76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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To use, copy, modify, and/or distribute this software for any purpose with or
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without fee is hereby granted provided that the above copyright notice and
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this permission notice appear in all copies.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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struct CatmullRomAlgorithm
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{
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static forcedinline float valueAtOffset (const float* const inputs, const float offset) noexcept
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{
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auto y0 = inputs[3];
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auto y1 = inputs[2];
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auto y2 = inputs[1];
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auto y3 = inputs[0];
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auto halfY0 = 0.5f * y0;
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auto halfY3 = 0.5f * y3;
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return y1 + offset * ((0.5f * y2 - halfY0)
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+ (offset * (((y0 + 2.0f * y2) - (halfY3 + 2.5f * y1))
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+ (offset * ((halfY3 + 1.5f * y1) - (halfY0 + 1.5f * y2))))));
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}
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};
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CatmullRomInterpolator::CatmullRomInterpolator() noexcept { reset(); }
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CatmullRomInterpolator::~CatmullRomInterpolator() noexcept {}
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void CatmullRomInterpolator::reset() noexcept
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{
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subSamplePos = 1.0;
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for (auto& s : lastInputSamples)
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s = 0;
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}
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int CatmullRomInterpolator::process (double actualRatio, const float* in, float* out, int numOut, int available, int wrap) noexcept
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{
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return interpolate<CatmullRomAlgorithm> (lastInputSamples, subSamplePos, actualRatio, in, out, numOut, available, wrap);
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}
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int CatmullRomInterpolator::process (double actualRatio, const float* in, float* out, int numOut) noexcept
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{
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return interpolate<CatmullRomAlgorithm> (lastInputSamples, subSamplePos, actualRatio, in, out, numOut);
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}
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int CatmullRomInterpolator::processAdding (double actualRatio, const float* in, float* out, int numOut, int available, int wrap, float gain) noexcept
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{
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return interpolateAdding<CatmullRomAlgorithm> (lastInputSamples, subSamplePos, actualRatio, in, out, numOut, available, wrap, gain);
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}
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int CatmullRomInterpolator::processAdding (double actualRatio, const float* in, float* out, int numOut, float gain) noexcept
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{
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return interpolateAdding<CatmullRomAlgorithm> (lastInputSamples, subSamplePos, actualRatio, in, out, numOut, gain);
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}
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} // namespace juce
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