* 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 "formats.h"
#include "internal.h"
#include "video.h"
-
-enum Projections {
- EQUIRECTANGULAR,
- CUBEMAP_3_2,
- CUBEMAP_6_1,
- EQUIANGULAR,
- FLAT,
- DUAL_FISHEYE,
- NB_PROJECTIONS,
-};
-
-enum InterpMethod {
- NEAREST,
- BILINEAR,
- BICUBIC,
- LANCZOS,
- NB_INTERP_METHODS,
-};
-
-enum Faces {
- TOP_LEFT,
- TOP_MIDDLE,
- TOP_RIGHT,
- BOTTOM_LEFT,
- BOTTOM_MIDDLE,
- BOTTOM_RIGHT,
- NB_FACES,
-};
-
-enum Direction {
- RIGHT, ///< Axis +X
- LEFT, ///< Axis -X
- UP, ///< Axis +Y
- DOWN, ///< Axis -Y
- FRONT, ///< Axis -Z
- BACK, ///< Axis +Z
- NB_DIRECTIONS,
-};
-
-enum Rotation {
- ROT_0,
- ROT_90,
- ROT_180,
- ROT_270,
- NB_ROTATIONS,
-};
-
-typedef struct V360Context {
- const AVClass *class;
- int in, out;
- int interp;
- int width, height;
- char* in_forder;
- char* out_forder;
- char* in_frot;
- char* out_frot;
-
- int in_cubemap_face_order[6];
- int out_cubemap_direction_order[6];
- int in_cubemap_face_rotation[6];
- int out_cubemap_face_rotation[6];
-
- float in_pad, out_pad;
-
- float yaw, pitch, roll;
-
- int h_flip, v_flip, d_flip;
-
- float h_fov, v_fov;
- float flat_range[3];
-
- int planewidth[4], planeheight[4];
- int inplanewidth[4], inplaneheight[4];
- int nb_planes;
-
- void *remap[4];
-
- int (*remap_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
-} V360Context;
+#include "v360.h"
typedef struct ThreadData {
- V360Context *s;
AVFrame *in;
AVFrame *out;
- int nb_planes;
} 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" },
- { "c3x2", "cubemap3x2", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_3_2}, 0, 0, FLAGS, "in" },
- { "c6x1", "cubemap6x1", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_6_1}, 0, 0, FLAGS, "in" },
- { "eac", "equi-angular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIANGULAR}, 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" },
+ { "equisolid", "equisolid", 0, AV_OPT_TYPE_CONST, {.i64=EQUISOLID}, 0, 0, FLAGS, "in" },
+ { "og", "orthographic", 0, AV_OPT_TYPE_CONST, {.i64=ORTHOGRAPHIC}, 0, 0, FLAGS, "in" },
+ {"octahedron", "octahedron", 0, AV_OPT_TYPE_CONST, {.i64=OCTAHEDRON}, 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" },
- { "c3x2", "cubemap3x2", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_3_2}, 0, 0, FLAGS, "out" },
- { "c6x1", "cubemap6x1", 0, AV_OPT_TYPE_CONST, {.i64=CUBEMAP_6_1}, 0, 0, FLAGS, "out" },
- { "eac", "equi-angular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIANGULAR}, 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" },
+ { "equisolid", "equisolid", 0, AV_OPT_TYPE_CONST, {.i64=EQUISOLID}, 0, 0, FLAGS, "out" },
+ { "og", "orthographic", 0, AV_OPT_TYPE_CONST, {.i64=ORTHOGRAPHIC}, 0, 0, FLAGS, "out" },
+ {"octahedron", "octahedron", 0, AV_OPT_TYPE_CONST, {.i64=OCTAHEDRON}, 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" },
- { "w", "output width", OFFSET(width), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS, "w"},
- { "h", "output height", OFFSET(height), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS, "h"},
+ { "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" },
+ { "mitchell", "mitchell interpolation", 0, AV_OPT_TYPE_CONST, {.i64=MITCHELL}, 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", "input cubemap pads", OFFSET(in_pad), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 1.f, FLAGS, "in_pad"},
- { "out_pad", "output cubemap pads", OFFSET(out_pad), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 1.f, FLAGS, "out_pad"},
- { "yaw", "yaw rotation", OFFSET(yaw), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180.f, 180.f, FLAGS, "yaw"},
- { "pitch", "pitch rotation", OFFSET(pitch), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180.f, 180.f, FLAGS, "pitch"},
- { "roll", "roll rotation", OFFSET(roll), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180.f, 180.f, FLAGS, "roll"},
- { "h_fov", "horizontal field of view", OFFSET(h_fov), AV_OPT_TYPE_FLOAT, {.dbl=90.f}, 0.f, 180.f, FLAGS, "h_fov"},
- { "v_fov", "vertical field of view", OFFSET(v_fov), AV_OPT_TYPE_FLOAT, {.dbl=45.f}, 0.f, 90.f, FLAGS, "v_fov"},
- { "h_flip", "flip video horizontally", OFFSET(h_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "h_flip"},
- { "v_flip", "flip video vertically", OFFSET(v_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "v_flip"},
- { "d_flip", "flip video indepth", OFFSET(d_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "d_flip"},
+ { "in_pad", "percent input cubemap pads", OFFSET(in_pad), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 0.1,TFLAGS, "in_pad"},
+ { "out_pad", "percent output cubemap pads", OFFSET(out_pad), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 0.1,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=0.f}, 0.f, 360.f,TFLAGS, "h_fov"},
+ { "v_fov", "output vertical field of view", OFFSET(v_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 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=0.f}, 0.f, 360.f,TFLAGS, "ih_fov"},
+ { "iv_fov", "input vertical field of view", OFFSET(iv_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 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 }
};
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_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(pix_fmts);
+ 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);
}
-typedef struct XYRemap1 {
- uint16_t u;
- uint16_t v;
-} XYRemap1;
+#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]]; \
+}
-/**
- * Generate no-interpolation remapping function with a given pixel depth.
- *
- * @param bits number of bits per pixel
- * @param div number of bytes per pixel
- */
-#define DEFINE_REMAP1(bits, div) \
-static int remap1_##bits##bit_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
-{ \
- ThreadData *td = (ThreadData*)arg; \
- const V360Context *s = td->s; \
- const AVFrame *in = td->in; \
- AVFrame *out = td->out; \
- \
- int plane, x, y; \
- \
- for (plane = 0; plane < td->nb_planes; plane++) { \
- const int in_linesize = in->linesize[plane] / div; \
- const int out_linesize = out->linesize[plane] / div; \
- const uint##bits##_t *src = (const uint##bits##_t *)in->data[plane]; \
- uint##bits##_t *dst = (uint##bits##_t *)out->data[plane]; \
- const XYRemap1 *remap = s->remap[plane]; \
- const int width = s->planewidth[plane]; \
- const int height = s->planeheight[plane]; \
- \
- const int slice_start = (height * jobnr ) / nb_jobs; \
- const int slice_end = (height * (jobnr + 1)) / nb_jobs; \
- \
- for (y = slice_start; y < slice_end; y++) { \
- uint##bits##_t *d = dst + y * out_linesize; \
- for (x = 0; x < width; x++) { \
- const XYRemap1 *r = &remap[y * width + x]; \
- \
- *d++ = src[r->v * in_linesize + r->u]; \
- } \
- } \
- } \
- \
- return 0; \
-}
-
-DEFINE_REMAP1( 8, 1)
-DEFINE_REMAP1(16, 2)
-
-typedef struct XYRemap2 {
- uint16_t u[2][2];
- uint16_t v[2][2];
- float ker[2][2];
-} XYRemap2;
-
-typedef struct XYRemap4 {
- uint16_t u[4][4];
- uint16_t v[4][4];
- float ker[4][4];
-} XYRemap4;
+DEFINE_REMAP1_LINE( 8, 1)
+DEFINE_REMAP1_LINE(16, 2)
/**
* Generate remapping function with a given window size and pixel depth.
