AppRTCDemo file logging.

talk/examples/objc/AppRTCDemo/common/ARDLogging.h

Index: talk/examples/objc/AppRTCDemo/common/ARDLogging.h
diff --git a/talk/examples/objc/AppRTCDemo/ARDSDPUtils.h b/talk/examples/objc/AppRTCDemo/common/ARDLogging.h
similarity index 60%
copy from talk/examples/objc/AppRTCDemo/ARDSDPUtils.h
copy to talk/examples/objc/AppRTCDemo/common/ARDLogging.h
index 2f14e6dec0b40b77b1f6d03be0ef639387b4d0db..32955d57e8e45b7c01981ded98f39d4e1cd730a2 100644
--- a/talk/examples/objc/AppRTCDemo/ARDSDPUtils.h
+++ b/talk/examples/objc/AppRTCDemo/common/ARDLogging.h
@@ -27,15 +27,28 @@
 
 #import <Foundation/Foundation.h>
 
-@class RTCSessionDescription;
+#if defined(__cplusplus)
+extern "C" void ARDLogToWebRTCLogger(NSString *logString);
+extern "C" NSString *ARDFileName(const char *filePath);
+#else
+extern void ARDLogToWebRTCLogger(NSString *logString);
+extern NSString *ARDFileName(const char *filePath);
+#endif
 
-@interface ARDSDPUtils : NSObject
+#define ARDLogString(format, ...)                                                                \
+  [NSString stringWithFormat:@"(%s %@:%d): " format, __PRETTY_FUNCTION__, ARDFileName(__FILE__), \
+                             __LINE__, ##__VA_ARGS__]
 
-// Updates the original SDP description to instead prefer the specified video
-// codec. We do this by placing the specified codec at the beginning of the
-// codec list if it exists in the sdp.
-+ (RTCSessionDescription *)
-    descriptionForDescription:(RTCSessionDescription *)description
-          preferredVideoCodec:(NSString *)codec;
+#define ARDLog(format, ...)                                    \
+  do {                                                         \
+    NSString *logString = ARDLogString(format, ##__VA_ARGS__); \
+    ARDLogToWebRTCLogger(logString);                           \
+  } while (false)
 
-@end
+#ifdef DEBUG
+#define ARDLogDebug(format, ...) ARDLog(format, ##__VA_ARGS__)
+#else
+#define ARDLogDebug(format, ...) \
+  do {                           \
+  } while (false)
+#endif