From 0b150e4f614aa5eda415ade9b2c80a0707c647dc Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sun, 19 Sep 2021 13:47:59 +0200
Subject: [PATCH] avfilter/avf_avectorscope: fix zoom 0 mode with nonlinear
 scale

---
 libavfilter/avf_avectorscope.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/libavfilter/avf_avectorscope.c b/libavfilter/avf_avectorscope.c
index e1d43b4766..e927b241ff 100644
--- a/libavfilter/avf_avectorscope.c
+++ b/libavfilter/avf_avectorscope.c
@@ -303,6 +303,18 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
             av_assert2(0);
         }
 
+        switch (s->scale) {
+        case SQRT:
+            max = sqrtf(max);
+            break;
+        case CBRT:
+            max = cbrtf(max);
+            break;
+        case LOG:
+            max = logf(1 + max) / logf(2);
+            break;
+        }
+
         zoom = 1. / max;
     }