{ "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" },
+ {"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" },
{ "output", "set output projection", OFFSET(out), AV_OPT_TYPE_INT, {.i64=CUBEMAP_3_2}, 0, NB_PROJECTIONS-1, FLAGS, "out" },
{ "e", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIRECTANGULAR}, 0, 0, FLAGS, "out" },
{ "equirect", "equirectangular", 0, AV_OPT_TYPE_CONST, {.i64=EQUIRECTANGULAR}, 0, 0, FLAGS, "out" },
{ "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" },
{ "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" },
{ "cubic", "bicubic interpolation", 0, AV_OPT_TYPE_CONST, {.i64=BICUBIC}, 0, 0, FLAGS, "interp" },
{ "lanc", "lanczos interpolation", 0, AV_OPT_TYPE_CONST, {.i64=LANCZOS}, 0, 0, FLAGS, "interp" },
{ "lanczos", "lanczos interpolation", 0, AV_OPT_TYPE_CONST, {.i64=LANCZOS}, 0, 0, FLAGS, "interp" },
+ { "sp16", "spline16 interpolation", 0, AV_OPT_TYPE_CONST, {.i64=SPLINE16}, 0, 0, FLAGS, "interp" },
+ { "spline16", "spline16 interpolation", 0, AV_OPT_TYPE_CONST, {.i64=SPLINE16}, 0, 0, FLAGS, "interp" },
+ { "gauss", "gaussian interpolation", 0, AV_OPT_TYPE_CONST, {.i64=GAUSSIAN}, 0, 0, FLAGS, "interp" },
+ { "gaussian", "gaussian interpolation", 0, AV_OPT_TYPE_CONST, {.i64=GAUSSIAN}, 0, 0, FLAGS, "interp" },
{ "w", "output width", OFFSET(width), AV_OPT_TYPE_INT, {.i64=0}, 0, INT16_MAX, FLAGS, "w"},
{ "h", "output height", OFFSET(height), AV_OPT_TYPE_INT, {.i64=0}, 0, INT16_MAX, FLAGS, "h"},
+ { "in_stereo", "input stereo format", OFFSET(in_stereo), AV_OPT_TYPE_INT, {.i64=STEREO_2D}, 0, NB_STEREO_FMTS-1, FLAGS, "stereo" },
+ {"out_stereo", "output stereo format", OFFSET(out_stereo), AV_OPT_TYPE_INT, {.i64=STEREO_2D}, 0, NB_STEREO_FMTS-1, FLAGS, "stereo" },
+ { "2d", "2d mono", 0, AV_OPT_TYPE_CONST, {.i64=STEREO_2D}, 0, 0, FLAGS, "stereo" },
+ { "sbs", "side by side", 0, AV_OPT_TYPE_CONST, {.i64=STEREO_SBS}, 0, 0, FLAGS, "stereo" },
+ { "tb", "top bottom", 0, AV_OPT_TYPE_CONST, {.i64=STEREO_TB}, 0, 0, FLAGS, "stereo" },
{ "in_forder", "input cubemap face order", OFFSET(in_forder), AV_OPT_TYPE_STRING, {.str="rludfb"}, 0, NB_DIRECTIONS-1, FLAGS, "in_forder"},
{"out_forder", "output cubemap face order", OFFSET(out_forder), AV_OPT_TYPE_STRING, {.str="rludfb"}, 0, NB_DIRECTIONS-1, FLAGS, "out_forder"},
{ "in_frot", "input cubemap face rotation", OFFSET(in_frot), AV_OPT_TYPE_STRING, {.str="000000"}, 0, NB_DIRECTIONS-1, FLAGS, "in_frot"},
{ "out_frot", "output cubemap face rotation",OFFSET(out_frot), AV_OPT_TYPE_STRING, {.str="000000"}, 0, NB_DIRECTIONS-1, FLAGS, "out_frot"},
- { "in_pad", "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"},
+ { "in_pad", "percent input cubemap pads", OFFSET(in_pad), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 1.f, FLAGS, "in_pad"},
+ { "out_pad", "percent output cubemap pads", OFFSET(out_pad), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 1.f, FLAGS, "out_pad"},
+ { "fin_pad", "fixed input cubemap pads", OFFSET(fin_pad), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS, "fin_pad"},
+ { "fout_pad", "fixed output cubemap pads", OFFSET(fout_pad), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS, "fout_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"},
{ "iv_flip", "flip in video vertically", OFFSET(iv_flip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "iv_flip"},
{ "in_trans", "transpose video input", OFFSET(in_transpose), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "in_transpose"},
{ "out_trans", "transpose video output", OFFSET(out_transpose), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS, "out_transpose"},
+ { "ih_fov", "input horizontal field of view",OFFSET(ih_fov), AV_OPT_TYPE_FLOAT, {.dbl=90.f}, 0.00001f, 360.f, FLAGS, "ih_fov"},
+ { "iv_fov", "input vertical field of view", OFFSET(iv_fov), AV_OPT_TYPE_FLOAT, {.dbl=45.f}, 0.00001f, 360.f, FLAGS, "iv_fov"},
+ { "id_fov", "input diagonal field of view", OFFSET(id_fov), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, 0.f, 360.f, FLAGS, "id_fov"},
{ NULL }
};
return ff_set_common_formats(ctx, fmts_list);
}
-#define DEFINE_REMAP1_LINE(bits, div) \
-static void remap1_##bits##bit_line_c(uint8_t *dst, int width, const uint8_t *src, \
- ptrdiff_t in_linesize, \
- const uint16_t *u, const uint16_t *v, const int16_t *ker) \
-{ \
- const uint##bits##_t *s = (const uint##bits##_t *)src; \
- uint##bits##_t *d = (uint##bits##_t *)dst; \
- \
- in_linesize /= div; \
- \
- for (int x = 0; x < width; x++) \
- d[x] = s[v[x] * in_linesize + u[x]]; \
+#define DEFINE_REMAP1_LINE(bits, div) \
+static void remap1_##bits##bit_line_c(uint8_t *dst, int width, const uint8_t *const src, \
+ ptrdiff_t in_linesize, \
+ const int16_t *const u, const int16_t *const v, \
+ const int16_t *const ker) \
+{ \
+ const uint##bits##_t *const s = (const uint##bits##_t *const)src; \
+ uint##bits##_t *d = (uint##bits##_t *)dst; \
+ \
+ in_linesize /= div; \
+ \
+ for (int x = 0; x < width; x++) \
+ d[x] = s[v[x] * in_linesize + u[x]]; \
}
DEFINE_REMAP1_LINE( 8, 1)
DEFINE_REMAP1_LINE(16, 2)
-typedef struct XYRemap {
- uint16_t u[4][4];
- uint16_t v[4][4];
- float ker[4][4];
-} XYRemap;
-
/**
* Generate remapping function with a given window size and pixel depth.
