fir16.h

freescale MAC DSP的算法库（FFT

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*
*  FILE NAME: fir16.h
*
*  PURPOSE: FIR16 functions and data structures declarations
*
*  AUTHOR: Andrey Butok
*	Modified by Igor Drozdinsky
*
***********************************************************************/
#ifndef _FIR_16_H_
#define _FIR_16_H_

#include "fir.h"

typedef struct tFir16Struct
	{
	Frac16* 		pFirCoef;		    // Coefficients for FIR -> {a0,a1,a2...}
	unsigned int    iFirCoefCount;	    // Number of Coefficients
	Frac16* 		pFirHistory;		// Buffer for Save hisory between function calls-> {X1,X2,X3...}
	unsigned int    iFirHistoryCount;	// Number of values in History Buffer
	};

/************************************************************************
*     Function Prototypes
************************************************************************/
 //Computes a Finite Impulse Response for a array of 16-bit fractional data values.
 struct tFir16Struct* FIR16Create( Frac16* pCoef, uint16 u16Num);
 
 void FIR16Destroy( struct tFir16Struct* pFIR);

 void FIR16_EMAC(struct tFir16Struct *pFIR, Frac16* pX, Frac16* pY, unsigned int n);
 void FIR16_MAC(struct tFir16Struct *pFIR, Frac16* pX, Frac16* pY, unsigned int n);

#ifdef __EMAC
	#define FIR16(w,x,y,z)	FIR16_EMAC(w,x,y,z)
#else
	#define FIR16(w,x,y,z)	FIR16_MAC(w,x,y,z)
#endif

 
#endif //_FIR_16_H_