From f78abca0c2851c743cbe077be9c905ebbc0ce1e8 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Sat, 14 Sep 2019 13:33:24 +0200 Subject: [PATCH] avfilter/vf_v360: call tanf() once --- libavfilter/vf_v360.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/libavfilter/vf_v360.c b/libavfilter/vf_v360.c index 98cef5902e..923ccd6339 100644 --- a/libavfilter/vf_v360.c +++ b/libavfilter/vf_v360.c @@ -2142,11 +2142,11 @@ static int allocate_plane(V360Context *s, int sizeof_uv, int sizeof_ker, int p) static void fov_from_dfov(V360Context *s, float w, float h) { - const float d_angle = 0.5 * FFMIN(s->d_fov, 359.f) * M_PI / 180.f; + const float da = tanf(0.5 * FFMIN(s->d_fov, 359.f) * M_PI / 180.f); const float d = hypotf(w, h); - s->h_fov = atan2f(tanf(d_angle) * w, d) * 360.f / M_PI; - s->v_fov = atan2f(tanf(d_angle) * h, d) * 360.f / M_PI; + s->h_fov = atan2f(da * w, d) * 360.f / M_PI; + s->v_fov = atan2f(da * h, d) * 360.f / M_PI; if (s->h_fov < 0.f) s->h_fov += 360.f;