/* * 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_AOM_PORTS_MEM_OPS_H_ #define AOM_AOM_PORTS_MEM_OPS_H_ /* \file * \brief Provides portable memory access primitives * * This function provides portable primitives for getting and setting of * signed and unsigned integers in 16, 24, and 32 bit sizes. The operations * can be performed on unaligned data regardless of hardware support for * unaligned accesses. * * The type used to pass the integral values may be changed by defining * MEM_VALUE_T with the appropriate type. The type given must be an integral * numeric type. * * The actual functions instantiated have the MEM_VALUE_T type name pasted * on to the symbol name. This allows the developer to instantiate these * operations for multiple types within the same translation unit. This is * of somewhat questionable utility, but the capability exists nonetheless. * Users not making use of this functionality should call the functions * without the type name appended, and the preprocessor will take care of * it. * * NOTE: This code is not supported on platforms where char > 1 octet ATM. */ #ifndef MAU_T /* Minimum Access Unit for this target */ #define MAU_T … #endif #ifndef MEM_VALUE_T #define MEM_VALUE_T … #endif #undef MEM_VALUE_T_SZ_BITS #define MEM_VALUE_T_SZ_BITS … #undef mem_ops_wrap_symbol #define mem_ops_wrap_symbol(fn) … #undef mem_ops_wrap_symbol2 #define mem_ops_wrap_symbol2(fn, typ) … #undef mem_ops_wrap_symbol3 #define mem_ops_wrap_symbol3(fn, typ) … /* * Include aligned access routines */ #define INCLUDED_BY_MEM_OPS_H #include "mem_ops_aligned.h" #undef INCLUDED_BY_MEM_OPS_H #undef mem_get_be16 #define mem_get_be16 … static unsigned MEM_VALUE_T mem_get_be16(const void *vmem) { … } #undef mem_get_be24 #define mem_get_be24 … static unsigned MEM_VALUE_T mem_get_be24(const void *vmem) { … } #undef mem_get_be32 #define mem_get_be32 … static unsigned MEM_VALUE_T mem_get_be32(const void *vmem) { … } #undef mem_get_le16 #define mem_get_le16 … static unsigned MEM_VALUE_T mem_get_le16(const void *vmem) { … } #undef mem_get_le24 #define mem_get_le24 … static unsigned MEM_VALUE_T mem_get_le24(const void *vmem) { … } #undef mem_get_le32 #define mem_get_le32 … static unsigned MEM_VALUE_T mem_get_le32(const void *vmem) { … } #define mem_get_s_generic(end, sz) … /* clang-format off */ #undef mem_get_sbe16 #define mem_get_sbe16 … mem_get_s_generic(…) #undef mem_get_sbe24 #define mem_get_sbe24 … mem_get_s_generic(…) #undef mem_get_sbe32 #define mem_get_sbe32 … mem_get_s_generic(…) #undef mem_get_sle16 #define mem_get_sle16 … mem_get_s_generic(…) #undef mem_get_sle24 #define mem_get_sle24 … mem_get_s_generic(…) #undef mem_get_sle32 #define mem_get_sle32 … mem_get_s_generic(…) #undef mem_put_be16 #define mem_put_be16 … static inline void mem_put_be16(void *vmem, MEM_VALUE_T val) { … } #undef mem_put_be24 #define mem_put_be24 … static inline void mem_put_be24(void *vmem, MEM_VALUE_T val) { … } #undef mem_put_be32 #define mem_put_be32 … static inline void mem_put_be32(void *vmem, MEM_VALUE_T val) { … } #undef mem_put_le16 #define mem_put_le16 … static inline void mem_put_le16(void *vmem, MEM_VALUE_T val) { … } #undef mem_put_le24 #define mem_put_le24 … static inline void mem_put_le24(void *vmem, MEM_VALUE_T val) { … } #undef mem_put_le32 #define mem_put_le32 … static inline void mem_put_le32(void *vmem, MEM_VALUE_T val) { … } /* clang-format on */ #endif // AOM_AOM_PORTS_MEM_OPS_H_
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