| /* |
| * This file is part of Libav. |
| * |
| * Libav 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. |
| * |
| * Libav 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 Libav; 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 |
| |
| /* |
| * The AV_COPYxxU macros are suitable for copying data to/from unaligned |
| * memory locations. |
| */ |
| |
| #define AV_COPYU(n, d, s) AV_WN##n(d, AV_RN##n(s)); |
| |
| #ifndef AV_COPY16U |
| # define AV_COPY16U(d, s) AV_COPYU(16, d, s) |
| #endif |
| |
| #ifndef AV_COPY32U |
| # define AV_COPY32U(d, s) AV_COPYU(32, d, s) |
| #endif |
| |
| #ifndef AV_COPY64U |
| # define AV_COPY64U(d, s) AV_COPYU(64, d, s) |
| #endif |
| |
| #ifndef AV_COPY128U |
| # define AV_COPY128U(d, s) \ |
| do { \ |
| AV_COPY64U(d, s); \ |
| AV_COPY64U((char *)(d) + 8, (const char *)(s) + 8); \ |
| } while(0) |
| #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 */ |
