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avfilter/vf_v360: simplify dfisheye_to_xyz() calculations

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This commit is contained in:
Paul B Mahol 2019-09-21 21:17:37 +02:00
parent a46ee096d1
commit b342678bc4
1 changed files with 5 additions and 6 deletions
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11
libavfilter/vf_v360.c
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@ -2048,16 +2048,15 @@ static void dfisheye_to_xyz(const V360Context *s,
const float uf = ((2.f * ei) / ew - 1.f) * scale;
const float vf = ((2.f * j) / eh - 1.f) * scale;
const float phi = M_PI + atan2f(vf, uf * m);
const float theta = m * M_PI_2 * (1.f - hypotf(uf, vf));
const float h = hypotf(uf, vf);
const float lh = h > 0.f ? h : 1.f;
const float theta = m * M_PI_2 * (1.f - h);
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[0] = cos_theta * uf / lh;
vec[1] = cos_theta * -vf / lh;
vec[2] = sin_theta;
normalize_vector(vec);