53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved.
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AOM_AV1_ENCODER_HASH_H_
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#define AOM_AV1_ENCODER_HASH_H_
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#include "config/aom_config.h"
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#include "aom/aom_integer.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct _crc_calculator {
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uint32_t remainder;
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uint32_t trunc_poly;
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uint32_t bits;
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uint32_t table[256];
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uint32_t final_result_mask;
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} CRC_CALCULATOR;
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// Initialize the crc calculator. It must be executed at least once before
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// calling av1_get_crc_value().
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void av1_crc_calculator_init(CRC_CALCULATOR *p_crc_calculator, uint32_t bits,
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uint32_t truncPoly);
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uint32_t av1_get_crc_value(CRC_CALCULATOR *p_crc_calculator, uint8_t *p,
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int length);
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// CRC32C: POLY = 0x82f63b78;
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typedef struct _CRC32C {
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/* Table for a quadword-at-a-time software crc. */
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uint32_t table[8][256];
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} CRC32C;
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// init table for software version crc32c
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void av1_crc32c_calculator_init(CRC32C *p_crc32c);
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#define AOM_BUFFER_SIZE_FOR_BLOCK_HASH (4096)
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AOM_AV1_ENCODER_HASH_H_
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