From 445f6dc6f86f145a98e5c5ae4d26d9170658d9d2 Mon Sep 17 00:00:00 2001
From: Matthew Chen <charlesmchen@gmail.com>
Date: Thu, 21 Sep 2017 16:03:30 -0400
Subject: [PATCH] Respond to CR.

// FREEBIE
---
 Signal/src/call/CallAudioService.swift | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Signal/src/call/CallAudioService.swift b/Signal/src/call/CallAudioService.swift
index 8c495adcf..4f93b457b 100644
--- a/Signal/src/call/CallAudioService.swift
+++ b/Signal/src/call/CallAudioService.swift
@@ -449,6 +449,8 @@ struct AudioSource: Hashable {
                                  mode: String? = nil,
                                  options: AVAudioSessionCategoryOptions = AVAudioSessionCategoryOptions(rawValue: 0)) {
 
+        AssertIsOnMainThread()
+
         let session = AVAudioSession.sharedInstance()
         var audioSessionChanged = false
         do {
@@ -500,7 +502,8 @@ struct AudioSource: Hashable {
 
         if audioSessionChanged {
             Logger.info("\(TAG) in \(#function)")
-            NotificationCenter.default.postNotificationNameAsync(CallAudioServiceSessionChanged, object: nil)
+            // Update call view synchronously; already on main thread.
+            NotificationCenter.default.post(name:CallAudioServiceSessionChanged, object: nil)
         }
     }
 }