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August 13, 2024 09:40
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// Record plugin | |
import WaveSurfer from 'https://unpkg.com/[email protected]/dist/wavesurfer.esm.js' | |
import RecordPlugin from 'https://unpkg.com/[email protected]/dist/plugins/record.esm.js' | |
const wavesurfer2 = WaveSurfer.create({ | |
container: document.body, | |
waveColor: 'rgb(200, 0, 200)', | |
progressColor: 'rgb(100, 0, 100)', | |
url: '/examples/audio/audio.wav', | |
barWidth: 2, | |
barGap: 1, | |
barRadius: 2, | |
}) | |
wavesurfer2.on('ready', () => { | |
let wavesurfer, record | |
let scrollingWaveform = false | |
let continuousWaveform = true | |
const createWaveSurfer = () => { | |
// Destroy the previous wavesurfer instance | |
if (wavesurfer) { | |
wavesurfer.destroy() | |
} | |
// Create a new Wavesurfer instance | |
wavesurfer = WaveSurfer.create({ | |
container: '#mic', | |
waveColor: 'rgb(200, 0, 200)', | |
progressColor: 'rgb(100, 0, 100)', | |
barWidth: 2, | |
barGap: 1, | |
barRadius: 2, | |
}) | |
// Initialize the Record plugin | |
record = wavesurfer.registerPlugin( | |
RecordPlugin.create({ | |
renderRecordedAudio: false, | |
scrollingWaveform, | |
continuousWaveform, | |
continuousWaveformDuration: wavesurfer2.getDuration(), // optional | |
}), | |
) | |
// Render recorded audio | |
record.on('record-end', (blob) => { | |
const container = document.querySelector('#recordings') | |
const recordedUrl = URL.createObjectURL(blob) | |
// Create wavesurfer from the recorded audio | |
const wavesurfer = WaveSurfer.create({ | |
container, | |
waveColor: 'rgb(200, 100, 0)', | |
progressColor: 'rgb(100, 50, 0)', | |
url: recordedUrl, | |
}) | |
// Play button | |
const button = container.appendChild(document.createElement('button')) | |
button.textContent = 'Play' | |
button.onclick = () => wavesurfer.playPause() | |
wavesurfer.on('pause', () => (button.textContent = 'Play')) | |
wavesurfer.on('play', () => (button.textContent = 'Pause')) | |
// Download link | |
const link = container.appendChild(document.createElement('a')) | |
Object.assign(link, { | |
href: recordedUrl, | |
download: 'recording.' + blob.type.split(';')[0].split('/')[1] || 'webm', | |
textContent: 'Download recording', | |
}) | |
}) | |
pauseButton.style.display = 'none' | |
recButton.textContent = 'Record' | |
record.on('record-progress', (time) => { | |
updateProgress(time) | |
}) | |
} | |
const progress = document.querySelector('#progress') | |
const updateProgress = (time) => { | |
// time will be in milliseconds, convert it to mm:ss format | |
const formattedTime = [ | |
Math.floor((time % 3600000) / 60000), // minutes | |
Math.floor((time % 60000) / 1000), // seconds | |
] | |
.map((v) => (v < 10 ? '0' + v : v)) | |
.join(':') | |
progress.textContent = formattedTime | |
} | |
const pauseButton = document.querySelector('#pause') | |
pauseButton.onclick = () => { | |
if (record.isPaused()) { | |
record.resumeRecording() | |
pauseButton.textContent = 'Pause' | |
return | |
} | |
record.pauseRecording() | |
pauseButton.textContent = 'Resume' | |
} | |
const micSelect = document.querySelector('#mic-select') | |
{ | |
// Mic selection | |
RecordPlugin.getAvailableAudioDevices().then((devices) => { | |
devices.forEach((device) => { | |
const option = document.createElement('option') | |
option.value = device.deviceId | |
option.text = device.label || device.deviceId | |
micSelect.appendChild(option) | |
}) | |
}) | |
} | |
// Record button | |
const recButton = document.querySelector('#record') | |
recButton.onclick = () => { | |
wavesurfer2.play() | |
if (record.isRecording() || record.isPaused()) { | |
record.stopRecording() | |
recButton.textContent = 'Record' | |
pauseButton.style.display = 'none' | |
return | |
} | |
recButton.disabled = true | |
// reset the wavesurfer instance | |
// get selected device | |
const deviceId = micSelect.value | |
record.startRecording({ deviceId }).then(() => { | |
recButton.textContent = 'Stop' | |
recButton.disabled = false | |
pauseButton.style.display = 'inline' | |
}) | |
} | |
document.querySelector('#scrollingWaveform').onclick = (e) => { | |
scrollingWaveform = e.target.checked | |
if (continuousWaveform && scrollingWaveform) { | |
continuousWaveform = false | |
document.querySelector('#continuousWaveform').checked = false | |
} | |
createWaveSurfer() | |
} | |
document.querySelector('#continuousWaveform').onclick = (e) => { | |
continuousWaveform = e.target.checked | |
if (continuousWaveform && scrollingWaveform) { | |
scrollingWaveform = false | |
document.querySelector('#scrollingWaveform').checked = false | |
} | |
createWaveSurfer() | |
} | |
createWaveSurfer() | |
}) | |
/* | |
<html> | |
<h1 style="margin-top: 0">Press Record to start recording 🎙️</h1> | |
<p> | |
📖 <a href="https://wavesurfer.xyz/docs/classes/plugins_record.RecordPlugin">Record plugin docs</a> | |
</p> | |
<button id="record">Record</button> | |
<button id="pause" style="display: none;">Pause</button> | |
<select id="mic-select"> | |
<option value="" hidden>Select mic</option> | |
</select> | |
<label><input type="checkbox" id="scrollingWaveform" /> Scrolling waveform</label> | |
<label><input type="checkbox" id="continuousWaveform" checked="checked" /> Continuous waveform</label> | |
<p id="progress">00:00</p> | |
<div id="mic" style="border-radius: 4px; margin-top: 1rem"></div> | |
<div id="recordings" style="margin: 1rem 0"></div> | |
<style> | |
button { | |
min-width: 5rem; | |
margin: 1rem 1rem 1rem 0; | |
} | |
</style> | |
</html> | |
*/ |
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