*
- * @param window_size size of interpolation window
+ * @param ws size of interpolation window
* @param bits number of bits per pixel
- * @param div number of bytes per pixel
*/
-#define DEFINE_REMAP(window_size, bits, div) \
-static int remap##window_size##_##bits##bit_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
+#define DEFINE_REMAP(ws, bits) \
+static int remap##ws##_##bits##bit_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
{ \
- ThreadData *td = (ThreadData*)arg; \
- const V360Context *s = td->s; \
+ ThreadData *td = arg; \
+ const V360Context *s = ctx->priv; \
+ const SliceXYRemap *r = &s->slice_remap[jobnr]; \
const AVFrame *in = td->in; \
AVFrame *out = td->out; \
\
- int plane, x, y, i, j; \
- \
- for (plane = 0; plane < td->nb_planes; plane++) { \
- const int in_linesize = in->linesize[plane] / div; \
- const int out_linesize = out->linesize[plane] / div; \
- const uint##bits##_t *src = (const uint##bits##_t *)in->data[plane]; \
- uint##bits##_t *dst = (uint##bits##_t *)out->data[plane]; \
- const XYRemap##window_size *remap = s->remap[plane]; \
- const int width = s->planewidth[plane]; \
- const int height = s->planeheight[plane]; \
+ 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 ? r->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; \
+ const int slice_start = (height * jobnr ) / nb_jobs; \
+ const int slice_end = (height * (jobnr + 1)) / nb_jobs; \
\
- for (y = slice_start; y < slice_end; y++) { \
- uint##bits##_t *d = dst + y * out_linesize; \
- for (x = 0; x < width; x++) { \
- const XYRemap##window_size *r = &remap[y * width + x]; \
- float tmp = 0.f; \
+ for (int y = slice_start; y < slice_end && !mask; y++) { \
+ const int16_t *const u = r->u[map] + (y - slice_start) * uv_linesize * ws * ws; \
+ const int16_t *const v = r->v[map] + (y - slice_start) * uv_linesize * ws * ws; \
+ const int16_t *const ker = r->ker[map] + (y - slice_start) * uv_linesize * ws * ws; \
\
- for (i = 0; i < window_size; i++) { \
- for (j = 0; j < window_size; j++) { \
- tmp += r->ker[i][j] * src[r->v[i][j] * in_linesize + r->u[i][j]]; \
- } \
- } \
+ s->remap_line(dst + y * out_linesize, width, src, in_linesize, u, v, ker); \
+ } \
\
- *d++ = av_clip_uint##bits(roundf(tmp)); \
+ for (int y = slice_start; y < slice_end && mask; y++) { \
+ memcpy(dst + y * out_linesize, mask + \
+ (y - slice_start) * width * (bits >> 3), width * (bits >> 3)); \
} \
} \
} \
return 0; \
}
-DEFINE_REMAP(2, 8, 1)
-DEFINE_REMAP(4, 8, 1)
-DEFINE_REMAP(2, 16, 2)
-DEFINE_REMAP(4, 16, 2)
+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++) { \
+ const int iws = i * ws; \
+ for (int j = 0; j < ws; j++) { \
+ tmp += kker[iws + j] * s[vv[iws + j] * in_linesize + uu[iws + j]]; \
+ } \
+ } \
+ \
+ d[x] = av_clip_uint##bits(tmp >> 14); \
+ } \
+}
+
+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:
+ case MITCHELL:
+ 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 shift shift for remap array
- * @param r_tmp calculated 4x4 window
- * @param r_void remap data
+ * @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, int shift, const XYRemap4 *r_tmp, void *r_void)
+static void nearest_kernel(float du, float dv, const XYRemap *rmap,
+ int16_t *u, int16_t *v, int16_t *ker)
{
- XYRemap1 *r = (XYRemap1*)r_void + shift;
- const int i = roundf(dv) + 1;
- const int j = roundf(du) + 1;
+ const int i = lrintf(dv) + 1;
+ const int j = lrintf(du) + 1;
- r->u = r_tmp->u[i][j];
- r->v = r_tmp->v[i][j];
+ u[0] = rmap->u[i][j];
+ v[0] = rmap->v[i][j];
}
/**
*
* @param du horizontal relative coordinate
* @param dv vertical relative coordinate
- * @param shift shift for remap array
- * @param r_tmp calculated 4x4 window
- * @param r_void remap data
+ * @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, int shift, const XYRemap4 *r_tmp, void *r_void)
+static void bilinear_kernel(float du, float dv, const XYRemap *rmap,
+ int16_t *u, int16_t *v, int16_t *ker)
{
- XYRemap2 *r = (XYRemap2*)r_void + shift;
- int i, j;
-
- for (i = 0; i < 2; i++) {
- for (j = 0; j < 2; j++) {
- r->u[i][j] = r_tmp->u[i + 1][j + 1];
- r->v[i][j] = r_tmp->v[i + 1][j + 1];
+ 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];
}
}
- r->ker[0][0] = (1.f - du) * (1.f - dv);
- r->ker[0][1] = du * (1.f - dv);
- r->ker[1][0] = (1.f - du) * dv;
- r->ker[1][1] = du * dv;
+ 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);
+ }
+ }
}
/**
*
* @param du horizontal relative coordinate
* @param dv vertical relative coordinate
- * @param shift shift for remap array
- * @param r_tmp calculated 4x4 window
- * @param r_void remap data
+ * @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, int shift, const XYRemap4 *r_tmp, void *r_void)
+static void bicubic_kernel(float du, float dv, const XYRemap *rmap,
+ int16_t *u, int16_t *v, int16_t *ker)
{
- XYRemap4 *r = (XYRemap4*)r_void + shift;
- int i, j;
float du_coeffs[4];
float dv_coeffs[4];
calculate_bicubic_coeffs(du, du_coeffs);
calculate_bicubic_coeffs(dv, dv_coeffs);
- for (i = 0; i < 4; i++) {
- for (j = 0; j < 4; j++) {
- r->u[i][j] = r_tmp->u[i][j];
- r->v[i][j] = r_tmp->v[i][j];
- r->ker[i][j] = du_coeffs[j] * dv_coeffs[i];
+ 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);
}
}
}
*/
static inline void calculate_lanczos_coeffs(float t, float *coeffs)
{
- int i;
float sum = 0.f;
- for (i = 0; i < 4; i++) {
+ for (int i = 0; i < 4; i++) {
const float x = M_PI * (t - i + 1);
if (x == 0.f) {
coeffs[i] = 1.f;
sum += coeffs[i];
}
- for (i = 0; i < 4; i++) {
+ for (int i = 0; i < 4; i++) {
coeffs[i] /= sum;
}
}
*
* @param du horizontal relative coordinate
* @param dv vertical relative coordinate
- * @param shift shift for remap array
- * @param r_tmp calculated 4x4 window
- * @param r_void remap data
+ * @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, int shift, const XYRemap4 *r_tmp, void *r_void)
+static void lanczos_kernel(float du, float dv, const XYRemap *rmap,
+ int16_t *u, int16_t *v, int16_t *ker)
{
- XYRemap4 *r = (XYRemap4*)r_void + shift;
- int i, j;
float du_coeffs[4];
float dv_coeffs[4];
calculate_lanczos_coeffs(du, du_coeffs);
calculate_lanczos_coeffs(dv, dv_coeffs);
- for (i = 0; i < 4; i++) {
- for (j = 0; j < 4; j++) {
- r->u[i][j] = r_tmp->u[i][j];
- r->v[i][j] = r_tmp->v[i][j];
- r->ker[i][j] = du_coeffs[j] * dv_coeffs[i];
+ 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);
+ }
+ }
+}
+
+/**
+ * Calculate 1-dimensional cubic_bc_spline coefficients.
+ *
+ * @param t relative coordinate
+ * @param coeffs coefficients
+ */
+static void calculate_cubic_bc_coeffs(float t, float *coeffs,
+ float b, float c)
+{
+ float sum = 0.f;
+ float p0 = (6.f - 2.f * b) / 6.f,
+ p2 = (-18.f + 12.f * b + 6.f * c) / 6.f,
+ p3 = (12.f - 9.f * b - 6.f * c) / 6.f,
+ q0 = (8.f * b + 24.f * c) / 6.f,
+ q1 = (-12.f * b - 48.f * c) / 6.f,
+ q2 = (6.f * b + 30.f * c) / 6.f,
+ q3 = (-b - 6.f * c) / 6.f;
+
+ for (int i = 0; i < 4; i++) {
+ const float x = fabsf(t - i + 1.f);
+ if (x < 1.f) {
+ coeffs[i] = (p0 + x * x * (p2 + x * p3)) *
+ (p0 + x * x * (p2 + x * p3 / 2.f) / 4.f);
+ } else if (x < 2.f) {
+ coeffs[i] = (q0 + x * (q1 + x * (q2 + x * q3))) *
+ (q0 + x * (q1 + x * (q2 + x / 2.f * q3) / 2.f) / 2.f);
+ } else {
+ coeffs[i] = 0.f;
+ }
+ sum += coeffs[i];
+ }
+
+ for (int i = 0; i < 4; i++) {
+ coeffs[i] /= sum;
+ }
+}
+
+/**
+ * Calculate kernel for mitchell 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 mitchell_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_cubic_bc_coeffs(du, du_coeffs, 1.f / 3.f, 1.f / 3.f);
+ calculate_cubic_bc_coeffs(dv, dv_coeffs, 1.f / 3.f, 1.f / 3.f);
+
+ 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);
}
}
}
}
}
+/**
+ * Reflect y operation.
