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| author | Måns Rullgård <mans@mansr.com> | 2010-02-21 21:48:37 +0000 |
|---|---|---|
| committer | Måns Rullgård <mans@mansr.com> | 2010-02-21 21:48:37 +0000 |
| commit | 48960b8f2496c03600e9d139521a1cf8f4a07e55 (patch) | |
| tree | f71da47410876f4a9c16e1e6c0c7ef1d857907c4 /libavcodec/mathops.h | |
| parent | 94a5218c108d078491aa69db72433f2918bdab5d (diff) | |
| download | ffmpeg-48960b8f2496c03600e9d139521a1cf8f4a07e55.tar.gz | |
Add zero_extend() function
Originally committed as revision 21947 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/mathops.h')
| -rw-r--r-- | libavcodec/mathops.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libavcodec/mathops.h b/libavcodec/mathops.h index 85eac484e0..149910bb1d 100644 --- a/libavcodec/mathops.h +++ b/libavcodec/mathops.h @@ -122,6 +122,13 @@ static inline av_const int sign_extend(int val, unsigned bits) } #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 #define COPY3_IF_LT(x, y, a, b, c, d)\ if ((y) < (x)) {\ |