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Add zero_extend() function

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Originally committed as revision 21947 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-02-21 21:48:37 +00:00
parent 94a5218c10
commit 48960b8f24
1 changed files with 7 additions and 0 deletions
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7
libavcodec/mathops.h
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@ -122,6 +122,13 @@ static inline av_const int sign_extend(int val, unsigned bits)
} }
#endif #endif
#ifndef zero_extend
static inline av_const unsigned zero_extend(unsigned val, unsigned bits)
{
return (val << (INT_BIT - bits)) >> (INT_BIT - bits);
}
#endif
#ifndef COPY3_IF_LT #ifndef COPY3_IF_LT
#define COPY3_IF_LT(x, y, a, b, c, d)\ #define COPY3_IF_LT(x, y, a, b, c, d)\
if ((y) < (x)) {\ if ((y) < (x)) {\