/* * 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.
*/
// 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
typedefstruct {
FULLPEL_MV coord; int coord_offset;
} search_neighbors; // motion search site typedefstruct search_site {
FULLPEL_MV mv; int offset;
} search_site;
typedefstruct 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);
typedefstruct 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);
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