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<html lang="en-us"> | |
<head> | |
<title>command : Voice assistant example using Whisper + WebAssembly</title> | |
<style> | |
#output { | |
width: 100%; | |
height: 100%; | |
margin: 0 auto; | |
margin-top: 10px; | |
border-left: 0px; | |
border-right: 0px; | |
padding-left: 0px; | |
padding-right: 0px; | |
display: block; | |
background-color: black; | |
color: white; | |
font-size: 10px; | |
font-family: 'Lucida Console', Monaco, monospace; | |
outline: none; | |
white-space: pre; | |
overflow-wrap: normal; | |
overflow-x: scroll; | |
} | |
</style> | |
</head> | |
<body> | |
<div id="main-container"> | |
<b>command : Voice assistant example using Whisper + WebAssembly</b> | |
<br><br> | |
You can find more about this project on <a href="https://github.com/ggerganov/whisper.cpp/tree/master/examples/command.wasm">GitHub</a>. | |
<br><br> | |
<b>More examples:</b> | |
<a href="https://whisper.ggerganov.com/">main</a> | | |
<a href="https://whisper.ggerganov.com/bench">bench</a> | | |
<a href="https://whisper.ggerganov.com/stream">stream</a> | | |
<a href="https://whisper.ggerganov.com/command">command</a> | | |
<a href="https://whisper.ggerganov.com/talk">talk</a> | | |
<br><br> | |
<hr> | |
Select the model you would like to use, click the "Start" button and follow the instructions. | |
<br><br> | |
<div id="model-whisper"> | |
Whisper model: <span id="model-whisper-status"></span> | |
<button id="fetch-whisper-tiny-en" onclick="loadWhisper('tiny.en')">tiny.en (75 MB)</button> | |
<button id="fetch-whisper-base-en" onclick="loadWhisper('base.en')">base.en (142 MB)</button> | |
<br><br> | |
Quantized models:<br><br> | |
<button id="fetch-whisper-tiny-en-q5_1" onclick="loadWhisper('tiny-en-q5_1')">tiny.en (Q5_1, 31 MB)</button> | |
<button id="fetch-whisper-base-en-q5_1" onclick="loadWhisper('base-en-q5_1')">base.en (Q5_1, 57 MB)</button> | |
<span id="fetch-whisper-progress"></span> | |
<!-- | |
<input type="file" id="file" name="file" onchange="loadFile(event, 'whisper.bin')" /> | |
--> | |
</div> | |
<br> | |
<div id="input"> | |
<button id="start" onclick="onStart()" disabled>Start</button> | |
<button id="stop" onclick="onStop()" disabled>Stop</button> | |
<button id="clear" onclick="clearCache()">Clear Cache</button> | |
</div> | |
<br> | |
<div id="state"> | |
Status: <b><span id="state-status">not started</span></b> | |
<pre id="state-transcribed">[The recognized voice commands will be displayed here]</pre> | |
</div> | |
<hr> | |
Debug output: | |
<textarea id="output" rows="20"></textarea> | |
<br> | |
<b>Troubleshooting</b> | |
<br><br> | |
The page does some heavy computations, so make sure: | |
<ul> | |
<li>To use a modern web browser (e.g. Chrome, Firefox)</li> | |
<li>To use a fast desktop or laptop computer (i.e. not a mobile phone)</li> | |
<li>Your browser supports WASM <a href="https://webassembly.org/roadmap/">Fixed-width SIMD</a></li> | |
</ul> | |
<div class="cell-version"> | |
<span> | |
| | |
Build time: <span class="nav-link">Fri Nov 17 10:42:04 2023</span> | | |
Commit hash: <a class="nav-link" href="https://github.com/ggerganov/whisper.cpp/commit/e2f0eba2">e2f0eba2</a> | | |
Commit subject: <span class="nav-link">ios : sync submodule</span> | | |
<a class="nav-link" href="https://github.com/ggerganov/whisper.cpp/tree/master/examples/command.wasm">Source Code</a> | | |
</span> | |
</div> | |
</div> | |
<script type="text/javascript" src="helpers.js"></script> | |
<script type='text/javascript'> | |
// web audio context | |
var context = null; | |
// audio data | |
var audio = null; | |
var audio0 = null; | |
// the command instance | |
var instance = null; | |
// model name | |
var model_whisper = null; | |
var Module = { | |
print: printTextarea, | |
