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avcodec: move bitswap_32() into a header file

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Allows more codecs than mpeg12video to make use of it.
This commit is contained in:
Steinar H. Gunderson
2017-01-08 14:14:54 +01:00
committed by Paul B Mahol
parent 107b3064d8
commit eaff1aa09e
2 changed files with 8 additions and 8 deletions
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8
libavcodec/bitstream.c
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@ -128,14 +128,6 @@ static int alloc_table(VLC *vlc, int size, int use_static)
return index; return index;
} }
static av_always_inline uint32_t bitswap_32(uint32_t x)
{
return (uint32_t)ff_reverse[ x & 0xFF] << 24 |
(uint32_t)ff_reverse[(x >> 8) & 0xFF] << 16 |
(uint32_t)ff_reverse[(x >> 16) & 0xFF] << 8 |
(uint32_t)ff_reverse[ x >> 24];
}
typedef struct VLCcode { typedef struct VLCcode {
uint8_t bits; uint8_t bits;
uint16_t symbol; uint16_t symbol;

8
libavcodec/mathops.h
View File

@ -249,4 +249,12 @@ static inline int8_t ff_u8_to_s8(uint8_t a)
return b.s8; return b.s8;
} }
static av_always_inline uint32_t bitswap_32(uint32_t x)
{
return (uint32_t)ff_reverse[ x & 0xFF] << 24 |
(uint32_t)ff_reverse[(x >> 8) & 0xFF] << 16 |
(uint32_t)ff_reverse[(x >> 16) & 0xFF] << 8 |
(uint32_t)ff_reverse[ x >> 24];
}
#endif /* AVCODEC_MATHOPS_H */ #endif /* AVCODEC_MATHOPS_H */