qambi/dist/midi_note.js

MIDI sequencer, loads MIDI files, can record and playback MIDI, uses WebMIDI and WebAudio

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.MIDINote = undefined;

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _midi_event = require('./midi_event');

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var instanceIndex = 0;

var MIDINote = exports.MIDINote = function () {
  function MIDINote(noteon, noteoff) {
    _classCallCheck(this, MIDINote);

    //if(noteon.type !== 144 || noteoff.type !== 128){
    if (noteon.type !== 144) {
      console.warn('cannot create MIDINote');
      return;
    }
    this.id = this.constructor.name + '_' + instanceIndex++ + '_' + new Date().getTime();
    this.noteOn = noteon;
    noteon.midiNote = this;
    noteon.midiNoteId = this.id;

    if (noteoff instanceof _midi_event.MIDIEvent) {
      this.noteOff = noteoff;
      noteoff.midiNote = this;
      noteoff.midiNoteId = this.id;
      this.durationTicks = noteoff.ticks - noteon.ticks;
      this.durationMillis = -1;
    }
  }

  _createClass(MIDINote, [{
    key: 'addNoteOff',
    value: function addNoteOff(noteoff) {
      this.noteOff = noteoff;
      noteoff.midiNote = this;
      noteoff.midiNoteId = this.id;
      this.durationTicks = noteoff.ticks - this.noteOn.ticks;
      this.durationMillis = -1;
    }
  }, {
    key: 'copy',
    value: function copy() {
      return new MIDINote(this.noteOn.copy(), this.noteOff.copy());
    }
  }, {
    key: 'update',
    value: function update() {
      // may use another name for this method
      this.durationTicks = this.noteOff.ticks - this.noteOn.ticks;
    }
  }, {
    key: 'transpose',
    value: function transpose(amount) {
      this.noteOn.transpose(amount);
      this.noteOff.transpose(amount);
    }
  }, {
    key: 'move',
    value: function move(ticks) {
      this.noteOn.move(ticks);
      this.noteOff.move(ticks);
    }
  }, {
    key: 'moveTo',
    value: function moveTo(ticks) {
      this.noteOn.moveTo(ticks);
      this.noteOff.moveTo(ticks);
    }
  }, {
    key: 'unregister',
    value: function unregister() {
      if (this.part) {
        this.part.removeEvents(this);
        this.part = null;
      }
      if (this.track) {
        this.track.removeEvents(this);
        this.track = null;
      }
      if (this.song) {
        this.song.removeEvents(this);
        this.song = null;
      }
    }
  }]);

  return MIDINote;
}();