printErr: printTextarea, | |
setStatus: function(text) { | |
printTextarea('js: ' + text); | |
}, | |
monitorRunDependencies: function(left) { | |
}, | |
preRun: function() { | |
printTextarea('js: Preparing ...'); | |
}, | |
postRun: function() { | |
printTextarea('js: Initialized successfully!'); | |
} | |
}; | |
// | |
// fetch models | |
// | |
let dbVersion = 1 | |
let dbName = 'whisper.ggerganov.com'; | |
let indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB | |
function storeFS(fname, buf) { | |
// write to WASM file using FS_createDataFile | |
// if the file exists, delete it | |
try { | |
Module.FS_unlink(fname); | |
} catch (e) { | |
// ignore | |
} | |
Module.FS_createDataFile("/", fname, buf, true, true); | |
printTextarea('storeFS: stored model: ' + fname + ' size: ' + buf.length); | |
document.getElementById('model-whisper-status').innerHTML = 'loaded "' + model_whisper + '"!'; | |
if (model_whisper != null) { | |
document.getElementById('start').disabled = false; | |
document.getElementById('stop' ).disabled = true; | |
} | |
} | |
function loadWhisper(model) { | |
let urls = { | |
'tiny.en': 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.en.bin', | |
'base.en': 'https://whisper.ggerganov.com/ggml-model-whisper-base.en.bin', | |
'tiny-en-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.en-q5_1.bin', | |
'base-en-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-base.en-q5_1.bin', | |
}; | |
let sizes = { | |
'tiny.en': 75, | |
'base.en': 142, | |
'tiny-en-q5_1': 31, | |
'base-en-q5_1': 57, | |
}; | |
let url = urls[model]; | |
let dst = 'whisper.bin'; | |
let size_mb = sizes[model]; | |
model_whisper = model; | |
document.getElementById('fetch-whisper-tiny-en').style.display = 'none'; | |
document.getElementById('fetch-whisper-base-en').style.display = 'none'; | |
document.getElementById('fetch-whisper-tiny-en-q5_1').style.display = 'none'; | |
document.getElementById('fetch-whisper-base-en-q5_1').style.display = 'none'; | |
document.getElementById('model-whisper-status').innerHTML = 'loading "' + model + '" ... '; | |
cbProgress = function(p) { | |
let el = document.getElementById('fetch-whisper-progress'); | |
el.innerHTML = Math.round(100*p) + '%'; | |
}; | |
cbCancel = function() { | |
var el; | |
el = document.getElementById('fetch-whisper-tiny-en'); if (el) el.style.display = 'inline-block'; | |
el = document.getElementById('fetch-whisper-base-en'); if (el) el.style.display = 'inline-block'; | |
el = document.getElementById('fetch-whisper-tiny-en-q5_1'); if (el) el.style.display = 'inline-block'; | |
el = document.getElementById('fetch-whisper-base-en-q5_1'); if (el) el.style.display = 'inline-block'; | |
el = document.getElementById('model-whisper-status'); if (el) el.innerHTML = ''; | |
}; | |
loadRemote(url, dst, size_mb, cbProgress, storeFS, cbCancel, printTextarea); | |
} | |
// | |
// microphone | |
// | |
const kSampleRate = 16000; | |
const kRestartRecording_s = 120; | |
const kIntervalAudio_ms = 250; // pass the recorded audio to the C++ instance at this rate | |
var mediaRecorder = null; | |
var doRecording = false; | |
var startTime = 0; | |
window.AudioContext = window.AudioContext || window.webkitAudioContext; | |
window.OfflineAudioContext = window.OfflineAudioContext || window.webkitOfflineAudioContext; | |
function stopRecording() { | |
Module.set_status("paused"); | |
doRecording = false; | |
audio0 = null; | |
audio = null; | |
context = null; | |
} | |
function startRecording() { | |
if (!context) { | |
context = new AudioContext({ | |
sampleRate: kSampleRate, | |
channelCount: 1, | |
echoCancellation: false, | |
autoGainControl: true, | |
noiseSuppression: true, | |
}); | |
} | |
Module.set_status(""); | |
document.getElementById('start').disabled = true; | |
