Update AppRTCDemo UI.

- Removed log box. Debug logs still available through lldb.
- Remote video displayed in aspect fill format.
- Provide a hangup button.
- Added Default-568.png so we display properly on iPhone5+.

BUG=
R=jiayl@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/34669004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@8081 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/talk/examples/objc/AppRTCDemo/ios/ARDVideoCallViewController.m b/talk/examples/objc/AppRTCDemo/ios/ARDVideoCallViewController.m
new file mode 100644
index 0000000..352cb43
--- /dev/null
+++ b/talk/examples/objc/AppRTCDemo/ios/ARDVideoCallViewController.m
@@ -0,0 +1,163 @@
+/*
+ * libjingle
+ * Copyright 2015, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "ARDVideoCallViewController.h"
+
+#import "ARDAppClient.h"
+#import "ARDVideoCallView.h"
+
+@interface ARDVideoCallViewController () <ARDAppClientDelegate,
+    ARDVideoCallViewDelegate>
+@property(nonatomic, readonly) ARDVideoCallView *videoCallView;
+@end
+
+@implementation ARDVideoCallViewController {
+  ARDAppClient *_client;
+  RTCVideoTrack *_remoteVideoTrack;
+  RTCVideoTrack *_localVideoTrack;
+}
+
+@synthesize videoCallView = _videoCallView;
+
+- (instancetype)initForRoom:(NSString *)room {
+  if (self = [super init]) {
+    _client = [[ARDAppClient alloc] initWithDelegate:self];
+    [_client connectToRoomWithId:room options:nil];
+  }
+  return self;
+}
+
+- (void)loadView {
+  _videoCallView = [[ARDVideoCallView alloc] initWithFrame:CGRectZero];
+  _videoCallView.delegate = self;
+  _videoCallView.statusLabel.text =
+      [self statusTextForState:RTCICEConnectionNew];
+  self.view = _videoCallView;
+}
+
+#pragma mark - ARDAppClientDelegate
+
+- (void)appClient:(ARDAppClient *)client
+    didChangeState:(ARDAppClientState)state {
+  switch (state) {
+    case kARDAppClientStateConnected:
+      NSLog(@"Client connected.");
+      break;
+    case kARDAppClientStateConnecting:
+      NSLog(@"Client connecting.");
+      break;
+    case kARDAppClientStateDisconnected:
+      NSLog(@"Client disconnected.");
+      [self hangup];
+      break;
+  }
+}
+
+- (void)appClient:(ARDAppClient *)client
+    didChangeConnectionState:(RTCICEConnectionState)state {
+  NSLog(@"ICE state changed: %d", state);
+  __weak ARDVideoCallViewController *weakSelf = self;
+  dispatch_async(dispatch_get_main_queue(), ^{
+    ARDVideoCallViewController *strongSelf = weakSelf;
+    strongSelf.videoCallView.statusLabel.text =
+        [strongSelf statusTextForState:state];
+  });
+}
+
+- (void)appClient:(ARDAppClient *)client
+    didReceiveLocalVideoTrack:(RTCVideoTrack *)localVideoTrack {
+  if (!_localVideoTrack) {
+    _localVideoTrack = localVideoTrack;
+    [_localVideoTrack addRenderer:_videoCallView.localVideoView];
+  }
+}
+
+- (void)appClient:(ARDAppClient *)client
+    didReceiveRemoteVideoTrack:(RTCVideoTrack *)remoteVideoTrack {
+  if (!_remoteVideoTrack) {
+    _remoteVideoTrack = remoteVideoTrack;
+    [_remoteVideoTrack addRenderer:_videoCallView.remoteVideoView];
+    _videoCallView.statusLabel.hidden = YES;
+  }
+}
+
+- (void)appClient:(ARDAppClient *)client
+         didError:(NSError *)error {
+  NSString *message =
+      [NSString stringWithFormat:@"%@", error.localizedDescription];
+  [self showAlertWithMessage:message];
+  [self hangup];
+}
+
+#pragma mark - ARDVideoCallViewDelegate
+
+- (void)videoCallViewDidHangup:(ARDVideoCallView *)view {
+  [self hangup];
+}
+
+#pragma mark - Private
+
+- (void)hangup {
+  if (_remoteVideoTrack) {
+    [_remoteVideoTrack removeRenderer:_videoCallView.remoteVideoView];
+    _remoteVideoTrack = nil;
+    [_videoCallView.remoteVideoView renderFrame:nil];
+  }
+  if (_localVideoTrack) {
+    [_localVideoTrack removeRenderer:_videoCallView.localVideoView];
+    _localVideoTrack = nil;
+    [_videoCallView.localVideoView renderFrame:nil];
+  }
+  [_client disconnect];
+  [self.presentingViewController dismissViewControllerAnimated:YES
+                                                    completion:nil];
+}
+
+- (NSString *)statusTextForState:(RTCICEConnectionState)state {
+  switch (state) {
+    case RTCICEConnectionNew:
+    case RTCICEConnectionChecking:
+      return @"Connecting...";
+    case RTCICEConnectionConnected:
+    case RTCICEConnectionCompleted:
+    case RTCICEConnectionFailed:
+    case RTCICEConnectionDisconnected:
+    case RTCICEConnectionClosed:
+      return nil;
+  }
+}
+
+- (void)showAlertWithMessage:(NSString*)message {
+  UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:nil
+                                                      message:message
+                                                     delegate:nil
+                                            cancelButtonTitle:@"OK"
+                                            otherButtonTitles:nil];
+  [alertView show];
+}
+
+@end