Update

subprojects/gst-docs/examples/tutorials/xcode iOS/Tutorial 4/GStreamerBackendDelegate.h

@@ -0,0 +1,20 @@
+#import <Foundation/Foundation.h>
+
+@protocol GStreamerBackendDelegate <NSObject>
+
+@optional
+/* Called when the GStreamer backend has finished initializing
+ * and is ready to accept orders. */
+-(void) gstreamerInitialized;
+
+/* Called when the GStreamer backend wants to output some message
+ * to the screen. */
+-(void) gstreamerSetUIMessage:(NSString *)message;
+
+/* Called when the media size is first discovered or it changes */
+-(void) mediaSizeChanged:(NSInteger)width height:(NSInteger)height;
+
+/* Called when the media position changes. Times in milliseconds */
+-(void) setCurrentPosition:(NSInteger)position duration:(NSInteger)duration;
+
+@end