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268 lines
8.1 KiB
268 lines
8.1 KiB
/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVUTIL_INTREADWRITE_H |
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#define AVUTIL_INTREADWRITE_H |
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#include <stdint.h> |
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#include "config.h" |
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#include "bswap.h" |
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/* |
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* Arch-specific headers can provide any combination of |
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* AV_[RW][BLN](16|32|64) macros. Preprocessor symbols must be |
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* defined, even if these are implemented as inline functions. |
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*/ |
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#if ARCH_ARM |
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# include "arm/intreadwrite.h" |
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#elif ARCH_MIPS |
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# include "mips/intreadwrite.h" |
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#elif ARCH_PPC |
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# include "ppc/intreadwrite.h" |
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#endif |
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/* |
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* Define AV_[RW]N helper macros to simplify definitions not provided |
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* by per-arch headers. |
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*/ |
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#if HAVE_ATTRIBUTE_PACKED |
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struct unaligned_64 { uint64_t l; } __attribute__((packed)); |
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struct unaligned_32 { uint32_t l; } __attribute__((packed)); |
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struct unaligned_16 { uint16_t l; } __attribute__((packed)); |
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# define AV_RN(s, p) (((const struct unaligned_##s *) (p))->l) |
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# define AV_WN(s, p, v) (((struct unaligned_##s *) (p))->l) = (v) |
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#elif defined(__DECC) |
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# define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p))) |
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# define AV_WN(s, p, v) *((__unaligned uint##s##_t*)(p)) = (v) |
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#elif HAVE_FAST_UNALIGNED |
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# define AV_RN(s, p) (*((const uint##s##_t*)(p))) |
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# define AV_WN(s, p, v) *((uint##s##_t*)(p)) = (v) |
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#else |
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#ifndef AV_RB16 |
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#define AV_RB16(x) ((((const uint8_t*)(x))[0] << 8) | \ |
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((const uint8_t*)(x))[1]) |
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#endif |
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#ifndef AV_WB16 |
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#define AV_WB16(p, d) do { \ |
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((uint8_t*)(p))[1] = (d); \ |
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((uint8_t*)(p))[0] = (d)>>8; } while(0) |
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#endif |
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#ifndef AV_RL16 |
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#define AV_RL16(x) ((((const uint8_t*)(x))[1] << 8) | \ |
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((const uint8_t*)(x))[0]) |
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#endif |
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#ifndef AV_WL16 |
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#define AV_WL16(p, d) do { \ |
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((uint8_t*)(p))[0] = (d); \ |
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((uint8_t*)(p))[1] = (d)>>8; } while(0) |
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#endif |
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#ifndef AV_RB32 |
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#define AV_RB32(x) ((((const uint8_t*)(x))[0] << 24) | \ |
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(((const uint8_t*)(x))[1] << 16) | \ |
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(((const uint8_t*)(x))[2] << 8) | \ |
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((const uint8_t*)(x))[3]) |
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#endif |
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#ifndef AV_WB32 |
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#define AV_WB32(p, d) do { \ |
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((uint8_t*)(p))[3] = (d); \ |
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((uint8_t*)(p))[2] = (d)>>8; \ |
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((uint8_t*)(p))[1] = (d)>>16; \ |
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((uint8_t*)(p))[0] = (d)>>24; } while(0) |
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#endif |
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#ifndef AV_RL32 |
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#define AV_RL32(x) ((((const uint8_t*)(x))[3] << 24) | \ |
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(((const uint8_t*)(x))[2] << 16) | \ |
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(((const uint8_t*)(x))[1] << 8) | \ |
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((const uint8_t*)(x))[0]) |
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#endif |
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#ifndef AV_WL32 |
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#define AV_WL32(p, d) do { \ |
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((uint8_t*)(p))[0] = (d); \ |
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((uint8_t*)(p))[1] = (d)>>8; \ |
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((uint8_t*)(p))[2] = (d)>>16; \ |
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((uint8_t*)(p))[3] = (d)>>24; } while(0) |
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#endif |
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#ifndef AV_RB64 |
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#define AV_RB64(x) (((uint64_t)((const uint8_t*)(x))[0] << 56) | \ |
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((uint64_t)((const uint8_t*)(x))[1] << 48) | \ |
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((uint64_t)((const uint8_t*)(x))[2] << 40) | \ |
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((uint64_t)((const uint8_t*)(x))[3] << 32) | \ |
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((uint64_t)((const uint8_t*)(x))[4] << 24) | \ |
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((uint64_t)((const uint8_t*)(x))[5] << 16) | \ |
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((uint64_t)((const uint8_t*)(x))[6] << 8) | \ |
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(uint64_t)((const uint8_t*)(x))[7]) |
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#endif |
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#ifndef AV_WB64 |
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#define AV_WB64(p, d) do { \ |
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((uint8_t*)(p))[7] = (d); \ |
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((uint8_t*)(p))[6] = (d)>>8; \ |
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((uint8_t*)(p))[5] = (d)>>16; \ |
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((uint8_t*)(p))[4] = (d)>>24; \ |
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((uint8_t*)(p))[3] = (d)>>32; \ |
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((uint8_t*)(p))[2] = (d)>>40; \ |
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((uint8_t*)(p))[1] = (d)>>48; \ |
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((uint8_t*)(p))[0] = (d)>>56; } while(0) |
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#endif |
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#ifndef AV_RL64 |
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#define AV_RL64(x) (((uint64_t)((const uint8_t*)(x))[7] << 56) | \ |
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((uint64_t)((const uint8_t*)(x))[6] << 48) | \ |
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((uint64_t)((const uint8_t*)(x))[5] << 40) | \ |
