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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| import { Alert, IconButton, Slider, Snackbar, Stack, Typography } from '@mui/material' | ||
| import { useEffect, useRef, useState } from 'react' | ||
| import { Pause, PlayArrow } from '@mui/icons-material' | ||
| import { SplendidGrandPiano } from 'smplr' | ||
| import MidiPlayer from 'midi-player-js' | ||
|
|
||
| const base64ToArrayBuffer = base64 => Uint8Array.from(atob(base64), c => c.charCodeAt(0)) | ||
| const formatTime = time => new Date(1000 * time).toTimeString().slice(4, 8) | ||
|
|
||
| export const Player = ({ pageCount }) => { | ||
| const [time, setTime] = useState(0) | ||
| const [isOpen, setIsOpen] = useState(false) | ||
| const [isPlaying, setIsPlaying] = useState(false) | ||
| const context = new AudioContext() | ||
| const pianoApi = useRef(null) | ||
| const [midiApi] = useState( | ||
| () => | ||
| new MidiPlayer.Player(e => { | ||
| if (e.name.includes('Note on')) | ||
| pianoApi.current.start({ note: e.noteName, velocity: e.velocity, time: 5, duration: 1 }) | ||
| setTime(100 - midiApi.getSongPercentRemaining()) | ||
| setIsPlaying(midiApi.isPlaying()) | ||
| }) | ||
| ) | ||
|
|
||
| const setTimePosition = (e, time) => { | ||
| setTime(time) | ||
| setIsPlaying(midiApi.isPlaying()) | ||
| midiApi.skipToPercent(time) | ||
| } | ||
|
|
||
| const loadPiano = async () => { | ||
| pianoApi.current = await new SplendidGrandPiano(context).load | ||
| setIsOpen(true) | ||
| } | ||
|
|
||
| useEffect(() => { | ||
| if (pageCount) { | ||
| const base64 = window.tk.renderToMIDI() | ||
| const buffer = base64ToArrayBuffer(base64) | ||
| midiApi.loadArrayBuffer(buffer) | ||
| } | ||
| }, [pageCount]) | ||
|
|
||
| useEffect(() => { | ||
| if (!pianoApi.current) loadPiano() | ||
| }, []) | ||
|
|
||
| if (midiApi) | ||
| return ( | ||
| <Snackbar open={isOpen} anchorOrigin={{ vertical: 'bottom', horizontal: 'center' }}> | ||
| <Alert | ||
| sx={{ | ||
| borderRadius: 3, | ||
| boxShadow: 1, | ||
| bgcolor: 'secondary.light', | ||
| '& .MuiAlert-icon': { display: 'none' }, | ||
| }} | ||
| > | ||
| <Stack width={300} spacing={2} direction="row" alignItems="center"> | ||
| <IconButton | ||
| onClick={() => { | ||
| try { | ||
| setIsPlaying(!isPlaying) | ||
| context.resume() | ||
| midiApi.play() | ||
| } catch (error) { | ||
| midiApi.pause() | ||
| } | ||
| }} | ||
| > | ||
| {isPlaying ? <Pause /> : <PlayArrow />} | ||
| </IconButton> | ||
| <Typography>{formatTime(midiApi.getSongTime() - midiApi.getSongTimeRemaining())}</Typography> | ||
| <Slider value={time} onChange={setTimePosition} /> | ||
| <Typography>-{formatTime(midiApi.getSongTimeRemaining())}</Typography> | ||
| </Stack> | ||
| </Alert> | ||
| </Snackbar> | ||
| ) | ||
| } |
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