Spaces:
Running
Running
File size: 10,034 Bytes
1509d53 a607fb8 a2e77f3 1509d53 a607fb8 1509d53 a607fb8 1509d53 a607fb8 1509d53 a607fb8 1509d53 07a4968 1509d53 6b7e7b3 1509d53 a607fb8 1509d53 a607fb8 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 |
/**
* Play audio samples using the Web Audio API.
* @param {Float32Array} audioSamples - The audio samples to play.
* @param {number} sampleRate - The sample rate of the audio samples.
*/
function playAudioSamples(audioSamples, sampleRate = 16000) {
// Create an AudioContext
const audioContext = new (window.AudioContext || window.webkitAudioContext)();
// Create an AudioBuffer
const audioBuffer = audioContext.createBuffer(
1, // number of channels
audioSamples.length, // length of the buffer in samples
sampleRate // sample rate (samples per second)
);
// Fill the AudioBuffer with the Float32Array of audio samples
audioBuffer.getChannelData(0).set(audioSamples);
// Create a BufferSource node
const source = audioContext.createBufferSource();
source.buffer = audioBuffer;
// Connect the source to the AudioContext's destination (the speakers)
source.connect(audioContext.destination);
// Start playback
source.start();
};
/**
* Turns floating-point audio samples to a Wave blob.
* @param {Float32Array} audioSamples - The audio samples to play.
* @param {number} sampleRate - The sample rate of the audio samples.
* @param {number} numChannels - The number of channels in the audio. Defaults to 1 (mono).
* @return {Blob} A blob of type `audio/wav`
*/
function samplesToBlob(audioSamples, sampleRate = 16000, numChannels = 1) {
// Helper to write a string to the DataView
const writeString = (view, offset, string) => {
for (let i = 0; i < string.length; i++) {
view.setUint8(offset + i, string.charCodeAt(i));
}
};
// Helper to convert Float32Array to Int16Array (16-bit PCM)
const floatTo16BitPCM = (output, offset, input) => {
for (let i = 0; i < input.length; i++, offset += 2) {
let s = Math.max(-1, Math.min(1, input[i])); // Clamping to [-1, 1]
output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true); // Convert to 16-bit PCM
}
};
const byteRate = sampleRate * numChannels * 2; // 16-bit PCM = 2 bytes per sample
// Calculate sizes
const blockAlign = numChannels * 2; // 2 bytes per sample for 16-bit audio
const wavHeaderSize = 44;
const dataLength = audioSamples.length * numChannels * 2; // 16-bit PCM data length
const buffer = new ArrayBuffer(wavHeaderSize + dataLength);
const view = new DataView(buffer);
// Write WAV file headers
writeString(view, 0, 'RIFF'); // ChunkID
view.setUint32(4, 36 + dataLength, true); // ChunkSize
writeString(view, 8, 'WAVE'); // Format
writeString(view, 12, 'fmt '); // Subchunk1ID
view.setUint32(16, 16, true); // Subchunk1Size (PCM = 16)
view.setUint16(20, 1, true); // AudioFormat (PCM = 1)
view.setUint16(22, numChannels, true); // NumChannels
view.setUint32(24, sampleRate, true); // SampleRate
view.setUint32(28, byteRate, true); // ByteRate
view.setUint16(32, blockAlign, true); // BlockAlign
view.setUint16(34, 16, true); // BitsPerSample (16-bit PCM)
writeString(view, 36, 'data'); // Subchunk2ID
view.setUint32(40, dataLength, true); // Subchunk2Size
// Convert the Float32Array audio samples to 16-bit PCM and write them to the DataView
floatTo16BitPCM(view, wavHeaderSize, audioSamples);
// Create and return the Blob
return new Blob([view], { type: 'audio/wav' });
}
/**
* Renders a blob to an audio element with controls.
* Use `appendChild(result)` to add to the document or a node.
* @param {Blob} audioBlob - A blob with a valid audio type.
