Chris Robinson
35 lines
1.0 KiB
C++
35 lines
1.0 KiB
C++
#ifndef FILTER_SPLITTER_H
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#define FILTER_SPLITTER_H
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#include <cstddef>
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/* Band splitter. Splits a signal into two phase-matching frequency bands. */
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template<typename Real>
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class BandSplitterR {
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Real mCoeff{0.0f};
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Real mLpZ1{0.0f};
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Real mLpZ2{0.0f};
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Real mApZ1{0.0f};
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public:
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BandSplitterR() = default;
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BandSplitterR(const BandSplitterR&) = default;
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BandSplitterR(Real f0norm) { init(f0norm); }
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void init(Real f0norm);
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void clear() noexcept { mLpZ1 = mLpZ2 = mApZ1 = 0.0f; }
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void process(Real *hpout, Real *lpout, const Real *input, const size_t count);
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void applyHfScale(Real *samples, const Real hfscale, const size_t count);
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/* The all-pass portion of the band splitter. Applies the same phase shift
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* without splitting the signal. Note that each use of this method is
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* indepedent, it does not track history between calls.
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*/
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void applyAllpass(Real *samples, const size_t count) const;
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};
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using BandSplitter = BandSplitterR<float>;
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#endif /* FILTER_SPLITTER_H */
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