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Diffstat (limited to 'contrib/ffmpeg/libavutil/integer.h')
| -rw-r--r-- | contrib/ffmpeg/libavutil/integer.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavutil/integer.h b/contrib/ffmpeg/libavutil/integer.h index a50ad9bae..2a4d70316 100644 --- a/contrib/ffmpeg/libavutil/integer.h +++ b/contrib/ffmpeg/libavutil/integer.h @@ -37,13 +37,46 @@ typedef struct AVInteger{ AVInteger av_add_i(AVInteger a, AVInteger b); AVInteger av_sub_i(AVInteger a, AVInteger b); + +/** + * returns the rounded down value of the logarithm of base 2 of the given AVInteger. + * this is simply the index of the most significant bit which is 1. Or 0 of all bits are 0 + */ int av_log2_i(AVInteger a); AVInteger av_mul_i(AVInteger a, AVInteger b); + +/** + * returns 0 if a==b, 1 if a>b and -1 if a<b. + */ int av_cmp_i(AVInteger a, AVInteger b); + +/** + * bitwise shift. + * @param s the number of bits by which the value should be shifted right, may be negative for shifting left + */ AVInteger av_shr_i(AVInteger a, int s); + +/** + * returns a % b. + * @param quot a/b will be stored here + */ AVInteger av_mod_i(AVInteger *quot, AVInteger a, AVInteger b); + +/** + * returns a/b. + */ AVInteger av_div_i(AVInteger a, AVInteger b); + +/** + * converts the given int64_t to an AVInteger. + */ AVInteger av_int2i(int64_t a); + +/** + * converts the given AVInteger to an int64_t. + * if the AVInteger is too large to fit into an int64_t, + * then only the least significant 64bit will be used + */ int64_t av_i2int(AVInteger a); #endif // INTEGER_H |