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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 INTREADWRITE_H
- #define INTREADWRITE_H
-
- #include <stdint.h>
-
- #ifdef __GNUC__
-
- struct unaligned_64 { uint64_t l; } __attribute__((packed));
- struct unaligned_32 { uint32_t l; } __attribute__((packed));
- struct unaligned_16 { uint16_t l; } __attribute__((packed));
-
- #define LD16(a) (((const struct unaligned_16 *) (a))->l)
- #define LD32(a) (((const struct unaligned_32 *) (a))->l)
- #define LD64(a) (((const struct unaligned_64 *) (a))->l)
-
- #define ST16(a, b) (((struct unaligned_16 *) (a))->l) = (b)
- #define ST32(a, b) (((struct unaligned_32 *) (a))->l) = (b)
- #define ST64(a, b) (((struct unaligned_64 *) (a))->l) = (b)
-
- #else /* __GNUC__ */
-
- #define LD16(a) (*((uint16_t*)(a)))
- #define LD32(a) (*((uint32_t*)(a)))
- #define LD64(a) (*((uint64_t*)(a)))
-
- #define ST16(a, b) *((uint16_t*)(a)) = (b)
- #define ST32(a, b) *((uint32_t*)(a)) = (b)
- #define ST64(a, b) *((uint64_t*)(a)) = (b)
-
- #endif /* !__GNUC__ */
-
- /* endian macros */
- #define AV_RB8(x) (((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)
-
- #ifdef HAVE_FAST_UNALIGNED
- # ifdef WORDS_BIGENDIAN
- # define AV_RB16(x) LD16(x)
- # define AV_WB16(p, d) ST16(p, d)
-
- # define AV_RL16(x) bswap_16(LD16(x))
- # define AV_WL16(p, d) ST16(p, bswap_16(d))
- # else /* WORDS_BIGENDIAN */
- # define AV_RB16(x) bswap_16(LD16(x))
- # define AV_WB16(p, d) ST16(p, bswap_16(d))
-
- # define AV_RL16(x) LD16(x)
- # define AV_WL16(p, d) ST16(p, d)
- # endif
- #else /* HAVE_FAST_UNALIGNED */
- #define AV_RB16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
- #define AV_WB16(p, d) do { \
- ((uint8_t*)(p))[1] = (d); \
- ((uint8_t*)(p))[0] = (d)>>8; } while(0)
-
- #define AV_RL16(x) ((((uint8_t*)(x))[1] << 8) | \
- ((uint8_t*)(x))[0])
- #define AV_WL16(p, d) do { \
- ((uint8_t*)(p))[0] = (d); \
- ((uint8_t*)(p))[1] = (d)>>8; } while(0)
- #endif
-
- #define AV_RB24(x) ((((uint8_t*)(x))[0] << 16) | \
- (((uint8_t*)(x))[1] << 8) | \
- ((uint8_t*)(x))[2])
- #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)
-
- #define AV_RL24(x) ((((uint8_t*)(x))[2] << 16) | \
- (((uint8_t*)(x))[1] << 8) | \
- ((uint8_t*)(x))[0])
- #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)
-
- #ifdef HAVE_FAST_UNALIGNED
- # ifdef WORDS_BIGENDIAN
- # define AV_RB32(x) LD32(x)
- # define AV_WB32(p, d) ST32(p, d)
-
- # define AV_RL32(x) bswap_32(LD32(x))
- # define AV_WL32(p, d) ST32(p, bswap_32(d))
- # else /* WORDS_BIGENDIAN */
- # define AV_RB32(x) bswap_32(LD32(x))
- # define AV_WB32(p, d) ST32(p, bswap_32(d))
-
- # define AV_RL32(x) LD32(x)
- # define AV_WL32(p, d) ST32(p, d)
- # endif
- #else /* HAVE_FAST_UNALIGNED */
- #define AV_RB32(x) ((((uint8_t*)(x))[0] << 24) | \
- (((uint8_t*)(x))[1] << 16) | \
- (((uint8_t*)(x))[2] << 8) | \
- ((uint8_t*)(x))[3])
- #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)
-
- #define AV_RL32(x) ((((uint8_t*)(x))[3] << 24) | \
- (((uint8_t*)(x))[2] << 16) | \
- (((uint8_t*)(x))[1] << 8) | \
- ((uint8_t*)(x))[0])
- #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
-
- #ifdef HAVE_FAST_UNALIGNED
- # ifdef WORDS_BIGENDIAN
- # define AV_RB64(x) LD64(x)
- # define AV_WB64(p, d) ST64(p, d)
-
- # define AV_RL64(x) bswap_64(LD64(x))
- # define AV_WL64(p, d) ST64(p, bswap_64(d))
- # else /* WORDS_BIGENDIAN */
- # define AV_RB64(x) bswap_64(LD64(x))
- # define AV_WB64(p, d) ST64(p, bswap_64(d))
-
- # define AV_RL64(x) LD64(x)
- # define AV_WL64(p, d) ST64(p, d)
- # endif
- #else /* HAVE_FAST_UNALIGNED */
- #define AV_RB64(x) (((uint64_t)((uint8_t*)(x))[0] << 56) | \
- ((uint64_t)((uint8_t*)(x))[1] << 48) | \
- ((uint64_t)((uint8_t*)(x))[2] << 40) | \
- ((uint64_t)((uint8_t*)(x))[3] << 32) | \
- ((uint64_t)((uint8_t*)(x))[4] << 24) | \
- ((uint64_t)((uint8_t*)(x))[5] << 16) | \
- ((uint64_t)((uint8_t*)(x))[6] << 8) | \
- (uint64_t)((uint8_t*)(x))[7])
- #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)
-
- #define AV_RL64(x) (((uint64_t)((uint8_t*)(x))[7] << 56) | \
- ((uint64_t)((uint8_t*)(x))[6] << 48) | \
- ((uint64_t)((uint8_t*)(x))[5] << 40) | \
- ((uint64_t)((uint8_t*)(x))[4] << 32) | \
- ((uint64_t)((uint8_t*)(x))[3] << 24) | \
- ((uint64_t)((uint8_t*)(x))[2] << 16) | \
- ((uint64_t)((uint8_t*)(x))[1] << 8) | \
- (uint64_t)((uint8_t*)(x))[0])
- #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
-
- #endif /* INTREADWRITE_H */
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