FFmpeg
Data Structures | Macros | Functions | Variables
vf_v360.c File Reference

360 video conversion filter. More...

#include <math.h>
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "v360.h"

Go to the source code of this file.

Data Structures

struct  ThreadData
 Used for passing data between threads. More...
 

Macros

#define OFFSET(x)   offsetof(V360Context, x)
 
#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 
#define DEFINE_REMAP1_LINE(bits, div)
 
#define DEFINE_REMAP(ws, bits)
 Generate remapping function with a given window size and pixel depth. More...
 
#define DEFINE_REMAP_LINE(ws, bits, div)
 

Functions

 AVFILTER_DEFINE_CLASS (v360)
 
static int query_formats (AVFilterContext *ctx)
 
void ff_v360_init (V360Context *s, int depth)
 
static void nearest_kernel (float du, float dv, const XYRemap *rmap, int16_t *u, int16_t *v, int16_t *ker)
 Save nearest pixel coordinates for remapping. More...
 
static void bilinear_kernel (float du, float dv, const XYRemap *rmap, int16_t *u, int16_t *v, int16_t *ker)
 Calculate kernel for bilinear interpolation. More...
 
static void calculate_bicubic_coeffs (float t, float *coeffs)
 Calculate 1-dimensional cubic coefficients. More...
 
static void bicubic_kernel (float du, float dv, const XYRemap *rmap, int16_t *u, int16_t *v, int16_t *ker)
 Calculate kernel for bicubic interpolation. More...
 
static void calculate_lanczos_coeffs (float t, float *coeffs)
 Calculate 1-dimensional lanczos coefficients. More...
 
static void lanczos_kernel (float du, float dv, const XYRemap *rmap, int16_t *u, int16_t *v, int16_t *ker)
 Calculate kernel for lanczos interpolation. More...
 
static void calculate_spline16_coeffs (float t, float *coeffs)
 Calculate 1-dimensional spline16 coefficients. More...
 
static void spline16_kernel (float du, float dv, const XYRemap *rmap, int16_t *u, int16_t *v, int16_t *ker)
 Calculate kernel for spline16 interpolation. More...
 
static void calculate_gaussian_coeffs (float t, float *coeffs)
 Calculate 1-dimensional gaussian coefficients. More...
 
static void gaussian_kernel (float du, float dv, const XYRemap *rmap, int16_t *u, int16_t *v, int16_t *ker)
 Calculate kernel for gaussian interpolation. More...
 
static int mod (int a, int b)
 Modulo operation with only positive remainders. More...
 
static int get_direction (char c)
 Convert char to corresponding direction. More...
 
static int get_rotation (char c)
 Convert char to corresponding rotation angle. More...
 
static int get_rorder (char c)
 Convert char to corresponding rotation order. More...
 
static int prepare_cube_in (AVFilterContext *ctx)
 Prepare data for processing cubemap input format. More...
 
static int prepare_cube_out (AVFilterContext *ctx)
 Prepare data for processing cubemap output format. More...
 
static void rotate_cube_face (float *uf, float *vf, int rotation)
 
static void rotate_cube_face_inverse (float *uf, float *vf, int rotation)
 
static void normalize_vector (float *vec)
 Normalize vector. More...
 
static void cube_to_xyz (const V360Context *s, float uf, float vf, int face, float *vec, float scalew, float scaleh)
 Calculate 3D coordinates on sphere for corresponding cubemap position. More...
 
static void xyz_to_cube (const V360Context *s, const float *vec, float *uf, float *vf, int *direction)
 Calculate cubemap position for corresponding 3D coordinates on sphere. More...
 
static void process_cube_coordinates (const V360Context *s, float uf, float vf, int direction, float *new_uf, float *new_vf, int *face)
 Find position on another cube face in case of overflow/underflow. More...
 
static void cube3x2_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in cubemap3x2 format. More...
 
static void xyz_to_cube3x2 (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in cubemap3x2 format for corresponding 3D coordinates on sphere. More...
 
static void cube1x6_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in cubemap1x6 format. More...
 
static void cube6x1_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in cubemap6x1 format. More...
 
