From bd9afc78632bf63a7f705548e3a09148a1f860f8 Mon Sep 17 00:00:00 2001
From: gornvan <grobelvan@gmail.com>
Date: Wed, 9 Oct 2024 21:21:10 +0200
Subject: [PATCH] Define and implement mic-tester tool

---
 src/tools/mic-tester/index.ts       |  12 +++
 src/tools/mic-tester/mic-tester.vue | 121 ++++++++++++++++++++++++++++
 2 files changed, 133 insertions(+)
 create mode 100644 src/tools/mic-tester/index.ts
 create mode 100644 src/tools/mic-tester/mic-tester.vue

diff --git a/src/tools/mic-tester/index.ts b/src/tools/mic-tester/index.ts
new file mode 100644
index 00000000..725e9f2c
--- /dev/null
+++ b/src/tools/mic-tester/index.ts
@@ -0,0 +1,12 @@
+import { Microphone } from '@vicons/tabler';
+import { defineTool } from '../tool';
+import { translate } from '@/plugins/i18n.plugin';
+
+export const tool = defineTool({
+  name: translate('tools.mic-tester.title'),
+  path: '/mic-tester',
+  description: translate('tools.mic-tester.description'),
+  keywords: ['mic', 'microphone', 'test', 'check', 'troubleshoot', 'sound'],
+  component: () => import('./mic-tester.vue'),
+  icon: Microphone,
+});
diff --git a/src/tools/mic-tester/mic-tester.vue b/src/tools/mic-tester/mic-tester.vue
new file mode 100644
index 00000000..6bbda911
--- /dev/null
+++ b/src/tools/mic-tester/mic-tester.vue
@@ -0,0 +1,121 @@
+<script setup lang="ts">
+import { ref, onBeforeUnmount } from 'vue';
+import { useI18n } from 'vue-i18n';
+import { Microphone } from '@vicons/tabler';
+const { t } = useI18n();
+
+// Audio-related variables
+let audioContext: AudioContext | null = null;
+let delayNode: DelayNode | null = null;
+let sourceNode: MediaStreamAudioSourceNode | null = null;
+let analyserNode: AnalyserNode | null = null;
+let stream: MediaStream | null = null;
+
+const isPlaying = ref(false);
+const loudnessBarWidth = ref(0);
+
+const startMicReplayAndLoudMeter = async () => {
+  if (!audioContext) {
+    audioContext = new (window.AudioContext || window.webkitAudioContext)();
+  }
+
+  try {
+    stream = await navigator.mediaDevices.getUserMedia({ audio: true });
+  } catch (err) {
+    console.error('Microphone access denied:', err);
+    alert('Microphone access denied (the error is also in the console):', err);
+    return;
+  }
+
+  sourceNode = audioContext.createMediaStreamSource(stream);
+  delayNode = audioContext.createDelay(1.0);
+  delayNode.delayTime.value = 1.0;
+
+  analyserNode = audioContext.createAnalyser();
+  analyserNode.fftSize = 256;
+
+  // Connect nodes: mic -> delay -> speakers
+  sourceNode.connect(delayNode);
+  delayNode.connect(audioContext.destination);
+  sourceNode.connect(analyserNode);
+
+  isPlaying.value = true;
+  measureLoudness();
+};
+
+const stopMicReplayAndLoudMeter = () => {
+  if (audioContext && stream) {
+    const tracks = stream.getTracks();
+    tracks.forEach(track => track.stop());
+    audioContext.close();
+    audioContext = null;
+    isPlaying.value = false;
+    loudnessBarWidth.value = 0;
+  }
+};
+
+// Measure loudness and update loudness bar
+const measureLoudness = () => {
+  const dataArray = new Uint8Array(analyserNode!.frequencyBinCount);
+
+  const updateLoudness = () => {
+    analyserNode!.getByteFrequencyData(dataArray);
+
+    // Calculate average loudness
+    let sum = 0;
+    dataArray.forEach(value => sum += value);
+    const average = sum / dataArray.length;
+
+    // Update loudness bar width based on loudness level
+    loudnessBarWidth.value = average;
+
+    if (isPlaying.value) {
+      requestAnimationFrame(updateLoudness);
+    }
+  };
+
+  updateLoudness();
+};
+
+// Cleanup on component unmount
+onBeforeUnmount(() => {
+  stopMicReplay();
+});
+</script>
+
+<template>
+  <div>
+    <c-card>
+      <div class="control-buttons">
+        <c-button @click="startMicReplayAndLoudMeter" :disabled="isPlaying">{{ t('tools.mic-tester.start-button-text') }}</c-button>
+        <c-button @click="stopMicReplayAndLoudMeter" :disabled="!isPlaying">{{ t('tools.mic-tester.stop-button-text') }}</c-button>
+      </div>
+
+      <!-- Loudness Meter -->
+      <div id="loudnessMeter">
+        <div id="loudnessBar" :style="{ width: loudnessBarWidth + '%' }"></div>
+      </div>
+    </c-card>
+  </div>
+</template>
+
+<style scoped>
+#loudnessMeter {
+  width: 100%;
+  height: 30px;
+  background-color: rgba(46, 51, 56, 0.05);
+  margin-top: 20px;
+  position: relative;
+}
+#loudnessBar {
+  height: 100%;
+  background: linear-gradient(48deg, rgba(37, 99, 108, 1) 0%, rgba(59, 149, 111, 1) 60%, rgba(20, 160, 88, 1) 100%);
+}
+.control-buttons {
+  display: flex;
+  gap: 10px;
+  margin-bottom: 20px;
+  justify-content: space-between;
+}
+</style>
+