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avfilter/vf_v360: rewrite fov_from_dfov()

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This commit is contained in:
Paul B Mahol 2020-01-20 13:45:07 +01:00
parent e16cd7b86c
commit 091695f8e8
1 changed files with 9 additions and 9 deletions
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18
libavfilter/vf_v360.c
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@ -2716,18 +2716,18 @@ static int allocate_plane(V360Context *s, int sizeof_uv, int sizeof_ker, int p)
return 0;
}
static void fov_from_dfov(V360Context *s, float w, float h)
static void fov_from_dfov(float d_fov, float w, float h, float *h_fov, float *v_fov)
{
const float da = tanf(0.5 * FFMIN(s->d_fov, 359.f) * M_PI / 180.f);
const float da = tanf(0.5 * FFMIN(d_fov, 359.f) * M_PI / 180.f);
const float d = hypotf(w, h);
s->h_fov = atan2f(da * w, d) * 360.f / M_PI;
s->v_fov = atan2f(da * h, d) * 360.f / M_PI;
*h_fov = atan2f(da * w, d) * 360.f / M_PI;
*v_fov = atan2f(da * h, d) * 360.f / M_PI;
if (s->h_fov < 0.f)
s->h_fov += 360.f;
if (s->v_fov < 0.f)
s->v_fov += 360.f;
if (*h_fov < 0.f)
*h_fov += 360.f;
if (*v_fov < 0.f)
*v_fov += 360.f;
}
static void set_dimensions(int *outw, int *outh, int w, int h, const AVPixFmtDescriptor *desc)
@ -3115,7 +3115,7 @@ static int config_output(AVFilterLink *outlink)
}
if (s->d_fov > 0.f)
fov_from_dfov(s, w, h);
fov_from_dfov(s->d_fov, w, h, &s->h_fov, &s->v_fov);
if (prepare_out) {
err = prepare_out(ctx);