From f465badb062c8023bc245f4878e7a6a082afc416 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 31 Jan 2024 02:37:57 +0100 Subject: [PATCH] avutil/rational: Document what is to be expected from av_d2q() of doubles representing rational numbers Signed-off-by: Michael Niedermayer --- libavutil/rational.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavutil/rational.h b/libavutil/rational.h index 8cbfc8e066..849f47f38d 100644 --- a/libavutil/rational.h +++ b/libavutil/rational.h @@ -168,6 +168,10 @@ static av_always_inline AVRational av_inv_q(AVRational q) * In case of infinity, the returned value is expressed as `{1, 0}` or * `{-1, 0}` depending on the sign. * + * In general rational numbers with |num| <= 1<<26 && |den| <= 1<<26 + * can be recovered exactly from their double representation. + * (no exceptions were found within 1B random ones) + * * @param d `double` to convert * @param max Maximum allowed numerator and denominator * @return `d` in AVRational form