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ChomeNS 2022-11-20 09:09:36 +07:00
parent 44f3be1c18
commit 3f0c366cf9
1 changed files with 17 additions and 15 deletions
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32
util/midi_converter/main.js
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@ -1,36 +1,38 @@
const { Midi } = require('@tonejs/midi') /* eslint-disable max-len */
const { convertNote, convertPercussionNote } = require('./convert_note.js') /* eslint-disable require-jsdoc */
const {Midi} = require('@tonejs/midi');
const {convertNote, convertPercussionNote} = require('./convert_note.js');
function convertMidi (midi) { function convertMidi(midi) {
if (!(midi instanceof Midi)) throw new TypeError("midi must be an instance of require('@tonejs/midi').Midi") if (!(midi instanceof Midi)) throw new TypeError('midi must be an instance of require(\'@tonejs/midi\').Midi');
let noteList = [] let noteList = [];
for (const track of midi.tracks) { for (const track of midi.tracks) {
for (const note of track.notes) { for (const note of track.notes) {
const mcNote = (track.instrument.percussion ? convertPercussionNote : convertNote)(track, note) const mcNote = (track.instrument.percussion ? convertPercussionNote : convertNote)(track, note);
if (mcNote != null) { if (mcNote != null) {
noteList.push(mcNote) noteList.push(mcNote);
} }
} }
} }
noteList = noteList.sort((a, b) => a.time - b.time) noteList = noteList.sort((a, b) => a.time - b.time);
// It might be better to move some of this code to the converting loop (for performance reasons) // It might be better to move some of this code to the converting loop (for performance reasons)
let maxVolume = 0.001 let maxVolume = 0.001;
for (const note of noteList) { for (const note of noteList) {
if (note.volume > maxVolume) maxVolume = note.volume if (note.volume > maxVolume) maxVolume = note.volume;
} }
for (const note of noteList) { for (const note of noteList) {
note.volume /= maxVolume note.volume /= maxVolume;
} }
let songLength = 0 let songLength = 0;
for (const note of noteList) { for (const note of noteList) {
if (note.time > songLength) songLength = note.time if (note.time > songLength) songLength = note.time;
} }
return { name: midi.header.name, notes: noteList, loop: false, loopPosition: 0, length: songLength } return {name: midi.header.name, notes: noteList, loop: false, loopPosition: 0, length: songLength};
} }
module.exports = { convertMidi, convertNote, convertPercussionNote } module.exports = {convertMidi, convertNote, convertPercussionNote};