*
#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; \
+ ThreadData *td = arg; \
const V360Context *s = ctx->priv; \
const AVFrame *in = td->in; \
AVFrame *out = td->out; \
\
- for (int plane = 0; plane < s->nb_planes; plane++) { \
- const int in_linesize = in->linesize[plane]; \
- const int out_linesize = out->linesize[plane]; \
- const int uv_linesize = s->uv_linesize[plane]; \
- const uint8_t *src = in->data[plane]; \
- uint8_t *dst = out->data[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 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 (int y = slice_start; y < slice_end; y++) { \
- const unsigned map = s->map[plane]; \
- const uint16_t *u = s->u[map] + y * uv_linesize * ws * ws; \
- const uint16_t *v = s->v[map] + y * uv_linesize * ws * ws; \
- const int16_t *ker = s->ker[map] + y * uv_linesize * ws * ws; \
+ for (int y = slice_start; y < slice_end; y++) { \
+ const int16_t *const u = s->u[map] + y * uv_linesize * ws * ws; \
+ const int16_t *const v = s->v[map] + y * uv_linesize * ws * ws; \
+ const int16_t *const ker = s->ker[map] + y * uv_linesize * ws * ws; \
\
- s->remap_line(dst + y * out_linesize, width, src, in_linesize, u, v, ker); \
+ s->remap_line(dst + y * out_linesize, width, src, in_linesize, u, v, ker); \
+ } \
} \
} \
\
DEFINE_REMAP(2, 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 *src, \
- ptrdiff_t in_linesize, \
- const uint16_t *u, const uint16_t *v, const int16_t *ker) \
-{ \
- const uint##bits##_t *s = (const uint##bits##_t *)src; \
- uint##bits##_t *d = (uint##bits##_t *)dst; \
- \
- in_linesize /= div; \
- \
- for (int x = 0; x < width; x++) { \
- const uint16_t *uu = u + x * ws * ws; \
- const uint16_t *vv = v + x * ws * ws; \
- const int16_t *kker = ker + x * ws * ws; \
- int tmp = 0; \
- \
- for (int i = 0; i < ws; i++) { \
- for (int j = 0; j < ws; j++) { \
- tmp += kker[i * ws + j] * s[vv[i * ws + j] * in_linesize + uu[i * ws + j]]; \
- } \
- } \
- \
- d[x] = av_clip_uint##bits(tmp >> 14); \
- } \
+#define DEFINE_REMAP_LINE(ws, bits, div) \
+static void remap##ws##_##bits##bit_line_c(uint8_t *dst, int width, const uint8_t *const src, \
+ ptrdiff_t in_linesize, \
+ const int16_t *const u, const int16_t *const v, \
+ const int16_t *const ker) \
+{ \
+ const uint##bits##_t *const s = (const uint##bits##_t *const)src; \
+ uint##bits##_t *d = (uint##bits##_t *)dst; \
+ \
+ in_linesize /= div; \
+ \
+ for (int x = 0; x < width; x++) { \
+ const int16_t *const uu = u + x * ws * ws; \
+ const int16_t *const vv = v + x * ws * ws; \
+ const int16_t *const kker = ker + x * ws * ws; \
+ int tmp = 0; \
+ \
+ for (int i = 0; i < ws; i++) { \
+ for (int j = 0; j < ws; j++) { \
+ tmp += kker[i * ws + j] * s[vv[i * ws + j] * in_linesize + uu[i * ws + j]]; \
+ } \
+ } \
+ \
+ d[x] = av_clip_uint##bits(tmp >> 14); \
+ } \
}
DEFINE_REMAP_LINE(2, 8, 1)
break;
case BICUBIC:
case LANCZOS:
+ case SPLINE16:
+ case GAUSSIAN:
s->remap_line = depth <= 8 ? remap4_8bit_line_c : remap4_16bit_line_c;
break;
}
*
* @param du horizontal relative coordinate
* @param dv vertical relative coordinate
- * @param r_tmp calculated 4x4 window
+ * @param rmap calculated 4x4 window
* @param u u remap data
* @param v v remap data
* @param ker ker remap data
*/
-static void nearest_kernel(float du, float dv, const XYRemap *r_tmp,
- uint16_t *u, uint16_t *v, int16_t *ker)
+static void nearest_kernel(float du, float dv, const XYRemap *rmap,
+ int16_t *u, int16_t *v, int16_t *ker)
{
- const int i = roundf(dv) + 1;
- const int j = roundf(du) + 1;
+ const int i = lrintf(dv) + 1;
+ const int j = lrintf(du) + 1;
- u[0] = r_tmp->u[i][j];
- v[0] = 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 r_tmp calculated 4x4 window
+ * @param rmap calculated 4x4 window
* @param u u remap data
* @param v v remap data
* @param ker ker remap data
*/
-static void bilinear_kernel(float du, float dv, const XYRemap *r_tmp,
- uint16_t *u, uint16_t *v, int16_t *ker)
+static void bilinear_kernel(float du, float dv, const XYRemap *rmap,
+ int16_t *u, int16_t *v, int16_t *ker)
{
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 2; j++) {
- u[i * 2 + j] = r_tmp->u[i + 1][j + 1];
- v[i * 2 + j] = r_tmp->v[i + 1][j + 1];
+ u[i * 2 + j] = rmap->u[i + 1][j + 1];
+ v[i * 2 + j] = rmap->v[i + 1][j + 1];
}
}
- ker[0] = (1.f - du) * (1.f - dv) * 16384;
- ker[1] = du * (1.f - dv) * 16384;
- ker[2] = (1.f - du) * dv * 16384;
- ker[3] = du * dv * 16384;
+ 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);
}
/**
*
* @param du horizontal relative coordinate
* @param dv vertical relative coordinate
- * @param r_tmp calculated 4x4 window
+ * @param rmap calculated 4x4 window
* @param u u remap data
* @param v v remap data
* @param ker ker remap data
*/
-static void bicubic_kernel(float du, float dv, const XYRemap *r_tmp,
- uint16_t *u, uint16_t *v, int16_t *ker)
+static void bicubic_kernel(float du, float dv, const XYRemap *rmap,
+ int16_t *u, int16_t *v, int16_t *ker)
{
float du_coeffs[4];
float dv_coeffs[4];
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
- u[i * 4 + j] = r_tmp->u[i][j];
- v[i * 4 + j] = r_tmp->v[i][j];
- ker[i * 4 + j] = du_coeffs[j] * dv_coeffs[i] * 16384;
+ 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);
}
}
}
*
* @param du horizontal relative coordinate
* @param dv vertical relative coordinate
- * @param r_tmp calculated 4x4 window
+ * @param rmap calculated 4x4 window
* @param u u remap data
* @param v v remap data
* @param ker ker remap data
*/
-static void lanczos_kernel(float du, float dv, const XYRemap *r_tmp,
- uint16_t *u, uint16_t *v, int16_t *ker)
+static void lanczos_kernel(float du, float dv, const XYRemap *rmap,
+ int16_t *u, int16_t *v, int16_t *ker)
{
float du_coeffs[4];
float dv_coeffs[4];
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
- u[i * 4 + j] = r_tmp->u[i][j];
- v[i * 4 + j] = r_tmp->v[i][j];
- ker[i * 4 + j] = du_coeffs[j] * dv_coeffs[i] * 16384;
+ 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 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 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]);
l_y = -vf;
l_z = 1.f;
break;
+ default:
+ av_assert0(0);
}
vec[0] = l_x;
* 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)
* 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
/**
* Calculate 3D coordinates on sphere for corresponding frame position in cubemap3x2 format.
