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lavfi/vf_v360: factorize vector computation for barrelsplit

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This commit is contained in:
Anton Khirnov
2022-05-18 11:39:02 +02:00
parent 58bb83c7ed
commit 82784ddf33
1 changed files with 4 additions and 16 deletions
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20
libavfilter/vf_v360.c
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@@ -3765,6 +3765,7 @@ static int barrelsplit_to_xyz(const V360Context *s,
const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 4.f) : 1.f - s->out_pad; const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 4.f) : 1.f - s->out_pad;
const int face = floorf(y * 4.f); const int face = floorf(y * 4.f);
const float dir_vert = (face == 1 || face == 3) ? 1.0f : -1.0f;
float uf, vf; float uf, vf;
uf = x * 3.f - 2.f; uf = x * 3.f - 2.f;
@@ -3774,36 +3775,23 @@ static int barrelsplit_to_xyz(const V360Context *s,
vf = y * 2.f; vf = y * 2.f;
uf = 1.f - uf; uf = 1.f - uf;
vf = 0.5f - vf; vf = 0.5f - vf;
l_x = (0.5f - uf) / scalew;
l_y = -0.5f;
l_z = (0.5f - vf) / scaleh;
break; break;
case 1: case 1:
vf = y * 2.f; vf = y * 2.f;
uf = 1.f - uf; uf = 1.f - uf;
vf = 1.f - (vf - 0.5f); vf = 1.f - (vf - 0.5f);
l_x = (0.5f - uf) / scalew;
l_y = 0.5f;
l_z = (-0.5f + vf) / scaleh;
break; break;
case 2: case 2:
vf = y * 2.f - 0.5f; vf = y * 2.f - 0.5f;
vf = 1.f - (1.f - vf); vf = 1.f - (1.f - vf);
l_x = (0.5f - uf) / scalew;
l_y = -0.5f;
l_z = (0.5f - vf) / scaleh;
break; break;
case 3: case 3:
vf = y * 2.f - 1.5f; vf = y * 2.f - 1.5f;
l_x = (0.5f - uf) / scalew;
l_y = 0.5f;
l_z = (-0.5f + vf) / scaleh;
break; break;
} }
l_x = (0.5f - uf) / scalew;
l_y = 0.5f * dir_vert;
l_z = (vf - 0.5f) * dir_vert / scaleh;
} }
vec[0] = l_x; vec[0] = l_x;