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libavutil: add av_mod_uintp2
Reviewed-by: Michael Niedermayer <michaelni@gmx.at> Signed-off-by: James Almer <jamrial@gmail.com>
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@ -210,6 +210,17 @@ static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
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else return a;
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else return a;
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}
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}
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/**
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* Clear high bits from an unsigned integer starting with specific bit position
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* @param a value to clip
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* @param p bit position to clip at
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* @return clipped value
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*/
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static av_always_inline av_const unsigned av_mod_uintp2_c(unsigned a, unsigned p)
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{
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return a & ((1 << p) - 1);
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}
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/**
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/**
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* Add two signed 32-bit values with saturation.
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* Add two signed 32-bit values with saturation.
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*
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*
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@ -466,6 +477,9 @@ static av_always_inline av_const int av_popcount64_c(uint64_t x)
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#ifndef av_clip_uintp2
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#ifndef av_clip_uintp2
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# define av_clip_uintp2 av_clip_uintp2_c
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# define av_clip_uintp2 av_clip_uintp2_c
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#endif
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#endif
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#ifndef av_mod_uintp2
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# define av_mod_uintp2 av_mod_uintp2_c
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#endif
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#ifndef av_sat_add32
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#ifndef av_sat_add32
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# define av_sat_add32 av_sat_add32_c
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# define av_sat_add32 av_sat_add32_c
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#endif
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#endif
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