@mjyc/voice-activity-detection/test/test.js

Mic input activity detection

var vad = require("../index.js");
var audioContext;

var valueContainer = document.createElement("div");
document.body.appendChild(valueContainer);

var stateContainer = document.createElement("div");
document.body.appendChild(stateContainer);

requestMic();

function requestMic() {
  try {
    window.AudioContext = window.AudioContext || window.webkitAudioContext;
    audioContext = new AudioContext();

    navigator.getUserMedia =
      navigator.getUserMedia ||
      navigator.webkitGetUserMedia ||
      navigator.mozGetUserMedia ||
      navigator.msGetUserMedia;
    navigator.getUserMedia(
      { audio: true },
      startUserMedia,
      handleMicConnectError
    );
  } catch (e) {
    handleUserMediaError();
  }
}

function handleUserMediaError() {
  console.warn("Mic input is not supported by the browser.");
}

function handleMicConnectError() {
  console.warn(
    "Could not connect microphone. Possible rejected by the user or is blocked by the browser."
  );
}

function startUserMedia(stream) {
  var options = {
    useNoiseCapture: false,
    activityCounterThresh: 10,
    activityCounterMax: 30,
    onVoiceStart: function() {
      console.log("voice start");
      stateContainer.innerHTML = "Voice state: <strong>active</strong>";
    },
    onVoiceStop: function() {
      console.log("voice stop");
      stateContainer.innerHTML = "Voice state: <strong>inactive</strong>";
    },
    onUpdate: function(val) {
      valueContainer.innerHTML =
        "Current voice activity value: <strong>" + val + "</strong>";
    },
    logger: console
  };
  vad(audioContext, stream, options);
}