ericyd · ericyd · Dec 8, 2022 · Dec 8, 2022
diff --git a/src/App/index.tsx b/src/App/index.tsx
@@ -4,8 +4,9 @@ import { useKeybindings } from '../hooks/use-keybindings'
 import { KeyboardBindingsList } from './KeyboardBindingsList'
 
 type Props = {
-  stream: MediaStream
+  defaultDeviceId: string
   audioContext: AudioContext
+  devices: MediaDeviceInfo[]
 }
 
 function App(props: Props) {

diff --git a/src/AudioProvider/index.tsx b/src/AudioProvider/index.tsx
@@ -7,14 +7,16 @@ import React, { createContext, useContext } from 'react'
 
 type AudioAdapter = {
   audioContext: AudioContext
-  stream: MediaStream
+  defaultDeviceId: string
+  devices: MediaDeviceInfo[]
 }
 
 const AudioRouter = createContext<AudioAdapter | null>(null)
 
 type Props = {
-  stream: MediaStream
+  defaultDeviceId: string
   audioContext: AudioContext
+  devices: MediaDeviceInfo[]
   children: React.ReactNode
 }
 

diff --git a/src/Start/index.tsx b/src/Start/index.tsx
@@ -17,11 +17,13 @@
  */
 import { useEffect, useState } from 'react'
 import App from '../App'
+import { deviceIdFromStream } from '../util/device-id-from-stream'
 import { logger } from '../util/logger'
 
 export const Start: React.FC = () => {
-  const [stream, setStream] = useState<MediaStream>()
+  const [defaultDeviceId, setDefaultDeviceId] = useState<string | null>(null)
   const [audioContext, setAudioContext] = useState<AudioContext>()
+  const [devices, setDevices] = useState<MediaDeviceInfo[] | null>(null)
   const [latencySupported, setLatencySupported] = useState(true)
 
   useEffect(() => {
@@ -33,27 +35,48 @@ export const Start: React.FC = () => {
     }
   }, [])
 
-  async function handleClick() {
+  async function grantDevicePermission() {
+    try {
+      const stream = await navigator.mediaDevices.getUserMedia({
+        // see src/Track/controls/SelectInput.tsx for related note
+        audio: {
+          echoCancellation: false,
+          autoGainControl: false,
+          noiseSuppression: false,
+          suppressLocalAudioPlayback: false,
+          latency: 0,
+        },
+        video: false,
+      })
+      setDefaultDeviceId(deviceIdFromStream(stream) ?? null)
+    } catch (e) {
+      alert(
+        'big, terrible error occurred and there is no coming back from that 😿'
+      )
+      logger.error({ e, message: 'Error getting user media' })
+    }
+  }
+
+  async function enumerateDevices() {
     try {
-      setStream(
-        await navigator.mediaDevices.getUserMedia({
-          audio: true,
-          // audio: {
-          //   echoCancellation: true,
-          //   autoGainControl: false,
-          //   noiseSuppression: true,
-          //   latency: 0,
-          // },
-          video: false,
-        })
+      const devices = await navigator.mediaDevices.enumerateDevices()
+      const audioDevices = devices.filter(
+        (device) => device.kind === 'audioinput'
       )
+      if (audioDevices.length === 0) {
+        logger.error({ devices })
+        throw new Error('No audio devices found')
+      }
+      setDevices(audioDevices)
     } catch (e) {
       alert(
         'big, terrible error occurred and there is no coming back from that 😿'
       )
-      logger.error(e, 'Error getting user media')
+      logger.error({ e, message: 'Error getting user devices' })
     }
+  }
 
+  async function initializeAudioContext() {
     const workletUrl = new URL('../workers/recorder', import.meta.url)
     try {
       const audioContext = new AudioContext()
@@ -71,8 +94,20 @@ export const Start: React.FC = () => {
     }
   }
 
-  return stream && audioContext ? (
-    <App stream={stream} audioContext={audioContext} />
+  async function handleClick() {
+    await Promise.all([
+      grantDevicePermission(),
+      enumerateDevices(),
+      initializeAudioContext(),
+    ])
+  }
+
+  return defaultDeviceId && audioContext && devices?.length ? (
+    <App
+      defaultDeviceId={defaultDeviceId}
+      audioContext={audioContext}
+      devices={devices}
+    />
   ) : (
     <>
       <div className="flex flex-col items-center justify-center mx-auto">

diff --git a/src/Track/controls/SelectInput.tsx b/src/Track/controls/SelectInput.tsx
@@ -1,55 +1,68 @@
-import { useEffect, useState } from 'react'
+import { useCallback, useEffect, useState } from 'react'
 import { logger } from '../../util/logger'
 import { deviceIdFromStream } from '../../util/device-id-from-stream'
+import { useAudioContext } from '../../AudioProvider'
 
 type Props = {
-  defaultDeviceId: string
   setStream(stream: MediaStream): void
 }
 
