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Diffstat (limited to 'libavutil/rational.h')
| -rw-r--r-- | libavutil/rational.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libavutil/rational.h b/libavutil/rational.h index 0ec18ec969..5d7dab7fd0 100644 --- a/libavutil/rational.h +++ b/libavutil/rational.h @@ -115,6 +115,17 @@ AVRational av_add_q(AVRational b, AVRational c) av_const; AVRational av_sub_q(AVRational b, AVRational c) av_const; /** + * Invert a rational. + * @param q value + * @return 1 / q + */ +static av_always_inline AVRational av_inv_q(AVRational q) +{ + AVRational r = { q.den, q.num }; + return r; +} + +/** * Convert a double precision floating point number to a rational. * inf is expressed as {1,0} or {-1,0} depending on the sign. * |