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avfilter/vf_v360: add options to h/w unflip input video

tags/n4.3
Paul B Mahol 6 years ago
parent
a06d70350b
commit
5b12a47e08
3 changed files with 73 additions and 27 deletions
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  1. +4
    -0
      doc/filters.texi
  2. +3
    -0
      libavfilter/v360.h
  3. +66
    -27
      libavfilter/vf_v360.c

+ 4
- 0
doc/filters.texi View File

@@ -18084,6 +18084,10 @@ Default value is @b{@samp{ypr}}.
@item d_flip
Flip the output video horizontally/vertically/in-depth. Boolean values.

@item ih_flip
@item iv_flip
Set if input video is flipped horizontally/vertically. Boolean values.

@item in_trans
Set if input video is transposed. Boolean value, by default disabled.



+ 3
- 0
libavfilter/v360.h View File

@@ -98,12 +98,15 @@ typedef struct V360Context {

float yaw, pitch, roll;

int ih_flip, iv_flip;
int h_flip, v_flip, d_flip;
int in_transpose, out_transpose;

float h_fov, v_fov;
float flat_range[3];

float input_mirror_modifier[2];

int planewidth[4], planeheight[4];
int inplanewidth[4], inplaneheight[4];
int nb_planes;


+ 66
- 27
libavfilter/vf_v360.c View File

@@ -96,6 +96,8 @@ static const AVOption v360_options[] = {
{ "h_flip", "flip out video horizontally", OFFSET(h_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "h_flip"},
{ "v_flip", "flip out video vertically", OFFSET(v_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "v_flip"},
{ "d_flip", "flip out video indepth", OFFSET(d_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "d_flip"},
{ "ih_flip", "flip in video horizontally", OFFSET(ih_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "ih_flip"},
{ "iv_flip", "flip in video vertically", OFFSET(iv_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "iv_flip"},
{ "in_trans", "transpose video input", OFFSET(in_transpose), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "in_transpose"},
{ "out_trans", "transpose video output", OFFSET(out_transpose), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "out_transpose"},
{ NULL }
@@ -815,6 +817,9 @@ static void xyz_to_cube(const V360Context *s,

face = s->in_cubemap_face_order[*direction];
rotate_cube_face(uf, vf, s->in_cubemap_face_rotation[face]);

(*uf) *= s->input_mirror_modifier[0];
(*vf) *= s->input_mirror_modifier[1];
}

/**
@@ -1125,7 +1130,6 @@ static void xyz_to_cube3x2(const V360Context *s,
new_vi = av_clip(roundf(0.5f * new_ehi * (vf + 1.f)), 0, new_ehi - 1);
}


us[i + 1][j + 1] = u_shift + new_ui;
vs[i + 1][j + 1] = v_shift + new_vi;
}
@@ -1259,7 +1263,6 @@ static void xyz_to_cube1x6(const V360Context *s,
new_vi = av_clip(roundf(0.5f * new_ehi * (vf + 1.f)), 0, new_ehi - 1);
}


us[i + 1][j + 1] = new_ui;
vs[i + 1][j + 1] = v_shift + new_vi;
}
@@ -1337,7 +1340,6 @@ static void xyz_to_cube6x1(const V360Context *s,
new_vi = av_clip(roundf(0.5f * ehi * (vf + 1.f)), 0, ehi - 1);
}


us[i + 1][j + 1] = u_shift + new_ui;
vs[i + 1][j + 1] = new_vi;
}
@@ -1387,8 +1389,8 @@ static void xyz_to_equirect(const V360Context *s,
const float *vec, int width, int height,
uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv)
{
const float phi = atan2f(vec[0], -vec[2]);
const float theta = asinf(-vec[1]);
const float phi = atan2f(vec[0], -vec[2]) * s->input_mirror_modifier[0];
const float theta = asinf(-vec[1]) * s->input_mirror_modifier[1];
float uf, vf;
int ui, vi;
int i, j;
@@ -1420,19 +1422,51 @@ static int prepare_eac_in(AVFilterContext *ctx)
{
V360Context *s = ctx->priv;

s->in_cubemap_face_order[RIGHT] = TOP_RIGHT;
s->in_cubemap_face_order[LEFT] = TOP_LEFT;
s->in_cubemap_face_order[UP] = BOTTOM_RIGHT;
s->in_cubemap_face_order[DOWN] = BOTTOM_LEFT;
s->in_cubemap_face_order[FRONT] = TOP_MIDDLE;
s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE;
if (s->ih_flip && s->iv_flip) {
s->in_cubemap_face_order[RIGHT] = BOTTOM_LEFT;
s->in_cubemap_face_order[LEFT] = BOTTOM_RIGHT;
s->in_cubemap_face_order[UP] = TOP_LEFT;
s->in_cubemap_face_order[DOWN] = TOP_RIGHT;
s->in_cubemap_face_order[FRONT] = BOTTOM_MIDDLE;
s->in_cubemap_face_order[BACK] = TOP_MIDDLE;
} else if (s->ih_flip) {
s->in_cubemap_face_order[RIGHT] = TOP_LEFT;
s->in_cubemap_face_order[LEFT] = TOP_RIGHT;
s->in_cubemap_face_order[UP] = BOTTOM_LEFT;
s->in_cubemap_face_order[DOWN] = BOTTOM_RIGHT;
s->in_cubemap_face_order[FRONT] = TOP_MIDDLE;
s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE;
} else if (s->iv_flip) {
s->in_cubemap_face_order[RIGHT] = BOTTOM_RIGHT;
s->in_cubemap_face_order[LEFT] = BOTTOM_LEFT;
s->in_cubemap_face_order[UP] = TOP_RIGHT;
s->in_cubemap_face_order[DOWN] = TOP_LEFT;
s->in_cubemap_face_order[FRONT] = BOTTOM_MIDDLE;
s->in_cubemap_face_order[BACK] = TOP_MIDDLE;
} else {
s->in_cubemap_face_order[RIGHT] = TOP_RIGHT;
s->in_cubemap_face_order[LEFT] = TOP_LEFT;
s->in_cubemap_face_order[UP] = BOTTOM_RIGHT;
s->in_cubemap_face_order[DOWN] = BOTTOM_LEFT;
s->in_cubemap_face_order[FRONT] = TOP_MIDDLE;
s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE;
}