*
- * @param s 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
int i, int j, int width, int height,
float *vec)
{
+ const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (s->out_width / 3.f) : 1.f - s->out_pad;
+ const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (s->out_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);
+ cube_to_xyz(s, uf, vf, face, vec, scalew, scaleh);
}
/**
* 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
*/
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)
+ 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 / (s->in_width / 3.f) : 1.f - s->in_pad;
+ const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (s->in_height / 2.f) : 1.f - s->in_pad;
const float ew = width / 3.f;
const float eh = height / 2.f;
float uf, vf;
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);
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;
/**
* Calculate 3D coordinates on sphere for corresponding frame position in cubemap1x6 format.
*
- * @param s 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
int i, int j, int width, int height,
float *vec)
{
+ const float scalew = s->fout_pad > 0 ? 1.f - (float)(s->fout_pad) / s->out_width : 1.f - s->out_pad;
+ const float scaleh = s->fout_pad > 0 ? 1.f - s->fout_pad / (s->out_height / 6.f) : 1.f - s->out_pad;
+
const float ew = width;
const float eh = height / 6.f;
const int v_shift = ceilf(eh * face);
const int ehi = ceilf(eh * (face + 1)) - v_shift;
- const float uf = 2.f * i / ew - 1.f;
- const float vf = 2.f * (j - v_shift) / ehi - 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);
}
/**
* Calculate 3D coordinates on sphere for corresponding frame position in cubemap6x1 format.
*
- * @param s 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
int i, int j, int width, int height,
float *vec)
{
+ const float scalew = s->fout_pad > 0 ? 1.f - s->fout_pad / (s->out_width / 6.f) : 1.f - s->out_pad;
+ const float scaleh = s->fout_pad > 0 ? 1.f - (float)(s->fout_pad) / s->out_height : 1.f - s->out_pad;
+
const float ew = width / 6.f;
const float eh = height;
const int u_shift = ceilf(ew * face);
const int ewi = ceilf(ew * (face + 1)) - u_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 - 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);
+ cube_to_xyz(s, uf, vf, face, vec, scalew, scaleh);
}
/**
* Calculate frame position in cubemap1x6 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
*/
static void xyz_to_cube1x6(const V360Context *s,
const float *vec, int width, int height,
- uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv)
+ 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) / s->in_width : 1.f - s->in_pad;
+ const float scaleh = s->fin_pad > 0 ? 1.f - s->fin_pad / (s->in_height / 6.f) : 1.f - s->in_pad;
const float eh = height / 6.f;
const int ewi = width;
float uf, vf;
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];
ehi = ceilf(eh * (face + 1)) - ceilf(eh * 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);
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;
v_shift = ceilf(eh * face);
new_ehi = ceilf(eh * (face + 1)) - v_shift;
- new_ui = av_clip(roundf(0.5f * ewi * (uf + 1.f)), 0, 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 * 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 + 1][j + 1] = new_ui;
/**
* Calculate frame position in cubemap6x1 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
*/
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)
+ 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 / (s->in_width / 6.f) : 1.f - s->in_pad;
+ const float scaleh = s->fin_pad > 0 ? 1.f - (float)(s->fin_pad) / s->in_height : 1.f - s->in_pad;
const float ew = width / 6.f;
const int ehi = height;
float uf, vf;
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);
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;
/**
* Calculate 3D coordinates on sphere for corresponding frame position in equirectangular format.
*
- * @param s 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
{
V360Context *s = ctx->priv;
- const float h_angle = tanf(FFMIN(s->h_fov, 359.f) * M_PI / 720.f);
- const float v_angle = tanf(FFMIN(s->v_fov, 359.f) * M_PI / 720.f);
-
- s->flat_range[0] = h_angle;
- s->flat_range[1] = v_angle;
+ s->flat_range[0] = tanf(FFMIN(s->h_fov, 359.f) * M_PI / 720.f);
+ s->flat_range[1] = tanf(FFMIN(s->v_fov, 359.f) * M_PI / 720.f);
return 0;
}
/**
* Calculate 3D coordinates on sphere for corresponding frame position in stereographic format.
*
- * @param s filter 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
normalize_vector(vec);
}
+/**
+ * Prepare data for processing stereographic input format.
+ *
+ * @param ctx filter context
+ *
+ * @return error code
+ */
+static int prepare_stereographic_in(AVFilterContext *ctx)
+{
+ V360Context *s = ctx->priv;
+
+ s->iflat_range[0] = tanf(FFMIN(s->ih_fov, 359.f) * M_PI / 720.f);
+ s->iflat_range[1] = tanf(FFMIN(s->iv_fov, 359.f) * M_PI / 720.f);
+
+ return 0;
+}
+
/**
* Calculate frame position in stereographic format for corresponding 3D coordinates on sphere.
*
- * @param s filter context
+ * @param s filter private context
* @param vec coordinates on sphere
* @param width frame width
* @param height frame height
*/
static void xyz_to_stereographic(const V360Context *s,
const float *vec, int width, int height,
- uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv)
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
{
- const float x = av_clipf(vec[0] / (1.f - vec[1]), -1.f, 1.f) * s->input_mirror_modifier[0];
- const float y = av_clipf(vec[2] / (1.f - vec[1]), -1.f, 1.f) * s->input_mirror_modifier[1];
+ const float x = vec[0] / (1.f - vec[1]) / s->iflat_range[0] * s->input_mirror_modifier[0];
+ const float y = vec[2] / (1.f - vec[1]) / s->iflat_range[1] * s->input_mirror_modifier[1];
float uf, vf;
- int ui, vi;
+ int visible, ui, vi;
uf = (x + 1.f) * width / 2.f;
vf = (y + 1.f) * height / 2.f;
ui = floorf(uf);
vi = floorf(vf);
- *du = uf - ui;
- *dv = vf - vi;
+ 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 = -1; i < 3; i++) {
for (int 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);
+ us[i + 1][j + 1] = visible ? av_clip(ui + j, 0, width - 1) : 0;
+ vs[i + 1][j + 1] = visible ? av_clip(vi + i, 0, height - 1) : 0;
}
}
}
/**
* Calculate frame position in equirectangular 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
*/
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)
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
{
const float phi = atan2f(vec[0], -vec[2]) * s->input_mirror_modifier[0];
const float theta = asinf(-vec[1]) * s->input_mirror_modifier[1];
}
/**
- * Prepare data for processing equi-angular cubemap input format.
+ * Prepare data for processing flat input format.
