Loopback mode for AppRTCDemo on iOS.

webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.mm

 /*
  *  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 268 matching lines @@
 }
 
 - (void)handleCaptureSessionInterruptionEnded:(NSNotification *)notification {
   RTCLog(@"Capture session interruption ended.");
   // TODO(tkchin): Handle this case.
 }
 
 - (void)handleCaptureSessionRuntimeError:(NSNotification *)notification {
   NSError *error =
       [notification.userInfo objectForKey:AVCaptureSessionErrorKey];
-  RTCLogError(@"Capture session runtime error: %@", error.localizedDescription);
+  RTCLogError(@"Capture session runtime error: %@", error);
 
   [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
                                block:^{
 #if TARGET_OS_IPHONE
     if (error.code == AVErrorMediaServicesWereReset) {
       [self handleNonFatalError];
     } else {
       [self handleFatalError];
     }
 #else
@@ skipping 380 matching lines @@
   }
 
   OnFrame(cricket::WebRtcVideoFrame(buffer, webrtc::kVideoRotation_0,
                                     translated_camera_time_us),
           captured_width, captured_height);
 
   CVBufferRelease(image_buffer);
 }
 
 }  // namespace webrtc