FFmpeg
Loading...
Searching...
No Matches
vf_v360.c
Go to the documentation of this file.
1/*
2 * Copyright (c) 2019 Eugene Lyapustin
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * 360 video conversion filter.
24 * Principle of operation:
25 *
26 * (for each pixel in output frame)
27 * 1) Calculate OpenGL-like coordinates (x, y, z) for pixel position (i, j)
28 * 2) Apply 360 operations (rotation, mirror) to (x, y, z)
29 * 3) Calculate pixel position (u, v) in input frame
30 * 4) Calculate interpolation window and weight for each pixel
31 *
32 * (for each frame)
33 * 5) Remap input frame to output frame using precalculated data
34 */
35
36#include <math.h>
37
38#include "libavutil/avassert.h"
39#include "libavutil/mem.h"
40#include "libavutil/pixdesc.h"
41#include "libavutil/opt.h"
42#include "avfilter.h"
43#include "filters.h"
44#include "formats.h"
45#include "video.h"
46#include "v360.h"
47
48typedef struct ThreadData {
49 AVFrame *in;
50 AVFrame *out;
51} ThreadData;
52
53#define OFFSET(x) offsetof(V360Context, x)
54#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
55#define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
56
57static const AVOption v360_options[] = {
58 { "input", "set input projection", OFFSET(in), AV_OPT_TYPE_INT, {.i64=EQUIRECTANGULAR}, 0, NB_PROJECTIONS-1, FLAGS, .unit = "in" },
59 { "e", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIRECTANGULAR}, 0, 0, FLAGS, .unit = "in" },
60 { "equirect", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIRECTANGULAR}, 0, 0, FLAGS, .unit = "in" },
61 { "c3x2", "cubemap 3x2", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_3_2}, 0, 0, FLAGS, .unit = "in" },
62 { "c6x1", "cubemap 6x1", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_6_1}, 0, 0, FLAGS, .unit = "in" },
63 { "eac", "equi-angular cubemap", 0, AV_OPT_TYPE_CONST, {.i64=EQUIANGULAR}, 0, 0, FLAGS, .unit = "in" },
64 { "dfisheye", "dual fisheye", 0, AV_OPT_TYPE_CONST, {.i64=DUAL_FISHEYE}, 0, 0, FLAGS, .unit = "in" },
65 { "flat", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, .unit = "in" },
66 {"rectilinear", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, .unit = "in" },
67 { "gnomonic", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, .unit = "in" },
68 { "barrel", "barrel facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL}, 0, 0, FLAGS, .unit = "in" },
69 { "fb", "barrel facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL}, 0, 0, FLAGS, .unit = "in" },
70 { "c1x6", "cubemap 1x6", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_1_6}, 0, 0, FLAGS, .unit = "in" },
71 { "sg", "stereographic", 0, AV_OPT_TYPE_CONST, {.i64=STEREOGRAPHIC}, 0, 0, FLAGS, .unit = "in" },
72 { "mercator", "mercator", 0, AV_OPT_TYPE_CONST, {.i64=MERCATOR}, 0, 0, FLAGS, .unit = "in" },
73 { "ball", "ball", 0, AV_OPT_TYPE_CONST, {.i64=BALL}, 0, 0, FLAGS, .unit = "in" },
74 { "hammer", "hammer", 0, AV_OPT_TYPE_CONST, {.i64=HAMMER}, 0, 0, FLAGS, .unit = "in" },
75 {"sinusoidal", "sinusoidal", 0, AV_OPT_TYPE_CONST, {.i64=SINUSOIDAL}, 0, 0, FLAGS, .unit = "in" },
76 { "fisheye", "fisheye", 0, AV_OPT_TYPE_CONST, {.i64=FISHEYE}, 0, 0, FLAGS, .unit = "in" },
77 { "pannini", "pannini", 0, AV_OPT_TYPE_CONST, {.i64=PANNINI}, 0, 0, FLAGS, .unit = "in" },
78 {"cylindrical", "cylindrical", 0, AV_OPT_TYPE_CONST, {.i64=CYLINDRICAL}, 0, 0, FLAGS, .unit = "in" },
79 {"tetrahedron", "tetrahedron", 0, AV_OPT_TYPE_CONST, {.i64=TETRAHEDRON}, 0, 0, FLAGS, .unit = "in" },
80 {"barrelsplit", "barrel split facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL_SPLIT}, 0, 0, FLAGS, .unit = "in" },
81 { "tsp", "truncated square pyramid", 0, AV_OPT_TYPE_CONST, {.i64=TSPYRAMID}, 0, 0, FLAGS, .unit = "in" },
82 { "hequirect", "half equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=HEQUIRECTANGULAR},0, 0, FLAGS, .unit = "in" },
83 { "he", "half equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=HEQUIRECTANGULAR},0, 0, FLAGS, .unit = "in" },
84 { "equisolid", "equisolid", 0, AV_OPT_TYPE_CONST, {.i64=EQUISOLID}, 0, 0, FLAGS, .unit = "in" },
85 { "og", "orthographic", 0, AV_OPT_TYPE_CONST, {.i64=ORTHOGRAPHIC}, 0, 0, FLAGS, .unit = "in" },
86 {"octahedron", "octahedron", 0, AV_OPT_TYPE_CONST, {.i64=OCTAHEDRON}, 0, 0, FLAGS, .unit = "in" },
87 {"cylindricalea", "cylindrical equal area", 0, AV_OPT_TYPE_CONST, {.i64=CYLINDRICALEA}, 0, 0, FLAGS, .unit = "in" },
88 { "output", "set output projection", OFFSET(out), AV_OPT_TYPE_INT, {.i64=CUBEMAP_3_2}, 0, NB_PROJECTIONS-1, FLAGS, .unit = "out" },
89 { "e", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIRECTANGULAR}, 0, 0, FLAGS, .unit = "out" },
90 { "equirect", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIRECTANGULAR}, 0, 0, FLAGS, .unit = "out" },
91 { "c3x2", "cubemap 3x2", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_3_2}, 0, 0, FLAGS, .unit = "out" },
92 { "c6x1", "cubemap 6x1", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_6_1}, 0, 0, FLAGS, .unit = "out" },
93 { "eac", "equi-angular cubemap", 0, AV_OPT_TYPE_CONST, {.i64=EQUIANGULAR}, 0, 0, FLAGS, .unit = "out" },
94 { "dfisheye", "dual fisheye", 0, AV_OPT_TYPE_CONST, {.i64=DUAL_FISHEYE}, 0, 0, FLAGS, .unit = "out" },
95 { "flat", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, .unit = "out" },
96 {"rectilinear", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, .unit = "out" },
97 { "gnomonic", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, .unit = "out" },
98 { "barrel", "barrel facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL}, 0, 0, FLAGS, .unit = "out" },
99 { "fb", "barrel facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL}, 0, 0, FLAGS, .unit = "out" },
100 { "c1x6", "cubemap 1x6", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_1_6}, 0, 0, FLAGS, .unit = "out" },
101 { "sg", "stereographic", 0, AV_OPT_TYPE_CONST, {.i64=STEREOGRAPHIC}, 0, 0, FLAGS, .unit = "out" },
102 { "mercator", "mercator", 0, AV_OPT_TYPE_CONST, {.i64=MERCATOR}, 0, 0, FLAGS, .unit = "out" },
103 { "ball", "ball", 0, AV_OPT_TYPE_CONST, {.i64=BALL}, 0, 0, FLAGS, .unit = "out" },
104 { "hammer", "hammer", 0, AV_OPT_TYPE_CONST, {.i64=HAMMER}, 0, 0, FLAGS, .unit = "out" },
105 {"sinusoidal", "sinusoidal", 0, AV_OPT_TYPE_CONST, {.i64=SINUSOIDAL}, 0, 0, FLAGS, .unit = "out" },
106 { "fisheye", "fisheye", 0, AV_OPT_TYPE_CONST, {.i64=FISHEYE}, 0, 0, FLAGS, .unit = "out" },
107 { "pannini", "pannini", 0, AV_OPT_TYPE_CONST, {.i64=PANNINI}, 0, 0, FLAGS, .unit = "out" },
108 {"cylindrical", "cylindrical", 0, AV_OPT_TYPE_CONST, {.i64=CYLINDRICAL}, 0, 0, FLAGS, .unit = "out" },
109 {"perspective", "perspective", 0, AV_OPT_TYPE_CONST, {.i64=PERSPECTIVE}, 0, 0, FLAGS, .unit = "out" },
110 {"tetrahedron", "tetrahedron", 0, AV_OPT_TYPE_CONST, {.i64=TETRAHEDRON}, 0, 0, FLAGS, .unit = "out" },
111 {"barrelsplit", "barrel split facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL_SPLIT}, 0, 0, FLAGS, .unit = "out" },
112 { "tsp", "truncated square pyramid", 0, AV_OPT_TYPE_CONST, {.i64=TSPYRAMID}, 0, 0, FLAGS, .unit = "out" },
113 { "hequirect", "half equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=HEQUIRECTANGULAR},0, 0, FLAGS, .unit = "out" },
114 { "he", "half equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=HEQUIRECTANGULAR},0, 0, FLAGS, .unit = "out" },
115 { "equisolid", "equisolid", 0, AV_OPT_TYPE_CONST, {.i64=EQUISOLID}, 0, 0, FLAGS, .unit = "out" },
116 { "og", "orthographic", 0, AV_OPT_TYPE_CONST, {.i64=ORTHOGRAPHIC}, 0, 0, FLAGS, .unit = "out" },
117 {"octahedron", "octahedron", 0, AV_OPT_TYPE_CONST, {.i64=OCTAHEDRON}, 0, 0, FLAGS, .unit = "out" },
118 {"cylindricalea", "cylindrical equal area", 0, AV_OPT_TYPE_CONST, {.i64=CYLINDRICALEA}, 0, 0, FLAGS, .unit = "out" },
119 { "interp", "set interpolation method", OFFSET(interp), AV_OPT_TYPE_INT, {.i64=BILINEAR}, 0, NB_INTERP_METHODS-1, FLAGS, .unit = "interp" },
120 { "near", "nearest neighbour", 0, AV_OPT_TYPE_CONST, {.i64=NEAREST}, 0, 0, FLAGS, .unit = "interp" },
121 { "nearest", "nearest neighbour", 0, AV_OPT_TYPE_CONST, {.i64=NEAREST}, 0, 0, FLAGS, .unit = "interp" },
122 { "line", "bilinear interpolation", 0, AV_OPT_TYPE_CONST, {.i64=BILINEAR}, 0, 0, FLAGS, .unit = "interp" },
123 { "linear", "bilinear interpolation", 0, AV_OPT_TYPE_CONST, {.i64=BILINEAR}, 0, 0, FLAGS, .unit = "interp" },
124 { "lagrange9", "lagrange9 interpolation", 0, AV_OPT_TYPE_CONST, {.i64=LAGRANGE9}, 0, 0, FLAGS, .unit = "interp" },
125 { "cube", "bicubic interpolation", 0, AV_OPT_TYPE_CONST, {.i64=BICUBIC}, 0, 0, FLAGS, .unit = "interp" },
126 { "cubic", "bicubic interpolation", 0, AV_OPT_TYPE_CONST, {.i64=BICUBIC}, 0, 0, FLAGS, .unit = "interp" },
127 { "lanc", "lanczos interpolation", 0, AV_OPT_TYPE_CONST, {.i64=LANCZOS}, 0, 0, FLAGS, .unit = "interp" },
128 { "lanczos", "lanczos interpolation", 0, AV_OPT_TYPE_CONST, {.i64=LANCZOS}, 0, 0, FLAGS, .unit = "interp" },
129 { "sp16", "spline16 interpolation", 0, AV_OPT_TYPE_CONST, {.i64=SPLINE16}, 0, 0, FLAGS, .unit = "interp" },
130 { "spline16", "spline16 interpolation", 0, AV_OPT_TYPE_CONST, {.i64=SPLINE16}, 0, 0, FLAGS, .unit = "interp" },
131 { "gauss", "gaussian interpolation", 0, AV_OPT_TYPE_CONST, {.i64=GAUSSIAN}, 0, 0, FLAGS, .unit = "interp" },
132 { "gaussian", "gaussian interpolation", 0, AV_OPT_TYPE_CONST, {.i64=GAUSSIAN}, 0, 0, FLAGS, .unit = "interp" },
133 { "mitchell", "mitchell interpolation", 0, AV_OPT_TYPE_CONST, {.i64=MITCHELL}, 0, 0, FLAGS, .unit = "interp" },
134 { "w", "output width", OFFSET(width), AV_OPT_TYPE_INT, {.i64=0}, 0, INT16_MAX, FLAGS, .unit = "w"},
135 { "h", "output height", OFFSET(height), AV_OPT_TYPE_INT, {.i64=0}, 0, INT16_MAX, FLAGS, .unit = "h"},
136 { "in_stereo", "input stereo format", OFFSET(in_stereo), AV_OPT_TYPE_INT, {.i64=STEREO_2D}, 0, NB_STEREO_FMTS-1, FLAGS, .unit = "stereo" },
137 {"out_stereo", "output stereo format", OFFSET(out_stereo), AV_OPT_TYPE_INT, {.i64=STEREO_2D}, 0, NB_STEREO_FMTS-1, FLAGS, .unit = "stereo" },
138 { "2d", "2d mono", 0, AV_OPT_TYPE_CONST, {.i64=STEREO_2D}, 0, 0, FLAGS, .unit = "stereo" },
139 { "sbs", "side by side", 0, AV_OPT_TYPE_CONST, {.i64=STEREO_SBS}, 0, 0, FLAGS, .unit = "stereo" },
140 { "tb", "top bottom", 0, AV_OPT_TYPE_CONST, {.i64=STEREO_TB}, 0, 0, FLAGS, .unit = "stereo" },
141 { "in_forder", "input cubemap face order", OFFSET(in_forder), AV_OPT_TYPE_STRING, {.str="rludfb"}, 0, NB_DIRECTIONS-1, FLAGS, .unit = "in_forder"},
142 {"out_forder", "output cubemap face order", OFFSET(out_forder), AV_OPT_TYPE_STRING, {.str="rludfb"}, 0, NB_DIRECTIONS-1, FLAGS, .unit = "out_forder"},
143 { "in_frot", "input cubemap face rotation", OFFSET(in_frot), AV_OPT_TYPE_STRING, {.str="000000"}, 0, NB_DIRECTIONS-1, FLAGS, .unit = "in_frot"},
144 { "out_frot", "output cubemap face rotation",OFFSET(out_frot), AV_OPT_TYPE_STRING, {.str="000000"}, 0, NB_DIRECTIONS-1, FLAGS, .unit = "out_frot"},
145 { "in_pad", "percent input cubemap pads", OFFSET(in_pad), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 0.1,TFLAGS, .unit = "in_pad"},
146 { "out_pad", "percent output cubemap pads", OFFSET(out_pad), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 0.1,TFLAGS, .unit = "out_pad"},
147 { "fin_pad", "fixed input cubemap pads", OFFSET(fin_pad), AV_OPT_TYPE_INT, {.i64=0}, 0, 100,TFLAGS, .unit = "fin_pad"},
148 { "fout_pad", "fixed output cubemap pads", OFFSET(fout_pad), AV_OPT_TYPE_INT, {.i64=0}, 0, 100,TFLAGS, .unit = "fout_pad"},
149 { "yaw", "yaw rotation", OFFSET(yaw), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180.f, 180.f,TFLAGS, .unit = "yaw"},
150 { "pitch", "pitch rotation", OFFSET(pitch), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180.f, 180.f,TFLAGS, .unit = "pitch"},
151 { "roll", "roll rotation", OFFSET(roll), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180.f, 180.f,TFLAGS, .unit = "roll"},
152 { "rorder", "rotation order", OFFSET(rorder), AV_OPT_TYPE_STRING, {.str="ypr"}, 0, 0,TFLAGS, .unit = "rorder"},
153 { "h_fov", "output horizontal field of view",OFFSET(h_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 360.f,TFLAGS, .unit = "h_fov"},
154 { "v_fov", "output vertical field of view", OFFSET(v_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 360.f,TFLAGS, .unit = "v_fov"},
155 { "d_fov", "output diagonal field of view", OFFSET(d_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 360.f,TFLAGS, .unit = "d_fov"},
156 { "h_flip", "flip out video horizontally", OFFSET(h_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1,TFLAGS, .unit = "h_flip"},
157 { "v_flip", "flip out video vertically", OFFSET(v_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1,TFLAGS, .unit = "v_flip"},
158 { "d_flip", "flip out video indepth", OFFSET(d_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1,TFLAGS, .unit = "d_flip"},
159 { "ih_flip", "flip in video horizontally", OFFSET(ih_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1,TFLAGS, .unit = "ih_flip"},
160 { "iv_flip", "flip in video vertically", OFFSET(iv_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1,TFLAGS, .unit = "iv_flip"},
161 { "in_trans", "transpose video input", OFFSET(in_transpose), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, .unit = "in_transpose"},
162 { "out_trans", "transpose video output", OFFSET(out_transpose), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, .unit = "out_transpose"},
163 { "ih_fov", "input horizontal field of view",OFFSET(ih_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 360.f,TFLAGS, .unit = "ih_fov"},
164 { "iv_fov", "input vertical field of view", OFFSET(iv_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 360.f,TFLAGS, .unit = "iv_fov"},
165 { "id_fov", "input diagonal field of view", OFFSET(id_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 360.f,TFLAGS, .unit = "id_fov"},
166 { "h_offset", "output horizontal off-axis offset",OFFSET(h_offset), AV_OPT_TYPE_FLOAT,{.dbl=0.f}, -1.f, 1.f,TFLAGS, .unit = "h_offset"},
167 { "v_offset", "output vertical off-axis offset", OFFSET(v_offset), AV_OPT_TYPE_FLOAT,{.dbl=0.f}, -1.f, 1.f,TFLAGS, .unit = "v_offset"},
168 {"alpha_mask", "build mask in alpha plane", OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, .unit = "alpha"},
169 { "reset_rot", "reset rotation", OFFSET(reset_rot), AV_OPT_TYPE_BOOL, {.i64=0}, -1, 1,TFLAGS, .unit = "reset_rot"},
170 { NULL }
171};
172
173AVFILTER_DEFINE_CLASS(v360);
174
175static int query_formats(const AVFilterContext *ctx,
176 AVFilterFormatsConfig **cfg_in,
177 AVFilterFormatsConfig **cfg_out)
178{
179 const V360Context *s = ctx->priv;
180 static const enum AVPixelFormat pix_fmts[] = {
181 // YUVA444
182 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P9,
183 AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12,
184 AV_PIX_FMT_YUVA444P16,
185
186 // YUVA422
187 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA422P9,
188 AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12,
189 AV_PIX_FMT_YUVA422P16,
190
191 // YUVA420
192 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA420P9,
193 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
194
195 // YUVJ
196 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
197 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
198 AV_PIX_FMT_YUVJ411P,
199
200 // YUV444
201 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P9,
202 AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12,
203 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16,
204
205 // YUV440
206 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV440P10,
207 AV_PIX_FMT_YUV440P12,
208
209 // YUV422
210 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P9,
211 AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12,
212 AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV422P16,
213
214 // YUV420
215 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P9,
216 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12,
217 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV420P16,
218
219 // YUV411
220 AV_PIX_FMT_YUV411P,
221
222 // YUV410
223 AV_PIX_FMT_YUV410P,
224
225 // GBR
226 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9,
227 AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
228 AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
229
230 // GBRA
231 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10,
232 AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
233
234 // GRAY
235 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
236 AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12,
237 AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
238
239 AV_PIX_FMT_NONE
240 };
241 static const enum AVPixelFormat alpha_pix_fmts[] = {
242 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P9,
243 AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12,
244 AV_PIX_FMT_YUVA444P16,
245 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA422P9,
246 AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12,
247 AV_PIX_FMT_YUVA422P16,
248 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA420P9,
249 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
250 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10,
251 AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
252 AV_PIX_FMT_NONE
253 };
254
255 return ff_set_pixel_formats_from_list2(ctx, cfg_in, cfg_out,
256 s->alpha ? alpha_pix_fmts : pix_fmts);
257}
258
259#define DEFINE_REMAP1_LINE(bits, div) \
260static void remap1_##bits##bit_line_c(uint8_t *dst, int width, const uint8_t *const src, \
261 ptrdiff_t in_linesize, \
262 const int16_t *const u, const int16_t *const v, \
263 const int16_t *const ker) \
264{ \
265 const uint##bits##_t *const s = (const uint##bits##_t *const)src; \
266 uint##bits##_t *d = (uint##bits##_t *)dst; \
267 \
268 in_linesize /= div; \
269 \
270 for (int x = 0; x < width; x++) \
271 d[x] = s[v[x] * in_linesize + u[x]]; \
272}
273
274DEFINE_REMAP1_LINE( 8, 1)
275DEFINE_REMAP1_LINE(16, 2)
276
277/**
278 * Generate remapping function with a given window size and pixel depth.
279 *
280 * @param ws size of interpolation window
281 * @param bits number of bits per pixel
282 */
283#define DEFINE_REMAP(ws, bits) \
284static int remap##ws##_##bits##bit_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
285{ \
286 ThreadData *td = arg; \
287 const V360Context *s = ctx->priv; \
288 const SliceXYRemap *r = &s->slice_remap[jobnr]; \
289 const AVFrame *in = td->in; \
290 AVFrame *out = td->out; \
291 \
292 av_assert1(s->nb_planes <= AV_VIDEO_MAX_PLANES); \
293 \
294 for (int stereo = 0; stereo < 1 + (s->out_stereo > STEREO_2D); stereo++) { \
295 for (int plane = 0; plane < s->nb_planes; plane++) { \
296 const unsigned map = s->map[plane]; \
297 const int in_linesize = in->linesize[plane]; \
298 const int out_linesize = out->linesize[plane]; \
299 const int uv_linesize = s->uv_linesize[plane]; \
300 const int in_offset_w = stereo ? s->in_offset_w[plane] : 0; \
301 const int in_offset_h = stereo ? s->in_offset_h[plane] : 0; \
302 const int out_offset_w = stereo ? s->out_offset_w[plane] : 0; \
303 const int out_offset_h = stereo ? s->out_offset_h[plane] : 0; \
304 const uint8_t *const src = in->data[plane] + \
305 in_offset_h * in_linesize + in_offset_w * (bits >> 3); \
306 uint8_t *dst = out->data[plane] + out_offset_h * out_linesize + out_offset_w * (bits >> 3); \
307 const uint8_t *mask = plane == 3 ? r->mask : NULL; \
308 const int width = s->pr_width[plane]; \
309 const int height = s->pr_height[plane]; \
310 \
311 const int slice_start = ff_slice_pos(height, jobnr, nb_jobs); \
312 const int slice_end = ff_slice_pos(height, jobnr + 1, nb_jobs); \
313 \
314 for (int y = slice_start; y < slice_end && !mask; y++) { \
315 const int16_t *const u = r->u[map] + (y - slice_start) * (int64_t)uv_linesize * ws * ws; \
316 const int16_t *const v = r->v[map] + (y - slice_start) * (int64_t)uv_linesize * ws * ws; \
317 const int16_t *const ker = r->ker[map] + (y - slice_start) * (int64_t)uv_linesize * ws * ws;\
318 \
319 s->remap_line(dst + y * out_linesize, width, src, in_linesize, u, v, ker); \
320 } \
321 \
322 for (int y = slice_start; y < slice_end && mask; y++) { \
323 memcpy(dst + y * out_linesize, mask + \
324 (y - slice_start) * width * (bits >> 3), width * (bits >> 3)); \
325 } \
326 } \
327 } \
328 \
329 return 0; \
330}
331
332DEFINE_REMAP(1, 8)
333DEFINE_REMAP(2, 8)
334DEFINE_REMAP(3, 8)
335DEFINE_REMAP(4, 8)
336DEFINE_REMAP(1, 16)
337DEFINE_REMAP(2, 16)
338DEFINE_REMAP(3, 16)
339DEFINE_REMAP(4, 16)
340
341#define DEFINE_REMAP_LINE(ws, bits, div) \
342static void remap##ws##_##bits##bit_line_c(uint8_t *dst, int width, const uint8_t *const src, \
343 ptrdiff_t in_linesize, \
344 const int16_t *const u, const int16_t *const v, \
345 const int16_t *const ker) \
346{ \
347 const uint##bits##_t *const s = (const uint##bits##_t *const)src; \
348 uint##bits##_t *d = (uint##bits##_t *)dst; \
349 \
350 in_linesize /= div; \
351 \
352 for (int x = 0; x < width; x++) { \
353 const int16_t *const uu = u + x * ws * ws; \
354 const int16_t *const vv = v + x * ws * ws; \
355 const int16_t *const kker = ker + x * ws * ws; \
356 int tmp = 0; \
357 \
358 for (int i = 0; i < ws; i++) { \
359 const int iws = i * ws; \
360 for (int j = 0; j < ws; j++) { \
361 tmp += kker[iws + j] * s[vv[iws + j] * in_linesize + uu[iws + j]]; \
362 } \
363 } \
364 \
365 d[x] = av_clip_uint##bits(tmp >> 14); \
366 } \
367}
368
369DEFINE_REMAP_LINE(2, 8, 1)
370DEFINE_REMAP_LINE(3, 8, 1)
371DEFINE_REMAP_LINE(4, 8, 1)
372DEFINE_REMAP_LINE(2, 16, 2)
373DEFINE_REMAP_LINE(3, 16, 2)
374DEFINE_REMAP_LINE(4, 16, 2)
375
376void ff_v360_init(V360Context *s, int depth)
377{
378 switch (s->interp) {
379 case NEAREST:
380 s->remap_line = depth <= 8 ? remap1_8bit_line_c : remap1_16bit_line_c;
381 break;
382 case BILINEAR:
383 s->remap_line = depth <= 8 ? remap2_8bit_line_c : remap2_16bit_line_c;
384 break;
385 case LAGRANGE9:
386 s->remap_line = depth <= 8 ? remap3_8bit_line_c : remap3_16bit_line_c;
387 break;
388 case BICUBIC:
389 case LANCZOS:
390 case SPLINE16:
391 case GAUSSIAN:
392 case MITCHELL:
393 s->remap_line = depth <= 8 ? remap4_8bit_line_c : remap4_16bit_line_c;
394 break;
395 }
396
397#if ARCH_X86 && HAVE_X86ASM
398 ff_v360_init_x86(s, depth);
399#endif
400}
401
402/**
403 * Save nearest pixel coordinates for remapping.
404 *
405 * @param du horizontal relative coordinate
406 * @param dv vertical relative coordinate
407 * @param rmap calculated 4x4 window
408 * @param u u remap data
409 * @param v v remap data
410 * @param ker ker remap data
411 */
412static void nearest_kernel(float du, float dv, const XYRemap *rmap,
413 int16_t *u, int16_t *v, int16_t *ker)
414{
415 const int i = lrintf(dv) + 1;
416 const int j = lrintf(du) + 1;
417
418 u[0] = rmap->u[i][j];
419 v[0] = rmap->v[i][j];
420}
421
422/**
423 * Calculate kernel for bilinear interpolation.
