Function interpolate_cubic

dnn/src/x86/resize/resize_cv.cpp:1405–1412

        const DecimateAlpha* ytab, int ytab_size, const int* yofs);

static inline void interpolate_cubic(float x, float* coeffs) {
    const float A = -0.75f;

    coeffs[0] = ((A * (x + 1) - 5 * A) * (x + 1) + 8 * A) * (x + 1) - 4 * A;
    coeffs[1] = ((A + 2) * x - (A + 3)) * x * x + 1;
    coeffs[2] = ((A + 2) * (1 - x) - (A + 3)) * (1 - x) * (1 - x) + 1;
    coeffs[3] = 1.f - coeffs[0] - coeffs[1] - coeffs[2];
}
static inline void interpolate_lanczos4(float x, float* coeffs) {
    static const double s45 = 0.70710678118654752440084436210485;
    static const double cs[][2] = {{1, 0},  {-s45, -s45}, {0, 1},  {s45, -s45},