Update

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

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+#import <Foundation/Foundation.h>
+#import "GStreamerBackendDelegate.h"
+
+@interface GStreamerBackend : NSObject
+
+/* Initialization method. Pass the delegate that will take care of the UI.
+ * This delegate must implement the GStreamerBackendDelegate protocol.
+ * Pass also the UIView object that will hold the video window. */
+-(id) init:(id) uiDelegate videoView:(UIView*) video_view;
+
+/* Quit the main loop and free all resources, including the pipeline and
+ * the references to the ui delegate and the UIView used for rendering, so
+ * these objects can be deallocated. */
+-(void) deinit;
+
+/* Set the pipeline to PLAYING */
+-(void) play;
+
+/* Set the pipeline to PAUSED */
+-(void) pause;
+
+/* Set the URI to be played */
+-(void) setUri:(NSString*)uri;
+
+/* Set the position to seek to, in milliseconds */
+-(void) setPosition:(NSInteger)milliseconds;
+
+@end