scale_mapper.h

#pragma once
 
#include "model/scale/note_set.h"
#include "model/scale/scale_change.h"
#include "util/const_functions.h"
 
#include <cstdint>
 
#if IN_UNIT_TESTS
#include <iostream>
#endif
 
class ScaleMapper {
public:
    bool computeChangeFrom(NoteSet notes, NoteSet sourceScale, NoteSet targetScale, ScaleChange& changes);
 
private:
    NoteSet lastTransitionNotes;
    NoteSet transitionScaleStore[kMaxScaleSize];
    NoteSet initialTransitionScale(NoteSet sourceScale);
    void computeInitialChanges(NoteSet sourceScale, NoteSet initialScale, ScaleChange& changes);
    void flushTransitionScaleStore(NoteSet initialScale);
    void computeFinalChanges(NoteSet initialScale, NoteSet transitionScale, NoteSet targetScale, ScaleChange& changes);
    NoteSet nextTransitionScale(NoteSet notes, NoteSet transitionScale, NoteSet targetScale);
};