/*

    Copyright (C) 2015 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    AudioEngine is the main controller class that creates the following objects:

                    AVAudioEngine       *_engine;

                    AVAudioPlayerNode   *_marimbaPlayer;

                    AVAudioPlayerNode   *_drumPlayer;

                    AVAudioUnitDelay    *_delay;

                    AVAudioUnitReverb   *_reverb;

                    AVAudioPCMBuffer    *_marimbaLoopBuffer;

                    AVAudioPCMBuffer    *_drumLoopBuffer;

                 It connects all the nodes, loads the buffers as well as controls the AVAudioEngine object itself.

*/

@import Foundation;

// effect strip 1 - Marimba Player -> Delay -> Mixer

// effect strip 2 - Drum Player -> Distortion -> Mixer

@protocol AudioEngineDelegate <NSObject>

@optional

- (void)engineConfigurationHasChanged;

- (void)mixerOutputFilePlayerHasStopped;

@end

@interface AudioEngine : NSObject

@property (nonatomic, readonly) BOOL marimbaPlayerIsPlaying;

@property (nonatomic, readonly) BOOL drumPlayerIsPlaying;

@property (nonatomic) float marimbaPlayerVolume;    // 0.0 - 1.0

@property (nonatomic) float drumPlayerVolume;       // 0.0 - 1.0

@property (nonatomic) float marimbaPlayerPan;       // -1.0 - 1.0

@property (nonatomic) float drumPlayerPan;          // -1.0 - 1.0

@property (nonatomic) float delayWetDryMix;         // 0.0 - 1.0

@property (nonatomic) BOOL bypassDelay;

@property (nonatomic) float reverbWetDryMix;        // 0.0 - 1.0

@property (nonatomic) BOOL bypassReverb;

@property (nonatomic) float outputVolume;           // 0.0 - 1.0

@property (weak) id<AudioEngineDelegate> delegate;

- (void)toggleMarimba;

- (void)toggleDrums;

- (void)startRecordingMixerOutput;

- (void)stopRecordingMixerOutput;

- (void)playRecordedFile;

- (void)pausePlayingRecordedFile;

- (void)stopPlayingRecordedFile;

@end