424 *
425 * @param du horizontal relative coordinate
426 * @param dv vertical relative coordinate
427 * @param rmap calculated 4x4 window
428 * @param u u remap data
429 * @param v v remap data
430 * @param ker ker remap data
431 */
432static void bilinear_kernel(float du, float dv, const XYRemap *rmap,
433 int16_t *u, int16_t *v, int16_t *ker)
434{
435 for (int i = 0; i < 2; i++) {
436 for (int j = 0; j < 2; j++) {
437 u[i * 2 + j] = rmap->u[i + 1][j + 1];
438 v[i * 2 + j] = rmap->v[i + 1][j + 1];
439 }
440 }
441
442 ker[0] = lrintf((1.f - du) * (1.f - dv) * 16385.f);
443 ker[1] = lrintf( du * (1.f - dv) * 16385.f);
444 ker[2] = lrintf((1.f - du) * dv * 16385.f);
445 ker[3] = lrintf( du * dv * 16385.f);
446}
447
448/**
449 * Calculate 1-dimensional lagrange coefficients.
450 *
451 * @param t relative coordinate
452 * @param coeffs coefficients
453 */
454static inline void calculate_lagrange_coeffs(float t, float *coeffs)
455{
456 coeffs[0] = (t - 1.f) * (t - 2.f) * 0.5f;
457 coeffs[1] = -t * (t - 2.f);
458 coeffs[2] = t * (t - 1.f) * 0.5f;
459}
460
461/**
462 * Calculate kernel for lagrange interpolation.
463 *
464 * @param du horizontal relative coordinate
465 * @param dv vertical relative coordinate
466 * @param rmap calculated 4x4 window
467 * @param u u remap data
468 * @param v v remap data
469 * @param ker ker remap data
470 */
471static void lagrange_kernel(float du, float dv, const XYRemap *rmap,
472 int16_t *u, int16_t *v, int16_t *ker)
473{
474 float du_coeffs[3];
475 float dv_coeffs[3];
476
477 calculate_lagrange_coeffs(du, du_coeffs);
478 calculate_lagrange_coeffs(dv, dv_coeffs);
479
480 for (int i = 0; i < 3; i++) {
481 for (int j = 0; j < 3; j++) {
482 u[i * 3 + j] = rmap->u[i + 1][j + 1];
483 v[i * 3 + j] = rmap->v[i + 1][j + 1];
484 ker[i * 3 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f);
485 }
486 }
487}
488
489/**
490 * Calculate 1-dimensional cubic coefficients.
491 *
492 * @param t relative coordinate
493 * @param coeffs coefficients
494 */
495static inline void calculate_bicubic_coeffs(float t, float *coeffs)
496{
497 const float tt = t * t;
498 const float ttt = t * t * t;
499
500 coeffs[0] = - t / 3.f + tt / 2.f - ttt / 6.f;
501 coeffs[1] = 1.f - t / 2.f - tt + ttt / 2.f;
502 coeffs[2] = t + tt / 2.f - ttt / 2.f;
503 coeffs[3] = - t / 6.f + ttt / 6.f;
504}
505
506/**
507 * Calculate kernel for bicubic interpolation.
508 *
509 * @param du horizontal relative coordinate
510 * @param dv vertical relative coordinate
511 * @param rmap calculated 4x4 window
512 * @param u u remap data
513 * @param v v remap data
514 * @param ker ker remap data
515 */
516static void bicubic_kernel(float du, float dv, const XYRemap *rmap,
517 int16_t *u, int16_t *v, int16_t *ker)
518{
519 float du_coeffs[4];
520 float dv_coeffs[4];
521
522 calculate_bicubic_coeffs(du, du_coeffs);
523 calculate_bicubic_coeffs(dv, dv_coeffs);
524
525 for (int i = 0; i < 4; i++) {
526 for (int j = 0; j < 4; j++) {
527 u[i * 4 + j] = rmap->u[i][j];
528 v[i * 4 + j] = rmap->v[i][j];
529 ker[i * 4 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f);
530 }
531 }
532}
533
534/**
535 * Calculate 1-dimensional lanczos coefficients.
536 *
537 * @param t relative coordinate
538 * @param coeffs coefficients
539 */
540static inline void calculate_lanczos_coeffs(float t, float *coeffs)
541{
542 float sum = 0.f;
543
544 for (int i = 0; i < 4; i++) {
545 const float x = M_PI * (t - i + 1);
546 if (x == 0.f) {
547 coeffs[i] = 1.f;
548 } else {
549 coeffs[i] = sinf(x) * sinf(x / 2.f) / (x * x / 2.f);
550 }
551 sum += coeffs[i];
552 }
553
554 for (int i = 0; i < 4; i++) {
555 coeffs[i] /= sum;
556 }
557}
558
559/**
560 * Calculate kernel for lanczos interpolation.
561 *
562 * @param du horizontal relative coordinate
563 * @param dv vertical relative coordinate
564 * @param rmap calculated 4x4 window
565 * @param u u remap data
566 * @param v v remap data
567 * @param ker ker remap data
568 */
569static void lanczos_kernel(float du, float dv, const XYRemap *rmap,
570 int16_t *u, int16_t *v, int16_t *ker)
571{
572 float du_coeffs[4];
573 float dv_coeffs[4];
574
575 calculate_lanczos_coeffs(du, du_coeffs);
576 calculate_lanczos_coeffs(dv, dv_coeffs);
577
578 for (int i = 0; i < 4; i++) {
579 for (int j = 0; j < 4; j++) {
580 u[i * 4 + j] = rmap->u[i][j];
581 v[i * 4 + j] = rmap->v[i][j];
582 ker[i * 4 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f);
583 }
584 }
585}
586
587/**
588 * Calculate 1-dimensional spline16 coefficients.
589 *
590 * @param t relative coordinate
591 * @param coeffs coefficients
592 */
593static void calculate_spline16_coeffs(float t, float *coeffs)
594{
595 coeffs[0] = ((-1.f / 3.f * t + 0.8f) * t - 7.f / 15.f) * t;
596 coeffs[1] = ((t - 9.f / 5.f) * t - 0.2f) * t + 1.f;
597 coeffs[2] = ((6.f / 5.f - t) * t + 0.8f) * t;
598 coeffs[3] = ((1.f / 3.f * t - 0.2f) * t - 2.f / 15.f) * t;
599}
600
601/**
602 * Calculate kernel for spline16 interpolation.
603 *
604 * @param du horizontal relative coordinate
605 * @param dv vertical relative coordinate
606 * @param rmap calculated 4x4 window
607 * @param u u remap data
608 * @param v v remap data
609 * @param ker ker remap data
610 */
611static void spline16_kernel(float du, float dv, const XYRemap *rmap,
612 int16_t *u, int16_t *v, int16_t *ker)
613{
614 float du_coeffs[4];
615 float dv_coeffs[4];
616
617 calculate_spline16_coeffs(du, du_coeffs);
618 calculate_spline16_coeffs(dv, dv_coeffs);
619
620 for (int i = 0; i < 4; i++) {
621 for (int j = 0; j < 4; j++) {
622 u[i * 4 + j] = rmap->u[i][j];
623 v[i * 4 + j] = rmap->v[i][j];
624 ker[i * 4 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f);
625 }
626 }
627}
628
629/**
630 * Calculate 1-dimensional gaussian coefficients.
631 *
632 * @param t relative coordinate
633 * @param coeffs coefficients
634 */
635static void calculate_gaussian_coeffs(float t, float *coeffs)
636{
637 float sum = 0.f;
638
639 for (int i = 0; i < 4; i++) {
640 const float x = t - (i - 1);
641 if (x == 0.f) {
642 coeffs[i] = 1.f;
643 } else {
644 coeffs[i] = expf(-2.f * x * x) * expf(-x * x / 2.f);
645 }
646 sum += coeffs[i];
647 }
648
649 for (int i = 0; i < 4; i++) {
650 coeffs[i] /= sum;
651 }
652}
653
654/**
655 * Calculate kernel for gaussian interpolation.
656 *
657 * @param du horizontal relative coordinate
658 * @param dv vertical relative coordinate
659 * @param rmap calculated 4x4 window
660 * @param u u remap data
661 * @param v v remap data
662 * @param ker ker remap data
663 */
664static void gaussian_kernel(float du, float dv, const XYRemap *rmap,
665 int16_t *u, int16_t *v, int16_t *ker)
666{
667 float du_coeffs[4];
668 float dv_coeffs[4];
669
670 calculate_gaussian_coeffs(du, du_coeffs);
671 calculate_gaussian_coeffs(dv, dv_coeffs);
672
673 for (int i = 0; i < 4; i++) {
674 for (int j = 0; j < 4; j++) {
675 u[i * 4 + j] = rmap->u[i][j];
676 v[i * 4 + j] = rmap->v[i][j];
677 ker[i * 4 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f);
678 }
679 }
680}
681
682/**
683 * Calculate 1-dimensional cubic_bc_spline coefficients.
684 *
685 * @param t relative coordinate
686 * @param coeffs coefficients
687 */
688static void calculate_cubic_bc_coeffs(float t, float *coeffs,
689 float b, float c)
690{
691 float sum = 0.f;
692 float p0 = (6.f - 2.f * b) / 6.f,
693 p2 = (-18.f + 12.f * b + 6.f * c) / 6.f,
694 p3 = (12.f - 9.f * b - 6.f * c) / 6.f,
695 q0 = (8.f * b + 24.f * c) / 6.f,
696 q1 = (-12.f * b - 48.f * c) / 6.f,
697 q2 = (6.f * b + 30.f * c) / 6.f,
698 q3 = (-b - 6.f * c) / 6.f;
699
700 for (int i = 0; i < 4; i++) {
701 const float x = fabsf(t - i + 1.f);
702 if (x < 1.f) {
703 coeffs[i] = (p0 + x * x * (p2 + x * p3)) *
704 (p0 + x * x * (p2 + x * p3 / 2.f) / 4.f);
705 } else if (x < 2.f) {
706 coeffs[i] = (q0 + x * (q1 + x * (q2 + x * q3))) *
707 (q0 + x * (q1 + x * (q2 + x / 2.f * q3) / 2.f) / 2.f);
708 } else {
709 coeffs[i] = 0.f;
710 }
711 sum += coeffs[i];
712 }
713
714 for (int i = 0; i < 4; i++) {
715 coeffs[i] /= sum;
716 }
717}
718
719/**
720 * Calculate kernel for mitchell interpolation.
721 *
722 * @param du horizontal relative coordinate
723 * @param dv vertical relative coordinate
724 * @param rmap calculated 4x4 window
725 * @param u u remap data
726 * @param v v remap data
727 * @param ker ker remap data
728 */
729static void mitchell_kernel(float du, float dv, const XYRemap *rmap,
730 int16_t *u, int16_t *v, int16_t *ker)
731{
732 float du_coeffs[4];
733 float dv_coeffs[4];
734
735 calculate_cubic_bc_coeffs(du, du_coeffs, 1.f / 3.f, 1.f / 3.f);
736 calculate_cubic_bc_coeffs(dv, dv_coeffs, 1.f / 3.f, 1.f / 3.f);
737
738 for (int i = 0; i < 4; i++) {
739 for (int j = 0; j < 4; j++) {
740 u[i * 4 + j] = rmap->u[i][j];
741 v[i * 4 + j] = rmap->v[i][j];
742 ker[i * 4 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f);
743 }
744 }
745}
746
747/**
748 * Modulo operation with only positive remainders.
749 *
750 * @param a dividend
751 * @param b divisor
752 *
753 * @return positive remainder of (a / b)
754 */
755static inline int mod(int a, int b)
756{
757 const int res = a % b;
758 if (res < 0) {
759 return res + b;
760 } else {
761 return res;
762 }
763}
764
765/**
766 * Reflect y operation.
767 *
768 * @param y input vertical position
769 * @param h input height
770 */
771static inline int reflecty(int y, int h)
772{
773 if (y < 0) {
774 y = -y;
775 } else if (y >= h) {
776 y = 2 * h - 1 - y;
777 }
778
779 return av_clip(y, 0, h - 1);
780}
781
782/**
783 * Reflect x operation for equirect.
784 *
785 * @param x input horizontal position
786 * @param y input vertical position
787 * @param w input width
788 * @param h input height
789 */
790static inline int ereflectx(int x, int y, int w, int h)
791{
792 if (y < 0 || y >= h)
793 x += w / 2;
794
795 return mod(x, w);
796}
797
798/**
799 * Reflect x operation.
800 *
801 * @param x input horizontal position
802 * @param y input vertical position
803 * @param w input width
804 * @param h input height
805 */
806static inline int reflectx(int x, int y, int w, int h)
807{
808 if (y < 0 || y >= h)
809 return av_clip(w - 1 - x, 0, w - 1);
810
811 return mod(x, w);
812}
813
814/**
815 * Convert char to corresponding direction.
816 * Used for cubemap options.
817 */
818static int get_direction(char c)
819{
820 switch (c) {
821 case 'r':
822 return RIGHT;
823 case 'l':
824 return LEFT;
825 case 'u':
826 return UP;
827 case 'd':
828 return DOWN;
829 case 'f':
830 return FRONT;
831 case 'b':
832 return BACK;
833 default:
834 return -1;
835 }
836}
837
838/**
839 * Convert char to corresponding rotation angle.
840 * Used for cubemap options.
841 */
842static int get_rotation(char c)
843{
844 switch (c) {
845 case '0':
846 return ROT_0;
847 case '1':
848 return ROT_90;
849 case '2':
850 return ROT_180;
851 case '3':
852 return ROT_270;
853 default:
854 return -1;
855 }
856}
857
858/**
859 * Convert char to corresponding rotation order.
860 */
861static int get_rorder(char c)
862{
863 switch (c) {
864 case 'Y':
865 case 'y':
866 return YAW;
867 case 'P':
868 case 'p':
869 return PITCH;
870 case 'R':
871 case 'r':
872 return ROLL;
873 default:
874 return -1;
875 }
876}
877
878/**
879 * Prepare data for processing cubemap input format.
880 *
881 * @param ctx filter context
882 *
883 * @return error code
884 */
885static int prepare_cube_in(AVFilterContext *ctx)
886{
887 V360Context *s = ctx->priv;
888
889 for (int face = 0; face < NB_FACES; face++) {
890 const char c = s->in_forder[face];
891 int direction;
892
893 if (c == '\0') {
894 av_log(ctx, AV_LOG_ERROR,
895 "Incomplete in_forder option. Direction for all 6 faces should be specified.\n");
896 return AVERROR(EINVAL);
897 }
898
899 direction = get_direction(c);
900 if (direction == -1) {
901 av_log(ctx, AV_LOG_ERROR,
902 "Incorrect direction symbol '%c' in in_forder option.\n", c);
903 return AVERROR(EINVAL);
904 }
905
906 s->in_cubemap_face_order[direction] = face;
907 }
908
909 for (int face = 0; face < NB_FACES; face++) {
910 const char c = s->in_frot[face];
911 int rotation;
912
913 if (c == '\0') {
914 av_log(ctx, AV_LOG_ERROR,
915 "Incomplete in_frot option. Rotation for all 6 faces should be specified.\n");
916 return AVERROR(EINVAL);
917 }
918
919 rotation = get_rotation(c);
920 if (rotation == -1) {
921 av_log(ctx, AV_LOG_ERROR,
922 "Incorrect rotation symbol '%c' in in_frot option.\n", c);
923 return AVERROR(EINVAL);
924 }
925
926 s->in_cubemap_face_rotation[face] = rotation;
927 }
928
929 return 0;
930}
931
932/**
933 * Prepare data for processing cubemap output format.
934 *
935 * @param ctx filter context
936 *
937 * @return error code
938 */
939static int prepare_cube_out(AVFilterContext *ctx)
940{
941 V360Context *s = ctx->priv;
942
943 for (int face = 0; face < NB_FACES; face++) {
944 const char c = s->out_forder[face];
945 int direction;
946
947 if (c == '\0') {
948 av_log(ctx, AV_LOG_ERROR,
949 "Incomplete out_forder option. Direction for all 6 faces should be specified.\n");
950 return AVERROR(EINVAL);
951 }
952
953 direction = get_direction(c);
954 if (direction == -1) {
955 av_log(ctx, AV_LOG_ERROR,
956 "Incorrect direction symbol '%c' in out_forder option.\n", c);
957 return AVERROR(EINVAL);
958 }
959
960 s->out_cubemap_direction_order[face] = direction;
961 }
962
963 for (int face = 0; face < NB_FACES; face++) {
964 const char c = s->out_frot[face];
965 int rotation;
966
967 if (c == '\0') {
968 av_log(ctx, AV_LOG_ERROR,
969 "Incomplete out_frot option. Rotation for all 6 faces should be specified.\n");
970 return AVERROR(EINVAL);
971 }
972
973 rotation = get_rotation(c);
974 if (rotation == -1) {
975 av_log(ctx, AV_LOG_ERROR,
976 "Incorrect rotation symbol '%c' in out_frot option.\n", c);
977 return AVERROR(EINVAL);
978 }
979
980 s->out_cubemap_face_rotation[face] = rotation;
981 }
982
983 return 0;
984}
985
986static inline void rotate_cube_face(float *uf, float *vf, int rotation)
987{
988 float tmp;
989
990 switch (rotation) {
991 case ROT_0:
992 break;
993 case ROT_90:
994 tmp = *uf;
995 *uf = -*vf;
996 *vf = tmp;
997 break;
998 case ROT_180:
999 *uf = -*uf;
1000 *vf = -*vf;
1001 break;
1002 case ROT_270:
1003 tmp = -*uf;
1004 *uf = *vf;
1005 *vf = tmp;
1006 break;
1007 default:
1008 av_assert0(0);
1009 }
1010}
1011
1012static inline void rotate_cube_face_inverse(float *uf, float *vf, int rotation)
1013{
1014 float tmp;
1015
1016 switch (rotation) {
1017 case ROT_0:
1018 break;
1019 case ROT_90:
1020 tmp = -*uf;
1021 *uf = *vf;
1022 *vf = tmp;
1023 break;
1024 case ROT_180:
1025 *uf = -*uf;
1026 *vf = -*vf;
1027 break;
1028 case ROT_270:
1029 tmp = *uf;
1030 *uf = -*vf;
1031 *vf = tmp;
1032 break;
1033 default:
1034 av_assert0(0);
1035 }
1036}
1037
1038/**
1039 * Offset vector.
1040 *
1041 * @param vec vector
1042 */
1043static void offset_vector(float *vec, float h_offset, float v_offset)
1044{
1045 vec[0] += h_offset;
1046 vec[1] += v_offset;
1047}
1048
1049/**
1050 * Normalize vector.
1051 *
1052 * @param vec vector
1053 */
1054static void normalize_vector(float *vec)
1055{
1056 const float norm = sqrtf(vec[0] * vec[0] + vec[1] * vec[1] + vec[2] * vec[2]);
1057
1058 vec[0] /= norm;
1059 vec[1] /= norm;
1060 vec[2] /= norm;
1061}
1062
1063/**
1064 * Calculate 3D coordinates on sphere for corresponding cubemap position.
1065 * Common operation for every cubemap.
1066 *
1067 * @param s filter private context
1068 * @param uf horizontal cubemap coordinate [0, 1)
1069 * @param vf vertical cubemap coordinate [0, 1)
1070 * @param face face of cubemap
1071 * @param vec coordinates on sphere
1072 * @param scalew scale for uf
1073 * @param scaleh scale for vf
1074 */
1075static void cube_to_xyz(const V360Context *s,
1076 float uf, float vf, int face,
1077 float *vec, float scalew, float scaleh)
1078{
1079 const int direction = s->out_cubemap_direction_order[face];
1080 float l_x, l_y, l_z;
1081
1082 uf /= scalew;
1083 vf /= scaleh;
1084
1085 rotate_cube_face_inverse(&uf, &vf, s->out_cubemap_face_rotation[face]);
1086
1087 switch (direction) {
1088 case RIGHT:
1089 l_x = 1.f;
1090 l_y = vf;
1091 l_z = -uf;
1092 break;
1093 case LEFT:
1094 l_x = -1.f;
1095 l_y = vf;
1096 l_z = uf;
1097 break;
1098 case UP:
1099 l_x = uf;
1100 l_y = -1.f;
1101 l_z = vf;
1102 break;
1103 case DOWN:
1104 l_x = uf;
1105 l_y = 1.f;
1106 l_z = -vf;
1107 break;
1108 case FRONT:
1109 l_x = uf;
1110 l_y = vf;
1111 l_z = 1.f;
1112 break;
1113 case BACK:
1114 l_x = -uf;
1115 l_y = vf;
1116 l_z = -1.f;
1117 break;
1118 default:
1119 av_assert0(0);
1120 }
1121
1122 vec[0] = l_x;
1123 vec[1] = l_y;
1124 vec[2] = l_z;
1125}
1126
1127/**
1128 * Calculate cubemap position for corresponding 3D coordinates on sphere.
1129 * Common operation for every cubemap.
1130 *
1131 * @param s filter private context
1132 * @param vec coordinated on sphere
1133 * @param uf horizontal cubemap coordinate [0, 1)
1134 * @param vf vertical cubemap coordinate [0, 1)
1135 * @param direction direction of view
1136 */
1137static void xyz_to_cube(const V360Context *s,
1138 const float *vec,
1139 float *uf, float *vf, int *direction)
1140{
1141 const float phi = atan2f(vec[0], vec[2]);
1142 const float theta = asinf(vec[1]);
1143 float phi_norm, theta_threshold;
1144 int face;
1145
1146 if (phi >= -M_PI_4 && phi < M_PI_4) {
1147 *direction = FRONT;
1148 phi_norm = phi;
1149 } else if (phi >= -(M_PI_2 + M_PI_4) && phi < -M_PI_4) {
1150 *direction = LEFT;
1151 phi_norm = phi + M_PI_2;
1152 } else if (phi >= M_PI_4 && phi < M_PI_2 + M_PI_4) {
1153 *direction = RIGHT;
1154 phi_norm = phi - M_PI_2;
1155 } else {
1156 *direction = BACK;
1157 phi_norm = phi + ((phi > 0.f) ? -M_PI : M_PI);
1158 }
1159
1160 theta_threshold = atanf(cosf(phi_norm));
1161 if (theta > theta_threshold) {
1162 *direction = DOWN;
1163 } else if (theta < -theta_threshold) {
1164 *direction = UP;
1165 }
1166
1167 switch (*direction) {
1168 case RIGHT:
1169 *uf = -vec[2] / vec[0];
1170 *vf = vec[1] / vec[0];
1171 break;
1172 case LEFT:
1173 *uf = -vec[2] / vec[0];
1174 *vf = -vec[1] / vec[0];
1175 break;
1176 case UP:
1177 *uf = -vec[0] / vec[1];
1178 *vf = -vec[2] / vec[1];
1179 break;
1180 case DOWN:
1181 *uf = vec[0] / vec[1];
1182 *vf = -vec[2] / vec[1];
1183 break;
1184 case FRONT:
1185 *uf = vec[0] / vec[2];
1186 *vf = vec[1] / vec[2];
1187 break;
1188 case BACK:
1189 *uf = vec[0] / vec[2];
1190 *vf = -vec[1] / vec[2];
1191 break;
1192 default:
1193 av_assert0(0);
1194 }
1195
1196 face = s->in_cubemap_face_order[*direction];
1197 rotate_cube_face(uf, vf, s->in_cubemap_face_rotation[face]);
1198}
1199
1200/**
1201 * Find position on another cube face in case of overflow/underflow.
1202 * Used for calculation of interpolation window.
1203 *
1204 * @param s filter private context
1205 * @param uf horizontal cubemap coordinate
1206 * @param vf vertical cubemap coordinate
1207 * @param direction direction of view
1208 * @param new_uf new horizontal cubemap coordinate
1209 * @param new_vf new vertical cubemap coordinate
1210 * @param face face position on cubemap
1211 */
1212static void process_cube_coordinates(const V360Context *s,
1213 float uf, float vf, int direction,
1214 float *new_uf, float *new_vf, int *face)
1215{
1216 /*
1217 * Cubemap orientation
1218 *
1219 * width
1220 * <------->
1221 * +-------+
1222 * | | U
1223 * | up | h ------->
1224 * +-------+-------+-------+-------+ ^ e |
1225 * | | | | | | i V |
1226 * | left | front | right | back | | g |
1227 * +-------+-------+-------+-------+ v h v
1228 * | | t
1229 * | down |
1230 * +-------+
1231 */
1232
1233 *face = s->in_cubemap_face_order[direction];
1234 rotate_cube_face_inverse(&uf, &vf, s->in_cubemap_face_rotation[*face]);
1235
1236 if ((uf < -1.f || uf >= 1.f) && (vf < -1.f || vf >= 1.f)) {
1237 // There are no pixels to use in this case
1238 *new_uf = uf;
1239 *new_vf = vf;
1240 } else if (uf < -1.f) {
1241 uf += 2.f;
1242 switch (direction) {
1243 case RIGHT:
1244 direction = FRONT;
1245 *new_uf = uf;
1246 *new_vf = vf;
1247 break;
1248 case LEFT:
1249 direction = BACK;
1250 *new_uf = uf;
1251 *new_vf = vf;
1252 break;
1253 case UP:
1254 direction = LEFT;
1255 *new_uf = vf;
1256 *new_vf = -uf;
1257 break;
1258 case DOWN:
1259 direction = LEFT;
1260 *new_uf = -vf;
1261 *new_vf = uf;
1262 break;
1263 case FRONT:
1264 direction = LEFT;
1265 *new_uf = uf;
1266 *new_vf = vf;
1267 break;
1268 case BACK:
1269 direction = RIGHT;
1270 *new_uf = uf;
1271 *new_vf = vf;
1272 break;
1273 default:
1274 av_assert0(0);
1275 }
1276 } else if (uf >= 1.f) {
1277 uf -= 2.f;
1278 switch (direction) {
1279 case RIGHT:
1280 direction = BACK;
1281 *new_uf = uf;
1282 *new_vf = vf;
1283 break;
1284 case LEFT:
1285 direction = FRONT;
1286 *new_uf = uf;
1287 *new_vf = vf;
1288 break;
1289 case UP:
1290 direction = RIGHT;
1291 *new_uf = -vf;
1292 *new_vf = uf;
1293 break;
1294 case DOWN:
1295 direction = RIGHT;
1296 *new_uf = vf;
1297 *new_vf = -uf;
1298 break;
1299 case FRONT:
1300 direction = RIGHT;
1301 *new_uf = uf;
1302 *new_vf = vf;
1303 break;
1304 case BACK:
1305 direction = LEFT;
1306 *new_uf = uf;
1307 *new_vf = vf;
1308 break;
1309 default:
1310 av_assert0(0);
1311 }
1312 } else if (vf < -1.f) {
1313 vf += 2.f;
1314 switch (direction) {
1315 case RIGHT:
1316 direction = UP;
1317 *new_uf = vf;
1318 *new_vf = -uf;
1319 break;
1320 case LEFT:
1321 direction = UP;
1322 *new_uf = -vf;
1323 *new_vf = uf;
1324 break;
1325 case UP:
1326 direction = BACK;
1327 *new_uf = -uf;
1328 *new_vf = -vf;
1329 break;
1330 case DOWN:
1331 direction = FRONT;
1332 *new_uf = uf;
1333 *new_vf = vf;
1334 break;
1335 case FRONT:
1336 direction = UP;
1337 *new_uf = uf;
1338 *new_vf = vf;
1339 break;
1340 case BACK:
1341 direction = UP;
1342 *new_uf = -uf;
1343 *new_vf = -vf;
1344 break;
1345 default:
1346 av_assert0(0);
1347 }
1348 } else if (vf >= 1.f) {
1349 vf -= 2.f;
1350 switch (direction) {
1351 case RIGHT:
1352 direction = DOWN;
1353 *new_uf = -vf;
1354 *new_vf = uf;
1355 break;
1356 case LEFT:
1357 direction = DOWN;
1358 *new_uf = vf;
1359 *new_vf = -uf;
1360 break;
1361 case UP:
1362 direction = FRONT;
1363 *new_uf = uf;
1364 *new_vf = vf;
1365 break;
1366 case DOWN:
1367 direction = BACK;
1368 *new_uf = -uf;
1369 *new_vf = -vf;
1370 break;
1371 case FRONT:
1372 direction = DOWN;
1373 *new_uf = uf;
1374 *new_vf = vf;
1375 break;
1376 case BACK:
1377 direction = DOWN;
1378 *new_uf = -uf;
1379 *new_vf = -vf;
1380 break;
1381 default:
1382 av_assert0(0);
1383 }
1384 } else {
1385 // Inside cube face
1386 *new_uf = uf;
1387 *new_vf = vf;
1388 }
1389
1390 *face = s->in_cubemap_face_order[direction];
1391 rotate_cube_face(new_uf, new_vf, s->in_cubemap_face_rotation[*face]);
1392}
1393
1394static av_always_inline float scale(float x, float s)
1395{
1396 return (0.5f * x + 0.5f) * (s - 1.f);
1397}
1398
1399static av_always_inline float rescale(int x, float s)
1400{
1401 return (2.f * x + 1.f) / s - 1.f;
1402}
1403
1404/**
1405 * Calculate 3D coordinates on sphere for corresponding frame position in cubemap3x2 format.