+ *
+ * @param y input vertical position
+ * @param h input height
+ */
+static inline int reflecty(int y, int h)
+{
+ if (y < 0) {
+ y = -y;
+ } else if (y >= h) {
+ y = 2 * h - 1 - y;
+ }
+
+ return av_clip(y, 0, h - 1);
+}
+
+/**
+ * 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.
}
}
+/**
+ * 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.
*
*uf = *vf;
*vf = tmp;
break;
+ default:
+ av_assert0(0);
}
}
*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 context
+ * @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 *vec, float scalew, float scaleh)
{
const int direction = s->out_cubemap_direction_order[face];
- float norm;
float l_x, l_y, l_z;
- uf /= (1.f - s->out_pad);
- vf /= (1.f - s->out_pad);
+ 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;
+ l_y = vf;
+ l_z = -uf;
break;
case LEFT:
l_x = -1.f;
- l_y = -vf;
- l_z = -uf;
+ l_y = vf;
+ l_z = uf;
break;
case UP:
l_x = uf;
- l_y = 1.f;
- l_z = -vf;
+ l_y = -1.f;
+ l_z = vf;
break;
case DOWN:
l_x = uf;
- l_y = -1.f;
- l_z = vf;
+ l_y = 1.f;
+ l_z = -vf;
break;
case FRONT:
l_x = uf;
- l_y = -vf;
- l_z = -1.f;
+ l_y = vf;
+ l_z = 1.f;
break;
case BACK:
l_x = -uf;
- l_y = -vf;
- l_z = 1.f;
+ l_y = vf;
+ l_z = -1.f;
break;
+ default:
+ av_assert0(0);
}
- norm = sqrtf(l_x * l_x + l_y * l_y + l_z * l_z);
- vec[0] = l_x / norm;
- vec[1] = l_y / norm;
- vec[2] = l_z / norm;
+ 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 context
+ * @param s filter private context
* @param vec coordinated on sphere
* @param uf horizontal cubemap coordinate [0, 1)
* @param vf vertical cubemap coordinate [0, 1)
const float *vec,
float *uf, float *vf, int *direction)
{
- const float phi = atan2f(vec[0], -vec[2]);
- const float theta = asinf(-vec[1]);
+ const float phi = atan2f(vec[0], vec[2]);
+ const float theta = asinf(vec[1]);
float phi_norm, theta_threshold;
int face;
switch (*direction) {
case RIGHT:
- *uf = vec[2] / vec[0];
- *vf = -vec[1] / vec[0];
+ *uf = -vec[2] / vec[0];
+ *vf = vec[1] / vec[0];
break;
case LEFT:
- *uf = vec[2] / vec[0];
- *vf = vec[1] / vec[0];
+ *uf = -vec[2] / vec[0];
+ *vf = -vec[1] / vec[0];
break;
case UP:
- *uf = vec[0] / vec[1];
+ *uf = -vec[0] / vec[1];
*vf = -vec[2] / vec[1];
break;
case DOWN:
- *uf = -vec[0] / vec[1];
+ *uf = vec[0] / vec[1];
*vf = -vec[2] / vec[1];
break;
case FRONT:
- *uf = -vec[0] / vec[2];
+ *uf = vec[0] / vec[2];
*vf = vec[1] / vec[2];
break;
case BACK:
- *uf = -vec[0] / vec[2];
+ *uf = vec[0] / vec[2];
*vf = -vec[1] / vec[2];
break;
+ default:
+ av_assert0(0);
}
face = s->in_cubemap_face_order[*direction];
* Find position on another cube face in case of overflow/underflow.
* Used for calculation of interpolation window.
*
- * @param s filter context
+ * @param s filter private context
* @param uf horizontal cubemap coordinate
* @param vf vertical cubemap coordinate
* @param direction direction of view
* @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)
+ float uf, float vf, int direction,
+ float *new_uf, float *new_vf, int *face)
{
/*
* Cubemap orientation
*new_uf = uf;
*new_vf = vf;
break;
+ default:
+ av_assert0(0);
}
} else if (uf >= 1.f) {
uf -= 2.f;
*new_uf = uf;
*new_vf = vf;
break;
+ default:
+ av_assert0(0);
}
} else if (vf < -1.f) {
vf += 2.f;
*new_uf = -uf;
*new_vf = -vf;
break;
+ default:
+ av_assert0(0);
}
} else if (vf >= 1.f) {
vf -= 2.f;
*new_uf = -uf;
*new_vf = -vf;
break;
+ default:
+ av_assert0(0);
}
} else {
// Inside cube face
/**
* Calculate 3D coordinates on sphere for corresponding frame position in cubemap3x2 format.
*
- * @param s filter context
- * @param i horizontal position on frame [0, height)
- * @param j vertical position on frame [0, width)
+ * @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 void cube3x2_to_xyz(const V360Context *s,
- int i, int j, int width, int height,
- float *vec)
+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 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) / ewi - 1.f;
- const float vf = 2.f * (j - v_shift) / ehi - 1.f;
+ 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);
- cube_to_xyz(s, uf, vf, face, vec);
+ return 1;
}
/**
* Calculate frame position in cubemap3x2 format for corresponding 3D coordinates on sphere.
*
- * @param s filter context
+ * @param s filter private context
* @param vec coordinates on sphere
* @param width frame width
* @param height frame height
* @param du horizontal relative coordinate
* @param dv vertical relative coordinate
*/
-static void xyz_to_cube3x2(const V360Context *s,
- const float *vec, int width, int height,
- uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv)
+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 i, j;
int direction, face;
int u_face, v_face;
xyz_to_cube(s, vec, &uf, &vf, &direction);
- uf *= (1.f - s->in_pad);
- vf *= (1.f - s->in_pad);
+ uf *= scalew;
+ vf *= scaleh;
face = s->in_cubemap_face_order[direction];
u_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);
- vf = 0.5f * ehi * (vf + 1.f);
+ 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 (i = -1; i < 3; i++) {
- for (j = -1; j < 3; j++) {
- int new_ui = ui + j;
- int new_vi = vi + i;
+ 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;
uf = 2.f * new_ui / ewi - 1.f;
vf = 2.f * new_vi / ehi - 1.f;
- uf /= (1.f - s->in_pad);
- vf /= (1.f - s->in_pad);
+ uf /= scalew;
+ vf /= scaleh;
process_cube_coordinates(s, uf, vf, direction, &uf, &vf, &face);
- uf *= (1.f - s->in_pad);
- vf *= (1.f - s->in_pad);
+ uf *= scalew;
+ vf *= scaleh;
u_face = face % 3;
v_face = face / 3;
new_ewi = ceilf(ew * (u_face + 1)) - u_shift;
new_ehi = ceilf(eh * (v_face + 1)) - v_shift;
- new_ui = av_clip(roundf(0.5f * new_ewi * (uf + 1.f)), 0, new_ewi - 1);
- new_vi = av_clip(roundf(0.5f * new_ehi * (vf + 1.f)), 0, new_ehi - 1);
+ 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 + 1][j + 1] = u_shift + new_ui;
- vs[i + 1][j + 1] = v_shift + new_vi;
+ 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 cubemap6x1 format.
+ * Calculate 3D coordinates on sphere for corresponding frame position in cubemap1x6 format.
*
- * @param s filter context
- * @param i horizontal position on frame [0, height)
- * @param j vertical position on frame [0, width)
+ * @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 void cube6x1_to_xyz(const V360Context *s,
- int i, int j, int width, int height,
- float *vec)
+static int cube1x6_to_xyz(const V360Context *s,
+ int i, int j, int width, int height,
+ float *vec)
{
- const float ew = width / 6.f;
- const float eh = height;
+ 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 int face = floorf(i / ew);
+ const float ew = width;
+ const float eh = height / 6.f;
- const int u_shift = ceilf(ew * face);
- const int ewi = ceilf(ew * (face + 1)) - u_shift;
+ 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 - u_shift) / ewi - 1.f;
- const float vf = 2.f * j / eh - 1.f;
+ 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);
+ cube_to_xyz(s, uf, vf, face, vec, scalew, scaleh);
+
+ return 1;
}
/**
- * Calculate frame position in cubemap6x1 format for corresponding 3D coordinates on sphere.
