av1/encoder/hash.h

/*
 * 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 "aom/aom_integer.h"

#ifdef __cplusplus
extern "C" {
#endif

// 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);

// Maximum number of subblocks per block
// The biggest intraBC block size supported by AV1 is 128x128, and the smallest
// subblock size is 2x2, therefore there can be a maximum of (128/2) * (128/2)
// subblocks per block: 64 * 64 = 4096
#define AOM_BUFFER_SIZE_FOR_BLOCK_HASH (4096)

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // AOM_AV1_ENCODER_HASH_H_