1406 *
1407 * @param s filter private context
1408 * @param i horizontal position on frame [0, width)
1409 * @param j vertical position on frame [0, height)
1410 * @param width frame width
1411 * @param height frame height
1412 * @param vec coordinates on sphere
1413 */
1414static int cube3x2_to_xyz(const V360Context *s,
1415 int i, int j, int width, int height,
1416 float *vec)
1417{
1418 const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (width / 3.f) : 1.f - s->out_pad;
1419 const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 2.f) : 1.f - s->out_pad;
1420
1421 const float ew = width / 3.f;
1422 const float eh = height / 2.f;
1423
1424 const int u_face = floorf(i / ew);
1425 const int v_face = floorf(j / eh);
1426 const int face = u_face + 3 * v_face;
1427
1428 const int u_shift = ceilf(ew * u_face);
1429 const int v_shift = ceilf(eh * v_face);
1430 const int ewi = ceilf(ew * (u_face + 1)) - u_shift;
1431 const int ehi = ceilf(eh * (v_face + 1)) - v_shift;
1432
1433 const float uf = rescale(i - u_shift, ewi);
1434 const float vf = rescale(j - v_shift, ehi);
1435
1436 cube_to_xyz(s, uf, vf, face, vec, scalew, scaleh);
1437
1438 return 1;
1439}
1440
1441/**
1442 * Calculate frame position in cubemap3x2 format for corresponding 3D coordinates on sphere.
1443 *
1444 * @param s filter private context
1445 * @param vec coordinates on sphere
1446 * @param width frame width
1447 * @param height frame height
1448 * @param us horizontal coordinates for interpolation window
1449 * @param vs vertical coordinates for interpolation window
1450 * @param du horizontal relative coordinate
1451 * @param dv vertical relative coordinate
1452 */
1453static int xyz_to_cube3x2(const V360Context *s,
1454 const float *vec, int width, int height,
1455 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
1456{
1457 const float scalew = s->fin_pad > 0 ? 1.f - s->fin_pad / (width / 3.f) : 1.f - s->in_pad;
1458 const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (height / 2.f) : 1.f - s->in_pad;
1459 const float ew = width / 3.f;
1460 const float eh = height / 2.f;
1461 float uf, vf;
1462 int ui, vi;
1463 int ewi, ehi;
1464 int direction, face;
1465 int u_face, v_face;
1466
1467 xyz_to_cube(s, vec, &uf, &vf, &direction);
1468
1469 uf *= scalew;
1470 vf *= scaleh;
1471
1472 face = s->in_cubemap_face_order[direction];
1473 u_face = face % 3;
1474 v_face = face / 3;
1475 ewi = ceilf(ew * (u_face + 1)) - ceilf(ew * u_face);
1476 ehi = ceilf(eh * (v_face + 1)) - ceilf(eh * v_face);
1477
1478 uf = 0.5f * ewi * (uf + 1.f) - 0.5f;
1479 vf = 0.5f * ehi * (vf + 1.f) - 0.5f;
1480
1481 ui = floorf(uf);
1482 vi = floorf(vf);
1483
1484 *du = uf - ui;
1485 *dv = vf - vi;
1486
1487 for (int i = 0; i < 4; i++) {
1488 for (int j = 0; j < 4; j++) {
1489 int new_ui = ui + j - 1;
1490 int new_vi = vi + i - 1;
1491 int u_shift, v_shift;
1492 int new_ewi, new_ehi;
1493
1494 if (new_ui >= 0 && new_ui < ewi && new_vi >= 0 && new_vi < ehi) {
1495 face = s->in_cubemap_face_order[direction];
1496
1497 u_face = face % 3;
1498 v_face = face / 3;
1499 u_shift = ceilf(ew * u_face);
1500 v_shift = ceilf(eh * v_face);
1501 } else {
1502 uf = 2.f * new_ui / ewi - 1.f;
1503 vf = 2.f * new_vi / ehi - 1.f;
1504
1505 uf /= scalew;
1506 vf /= scaleh;
1507
1508 process_cube_coordinates(s, uf, vf, direction, &uf, &vf, &face);
1509
1510 uf *= scalew;
1511 vf *= scaleh;
1512
1513 u_face = face % 3;
1514 v_face = face / 3;
1515 u_shift = ceilf(ew * u_face);
1516 v_shift = ceilf(eh * v_face);
1517 new_ewi = ceilf(ew * (u_face + 1)) - u_shift;
1518 new_ehi = ceilf(eh * (v_face + 1)) - v_shift;
1519
1520 new_ui = av_clip(lrintf(0.5f * new_ewi * (uf + 1.f)), 0, new_ewi - 1);
1521 new_vi = av_clip(lrintf(0.5f * new_ehi * (vf + 1.f)), 0, new_ehi - 1);
1522 }
1523
1524 us[i][j] = u_shift + new_ui;
1525 vs[i][j] = v_shift + new_vi;
1526 }
1527 }
1528
1529 return 1;
1530}
1531
1532/**
1533 * Calculate 3D coordinates on sphere for corresponding frame position in cubemap1x6 format.
1534 *
1535 * @param s filter private context
1536 * @param i horizontal position on frame [0, width)
1537 * @param j vertical position on frame [0, height)
1538 * @param width frame width
1539 * @param height frame height
1540 * @param vec coordinates on sphere
1541 */
1542static int cube1x6_to_xyz(const V360Context *s,
1543 int i, int j, int width, int height,
1544 float *vec)
1545{
1546 const float scalew = s->fout_pad > 0 ? 1.f - (float)(s->fout_pad) / width : 1.f - s->out_pad;
1547 const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 6.f) : 1.f - s->out_pad;
1548
1549 const float ew = width;
1550 const float eh = height / 6.f;
1551
1552 const int face = floorf(j / eh);
1553
1554 const int v_shift = ceilf(eh * face);
1555 const int ehi = ceilf(eh * (face + 1)) - v_shift;
1556
1557 const float uf = rescale(i, ew);
1558 const float vf = rescale(j - v_shift, ehi);
1559
1560 cube_to_xyz(s, uf, vf, face, vec, scalew, scaleh);
1561
1562 return 1;
1563}
1564
1565/**
1566 * Calculate 3D coordinates on sphere for corresponding frame position in cubemap6x1 format.
1567 *
1568 * @param s filter private context
1569 * @param i horizontal position on frame [0, width)
1570 * @param j vertical position on frame [0, height)
1571 * @param width frame width
1572 * @param height frame height
1573 * @param vec coordinates on sphere
1574 */
1575static int cube6x1_to_xyz(const V360Context *s,
1576 int i, int j, int width, int height,
1577 float *vec)
1578{
1579 const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (width / 6.f) : 1.f - s->out_pad;
1580 const float scaleh = s->fout_pad > 0 ? 1.f - (float)(s->fout_pad) / height : 1.f - s->out_pad;
1581
1582 const float ew = width / 6.f;
1583 const float eh = height;
1584
1585 const int face = floorf(i / ew);
1586
1587 const int u_shift = ceilf(ew * face);
1588 const int ewi = ceilf(ew * (face + 1)) - u_shift;
1589
1590 const float uf = rescale(i - u_shift, ewi);
1591 const float vf = rescale(j, eh);
1592
1593 cube_to_xyz(s, uf, vf, face, vec, scalew, scaleh);
1594
1595 return 1;
1596}
1597
1598/**
1599 * Calculate frame position in cubemap1x6 format for corresponding 3D coordinates on sphere.
1600 *
1601 * @param s filter private context
1602 * @param vec coordinates on sphere
1603 * @param width frame width
1604 * @param height frame height
1605 * @param us horizontal coordinates for interpolation window
1606 * @param vs vertical coordinates for interpolation window
1607 * @param du horizontal relative coordinate
1608 * @param dv vertical relative coordinate
1609 */
1610static int xyz_to_cube1x6(const V360Context *s,
1611 const float *vec, int width, int height,
1612 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
1613{
1614 const float scalew = s->fin_pad > 0 ? 1.f - (float)(s->fin_pad) / width : 1.f - s->in_pad;
1615 const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (height / 6.f) : 1.f - s->in_pad;
1616 const float eh = height / 6.f;
1617 const int ewi = width;
1618 float uf, vf;
1619 int ui, vi;
1620 int ehi;
1621 int direction, face;
1622
1623 xyz_to_cube(s, vec, &uf, &vf, &direction);
1624
1625 uf *= scalew;
1626 vf *= scaleh;
1627
1628 face = s->in_cubemap_face_order[direction];
1629 ehi = ceilf(eh * (face + 1)) - ceilf(eh * face);
1630
1631 uf = 0.5f * ewi * (uf + 1.f) - 0.5f;
1632 vf = 0.5f * ehi * (vf + 1.f) - 0.5f;
1633
1634 ui = floorf(uf);
1635 vi = floorf(vf);
1636
1637 *du = uf - ui;
1638 *dv = vf - vi;
1639
1640 for (int i = 0; i < 4; i++) {
1641 for (int j = 0; j < 4; j++) {
1642 int new_ui = ui + j - 1;
1643 int new_vi = vi + i - 1;
1644 int v_shift;
1645 int new_ehi;
1646
1647 if (new_ui >= 0 && new_ui < ewi && new_vi >= 0 && new_vi < ehi) {
1648 face = s->in_cubemap_face_order[direction];
1649
1650 v_shift = ceilf(eh * face);
1651 } else {
1652 uf = 2.f * new_ui / ewi - 1.f;
1653 vf = 2.f * new_vi / ehi - 1.f;
1654
1655 uf /= scalew;
1656 vf /= scaleh;
1657
1658 process_cube_coordinates(s, uf, vf, direction, &uf, &vf, &face);
1659
1660 uf *= scalew;
1661 vf *= scaleh;
1662
1663 v_shift = ceilf(eh * face);
1664 new_ehi = ceilf(eh * (face + 1)) - v_shift;
1665
1666 new_ui = av_clip(lrintf(0.5f * ewi * (uf + 1.f)), 0, ewi - 1);
1667 new_vi = av_clip(lrintf(0.5f * new_ehi * (vf + 1.f)), 0, new_ehi - 1);
1668 }
1669
1670 us[i][j] = new_ui;
1671 vs[i][j] = v_shift + new_vi;
1672 }
1673 }
1674
1675 return 1;
1676}
1677
1678/**
1679 * Calculate frame position in cubemap6x1 format for corresponding 3D coordinates on sphere.
1680 *
1681 * @param s filter private context
1682 * @param vec coordinates on sphere
1683 * @param width frame width
1684 * @param height frame height
1685 * @param us horizontal coordinates for interpolation window
1686 * @param vs vertical coordinates for interpolation window
1687 * @param du horizontal relative coordinate
1688 * @param dv vertical relative coordinate
1689 */
1690static int xyz_to_cube6x1(const V360Context *s,
1691 const float *vec, int width, int height,
1692 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
1693{
1694 const float scalew = s->fin_pad > 0 ? 1.f - s->fin_pad / (width / 6.f) : 1.f - s->in_pad;
1695 const float scaleh = s->fin_pad > 0 ? 1.f - (float)(s->fin_pad) / height : 1.f - s->in_pad;
1696 const float ew = width / 6.f;
1697 const int ehi = height;
1698 float uf, vf;
1699 int ui, vi;
1700 int ewi;
1701 int direction, face;
1702
1703 xyz_to_cube(s, vec, &uf, &vf, &direction);
1704
1705 uf *= scalew;
1706 vf *= scaleh;
1707
1708 face = s->in_cubemap_face_order[direction];
1709 ewi = ceilf(ew * (face + 1)) - ceilf(ew * face);
1710
1711 uf = 0.5f * ewi * (uf + 1.f) - 0.5f;
1712 vf = 0.5f * ehi * (vf + 1.f) - 0.5f;
1713
1714 ui = floorf(uf);
1715 vi = floorf(vf);
1716
1717 *du = uf - ui;
1718 *dv = vf - vi;
1719
1720 for (int i = 0; i < 4; i++) {
1721 for (int j = 0; j < 4; j++) {
1722 int new_ui = ui + j - 1;
1723 int new_vi = vi + i - 1;
1724 int u_shift;
1725 int new_ewi;
1726
1727 if (new_ui >= 0 && new_ui < ewi && new_vi >= 0 && new_vi < ehi) {
1728 face = s->in_cubemap_face_order[direction];
1729
1730 u_shift = ceilf(ew * face);
1731 } else {
1732 uf = 2.f * new_ui / ewi - 1.f;
1733 vf = 2.f * new_vi / ehi - 1.f;
1734
1735 uf /= scalew;
1736 vf /= scaleh;
1737
1738 process_cube_coordinates(s, uf, vf, direction, &uf, &vf, &face);
1739
1740 uf *= scalew;
1741 vf *= scaleh;
1742
1743 u_shift = ceilf(ew * face);
1744 new_ewi = ceilf(ew * (face + 1)) - u_shift;
1745
1746 new_ui = av_clip(lrintf(0.5f * new_ewi * (uf + 1.f)), 0, new_ewi - 1);
1747 new_vi = av_clip(lrintf(0.5f * ehi * (vf + 1.f)), 0, ehi - 1);
1748 }
1749
1750 us[i][j] = u_shift + new_ui;
1751 vs[i][j] = new_vi;
1752 }
1753 }
1754
1755 return 1;
1756}
1757
1758/**
1759 * Prepare data for processing equirectangular output format.
1760 *
1761 * @param ctx filter context
1762 *
1763 * @return error code
1764 */
1765static int prepare_equirect_out(AVFilterContext *ctx)
1766{
1767 V360Context *s = ctx->priv;
1768
1769 s->flat_range[0] = s->h_fov * M_PI / 360.f;
1770 s->flat_range[1] = s->v_fov * M_PI / 360.f;
1771
1772 return 0;
1773}
1774
1775/**
1776 * Calculate 3D coordinates on sphere for corresponding frame position in equirectangular format.
1777 *
1778 * @param s filter private context
1779 * @param i horizontal position on frame [0, width)
1780 * @param j vertical position on frame [0, height)
1781 * @param width frame width
1782 * @param height frame height
1783 * @param vec coordinates on sphere
1784 */
1785static int equirect_to_xyz(const V360Context *s,
1786 int i, int j, int width, int height,
1787 float *vec)
1788{
1789 const float phi = rescale(i, width) * s->flat_range[0];
1790 const float theta = rescale(j, height) * s->flat_range[1];
1791
1792 const float sin_phi = sinf(phi);
1793 const float cos_phi = cosf(phi);
1794 const float sin_theta = sinf(theta);
1795 const float cos_theta = cosf(theta);
1796
1797 vec[0] = cos_theta * sin_phi;
1798 vec[1] = sin_theta;
1799 vec[2] = cos_theta * cos_phi;
1800
1801 return 1;
1802}
1803
1804/**
1805 * Calculate 3D coordinates on sphere for corresponding frame position in half equirectangular format.
1806 *
1807 * @param s filter private context
1808 * @param i horizontal position on frame [0, width)
1809 * @param j vertical position on frame [0, height)
1810 * @param width frame width
1811 * @param height frame height
1812 * @param vec coordinates on sphere
1813 */
1814static int hequirect_to_xyz(const V360Context *s,
1815 int i, int j, int width, int height,
1816 float *vec)
1817{
1818 const float phi = rescale(i, width) * M_PI_2;
1819 const float theta = rescale(j, height) * M_PI_2;
1820
1821 const float sin_phi = sinf(phi);
1822 const float cos_phi = cosf(phi);
1823 const float sin_theta = sinf(theta);
1824 const float cos_theta = cosf(theta);
1825
1826 vec[0] = cos_theta * sin_phi;
1827 vec[1] = sin_theta;
1828 vec[2] = cos_theta * cos_phi;
1829
1830 return 1;
1831}
1832
1833/**
1834 * Prepare data for processing stereographic output format.
1835 *
1836 * @param ctx filter context
1837 *
1838 * @return error code
1839 */
1840static int prepare_stereographic_out(AVFilterContext *ctx)
1841{
1842 V360Context *s = ctx->priv;
1843
1844 s->flat_range[0] = tanf(FFMIN(s->h_fov, 359.f) * M_PI / 720.f);
1845 s->flat_range[1] = tanf(FFMIN(s->v_fov, 359.f) * M_PI / 720.f);
1846
1847 return 0;
1848}
1849
1850/**
1851 * Calculate 3D coordinates on sphere for corresponding frame position in stereographic format.
1852 *
1853 * @param s filter private context
1854 * @param i horizontal position on frame [0, width)
1855 * @param j vertical position on frame [0, height)
1856 * @param width frame width
1857 * @param height frame height
1858 * @param vec coordinates on sphere
1859 */
1860static int stereographic_to_xyz(const V360Context *s,
1861 int i, int j, int width, int height,
1862 float *vec)
1863{
1864 const float x = rescale(i, width) * s->flat_range[0];
1865 const float y = rescale(j, height) * s->flat_range[1];
1866 const float r = hypotf(x, y);
1867 const float theta = atanf(r) * 2.f;
1868 const float sin_theta = sinf(theta);
1869
1870 if (r > 0.f) {
1871 vec[0] = x / r * sin_theta;
1872 vec[1] = y / r * sin_theta;
1873 vec[2] = cosf(theta);
1874 } else {
1875 vec[0] = vec[1] = 0.f;
1876 vec[2] = 1.f;
1877 }
1878
1879 return 1;
1880}
1881
1882/**
1883 * Prepare data for processing stereographic input format.
1884 *
1885 * @param ctx filter context
1886 *
1887 * @return error code
1888 */
1889static int prepare_stereographic_in(AVFilterContext *ctx)
1890{
1891 V360Context *s = ctx->priv;
1892
1893 s->iflat_range[0] = tanf(FFMIN(s->ih_fov, 359.f) * M_PI / 720.f);
1894 s->iflat_range[1] = tanf(FFMIN(s->iv_fov, 359.f) * M_PI / 720.f);
1895
1896 return 0;
1897}
1898
1899/**
1900 * Calculate frame position in stereographic format for corresponding 3D coordinates on sphere.
1901 *
1902 * @param s filter private context
1903 * @param vec coordinates on sphere
1904 * @param width frame width
1905 * @param height frame height
1906 * @param us horizontal coordinates for interpolation window
1907 * @param vs vertical coordinates for interpolation window
1908 * @param du horizontal relative coordinate
1909 * @param dv vertical relative coordinate
1910 */
1911static int xyz_to_stereographic(const V360Context *s,
1912 const float *vec, int width, int height,
1913 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
1914{
1915 const float theta = acosf(vec[2]);
1916 const float r = tanf(theta * 0.5f);
1917 const float c = r / hypotf(vec[0], vec[1]);
1918 const float x = vec[0] * c / s->iflat_range[0];
1919 const float y = vec[1] * c / s->iflat_range[1];
1920
1921 const float uf = scale(x, width);
1922 const float vf = scale(y, height);
1923
1924 const int ui = floorf(uf);
1925 const int vi = floorf(vf);
1926
1927 const int visible = isfinite(x) && isfinite(y) && vi >= 0 && vi < height && ui >= 0 && ui < width;
1928
1929 *du = visible ? uf - ui : 0.f;
1930 *dv = visible ? vf - vi : 0.f;
1931
1932 for (int i = 0; i < 4; i++) {
1933 for (int j = 0; j < 4; j++) {
1934 us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0;
1935 vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0;
1936 }
1937 }
1938
1939 return visible;
1940}
1941
1942/**
1943 * Prepare data for processing equisolid output format.
1944 *
1945 * @param ctx filter context
1946 *
1947 * @return error code
1948 */
1949static int prepare_equisolid_out(AVFilterContext *ctx)
1950{
1951 V360Context *s = ctx->priv;
1952
1953 s->flat_range[0] = sinf(s->h_fov * M_PI / 720.f);
1954 s->flat_range[1] = sinf(s->v_fov * M_PI / 720.f);
1955
1956 return 0;
1957}
1958
1959/**
1960 * Calculate 3D coordinates on sphere for corresponding frame position in equisolid format.
1961 *
1962 * @param s filter private context
1963 * @param i horizontal position on frame [0, width)
1964 * @param j vertical position on frame [0, height)
1965 * @param width frame width
1966 * @param height frame height
1967 * @param vec coordinates on sphere
1968 */
1969static int equisolid_to_xyz(const V360Context *s,
1970 int i, int j, int width, int height,
1971 float *vec)
1972{
1973 const float x = rescale(i, width) * s->flat_range[0];
1974 const float y = rescale(j, height) * s->flat_range[1];
1975 const float r = hypotf(x, y);
1976 const float theta = asinf(r) * 2.f;
1977 const float sin_theta = sinf(theta);
1978
1979 if (r > 0.f) {
1980 vec[0] = x / r * sin_theta;
1981 vec[1] = y / r * sin_theta;
1982 vec[2] = cosf(theta);
1983 } else {
1984 vec[0] = vec[1] = 0.f;
1985 vec[2] = 1.f;
1986 }
1987
1988 return 1;
1989}
1990
1991/**
1992 * Prepare data for processing equisolid input format.
1993 *
1994 * @param ctx filter context
1995 *
1996 * @return error code
1997 */
1998static int prepare_equisolid_in(AVFilterContext *ctx)
1999{
2000 V360Context *s = ctx->priv;
2001
2002 s->iflat_range[0] = sinf(FFMIN(s->ih_fov, 359.f) * M_PI / 720.f);
2003 s->iflat_range[1] = sinf(FFMIN(s->iv_fov, 359.f) * M_PI / 720.f);
2004
2005 return 0;
2006}
2007
2008/**
2009 * Calculate frame position in equisolid format for corresponding 3D coordinates on sphere.
2010 *
2011 * @param s filter private context
2012 * @param vec coordinates on sphere
2013 * @param width frame width
2014 * @param height frame height
2015 * @param us horizontal coordinates for interpolation window
2016 * @param vs vertical coordinates for interpolation window
2017 * @param du horizontal relative coordinate
2018 * @param dv vertical relative coordinate
2019 */
2020static int xyz_to_equisolid(const V360Context *s,
2021 const float *vec, int width, int height,
2022 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2023{
2024 const float theta = acosf(vec[2]);
2025 const float r = sinf(theta * 0.5f);
2026 const float c = r / hypotf(vec[0], vec[1]);
2027 const float x = vec[0] * c / s->iflat_range[0];
2028 const float y = vec[1] * c / s->iflat_range[1];
2029
2030 const float uf = scale(x, width);
2031 const float vf = scale(y, height);
2032
2033 const int ui = floorf(uf);
2034 const int vi = floorf(vf);
2035
2036 const int visible = isfinite(x) && isfinite(y) && vi >= 0 && vi < height && ui >= 0 && ui < width;
2037
2038 *du = visible ? uf - ui : 0.f;
2039 *dv = visible ? vf - vi : 0.f;
2040
2041 for (int i = 0; i < 4; i++) {
2042 for (int j = 0; j < 4; j++) {
2043 us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0;
2044 vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0;
2045 }
2046 }
2047
2048 return visible;
2049}
2050
2051/**
2052 * Prepare data for processing orthographic output format.
2053 *
2054 * @param ctx filter context
2055 *
2056 * @return error code
2057 */
2058static int prepare_orthographic_out(AVFilterContext *ctx)
2059{
2060 V360Context *s = ctx->priv;
2061
2062 s->flat_range[0] = sinf(FFMIN(s->h_fov, 180.f) * M_PI / 360.f);
2063 s->flat_range[1] = sinf(FFMIN(s->v_fov, 180.f) * M_PI / 360.f);
2064
2065 return 0;
2066}
2067
2068/**
2069 * Calculate 3D coordinates on sphere for corresponding frame position in orthographic format.
2070 *
2071 * @param s filter private context
2072 * @param i horizontal position on frame [0, width)
2073 * @param j vertical position on frame [0, height)
2074 * @param width frame width
2075 * @param height frame height
2076 * @param vec coordinates on sphere
2077 */
2078static int orthographic_to_xyz(const V360Context *s,
2079 int i, int j, int width, int height,
2080 float *vec)
2081{
2082 const float x = rescale(i, width) * s->flat_range[0];
2083 const float y = rescale(j, height) * s->flat_range[1];
2084 const float r = hypotf(x, y);
2085 const float theta = asinf(r);
2086
2087 vec[2] = cosf(theta);
2088 if (vec[2] > 0) {
2089 vec[0] = x;
2090 vec[1] = y;
2091
2092 return 1;
2093 } else {
2094 vec[0] = 0.f;
2095 vec[1] = 0.f;
2096 vec[2] = 1.f;
2097
2098 return 0;
2099 }
2100}
2101
2102/**
2103 * Prepare data for processing orthographic input format.
2104 *
2105 * @param ctx filter context
2106 *
2107 * @return error code
2108 */
2109static int prepare_orthographic_in(AVFilterContext *ctx)
2110{
2111 V360Context *s = ctx->priv;
2112
2113 s->iflat_range[0] = sinf(FFMIN(s->ih_fov, 180.f) * M_PI / 360.f);
2114 s->iflat_range[1] = sinf(FFMIN(s->iv_fov, 180.f) * M_PI / 360.f);
2115
2116 return 0;
2117}
2118
2119/**
2120 * Calculate frame position in orthographic format for corresponding 3D coordinates on sphere.
2121 *
2122 * @param s filter private context
2123 * @param vec coordinates on sphere
2124 * @param width frame width
2125 * @param height frame height
2126 * @param us horizontal coordinates for interpolation window
2127 * @param vs vertical coordinates for interpolation window
2128 * @param du horizontal relative coordinate
2129 * @param dv vertical relative coordinate
2130 */
2131static int xyz_to_orthographic(const V360Context *s,
2132 const float *vec, int width, int height,
2133 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2134{
2135 const float theta = acosf(vec[2]);
2136 const float r = sinf(theta);
2137 const float c = r / hypotf(vec[0], vec[1]);
2138 const float x = vec[0] * c / s->iflat_range[0];
2139 const float y = vec[1] * c / s->iflat_range[1];
2140
2141 const float uf = scale(x, width);
2142 const float vf = scale(y, height);
2143
2144 const int ui = floorf(uf);
2145 const int vi = floorf(vf);
2146
2147 const int visible = vec[2] >= 0.f && isfinite(x) && isfinite(y) && vi >= 0 && vi < height && ui >= 0 && ui < width;
2148
2149 *du = visible ? uf - ui : 0.f;
2150 *dv = visible ? vf - vi : 0.f;
2151
2152 for (int i = 0; i < 4; i++) {
2153 for (int j = 0; j < 4; j++) {
2154 us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0;
2155 vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0;
2156 }
2157 }
2158
2159 return visible;
2160}
2161
2162/**
2163 * Prepare data for processing equirectangular input format.