*
* @param ctx filter context
-
+ *
* @return error code
*/
-static int prepare_eac_in(AVFilterContext *ctx)
+static int prepare_flat_in(AVFilterContext *ctx)
{
V360Context *s = ctx->priv;
- if (s->ih_flip && s->iv_flip) {
- s->in_cubemap_face_order[RIGHT] = BOTTOM_LEFT;
- s->in_cubemap_face_order[LEFT] = BOTTOM_RIGHT;
- s->in_cubemap_face_order[UP] = TOP_LEFT;
- s->in_cubemap_face_order[DOWN] = TOP_RIGHT;
- s->in_cubemap_face_order[FRONT] = BOTTOM_MIDDLE;
- s->in_cubemap_face_order[BACK] = TOP_MIDDLE;
- } else if (s->ih_flip) {
- s->in_cubemap_face_order[RIGHT] = TOP_LEFT;
- s->in_cubemap_face_order[LEFT] = TOP_RIGHT;
- s->in_cubemap_face_order[UP] = BOTTOM_LEFT;
- s->in_cubemap_face_order[DOWN] = BOTTOM_RIGHT;
- s->in_cubemap_face_order[FRONT] = TOP_MIDDLE;
- s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE;
- } else if (s->iv_flip) {
- s->in_cubemap_face_order[RIGHT] = BOTTOM_RIGHT;
- s->in_cubemap_face_order[LEFT] = BOTTOM_LEFT;
- s->in_cubemap_face_order[UP] = TOP_RIGHT;
- s->in_cubemap_face_order[DOWN] = TOP_LEFT;
- s->in_cubemap_face_order[FRONT] = BOTTOM_MIDDLE;
- s->in_cubemap_face_order[BACK] = TOP_MIDDLE;
- } else {
- s->in_cubemap_face_order[RIGHT] = TOP_RIGHT;
- s->in_cubemap_face_order[LEFT] = TOP_LEFT;
- s->in_cubemap_face_order[UP] = BOTTOM_RIGHT;
- s->in_cubemap_face_order[DOWN] = BOTTOM_LEFT;
- s->in_cubemap_face_order[FRONT] = TOP_MIDDLE;
- s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE;
- }
-
- if (s->iv_flip) {
- s->in_cubemap_face_rotation[TOP_LEFT] = ROT_270;
- s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_90;
- s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_270;
- s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_0;
- s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_0;
- s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_0;
- } else {
- s->in_cubemap_face_rotation[TOP_LEFT] = ROT_0;
- s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_0;
- s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_0;
- s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_270;
- s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_90;
- s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_270;
- }
+ 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;
}
/**
- * Prepare data for processing equi-angular cubemap output format.
+ * Calculate frame position in flat format for corresponding 3D coordinates on sphere.
*
- * @param ctx filter context
+ * @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_flat(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
+{
+ const float theta = acosf(vec[2]);
+ const float r = tanf(theta);
+ const float rr = fabsf(r) < 1e+6f ? r : hypotf(width, height);
+ const float zf = -vec[2];
+ const float h = hypotf(vec[0], vec[1]);
+ const float c = h <= 1e-6f ? 1.f : rr / h;
+ float uf = -vec[0] * c / s->iflat_range[0] * s->input_mirror_modifier[0];
+ float vf = vec[1] * c / s->iflat_range[1] * s->input_mirror_modifier[1];
+ int visible, ui, vi;
+
+ uf = zf >= 0.f ? (uf + 1.f) * width / 2.f : 0.f;
+ vf = zf >= 0.f ? (vf + 1.f) * height / 2.f : 0.f;
+
+ ui = floorf(uf);
+ vi = floorf(vf);
+
+ visible = vi >= 0 && vi < height && ui >= 0 && ui < width;
+
+ *du = uf - ui;
+ *dv = vf - vi;
+
+ for (int i = -1; i < 3; i++) {
+ for (int j = -1; j < 3; j++) {
+ us[i + 1][j + 1] = visible ? av_clip(ui + j, 0, width - 1) : 0;
+ vs[i + 1][j + 1] = visible ? av_clip(vi + i, 0, height - 1) : 0;
+ }
+ }
+}
+
+/**
+ * Calculate frame position in mercator format for corresponding 3D coordinates on sphere.
*
- * @return error code
+ * @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 prepare_eac_out(AVFilterContext *ctx)
+static void xyz_to_mercator(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
{
- V360Context *s = ctx->priv;
+ const float phi = atan2f(vec[0], -vec[2]) * s->input_mirror_modifier[0];
+ const float theta = -vec[1] * s->input_mirror_modifier[1];
+ float uf, vf;
+ int ui, vi;
- 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;
+ uf = (phi / M_PI + 1.f) * width / 2.f;
+ vf = (av_clipf(logf((1.f + theta) / (1.f - theta)) / (2.f * M_PI), -1.f, 1.f) + 1.f) * height / 2.f;
+ ui = floorf(uf);
+ vi = floorf(vf);
- 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;
+ *du = uf - ui;
+ *dv = vf - vi;
- return 0;
+ for (int i = -1; i < 3; i++) {
+ for (int 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);
+ }
+ }
}
/**
- * Calculate 3D coordinates on sphere for corresponding frame position in equi-angular cubemap format.
+ * Calculate 3D coordinates on sphere for corresponding frame position in mercator format.
*
- * @param s 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 void eac_to_xyz(const V360Context *s,
- int i, int j, int width, int height,
- float *vec)
+static void mercator_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 phi = ((2.f * i) / width - 1.f) * M_PI + M_PI_2;
+ const float y = ((2.f * j) / height - 1.f) * M_PI;
+ const float div = expf(2.f * y) + 1.f;
- int u_face, v_face, face;
+ 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;
- float l_x, l_y, l_z;
+ vec[0] = sin_theta * cos_phi;
+ vec[1] = cos_theta;
+ vec[2] = sin_theta * sin_phi;
+}
- float uf = (float)i / width;
- float vf = (float)j / height;
+/**
+ * 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 void xyz_to_ball(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
+{
+ const float l = hypotf(vec[0], vec[1]);
+ const float r = sqrtf(1.f + vec[2]) / M_SQRT2;
+ float uf, vf;
+ int ui, vi;
- // 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
+ uf = (1.f + r * vec[0] * s->input_mirror_modifier[0] / (l > 0.f ? l : 1.f)) * width * 0.5f;
+ vf = (1.f - r * vec[1] * s->input_mirror_modifier[1] / (l > 0.f ? l : 1.f)) * height * 0.5f;
- // 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);
+ ui = floorf(uf);
+ vi = floorf(vf);
+
+ *du = uf - ui;
+ *dv = vf - vi;
+
+ for (int i = -1; i < 3; i++) {
+ for (int 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);
+ }
+ }
+}
+
+/**
+ * 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 void ball_to_xyz(const V360Context *s,
+ int i, int j, int width, int height,
+ float *vec)
+{
+ const float x = (2.f * i) / width - 1.f;
+ const float y = (2.f * j) / 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;
+ }
+}
+
+/**
+ * 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 void hammer_to_xyz(const V360Context *s,
+ int i, int j, int width, int height,
+ float *vec)
+{
+ const float x = ((2.f * i) / width - 1.f);
+ const float y = ((2.f * j) / 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);
+}
+
+/**
+ * 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 void xyz_to_hammer(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
+{
+ const float theta = atan2f(vec[0], -vec[2]) * s->input_mirror_modifier[0];
+
+ const float z = sqrtf(1.f + sqrtf(1.f - vec[1] * vec[1]) * cosf(theta * 0.5f));
+ const float x = sqrtf(1.f - vec[1] * vec[1]) * sinf(theta * 0.5f) / z;
+ const float y = -vec[1] / z * s->input_mirror_modifier[1];
+ float uf, vf;
+ int ui, vi;
+
+ uf = (x + 1.f) * width / 2.f;
+ vf = (y + 1.f) * height / 2.f;
+ ui = floorf(uf);
+ vi = floorf(vf);
+
+ *du = uf - ui;
+ *dv = vf - vi;
+
+ for (int i = -1; i < 3; i++) {
+ for (int 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);
+ }
+ }
+}
+
+/**
+ * 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 void sinusoidal_to_xyz(const V360Context *s,
+ int i, int j, int width, int height,
+ float *vec)
+{
+ const float theta = ((2.f * j) / height - 1.f) * M_PI_2;
+ const float phi = ((2.f * i) / 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);
+}
+
+/**
+ * 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 void xyz_to_sinusoidal(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
+{
+ const float theta = asinf(-vec[1]) * s->input_mirror_modifier[1];
+ const float phi = atan2f(vec[0], -vec[2]) * s->input_mirror_modifier[0] * cosf(theta);
+ float uf, vf;
+ int ui, vi;
+
+ 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);
+
+ *du = uf - ui;
+ *dv = vf - vi;
+
+ for (int i = -1; i < 3; i++) {
+ for (int 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);
+ }
+ }
+}
+
+/**
+ * Prepare data for processing equi-angular cubemap input format.
