| /* |
| * Copyright (c) 2019 Eugene Lyapustin |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * 360 video conversion filter. |
| * Principle of operation: |
| * |
| * (for each pixel in output frame) |
| * 1) Calculate OpenGL-like coordinates (x, y, z) for pixel position (i, j) |
| * 2) Apply 360 operations (rotation, mirror) to (x, y, z) |
| * 3) Calculate pixel position (u, v) in input frame |
| * 4) Calculate interpolation window and weight for each pixel |
| * |
| * (for each frame) |
| * 5) Remap input frame to output frame using precalculated data |
| */ |
| |
| #include <math.h> |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/pixdesc.h" |
| #include "libavutil/opt.h" |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| #include "v360.h" |
| |
| typedef struct ThreadData { |
| AVFrame *in; |
| AVFrame *out; |
| } ThreadData; |
| |
| #define OFFSET(x) offsetof(V360Context, x) |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| #define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
| |
| static const AVOption v360_options[] = { |
| { "input", "set input projection", OFFSET(in), AV_OPT_TYPE_INT, {.i64=EQUIRECTANGULAR}, 0, NB_PROJECTIONS-1, FLAGS, "in" }, |
| { "e", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIRECTANGULAR}, 0, 0, FLAGS, "in" }, |
| { "equirect", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIRECTANGULAR}, 0, 0, FLAGS, "in" }, |
| { "c3x2", "cubemap 3x2", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_3_2}, 0, 0, FLAGS, "in" }, |
| { "c6x1", "cubemap 6x1", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_6_1}, 0, 0, FLAGS, "in" }, |
| { "eac", "equi-angular cubemap", 0, AV_OPT_TYPE_CONST, {.i64=EQUIANGULAR}, 0, 0, FLAGS, "in" }, |
| { "dfisheye", "dual fisheye", 0, AV_OPT_TYPE_CONST, {.i64=DUAL_FISHEYE}, 0, 0, FLAGS, "in" }, |
| { "flat", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, "in" }, |
| {"rectilinear", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, "in" }, |
| { "gnomonic", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, "in" }, |
| { "barrel", "barrel facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL}, 0, 0, FLAGS, "in" }, |
| { "fb", "barrel facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL}, 0, 0, FLAGS, "in" }, |
| { "c1x6", "cubemap 1x6", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_1_6}, 0, 0, FLAGS, "in" }, |
| { "sg", "stereographic", 0, AV_OPT_TYPE_CONST, {.i64=STEREOGRAPHIC}, 0, 0, FLAGS, "in" }, |
| { "mercator", "mercator", 0, AV_OPT_TYPE_CONST, {.i64=MERCATOR}, 0, 0, FLAGS, "in" }, |
| { "ball", "ball", 0, AV_OPT_TYPE_CONST, {.i64=BALL}, 0, 0, FLAGS, "in" }, |
| { "hammer", "hammer", 0, AV_OPT_TYPE_CONST, {.i64=HAMMER}, 0, 0, FLAGS, "in" }, |
| {"sinusoidal", "sinusoidal", 0, AV_OPT_TYPE_CONST, {.i64=SINUSOIDAL}, 0, 0, FLAGS, "in" }, |
| { "fisheye", "fisheye", 0, AV_OPT_TYPE_CONST, {.i64=FISHEYE}, 0, 0, FLAGS, "in" }, |
| { "pannini", "pannini", 0, AV_OPT_TYPE_CONST, {.i64=PANNINI}, 0, 0, FLAGS, "in" }, |
| {"cylindrical", "cylindrical", 0, AV_OPT_TYPE_CONST, {.i64=CYLINDRICAL}, 0, 0, FLAGS, "in" }, |
| {"tetrahedron", "tetrahedron", 0, AV_OPT_TYPE_CONST, {.i64=TETRAHEDRON}, 0, 0, FLAGS, "in" }, |
| {"barrelsplit", "barrel split facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL_SPLIT}, 0, 0, FLAGS, "in" }, |
| { "tsp", "truncated square pyramid", 0, AV_OPT_TYPE_CONST, {.i64=TSPYRAMID}, 0, 0, FLAGS, "in" }, |
| { "hequirect", "half equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=HEQUIRECTANGULAR},0, 0, FLAGS, "in" }, |
| { "he", "half equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=HEQUIRECTANGULAR},0, 0, FLAGS, "in" }, |
| { "output", "set output projection", OFFSET(out), AV_OPT_TYPE_INT, {.i64=CUBEMAP_3_2}, 0, NB_PROJECTIONS-1, FLAGS, "out" }, |
| { "e", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIRECTANGULAR}, 0, 0, FLAGS, "out" }, |
| { "equirect", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIRECTANGULAR}, 0, 0, FLAGS, "out" }, |
| { "c3x2", "cubemap 3x2", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_3_2}, 0, 0, FLAGS, "out" }, |
| { "c6x1", "cubemap 6x1", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_6_1}, 0, 0, FLAGS, "out" }, |
| { "eac", "equi-angular cubemap", 0, AV_OPT_TYPE_CONST, {.i64=EQUIANGULAR}, 0, 0, FLAGS, "out" }, |
| { "dfisheye", "dual fisheye", 0, AV_OPT_TYPE_CONST, {.i64=DUAL_FISHEYE}, 0, 0, FLAGS, "out" }, |
| { "flat", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, "out" }, |
| {"rectilinear", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, "out" }, |
| { "gnomonic", "regular video", 0, AV_OPT_TYPE_CONST, {.i64=FLAT}, 0, 0, FLAGS, "out" }, |
| { "barrel", "barrel facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL}, 0, 0, FLAGS, "out" }, |
| { "fb", "barrel facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL}, 0, 0, FLAGS, "out" }, |
| { "c1x6", "cubemap 1x6", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_1_6}, 0, 0, FLAGS, "out" }, |
| { "sg", "stereographic", 0, AV_OPT_TYPE_CONST, {.i64=STEREOGRAPHIC}, 0, 0, FLAGS, "out" }, |
| { "mercator", "mercator", 0, AV_OPT_TYPE_CONST, {.i64=MERCATOR}, 0, 0, FLAGS, "out" }, |
| { "ball", "ball", 0, AV_OPT_TYPE_CONST, {.i64=BALL}, 0, 0, FLAGS, "out" }, |
| { "hammer", "hammer", 0, AV_OPT_TYPE_CONST, {.i64=HAMMER}, 0, 0, FLAGS, "out" }, |
| {"sinusoidal", "sinusoidal", 0, AV_OPT_TYPE_CONST, {.i64=SINUSOIDAL}, 0, 0, FLAGS, "out" }, |
| { "fisheye", "fisheye", 0, AV_OPT_TYPE_CONST, {.i64=FISHEYE}, 0, 0, FLAGS, "out" }, |
| { "pannini", "pannini", 0, AV_OPT_TYPE_CONST, {.i64=PANNINI}, 0, 0, FLAGS, "out" }, |
| {"cylindrical", "cylindrical", 0, AV_OPT_TYPE_CONST, {.i64=CYLINDRICAL}, 0, 0, FLAGS, "out" }, |
| {"perspective", "perspective", 0, AV_OPT_TYPE_CONST, {.i64=PERSPECTIVE}, 0, 0, FLAGS, "out" }, |
| {"tetrahedron", "tetrahedron", 0, AV_OPT_TYPE_CONST, {.i64=TETRAHEDRON}, 0, 0, FLAGS, "out" }, |
| {"barrelsplit", "barrel split facebook's 360 format", 0, AV_OPT_TYPE_CONST, {.i64=BARREL_SPLIT}, 0, 0, FLAGS, "out" }, |
| { "tsp", "truncated square pyramid", 0, AV_OPT_TYPE_CONST, {.i64=TSPYRAMID}, 0, 0, FLAGS, "out" }, |
| { "hequirect", "half equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=HEQUIRECTANGULAR},0, 0, FLAGS, "out" }, |
| { "he", "half equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=HEQUIRECTANGULAR},0, 0, FLAGS, "out" }, |
| { "interp", "set interpolation method", OFFSET(interp), AV_OPT_TYPE_INT, {.i64=BILINEAR}, 0, NB_INTERP_METHODS-1, FLAGS, "interp" }, |
| { "near", "nearest neighbour", 0, AV_OPT_TYPE_CONST, {.i64=NEAREST}, 0, 0, FLAGS, "interp" }, |
| { "nearest", "nearest neighbour", 0, AV_OPT_TYPE_CONST, {.i64=NEAREST}, 0, 0, FLAGS, "interp" }, |
| { "line", "bilinear interpolation", 0, AV_OPT_TYPE_CONST, {.i64=BILINEAR}, 0, 0, FLAGS, "interp" }, |
| { "linear", "bilinear interpolation", 0, AV_OPT_TYPE_CONST, {.i64=BILINEAR}, 0, 0, FLAGS, "interp" }, |
| { "lagrange9", "lagrange9 interpolation", 0, AV_OPT_TYPE_CONST, {.i64=LAGRANGE9}, 0, 0, FLAGS, "interp" }, |
| { "cube", "bicubic interpolation", 0, AV_OPT_TYPE_CONST, {.i64=BICUBIC}, 0, 0, FLAGS, "interp" }, |
| { "cubic", "bicubic interpolation", 0, AV_OPT_TYPE_CONST, {.i64=BICUBIC}, 0, 0, FLAGS, "interp" }, |
| { "lanc", "lanczos interpolation", 0, AV_OPT_TYPE_CONST, {.i64=LANCZOS}, 0, 0, FLAGS, "interp" }, |
| { "lanczos", "lanczos interpolation", 0, AV_OPT_TYPE_CONST, {.i64=LANCZOS}, 0, 0, FLAGS, "interp" }, |
| { "sp16", "spline16 interpolation", 0, AV_OPT_TYPE_CONST, {.i64=SPLINE16}, 0, 0, FLAGS, "interp" }, |
| { "spline16", "spline16 interpolation", 0, AV_OPT_TYPE_CONST, {.i64=SPLINE16}, 0, 0, FLAGS, "interp" }, |
| { "gauss", "gaussian interpolation", 0, AV_OPT_TYPE_CONST, {.i64=GAUSSIAN}, 0, 0, FLAGS, "interp" }, |
| { "gaussian", "gaussian interpolation", 0, AV_OPT_TYPE_CONST, {.i64=GAUSSIAN}, 0, 0, FLAGS, "interp" }, |
| { "w", "output width", OFFSET(width), AV_OPT_TYPE_INT, {.i64=0}, 0, INT16_MAX, FLAGS, "w"}, |
| { "h", "output height", OFFSET(height), AV_OPT_TYPE_INT, {.i64=0}, 0, INT16_MAX, FLAGS, "h"}, |
| { "in_stereo", "input stereo format", OFFSET(in_stereo), AV_OPT_TYPE_INT, {.i64=STEREO_2D}, 0, NB_STEREO_FMTS-1, FLAGS, "stereo" }, |
| {"out_stereo", "output stereo format", OFFSET(out_stereo), AV_OPT_TYPE_INT, {.i64=STEREO_2D}, 0, NB_STEREO_FMTS-1, FLAGS, "stereo" }, |
| { "2d", "2d mono", 0, AV_OPT_TYPE_CONST, {.i64=STEREO_2D}, 0, 0, FLAGS, "stereo" }, |
| { "sbs", "side by side", 0, AV_OPT_TYPE_CONST, {.i64=STEREO_SBS}, 0, 0, FLAGS, "stereo" }, |
| { "tb", "top bottom", 0, AV_OPT_TYPE_CONST, {.i64=STEREO_TB}, 0, 0, FLAGS, "stereo" }, |
| { "in_forder", "input cubemap face order", OFFSET(in_forder), AV_OPT_TYPE_STRING, {.str="rludfb"}, 0, NB_DIRECTIONS-1, FLAGS, "in_forder"}, |
| {"out_forder", "output cubemap face order", OFFSET(out_forder), AV_OPT_TYPE_STRING, {.str="rludfb"}, 0, NB_DIRECTIONS-1, FLAGS, "out_forder"}, |
| { "in_frot", "input cubemap face rotation", OFFSET(in_frot), AV_OPT_TYPE_STRING, {.str="000000"}, 0, NB_DIRECTIONS-1, FLAGS, "in_frot"}, |
| { "out_frot", "output cubemap face rotation",OFFSET(out_frot), AV_OPT_TYPE_STRING, {.str="000000"}, 0, NB_DIRECTIONS-1, FLAGS, "out_frot"}, |
| { "in_pad", "percent input cubemap pads", OFFSET(in_pad), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 1.f,TFLAGS, "in_pad"}, |
| { "out_pad", "percent output cubemap pads", OFFSET(out_pad), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 1.f,TFLAGS, "out_pad"}, |
| { "fin_pad", "fixed input cubemap pads", OFFSET(fin_pad), AV_OPT_TYPE_INT, {.i64=0}, 0, 100,TFLAGS, "fin_pad"}, |
| { "fout_pad", "fixed output cubemap pads", OFFSET(fout_pad), AV_OPT_TYPE_INT, {.i64=0}, 0, 100,TFLAGS, "fout_pad"}, |
| { "yaw", "yaw rotation", OFFSET(yaw), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180.f, 180.f,TFLAGS, "yaw"}, |
| { "pitch", "pitch rotation", OFFSET(pitch), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180.f, 180.f,TFLAGS, "pitch"}, |
| { "roll", "roll rotation", OFFSET(roll), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180.f, 180.f,TFLAGS, "roll"}, |
| { "rorder", "rotation order", OFFSET(rorder), AV_OPT_TYPE_STRING, {.str="ypr"}, 0, 0,TFLAGS, "rorder"}, |
| { "h_fov", "output horizontal field of view",OFFSET(h_fov), AV_OPT_TYPE_FLOAT, {.dbl=90.f}, 0.00001f, 360.f,TFLAGS, "h_fov"}, |
| { "v_fov", "output vertical field of view", OFFSET(v_fov), AV_OPT_TYPE_FLOAT, {.dbl=45.f}, 0.00001f, 360.f,TFLAGS, "v_fov"}, |
| { "d_fov", "output diagonal field of view", OFFSET(d_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 360.f,TFLAGS, "d_fov"}, |
| { "h_flip", "flip out video horizontally", OFFSET(h_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1,TFLAGS, "h_flip"}, |
| { "v_flip", "flip out video vertically", OFFSET(v_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1,TFLAGS, "v_flip"}, |
| { "d_flip", "flip out video indepth", OFFSET(d_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1,TFLAGS, "d_flip"}, |
| { "ih_flip", "flip in video horizontally", OFFSET(ih_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1,TFLAGS, "ih_flip"}, |
| { "iv_flip", "flip in video vertically", OFFSET(iv_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1,TFLAGS, "iv_flip"}, |
| { "in_trans", "transpose video input", OFFSET(in_transpose), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "in_transpose"}, |
| { "out_trans", "transpose video output", OFFSET(out_transpose), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "out_transpose"}, |
| { "ih_fov", "input horizontal field of view",OFFSET(ih_fov), AV_OPT_TYPE_FLOAT, {.dbl=90.f}, 0.00001f, 360.f,TFLAGS, "ih_fov"}, |
| { "iv_fov", "input vertical field of view", OFFSET(iv_fov), AV_OPT_TYPE_FLOAT, {.dbl=45.f}, 0.00001f, 360.f,TFLAGS, "iv_fov"}, |
| { "id_fov", "input diagonal field of view", OFFSET(id_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 360.f,TFLAGS, "id_fov"}, |
| {"alpha_mask", "build mask in alpha plane", OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "alpha"}, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(v360); |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| static const enum AVPixelFormat pix_fmts[] = { |
| // YUVA444 |
| AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P9, |
| AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, |
| AV_PIX_FMT_YUVA444P16, |
| |
| // YUVA422 |
| AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA422P9, |
| AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, |
| AV_PIX_FMT_YUVA422P16, |
| |
| // YUVA420 |
| AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA420P9, |
| AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16, |
| |
| // YUVJ |
| AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, |
| AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, |
| AV_PIX_FMT_YUVJ411P, |
| |
| // YUV444 |
| AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV444P9, |
| AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12, |
| AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16, |
| |
| // YUV440 |
| AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV440P10, |
| AV_PIX_FMT_YUV440P12, |
| |
| // YUV422 |
| AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV422P9, |
| AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12, |
| AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV422P16, |
| |
| // YUV420 |
| AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P9, |
| AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12, |
| AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV420P16, |
| |
| // YUV411 |
| AV_PIX_FMT_YUV411P, |
| |
| // YUV410 |
| AV_PIX_FMT_YUV410P, |
| |
| // GBR |
| AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, |
| AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12, |
| AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
| |
| // GBRA |
| AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, |
| AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
| |
| // GRAY |
| AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, |
| AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, |
| AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, |
| |
| AV_PIX_FMT_NONE |
| }; |
| static const enum AVPixelFormat alpha_pix_fmts[] = { |
| AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P9, |
| AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, |
| AV_PIX_FMT_YUVA444P16, |
| AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA422P9, |
| AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, |
| AV_PIX_FMT_YUVA422P16, |
| AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA420P9, |
| AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16, |
| AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, |
| AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
| AV_PIX_FMT_NONE |
| }; |
| |
| AVFilterFormats *fmts_list = ff_make_format_list(s->alpha ? alpha_pix_fmts : pix_fmts); |
| if (!fmts_list) |
| return AVERROR(ENOMEM); |
| return ff_set_common_formats(ctx, fmts_list); |
| } |
| |
| #define DEFINE_REMAP1_LINE(bits, div) \ |
| static void remap1_##bits##bit_line_c(uint8_t *dst, int width, const uint8_t *const src, \ |
| ptrdiff_t in_linesize, \ |
| const int16_t *const u, const int16_t *const v, \ |
| const int16_t *const ker) \ |
| { \ |
| const uint##bits##_t *const s = (const uint##bits##_t *const)src; \ |
| uint##bits##_t *d = (uint##bits##_t *)dst; \ |
| \ |
| in_linesize /= div; \ |
| \ |
| for (int x = 0; x < width; x++) \ |
| d[x] = s[v[x] * in_linesize + u[x]]; \ |
| } |
| |
| DEFINE_REMAP1_LINE( 8, 1) |
| DEFINE_REMAP1_LINE(16, 2) |
| |
| /** |
| * Generate remapping function with a given window size and pixel depth. |
| * |
| * @param ws size of interpolation window |
| * @param bits number of bits per pixel |
| */ |
| #define DEFINE_REMAP(ws, bits) \ |
| static int remap##ws##_##bits##bit_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \ |
| { \ |
| ThreadData *td = arg; \ |
| const V360Context *s = ctx->priv; \ |
| const AVFrame *in = td->in; \ |
| AVFrame *out = td->out; \ |
| \ |
| for (int stereo = 0; stereo < 1 + s->out_stereo > STEREO_2D; stereo++) { \ |
| for (int plane = 0; plane < s->nb_planes; plane++) { \ |
| const unsigned map = s->map[plane]; \ |
| const int in_linesize = in->linesize[plane]; \ |
| const int out_linesize = out->linesize[plane]; \ |
| const int uv_linesize = s->uv_linesize[plane]; \ |
| const int in_offset_w = stereo ? s->in_offset_w[plane] : 0; \ |
| const int in_offset_h = stereo ? s->in_offset_h[plane] : 0; \ |
| const int out_offset_w = stereo ? s->out_offset_w[plane] : 0; \ |
| const int out_offset_h = stereo ? s->out_offset_h[plane] : 0; \ |
| const uint8_t *const src = in->data[plane] + \ |
| in_offset_h * in_linesize + in_offset_w * (bits >> 3); \ |
| uint8_t *dst = out->data[plane] + out_offset_h * out_linesize + out_offset_w * (bits >> 3); \ |
| const uint8_t *mask = plane == 3 ? s->mask : NULL; \ |
| const int width = s->pr_width[plane]; \ |
| const int height = s->pr_height[plane]; \ |
| \ |
| const int slice_start = (height * jobnr ) / nb_jobs; \ |
| const int slice_end = (height * (jobnr + 1)) / nb_jobs; \ |
| \ |
| for (int y = slice_start; y < slice_end && !mask; y++) { \ |
| const int16_t *const u = s->u[map] + y * uv_linesize * ws * ws; \ |
| const int16_t *const v = s->v[map] + y * uv_linesize * ws * ws; \ |
| const int16_t *const ker = s->ker[map] + y * uv_linesize * ws * ws; \ |
| \ |
| s->remap_line(dst + y * out_linesize, width, src, in_linesize, u, v, ker); \ |
| } \ |
| \ |
| for (int y = slice_start; y < slice_end && mask; y++) { \ |
| memcpy(dst + y * out_linesize, mask + y * width * (bits >> 3), width * (bits >> 3)); \ |
| } \ |
| } \ |
| } \ |
| \ |
| return 0; \ |
| } |
| |
| DEFINE_REMAP(1, 8) |
| DEFINE_REMAP(2, 8) |
| DEFINE_REMAP(3, 8) |
| DEFINE_REMAP(4, 8) |
| DEFINE_REMAP(1, 16) |
| DEFINE_REMAP(2, 16) |
| DEFINE_REMAP(3, 16) |
| DEFINE_REMAP(4, 16) |
| |
| #define DEFINE_REMAP_LINE(ws, bits, div) \ |
| static void remap##ws##_##bits##bit_line_c(uint8_t *dst, int width, const uint8_t *const src, \ |
| ptrdiff_t in_linesize, \ |
| const int16_t *const u, const int16_t *const v, \ |
| const int16_t *const ker) \ |
| { \ |
| const uint##bits##_t *const s = (const uint##bits##_t *const)src; \ |
| uint##bits##_t *d = (uint##bits##_t *)dst; \ |
| \ |
| in_linesize /= div; \ |
| \ |
| for (int x = 0; x < width; x++) { \ |
| const int16_t *const uu = u + x * ws * ws; \ |
| const int16_t *const vv = v + x * ws * ws; \ |
| const int16_t *const kker = ker + x * ws * ws; \ |
| int tmp = 0; \ |
| \ |
| for (int i = 0; i < ws; i++) { \ |
| for (int j = 0; j < ws; j++) { \ |
| tmp += kker[i * ws + j] * s[vv[i * ws + j] * in_linesize + uu[i * ws + j]]; \ |
| } \ |
| } \ |
| \ |
| d[x] = av_clip_uint##bits(tmp >> 14); \ |
| } \ |
| } |
| |
| DEFINE_REMAP_LINE(2, 8, 1) |
| DEFINE_REMAP_LINE(3, 8, 1) |
| DEFINE_REMAP_LINE(4, 8, 1) |
| DEFINE_REMAP_LINE(2, 16, 2) |
| DEFINE_REMAP_LINE(3, 16, 2) |
| DEFINE_REMAP_LINE(4, 16, 2) |
| |
| void ff_v360_init(V360Context *s, int depth) |
| { |
| switch (s->interp) { |
| case NEAREST: |
| s->remap_line = depth <= 8 ? remap1_8bit_line_c : remap1_16bit_line_c; |
| break; |
| case BILINEAR: |
| s->remap_line = depth <= 8 ? remap2_8bit_line_c : remap2_16bit_line_c; |
| break; |
| case LAGRANGE9: |
| s->remap_line = depth <= 8 ? remap3_8bit_line_c : remap3_16bit_line_c; |
| break; |
| case BICUBIC: |
| case LANCZOS: |
| case SPLINE16: |
| case GAUSSIAN: |
| s->remap_line = depth <= 8 ? remap4_8bit_line_c : remap4_16bit_line_c; |
| break; |
| } |
| |
| if (ARCH_X86) |
| ff_v360_init_x86(s, depth); |
| } |
| |
| /** |
| * Save nearest pixel coordinates for remapping. |
| * |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| * @param rmap calculated 4x4 window |
| * @param u u remap data |
| * @param v v remap data |
| * @param ker ker remap data |
| */ |
| static void nearest_kernel(float du, float dv, const XYRemap *rmap, |
| int16_t *u, int16_t *v, int16_t *ker) |
| { |
| const int i = lrintf(dv) + 1; |
| const int j = lrintf(du) + 1; |
| |
| u[0] = rmap->u[i][j]; |
| v[0] = rmap->v[i][j]; |
| } |
| |
| /** |
| * Calculate kernel for bilinear interpolation. |
| * |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| * @param rmap calculated 4x4 window |
| * @param u u remap data |
| * @param v v remap data |
| * @param ker ker remap data |
| */ |
| static void bilinear_kernel(float du, float dv, const XYRemap *rmap, |
| int16_t *u, int16_t *v, int16_t *ker) |
| { |
| for (int i = 0; i < 2; i++) { |
| for (int j = 0; j < 2; j++) { |
| u[i * 2 + j] = rmap->u[i + 1][j + 1]; |
| v[i * 2 + j] = rmap->v[i + 1][j + 1]; |
| } |
| } |
| |
| ker[0] = lrintf((1.f - du) * (1.f - dv) * 16385.f); |
| ker[1] = lrintf( du * (1.f - dv) * 16385.f); |
| ker[2] = lrintf((1.f - du) * dv * 16385.f); |
| ker[3] = lrintf( du * dv * 16385.f); |
| } |
| |
| /** |
| * Calculate 1-dimensional lagrange coefficients. |
| * |
| * @param t relative coordinate |
| * @param coeffs coefficients |
| */ |
| static inline void calculate_lagrange_coeffs(float t, float *coeffs) |
| { |
| coeffs[0] = (t - 1.f) * (t - 2.f) * 0.5f; |
| coeffs[1] = -t * (t - 2.f); |
| coeffs[2] = t * (t - 1.f) * 0.5f; |
| } |
| |
| /** |
| * Calculate kernel for lagrange interpolation. |
| * |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| * @param rmap calculated 4x4 window |
| * @param u u remap data |
| * @param v v remap data |
| * @param ker ker remap data |
| */ |
| static void lagrange_kernel(float du, float dv, const XYRemap *rmap, |
| int16_t *u, int16_t *v, int16_t *ker) |
| { |
| float du_coeffs[3]; |
| float dv_coeffs[3]; |
| |
| calculate_lagrange_coeffs(du, du_coeffs); |
| calculate_lagrange_coeffs(dv, dv_coeffs); |
| |
| for (int i = 0; i < 3; i++) { |
| for (int j = 0; j < 3; j++) { |
| u[i * 3 + j] = rmap->u[i + 1][j + 1]; |
| v[i * 3 + j] = rmap->v[i + 1][j + 1]; |
| ker[i * 3 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f); |
| } |
| } |
| } |
| |
| /** |
| * Calculate 1-dimensional cubic coefficients. |
| * |
| * @param t relative coordinate |
| * @param coeffs coefficients |
| */ |
| static inline void calculate_bicubic_coeffs(float t, float *coeffs) |
| { |
| const float tt = t * t; |
| const float ttt = t * t * t; |
| |
| coeffs[0] = - t / 3.f + tt / 2.f - ttt / 6.f; |
| coeffs[1] = 1.f - t / 2.f - tt + ttt / 2.f; |
| coeffs[2] = t + tt / 2.f - ttt / 2.f; |
| coeffs[3] = - t / 6.f + ttt / 6.f; |
| } |
| |
| /** |
| * Calculate kernel for bicubic interpolation. |
| * |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| * @param rmap calculated 4x4 window |
| * @param u u remap data |
| * @param v v remap data |
| * @param ker ker remap data |
| */ |
| static void bicubic_kernel(float du, float dv, const XYRemap *rmap, |
| int16_t *u, int16_t *v, int16_t *ker) |
| { |
| float du_coeffs[4]; |
| float dv_coeffs[4]; |
| |
| calculate_bicubic_coeffs(du, du_coeffs); |
| calculate_bicubic_coeffs(dv, dv_coeffs); |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| u[i * 4 + j] = rmap->u[i][j]; |
| v[i * 4 + j] = rmap->v[i][j]; |
| ker[i * 4 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f); |
| } |
| } |
| } |
| |
| /** |
| * Calculate 1-dimensional lanczos coefficients. |
| * |
| * @param t relative coordinate |
| * @param coeffs coefficients |
| */ |
| static inline void calculate_lanczos_coeffs(float t, float *coeffs) |
| { |
| float sum = 0.f; |
| |
| for (int i = 0; i < 4; i++) { |
| const float x = M_PI * (t - i + 1); |
| if (x == 0.f) { |
| coeffs[i] = 1.f; |
| } else { |
| coeffs[i] = sinf(x) * sinf(x / 2.f) / (x * x / 2.f); |
| } |
| sum += coeffs[i]; |
| } |
| |
| for (int i = 0; i < 4; i++) { |
| coeffs[i] /= sum; |
| } |
| } |
| |
| /** |
| * Calculate kernel for lanczos interpolation. |
| * |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| * @param rmap calculated 4x4 window |
| * @param u u remap data |
| * @param v v remap data |
| * @param ker ker remap data |
| */ |
| static void lanczos_kernel(float du, float dv, const XYRemap *rmap, |
| int16_t *u, int16_t *v, int16_t *ker) |
| { |
| float du_coeffs[4]; |
| float dv_coeffs[4]; |
| |
| calculate_lanczos_coeffs(du, du_coeffs); |
| calculate_lanczos_coeffs(dv, dv_coeffs); |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| u[i * 4 + j] = rmap->u[i][j]; |
| v[i * 4 + j] = rmap->v[i][j]; |
| ker[i * 4 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f); |
| } |
| } |
| } |
| |
| /** |
| * Calculate 1-dimensional spline16 coefficients. |
| * |
| * @param t relative coordinate |
| * @param coeffs coefficients |
| */ |
| static void calculate_spline16_coeffs(float t, float *coeffs) |
| { |
| coeffs[0] = ((-1.f / 3.f * t + 0.8f) * t - 7.f / 15.f) * t; |
| coeffs[1] = ((t - 9.f / 5.f) * t - 0.2f) * t + 1.f; |
| coeffs[2] = ((6.f / 5.f - t) * t + 0.8f) * t; |
| coeffs[3] = ((1.f / 3.f * t - 0.2f) * t - 2.f / 15.f) * t; |
| } |
| |
| /** |
| * Calculate kernel for spline16 interpolation. |
| * |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| * @param rmap calculated 4x4 window |
| * @param u u remap data |
| * @param v v remap data |
| * @param ker ker remap data |
| */ |
| static void spline16_kernel(float du, float dv, const XYRemap *rmap, |
| int16_t *u, int16_t *v, int16_t *ker) |
| { |
| float du_coeffs[4]; |
| float dv_coeffs[4]; |
| |
| calculate_spline16_coeffs(du, du_coeffs); |
| calculate_spline16_coeffs(dv, dv_coeffs); |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| u[i * 4 + j] = rmap->u[i][j]; |
| v[i * 4 + j] = rmap->v[i][j]; |
| ker[i * 4 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f); |
| } |
| } |
| } |
| |
| /** |
| * Calculate 1-dimensional gaussian coefficients. |
| * |
| * @param t relative coordinate |
| * @param coeffs coefficients |
| */ |
| static void calculate_gaussian_coeffs(float t, float *coeffs) |
| { |
| float sum = 0.f; |
| |
| for (int i = 0; i < 4; i++) { |
| const float x = t - (i - 1); |
| if (x == 0.f) { |
| coeffs[i] = 1.f; |
| } else { |
| coeffs[i] = expf(-2.f * x * x) * expf(-x * x / 2.f); |
| } |
| sum += coeffs[i]; |
| } |
| |
| for (int i = 0; i < 4; i++) { |
| coeffs[i] /= sum; |
| } |
| } |
| |
| /** |
| * Calculate kernel for gaussian interpolation. |
| * |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| * @param rmap calculated 4x4 window |
| * @param u u remap data |
| * @param v v remap data |
| * @param ker ker remap data |
| */ |
| static void gaussian_kernel(float du, float dv, const XYRemap *rmap, |
| int16_t *u, int16_t *v, int16_t *ker) |
| { |
| float du_coeffs[4]; |
| float dv_coeffs[4]; |
| |
| calculate_gaussian_coeffs(du, du_coeffs); |
| calculate_gaussian_coeffs(dv, dv_coeffs); |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| u[i * 4 + j] = rmap->u[i][j]; |