2164 *
2165 * @param ctx filter context
2166 *
2167 * @return error code
2168 */
2169static int prepare_equirect_in(AVFilterContext *ctx)
2170{
2171 V360Context *s = ctx->priv;
2172
2173 s->iflat_range[0] = s->ih_fov * M_PI / 360.f;
2174 s->iflat_range[1] = s->iv_fov * M_PI / 360.f;
2175
2176 return 0;
2177}
2178
2179/**
2180 * Calculate frame position in equirectangular format for corresponding 3D coordinates on sphere.
2181 *
2182 * @param s filter private context
2183 * @param vec coordinates on sphere
2184 * @param width frame width
2185 * @param height frame height
2186 * @param us horizontal coordinates for interpolation window
2187 * @param vs vertical coordinates for interpolation window
2188 * @param du horizontal relative coordinate
2189 * @param dv vertical relative coordinate
2190 */
2191static int xyz_to_equirect(const V360Context *s,
2192 const float *vec, int width, int height,
2193 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2194{
2195 const float phi = atan2f(vec[0], vec[2]) / s->iflat_range[0];
2196 const float theta = asinf(vec[1]) / s->iflat_range[1];
2197
2198 const float uf = scale(phi, width);
2199 const float vf = scale(theta, height);
2200
2201 const int ui = floorf(uf);
2202 const int vi = floorf(vf);
2203 int visible;
2204
2205 *du = uf - ui;
2206 *dv = vf - vi;
2207
2208 visible = vi >= 0 && vi < height && ui >= 0 && ui < width;
2209
2210 for (int i = 0; i < 4; i++) {
2211 for (int j = 0; j < 4; j++) {
2212 us[i][j] = ereflectx(ui + j - 1, vi + i - 1, width, height);
2213 vs[i][j] = reflecty(vi + i - 1, height);
2214 }
2215 }
2216
2217 return visible;
2218}
2219
2220/**
2221 * Calculate frame position in half equirectangular format for corresponding 3D coordinates on sphere.
2222 *
2223 * @param s filter private context
2224 * @param vec coordinates on sphere
2225 * @param width frame width
2226 * @param height frame height
2227 * @param us horizontal coordinates for interpolation window
2228 * @param vs vertical coordinates for interpolation window
2229 * @param du horizontal relative coordinate
2230 * @param dv vertical relative coordinate
2231 */
2232static int xyz_to_hequirect(const V360Context *s,
2233 const float *vec, int width, int height,
2234 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2235{
2236 const float phi = atan2f(vec[0], vec[2]) / M_PI_2;
2237 const float theta = asinf(vec[1]) / M_PI_2;
2238
2239 const float uf = scale(phi, width);
2240 const float vf = scale(theta, height);
2241
2242 const int ui = floorf(uf);
2243 const int vi = floorf(vf);
2244
2245 const int visible = phi >= -M_PI_2 && phi <= M_PI_2;
2246
2247 *du = uf - ui;
2248 *dv = vf - vi;
2249
2250 for (int i = 0; i < 4; i++) {
2251 for (int j = 0; j < 4; j++) {
2252 us[i][j] = av_clip(ui + j - 1, 0, width - 1);
2253 vs[i][j] = av_clip(vi + i - 1, 0, height - 1);
2254 }
2255 }
2256
2257 return visible;
2258}
2259
2260/**
2261 * Prepare data for processing flat input format.
2262 *
2263 * @param ctx filter context
2264 *
2265 * @return error code
2266 */
2267static int prepare_flat_in(AVFilterContext *ctx)
2268{
2269 V360Context *s = ctx->priv;
2270
2271 s->iflat_range[0] = tanf(0.5f * s->ih_fov * M_PI / 180.f);
2272 s->iflat_range[1] = tanf(0.5f * s->iv_fov * M_PI / 180.f);
2273
2274 return 0;
2275}
2276
2277/**
2278 * Calculate frame position in flat format for corresponding 3D coordinates on sphere.
2279 *
2280 * @param s filter private context
2281 * @param vec coordinates on sphere
2282 * @param width frame width
2283 * @param height frame height
2284 * @param us horizontal coordinates for interpolation window
2285 * @param vs vertical coordinates for interpolation window
2286 * @param du horizontal relative coordinate
2287 * @param dv vertical relative coordinate
2288 */
2289static int xyz_to_flat(const V360Context *s,
2290 const float *vec, int width, int height,
2291 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2292{
2293 const float theta = acosf(vec[2]);
2294 const float r = tanf(theta);
2295 const float rr = fabsf(r) < 1e+6f ? r : hypotf(width, height);
2296 const float zf = vec[2];
2297 const float h = hypotf(vec[0], vec[1]);
2298 const float c = h <= 1e-6f ? 1.f : rr / h;
2299 float uf = vec[0] * c / s->iflat_range[0];
2300 float vf = vec[1] * c / s->iflat_range[1];
2301 int visible, ui, vi;
2302
2303 uf = zf >= 0.f ? scale(uf, width) : 0.f;
2304 vf = zf >= 0.f ? scale(vf, height) : 0.f;
2305
2306 ui = floorf(uf);
2307 vi = floorf(vf);
2308
2309 visible = vi >= 0 && vi < height && ui >= 0 && ui < width && zf >= 0.f;
2310
2311 *du = uf - ui;
2312 *dv = vf - vi;
2313
2314 for (int i = 0; i < 4; i++) {
2315 for (int j = 0; j < 4; j++) {
2316 us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0;
2317 vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0;
2318 }
2319 }
2320
2321 return visible;
2322}
2323
2324/**
2325 * Calculate frame position in mercator format for corresponding 3D coordinates on sphere.
2326 *
2327 * @param s filter private context
2328 * @param vec coordinates on sphere
2329 * @param width frame width
2330 * @param height frame height
2331 * @param us horizontal coordinates for interpolation window
2332 * @param vs vertical coordinates for interpolation window
2333 * @param du horizontal relative coordinate
2334 * @param dv vertical relative coordinate
2335 */
2336static int xyz_to_mercator(const V360Context *s,
2337 const float *vec, int width, int height,
2338 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2339{
2340 const float phi = atan2f(vec[0], vec[2]) / M_PI;
2341 const float theta = av_clipf(logf((1.f + vec[1]) / (1.f - vec[1])) / (2.f * M_PI), -1.f, 1.f);
2342
2343 const float uf = scale(phi, width);
2344 const float vf = scale(theta, height);
2345
2346 const int ui = floorf(uf);
2347 const int vi = floorf(vf);
2348
2349 *du = uf - ui;
2350 *dv = vf - vi;
2351
2352 for (int i = 0; i < 4; i++) {
2353 for (int j = 0; j < 4; j++) {
2354 us[i][j] = av_clip(ui + j - 1, 0, width - 1);
2355 vs[i][j] = av_clip(vi + i - 1, 0, height - 1);
2356 }
2357 }
2358
2359 return 1;
2360}
2361
2362/**
2363 * Calculate 3D coordinates on sphere for corresponding frame position in mercator format.
2364 *
2365 * @param s filter private context
2366 * @param i horizontal position on frame [0, width)
2367 * @param j vertical position on frame [0, height)
2368 * @param width frame width
2369 * @param height frame height
2370 * @param vec coordinates on sphere
2371 */
2372static int mercator_to_xyz(const V360Context *s,
2373 int i, int j, int width, int height,
2374 float *vec)
2375{
2376 const float phi = rescale(i, width) * M_PI + M_PI_2;
2377 const float y = rescale(j, height) * M_PI;
2378 const float div = expf(2.f * y) + 1.f;
2379
2380 const float sin_phi = sinf(phi);
2381 const float cos_phi = cosf(phi);
2382 const float sin_theta = 2.f * expf(y) / div;
2383 const float cos_theta = (expf(2.f * y) - 1.f) / div;
2384
2385 vec[0] = -sin_theta * cos_phi;
2386 vec[1] = cos_theta;
2387 vec[2] = sin_theta * sin_phi;
2388
2389 return 1;
2390}
2391
2392/**
2393 * Calculate frame position in ball format for corresponding 3D coordinates on sphere.
2394 *
2395 * @param s filter private context
2396 * @param vec coordinates on sphere
2397 * @param width frame width
2398 * @param height frame height
2399 * @param us horizontal coordinates for interpolation window
2400 * @param vs vertical coordinates for interpolation window
2401 * @param du horizontal relative coordinate
2402 * @param dv vertical relative coordinate
2403 */
2404static int xyz_to_ball(const V360Context *s,
2405 const float *vec, int width, int height,
2406 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2407{
2408 const float l = hypotf(vec[0], vec[1]);
2409 const float r = sqrtf(1.f - vec[2]) / M_SQRT2;
2410 const float d = l > 0.f ? l : 1.f;
2411
2412 const float uf = scale(r * vec[0] / d, width);
2413 const float vf = scale(r * vec[1] / d, height);
2414
2415 const int ui = floorf(uf);
2416 const int vi = floorf(vf);
2417
2418 *du = uf - ui;
2419 *dv = vf - vi;
2420
2421 for (int i = 0; i < 4; i++) {
2422 for (int j = 0; j < 4; j++) {
2423 us[i][j] = av_clip(ui + j - 1, 0, width - 1);
2424 vs[i][j] = av_clip(vi + i - 1, 0, height - 1);
2425 }
2426 }
2427
2428 return 1;
2429}
2430
2431/**
2432 * Calculate 3D coordinates on sphere for corresponding frame position in ball format.
2433 *
2434 * @param s filter private context
2435 * @param i horizontal position on frame [0, width)
2436 * @param j vertical position on frame [0, height)
2437 * @param width frame width
2438 * @param height frame height
2439 * @param vec coordinates on sphere
2440 */
2441static int ball_to_xyz(const V360Context *s,
2442 int i, int j, int width, int height,
2443 float *vec)
2444{
2445 const float x = rescale(i, width);
2446 const float y = rescale(j, height);
2447 const float l = hypotf(x, y);
2448
2449 if (l <= 1.f) {
2450 const float z = 2.f * l * sqrtf(1.f - l * l);
2451
2452 vec[0] = z * x / (l > 0.f ? l : 1.f);
2453 vec[1] = z * y / (l > 0.f ? l : 1.f);
2454 vec[2] = 1.f - 2.f * l * l;
2455 } else {
2456 vec[0] = 0.f;
2457 vec[1] = 1.f;
2458 vec[2] = 0.f;
2459 return 0;
2460 }
2461
2462 return 1;
2463}
2464
2465/**
2466 * Calculate 3D coordinates on sphere for corresponding frame position in hammer format.
2467 *
2468 * @param s filter private context
2469 * @param i horizontal position on frame [0, width)
2470 * @param j vertical position on frame [0, height)
2471 * @param width frame width
2472 * @param height frame height
2473 * @param vec coordinates on sphere
2474 */
2475static int hammer_to_xyz(const V360Context *s,
2476 int i, int j, int width, int height,
2477 float *vec)
2478{
2479 const float x = rescale(i, width);
2480 const float y = rescale(j, height);
2481
2482 const float xx = x * x;
2483 const float yy = y * y;
2484
2485 const float z = sqrtf(1.f - xx * 0.5f - yy * 0.5f);
2486
2487 const float a = M_SQRT2 * x * z;
2488 const float b = 2.f * z * z - 1.f;
2489
2490 const float aa = a * a;
2491 const float bb = b * b;
2492
2493 const float w = sqrtf(1.f - 2.f * yy * z * z);
2494
2495 vec[0] = w * 2.f * a * b / (aa + bb);
2496 vec[1] = M_SQRT2 * y * z;
2497 vec[2] = w * (bb - aa) / (aa + bb);
2498
2499 return 1;
2500}
2501
2502/**
2503 * Calculate frame position in hammer format for corresponding 3D coordinates on sphere.
2504 *
2505 * @param s filter private context
2506 * @param vec coordinates on sphere
2507 * @param width frame width
2508 * @param height frame height
2509 * @param us horizontal coordinates for interpolation window
2510 * @param vs vertical coordinates for interpolation window
2511 * @param du horizontal relative coordinate
2512 * @param dv vertical relative coordinate
2513 */
2514static int xyz_to_hammer(const V360Context *s,
2515 const float *vec, int width, int height,
2516 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2517{
2518 const float theta = atan2f(vec[0], vec[2]);
2519
2520 const float z = sqrtf(1.f + sqrtf(1.f - vec[1] * vec[1]) * cosf(theta * 0.5f));
2521 const float x = sqrtf(1.f - vec[1] * vec[1]) * sinf(theta * 0.5f) / z;
2522 const float y = vec[1] / z;
2523
2524 const float uf = (x + 1.f) * width / 2.f;
2525 const float vf = (y + 1.f) * height / 2.f;
2526
2527 const int ui = floorf(uf);
2528 const int vi = floorf(vf);
2529
2530 *du = uf - ui;
2531 *dv = vf - vi;
2532
2533 for (int i = 0; i < 4; i++) {
2534 for (int j = 0; j < 4; j++) {
2535 us[i][j] = av_clip(ui + j - 1, 0, width - 1);
2536 vs[i][j] = av_clip(vi + i - 1, 0, height - 1);
2537 }
2538 }
2539
2540 return 1;
2541}
2542
2543/**
2544 * Calculate 3D coordinates on sphere for corresponding frame position in sinusoidal format.
2545 *
2546 * @param s filter private context
2547 * @param i horizontal position on frame [0, width)
2548 * @param j vertical position on frame [0, height)
2549 * @param width frame width
2550 * @param height frame height
2551 * @param vec coordinates on sphere
2552 */
2553static int sinusoidal_to_xyz(const V360Context *s,
2554 int i, int j, int width, int height,
2555 float *vec)
2556{
2557 const float theta = rescale(j, height) * M_PI_2;
2558 const float phi = rescale(i, width) * M_PI / cosf(theta);
2559
2560 const float sin_phi = sinf(phi);
2561 const float cos_phi = cosf(phi);
2562 const float sin_theta = sinf(theta);
2563 const float cos_theta = cosf(theta);
2564
2565 vec[0] = cos_theta * sin_phi;
2566 vec[1] = sin_theta;
2567 vec[2] = cos_theta * cos_phi;
2568
2569 return 1;
2570}
2571
2572/**
2573 * Calculate frame position in sinusoidal format for corresponding 3D coordinates on sphere.
2574 *
2575 * @param s filter private context
2576 * @param vec coordinates on sphere
2577 * @param width frame width
2578 * @param height frame height
2579 * @param us horizontal coordinates for interpolation window
2580 * @param vs vertical coordinates for interpolation window
2581 * @param du horizontal relative coordinate
2582 * @param dv vertical relative coordinate
2583 */
2584static int xyz_to_sinusoidal(const V360Context *s,
2585 const float *vec, int width, int height,
2586 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2587{
2588 const float theta = asinf(vec[1]);
2589 const float phi = atan2f(vec[0], vec[2]) * cosf(theta);
2590
2591 const float uf = scale(phi / M_PI, width);
2592 const float vf = scale(theta / M_PI_2, height);
2593
2594 const int ui = floorf(uf);
2595 const int vi = floorf(vf);
2596
2597 *du = uf - ui;
2598 *dv = vf - vi;
2599
2600 for (int i = 0; i < 4; i++) {
2601 for (int j = 0; j < 4; j++) {
2602 us[i][j] = av_clip(ui + j - 1, 0, width - 1);
2603 vs[i][j] = av_clip(vi + i - 1, 0, height - 1);
2604 }
2605 }
2606
2607 return 1;
2608}
2609
2610/**
2611 * Prepare data for processing equi-angular cubemap input format.
2612 *
2613 * @param ctx filter context
2614 *
2615 * @return error code
2616 */
2617static int prepare_eac_in(AVFilterContext *ctx)
2618{
2619 V360Context *s = ctx->priv;
2620
2621 s->in_cubemap_face_order[RIGHT] = TOP_RIGHT;
2622 s->in_cubemap_face_order[LEFT] = TOP_LEFT;
2623 s->in_cubemap_face_order[UP] = BOTTOM_RIGHT;
2624 s->in_cubemap_face_order[DOWN] = BOTTOM_LEFT;
2625 s->in_cubemap_face_order[FRONT] = TOP_MIDDLE;
2626 s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE;
2627
2628 s->in_cubemap_face_rotation[TOP_LEFT] = ROT_0;
2629 s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_0;
2630 s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_0;
2631 s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_270;
2632 s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_90;
2633 s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_270;
2634
2635 return 0;
2636}
2637
2638/**
2639 * Prepare data for processing equi-angular cubemap output format.
2640 *
2641 * @param ctx filter context
2642 *
2643 * @return error code
2644 */
2645static int prepare_eac_out(AVFilterContext *ctx)
2646{
2647 V360Context *s = ctx->priv;
2648
2649 s->out_cubemap_direction_order[TOP_LEFT] = LEFT;
2650 s->out_cubemap_direction_order[TOP_MIDDLE] = FRONT;
2651 s->out_cubemap_direction_order[TOP_RIGHT] = RIGHT;
2652 s->out_cubemap_direction_order[BOTTOM_LEFT] = DOWN;
2653 s->out_cubemap_direction_order[BOTTOM_MIDDLE] = BACK;
2654 s->out_cubemap_direction_order[BOTTOM_RIGHT] = UP;
2655
2656 s->out_cubemap_face_rotation[TOP_LEFT] = ROT_0;
2657 s->out_cubemap_face_rotation[TOP_MIDDLE] = ROT_0;
2658 s->out_cubemap_face_rotation[TOP_RIGHT] = ROT_0;
2659 s->out_cubemap_face_rotation[BOTTOM_LEFT] = ROT_270;
2660 s->out_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_90;
2661 s->out_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_270;
2662
2663 return 0;
2664}
2665
2666/**
2667 * Calculate 3D coordinates on sphere for corresponding frame position in equi-angular cubemap format.
2668 *
2669 * @param s filter private context
2670 * @param i horizontal position on frame [0, width)
2671 * @param j vertical position on frame [0, height)
2672 * @param width frame width
2673 * @param height frame height
2674 * @param vec coordinates on sphere
2675 */
2676static int eac_to_xyz(const V360Context *s,
2677 int i, int j, int width, int height,
2678 float *vec)
2679{
2680 const float pixel_pad = 2;
2681 const float u_pad = pixel_pad / width;
2682 const float v_pad = pixel_pad / height;
2683
2684 int u_face, v_face, face;
2685
2686 float l_x, l_y, l_z;
2687
2688 float uf = (i + 0.5f) / width;
2689 float vf = (j + 0.5f) / height;
2690
2691 // EAC has 2-pixel padding on faces except between faces on the same row
2692 // Padding pixels seems not to be stretched with tangent as regular pixels
2693 // Formulas below approximate original padding as close as I could get experimentally
2694
2695 // Horizontal padding
2696 uf = 3.f * (uf - u_pad) / (1.f - 2.f * u_pad);
2697 if (uf < 0.f) {
2698 u_face = 0;
2699 uf -= 0.5f;
2700 } else if (uf >= 3.f) {
2701 u_face = 2;
2702 uf -= 2.5f;
2703 } else {
2704 u_face = floorf(uf);
2705 uf = fmodf(uf, 1.f) - 0.5f;
2706 }
2707
2708 // Vertical padding
2709 v_face = floorf(vf * 2.f);
2710 vf = (vf - v_pad - 0.5f * v_face) / (0.5f - 2.f * v_pad) - 0.5f;
2711
2712 if (uf >= -0.5f && uf < 0.5f) {
2713 uf = tanf(M_PI_2 * uf);
2714 } else {
2715 uf = 2.f * uf;
2716 }
2717 if (vf >= -0.5f && vf < 0.5f) {
2718 vf = tanf(M_PI_2 * vf);
2719 } else {
2720 vf = 2.f * vf;
2721 }
2722
2723 face = u_face + 3 * v_face;
2724
2725 switch (face) {
2726 case TOP_LEFT:
2727 l_x = -1.f;
2728 l_y = vf;
2729 l_z = uf;
2730 break;
2731 case TOP_MIDDLE:
2732 l_x = uf;
2733 l_y = vf;
2734 l_z = 1.f;
2735 break;
2736 case TOP_RIGHT:
2737 l_x = 1.f;
2738 l_y = vf;
2739 l_z = -uf;
2740 break;
2741 case BOTTOM_LEFT:
2742 l_x = -vf;
2743 l_y = 1.f;
2744 l_z = -uf;
2745 break;
2746 case BOTTOM_MIDDLE:
2747 l_x = -vf;
2748 l_y = -uf;
2749 l_z = -1.f;
2750 break;
2751 case BOTTOM_RIGHT:
2752 l_x = -vf;
2753 l_y = -1.f;
2754 l_z = uf;
2755 break;
2756 default:
2757 av_assert0(0);
2758 }
2759
2760 vec[0] = l_x;
2761 vec[1] = l_y;
2762 vec[2] = l_z;
2763
2764 return 1;
2765}
2766
2767/**
2768 * Calculate frame position in equi-angular cubemap format for corresponding 3D coordinates on sphere.
2769 *
2770 * @param s filter private context
2771 * @param vec coordinates on sphere
2772 * @param width frame width
2773 * @param height frame height
2774 * @param us horizontal coordinates for interpolation window
2775 * @param vs vertical coordinates for interpolation window
2776 * @param du horizontal relative coordinate
2777 * @param dv vertical relative coordinate
2778 */
2779static int xyz_to_eac(const V360Context *s,
2780 const float *vec, int width, int height,
2781 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2782{
2783 const float pixel_pad = 2;
2784 const float u_pad = pixel_pad / width;
2785 const float v_pad = pixel_pad / height;
2786
2787 float uf, vf;
2788 int ui, vi;
2789 int direction, face;
2790 int u_face, v_face;
2791
2792 xyz_to_cube(s, vec, &uf, &vf, &direction);
2793
2794 face = s->in_cubemap_face_order[direction];
2795 u_face = face % 3;
2796 v_face = face / 3;
2797
2798 uf = M_2_PI * atanf(uf) + 0.5f;
2799 vf = M_2_PI * atanf(vf) + 0.5f;
2800
2801 // These formulas are inversed from eac_to_xyz ones
2802 uf = (uf + u_face) * (1.f - 2.f * u_pad) / 3.f + u_pad;
2803 vf = vf * (0.5f - 2.f * v_pad) + v_pad + 0.5f * v_face;
2804
2805 uf *= width;
2806 vf *= height;
2807
2808 uf -= 0.5f;
2809 vf -= 0.5f;
2810
2811 ui = floorf(uf);
2812 vi = floorf(vf);
2813
2814 *du = uf - ui;
2815 *dv = vf - vi;
2816
2817 for (int i = 0; i < 4; i++) {
2818 for (int j = 0; j < 4; j++) {
2819 us[i][j] = av_clip(ui + j - 1, 0, width - 1);
2820 vs[i][j] = av_clip(vi + i - 1, 0, height - 1);
2821 }
2822 }
2823
2824 return 1;
2825}
2826
2827/**
2828 * Prepare data for processing flat output format.
2829 *
2830 * @param ctx filter context
2831 *
2832 * @return error code
2833 */
2834static int prepare_flat_out(AVFilterContext *ctx)
2835{
2836 V360Context *s = ctx->priv;
2837
2838 s->flat_range[0] = tanf(0.5f * s->h_fov * M_PI / 180.f);
2839 s->flat_range[1] = tanf(0.5f * s->v_fov * M_PI / 180.f);
2840
2841 return 0;
2842}
2843
2844/**
2845 * Calculate 3D coordinates on sphere for corresponding frame position in flat format.
2846 *
2847 * @param s filter private context
2848 * @param i horizontal position on frame [0, width)
2849 * @param j vertical position on frame [0, height)
2850 * @param width frame width
2851 * @param height frame height
2852 * @param vec coordinates on sphere
2853 */
2854static int flat_to_xyz(const V360Context *s,
2855 int i, int j, int width, int height,
2856 float *vec)
2857{
2858 const float l_x = s->flat_range[0] * rescale(i, width);
2859 const float l_y = s->flat_range[1] * rescale(j, height);
2860
2861 vec[0] = l_x;
2862 vec[1] = l_y;
2863 vec[2] = 1.f;
2864
2865 return 1;
2866}
2867
2868/**
2869 * Prepare data for processing fisheye output format.
2870 *
2871 * @param ctx filter context
2872 *
2873 * @return error code
2874 */
2875static int prepare_fisheye_out(AVFilterContext *ctx)
2876{
2877 V360Context *s = ctx->priv;
2878
2879 s->flat_range[0] = s->h_fov / 180.f;
2880 s->flat_range[1] = s->v_fov / 180.f;
2881
2882 return 0;
2883}
2884
2885/**
2886 * Calculate 3D coordinates on sphere for corresponding frame position in fisheye format.
2887 *
2888 * @param s filter private context
2889 * @param i horizontal position on frame [0, width)
2890 * @param j vertical position on frame [0, height)
2891 * @param width frame width
2892 * @param height frame height
2893 * @param vec coordinates on sphere
2894 */
2895static int fisheye_to_xyz(const V360Context *s,
2896 int i, int j, int width, int height,
2897 float *vec)
2898{
2899 const float uf = s->flat_range[0] * rescale(i, width);
2900 const float vf = s->flat_range[1] * rescale(j, height);
2901
2902 const float phi = atan2f(vf, uf);
2903 const float theta = M_PI_2 * (1.f - hypotf(uf, vf));
2904
2905 const float sin_phi = sinf(phi);
2906 const float cos_phi = cosf(phi);
2907 const float sin_theta = sinf(theta);
2908 const float cos_theta = cosf(theta);
2909
2910 vec[0] = cos_theta * cos_phi;
2911 vec[1] = cos_theta * sin_phi;
2912 vec[2] = sin_theta;
2913
2914 return 1;
2915}
2916
2917/**
2918 * Prepare data for processing fisheye input format.
2919 *
2920 * @param ctx filter context
2921 *
2922 * @return error code
2923 */
2924static int prepare_fisheye_in(AVFilterContext *ctx)
2925{
2926 V360Context *s = ctx->priv;
2927
2928 s->iflat_range[0] = s->ih_fov / 180.f;
2929 s->iflat_range[1] = s->iv_fov / 180.f;
2930
2931 return 0;
2932}
2933
2934/**
2935 * Calculate frame position in fisheye format for corresponding 3D coordinates on sphere.
2936 *
2937 * @param s filter private context
2938 * @param vec coordinates on sphere
2939 * @param width frame width
2940 * @param height frame height
2941 * @param us horizontal coordinates for interpolation window
2942 * @param vs vertical coordinates for interpolation window
2943 * @param du horizontal relative coordinate
2944 * @param dv vertical relative coordinate
2945 */
2946static int xyz_to_fisheye(const V360Context *s,
2947 const float *vec, int width, int height,
2948 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
2949{
2950 const float h = hypotf(vec[0], vec[1]);
2951 const float lh = h > 0.f ? h : 1.f;
2952 const float phi = atan2f(h, vec[2]) / M_PI;
2953
2954 float uf = vec[0] / lh * phi / s->iflat_range[0];
2955 float vf = vec[1] / lh * phi / s->iflat_range[1];
2956
2957 const int visible = -0.5f < uf && uf < 0.5f && -0.5f < vf && vf < 0.5f;
2958 int ui, vi;
2959
2960 uf = scale(uf * 2.f, width);
2961 vf = scale(vf * 2.f, height);
2962
2963 ui = floorf(uf);
2964 vi = floorf(vf);
2965
2966 *du = visible ? uf - ui : 0.f;
2967 *dv = visible ? vf - vi : 0.f;
2968
2969 for (int i = 0; i < 4; i++) {
2970 for (int j = 0; j < 4; j++) {
2971 us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0;
2972 vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0;
2973 }
2974 }
2975
2976 return visible;
2977}
2978
2979/**
2980 * Calculate 3D coordinates on sphere for corresponding frame position in pannini format.
