1 /* 2 * Copyright (c) 2016, 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_HASH_MOTION_H_ 13 #define AOM_AV1_ENCODER_HASH_MOTION_H_ 14 15 #include "config/aom_config.h" 16 17 #include "aom/aom_integer.h" 18 #include "aom_scale/yv12config.h" 19 #include "av1/encoder/hash.h" 20 #include "third_party/vector/vector.h" 21 #ifdef __cplusplus 22 extern "C" { 23 #endif 24 25 // Block size used for force_integer_mv decisions 26 #define FORCE_INT_MV_DECISION_BLOCK_SIZE 8 27 28 // store a block's hash info. 29 // x and y are the position from the top left of the picture 30 // hash_value2 is used to store the second hash value 31 typedef struct _block_hash { 32 int16_t x; 33 int16_t y; 34 uint32_t hash_value2; 35 } block_hash; 36 37 typedef struct _hash_table { 38 Vector **p_lookup_table; 39 } hash_table; 40 41 struct intrabc_hash_info; 42 43 typedef struct intrabc_hash_info { 44 // buffer for hash value calculation of a block 45 // used only in av1_get_block_hash_value() 46 // [first hash/second hash] 47 // [two buffers used ping-pong] 48 uint32_t *hash_value_buffer[2][2]; 49 hash_table intrabc_hash_table; 50 51 CRC_CALCULATOR crc_calculator1; 52 CRC_CALCULATOR crc_calculator2; 53 int g_crc_initialized; 54 } IntraBCHashInfo; 55 56 void av1_hash_table_init(IntraBCHashInfo *intra_bc_hash_info); 57 void av1_hash_table_clear_all(hash_table *p_hash_table); 58 void av1_hash_table_destroy(hash_table *p_hash_table); 59 void av1_hash_table_create(hash_table *p_hash_table); 60 int32_t av1_hash_table_count(const hash_table *p_hash_table, 61 uint32_t hash_value); 62 Iterator av1_hash_get_first_iterator(hash_table *p_hash_table, 63 uint32_t hash_value); 64 int32_t av1_has_exact_match(hash_table *p_hash_table, uint32_t hash_value1, 65 uint32_t hash_value2); 66 void av1_generate_block_2x2_hash_value(IntraBCHashInfo *intra_bc_hash_info, 67 const YV12_BUFFER_CONFIG *picture, 68 uint32_t *pic_block_hash[2], 69 int8_t *pic_block_same_info[3]); 70 void av1_generate_block_hash_value(IntraBCHashInfo *intra_bc_hash_info, 71 const YV12_BUFFER_CONFIG *picture, 72 int block_size, 73 uint32_t *src_pic_block_hash[2], 74 uint32_t *dst_pic_block_hash[2], 75 int8_t *src_pic_block_same_info[3], 76 int8_t *dst_pic_block_same_info[3]); 77 void av1_add_to_hash_map_by_row_with_precal_data(hash_table *p_hash_table, 78 uint32_t *pic_hash[2], 79 int8_t *pic_is_same, 80 int pic_width, int pic_height, 81 int block_size); 82 83 // check whether the block starts from (x_start, y_start) with the size of 84 // block_size x block_size has the same color in all rows 85 int av1_hash_is_horizontal_perfect(const YV12_BUFFER_CONFIG *picture, 86 int block_size, int x_start, int y_start); 87 // check whether the block starts from (x_start, y_start) with the size of 88 // block_size x block_size has the same color in all columns 89 int av1_hash_is_vertical_perfect(const YV12_BUFFER_CONFIG *picture, 90 int block_size, int x_start, int y_start); 91 92 void av1_get_block_hash_value(IntraBCHashInfo *intrabc_hash_info, 93 const uint8_t *y_src, int stride, int block_size, 94 uint32_t *hash_value1, uint32_t *hash_value2, 95 int use_highbitdepth); 96 97 #ifdef __cplusplus 98 } // extern "C" 99 #endif 100 101 #endif // AOM_AV1_ENCODER_HASH_MOTION_H_ 102