| v[i * 4 + j] = rmap->v[i][j]; |
| ker[i * 4 + j] = lrintf(du_coeffs[j] * dv_coeffs[i] * 16385.f); |
| } |
| } |
| } |
| |
| /** |
| * Modulo operation with only positive remainders. |
| * |
| * @param a dividend |
| * @param b divisor |
| * |
| * @return positive remainder of (a / b) |
| */ |
| static inline int mod(int a, int b) |
| { |
| const int res = a % b; |
| if (res < 0) { |
| return res + b; |
| } else { |
| return res; |
| } |
| } |
| |
| /** |
| * Reflect y operation. |
| * |
| * @param y input vertical position |
| * @param h input height |
| */ |
| static inline int reflecty(int y, int h) |
| { |
| if (y < 0) { |
| return -y; |
| } else if (y >= h) { |
| return 2 * h - 1 - y; |
| } |
| |
| return y; |
| } |
| |
| /** |
| * Reflect x operation for equirect. |
| * |
| * @param x input horizontal position |
| * @param y input vertical position |
| * @param w input width |
| * @param h input height |
| */ |
| static inline int ereflectx(int x, int y, int w, int h) |
| { |
| if (y < 0 || y >= h) |
| x += w / 2; |
| |
| return mod(x, w); |
| } |
| |
| /** |
| * Reflect x operation. |
| * |
| * @param x input horizontal position |
| * @param y input vertical position |
| * @param w input width |
| * @param h input height |
| */ |
| static inline int reflectx(int x, int y, int w, int h) |
| { |
| if (y < 0 || y >= h) |
| return w - 1 - x; |
| |
| return mod(x, w); |
| } |
| |
| /** |
| * Convert char to corresponding direction. |
| * Used for cubemap options. |
| */ |
| static int get_direction(char c) |
| { |
| switch (c) { |
| case 'r': |
| return RIGHT; |
| case 'l': |
| return LEFT; |
| case 'u': |
| return UP; |
| case 'd': |
| return DOWN; |
| case 'f': |
| return FRONT; |
| case 'b': |
| return BACK; |
| default: |
| return -1; |
| } |
| } |
| |
| /** |
| * Convert char to corresponding rotation angle. |
| * Used for cubemap options. |
| */ |
| static int get_rotation(char c) |
| { |
| switch (c) { |
| case '0': |
| return ROT_0; |
| case '1': |
| return ROT_90; |
| case '2': |
| return ROT_180; |
| case '3': |
| return ROT_270; |
| default: |
| return -1; |
| } |
| } |
| |
| /** |
| * Convert char to corresponding rotation order. |
| */ |
| static int get_rorder(char c) |
| { |
| switch (c) { |
| case 'Y': |
| case 'y': |
| return YAW; |
| case 'P': |
| case 'p': |
| return PITCH; |
| case 'R': |
| case 'r': |
| return ROLL; |
| default: |
| return -1; |
| } |
| } |
| |
| /** |
| * Prepare data for processing cubemap input format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_cube_in(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| for (int face = 0; face < NB_FACES; face++) { |
| const char c = s->in_forder[face]; |
| int direction; |
| |
| if (c == '\0') { |
| av_log(ctx, AV_LOG_ERROR, |
| "Incomplete in_forder option. Direction for all 6 faces should be specified.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| direction = get_direction(c); |
| if (direction == -1) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Incorrect direction symbol '%c' in in_forder option.\n", c); |
| return AVERROR(EINVAL); |
| } |
| |
| s->in_cubemap_face_order[direction] = face; |
| } |
| |
| for (int face = 0; face < NB_FACES; face++) { |
| const char c = s->in_frot[face]; |
| int rotation; |
| |
| if (c == '\0') { |
| av_log(ctx, AV_LOG_ERROR, |
| "Incomplete in_frot option. Rotation for all 6 faces should be specified.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| rotation = get_rotation(c); |
| if (rotation == -1) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Incorrect rotation symbol '%c' in in_frot option.\n", c); |
| return AVERROR(EINVAL); |
| } |
| |
| s->in_cubemap_face_rotation[face] = rotation; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Prepare data for processing cubemap output format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_cube_out(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| for (int face = 0; face < NB_FACES; face++) { |
| const char c = s->out_forder[face]; |
| int direction; |
| |
| if (c == '\0') { |
| av_log(ctx, AV_LOG_ERROR, |
| "Incomplete out_forder option. Direction for all 6 faces should be specified.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| direction = get_direction(c); |
| if (direction == -1) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Incorrect direction symbol '%c' in out_forder option.\n", c); |
| return AVERROR(EINVAL); |
| } |
| |
| s->out_cubemap_direction_order[face] = direction; |
| } |
| |
| for (int face = 0; face < NB_FACES; face++) { |
| const char c = s->out_frot[face]; |
| int rotation; |
| |
| if (c == '\0') { |
| av_log(ctx, AV_LOG_ERROR, |
| "Incomplete out_frot option. Rotation for all 6 faces should be specified.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| rotation = get_rotation(c); |
| if (rotation == -1) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Incorrect rotation symbol '%c' in out_frot option.\n", c); |
| return AVERROR(EINVAL); |
| } |
| |
| s->out_cubemap_face_rotation[face] = rotation; |
| } |
| |
| return 0; |
| } |
| |
| static inline void rotate_cube_face(float *uf, float *vf, int rotation) |
| { |
| float tmp; |
| |
| switch (rotation) { |
| case ROT_0: |
| break; |
| case ROT_90: |
| tmp = *uf; |
| *uf = -*vf; |
| *vf = tmp; |
| break; |
| case ROT_180: |
| *uf = -*uf; |
| *vf = -*vf; |
| break; |
| case ROT_270: |
| tmp = -*uf; |
| *uf = *vf; |
| *vf = tmp; |
| break; |
| default: |
| av_assert0(0); |
| } |
| } |
| |
| static inline void rotate_cube_face_inverse(float *uf, float *vf, int rotation) |
| { |
| float tmp; |
| |
| switch (rotation) { |
| case ROT_0: |
| break; |
| case ROT_90: |
| tmp = -*uf; |
| *uf = *vf; |
| *vf = tmp; |
| break; |
| case ROT_180: |
| *uf = -*uf; |
| *vf = -*vf; |
| break; |
| case ROT_270: |
| tmp = *uf; |
| *uf = -*vf; |
| *vf = tmp; |
| break; |
| default: |
| av_assert0(0); |
| } |
| } |
| |
| /** |
| * Normalize vector. |
| * |
| * @param vec vector |
| */ |
| static void normalize_vector(float *vec) |
| { |
| const float norm = sqrtf(vec[0] * vec[0] + vec[1] * vec[1] + vec[2] * vec[2]); |
| |
| vec[0] /= norm; |
| vec[1] /= norm; |
| vec[2] /= norm; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding cubemap position. |
| * Common operation for every cubemap. |
| * |
| * @param s filter private context |
| * @param uf horizontal cubemap coordinate [0, 1) |
| * @param vf vertical cubemap coordinate [0, 1) |
| * @param face face of cubemap |
| * @param vec coordinates on sphere |
| * @param scalew scale for uf |
| * @param scaleh scale for vf |
| */ |
| static void cube_to_xyz(const V360Context *s, |
| float uf, float vf, int face, |
| float *vec, float scalew, float scaleh) |
| { |
| const int direction = s->out_cubemap_direction_order[face]; |
| float l_x, l_y, l_z; |
| |
| uf /= scalew; |
| vf /= scaleh; |
| |
| rotate_cube_face_inverse(&uf, &vf, s->out_cubemap_face_rotation[face]); |
| |
| switch (direction) { |
| case RIGHT: |
| l_x = 1.f; |
| l_y = vf; |
| l_z = -uf; |
| break; |
| case LEFT: |
| l_x = -1.f; |
| l_y = vf; |
| l_z = uf; |
| break; |
| case UP: |
| l_x = uf; |
| l_y = -1.f; |
| l_z = vf; |
| break; |
| case DOWN: |
| l_x = uf; |
| l_y = 1.f; |
| l_z = -vf; |
| break; |
| case FRONT: |
| l_x = uf; |
| l_y = vf; |
| l_z = 1.f; |
| break; |
| case BACK: |
| l_x = -uf; |
| l_y = vf; |
| l_z = -1.f; |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| vec[0] = l_x; |
| vec[1] = l_y; |
| vec[2] = l_z; |
| |
| normalize_vector(vec); |
| } |
| |
| /** |
| * Calculate cubemap position for corresponding 3D coordinates on sphere. |
| * Common operation for every cubemap. |
| * |
| * @param s filter private context |
| * @param vec coordinated on sphere |
| * @param uf horizontal cubemap coordinate [0, 1) |
| * @param vf vertical cubemap coordinate [0, 1) |
| * @param direction direction of view |
| */ |
| static void xyz_to_cube(const V360Context *s, |
| const float *vec, |
| float *uf, float *vf, int *direction) |
| { |
| const float phi = atan2f(vec[0], vec[2]); |
| const float theta = asinf(vec[1]); |
| float phi_norm, theta_threshold; |
| int face; |
| |
| if (phi >= -M_PI_4 && phi < M_PI_4) { |
| *direction = FRONT; |
| phi_norm = phi; |
| } else if (phi >= -(M_PI_2 + M_PI_4) && phi < -M_PI_4) { |
| *direction = LEFT; |
| phi_norm = phi + M_PI_2; |
| } else if (phi >= M_PI_4 && phi < M_PI_2 + M_PI_4) { |
| *direction = RIGHT; |
| phi_norm = phi - M_PI_2; |
| } else { |
| *direction = BACK; |
| phi_norm = phi + ((phi > 0.f) ? -M_PI : M_PI); |
| } |
| |
| theta_threshold = atanf(cosf(phi_norm)); |
| if (theta > theta_threshold) { |
| *direction = DOWN; |
| } else if (theta < -theta_threshold) { |
| *direction = UP; |
| } |
| |
| switch (*direction) { |
| case RIGHT: |
| *uf = -vec[2] / vec[0]; |
| *vf = vec[1] / vec[0]; |
| break; |
| case LEFT: |
| *uf = -vec[2] / vec[0]; |
| *vf = -vec[1] / vec[0]; |
| break; |
| case UP: |
| *uf = -vec[0] / vec[1]; |
| *vf = -vec[2] / vec[1]; |
| break; |
| case DOWN: |
| *uf = vec[0] / vec[1]; |
| *vf = -vec[2] / vec[1]; |
| break; |
| case FRONT: |
| *uf = vec[0] / vec[2]; |
| *vf = vec[1] / vec[2]; |
| break; |
| case BACK: |
| *uf = vec[0] / vec[2]; |
| *vf = -vec[1] / vec[2]; |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| face = s->in_cubemap_face_order[*direction]; |
| rotate_cube_face(uf, vf, s->in_cubemap_face_rotation[face]); |
| |
| (*uf) *= s->input_mirror_modifier[0]; |
| (*vf) *= s->input_mirror_modifier[1]; |
| } |
| |
| /** |
| * Find position on another cube face in case of overflow/underflow. |
| * Used for calculation of interpolation window. |
| * |
| * @param s filter private context |
| * @param uf horizontal cubemap coordinate |
| * @param vf vertical cubemap coordinate |
| * @param direction direction of view |
| * @param new_uf new horizontal cubemap coordinate |
| * @param new_vf new vertical cubemap coordinate |
| * @param face face position on cubemap |
| */ |
| static void process_cube_coordinates(const V360Context *s, |
| float uf, float vf, int direction, |
| float *new_uf, float *new_vf, int *face) |
| { |
| /* |
| * Cubemap orientation |
| * |
| * width |
| * <-------> |
| * +-------+ |
| * | | U |
| * | up | h -------> |
| * +-------+-------+-------+-------+ ^ e | |
| * | | | | | | i V | |
| * | left | front | right | back | | g | |
| * +-------+-------+-------+-------+ v h v |
| * | | t |
| * | down | |
| * +-------+ |
| */ |
| |
| *face = s->in_cubemap_face_order[direction]; |
| rotate_cube_face_inverse(&uf, &vf, s->in_cubemap_face_rotation[*face]); |
| |
| if ((uf < -1.f || uf >= 1.f) && (vf < -1.f || vf >= 1.f)) { |
| // There are no pixels to use in this case |
| *new_uf = uf; |
| *new_vf = vf; |
| } else if (uf < -1.f) { |
| uf += 2.f; |
| switch (direction) { |
| case RIGHT: |
| direction = FRONT; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| case LEFT: |
| direction = BACK; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| case UP: |
| direction = LEFT; |
| *new_uf = vf; |
| *new_vf = -uf; |
| break; |
| case DOWN: |
| direction = LEFT; |
| *new_uf = -vf; |
| *new_vf = uf; |
| break; |
| case FRONT: |
| direction = LEFT; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| case BACK: |
| direction = RIGHT; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| default: |
| av_assert0(0); |
| } |
| } else if (uf >= 1.f) { |
| uf -= 2.f; |
| switch (direction) { |
| case RIGHT: |
| direction = BACK; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| case LEFT: |
| direction = FRONT; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| case UP: |
| direction = RIGHT; |
| *new_uf = -vf; |
| *new_vf = uf; |
| break; |
| case DOWN: |
| direction = RIGHT; |
| *new_uf = vf; |
| *new_vf = -uf; |
| break; |
| case FRONT: |
| direction = RIGHT; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| case BACK: |
| direction = LEFT; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| default: |
| av_assert0(0); |
| } |
| } else if (vf < -1.f) { |
| vf += 2.f; |
| switch (direction) { |
| case RIGHT: |
| direction = UP; |
| *new_uf = vf; |
| *new_vf = -uf; |
| break; |
| case LEFT: |
| direction = UP; |
| *new_uf = -vf; |
| *new_vf = uf; |
| break; |
| case UP: |
| direction = BACK; |
| *new_uf = -uf; |
| *new_vf = -vf; |
| break; |
| case DOWN: |
| direction = FRONT; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| case FRONT: |
| direction = UP; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| case BACK: |
| direction = UP; |
| *new_uf = -uf; |
| *new_vf = -vf; |
| break; |
| default: |
| av_assert0(0); |
| } |
| } else if (vf >= 1.f) { |
| vf -= 2.f; |
| switch (direction) { |
| case RIGHT: |
| direction = DOWN; |
| *new_uf = -vf; |
| *new_vf = uf; |
| break; |
| case LEFT: |
| direction = DOWN; |
| *new_uf = vf; |
| *new_vf = -uf; |
| break; |
| case UP: |
| direction = FRONT; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| case DOWN: |
| direction = BACK; |
| *new_uf = -uf; |
| *new_vf = -vf; |
| break; |
| case FRONT: |
| direction = DOWN; |
| *new_uf = uf; |
| *new_vf = vf; |
| break; |
| case BACK: |
| direction = DOWN; |
| *new_uf = -uf; |
| *new_vf = -vf; |
| break; |
| default: |
| av_assert0(0); |
| } |
| } else { |
| // Inside cube face |
| *new_uf = uf; |
| *new_vf = vf; |
| } |
| |
| *face = s->in_cubemap_face_order[direction]; |