2981 *
2982 * @param s filter private context
2983 * @param i horizontal position on frame [0, width)
2984 * @param j vertical position on frame [0, height)
2985 * @param width frame width
2986 * @param height frame height
2987 * @param vec coordinates on sphere
2988 */
2989static int pannini_to_xyz(const V360Context *s,
2990 int i, int j, int width, int height,
2991 float *vec)
2992{
2993 const float uf = rescale(i, width);
2994 const float vf = rescale(j, height);
2995
2996 const float d = s->h_fov;
2997 const float k = uf * uf / ((d + 1.f) * (d + 1.f));
2998 const float dscr = k * k * d * d - (k + 1.f) * (k * d * d - 1.f);
2999 const float clon = (-k * d + sqrtf(dscr)) / (k + 1.f);
3000 const float S = (d + 1.f) / (d + clon);
3001 const float lon = atan2f(uf, S * clon);
3002 const float lat = atan2f(vf, S);
3003
3004 vec[0] = sinf(lon) * cosf(lat);
3005 vec[1] = sinf(lat);
3006 vec[2] = cosf(lon) * cosf(lat);
3007
3008 return 1;
3009}
3010
3011/**
3012 * Calculate frame position in pannini format for corresponding 3D coordinates on sphere.
3013 *
3014 * @param s filter private context
3015 * @param vec coordinates on sphere
3016 * @param width frame width
3017 * @param height frame height
3018 * @param us horizontal coordinates for interpolation window
3019 * @param vs vertical coordinates for interpolation window
3020 * @param du horizontal relative coordinate
3021 * @param dv vertical relative coordinate
3022 */
3023static int xyz_to_pannini(const V360Context *s,
3024 const float *vec, int width, int height,
3025 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
3026{
3027 const float phi = atan2f(vec[0], vec[2]);
3028 const float theta = asinf(vec[1]);
3029
3030 const float d = s->ih_fov;
3031 const float S = (d + 1.f) / (d + cosf(phi));
3032
3033 const float x = S * sinf(phi);
3034 const float y = S * tanf(theta);
3035
3036 const float uf = scale(x, width);
3037 const float vf = scale(y, height);
3038
3039 const int ui = floorf(uf);
3040 const int vi = floorf(vf);
3041
3042 const int visible = vi >= 0 && vi < height && ui >= 0 && ui < width && vec[2] >= 0.f;
3043
3044 *du = uf - ui;
3045 *dv = vf - vi;
3046
3047 for (int i = 0; i < 4; i++) {
3048 for (int j = 0; j < 4; j++) {
3049 us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0;
3050 vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0;
3051 }
3052 }
3053
3054 return visible;
3055}
3056
3057/**
3058 * Prepare data for processing cylindrical output format.
3059 *
3060 * @param ctx filter context
3061 *
3062 * @return error code
3063 */
3064static int prepare_cylindrical_out(AVFilterContext *ctx)
3065{
3066 V360Context *s = ctx->priv;
3067
3068 s->flat_range[0] = M_PI * s->h_fov / 360.f;
3069 s->flat_range[1] = tanf(0.5f * s->v_fov * M_PI / 180.f);
3070
3071 return 0;
3072}
3073
3074/**
3075 * Calculate 3D coordinates on sphere for corresponding frame position in cylindrical format.
3076 *
3077 * @param s filter private context
3078 * @param i horizontal position on frame [0, width)
3079 * @param j vertical position on frame [0, height)
3080 * @param width frame width
3081 * @param height frame height
3082 * @param vec coordinates on sphere
3083 */
3084static int cylindrical_to_xyz(const V360Context *s,
3085 int i, int j, int width, int height,
3086 float *vec)
3087{
3088 const float uf = s->flat_range[0] * rescale(i, width);
3089 const float vf = s->flat_range[1] * rescale(j, height);
3090
3091 const float phi = uf;
3092 const float theta = atanf(vf);
3093
3094 const float sin_phi = sinf(phi);
3095 const float cos_phi = cosf(phi);
3096 const float sin_theta = sinf(theta);
3097 const float cos_theta = cosf(theta);
3098
3099 vec[0] = cos_theta * sin_phi;
3100 vec[1] = sin_theta;
3101 vec[2] = cos_theta * cos_phi;
3102
3103 return 1;
3104}
3105
3106/**
3107 * Prepare data for processing cylindrical input format.
3108 *
3109 * @param ctx filter context
3110 *
3111 * @return error code
3112 */
3113static int prepare_cylindrical_in(AVFilterContext *ctx)
3114{
3115 V360Context *s = ctx->priv;
3116
3117 s->iflat_range[0] = M_PI * s->ih_fov / 360.f;
3118 s->iflat_range[1] = tanf(0.5f * s->iv_fov * M_PI / 180.f);
3119
3120 return 0;
3121}
3122
3123/**
3124 * Calculate frame position in cylindrical format for corresponding 3D coordinates on sphere.
3125 *
3126 * @param s filter private context
3127 * @param vec coordinates on sphere
3128 * @param width frame width
3129 * @param height frame height
3130 * @param us horizontal coordinates for interpolation window
3131 * @param vs vertical coordinates for interpolation window
3132 * @param du horizontal relative coordinate
3133 * @param dv vertical relative coordinate
3134 */
3135static int xyz_to_cylindrical(const V360Context *s,
3136 const float *vec, int width, int height,
3137 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
3138{
3139 const float phi = atan2f(vec[0], vec[2]) / s->iflat_range[0];
3140 const float theta = asinf(vec[1]);
3141
3142 const float uf = scale(phi, width);
3143 const float vf = scale(tanf(theta) / s->iflat_range[1], height);
3144
3145 const int ui = floorf(uf);
3146 const int vi = floorf(vf);
3147
3148 const int visible = vi >= 0 && vi < height && ui >= 0 && ui < width &&
3149 theta <= M_PI * s->iv_fov / 180.f &&
3150 theta >= -M_PI * s->iv_fov / 180.f;
3151
3152 *du = uf - ui;
3153 *dv = vf - vi;
3154
3155 for (int i = 0; i < 4; i++) {
3156 for (int j = 0; j < 4; j++) {
3157 us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0;
3158 vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0;
3159 }
3160 }
3161
3162 return visible;
3163}
3164
3165/**
3166 * Prepare data for processing cylindrical equal area output format.
3167 *
3168 * @param ctx filter context
3169 *
3170 * @return error code
3171 */
3172static int prepare_cylindricalea_out(AVFilterContext *ctx)
3173{
3174 V360Context *s = ctx->priv;
3175
3176 s->flat_range[0] = s->h_fov * M_PI / 360.f;
3177 s->flat_range[1] = s->v_fov / 180.f;
3178
3179 return 0;
3180}
3181
3182/**
3183 * Prepare data for processing cylindrical equal area input format.
3184 *
3185 * @param ctx filter context
3186 *
3187 * @return error code
3188 */
3189static int prepare_cylindricalea_in(AVFilterContext *ctx)
3190{
3191 V360Context *s = ctx->priv;
3192
3193 s->iflat_range[0] = M_PI * s->ih_fov / 360.f;
3194 s->iflat_range[1] = s->iv_fov / 180.f;
3195
3196 return 0;
3197}
3198
3199/**
3200 * Calculate 3D coordinates on sphere for corresponding frame position in cylindrical equal area format.
3201 *
3202 * @param s filter private context
3203 * @param i horizontal position on frame [0, width)
3204 * @param j vertical position on frame [0, height)
3205 * @param width frame width
3206 * @param height frame height
3207 * @param vec coordinates on sphere
3208 */
3209static int cylindricalea_to_xyz(const V360Context *s,
3210 int i, int j, int width, int height,
3211 float *vec)
3212{
3213 const float uf = s->flat_range[0] * rescale(i, width);
3214 const float vf = s->flat_range[1] * rescale(j, height);
3215
3216 const float phi = uf;
3217 const float theta = asinf(vf);
3218
3219 const float sin_phi = sinf(phi);
3220 const float cos_phi = cosf(phi);
3221 const float sin_theta = sinf(theta);
3222 const float cos_theta = cosf(theta);
3223
3224 vec[0] = cos_theta * sin_phi;
3225 vec[1] = sin_theta;
3226 vec[2] = cos_theta * cos_phi;
3227
3228 return 1;
3229}
3230
3231/**
3232 * Calculate frame position in cylindrical equal area format for corresponding 3D coordinates on sphere.
3233 *
3234 * @param s filter private context
3235 * @param vec coordinates on sphere
3236 * @param width frame width
3237 * @param height frame height
3238 * @param us horizontal coordinates for interpolation window
3239 * @param vs vertical coordinates for interpolation window
3240 * @param du horizontal relative coordinate
3241 * @param dv vertical relative coordinate
3242 */
3243static int xyz_to_cylindricalea(const V360Context *s,
3244 const float *vec, int width, int height,
3245 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
3246{
3247 const float phi = atan2f(vec[0], vec[2]) / s->iflat_range[0];
3248 const float theta = asinf(vec[1]);
3249
3250 const float uf = scale(phi, width);
3251 const float vf = scale(sinf(theta) / s->iflat_range[1], height);
3252
3253 const int ui = floorf(uf);
3254 const int vi = floorf(vf);
3255
3256 const int visible = vi >= 0 && vi < height && ui >= 0 && ui < width &&
3257 theta <= M_PI * s->iv_fov / 180.f &&
3258 theta >= -M_PI * s->iv_fov / 180.f;
3259
3260 *du = uf - ui;
3261 *dv = vf - vi;
3262
3263 for (int i = 0; i < 4; i++) {
3264 for (int j = 0; j < 4; j++) {
3265 us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0;
3266 vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0;
3267 }
3268 }
3269
3270 return visible;
3271}
3272
3273/**
3274 * Calculate 3D coordinates on sphere for corresponding frame position in perspective format.
3275 *
3276 * @param s filter private context
3277 * @param i horizontal position on frame [0, width)
3278 * @param j vertical position on frame [0, height)
3279 * @param width frame width
3280 * @param height frame height
3281 * @param vec coordinates on sphere
3282 */
3283static int perspective_to_xyz(const V360Context *s,
3284 int i, int j, int width, int height,
3285 float *vec)
3286{
3287 const float uf = rescale(i, width);
3288 const float vf = rescale(j, height);
3289 const float rh = hypotf(uf, vf);
3290 const float sinzz = 1.f - rh * rh;
3291 const float h = 1.f + s->v_fov;
3292 const float sinz = (h - sqrtf(sinzz)) / (h / rh + rh / h);
3293 const float sinz2 = sinz * sinz;
3294
3295 if (sinz2 <= 1.f) {
3296 const float cosz = sqrtf(1.f - sinz2);
3297
3298 const float theta = asinf(cosz);
3299 const float phi = atan2f(uf, vf);
3300
3301 const float sin_phi = sinf(phi);
3302 const float cos_phi = cosf(phi);
3303 const float sin_theta = sinf(theta);
3304 const float cos_theta = cosf(theta);
3305
3306 vec[0] = cos_theta * sin_phi;
3307 vec[1] = cos_theta * cos_phi;
3308 vec[2] = sin_theta;
3309 } else {
3310 vec[0] = 0.f;
3311 vec[1] = 1.f;
3312 vec[2] = 0.f;
3313 return 0;
3314 }
3315
3316 return 1;
3317}
3318
3319/**
3320 * Calculate 3D coordinates on sphere for corresponding frame position in tetrahedron format.
3321 *
3322 * @param s filter private context
3323 * @param i horizontal position on frame [0, width)
3324 * @param j vertical position on frame [0, height)
3325 * @param width frame width
3326 * @param height frame height
3327 * @param vec coordinates on sphere
3328 */
3329static int tetrahedron_to_xyz(const V360Context *s,
3330 int i, int j, int width, int height,
3331 float *vec)
3332{
3333 const float uf = ((float)i + 0.5f) / width;
3334 const float vf = ((float)j + 0.5f) / height;
3335
3336 vec[0] = uf < 0.5f ? uf * 4.f - 1.f : 3.f - uf * 4.f;
3337 vec[1] = 1.f - vf * 2.f;
3338 vec[2] = 2.f * fabsf(1.f - fabsf(1.f - uf * 2.f + vf)) - 1.f;
3339
3340 return 1;
3341}
3342
3343/**
3344 * Calculate frame position in tetrahedron format for corresponding 3D coordinates on sphere.
3345 *
3346 * @param s filter private context
3347 * @param vec coordinates on sphere
3348 * @param width frame width
3349 * @param height frame height
3350 * @param us horizontal coordinates for interpolation window
3351 * @param vs vertical coordinates for interpolation window
3352 * @param du horizontal relative coordinate
3353 * @param dv vertical relative coordinate
3354 */
3355static int xyz_to_tetrahedron(const V360Context *s,
3356 const float *vec, int width, int height,
3357 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
3358{
3359 const float d0 = vec[0] * 1.f + vec[1] * 1.f + vec[2] *-1.f;
3360 const float d1 = vec[0] *-1.f + vec[1] *-1.f + vec[2] *-1.f;
3361 const float d2 = vec[0] * 1.f + vec[1] *-1.f + vec[2] * 1.f;
3362 const float d3 = vec[0] *-1.f + vec[1] * 1.f + vec[2] * 1.f;
3363 const float d = FFMAX(d0, FFMAX3(d1, d2, d3));
3364
3365 float uf, vf, x, y, z;
3366 int ui, vi;
3367
3368 x = vec[0] / d;
3369 y = vec[1] / d;
3370 z = -vec[2] / d;
3371
3372 vf = 0.5f - y * 0.5f;
3373
3374 if ((x + y >= 0.f && y + z >= 0.f && -z - x <= 0.f) ||
3375 (x + y <= 0.f && -y + z >= 0.f && z - x >= 0.f)) {
3376 uf = 0.25f * x + 0.25f;
3377 } else {
3378 uf = 0.75f - 0.25f * x;
3379 }
3380
3381 uf *= width;
3382 vf *= height;
3383
3384 ui = floorf(uf);
3385 vi = floorf(vf);
3386
3387 *du = uf - ui;
3388 *dv = vf - vi;
3389
3390 for (int i = 0; i < 4; i++) {
3391 for (int j = 0; j < 4; j++) {
3392 us[i][j] = reflectx(ui + j - 1, vi + i - 1, width, height);
3393 vs[i][j] = reflecty(vi + i - 1, height);
3394 }
3395 }
3396
3397 return 1;
3398}
3399
3400/**
3401 * Prepare data for processing double fisheye input format.
3402 *
3403 * @param ctx filter context
3404 *
3405 * @return error code
3406 */
3407static int prepare_dfisheye_in(AVFilterContext *ctx)
3408{
3409 V360Context *s = ctx->priv;
3410
3411 s->iflat_range[0] = s->ih_fov / 360.f;
3412 s->iflat_range[1] = s->iv_fov / 360.f;
3413
3414 return 0;
3415}
3416
3417/**
3418 * Calculate 3D coordinates on sphere for corresponding frame position in dual fisheye format.
3419 *
3420 * @param s filter private context
3421 * @param i horizontal position on frame [0, width)
3422 * @param j vertical position on frame [0, height)
3423 * @param width frame width
3424 * @param height frame height
3425 * @param vec coordinates on sphere
3426 */
3427static int dfisheye_to_xyz(const V360Context *s,
3428 int i, int j, int width, int height,
3429 float *vec)
3430{
3431 const float ew = width * 0.5f;
3432 const float eh = height;
3433
3434 const int ei = i >= ew ? i - ew : i;
3435 const float m = i >= ew ? 1.f : -1.f;
3436
3437 const float uf = s->flat_range[0] * rescale(ei, ew);
3438 const float vf = s->flat_range[1] * rescale(j, eh);
3439
3440 const float h = hypotf(uf, vf);
3441 const float lh = h > 0.f ? h : 1.f;
3442 const float theta = m * M_PI_2 * (1.f - h);
3443
3444 const float sin_theta = sinf(theta);
3445 const float cos_theta = cosf(theta);
3446
3447 vec[0] = cos_theta * m * uf / lh;
3448 vec[1] = cos_theta * vf / lh;
3449 vec[2] = sin_theta;
3450
3451 return 1;
3452}
3453
3454/**
3455 * Calculate frame position in dual fisheye format for corresponding 3D coordinates on sphere.
3456 *
3457 * @param s filter private context
3458 * @param vec coordinates on sphere
3459 * @param width frame width
3460 * @param height frame height
3461 * @param us horizontal coordinates for interpolation window
3462 * @param vs vertical coordinates for interpolation window
3463 * @param du horizontal relative coordinate
3464 * @param dv vertical relative coordinate
3465 */
3466static int xyz_to_dfisheye(const V360Context *s,
3467 const float *vec, int width, int height,
3468 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
3469{
3470 const float ew = width * 0.5f;
3471 const float eh = height;
3472
3473 const float h = hypotf(vec[0], vec[1]);
3474 const float lh = h > 0.f ? h : 1.f;
3475 const float theta = acosf(fabsf(vec[2])) / M_PI;
3476
3477 float uf = scale(theta * (vec[0] / lh) / s->iflat_range[0], ew);
3478 float vf = scale(theta * (vec[1] / lh) / s->iflat_range[1], eh);
3479
3480 int ui, vi;
3481 int u_shift;
3482
3483 if (vec[2] >= 0.f) {
3484 u_shift = ceilf(ew);
3485 } else {
3486 u_shift = 0;
3487 uf = ew - uf - 1.f;
3488 }
3489
3490 ui = floorf(uf);
3491 vi = floorf(vf);
3492
3493 *du = uf - ui;
3494 *dv = vf - vi;
3495
3496 for (int i = 0; i < 4; i++) {
3497 for (int j = 0; j < 4; j++) {
3498 us[i][j] = u_shift + av_clip(ui + j - 1, 0, ew - 1);
3499 vs[i][j] = av_clip( vi + i - 1, 0, height - 1);
3500 }
3501 }
3502
3503 return 1;
3504}
3505
3506/**
3507 * Calculate 3D coordinates on sphere for corresponding frame position in barrel facebook's format.
3508 *
3509 * @param s filter private context
3510 * @param i horizontal position on frame [0, width)
3511 * @param j vertical position on frame [0, height)
3512 * @param width frame width
3513 * @param height frame height
3514 * @param vec coordinates on sphere
3515 */
3516static int barrel_to_xyz(const V360Context *s,
3517 int i, int j, int width, int height,
3518 float *vec)
3519{
3520 const float scale = 0.99f;
3521 float l_x, l_y, l_z;
3522
3523 if (i < 4 * width / 5) {
3524 const float theta_range = M_PI_4;
3525
3526 const int ew = 4 * width / 5;
3527 const int eh = height;
3528
3529 const float phi = rescale(i, ew) * M_PI / scale;
3530 const float theta = rescale(j, eh) * theta_range / scale;
3531
3532 const float sin_phi = sinf(phi);
3533 const float cos_phi = cosf(phi);
3534 const float sin_theta = sinf(theta);
3535 const float cos_theta = cosf(theta);
3536
3537 l_x = cos_theta * sin_phi;
3538 l_y = sin_theta;
3539 l_z = cos_theta * cos_phi;
3540 } else {
3541 const int ew = width / 5;
3542 const int eh = height / 2;
3543
3544 float uf, vf;
3545
3546 if (j < eh) { // UP
3547 uf = rescale(i - 4 * ew, ew);
3548 vf = rescale(j, eh);
3549
3550 uf /= scale;
3551 vf /= scale;
3552
3553 l_x = uf;
3554 l_y = -1.f;
3555 l_z = vf;
3556 } else { // DOWN
3557 uf = rescale(i - 4 * ew, ew);
3558 vf = rescale(j - eh, eh);
3559
3560 uf /= scale;
3561 vf /= scale;
3562
3563 l_x = uf;
3564 l_y = 1.f;
3565 l_z = -vf;
3566 }
3567 }
3568
3569 vec[0] = l_x;
3570 vec[1] = l_y;
3571 vec[2] = l_z;
3572
3573 return 1;
3574}
3575
3576/**
3577 * Calculate frame position in barrel facebook's format for corresponding 3D coordinates on sphere.
3578 *
3579 * @param s filter private context
3580 * @param vec coordinates on sphere
3581 * @param width frame width
3582 * @param height frame height
3583 * @param us horizontal coordinates for interpolation window
3584 * @param vs vertical coordinates for interpolation window
3585 * @param du horizontal relative coordinate
3586 * @param dv vertical relative coordinate
3587 */
3588static int xyz_to_barrel(const V360Context *s,
3589 const float *vec, int width, int height,
3590 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
3591{
3592 const float scale = 0.99f;
3593
3594 const float phi = atan2f(vec[0], vec[2]);
3595 const float theta = asinf(vec[1]);
3596 const float theta_range = M_PI_4;
3597
3598 int ew, eh;
3599 int u_shift, v_shift;
3600 float uf, vf;
3601 int ui, vi;
3602
3603 if (theta > -theta_range && theta < theta_range) {
3604 ew = 4 * width / 5;
3605 eh = height;
3606
3607 u_shift = 0;
3608 v_shift = 0;
3609
3610 uf = (phi / M_PI * scale + 1.f) * ew / 2.f;
3611 vf = (theta / theta_range * scale + 1.f) * eh / 2.f;
3612 } else {
3613 ew = width / 5;
3614 eh = height / 2;
3615
3616 u_shift = 4 * ew;
3617
3618 if (theta < 0.f) { // UP
3619 uf = -vec[0] / vec[1];
3620 vf = -vec[2] / vec[1];
3621 v_shift = 0;
3622 } else { // DOWN
3623 uf = vec[0] / vec[1];
3624 vf = -vec[2] / vec[1];
3625 v_shift = eh;
3626 }
3627
3628 uf = 0.5f * ew * (uf * scale + 1.f);
3629 vf = 0.5f * eh * (vf * scale + 1.f);
3630 }
3631
3632 ui = floorf(uf);
3633 vi = floorf(vf);
3634
3635 *du = uf - ui;
3636 *dv = vf - vi;
3637
3638 for (int i = 0; i < 4; i++) {
3639 for (int j = 0; j < 4; j++) {
3640 us[i][j] = u_shift + av_clip(ui + j - 1, 0, ew - 1);
3641 vs[i][j] = v_shift + av_clip(vi + i - 1, 0, eh - 1);
3642 }
3643 }
3644
3645 return 1;
3646}
3647
3648/**
3649 * Calculate frame position in barrel split facebook's format for corresponding 3D coordinates on sphere.
3650 *
3651 * @param s filter private context
3652 * @param vec coordinates on sphere
3653 * @param width frame width
3654 * @param height frame height
3655 * @param us horizontal coordinates for interpolation window
3656 * @param vs vertical coordinates for interpolation window
3657 * @param du horizontal relative coordinate
3658 * @param dv vertical relative coordinate
3659 */
3660static int xyz_to_barrelsplit(const V360Context *s,
3661 const float *vec, int width, int height,
3662 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
3663{
3664 const float phi = atan2f(vec[0], vec[2]);
3665 const float theta = asinf(vec[1]);
3666
3667 const float theta_range = M_PI_4;
3668
3669 int ew, eh;
3670 int u_shift, v_shift;
3671 float uf, vf;
3672 int ui, vi;
3673
3674 if (theta >= -theta_range && theta <= theta_range) {
3675 const float scalew = s->fin_pad > 0 ? 1.f - s->fin_pad / (width * 2.f / 3.f) : 1.f - s->in_pad;
3676 const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (height / 2.f) : 1.f - s->in_pad;
3677
3678 ew = width / 3 * 2;
3679 eh = height / 2;
3680
3681 u_shift = 0;
3682 v_shift = phi >= M_PI_2 || phi < -M_PI_2 ? eh : 0;
3683
3684 uf = fmodf(phi, M_PI_2) / M_PI_2;
3685 vf = theta / M_PI_4;
3686
3687 if (v_shift)
3688 uf = uf >= 0.f ? fmodf(uf - 1.f, 1.f) : fmodf(uf + 1.f, 1.f);
3689
3690 uf = (uf * scalew + 1.f) * width / 3.f;
3691 vf = (vf * scaleh + 1.f) * height / 4.f;
3692 } else {
3693 const float scalew = s->fin_pad > 0 ? 1.f - s->fin_pad / (width / 3.f) : 1.f - s->in_pad;
3694 const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (height / 4.f) : 1.f - s->in_pad;
3695
3696 ew = width / 3;
3697 eh = height / 4;
3698
3699 u_shift = 2 * ew;
3700
3701 uf = vec[0] / vec[1] * scalew;
3702 vf = vec[2] / vec[1] * scaleh;
3703
3704 if (theta <= 0.f && theta >= -M_PI_2 &&
3705 phi <= M_PI_2 && phi >= -M_PI_2) {
3706 // front top
3707 uf *= -1.0f;
3708 vf = -(vf + 1.f) * scaleh + 1.f;
3709 v_shift = 0;
3710 } else if (theta >= 0.f && theta <= M_PI_2 &&
3711 phi <= M_PI_2 && phi >= -M_PI_2) {
3712 // front bottom
3713 vf = -(vf - 1.f) * scaleh;
3714 v_shift = height * 0.25f;
3715 } else if (theta <= 0.f && theta >= -M_PI_2) {
3716 // back top
3717 vf = (vf - 1.f) * scaleh + 1.f;
3718 v_shift = height * 0.5f;
3719 } else {
3720 // back bottom
3721 uf *= -1.0f;
3722 vf = (vf + 1.f) * scaleh;
3723 v_shift = height * 0.75f;
3724 }
3725
3726 uf = 0.5f * width / 3.f * (uf + 1.f);
3727 vf *= height * 0.25f;
3728 }
3729
3730 ui = floorf(uf);
3731 vi = floorf(vf);
3732
3733 *du = uf - ui;
3734 *dv = vf - vi;
3735
3736 for (int i = 0; i < 4; i++) {
3737 for (int j = 0; j < 4; j++) {
3738 us[i][j] = u_shift + av_clip(ui + j - 1, 0, ew - 1);
3739 vs[i][j] = v_shift + av_clip(vi + i - 1, 0, eh - 1);
3740 }
3741 }
3742
3743 return 1;
3744}
3745
3746/**
3747 * Calculate 3D coordinates on sphere for corresponding frame position in barrel split facebook's format.
