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avfilter/vf_v360: speedup fisheye output

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This commit is contained in:
Paul B Mahol
2020-03-29 13:07:35 +02:00
parent 460001981f
commit 85025162da
1 changed files with 8 additions and 3 deletions
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11
libavfilter/vf_v360.c
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@@ -2531,9 +2531,14 @@ static int fisheye_to_xyz(const V360Context *s,
const float phi = atan2f(vf, uf);
const float theta = M_PI_2 * (1.f - hypotf(uf, vf));
vec[0] = cosf(theta) * cosf(phi);
vec[1] = cosf(theta) * sinf(phi);
vec[2] = sinf(theta);
const float sin_phi = sinf(phi);
const float cos_phi = cosf(phi);
const float sin_theta = sinf(theta);
const float cos_theta = cosf(theta);
vec[0] = cos_theta * cos_phi;
vec[1] = cos_theta * sin_phi;
vec[2] = sin_theta;
normalize_vector(vec);