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libavutil: add av_mod_uintp2 

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2017-02-22 12:53:34 -05:00 committed by Vittorio Giovara
parent 7bfda7d157
commit 19d57ca62e
1 changed files with 14 additions and 0 deletions
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14
libavutil/common.h
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@ -182,6 +182,17 @@ static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
else return a;
}
/**
* Clear high bits from an unsigned integer starting with specific bit position
* @param a value to clip
* @param p bit position to clip at
* @return clipped value
*/
static av_always_inline av_const unsigned av_mod_uintp2_c(unsigned a, unsigned p)
{
return a & ((1 << p) - 1);
}
/**
* Add two signed 32-bit values with saturation.
*
@ -410,6 +421,9 @@ static av_always_inline av_const int av_popcount64_c(uint64_t x)
#ifndef av_clip_uintp2
# define av_clip_uintp2 av_clip_uintp2_c
#endif
#ifndef av_mod_uintp2
# define av_mod_uintp2 av_mod_uintp2_c
#endif
#ifndef av_sat_add32
# define av_sat_add32 av_sat_add32_c
#endif