| rotate_cube_face(new_uf, new_vf, s->in_cubemap_face_rotation[*face]); |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in cubemap3x2 format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int cube3x2_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (width / 3.f) : 1.f - s->out_pad; |
| const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 2.f) : 1.f - s->out_pad; |
| |
| const float ew = width / 3.f; |
| const float eh = height / 2.f; |
| |
| const int u_face = floorf(i / ew); |
| const int v_face = floorf(j / eh); |
| const int face = u_face + 3 * v_face; |
| |
| const int u_shift = ceilf(ew * u_face); |
| const int v_shift = ceilf(eh * v_face); |
| const int ewi = ceilf(ew * (u_face + 1)) - u_shift; |
| const int ehi = ceilf(eh * (v_face + 1)) - v_shift; |
| |
| const float uf = 2.f * (i - u_shift + 0.5f) / ewi - 1.f; |
| const float vf = 2.f * (j - v_shift + 0.5f) / ehi - 1.f; |
| |
| cube_to_xyz(s, uf, vf, face, vec, scalew, scaleh); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in cubemap3x2 format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float scalew = s->fin_pad > 0 ? 1.f - s->fin_pad / (width / 3.f) : 1.f - s->in_pad; |
| const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (height / 2.f) : 1.f - s->in_pad; |
| const float ew = width / 3.f; |
| const float eh = height / 2.f; |
| float uf, vf; |
| int ui, vi; |
| int ewi, ehi; |
| int direction, face; |
| int u_face, v_face; |
| |
| xyz_to_cube(s, vec, &uf, &vf, &direction); |
| |
| uf *= scalew; |
| vf *= scaleh; |
| |
| face = s->in_cubemap_face_order[direction]; |
| u_face = face % 3; |
| v_face = face / 3; |
| ewi = ceilf(ew * (u_face + 1)) - ceilf(ew * u_face); |
| ehi = ceilf(eh * (v_face + 1)) - ceilf(eh * v_face); |
| |
| uf = 0.5f * ewi * (uf + 1.f) - 0.5f; |
| vf = 0.5f * ehi * (vf + 1.f) - 0.5f; |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| int new_ui = ui + j - 1; |
| int new_vi = vi + i - 1; |
| int u_shift, v_shift; |
| int new_ewi, new_ehi; |
| |
| if (new_ui >= 0 && new_ui < ewi && new_vi >= 0 && new_vi < ehi) { |
| face = s->in_cubemap_face_order[direction]; |
| |
| u_face = face % 3; |
| v_face = face / 3; |
| u_shift = ceilf(ew * u_face); |
| v_shift = ceilf(eh * v_face); |
| } else { |
| uf = 2.f * new_ui / ewi - 1.f; |
| vf = 2.f * new_vi / ehi - 1.f; |
| |
| uf /= scalew; |
| vf /= scaleh; |
| |
| process_cube_coordinates(s, uf, vf, direction, &uf, &vf, &face); |
| |
| uf *= scalew; |
| vf *= scaleh; |
| |
| u_face = face % 3; |
| v_face = face / 3; |
| u_shift = ceilf(ew * u_face); |
| v_shift = ceilf(eh * v_face); |
| new_ewi = ceilf(ew * (u_face + 1)) - u_shift; |
| new_ehi = ceilf(eh * (v_face + 1)) - v_shift; |
| |
| new_ui = av_clip(lrintf(0.5f * new_ewi * (uf + 1.f)), 0, new_ewi - 1); |
| new_vi = av_clip(lrintf(0.5f * new_ehi * (vf + 1.f)), 0, new_ehi - 1); |
| } |
| |
| us[i][j] = u_shift + new_ui; |
| vs[i][j] = v_shift + new_vi; |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in cubemap1x6 format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int cube1x6_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float scalew = s->fout_pad > 0 ? 1.f - (float)(s->fout_pad) / width : 1.f - s->out_pad; |
| const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 6.f) : 1.f - s->out_pad; |
| |
| const float ew = width; |
| const float eh = height / 6.f; |
| |
| const int face = floorf(j / eh); |
| |
| const int v_shift = ceilf(eh * face); |
| const int ehi = ceilf(eh * (face + 1)) - v_shift; |
| |
| const float uf = 2.f * (i + 0.5f) / ew - 1.f; |
| const float vf = 2.f * (j - v_shift + 0.5f) / ehi - 1.f; |
| |
| cube_to_xyz(s, uf, vf, face, vec, scalew, scaleh); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in cubemap6x1 format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int cube6x1_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (width / 6.f) : 1.f - s->out_pad; |
| const float scaleh = s->fout_pad > 0 ? 1.f - (float)(s->fout_pad) / height : 1.f - s->out_pad; |
| |
| const float ew = width / 6.f; |
| const float eh = height; |
| |
| const int face = floorf(i / ew); |
| |
| const int u_shift = ceilf(ew * face); |
| const int ewi = ceilf(ew * (face + 1)) - u_shift; |
| |
| const float uf = 2.f * (i - u_shift + 0.5f) / ewi - 1.f; |
| const float vf = 2.f * (j + 0.5f) / eh - 1.f; |
| |
| cube_to_xyz(s, uf, vf, face, vec, scalew, scaleh); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in cubemap1x6 format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float scalew = s->fin_pad > 0 ? 1.f - (float)(s->fin_pad) / width : 1.f - s->in_pad; |
| const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (height / 6.f) : 1.f - s->in_pad; |
| const float eh = height / 6.f; |
| const int ewi = width; |
| float uf, vf; |
| int ui, vi; |
| int ehi; |
| int direction, face; |
| |
| xyz_to_cube(s, vec, &uf, &vf, &direction); |
| |
| uf *= scalew; |
| vf *= scaleh; |
| |
| face = s->in_cubemap_face_order[direction]; |
| ehi = ceilf(eh * (face + 1)) - ceilf(eh * face); |
| |
| uf = 0.5f * ewi * (uf + 1.f) - 0.5f; |
| vf = 0.5f * ehi * (vf + 1.f) - 0.5f; |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| int new_ui = ui + j - 1; |
| int new_vi = vi + i - 1; |
| int v_shift; |
| int new_ehi; |
| |
| if (new_ui >= 0 && new_ui < ewi && new_vi >= 0 && new_vi < ehi) { |
| face = s->in_cubemap_face_order[direction]; |
| |
| v_shift = ceilf(eh * face); |
| } else { |
| uf = 2.f * new_ui / ewi - 1.f; |
| vf = 2.f * new_vi / ehi - 1.f; |
| |
| uf /= scalew; |
| vf /= scaleh; |
| |
| process_cube_coordinates(s, uf, vf, direction, &uf, &vf, &face); |
| |
| uf *= scalew; |
| vf *= scaleh; |
| |
| v_shift = ceilf(eh * face); |
| new_ehi = ceilf(eh * (face + 1)) - v_shift; |
| |
| new_ui = av_clip(lrintf(0.5f * ewi * (uf + 1.f)), 0, ewi - 1); |
| new_vi = av_clip(lrintf(0.5f * new_ehi * (vf + 1.f)), 0, new_ehi - 1); |
| } |
| |
| us[i][j] = new_ui; |
| vs[i][j] = v_shift + new_vi; |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in cubemap6x1 format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float scalew = s->fin_pad > 0 ? 1.f - s->fin_pad / (width / 6.f) : 1.f - s->in_pad; |
| const float scaleh = s->fin_pad > 0 ? 1.f - (float)(s->fin_pad) / height : 1.f - s->in_pad; |
| const float ew = width / 6.f; |
| const int ehi = height; |
| float uf, vf; |
| int ui, vi; |
| int ewi; |
| int direction, face; |
| |
| xyz_to_cube(s, vec, &uf, &vf, &direction); |
| |
| uf *= scalew; |
| vf *= scaleh; |
| |
| face = s->in_cubemap_face_order[direction]; |
| ewi = ceilf(ew * (face + 1)) - ceilf(ew * face); |
| |
| uf = 0.5f * ewi * (uf + 1.f) - 0.5f; |
| vf = 0.5f * ehi * (vf + 1.f) - 0.5f; |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| int new_ui = ui + j - 1; |
| int new_vi = vi + i - 1; |
| int u_shift; |
| int new_ewi; |
| |
| if (new_ui >= 0 && new_ui < ewi && new_vi >= 0 && new_vi < ehi) { |
| face = s->in_cubemap_face_order[direction]; |
| |
| u_shift = ceilf(ew * face); |
| } else { |
| uf = 2.f * new_ui / ewi - 1.f; |
| vf = 2.f * new_vi / ehi - 1.f; |
| |
| uf /= scalew; |
| vf /= scaleh; |
| |
| process_cube_coordinates(s, uf, vf, direction, &uf, &vf, &face); |
| |
| uf *= scalew; |
| vf *= scaleh; |
| |
| u_shift = ceilf(ew * face); |
| new_ewi = ceilf(ew * (face + 1)) - u_shift; |
| |
| new_ui = av_clip(lrintf(0.5f * new_ewi * (uf + 1.f)), 0, new_ewi - 1); |
| new_vi = av_clip(lrintf(0.5f * ehi * (vf + 1.f)), 0, ehi - 1); |
| } |
| |
| us[i][j] = u_shift + new_ui; |
| vs[i][j] = new_vi; |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in equirectangular format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int equirect_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float phi = ((2.f * i + 0.5f) / width - 1.f) * M_PI; |
| const float theta = ((2.f * j + 0.5f) / height - 1.f) * M_PI_2; |
| |
| const float sin_phi = sinf(phi); |
| const float cos_phi = cosf(phi); |
| const float sin_theta = sinf(theta); |
| const float cos_theta = cosf(theta); |
| |
| vec[0] = cos_theta * sin_phi; |
| vec[1] = sin_theta; |
| vec[2] = cos_theta * cos_phi; |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in half equirectangular format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int hequirect_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float phi = ((2.f * i + 0.5f) / width - 1.f) * M_PI_2; |
| const float theta = ((2.f * j + 0.5f) / height - 1.f) * M_PI_2; |
| |
| const float sin_phi = sinf(phi); |
| const float cos_phi = cosf(phi); |
| const float sin_theta = sinf(theta); |
| const float cos_theta = cosf(theta); |
| |
| vec[0] = cos_theta * sin_phi; |
| vec[1] = sin_theta; |
| vec[2] = cos_theta * cos_phi; |
| |
| return 1; |
| } |
| |
| /** |
| * Prepare data for processing stereographic output format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_stereographic_out(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| s->flat_range[0] = tanf(FFMIN(s->h_fov, 359.f) * M_PI / 720.f); |
| s->flat_range[1] = tanf(FFMIN(s->v_fov, 359.f) * M_PI / 720.f); |
| |
| return 0; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in stereographic format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int stereographic_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float x = ((2.f * i + 1.f) / width - 1.f) * s->flat_range[0]; |
| const float y = ((2.f * j + 1.f) / height - 1.f) * s->flat_range[1]; |
| const float r = hypotf(x, y); |
| const float theta = atanf(r) * 2.f; |
| const float sin_theta = sinf(theta); |
| |
| vec[0] = x / r * sin_theta; |
| vec[1] = y / r * sin_theta; |
| vec[2] = cosf(theta); |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Prepare data for processing stereographic input format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_stereographic_in(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| s->iflat_range[0] = tanf(FFMIN(s->ih_fov, 359.f) * M_PI / 720.f); |
| s->iflat_range[1] = tanf(FFMIN(s->iv_fov, 359.f) * M_PI / 720.f); |
| |
| return 0; |
| } |
| |
| /** |
| * Calculate frame position in stereographic format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float theta = acosf(vec[2]); |
| const float r = tanf(theta * 0.5f); |
| const float c = r / hypotf(vec[0], vec[1]); |
| const float x = vec[0] * c / s->iflat_range[0] * s->input_mirror_modifier[0]; |
| const float y = vec[1] * c / s->iflat_range[1] * s->input_mirror_modifier[1]; |
| |
| const float uf = (x + 1.f) * width / 2.f; |
| const float vf = (y + 1.f) * height / 2.f; |
| |
| const int ui = floorf(uf); |
| const int vi = floorf(vf); |
| |
| const int visible = isfinite(x) && isfinite(y) && vi >= 0 && vi < height && ui >= 0 && ui < width; |
| |
| *du = visible ? uf - ui : 0.f; |
| *dv = visible ? vf - vi : 0.f; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0; |
| vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0; |
| } |
| } |
| |
| return visible; |
| } |
| |
| /** |
| * Calculate frame position in equirectangular format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float phi = atan2f(vec[0], vec[2]) * s->input_mirror_modifier[0]; |
| const float theta = asinf(vec[1]) * s->input_mirror_modifier[1]; |
| |
| const float uf = (phi / M_PI + 1.f) * width / 2.f; |
| const float vf = (theta / M_PI_2 + 1.f) * height / 2.f; |
| |
| const int ui = floorf(uf); |
| const int vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = ereflectx(ui + j - 1, vi + i - 1, width, height); |
| vs[i][j] = reflecty(vi + i - 1, height); |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in half equirectangular format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float phi = atan2f(vec[0], vec[2]) * s->input_mirror_modifier[0]; |
| const float theta = asinf(vec[1]) * s->input_mirror_modifier[1]; |
| |
| const float uf = (phi / M_PI_2 + 1.f) * width / 2.f; |
| const float vf = (theta / M_PI_2 + 1.f) * height / 2.f; |
| |
| const int ui = floorf(uf); |
| const int vi = floorf(vf); |
| |
| const int visible = phi >= -M_PI_2 && phi <= M_PI_2; |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = av_clip(ui + j - 1, 0, width - 1); |
| vs[i][j] = av_clip(vi + i - 1, 0, height - 1); |
| } |
| } |
| |
| return visible; |
| } |
| |
| /** |
| * Prepare data for processing flat input format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_flat_in(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| s->iflat_range[0] = tanf(0.5f * s->ih_fov * M_PI / 180.f); |
| s->iflat_range[1] = tanf(0.5f * s->iv_fov * M_PI / 180.f); |
| |
| return 0; |
| } |
| |
| /** |
| * Calculate frame position in flat format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float theta = acosf(vec[2]); |
| const float r = tanf(theta); |
| const float rr = fabsf(r) < 1e+6f ? r : hypotf(width, height); |
| const float zf = vec[2]; |
| const float h = hypotf(vec[0], vec[1]); |
| const float c = h <= 1e-6f ? 1.f : rr / h; |
| float uf = vec[0] * c / s->iflat_range[0] * s->input_mirror_modifier[0]; |
| float vf = vec[1] * c / s->iflat_range[1] * s->input_mirror_modifier[1]; |
| int visible, ui, vi; |
| |
| uf = zf >= 0.f ? (uf + 1.f) * width / 2.f : 0.f; |
| vf = zf >= 0.f ? (vf + 1.f) * height / 2.f : 0.f; |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| visible = vi >= 0 && vi < height && ui >= 0 && ui < width && zf >= 0.f; |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0; |
| vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0; |
| } |
| } |
| |
| return visible; |
| } |
| |
| /** |