-export function SelectInput(props: Props) {
-  const [inputs, setInputs] = useState<MediaDeviceInfo[]>([])
-  const [selected, setSelected] = useState(props.defaultDeviceId)
+export function SelectInput({ setStream }: Props) {
+  const { devices, defaultDeviceId } = useAudioContext()
+  const [selected, setSelected] = useState(defaultDeviceId)
 
-  useEffect(() => {
-    async function getInputs() {
-      const devices = await navigator.mediaDevices.enumerateDevices()
-      const audioInputs = devices.filter(
-        (device) => device.kind === 'audioinput'
-      )
-      logger.debug({ audioInputs })
-      setInputs(audioInputs)
-    }
+  const setStreamByDeviceId = useCallback(
+    async (id: string) => {
+      try {
+        const stream = await navigator.mediaDevices.getUserMedia({
+          audio: {
+            deviceId: id,
 
-    getInputs()
-  }, [])
+            // for some reason,
+            // having these defined makes a HUGE difference in the recording quality.
+            // Without these defined, the audio will pulse in and out, but with these defined, it sounds great
+            echoCancellation: false,
+            autoGainControl: false,
+            noiseSuppression: false,
+            suppressLocalAudioPlayback: false,
+            latency: 0,
+          },
+          video: false,
+        })
+        setStream(stream)
+        setSelected(deviceIdFromStream(stream) ?? '')
+      } catch (e) {
+        alert('oh no, you broke it 😿')
+        logger.error({
+          e,
+          id,
+          message: 'Failed to create stream from selected device',
+        })
+      }
+    },
+    [setStream]
+  )
 
   const handleChange: React.ChangeEventHandler<HTMLSelectElement> = async (
     event
   ) => {
-    try {
-      const stream = await navigator.mediaDevices.getUserMedia({
-        audio: { deviceId: event.target.value },
-        video: false,
-      })
-      props.setStream(stream)
-      setSelected(deviceIdFromStream(stream) ?? '')
-    } catch (e) {
-      alert('oh no, you broke it 😿')
-      console.error(e)
-    }
+    return setStreamByDeviceId(event.target.value)
   }
 
+  useEffect(() => {
+    setStreamByDeviceId(defaultDeviceId)
+  }, [setStreamByDeviceId, defaultDeviceId])
+
   return (
     <select
       className="rounded-full bg-white border border-zinc-400 px-2 max-w-[50%] text-xs"
       onChange={handleChange}
       value={selected}
     >
-      {inputs.map((input) => (
-        <option key={JSON.stringify(input)} value={input.deviceId}>
+      {devices.map((device) => (
+        <option key={JSON.stringify(device)} value={device.deviceId}>
           {/* Chrome appends a weird hex ID to some inputs */}
-          {input.label.replace(/\([a-z0-9]+:[a-z0-9]+\)/, '')}
+          {device.label.replace(/\([a-z0-9]+:[a-z0-9]+\)/, '')}
         </option>
       ))}
     </select>

diff --git a/src/Track/index.tsx b/src/Track/index.tsx
@@ -30,7 +30,6 @@ import { Mute } from './controls/Mute'
 import { RemoveTrack } from './controls/RemoveTrack'
 import { Waveform } from './Waveform'
 import { SelectInput } from './controls/SelectInput'
-import { deviceIdFromStream } from '../util/device-id-from-stream'
 import type {
   ExportWavWorkerEvent,
   WavBlobControllerEvent,
@@ -84,9 +83,9 @@ export const Track: React.FC<Props> = ({
   selected,
   exportTarget,
 }) => {
-  const { audioContext, stream: defaultStream } = useAudioContext()
-  const [stream, setStream] = useState(defaultStream)
-  const defaultDeviceId = deviceIdFromStream(defaultStream) ?? ''
+  const { audioContext } = useAudioContext()
+  // stream is initialized in SelectInput
+  const [stream, setStream] = useState<MediaStream | null>(null)
 
   // title is mostly display-only, but also defines the file name when downloading files
   const [title, setTitle] = useState(`Track ${id}`)
@@ -229,6 +228,9 @@ export const Track: React.FC<Props> = ({
    * Initialize the recorder worklet, and connect the audio graph for eventual playback.
    */
   useEffect(() => {
+    if (!stream) {
+      return
+    }
     const mediaSource = audioContext.createMediaStreamSource(stream)
     const recordingProperties: RecordingProperties = {
       numberOfChannels: mediaSource.channelCount,
@@ -424,10 +426,7 @@ export const Track: React.FC<Props> = ({
           {/* Remove */}
           <div className="flex items-stretch content-center justify-between">
             <RemoveTrack onRemove={onRemove} />
-            <SelectInput
-              setStream={setStream}
-              defaultDeviceId={defaultDeviceId}
-            />
+            <SelectInput setStream={setStream} />
           </div>
         </div>