3748 *
3749 * @param s filter private context
3750 * @param i horizontal position on frame [0, width)
3751 * @param j vertical position on frame [0, height)
3752 * @param width frame width
3753 * @param height frame height
3754 * @param vec coordinates on sphere
3755 */
3756static int barrelsplit_to_xyz(const V360Context *s,
3757 int i, int j, int width, int height,
3758 float *vec)
3759{
3760 const float x = (i + 0.5f) / width;
3761 const float y = (j + 0.5f) / height;
3762 float l_x, l_y, l_z;
3763 int ret;
3764
3765 if (x < 2.f / 3.f) {
3766 const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (width * 2.f / 3.f) : 1.f - s->out_pad;
3767 const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 2.f) : 1.f - s->out_pad;
3768
3769 const float back = floorf(y * 2.f);
3770
3771 const float phi = ((3.f / 2.f * x - 0.5f) / scalew - back) * M_PI;
3772 const float theta = (y - 0.25f - 0.5f * back) / scaleh * M_PI;
3773
3774 const float sin_phi = sinf(phi);
3775 const float cos_phi = cosf(phi);
3776 const float sin_theta = sinf(theta);
3777 const float cos_theta = cosf(theta);
3778
3779 l_x = cos_theta * sin_phi;
3780 l_y = sin_theta;
3781 l_z = cos_theta * cos_phi;
3782
3783 ret = 1;
3784 } else {
3785 const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (width / 3.f) : 1.f - s->out_pad;
3786 const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 4.f) : 1.f - s->out_pad;
3787
3788 const float facef = floorf(y * 4.f);
3789 const int face = facef;
3790 const float dir_vert = (face == 1 || face == 3) ? 1.0f : -1.0f;
3791 float uf, vf;
3792
3793 uf = x * 3.f - 2.f;
3794
3795 switch (face) {
3796 case 0: // front top
3797 case 1: // front bottom
3798 uf = 1.f - uf;
3799 vf = (0.5f - 2.f * y) / scaleh + facef;
3800 break;
3801 case 2: // back top
3802 case 3: // back bottom
3803 vf = (y * 2.f - 1.5f) / scaleh + 3.f - facef;
3804 break;
3805 default:
3806 av_assert0(0);
3807 }
3808 l_x = (0.5f - uf) / scalew;
3809 l_y = 0.5f * dir_vert;
3810 l_z = (vf - 0.5f) * dir_vert / scaleh;
3811 ret = (l_x * l_x * scalew * scalew + l_z * l_z * scaleh * scaleh) < 0.5f * 0.5f;
3812 }
3813
3814 vec[0] = l_x;
3815 vec[1] = l_y;
3816 vec[2] = l_z;
3817
3818 return ret;
3819}
3820
3821/**
3822 * Calculate 3D coordinates on sphere for corresponding frame position in tspyramid format.
3823 *
3824 * @param s filter private context
3825 * @param i horizontal position on frame [0, width)
3826 * @param j vertical position on frame [0, height)
3827 * @param width frame width
3828 * @param height frame height
3829 * @param vec coordinates on sphere
3830 */
3831static int tspyramid_to_xyz(const V360Context *s,
3832 int i, int j, int width, int height,
3833 float *vec)
3834{
3835 const float x = (i + 0.5f) / width;
3836 const float y = (j + 0.5f) / height;
3837
3838 if (x < 0.5f) {
3839 vec[0] = x * 4.f - 1.f;
3840 vec[1] = (y * 2.f - 1.f);
3841 vec[2] = 1.f;
3842 } else if (x >= 0.6875f && x < 0.8125f &&
3843 y >= 0.375f && y < 0.625f) {
3844 vec[0] = -(x - 0.6875f) * 16.f + 1.f;
3845 vec[1] = (y - 0.375f) * 8.f - 1.f;
3846 vec[2] = -1.f;
3847 } else if (0.5f <= x && x < 0.6875f &&
3848 ((0.f <= y && y < 0.375f && y >= 2.f * (x - 0.5f)) ||
3849 (0.375f <= y && y < 0.625f) ||
3850 (0.625f <= y && y < 1.f && y <= 2.f * (1.f - x)))) {
3851 vec[0] = 1.f;
3852 vec[1] = 2.f * (y - 2.f * x + 1.f) / (3.f - 4.f * x) - 1.f;
3853 vec[2] = -2.f * (x - 0.5f) / 0.1875f + 1.f;
3854 } else if (0.8125f <= x && x < 1.f &&
3855 ((0.f <= y && y < 0.375f && x >= (1.f - y / 2.f)) ||
3856 (0.375f <= y && y < 0.625f) ||
3857 (0.625f <= y && y < 1.f && y <= (2.f * x - 1.f)))) {
3858 vec[0] = -1.f;
3859 vec[1] = 2.f * (y + 2.f * x - 2.f) / (4.f * x - 3.f) - 1.f;
3860 vec[2] = 2.f * (x - 0.8125f) / 0.1875f - 1.f;
3861 } else if (0.f <= y && y < 0.375f &&
3862 ((0.5f <= x && x < 0.8125f && y < 2.f * (x - 0.5f)) ||
3863 (0.6875f <= x && x < 0.8125f) ||
3864 (0.8125f <= x && x < 1.f && x < (1.f - y / 2.f)))) {
3865 vec[0] = 2.f * (1.f - x - 0.5f * y) / (0.5f - y) - 1.f;
3866 vec[1] = -1.f;
3867 vec[2] = 2.f * (0.375f - y) / 0.375f - 1.f;
3868 } else {
3869 vec[0] = 2.f * (0.5f - x + 0.5f * y) / (y - 0.5f) - 1.f;
3870 vec[1] = 1.f;
3871 vec[2] = -2.f * (1.f - y) / 0.375f + 1.f;
3872 }
3873
3874 return 1;
3875}
3876
3877/**
3878 * Calculate frame position in tspyramid format for corresponding 3D coordinates on sphere.
3879 *
3880 * @param s filter private context
3881 * @param vec coordinates on sphere
3882 * @param width frame width
3883 * @param height frame height
3884 * @param us horizontal coordinates for interpolation window
3885 * @param vs vertical coordinates for interpolation window
3886 * @param du horizontal relative coordinate
3887 * @param dv vertical relative coordinate
3888 */
3889static int xyz_to_tspyramid(const V360Context *s,
3890 const float *vec, int width, int height,
3891 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
3892{
3893 float uf, vf;
3894 int ui, vi;
3895 int face;
3896
3897 xyz_to_cube(s, vec, &uf, &vf, &face);
3898
3899 uf = (uf + 1.f) * 0.5f;
3900 vf = (vf + 1.f) * 0.5f;
3901
3902 switch (face) {
3903 case UP:
3904 uf = 0.1875f * vf - 0.375f * uf * vf - 0.125f * uf + 0.8125f;
3905 vf = 0.375f - 0.375f * vf;
3906 break;
3907 case FRONT:
3908 uf = 0.5f * uf;
3909 break;
3910 case DOWN:
3911 uf = 1.f - 0.1875f * vf - 0.5f * uf + 0.375f * uf * vf;
3912 vf = 1.f - 0.375f * vf;
3913 break;
3914 case LEFT:
3915 vf = 0.25f * vf + 0.75f * uf * vf - 0.375f * uf + 0.375f;
3916 uf = 0.1875f * uf + 0.8125f;
3917 break;
3918 case RIGHT:
3919 vf = 0.375f * uf - 0.75f * uf * vf + vf;
3920 uf = 0.1875f * uf + 0.5f;
3921 break;
3922 case BACK:
3923 uf = 0.125f * uf + 0.6875f;
3924 vf = 0.25f * vf + 0.375f;
3925 break;
3926 }
3927
3928 uf *= width;
3929 vf *= height;
3930
3931 ui = floorf(uf);
3932 vi = floorf(vf);
3933
3934 *du = uf - ui;
3935 *dv = vf - vi;
3936
3937 for (int i = 0; i < 4; i++) {
3938 for (int j = 0; j < 4; j++) {
3939 us[i][j] = reflectx(ui + j - 1, vi + i - 1, width, height);
3940 vs[i][j] = reflecty(vi + i - 1, height);
3941 }
3942 }
3943
3944 return 1;
3945}
3946
3947/**
3948 * Calculate 3D coordinates on sphere for corresponding frame position in octahedron format.
3949 *
3950 * @param s filter private context
3951 * @param i horizontal position on frame [0, width)
3952 * @param j vertical position on frame [0, height)
3953 * @param width frame width
3954 * @param height frame height
3955 * @param vec coordinates on sphere
3956 */
3957static int octahedron_to_xyz(const V360Context *s,
3958 int i, int j, int width, int height,
3959 float *vec)
3960{
3961 const float x = rescale(i, width);
3962 const float y = rescale(j, height);
3963 const float ax = fabsf(x);
3964 const float ay = fabsf(y);
3965
3966 vec[2] = 1.f - (ax + ay);
3967 if (ax + ay > 1.f) {
3968 vec[0] = (1.f - ay) * FFSIGN(x);
3969 vec[1] = (1.f - ax) * FFSIGN(y);
3970 } else {
3971 vec[0] = x;
3972 vec[1] = y;
3973 }
3974
3975 return 1;
3976}
3977
3978/**
3979 * Calculate frame position in octahedron format for corresponding 3D coordinates on sphere.
3980 *
3981 * @param s filter private context
3982 * @param vec coordinates on sphere
3983 * @param width frame width
3984 * @param height frame height
3985 * @param us horizontal coordinates for interpolation window
3986 * @param vs vertical coordinates for interpolation window
3987 * @param du horizontal relative coordinate
3988 * @param dv vertical relative coordinate
3989 */
3990static int xyz_to_octahedron(const V360Context *s,
3991 const float *vec, int width, int height,
3992 int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
3993{
3994 float uf, vf, zf;
3995 int ui, vi;
3996 float div = fabsf(vec[0]) + fabsf(vec[1]) + fabsf(vec[2]);
3997
3998 uf = vec[0] / div;
3999 vf = vec[1] / div;
4000 zf = vec[2];
4001
4002 if (zf < 0.f) {
4003 zf = vf;
4004 vf = (1.f - fabsf(uf)) * FFSIGN(zf);
4005 uf = (1.f - fabsf(zf)) * FFSIGN(uf);
4006 }
4007
4008 uf = scale(uf, width);
4009 vf = scale(vf, height);
4010
4011 ui = floorf(uf);
4012 vi = floorf(vf);
4013
4014 *du = uf - ui;
4015 *dv = vf - vi;
4016
4017 for (int i = 0; i < 4; i++) {
4018 for (int j = 0; j < 4; j++) {
4019 us[i][j] = av_clip(ui + j - 1, 0, width - 1);
4020 vs[i][j] = av_clip(vi + i - 1, 0, height - 1);
4021 }
4022 }
4023
4024 return 1;
4025}
4026
4027static void multiply_quaternion(float c[4], const float a[4], const float b[4])
4028{
4029 c[0] = a[0] * b[0] - a[1] * b[1] - a[2] * b[2] - a[3] * b[3];
4030 c[1] = a[1] * b[0] + a[0] * b[1] + a[2] * b[3] - a[3] * b[2];
4031 c[2] = a[2] * b[0] + a[0] * b[2] + a[3] * b[1] - a[1] * b[3];
4032 c[3] = a[3] * b[0] + a[0] * b[3] + a[1] * b[2] - a[2] * b[1];
4033}
4034
4035static void conjugate_quaternion(float d[4], const float q[4])
4036{
4037 d[0] = q[0];
4038 d[1] = -q[1];
4039 d[2] = -q[2];
4040 d[3] = -q[3];
4041}
4042
4043/**
4044 * Calculate rotation quaternion for yaw/pitch/roll angles.
4045 */
4046static inline void calculate_rotation(float yaw, float pitch, float roll,
4047 float rot_quaternion[2][4],
4048 const int rotation_order[3])
4049{
4050 const float yaw_rad = yaw * M_PI / 180.f;
4051 const float pitch_rad = pitch * M_PI / 180.f;
4052 const float roll_rad = roll * M_PI / 180.f;
4053
4054 const float sin_yaw = sinf(yaw_rad * 0.5f);
4055 const float cos_yaw = cosf(yaw_rad * 0.5f);
4056 const float sin_pitch = sinf(pitch_rad * 0.5f);
4057 const float cos_pitch = cosf(pitch_rad * 0.5f);
4058 const float sin_roll = sinf(roll_rad * 0.5f);
4059 const float cos_roll = cosf(roll_rad * 0.5f);
4060
4061 float m[3][4];
4062 float tmp[2][4];
4063
4064 m[0][0] = cos_yaw; m[0][1] = 0.f; m[0][2] = sin_yaw; m[0][3] = 0.f;
4065 m[1][0] = cos_pitch; m[1][1] = sin_pitch; m[1][2] = 0.f; m[1][3] = 0.f;
4066 m[2][0] = cos_roll; m[2][1] = 0.f; m[2][2] = 0.f; m[2][3] = sin_roll;
4067
4068 multiply_quaternion(tmp[0], rot_quaternion[0], m[rotation_order[0]]);
4069 multiply_quaternion(tmp[1], tmp[0], m[rotation_order[1]]);
4070 multiply_quaternion(rot_quaternion[0], tmp[1], m[rotation_order[2]]);
4071
4072 conjugate_quaternion(rot_quaternion[1], rot_quaternion[0]);
4073}
4074
4075/**
4076 * Rotate vector with given rotation quaternion.
4077 *
4078 * @param rot_quaternion rotation quaternion
4079 * @param vec vector
4080 */
4081static inline void rotate(const float rot_quaternion[2][4],
4082 float *vec)
4083{
4084 float qv[4], temp[4], rqv[4];
4085
4086 qv[0] = 0.f;
4087 qv[1] = vec[0];
4088 qv[2] = vec[1];
4089 qv[3] = vec[2];
4090
4091 multiply_quaternion(temp, rot_quaternion[0], qv);
4092 multiply_quaternion(rqv, temp, rot_quaternion[1]);
4093
4094 vec[0] = rqv[1];
4095 vec[1] = rqv[2];
4096 vec[2] = rqv[3];
4097}
4098
4099static inline void set_mirror_modifier(int h_flip, int v_flip, int d_flip,
4100 float *modifier)
4101{
4102 modifier[0] = h_flip ? -1.f : 1.f;
4103 modifier[1] = v_flip ? -1.f : 1.f;
4104 modifier[2] = d_flip ? -1.f : 1.f;
4105}
4106
4107static inline void mirror(const float *modifier, float *vec)
4108{
4109 vec[0] *= modifier[0];
4110 vec[1] *= modifier[1];
4111 vec[2] *= modifier[2];
4112}
4113
4114static inline void input_flip(int16_t u[4][4], int16_t v[4][4], int w, int h, int hflip, int vflip)
4115{
4116 if (hflip) {
4117 for (int i = 0; i < 4; i++) {
4118 for (int j = 0; j < 4; j++)
4119 u[i][j] = w - 1 - u[i][j];
4120 }
4121 }
4122
4123 if (vflip) {
4124 for (int i = 0; i < 4; i++) {
4125 for (int j = 0; j < 4; j++)
4126 v[i][j] = h - 1 - v[i][j];
4127 }
4128 }
4129}
4130
4131static int allocate_plane(V360Context *s, int sizeof_uv, int sizeof_ker, int sizeof_mask, int p)
4132{
4133 const int pr_height = s->pr_height[p];
4134
4135 for (int n = 0; n < s->nb_threads; n++) {
4136 SliceXYRemap *r = &s->slice_remap[n];
4137 const int slice_start = (pr_height * n ) / s->nb_threads;
4138 const int slice_end = (pr_height * (n + 1)) / s->nb_threads;
4139 const int height = slice_end - slice_start;
4140
4141 if (!r->u[p])
4142 r->u[p] = av_calloc(s->uv_linesize[p] * height, sizeof_uv);
4143 if (!r->v[p])
4144 r->v[p] = av_calloc(s->uv_linesize[p] * height, sizeof_uv);
4145 if (!r->u[p] || !r->v[p])
4146 return AVERROR(ENOMEM);
4147 if (sizeof_ker) {
4148 if (!r->ker[p])
4149 r->ker[p] = av_calloc(s->uv_linesize[p] * height, sizeof_ker);
4150 if (!r->ker[p])
4151 return AVERROR(ENOMEM);
4152 }
4153
4154 if (sizeof_mask && !p) {
4155 if (!r->mask)
4156 r->mask = av_calloc(s->pr_width[p] * height, sizeof_mask);
4157 if (!r->mask)
4158 return AVERROR(ENOMEM);
4159 }
4160 }
4161
4162 return 0;
4163}
4164
4165static void fov_from_dfov(int format, float d_fov, float w, float h, float *h_fov, float *v_fov)
4166{
4167 switch (format) {
4168 case EQUIRECTANGULAR:
4169 *h_fov = d_fov;
4170 *v_fov = d_fov * 0.5f;
4171 break;
4172 case ORTHOGRAPHIC:
4173 {
4174 const float d = 0.5f * hypotf(w, h);
4175 const float l = sinf(d_fov * M_PI / 360.f) / d;
4176
4177 *h_fov = asinf(w * 0.5f * l) * 360.f / M_PI;
4178 *v_fov = asinf(h * 0.5f * l) * 360.f / M_PI;
4179
4180 if (d_fov > 180.f) {
4181 *h_fov = 180.f - *h_fov;
4182 *v_fov = 180.f - *v_fov;
4183 }
4184 }
4185 break;
4186 case EQUISOLID:
4187 {
4188 const float d = 0.5f * hypotf(w, h);
4189 const float l = d / (sinf(d_fov * M_PI / 720.f));
4190
4191 *h_fov = 2.f * asinf(w * 0.5f / l) * 360.f / M_PI;
4192 *v_fov = 2.f * asinf(h * 0.5f / l) * 360.f / M_PI;
4193 }
4194 break;
4195 case STEREOGRAPHIC:
4196 {
4197 const float d = 0.5f * hypotf(w, h);
4198 const float l = d / (tanf(d_fov * M_PI / 720.f));
4199
4200 *h_fov = 2.f * atan2f(w * 0.5f, l) * 360.f / M_PI;
4201 *v_fov = 2.f * atan2f(h * 0.5f, l) * 360.f / M_PI;
4202 }
4203 break;
4204 case DUAL_FISHEYE:
4205 {
4206 const float d = hypotf(w * 0.5f, h);
4207
4208 *h_fov = 0.5f * w / d * d_fov;
4209 *v_fov = h / d * d_fov;
4210 }
4211 break;
4212 case FISHEYE:
4213 {
4214 const float d = hypotf(w, h);
4215
4216 *h_fov = w / d * d_fov;
4217 *v_fov = h / d * d_fov;
4218 }
4219 break;
4220 case FLAT:
4221 default:
4222 {
4223 const float da = tanf(0.5f * FFMIN(d_fov, 359.f) * M_PI / 180.f);
4224 const float d = hypotf(w, h);
4225
4226 *h_fov = atan2f(da * w, d) * 360.f / M_PI;
4227 *v_fov = atan2f(da * h, d) * 360.f / M_PI;
4228
4229 if (*h_fov < 0.f)
4230 *h_fov += 360.f;
4231 if (*v_fov < 0.f)
4232 *v_fov += 360.f;
4233 }
4234 break;
4235 }
4236}
4237
4238static void set_dimensions(int *outw, int *outh, int w, int h, const AVPixFmtDescriptor *desc)
4239{
4240 outw[1] = outw[2] = AV_CEIL_RSHIFT(w, desc->log2_chroma_w);
4241 outw[0] = outw[3] = w;
4242 outh[1] = outh[2] = AV_CEIL_RSHIFT(h, desc->log2_chroma_h);
4243 outh[0] = outh[3] = h;
4244}
4245
4246// Calculate remap data
4247static int v360_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
4248{
4249 V360Context *s = ctx->priv;
4250 SliceXYRemap *r = &s->slice_remap[jobnr];
4251
4252 for (int p = 0; p < s->nb_allocated; p++) {
4253 const int max_value = s->max_value;
4254 const int width = s->pr_width[p];
4255 const int uv_linesize = s->uv_linesize[p];
4256 const int height = s->pr_height[p];
4257 const int in_width = s->inplanewidth[p];
4258 const int in_height = s->inplaneheight[p];
4259 const int slice_start = ff_slice_pos(height, jobnr, nb_jobs);
4260 const int slice_end = ff_slice_pos(height, jobnr + 1, nb_jobs);
4261 const int elements = s->elements;
4262 float du, dv;
4263 float vec[3];
4264 XYRemap rmap;
4265
4266 for (int j = slice_start; j < slice_end; j++) {
4267 for (int i = 0; i < width; i++) {
4268 int16_t *u = r->u[p] + ((j - slice_start) * (int64_t)uv_linesize + i) * elements;
4269 int16_t *v = r->v[p] + ((j - slice_start) * (int64_t)uv_linesize + i) * elements;
4270 int16_t *ker = r->ker[p] + ((j - slice_start) * (int64_t)uv_linesize + i) * elements;
4271 uint8_t *mask8 = (p || !r->mask) ? NULL : r->mask + ((j - slice_start) * s->pr_width[0] + i);
4272 uint16_t *mask16 = (p || !r->mask) ? NULL : (uint16_t *)r->mask + ((j - slice_start) * s->pr_width[0] + i);
4273 int in_mask, out_mask;
4274
4275 if (s->out_transpose)
4276 out_mask = s->out_transform(s, j, i, height, width, vec);
4277 else
4278 out_mask = s->out_transform(s, i, j, width, height, vec);
4279 if (!isfinite(vec[0]) || !isfinite(vec[1]) || !isfinite(vec[2])) {
4280 vec[0] = vec[1] = 0.f;
4281 vec[2] = 1.f;
4282 }
4283 offset_vector(vec, s->h_offset, s->v_offset);
4284 normalize_vector(vec);
4285 av_assert1(!isnan(vec[0]) && !isnan(vec[1]) && !isnan(vec[2]));
4286 rotate(s->rot_quaternion, vec);
4287 av_assert1(!isnan(vec[0]) && !isnan(vec[1]) && !isnan(vec[2]));
4288 normalize_vector(vec);
4289 mirror(s->output_mirror_modifier, vec);
4290 if (s->in_transpose)
4291 in_mask = s->in_transform(s, vec, in_height, in_width, rmap.v, rmap.u, &du, &dv);
4292 else
4293 in_mask = s->in_transform(s, vec, in_width, in_height, rmap.u, rmap.v, &du, &dv);
4294 input_flip(rmap.u, rmap.v, in_width, in_height, s->ih_flip, s->iv_flip);
4295 av_assert1(!isnan(du) && !isnan(dv));
4296 s->calculate_kernel(du, dv, &rmap, u, v, ker);
4297
4298 if (!p && r->mask) {
4299 if (s->mask_size == 1) {
4300 mask8[0] = 255 * (out_mask & in_mask);
4301 } else {
4302 mask16[0] = max_value * (out_mask & in_mask);
4303 }
4304 }
4305 }
4306 }
4307 }
4308
4309 return 0;
4310}
4311
4312static int get_output_dimension(AVFilterContext *ctx, const char *name,
4313 float val, int *dim)
4314{
4315 if (!isfinite(val) || val < 1.f || val > INT16_MAX) {
4316 av_log(ctx, AV_LOG_ERROR,
4317 "Output %s %g is outside the allowed range [1, %d].\n",
4318 name, val, INT16_MAX);
4319 return AVERROR(EINVAL);
4320 }
4321
4322 *dim = lrintf(val);
4323 return 0;
4324}
4325
4326static void projection_min_size(int projection, int *min_w, int *min_h)
4327{
4328 switch (projection) {
4329 case CUBEMAP_3_2: *min_w = 3; *min_h = 2; break;
4330 case CUBEMAP_1_6: *min_w = 1; *min_h = 6; break;
4331 case CUBEMAP_6_1: *min_w = 6; *min_h = 1; break;
4332 case EQUIANGULAR: *min_w = 5; *min_h = 9; break;
4333 case BARREL: *min_w = 5; *min_h = 2; break;
4334 case BARREL_SPLIT: *min_w = 3; *min_h = 4; break;
4335 case DUAL_FISHEYE: *min_w = 2; *min_h = 1; break;
4336 default: *min_w = 1; *min_h = 1; break;
4337 }
4338}
4339
4340static int config_output(AVFilterLink *outlink)
4341{
4342 AVFilterContext *ctx = outlink->src;
4343 AVFilterLink *inlink = ctx->inputs[0];
4344 V360Context *s = ctx->priv;
4345 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
4346 const int depth = desc->comp[0].depth;
4347 const int sizeof_mask = s->mask_size = (depth + 7) >> 3;
4348 float default_h_fov = 360.f;
4349 float default_v_fov = 180.f;
4350 float default_ih_fov = 360.f;
4351 float default_iv_fov = 180.f;
4352 int sizeof_uv;
4353 int sizeof_ker;
4354 int err;
4355 int h, w;
4356 int in_offset_h, in_offset_w;
4357 int out_offset_h, out_offset_w;
4358 float hf, wf;
4359 int (*prepare_out)(AVFilterContext *ctx);
4360 int have_alpha;
4361
4362 s->max_value = (1 << depth) - 1;
4363
4364 switch (s->interp) {
4365 case NEAREST:
4366 s->calculate_kernel = nearest_kernel;
4367 s->remap_slice = depth <= 8 ? remap1_8bit_slice : remap1_16bit_slice;
4368 s->elements = 1;
4369 sizeof_uv = sizeof(int16_t) * s->elements;
4370 sizeof_ker = 0;
4371 break;
4372 case BILINEAR:
4373 s->calculate_kernel = bilinear_kernel;
4374 s->remap_slice = depth <= 8 ? remap2_8bit_slice : remap2_16bit_slice;
4375 s->elements = 2 * 2;
4376 sizeof_uv = sizeof(int16_t) * s->elements;
4377 sizeof_ker = sizeof(int16_t) * s->elements;
4378 break;
4379 case LAGRANGE9:
4380 s->calculate_kernel = lagrange_kernel;
4381 s->remap_slice = depth <= 8 ? remap3_8bit_slice : remap3_16bit_slice;
4382 s->elements = 3 * 3;
4383 sizeof_uv = sizeof(int16_t) * s->elements;
4384 sizeof_ker = sizeof(int16_t) * s->elements;
4385 break;
4386 case BICUBIC:
4387 s->calculate_kernel = bicubic_kernel;
4388 s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice;
4389 s->elements = 4 * 4;
4390 sizeof_uv = sizeof(int16_t) * s->elements;
4391 sizeof_ker = sizeof(int16_t) * s->elements;
4392 break;
4393 case LANCZOS:
4394 s->calculate_kernel = lanczos_kernel;
4395 s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice;
4396 s->elements = 4 * 4;
4397 sizeof_uv = sizeof(int16_t) * s->elements;
4398 sizeof_ker = sizeof(int16_t) * s->elements;
4399 break;
4400 case SPLINE16:
4401 s->calculate_kernel = spline16_kernel;
4402 s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice;
4403 s->elements = 4 * 4;
4404 sizeof_uv = sizeof(int16_t) * s->elements;
4405 sizeof_ker = sizeof(int16_t) * s->elements;
4406 break;
4407 case GAUSSIAN:
4408 s->calculate_kernel = gaussian_kernel;
4409 s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice;
4410 s->elements = 4 * 4;
4411 sizeof_uv = sizeof(int16_t) * s->elements;
4412 sizeof_ker = sizeof(int16_t) * s->elements;
4413 break;
4414 case MITCHELL:
4415 s->calculate_kernel = mitchell_kernel;
4416 s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice;
4417 s->elements = 4 * 4;
4418 sizeof_uv = sizeof(int16_t) * s->elements;
4419 sizeof_ker = sizeof(int16_t) * s->elements;
4420 break;
4421 default:
4422 av_assert0(0);
4423 }
4424
4425 ff_v360_init(s, depth);
4426
