From 7f6d20931b1b14031f585610a8d81a86368ab46d Mon Sep 17 00:00:00 2001
From: Daniel Playfair Cal <daniel.playfair.cal@gmail.com>
Date: Sat, 17 Jul 2021 11:28:56 +0200
Subject: [PATCH] avfilter/vf_v360: fix visibility test for fisheye projection

Previously the visibility test referred to a circle in the input. This
changes it so that it refers accurately to the entire area in the input.
---
 libavfilter/vf_v360.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vf_v360.c b/libavfilter/vf_v360.c
index 0c47883d4d..c5c4e3bf65 100644
--- a/libavfilter/vf_v360.c
+++ b/libavfilter/vf_v360.c
@@ -2926,7 +2926,7 @@ static int xyz_to_fisheye(const V360Context *s,
     float uf = vec[0] / lh * phi / s->iflat_range[0];
     float vf = vec[1] / lh * phi / s->iflat_range[1];
 
-    const int visible = hypotf(uf, vf) <= 0.5f;
+    const int visible = -0.5f < uf && uf < 0.5f && -0.5f < vf && vf < 0.5f;
     int ui, vi;
 
     uf = (uf + 0.5f) * width;