s->in_cubemap_face_rotation[TOP_LEFT] = ROT_0;
s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_0;
s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_0;
s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_270;
s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_90;
s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_270;
if (s->iv_flip) {
s->in_cubemap_face_rotation[TOP_LEFT] = ROT_270;
s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_90;
s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_270;
s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_0;
s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_0;
s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_0;
} else {
s->in_cubemap_face_rotation[TOP_LEFT] = ROT_0;
s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_0;
s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_0;
s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_270;
s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_90;
s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_270;
}

return 0;
}
@@ -1694,8 +1728,8 @@ static void xyz_to_dfisheye(const V360Context *s,
const float ew = width / 2.f;
const float eh = height;

const float phi = atan2f(-vec[1], -vec[0]);
const float theta = acosf(fabsf(vec[2])) / M_PI;
const float phi = atan2f(-vec[1], -vec[0]) * s->input_mirror_modifier[0];
const float theta = acosf(fabsf(vec[2])) / M_PI * s->input_mirror_modifier[1];

float uf = (theta * cosf(phi) * scale + 0.5f) * ew;
float vf = (theta * sinf(phi) * scale + 0.5f) * eh;
@@ -1818,8 +1852,8 @@ static void xyz_to_barrel(const V360Context *s,
{
const float scale = 0.99f;

const float phi = atan2f(vec[0], -vec[2]);
const float theta = asinf(-vec[1]);
const float phi = atan2f(vec[0], -vec[2]) * s->input_mirror_modifier[0];
const float theta = asinf(-vec[1]) * s->input_mirror_modifier[1];
const float theta_range = M_PI / 4.f;

int ew, eh;
@@ -1832,7 +1866,7 @@ static void xyz_to_barrel(const V360Context *s,
ew = 4 * width / 5;
eh = height;

u_shift = 0;
u_shift = s->ih_flip ? width / 5 : 0;
v_shift = 0;

uf = (phi / M_PI * scale + 1.f) * ew / 2.f;
@@ -1841,7 +1875,7 @@ static void xyz_to_barrel(const V360Context *s,
ew = width / 5;
eh = height / 2;

u_shift = 4 * ew;
u_shift = s->ih_flip ? 0 : 4 * ew;

if (theta < 0.f) { // UP
uf = vec[0] / vec[1];
@@ -1853,6 +1887,9 @@ static void xyz_to_barrel(const V360Context *s,
v_shift = eh;
}

uf *= s->input_mirror_modifier[0] * s->input_mirror_modifier[1];
vf *= s->input_mirror_modifier[1];

uf = 0.5f * ew * (uf * scale + 1.f);
vf = 0.5f * eh * (vf * scale + 1.f);
}
@@ -1869,7 +1906,6 @@ static void xyz_to_barrel(const V360Context *s,
vs[i + 1][j + 1] = v_shift + av_clip(vi + i, 0, eh - 1);
}
}

}

static void multiply_matrix(float c[3][3], const float a[3][3], const float b[3][3])
@@ -1984,7 +2020,7 @@ static int config_output(AVFilterLink *outlink)
int err;
int p, h, w;
float hf, wf;
float mirror_modifier[3];
float output_mirror_modifier[3];
void (*in_transform)(const V360Context *s,
const float *vec, int width, int height,
uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv);
@@ -1995,6 +2031,9 @@ static int config_output(AVFilterLink *outlink)
uint16_t *u, uint16_t *v, int16_t *ker);
float rot_mat[3][3];

s->input_mirror_modifier[0] = s->ih_flip ? -1.f : 1.f;
s->input_mirror_modifier[1] = s->iv_flip ? -1.f : 1.f;

switch (s->interp) {
case NEAREST:
calculate_kernel = nearest_kernel;
@@ -2212,7 +2251,7 @@ static int config_output(AVFilterLink *outlink)
}

calculate_rotation_matrix(s->yaw, s->pitch, s->roll, rot_mat, s->rotation_order);
set_mirror_modifier(s->h_flip, s->v_flip, s->d_flip, mirror_modifier);
set_mirror_modifier(s->h_flip, s->v_flip, s->d_flip, output_mirror_modifier);

// Calculate remap data
for (p = 0; p < s->nb_allocated; p++) {
@@ -2236,7 +2275,7 @@ static int config_output(AVFilterLink *outlink)
else
out_transform(s, i, j, width, height, vec);
rotate(rot_mat, vec);
mirror(mirror_modifier, vec);
mirror(output_mirror_modifier, vec);
if (s->in_transpose)
in_transform(s, vec, in_height, in_width, r_tmp.v, r_tmp.u, &du, &dv);
else


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