noise

apps/noise.js

+lastNoise: {}
+
+function isNoisy(username) {
+    const now = +new Date()
+    const then = VideoShare.lastNoise[username] || 0
+    console.log(now - then)
+}
+
+function notifySound(stream) {
+    const audioContext = new AudioContext()
+    const analyser = audioContext.createAnalyser()
+    const microphone = audioContext.createMediaStreamSource(stream)
+    const scriptProcessor = audioContext.createScriptProcessor(0, 1, 1)
+
+    analyser.smoothingTimeConstant = 0.3
+    analyser.fftSize = 1024
+
+    microphone.connect(analyser)
+    analyser.connect(scriptProcessor)
+    scriptProcessor.connect(audioContext.destination)
+    scriptProcessor.onaudioprocess = () => {
+        const array =  new Uint8Array(analyser.frequencyBinCount)
+        analyser.getByteFrequencyData(array)
+        const isLoud = array.reduce((a, b) => a + b) / array.length | 0
+        if(isLoud) {
+            wire({kind: 'noise'})
+        }
+    }
+}
+
+function showNoise() {
+    const now = +new Date()
+    for([username, ts] of Object.entries(VideoShare.lastNoise)) {
+        const isNoisy = (now - ts) < 100
+        const query = `.label-${username}`
+        const el = document.querySelector(query)
+        if(el && isNoisy) {
+            el.style.color = 'lime'
+        }
+        else if (el) {
+            el.style.color = 'white'
+        }
+    }
+}
+
+addEventListener('noise', ({detail: {source}}) => {
+    VideoShare.lastNoise[source] = +new Date()
+})
+
+addEventListener('load', () => {
+    setInterval(showNoise, 100)
+    doNotLog.add('noise')
+})
+
+// VideoShare.notifySound(stream)