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avfilter/vf_v360: fix several problems with 'perspective' output

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The image center wasn't preserved, the output image was mirror reversed,
and rotations were made around wrong axes.
I did also remove the vector normalization, because it's sure that the vector
is already normalized if it's calculated from sin() and cos() terms.
This commit is contained in:
Michael Koch 2020-12-04 19:43:26 +01:00 committed by Paul B Mahol
parent dbf8a1639f
commit ce8f45aaba
1 changed files with 2 additions and 3 deletions
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libavfilter/vf_v360.c
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@ -3133,8 +3133,8 @@ static int perspective_to_xyz(const V360Context *s,
const float cos_theta = cosf(theta);
vec[0] = cos_theta * sin_phi;
vec[1] = sin_theta;
vec[2] = cos_theta * cos_phi;
vec[1] = cos_theta * cos_phi;
vec[2] = sin_theta;
} else {
vec[0] = 0.f;
vec[1] = 1.f;
@ -3142,7 +3142,6 @@ static int perspective_to_xyz(const V360Context *s,
return 0;
}
normalize_vector(vec);
return 1;
}