| * Calculate frame position in mercator format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float phi = atan2f(vec[0], vec[2]) * s->input_mirror_modifier[0]; |
| const float theta = vec[1] * s->input_mirror_modifier[1]; |
| |
| const float uf = (phi / M_PI + 1.f) * width / 2.f; |
| const float vf = (av_clipf(logf((1.f + theta) / (1.f - theta)) / (2.f * M_PI), -1.f, 1.f) + 1.f) * height / 2.f; |
| |
| const int ui = floorf(uf); |
| const int vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = av_clip(ui + j - 1, 0, width - 1); |
| vs[i][j] = av_clip(vi + i - 1, 0, height - 1); |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in mercator format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int mercator_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float phi = ((2.f * i + 1.f) / width - 1.f) * M_PI + M_PI_2; |
| const float y = ((2.f * j + 1.f) / height - 1.f) * M_PI; |
| const float div = expf(2.f * y) + 1.f; |
| |
| const float sin_phi = sinf(phi); |
| const float cos_phi = cosf(phi); |
| const float sin_theta = 2.f * expf(y) / div; |
| const float cos_theta = (expf(2.f * y) - 1.f) / div; |
| |
| vec[0] = -sin_theta * cos_phi; |
| vec[1] = cos_theta; |
| vec[2] = sin_theta * sin_phi; |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in ball format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float l = hypotf(vec[0], vec[1]); |
| const float r = sqrtf(1.f - vec[2]) / M_SQRT2; |
| |
| const float uf = (1.f + r * vec[0] * s->input_mirror_modifier[0] / (l > 0.f ? l : 1.f)) * width * 0.5f; |
| const float vf = (1.f + r * vec[1] * s->input_mirror_modifier[1] / (l > 0.f ? l : 1.f)) * height * 0.5f; |
| |
| const int ui = floorf(uf); |
| const int vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = av_clip(ui + j - 1, 0, width - 1); |
| vs[i][j] = av_clip(vi + i - 1, 0, height - 1); |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in ball format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int ball_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float x = (2.f * i + 1.f) / width - 1.f; |
| const float y = (2.f * j + 1.f) / height - 1.f; |
| const float l = hypotf(x, y); |
| |
| if (l <= 1.f) { |
| const float z = 2.f * l * sqrtf(1.f - l * l); |
| |
| vec[0] = z * x / (l > 0.f ? l : 1.f); |
| vec[1] = z * y / (l > 0.f ? l : 1.f); |
| vec[2] = 1.f - 2.f * l * l; |
| } else { |
| vec[0] = 0.f; |
| vec[1] = 1.f; |
| vec[2] = 0.f; |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in hammer format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int hammer_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float x = ((2.f * i + 1.f) / width - 1.f); |
| const float y = ((2.f * j + 1.f) / height - 1.f); |
| |
| const float xx = x * x; |
| const float yy = y * y; |
| |
| const float z = sqrtf(1.f - xx * 0.5f - yy * 0.5f); |
| |
| const float a = M_SQRT2 * x * z; |
| const float b = 2.f * z * z - 1.f; |
| |
| const float aa = a * a; |
| const float bb = b * b; |
| |
| const float w = sqrtf(1.f - 2.f * yy * z * z); |
| |
| vec[0] = w * 2.f * a * b / (aa + bb); |
| vec[1] = M_SQRT2 * y * z; |
| vec[2] = w * (bb - aa) / (aa + bb); |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in hammer format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float theta = atan2f(vec[0], vec[2]) * s->input_mirror_modifier[0]; |
| |
| const float z = sqrtf(1.f + sqrtf(1.f - vec[1] * vec[1]) * cosf(theta * 0.5f)); |
| const float x = sqrtf(1.f - vec[1] * vec[1]) * sinf(theta * 0.5f) / z; |
| const float y = vec[1] / z * s->input_mirror_modifier[1]; |
| |
| const float uf = (x + 1.f) * width / 2.f; |
| const float vf = (y + 1.f) * height / 2.f; |
| |
| const int ui = floorf(uf); |
| const int vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = av_clip(ui + j - 1, 0, width - 1); |
| vs[i][j] = av_clip(vi + i - 1, 0, height - 1); |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in sinusoidal format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int sinusoidal_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float theta = ((2.f * j + 1.f) / height - 1.f) * M_PI_2; |
| const float phi = ((2.f * i + 1.f) / width - 1.f) * M_PI / cosf(theta); |
| |
| const float sin_phi = sinf(phi); |
| const float cos_phi = cosf(phi); |
| const float sin_theta = sinf(theta); |
| const float cos_theta = cosf(theta); |
| |
| vec[0] = cos_theta * sin_phi; |
| vec[1] = sin_theta; |
| vec[2] = cos_theta * cos_phi; |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in sinusoidal format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float theta = asinf(vec[1]) * s->input_mirror_modifier[1]; |
| const float phi = atan2f(vec[0], vec[2]) * s->input_mirror_modifier[0] * cosf(theta); |
| |
| const float uf = (phi / M_PI + 1.f) * width / 2.f; |
| const float vf = (theta / M_PI_2 + 1.f) * height / 2.f; |
| |
| const int ui = floorf(uf); |
| const int vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = av_clip(ui + j - 1, 0, width - 1); |
| vs[i][j] = av_clip(vi + i - 1, 0, height - 1); |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Prepare data for processing equi-angular cubemap input format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_eac_in(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| if (s->ih_flip && s->iv_flip) { |
| s->in_cubemap_face_order[RIGHT] = BOTTOM_LEFT; |
| s->in_cubemap_face_order[LEFT] = BOTTOM_RIGHT; |
| s->in_cubemap_face_order[UP] = TOP_LEFT; |
| s->in_cubemap_face_order[DOWN] = TOP_RIGHT; |
| s->in_cubemap_face_order[FRONT] = BOTTOM_MIDDLE; |
| s->in_cubemap_face_order[BACK] = TOP_MIDDLE; |
| } else if (s->ih_flip) { |
| s->in_cubemap_face_order[RIGHT] = TOP_LEFT; |
| s->in_cubemap_face_order[LEFT] = TOP_RIGHT; |
| s->in_cubemap_face_order[UP] = BOTTOM_LEFT; |
| s->in_cubemap_face_order[DOWN] = BOTTOM_RIGHT; |
| s->in_cubemap_face_order[FRONT] = TOP_MIDDLE; |
| s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE; |
| } else if (s->iv_flip) { |
| s->in_cubemap_face_order[RIGHT] = BOTTOM_RIGHT; |
| s->in_cubemap_face_order[LEFT] = BOTTOM_LEFT; |
| s->in_cubemap_face_order[UP] = TOP_RIGHT; |
| s->in_cubemap_face_order[DOWN] = TOP_LEFT; |
| s->in_cubemap_face_order[FRONT] = BOTTOM_MIDDLE; |
| s->in_cubemap_face_order[BACK] = TOP_MIDDLE; |
| } else { |
| s->in_cubemap_face_order[RIGHT] = TOP_RIGHT; |
| s->in_cubemap_face_order[LEFT] = TOP_LEFT; |
| s->in_cubemap_face_order[UP] = BOTTOM_RIGHT; |
| s->in_cubemap_face_order[DOWN] = BOTTOM_LEFT; |
| s->in_cubemap_face_order[FRONT] = TOP_MIDDLE; |
| s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE; |
| } |
| |
| if (s->iv_flip) { |
| s->in_cubemap_face_rotation[TOP_LEFT] = ROT_270; |
| s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_90; |
| s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_270; |
| s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_0; |
| s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_0; |
| s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_0; |
| } else { |
| s->in_cubemap_face_rotation[TOP_LEFT] = ROT_0; |
| s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_0; |
| s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_0; |
| s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_270; |
| s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_90; |
| s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_270; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Prepare data for processing equi-angular cubemap output format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_eac_out(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| s->out_cubemap_direction_order[TOP_LEFT] = LEFT; |
| s->out_cubemap_direction_order[TOP_MIDDLE] = FRONT; |
| s->out_cubemap_direction_order[TOP_RIGHT] = RIGHT; |
| s->out_cubemap_direction_order[BOTTOM_LEFT] = DOWN; |
| s->out_cubemap_direction_order[BOTTOM_MIDDLE] = BACK; |
| s->out_cubemap_direction_order[BOTTOM_RIGHT] = UP; |
| |
| s->out_cubemap_face_rotation[TOP_LEFT] = ROT_0; |
| s->out_cubemap_face_rotation[TOP_MIDDLE] = ROT_0; |
| s->out_cubemap_face_rotation[TOP_RIGHT] = ROT_0; |
| s->out_cubemap_face_rotation[BOTTOM_LEFT] = ROT_270; |
| s->out_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_90; |
| s->out_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_270; |
| |
| return 0; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in equi-angular cubemap format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int eac_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float pixel_pad = 2; |
| const float u_pad = pixel_pad / width; |
| const float v_pad = pixel_pad / height; |
| |
| int u_face, v_face, face; |
| |
| float l_x, l_y, l_z; |
| |
| float uf = (i + 0.5f) / width; |
| float vf = (j + 0.5f) / height; |
| |
| // EAC has 2-pixel padding on faces except between faces on the same row |
| // Padding pixels seems not to be stretched with tangent as regular pixels |
| // Formulas below approximate original padding as close as I could get experimentally |
| |
| // Horizontal padding |
| uf = 3.f * (uf - u_pad) / (1.f - 2.f * u_pad); |
| if (uf < 0.f) { |
| u_face = 0; |
| uf -= 0.5f; |
| } else if (uf >= 3.f) { |
| u_face = 2; |
| uf -= 2.5f; |
| } else { |
| u_face = floorf(uf); |
| uf = fmodf(uf, 1.f) - 0.5f; |
| } |
| |
| // Vertical padding |
| v_face = floorf(vf * 2.f); |
| vf = (vf - v_pad - 0.5f * v_face) / (0.5f - 2.f * v_pad) - 0.5f; |
| |
| if (uf >= -0.5f && uf < 0.5f) { |
| uf = tanf(M_PI_2 * uf); |
| } else { |
| uf = 2.f * uf; |
| } |
| if (vf >= -0.5f && vf < 0.5f) { |
| vf = tanf(M_PI_2 * vf); |
| } else { |
| vf = 2.f * vf; |
| } |
| |
| face = u_face + 3 * v_face; |
| |
| switch (face) { |
| case TOP_LEFT: |
| l_x = -1.f; |
| l_y = vf; |
| l_z = uf; |
| break; |
| case TOP_MIDDLE: |
| l_x = uf; |
| l_y = vf; |
| l_z = 1.f; |
| break; |
| case TOP_RIGHT: |
| l_x = 1.f; |
| l_y = vf; |
| l_z = -uf; |
| break; |
| case BOTTOM_LEFT: |
| l_x = -vf; |
| l_y = 1.f; |
| l_z = -uf; |
| break; |
| case BOTTOM_MIDDLE: |
| l_x = -vf; |
| l_y = -uf; |
| l_z = -1.f; |
| break; |
| case BOTTOM_RIGHT: |
| l_x = -vf; |
| l_y = -1.f; |
| l_z = uf; |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| vec[0] = l_x; |
| vec[1] = l_y; |
| vec[2] = l_z; |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in equi-angular cubemap format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float pixel_pad = 2; |
| const float u_pad = pixel_pad / width; |
| const float v_pad = pixel_pad / height; |
| |
| float uf, vf; |
| int ui, vi; |
| int direction, face; |
| int u_face, v_face; |
| |
| xyz_to_cube(s, vec, &uf, &vf, &direction); |
| |
| face = s->in_cubemap_face_order[direction]; |
| u_face = face % 3; |
| v_face = face / 3; |
| |
| uf = M_2_PI * atanf(uf) + 0.5f; |
| vf = M_2_PI * atanf(vf) + 0.5f; |
| |
| // These formulas are inversed from eac_to_xyz ones |
| uf = (uf + u_face) * (1.f - 2.f * u_pad) / 3.f + u_pad; |
| vf = vf * (0.5f - 2.f * v_pad) + v_pad + 0.5f * v_face; |
| |
| uf *= width; |
| vf *= height; |
| |
| uf -= 0.5f; |
| vf -= 0.5f; |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = av_clip(ui + j - 1, 0, width - 1); |
| vs[i][j] = av_clip(vi + i - 1, 0, height - 1); |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Prepare data for processing flat output format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_flat_out(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| s->flat_range[0] = tanf(0.5f * s->h_fov * M_PI / 180.f); |
| s->flat_range[1] = tanf(0.5f * s->v_fov * M_PI / 180.f); |
| |
| return 0; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in flat format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int flat_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float l_x = s->flat_range[0] * ((2.f * i + 0.5f) / width - 1.f); |
| const float l_y = s->flat_range[1] * ((2.f * j + 0.5f) / height - 1.f); |
| |
| vec[0] = l_x; |
| vec[1] = l_y; |
| vec[2] = 1.f; |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Prepare data for processing fisheye output format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_fisheye_out(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| s->flat_range[0] = s->h_fov / 180.f; |
| s->flat_range[1] = s->v_fov / 180.f; |
| |
| return 0; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in fisheye format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int fisheye_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float uf = s->flat_range[0] * ((2.f * i) / width - 1.f); |
| const float vf = s->flat_range[1] * ((2.f * j + 1.f) / height - 1.f); |
| |
| const float phi = atan2f(vf, uf); |
| const float theta = M_PI_2 * (1.f - hypotf(uf, vf)); |
| |
| const float sin_phi = sinf(phi); |
| const float cos_phi = cosf(phi); |
| const float sin_theta = sinf(theta); |
| const float cos_theta = cosf(theta); |
| |
| vec[0] = cos_theta * cos_phi; |
| vec[1] = cos_theta * sin_phi; |
| vec[2] = sin_theta; |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Prepare data for processing fisheye input format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_fisheye_in(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| s->iflat_range[0] = s->ih_fov / 180.f; |
| s->iflat_range[1] = s->iv_fov / 180.f; |
| |
| return 0; |
| } |
| |
| /** |
| * Calculate frame position in fisheye format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float h = hypotf(vec[0], vec[1]); |
| const float lh = h > 0.f ? h : 1.f; |
| const float phi = atan2f(h, vec[2]) / M_PI; |
