Loopback mode for AppRTCDemo on iOS.

webrtc/examples/objc/AppRTCDemo/ios/ARDMainViewController.m

 /*
  *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 14 matching lines @@
   self.view = mainView;
 }
 
 - (void)applicationWillResignActive:(UIApplication *)application {
   // Terminate any calls when we aren't active.
   [self dismissViewControllerAnimated:NO completion:nil];
 }
 
 #pragma mark - ARDMainViewDelegate
 
-- (void)mainView:(ARDMainView *)mainView didInputRoom:(NSString *)room {
+- (void)mainView:(ARDMainView *)mainView
+    didInputRoom:(NSString *)room
+      isLoopback:(BOOL)isLoopback
+     isAudioOnly:(BOOL)isAudioOnly {
   if (!room.length) {
+    [self showAlertWithMessage:@"Missing room name."];
     return;
   }
   // Trim whitespaces.
   NSCharacterSet *whitespaceSet = [NSCharacterSet whitespaceCharacterSet];
   NSString *trimmedRoom = [room stringByTrimmingCharactersInSet:whitespaceSet];
 
   // Check that room name is valid.
   NSError *error = nil;
   NSRegularExpressionOptions options = NSRegularExpressionCaseInsensitive;
   NSRegularExpression *regex =
       [NSRegularExpression regularExpressionWithPattern:@"\\w+"
                                                 options:options
                                                   error:&error];
   if (error) {
     [self showAlertWithMessage:error.localizedDescription];
     return;
   }
   NSRange matchRange =
       [regex rangeOfFirstMatchInString:trimmedRoom
                                options:0
                                  range:NSMakeRange(0, trimmedRoom.length)];
   if (matchRange.location == NSNotFound ||
       matchRange.length != trimmedRoom.length) {
     [self showAlertWithMessage:@"Invalid room name."];
     return;
   }
 
   // Kick off the video call.
   ARDVideoCallViewController *videoCallViewController =
-      [[ARDVideoCallViewController alloc] initForRoom:trimmedRoom];
+      [[ARDVideoCallViewController alloc] initForRoom:trimmedRoom
+                                           isLoopback:isLoopback
+                                          isAudioOnly:isAudioOnly];
   videoCallViewController.modalTransitionStyle =
       UIModalTransitionStyleCrossDissolve;
   [self presentViewController:videoCallViewController
                      animated:YES
                    completion:nil];
 }
 
 #pragma mark - Private
 
 - (void)showAlertWithMessage:(NSString*)message {
   UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:nil
                                                       message:message
                                                      delegate:nil
                                             cancelButtonTitle:@"OK"
                                             otherButtonTitles:nil];
   [alertView show];
 }
 
 @end