69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
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/*
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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_AOM_AOM_INTEGER_H_
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#define AOM_AOM_AOM_INTEGER_H_
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/* get ptrdiff_t, size_t, wchar_t, NULL */
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#include <stddef.h>
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#if defined(_MSC_VER)
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#define AOM_FORCE_INLINE __forceinline
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#define AOM_INLINE __inline
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#else
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#define AOM_FORCE_INLINE __inline__ __attribute__((always_inline))
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#define AOM_INLINE inline
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#endif
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/* Assume platforms have the C99 standard integer types. */
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#if defined(__cplusplus)
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#if !defined(__STDC_FORMAT_MACROS)
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#define __STDC_FORMAT_MACROS
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#endif
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#if !defined(__STDC_LIMIT_MACROS)
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#define __STDC_LIMIT_MACROS
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#endif
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#endif // __cplusplus
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#include <inttypes.h>
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#include <stdint.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif // __cplusplus
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// Returns size of uint64_t when encoded using LEB128.
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size_t aom_uleb_size_in_bytes(uint64_t value);
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// Returns 0 on success, -1 on decode failure.
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// On success, 'value' stores the decoded LEB128 value and 'length' stores
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// the number of bytes decoded.
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int aom_uleb_decode(const uint8_t *buffer, size_t available, uint64_t *value,
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size_t *length);
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// Encodes LEB128 integer. Returns 0 when successful, and -1 upon failure.
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int aom_uleb_encode(uint64_t value, size_t available, uint8_t *coded_value,
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size_t *coded_size);
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// Encodes LEB128 integer to size specified. Returns 0 when successful, and -1
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// upon failure.
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// Note: This will write exactly pad_to_size bytes; if the value cannot be
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// encoded in this many bytes, then this will fail.
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int aom_uleb_encode_fixed_size(uint64_t value, size_t available,
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size_t pad_to_size, uint8_t *coded_value,
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size_t *coded_size);
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#if defined(__cplusplus)
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} // extern "C"
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#endif // __cplusplus
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#endif // AOM_AOM_AOM_INTEGER_H_
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