Novocaine.h

// Copyright (c) 2012 Alex Wiltschko
// Updated for iOS7 Eric Larson, 2013
// 
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.

#import <CoreFoundation/CoreFoundation.h>
#import <AudioToolbox/AudioToolbox.h>
#import <Accelerate/Accelerate.h>
#import <AVFoundation/AVAudioSession.h>
#import <Foundation/Foundation.h>

#include <Block.h>


#ifdef __cplusplus
extern "C" {
#endif

    //void CheckError(OSStatus error, const char *operation);

    
OSStatus inputCallback (void						*inRefCon,
						AudioUnitRenderActionFlags	* ioActionFlags,
						const AudioTimeStamp 		* inTimeStamp,
						UInt32						inOutputBusNumber,
						UInt32						inNumberFrames,
						AudioBufferList				* ioData);

OSStatus renderCallback (void						*inRefCon,
                         AudioUnitRenderActionFlags	* ioActionFlags,
                         const AudioTimeStamp 		* inTimeStamp,
                         UInt32						inOutputBusNumber,
                         UInt32						inNumberFrames,
                         AudioBufferList				* ioData);


void sessionPropertyListener(void *                  inClientData,
							 AudioSessionPropertyID  inID,
							 UInt32                  inDataSize,
							 const void *            inData);



void sessionInterruptionListener(void *inClientData, UInt32 inInterruption);

#ifdef __cplusplus
}
#endif

typedef void (^OutputBlock)(float *data, UInt32 numFrames, UInt32 numChannels);
typedef void (^InputBlock)(float *data, UInt32 numFrames, UInt32 numChannels);

@interface Novocaine : NSObject 

@property AudioUnit inputUnit;
@property AudioBufferList *inputBuffer;
@property (nonatomic, copy) OutputBlock outputBlock;
@property (nonatomic, copy) InputBlock inputBlock;
@property BOOL inputAvailable;
@property (nonatomic, retain) NSString *inputRoute;
@property UInt32 numInputChannels;
@property UInt32 numOutputChannels;
@property Float64 samplingRate;
@property BOOL isInterleaved;
@property BOOL isSetUp;
@property UInt32 numBytesPerSample;
@property AudioStreamBasicDescription inputFormat;
@property AudioStreamBasicDescription outputFormat;

// @property BOOL playThroughEnabled;
@property BOOL playing;
@property float *inData;
@property float *outData;
@property (nonatomic) BOOL shouldSaveContinuouslySampledMicrophoneAudioDataToNewFile; //

@property (nonatomic, strong) NSString *audioFileWrittenOut;


// Singleton methods
+ (Novocaine *) audioManager;


// Audio Unit methods
- (void)play;
- (void)pause;
- (void)setupAudio;
- (void)teardownAudio;
- (void)ifAudioInputIsAvailableThenSetupAudioSession;

- (void)checkSessionProperties;
- (void)checkAudioSource;

-(void)overrideMicrophoneWithAudioFile:(NSString*)audioFileName;
-(void)setDebugModeOffAndUseMicrophone;

+ (enum AVAudioSessionRecordPermission)checkAudioAuthorization;


@end