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Scribbletune.cpp
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Scribbletune.cpp
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#include <iostream>
#include <vector>
#include <regex>
#include <map>
#include "Scribbletune.h"
using namespace std;
Scribbletune::Scribbletune() {
};
int Scribbletune::getPitchFromNote(string note) {
map<string,int> m;
m["a"] = 21;
m["b"] = 22;
m["c"] = 12;
m["d"] = 14;
m["e"] = 16;
m["f"] = 17;
m["g"] = 19;
return m[note];
}
string Scribbletune::getNoteFromPitch(int pitch, string accidental) {
map<int, string> m;
m[12] = "c";
m[13] = accidental == "#" ? "c#" : "db";
m[14] = "d";
m[15] = accidental == "#" ? "d#" : "eb";
m[16] = "e";
m[17] = "f";
m[18] = accidental == "#" ? "f#" : "gb";
m[19] = "g";
m[20] = accidental == "#" ? "g#" : "ab";
m[21] = "a";
m[22] = accidental == "#" ? "a#" : "bb";
m[23] = "b";
return m[pitch];
}
map<string,string> Scribbletune::getScales() {
map<string,string> m;
m["major pentatonic"] = "WWHW";
m["ionian pentatonic"] = "HHWH";
m["mixolydian pentatonic"] = "HHWH";
m["ritusen"] = "WHWW";
m["egyptian"] = "WHWH";
m["neopolitan major pentatonic"] = "HHHH";
m["vietnamese 1"] = "HWWH";
m["pelog"] = "HWHH";
m["kumoijoshi"] = "HHWH";
m["hirajoshi"] = "WHHH";
m["iwato"] = "HHHH";
m["in-sen"] = "HHWH";
m["lydian pentatonic"] = "HWHH";
m["malkos raga"] = "HWHW";
m["locrian pentatonic"] = "HWHH";
m["minor pentatonic"] = "HWWH";
m["minor six pentatonic"] = "HWWW";
m["flat three pentatonic"] = "WHHW";
m["flat six pentatonic"] = "WWHH";
m["scriabin"] = "HHHW";
m["whole tone pentatonic"] = "HWWW";
m["lydian #5P pentatonic"] = "HWWH";
m["lydian dominant pentatonic"] = "HWHH";
m["minor #7M pentatonic"] = "HWWH";
m["super locrian pentatonic"] = "HHWH";
m["minor hexatonic"] = "WHWWH";
m["augmented"] = "HHHHH";
m["major blues"] = "WHHHW";
m["piongio"] = "WHWWH";
m["prometheus neopolitan"] = "HHWHH";
m["prometheus"] = "WWWHH";
m["mystery #1"] = "HHWWW";
m["six tone symmetric"] = "HHHHH";
m["whole tone"] = "WWWWW";
m["messiaen's mode #5"] = "HHHHH";
m["minor blues"] = "HWHHH";
m["locrian major"] = "WWHHWW";
m["double harmonic lydian"] = "HHWHHH";
m["harmonic minor"] = "WHWWHH";
m["altered"] = "HWHWWW";
m["locrian #2"] = "WHWHWW";
m["mixolydian b6"] = "WWHWHW";
m["lydian dominant"] = "WWWHWH";
m["lydian"] = "WWWHWW";
m["lydian augmented"] = "WWWWHW";
m["dorian b2"] = "HWWWWH";
m["melodic minor"] = "WHWWWW";
m["locrian"] = "HWWHWW";
m["ultralocrian"] = "HWHWWH";
m["locrian 6"] = "HWWHHH";
m["augmented heptatonic"] = "HHHWHH";
m["romanian minor"] = "WHHHWH";
m["dorian #4"] = "WHHHWH";
m["lydian diminished"] = "WHHHWW";
m["phrygian"] = "HWWWHW";
m["leading whole tone"] = "WWWWWH";
m["lydian minor"] = "WWWHHW";
m["phrygian dominant"] = "HHHWHW";
m["balinese"] = "HWWWHH";
m["neopolitan major"] = "HWWWWW";
m["aeolian"] = "WHWWHW";
m["harmonic major"] = "WWHWHH";
m["double harmonic major"] = "HHHWHH";
m["dorian"] = "WHWWWH";
m["hungarian minor"] = "WHHHHH";
m["hungarian major"] = "HHWHWH";
m["oriental"] = "HHHHHH";
m["flamenco"] = "HWHWHH";
m["todi raga"] = "HWHHHH";
m["mixolydian"] = "WWHWWH";
m["persian"] = "HHHHWH";
m["major"] = "WWHWWW";
m["enigmatic"] = "HHWWWH";
m["major augmented"] = "WWHHHW";
m["lydian #9"] = "HHWHWW";
m["messiaen's mode #4"] = "HHHHHHH";
m["purvi raga"] = "HHHHHHH";
m["spanish heptatonic"] = "HWHHWHW";
m["bebop"] = "WWHWWHH";
m["bebop minor"] = "WHHHWWH";
m["bebop major"] = "WWHWHHW";
m["bebop locrian"] = "HWWHHHW";
m["minor bebop"] = "WHWWHWH";
m["diminished"] = "WHWHWHW";
m["ichikosucho"] = "WWHHHWW";
m["minor six diminished"] = "WHWWHHW";
m["half-whole diminished"] = "HWHWHWH";
m["kafi raga"] = "HHHWWHH";
m["messiaen's mode #6"] = "WWHHWWH";
m["composite blues"] = "WHHHHHWH";
m["messiaen's mode #3"] = "WHHWHHWH";
m["messiaen's mode #7"] = "HHHWHHHHW";
m["chromatic"] = "HHHHHHHHHHH";
return m;
}
string Scribbletune::getScaleFromScaleMaps(string scale) {
map<string,string> m = getScales();
return m[scale];
}
int Scribbletune::computeMidiPitchFromNote(string n) {
smatch match;
regex exp;
// n is something like G#4
// use a regular expression to get the note, accidental and octave
exp = "([a-gA-G])([b#])?([0-9])";
regex_match(n, match, exp);
string note; // G
string accidental; // # or b
int octave; // 4
note = match[1];
accidental = match[2];
octave = stoi(match[3]);
int accidentalFactor;
accidentalFactor = (accidental == "#") ? 1 : -1;
return (12 * octave) + this->getPitchFromNote(note) + (accidentalFactor * accidental.size());
}
string Scribbletune::computeNoteFromMidiPitch(int p, string accidental) {
int octave;
int noteNum;
string noteName;
if (p > 23) {
// noteNum is on octave 1 or more
octave = p / 12 - 1;
// subtract number of octaves from noteNum
noteNum = p - octave * 12;
}
noteName = this->getNoteFromPitch(noteNum, accidental);
return noteName + to_string(octave);
}
vector<string> Scribbletune::scale(string name) {
smatch match;
regex exp;
exp = "([a-gA-G][b#]?[0-9]) (.+)";
regex_match(name, match, exp);
string note;
string scale;
note = match[1]; // C4
scale = match[2]; // major
vector<string> v;
v.push_back(note);
// update the regular expression to get the accidental from the note
exp = "([a-gA-G])([b#])?([0-9])";
regex_match(note, match, exp);
string accidental = match[2]; // # or b
int pitch = this->computeMidiPitchFromNote(note);
string scaleMap = this->getScaleFromScaleMaps(scale);
for (int i = 0; i < scaleMap.length(); i++) {
if (scaleMap.at(i) == 'W') {
pitch += 2;
} else {
pitch += 1;
}
v.push_back(this->computeNoteFromMidiPitch(pitch, accidental));
}
return v;
}