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Diffstat (limited to 'media/libaom/src/av1/encoder/hash.h')
| -rw-r--r-- | media/libaom/src/av1/encoder/hash.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/media/libaom/src/av1/encoder/hash.h b/media/libaom/src/av1/encoder/hash.h new file mode 100644 index 000000000..826c004d6 --- /dev/null +++ b/media/libaom/src/av1/encoder/hash.h @@ -0,0 +1,52 @@ +/* + * 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_ |