+ *
+ * @param ctx filter context
+ *
+ * @return error code
+ */
+static int prepare_eac_in(AVFilterContext *ctx)
+{
+ V360Context *s = ctx->priv;
+
+ if (s->ih_flip && s->iv_flip) {
+ s->in_cubemap_face_order[RIGHT] = BOTTOM_LEFT;
+ s->in_cubemap_face_order[LEFT] = BOTTOM_RIGHT;
+ s->in_cubemap_face_order[UP] = TOP_LEFT;
+ s->in_cubemap_face_order[DOWN] = TOP_RIGHT;
+ s->in_cubemap_face_order[FRONT] = BOTTOM_MIDDLE;
+ s->in_cubemap_face_order[BACK] = TOP_MIDDLE;
+ } else if (s->ih_flip) {
+ s->in_cubemap_face_order[RIGHT] = TOP_LEFT;
+ s->in_cubemap_face_order[LEFT] = TOP_RIGHT;
+ s->in_cubemap_face_order[UP] = BOTTOM_LEFT;
+ s->in_cubemap_face_order[DOWN] = BOTTOM_RIGHT;
+ s->in_cubemap_face_order[FRONT] = TOP_MIDDLE;
+ s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE;
+ } else if (s->iv_flip) {
+ s->in_cubemap_face_order[RIGHT] = BOTTOM_RIGHT;
+ s->in_cubemap_face_order[LEFT] = BOTTOM_LEFT;
+ s->in_cubemap_face_order[UP] = TOP_RIGHT;
+ s->in_cubemap_face_order[DOWN] = TOP_LEFT;
+ s->in_cubemap_face_order[FRONT] = BOTTOM_MIDDLE;
+ s->in_cubemap_face_order[BACK] = TOP_MIDDLE;
+ } else {
+ s->in_cubemap_face_order[RIGHT] = TOP_RIGHT;
+ s->in_cubemap_face_order[LEFT] = TOP_LEFT;
+ s->in_cubemap_face_order[UP] = BOTTOM_RIGHT;
+ s->in_cubemap_face_order[DOWN] = BOTTOM_LEFT;
+ s->in_cubemap_face_order[FRONT] = TOP_MIDDLE;
+ s->in_cubemap_face_order[BACK] = BOTTOM_MIDDLE;
+ }
+
+ if (s->iv_flip) {
+ s->in_cubemap_face_rotation[TOP_LEFT] = ROT_270;
+ s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_90;
+ s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_270;
+ s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_0;
+ s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_0;
+ s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_0;
+ } else {
+ s->in_cubemap_face_rotation[TOP_LEFT] = ROT_0;
+ s->in_cubemap_face_rotation[TOP_MIDDLE] = ROT_0;
+ s->in_cubemap_face_rotation[TOP_RIGHT] = ROT_0;
+ s->in_cubemap_face_rotation[BOTTOM_LEFT] = ROT_270;
+ s->in_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_90;
+ s->in_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_270;
+ }
+
+ return 0;
+}
+
+/**
+ * Prepare data for processing equi-angular cubemap output format.
+ *
+ * @param ctx filter context
+ *
+ * @return error code
+ */
+static int prepare_eac_out(AVFilterContext *ctx)
+{
+ V360Context *s = ctx->priv;
+
+ s->out_cubemap_direction_order[TOP_LEFT] = LEFT;
+ s->out_cubemap_direction_order[TOP_MIDDLE] = FRONT;
+ s->out_cubemap_direction_order[TOP_RIGHT] = RIGHT;
+ s->out_cubemap_direction_order[BOTTOM_LEFT] = DOWN;
+ s->out_cubemap_direction_order[BOTTOM_MIDDLE] = BACK;
+ s->out_cubemap_direction_order[BOTTOM_RIGHT] = UP;
+
+ s->out_cubemap_face_rotation[TOP_LEFT] = ROT_0;
+ s->out_cubemap_face_rotation[TOP_MIDDLE] = ROT_0;
+ s->out_cubemap_face_rotation[TOP_RIGHT] = ROT_0;
+ s->out_cubemap_face_rotation[BOTTOM_LEFT] = ROT_270;
+ s->out_cubemap_face_rotation[BOTTOM_MIDDLE] = ROT_90;
+ s->out_cubemap_face_rotation[BOTTOM_RIGHT] = ROT_270;
+
+ return 0;
+}
+
+/**
+ * Calculate 3D coordinates on sphere for corresponding frame position in equi-angular cubemap format.
+ *
+ * @param s filter private context
+ * @param i horizontal position on frame [0, width)
+ * @param j vertical position on frame [0, height)
+ * @param width frame width
+ * @param height frame height
+ * @param vec coordinates on sphere
+ */
+static void 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;
}
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);
- }
+ 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);
+}
+
+/**
+ * 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 void xyz_to_eac(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
+{
+ 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 = -1; i < 3; i++) {
+ for (int 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);
+ }
+ }
+}
+
+/**
+ * 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 void 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 / width - 1.f);
+ const float l_y = -s->flat_range[1] * (2.f * j / height - 1.f);
+
+ vec[0] = l_x;
+ vec[1] = l_y;
+ vec[2] = -1.f;
+
+ normalize_vector(vec);
+}
+
+/**
+ * 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 void 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) / height - 1.f);
+
+ const float phi = -atan2f(vf, uf);
+ const float theta = -M_PI_2 * (1.f - hypotf(uf, vf));
+
+ vec[0] = cosf(theta) * cosf(phi);
+ vec[1] = cosf(theta) * sinf(phi);
+ vec[2] = sinf(theta);
+
+ normalize_vector(vec);
+}
+
+/**
+ * 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 void xyz_to_fisheye(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
+{
+ const float phi = -atan2f(hypotf(vec[0], vec[1]), -vec[2]) / M_PI;
+ const float theta = -atan2f(vec[0], vec[1]);
+
+ float uf = sinf(theta) * phi * s->input_mirror_modifier[0] / s->iflat_range[0];
+ float vf = cosf(theta) * phi * s->input_mirror_modifier[1] / s->iflat_range[1];
+
+ const int visible = hypotf(uf, vf) <= 0.5f;
+ int ui, vi;
+
+ uf = (uf + 0.5f) * width;
+ vf = (vf + 0.5f) * height;
+
+ ui = floorf(uf);
+ vi = floorf(vf);
+
+ *du = visible ? uf - ui : 0.f;
+ *dv = visible ? vf - vi : 0.f;
+
+ for (int i = -1; i < 3; i++) {
+ for (int j = -1; j < 3; j++) {
+ us[i + 1][j + 1] = visible ? av_clip(ui + j, 0, width - 1) : 0;
+ vs[i + 1][j + 1] = visible ? av_clip(vi + i, 0, height - 1) : 0;
+ }
+ }
+}
+
+/**
+ * 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 void pannini_to_xyz(const V360Context *s,
+ int i, int j, int width, int height,
+ float *vec)
+{
+ const float uf = ((2.f * i) / width - 1.f);
+ const float vf = ((2.f * j) / 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 = -(M_PI + 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);
+}
+
+/**
+ * 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 void 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) / width - 1.f);
+ const float vf = s->flat_range[1] * ((2.f * j) / 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] = l_x;
- vec[1] = l_y;
- vec[2] = l_z;
+ vec[0] = cos_theta * sin_phi;
+ vec[1] = -sin_theta;
+ vec[2] = -cos_theta * cos_phi;
normalize_vector(vec);
}
/**
- * Calculate frame position in equi-angular cubemap format for corresponding 3D coordinates on sphere.
