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ffmpeg / libavutil / intreadwrite.h @ a3550abd

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#ifndef INTREADWRITE_H
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#define INTREADWRITE_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 LD16(a) (((const struct unaligned_16 *) (a))->l)
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#define LD32(a) (((const struct unaligned_32 *) (a))->l)
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#define LD64(a) (((const struct unaligned_64 *) (a))->l)
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#define ST16(a, b) (((struct unaligned_16 *) (a))->l) = (b)
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#define ST32(a, b) (((struct unaligned_32 *) (a))->l) = (b)
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#else /* __GNUC__ */
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#define LD16(a) (*((uint16_t*)(a)))
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#define LD32(a) (*((uint32_t*)(a)))
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#define LD64(a) (*((uint64_t*)(a)))
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#define ST16(a, b) *((uint16_t*)(a)) = (b)
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#define ST32(a, b) *((uint32_t*)(a)) = (b)
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#endif /* !__GNUC__ */
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/* endian macros */
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#define AV_RB8(x)  (((uint8_t*)(x))[0])
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#define AV_WB8(p, i, d)  { ((uint8_t*)(p))[(i)] = (d); }
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#define AV_RB16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
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#define AV_WB16(p, i, d) { \
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                    ((uint8_t*)(p))[(i)+1] = (d); \
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                    ((uint8_t*)(p))[(i)] = (d)>>8; }
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#define AV_RB32(x) ((((uint8_t*)(x))[0] << 24) | \
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                   (((uint8_t*)(x))[1] << 16) | \
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                   (((uint8_t*)(x))[2] << 8) | \
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                    ((uint8_t*)(x))[3])
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#define AV_WB32(p, i, d) { \
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                    ((uint8_t*)(p))[(i)+3] = (d); \
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                    ((uint8_t*)(p))[(i)+2] = (d)>>8; \
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                    ((uint8_t*)(p))[(i)+1] = (d)>>16; \
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                    ((uint8_t*)(p))[(i)] = (d)>>24; }
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#define AV_RL8(x)  AV_RB8(x)
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#define AV_WL8(p, i, d)  AV_WB8(p, i, d)
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#define AV_RL16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
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#define AV_WL16(p, i, d) { \
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                    ((uint8_t*)(p))[(i)] = (d); \
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                    ((uint8_t*)(p))[(i)+1] = (d)>>8; }
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#define AV_RL32(x) ((((uint8_t*)(x))[3] << 24) | \
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                   (((uint8_t*)(x))[2] << 16) | \
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                   (((uint8_t*)(x))[1] << 8) | \
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                    ((uint8_t*)(x))[0])
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#define AV_WL32(p, i, d) { \
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                    ((uint8_t*)(p))[(i)] = (d); \
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                    ((uint8_t*)(p))[(i)+1] = (d)>>8; \
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                    ((uint8_t*)(p))[(i)+2] = (d)>>16; \
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                    ((uint8_t*)(p))[(i)+3] = (d)>>24; }
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#endif /* INTREADWRITE_H */