Preload media devices to avoid later delay

Co-authored-by: ayumi yu <ayumi@signal.org>

app/main.ts

@@ -2653,6 +2653,15 @@ async function ensureFilePermissions(onlyFiles?: Array<string>) {
   getLogger().info(`Finish ensuring permissions in ${Date.now() - start}ms`);
 }
 
+ipc.handle('get-media-access-status', async (_event, value) => {
+  // This function is not supported on Linux
+  if (!systemPreferences.getMediaAccessStatus) {
+    return undefined;
+  }
+
+  return systemPreferences.getMediaAccessStatus(value);
+});
+
 ipc.handle('get-auto-launch', async () => {
   return app.getLoginItemSettings(await getDefaultLoginItemSettings())
     .openAtLogin;

ts/services/calling.ts

@@ -383,6 +383,10 @@ export class CallingClass {
     });
 
     void this.cleanExpiredGroupCallRingsAndLoop();
+
+    if (process.platform === 'darwin') {
+      drop(this.enumerateMediaDevices());
+    }
   }
 
   private attemptToGiveOurServiceIdToRingRtc(): void {
@@ -2433,6 +2437,23 @@ export class CallingClass {
       void this.cleanExpiredGroupCallRingsAndLoop();
     }, CLEAN_EXPIRED_GROUP_CALL_RINGS_INTERVAL);
   }
+
+  // MacOS: Preload devices to work around delay when first entering call lobby
+  // https://bugs.chromium.org/p/chromium/issues/detail?id=1287628
+  private async enumerateMediaDevices(): Promise<void> {
+    try {
+      const microphoneStatus = await window.IPC.getMediaAccessStatus(
+        'microphone'
+      );
+      if (microphoneStatus !== 'granted') {
+        return;
+      }
+
+      drop(window.navigator.mediaDevices.enumerateDevices());
+    } catch (error) {
+      log.error('enumerateMediaDevices failed:', Errors.toLogFormat(error));
+    }
+  }
 }
 
 export const calling = new CallingClass();

ts/util/createIPCEvents.ts

@@ -108,6 +108,9 @@ export type IPCEventsCallbacksType = {
   deleteAllMyStories: () => Promise<void>;
   editCustomColor: (colorId: string, customColor: CustomColorType) => void;
   getConversationsWithCustomColor: (x: string) => Array<ConversationType>;
+  getMediaAccessStatus: (
+    mediaType: 'screen' | 'microphone' | 'camera'
+  ) => Promise<string | unknown>;
   installStickerPack: (packId: string, key: string) => Promise<void>;
   isFormattingFlagEnabled: () => boolean;
   isPhoneNumberSharingEnabled: () => boolean;
@@ -609,6 +612,11 @@ export function createIPCEvents(
       showWhatsNewModal();
     },
 
+    getMediaAccessStatus: async (
+      mediaType: 'screen' | 'microphone' | 'camera'
+    ) => {
+      return window.IPC.getMediaAccessStatus(mediaType);
+    },
     getMediaPermissions: window.IPC.getMediaPermissions,
     getMediaCameraPermissions: window.IPC.getMediaCameraPermissions,
 

ts/window.d.ts

@@ -66,6 +66,9 @@ export type IPCType = {
   };
   drawAttention: () => void;
   getAutoLaunch: () => Promise<boolean>;
+  getMediaAccessStatus: (
+    mediaType: 'screen' | 'microphone' | 'camera'
+  ) => Promise<string | undefined>;
   getMediaCameraPermissions: () => Promise<boolean>;
   getMediaPermissions: () => Promise<boolean>;
   logAppLoadedEvent?: (options: { processedCount?: number }) => void;

ts/windows/main/phase1-ipc.ts

@@ -86,6 +86,8 @@ const IPC: IPCType = {
     ipc.send('draw-attention');
   },
   getAutoLaunch: () => ipc.invoke('get-auto-launch'),
+  getMediaAccessStatus: mediaType =>
+    ipc.invoke('get-media-access-status', mediaType),
   getMediaPermissions: () => ipc.invoke('settings:get:mediaPermissions'),
   getMediaCameraPermissions: () =>
     ipc.invoke('settings:get:mediaCameraPermissions'),