static void xyz_to_cube1x6 (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in cubemap1x6 format for corresponding 3D coordinates on sphere. More...
 
static void xyz_to_cube6x1 (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in cubemap6x1 format for corresponding 3D coordinates on sphere. More...
 
static void equirect_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in equirectangular format. More...
 
static int prepare_stereographic_out (AVFilterContext *ctx)
 Prepare data for processing stereographic output format. More...
 
static void stereographic_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in stereographic format. More...
 
static int prepare_stereographic_in (AVFilterContext *ctx)
 Prepare data for processing stereographic input format. More...
 
static void xyz_to_stereographic (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in stereographic format for corresponding 3D coordinates on sphere. More...
 
static void xyz_to_equirect (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in equirectangular format for corresponding 3D coordinates on sphere. More...
 
static int prepare_flat_in (AVFilterContext *ctx)
 Prepare data for processing flat input format. More...
 
static void xyz_to_flat (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in flat format for corresponding 3D coordinates on sphere. More...
 
static void xyz_to_mercator (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in mercator format for corresponding 3D coordinates on sphere. More...
 
static void mercator_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in mercator format. More...
 
static void xyz_to_ball (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in ball format for corresponding 3D coordinates on sphere. More...
 
static void ball_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in ball format. More...
 
static void hammer_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in hammer format. More...
 
static void xyz_to_hammer (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in hammer format for corresponding 3D coordinates on sphere. More...
 
static void sinusoidal_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in sinusoidal format. More...
 
static void xyz_to_sinusoidal (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in sinusoidal format for corresponding 3D coordinates on sphere. More...
 
static int prepare_eac_in (AVFilterContext *ctx)
 Prepare data for processing equi-angular cubemap input format. More...
 
static int prepare_eac_out (AVFilterContext *ctx)
 Prepare data for processing equi-angular cubemap output format. More...
 
static void eac_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in equi-angular cubemap format. More...
 
static void xyz_to_eac (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in equi-angular cubemap format for corresponding 3D coordinates on sphere. More...
 
static int prepare_flat_out (AVFilterContext *ctx)
 Prepare data for processing flat output format. More...
 
static void flat_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in flat format. More...
 
static int prepare_fisheye_out (AVFilterContext *ctx)
 Prepare data for processing fisheye output format. More...
 
static void fisheye_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in fisheye format. More...
 
static int prepare_fisheye_in (AVFilterContext *ctx)
 Prepare data for processing fisheye input format. More...
 
static void xyz_to_fisheye (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in fisheye format for corresponding 3D coordinates on sphere. More...
 
static void pannini_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in pannini format. More...
 
static int prepare_cylindrical_out (AVFilterContext *ctx)
 Prepare data for processing cylindrical output format. More...
 
static void cylindrical_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in cylindrical format. More...
 
static int prepare_cylindrical_in (AVFilterContext *ctx)
 Prepare data for processing cylindrical input format. More...
 
static void xyz_to_cylindrical (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in cylindrical format for corresponding 3D coordinates on sphere. More...
 
static void perspective_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in perspective format. More...
 
static void tetrahedron_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in tetrahedron format. More...
 
static void xyz_to_tetrahedron (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in tetrahedron format for corresponding 3D coordinates on sphere. More...
 
static void dfisheye_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in dual fisheye format. More...
 
static void 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)
 Calculate frame position in dual fisheye format for corresponding 3D coordinates on sphere. More...
 
static void barrel_to_xyz (const V360Context *s, int i, int j, int width, int height, float *vec)
 Calculate 3D coordinates on sphere for corresponding frame position in barrel facebook's format. More...
 
static void xyz_to_barrel (const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
 Calculate frame position in barrel facebook's format for corresponding 3D coordinates on sphere. More...
 
static void multiply_matrix (float c[3][3], const float a[3][3], const float b[3][3])
 
static void calculate_rotation_matrix (float yaw, float pitch, float roll, float rot_mat[3][3], const int rotation_order[3])
 Calculate rotation matrix for yaw/pitch/roll angles. More...
 
static void rotate (const float rot_mat[3][3], float *vec)
 Rotate vector with given rotation matrix. More...
 
static void set_mirror_modifier (int h_flip, int v_flip, int d_flip, float *modifier)
 
static void mirror (const float *modifier, float *vec)
 
static int allocate_plane (V360Context *s, int sizeof_uv, int sizeof_ker, int p)
 
static void fov_from_dfov (float d_fov, float w, float h, float *h_fov, float *v_fov)
 
static void set_dimensions (int *outw, int *outh, int w, int h, const AVPixFmtDescriptor *desc)
 
static av_always_inline int v360_slice (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int config_output (AVFilterLink *outlink)
 
static int filter_frame (AVFilterLink *inlink, AVFrame *in)
 
static av_cold void uninit (AVFilterContext *ctx)
 

Variables

static const AVOption v360_options []
 
static const AVFilterPad inputs []
 
static const AVFilterPad outputs []
 
AVFilter ff_vf_v360
 

Detailed Description

360 video conversion filter.

Principle of operation:

(for each pixel in output frame) 1) Calculate OpenGL-like coordinates (x, y, z) for pixel position (i, j) 2) Apply 360 operations (rotation, mirror) to (x, y, z) 3) Calculate pixel position (u, v) in input frame 4) Calculate interpolation window and weight for each pixel

(for each frame) 5) Remap input frame to output frame using precalculated data

Definition in file vf_v360.c.

Macro Definition Documentation

#define OFFSET (   x)    offsetof(V360Context, x)

Definition at line 53 of file vf_v360.c.

Definition at line 54 of file vf_v360.c.

#define DEFINE_REMAP1_LINE (   bits,
  div 
)
Value:
static void remap1_##bits##bit_line_c(uint8_t *dst, int width, const uint8_t *const src, \
ptrdiff_t in_linesize, \
const int16_t *const u, const int16_t *const v, \
const int16_t *const ker) \
{ \
const uint##bits##_t *const s = (const uint##bits##_t *const)src; \
uint##bits##_t *d = (uint##bits##_t *)dst; \
\
in_linesize /= div; \
for (int x = 0; x < width; x++) \
d[x] = s[v[x] * in_linesize + u[x]]; \
}
#define src
Definition: vp8dsp.c:254
uint8_t
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:252
uint8_t bits
Definition: vp3data.h:202
#define width
#define s(width, name)
Definition: cbs_vp9.c:257
for(j=16;j >0;--j)

Definition at line 221 of file vf_v360.c.

#define DEFINE_REMAP (   ws,
  bits 
)

Generate remapping function with a given window size and pixel depth.

Parameters
wssize of interpolation window
bitsnumber of bits per pixel

Definition at line 245 of file vf_v360.c.

#define DEFINE_REMAP_LINE (   ws,
  bits,
  div 
)
Value:
static void remap##ws##_##bits##bit_line_c(uint8_t *dst, int width, const uint8_t *const src, \
ptrdiff_t in_linesize, \
const int16_t *const u, const int16_t *const v, \
const int16_t *const ker) \
{ \
const uint##bits##_t *const s = (const uint##bits##_t *const)src; \
uint##bits##_t *d = (uint##bits##_t *)dst; \
\
in_linesize /= div; \
for (int x = 0; x < width; x++) { \
const int16_t *const uu = u + x * ws * ws; \
const int16_t *const vv = v + x * ws * ws; \
const int16_t *const kker = ker + x * ws * ws; \
int tmp = 0; \
for (int i = 0; i < ws; i++) { \
for (int j = 0; j < ws; j++) { \
tmp += kker[i * ws + j] * s[vv[i * ws + j] * in_linesize + uu[i * ws + j]]; \
} \
} \
\
d[x] = av_clip_uint##bits(tmp >> 14); \
} \
}
#define src
Definition: vp8dsp.c:254
uint8_t
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:252
#define _
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
uint8_t bits
Definition: vp3data.h:202
#define width
#define s(width, name)
Definition: cbs_vp9.c:257
static const int remap[16]
Definition: msvideo1enc.c:63
int
for(j=16;j >0;--j)
static uint8_t tmp[11]
Definition: aes_ctr.c:26

Definition at line 292 of file vf_v360.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( v360  )
static int query_formats ( AVFilterContext ctx)
static

Definition at line 151 of file vf_v360.c.

void ff_v360_init ( V360Context s,
int  depth 
)

Definition at line 324 of file vf_v360.c.

Referenced by config_output().

static void nearest_kernel ( float  du,
float  dv,
const XYRemap rmap,
int16_t *  u,
int16_t *  v,
int16_t *  ker 
)
static

Save nearest pixel coordinates for remapping.

Parameters
duhorizontal relative coordinate
dvvertical relative coordinate
rmapcalculated 4x4 window
uu remap data
vv remap data
kerker remap data

Definition at line 355 of file vf_v360.c.

Referenced by config_output().

static void bilinear_kernel ( float  du,
float  dv,
const XYRemap rmap,
int16_t *  u,
int16_t *  v,
int16_t *  ker 
)
static

Calculate kernel for bilinear interpolation.

Parameters
duhorizontal relative coordinate
dvvertical relative coordinate
rmapcalculated 4x4 window
uu remap data
vv remap data
kerker remap data

Definition at line 375 of file vf_v360.c.

Referenced by config_output().

static void calculate_bicubic_coeffs ( float  t,
float *  coeffs 
)
inlinestatic

Calculate 1-dimensional cubic coefficients.

Parameters
trelative coordinate
coeffscoefficients

Definition at line 397 of file vf_v360.c.

Referenced by bicubic_kernel().

static void bicubic_kernel ( float  du,
float  dv,
const XYRemap rmap,
int16_t *  u,
int16_t *  v,
int16_t *  ker 
)
static

Calculate kernel for bicubic interpolation.

Parameters
duhorizontal relative coordinate
dvvertical relative coordinate
rmapcalculated 4x4 window
uu remap data
vv remap data
kerker remap data

Definition at line 418 of file vf_v360.c.

Referenced by config_output().

static void calculate_lanczos_coeffs ( float  t,
float *  coeffs 
)
inlinestatic

Calculate 1-dimensional lanczos coefficients.

Parameters
trelative coordinate
coeffscoefficients

Definition at line 442 of file vf_v360.c.

Referenced by lanczos_kernel().

static void lanczos_kernel ( float  du,
float  dv,
const XYRemap rmap,
int16_t *  u,
int16_t *  v,
int16_t *  ker 
)
static

Calculate kernel for lanczos interpolation.

Parameters
duhorizontal relative coordinate
dvvertical relative coordinate
rmapcalculated 4x4 window
uu remap data
vv remap data
kerker remap data

Definition at line 471 of file vf_v360.c.

Referenced by config_output().

static void calculate_spline16_coeffs ( float  t,
float *  coeffs 
)
static

Calculate 1-dimensional spline16 coefficients.

Parameters
trelative coordinate
coeffscoefficients

Definition at line 495 of file vf_v360.c.

Referenced by spline16_kernel().

static void spline16_kernel ( float  du,
float  dv,
const XYRemap rmap,
int16_t *  u,
int16_t *  v,
int16_t *  ker 
)
static

Calculate kernel for spline16 interpolation.

Parameters
duhorizontal relative coordinate
dvvertical relative coordinate
rmapcalculated 4x4 window
uu remap data
vv remap data
kerker remap data

Definition at line 513 of file vf_v360.c.

Referenced by config_output().

static void calculate_gaussian_coeffs ( float  t,
float *  coeffs 
)
static

Calculate 1-dimensional gaussian coefficients.

Parameters
trelative coordinate
coeffscoefficients

Definition at line 537 of file vf_v360.c.

Referenced by gaussian_kernel().

static void gaussian_kernel ( float  du,
float  dv,
const XYRemap rmap,
int16_t *  u,
int16_t *  v,
int16_t *  ker 
)
static

Calculate kernel for gaussian interpolation.

Parameters
duhorizontal relative coordinate
dvvertical relative coordinate
rmapcalculated 4x4 window
uu remap data
vv remap data
kerker remap data

Definition at line 566 of file vf_v360.c.

Referenced by config_output().

static int mod ( int  a,
int  b 
)
inlinestatic

Modulo operation with only positive remainders.

Parameters
adividend
bdivisor
Returns
positive remainder of (a / b)

Definition at line 592 of file vf_v360.c.

Referenced by decode_init_static(), draw_sierpinski(), filter(), l1_unscale(), l2_unscale_group(), request_frame(), xyz_to_equirect(), and xyz_to_tetrahedron().

static int get_direction ( char  c)
static

Convert char to corresponding direction.

Used for cubemap options.

Definition at line 606 of file vf_v360.c.

Referenced by prepare_cube_in(), and prepare_cube_out().

static int get_rotation ( char  c)
static

Convert char to corresponding rotation angle.

Used for cubemap options.

Definition at line 630 of file vf_v360.c.

Referenced by prepare_cube_in(), and prepare_cube_out().

static int get_rorder ( char  c)
static

Convert char to corresponding rotation order.

Definition at line 649 of file vf_v360.c.

Referenced by config_output().

static int prepare_cube_in ( AVFilterContext ctx)
static

Prepare data for processing cubemap input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 673 of file vf_v360.c.

Referenced by config_output().

static int prepare_cube_out ( AVFilterContext ctx)
static

Prepare data for processing cubemap output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 727 of file vf_v360.c.

Referenced by config_output().

static void rotate_cube_face ( float *  uf,
float *  vf,
int  rotation 
)
inlinestatic

Definition at line 774 of file vf_v360.c.

Referenced by process_cube_coordinates(), and xyz_to_cube().

static void rotate_cube_face_inverse ( float *  uf,
float *  vf,
int  rotation 
)
inlinestatic

Definition at line 800 of file vf_v360.c.

Referenced by cube_to_xyz(), and process_cube_coordinates().

static void normalize_vector ( float *  vec)
static
static void cube_to_xyz ( const V360Context s,
float  uf,
float  vf,
int  face,
float *  vec,
float  scalew,
float  scaleh 
)
static

Calculate 3D coordinates on sphere for corresponding cubemap position.

Common operation for every cubemap.

Parameters
sfilter private context
ufhorizontal cubemap coordinate [0, 1)
vfvertical cubemap coordinate [0, 1)
faceface of cubemap
veccoordinates on sphere
scalewscale for uf
scalehscale for vf

Definition at line 852 of file vf_v360.c.

Referenced by cube1x6_to_xyz(), cube3x2_to_xyz(), and cube6x1_to_xyz().

static void xyz_to_cube ( const V360Context s,
const float *  vec,
float *  uf,
float *  vf,
int direction 
)
static

Calculate cubemap position for corresponding 3D coordinates on sphere.

Common operation for every cubemap.

Parameters
sfilter private context
veccoordinated on sphere
ufhorizontal cubemap coordinate [0, 1)
vfvertical cubemap coordinate [0, 1)
directiondirection of view

Definition at line 916 of file vf_v360.c.

Referenced by xyz_to_cube1x6(), xyz_to_cube3x2(), xyz_to_cube6x1(), and xyz_to_eac().

static void process_cube_coordinates ( const V360Context s,
float  uf,
float  vf,
int  direction,
float *  new_uf,
float *  new_vf,
int face 
)
static

Find position on another cube face in case of overflow/underflow.

Used for calculation of interpolation window.

Parameters
sfilter private context
ufhorizontal cubemap coordinate
vfvertical cubemap coordinate
directiondirection of view
new_ufnew horizontal cubemap coordinate
new_vfnew vertical cubemap coordinate
faceface position on cubemap

Definition at line 994 of file vf_v360.c.

Referenced by xyz_to_cube1x6(), xyz_to_cube3x2(), and xyz_to_cube6x1().

static void cube3x2_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in cubemap3x2 format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 1186 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_cube3x2 ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in cubemap3x2 format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 1223 of file vf_v360.c.

Referenced by config_output().

static void cube1x6_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in cubemap1x6 format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 1310 of file vf_v360.c.

Referenced by config_output().

static void cube6x1_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in cubemap6x1 format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 1341 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_cube1x6 ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in cubemap1x6 format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 1374 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_cube6x1 ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in cubemap6x1 format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 1452 of file vf_v360.c.

Referenced by config_output().

static void equirect_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in equirectangular format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 1528 of file vf_v360.c.

Referenced by config_output().

static int prepare_stereographic_out ( AVFilterContext ctx)
static

Prepare data for processing stereographic output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 1552 of file vf_v360.c.

Referenced by config_output().

static void stereographic_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in stereographic format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 1572 of file vf_v360.c.

Referenced by config_output().

static int prepare_stereographic_in ( AVFilterContext ctx)
static

Prepare data for processing stereographic input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 1594 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_stereographic ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in stereographic format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 1616 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_equirect ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in equirectangular format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 1655 of file vf_v360.c.

Referenced by config_output().

static int prepare_flat_in ( AVFilterContext ctx)
static

Prepare data for processing flat input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 1687 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_flat ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in flat format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 1709 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_mercator ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in mercator format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 1754 of file vf_v360.c.

Referenced by config_output().

static void mercator_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in mercator format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 1789 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_ball ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in ball format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 1819 of file vf_v360.c.

Referenced by config_output().

static void ball_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in ball format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 1855 of file vf_v360.c.

Referenced by config_output().

static void hammer_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in hammer format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 1886 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_hammer ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in hammer format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 1925 of file vf_v360.c.

Referenced by config_output().

static void sinusoidal_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in sinusoidal format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 1963 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_sinusoidal ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in sinusoidal format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 1994 of file vf_v360.c.

Referenced by config_output().

static int prepare_eac_in ( AVFilterContext ctx)
static

Prepare data for processing equi-angular cubemap input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2026 of file vf_v360.c.

Referenced by config_output().

static int prepare_eac_out ( AVFilterContext ctx)
static

Prepare data for processing equi-angular cubemap output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2086 of file vf_v360.c.

Referenced by config_output().

static void eac_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in equi-angular cubemap format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 2117 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_eac ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in equi-angular cubemap format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 2220 of file vf_v360.c.

Referenced by config_output().

static int prepare_flat_out ( AVFilterContext ctx)
static

Prepare data for processing flat output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2273 of file vf_v360.c.

Referenced by config_output().

static void flat_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in flat format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 2293 of file vf_v360.c.

Referenced by config_output().

static int prepare_fisheye_out ( AVFilterContext ctx)
static

Prepare data for processing fisheye output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2314 of file vf_v360.c.

Referenced by config_output().

static void fisheye_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in fisheye format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 2334 of file vf_v360.c.

Referenced by config_output().

static int prepare_fisheye_in ( AVFilterContext ctx)
static

Prepare data for processing fisheye input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2358 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_fisheye ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in fisheye format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 2380 of file vf_v360.c.

Referenced by config_output().

static void pannini_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in pannini format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 2420 of file vf_v360.c.

Referenced by config_output().

static int prepare_cylindrical_out ( AVFilterContext ctx)
static

Prepare data for processing cylindrical output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2449 of file vf_v360.c.

Referenced by config_output().

static void cylindrical_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in cylindrical format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 2469 of file vf_v360.c.

Referenced by config_output().

static int prepare_cylindrical_in ( AVFilterContext ctx)
static

Prepare data for processing cylindrical input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2498 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_cylindrical ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in cylindrical format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 2520 of file vf_v360.c.

Referenced by config_output().

static void perspective_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in perspective format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 2559 of file vf_v360.c.

Referenced by config_output().

static void tetrahedron_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in tetrahedron format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 2604 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_tetrahedron ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in tetrahedron format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 2630 of file vf_v360.c.

Referenced by config_output().

static void dfisheye_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in dual fisheye format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 2686 of file vf_v360.c.

Referenced by config_output().

static void 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 
)
static

Calculate frame position in dual fisheye format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 2727 of file vf_v360.c.

Referenced by config_output().

static void barrel_to_xyz ( const V360Context s,
int  i,
int  j,
int  width,
int  height,
float *  vec 
)
static

Calculate 3D coordinates on sphere for corresponding frame position in barrel facebook's format.

Parameters
sfilter private context
ihorizontal position on frame [0, width)
jvertical position on frame [0, height)
widthframe width
heightframe height
veccoordinates on sphere

Definition at line 2777 of file vf_v360.c.

Referenced by config_output().

static void xyz_to_barrel ( const V360Context s,
const float *  vec,
int  width,
int  height,
int16_t  us[4][4],
int16_t  vs[4][4],
float *  du,
float *  dv 
)
static

Calculate frame position in barrel facebook's format for corresponding 3D coordinates on sphere.

Parameters
sfilter private context
veccoordinates on sphere
widthframe width
heightframe height
ushorizontal coordinates for interpolation window
vsvertical coordinates for interpolation window
duhorizontal relative coordinate
dvvertical relative coordinate

Definition at line 2849 of file vf_v360.c.

Referenced by config_output().

static void multiply_matrix ( float  c[3][3],
const float  a[3][3],
const float  b[3][3] 
)
static

Definition at line 2910 of file vf_v360.c.

Referenced by calculate_rotation_matrix().

static void calculate_rotation_matrix ( float  yaw,
float  pitch,
float  roll,
float  rot_mat[3][3],
const int  rotation_order[3] 
)
inlinestatic

Calculate rotation matrix for yaw/pitch/roll angles.

Definition at line 2927 of file vf_v360.c.

Referenced by config_output().

static void rotate ( const float  rot_mat[3][3],
float *  vec 
)
inlinestatic

Rotate vector with given rotation matrix.

Parameters
rot_matrotation matrix
vecvector

Definition at line 2967 of file vf_v360.c.

Referenced by mov_read_tkhd(), and v360_slice().

static void set_mirror_modifier ( int  h_flip,
int  v_flip,
int  d_flip,
float *  modifier 
)
inlinestatic

Definition at line 2979 of file vf_v360.c.

Referenced by config_output().

static void mirror ( const float *  modifier,
float *  vec 
)
inlinestatic

Definition at line 2987 of file vf_v360.c.

Referenced by v360_slice().

static int allocate_plane ( V360Context s,
int  sizeof_uv,
int  sizeof_ker,
int  p 
)
static

Definition at line 2994 of file vf_v360.c.

Referenced by config_output().

static void fov_from_dfov ( float  d_fov,
float  w,
float  h,
float *  h_fov,
float *  v_fov 
)
static

Definition at line 3009 of file vf_v360.c.

Referenced by config_output().

static void set_dimensions ( int outw,
int outh,
int  w,
int  h,
const AVPixFmtDescriptor desc 
)
static

Definition at line 3023 of file vf_v360.c.

Referenced by config_output().

static av_always_inline int v360_slice ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 3032 of file vf_v360.c.

Referenced by config_output().

static int config_output ( AVFilterLink outlink)
static

Definition at line 3076 of file vf_v360.c.

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 3503 of file vf_v360.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 3527 of file vf_v360.c.

Variable Documentation

const AVOption v360_options[]
static

Definition at line 56 of file vf_v360.c.

const AVFilterPad inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_v360.c:3503

Definition at line 3538 of file vf_v360.c.

const AVFilterPad outputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_output,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int config_output(AVFilterLink *outlink)
Definition: vf_v360.c:3076

Definition at line 3547 of file vf_v360.c.

AVFilter ff_vf_v360
Initial value:
= {
.name = "v360",
.description = NULL_IF_CONFIG_SMALL("Convert 360 projection of video."),
.priv_size = sizeof(V360Context),
.priv_class = &v360_class,
}
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
static int query_formats(AVFilterContext *ctx)
Definition: vf_v360.c:151
static const AVFilterPad outputs[]
Definition: vf_v360.c:3547
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_v360.c:3527
static const AVFilterPad inputs[]
Definition: vf_v360.c:3538
#define flags(name, subs,...)
Definition: cbs_av1.c:564

Definition at line 3556 of file vf_v360.c.