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avfilter/vf_v360: make FOV adjusted for dual fisheye too

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Remove any usage of padding for this format.
This commit is contained in:
Paul B Mahol 2020-04-29 19:16:12 +02:00
parent d8147c4e2d
commit 2970846fc1
2 changed files with 25 additions and 21 deletions
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22
doc/filters.texi
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@ -19043,19 +19043,19 @@ Dual fisheye.
Format specific options:
@table @option
@item in_pad
@item out_pad
Set padding proportion. Values in decimals.
@item h_fov
@item v_fov
@item d_fov
Set output horizontal/vertical/diagonal field of view. Values in degrees.
Example values:
@table @samp
@item 0
No padding.
@item 0.01
1% padding.
@end table
If diagonal field of view is set it overrides horizontal and vertical field of view.
Default value is @b{@samp{0}}.
@item ih_fov
@item iv_fov
@item id_fov
Set input horizontal/vertical/diagonal field of view. Values in degrees.
If diagonal field of view is set it overrides horizontal and vertical field of view.
@end table
@item barrel

24
libavfilter/vf_v360.c
View File

@ -2991,16 +2991,14 @@ static int dfisheye_to_xyz(const V360Context *s,
int i, int j, int width, int height,
float *vec)
{
const float scale = 1.f + s->out_pad;
const float ew = width / 2.f;
const float eh = height;
const int ei = i >= ew ? i - ew : i;
const float m = i >= ew ? 1.f : -1.f;
const float uf = ((2.f * ei) / ew - 1.f) * scale;
const float vf = ((2.f * j + 1.f) / eh - 1.f) * scale;
const float uf = s->flat_range[0] * ((2.f * ei) / ew - 1.f);
const float vf = s->flat_range[1] * ((2.f * j + 1.f) / eh - 1.f);
const float h = hypotf(uf, vf);
const float lh = h > 0.f ? h : 1.f;
@ -3034,8 +3032,6 @@ static int xyz_to_dfisheye(const V360Context *s,
const float *vec, int width, int height,
int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
{
const float scale = 1.f - s->in_pad;
const float ew = width / 2.f;
const float eh = height;
@ -3043,8 +3039,8 @@ static int xyz_to_dfisheye(const V360Context *s,
const float lh = h > 0.f ? h : 1.f;
const float theta = acosf(fabsf(vec[2])) / M_PI;
float uf = (theta * (vec[0] / lh) * s->input_mirror_modifier[0] * scale + 0.5f) * ew;
float vf = (theta * (vec[1] / lh) * s->input_mirror_modifier[1] * scale + 0.5f) * eh;
float uf = (theta * (vec[0] / lh) * s->input_mirror_modifier[0] / s->iflat_range[0] + 0.5f) * ew;
float vf = (theta * (vec[1] / lh) * s->input_mirror_modifier[1] / s->iflat_range[1] + 0.5f) * eh;
int ui, vi;
int u_shift;
@ -3657,6 +3653,14 @@ static void fov_from_dfov(int format, float d_fov, float w, float h, float *h_fo
*v_fov = 2.f * atan2f(h * 0.5f, l) * 360.f / M_PI;
}
break;
case DUAL_FISHEYE:
{
const float d = 0.5f * hypotf(w * 0.5f, h);
*h_fov = d / w * 2.f * d_fov;
*v_fov = d / h * d_fov;
}
break;
case FISHEYE:
{
const float d = 0.5f * hypotf(w, h);
@ -3928,7 +3932,7 @@ static int config_output(AVFilterLink *outlink)
return AVERROR(EINVAL);
case DUAL_FISHEYE:
s->in_transform = xyz_to_dfisheye;
err = 0;
err = prepare_fisheye_in(ctx);
wf = w;
hf = h;
break;
@ -4058,7 +4062,7 @@ static int config_output(AVFilterLink *outlink)
break;
case DUAL_FISHEYE:
s->out_transform = dfisheye_to_xyz;
prepare_out = NULL;
prepare_out = prepare_fisheye_out;
w = lrintf(wf);
h = lrintf(hf);
break;