+ * Calculate 3D coordinates on sphere for corresponding frame position in cubemap6x1 format.
*
- * @param s filter context
- * @param vec coordinates on sphere
+ * @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 us horizontal coordinates for interpolation window
- * @param vs vertical coordinates for interpolation window
+ * @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 void xyz_to_cube6x1(const V360Context *s,
- const float *vec, int width, int height,
- uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv)
+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 i, j;
int direction, face;
xyz_to_cube(s, vec, &uf, &vf, &direction);
- uf *= (1.f - s->in_pad);
- vf *= (1.f - s->in_pad);
+ 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);
- vf = 0.5f * ehi * (vf + 1.f);
+ 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 (i = -1; i < 3; i++) {
- for (j = -1; j < 3; j++) {
- int new_ui = ui + j;
- int new_vi = vi + i;
+ 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;
uf = 2.f * new_ui / ewi - 1.f;
vf = 2.f * new_vi / ehi - 1.f;
- uf /= (1.f - s->in_pad);
- vf /= (1.f - s->in_pad);
+ uf /= scalew;
+ vf /= scaleh;
process_cube_coordinates(s, uf, vf, direction, &uf, &vf, &face);
- uf *= (1.f - s->in_pad);
- vf *= (1.f - s->in_pad);
+ uf *= scalew;
+ vf *= scaleh;
u_shift = ceilf(ew * face);
new_ewi = ceilf(ew * (face + 1)) - u_shift;
- new_ui = av_clip(roundf(0.5f * new_ewi * (uf + 1.f)), 0, new_ewi - 1);
- new_vi = av_clip(roundf(0.5f * ehi * (vf + 1.f)), 0, ehi - 1);
+ 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 + 1][j + 1] = u_shift + new_ui;
- vs[i + 1][j + 1] = new_vi;
+ us[i][j] = u_shift + new_ui;
+ vs[i][j] = new_vi;
}
}
+
+ return 1;
+}
+
+/**
+ * Prepare data for processing equirectangular output format.
+ *
+ * @param ctx filter context
+ *
+ * @return error code
+ */
+static int prepare_equirect_out(AVFilterContext *ctx)
+{
+ V360Context *s = ctx->priv;
+
+ s->flat_range[0] = s->h_fov * M_PI / 360.f;
+ s->flat_range[1] = s->v_fov * M_PI / 360.f;
+
+ return 0;
}
/**
* Calculate 3D coordinates on sphere for corresponding frame position in equirectangular format.
*
- * @param s filter context
- * @param i horizontal position on frame [0, height)
- * @param j vertical position on frame [0, width)
+ * @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 void equirect_to_xyz(const V360Context *s,
- int i, int j, int width, int height,
- float *vec)
+static int equirect_to_xyz(const V360Context *s,
+ int i, int j, int width, int height,
+ float *vec)
{
- const float phi = ((2.f * i) / width - 1.f) * M_PI;
- const float theta = ((2.f * j) / height - 1.f) * M_PI_2;
+ const float phi = ((2.f * i + 0.5f) / width - 1.f) * s->flat_range[0];
+ const float theta = ((2.f * j + 0.5f) / height - 1.f) * s->flat_range[1];
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;
+ vec[0] = cos_theta * sin_phi;
+ vec[1] = sin_theta;
+ vec[2] = cos_theta * cos_phi;
+
+ return 1;
}
/**
- * Calculate frame position in equirectangular format for corresponding 3D coordinates on sphere.
+ * Calculate 3D coordinates on sphere for corresponding frame position in half equirectangular format.
*
- * @param s filter context
- * @param vec coordinates on sphere
+ * @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 us horizontal coordinates for interpolation window
- * @param vs vertical coordinates for interpolation window
- * @param du horizontal relative coordinate
- * @param dv vertical relative coordinate
+ * @param vec coordinates on sphere
*/
-static void xyz_to_equirect(const V360Context *s,
- const float *vec, int width, int height,
- uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv)
+static int hequirect_to_xyz(const V360Context *s,
+ int i, int j, int width, int height,
+ float *vec)
{
- const float phi = atan2f(vec[0], -vec[2]);
- const float theta = asinf(-vec[1]);
- float uf, vf;
- int ui, vi;
- int i, j;
+ 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;
- uf = (phi / M_PI + 1.f) * width / 2.f;
- vf = (theta / M_PI_2 + 1.f) * height / 2.f;
- ui = floorf(uf);
- vi = floorf(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);
- *du = uf - ui;
- *dv = vf - vi;
+ vec[0] = cos_theta * sin_phi;
+ vec[1] = sin_theta;
+ vec[2] = cos_theta * cos_phi;
- for (i = -1; i < 3; i++) {
- for (j = -1; j < 3; j++) {
- us[i + 1][j + 1] = mod(ui + j, width);
- vs[i + 1][j + 1] = av_clip(vi + i, 0, height - 1);
- }
- }
+ return 1;
}
/**
- * Prepare data for processing equi-angular cubemap input format.
+ * Prepare data for processing stereographic output format.
*
* @param ctx filter context
-
+ *
* @return error code
*/
-static int prepare_eac_in(AVFilterContext *ctx)
+static int prepare_stereographic_out(AVFilterContext *ctx)
{
V360Context *s = ctx->priv;
- s->in_cubemap_face_order[RIGHT] = TOP_RIGHT;
- s->in_cubemap_face_order[LEFT] = TOP_LEFT;
- s->in_cubemap_face_order[UP] = BOTTOM_RIGHT;
- s->in_cubemap_face_order[DOWN] = BOTTOM_LEFT;
- s->in_cubemap_face_order[FRONT] = TOP_MIDDLE;
- s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE;
-
- 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;
+ 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;
}
/**
- * Prepare data for processing equi-angular cubemap output format.
+ * 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_eac_out(AVFilterContext *ctx)
+static int prepare_stereographic_in(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;
+ 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 3D coordinates on sphere for corresponding frame position in equi-angular cubemap format.
+ * Calculate frame position in stereographic format for corresponding 3D coordinates on sphere.
*
- * @param s filter context
- * @param i horizontal position on frame [0, height)
- * @param j vertical position on frame [0, width)
+ * @param s filter private context
+ * @param vec coordinates on sphere
* @param width frame width
* @param height frame height
- * @param vec coordinates on sphere
+ * @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 void eac_to_xyz(const V360Context *s,
- int i, int j, int width, int height,
- float *vec)
+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 pixel_pad = 2;
- const float u_pad = pixel_pad / width;
- const float v_pad = pixel_pad / height;
+ 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];
+ const float y = vec[1] * c / s->iflat_range[1];
- int u_face, v_face, face;
+ const float uf = (x + 1.f) * width / 2.f;
+ const float vf = (y + 1.f) * height / 2.f;
- float l_x, l_y, l_z;
- float norm;
+ const int ui = floorf(uf);
+ const int vi = floorf(vf);
- float uf = (float)i / width;
- float vf = (float)j / height;
+ const int visible = isfinite(x) && isfinite(y) && vi >= 0 && vi < height && ui >= 0 && ui < width;
- // 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
+ *du = visible ? uf - ui : 0.f;
+ *dv = visible ? vf - vi : 0.f;
- // 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;
+ 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;
+ }
}
- // 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;
- }
+ return visible;
+}
- face = u_face + 3 * v_face;
+/**
+ * Prepare data for processing equisolid output format.
+ *
+ * @param ctx filter context
+ *
+ * @return error code
+ */
+static int prepare_equisolid_out(AVFilterContext *ctx)
+{
+ V360Context *s = ctx->priv;
- 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;
- }
+ s->flat_range[0] = sinf(s->h_fov * M_PI / 720.f);
+ s->flat_range[1] = sinf(s->v_fov * M_PI / 720.f);
- norm = sqrtf(l_x * l_x + l_y * l_y + l_z * l_z);
- vec[0] = l_x / norm;
- vec[1] = l_y / norm;
- vec[2] = l_z / norm;
+ return 0;
}
/**
- * Calculate frame position in equi-angular cubemap format for corresponding 3D coordinates on sphere.
+ * Calculate 3D coordinates on sphere for corresponding frame position in equisolid format.
*
- * @param s filter context
- * @param vec coordinates on sphere
+ * @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 us horizontal coordinates for interpolation window
- * @param vs vertical coordinates for interpolation window
- * @param du horizontal relative coordinate
- * @param dv vertical relative coordinate
+ * @param vec coordinates on sphere
*/
-static void xyz_to_eac(const V360Context *s,
- const float *vec, int width, int height,
- uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv)
+static int equisolid_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;
+ 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 = asinf(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 equisolid input format.
