Created
April 10, 2020 12:39
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try { | |
window.AudioContext = window.AudioContext || window.webkitAudioContext; | |
window.audioContext = new AudioContext(); | |
} catch (e) { | |
alert('Web Audio API not supported.'); | |
} | |
document.querySelector('button#control').addEventListener('click', function() { | |
audioContext.resume().then(() => { | |
console.log('Playback resumed successfully'); | |
}); | |
}); | |
var constraints = window.constraints = { | |
audio: true, | |
video: false | |
}; | |
$(document).ready(() => { | |
console.log('document.ready'); | |
const button = $("button#control"); | |
button.click(() => { | |
if (button.text() === 'Start') { | |
console.log('Start Recording, API calls'); | |
navigator.mediaDevices.getUserMedia(constraints). | |
then(handleSuccess).catch(handleError); | |
button.text('Stop').addClass('stop').removeClass('start'); | |
} else { | |
if (window.script) { | |
window.script.onaudioprocess = function() {}; | |
} | |
if (window.socket) { | |
window.socket.readyState && window.socket.send('end'); | |
window.socket.readyState && window.socket.close(); | |
} | |
button.text('Start').removeClass('stop').addClass('start'); | |
} | |
}) | |
}); | |
function handleSuccess(stream) { | |
// var socket = new WebSocket("wss://cloudspeech.goog/ws"); | |
var socket = new WebSocket("ws://localhost:12345/"); | |
socket.binaryType = "arraybuffer"; | |
socket.onopen = function() { | |
// socket.send(JSON.stringify({ | |
// format: "LINEAR16", | |
// language: 'en-US', | |
// punctuation: true, | |
// rate: 44100 | |
// })); | |
socket.send('start'); | |
} | |
var audioTracks = stream.getAudioTracks(); | |
stream.oninactive = function() { | |
console.log('Stream ended'); | |
}; | |
window.stream = stream; // make variable available to browser console | |
// audio.srcObject = stream; | |
var script = window.audioContext.createScriptProcessor(4096, 1, 1); | |
script.onaudioprocess = function(event) { | |
var input = event.inputBuffer.getChannelData(0) || new Float32Array(4096); | |
for (var idx = input.length, newData = new Int16Array(idx); idx--;) | |
newData[idx] = 32767 * Math.min(1, input[idx]); | |
if (socket.readyState === 1) { | |
// console.log(newData); | |
// socket.send(newData.buffer); | |
socket.send(newData); | |
} | |
} | |
socket.onmessage = function(b) { | |
const data = JSON.parse(b.data); | |
// console.log(data); | |
if (data.isFinal) { | |
$(".output-final").append( | |
"<p>" + data.text + "</p>" | |
); | |
} else { | |
$(".output").text(data.text); | |
} | |
}; | |
var mic = window.audioContext.createMediaStreamSource(stream); | |
mic.connect(script); | |
script.connect(window.audioContext.destination); | |
window.socket = socket; | |
window.script = script; | |
} | |
function handleError(error) { | |
console.log('navigator.getUserMedia error: ', error); | |
} |
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