aurio_helper.h

/*
 
     File: aurio_helper.h
 Abstract: Helper class for manipulating the remote i/o audio unit
  Version: 1.0
 
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 */

#if !defined(__rio_helper_h__)
#define __rio_helper_h__

#include "CAStreamBasicDescription.h"

#define kNumDrawBuffers 1
#define kDefaultDrawSamples 1024
#define kMinDrawSamples 64
#define kMaxDrawSamples 4096

extern int drawBufferIdx;
extern int drawBufferLen;
extern int drawBufferLen_alloced;
extern SInt8 *drawBuffers[];

int SetupRemoteIO (AudioUnit& inRemoteIOUnit, AURenderCallbackStruct inRenderProcm, CAStreamBasicDescription& outFormat);
void SilenceData(AudioBufferList *inData);

class DCRejectionFilter
{
public:
	DCRejectionFilter(Float32 poleDist = DCRejectionFilter::kDefaultPoleDist);
    
	void InplaceFilter(Float32* ioData, UInt32 numFrames);
	void Reset();
    
protected:
	
	// State variables
	Float32 mY1;
	Float32 mX1;
	
	static const Float32 kDefaultPoleDist;
};

#endif