| |
| float uf = vec[0] / lh * phi * s->input_mirror_modifier[0] / s->iflat_range[0]; |
| float vf = vec[1] / lh * phi * s->input_mirror_modifier[1] / s->iflat_range[1]; |
| |
| const int visible = hypotf(uf, vf) <= 0.5f; |
| int ui, vi; |
| |
| uf = (uf + 0.5f) * width; |
| vf = (vf + 0.5f) * height; |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| *du = visible ? uf - ui : 0.f; |
| *dv = visible ? vf - vi : 0.f; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0; |
| vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0; |
| } |
| } |
| |
| return visible; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in pannini format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int pannini_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float uf = ((2.f * i + 1.f) / width - 1.f); |
| const float vf = ((2.f * j + 1.f) / height - 1.f); |
| |
| const float d = s->h_fov; |
| const float k = uf * uf / ((d + 1.f) * (d + 1.f)); |
| const float dscr = k * k * d * d - (k + 1.f) * (k * d * d - 1.f); |
| const float clon = (-k * d + sqrtf(dscr)) / (k + 1.f); |
| const float S = (d + 1.f) / (d + clon); |
| const float lon = atan2f(uf, S * clon); |
| const float lat = atan2f(vf, S); |
| |
| vec[0] = sinf(lon) * cosf(lat); |
| vec[1] = sinf(lat); |
| vec[2] = cosf(lon) * cosf(lat); |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in pannini format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float phi = atan2f(vec[0], vec[2]) * s->input_mirror_modifier[0]; |
| const float theta = asinf(vec[1]) * s->input_mirror_modifier[1]; |
| |
| const float d = s->ih_fov; |
| const float S = (d + 1.f) / (d + cosf(phi)); |
| |
| const float x = S * sinf(phi); |
| const float y = S * tanf(theta); |
| |
| const float uf = (x + 1.f) * width / 2.f; |
| const float vf = (y + 1.f) * height / 2.f; |
| |
| const int ui = floorf(uf); |
| const int vi = floorf(vf); |
| |
| const int visible = vi >= 0 && vi < height && ui >= 0 && ui < width && vec[2] >= 0.f; |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0; |
| vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0; |
| } |
| } |
| |
| return visible; |
| } |
| |
| /** |
| * Prepare data for processing cylindrical output format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_cylindrical_out(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| s->flat_range[0] = M_PI * s->h_fov / 360.f; |
| s->flat_range[1] = tanf(0.5f * s->v_fov * M_PI / 180.f); |
| |
| return 0; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in cylindrical format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int cylindrical_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float uf = s->flat_range[0] * ((2.f * i + 1.f) / width - 1.f); |
| const float vf = s->flat_range[1] * ((2.f * j + 1.f) / height - 1.f); |
| |
| const float phi = uf; |
| const float theta = atanf(vf); |
| |
| const float sin_phi = sinf(phi); |
| const float cos_phi = cosf(phi); |
| const float sin_theta = sinf(theta); |
| const float cos_theta = cosf(theta); |
| |
| vec[0] = cos_theta * sin_phi; |
| vec[1] = sin_theta; |
| vec[2] = cos_theta * cos_phi; |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Prepare data for processing cylindrical input format. |
| * |
| * @param ctx filter context |
| * |
| * @return error code |
| */ |
| static int prepare_cylindrical_in(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| s->iflat_range[0] = M_PI * s->ih_fov / 360.f; |
| s->iflat_range[1] = tanf(0.5f * s->iv_fov * M_PI / 180.f); |
| |
| return 0; |
| } |
| |
| /** |
| * Calculate frame position in cylindrical format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float phi = atan2f(vec[0], vec[2]) * s->input_mirror_modifier[0] / s->iflat_range[0]; |
| const float theta = asinf(vec[1]) * s->input_mirror_modifier[1]; |
| |
| const float uf = (phi + 1.f) * (width - 1) / 2.f; |
| const float vf = (tanf(theta) / s->iflat_range[1] + 1.f) * height / 2.f; |
| |
| const int ui = floorf(uf); |
| const int vi = floorf(vf); |
| |
| const int visible = vi >= 0 && vi < height && ui >= 0 && ui < width && |
| theta <= M_PI * s->iv_fov / 180.f && |
| theta >= -M_PI * s->iv_fov / 180.f; |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = visible ? av_clip(ui + j - 1, 0, width - 1) : 0; |
| vs[i][j] = visible ? av_clip(vi + i - 1, 0, height - 1) : 0; |
| } |
| } |
| |
| return visible; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in perspective format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int perspective_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float uf = ((2.f * i + 1.f) / width - 1.f); |
| const float vf = ((2.f * j + 1.f) / height - 1.f); |
| const float rh = hypotf(uf, vf); |
| const float sinzz = 1.f - rh * rh; |
| const float h = 1.f + s->v_fov; |
| const float sinz = (h - sqrtf(sinzz)) / (h / rh + rh / h); |
| const float sinz2 = sinz * sinz; |
| |
| if (sinz2 <= 1.f) { |
| const float cosz = sqrtf(1.f - sinz2); |
| |
| const float theta = asinf(cosz); |
| const float phi = atan2f(uf, vf); |
| |
| const float sin_phi = sinf(phi); |
| const float cos_phi = cosf(phi); |
| const float sin_theta = sinf(theta); |
| const float cos_theta = cosf(theta); |
| |
| vec[0] = cos_theta * sin_phi; |
| vec[1] = sin_theta; |
| vec[2] = cos_theta * cos_phi; |
| } else { |
| vec[0] = 0.f; |
| vec[1] = 1.f; |
| vec[2] = 0.f; |
| return 0; |
| } |
| |
| normalize_vector(vec); |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in tetrahedron format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int tetrahedron_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float uf = (float)i / width; |
| const float vf = (float)j / height; |
| |
| vec[0] = uf < 0.5f ? uf * 4.f - 1.f : 3.f - uf * 4.f; |
| vec[1] = 1.f - vf * 2.f; |
| vec[2] = 2.f * fabsf(1.f - fabsf(1.f - uf * 2.f + vf)) - 1.f; |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in tetrahedron format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float d0 = vec[0] * 1.f + vec[1] * 1.f + vec[2] *-1.f; |
| const float d1 = vec[0] *-1.f + vec[1] *-1.f + vec[2] *-1.f; |
| const float d2 = vec[0] * 1.f + vec[1] *-1.f + vec[2] * 1.f; |
| const float d3 = vec[0] *-1.f + vec[1] * 1.f + vec[2] * 1.f; |
| const float d = FFMAX(d0, FFMAX3(d1, d2, d3)); |
| |
| float uf, vf, x, y, z; |
| int ui, vi; |
| |
| x = vec[0] / d; |
| y = vec[1] / d; |
| z = -vec[2] / d; |
| |
| vf = 0.5f - y * 0.5f * s->input_mirror_modifier[1]; |
| |
| if ((x + y >= 0.f && y + z >= 0.f && -z - x <= 0.f) || |
| (x + y <= 0.f && -y + z >= 0.f && z - x >= 0.f)) { |
| uf = 0.25f * x * s->input_mirror_modifier[0] + 0.25f; |
| } else { |
| uf = 0.75f - 0.25f * x * s->input_mirror_modifier[0]; |
| } |
| |
| uf *= width; |
| vf *= height; |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = reflectx(ui + j - 1, vi + i - 1, width, height); |
| vs[i][j] = reflecty(vi + i - 1, height); |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in dual fisheye format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int dfisheye_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float scale = 1.f + s->out_pad; |
| |
| const float ew = width / 2.f; |
| const float eh = height; |
| |
| const int ei = i >= ew ? i - ew : i; |
| const float m = i >= ew ? 1.f : -1.f; |
| |
| const float uf = ((2.f * ei) / ew - 1.f) * scale; |
| const float vf = ((2.f * j + 1.f) / eh - 1.f) * scale; |
| |
| const float h = hypotf(uf, vf); |
| const float lh = h > 0.f ? h : 1.f; |
| const float theta = m * M_PI_2 * (1.f - h); |
| |
| const float sin_theta = sinf(theta); |
| const float cos_theta = cosf(theta); |
| |
| vec[0] = cos_theta * m * uf / lh; |
| vec[1] = cos_theta * vf / lh; |
| vec[2] = sin_theta; |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in dual fisheye format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| static int xyz_to_dfisheye(const V360Context *s, |
| const float *vec, int width, int height, |
| int16_t us[4][4], int16_t vs[4][4], float *du, float *dv) |
| { |
| const float scale = 1.f - s->in_pad; |
| |
| const float ew = width / 2.f; |
| const float eh = height; |
| |
| const float h = hypotf(vec[0], vec[1]); |
| const float lh = h > 0.f ? h : 1.f; |
| const float theta = acosf(fabsf(vec[2])) / M_PI; |
| |
| float uf = (theta * (vec[0] / lh) * s->input_mirror_modifier[0] * scale + 0.5f) * ew; |
| float vf = (theta * (vec[1] / lh) * s->input_mirror_modifier[1] * scale + 0.5f) * eh; |
| |
| int ui, vi; |
| int u_shift; |
| |
| if (vec[2] >= 0.f) { |
| u_shift = ceilf(ew); |
| } else { |
| u_shift = 0; |
| uf = ew - uf; |
| } |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = av_clip(u_shift + ui + j - 1, 0, width - 1); |
| vs[i][j] = av_clip( vi + i - 1, 0, height - 1); |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in barrel facebook's format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int barrel_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float scale = 0.99f; |
| float l_x, l_y, l_z; |
| |
| if (i < 4 * width / 5) { |
| const float theta_range = M_PI_4; |
| |
| const int ew = 4 * width / 5; |
| const int eh = height; |
| |
| const float phi = ((2.f * i) / ew - 1.f) * M_PI / scale; |
| const float theta = ((2.f * j) / eh - 1.f) * theta_range / scale; |
| |
| const float sin_phi = sinf(phi); |
| const float cos_phi = cosf(phi); |
| const float sin_theta = sinf(theta); |
| const float cos_theta = cosf(theta); |
| |
| l_x = cos_theta * sin_phi; |
| l_y = sin_theta; |
| l_z = cos_theta * cos_phi; |
| } else { |
| const int ew = width / 5; |
| const int eh = height / 2; |
| |
| float uf, vf; |
| |
| if (j < eh) { // UP |
| uf = 2.f * (i - 4 * ew) / ew - 1.f; |
| vf = 2.f * (j ) / eh - 1.f; |
| |
| uf /= scale; |
| vf /= scale; |
| |
| l_x = uf; |
| l_y = -1.f; |
| l_z = vf; |
| } else { // DOWN |
| uf = 2.f * (i - 4 * ew) / ew - 1.f; |
| vf = 2.f * (j - eh) / eh - 1.f; |
| |
| uf /= scale; |
| vf /= scale; |
| |
| l_x = uf; |
| l_y = 1.f; |
| l_z = -vf; |
| } |
| } |
| |
| vec[0] = l_x; |
| vec[1] = l_y; |
| vec[2] = l_z; |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in barrel facebook's format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float scale = 0.99f; |
| |
| const float phi = atan2f(vec[0], vec[2]) * s->input_mirror_modifier[0]; |
| const float theta = asinf(vec[1]) * s->input_mirror_modifier[1]; |
| const float theta_range = M_PI_4; |
| |
| int ew, eh; |
| int u_shift, v_shift; |
| float uf, vf; |
| int ui, vi; |
| |
| if (theta > -theta_range && theta < theta_range) { |
| ew = 4 * width / 5; |
| eh = height; |
| |
| u_shift = s->ih_flip ? width / 5 : 0; |
| v_shift = 0; |
| |
| uf = (phi / M_PI * scale + 1.f) * ew / 2.f; |
| vf = (theta / theta_range * scale + 1.f) * eh / 2.f; |
| } else { |
| ew = width / 5; |
| eh = height / 2; |
| |
| u_shift = s->ih_flip ? 0 : 4 * ew; |
| |
| if (theta < 0.f) { // UP |
| uf = -vec[0] / vec[1]; |
| vf = -vec[2] / vec[1]; |
| v_shift = 0; |
| } else { // DOWN |
| uf = vec[0] / vec[1]; |
| vf = -vec[2] / vec[1]; |
| v_shift = eh; |
| } |
| |
| uf *= s->input_mirror_modifier[0] * s->input_mirror_modifier[1]; |
| vf *= s->input_mirror_modifier[1]; |
| |
| uf = 0.5f * ew * (uf * scale + 1.f); |
| vf = 0.5f * eh * (vf * scale + 1.f); |
| } |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = u_shift + av_clip(ui + j - 1, 0, ew - 1); |
| vs[i][j] = v_shift + av_clip(vi + i - 1, 0, eh - 1); |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in barrel split facebook's format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| const float phi = atan2f(vec[0], vec[2]) * s->input_mirror_modifier[0]; |
| const float theta = asinf(vec[1]) * s->input_mirror_modifier[1]; |
| |
| const float theta_range = M_PI_4; |
| |
| int ew, eh; |
| int u_shift, v_shift; |
| float uf, vf; |
| int ui, vi; |
| |
| if (theta >= -theta_range && theta <= theta_range) { |
| const float scalew = s->fin_pad > 0 ? 1.f - s->fin_pad / (width * 2.f / 3.f) : 1.f - s->in_pad; |
| const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (height / 2.f) : 1.f - s->in_pad; |
| |
| ew = width / 3 * 2; |
| eh = height / 2; |
| |
| u_shift = s->ih_flip ? width / 3 : 0; |
| v_shift = phi >= M_PI_2 || phi < -M_PI_2 ? eh : 0; |
| |
| uf = fmodf(phi, M_PI_2) / M_PI_2; |
| vf = theta / M_PI_4; |
| |
| if (v_shift) |
| uf = uf >= 0.f ? fmodf(uf - 1.f, 1.f) : fmodf(uf + 1.f, 1.f); |
| |
| uf = (uf * scalew + 1.f) * width / 3.f; |
| vf = (vf * scaleh + 1.f) * height / 4.f; |
| } else { |
| const float scalew = s->fin_pad > 0 ? 1.f - s->fin_pad / (width / 3.f) : 1.f - s->in_pad; |
| const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (height / 4.f) : 1.f - s->in_pad; |
| int v_offset = 0; |
| |
| ew = width / 3; |
| eh = height / 4; |
| |
| u_shift = s->ih_flip ? 0 : 2 * ew; |
| |
| if (theta <= 0.f && theta >= -M_PI_2 && |
| phi <= M_PI_2 && phi >= -M_PI_2) { |
| uf = -vec[0] / vec[1]; |
| vf = -vec[2] / vec[1]; |
| v_shift = 0; |
| v_offset = -eh; |
| } else if (theta >= 0.f && theta <= M_PI_2 && |
| phi <= M_PI_2 && phi >= -M_PI_2) { |
| uf = vec[0] / vec[1]; |
| vf = -vec[2] / vec[1]; |
| v_shift = height * 0.25f; |
| } else if (theta <= 0.f && theta >= -M_PI_2) { |
| uf = vec[0] / vec[1]; |
| vf = vec[2] / vec[1]; |
| v_shift = height * 0.5f; |
| v_offset = -eh; |
| } else { |
| uf = -vec[0] / vec[1]; |
| vf = vec[2] / vec[1]; |
| v_shift = height * 0.75f; |
| } |
| |
| uf *= s->input_mirror_modifier[0] * s->input_mirror_modifier[1]; |