+ *
+ * @param ctx filter context
+ *
+ * @return error code
+ */
+static int prepare_equisolid_in(AVFilterContext *ctx)
+{
+ V360Context *s = ctx->priv;
+
+ s->iflat_range[0] = sinf(FFMIN(s->ih_fov, 359.f) * M_PI / 720.f);
+ s->iflat_range[1] = sinf(FFMIN(s->iv_fov, 359.f) * M_PI / 720.f);
+
+ return 0;
+}
+
+/**
+ * Calculate frame position in equisolid 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_equisolid(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
+{
+ const float theta = acosf(vec[2]);
+ const float r = sinf(theta * 0.5f);
+ const float c = r / hypotf(vec[0], vec[1]);
+ const float x = vec[0] * c / s->iflat_range[0];
+ const float y = vec[1] * c / s->iflat_range[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;
+}
+
+/**
+ * Prepare data for processing orthographic output format.
+ *
+ * @param ctx filter context
+ *
+ * @return error code
+ */
+static int prepare_orthographic_out(AVFilterContext *ctx)
+{
+ V360Context *s = ctx->priv;
+
+ s->flat_range[0] = sinf(FFMIN(s->h_fov, 180.f) * M_PI / 360.f);
+ s->flat_range[1] = sinf(FFMIN(s->v_fov, 180.f) * M_PI / 360.f);
+
+ return 0;
+}
+
+/**
+ * Calculate 3D coordinates on sphere for corresponding frame position in orthographic 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 orthographic_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 = asinf(r);
+
+ vec[0] = x;
+ vec[1] = y;
+ vec[2] = cosf(theta);
+
+ normalize_vector(vec);
+
+ return 1;
+}
+
+/**
+ * Prepare data for processing orthographic input format.
+ *
+ * @param ctx filter context
+ *
+ * @return error code
+ */
+static int prepare_orthographic_in(AVFilterContext *ctx)
+{
+ V360Context *s = ctx->priv;
+
+ s->iflat_range[0] = sinf(FFMIN(s->ih_fov, 180.f) * M_PI / 360.f);
+ s->iflat_range[1] = sinf(FFMIN(s->iv_fov, 180.f) * M_PI / 360.f);
+
+ return 0;
+}
+
+/**
+ * Calculate frame position in orthographic 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_orthographic(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
+{
+ const float theta = acosf(vec[2]);
+ const float r = sinf(theta);
+ const float c = r / hypotf(vec[0], vec[1]);
+ const float x = vec[0] * c / s->iflat_range[0];
+ const float y = vec[1] * c / s->iflat_range[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 = vec[2] >= 0.f && 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;
+}
+
+/**
+ * Prepare data for processing equirectangular input format.
+ *
+ * @param ctx filter context
+ *
+ * @return error code
+ */
+static int prepare_equirect_in(AVFilterContext *ctx)
+{
+ V360Context *s = ctx->priv;
+
+ s->iflat_range[0] = s->ih_fov * M_PI / 360.f;
+ s->iflat_range[1] = s->iv_fov * M_PI / 360.f;
+
+ return 0;
+}
+
+/**
+ * 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]);
+ const float theta = asinf(vec[1]);
+
+ const float uf = (phi / s->iflat_range[0] + 1.f) * width / 2.f;
+ const float vf = (theta / s->iflat_range[1] + 1.f) * height / 2.f;
+
+ const int ui = floorf(uf);
+ const int vi = floorf(vf);
+ int visible;
+
+ *du = uf - ui;
+ *dv = vf - vi;
+
+ visible = vi >= 0 && vi < height && ui >= 0 && ui < width;
+
+ 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 visible;
+}
+
+/**
+ * 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]);
+ const float theta = asinf(vec[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];
+ float vf = vec[1] * c / s->iflat_range[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]);
+ const float theta = vec[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] / (l > 0.f ? l : 1.f)) * width * 0.5f;
+ const float vf = (1.f + r * vec[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]);
+
+ 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;
+
+ 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]);
+ const float phi = atan2f(vec[0], vec[2]) * 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;
+
+ s->in_cubemap_face_order[RIGHT] = TOP_RIGHT;
+ s->in_cubemap_face_order[LEFT] = TOP_LEFT;
+ s->in_cubemap_face_order[UP] = BOTTOM_RIGHT;
+ s->in_cubemap_face_order[DOWN] = BOTTOM_LEFT;
+ s->in_cubemap_face_order[FRONT] = TOP_MIDDLE;
+ s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE;
+
+ s->in_cubemap_face_rotation[TOP_LEFT] = ROT_0;
+ s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_0;
+ s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_0;
+ s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_270;
+ s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_90;
+ s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_270;
+
+ 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->iflat_range[0];
+ float vf = vec[1] / lh * phi / 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]);
+ const float theta = asinf(vec[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->iflat_range[0];
+ const float theta = asinf(vec[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] = cos_theta * cos_phi;
+ vec[2] = sin_theta;
+ } 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 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;
+
+ 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 + 0.25f;
+ } else {
+ uf = 0.75f - 0.25f * x;
+ }
+
+ 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 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 = s->flat_range[0] * ((2.f * ei) / ew - 1.f);
+ const float vf = s->flat_range[1] * ((2.f * j + 1.f) / eh - 1.f);
+
+ 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 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->iflat_range[0] + 0.5f) * ew;
+ float vf = (theta * (vec[1] / lh) / s->iflat_range[1] + 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]);
+ const float theta = asinf(vec[1]);
+ const float theta_range = M_PI_4;
+
+ int ew, eh;
+ int u_shift, v_shift;
float uf, vf;
int ui, vi;
- int i, j;
- int direction, face;
- int u_face, v_face;
- xyz_to_cube(s, vec, &uf, &vf, &direction);
+ if (theta > -theta_range && theta < theta_range) {
+ ew = 4 * width / 5;
+ eh = height;
- face = s->in_cubemap_face_order[direction];
- u_face = face % 3;
- v_face = face / 3;
+ u_shift = 0;
+ v_shift = 0;
- uf = M_2_PI * atanf(uf) + 0.5f;
- vf = M_2_PI * atanf(vf) + 0.5f;
+ 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 = 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;
+ }
- // 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 = 0.5f * ew * (uf * scale + 1.f);
+ vf = 0.5f * eh * (vf * scale + 1.f);
+ }
- 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] = 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]);
+ const float theta = asinf(vec[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 = 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 = 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 = 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 (i = -1; i < 3; i++) {
- for (j = -1; j < 3; j++) {
- us[i + 1][j + 1] = av_clip(ui + j, 0, width - 1);
- vs[i + 1][j + 1] = av_clip(vi + i, 0, height - 1);
+ 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;
}
/**
- * Prepare data for processing flat output format.
+ * Calculate 3D coordinates on sphere for corresponding frame position in barrel split facebook's format.
*
- * @param ctx filter context
+ * @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.
*
- * @return error code
+ * @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 prepare_flat_out(AVFilterContext *ctx)
+static int tspyramid_to_xyz(const V360Context *s,
+ int i, int j, int width, int height,
+ float *vec)
{
- V360Context *s = ctx->priv;
+ 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;
- const float h_angle = 0.5f * s->h_fov * M_PI / 180.f;
- const float v_angle = 0.5f * s->v_fov * M_PI / 180.f;
+ ui = floorf(uf);
+ vi = floorf(vf);
- const float sin_phi = sinf(h_angle);
- const float cos_phi = cosf(h_angle);
- const float sin_theta = sinf(v_angle);
- const float cos_theta = cosf(v_angle);
+ *du = uf - ui;
+ *dv = vf - vi;
- s->flat_range[0] = cos_theta * sin_phi;
- s->flat_range[1] = sin_theta;
- s->flat_range[2] = -cos_theta * cos_phi;
+ 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 0;
+ return 1;
}
/**
- * Calculate 3D coordinates on sphere for corresponding frame position in flat format.
+ * Calculate 3D coordinates on sphere for corresponding frame position in octahedron format.
