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avfilter/vf_v360: reduce by one cosf call less

This commit is contained in:
Paul B Mahol 2019-09-14 17:40:46 +02:00
parent 2a672a93d2
commit 451cee662c
1 changed files with 8 additions and 3 deletions
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11
libavfilter/vf_v360.c
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@ -1827,9 +1827,14 @@ static void dfisheye_to_xyz(const V360Context *s,
const float phi = M_PI + atan2f(vf, uf * m);
const float theta = m * 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);
}