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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_H_
#define AOM_AV1_ENCODER_HASH_H_
#include "config/aom_config.h"
#include "aom/aom_integer.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct _crc_calculator {
uint32_t remainder;
uint32_t trunc_poly;
uint32_t bits;
uint32_t table[256];
uint32_t final_result_mask;
} CRC_CALCULATOR;
// Initialize the crc calculator. It must be executed at least once before
// calling av1_get_crc_value().
void av1_crc_calculator_init(CRC_CALCULATOR *p_crc_calculator, uint32_t bits,
uint32_t truncPoly);
uint32_t av1_get_crc_value(void *crc_calculator, uint8_t *p, int length);
// CRC32C: POLY = 0x82f63b78;
typedef struct _CRC32C {
/* Table for a quadword-at-a-time software crc. */
uint32_t table[8][256];
} CRC32C;
// init table for software version crc32c
void av1_crc32c_calculator_init(CRC32C *p_crc32c);
#define AOM_BUFFER_SIZE_FOR_BLOCK_HASH (4096)
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_ENCODER_HASH_H_
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