Add feature flag for disabling encryption in Element Call

src/i18n/strings/en_EN.json

@@ -1398,6 +1398,7 @@
         "element_call_video_rooms": "Element Call video rooms",
         "experimental_description": "Feeling experimental? Try out our latest ideas in development. These features are not finalised; they may be unstable, may change, or may be dropped altogether. <a>Learn more</a>.",
         "experimental_section": "Early previews",
+        "feature_disable_call_per_sender_encryption": "Disable per sender encryption for element call",
         "feature_wysiwyg_composer_description": "Use rich text instead of Markdown in the message composer.",
         "group_calls": "New group call experience",
         "group_developer": "Developer",

src/models/Call.ts

@@ -661,7 +661,8 @@ export class ElementCall extends Call {
             analyticsID,
         });
 
-        if (client.isRoomEncrypted(roomId)) params.append("perParticipantE2EE", "");
+        if (client.isRoomEncrypted(roomId) && !SettingsStore.getValue("feature_disable_call_per_sender_encryption"))
+            params.append("perParticipantE2EE", "");
         if (SettingsStore.getValue("fallbackICEServerAllowed")) params.append("allowIceFallback", "");
         if (SettingsStore.getValue("feature_allow_screen_share_only_mode")) params.append("allowVoipWithNoMedia", "");
 

src/settings/Settings.tsx

@@ -404,6 +404,13 @@ export const SETTINGS: { [setting: string]: ISetting } = {
         controller: new ReloadOnChangeController(),
         default: false,
     },
+    "feature_disable_call_per_sender_encryption": {
+        isFeature: true,
+        supportedLevels: LEVELS_FEATURE,
+        labsGroup: LabGroup.VoiceAndVideo,
+        displayName: _td("labs|feature_disable_call_per_sender_encryption"),
+        default: false,
+    },
     "feature_allow_screen_share_only_mode": {
         isFeature: true,
         supportedLevels: LEVELS_DEVICE_ONLY_SETTINGS_WITH_CONFIG,