Файл mathematics.h

См. исходные тексты.

Перечисления
enum	AVRounding {   AV_ROUND_ZERO = 0, AV_ROUND_INF = 1, AV_ROUND_DOWN = 2, AV_ROUND_UP = 3,   AV_ROUND_NEAR_INF = 5, AV_ROUND_PASS_MINMAX = 8192 }

Функции
int64_t av_const	av_gcd (int64_t a, int64_t b)
int64_t	av_rescale (int64_t a, int64_t b, int64_t c) av_const
int64_t	av_rescale_rnd (int64_t a, int64_t b, int64_t c, enum AVRounding rnd) av_const
int64_t	av_rescale_q (int64_t a, AVRational bq, AVRational cq) av_const
int64_t	av_rescale_q_rnd (int64_t a, AVRational bq, AVRational cq, enum AVRounding rnd) av_const
int	av_compare_ts (int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
int64_t	av_compare_mod (uint64_t a, uint64_t b, uint64_t mod)
int64_t	av_rescale_delta (AVRational in_tb, int64_t in_ts, AVRational fs_tb, int duration, int64_t *last, AVRational out_tb)
int64_t	av_add_stable (AVRational ts_tb, int64_t ts, AVRational inc_tb, int64_t inc)