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/**
bespoke synth, a software modular synthesizer
Copyright (C) 2021 Ryan Challinor (contact: awwbees@gmail.com)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
**/
/*
==============================================================================
ChordDatabase.h
Created: 26 Mar 2018 9:54:44pm
Author: Ryan Challinor
==============================================================================
*/
#pragma once
#include <numeric>
#include <set>
#include <string>
#include <vector>
class ChordDatabase
{
public:
ChordDatabase();
std::string GetChordName(std::vector<int> pitches) const;
std::set<std::string> GetChordNamesAdvanced(const std::vector<int>& pitches, bool useScaleDegrees, bool showIntervals) const;
std::vector<int> GetChord(std::string name, int inversion) const;
std::vector<std::string> GetChordNames() const;
private:
struct ChordShape
{
ChordShape(std::string name, std::vector<int> elements, float rootPosBias = 0.0f)
{
std::vector<float> weights(12);
mName = name;
mElements = elements;
mWeights = weights;
mWeightSum = 0;
mRootPosBias = rootPosBias;
}
ChordShape(std::string name, std::vector<int> elements, std::vector<float> weights, float rootPosBias = 0.0f)
{
mName = name;
mElements = elements;
mWeights = weights;
auto lambda = [&](float a, float b)
{
return b > 0.0f ? a - b : a;
};
mWeightSum = std::accumulate(
mWeights.begin(), mWeights.end(), 0.0f, lambda);
mRootPosBias = rootPosBias;
}
std::string mName;
std::vector<int> mElements;
std::vector<float> mWeights;
float mWeightSum;
float mRootPosBias;
};
std::vector<ChordShape> mChordShapes;
std::string GetChordNameAdvanced(const std::vector<int>& pitches, const int root, const ChordShape shape, bool useScaleDegrees) const;
std::string NoteNameScaleRelative(int pitch, bool useDegrees) const; // Helper function for GetChordNameAdvanced, may be better off moved to synthglobals?
std::string ChordNameScaleRelative(int rootPitch) const; // Helper function for GetChordNameAdvanced, may be better off moved to synthglobals?
};
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