/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVUTIL_INTREADWRITE_H#define AVUTIL_INTREADWRITE_H #include <stdint.h>#include "libavutil/avconfig.h"#include "attributes.h"#include "bswap.h" typedef union {    uint64_t u64;    uint32_t u32[2];    uint16_t u16[4];    uint8_t  u8 [8];    double   f64;    float    f32[2];} av_alias av_alias64; typedef union {    uint32_t u32;    uint16_t u16[2];    uint8_t  u8 [4];    float    f32;} av_alias av_alias32; typedef union {    uint16_t u16;    uint8_t  u8 [2];} av_alias av_alias16; /* * Arch-specific headers can provide any combination of * AV_[RW][BLN](16|24|32|48|64) and AV_(COPY|SWAP|ZERO)(64|128) macros. * Preprocessor symbols must be defined, even if these are implemented * as inline functions. * * R/W means read/write, B/L/N means big/little/native endianness. * The following macros require aligned access, compared to their * unaligned variants: AV_(COPY|SWAP|ZERO)(64|128), AV_[RW]N[8-64]A. * Incorrect usage may range from abysmal performance to crash * depending on the platform. * * The unaligned variants are AV_[RW][BLN][8-64] and AV_COPY*U. */ #ifdef HAVE_AV_CONFIG_H #include "config.h" #if   ARCH_ARM#   include "arm/intreadwrite.h"#elif ARCH_AVR32#   include "avr32/intreadwrite.h"#elif ARCH_MIPS#   include "mips/intreadwrite.h"#elif ARCH_PPC#   include "ppc/intreadwrite.h"#elif ARCH_TOMI#   include "tomi/intreadwrite.h"#elif ARCH_X86#   include "x86/intreadwrite.h"#endif #endif /* HAVE_AV_CONFIG_H */ /* * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers. */ #if AV_HAVE_BIGENDIAN #   if    defined(AV_RN16) && !defined(AV_RB16)#       define AV_RB16(p) AV_RN16(p)#   elif !defined(AV_RN16) &&  defined(AV_RB16)#       define AV_RN16(p) AV_RB16(p)#   endif #   if    defined(AV_WN16) && !defined(AV_WB16)#       define AV_WB16(p, v) AV_WN16(p, v)#   elif !defined(AV_WN16) &&  defined(AV_WB16)#       define AV_WN16(p, v) AV_WB16(p, v)#   endif #   if    defined(AV_RN24) && !defined(AV_RB24)#       define AV_RB24(p) AV_RN24(p)#   elif !defined(AV_RN24) &&  defined(AV_RB24)#       define AV_RN24(p) AV_RB24(p)#   endif #   if    defined(AV_WN24) && !defined(AV_WB24)#       define AV_WB24(p, v) AV_WN24(p, v)#   elif !defined(AV_WN24) &&  defined(AV_WB24)#       define AV_WN24(p, v) AV_WB24(p, v)#   endif #   if    defined(AV_RN32) && !defined(AV_RB32)#       define AV_RB32(p) AV_RN32(p)#   elif !defined(AV_RN32) &&  defined(AV_RB32)#       define AV_RN32(p) AV_RB32(p)#   endif #   if    defined(AV_WN32) && !defined(AV_WB32)#       define AV_WB32(p, v) AV_WN32(p, v)#   elif !defined(AV_WN32) &&  defined(AV_WB32)#       define AV_WN32(p, v) AV_WB32(p, v)#   endif #   if    defined(AV_RN48) && !defined(AV_RB48)#       define AV_RB48(p) AV_RN48(p)#   elif !defined(AV_RN48) &&  defined(AV_RB48)#       define AV_RN48(p) AV_RB48(p)#   endif #   if    defined(AV_WN48) && !defined(AV_WB48)#       define AV_WB48(p, v) AV_WN48(p, v)#   elif !defined(AV_WN48) &&  defined(AV_WB48)#       define AV_WN48(p, v) AV_WB48(p, v)#   endif #   if    defined(AV_RN64) && !defined(AV_RB64)#       define AV_RB64(p) AV_RN64(p)#   elif !defined(AV_RN64) &&  defined(AV_RB64)#       define AV_RN64(p) AV_RB64(p)#   endif #   if    defined(AV_WN64) && !defined(AV_WB64)#       define AV_WB64(p, v) AV_WN64(p, v)#   elif !defined(AV_WN64) &&  defined(AV_WB64)#       define AV_WN64(p, v) AV_WB64(p, v)#   endif #else /* AV_HAVE_BIGENDIAN */ #   if    defined(AV_RN16) && !defined(AV_RL16)#       define AV_RL16(p) AV_RN16(p)#   elif !defined(AV_RN16) &&  defined(AV_RL16)#       define AV_RN16(p) AV_RL16(p)#   endif #   if    defined(AV_WN16) && !defined(AV_WL16)#       define AV_WL16(p, v) AV_WN16(p, v)#   elif !defined(AV_WN16) &&  defined(AV_WL16)#       define AV_WN16(p, v) AV_WL16(p, v)#   endif #   if    defined(AV_RN24) && !defined(AV_RL24)#       define AV_RL24(p) AV_RN24(p)#   elif !defined(AV_RN24) &&  defined(AV_RL24)#       define AV_RN24(p) AV_RL24(p)#   endif #   if    defined(AV_WN24) && !defined(AV_WL24)#       define AV_WL24(p, v) AV_WN24(p, v)#   elif !defined(AV_WN24) &&  defined(AV_WL24)#       define AV_WN24(p, v) AV_WL24(p, v)#   endif #   if    defined(AV_RN32) && !defined(AV_RL32)#       define AV_RL32(p) AV_RN32(p)#   elif !defined(AV_RN32) &&  defined(AV_RL32)#       define AV_RN32(p) AV_RL32(p)#   endif #   if    defined(AV_WN32) && !defined(AV_WL32)#       define AV_WL32(p, v) AV_WN32(p, v)#   elif !defined(AV_WN32) &&  defined(AV_WL32)#       define AV_WN32(p, v) AV_WL32(p, v)#   endif #   if    defined(AV_RN48) && !defined(AV_RL48)#       define AV_RL48(p) AV_RN48(p)#   elif !defined(AV_RN48) &&  defined(AV_RL48)#       define AV_RN48(p) AV_RL48(p)#   endif #   if    defined(AV_WN48) && !defined(AV_WL48)#       define AV_WL48(p, v) AV_WN48(p, v)#   elif !defined(AV_WN48) &&  defined(AV_WL48)#       define AV_WN48(p, v) AV_WL48(p, v)#   endif #   if    defined(AV_RN64) && !defined(AV_RL64)#       define AV_RL64(p) AV_RN64(p)#   elif !defined(AV_RN64) &&  defined(AV_RL64)#       define AV_RN64(p) AV_RL64(p)#   endif #   if    defined(AV_WN64) && !defined(AV_WL64)#       define AV_WL64(p, v) AV_WN64(p, v)#   elif !defined(AV_WN64) &&  defined(AV_WL64)#       define AV_WN64(p, v) AV_WL64(p, v)#   endif #endif /* !AV_HAVE_BIGENDIAN */ /* * Define AV_[RW]N helper macros to simplify definitions not provided * by per-arch headers. */ #if defined(__GNUC__) && !defined(__TI_COMPILER_VERSION__) union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias; #   define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)#   define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v)) #elif defined(__DECC) #   define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))#   define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v)) #elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_X64)) && AV_HAVE_FAST_UNALIGNED #   define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))#   define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v)) #elif AV_HAVE_FAST_UNALIGNED #   define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)#   define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v)) #else #ifndef AV_RB16#   define AV_RB16(x)                           \    ((((const uint8_t*)(x))[0] << 8) |          \      ((const uint8_t*)(x))[1])#endif#ifndef AV_WB16#   define AV_WB16(p, val) do {                 \        uint16_t d = (val);                     \        ((uint8_t*)(p))[1] = (d);               \        ((uint8_t*)(p))[0] = (d)>>8;            \    } while(0)#endif #ifndef AV_RL16#   define AV_RL16(x)                           \    ((((const uint8_t*)(x))[1] << 8) |          \      ((const uint8_t*)(x))[0])#endif#ifndef AV_WL16#   define AV_WL16(p, val) do {                 \        uint16_t d = (val);                     \        ((uint8_t*)(p))[0] = (d);               \        ((uint8_t*)(p))[1] = (d)>>8;            \    } while(0)#endif #ifndef AV_RB32#   define AV_RB32(x)                                \    (((uint32_t)((const uint8_t*)(x))[0] << 