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git-svn-id: http://moon:8086/svn/software/trunk/libsrc/avpflms@1 b431acfa-c32f-4a4a-93f1-934dc6c82436
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jens
2014-07-19 07:44:42 +00:00
commit e93e7927cb
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pfft.h
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+153
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/*-------------------------------------------------------------------------
* pfft.h Partioned Fast Fourier Transform
* $Id: $
*-------------------------------------------------------------------------
*
* Copyright (C) 2001 Algo Vision Systems GmbH
*
*-------------------------------------------------------------------------
*/
#ifndef _PFFT_H
#define _PFFT_H
#include "avtypes.h"
#include "avfft.h"
/*-----------------------------------------------------------------------*/
/* PFLMS-Parameter */
/*-----------------------------------------------------------------------*/
typedef struct _sCOMPLEX
{
avfloat_t *pReal, *pImag;
} COMPLEX;
typedef struct _sREALBUF
{
avfloat_t *pData;
struct _sREALBUF *pNext, *pLast, *pLastPS;
UINT32 user;
} REALBUF;
typedef struct _sCMPXBUF
{
struct _sCOMPLEX cmpxData;
struct _sCMPXBUF *pNext, *pLast, *pLastPS;
UINT32 user;
} CMPXBUF;
typedef struct _sPFFT
{
UINT32 N, P, S, L, C; /* PFLMS-Parameter N, P, S, L, C */
CMPXBUF *pBufX; /* komplexer Puffer X[P*S][C] */
CMPXBUF *pX; /* aktuelle Zeiger auf Puffer[p][] */
COMPLEX *pY; /* temporaerer Puffer fuer Y[] und E[] */
COMPLEX BufXsave; /* Overlap-Save Puffer xs[S*L] */
FFT *pFFT; /* FFT-Objekt */
} PFFT;
#ifdef __cplusplus
extern "C" {
#endif
AVERR PfftInit(PFFT *pObj,UINT32 N, UINT32 P, UINT32 S, UINT32 L, UINT32 C);
AVERR PfftFilterAlloc(PFFT *pObj, CMPXBUF **ppH);
AVERR PfftFilterInit(PFFT *pObj, COMPLEX WTD, CMPXBUF *pH);
AVERR PfftFilter(PFFT *pObj, CMPXBUF *pH, COMPLEX x, COMPLEX y);
AVERR PfftFilterFast(PFFT *pObj, CMPXBUF *pH);
avfloat_t *PfftGetBufInRe(PFFT *pObj);
avfloat_t *PfftGetBufInIm(PFFT *pObj);
avfloat_t *PfftGetBufOutRe(PFFT *pObj);
avfloat_t *PfftGetBufOutIm(PFFT *pObj);
/*-----------------------------------------------------------------*/
/* Complex-Funktionen
/*-----------------------------------------------------------------*/
_inline void CmpxVectMul(
struct _sCOMPLEX *pA,
struct _sCOMPLEX *pB,
struct _sCOMPLEX *pAB,
UINT32 len)
{
UINT32 i;
for (i=0; i < len; i++)
{
pAB->pReal[i] = pA->pReal[i]*pB->pReal[i]
- pA->pImag[i]*pB->pImag[i];
pAB->pImag[i] = pA->pReal[i]*pB->pImag[i]
+ pA->pImag[i]*pB->pReal[i];
}
}
_inline void CmpxVectAdd(
struct _sCOMPLEX *pA,
struct _sCOMPLEX *pB,
struct _sCOMPLEX *pAB,
UINT32 len)
{
UINT32 i;
for (i=0; i < len; i++)
{
pAB->pReal[i] = pA->pReal[i] + pB->pReal[i];
pAB->pImag[i] = pA->pImag[i] + pB->pImag[i];
}
}
_inline void CmpxVectMac(
struct _sCOMPLEX *pA,
struct _sCOMPLEX *pB,
struct _sCOMPLEX *pAB,
UINT32 len)
{
UINT32 i;
for (i=0; i < len; i++)
{
pAB->pReal[i] += pA->pReal[i]*pB->pReal[i]
- pA->pImag[i]*pB->pImag[i];
pAB->pImag[i] += pA->pReal[i]*pB->pImag[i]
+ pA->pImag[i]*pB->pReal[i];
}
}
_inline void CmpxVectMulS(
struct _sCOMPLEX *pA,
struct _sCOMPLEX *pB,
struct _sCOMPLEX *pAB,
UINT32 len)
{
UINT32 i;
for (i=0; i < len; i++)
{
pAB->pReal[i] = (pA->pReal[i]*pB->pReal[i]
- pA->pImag[i]*pB->pImag[i])*len;
pAB->pImag[i] = (pA->pReal[i]*pB->pImag[i]
+ pA->pImag[i]*pB->pReal[i])*len;
}
}
_inline void CmpxVectMacS(
struct _sCOMPLEX *pA,
struct _sCOMPLEX *pB,
struct _sCOMPLEX *pAB,
UINT32 len)
{
UINT32 i;
for (i=0; i < len; i++)
{
pAB->pReal[i] += (pA->pReal[i]*pB->pReal[i]
- pA->pImag[i]*pB->pImag[i])*len;
pAB->pImag[i] += (pA->pReal[i]*pB->pImag[i]
+ pA->pImag[i]*pB->pReal[i])*len;
}
}
#ifdef __cplusplus
}
#endif
#endif /* _PFFT_H */