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[FFmpeg-devel] vf_v360: fix fov_from_hfov for fisheye projection

Message ID 20210319094512.926746-1-daniel.playfair.cal@gmail.com
State New
Headers show
Series [FFmpeg-devel] vf_v360: fix fov_from_hfov for fisheye projection
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Commit Message

Daniel Playfair Cal March 19, 2021, 9:45 a.m. UTC
This was previously incorrect, so that passing only id_fov or d_fov
resulted in incorrect transformation.

Signed-off-by: Daniel Playfair Cal <daniel.playfair.cal@gmail.com>
---
 libavfilter/vf_v360.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
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Patch

diff --git a/libavfilter/vf_v360.c b/libavfilter/vf_v360.c
index 94473cd5b3..425f04da94 100644
--- a/libavfilter/vf_v360.c
+++ b/libavfilter/vf_v360.c
@@ -4045,10 +4045,10 @@  static void fov_from_dfov(int format, float d_fov, float w, float h, float *h_fo
         break;
     case FISHEYE:
         {
-            const float d = 0.5f * hypotf(w, h);
+            const float d = hypotf(w, h);
 
-            *h_fov = d / w * d_fov;
-            *v_fov = d / h * d_fov;
+            *h_fov = w / d * d_fov;
+            *v_fov = h / d * d_fov;
         }
         break;
     case FLAT: