FFmpeg
Data Structures | Macros | Functions | Variables
vf_v360.c File Reference
#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 TFLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_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_lagrange_coeffs (float t, float *coeffs)
 Calculate 1-dimensional lagrange coefficients. More...
 
static void lagrange_kernel (float du, float dv, const XYRemap *rmap, int16_t *u, int16_t *v, int16_t *ker)
 Calculate kernel for lagrange 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 void calculate_cubic_bc_coeffs (float t, float *coeffs, float b, float c)
 Calculate 1-dimensional cubic_bc_spline coefficients. More...
 
static void mitchell_kernel (float du, float dv, const XYRemap *rmap, int16_t *u, int16_t *v, int16_t *ker)
 Calculate kernel for mitchell interpolation. More...
 
static int mod (int a, int b)
 Modulo operation with only positive remainders. More...
 
static int reflecty (int y, int h)
 Reflect y operation. More...
 
static int ereflectx (int x, int y, int w, int h)
 Reflect x operation for equirect. More...
 
static int reflectx (int x, int y, int w, int h)
 Reflect x operation. 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 int 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 int 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 int 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 int 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 int 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 int 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 int prepare_equirect_out (AVFilterContext *ctx)
 Prepare data for processing equirectangular output format. More...
 
static int 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 hequirect_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 half equirectangular format. More...
 
static int prepare_stereographic_out (AVFilterContext *ctx)
 Prepare data for processing stereographic output format. More...
 
static int 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 int 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 int prepare_equisolid_out (AVFilterContext *ctx)
 Prepare data for processing equisolid output format. More...
 
static int equisolid_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 equisolid format. More...
 
static int prepare_equisolid_in (AVFilterContext *ctx)
 Prepare data for processing equisolid input format. More...
 
static int xyz_to_equisolid (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 equisolid format for corresponding 3D coordinates on sphere. More...
 
static int prepare_orthographic_out (AVFilterContext *ctx)
 Prepare data for processing orthographic output format. More...
 
static int orthographic_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 orthographic format. More...
 
static int prepare_orthographic_in (AVFilterContext *ctx)
 Prepare data for processing orthographic input format. More...
 
static int xyz_to_orthographic (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 orthographic format for corresponding 3D coordinates on sphere. More...
 
static int prepare_equirect_in (AVFilterContext *ctx)
 Prepare data for processing equirectangular input format. More...
 
static int 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 xyz_to_hequirect (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 half 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 int 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 int 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 int 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 int 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 int 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 int 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 int 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 int 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 int 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 int 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 int 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 int 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 int 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 int 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 int 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 xyz_to_pannini (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 pannini format for corresponding 3D coordinates on sphere. More...
 
static int prepare_cylindrical_out (AVFilterContext *ctx)
 Prepare data for processing cylindrical output format. More...
 
static int 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 int 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 int prepare_cylindricalea_out (AVFilterContext *ctx)
 Prepare data for processing cylindrical equal area output format. More...
 
static int prepare_cylindricalea_in (AVFilterContext *ctx)
 Prepare data for processing cylindrical equal area input format. More...
 
static int cylindricalea_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 equal area format. More...
 
static int xyz_to_cylindricalea (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 equal area format for corresponding 3D coordinates on sphere. More...
 
static int 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 int 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 int 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 int 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 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)
 Calculate frame position in dual fisheye format for corresponding 3D coordinates on sphere. More...
 
static int 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 int 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 int xyz_to_barrelsplit (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 split facebook's format for corresponding 3D coordinates on sphere. More...
 
static int barrelsplit_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 split facebook's format. More...
 
static int tspyramid_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 tspyramid format. More...
 
static int xyz_to_tspyramid (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 tspyramid format for corresponding 3D coordinates on sphere. More...
 
static int octahedron_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 octahedron format. More...
 
static int xyz_to_octahedron (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 octahedron format for corresponding 3D coordinates on sphere. More...
 
static void multiply_quaternion (float c[4], const float a[4], const float b[4])
 
static void conjugate_quaternion (float d[4], const float q[4])
 
static void calculate_rotation (float yaw, float pitch, float roll, float rot_quaternion[2][4], const int rotation_order[3])
 Calculate rotation quaternion for yaw/pitch/roll angles. More...
 
static void rotate (const float rot_quaternion[2][4], float *vec)
 Rotate vector with given rotation quaternion. 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 void input_flip (int16_t u[4][4], int16_t v[4][4], int w, int h, int hflip, int vflip)
 
static int allocate_plane (V360Context *s, int sizeof_uv, int sizeof_ker, int sizeof_mask, int p)
 
static void fov_from_dfov (int format, 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 int process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
 
static av_cold int init (AVFilterContext *ctx)
 
static av_cold void uninit (AVFilterContext *ctx)
 

Variables

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

◆ OFFSET

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

Definition at line 53 of file vf_v360.c.

◆ FLAGS

Definition at line 54 of file vf_v360.c.

◆ TFLAGS

Definition at line 55 of file vf_v360.c.

◆ DEFINE_REMAP1_LINE

#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]]; \
}

Definition at line 256 of file vf_v360.c.

◆ DEFINE_REMAP

#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 280 of file vf_v360.c.

◆ DEFINE_REMAP_LINE

#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++) { \
const int iws = i * ws; \
for (int j = 0; j < ws; j++) { \
tmp += kker[iws + j] * s[vv[iws + j] * in_linesize + uu[iws + j]]; \
} \
} \
\
d[x] = av_clip_uint##bits(tmp >> 14); \
} \
}

Definition at line 336 of file vf_v360.c.

Function Documentation

◆ AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS ( v360  )

◆ query_formats()

static int query_formats ( AVFilterContext ctx)
static

Definition at line 172 of file vf_v360.c.

◆ ff_v360_init()

void ff_v360_init ( V360Context s,
int  depth 
)

Definition at line 371 of file vf_v360.c.

Referenced by config_output().

◆ nearest_kernel()

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 406 of file vf_v360.c.

Referenced by config_output().

◆ bilinear_kernel()

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 426 of file vf_v360.c.

Referenced by config_output().

◆ calculate_lagrange_coeffs()

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

Calculate 1-dimensional lagrange coefficients.

Parameters
trelative coordinate
coeffscoefficients

Definition at line 448 of file vf_v360.c.

Referenced by lagrange_kernel().

◆ lagrange_kernel()

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

Calculate kernel for lagrange interpolation.

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

Definition at line 465 of file vf_v360.c.

Referenced by config_output().

◆ calculate_bicubic_coeffs()

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

Calculate 1-dimensional cubic coefficients.

Parameters
trelative coordinate
coeffscoefficients

Definition at line 489 of file vf_v360.c.

Referenced by bicubic_kernel().

◆ 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 510 of file vf_v360.c.

Referenced by config_output().

◆ calculate_lanczos_coeffs()

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

Calculate 1-dimensional lanczos coefficients.

Parameters
trelative coordinate
coeffscoefficients

Definition at line 534 of file vf_v360.c.

Referenced by lanczos_kernel().

◆ 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 563 of file vf_v360.c.

Referenced by config_output().

◆ calculate_spline16_coeffs()

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

Calculate 1-dimensional spline16 coefficients.

Parameters
trelative coordinate
coeffscoefficients

Definition at line 587 of file vf_v360.c.

Referenced by spline16_kernel().

◆ 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 605 of file vf_v360.c.

Referenced by config_output().

◆ calculate_gaussian_coeffs()

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

Calculate 1-dimensional gaussian coefficients.

Parameters
trelative coordinate
coeffscoefficients

Definition at line 629 of file vf_v360.c.

Referenced by gaussian_kernel().

◆ 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 658 of file vf_v360.c.

Referenced by config_output().

◆ calculate_cubic_bc_coeffs()

static void calculate_cubic_bc_coeffs ( float  t,
float *  coeffs,
float  b,
float  c 
)
static

Calculate 1-dimensional cubic_bc_spline coefficients.

Parameters
trelative coordinate
coeffscoefficients

Definition at line 682 of file vf_v360.c.

Referenced by mitchell_kernel().

◆ mitchell_kernel()

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

Calculate kernel for mitchell interpolation.

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

Definition at line 723 of file vf_v360.c.

Referenced by config_output().

◆ mod()

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 749 of file vf_v360.c.

Referenced by av_compare_mod(), check_extensions(), choose_vlc_set(), draw_sierpinski(), ereflectx(), filter(), l1_unscale(), l2_unscale_group(), mpegaudiodec_common_init_static(), reflectx(), and request_frame().

◆ reflecty()

static int reflecty ( int  y,
int  h 
)
inlinestatic

Reflect y operation.

Parameters
yinput vertical position
hinput height

Definition at line 765 of file vf_v360.c.

Referenced by xyz_to_equirect(), xyz_to_tetrahedron(), and xyz_to_tspyramid().

◆ ereflectx()

static int ereflectx ( int  x,
int  y,
int  w,
int  h 
)
inlinestatic

Reflect x operation for equirect.

Parameters
xinput horizontal position
yinput vertical position
winput width
hinput height

Definition at line 784 of file vf_v360.c.

Referenced by xyz_to_equirect().

◆ reflectx()

static int reflectx ( int  x,
int  y,
int  w,
int  h 
)
inlinestatic

Reflect x operation.

Parameters
xinput horizontal position
yinput vertical position
winput width
hinput height

Definition at line 800 of file vf_v360.c.

Referenced by xyz_to_tetrahedron(), and xyz_to_tspyramid().

◆ get_direction()

static int get_direction ( char  c)
static

Convert char to corresponding direction.

Used for cubemap options.

Definition at line 812 of file vf_v360.c.

Referenced by prepare_cube_in(), and prepare_cube_out().

◆ get_rotation()

static int get_rotation ( char  c)
static

Convert char to corresponding rotation angle.

Used for cubemap options.

Definition at line 836 of file vf_v360.c.

Referenced by prepare_cube_in(), and prepare_cube_out().

◆ get_rorder()

static int get_rorder ( char  c)
static

Convert char to corresponding rotation order.

Definition at line 855 of file vf_v360.c.

Referenced by config_output().

◆ prepare_cube_in()

static int prepare_cube_in ( AVFilterContext ctx)
static

Prepare data for processing cubemap input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 879 of file vf_v360.c.

Referenced by config_output().

◆ prepare_cube_out()

static int prepare_cube_out ( AVFilterContext ctx)
static

Prepare data for processing cubemap output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 933 of file vf_v360.c.

Referenced by config_output().

◆ rotate_cube_face()

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

Definition at line 980 of file vf_v360.c.

Referenced by process_cube_coordinates(), and xyz_to_cube().

◆ rotate_cube_face_inverse()

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

Definition at line 1006 of file vf_v360.c.

Referenced by cube_to_xyz(), and process_cube_coordinates().

◆ normalize_vector()

static void normalize_vector ( float *  vec)
static

◆ cube_to_xyz()

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 1058 of file vf_v360.c.

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

◆ xyz_to_cube()

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 1122 of file vf_v360.c.

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

◆ process_cube_coordinates()

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 1197 of file vf_v360.c.

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

◆ cube3x2_to_xyz()

static int 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 1389 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_cube3x2()

static int 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 1428 of file vf_v360.c.

Referenced by config_output().

◆ cube1x6_to_xyz()

static int 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 1517 of file vf_v360.c.

Referenced by config_output().

◆ cube6x1_to_xyz()

static int 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 1550 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_cube1x6()

static int 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 1585 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_cube6x1()

static int 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 1665 of file vf_v360.c.

Referenced by config_output().

◆ prepare_equirect_out()

static int prepare_equirect_out ( AVFilterContext ctx)
static

Prepare data for processing equirectangular output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 1740 of file vf_v360.c.

Referenced by config_output().

◆ equirect_to_xyz()

static int 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 1760 of file vf_v360.c.

Referenced by config_output().

◆ hequirect_to_xyz()

static int hequirect_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 half 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 1789 of file vf_v360.c.

Referenced by config_output().

◆ prepare_stereographic_out()

static int prepare_stereographic_out ( AVFilterContext ctx)
static

Prepare data for processing stereographic output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 1815 of file vf_v360.c.

Referenced by config_output().

◆ stereographic_to_xyz()

static int 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 1835 of file vf_v360.c.

Referenced by config_output().

◆ prepare_stereographic_in()

static int prepare_stereographic_in ( AVFilterContext ctx)
static

Prepare data for processing stereographic input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 1861 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_stereographic()

static int 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 1883 of file vf_v360.c.

Referenced by config_output().

◆ prepare_equisolid_out()

static int prepare_equisolid_out ( AVFilterContext ctx)
static

Prepare data for processing equisolid output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 1921 of file vf_v360.c.

Referenced by config_output().

◆ equisolid_to_xyz()

static int equisolid_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 equisolid 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 1941 of file vf_v360.c.

Referenced by config_output().

◆ prepare_equisolid_in()

static int prepare_equisolid_in ( AVFilterContext ctx)
static

Prepare data for processing equisolid input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 1967 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_equisolid()

static int xyz_to_equisolid ( 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 equisolid 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 1989 of file vf_v360.c.

Referenced by config_output().

◆ prepare_orthographic_out()

static int prepare_orthographic_out ( AVFilterContext ctx)
static

Prepare data for processing orthographic output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2027 of file vf_v360.c.

Referenced by config_output().

◆ orthographic_to_xyz()

static int orthographic_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 orthographic 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 2047 of file vf_v360.c.

Referenced by config_output().

◆ prepare_orthographic_in()

static int prepare_orthographic_in ( AVFilterContext ctx)
static

Prepare data for processing orthographic input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2072 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_orthographic()

static int xyz_to_orthographic ( 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 orthographic 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 2094 of file vf_v360.c.

Referenced by config_output().

◆ prepare_equirect_in()

static int prepare_equirect_in ( AVFilterContext ctx)
static

Prepare data for processing equirectangular input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2132 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_equirect()

static int 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 2154 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_hequirect()

static int xyz_to_hequirect ( 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 half 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 2195 of file vf_v360.c.

Referenced by config_output().

◆ prepare_flat_in()

static int prepare_flat_in ( AVFilterContext ctx)
static

Prepare data for processing flat input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2230 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_flat()

static int 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 2252 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_mercator()

static int 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 2299 of file vf_v360.c.

Referenced by config_output().

◆ mercator_to_xyz()

static int 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 2335 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_ball()

static int 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 2367 of file vf_v360.c.

Referenced by config_output().

◆ ball_to_xyz()

static int 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 2403 of file vf_v360.c.

Referenced by config_output().

◆ hammer_to_xyz()

static int 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 2437 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_hammer()

static int 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 2478 of file vf_v360.c.

Referenced by config_output().

◆ sinusoidal_to_xyz()

static int 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 2517 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_sinusoidal()

static int 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 2550 of file vf_v360.c.

Referenced by config_output().

◆ prepare_eac_in()

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 2583 of file vf_v360.c.

Referenced by config_output().

◆ prepare_eac_out()

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 2611 of file vf_v360.c.

Referenced by config_output().

◆ eac_to_xyz()

static int 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 2642 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_eac()

static int 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 2747 of file vf_v360.c.

Referenced by config_output().

◆ prepare_flat_out()

static int prepare_flat_out ( AVFilterContext ctx)
static

Prepare data for processing flat output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2802 of file vf_v360.c.

Referenced by config_output().

◆ flat_to_xyz()

static int 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 2822 of file vf_v360.c.

Referenced by config_output().

◆ prepare_fisheye_out()

static int prepare_fisheye_out ( AVFilterContext ctx)
static

Prepare data for processing fisheye output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2845 of file vf_v360.c.

Referenced by config_output().

◆ fisheye_to_xyz()

static int 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 2865 of file vf_v360.c.

Referenced by config_output().

◆ prepare_fisheye_in()

static int prepare_fisheye_in ( AVFilterContext ctx)
static

Prepare data for processing fisheye input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 2896 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_fisheye()

static int 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 2918 of file vf_v360.c.

Referenced by config_output().

◆ pannini_to_xyz()

static int 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 2961 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_pannini()

static int xyz_to_pannini ( 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 pannini 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 2997 of file vf_v360.c.

Referenced by config_output().

◆ prepare_cylindrical_out()

static int prepare_cylindrical_out ( AVFilterContext ctx)
static

Prepare data for processing cylindrical output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 3038 of file vf_v360.c.

Referenced by config_output().

◆ cylindrical_to_xyz()

static int 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 3058 of file vf_v360.c.

Referenced by config_output().

◆ prepare_cylindrical_in()

static int prepare_cylindrical_in ( AVFilterContext ctx)
static

Prepare data for processing cylindrical input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 3089 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_cylindrical()

static int 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 3111 of file vf_v360.c.

Referenced by config_output().

◆ prepare_cylindricalea_out()

static int prepare_cylindricalea_out ( AVFilterContext ctx)
static

Prepare data for processing cylindrical equal area output format.

Parameters
ctxfilter context
Returns
error code

Definition at line 3148 of file vf_v360.c.

Referenced by config_output().

◆ prepare_cylindricalea_in()

static int prepare_cylindricalea_in ( AVFilterContext ctx)
static

Prepare data for processing cylindrical equal area input format.

Parameters
ctxfilter context
Returns
error code

Definition at line 3165 of file vf_v360.c.

Referenced by config_output().

◆ cylindricalea_to_xyz()

static int cylindricalea_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 equal area 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 3185 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_cylindricalea()

static int xyz_to_cylindricalea ( 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 equal area 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 3221 of file vf_v360.c.

Referenced by config_output().

◆ perspective_to_xyz()

static int 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 3261 of file vf_v360.c.

Referenced by config_output().

◆ tetrahedron_to_xyz()

static int 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 3307 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_tetrahedron()

static int 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 3335 of file vf_v360.c.

Referenced by config_output().

◆ dfisheye_to_xyz()

static int 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 3390 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_dfisheye()

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 
)
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 3431 of file vf_v360.c.

Referenced by config_output().

◆ barrel_to_xyz()

static int 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 3481 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_barrel()

static int 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 3555 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_barrelsplit()

static int xyz_to_barrelsplit ( 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 split 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 3627 of file vf_v360.c.

Referenced by config_output().

◆ barrelsplit_to_xyz()

static int barrelsplit_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 split 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 3721 of file vf_v360.c.

Referenced by config_output().

◆ tspyramid_to_xyz()

static int tspyramid_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 tspyramid 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 3811 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_tspyramid()

static int xyz_to_tspyramid ( 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 tspyramid 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 3871 of file vf_v360.c.

Referenced by config_output().

◆ octahedron_to_xyz()

static int octahedron_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 octahedron 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 3939 of file vf_v360.c.

Referenced by config_output().

◆ xyz_to_octahedron()

static int xyz_to_octahedron ( 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 octahedron 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 3974 of file vf_v360.c.

Referenced by config_output().

◆ multiply_quaternion()

static void multiply_quaternion ( float  c[4],
const float  a[4],
const float  b[4] 
)
static

Definition at line 4014 of file vf_v360.c.

Referenced by calculate_rotation(), and rotate().

◆ conjugate_quaternion()

static void conjugate_quaternion ( float  d[4],
const float  q[4] 
)
static

Definition at line 4022 of file vf_v360.c.

Referenced by calculate_rotation().

◆ calculate_rotation()

static void calculate_rotation ( float  yaw,
float  pitch,
float  roll,
float  rot_quaternion[2][4],
const int  rotation_order[3] 
)
inlinestatic

Calculate rotation quaternion for yaw/pitch/roll angles.

Definition at line 4033 of file vf_v360.c.

Referenced by config_output().

◆ rotate()

static void rotate ( const float  rot_quaternion[2][4],
float *  vec 
)
inlinestatic

Rotate vector with given rotation quaternion.

Parameters
rot_quaternionrotation quaternion
vecvector

Definition at line 4068 of file vf_v360.c.

Referenced by hq3x_interp_2x1(), and v360_slice().

◆ set_mirror_modifier()

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

Definition at line 4086 of file vf_v360.c.

Referenced by config_output().

◆ mirror()

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

◆ input_flip()

static void input_flip ( int16_t  u[4][4],
int16_t  v[4][4],
int  w,
int  h,
int  hflip,
int  vflip 
)
inlinestatic

Definition at line 4101 of file vf_v360.c.

Referenced by v360_slice().

◆ allocate_plane()

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

Definition at line 4118 of file vf_v360.c.

Referenced by config_output().

◆ fov_from_dfov()

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

Definition at line 4152 of file vf_v360.c.

Referenced by config_output().

◆ set_dimensions()

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

Definition at line 4225 of file vf_v360.c.

Referenced by config_output().

◆ v360_slice()

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

Definition at line 4234 of file vf_v360.c.

Referenced by config_output().

◆ config_output()

static int config_output ( AVFilterLink outlink)
static

Definition at line 4293 of file vf_v360.c.

Referenced by process_command().

◆ filter_frame()

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 4898 of file vf_v360.c.

◆ process_command()

static int process_command ( AVFilterContext ctx,
const char *  cmd,
const char *  args,
char *  res,
int  res_len,
int  flags 
)
static

Definition at line 4922 of file vf_v360.c.

◆ init()

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 4937 of file vf_v360.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 4947 of file vf_v360.c.

Variable Documentation

◆ v360_options

const AVOption v360_options[]
static

Definition at line 57 of file vf_v360.c.

◆ inputs

const AVFilterPad inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
},
{ NULL }
}

Definition at line 4966 of file vf_v360.c.

◆ outputs

const AVFilterPad outputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_output,
},
{ NULL }
}

Definition at line 4975 of file vf_v360.c.

◆ ff_vf_v360

const AVFilter ff_vf_v360
Initial value:
= {
.name = "v360",
.description = NULL_IF_CONFIG_SMALL("Convert 360 projection of video."),
.priv_size = sizeof(V360Context),
.init = init,
.priv_class = &v360_class,
}

Definition at line 4984 of file vf_v360.c.

u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:264
outputs
static const AVFilterPad outputs[]
Definition: vf_v360.c:4975
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:26
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_v360.c:4898
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_v360.c:4937
inputs
static const AVFilterPad inputs[]
Definition: vf_v360.c:4966
width
#define width
s
#define s(width, name)
Definition: cbs_vp9.c:257
bits
uint8_t bits
Definition: vp3data.h:141
NULL
#define NULL
Definition: coverity.c:32
src
#define src
Definition: vp8dsp.c:255
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:116
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_v360.c:4947
remap
static const int remap[16]
Definition: msvideo1enc.c:64
V360Context
Definition: v360.h:120
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_v360.c:4922
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_v360.c:172
i
int i
Definition: input.c:406
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_v360.c:4293
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
_
#define _
d
d
Definition: ffmpeg_filter.c:156
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561