diff options
| author | Paul B Mahol <onemda@gmail.com> | 2019-09-11 16:00:12 +0300 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2019-09-11 16:12:56 +0300 |
| commit | cb41c2af92f26338bc4b732e4891d3bff0f0b169 (patch) | |
| tree | 4ea02168635320d09b88873a9ff739acf6a4203e /libavfilter/vf_v360.c | |
| parent | 944d76a3e056c26bfa2b6459ec1888f0676a37f2 (diff) | |
avfilter/vf_v360: really fix FoV selection
Big thanks to Michael Koch for providing actual formula.
Diffstat (limited to 'libavfilter/vf_v360.c')
| -rw-r--r-- | libavfilter/vf_v360.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libavfilter/vf_v360.c b/libavfilter/vf_v360.c index 794f6212a3..3edea5510f 100644 --- a/libavfilter/vf_v360.c +++ b/libavfilter/vf_v360.c @@ -1410,8 +1410,11 @@ static void stereographic_to_xyz(const V360Context *s, int i, int j, int width, int height, float *vec) { - const float x = ((2.f * i) / width - 1.f) * (s->h_fov / 180.f); - const float y = ((2.f * j) / height - 1.f) * (s->v_fov / 180.f); + const float h_angle = tan(FFMIN(s->h_fov, 359.f) * M_PI / 720.f); + const float v_angle = tan(FFMIN(s->v_fov, 359.f) * M_PI / 720.f); + + const float x = ((2.f * i) / width - 1.f) * h_angle; + const float y = ((2.f * j) / height - 1.f) * v_angle; const float xy = x * x + y * y; vec[0] = 2.f * x / (1.f + xy); |