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Miku AuahDark
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
#ifndef CORE_CUBIC_TABLES_H
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#define CORE_CUBIC_TABLES_H
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#include <array>
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#include <cstddef>
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#include "cubic_defs.h"
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struct CubicTable {
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std::array<CubicCoefficients,CubicPhaseCount> mTable{};
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};
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struct GaussianTable : CubicTable { GaussianTable(); };
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inline const GaussianTable gGaussianFilter;
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struct CubicFilter {
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static constexpr std::size_t sTableBits{8};
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static constexpr std::size_t sTableSteps{1 << sTableBits};
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static constexpr std::size_t sTableMask{sTableSteps - 1};
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std::array<float,sTableSteps*2 + 1> mFilter{};
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CubicFilter();
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[[nodiscard]] constexpr
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auto getCoeff0(std::size_t i) const noexcept -> float { return mFilter[sTableSteps+i]; }
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[[nodiscard]] constexpr
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auto getCoeff1(std::size_t i) const noexcept -> float { return mFilter[i]; }
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[[nodiscard]] constexpr
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auto getCoeff2(std::size_t i) const noexcept -> float { return mFilter[sTableSteps-i]; }
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[[nodiscard]] constexpr
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auto getCoeff3(std::size_t i) const noexcept -> float { return mFilter[sTableSteps*2-i]; }
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};
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inline const CubicFilter gCubicTable;
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#endif /* CORE_CUBIC_TABLES_H */
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