add change audio button with callback on ios

docs/controls.md

@@ -17,3 +17,5 @@ These functions must be used in conjunction with the `controlledOutput` URL para
 - `controls.onOutputDeviceSelect: ((id: string) => void) | undefined` Callback called whenever the user or application selects a new audio output.
 - `controls.setOutputDevice(id: string): void` Sets the selected audio device in EC menu. This should be used if the os decides to automatically switch to bluetooth.
 - `controls.setOutputEnabled(enabled: boolean)` Enables/disables all audio output from the application. This can be useful for temporarily pausing audio while the controlling application is switching output devices. Output is enabled by default.
+- `showNativeOutputDevicePicker: () => void`. This callback will be code by the webview if the user presses the output button in the settings menu.
+  This button is only shown on ios. (`userAgent.includes("IPhone")`)

locales/en/app.json

@@ -173,6 +173,7 @@
     "devices": {
       "camera": "Camera",
       "camera_numbered": "Camera {{n}}",
+      "change_device_button": "Change audio device",
       "default": "Default",
       "default_named": "Default <2>({{name}})</2>",
       "earpiece": "Earpiece",

src/controls.ts

@@ -15,6 +15,7 @@ export interface Controls {
   setOutputDevice(id: string): void;
   onOutputDeviceSelect?: (id: string) => void;
   setOutputEnabled(enabled: boolean): void;
+  showNativeOutputDevicePicker?: () => void;
 }
 
 export interface OutputDevice {

src/livekit/MediaDevicesContext.tsx

@@ -77,6 +77,22 @@ export interface MediaDevices extends Omit<InputDevices, "usingNames"> {
   audioOutput: MediaDeviceHandle;
 }
 
+/**
+ * An observable that represents if we should display the devices menu for iOS.
+ * This implies the following
+ *  - hide any input devices (they do not work anyhow on ios)
+ *  - Show a button to show the native output picker instead.
+ *  - Only show the earpice toggle option if the earpiece is available:
+ *   `setAvailableOutputDevices$.includes((d)=>d.forEarpiece)`
+ */
+export const iosDeviceMenu$ = alwaysShowIphoneEarpieceSetting.value$.pipe(
+  startWith(
+    alwaysShowIphoneEarpieceSetting.getValue() ||
+      navigator.userAgent.includes("iPhone"),
+  ),
+  map((v) => v || navigator.userAgent.includes("iPhone")),
+);
+
 function useSelectedId(
   available: Map<string, DeviceLabel>,
   preferredId: string | undefined,
@@ -304,37 +320,32 @@ export const MediaDevicesProvider: FC<Props> = ({ children }) => {
 };
 
 function useControlledOutput(): MediaDeviceHandle {
-  const { available, physicalDeviceForEarpiceMode } = useObservableEagerState(
+  const { available, deviceForEarpiece: physicalDeviceForEarpiceMode } =
+    useObservableEagerState(
       useObservable(() => {
-      const showEarpice$ = alwaysShowIphoneEarpieceSetting.value$.pipe(
-        startWith(alwaysShowIphoneEarpieceSetting.getValue()),
-        map((v) => v || navigator.userAgent.includes("iPhone")),
-      );
         const outputDeviceData$ = setAvailableOutputDevices$.pipe(
           startWith<OutputDevice[]>([]),
           map((devices) => {
-          const physicalDeviceForEarpiceMode = devices.find(
+            const deviceForEarpiece = devices.find((d) => d.forEarpiece);
-            (d) => d.forEarpiece,
-          );
             return {
               devicesMap: new Map<string, DeviceLabel>(
                 devices.map(({ id, name }) => [id, { type: "name", name }]),
               ),
-            physicalDeviceForEarpiceMode,
+              deviceForEarpiece,
             };
           }),
         );
 
-      return combineLatest([outputDeviceData$, showEarpice$]).pipe(
+        return combineLatest([outputDeviceData$, iosDeviceMenu$]).pipe(
-        map(([{ devicesMap, physicalDeviceForEarpiceMode }, showEarpiece]) => {
+          map(([{ devicesMap, deviceForEarpiece }, iosShowEarpiece]) => {
             let available = devicesMap;
-          if (showEarpiece && !!physicalDeviceForEarpiceMode) {
+            if (iosShowEarpiece && !!deviceForEarpiece) {
               available = new Map([
                 ...devicesMap.entries(),
                 [EARPIECE_CONFIG_ID, { type: "earpiece" }],
               ]);
             }
-          return { available, physicalDeviceForEarpiceMode };
+            return { available, deviceForEarpiece };
           }),
         );
       }),

src/settings/SettingsModal.tsx

@@ -8,8 +8,9 @@ Please see LICENSE in the repository root for full details.
 import { type FC, type ReactNode, useState } from "react";
 import { useTranslation } from "react-i18next";
 import { type MatrixClient } from "matrix-js-sdk";
-import { Root as Form, Separator } from "@vector-im/compound-web";
+import { Button, Root as Form, Separator } from "@vector-im/compound-web";
 import { type Room as LivekitRoom } from "livekit-client";
+import { useObservableEagerState } from "observable-hooks";
 
 import { Modal } from "../Modal";
 import styles from "./SettingsModal.module.css";
@@ -19,6 +20,7 @@ import { FeedbackSettingsTab } from "./FeedbackSettingsTab";
 import {
   useMediaDevices,
   useMediaDeviceNames,
+  iosDeviceMenu$,
 } from "../livekit/MediaDevicesContext";
 import { widget } from "../widget";
 import {
@@ -101,6 +103,7 @@ export const SettingsModal: FC<Props> = ({
   const [showDeveloperSettingsTab] = useSetting(developerMode);
 
   const { available: isRageshakeAvailable } = useSubmitRageshake();
+  const iosDeviceMenu = useObservableEagerState(iosDeviceMenu$);
 
   const audioTab: Tab<SettingsTab> = {
     key: "audio",
@@ -108,6 +111,7 @@ export const SettingsModal: FC<Props> = ({
     content: (
       <>
         <Form>
+          {!iosDeviceMenu && (
             <DeviceSelection
               device={devices.audioInput}
               title={t("settings.devices.microphone")}
@@ -115,6 +119,17 @@ export const SettingsModal: FC<Props> = ({
                 t("settings.devices.microphone_numbered", { n })
               }
             />
+          )}
+          {iosDeviceMenu && (
+            <Button
+              kind="secondary"
+              onClick={(): void => {
+                window.controls.showNativeOutputDevicePicker?.();
+              }}
+            >
+              {t("settings.devices.change_device_button")}
+            </Button>
+          )}
           <DeviceSelection
             device={devices.audioOutput}
             title={t("settings.devices.speaker")}