INLINE int av1_is_fullmv_in_range(const FullMvLimits *mv_limits,
	FULLPEL_MV mv) {
	return (mv.col >= mv_limits->col_min) && (mv.col <= mv_limits->col_max) &&
	(mv.row >= mv_limits->row_min) && (mv.row <= mv_limits->row_max);
	}
	// =============================================================================
	// Subpixel Motion Search
	// =============================================================================
	enum {
	EIGHTH_PEL,
	QUARTER_PEL,
	HALF_PEL,
	FULL_PEL
	} UENUM1BYTE(SUBPEL_FORCE_STOP);

	typedef struct {
	const aom_variance_fn_ptr_t *vfp;
	SUBPEL_SEARCH_TYPE subpel_search_type;
	// Source and reference buffers
	MSBuffers ms_buffers;
	int w, h;
	} SUBPEL_SEARCH_VAR_PARAMS;

	// This struct holds subpixel motion search parameters that should be constant
	// during the search
	typedef struct {
	// High level motion search settings
	int allow_hp;
	const int *cost_list;
	SUBPEL_FORCE_STOP forced_stop;
	int iters_per_step;
	SubpelMvLimits mv_limits;

	// For calculating mv cost
	MV_COST_PARAMS mv_cost_params;

	// Distortion calculation params
	SUBPEL_SEARCH_VAR_PARAMS var_params;
	} SUBPEL_MOTION_SEARCH_PARAMS;

	void av1_make_default_subpel_ms_params(SUBPEL_MOTION_SEARCH_PARAMS *ms_params,
	const struct AV1_COMP *cpi,
	const MACROBLOCK *x, BLOCK_SIZE bsize,
	const MV ref_mv, const int cost_list);

	typedef int(fractional_mv_step_fp)(MACROBLOCKD xd, const AV1_COMMON const cm,
	const SUBPEL_MOTION_SEARCH_PARAMS *ms_params,
	MV start_mv, MV bestmv, int distortion,
	unsigned int *sse1,
	int_mv *last_mv_search_list);

	extern fractional_mv_step_fp av1_find_best_sub_pixel_tree;
	extern fractional_mv_step_fp av1_find_best_sub_pixel_tree_pruned;
	extern fractional_mv_step_fp av1_find_best_sub_pixel_tree_pruned_more;
	extern fractional_mv_step_fp av1_return_max_sub_pixel_mv;
	extern fractional_mv_step_fp av1_return_min_sub_pixel_mv;
	extern fractional_mv_step_fp av1_find_best_obmc_sub_pixel_tree_up;

	unsigned int av1_refine_warped_mv(MACROBLOCKD xd, const AV1_COMMON const cm,
	const SUBPEL_MOTION_SEARCH_PARAMS *ms_params,
	BLOCK_SIZE bsize, const int *pts0,
	const int *pts_inref0, int total_samples);

	static INLINE void av1_set_fractional_mv(int_mv *fractional_best_mv) {
	for (int z = 0; z < 3; z++) {
	fractional_best_mv[z].as_int = INVALID_MV;
	}
	}

	static INLINE void av1_set_subpel_mv_search_range(SubpelMvLimits *subpel_limits,
	const FullMvLimits *mv_limits,
	const MV *ref_mv) {
	const int max_mv = GET_MV_SUBPEL(MAX_FULL_PEL_VAL);
	const int minc =
	AOMMAX(GET_MV_SUBPEL(mv_limits->col_min), ref_mv->col - max_mv);
	const int maxc =
	AOMMIN(GET_MV_SUBPEL(mv_limits->col_max), ref_mv->col + max_mv);
	const int minr =
	AOMMAX(GET_MV_SUBPEL(mv_limits->row_min), ref_mv->row - max_mv);
	const int maxr =
	AOMMIN(GET_MV_SUBPEL(mv_limits->row_max), ref_mv->row + max_mv);

	subpel_limits->col_min = AOMMAX(MV_LOW + 1, minc);
	subpel_limits->col_max = AOMMIN(MV_UPP - 1, maxc);
	subpel_limits->row_min = AOMMAX(MV_LOW + 1, minr);
	subpel_limits->row_max = AOMMIN(MV_UPP - 1, maxr);
	}

	static INLINE int av1_is_subpelmv_in_range(const SubpelMvLimits *mv_limits,
	MV mv) {
	return (mv.col >= mv_limits->col_min) && (mv.col <= mv_limits->col_max) &&
	(mv.row >= mv_limits->row_min) && (mv.row <= mv_limits->row_max);
	}

	#ifdef __cplusplus
	} // extern "C"
	#endif

	#endif // AOM_AV1_ENCODER_MCOMP_H_