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189 lines
7.3 KiB
189 lines
7.3 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 FFMPEG_INTREADWRITE_H |
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#define FFMPEG_INTREADWRITE_H |
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#include <stdint.h> |
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#include "bswap.h" |
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#ifdef __GNUC__ |
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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_RN16(a) (((const struct unaligned_16 *) (a))->l) |
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#define AV_RN32(a) (((const struct unaligned_32 *) (a))->l) |
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#define AV_RN64(a) (((const struct unaligned_64 *) (a))->l) |
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#define AV_WN16(a, b) (((struct unaligned_16 *) (a))->l) = (b) |
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#define AV_WN32(a, b) (((struct unaligned_32 *) (a))->l) = (b) |
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#define AV_WN64(a, b) (((struct unaligned_64 *) (a))->l) = (b) |
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#else /* __GNUC__ */ |
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#define AV_RN16(a) (*((const uint16_t*)(a))) |
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#define AV_RN32(a) (*((const uint32_t*)(a))) |
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#define AV_RN64(a) (*((const uint64_t*)(a))) |
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#define AV_WN16(a, b) *((uint16_t*)(a)) = (b) |
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#define AV_WN32(a, b) *((uint32_t*)(a)) = (b) |
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#define AV_WN64(a, b) *((uint64_t*)(a)) = (b) |
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#endif /* !__GNUC__ */ |
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/* endian macros */ |
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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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#ifdef HAVE_FAST_UNALIGNED |
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# ifdef WORDS_BIGENDIAN |
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# define AV_RB16(x) AV_RN16(x) |
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# define AV_WB16(p, d) AV_WN16(p, d) |
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# define AV_RL16(x) bswap_16(AV_RN16(x)) |
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# define AV_WL16(p, d) AV_WN16(p, bswap_16(d)) |
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# else /* WORDS_BIGENDIAN */ |
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# define AV_RB16(x) bswap_16(AV_RN16(x)) |
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# define AV_WB16(p, d) AV_WN16(p, bswap_16(d)) |
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# define AV_RL16(x) AV_RN16(x) |
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# define AV_WL16(p, d) AV_WN16(p, d) |
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# endif |
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#else /* HAVE_FAST_UNALIGNED */ |
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#define AV_RB16(x) ((((const uint8_t*)(x))[0] << 8) | ((const uint8_t*)(x))[1]) |
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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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#define AV_RL16(x) ((((const uint8_t*)(x))[1] << 8) | \ |
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((const uint8_t*)(x))[0]) |
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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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#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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#ifdef HAVE_FAST_UNALIGNED |
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# ifdef WORDS_BIGENDIAN |
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# define AV_RB32(x) AV_RN32(x) |
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# define AV_WB32(p, d) AV_WN32(p, d) |
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# define AV_RL32(x) bswap_32(AV_RN32(x)) |
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# define AV_WL32(p, d) AV_WN32(p, bswap_32(d)) |
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# else /* WORDS_BIGENDIAN */ |
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# define AV_RB32(x) bswap_32(AV_RN32(x)) |
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# define AV_WB32(p, d) AV_WN32(p, bswap_32(d)) |
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# define AV_RL32(x) AV_RN32(x) |
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# define AV_WL32(p, d) AV_WN32(p, d) |
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# endif |
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#else /* HAVE_FAST_UNALIGNED */ |
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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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#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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#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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#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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#ifdef HAVE_FAST_UNALIGNED |
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# ifdef WORDS_BIGENDIAN |
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# define AV_RB64(x) AV_RN64(x) |
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# define AV_WB64(p, d) AV_WN64(p, d) |
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# define AV_RL64(x) bswap_64(AV_RN64(x)) |
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# define AV_WL64(p, d) AV_WN64(p, bswap_64(d)) |
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# else /* WORDS_BIGENDIAN */ |
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# define AV_RB64(x) bswap_64(AV_RN64(x)) |
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# define AV_WB64(p, d) AV_WN64(p, bswap_64(d)) |
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# define AV_RL64(x) AV_RN64(x) |
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# define AV_WL64(p, d) AV_WN64(p, d) |
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# endif |
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#else /* HAVE_FAST_UNALIGNED */ |
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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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#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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#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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#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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#endif /* FFMPEG_INTREADWRITE_H */
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