Make camera unavailable if using earpice mode (#3351)

src/MediaDevicesContext.ts

@@ -23,6 +23,14 @@ export function useMediaDevices(): MediaDevices {
   return mediaDevices;
 }
 
+export const useIsEarpiece = (): boolean => {
+  const devices = useMediaDevices();
+  const audioOutput = useObservableEagerState(devices.audioOutput.selected$);
+  const available = useObservableEagerState(devices.audioOutput.available$);
+  if (!audioOutput?.id) return false;
+  return available.get(audioOutput.id)?.type === "earpiece";
+};
+
 /**
  * A convenience hook to get the audio node configuration for the earpiece.
  * It will check the `useAsEarpiece` of the `audioOutput` device and return
@@ -36,17 +44,13 @@ export const useEarpieceAudioConfig = (): {
 } => {
   const devices = useMediaDevices();
   const audioOutput = useObservableEagerState(devices.audioOutput.selected$);
-  // We use only the right speaker (pan = 1) for the earpiece.
-  // This mimics the behavior of the native earpiece speaker (only the top speaker on an iPhone)
-  const pan = useMemo(
-    () => (audioOutput?.virtualEarpiece ? 1 : 0),
-    [audioOutput?.virtualEarpiece],
-  );
-  // We also do lower the volume by a factor of 10 to optimize for the usecase where
-  // a user is holding the phone to their ear.
-  const volume = useMemo(
-    () => (audioOutput?.virtualEarpiece ? 0.1 : 1),
-    [audioOutput?.virtualEarpiece],
-  );
-  return { pan, volume };
+  const isVirtualEarpiece = audioOutput?.virtualEarpiece ?? false;
+  return {
+    // We use only the right speaker (pan = 1) for the earpiece.
+    // This mimics the behavior of the native earpiece speaker (only the top speaker on an iPhone)
+    pan: useMemo(() => (isVirtualEarpiece ? 1 : 0), [isVirtualEarpiece]),
+    // We also do lower the volume by a factor of 10 to optimize for the usecase where
+    // a user is holding the phone to their ear.
+    volume: useMemo(() => (isVirtualEarpiece ? 0.1 : 1), [isVirtualEarpiece]),
+  };
 };

src/room/MuteStates.ts

@@ -21,7 +21,7 @@ import {
   type SelectedDevice,
   type MediaDevice,
 } from "../state/MediaDevices";
-import { useMediaDevices } from "../MediaDevicesContext";
+import { useIsEarpiece, useMediaDevices } from "../MediaDevicesContext";
 import { useReactiveState } from "../useReactiveState";
 import { ElementWidgetActions, widget } from "../widget";
 import { Config } from "../config/Config";
@@ -58,6 +58,7 @@ export interface MuteStates {
 function useMuteState(
   device: MediaDevice<DeviceLabel, SelectedDevice>,
   enabledByDefault: () => boolean,
+  forceUnavailable: boolean = false,
 ): MuteState {
   const available = useObservableEagerState(device.available$);
   const [enabled, setEnabled] = useReactiveState<boolean | undefined>(
@@ -67,13 +68,13 @@ function useMuteState(
   );
   return useMemo(
     () =>
-      available.size === 0
+      available.size === 0 || forceUnavailable
         ? deviceUnavailable
         : {
             enabled: enabled ?? false,
             setEnabled: setEnabled as Dispatch<SetStateAction<boolean>>,
           },
-    [available.size, enabled, setEnabled],
+    [available.size, enabled, forceUnavailable, setEnabled],
   );
 }
 
@@ -85,9 +86,11 @@ export function useMuteStates(isJoined: boolean): MuteStates {
   const audio = useMuteState(devices.audioInput, () => {
     return Config.get().media_devices.enable_audio && !skipLobby && !isJoined;
   });
+  const isEarpiece = useIsEarpiece();
   const video = useMuteState(
     devices.videoInput,
     () => Config.get().media_devices.enable_video && !skipLobby && !isJoined,
+    isEarpiece, // Force video to be unavailable if using earpiece
   );
 
   useEffect(() => {