diff options
| -rw-r--r-- | libavutil/common.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/libavutil/common.h b/libavutil/common.h index 7e93a1ab47..c99d858472 100644 --- a/libavutil/common.h +++ b/libavutil/common.h @@ -218,6 +218,16 @@ static av_always_inline av_const int av_popcount_c(uint32_t x) return (x + (x >> 16)) & 0x3F; } +/** + * Count number of bits set to one in x + * @param x value to count bits of + * @return the number of bits set to one in x + */ +static av_always_inline av_const int av_popcount64_c(uint64_t x) +{ + return av_popcount(x) + av_popcount(x >> 32); +} + #define MKTAG(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24)) #define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24)) @@ -383,3 +393,6 @@ static av_always_inline av_const int av_popcount_c(uint32_t x) #ifndef av_popcount # define av_popcount av_popcount_c #endif +#ifndef av_popcount64 +# define av_popcount64 av_popcount64_c +#endif |