/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Metronome class header file

*/

#import <AVFoundation/AVFoundation.h>

@protocol MetronomeDelegate;

@interface Metronome : NSObject {

}

- (nullable instancetype)init:(NSURL * _Nullable)fileURL NS_DESIGNATED_INITIALIZER;

- (BOOL)start;

- (void)stop;

- (void)setTempo:(Float32)tempo;

@property(weak, nullable) id<MetronomeDelegate> delegate;

@end

@protocol MetronomeDelegate <NSObject>

@optional 

- (void)metronomeTicking:(Metronome * _Nonnull)metronome bar:(SInt32)bar beat:(SInt32)beat;

@end