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((uint64_t)((const uint8_t*)(x))[4] << 32) | \ |
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((uint64_t)((const uint8_t*)(x))[3] << 24) | \ |
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((uint64_t)((const uint8_t*)(x))[2] << 16) | \ |
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((uint64_t)((const uint8_t*)(x))[1] << 8) | \ |
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(uint64_t)((const uint8_t*)(x))[0]) |
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#endif |
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#ifndef AV_WL64 |
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#define AV_WL64(p, d) do { \ |
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((uint8_t*)(p))[0] = (d); \ |
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((uint8_t*)(p))[1] = (d)>>8; \ |
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((uint8_t*)(p))[2] = (d)>>16; \ |
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((uint8_t*)(p))[3] = (d)>>24; \ |
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((uint8_t*)(p))[4] = (d)>>32; \ |
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((uint8_t*)(p))[5] = (d)>>40; \ |
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((uint8_t*)(p))[6] = (d)>>48; \ |
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((uint8_t*)(p))[7] = (d)>>56; } while(0) |
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#endif |
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#if HAVE_BIGENDIAN |
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# define AV_RN(s, p) AV_RB##s(p) |
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# define AV_WN(s, p, v) AV_WB##s(p, v) |
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#else |
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# define AV_RN(s, p) AV_RL##s(p) |
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# define AV_WN(s, p, v) AV_WL##s(p, v) |
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#endif |
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#endif /* HAVE_FAST_UNALIGNED */ |
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#ifndef AV_RN16 |
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# define AV_RN16(p) AV_RN(16, p) |
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#endif |
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#ifndef AV_RN32 |
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# define AV_RN32(p) AV_RN(32, p) |
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#endif |
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#ifndef AV_RN64 |
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# define AV_RN64(p) AV_RN(64, p) |
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#endif |
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#ifndef AV_WN16 |
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# define AV_WN16(p, v) AV_WN(16, p, v) |
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#endif |
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#ifndef AV_WN32 |
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# define AV_WN32(p, v) AV_WN(32, p, v) |
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#endif |
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#ifndef AV_WN64 |
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# define AV_WN64(p, v) AV_WN(64, p, v) |
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#endif |
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#if HAVE_BIGENDIAN |
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# define AV_RB(s, p) AV_RN(s, p) |
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# define AV_WB(s, p, v) AV_WN(s, p, v) |
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# define AV_RL(s, p) bswap_##s(AV_RN(s, p)) |
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# define AV_WL(s, p, v) AV_WN(s, p, bswap_##s(v)) |
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#else |
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# define AV_RB(s, p) bswap_##s(AV_RN(s, p)) |
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# define AV_WB(s, p, v) AV_WN(s, p, bswap_##s(v)) |
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# define AV_RL(s, p) AV_RN(s, p) |
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# define AV_WL(s, p, v) AV_WN(s, p, v) |
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#endif |
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#define AV_RB8(x) (((const uint8_t*)(x))[0]) |
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#define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0) |
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#define AV_RL8(x) AV_RB8(x) |
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#define AV_WL8(p, d) AV_WB8(p, d) |
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#ifndef AV_RB16 |
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# define AV_RB16(p) AV_RB(16, p) |
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#endif |
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#ifndef AV_WB16 |
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# define AV_WB16(p, v) AV_WB(16, p, v) |
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#endif |
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#ifndef AV_RL16 |
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# define AV_RL16(p) AV_RL(16, p) |
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#endif |
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#ifndef AV_WL16 |
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# define AV_WL16(p, v) AV_WL(16, p, v) |
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#endif |
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#ifndef AV_RB32 |
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# define AV_RB32(p) AV_RB(32, p) |
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#endif |
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#ifndef AV_WB32 |
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# define AV_WB32(p, v) AV_WB(32, p, v) |
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#endif |
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#ifndef AV_RL32 |
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# define AV_RL32(p) AV_RL(32, p) |
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#endif |
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#ifndef AV_WL32 |
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# define AV_WL32(p, v) AV_WL(32, p, v) |
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#endif |
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#ifndef AV_RB64 |
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# define AV_RB64(p) AV_RB(64, p) |
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#endif |
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#ifndef AV_WB64 |
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# define AV_WB64(p, v) AV_WB(64, p, v) |
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#endif |
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#ifndef AV_RL64 |
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# define AV_RL64(p) AV_RL(64, p) |
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#endif |
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#ifndef AV_WL64 |
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# define AV_WL64(p, v) AV_WL(64, p, v) |
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#endif |
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#define AV_RB24(x) ((((const uint8_t*)(x))[0] << 16) | \ |
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(((const uint8_t*)(x))[1] << 8) | \ |
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((const uint8_t*)(x))[2]) |
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#define AV_WB24(p, d) do { \ |
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((uint8_t*)(p))[2] = (d); \ |
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((uint8_t*)(p))[1] = (d)>>8; \ |
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((uint8_t*)(p))[0] = (d)>>16; } while(0) |
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#define AV_RL24(x) ((((const uint8_t*)(x))[2] << 16) | \ |
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(((const uint8_t*)(x))[1] << 8) | \ |
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((const uint8_t*)(x))[0]) |
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#define AV_WL24(p, d) do { \ |
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((uint8_t*)(p))[0] = (d); \ |
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((uint8_t*)(p))[1] = (d)>>8; \ |
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((uint8_t*)(p))[2] = (d)>>16; } while(0) |
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#endif /* AVUTIL_INTREADWRITE_H */
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