+ * 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 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_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 void xyz_to_cylindrical(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
{
- const float pixel_pad = 2;
- const float u_pad = pixel_pad / width;
- const float v_pad = pixel_pad / height;
-
+ const float phi = atan2f(vec[0], -vec[2]) * s->input_mirror_modifier[0] / s->iflat_range[0];
+ const float theta = atan2f(-vec[1], hypotf(vec[0], vec[2])) * s->input_mirror_modifier[1] / s->iflat_range[1];
+ int visible, ui, vi;
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 = (phi + 1.f) * (width - 1) / 2.f;
+ vf = (tanf(theta) + 1.f) * height / 2.f;
ui = floorf(uf);
vi = floorf(vf);
+ 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 = -1; i < 3; i++) {
for (int 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);
+ us[i + 1][j + 1] = visible ? av_clip(ui + j, 0, width - 1) : 0;
+ vs[i + 1][j + 1] = visible ? av_clip(vi + i, 0, height - 1) : 0;
}
}
}
/**
- * Prepare data for processing flat output format.
- *
- * @param ctx filter context
+ * Calculate 3D coordinates on sphere for corresponding frame position in perspective 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 void perspective_to_xyz(const V360Context *s,
+ int i, int j, int width, int height,
+ float *vec)
{
- V360Context *s = ctx->priv;
+ const float uf = ((2.f * i) / width - 1.f);
+ const float vf = ((2.f * j) / 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;
- 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;
+ if (sinz2 <= 1.f) {
+ const float cosz = sqrtf(1.f - sinz2);
- s->flat_range[0] = tanf(h_angle);
- s->flat_range[1] = tanf(v_angle);
- s->flat_range[2] = -1.f;
+ const float theta = asinf(cosz);
+ const float phi = atan2f(uf, vf);
- return 0;
+ const float sin_phi = sinf(phi);
+ const float cos_phi = cosf(phi);
+ const float sin_theta = sinf(theta);
+ const float cos_theta = cosf(theta);
+
+ vec[0] = cos_theta * sin_phi;
+ vec[1] = sin_theta;
+ vec[2] = -cos_theta * cos_phi;
+ } else {
+ vec[0] = 0.f;
+ vec[1] = -1.f;
+ vec[2] = 0.f;
+ }
+
+ normalize_vector(vec);
}
/**
- * Calculate 3D coordinates on sphere for corresponding frame position in flat format.
+ * Calculate 3D coordinates on sphere for corresponding frame position in tetrahedron format.
*
- * @param s 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 void flat_to_xyz(const V360Context *s,
- int i, int j, int width, int height,
- float *vec)
+static void tetrahedron_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 uf = (float)i / width;
+ const float vf = (float)j / height;
- vec[0] = l_x;
- vec[1] = l_y;
- vec[2] = l_z;
+ 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);
}
+/**
+ * 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 void xyz_to_tetrahedron(const V360Context *s,
+ const float *vec, int width, int height,
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
+{
+ float d = 0.5f * (vec[0] * vec[0] + vec[1] * vec[1] + vec[2] * vec[2]);
+
+ const float d0 = (vec[0] * 0.5f + vec[1] * 0.5f + vec[2] *-0.5f) / d;
+ const float d1 = (vec[0] *-0.5f + vec[1] *-0.5f + vec[2] *-0.5f) / d;
+ const float d2 = (vec[0] * 0.5f + vec[1] *-0.5f + vec[2] * 0.5f) / d;
+ const float d3 = (vec[0] *-0.5f + vec[1] * 0.5f + vec[2] * 0.5f) / d;
+
+ float uf, vf, x, y, z;
+ int ui, vi;
+
+ d = FFMAX(d0, FFMAX3(d1, d2, d3));
+
+ 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 = -1; i < 3; i++) {
+ for (int 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);
+ }
+ }
+}
+
/**
* Calculate 3D coordinates on sphere for corresponding frame position in dual fisheye format.
*
- * @param s 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
const float uf = ((2.f * ei) / ew - 1.f) * scale;
const float vf = ((2.f * j) / eh - 1.f) * scale;
- const float phi = M_PI + atan2f(vf, uf * m);
- const float theta = m * M_PI_2 * (1.f - hypotf(uf, vf));
+ 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_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[0] = cos_theta * m * -uf / lh;
+ vec[1] = cos_theta * -vf / lh;
vec[2] = sin_theta;
normalize_vector(vec);
/**
* Calculate frame position in dual fisheye 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
*/
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)
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
{
const float scale = 1.f - s->in_pad;
const float ew = width / 2.f;
const float eh = height;
- const float phi = atan2f(-vec[1], -vec[0]) * s->input_mirror_modifier[0];
- const float theta = acosf(fabsf(vec[2])) / M_PI * s->input_mirror_modifier[1];
+ 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 * cosf(phi) * scale + 0.5f) * ew;
- float vf = (theta * sinf(phi) * scale + 0.5f) * eh;
+ float uf = (theta * (-vec[0] / lh) * s->input_mirror_modifier[0] * scale + 0.5f) * ew;
+ float vf = (theta * (-vec[1] / lh) * s->input_mirror_modifier[1] * scale + 0.5f) * eh;
int ui, vi;
int u_shift;
- if (vec[2] >= 0) {
+ if (vec[2] >= 0.f) {
u_shift = 0;
} else {
u_shift = ceilf(ew);
/**
* Calculate 3D coordinates on sphere for corresponding frame position in barrel facebook's format.
