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/*
* Copyright (c) 2022, 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_STRUCTS_H_
#define AOM_AV1_ENCODER_MCOMP_STRUCTS_H_
#include "av1/common/mv.h"
// 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))
// Maximum number of neighbors to scan per iteration during
// WARPED_CAUSAL refinement
// Note: The elements of warp_search_config.neighbor_mask must be at least
// MAX_WARP_SEARCH_NEIGHBORS many bits wide. So the type may need to be
// widened if this value is increased.
#define MAX_WARP_SEARCH_NEIGHBORS 8
#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)
typedef struct {
FULLPEL_MV coord;
int coord_offset;
} search_neighbors;
// 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;
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,
// BIGDIA search with up to 1 stage.
VFAST_DIAMOND = 10,
// Total number of search methods.
NUM_SEARCH_METHODS,
// Number of distinct search methods.
NUM_DISTINCT_SEARCH_METHODS = SQUARE + 1,
} UENUM1BYTE(SEARCH_METHODS);
typedef struct warp_search_config {
int num_neighbors;
MV neighbors[MAX_WARP_SEARCH_NEIGHBORS];
// Bitmask which is used to prune the search neighbors at one iteration
// based on which direction we chose in the previous iteration.
// See comments in av1_refine_warped_mv for details.
uint8_t neighbor_mask[MAX_WARP_SEARCH_NEIGHBORS];
} warp_search_config;
// Methods for refining WARPED_CAUSAL motion vectors
enum {
// Search 4 adjacent points in a diamond shape at each iteration
WARP_SEARCH_DIAMOND,
// Search 8 adjacent points in a square at each iteration
WARP_SEARCH_SQUARE,
WARP_SEARCH_METHODS
} UENUM1BYTE(WARP_SEARCH_METHOD);
#endif // AOM_AV1_ENCODER_MCOMP_STRUCTS_H_
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