/*-------------------------------------------------------------------------
 * 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[] */
  avfloat_t *pBufXsave;          /* Overlap-Save Puffer xs[S*L]         */
  FFT *pFFT;                   /* FFT-Objekt                          */
} PFFT;


void CmpxVectMul(struct _sCOMPLEX *pA, struct _sCOMPLEX *pB, struct _sCOMPLEX *pAB, UINT32 len);
void CmpxVectAdd(struct _sCOMPLEX *pA, struct _sCOMPLEX *pB, struct _sCOMPLEX *pAB, UINT32 len);
void CmpxVectMac(struct _sCOMPLEX *pA, struct _sCOMPLEX *pB, struct _sCOMPLEX *pAB, UINT32 len);
void CmpxVectMulS(struct _sCOMPLEX *pA, struct _sCOMPLEX *pB, struct _sCOMPLEX *pAB, UINT32 len);
void CmpxVectMacS(struct _sCOMPLEX *pA, struct _sCOMPLEX *pB, struct _sCOMPLEX *pAB, UINT32 len);
 
#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, avfloat_t *pWTD, CMPXBUF *pH);
AVERR PfftFilter(PFFT *pObj, CMPXBUF *pH, avfloat_t *px, avfloat_t *py);

#ifdef __cplusplus
}
#endif
#endif /* _PFFT_H */