document.getElementById('stop').disabled = false; | |
doRecording = true; | |
startTime = Date.now(); | |
var chunks = []; | |
var stream = null; | |
navigator.mediaDevices.getUserMedia({audio: true, video: false}) | |
.then(function(s) { | |
stream = s; | |
mediaRecorder = new MediaRecorder(stream); | |
mediaRecorder.ondataavailable = function(e) { | |
chunks.push(e.data); | |
var blob = new Blob(chunks, { 'type' : 'audio/ogg; codecs=opus' }); | |
var reader = new FileReader(); | |
reader.onload = function(event) { | |
var buf = new Uint8Array(reader.result); | |
if (!context) { | |
return; | |
} | |
context.decodeAudioData(buf.buffer, function(audioBuffer) { | |
var offlineContext = new OfflineAudioContext(audioBuffer.numberOfChannels, audioBuffer.length, audioBuffer.sampleRate); | |
var source = offlineContext.createBufferSource(); | |
source.buffer = audioBuffer; | |
source.connect(offlineContext.destination); | |
source.start(0); | |
offlineContext.startRendering().then(function(renderedBuffer) { | |
audio = renderedBuffer.getChannelData(0); | |
//printTextarea('js: audio recorded, size: ' + audio.length + ', old size: ' + (audio0 == null ? 0 : audio0.length)); | |
var audioAll = new Float32Array(audio0 == null ? audio.length : audio0.length + audio.length); | |
if (audio0 != null) { | |
audioAll.set(audio0, 0); | |
} | |
audioAll.set(audio, audio0 == null ? 0 : audio0.length); | |
if (instance) { | |
Module.set_audio(instance, audioAll); | |
} | |
}); | |
}, function(e) { | |
audio = null; | |
}); | |
} | |
reader.readAsArrayBuffer(blob); | |
}; | |
mediaRecorder.onstop = function(e) { | |
if (doRecording) { | |
setTimeout(function() { | |
startRecording(); | |
}); | |
} | |
}; | |
mediaRecorder.start(kIntervalAudio_ms); | |
}) | |
.catch(function(err) { | |
printTextarea('js: error getting audio stream: ' + err); | |
}); | |
var interval = setInterval(function() { | |
if (!doRecording) { | |
clearInterval(interval); | |
mediaRecorder.stop(); | |
stream.getTracks().forEach(function(track) { | |
track.stop(); | |
}); | |
document.getElementById('start').disabled = false; | |
document.getElementById('stop').disabled = true; | |
mediaRecorder = null; | |
} | |
// if audio length is more than kRestartRecording_s seconds, restart recording | |
if (audio != null && audio.length > kSampleRate*kRestartRecording_s) { | |
if (doRecording) { | |
//printTextarea('js: restarting recording'); | |
clearInterval(interval); | |
audio0 = audio; | |
audio = null; | |
mediaRecorder.stop(); | |
stream.getTracks().forEach(function(track) { | |
track.stop(); | |
}); | |
} | |
} | |
}, 100); | |
} | |
// | |
// main | |
// | |
var nLines = 0; | |
var intervalUpdate = null; | |
var transcribedAll = ''; | |
function onStart() { | |
if (!instance) { | |
instance = Module.init('whisper.bin'); | |
if (instance) { | |
printTextarea("js: whisper initialized, instance: " + instance); | |
} | |
} | |
if (!instance) { | |
printTextarea("js: failed to initialize whisper"); | |
return; | |
} | |
startRecording(); | |
intervalUpdate = setInterval(function() { | |
var transcribed = Module.get_transcribed(); | |
if (transcribed != null && transcribed.length > 1) { | |
transcribedAll += transcribed + '<br>'; | |
nLines++; | |
// if more than 10 lines, remove the first line | |
if (nLines > 10) { | |
var i = transcribedAll.indexOf('<br>'); | |
if (i > 0) { | |
transcribedAll = transcribedAll.substring(i + 4); | |
nLines--; | |
} | |
} | |
} | |
document.getElementById('state-status').innerHTML = Module.get_status(); | |
document.getElementById('state-transcribed').innerHTML = transcribedAll; | |
}, 100); | |
} | |
function onStop() { | |
stopRecording(); | |
} | |
</script> | |
<script type="text/javascript" src="command.js"></script> | |
</body> | |
</html> | |