Function sinc

include/LabSound/core/WindowFunctions.h:63–66

namespace detail
{
    inline float sinc(const float x)
    {
        return (x == 0.0f) ? 1.0f : std::sin(x * static_cast<float>(LAB_PI)) / (x * static_cast<float>(LAB_PI));
    }

    inline float gen_cosine_1(const float max_index, const uint32_t idx, const float alpha, const float beta)
    {