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/*
* 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_HASH_MOTION_H_
#define AOM_AV1_ENCODER_HASH_MOTION_H_
#include <stdbool.h>
#include "aom/aom_integer.h"
#include "aom_scale/yv12config.h"
#include "av1/encoder/hash.h"
#include "third_party/vector/vector.h"
#ifdef __cplusplus
extern "C" {
#endif
// Block size used for force_integer_mv decisions
#define FORCE_INT_MV_DECISION_BLOCK_SIZE 8
// store a block's hash info.
// x and y are the position from the top left of the picture
// hash_value2 is used to store the second hash value
typedef struct _block_hash {
int16_t x;
int16_t y;
uint32_t hash_value2;
} block_hash;
typedef struct _hash_table {
// a dynamically allocated array of kMaxAddr elements
Vector **p_lookup_table;
} hash_table;
struct intrabc_hash_info;
typedef struct intrabc_hash_info {
// buffer for hash value calculation of a block
// used only in av1_get_block_hash_value()
// [two buffers used ping-pong]
// buffers are AOM_BUFFER_SIZE_FOR_BLOCK_HASH elements long
uint32_t *hash_value_buffer[2];
hash_table intrabc_hash_table;
CRC32C crc_calculator;
int crc_initialized;
} IntraBCHashInfo;
void av1_hash_table_init(IntraBCHashInfo *intra_bc_hash_info);
void av1_hash_table_destroy(hash_table *p_hash_table);
bool av1_hash_table_create(hash_table *p_hash_table);
int32_t av1_hash_table_count(const hash_table *p_hash_table,
uint32_t hash_value);
Iterator av1_hash_get_first_iterator(hash_table *p_hash_table,
uint32_t hash_value);
void av1_generate_block_2x2_hash_value(const YV12_BUFFER_CONFIG *picture,
uint32_t *pic_block_hash);
void av1_generate_block_hash_value(IntraBCHashInfo *intra_bc_hash_info,
const YV12_BUFFER_CONFIG *picture,
int block_size,
const uint32_t *src_pic_block_hash,
uint32_t *dst_pic_block_hash);
bool av1_add_to_hash_map_by_row_with_precal_data(hash_table *p_hash_table,
const uint32_t *pic_hash,
int pic_width, int pic_height,
int block_size);
// check whether the block starts from (x_start, y_start) with the size of
// block_size x block_size has the same color in all rows
int av1_hash_is_horizontal_perfect(const YV12_BUFFER_CONFIG *picture,
int block_size, int x_start, int y_start);
// check whether the block starts from (x_start, y_start) with the size of
// block_size x block_size has the same color in all columns
int av1_hash_is_vertical_perfect(const YV12_BUFFER_CONFIG *picture,
int block_size, int x_start, int y_start);
void av1_get_block_hash_value(IntraBCHashInfo *intra_bc_hash_info,
const uint8_t *y_src, int stride, int block_size,
uint32_t *hash_value1, uint32_t *hash_value2,
int use_highbitdepth);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_ENCODER_HASH_MOTION_H_
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