chromium/third_party/libaom/source/libaom/av1/encoder/hash.c

/*
 * 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.
 */

#include "av1/encoder/hash.h"
#include "config/av1_rtcd.h"

static void crc_calculator_process_data(CRC_CALCULATOR *p_crc_calculator,
                                        uint8_t *pData, uint32_t dataLength) { … }

static void crc_calculator_reset(CRC_CALCULATOR *p_crc_calculator) { … }

static uint32_t crc_calculator_get_crc(CRC_CALCULATOR *p_crc_calculator) { … }

static void crc_calculator_init_table(CRC_CALCULATOR *p_crc_calculator) { … }

void av1_crc_calculator_init(CRC_CALCULATOR *p_crc_calculator, uint32_t bits,
                             uint32_t truncPoly) { … }

uint32_t av1_get_crc_value(CRC_CALCULATOR *p_crc_calculator, uint8_t *p,
                           int length) { … }

/* CRC-32C (iSCSI) polynomial in reversed bit order. */
#define POLY …

/* Construct table for software CRC-32C calculation. */
void av1_crc32c_calculator_init(CRC32C *p_crc32c) { … }

/* Table-driven software version as a fall-back.  This is about 15 times slower
 than using the hardware instructions.  This assumes little-endian integers,
 as is the case on Intel processors that the assembler code here is for. */
uint32_t av1_get_crc32c_value_c(void *c, uint8_t *buf, size_t len) { … }