From cd753968976deecdf2aac12f610b54f74f322c1e Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Tue, 28 May 2019 10:51:57 +0200
Subject: [PATCH] avfilter/avf_ahistogram: make use of av_rescale

---
 libavfilter/avf_ahistogram.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/avf_ahistogram.c b/libavfilter/avf_ahistogram.c
index 7795f3913c..a0931bfa58 100644
--- a/libavfilter/avf_ahistogram.c
+++ b/libavfilter/avf_ahistogram.c
@@ -120,7 +120,7 @@ static int config_input(AVFilterLink *inlink)
     AVFilterContext *ctx = inlink->dst;
     AudioHistogramContext *s = ctx->priv;
 
-    s->nb_samples = FFMAX(1, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
+    s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
     s->dchannels = s->dmode == SINGLE ? 1 : inlink->channels;
     s->shistogram = av_calloc(s->w, s->dchannels * sizeof(*s->shistogram));
     if (!s->shistogram)