AETypes.h

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//
//  AETypes.h
//  TheAmazingAudioEngine
//
//  Created by Michael Tyson on 23/03/2016.
//  Copyright © 2016 A Tasty Pixel. All rights reserved.
//
//  This software is provided 'as-is', without any express or implied
//  warranty.  In no event will the authors be held liable for any damages
//  arising from the use of this software.
//
//  Permission is granted to anyone to use this software for any purpose,
//  including commercial applications, and to alter it and redistribute it
//  freely, subject to the following restrictions:
//
//  1. The origin of this software must not be misrepresented; you must not
//     claim that you wrote the original software. If you use this software
//     in a product, an acknowledgment in the product documentation would be
//     appreciated but is not required.
//
//  2. Altered source versions must be plainly marked as such, and must not be
//     misrepresented as being the original software.
//
//  3. This notice may not be removed or altered from any source distribution.
//

#ifdef __cplusplus
extern "C" {
#endif

#import <Foundation/Foundation.h>
#import <AudioToolbox/AudioToolbox.h>

extern const AudioStreamBasicDescription AEAudioDescription;

AudioStreamBasicDescription AEAudioDescriptionWithChannelsAndRate(int channels, double rate);

typedef NS_ENUM(NSInteger, AEAudioFileType) {
    AEAudioFileTypeAIFFFloat32, 
    AEAudioFileTypeAIFFInt16,   
    AEAudioFileTypeWAVInt16,    
    AEAudioFileTypeM4A,         
};

typedef struct {
    int firstChannel; 
    int lastChannel;  
} AEChannelSet;
    
extern AEChannelSet AEChannelSetDefault; 

static inline AEChannelSet AEChannelSetMake(int firstChannel, int lastChannel) {
    return (AEChannelSet) {firstChannel, lastChannel};
}
    
static inline int AEChannelSetGetNumberOfChannels(AEChannelSet set) {
    return set.lastChannel - set.firstChannel + 1;
}

#ifdef __cplusplus
}
#endif