24) |    \               (((const uint8_t*)(x))[1] << 16) |    \               (((const uint8_t*)(x))[2] <<  8) |    \                ((const uint8_t*)(x))[3])#endif#ifndef AV_WB32#   define AV_WB32(p, val) do {                 \        uint32_t d = (val);                     \        ((uint8_t*)(p))[3] = (d);               \        ((uint8_t*)(p))[2] = (d)>>8;            \        ((uint8_t*)(p))[1] = (d)>>16;           \        ((uint8_t*)(p))[0] = (d)>>24;           \    } while(0)#endif #ifndef AV_RL32#   define AV_RL32(x)                                \    (((uint32_t)((const uint8_t*)(x))[3] << 24) |    \               (((const uint8_t*)(x))[2] << 16) |    \               (((const uint8_t*)(x))[1] <<  8) |    \                ((const uint8_t*)(x))[0])#endif#ifndef AV_WL32#   define AV_WL32(p, val) do {                 \        uint32_t d = (val);                     \        ((uint8_t*)(p))[0] = (d);               \        ((uint8_t*)(p))[1] = (d)>>8;            \        ((uint8_t*)(p))[2] = (d)>>16;           \        ((uint8_t*)(p))[3] = (d)>>24;           \    } while(0)#endif #ifndef AV_RB64#   define AV_RB64(x)                                   \    (((uint64_t)((const uint8_t*)(x))[0] << 56) |       \     ((uint64_t)((const uint8_t*)(x))[1] << 48) |       \     ((uint64_t)((const uint8_t*)(x))[2] << 40) |       \     ((uint64_t)((const uint8_t*)(x))[3] << 32) |       \     ((uint64_t)((const uint8_t*)(x))[4] << 24) |       \     ((uint64_t)((const uint8_t*)(x))[5] << 16) |       \     ((uint64_t)((const uint8_t*)(x))[6] <<  8) |       \      (uint64_t)((const uint8_t*)(x))[7])#endif#ifndef AV_WB64#   define AV_WB64(p, val) do {                 \        uint64_t d = (val);                     \        ((uint8_t*)(p))[7] = (d);               \        ((uint8_t*)(p))[6] = (d)>>8;            \        ((uint8_t*)(p))[5] = (d)>>16;           \        ((uint8_t*)(p))[4] = (d)>>24;           \        ((uint8_t*)(p))[3] = (d)>>32;           \        ((uint8_t*)(p))[2] = (d)>>40;           \        ((uint8_t*)(p))[1] = (d)>>48;           \        ((uint8_t*)(p))[0] = (d)>>56;           \    } while(0)#endif #ifndef AV_RL64#   define AV_RL64(x)                                   \    (((uint64_t)((const uint8_t*)(x))[7] << 56) |       \     ((uint64_t)((const uint8_t*)(x))[6] << 48) |       \     ((uint64_t)((const uint8_t*)(x))[5] << 40) |       \     ((uint64_t)((const uint8_t*)(x))[4] << 32) |       \     ((uint64_t)((const uint8_t*)(x))[3] << 24) |       \     ((uint64_t)((const uint8_t*)(x))[2] << 16) |       \     ((uint64_t)((const uint8_t*)(x))[1] <<  8) |       \      (uint64_t)((const uint8_t*)(x))[0])#endif#ifndef AV_WL64#   define AV_WL64(p, val) do {                 \        uint64_t d = (val);                     \        ((uint8_t*)(p))[0] = (d);               \        ((uint8_t*)(p))[1] = (d)>>8;            \        ((uint8_t*)(p))[2] = (d)>>16;           \        ((uint8_t*)(p))[3] = (d)>>24;           \        ((uint8_t*)(p))[4] = (d)>>32;           \        ((uint8_t*)(p))[5] = (d)>>40;           \        ((uint8_t*)(p))[6] = (d)>>48;           \        ((uint8_t*)(p))[7] = (d)>>56;           \    } while(0)#endif #if AV_HAVE_BIGENDIAN#   define AV_RN(s, p)    AV_RB##s(p)#   define AV_WN(s, p, v) AV_WB##s(p, v)#else#   define AV_RN(s, p)    AV_RL##s(p)#   define AV_WN(s, p, v) AV_WL##s(p, v)#endif #endif /* HAVE_FAST_UNALIGNED */ #ifndef AV_RN16#   define AV_RN16(p) AV_RN(16, p)#endif #ifndef AV_RN32#   define AV_RN32(p) AV_RN(32, p)#endif #ifndef AV_RN64#   define AV_RN64(p) AV_RN(64, p)#endif #ifndef AV_WN16#   define AV_WN16(p, v) AV_WN(16, p, v)#endif #ifndef AV_WN32#   define AV_WN32(p, v) AV_WN(32, p, v)#endif #ifndef AV_WN64#   define AV_WN64(p, v) AV_WN(64, p, v)#endif #if AV_HAVE_BIGENDIAN#   define AV_RB(s, p)    AV_RN##s(p)#   define AV_WB(s, p, v) AV_WN##s(p, v)#   define AV_RL(s, p)    av_bswap##s(AV_RN##s(p))#   define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))#else#   define AV_RB(s, p)    av_bswap##s(AV_RN##s(p))#   define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))#   define AV_RL(s, p)    AV_RN##s(p)#   define AV_WL(s, p, v) AV_WN##s(p, v)#endif #define AV_RB8(x)     (((const uint8_t*)(x))[0])#define AV_WB8(p, d)  do { ((uint8_t*)(p))[0] = (d); } while(0) #define AV_RL8(x)     AV_RB8(x)#define AV_WL8(p, d)  AV_WB8(p, d) #ifndef AV_RB16#   define AV_RB16(p)    AV_RB(16, p)#endif#ifndef AV_WB16#   define AV_WB16(p, v) AV_WB(16, p, v)#endif #ifndef AV_RL16#   define AV_RL16(p)    AV_RL(16, p)#endif#ifndef AV_WL16#   define AV_WL16(p, v) AV_WL(16, p, v)#endif #ifndef AV_RB32#   define AV_RB32(p)    AV_RB(32, p)#endif#ifndef AV_WB32#   define AV_WB32(p, v) AV_WB(32, p, v)#endif #ifndef AV_RL32#   define AV_RL32(p)    AV_RL(32, p)#endif#ifndef AV_WL32#   define AV_WL32(p, v) AV_WL(32, p, v)#endif #ifndef AV_RB64#   define AV_RB64(p)    AV_RB(64, p)#endif#ifndef AV_WB64#   define AV_WB64(p, v) AV_WB(64, p, v)#endif #ifndef AV_RL64#   define AV_RL64(p)    AV_RL(64, p)#endif#ifndef AV_WL64#   define AV_WL64(p, v) AV_WL(64, p, v)#endif #ifndef AV_RB24#   define AV_RB24(x)                           \    ((((const uint8_t*)(x))[0] << 16) |         \     (((const uint8_t*)(x))[1] <<  8) |         \      ((const uint8_t*)(x))[2])#endif#ifndef AV_WB24#   define AV_WB24(p, d) do {                   \        ((uint8_t*)(p))[2] = (d);               \        ((uint8_t*)(p))[1] = (d)>>8;            \        ((uint8_t*)(p))[0] = (d)>>16;           \    } while(0)#endif #ifndef AV_RL24#   define AV_RL24(x)                           \    ((((const uint8_t*)(x))[2] << 16) |         \     (((const uint8_t*)(x))[1] <<  8) |         \      ((const uint8_t*)(x))[0])#endif#ifndef AV_WL24#   define AV_WL24(p, d) do {                   \        ((uint8_t*)(p))[0] = (d);               \        ((uint8_t*)(p))[1] = (d)>>8;            \        ((uint8_t*)(p))[2] = (d)>>16;           \    } while(0)#endif #ifndef AV_RB48#   define AV_RB48(x)                                     \    (((uint64_t)((const uint8_t*)(x))[0] << 40) |         \     ((uint64_t)((const uint8_t*)(x))[1] << 32) |         \     ((uint64_t)((const uint8_t*)(x))[2] << 24) |         \     ((uint64_t)((const uint8_t*)(x))[3] << 16) |         \     ((uint64_t)((const uint8_t*)(x))[4] <<  8) |         \      (uint64_t)((const uint8_t*)(x))[5])#endif#ifndef AV_WB48#   define AV_WB48(p, darg) do {                \        uint64_t d = (darg);                    \        ((uint8_t*)(p))[5] = (d);               \        ((uint8_t*)(p))[4] = (d)>>8;            \        ((uint8_t*)(p))[3] = (d)>>16;           \        ((uint8_t*)(p))[2] = (d)>>24;           \        ((uint8_t*)(p))[1] = (d)>>32;           \        ((uint8_t*)(p))[0] = (d)>>40;           \    } while(0)#endif #ifndef AV_RL48#   define AV_RL48(x)                                     \    (((uint64_t)((const uint8_t*)(x))[5] << 40) |         \     ((uint64_t)((const uint8_t*)(x))[4] << 32) |         \

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