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Add sign_extend() function to mathops.h

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Originally committed as revision 17738 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-03-03 00:03:55 +00:00
parent edd532db64
commit 101dfa7d0a
1 changed files with 7 additions and 0 deletions
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libavcodec/mathops.h
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@ -113,5 +113,12 @@ static inline av_const int mid_pred(int a, int b, int c)
} }
#endif #endif
#ifndef sign_extend
static inline av_const int sign_extend(int val, unsigned bits)
{
return (val << (INT_BIT - bits)) >> (INT_BIT - bits);
}
#endif
#endif /* AVCODEC_MATHOPS_H */ #endif /* AVCODEC_MATHOPS_H */