[FFmpeg-cvslog] avfilter/vf_v360: fill unused regions too for orthographic output format

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sun Aug 22 14:00:04 2021 +0200| [da6aab45e42a41b2b5750f7f36cb7da7de26c4ed] | committer: Paul B Mahol

avfilter/vf_v360: fill unused regions too for orthographic output format

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=da6aab45e42a41b2b5750f7f36cb7da7de26c4ed
---

 libavfilter/vf_v360.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/libavfilter/vf_v360.c b/libavfilter/vf_v360.c
index b6e9acf5dc..58915c5487 100644
--- a/libavfilter/vf_v360.c
+++ b/libavfilter/vf_v360.c
@@ -2055,13 +2055,20 @@ static int orthographic_to_xyz(const V360Context *s,
     const float r = hypotf(x, y);
     const float theta = asinf(r);
 
-    vec[0] = x;
-    vec[1] = y;
     vec[2] = cosf(theta);
+    if (vec[2] > 0) {
+        vec[0] = x;
+        vec[1] = y;
 
-    normalize_vector(vec);
+        normalize_vector(vec);
+        return 1;
+    } else {
+        vec[0] = 0;
+        vec[1] = 0;
+        vec[2] = 1;
 
-    return 1;
+        return 0;
+    }
 }
 
 /**