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74 lines
2.6 KiB
74 lines
2.6 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import <Foundation/Foundation.h>
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@class MIDIClient;
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@class MIDIDestination;
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@class MIDISource;
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extern NSString * const MIDIClientErrorDomain;
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/**
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* Callbacks for MIDIClient changes.
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*
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* Note that these methods may not be called on the main thread.
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*/
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@protocol MIDIClientDelegate <NSObject>
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/** Called when a MIDIClient receives data from a connected source. */
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- (void)MIDIClient:(MIDIClient *)client receivedData:(NSData *)message;
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@optional
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/** Called when a MIDI I/O error occurs on the client's endpoints. */
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- (void)MIDIClient:(MIDIClient *)client receivedError:(NSError *)error;
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/** Called when a MIDI endpoint has been added to the system. */
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- (void)MIDIClientEndpointAdded:(MIDIClient *)client;
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/** Called when a MIDI endpoint has been removed to the system. */
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- (void)MIDIClientEndpointRemoved:(MIDIClient *)client;
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/** Called when the configuration of a MIDI object attached to the system has changed. */
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- (void)MIDIClientConfigurationChanged:(MIDIClient *)client;
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@end
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/** A MIDI client that can read data from a MIDI source and write data to a MIDI destination. */
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@interface MIDIClient : NSObject
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/** The source attached by -connectToSource:error:. */
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@property (readonly, nonatomic) MIDISource *source;
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/** The destination attached by -connectToDestination:error:. */
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@property (readonly, nonatomic) MIDIDestination *destination;
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@property (nonatomic, weak) id<MIDIClientDelegate> delegate;
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/**
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* Creates a new MIDI client with a friendly name.
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*
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* If an error occurs, nil is returned and the error is populated with a description of the issue.
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*/
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- (instancetype)initWithName:(NSString *)name error:(NSError **)error;
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/** Attaches an input source to the client. */
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- (BOOL)connectToSource:(MIDISource *)source error:(NSError **)error;
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/** Attaches an output destination to the client. */
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- (BOOL)connectToDestination:(MIDIDestination *)destination error:(NSError **)error;
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/** Sends a MIDI packet of data to the client's output destination. */
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- (BOOL)sendData:(NSData *)data error:(NSError **)error;
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@end
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