4427 for (int order = 0; order < NB_RORDERS; order++) {
4428 const char c = s->rorder[order];
4429 int rorder;
4430
4431 if (c == '\0') {
4432 av_log(ctx, AV_LOG_WARNING,
4433 "Incomplete rorder option. Direction for all 3 rotation orders should be specified. Switching to default rorder.\n");
4434 s->rotation_order[0] = YAW;
4435 s->rotation_order[1] = PITCH;
4436 s->rotation_order[2] = ROLL;
4437 break;
4438 }
4439
4440 rorder = get_rorder(c);
4441 if (rorder == -1) {
4442 av_log(ctx, AV_LOG_WARNING,
4443 "Incorrect rotation order symbol '%c' in rorder option. Switching to default rorder.\n", c);
4444 s->rotation_order[0] = YAW;
4445 s->rotation_order[1] = PITCH;
4446 s->rotation_order[2] = ROLL;
4447 break;
4448 }
4449
4450 s->rotation_order[order] = rorder;
4451 }
4452
4453 switch (s->in_stereo) {
4454 case STEREO_2D:
4455 w = inlink->w;
4456 h = inlink->h;
4457 in_offset_w = in_offset_h = 0;
4458 break;
4459 case STEREO_SBS:
4460 w = inlink->w / 2;
4461 h = inlink->h;
4462 in_offset_w = w;
4463 in_offset_h = 0;
4464 break;
4465 case STEREO_TB:
4466 w = inlink->w;
4467 h = inlink->h / 2;
4468 in_offset_w = 0;
4469 in_offset_h = h;
4470 break;
4471 default:
4472 av_unreachable("All valid cases are handled");
4473 }
4474
4475 set_dimensions(s->inplanewidth, s->inplaneheight, w, h, desc);
4476 set_dimensions(s->in_offset_w, s->in_offset_h, in_offset_w, in_offset_h, desc);
4477
4478 s->in_width = s->inplanewidth[0];
4479 s->in_height = s->inplaneheight[0];
4480
4481 switch (s->in) {
4482 case CYLINDRICAL:
4483 case FLAT:
4484 default_ih_fov = 90.f;
4485 default_iv_fov = 45.f;
4486 break;
4487 case EQUISOLID:
4488 case ORTHOGRAPHIC:
4489 case STEREOGRAPHIC:
4490 case DUAL_FISHEYE:
4491 case FISHEYE:
4492 default_ih_fov = 180.f;
4493 default_iv_fov = 180.f;
4494 break;
4495 default:
4496 break;
4497 }
4498
4499 if (s->ih_fov == 0.f)
4500 s->ih_fov = default_ih_fov;
4501
4502 if (s->iv_fov == 0.f)
4503 s->iv_fov = default_iv_fov;
4504
4505 if (s->id_fov > 0.f)
4506 fov_from_dfov(s->in, s->id_fov, w, h, &s->ih_fov, &s->iv_fov);
4507
4508 if (s->in_transpose)
4509 FFSWAP(int, s->in_width, s->in_height);
4510
4511 // The remap code stores input coordinates in int16_t
4512 if (s->in_width < 1 || s->in_width > INT16_MAX ||
4513 s->in_height < 1 || s->in_height > INT16_MAX) {
4514 av_log(ctx, AV_LOG_ERROR,
4515 "Input dimensions %dx%d are outside the allowed range [1, %d].\n",
4516 s->in_width, s->in_height, INT16_MAX);
4517 return AVERROR(EINVAL);
4518 }
4519
4520 {
4521 int min_w, min_h;
4522 const int pw = s->in_transpose ? AV_CEIL_RSHIFT(h, desc->log2_chroma_h)
4523 : AV_CEIL_RSHIFT(w, desc->log2_chroma_w);
4524 const int ph = s->in_transpose ? AV_CEIL_RSHIFT(w, desc->log2_chroma_w)
4525 : AV_CEIL_RSHIFT(h, desc->log2_chroma_h);
4526
4527 projection_min_size(s->in, &min_w, &min_h);
4528 if (pw < min_w || ph < min_h) {
4529 av_log(ctx, AV_LOG_ERROR,
4530 "Input %dx%d is too small for the input projection "
4531 "(requires at least %dx%d per plane).\n", pw, ph, min_w, min_h);
4532 return AVERROR(EINVAL);
4533 }
4534 }
4535
4536 switch (s->in) {
4537 case EQUIRECTANGULAR:
4538 s->in_transform = xyz_to_equirect;
4539 err = prepare_equirect_in(ctx);
4540 wf = w;
4541 hf = h;
4542 break;
4543 case CUBEMAP_3_2:
4544 s->in_transform = xyz_to_cube3x2;
4545 err = prepare_cube_in(ctx);
4546 wf = w / 3.f * 4.f;
4547 hf = h;
4548 break;
4549 case CUBEMAP_1_6:
4550 s->in_transform = xyz_to_cube1x6;
4551 err = prepare_cube_in(ctx);
4552 wf = w * 4.f;
4553 hf = h / 3.f;
4554 break;
4555 case CUBEMAP_6_1:
4556 s->in_transform = xyz_to_cube6x1;
4557 err = prepare_cube_in(ctx);
4558 wf = w / 3.f * 2.f;
4559 hf = h * 2.f;
4560 break;
4561 case EQUIANGULAR:
4562 s->in_transform = xyz_to_eac;
4563 err = prepare_eac_in(ctx);
4564 wf = w;
4565 hf = h / 9.f * 8.f;
4566 break;
4567 case FLAT:
4568 s->in_transform = xyz_to_flat;
4569 err = prepare_flat_in(ctx);
4570 wf = w;
4571 hf = h;
4572 break;
4573 case PERSPECTIVE:
4574 av_log(ctx, AV_LOG_ERROR, "Supplied format is not accepted as input.\n");
4575 return AVERROR(EINVAL);
4576 case DUAL_FISHEYE:
4577 s->in_transform = xyz_to_dfisheye;
4578 err = prepare_dfisheye_in(ctx);
4579 wf = w;
4580 hf = h;
4581 break;
4582 case BARREL:
4583 s->in_transform = xyz_to_barrel;
4584 err = 0;
4585 wf = w / 5.f * 4.f;
4586 hf = h;
4587 break;
4588 case STEREOGRAPHIC:
4589 s->in_transform = xyz_to_stereographic;
4590 err = prepare_stereographic_in(ctx);
4591 wf = w;
4592 hf = h / 2.f;
4593 break;
4594 case MERCATOR:
4595 s->in_transform = xyz_to_mercator;
4596 err = 0;
4597 wf = w;
4598 hf = h / 2.f;
4599 break;
4600 case BALL:
4601 s->in_transform = xyz_to_ball;
4602 err = 0;
4603 wf = w;
4604 hf = h / 2.f;
4605 break;
4606 case HAMMER:
4607 s->in_transform = xyz_to_hammer;
4608 err = 0;
4609 wf = w;
4610 hf = h;
4611 break;
4612 case SINUSOIDAL:
4613 s->in_transform = xyz_to_sinusoidal;
4614 err = 0;
4615 wf = w;
4616 hf = h;
4617 break;
4618 case FISHEYE:
4619 s->in_transform = xyz_to_fisheye;
4620 err = prepare_fisheye_in(ctx);
4621 wf = w * 2;
4622 hf = h;
4623 break;
4624 case PANNINI:
4625 s->in_transform = xyz_to_pannini;
4626 err = 0;
4627 wf = w;
4628 hf = h;
4629 break;
4630 case CYLINDRICAL:
4631 s->in_transform = xyz_to_cylindrical;
4632 err = prepare_cylindrical_in(ctx);
4633 wf = w;
4634 hf = h * 2.f;
4635 break;
4636 case CYLINDRICALEA:
4637 s->in_transform = xyz_to_cylindricalea;
4638 err = prepare_cylindricalea_in(ctx);
4639 wf = w;
4640 hf = h;
4641 break;
4642 case TETRAHEDRON:
4643 s->in_transform = xyz_to_tetrahedron;
4644 err = 0;
4645 wf = w;
4646 hf = h;
4647 break;
4648 case BARREL_SPLIT:
4649 s->in_transform = xyz_to_barrelsplit;
4650 err = 0;
4651 wf = w * 4.f / 3.f;
4652 hf = h;
4653 break;
4654 case TSPYRAMID:
4655 s->in_transform = xyz_to_tspyramid;
4656 err = 0;
4657 wf = w;
4658 hf = h;
4659 break;
4660 case HEQUIRECTANGULAR:
4661 s->in_transform = xyz_to_hequirect;
4662 err = 0;
4663 wf = w * 2.f;
4664 hf = h;
4665 break;
4666 case EQUISOLID:
4667 s->in_transform = xyz_to_equisolid;
4668 err = prepare_equisolid_in(ctx);
4669 wf = w;
4670 hf = h / 2.f;
4671 break;
4672 case ORTHOGRAPHIC:
4673 s->in_transform = xyz_to_orthographic;
4674 err = prepare_orthographic_in(ctx);
4675 wf = w;
4676 hf = h / 2.f;
4677 break;
4678 case OCTAHEDRON:
4679 s->in_transform = xyz_to_octahedron;
4680 err = 0;
4681 wf = w;
4682 hf = h / 2.f;
4683 break;
4684 default:
4685 av_log(ctx, AV_LOG_ERROR, "Specified input format is not handled.\n");
4686 return AVERROR_BUG;
4687 }
4688
4689 if (err != 0) {
4690 return err;
4691 }
4692
4693 switch (s->out) {
4694 case EQUIRECTANGULAR:
4695 s->out_transform = equirect_to_xyz;
4696 prepare_out = prepare_equirect_out;
4697 w = lrintf(wf);
4698 h = lrintf(hf);
4699 break;
4700 case CUBEMAP_3_2:
4701 s->out_transform = cube3x2_to_xyz;
4702 prepare_out = prepare_cube_out;
4703 w = lrintf(wf / 4.f * 3.f);
4704 h = lrintf(hf);
4705 break;
4706 case CUBEMAP_1_6:
4707 s->out_transform = cube1x6_to_xyz;
4708 prepare_out = prepare_cube_out;
4709 w = lrintf(wf / 4.f);
4710 h = lrintf(hf * 3.f);
4711 break;
4712 case CUBEMAP_6_1:
4713 s->out_transform = cube6x1_to_xyz;
4714 prepare_out = prepare_cube_out;
4715 w = lrintf(wf / 2.f * 3.f);
4716 h = lrintf(hf / 2.f);
4717 break;
4718 case EQUIANGULAR:
4719 s->out_transform = eac_to_xyz;
4720 prepare_out = prepare_eac_out;
4721 w = lrintf(wf);
4722 h = lrintf(hf / 8.f * 9.f);
4723 break;
4724 case FLAT:
4725 s->out_transform = flat_to_xyz;
4726 prepare_out = prepare_flat_out;
4727 w = lrintf(wf);
4728 h = lrintf(hf);
4729 break;
4730 case DUAL_FISHEYE:
4731 s->out_transform = dfisheye_to_xyz;
4732 prepare_out = prepare_fisheye_out;
4733 w = lrintf(wf);
4734 h = lrintf(hf);
4735 break;
4736 case BARREL:
4737 s->out_transform = barrel_to_xyz;
4738 prepare_out = NULL;
4739 w = lrintf(wf / 4.f * 5.f);
4740 h = lrintf(hf);
4741 break;
4742 case STEREOGRAPHIC:
4743 s->out_transform = stereographic_to_xyz;
4744 prepare_out = prepare_stereographic_out;
4745 w = lrintf(wf);
4746 h = lrintf(hf * 2.f);
4747 break;
4748 case MERCATOR:
4749 s->out_transform = mercator_to_xyz;
4750 prepare_out = NULL;
4751 w = lrintf(wf);
4752 h = lrintf(hf * 2.f);
4753 break;
4754 case BALL:
4755 s->out_transform = ball_to_xyz;
4756 prepare_out = NULL;
4757 w = lrintf(wf);
4758 h = lrintf(hf * 2.f);
4759 break;
4760 case HAMMER:
4761 s->out_transform = hammer_to_xyz;
4762 prepare_out = NULL;
4763 w = lrintf(wf);
4764 h = lrintf(hf);
4765 break;
4766 case SINUSOIDAL:
4767 s->out_transform = sinusoidal_to_xyz;
4768 prepare_out = NULL;
4769 w = lrintf(wf);
4770 h = lrintf(hf);
4771 break;
4772 case FISHEYE:
4773 s->out_transform = fisheye_to_xyz;
4774 prepare_out = prepare_fisheye_out;
4775 w = lrintf(wf * 0.5f);
4776 h = lrintf(hf);
4777 break;
4778 case PANNINI:
4779 s->out_transform = pannini_to_xyz;
4780 prepare_out = NULL;
4781 w = lrintf(wf);
4782 h = lrintf(hf);
4783 break;
4784 case CYLINDRICAL:
4785 s->out_transform = cylindrical_to_xyz;
4786 prepare_out = prepare_cylindrical_out;
4787 w = lrintf(wf);
4788 h = lrintf(hf * 0.5f);
4789 break;
4790 case CYLINDRICALEA:
4791 s->out_transform = cylindricalea_to_xyz;
4792 prepare_out = prepare_cylindricalea_out;
4793 w = lrintf(wf);
4794 h = lrintf(hf);
4795 break;
4796 case PERSPECTIVE:
4797 s->out_transform = perspective_to_xyz;
4798 prepare_out = NULL;
4799 w = lrintf(wf / 2.f);
4800 h = lrintf(hf);
4801 break;
4802 case TETRAHEDRON:
4803 s->out_transform = tetrahedron_to_xyz;
4804 prepare_out = NULL;
4805 w = lrintf(wf);
4806 h = lrintf(hf);
4807 break;
4808 case BARREL_SPLIT:
4809 s->out_transform = barrelsplit_to_xyz;
4810 prepare_out = NULL;
4811 w = lrintf(wf / 4.f * 3.f);
4812 h = lrintf(hf);
4813 break;
4814 case TSPYRAMID:
4815 s->out_transform = tspyramid_to_xyz;
4816 prepare_out = NULL;
4817 w = lrintf(wf);
4818 h = lrintf(hf);
4819 break;
4820 case HEQUIRECTANGULAR:
4821 s->out_transform = hequirect_to_xyz;
4822 prepare_out = NULL;
4823 w = lrintf(wf / 2.f);
4824 h = lrintf(hf);
4825 break;
4826 case EQUISOLID:
4827 s->out_transform = equisolid_to_xyz;
4828 prepare_out = prepare_equisolid_out;
4829 w = lrintf(wf);
4830 h = lrintf(hf * 2.f);
4831 break;
4832 case ORTHOGRAPHIC:
4833 s->out_transform = orthographic_to_xyz;
4834 prepare_out = prepare_orthographic_out;
4835 w = lrintf(wf);
4836 h = lrintf(hf * 2.f);
4837 break;
4838 case OCTAHEDRON:
4839 s->out_transform = octahedron_to_xyz;
4840 prepare_out = NULL;
4841 w = lrintf(wf);
4842 h = lrintf(hf * 2.f);
4843 break;
4844 default:
4845 av_log(ctx, AV_LOG_ERROR, "Specified output format is not handled.\n");
4846 return AVERROR_BUG;
4847 }
4848
4849 // Override resolution with user values if specified
4850 if (s->width > 0 && s->height <= 0 && s->h_fov > 0.f && s->v_fov > 0.f &&
4851 s->out == FLAT && s->d_fov == 0.f) {
4852 w = s->width;
4853 err = get_output_dimension(ctx, "height",
4854 w / tanf(s->h_fov * M_PI / 360.f) * tanf(s->v_fov * M_PI / 360.f), &h);
4855 if (err < 0)
4856 return err;
4857 } else if (s->width <= 0 && s->height > 0 && s->h_fov > 0.f && s->v_fov > 0.f &&
4858 s->out == FLAT && s->d_fov == 0.f) {
4859 h = s->height;
4860 err = get_output_dimension(ctx, "width",
4861 h / tanf(s->v_fov * M_PI / 360.f) * tanf(s->h_fov * M_PI / 360.f), &w);
4862 if (err < 0)
4863 return err;
4864 } else if (s->width > 0 && s->height > 0) {
4865 w = s->width;
4866 h = s->height;
4867 } else if (s->width > 0 || s->height > 0) {
4868 av_log(ctx, AV_LOG_ERROR, "Both width and height values should be specified.\n");
4869 return AVERROR(EINVAL);
4870 } else {
4871 if (s->out_transpose)
4872 FFSWAP(int, w, h);
4873
4874 if (s->in_transpose)
4875 FFSWAP(int, w, h);
4876 }
4877
4878 if (w < 1 || w > INT16_MAX || h < 1 || h > INT16_MAX) {
4879 av_log(ctx, AV_LOG_ERROR,
4880 "Output dimensions %dx%d are outside the allowed range [1, %d].\n",
4881 w, h, INT16_MAX);
4882 return AVERROR(EINVAL);
4883 }
4884
4885 s->width = w;
4886 s->height = h;
4887
4888 switch (s->out) {
4889 case CYLINDRICAL:
4890 case FLAT:
4891 default_h_fov = 90.f;
4892 default_v_fov = 45.f;
4893 break;
4894 case EQUISOLID:
4895 case ORTHOGRAPHIC:
4896 case STEREOGRAPHIC:
4897 case DUAL_FISHEYE:
4898 case FISHEYE:
4899 default_h_fov = 180.f;
4900 default_v_fov = 180.f;
4901 break;
4902 default:
4903 break;
4904 }
4905
4906 if (s->h_fov == 0.f)
4907 s->h_fov = default_h_fov;
4908
4909 if (s->v_fov == 0.f)
4910 s->v_fov = default_v_fov;
4911
4912 if (s->d_fov > 0.f)
4913 fov_from_dfov(s->out, s->d_fov, w, h, &s->h_fov, &s->v_fov);
4914
4915 if (prepare_out) {
4916 err = prepare_out(ctx);
4917 if (err != 0)
4918 return err;
4919 }
4920
4921 set_dimensions(s->pr_width, s->pr_height, w, h, desc);
4922
4923 {
4924 int min_w, min_h;
4925 const int pw = s->out_transpose ? AV_CEIL_RSHIFT(h, desc->log2_chroma_h)
4926 : AV_CEIL_RSHIFT(w, desc->log2_chroma_w);
4927 const int ph = s->out_transpose ? AV_CEIL_RSHIFT(w, desc->log2_chroma_w)
4928 : AV_CEIL_RSHIFT(h, desc->log2_chroma_h);
4929
4930 projection_min_size(s->out, &min_w, &min_h);
4931 if (pw < min_w || ph < min_h) {
4932 av_log(ctx, AV_LOG_ERROR,
4933 "Output %dx%d is too small for the output projection "
4934 "(requires at least %dx%d per plane).\n", pw, ph, min_w, min_h);
4935 return AVERROR(EINVAL);
4936 }
4937 }
4938
4939 switch (s->out_stereo) {
4940 case STEREO_2D:
4941 out_offset_w = out_offset_h = 0;
4942 break;
4943 case STEREO_SBS:
4944 out_offset_w = w;
4945 out_offset_h = 0;
4946 w *= 2;
4947 break;
4948 case STEREO_TB:
4949 out_offset_w = 0;
4950 out_offset_h = h;
4951 h *= 2;
4952 break;
4953 default:
4954 av_assert0(0);
4955 }
4956
4957 set_dimensions(s->out_offset_w, s->out_offset_h, out_offset_w, out_offset_h, desc);
4958 set_dimensions(s->planewidth, s->planeheight, w, h, desc);
4959
4960 for (int i = 0; i < 4; i++)
4961 s->uv_linesize[i] = FFALIGN(s->pr_width[i], 8);
4962
4963 outlink->h = h;
4964 outlink->w = w;
4965
4966 s->nb_threads = FFMIN(outlink->h, ff_filter_get_nb_threads(ctx));
4967 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
4968 have_alpha = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA);
4969
4970 if (desc->log2_chroma_h == desc->log2_chroma_w && desc->log2_chroma_h == 0) {
4971 s->nb_allocated = 1;
4972 s->map[0] = s->map[1] = s->map[2] = s->map[3] = 0;
4973 } else {
4974 s->nb_allocated = 2;
4975 s->map[0] = s->map[3] = 0;
4976 s->map[1] = s->map[2] = 1;
4977 }
4978
4979 if (!s->slice_remap)
4980 s->slice_remap = av_calloc(s->nb_threads, sizeof(*s->slice_remap));
4981 if (!s->slice_remap)
4982 return AVERROR(ENOMEM);
4983
4984 for (int i = 0; i < s->nb_allocated; i++) {
4985 err = allocate_plane(s, sizeof_uv, sizeof_ker, sizeof_mask * have_alpha * s->alpha, i);
4986 if (err < 0)
4987 return err;
4988 }
4989
4990 calculate_rotation(s->yaw, s->pitch, s->roll,
4991 s->rot_quaternion, s->rotation_order);
4992
4993 set_mirror_modifier(s->h_flip, s->v_flip, s->d_flip, s->output_mirror_modifier);
4994
4995 ff_filter_execute(ctx, v360_slice, NULL, NULL, s->nb_threads);
4996
4997 return 0;
4998}
4999
5000static int filter_frame(AVFilterLink *inlink, AVFrame *in)
5001{
5002 AVFilterContext *ctx = inlink->dst;
5003 AVFilterLink *outlink = ctx->outputs[0];
5004 V360Context *s = ctx->priv;
5005 AVFrame *out;
5006 ThreadData td;
5007
5008 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
5009 if (!out) {
5010 av_frame_free(&in);
5011 return AVERROR(ENOMEM);
5012 }
5013 av_frame_copy_props(out, in);
5014
5015 td.in = in;
5016 td.out = out;
5017
5018 ff_filter_execute(ctx, s->remap_slice, &td, NULL, s->nb_threads);
5019
5020 av_frame_free(&in);
5021 return ff_filter_frame(outlink, out);
5022}
5023
5024static void reset_rot(V360Context *s)
5025{
5026 s->rot_quaternion[0][0] = 1.f;
5027 s->rot_quaternion[0][1] = s->rot_quaternion[0][2] = s->rot_quaternion[0][3] = 0.f;
5028}
5029
5030static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
5031 char *res, int res_len, int flags)
5032{
5033 V360Context *s = ctx->priv;
5034 int ret;
5035
5036 if (s->reset_rot <= 0)
5037 s->yaw = s->pitch = s->roll = 0.f;
5038 if (s->reset_rot < 0)
5039 s->reset_rot = 0;
5040
5041 ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
5042 if (ret < 0)
5043 return ret;
5044
5045 if (s->reset_rot)
5046 reset_rot(s);
5047
5048 return config_output(ctx->outputs[0]);
5049}
5050
5051static av_cold int init(AVFilterContext *ctx)
5052{
5053 V360Context *s = ctx->priv;
5054
5055 reset_rot(s);
5056
5057 return 0;
5058}
5059
5060static av_cold void uninit(AVFilterContext *ctx)
5061{
5062 V360Context *s = ctx->priv;
5063
5064 for (int n = 0; n < s->nb_threads && s->slice_remap; n++) {
5065 SliceXYRemap *r = &s->slice_remap[n];
5066
5067 for (int p = 0; p < s->nb_allocated; p++) {
5068 av_freep(&r->u[p]);
5069 av_freep(&r->v[p]);
5070 av_freep(&r->ker[p]);
5071 }
5072
5073 av_freep(&r->mask);
5074 }
5075
5076 av_freep(&s->slice_remap);
5077}
5078
5079static const AVFilterPad inputs[] = {
5080 {
5081 .name = "default",
5082 .type = AVMEDIA_TYPE_VIDEO,
5083 .filter_frame = filter_frame,
5084 },
5085};
5086
5087static const AVFilterPad outputs[] = {
5088 {
5089 .name = "default",
5090 .type = AVMEDIA_TYPE_VIDEO,
5091 .config_props = config_output,
5092 },
5093};
5094
5095const FFFilter ff_vf_v360 = {
5096 .p.name = "v360",
5097 .p.description = NULL_IF_CONFIG_SMALL("Convert 360 projection of video."),
5098 .p.priv_class = &v360_class,
5099 .p.flags = AVFILTER_FLAG_SLICE_THREADS,
5100 .priv_size = sizeof(V360Context),
5101 .init = init,
5102 .uninit = uninit,
5103 FILTER_INPUTS(inputs),
5104 FILTER_OUTPUTS(outputs),
5105 FILTER_QUERY_FUNC2(query_formats),
5106 .process_command = process_command,
5107};
vf
uint8_t ptrdiff_t const uint8_t ptrdiff_t int const int8_t const int8_t * vf
Definition dsp.h:262
hf
uint8_t ptrdiff_t const uint8_t ptrdiff_t int const int8_t * hf
Definition dsp.h:262
val
static double val(void *priv, double ch)
Definition aeval.c:77
query_formats
static int query_formats(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
Definition aeval.c:246
inputs
static const AVFilterPad inputs[]
Definition af_aap.c:299
outputs
static const AVFilterPad outputs[]
Definition af_aap.c:310
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition af_acrusher.c:307
TFLAGS
#define TFLAGS
Definition af_afade.c:66
format
static const char *const format[]
Definition af_aiir.c:444
float
float
Definition af_crystalizer.c:122
ff_vf_v360
const FFFilter ff_vf_v360
Definition vf_v360.c:5095
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition avassert.h:58
av_unreachable
#define av_unreachable(msg)
Asserts that are used as compiler optimization hints depending upon ASSERT_LEVEL and NBDEBUG.
Definition avassert.h:109
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition avassert.h:42
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition avfilter.c:1068
ff_filter_process_command
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition avfilter.c:906
ff_filter_execute
int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition avfilter.c:1696
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition avfilter.c:846
avfilter.h
Main libavfilter public API header.
flags
#define flags(name, subs,...)
Definition cbs_h264.c:74
i
#define i(width, name, range_min, range_max)
Definition cbs_h264.c:63
ph
static int FUNC ph(CodedBitstreamContext *ctx, RWContext *rw, H266RawPH *current)
Definition cbs_h266_syntax_template.c:3052
ui
#define ui(width, name)
Definition cbs_mpeg2.c:66
s
#define s(width, name)
Definition cbs_vp9.c:198
UP
#define UP
Definition cdgraphics.c:166
DOWN
#define DOWN
Definition cdgraphics.c:167
LEFT
#define LEFT
Definition cdgraphics.c:168
RIGHT
#define RIGHT
Definition cdgraphics.c:169
ARCH_X86
#define ARCH_X86
Definition checkasm_config.h:77
FLAGS
#define FLAGS
Definition cmdutils.c:598
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition common.h:60
av_clip
#define av_clip
Definition common.h:100
av_clipf
#define av_clipf
Definition common.h:145
FFSIGN
#define FFSIGN(a)
Definition common.h:75
NULL
#define NULL
Definition coverity.c:32
int64_t
long long int64_t
Definition coverity.c:34
sqrtf
static __device__ float sqrtf(float a)
Definition cuda_runtime.h:184
fabsf
static __device__ float fabsf(float a)
Definition cuda_runtime.h:181
floorf
static __device__ float floorf(float a)
Definition cuda_runtime.h:172
ceilf
static __device__ float ceilf(float a)
Definition cuda_runtime.h:175
filter_frame
static int filter_frame(DBEDecodeContext *s, AVFrame *frame)
Definition dolby_e.c:1067
init
int(* init)(AVBSFContext *ctx)
Definition dts2pts.c:608
S
#define S(s, c, i)
Definition flacdsp_template.c:46
ff_set_pixel_formats_from_list2
int ff_set_pixel_formats_from_list2(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out, const enum AVPixelFormat *fmts)
Definition formats.c:1162
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition opt.h:298
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition opt.h:258
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Underlying C type is float.