| vf *= s->input_mirror_modifier[1]; |
| |
| uf = 0.5f * width / 3.f * (uf * scalew + 1.f); |
| vf = height * 0.25f * (vf * scaleh + 1.f) + v_offset; |
| } |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = u_shift + av_clip(ui + j - 1, 0, ew - 1); |
| vs[i][j] = v_shift + av_clip(vi + i - 1, 0, eh - 1); |
| } |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in barrel split facebook's format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int barrelsplit_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float x = (i + 0.5f) / width; |
| const float y = (j + 0.5f) / height; |
| float l_x, l_y, l_z; |
| |
| if (x < 2.f / 3.f) { |
| const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (width * 2.f / 3.f) : 1.f - s->out_pad; |
| const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 2.f) : 1.f - s->out_pad; |
| |
| const float back = floorf(y * 2.f); |
| |
| const float phi = ((3.f / 2.f * x - 0.5f) / scalew - back) * M_PI; |
| const float theta = (y - 0.25f - 0.5f * back) / scaleh * M_PI; |
| |
| const float sin_phi = sinf(phi); |
| const float cos_phi = cosf(phi); |
| const float sin_theta = sinf(theta); |
| const float cos_theta = cosf(theta); |
| |
| l_x = cos_theta * sin_phi; |
| l_y = sin_theta; |
| l_z = cos_theta * cos_phi; |
| } else { |
| const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (width / 3.f) : 1.f - s->out_pad; |
| const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (height / 4.f) : 1.f - s->out_pad; |
| |
| const int face = floorf(y * 4.f); |
| float uf, vf; |
| |
| uf = x * 3.f - 2.f; |
| |
| switch (face) { |
| case 0: |
| vf = y * 2.f; |
| uf = 1.f - uf; |
| vf = 0.5f - vf; |
| |
| l_x = (0.5f - uf) / scalew; |
| l_y = -0.5f; |
| l_z = (0.5f - vf) / scaleh; |
| break; |
| case 1: |
| vf = y * 2.f; |
| uf = 1.f - uf; |
| vf = 1.f - (vf - 0.5f); |
| |
| l_x = (0.5f - uf) / scalew; |
| l_y = 0.5f; |
| l_z = (-0.5f + vf) / scaleh; |
| break; |
| case 2: |
| vf = y * 2.f - 0.5f; |
| vf = 1.f - (1.f - vf); |
| |
| l_x = (0.5f - uf) / scalew; |
| l_y = -0.5f; |
| l_z = (0.5f - vf) / scaleh; |
| break; |
| case 3: |
| vf = y * 2.f - 1.5f; |
| |
| l_x = (0.5f - uf) / scalew; |
| l_y = 0.5f; |
| l_z = (-0.5f + vf) / scaleh; |
| break; |
| } |
| } |
| |
| vec[0] = l_x; |
| vec[1] = l_y; |
| vec[2] = l_z; |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate 3D coordinates on sphere for corresponding frame position in tspyramid format. |
| * |
| * @param s filter private context |
| * @param i horizontal position on frame [0, width) |
| * @param j vertical position on frame [0, height) |
| * @param width frame width |
| * @param height frame height |
| * @param vec coordinates on sphere |
| */ |
| static int tspyramid_to_xyz(const V360Context *s, |
| int i, int j, int width, int height, |
| float *vec) |
| { |
| const float x = (i + 0.5f) / width; |
| const float y = (j + 0.5f) / height; |
| |
| if (x < 0.5f) { |
| vec[0] = x * 4.f - 1.f; |
| vec[1] = (y * 2.f - 1.f); |
| vec[2] = 1.f; |
| } else if (x >= 0.6875f && x < 0.8125f && |
| y >= 0.375f && y < 0.625f) { |
| vec[0] = -(x - 0.6875f) * 16.f + 1.f; |
| vec[1] = (y - 0.375f) * 8.f - 1.f; |
| vec[2] = -1.f; |
| } else if (0.5f <= x && x < 0.6875f && |
| ((0.f <= y && y < 0.375f && y >= 2.f * (x - 0.5f)) || |
| (0.375f <= y && y < 0.625f) || |
| (0.625f <= y && y < 1.f && y <= 2.f * (1.f - x)))) { |
| vec[0] = 1.f; |
| vec[1] = 2.f * (y - 2.f * x + 1.f) / (3.f - 4.f * x) - 1.f; |
| vec[2] = -2.f * (x - 0.5f) / 0.1875f + 1.f; |
| } else if (0.8125f <= x && x < 1.f && |
| ((0.f <= y && y < 0.375f && x >= (1.f - y / 2.f)) || |
| (0.375f <= y && y < 0.625f) || |
| (0.625f <= y && y < 1.f && y <= (2.f * x - 1.f)))) { |
| vec[0] = -1.f; |
| vec[1] = 2.f * (y + 2.f * x - 2.f) / (4.f * x - 3.f) - 1.f; |
| vec[2] = 2.f * (x - 0.8125f) / 0.1875f - 1.f; |
| } else if (0.f <= y && y < 0.375f && |
| ((0.5f <= x && x < 0.8125f && y < 2.f * (x - 0.5f)) || |
| (0.6875f <= x && x < 0.8125f) || |
| (0.8125f <= x && x < 1.f && x < (1.f - y / 2.f)))) { |
| vec[0] = 2.f * (1.f - x - 0.5f * y) / (0.5f - y) - 1.f; |
| vec[1] = -1.f; |
| vec[2] = 2.f * (0.375f - y) / 0.375f - 1.f; |
| } else { |
| vec[0] = 2.f * (0.5f - x + 0.5f * y) / (y - 0.5f) - 1.f; |
| vec[1] = 1.f; |
| vec[2] = -2.f * (1.f - y) / 0.375f + 1.f; |
| } |
| |
| normalize_vector(vec); |
| |
| return 1; |
| } |
| |
| /** |
| * Calculate frame position in tspyramid format for corresponding 3D coordinates on sphere. |
| * |
| * @param s filter private context |
| * @param vec coordinates on sphere |
| * @param width frame width |
| * @param height frame height |
| * @param us horizontal coordinates for interpolation window |
| * @param vs vertical coordinates for interpolation window |
| * @param du horizontal relative coordinate |
| * @param dv vertical relative coordinate |
| */ |
| 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) |
| { |
| float uf, vf; |
| int ui, vi; |
| int face; |
| |
| xyz_to_cube(s, vec, &uf, &vf, &face); |
| |
| uf = (uf + 1.f) * 0.5f; |
| vf = (vf + 1.f) * 0.5f; |
| |
| switch (face) { |
| case UP: |
| uf = 0.1875f * vf - 0.375f * uf * vf - 0.125f * uf + 0.8125f; |
| vf = 0.375f - 0.375f * vf; |
| break; |
| case FRONT: |
| uf = 0.5f * uf; |
| break; |
| case DOWN: |
| uf = 1.f - 0.1875f * vf - 0.5f * uf + 0.375f * uf * vf; |
| vf = 1.f - 0.375f * vf; |
| break; |
| case LEFT: |
| vf = 0.25f * vf + 0.75f * uf * vf - 0.375f * uf + 0.375f; |
| uf = 0.1875f * uf + 0.8125f; |
| break; |
| case RIGHT: |
| vf = 0.375f * uf - 0.75f * uf * vf + vf; |
| uf = 0.1875f * uf + 0.5f; |
| break; |
| case BACK: |
| uf = 0.125f * uf + 0.6875f; |
| vf = 0.25f * vf + 0.375f; |
| break; |
| } |
| |
| uf *= width; |
| vf *= height; |
| |
| ui = floorf(uf); |
| vi = floorf(vf); |
| |
| *du = uf - ui; |
| *dv = vf - vi; |
| |
| for (int i = 0; i < 4; i++) { |
| for (int j = 0; j < 4; j++) { |
| us[i][j] = reflectx(ui + j - 1, vi + i - 1, width, height); |
| vs[i][j] = reflecty(vi + i - 1, height); |
| } |
| } |
| |
| return 1; |
| } |
| |
| static void multiply_matrix(float c[3][3], const float a[3][3], const float b[3][3]) |
| { |
| for (int i = 0; i < 3; i++) { |
| for (int j = 0; j < 3; j++) { |
| float sum = 0.f; |
| |
| for (int k = 0; k < 3; k++) |
| sum += a[i][k] * b[k][j]; |
| |
| c[i][j] = sum; |
| } |
| } |
| } |
| |
| /** |
| * Calculate rotation matrix for yaw/pitch/roll angles. |
| */ |
| static inline void calculate_rotation_matrix(float yaw, float pitch, float roll, |
| float rot_mat[3][3], |
| const int rotation_order[3]) |
| { |
| const float yaw_rad = yaw * M_PI / 180.f; |
| const float pitch_rad = pitch * M_PI / 180.f; |
| const float roll_rad = roll * M_PI / 180.f; |
| |
| const float sin_yaw = sinf(yaw_rad); |
| const float cos_yaw = cosf(yaw_rad); |
| const float sin_pitch = sinf(pitch_rad); |
| const float cos_pitch = cosf(pitch_rad); |
| const float sin_roll = sinf(roll_rad); |
| const float cos_roll = cosf(roll_rad); |
| |
| float m[3][3][3]; |
| float temp[3][3]; |
| |
| m[0][0][0] = cos_yaw; m[0][0][1] = 0; m[0][0][2] = sin_yaw; |
| m[0][1][0] = 0; m[0][1][1] = 1; m[0][1][2] = 0; |
| m[0][2][0] = -sin_yaw; m[0][2][1] = 0; m[0][2][2] = cos_yaw; |
| |
| m[1][0][0] = 1; m[1][0][1] = 0; m[1][0][2] = 0; |
| m[1][1][0] = 0; m[1][1][1] = cos_pitch; m[1][1][2] = -sin_pitch; |
| m[1][2][0] = 0; m[1][2][1] = sin_pitch; m[1][2][2] = cos_pitch; |
| |
| m[2][0][0] = cos_roll; m[2][0][1] = -sin_roll; m[2][0][2] = 0; |
| m[2][1][0] = sin_roll; m[2][1][1] = cos_roll; m[2][1][2] = 0; |
| m[2][2][0] = 0; m[2][2][1] = 0; m[2][2][2] = 1; |
| |
| multiply_matrix(temp, m[rotation_order[0]], m[rotation_order[1]]); |
| multiply_matrix(rot_mat, temp, m[rotation_order[2]]); |
| } |
| |
| /** |
| * Rotate vector with given rotation matrix. |
| * |
| * @param rot_mat rotation matrix |
| * @param vec vector |
| */ |
| static inline void rotate(const float rot_mat[3][3], |
| float *vec) |
| { |
| const float x_tmp = vec[0] * rot_mat[0][0] + vec[1] * rot_mat[0][1] + vec[2] * rot_mat[0][2]; |
| const float y_tmp = vec[0] * rot_mat[1][0] + vec[1] * rot_mat[1][1] + vec[2] * rot_mat[1][2]; |
| const float z_tmp = vec[0] * rot_mat[2][0] + vec[1] * rot_mat[2][1] + vec[2] * rot_mat[2][2]; |
| |
| vec[0] = x_tmp; |
| vec[1] = y_tmp; |
| vec[2] = z_tmp; |
| } |
| |
| static inline void set_mirror_modifier(int h_flip, int v_flip, int d_flip, |
| float *modifier) |
| { |
| modifier[0] = h_flip ? -1.f : 1.f; |
| modifier[1] = v_flip ? -1.f : 1.f; |
| modifier[2] = d_flip ? -1.f : 1.f; |
| } |
| |
| static inline void mirror(const float *modifier, float *vec) |
| { |
| vec[0] *= modifier[0]; |
| vec[1] *= modifier[1]; |
| vec[2] *= modifier[2]; |
| } |
| |
| static int allocate_plane(V360Context *s, int sizeof_uv, int sizeof_ker, int sizeof_mask, int p) |
| { |
| if (!s->u[p]) |
| s->u[p] = av_calloc(s->uv_linesize[p] * s->pr_height[p], sizeof_uv); |
| if (!s->v[p]) |
| s->v[p] = av_calloc(s->uv_linesize[p] * s->pr_height[p], sizeof_uv); |
| if (!s->u[p] || !s->v[p]) |
| return AVERROR(ENOMEM); |
| if (sizeof_ker) { |
| if (!s->ker[p]) |
| s->ker[p] = av_calloc(s->uv_linesize[p] * s->pr_height[p], sizeof_ker); |
| if (!s->ker[p]) |
| return AVERROR(ENOMEM); |
| } |
| |
| if (sizeof_mask && !p) { |
| if (!s->mask) |
| s->mask = av_calloc(s->pr_width[p] * s->pr_height[p], sizeof_mask); |
| if (!s->mask) |
| return AVERROR(ENOMEM); |
| } |
| |
| return 0; |
| } |
| |
| static void fov_from_dfov(int format, float d_fov, float w, float h, float *h_fov, float *v_fov) |
| { |
| switch (format) { |
| case STEREOGRAPHIC: |
| { |
| const float d = 0.5f * hypotf(w, h); |
| const float l = d / (tanf(d_fov * M_PI / 720.f)); |
| |
| *h_fov = 2.f * atan2f(w * 0.5f, l) * 360.f / M_PI; |
| *v_fov = 2.f * atan2f(h * 0.5f, l) * 360.f / M_PI; |
| } |
| break; |
| case FISHEYE: |
| { |
| const float d = 0.5f * hypotf(w, h); |
| |
| *h_fov = d / w * d_fov; |
| *v_fov = d / h * d_fov; |
| } |
| break; |
| case FLAT: |
| default: |
| { |
| const float da = tanf(0.5f * FFMIN(d_fov, 359.f) * M_PI / 180.f); |
| const float d = hypotf(w, h); |
| |
| *h_fov = atan2f(da * w, d) * 360.f / M_PI; |
| *v_fov = atan2f(da * h, d) * 360.f / M_PI; |
| |
| if (*h_fov < 0.f) |
| *h_fov += 360.f; |
| if (*v_fov < 0.f) |
| *v_fov += 360.f; |
| } |
| break; |
| } |
| } |
| |
| static void set_dimensions(int *outw, int *outh, int w, int h, const AVPixFmtDescriptor *desc) |
| { |
| outw[1] = outw[2] = FF_CEIL_RSHIFT(w, desc->log2_chroma_w); |
| outw[0] = outw[3] = w; |
| outh[1] = outh[2] = FF_CEIL_RSHIFT(h, desc->log2_chroma_h); |
| outh[0] = outh[3] = h; |
| } |
| |
| // Calculate remap data |
| static av_always_inline int v360_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| V360Context *s = ctx->priv; |
| |
| for (int p = 0; p < s->nb_allocated; p++) { |
| const int max_value = s->max_value; |
| const int width = s->pr_width[p]; |
| const int uv_linesize = s->uv_linesize[p]; |
| const int height = s->pr_height[p]; |
| const int in_width = s->inplanewidth[p]; |
| const int in_height = s->inplaneheight[p]; |
| const int slice_start = (height * jobnr ) / nb_jobs; |
| const int slice_end = (height * (jobnr + 1)) / nb_jobs; |
| float du, dv; |
| float vec[3]; |
| XYRemap rmap; |
| |
| for (int j = slice_start; j < slice_end; j++) { |
| for (int i = 0; i < width; i++) { |
| int16_t *u = s->u[p] + (j * uv_linesize + i) * s->elements; |
| int16_t *v = s->v[p] + (j * uv_linesize + i) * s->elements; |
| int16_t *ker = s->ker[p] + (j * uv_linesize + i) * s->elements; |
| uint8_t *mask8 = p ? NULL : s->mask + (j * s->pr_width[0] + i); |
| uint16_t *mask16 = p ? NULL : (uint16_t *)s->mask + (j * s->pr_width[0] + i); |
| int in_mask, out_mask; |
| |
| if (s->out_transpose) |
| out_mask = s->out_transform(s, j, i, height, width, vec); |
| else |
| out_mask = s->out_transform(s, i, j, width, height, vec); |
| av_assert1(!isnan(vec[0]) && !isnan(vec[1]) && !isnan(vec[2])); |
| rotate(s->rot_mat, vec); |
| av_assert1(!isnan(vec[0]) && !isnan(vec[1]) && !isnan(vec[2])); |
| normalize_vector(vec); |
| mirror(s->output_mirror_modifier, vec); |
| if (s->in_transpose) |
| in_mask = s->in_transform(s, vec, in_height, in_width, rmap.v, rmap.u, &du, &dv); |
| else |
| in_mask = s->in_transform(s, vec, in_width, in_height, rmap.u, rmap.v, &du, &dv); |
| av_assert1(!isnan(du) && !isnan(dv)); |
| s->calculate_kernel(du, dv, &rmap, u, v, ker); |
| |
| if (!p && s->mask) { |
| if (s->mask_size == 1) { |
| mask8[0] = 255 * (out_mask & in_mask); |
| } else { |
| mask16[0] = max_value * (out_mask & in_mask); |
| } |
| } |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int config_output(AVFilterLink *outlink) |
| { |
| AVFilterContext *ctx = outlink->src; |
| AVFilterLink *inlink = ctx->inputs[0]; |
| V360Context *s = ctx->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| const int depth = desc->comp[0].depth; |
| const int sizeof_mask = s->mask_size = (depth + 7) >> 3; |
| int sizeof_uv; |
| int sizeof_ker; |
| int err; |
| int h, w; |
| int in_offset_h, in_offset_w; |
| int out_offset_h, out_offset_w; |
| float hf, wf; |
| int (*prepare_out)(AVFilterContext *ctx); |
| int have_alpha; |
| |
| s->max_value = (1 << depth) - 1; |
| s->input_mirror_modifier[0] = s->ih_flip ? -1.f : 1.f; |
| s->input_mirror_modifier[1] = s->iv_flip ? -1.f : 1.f; |
| |
| switch (s->interp) { |
| case NEAREST: |
| s->calculate_kernel = nearest_kernel; |
