On 3/9/18, Hazem Ashmawy <hazem.s.ashm...@gmail.com> wrote:
> Add filter to convert between various panorama projections. It supports
> Equirectangular and Cubemaps (3x2 and 6x1 cubemap layouts).
>
> commit a8d80408bd9d99542cc29f30d7e6b00771846029
> Author: Hazem Ashmawy <hazem.s.ashm...@gmail.com>
> Date: Thu Mar 8 10:09:36 2018 +0200
>
> avfilter: add convertion to/from cubemap 6x1
>
> Signed-off-by: Hazem Ashmawy <hazem.s.ashm...@gmail.com>
>
> commit f9f6a6cc0ceb1a4e749041658b7a441696b82588
> Author: Paul B Mahol <one...@gmail.com>
> Date: Thu Dec 3 21:15:13 2015 +0100
>
> avfilter: add panorama filter
>
> Signed-off-by: Paul B Mahol <one...@gmail.com>
>
> Signed-off-by: Hazem Ashmawy <hazem.s.ashm...@gmail.com>
> ---
> libavfilter/Makefile | 1 +
> libavfilter/allfilters.c | 1 +
> libavfilter/vf_panorama.c | 553
> ++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 555 insertions(+)
> create mode 100644 libavfilter/vf_panorama.c
>
Here is partial change for converting 3x2 cubemap as given by latest
youtube videos to
equirectangular projection:
| diff --git a/libavfilter/vf_panorama.c b/libavfilter/vf_panorama.c
| index 7d9de5b62c..4d43fc0dd5 100644
| --- a/libavfilter/vf_panorama.c
| +++ b/libavfilter/vf_panorama.c
| @@ -394,9 +394,9 @@ static int config_output(AVFilterLink *outlink)
|
| phi_threshold = atan2(1., 1. / cos(theta_norm));
| if (phi > phi_threshold) {
| - face = DOWN;
| - } else if (phi < -phi_threshold) {
| face = TOP;
| + } else if (phi < -phi_threshold) {
| + face = DOWN;
| } else {
| ;
| }
| @@ -411,14 +411,14 @@ static int config_output(AVFilterLink *outlink)
| case RIGHT:
| locate(z, y, x, M_PI_2, rw, rh, &ox, &oy);
| break;
| - case TOP:
| - locate(y, z, x, M_PI, rw, rh, &ox, &oy);
| + case DOWN:
| + locate(y, z, x, M_PI_2, rw, rh, &ox, &oy);
| break;
| case BACK:
| - locate(x, y, z,-M_PI_2, rw, rh, &ox, &oy);
| + locate(x, y, z, 0, rw, rh, &ox, &oy);
| break;
| - case DOWN:
| - locate(y, x, z,-M_PI_2, rw, rh, &ox, &oy);
| + case TOP:
| + locate(y, x, z, M_PI , rw, rh, &ox, &oy);
| break;
| }
|
Could you incorporate this?
And also update all other conversions so thay match with this one?
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