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lavc: add ff_u8_to_s8() for safe type punning of uint8_t to int8_t

This commit is contained in:
Justin Ruggles 2013-09-16 10:11:32 -04:00
parent 5626f994f2
commit 9ae53c5860
1 changed files with 10 additions and 0 deletions
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10
libavcodec/mathops.h
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@ -224,4 +224,14 @@ static inline av_const unsigned int ff_sqrt(unsigned int a)
return b - (a < b * b);
}
static inline int8_t ff_u8_to_s8(uint8_t a)
{
union {
uint8_t u8;
int8_t s8;
} b;
b.u8 = a;
return b.s8;
}
#endif /* AVCODEC_MATHOPS_H */