*
- * @param s 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
/**
* Calculate frame position in barrel facebook's 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
*/
static void xyz_to_barrel(const V360Context *s,
const float *vec, int width, int height,
- uint16_t us[4][4], uint16_t vs[4][4], float *du, float *dv)
+ int16_t us[4][4], int16_t vs[4][4], float *du, float *dv)
{
const float scale = 0.99f;
{
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
- float sum = 0;
+ float sum = 0.f;
for (int k = 0; k < 3; k++)
sum += a[i][k] * b[k][j];
static int allocate_plane(V360Context *s, int sizeof_uv, int sizeof_ker, int p)
{
- s->u[p] = av_calloc(s->uv_linesize[p] * s->planeheight[p], sizeof_uv);
- s->v[p] = av_calloc(s->uv_linesize[p] * s->planeheight[p], sizeof_uv);
+ s->u[p] = av_calloc(s->uv_linesize[p] * s->pr_height[p], sizeof_uv);
+ s->v[p] = av_calloc(s->uv_linesize[p] * s->pr_height[p], sizeof_uv);
if (!s->u[p] || !s->v[p])
return AVERROR(ENOMEM);
if (sizeof_ker) {
- s->ker[p] = av_calloc(s->uv_linesize[p] * s->planeheight[p], sizeof_ker);
+ s->ker[p] = av_calloc(s->uv_linesize[p] * s->pr_height[p], sizeof_ker);
if (!s->ker[p])
return AVERROR(ENOMEM);
}
return 0;
}
-static void fov_from_dfov(V360Context *s, float w, float h)
+static void fov_from_dfov(float d_fov, float w, float h, float *h_fov, float *v_fov)
{
- const float da = tanf(0.5 * FFMIN(s->d_fov, 359.f) * M_PI / 180.f);
+ const float da = tanf(0.5 * FFMIN(d_fov, 359.f) * M_PI / 180.f);
const float d = hypotf(w, h);
- s->h_fov = atan2f(da * w, d) * 360.f / M_PI;
- s->v_fov = atan2f(da * h, d) * 360.f / M_PI;
+ *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;
+}
+
+static void set_dimensions(int *outw, int *outh, int w, int h, const AVPixFmtDescriptor *desc)
+{
+ outw[1] = outw[2] = FF_CEIL_RSHIFT(w, desc->log2_chroma_w);
+ outw[0] = outw[3] = w;
+ outh[1] = outh[2] = FF_CEIL_RSHIFT(h, desc->log2_chroma_h);
+ outh[0] = outh[3] = h;
+}
+
+// Calculate remap data
+static av_always_inline int v360_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ V360Context *s = ctx->priv;
+
+ for (int p = 0; p < s->nb_allocated; p++) {
+ const int width = s->pr_width[p];
+ const int uv_linesize = s->uv_linesize[p];
+ const int height = s->pr_height[p];
+ const int in_width = s->inplanewidth[p];
+ const int in_height = s->inplaneheight[p];
+ const int slice_start = (height * jobnr ) / nb_jobs;
+ const int slice_end = (height * (jobnr + 1)) / nb_jobs;
+ float du, dv;
+ float vec[3];
+ XYRemap rmap;
+
+ for (int j = slice_start; j < slice_end; j++) {
+ for (int i = 0; i < width; i++) {
+ int16_t *u = s->u[p] + (j * uv_linesize + i) * s->elements;
+ int16_t *v = s->v[p] + (j * uv_linesize + i) * s->elements;
+ int16_t *ker = s->ker[p] + (j * uv_linesize + i) * s->elements;
+
+ if (s->out_transpose)
+ s->out_transform(s, j, i, height, width, vec);
+ else
+ s->out_transform(s, i, j, width, height, vec);
+ av_assert1(!isnan(vec[0]) && !isnan(vec[1]) && !isnan(vec[2]));
+ rotate(s->rot_mat, vec);
+ av_assert1(!isnan(vec[0]) && !isnan(vec[1]) && !isnan(vec[2]));
+ normalize_vector(vec);
+ mirror(s->output_mirror_modifier, vec);
+ if (s->in_transpose)
+ s->in_transform(s, vec, in_height, in_width, rmap.v, rmap.u, &du, &dv);
+ else
+ s->in_transform(s, vec, in_width, in_height, rmap.u, rmap.v, &du, &dv);
+ av_assert1(!isnan(du) && !isnan(dv));
+ s->calculate_kernel(du, dv, &rmap, u, v, ker);
+ }
+ }
+ }
- if (s->h_fov < 0.f)
- s->h_fov += 360.f;
- if (s->v_fov < 0.f)
- s->v_fov += 360.f;
+ return 0;
}
static int config_output(AVFilterLink *outlink)
const int depth = desc->comp[0].depth;
int sizeof_uv;
int sizeof_ker;
- int elements;
int err;
int h, w;
+ int in_offset_h, in_offset_w;
+ int out_offset_h, out_offset_w;
float hf, wf;
- float output_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, const XYRemap *r_tmp,
- uint16_t *u, uint16_t *v, int16_t *ker);
int (*prepare_out)(AVFilterContext *ctx);
- float rot_mat[3][3];
s->input_mirror_modifier[0] = s->ih_flip ? -1.f : 1.f;
s->input_mirror_modifier[1] = s->iv_flip ? -1.f : 1.f;
switch (s->interp) {
case NEAREST:
- calculate_kernel = nearest_kernel;
+ s->calculate_kernel = nearest_kernel;
s->remap_slice = depth <= 8 ? remap1_8bit_slice : remap1_16bit_slice;
- elements = 1;
- sizeof_uv = sizeof(uint16_t) * elements;
+ 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;
- elements = 2 * 2;
- sizeof_uv = sizeof(uint16_t) * elements;
- sizeof_ker = sizeof(uint16_t) * elements;
+ s->elements = 2 * 2;
+ 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;
- elements = 4 * 4;
- sizeof_uv = sizeof(uint16_t) * elements;
- sizeof_ker = sizeof(uint16_t) * elements;
+ 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;
- elements = 4 * 4;
- sizeof_uv = sizeof(uint16_t) * elements;
- sizeof_ker = sizeof(uint16_t) * elements;
+ s->elements = 4 * 4;
+ sizeof_uv = sizeof(int16_t) * s->elements;
+ sizeof_ker = sizeof(int16_t) * s->elements;
break;
default:
av_assert0(0);
s->rotation_order[order] = rorder;
}
+ switch (s->in_stereo) {
+ case STEREO_2D:
+ w = inlink->w;
+ h = inlink->h;
+ in_offset_w = in_offset_h = 0;
+ break;
+ case STEREO_SBS:
+ w = inlink->w / 2;
+ h = inlink->h;
+ in_offset_w = w;
+ in_offset_h = 0;
+ break;
+ case STEREO_TB:
+ w = inlink->w;
+ h = inlink->h / 2;
+ in_offset_w = 0;
+ in_offset_h = h;
+ break;
+ default:
+ av_assert0(0);
+ }
+
+ set_dimensions(s->inplanewidth, s->inplaneheight, w, h, desc);
+ set_dimensions(s->in_offset_w, s->in_offset_h, in_offset_w, in_offset_h, desc);
+
+ s->in_width = s->inplanewidth[0];
+ s->in_height = s->inplaneheight[0];
+
+ if (s->id_fov > 0.f)
+ fov_from_dfov(s->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;
+ s->in_transform = xyz_to_equirect;
err = 0;
- wf = inlink->w;
- hf = inlink->h;
+ 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 = inlink->w / 3.f * 4.f;
- hf = inlink->h;
+ wf = w / 3.f * 4.f;
+ hf = h;
break;
case CUBEMAP_1_6:
