133 строки
4.3 KiB
C
133 строки
4.3 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 AV1_COMMON_ODINTRIN_H_
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#define AV1_COMMON_ODINTRIN_H_
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#include "aom/aom_integer.h"
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#include "aom_dsp/aom_dsp_common.h"
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#include "aom_ports/bitops.h"
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#include "av1/common/enums.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*Smallest blocks are 4x4*/
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#define OD_LOG_BSIZE0 (2)
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/*There are 5 block sizes total (4x4, 8x8, 16x16, 32x32 and 64x64).*/
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#define OD_NBSIZES (5)
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/*The log of the maximum length of the side of a block.*/
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#define OD_LOG_BSIZE_MAX (OD_LOG_BSIZE0 + OD_NBSIZES - 1)
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/*The maximum length of the side of a block.*/
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#define OD_BSIZE_MAX (1 << OD_LOG_BSIZE_MAX)
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typedef int od_coeff;
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#define OD_DIVU_DMAX (1024)
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extern uint32_t OD_DIVU_SMALL_CONSTS[OD_DIVU_DMAX][2];
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/*Translate unsigned division by small divisors into multiplications.*/
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#define OD_DIVU_SMALL(_x, _d) \
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((uint32_t)((OD_DIVU_SMALL_CONSTS[(_d)-1][0] * (uint64_t)(_x) + \
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OD_DIVU_SMALL_CONSTS[(_d)-1][1]) >> \
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32) >> \
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(OD_ILOG(_d) - 1))
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#define OD_DIVU(_x, _d) \
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(((_d) < OD_DIVU_DMAX) ? (OD_DIVU_SMALL((_x), (_d))) : ((_x) / (_d)))
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#define OD_MINI AOMMIN
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#define OD_MAXI AOMMAX
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#define OD_CLAMPI(min, val, max) clamp((val), (min), (max))
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#define OD_CLZ0 (1)
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#define OD_CLZ(x) (-get_msb(x))
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#define OD_ILOG_NZ(x) (OD_CLZ0 - OD_CLZ(x))
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/*Note that __builtin_clz is not defined when x == 0, according to the gcc
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documentation (and that of the x86 BSR instruction that implements it), so
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we have to special-case it.
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We define a special version of the macro to use when x can be zero.*/
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#define OD_ILOG(x) ((x) ? OD_ILOG_NZ(x) : 0)
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#define OD_LOG2 AOMLOG2
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/*Enable special features for gcc and compatible compilers.*/
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#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
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#define OD_GNUC_PREREQ(maj, min, pat) \
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((__GNUC__ << 16) + (__GNUC_MINOR__ << 8) + __GNUC_PATCHLEVEL__ >= \
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((maj) << 16) + ((min) << 8) + pat) // NOLINT
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#else
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#define OD_GNUC_PREREQ(maj, min, pat) (0)
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#endif
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#if OD_GNUC_PREREQ(3, 4, 0)
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#define OD_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
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#else
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#define OD_WARN_UNUSED_RESULT
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#endif
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#if OD_GNUC_PREREQ(3, 4, 0)
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#define OD_ARG_NONNULL(x) __attribute__((__nonnull__(x)))
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#else
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#define OD_ARG_NONNULL(x)
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#endif
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#if defined(OD_ENABLE_ASSERTIONS)
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#if OD_GNUC_PREREQ(2, 5, 0)
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__attribute__((noreturn))
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#endif
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void od_fatal_impl(const char *_str, const char *_file, int _line);
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#define OD_FATAL(_str) (od_fatal_impl(_str, __FILE__, __LINE__))
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#define OD_ASSERT(_cond) \
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do { \
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if (!(_cond)) { \
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OD_FATAL("assertion failed: " #_cond); \
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} \
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} while (0)
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#define OD_ASSERT2(_cond, _message) \
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do { \
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if (!(_cond)) { \
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OD_FATAL("assertion failed: " #_cond "\n" _message); \
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} \
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} while (0)
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#define OD_ALWAYS_TRUE(_cond) OD_ASSERT(_cond)
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#else
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#define OD_ASSERT(_cond)
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#define OD_ASSERT2(_cond, _message)
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#define OD_ALWAYS_TRUE(_cond) ((void)(_cond))
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#endif
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/** Copy n elements of memory from src to dst. The 0* term provides
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compile-time type checking */
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#if !defined(OVERRIDE_OD_COPY)
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#define OD_COPY(dst, src, n) \
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(memcpy((dst), (src), sizeof(*(dst)) * (n) + 0 * ((dst) - (src))))
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#endif
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/** Copy n elements of memory from src to dst, allowing overlapping regions.
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The 0* term provides compile-time type checking */
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#if !defined(OVERRIDE_OD_MOVE)
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#define OD_MOVE(dst, src, n) \
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(memmove((dst), (src), sizeof(*(dst)) * (n) + 0 * ((dst) - (src))))
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#endif
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AV1_COMMON_ODINTRIN_H_
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