*
- * @param s filter context
- * @param i horizontal position on frame [0, height)
- * @param j vertical position on frame [0, width)
+ * @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 void flat_to_xyz(const V360Context *s,
- int i, int j, int width, int height,
- float *vec)
+static int octahedron_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 / width - 1.f);
- const float l_y = -s->flat_range[1] * (2.f * j / height - 1.f);
- const float l_z = s->flat_range[2];
+ const float x = ((i + 0.5f) / width) * 2.f - 1.f;
+ const float y = ((j + 0.5f) / height) * 2.f - 1.f;
+ const float ax = fabsf(x);
+ const float ay = fabsf(y);
+
+ vec[2] = 1.f - (ax + ay);
+ if (ax + ay > 1.f) {
+ vec[0] = (1.f - ay) * FFSIGN(x);
+ vec[1] = (1.f - ax) * FFSIGN(y);
+ } else {
+ vec[0] = x;
+ vec[1] = y;
+ }
- const float norm = sqrtf(l_x * l_x + l_y * l_y + l_z * l_z);
+ normalize_vector(vec);
- vec[0] = l_x / norm;
- vec[1] = l_y / norm;
- vec[2] = l_z / norm;
+ return 1;
}
/**
- * Calculate frame position in dual fisheye format for corresponding 3D coordinates on sphere.
+ * Calculate frame position in octahedron format for corresponding 3D coordinates on sphere.
*
- * @param s filter context
+ * @param s filter private context
* @param vec coordinates on sphere
* @param width frame width
* @param height frame height
* @param du horizontal relative coordinate
* @param dv vertical relative coordinate
*/
-static void xyz_to_dfisheye(const V360Context *s,
- const float *vec, int width, int height,
- uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv)
+static int xyz_to_octahedron(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
{
- const float scale = 1.f - s->in_pad;
-
- const float ew = width / 2.f;
- const float eh = height;
+ float uf, vf, zf;
+ int ui, vi;
+ float div = fabsf(vec[0]) + fabsf(vec[1]) + fabsf(vec[2]);
- const float phi = atan2f(-vec[1], -vec[0]);
- const float theta = acosf(fabsf(vec[2])) / M_PI;
+ uf = vec[0] / div;
+ vf = vec[1] / div;
+ zf = vec[2];
- float uf = (theta * cosf(phi) * scale + 0.5f) * ew;
- float vf = (theta * sinf(phi) * scale + 0.5f) * eh;
+ if (zf < 0.f) {
+ zf = vf;
+ vf = (1.f - fabsf(uf)) * FFSIGN(zf);
+ uf = (1.f - fabsf(zf)) * FFSIGN(uf);
+ }
- int ui, vi;
- int u_shift;
- int i, j;
+ uf = uf * 0.5f + 0.5f;
+ vf = vf * 0.5f + 0.5f;
- if (vec[2] >= 0) {
- u_shift = 0;
- } else {
- u_shift = ceilf(ew);
- uf = ew - uf;
- }
+ uf *= width;
+ vf *= height;
ui = floorf(uf);
vi = floorf(vf);
*du = uf - ui;
*dv = vf - vi;
- for (i = -1; i < 3; i++) {
- for (j = -1; j < 3; j++) {
- us[i + 1][j + 1] = av_clip(u_shift + ui + j, 0, width - 1);
- vs[i + 1][j + 1] = av_clip( vi + i, 0, height - 1);
+ 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;
+}
+
+static void multiply_quaternion(float c[4], const float a[4], const float b[4])
+{
+ c[0] = a[0] * b[0] - a[1] * b[1] - a[2] * b[2] - a[3] * b[3];
+ c[1] = a[1] * b[0] + a[0] * b[1] + a[2] * b[3] - a[3] * b[2];
+ c[2] = a[2] * b[0] + a[0] * b[2] + a[3] * b[1] - a[1] * b[3];
+ c[3] = a[3] * b[0] + a[0] * b[3] + a[1] * b[2] - a[2] * b[1];
+}
+
+static void conjugate_quaternion(float d[4], const float q[4])
+{
+ d[0] = q[0];
+ d[1] = -q[1];
+ d[2] = -q[2];
+ d[3] = -q[3];
}
/**
- * Calculate rotation matrix for yaw/pitch/roll angles.
+ * Calculate rotation quaternion for yaw/pitch/roll angles.
*/
-static inline void calculate_rotation_matrix(float yaw, float pitch, float roll,
- float rot_mat[3][3])
+static inline void calculate_rotation(float yaw, float pitch, float roll,
+ float rot_quaternion[2][4],
+ 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);
+ const float sin_yaw = sinf(yaw_rad * 0.5f);
+ const float cos_yaw = cosf(yaw_rad * 0.5f);
+ const float sin_pitch = sinf(pitch_rad * 0.5f);
+ const float cos_pitch = cosf(pitch_rad * 0.5f);
+ const float sin_roll = sinf(roll_rad * 0.5f);
+ const float cos_roll = cosf(roll_rad * 0.5f);
- rot_mat[0][0] = sin_yaw * sin_pitch * sin_roll + cos_yaw * cos_roll;
- rot_mat[0][1] = sin_yaw * sin_pitch * cos_roll - cos_yaw * sin_roll;
- rot_mat[0][2] = sin_yaw * cos_pitch;
+ float m[3][4];
+ float tmp[2][4];
- rot_mat[1][0] = cos_pitch * sin_roll;
- rot_mat[1][1] = cos_pitch * cos_roll;
- rot_mat[1][2] = -sin_pitch;
+ m[0][0] = cos_yaw; m[0][1] = 0.f; m[0][2] = sin_yaw; m[0][3] = 0.f;
+ m[1][0] = cos_pitch; m[1][1] = sin_pitch; m[1][2] = 0.f; m[1][3] = 0.f;
+ m[2][0] = cos_roll; m[2][1] = 0.f; m[2][2] = 0.f; m[2][3] = sin_roll;
- rot_mat[2][0] = cos_yaw * sin_pitch * sin_roll - sin_yaw * cos_roll;
- rot_mat[2][1] = cos_yaw * sin_pitch * cos_roll + sin_yaw * sin_roll;
- rot_mat[2][2] = cos_yaw * cos_pitch;
+ multiply_quaternion(tmp[0], rot_quaternion[0], m[rotation_order[0]]);
+ multiply_quaternion(tmp[1], tmp[0], m[rotation_order[1]]);
+ multiply_quaternion(rot_quaternion[0], tmp[1], m[rotation_order[2]]);
+
+ conjugate_quaternion(rot_quaternion[1], rot_quaternion[0]);
}
/**
- * Rotate vector with given rotation matrix.
+ * Rotate vector with given rotation quaternion.
