108 lines
2.9 KiB
JavaScript
108 lines
2.9 KiB
JavaScript
/**
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import {Midi} from 'MidiConvert/src/Midi'
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import Tone from 'Tone/core/Tone'
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import MidiConvert from 'MidiConvert/src/MidiConvert'
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import events from 'events'
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window.generator = 'pop'
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class AI extends events.EventEmitter{
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constructor(){
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super()
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this._newTrack()
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this._sendTimeout = -1
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this._heldNotes = {}
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this._lastPhrase = -1
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/*setInterval(() => {
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//wait a max of 10 seconds before sending an event
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if (Date.now() - this._phraseStart > 5000){
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for (let note in this._heldNotes){
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this._track.noteOff(note, Tone.now())
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delete this._heldNotes[note]
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}
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this.send()
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}
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}, 200)*/
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this._aiEndTime = 0
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}
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_newTrack(){
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this._midi = new Midi()
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this._track = this._midi.track()
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}
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send(){
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//trim the track to the first note
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if (this._track.length){
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let request = this._midi.slice(this._midi.startTime)
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this._newTrack()
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let endTime = request.duration
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//shorten the request if it's too long
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if (endTime > 10){
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request = request.slice(request.duration - 15)
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endTime = request.duration
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}
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let additional = endTime
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additional = Math.min(additional, 8)
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additional = Math.max(additional, 1)
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request.load(`/predict?duration=${endTime + additional}&generator=${generator}`, JSON.stringify(request.toArray()), 'POST').then((response) => {
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response.slice(endTime / 2).tracks[1].notes.forEach((note) => {
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const now = Tone.now()
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if (note.noteOn + now > this._aiEndTime){
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this._aiEndTime = note.noteOn + now
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this.emit('keyDown', note.midi, note.noteOn + now)
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note.duration = note.duration * 0.9
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this.emit('keyUp', note.midi, note.noteOff + now)
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}
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})
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})
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this._lastPhrase = -1
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}
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}
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keyDown(note){
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if (this._track.length === 0 && this._lastPhrase === -1){
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this._lastPhrase = Date.now()
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}
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this._track.noteOn(note, Tone.now())
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clearTimeout(this._sendTimeout)
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this._heldNotes[note] = true
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}
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keyUp(note){
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this._track.noteOff(note, Tone.now())
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delete this._heldNotes[note]
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// send something if there are no events for a moment
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if (Object.keys(this._heldNotes).length === 0){
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if (this._lastPhrase !== -1 && Date.now() - this._lastPhrase > 5000){
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//do it immediately
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this.send()
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} else {
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this._sendTimeout = setTimeout(this.send.bind(this), 600)
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}
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}
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}
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}
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export {AI} |