Definition opt.h:270
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Underlying C type is int.
Definition opt.h:326
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Underlying C type is a uint8_t* that is either NULL or points to a C string allocated with the av_mal...
Definition opt.h:275
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:166
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition error.h:52
AVERROR
#define AVERROR(e)
Definition error.h:45
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition frame.c:64
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition frame.c:599
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition log.h:216
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition log.h:210
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition avutil.h:200
a
int a
Definition h264pred_template.c:416
alpha
static const int16_t alpha[]
Definition ilbcdata.h:55
r
#define r
Definition input.c:42
b
#define b
Definition input.c:43
scale
static void scale(int *out, const int *in, const int w, const int h, const int shift)
Definition intra.c:278
uninit
static av_cold void uninit(AVBitStreamFilterContext *ctx)
Definition lcevc_merge.c:135
config_output
static int config_output(AVBitStreamFilterLink *outlink)
Definition lcevc_merge.c:111
u
#define u(width, name, range_min, range_max)
Definition cbs_apv.c:68
us
#define us(width, name, range_min, range_max, subs,...)
Definition cbs_apv.c:70
arg
const char * arg
Definition jacosubdec.c:65
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition filters.h:264
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition filters.h:265
ff_slice_pos
static int ff_slice_pos(int total, int jobnr, int nb_jobs)
Compute the boundary index for a slice when work of size total is split into nb_jobs slices.
Definition filters.h:763
AVFILTER_DEFINE_CLASS
#define AVFILTER_DEFINE_CLASS(fname)
Definition filters.h:478
FILTER_QUERY_FUNC2
#define FILTER_QUERY_FUNC2(func)
Definition filters.h:241
av_always_inline
#define av_always_inline
Definition attributes.h:72
av_cold
#define av_cold
Definition attributes.h:117
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:88
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition libkvazaar.c:296
isfinite
#define isfinite(x)
Definition libm.h:361
isnan
#define isnan(x)
Definition libm.h:342
atanf
#define atanf(x)
Definition libm.h:42
sinf
#define sinf(x)
Definition libm.h:421
cosf
#define cosf(x)
Definition libm.h:80
expf
#define expf(x)
Definition libm.h:285
atan2f
#define atan2f(y, x)
Definition libm.h:47
lrintf
#define lrintf(x)
Definition libm_mips.h:72
desc
const char * desc
Definition libsvtav1.c:83
w
uint8_t w
Definition llvidencdsp.c:39
FFMAX3
#define FFMAX3(a, b, c)
Definition macros.h:48
FFSWAP
#define FFSWAP(type, a, b)
Definition macros.h:52
FFMIN
#define FFMIN(a, b)
Definition macros.h:49
FFMAX
#define FFMAX(a, b)
Definition macros.h:47
FFALIGN
#define FFALIGN(x, a)
Definition macros.h:78
M_SQRT2
#define M_SQRT2
Definition mathematics.h:109
M_PI_2
#define M_PI_2
Definition mathematics.h:73
M_2_PI
#define M_2_PI
Definition mathematics.h:91
M_PI
#define M_PI
Definition mathematics.h:67
M_PI_4
#define M_PI_4
Definition mathematics.h:79
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition mem.c:264
mem.h
Memory handling functions.
TOP_LEFT
#define TOP_LEFT
Definition movtextdec.c:50
TOP_RIGHT
#define TOP_RIGHT
Definition movtextdec.c:52
BOTTOM_LEFT
#define BOTTOM_LEFT
Definition movtextdec.c:44
BOTTOM_RIGHT
#define BOTTOM_RIGHT
Definition movtextdec.c:46
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict, int *got_output)
Handle slice ends.
Definition mpeg12dec.c:1697
opt.h
AVOptions.
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition pixdesc.c:3500
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition pixdesc.c:3460
AV_PIX_FMT_FLAG_ALPHA
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition pixdesc.h:147
AV_PIX_FMT_GBRAP12
#define AV_PIX_FMT_GBRAP12
Definition pixfmt.h:569
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition pixfmt.h:556
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition pixfmt.h:552
AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV444P9
Definition pixfmt.h:544
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition pixfmt.h:545
AV_PIX_FMT_YUV440P12
#define AV_PIX_FMT_YUV440P12
Definition pixfmt.h:551
AV_PIX_FMT_GRAY9
#define AV_PIX_FMT_GRAY9
Definition pixfmt.h:524
AV_PIX_FMT_GBRAP16
#define AV_PIX_FMT_GBRAP16
Definition pixfmt.h:571
AV_PIX_FMT_GBRP9
#define AV_PIX_FMT_GBRP9
Definition pixfmt.h:563
AV_PIX_FMT_YUV422P9
#define AV_PIX_FMT_YUV422P9
Definition pixfmt.h:543
AV_PIX_FMT_YUVA444P10
#define AV_PIX_FMT_YUVA444P10
Definition pixfmt.h:598
AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUVA420P16
Definition pixfmt.h:601
AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUV420P12
Definition pixfmt.h:549
AV_PIX_FMT_YUVA420P10
#define AV_PIX_FMT_YUVA420P10
Definition pixfmt.h:596
AV_PIX_FMT_YUVA422P9
#define AV_PIX_FMT_YUVA422P9
Definition pixfmt.h:594
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition pixfmt.h:550
AV_PIX_FMT_GBRP10
#define AV_PIX_FMT_GBRP10
Definition pixfmt.h:564
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition pixfmt.h:546
AV_PIX_FMT_GRAY12
#define AV_PIX_FMT_GRAY12
Definition pixfmt.h:526
AV_PIX_FMT_GBRP12
#define AV_PIX_FMT_GBRP12
Definition pixfmt.h:565
AV_PIX_FMT_YUV420P9
#define AV_PIX_FMT_YUV420P9
Definition pixfmt.h:542
AV_PIX_FMT_YUVA420P9
#define AV_PIX_FMT_YUVA420P9
Definition pixfmt.h:593
AV_PIX_FMT_YUVA422P10
#define AV_PIX_FMT_YUVA422P10
Definition pixfmt.h:597
AV_PIX_FMT_YUV420P14
#define AV_PIX_FMT_YUV420P14
Definition pixfmt.h:553
AVPixelFormat
AVPixelFormat
Pixel format.
Definition pixfmt.h:71
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition pixfmt.h:72
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition pixfmt.h:73
AV_PIX_FMT_YUV440P
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition pixfmt.h:106
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition pixfmt.h:77
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition pixfmt.h:81
AV_PIX_FMT_YUVA420P
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition pixfmt.h:108
AV_PIX_FMT_YUVJ440P
@ AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range
Definition pixfmt.h:107
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition pixfmt.h:79
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition pixfmt.h:80
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition pixfmt.h:78
AV_PIX_FMT_YUVA444P
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition pixfmt.h:174
AV_PIX_FMT_YUVJ411P
@ AV_PIX_FMT_YUVJ411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition pixfmt.h:283
AV_PIX_FMT_GBRAP
@ AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition pixfmt.h:212
AV_PIX_FMT_YUVJ422P
@ AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition pixfmt.h:86
AV_PIX_FMT_YUVA422P
@ AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition pixfmt.h:173
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition pixfmt.h:165
AV_PIX_FMT_YUVJ444P
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition pixfmt.h:87
AV_PIX_FMT_YUVJ420P
@ AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition pixfmt.h:85
AV_PIX_FMT_YUVA422P12
#define AV_PIX_FMT_YUVA422P12
Definition pixfmt.h:599
AV_PIX_FMT_YUV422P14
#define AV_PIX_FMT_YUV422P14
Definition pixfmt.h:554
AV_PIX_FMT_GRAY10
#define AV_PIX_FMT_GRAY10
Definition pixfmt.h:525
AV_PIX_FMT_GRAY14
#define AV_PIX_FMT_GRAY14
Definition pixfmt.h:527
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition pixfmt.h:557
AV_PIX_FMT_YUV440P10
#define AV_PIX_FMT_YUV440P10
Definition pixfmt.h:547
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition pixfmt.h:528
AV_PIX_FMT_GBRAP10
#define AV_PIX_FMT_GBRAP10
Definition pixfmt.h:568
AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA444P16
Definition pixfmt.h:603
AV_PIX_FMT_YUVA422P16
#define AV_PIX_FMT_YUVA422P16
Definition pixfmt.h:602
AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GBRP16
Definition pixfmt.h:567
AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUV444P14
Definition pixfmt.h:555
AV_PIX_FMT_YUVA444P9
#define AV_PIX_FMT_YUVA444P9
Definition pixfmt.h:595
AV_PIX_FMT_GBRP14
#define AV_PIX_FMT_GBRP14
Definition pixfmt.h:566
AV_PIX_FMT_YUVA444P12
#define AV_PIX_FMT_YUVA444P12
Definition pixfmt.h:600
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition pixfmt.h:558
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition pixfmt.h:548
name
const char * name
Definition qsvenc.c:142
elements
static const ElemCat * elements[ELEMENT_COUNT]
Definition signature.h:565
AVFilterContext
An instance of a filter.
Definition avfilter.h:273
AVFilterFormatsConfig
Lists of formats / etc.
Definition avfilter.h:120
AVFilterPad
A filter pad used for either input or output.
Definition filters.h:40
AVFrame
This structure describes decoded (raw) audio or video data.
Definition frame.h:472
AVOption
AVOption.
Definition opt.h:428
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition pixdesc.h:69
ThreadData
Used for passing data between threads.
Definition dsddec.c:71
ThreadData::out
AVFrame * out
Definition af_adeclick.c:532
XYRemap::u
int16_t u[4][4]
Definition v360.h:109
XYRemap::v
int16_t v[4][4]
Definition v360.h:110
av_freep
#define av_freep(p)
Definition tableprint_vlc.h:35
av_log
#define av_log(a,...)
Definition tableprint_vlc.h:27
tmp
static uint8_t tmp[40]
Definition aes_ctr.c:52
out
static FILE * out
Definition movenc.c:55
ctx
static AVFormatContext * ctx
Definition movenc.c:49
height
#define height
Definition dsp.h:89
width
#define width
Definition dsp.h:89
q1
static const uint8_t q1[256]
Definition twofish.c:100
q0
static const uint8_t q0[256]
Definition twofish.c:81
NB_FACES
@ NB_FACES
Definition v360.h:80
TOP_MIDDLE
@ TOP_MIDDLE
Definition v360.h:75
BOTTOM_MIDDLE
@ BOTTOM_MIDDLE
Definition v360.h:78
NB_DIRECTIONS
@ NB_DIRECTIONS
Definition v360.h:90
ROT_90
@ ROT_90
Definition v360.h:95
ROT_270
@ ROT_270
Definition v360.h:97
ROT_0
@ ROT_0
Definition v360.h:94
ROT_180
@ ROT_180
Definition v360.h:96
ff_v360_init
void ff_v360_init(V360Context *s, int depth)
Definition vf_v360.c:376
SPLINE16
@ SPLINE16
Definition v360.h:67
NB_INTERP_METHODS
@ NB_INTERP_METHODS
Definition v360.h:70
LAGRANGE9
@ LAGRANGE9
Definition v360.h:64
MITCHELL
@ MITCHELL
Definition v360.h:69
BICUBIC
@ BICUBIC
Definition v360.h:65
LANCZOS
@ LANCZOS
Definition v360.h:66
GAUSSIAN
@ GAUSSIAN
Definition v360.h:68
ff_v360_init_x86
void ff_v360_init_x86(V360Context *s, int depth)
Definition vf_v360_init.c:44
EQUISOLID
@ EQUISOLID
Definition v360.h:54
FLAT
@ FLAT
Definition v360.h:37
FISHEYE
@ FISHEYE
Definition v360.h:46
DUAL_FISHEYE
@ DUAL_FISHEYE
Definition v360.h:38
EQUIRECTANGULAR
@ EQUIRECTANGULAR
Definition v360.h:33
PERSPECTIVE
@ PERSPECTIVE
Definition v360.h:49
TSPYRAMID
@ TSPYRAMID
Definition v360.h:52
CUBEMAP_3_2
@ CUBEMAP_3_2
Definition v360.h:34
CUBEMAP_6_1
@ CUBEMAP_6_1
Definition v360.h:35
SINUSOIDAL
@ SINUSOIDAL
Definition v360.h:45
HEQUIRECTANGULAR
@ HEQUIRECTANGULAR
Definition v360.h:53
OCTAHEDRON
@ OCTAHEDRON
Definition v360.h:56
HAMMER
@ HAMMER
Definition v360.h:44
CUBEMAP_1_6
@ CUBEMAP_1_6
Definition v360.h:40
STEREOGRAPHIC
@ STEREOGRAPHIC
Definition v360.h:41
CYLINDRICAL
@ CYLINDRICAL
Definition v360.h:48
BALL
@ BALL
Definition v360.h:43
CYLINDRICALEA
@ CYLINDRICALEA
Definition v360.h:57
PANNINI
@ PANNINI
Definition v360.h:47
BARREL_SPLIT
@ BARREL_SPLIT
Definition v360.h:51
EQUIANGULAR
@ EQUIANGULAR
Definition v360.h:36
BARREL
@ BARREL
Definition v360.h:39
NB_PROJECTIONS
@ NB_PROJECTIONS
Definition v360.h:58
TETRAHEDRON
@ TETRAHEDRON
Definition v360.h:50
MERCATOR
@ MERCATOR
Definition v360.h:42
ORTHOGRAPHIC
@ ORTHOGRAPHIC
Definition v360.h:55
STEREO_SBS
@ STEREO_SBS
Definition v360.h:27
STEREO_TB
@ STEREO_TB
Definition v360.h:28
STEREO_2D
@ STEREO_2D
Definition v360.h:26
NB_STEREO_FMTS
@ NB_STEREO_FMTS
Definition v360.h:29
ROLL
@ ROLL
Definition v360.h:104
NB_RORDERS
@ NB_RORDERS
Definition v360.h:105
YAW
@ YAW
Definition v360.h:102
PITCH
@ PITCH
Definition v360.h:103
interp
interp
Definition vf_curves.c:62
NEAREST
#define NEAREST(type, name)
Definition vf_lenscorrection.c:75
BILINEAR
#define BILINEAR(type, name)
Definition vf_lenscorrection.c:114
lanczos_kernel
static float lanczos_kernel(float x)
Definition vf_lensfun.c:196
temp
else temp
Definition vf_mcdeint.c:275
alpha_pix_fmts
static enum AVPixelFormat alpha_pix_fmts[]
Definition vf_overlay.c:154
BACK
#define BACK
Definition vf_ssim360.c:62
FRONT
#define FRONT
Definition vf_ssim360.c:61
prepare_orthographic_in
static int prepare_orthographic_in(AVFilterContext *ctx)
Prepare data for processing orthographic input format.
Definition vf_v360.c:2109
prepare_cylindrical_in
static int prepare_cylindrical_in(AVFilterContext *ctx)
Prepare data for processing cylindrical input format.
Definition vf_v360.c:3113
set_dimensions
static void set_dimensions(int *outw, int *outh, int w, int h, const AVPixFmtDescriptor *desc)
Definition vf_v360.c:4238
nearest_kernel
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.
Definition vf_v360.c:412
flat_to_xyz
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.
Definition vf_v360.c:2854
calculate_cubic_bc_coeffs
static void calculate_cubic_bc_coeffs(float t, float *coeffs, float b, float c)
Calculate 1-dimensional cubic_bc_spline coefficients.
Definition vf_v360.c:688
hequirect_to_xyz
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.
Definition vf_v360.c:1814
prepare_dfisheye_in
static int prepare_dfisheye_in(AVFilterContext *ctx)
Prepare data for processing double fisheye input format.
Definition vf_v360.c:3407
spline16_kernel
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.
Definition vf_v360.c:611
v360_slice
static int v360_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition vf_v360.c:4247
prepare_eac_in
static int prepare_eac_in(AVFilterContext *ctx)
Prepare data for processing equi-angular cubemap input format.
Definition vf_v360.c:2617
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)
Calculate frame position in half equirectangular format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2232
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)
Calculate frame position in mercator format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2336
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)
Calculate frame position in cubemap6x1 format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:1690
rescale
static av_always_inline float rescale(int x, float s)
Definition vf_v360.c:1399
calculate_bicubic_coeffs
static void calculate_bicubic_coeffs(float t, float *coeffs)
Calculate 1-dimensional cubic coefficients.
Definition vf_v360.c:495
rotate
static void rotate(const float rot_quaternion[2][4], float *vec)
Rotate vector with given rotation quaternion.
Definition vf_v360.c:4081
DEFINE_REMAP1_LINE
#define DEFINE_REMAP1_LINE(bits, div)
Definition vf_v360.c:259
scale
static av_always_inline float scale(float x, float s)
Definition vf_v360.c:1394
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)
Calculate frame position in barrel facebook's format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:3588
cube3x2_to_xyz
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.
Definition vf_v360.c:1414
get_output_dimension
static int get_output_dimension(AVFilterContext *ctx, const char *name, float val, int *dim)
Definition vf_v360.c:4312
prepare_eac_out
static int prepare_eac_out(AVFilterContext *ctx)
Prepare data for processing equi-angular cubemap output format.
Definition vf_v360.c:2645
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)
Calculate frame position in equisolid format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2020
barrelsplit_to_xyz
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...
Definition vf_v360.c:3756
prepare_flat_out
static int prepare_flat_out(AVFilterContext *ctx)
Prepare data for processing flat output format.
Definition vf_v360.c:2834
input_flip
static void input_flip(int16_t u[4][4], int16_t v[4][4], int w, int h, int hflip, int vflip)
Definition vf_v360.c:4114
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)
Calculate frame position in equi-angular cubemap format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2779
DEFINE_REMAP
#define DEFINE_REMAP(ws, bits)
Generate remapping function with a given window size and pixel depth.
Definition vf_v360.c:283
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)
Calculate frame position in fisheye format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2946
dfisheye_to_xyz
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.
Definition vf_v360.c:3427
sinusoidal_to_xyz
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.
Definition vf_v360.c:2553
prepare_cylindricalea_out
static int prepare_cylindricalea_out(AVFilterContext *ctx)
Prepare data for processing cylindrical equal area output format.
Definition vf_v360.c:3172
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)
Calculate frame position in octahedron format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:3990
ball_to_xyz
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.
Definition vf_v360.c:2441
calculate_lanczos_coeffs
static void calculate_lanczos_coeffs(float t, float *coeffs)
Calculate 1-dimensional lanczos coefficients.
Definition vf_v360.c:540
calculate_gaussian_coeffs
static void calculate_gaussian_coeffs(float t, float *coeffs)
Calculate 1-dimensional gaussian coefficients.
Definition vf_v360.c:635
conjugate_quaternion
static void conjugate_quaternion(float d[4], const float q[4])
Definition vf_v360.c:4035
normalize_vector
static void normalize_vector(float *vec)
Normalize vector.
Definition vf_v360.c:1054
get_direction
static int get_direction(char c)
Convert char to corresponding direction.
Definition vf_v360.c:818
ff_v360_init
void ff_v360_init(V360Context *s, int depth)
Definition vf_v360.c:376
equirect_to_xyz
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.
Definition vf_v360.c:1785
cube1x6_to_xyz
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.
Definition vf_v360.c:1542
projection_min_size
static void projection_min_size(int projection, int *min_w, int *min_h)
Definition vf_v360.c:4326
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)
Calculate frame position in cylindrical equal area format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:3243
calculate_spline16_coeffs
static void calculate_spline16_coeffs(float t, float *coeffs)
Calculate 1-dimensional spline16 coefficients.
Definition vf_v360.c:593
reflectx
static int reflectx(int x, int y, int w, int h)
Reflect x operation.
Definition vf_v360.c:806
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)
Calculate frame position in dual fisheye format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:3466
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)
Calculate frame position in pannini format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:3023
orthographic_to_xyz
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.
Definition vf_v360.c:2078
prepare_cube_in
static int prepare_cube_in(AVFilterContext *ctx)
Prepare data for processing cubemap input format.
Definition vf_v360.c:885
prepare_fisheye_in
static int prepare_fisheye_in(AVFilterContext *ctx)
Prepare data for processing fisheye input format.
Definition vf_v360.c:2924
mirror
static void mirror(const float *modifier, float *vec)
Definition vf_v360.c:4107
lanczos_kernel
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.
Definition vf_v360.c:569
cube_to_xyz
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.
Definition vf_v360.c:1075
perspective_to_xyz
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.
Definition vf_v360.c:3283
ereflectx
static int ereflectx(int x, int y, int w, int h)
Reflect x operation for equirect.
Definition vf_v360.c:790
prepare_equirect_in
static int prepare_equirect_in(AVFilterContext *ctx)
Prepare data for processing equirectangular input format.
Definition vf_v360.c:2169
prepare_equisolid_out
static int prepare_equisolid_out(AVFilterContext *ctx)
Prepare data for processing equisolid output format.
Definition vf_v360.c:1949
gaussian_kernel
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.
Definition vf_v360.c:664
prepare_fisheye_out
static int prepare_fisheye_out(AVFilterContext *ctx)
Prepare data for processing fisheye output format.
Definition vf_v360.c:2875
prepare_cylindricalea_in
static int prepare_cylindricalea_in(AVFilterContext *ctx)
Prepare data for processing cylindrical equal area input format.
Definition vf_v360.c:3189
tspyramid_to_xyz
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.
Definition vf_v360.c:3831
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)
Find position on another cube face in case of overflow/underflow.
Definition vf_v360.c:1212
get_rotation
static int get_rotation(char c)
Convert char to corresponding rotation angle.
Definition vf_v360.c:842
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition vf_v360.c:5000
allocate_plane
static int allocate_plane(V360Context *s, int sizeof_uv, int sizeof_ker, int sizeof_mask, int p)
Definition vf_v360.c:4131
rotate_cube_face
static void rotate_cube_face(float *uf, float *vf, int rotation)
Definition vf_v360.c:986
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)
Calculate frame position in barrel split facebook's format for corresponding 3D coordinates on sphere...
Definition vf_v360.c:3660
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)
Calculate frame position in cylindrical format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:3135
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)
Calculate frame position in stereographic format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:1911
reflecty
static int reflecty(int y, int h)
Reflect y operation.
Definition vf_v360.c:771
bicubic_kernel
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.
Definition vf_v360.c:516
stereographic_to_xyz
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.
Definition vf_v360.c:1860
set_mirror_modifier
static void set_mirror_modifier(int h_flip, int v_flip, int d_flip, float *modifier)
Definition vf_v360.c:4099
query_formats
static int query_formats(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
Definition vf_v360.c:175
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)
Calculate frame position in cubemap1x6 format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:1610
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)
Calculate frame position in flat format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2289
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:5030
lagrange_kernel
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.
Definition vf_v360.c:471
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)
Calculate frame position in orthographic format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2131
xyz_to_cube
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.
Definition vf_v360.c:1137
cube6x1_to_xyz
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.
Definition vf_v360.c:1575
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition vf_v360.c:5060
prepare_stereographic_out
static int prepare_stereographic_out(AVFilterContext *ctx)
Prepare data for processing stereographic output format.
Definition vf_v360.c:1840
fov_from_dfov
static void fov_from_dfov(int format, float d_fov, float w, float h, float *h_fov, float *v_fov)
Definition vf_v360.c:4165
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)
Calculate frame position in equirectangular format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2191
prepare_cylindrical_out
static int prepare_cylindrical_out(AVFilterContext *ctx)
Prepare data for processing cylindrical output format.
Definition vf_v360.c:3064
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)
Calculate frame position in cubemap3x2 format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:1453
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)
Calculate frame position in hammer format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2514
pannini_to_xyz
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.
Definition vf_v360.c:2989
mitchell_kernel
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.
Definition vf_v360.c:729
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)
Calculate frame position in sinusoidal format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2584
cylindricalea_to_xyz
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.
Definition vf_v360.c:3209
mercator_to_xyz
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.
Definition vf_v360.c:2372
calculate_lagrange_coeffs
static void calculate_lagrange_coeffs(float t, float *coeffs)
Calculate 1-dimensional lagrange coefficients.
Definition vf_v360.c:454
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)
Calculate frame position in tetrahedron format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:3355
OFFSET
#define OFFSET(x)
Definition vf_v360.c:53
config_output
static int config_output(AVFilterLink *outlink)
Definition vf_v360.c:4340
prepare_flat_in
static int prepare_flat_in(AVFilterContext *ctx)
Prepare data for processing flat input format.
Definition vf_v360.c:2267
prepare_orthographic_out
static int prepare_orthographic_out(AVFilterContext *ctx)
Prepare data for processing orthographic output format.
Definition vf_v360.c:2058
tetrahedron_to_xyz
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.
Definition vf_v360.c:3329
cylindrical_to_xyz
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.
Definition vf_v360.c:3084
hammer_to_xyz
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.
Definition vf_v360.c:2475
prepare_equisolid_in
static int prepare_equisolid_in(AVFilterContext *ctx)
Prepare data for processing equisolid input format.
Definition vf_v360.c:1998
barrel_to_xyz
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.
Definition vf_v360.c:3516
equisolid_to_xyz
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.
Definition vf_v360.c:1969
multiply_quaternion
static void multiply_quaternion(float c[4], const float a[4], const float b[4])
Definition vf_v360.c:4027
DEFINE_REMAP_LINE
#define DEFINE_REMAP_LINE(ws, bits, div)
Definition vf_v360.c:341
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)
Calculate frame position in ball format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:2404
calculate_rotation
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.
Definition vf_v360.c:4046
get_rorder
static int get_rorder(char c)
Convert char to corresponding rotation order.
Definition vf_v360.c:861
eac_to_xyz
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.
Definition vf_v360.c:2676
octahedron_to_xyz
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.
Definition vf_v360.c:3957
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)
Calculate frame position in tspyramid format for corresponding 3D coordinates on sphere.
Definition vf_v360.c:3889
prepare_equirect_out
static int prepare_equirect_out(AVFilterContext *ctx)
Prepare data for processing equirectangular output format.
Definition vf_v360.c:1765
offset_vector
static void offset_vector(float *vec, float h_offset, float v_offset)
Offset vector.
Definition vf_v360.c:1043
fisheye_to_xyz
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.
Definition vf_v360.c:2895
rotate_cube_face_inverse
static void rotate_cube_face_inverse(float *uf, float *vf, int rotation)
Definition vf_v360.c:1012
prepare_cube_out
static int prepare_cube_out(AVFilterContext *ctx)
Prepare data for processing cubemap output format.
Definition vf_v360.c:939
v360_options
static const AVOption v360_options[]
Definition vf_v360.c:57
mod
static int mod(int a, int b)
Modulo operation with only positive remainders.
Definition vf_v360.c:755
reset_rot
static void reset_rot(V360Context *s)
Definition vf_v360.c:5024
prepare_stereographic_in
static int prepare_stereographic_in(AVFilterContext *ctx)
Prepare data for processing stereographic input format.
Definition vf_v360.c:1889
bilinear_kernel
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.
Definition vf_v360.c:432
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition video.c:89
dim
int dim
Definition vorbis_enc_data.h:425
h
h
Definition vp9dsp_template.c:2070
c
static double c[64]
Definition vsrc_mptestsrc.c:89
slice_start
static int slice_start(SliceContext *sc, VVCContext *s, VVCFrameContext *fc, const CodedBitstreamUnit *unit, const int is_first_slice)
Definition dec.c:844
Generated on Mon Aug 17 2026 20:21:07 for FFmpeg by doxygen 1.13.2