*
- * @param rot_mat rotation matrix
+ * @param rot_quaternion rotation quaternion
* @param vec vector
*/
-static inline void rotate(const float rot_mat[3][3],
+static inline void rotate(const float rot_quaternion[2][4],
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];
+ float qv[4], temp[4], rqv[4];
+
+ qv[0] = 0.f;
+ qv[1] = vec[0];
+ qv[2] = vec[1];
+ qv[3] = vec[2];
- vec[0] = x_tmp;
- vec[1] = y_tmp;
- vec[2] = z_tmp;
+ multiply_quaternion(temp, rot_quaternion[0], qv);
+ multiply_quaternion(rqv, temp, rot_quaternion[1]);
+
+ vec[0] = rqv[1];
+ vec[1] = rqv[2];
+ vec[2] = rqv[3];
}
static inline void set_mirror_modifier(int h_flip, int v_flip, int d_flip,
modifier[2] = d_flip ? -1.f : 1.f;
}
-static inline void mirror(const float *modifier,
- float *vec)
+static inline void mirror(const float *modifier, float *vec)
{
vec[0] *= modifier[0];
vec[1] *= modifier[1];
vec[2] *= modifier[2];
}
+static inline void input_flip(int16_t u[4][4], int16_t v[4][4], int w, int h, int hflip, int vflip)
+{
+ if (hflip) {
+ for (int i = 0; i < 4; i++) {
+ for (int j = 0; j < 4; j++)
+ u[i][j] = w - 1 - u[i][j];
+ }
+ }
+
+ if (vflip) {
+ for (int i = 0; i < 4; i++) {
+ for (int j = 0; j < 4; j++)
+ v[i][j] = h - 1 - v[i][j];
+ }
+ }
+}
+
+static int allocate_plane(V360Context *s, int sizeof_uv, int sizeof_ker, int sizeof_mask, int p)
+{
+ const int pr_height = s->pr_height[p];
+
+ for (int n = 0; n < s->nb_threads; n++) {
+ SliceXYRemap *r = &s->slice_remap[n];
+ const int slice_start = (pr_height * n ) / s->nb_threads;
+ const int slice_end = (pr_height * (n + 1)) / s->nb_threads;
+ const int height = slice_end - slice_start;
+
+ if (!r->u[p])
+ r->u[p] = av_calloc(s->uv_linesize[p] * height, sizeof_uv);
+ if (!r->v[p])
+ r->v[p] = av_calloc(s->uv_linesize[p] * height, sizeof_uv);
+ if (!r->u[p] || !r->v[p])
+ return AVERROR(ENOMEM);
+ if (sizeof_ker) {
+ if (!r->ker[p])
+ r->ker[p] = av_calloc(s->uv_linesize[p] * height, sizeof_ker);
+ if (!r->ker[p])
+ return AVERROR(ENOMEM);
+ }
+
+ if (sizeof_mask && !p) {
+ if (!r->mask)
+ r->mask = av_calloc(s->pr_width[p] * height, sizeof_mask);
+ if (!r->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 EQUIRECTANGULAR:
+ *h_fov = d_fov;
+ *v_fov = d_fov * 0.5f;
+ break;
+ case ORTHOGRAPHIC:
+ {
+ const float d = 0.5f * hypotf(w, h);
+ const float l = sinf(d_fov * M_PI / 360.f) / d;
+
+ *h_fov = asinf(w * 0.5 * l) * 360.f / M_PI;
+ *v_fov = asinf(h * 0.5 * l) * 360.f / M_PI;
+
+ if (d_fov > 180.f) {
+ *h_fov = 180.f - *h_fov;
+ *v_fov = 180.f - *v_fov;
+ }
+ }
+ break;
+ case EQUISOLID:
+ {
+ const float d = 0.5f * hypotf(w, h);
+ const float l = d / (sinf(d_fov * M_PI / 720.f));
+
+ *h_fov = 2.f * asinf(w * 0.5f / l) * 360.f / M_PI;
+ *v_fov = 2.f * asinf(h * 0.5f / l) * 360.f / M_PI;
+ }
+ break;
+ 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 DUAL_FISHEYE:
+ {
+ const float d = hypotf(w * 0.5f, h);
+
+ *h_fov = 0.5f * w / d * d_fov;
+ *v_fov = h / d * d_fov;
+ }
+ break;
+ case FISHEYE:
+ {
+ const float d = hypotf(w, h);
+
+ *h_fov = w / d * d_fov;
+ *v_fov = h / d * 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;
+ SliceXYRemap *r = &s->slice_remap[jobnr];
+
+ 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;
+ const int elements = s->elements;
+ 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 = r->u[p] + ((j - slice_start) * uv_linesize + i) * elements;
+ int16_t *v = r->v[p] + ((j - slice_start) * uv_linesize + i) * elements;
+ int16_t *ker = r->ker[p] + ((j - slice_start) * uv_linesize + i) * elements;
+ uint8_t *mask8 = p ? NULL : r->mask + ((j - slice_start) * s->pr_width[0] + i);
+ uint16_t *mask16 = p ? NULL : (uint16_t *)r->mask + ((j - slice_start) * 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_quaternion, 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);
+ input_flip(rmap.u, rmap.v, in_width, in_height, s->ih_flip, s->iv_flip);
+ av_assert1(!isnan(du) && !isnan(dv));
+ s->calculate_kernel(du, dv, &rmap, u, v, ker);
+
+ if (!p && r->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;
V360Context *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
const int depth = desc->comp[0].depth;
- float remap_data_size = 0.f;
- int sizeof_remap;
+ const int sizeof_mask = s->mask_size = (depth + 7) >> 3;
+ float default_h_fov = 360.f;
+ float default_v_fov = 180.f;
+ float default_ih_fov = 360.f;
+ float default_iv_fov = 180.f;
+ int sizeof_uv;
+ int sizeof_ker;
int err;
- int p, h, w;
+ int h, w;
+ int in_offset_h, in_offset_w;
+ int out_offset_h, out_offset_w;
float hf, wf;
- float mirror_modifier[3];
- void (*in_transform)(const V360Context *s,
- const float *vec, int width, int height,
- uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv);
- void (*out_transform)(const V360Context *s,
- int i, int j, int width, int height,
- float *vec);
- void (*calculate_kernel)(float du, float dv, int shift, const XYRemap4 *r_tmp, void *r);
- float rot_mat[3][3];
+ int (*prepare_out)(AVFilterContext *ctx);
+ int have_alpha;
+
+ s->max_value = (1 << depth) - 1;
switch (s->interp) {
case NEAREST:
- calculate_kernel = nearest_kernel;
+ s->calculate_kernel = nearest_kernel;
s->remap_slice = depth <= 8 ? remap1_8bit_slice : remap1_16bit_slice;
- sizeof_remap = sizeof(XYRemap1);
+ s->elements = 1;
+ sizeof_uv = sizeof(int16_t) * s->elements;
+ sizeof_ker = 0;
break;
case BILINEAR:
- calculate_kernel = bilinear_kernel;
+ s->calculate_kernel = bilinear_kernel;
s->remap_slice = depth <= 8 ? remap2_8bit_slice : remap2_16bit_slice;
- sizeof_remap = sizeof(XYRemap2);
+ 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:
- calculate_kernel = bicubic_kernel;
+ s->calculate_kernel = bicubic_kernel;
s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice;
- sizeof_remap = sizeof(XYRemap4);
+ s->elements = 4 * 4;
+ sizeof_uv = sizeof(int16_t) * s->elements;
+ sizeof_ker = sizeof(int16_t) * s->elements;
break;
case LANCZOS:
- calculate_kernel = lanczos_kernel;
+ 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;
+ case MITCHELL:
+ s->calculate_kernel = mitchell_kernel;
s->remap_slice = depth <= 8 ? remap4_8bit_slice : remap4_16bit_slice;
- sizeof_remap = sizeof(XYRemap4);
+ 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];
+
+ switch (s->in) {
+ case CYLINDRICAL:
+ case FLAT:
+ default_ih_fov = 90.f;
+ default_iv_fov = 45.f;
+ break;
+ case EQUISOLID:
+ case ORTHOGRAPHIC:
+ case STEREOGRAPHIC:
+ case DUAL_FISHEYE:
+ case FISHEYE:
+ default_ih_fov = 180.f;
+ default_iv_fov = 180.f;
+ default:
break;
}
+ if (s->ih_fov == 0.f)
+ s->ih_fov = default_ih_fov;
+
+ if (s->iv_fov == 0.f)
+ s->iv_fov = default_iv_fov;
+
+ 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:
- in_transform = xyz_to_equirect;
- err = 0;
- wf = inlink->w;
- hf = inlink->h;
+ s->in_transform = xyz_to_equirect;
+ err = prepare_equirect_in(ctx);
+ wf = w;
+ hf = h;
break;
case CUBEMAP_3_2:
- in_transform = xyz_to_cube3x2;
+ 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 = inlink->w / 3.f * 4.f;
- hf = inlink->h;
+ wf = w * 4.f;
+ hf = h / 3.f;
break;
case CUBEMAP_6_1:
- in_transform = xyz_to_cube6x1;
+ s->in_transform = xyz_to_cube6x1;
err = prepare_cube_in(ctx);
- wf = inlink->w / 3.f * 2.f;
- hf = inlink->h * 2.f;
+ wf = w / 3.f * 2.f;
+ hf = h * 2.f;
break;
case EQUIANGULAR:
- in_transform = xyz_to_eac;
+ s->in_transform = xyz_to_eac;
err = prepare_eac_in(ctx);
- wf = inlink->w;
- hf = inlink->h / 9.f * 8.f;
+ wf = w;
+ hf = h / 9.f * 8.f;
break;
case FLAT:
