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- /*
- * 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|64) and AV_(COPY|SWAP|ZERO)(64|128) macros.
- * Preprocessor symbols must be defined, even if these are implemented
- * as inline functions.
- */
- #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_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_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 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, d) do { \
- ((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, d) do { \
- ((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, d) do { \
- ((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, d) do { \
- ((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, d) do { \
- ((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, d) do { \
- ((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
- /*
- * The AV_[RW]NA macros access naturally aligned data
- * in a type-safe way.
- */
- #define AV_RNA(s, p) (((const av_alias##s*)(p))->u##s)
- #define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))
- #ifndef AV_RN16A
- # define AV_RN16A(p) AV_RNA(16, p)
- #endif
- #ifndef AV_RN32A
- # define AV_RN32A(p) AV_RNA(32, p)
- #endif
- #ifndef AV_RN64A
- # define AV_RN64A(p) AV_RNA(64, p)
- #endif
- #ifndef AV_WN16A
- # define AV_WN16A(p, v) AV_WNA(16, p, v)
- #endif
- #ifndef AV_WN32A
- # define AV_WN32A(p, v) AV_WNA(32, p, v)
- #endif
- #ifndef AV_WN64A
- # define AV_WN64A(p, v) AV_WNA(64, p, v)
- #endif
- /* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
- * naturally aligned. They may be implemented using MMX,
- * so emms_c() must be called before using any float code
- * afterwards.
- */
- #define AV_COPY(n, d, s) \
- (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
- #ifndef AV_COPY16
- # define AV_COPY16(d, s) AV_COPY(16, d, s)
- #endif
- #ifndef AV_COPY32
- # define AV_COPY32(d, s) AV_COPY(32, d, s)
- #endif
- #ifndef AV_COPY64
- # define AV_COPY64(d, s) AV_COPY(64, d, s)
- #endif
- #ifndef AV_COPY128
- # define AV_COPY128(d, s) \
- do { \
- AV_COPY64(d, s); \
- AV_COPY64((char*)(d)+8, (char*)(s)+8); \
- } while(0)
- #endif
- #define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))
- #ifndef AV_SWAP64
- # define AV_SWAP64(a, b) AV_SWAP(64, a, b)
- #endif
- #define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)
- #ifndef AV_ZERO16
- # define AV_ZERO16(d) AV_ZERO(16, d)
- #endif
- #ifndef AV_ZERO32
- # define AV_ZERO32(d) AV_ZERO(32, d)
- #endif
- #ifndef AV_ZERO64
- # define AV_ZERO64(d) AV_ZERO(64, d)
- #endif
- #ifndef AV_ZERO128
- # define AV_ZERO128(d) \
- do { \
- AV_ZERO64(d); \
- AV_ZERO64((char*)(d)+8); \
- } while(0)
- #endif
- #endif /* AVUTIL_INTREADWRITE_H */
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