| s->remap_slice = depth <= 8 ? remap1_8bit_slice : remap1_16bit_slice; |
| s->elements = 1; |
| sizeof_uv = sizeof(int16_t) * s->elements; |
| sizeof_ker = 0; |
| break; |
| case BILINEAR: |
| s->calculate_kernel = bilinear_kernel; |
| s->remap_slice = depth <= 8 ? remap2_8bit_slice : remap2_16bit_slice; |
| s->elements = 2 * 2; |
| sizeof_uv = sizeof(int16_t) * s->elements; |
| sizeof_ker = sizeof(int16_t) * s->elements; |
| break; |
| case LAGRANGE9: |
| s->calculate_kernel = lagrange_kernel; |
| s->remap_slice = depth <= 8 ? remap3_8bit_slice : remap3_16bit_slice; |
| s->elements = 3 * 3; |
| sizeof_uv = sizeof(int16_t) * s->elements; |
| sizeof_ker = sizeof(int16_t) * s->elements; |
| break; |
| case BICUBIC: |
| s->calculate_kernel = bicubic_kernel; |
| s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice; |
| s->elements = 4 * 4; |
| sizeof_uv = sizeof(int16_t) * s->elements; |
| sizeof_ker = sizeof(int16_t) * s->elements; |
| break; |
| case LANCZOS: |
| s->calculate_kernel = lanczos_kernel; |
| s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice; |
| s->elements = 4 * 4; |
| sizeof_uv = sizeof(int16_t) * s->elements; |
| sizeof_ker = sizeof(int16_t) * s->elements; |
| break; |
| case SPLINE16: |
| s->calculate_kernel = spline16_kernel; |
| s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice; |
| s->elements = 4 * 4; |
| sizeof_uv = sizeof(int16_t) * s->elements; |
| sizeof_ker = sizeof(int16_t) * s->elements; |
| break; |
| case GAUSSIAN: |
| s->calculate_kernel = gaussian_kernel; |
| s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice; |
| s->elements = 4 * 4; |
| sizeof_uv = sizeof(int16_t) * s->elements; |
| sizeof_ker = sizeof(int16_t) * s->elements; |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| ff_v360_init(s, depth); |
| |
| for (int order = 0; order < NB_RORDERS; order++) { |
| const char c = s->rorder[order]; |
| int rorder; |
| |
| if (c == '\0') { |
| av_log(ctx, AV_LOG_WARNING, |
| "Incomplete rorder option. Direction for all 3 rotation orders should be specified. Switching to default rorder.\n"); |
| s->rotation_order[0] = YAW; |
| s->rotation_order[1] = PITCH; |
| s->rotation_order[2] = ROLL; |
| break; |
| } |
| |
| rorder = get_rorder(c); |
| if (rorder == -1) { |
| av_log(ctx, AV_LOG_WARNING, |
| "Incorrect rotation order symbol '%c' in rorder option. Switching to default rorder.\n", c); |
| s->rotation_order[0] = YAW; |
| s->rotation_order[1] = PITCH; |
| s->rotation_order[2] = ROLL; |
| break; |
| } |
| |
| s->rotation_order[order] = rorder; |
| } |
| |
| switch (s->in_stereo) { |
| case STEREO_2D: |
| w = inlink->w; |
| h = inlink->h; |
| in_offset_w = in_offset_h = 0; |
| break; |
| case STEREO_SBS: |
| w = inlink->w / 2; |
| h = inlink->h; |
| in_offset_w = w; |
| in_offset_h = 0; |
| break; |
| case STEREO_TB: |
| w = inlink->w; |
| h = inlink->h / 2; |
| in_offset_w = 0; |
| in_offset_h = h; |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| set_dimensions(s->inplanewidth, s->inplaneheight, w, h, desc); |
| set_dimensions(s->in_offset_w, s->in_offset_h, in_offset_w, in_offset_h, desc); |
| |
| s->in_width = s->inplanewidth[0]; |
| s->in_height = s->inplaneheight[0]; |
| |
| if (s->id_fov > 0.f) |
| fov_from_dfov(s->in, s->id_fov, w, h, &s->ih_fov, &s->iv_fov); |
| |
| if (s->in_transpose) |
| FFSWAP(int, s->in_width, s->in_height); |
| |
| switch (s->in) { |
| case EQUIRECTANGULAR: |
| s->in_transform = xyz_to_equirect; |
| err = 0; |
| wf = w; |
| hf = h; |
| break; |
| case CUBEMAP_3_2: |
| s->in_transform = xyz_to_cube3x2; |
| err = prepare_cube_in(ctx); |
| wf = w / 3.f * 4.f; |
| hf = h; |
| break; |
| case CUBEMAP_1_6: |
| s->in_transform = xyz_to_cube1x6; |
| err = prepare_cube_in(ctx); |
| wf = w * 4.f; |
| hf = h / 3.f; |
| break; |
| case CUBEMAP_6_1: |
| s->in_transform = xyz_to_cube6x1; |
| err = prepare_cube_in(ctx); |
| wf = w / 3.f * 2.f; |
| hf = h * 2.f; |
| break; |
| case EQUIANGULAR: |
| s->in_transform = xyz_to_eac; |
| err = prepare_eac_in(ctx); |
| wf = w; |
| hf = h / 9.f * 8.f; |
| break; |
| case FLAT: |
| s->in_transform = xyz_to_flat; |
| err = prepare_flat_in(ctx); |
| wf = w; |
| hf = h; |
| break; |
| case PERSPECTIVE: |
| av_log(ctx, AV_LOG_ERROR, "Supplied format is not accepted as input.\n"); |
| return AVERROR(EINVAL); |
| case DUAL_FISHEYE: |
| s->in_transform = xyz_to_dfisheye; |
| err = 0; |
| wf = w; |
| hf = h; |
| break; |
| case BARREL: |
| s->in_transform = xyz_to_barrel; |
| err = 0; |
| wf = w / 5.f * 4.f; |
| hf = h; |
| break; |
| case STEREOGRAPHIC: |
| s->in_transform = xyz_to_stereographic; |
| err = prepare_stereographic_in(ctx); |
| wf = w; |
| hf = h / 2.f; |
| break; |
| case MERCATOR: |
| s->in_transform = xyz_to_mercator; |
| err = 0; |
| wf = w; |
| hf = h / 2.f; |
| break; |
| case BALL: |
| s->in_transform = xyz_to_ball; |
| err = 0; |
| wf = w; |
| hf = h / 2.f; |
| break; |
| case HAMMER: |
| s->in_transform = xyz_to_hammer; |
| err = 0; |
| wf = w; |
| hf = h; |
| break; |
| case SINUSOIDAL: |
| s->in_transform = xyz_to_sinusoidal; |
| err = 0; |
| wf = w; |
| hf = h; |
| break; |
| case FISHEYE: |
| s->in_transform = xyz_to_fisheye; |
| err = prepare_fisheye_in(ctx); |
| wf = w * 2; |
| hf = h; |
| break; |
| case PANNINI: |
| s->in_transform = xyz_to_pannini; |
| err = 0; |
| wf = w; |
| hf = h; |
| break; |
| case CYLINDRICAL: |
| s->in_transform = xyz_to_cylindrical; |
| err = prepare_cylindrical_in(ctx); |
| wf = w; |
| hf = h * 2.f; |
| break; |
| case TETRAHEDRON: |
| s->in_transform = xyz_to_tetrahedron; |
| err = 0; |
| wf = w; |
| hf = h; |
| break; |
| case BARREL_SPLIT: |
| s->in_transform = xyz_to_barrelsplit; |
| err = 0; |
| wf = w * 4.f / 3.f; |
| hf = h; |
| break; |
| case TSPYRAMID: |
| s->in_transform = xyz_to_tspyramid; |
| err = 0; |
| wf = w; |
| hf = h; |
| break; |
| case HEQUIRECTANGULAR: |
| s->in_transform = xyz_to_hequirect; |
| err = 0; |
| wf = w * 2.f; |
| hf = h; |
| break; |
| default: |
| av_log(ctx, AV_LOG_ERROR, "Specified input format is not handled.\n"); |
| return AVERROR_BUG; |
| } |
| |
| if (err != 0) { |
| return err; |
| } |
| |
| switch (s->out) { |
| case EQUIRECTANGULAR: |
| s->out_transform = equirect_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf); |
| h = lrintf(hf); |
| break; |
| case CUBEMAP_3_2: |
| s->out_transform = cube3x2_to_xyz; |
| prepare_out = prepare_cube_out; |
| w = lrintf(wf / 4.f * 3.f); |
| h = lrintf(hf); |
| break; |
| case CUBEMAP_1_6: |
| s->out_transform = cube1x6_to_xyz; |
| prepare_out = prepare_cube_out; |
| w = lrintf(wf / 4.f); |
| h = lrintf(hf * 3.f); |
| break; |
| case CUBEMAP_6_1: |
| s->out_transform = cube6x1_to_xyz; |
| prepare_out = prepare_cube_out; |
| w = lrintf(wf / 2.f * 3.f); |
| h = lrintf(hf / 2.f); |
| break; |
| case EQUIANGULAR: |
| s->out_transform = eac_to_xyz; |
| prepare_out = prepare_eac_out; |
| w = lrintf(wf); |
| h = lrintf(hf / 8.f * 9.f); |
| break; |
| case FLAT: |
| s->out_transform = flat_to_xyz; |
| prepare_out = prepare_flat_out; |
| w = lrintf(wf); |
| h = lrintf(hf); |
| break; |
| case DUAL_FISHEYE: |
| s->out_transform = dfisheye_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf); |
| h = lrintf(hf); |
| break; |
| case BARREL: |
| s->out_transform = barrel_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf / 4.f * 5.f); |
| h = lrintf(hf); |
| break; |
| case STEREOGRAPHIC: |
| s->out_transform = stereographic_to_xyz; |
| prepare_out = prepare_stereographic_out; |
| w = lrintf(wf); |
| h = lrintf(hf * 2.f); |
| break; |
| case MERCATOR: |
| s->out_transform = mercator_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf); |
| h = lrintf(hf * 2.f); |
| break; |
| case BALL: |
| s->out_transform = ball_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf); |
| h = lrintf(hf * 2.f); |
| break; |
| case HAMMER: |
| s->out_transform = hammer_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf); |
| h = lrintf(hf); |
| break; |
| case SINUSOIDAL: |
| s->out_transform = sinusoidal_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf); |
| h = lrintf(hf); |
| break; |
| case FISHEYE: |
| s->out_transform = fisheye_to_xyz; |
| prepare_out = prepare_fisheye_out; |
| w = lrintf(wf * 0.5f); |
| h = lrintf(hf); |
| break; |
| case PANNINI: |
| s->out_transform = pannini_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf); |
| h = lrintf(hf); |
| break; |
| case CYLINDRICAL: |
| s->out_transform = cylindrical_to_xyz; |
| prepare_out = prepare_cylindrical_out; |
| w = lrintf(wf); |
| h = lrintf(hf * 0.5f); |
| break; |
| case PERSPECTIVE: |
| s->out_transform = perspective_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf / 2.f); |
| h = lrintf(hf); |
| break; |
| case TETRAHEDRON: |
| s->out_transform = tetrahedron_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf); |
| h = lrintf(hf); |
| break; |
| case BARREL_SPLIT: |
| s->out_transform = barrelsplit_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf / 4.f * 3.f); |
| h = lrintf(hf); |
| break; |
| case TSPYRAMID: |
| s->out_transform = tspyramid_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf); |
| h = lrintf(hf); |
| break; |
| case HEQUIRECTANGULAR: |
| s->out_transform = hequirect_to_xyz; |
| prepare_out = NULL; |
| w = lrintf(wf / 2.f); |
| h = lrintf(hf); |
| break; |
| default: |
| av_log(ctx, AV_LOG_ERROR, "Specified output format is not handled.\n"); |
| return AVERROR_BUG; |
| } |
| |
| // Override resolution with user values if specified |
| if (s->width > 0 && s->height <= 0 && s->h_fov > 0.f && s->v_fov > 0.f && |
| s->out == FLAT && s->d_fov == 0.f) { |
| w = s->width; |
| h = w / tanf(s->h_fov * M_PI / 360.f) * tanf(s->v_fov * M_PI / 360.f); |
| } else if (s->width <= 0 && s->height > 0 && s->h_fov > 0.f && s->v_fov > 0.f && |
| s->out == FLAT && s->d_fov == 0.f) { |
| h = s->height; |
| w = h / tanf(s->v_fov * M_PI / 360.f) * tanf(s->h_fov * M_PI / 360.f); |
| } else if (s->width > 0 && s->height > 0) { |
| w = s->width; |
| h = s->height; |
| } else if (s->width > 0 || s->height > 0) { |
| av_log(ctx, AV_LOG_ERROR, "Both width and height values should be specified.\n"); |
| return AVERROR(EINVAL); |
| } else { |
| if (s->out_transpose) |
| FFSWAP(int, w, h); |
| |
| if (s->in_transpose) |
| FFSWAP(int, w, h); |
| } |
| |
| s->width = w; |
| s->height = h; |
| |
| if (s->d_fov > 0.f) |
| fov_from_dfov(s->out, s->d_fov, w, h, &s->h_fov, &s->v_fov); |
| |
| if (prepare_out) { |
| err = prepare_out(ctx); |
| if (err != 0) |
| return err; |
| } |
| |
| set_dimensions(s->pr_width, s->pr_height, w, h, desc); |
| |
| switch (s->out_stereo) { |
| case STEREO_2D: |
| out_offset_w = out_offset_h = 0; |
| break; |
| case STEREO_SBS: |
| out_offset_w = w; |
| out_offset_h = 0; |
| w *= 2; |
| break; |
| case STEREO_TB: |
| out_offset_w = 0; |
| out_offset_h = h; |
| h *= 2; |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| set_dimensions(s->out_offset_w, s->out_offset_h, out_offset_w, out_offset_h, desc); |
| set_dimensions(s->planewidth, s->planeheight, w, h, desc); |
| |
| for (int i = 0; i < 4; i++) |
| s->uv_linesize[i] = FFALIGN(s->pr_width[i], 8); |
| |
| outlink->h = h; |
| outlink->w = w; |
| |
| s->nb_planes = av_pix_fmt_count_planes(inlink->format); |
| have_alpha = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA); |
| |
| if (desc->log2_chroma_h == desc->log2_chroma_w && desc->log2_chroma_h == 0) { |
| s->nb_allocated = 1; |
| s->map[0] = s->map[1] = s->map[2] = s->map[3] = 0; |
| } else { |
| s->nb_allocated = 2; |
| s->map[0] = s->map[3] = 0; |
| s->map[1] = s->map[2] = 1; |
| } |
| |
| for (int i = 0; i < s->nb_allocated; i++) |
| allocate_plane(s, sizeof_uv, sizeof_ker, sizeof_mask * have_alpha * s->alpha, i); |
| |
| calculate_rotation_matrix(s->yaw, s->pitch, s->roll, s->rot_mat, s->rotation_order); |
| set_mirror_modifier(s->h_flip, s->v_flip, s->d_flip, s->output_mirror_modifier); |
| |
| ctx->internal->execute(ctx, v360_slice, NULL, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx))); |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| V360Context *s = ctx->priv; |
| AVFrame *out; |
| ThreadData td; |
| |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| av_frame_copy_props(out, in); |
| |
| td.in = in; |
| td.out = out; |
| |
| ctx->internal->execute(ctx, s->remap_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx))); |
| |
| av_frame_free(&in); |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, |
| char *res, int res_len, int flags) |
| { |
| int ret; |
| |
| ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags); |
| if (ret < 0) |
| return ret; |
| |
| return config_output(ctx->outputs[0]); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| V360Context *s = ctx->priv; |
| |
| for (int p = 0; p < s->nb_allocated; p++) { |
| av_freep(&s->u[p]); |
| av_freep(&s->v[p]); |
| av_freep(&s->ker[p]); |
| } |
| av_freep(&s->mask); |
| } |
| |
| static const AVFilterPad inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_output, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_v360 = { |
| .name = "v360", |
| .description = NULL_IF_CONFIG_SMALL("Convert 360 projection of video."), |
| .priv_size = sizeof(V360Context), |
| .uninit = uninit, |
| .query_formats = query_formats, |
| .inputs = inputs, |
| .outputs = outputs, |
| .priv_class = &v360_class, |
| .flags = AVFILTER_FLAG_SLICE_THREADS, |
| .process_command = process_command, |
| }; |