- av_log(ctx, AV_LOG_ERROR, "Flat format is not accepted as input.\n");
+ 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:
- in_transform = xyz_to_dfisheye;
+ s->in_transform = xyz_to_dfisheye;
+ err = prepare_fisheye_in(ctx);
+ 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;
+ case EQUISOLID:
+ s->in_transform = xyz_to_equisolid;
+ err = prepare_equisolid_in(ctx);
+ wf = w;
+ hf = h / 2.f;
+ break;
+ case ORTHOGRAPHIC:
+ s->in_transform = xyz_to_orthographic;
+ err = prepare_orthographic_in(ctx);
+ wf = w;
+ hf = h / 2.f;
+ break;
+ case OCTAHEDRON:
+ s->in_transform = xyz_to_octahedron;
err = 0;
- wf = inlink->w;
- hf = inlink->h;
+ wf = w;
+ hf = h / 2.f;
break;
default:
av_log(ctx, AV_LOG_ERROR, "Specified input format is not handled.\n");
switch (s->out) {
case EQUIRECTANGULAR:
- out_transform = equirect_to_xyz;
- err = 0;
- w = roundf(wf);
- h = roundf(hf);
+ s->out_transform = equirect_to_xyz;
+ prepare_out = prepare_equirect_out;
+ w = lrintf(wf);
+ h = lrintf(hf);
break;
case CUBEMAP_3_2:
- out_transform = cube3x2_to_xyz;
- err = prepare_cube_out(ctx);
- w = roundf(wf / 4.f * 3.f);
- h = roundf(hf);
+ 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:
- out_transform = cube6x1_to_xyz;
- err = prepare_cube_out(ctx);
- w = roundf(wf / 2.f * 3.f);
- h = roundf(hf / 2.f);
+ 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:
- out_transform = eac_to_xyz;
- err = prepare_eac_out(ctx);
- w = roundf(wf);
- h = roundf(hf / 8.f * 9.f);
+ s->out_transform = eac_to_xyz;
+ prepare_out = prepare_eac_out;
+ w = lrintf(wf);
+ h = lrintf(hf / 8.f * 9.f);
break;
case FLAT:
- out_transform = flat_to_xyz;
- err = prepare_flat_out(ctx);
- w = roundf(wf * s->flat_range[0] / s->flat_range[1] / 2.f);
- h = roundf(hf);
+ s->out_transform = flat_to_xyz;
+ prepare_out = prepare_flat_out;
+ w = lrintf(wf);
+ h = lrintf(hf);
break;
case DUAL_FISHEYE:
- av_log(ctx, AV_LOG_ERROR, "Dual fisheye format is not accepted as output.\n");
- return AVERROR(EINVAL);
+ s->out_transform = dfisheye_to_xyz;
+ prepare_out = prepare_fisheye_out;
+ 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;
+ case EQUISOLID:
+ s->out_transform = equisolid_to_xyz;
+ prepare_out = prepare_equisolid_out;
+ w = lrintf(wf);
+ h = lrintf(hf * 2.f);
+ break;
+ case ORTHOGRAPHIC:
+ s->out_transform = orthographic_to_xyz;
+ prepare_out = prepare_orthographic_out;
+ w = lrintf(wf);
+ h = lrintf(hf * 2.f);
+ break;
+ case OCTAHEDRON:
+ s->out_transform = octahedron_to_xyz;
+ prepare_out = NULL;
+ w = lrintf(wf);
+ h = lrintf(hf * 2.f);
+ break;
default:
av_log(ctx, AV_LOG_ERROR, "Specified output format is not handled.\n");
return AVERROR_BUG;
}
- if (err != 0) {
- return err;
- }
-
// Override resolution with user values if specified
- if (s->width > 0 && s->height > 0) {
+ 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;
+
+ switch (s->out) {
+ case CYLINDRICAL:
+ case FLAT:
+ default_h_fov = 90.f;
+ default_v_fov = 45.f;
+ break;
+ case EQUISOLID:
+ case ORTHOGRAPHIC:
+ case STEREOGRAPHIC:
+ case DUAL_FISHEYE:
+ case FISHEYE:
+ default_h_fov = 180.f;
+ default_v_fov = 180.f;
+ break;
+ default:
+ break;
+ }
+
+ if (s->h_fov == 0.f)
+ s->h_fov = default_h_fov;
+
+ if (s->v_fov == 0.f)
+ s->v_fov = default_v_fov;
+
+ 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);
}
- s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(h, desc->log2_chroma_h);
- s->planeheight[0] = s->planeheight[3] = h;
- s->planewidth[1] = s->planewidth[2] = FF_CEIL_RSHIFT(w, desc->log2_chroma_w);
- s->planewidth[0] = s->planewidth[3] = w;
+ 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->inplaneheight[1] = s->inplaneheight[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
- s->inplaneheight[0] = s->inplaneheight[3] = inlink->h;
- s->inplanewidth[1] = s->inplanewidth[2] = FF_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
- s->inplanewidth[0] = s->inplanewidth[3] = inlink->w;
+ s->nb_threads = FFMIN(outlink->h, ff_filter_get_nb_threads(ctx));
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
+ have_alpha = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA);
- for (p = 0; p < s->nb_planes; p++) {
- remap_data_size += (float)s->planewidth[p] * s->planeheight[p] * sizeof_remap;
+ 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 (p = 0; p < s->nb_planes; p++) {
- s->remap[p] = av_calloc(s->planewidth[p] * s->planeheight[p], sizeof_remap);
- if (!s->remap[p]) {
- av_log(ctx, AV_LOG_ERROR,
- "Not enough memory to allocate remap data. Need at least %.3f GiB.\n",
- remap_data_size / (1024 * 1024 * 1024));
- return AVERROR(ENOMEM);
- }
+ if (!s->slice_remap)
+ s->slice_remap = av_calloc(s->nb_threads, sizeof(*s->slice_remap));
+ if (!s->slice_remap)
+ return AVERROR(ENOMEM);
+
+ for (int i = 0; i < s->nb_allocated; i++) {
+ err = allocate_plane(s, sizeof_uv, sizeof_ker, sizeof_mask * have_alpha * s->alpha, i);
+ if (err < 0)
+ return err;
}
- calculate_rotation_matrix(s->yaw, s->pitch, s->roll, rot_mat);
- set_mirror_modifier(s->h_flip, s->v_flip, s->d_flip, mirror_modifier);
+ calculate_rotation(s->yaw, s->pitch, s->roll,
+ s->rot_quaternion, s->rotation_order);
- // Calculate remap data
- for (p = 0; p < s->nb_planes; p++) {
- const int width = s->planewidth[p];
- const int height = s->planeheight[p];
- const int in_width = s->inplanewidth[p];
- const int in_height = s->inplaneheight[p];
- void *r = s->remap[p];
- float du, dv;
- float vec[3];
- XYRemap4 r_tmp;
- int i, j;
-
- for (i = 0; i < width; i++) {
- for (j = 0; j < height; j++) {
- out_transform(s, i, j, width, height, vec);
- rotate(rot_mat, vec);
- mirror(mirror_modifier, vec);
- in_transform(s, vec, in_width, in_height, r_tmp.u, r_tmp.v, &du, &dv);
- calculate_kernel(du, dv, j * width + i, &r_tmp, r);
- }
- }
- }
+ set_mirror_modifier(s->h_flip, s->v_flip, s->d_flip, s->output_mirror_modifier);
+
+ ctx->internal->execute(ctx, v360_slice, NULL, NULL, s->nb_threads);
return 0;
}
}
av_frame_copy_props(out, in);
- td.s = s;
td.in = in;
td.out = out;
- td.nb_planes = s->nb_planes;
- ctx->internal->execute(ctx, s->remap_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
+ ctx->internal->execute(ctx, s->remap_slice, &td, NULL, s->nb_threads);
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)
+{
+ V360Context *s = ctx->priv;
+ int ret;
+
+ s->yaw = s->pitch = s->roll = 0.f;
+
+ 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 int init(AVFilterContext *ctx)
+{
+ V360Context *s = ctx->priv;
+
+ s->rot_quaternion[0][0] = 1.f;
+ s->rot_quaternion[0][1] = s->rot_quaternion[0][2] = s->rot_quaternion[0][3] = 0.f;
+
+ return 0;
+}
+
static av_cold void uninit(AVFilterContext *ctx)
{
V360Context *s = ctx->priv;
- int p;
- for (p = 0; p < s->nb_planes; p++)
- av_freep(&s->remap[p]);
+ for (int n = 0; n < s->nb_threads && s->slice_remap; n++) {
+ SliceXYRemap *r = &s->slice_remap[n];
+
+ for (int p = 0; p < s->nb_allocated; p++) {
+ av_freep(&r->u[p]);
+ av_freep(&r->v[p]);
+ av_freep(&r->ker[p]);
+ }
+
+ av_freep(&r->mask);
+ }
+
+ av_freep(&s->slice_remap);
}
static const AVFilterPad inputs[] = {
{ NULL }
};
-AVFilter ff_vf_v360 = {
+const AVFilter ff_vf_v360 = {
.name = "v360",
.description = NULL_IF_CONFIG_SMALL("Convert 360 projection of video."),
.priv_size = sizeof(V360Context),
+ .init = init,
.uninit = uninit,
.query_formats = query_formats,
.inputs = inputs,
.outputs = outputs,
.priv_class = &v360_class,
.flags = AVFILTER_FLAG_SLICE_THREADS,
+ .process_command = process_command,
};
projects / ffmpeg / blobdiff