89 lines
2.4 KiB
JavaScript
89 lines
2.4 KiB
JavaScript
// Copyright (c) 2023-2024 Xiaomi Corporation (authors: Fangjun Kuang)
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const portAudio = require('naudiodon2');
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// console.log(portAudio.getDevices());
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const sherpa_onnx = require('sherpa-onnx-node');
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function createVad() {
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// please download silero_vad.onnx from
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// https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/silero_vad.onnx
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const config = {
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sileroVad: {
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model: './silero_vad.onnx',
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threshold: 0.5,
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minSpeechDuration: 0.25,
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minSilenceDuration: 0.5,
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windowSize: 512,
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},
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sampleRate: 16000,
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debug: true,
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numThreads: 1,
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};
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const bufferSizeInSeconds = 60;
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return new sherpa_onnx.Vad(config, bufferSizeInSeconds);
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}
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const vad = createVad();
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const bufferSizeInSeconds = 30;
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const buffer =
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new sherpa_onnx.CircularBuffer(bufferSizeInSeconds * vad.config.sampleRate);
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const ai = new portAudio.AudioIO({
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inOptions: {
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channelCount: 1,
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closeOnError: true, // Close the stream if an audio error is detected, if
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// set false then just log the error
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deviceId: -1, // Use -1 or omit the deviceId to select the default device
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sampleFormat: portAudio.SampleFormatFloat32,
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sampleRate: vad.config.sampleRate,
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}
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});
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let printed = false;
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let index = 0;
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ai.on('data', data => {
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const windowSize = vad.config.sileroVad.windowSize;
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buffer.push(new Float32Array(data.buffer));
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while (buffer.size() > windowSize) {
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const samples = buffer.get(buffer.head(), windowSize);
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buffer.pop(windowSize);
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vad.acceptWaveform(samples)
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if (vad.isDetected() && !printed) {
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console.log(`${index}: Detected speech`)
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printed = true;
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}
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if (!vad.isDetected()) {
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printed = false;
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}
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while (!vad.isEmpty()) {
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const segment = vad.front();
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vad.pop();
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const filename = `${index}-${
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new Date()
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.toLocaleTimeString('en-US', {hour12: false})
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.split(' ')[0]}.wav`;
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sherpa_onnx.writeWave(
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filename,
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{samples: segment.samples, sampleRate: vad.config.sampleRate});
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const duration = segment.samples.length / vad.config.sampleRate;
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console.log(`${index} End of speech. Duration: ${duration} seconds`);
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console.log(`Saved to ${filename}`);
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index += 1;
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}
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}
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});
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ai.on('close', () => {
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console.log('Free resources');
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});
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ai.start();
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console.log('Started! Please speak')
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