Sravan/BizGaze_Remote
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Outgoing iOS screen-share via ReplayKit broadcast extension

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Lets a native-call user share their iPhone screen (whole device, works
backgrounded). LiveKit 2.15.3 ships the broadcast stack (BroadcastManager +
LKSampleHandler + IPC), so:

- New Broadcast Upload Extension target "BroadcastExtension"
  (com.bizgaze.connect.broadcast): SampleHandler.swift subclasses
  LKSampleHandler; injected by mobile/scripts/add-broadcast-extension.rb
  which also LINKS the LiveKit SPM product into the extension + sets the
  App Group. Sources in mobile/ios-broadcast/.
- Plugin: Room created with ScreenShareCaptureOptions(useBroadcastExtension:
  true); startScreenShare -> BroadcastManager.requestActivation() (system
  picker); stopScreenShare -> requestStop(); BroadcastManagerDelegate ->
  fires screenShareState to the web. LiveKit auto-publishes the track.
- ios-patch.sh: RTCScreenSharingExtension + RTCAppGroupIdentifier keys.
- codemagic.yaml: run the injector + sign the 3rd bundle id (.broadcast).
- home.html: toggleScreen native -> start/stop; screenShareState listener
  reflects state + broadcasts meeting-screen so peers' stage shows it.

REQUIRES a one-time manual Apple portal step: enable the App Group on the
com.bizgaze.connect.broadcast App ID (see mobile/IOS_SETUP.md) or the
archive fails code-signing. SPM-linked extension is new on our CI — expect
build iteration. Web deployed (no-ops on builds without startScreenShare).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Sravan
2026-08-06 21:09:02 +05:30
parent aed3d22675
commit 27c582bceb
9 changed files with 259 additions and 3 deletions
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mobile/scripts/ios-patch.sh
+8
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@@ -91,6 +91,14 @@ fi
"$PB" -c "Add :aps-environment string production" "$ENT" 2>/dev/null || "$PB" -c "Set :aps-environment production" "$ENT"
echo "Entitlements: aps-environment=production ensured in $ENT"
# ── Screen sharing from iOS (ReplayKit broadcast extension + LiveKit) ───────────────────────────────
# LiveKit's BroadcastManager finds the broadcast upload extension + the shared App Group via these two keys
# (BroadcastBundleInfo reads RTCScreenSharingExtension / RTCAppGroupIdentifier). They match the extension
# added by add-broadcast-extension.rb (bundle id <app>.broadcast) and the App Group used by the share
# extension. Set explicitly so there's no reliance on the default-derivation.
set_str RTCScreenSharingExtension "com.bizgaze.connect.broadcast"
set_str RTCAppGroupIdentifier "group.com.bizgaze.connect"
# We use only standard encryption (HTTPS/TLS), which is exempt — declaring this up front stops App Store
# Connect from asking the "export compliance" question on every single build/TestFlight upload.
"$PB" -c "Add :ITSAppUsesNonExemptEncryption bool false" "$PLIST" 2>/dev/null \