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Novocaine.h
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Novocaine.h
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// Copyright (c) 2012 Alex Wiltschko
//
// 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>
#if defined __MAC_OS_X_VERSION_MAX_ALLOWED
#define USING_OSX
#include <CoreAudio/CoreAudio.h>
#else
#define USING_IOS
#include <AVFoundation/AVFoundation.h>
#endif
#include <Block.h>
#ifdef __cplusplus
extern "C" {
#endif
static void CheckError(OSStatus error, const char *operation)
{
if (error == noErr) return;
char str[20];
// see if it appears to be a 4-char-code
*(UInt32 *)(str + 1) = CFSwapInt32HostToBig(error);
if (isprint(str[1]) && isprint(str[2]) && isprint(str[3]) && isprint(str[4])) {
str[0] = str[5] = '\'';
str[6] = '\0';
} else
// no, format it as an integer
sprintf(str, "%d", (int)error);
fprintf(stderr, "Error: %s (%s)\n", operation, str);
exit(1);
}
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);
#if defined (USING_IOS)
void sessionPropertyListener(void * inClientData,
AudioSessionPropertyID inID,
UInt32 inDataSize,
const void * inData);
#endif
void sessionInterruptionListener(void *inClientData, UInt32 inInterruption);
#ifdef __cplusplus
}
#endif
typedef void (^NovocaineOutputBlock)(float *data, UInt32 numFrames, UInt32 numChannels);
typedef void (^NovocaineInputBlock)(float *data, UInt32 numFrames, UInt32 numChannels);
#if defined (USING_IOS)
@interface Novocaine : NSObject <UIAlertViewDelegate>
#elif defined (USING_OSX)
@interface Novocaine : NSObject
#endif
// ------ These properties/methods are used for configuration -------
@property (nonatomic, copy) NSString *inputRoute;
// TODO: Not yet implemented. No effect right now.
//@property (nonatomic, assign) BOOL inputEnabled;
#ifdef USING_IOS
@property (nonatomic, assign) BOOL forceOutputToSpeaker;
#endif
// Explicitly declaring the block setters will create the correct block signature for auto-complete.
// These will map to the setters for the block properties below.
- (void)setInputBlock:(NovocaineInputBlock)block;
- (void)setOutputBlock:(NovocaineOutputBlock)block;
@property (nonatomic, copy) NovocaineOutputBlock outputBlock;
@property (nonatomic, copy) NovocaineInputBlock inputBlock;
// ------------------------------------------------------------------
// these should be readonly in public interface - no need for public write access
@property (nonatomic, assign, readonly) AudioUnit inputUnit;
@property (nonatomic, assign, readonly) AudioUnit outputUnit;
@property (nonatomic, assign, readonly) AudioBufferList *inputBuffer;
@property (nonatomic, assign, readonly) BOOL inputAvailable;
@property (nonatomic, assign, readonly) UInt32 numInputChannels;
@property (nonatomic, assign, readonly) UInt32 numOutputChannels;
@property (nonatomic, assign, readonly) Float64 samplingRate;
@property (nonatomic, assign, readonly) BOOL isInterleaved;
@property (nonatomic, assign, readonly) UInt32 numBytesPerSample;
@property (nonatomic, assign, readonly) AudioStreamBasicDescription inputFormat;
@property (nonatomic, assign, readonly) AudioStreamBasicDescription outputFormat;
@property (nonatomic, assign, readonly) BOOL playing;
// @property BOOL playThroughEnabled;
// Singleton methods
+ (Novocaine *) audioManager;
// Audio Unit methods
- (void)play;
- (void)pause;
#if defined ( USING_IOS )
- (void)checkSessionProperties;
- (void)checkAudioSource;
#endif
@end