From b76f9bcfd0796afb3d23a4c833508a34dd516a78 Mon Sep 17 00:00:00 2001 From: Andreas Rheinhardt Date: Sun, 13 Jun 2021 01:57:27 +0200 Subject: [PATCH] avfilter/internal: Mark ff_filter_get_nb_threads() as av_pure It does not modify anything; it only returns a value, so it fulfills the requirements for av_pure. The deeper rationale behind this change is that this function is called quite often inside arguments to FFMIN which may lead to two calls to it; declaring this function as av_pure allows the compiler to optimize the second call away. Signed-off-by: Andreas Rheinhardt --- libavfilter/internal.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavfilter/internal.h b/libavfilter/internal.h index f3b434dbe9..1bcfb830a1 100644 --- a/libavfilter/internal.h +++ b/libavfilter/internal.h @@ -363,7 +363,7 @@ static inline int ff_norm_qscale(int qscale, int type) * Get number of threads for current filter instance. * This number is always same or less than graph->nb_threads. */ -int ff_filter_get_nb_threads(AVFilterContext *ctx); +int ff_filter_get_nb_threads(AVFilterContext *ctx) av_pure; /** * Generic processing of user supplied commands that are set