Make it match Facebook's transform360 (https://github.com/facebook/transform360) Fixes one part of #9725.
Showing the changes to libavfilter (1 of 1 file). Show all
Unified · Split
| @@ -3676,37 +3676,39 @@ static int xyz_to_barrelsplit(const V360Context *s, · 3675 unmodified lines | |||
| 3676 | } else { | 3676 | } else { |
| 3677 | const float scalew = s->fin_pad > 0 ? 1.f - s->fin_pad / (width / 3.f) : 1.f - s->in_pad; | 3677 | const float scalew = s->fin_pad > 0 ? 1.f - s->fin_pad / (width / 3.f) : 1.f - s->in_pad; |
| 3678 | const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (height / 4.f) : 1.f - s->in_pad; | 3678 | const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (height / 4.f) : 1.f - s->in_pad; |
| 3679 | int v_offset = 0; | ||
| 3680 | 3679 | ||
| 3681 | ew = width / 3; | 3680 | ew = width / 3; |
| 3682 | eh = height / 4; | 3681 | eh = height / 4; |
| 3683 | 3682 | ||
| 3684 | u_shift = 2 * ew; | 3683 | u_shift = 2 * ew; |
| 3685 | 3684 | ||
| 3685 | uf = vec[0] / vec[1] * scalew; | ||
| 3686 | vf = vec[2] / vec[1] * scaleh; | ||
| 3687 | |||
| 3686 | if (theta <= 0.f && theta >= -M_PI_2 && | 3688 | if (theta <= 0.f && theta >= -M_PI_2 && |
| 3687 | phi <= M_PI_2 && phi >= -M_PI_2) { | 3689 | phi <= M_PI_2 && phi >= -M_PI_2) { |
| 3688 | uf = -vec[0] / vec[1]; | 3690 | // front top |
| 3689 | vf = -vec[2] / vec[1]; | 3691 | uf *= -1.0f; |
| 3692 | vf = -(vf + 1.f) * scaleh + 1.f; | ||
| 3690 | v_shift = 0; | 3693 | v_shift = 0; |
| 3691 | v_offset = -eh; | ||
| 3692 | } else if (theta >= 0.f && theta <= M_PI_2 && | 3694 | } else if (theta >= 0.f && theta <= M_PI_2 && |
| 3693 | phi <= M_PI_2 && phi >= -M_PI_2) { | 3695 | phi <= M_PI_2 && phi >= -M_PI_2) { |
| 3694 | uf = vec[0] / vec[1]; | 3696 | // front bottom |
| 3695 | vf = -vec[2] / vec[1]; | 3697 | vf = -(vf - 1.f) * scaleh; |
| 3696 | v_shift = height * 0.25f; | 3698 | v_shift = height * 0.25f; |
| 3697 | } else if (theta <= 0.f && theta >= -M_PI_2) { | 3699 | } else if (theta <= 0.f && theta >= -M_PI_2) { |
| 3698 | uf = vec[0] / vec[1]; | 3700 | // back top |
| 3699 | vf = vec[2] / vec[1]; | 3701 | vf = (vf - 1.f) * scaleh + 1.f; |
| 3700 | v_shift = height * 0.5f; | 3702 | v_shift = height * 0.5f; |
| 3701 | v_offset = -eh; | ||
| 3702 | } else { | 3703 | } else { |
| 3703 | uf = -vec[0] / vec[1]; | 3704 | // back bottom |
| 3704 | vf = vec[2] / vec[1]; | 3705 | uf *= -1.0f; |
| 3706 | vf = (vf + 1.f) * scaleh; | ||
| 3705 | v_shift = height * 0.75f; | 3707 | v_shift = height * 0.75f; |
| 3706 | } | 3708 | } |
| 3707 | 3709 | ||
| 3708 | uf = 0.5f * width / 3.f * (uf * scalew + 1.f); | 3710 | uf = 0.5f * width / 3.f * (uf + 1.f); |
| 3709 | vf = height * 0.25f * (vf * scaleh + 1.f) + v_offset; | 3711 | vf *= height * 0.25f; |
| 3710 | } | 3712 | } |
| 3711 | 3713 | ||
| 3712 | ui = floorf(uf); | 3714 | ui = floorf(uf); |
| @@ -3764,29 +3766,22 @@ static int barrelsplit_to_xyz(const V360Context *s, · 51 unmodified lines | |||
| 3764 | const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (width / 3.f) : 1.f - s->out_pad; | 3766 | const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (width / 3.f) : 1.f - s->out_pad; |
| 3765 | const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 4.f) : 1.f - s->out_pad; | 3767 | const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 4.f) : 1.f - s->out_pad; |
| 3766 | 3768 | ||
| 3767 | const int face = floorf(y * 4.f); | 3769 | const float facef = floorf(y * 4.f); |
| 3770 | const int face = facef; | ||
| 3768 | const float dir_vert = (face == 1 || face == 3) ? 1.0f : -1.0f; | 3771 | const float dir_vert = (face == 1 || face == 3) ? 1.0f : -1.0f; |
| 3769 | float uf, vf; | 3772 | float uf, vf; |
| 3770 | 3773 | ||
| 3771 | uf = x * 3.f - 2.f; | 3774 | uf = x * 3.f - 2.f; |
| 3772 | 3775 | ||
| 3773 | switch (face) { | 3776 | switch (face) { |
| 3774 | case 0: | 3777 | case 0: // front top |
| 3775 | vf = y * 2.f; | 3778 | case 1: // front bottom |
| 3776 | uf = 1.f - uf; | 3779 | uf = 1.f - uf; |
| 3777 | vf = 0.5f - vf; | 3780 | vf = (0.5f - 2.f * y) / scaleh + facef; |
| 3778 | break; | ||
| 3779 | case 1: | ||
| 3780 | vf = y * 2.f; | ||
| 3781 | uf = 1.f - uf; | ||
| 3782 | vf = 1.f - (vf - 0.5f); | ||
| 3783 | break; | ||
| 3784 | case 2: | ||
| 3785 | vf = y * 2.f - 0.5f; | ||
| 3786 | vf = 1.f - (1.f - vf); | ||
| 3787 | break; | 3781 | break; |
| 3788 | case 3: | 3782 | case 2: // back top |
| 3789 | vf = y * 2.f - 1.5f; | 3783 | case 3: // back bottom |
| 3784 | vf = (y * 2.f - 1.5f) / scaleh + 3.f - facef; | ||
| 3790 | break; | 3785 | break; |
| 3791 | } | 3786 | } |
| 3792 | l_x = (0.5f - uf) / scalew; | 3787 | l_x = (0.5f - uf) / scalew; |