mcomp_structs.h (4012B)
1 /* 2 * Copyright (c) 2022, Alliance for Open Media. All rights reserved. 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #ifndef AOM_AV1_ENCODER_MCOMP_STRUCTS_H_ 13 #define AOM_AV1_ENCODER_MCOMP_STRUCTS_H_ 14 15 #include "av1/common/mv.h" 16 17 // The maximum number of steps in a step search given the largest 18 // allowed initial step 19 #define MAX_MVSEARCH_STEPS 11 20 // Max full pel mv specified in the unit of full pixel 21 // Enable the use of motion vector in range [-1023, 1023]. 22 #define MAX_FULL_PEL_VAL ((1 << (MAX_MVSEARCH_STEPS - 1)) - 1) 23 // Maximum size of the first step in full pel units 24 #define MAX_FIRST_STEP (1 << (MAX_MVSEARCH_STEPS - 1)) 25 // Maximum number of neighbors to scan per iteration during 26 // WARPED_CAUSAL refinement 27 // Note: The elements of warp_search_config.neighbor_mask must be at least 28 // MAX_WARP_SEARCH_NEIGHBORS many bits wide. So the type may need to be 29 // widened if this value is increased. 30 #define MAX_WARP_SEARCH_NEIGHBORS 8 31 32 #define SEARCH_RANGE_8P 3 33 #define SEARCH_GRID_STRIDE_8P (2 * SEARCH_RANGE_8P + 1) 34 #define SEARCH_GRID_CENTER_8P \ 35 (SEARCH_RANGE_8P * SEARCH_GRID_STRIDE_8P + SEARCH_RANGE_8P) 36 37 typedef struct { 38 FULLPEL_MV coord; 39 int coord_offset; 40 } search_neighbors; 41 // motion search site 42 typedef struct search_site { 43 FULLPEL_MV mv; 44 int offset; 45 } search_site; 46 47 typedef struct search_site_config { 48 search_site site[MAX_MVSEARCH_STEPS * 2][16 + 1]; 49 // Number of search steps. 50 int num_search_steps; 51 int searches_per_step[MAX_MVSEARCH_STEPS * 2]; 52 int radius[MAX_MVSEARCH_STEPS * 2]; 53 int stride; 54 } search_site_config; 55 56 enum { 57 // Search 8-points in the radius grid around center, up to 11 search stages. 58 DIAMOND = 0, 59 // Search 12-points in the radius/tan_radius grid around center, 60 // up to 15 search stages. 61 NSTEP = 1, 62 // Search 8-points in the radius grid around center, up to 16 search stages. 63 NSTEP_8PT = 2, 64 // Search 8-points in the radius grid around center, upto 11 search stages 65 // with clamping of search radius. 66 CLAMPED_DIAMOND = 3, 67 // Search maximum 8-points in the radius grid around center, 68 // up to 11 search stages. First stage consists of 8 search points 69 // and the rest with 6 search points each in hex shape. 70 HEX = 4, 71 // Search maximum 8-points in the radius grid around center, 72 // up to 11 search stages. First stage consists of 4 search 73 // points and the rest with 8 search points each. 74 BIGDIA = 5, 75 // Search 8-points in the square grid around center, up to 11 search stages. 76 SQUARE = 6, 77 // HEX search with up to 2 stages. 78 FAST_HEX = 7, 79 // BIGDIA search with up to 2 stages. 80 FAST_DIAMOND = 8, 81 // BIGDIA search with up to 3 stages. 82 FAST_BIGDIA = 9, 83 // BIGDIA search with up to 1 stage. 84 VFAST_DIAMOND = 10, 85 // Total number of search methods. 86 NUM_SEARCH_METHODS, 87 // Number of distinct search methods. 88 NUM_DISTINCT_SEARCH_METHODS = SQUARE + 1, 89 } UENUM1BYTE(SEARCH_METHODS); 90 91 typedef struct warp_search_config { 92 int num_neighbors; 93 MV neighbors[MAX_WARP_SEARCH_NEIGHBORS]; 94 // Bitmask which is used to prune the search neighbors at one iteration 95 // based on which direction we chose in the previous iteration. 96 // See comments in av1_refine_warped_mv for details. 97 uint8_t neighbor_mask[MAX_WARP_SEARCH_NEIGHBORS]; 98 } warp_search_config; 99 100 // Methods for refining WARPED_CAUSAL motion vectors 101 enum { 102 // Search 4 adjacent points in a diamond shape at each iteration 103 WARP_SEARCH_DIAMOND, 104 // Search 8 adjacent points in a square at each iteration 105 WARP_SEARCH_SQUARE, 106 WARP_SEARCH_METHODS 107 } UENUM1BYTE(WARP_SEARCH_METHOD); 108 109 #endif // AOM_AV1_ENCODER_MCOMP_STRUCTS_H_