67 lines
2.5 KiB
C++
67 lines
2.5 KiB
C++
// Copyright (c) 2019, Paul Ferrand
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// All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include <optional>
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#include <string>
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#include <array>
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#include <cmath>
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#include "Helpers.h"
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namespace sfz
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{
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using CCValueArray = std::array<uint8_t, 128>;
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using CCValuePair = std::pair<uint8_t, float> ;
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using CCNamePair = std::pair<uint8_t, std::string>;
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template<class T>
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inline constexpr float centsFactor(T cents, T centsPerOctave = 1200)
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{
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return std::pow(2.0f, static_cast<float>(cents) / centsPerOctave);
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}
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template<class T>
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inline constexpr float normalizeCC(T ccValue)
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{
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static_assert(std::is_integral<T>::value);
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return static_cast<float>(std::min(std::max(ccValue, static_cast<T>(0)), static_cast<T>(127))) / 127.0f;
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}
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template<class T>
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inline constexpr float normalizePercents(T percentValue)
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{
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return std::min(std::max(static_cast<float>(percentValue), 0.0f), 100.0f) / 100.0f;
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}
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inline float ccSwitchedValue(const CCValueArray& ccValues, const std::optional<CCValuePair>& ccSwitch, float value) noexcept
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{
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if (ccSwitch)
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return value + ccSwitch->second * normalizeCC(ccValues[ccSwitch->first]);
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else
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return value;
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}
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std::optional<uint8_t> readNoteValue(const std::string_view& value);
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} // namespace sfz
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