- in_transform = xyz_to_cube1x6;
+ s->in_transform = xyz_to_cube1x6;
err = prepare_cube_in(ctx);
- wf = inlink->w * 4.f;
- hf = inlink->h / 3.f;
+ 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:
+ case PANNINI:
+ 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 = 0;
- wf = inlink->w;
- hf = inlink->h;
+ wf = w;
+ hf = h;
break;
case BARREL:
- in_transform = xyz_to_barrel;
+ s->in_transform = xyz_to_barrel;
err = 0;
- wf = inlink->w / 5.f * 4.f;
- hf = inlink->h;
+ wf = w / 5.f * 4.f;
+ hf = h;
break;
case STEREOGRAPHIC:
- in_transform = xyz_to_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 = inlink->w;
- hf = inlink->h / 2.f;
+ 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 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;
default:
av_log(ctx, AV_LOG_ERROR, "Specified input format is not handled.\n");
switch (s->out) {
case EQUIRECTANGULAR:
- out_transform = equirect_to_xyz;
+ s->out_transform = equirect_to_xyz;
prepare_out = NULL;
- w = roundf(wf);
- h = roundf(hf);
+ w = lrintf(wf);
+ h = lrintf(hf);
break;
case CUBEMAP_3_2:
- out_transform = cube3x2_to_xyz;
+ s->out_transform = cube3x2_to_xyz;
prepare_out = prepare_cube_out;
- w = roundf(wf / 4.f * 3.f);
- h = roundf(hf);
+ w = lrintf(wf / 4.f * 3.f);
+ h = lrintf(hf);
break;
case CUBEMAP_1_6:
- out_transform = cube1x6_to_xyz;
+ s->out_transform = cube1x6_to_xyz;
prepare_out = prepare_cube_out;
- w = roundf(wf / 4.f);
- h = roundf(hf * 3.f);
+ w = lrintf(wf / 4.f);
+ h = lrintf(hf * 3.f);
break;
case CUBEMAP_6_1:
- out_transform = cube6x1_to_xyz;
+ s->out_transform = cube6x1_to_xyz;
prepare_out = prepare_cube_out;
- w = roundf(wf / 2.f * 3.f);
- h = roundf(hf / 2.f);
+ w = lrintf(wf / 2.f * 3.f);
+ h = lrintf(hf / 2.f);
break;
case EQUIANGULAR:
- out_transform = eac_to_xyz;
+ s->out_transform = eac_to_xyz;
prepare_out = prepare_eac_out;
- w = roundf(wf);
- h = roundf(hf / 8.f * 9.f);
+ w = lrintf(wf);
+ h = lrintf(hf / 8.f * 9.f);
break;
case FLAT:
- out_transform = flat_to_xyz;
+ s->out_transform = flat_to_xyz;
prepare_out = prepare_flat_out;
- w = roundf(wf);
- h = roundf(hf);
+ w = lrintf(wf);
+ h = lrintf(hf);
break;
case DUAL_FISHEYE:
- out_transform = dfisheye_to_xyz;
+ s->out_transform = dfisheye_to_xyz;
prepare_out = NULL;
- w = roundf(wf);
- h = roundf(hf);
+ w = lrintf(wf);
+ h = lrintf(hf);
break;
case BARREL:
- out_transform = barrel_to_xyz;
+ s->out_transform = barrel_to_xyz;
prepare_out = NULL;
- w = roundf(wf / 4.f * 5.f);
- h = roundf(hf);
+ w = lrintf(wf / 4.f * 5.f);
+ h = lrintf(hf);
break;
case STEREOGRAPHIC:
- out_transform = stereographic_to_xyz;
+ s->out_transform = stereographic_to_xyz;
prepare_out = prepare_stereographic_out;
- w = roundf(wf);
- h = roundf(hf * 2.f);
+ 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;
default:
av_log(ctx, AV_LOG_ERROR, "Specified output format is not handled.\n");
}
if (s->d_fov > 0.f)
- fov_from_dfov(s, w, h);
+ fov_from_dfov(s->d_fov, w, h, &s->h_fov, &s->v_fov);
if (prepare_out) {
err = prepare_out(ctx);
return err;
}
- 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->pr_width, s->pr_height, w, h, desc);
+
+ s->out_width = s->pr_width[0];
+ s->out_height = s->pr_height[0];
+
+ if (s->out_transpose)
+ FFSWAP(int, s->out_width, s->out_height);
+
+ switch (s->out_stereo) {
+ case STEREO_2D:
+ out_offset_w = out_offset_h = 0;
+ break;
+ case STEREO_SBS:
+ out_offset_w = w;
+ out_offset_h = 0;
+ w *= 2;
+ break;
+ case STEREO_TB:
+ out_offset_w = 0;
+ out_offset_h = h;
+ h *= 2;
+ break;
+ default:
+ av_assert0(0);
+ }
+
+ set_dimensions(s->out_offset_w, s->out_offset_h, out_offset_w, out_offset_h, desc);
+ set_dimensions(s->planewidth, s->planeheight, w, h, desc);
for (int i = 0; i < 4; i++)
- s->uv_linesize[i] = FFALIGN(s->planewidth[i], 8);
+ 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_planes = av_pix_fmt_count_planes(inlink->format);
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;
- allocate_plane(s, sizeof_uv, sizeof_ker, 0);
} else {
s->nb_allocated = 2;
- s->map[0] = 0;
+ s->map[0] = s->map[3] = 0;
s->map[1] = s->map[2] = 1;
- s->map[3] = 0;
- allocate_plane(s, sizeof_uv, sizeof_ker, 0);
- allocate_plane(s, sizeof_uv, sizeof_ker, 1);
}
- calculate_rotation_matrix(s->yaw, s->pitch, s->roll, rot_mat, s->rotation_order);
- set_mirror_modifier(s->h_flip, s->v_flip, s->d_flip, output_mirror_modifier);
-
- // Calculate remap data
- for (int p = 0; p < s->nb_allocated; p++) {
- const int width = s->planewidth[p];
- const int uv_linesize = s->uv_linesize[p];
- const int height = s->planeheight[p];
- const int in_width = s->inplanewidth[p];
- const int in_height = s->inplaneheight[p];
- float du, dv;
- float vec[3];
- XYRemap r_tmp;
+ for (int i = 0; i < s->nb_allocated; i++)
+ allocate_plane(s, sizeof_uv, sizeof_ker, i);
- for (int i = 0; i < width; i++) {
- for (int j = 0; j < height; j++) {
- uint16_t *u = s->u[p] + (j * uv_linesize + i) * elements;
- uint16_t *v = s->v[p] + (j * uv_linesize + i) * elements;
- int16_t *ker = s->ker[p] + (j * uv_linesize + i) * elements;
+ calculate_rotation_matrix(s->yaw, s->pitch, s->roll, s->rot_mat, s->rotation_order);
+ set_mirror_modifier(s->h_flip, s->v_flip, s->d_flip, s->output_mirror_modifier);
- if (s->out_transpose)
- out_transform(s, j, i, height, width, vec);
- else
- out_transform(s, i, j, width, height, vec);
- av_assert1(!isnan(vec[0]) && !isnan(vec[1]) && !isnan(vec[2]));
- rotate(rot_mat, vec);
- av_assert1(!isnan(vec[0]) && !isnan(vec[1]) && !isnan(vec[2]));
- normalize_vector(vec);
- mirror(output_mirror_modifier, vec);
- if (s->in_transpose)
- in_transform(s, vec, in_height, in_width, r_tmp.v, r_tmp.u, &du, &dv);
- else
- in_transform(s, vec, in_width, in_height, r_tmp.u, r_tmp.v, &du, &dv);
- av_assert1(!isnan(du) && !isnan(dv));
- calculate_kernel(du, dv, &r_tmp, u, v, ker);
- }
- }
- }
+ ctx->internal->execute(ctx, v360_slice, NULL, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
return 0;
}
projects / ffmpeg / blobdiff