* @see samplesToBlob
*/
function blobToAudio(audioBlob) {
const url = URL.createObjectURL(audioBlob);
const audio = document.createElement("audio");
audio.controls = true;
audio.src = url;
return audio;
}
/** Configuration */
const colors = {
"buddy": [0,119,187],
"hey buddy": [51,187,238],
"hi buddy": [0,153,136],
"sup buddy": [238,119,51],
"yo buddy": [204,51,17],
"okay buddy": [238,51,119],
"speech": [22,200,206],
"frame budget": [25,255,25]
};
const rootUrl = "https://huggingface.co/benjamin-paine/hey-buddy/resolve/main";
const wakeWords = ["buddy", "hey buddy", "hi buddy", "sup buddy", "yo buddy", "okay buddy"];
const canvasSize = { width: 640, height: 100 };
const graphLineWidth = 1;
const options = {
debug: true,
modelPath: wakeWords.map((word) => `${rootUrl}/models/${word.replace(' ', '-')}.onnx`),
vadModelPath: `${rootUrl}/pretrained/silero-vad.onnx`,
spectrogramModelPath: `${rootUrl}/pretrained/mel-spectrogram.onnx`,
embeddingModelPath: `${rootUrl}/pretrained/speech-embedding.onnx`,
};
/** Main */
document.addEventListener("DOMContentLoaded", () => {
/** DOM elements */
const graphsContainer = document.getElementById("graphs");
const audioContainer = document.getElementById("audio");
/** Memory for drawing */
const graphs = {};
const history = {};
const current = {};
const active = {};
/** Instantiate */
const heyBuddy = new HeyBuddy(options);
/** Add callbacks */
// When processed, update state for next draw
heyBuddy.onProcessed((result) => {
current["frame budget"] = heyBuddy.frameTimeEma;
current["speech"] = result.speech.probability || 0.0;
active["speech"] = result.speech.active;
for (let wakeWord in result.wakeWords) {
current[wakeWord.replace('-', ' ')] = result.wakeWords[wakeWord].probability || 0.0;
active[wakeWord.replace('-', ' ')] = result.wakeWords[wakeWord].active;
}
if (result.recording) {
audioContainer.innerHTML = "Recording…";
}
});
// When recording is complete, replace the audio element
heyBuddy.onRecording((audioSamples) => {
const audioBlob = samplesToBlob(audioSamples);
const audioElement = blobToAudio(audioBlob);
audioContainer.innerHTML = "";
audioContainer.appendChild(audioElement);
});
/** Add graphs */
for (let graphName of ["wake words", "speech", "frame budget"]) {
// Create containers for the graph and its label
const graphContainer = document.createElement("div");
const graphLabel = document.createElement("label");
graphLabel.textContent = graphName;
// Create a canvas for the graph
const graphCanvas = document.createElement("canvas");
graphCanvas.className = "graph";
graphCanvas.width = canvasSize.width;
graphCanvas.height = canvasSize.height;
graphs[graphName] = graphCanvas;
// Add the canvas to the container and the container to the document
graphContainer.appendChild(graphCanvas);
graphContainer.appendChild(graphLabel);
graphsContainer.appendChild(graphContainer);
// If this is the wake-word graph, also add legend
if (graphName === "wake words") {
const graphLegend = document.createElement("div");
graphLegend.className = "legend";
for (let wakeWord of wakeWords) {
const legendItem = document.createElement("div");
const [r,g,b] = colors[wakeWord];
legendItem.style.color = `rgb(${r},${g},${b})`;
legendItem.textContent = wakeWord;
graphLegend.appendChild(legendItem);
}
graphLabel.appendChild(graphLegend);
}
}
/** Define draw loop */
const draw = () => {
// Draw speech and model graphs
for (let graphName in graphs) {
const isWakeWords = graphName === "wake words";
const isFrameBudget = graphName === "frame budget";
const subGraphs = isWakeWords ? wakeWords : [graphName];
let isFirst = true;
for (let name of subGraphs) {
// Update history
history[name] = history[name] || [];
if (isFrameBudget) {
history[name].push((current[name] || 0.0) / 120.0); // 120ms budget
} else {
history[name].push(current[name] || 0.0);
}
// Trim history
if (history[name].length > canvasSize.width) {
history[name] = history[name].slice(history[name].length - canvasSize.width);
}
// Draw graph
const canvas = graphs[graphName];
const ctx = canvas.getContext("2d");
const [r,g,b] = colors[name];
const opacity = isFrameBudget || active[name] ? 1.0 : 0.5;
if (isFirst) {
// Clear canvas on first draw
ctx.clearRect(0, 0, canvas.width, canvas.height);
isFirst = false;
}
ctx.strokeStyle = `rgba(${r},${g},${b},${opacity})`;
ctx.fillStyle = `rgba(${r},${g},${b},${opacity/2})`;
ctx.lineWidth = graphLineWidth;
// Draw from left to right (the frame shifts right to left)
ctx.beginPath();
let lastX;
for (let i = 0; i < history[name].length; i++) {
const x = i;
const y = canvas.height - history[name][i] * canvas.height;
if (i === 0) {
ctx.moveTo(1, y);
} else {
ctx.lineTo(x, y);
}
lastX = x;
}
// extend downwards to make a polygon
ctx.lineTo(lastX, canvas.height);
ctx.lineTo(0, canvas.height);
ctx.closePath();
ctx.fill();
ctx.stroke();
}
}
// Request next frame
requestAnimationFrame(draw);
};
/** Start the loop */
requestAnimationFrame(draw);
});
|