Allow for configuration of audio bitrate and frames per packet

app/index.js

@@ -114,7 +114,9 @@ class SettingsDialog {
     if (this._testVad) {
       this._testVad.end()
     }
-    this._testVad = new VADVoiceHandler(null, this.vadLevel())
+    let dummySettings = new Settings()
+    this.applyTo(dummySettings)
+    this._testVad = new VADVoiceHandler(null, dummySettings)
     this._testVad.on('started_talking', () => this.testVadActive(true))
                  .on('stopped_talking', () => this.testVadActive(false))
                  .on('level', level => this.testVadLevel(level))
@@ -162,6 +164,8 @@ class Settings {
     this.vadLevel = load('vadLevel') || 0.3
     this.toolbarVertical = load('toolbarVertical') || false
     this.showAvatars = ko.observable(load('showAvatars') || 'always')
+    this.audioBitrate = Number(load('audioBitrate')) || 40000
+    this.samplesPerPacket = Number(load('samplesPerPacket')) || 960
   }
 
   save () {
@@ -171,6 +175,8 @@ class Settings {
     save('vadLevel', this.vadLevel)
     save('toolbarVertical', this.toolbarVertical)
     save('showAvatars', this.showAvatars())
+    save('audioBitrate', this.audioBitrate)
+    save('samplesPerPacket', this.samplesPerPacket)
   }
 }
 
@@ -584,11 +590,11 @@ class GlobalBindings {
       }
       let mode = this.settings.voiceMode
       if (mode === 'cont') {
-        voiceHandler = new ContinuousVoiceHandler(this.client)
+        voiceHandler = new ContinuousVoiceHandler(this.client, this.settings)
       } else if (mode === 'ptt') {
-        voiceHandler = new PushToTalkVoiceHandler(this.client, this.settings.pttKey)
+        voiceHandler = new PushToTalkVoiceHandler(this.client, this.settings)
       } else if (mode === 'vad') {
-        voiceHandler = new VADVoiceHandler(this.client, this.settings.vadLevel)
+        voiceHandler = new VADVoiceHandler(this.client, this.settings)
       } else {
         log('Unknown voice mode:', mode)
         return
@@ -606,6 +612,11 @@ class GlobalBindings {
       if (this.selfMute()) {
         voiceHandler.setMute(true)
       }
+
+      this.client.setAudioQuality(
+        this.settings.audioBitrate,
+        this.settings.samplesPerPacket
+      )
     }
 
     this.messageBoxHint = ko.pureComputed(() => {

app/voice.js

@@ -9,9 +9,10 @@ import vad from 'voice-activity-detection'
 import DropStream from 'drop-stream'
 
 class VoiceHandler extends Writable {
-  constructor (client) {
+  constructor (client, settings) {
     super({ objectMode: true })
     this._client = client
+    this._settings = settings
     this._outbound = null
     this._mute = false
   }
@@ -47,7 +48,7 @@ class VoiceHandler extends Writable {
       })
 
       this._outbound
-        .pipe(chunker(4 * 480))
+        .pipe(chunker(4 * this._settings.samplesPerPacket))
         .pipe(buffer2Float32Array)
         .pipe(this._client.createVoiceStream())
 
@@ -71,8 +72,8 @@ class VoiceHandler extends Writable {
 }
 
 export class ContinuousVoiceHandler extends VoiceHandler {
-  constructor (client) {
+  constructor (client, settings) {
-    super(client)
+    super(client, settings)
   }
 
   _write (data, _, callback) {
@@ -85,9 +86,9 @@ export class ContinuousVoiceHandler extends VoiceHandler {
 }
 
 export class PushToTalkVoiceHandler extends VoiceHandler {
-  constructor (client, key) {
+  constructor (client, settings) {
-    super(client)
+    super(client, settings)
-    this._key = key
+    this._key = settings.pttKey
     this._pushed = false
     this._keydown_handler = () => this._pushed = true
     this._keyup_handler = () => {
@@ -114,8 +115,9 @@ export class PushToTalkVoiceHandler extends VoiceHandler {
 }
 
 export class VADVoiceHandler extends VoiceHandler {
-  constructor (client, level) {
+  constructor (client, settings) {
-    super(client)
+    super(client, settings)
+    let level = settings.vadLevel
     const self = this
     this._vad = vad(audioContext, theUserMedia, {
       onVoiceStart () {