ref: a2a56b3ea59188e2e2b60b69a0a8f77aa3093144
dir: /libfaad/cfft.h/
/*
** FAAD - Freeware Advanced Audio Decoder
** Copyright (C) 2002 M. Bakker
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
** $Id: cfft.h,v 1.4 2002/09/26 19:01:45 menno Exp $
**/
#ifndef __CFFT_H__
#define __CFFT_H__
#ifdef __cplusplus
extern "C" {
#endif
typedef struct
{
uint16_t n;
uint16_t ifac[15];
complex_t *work;
complex_t *tab;
} cfft_info;
void cfftf(cfft_info *cfft, complex_t *c);
void cfftb(cfft_info *cfft, complex_t *c);
cfft_info *cffti(uint16_t n);
void cfftu(cfft_info *cfft);
static void passf2(uint16_t ido, uint16_t l1, complex_t *cc, complex_t *ch,
complex_t *wa, int8_t isign);
static void passf3(uint16_t ido, uint16_t l1, complex_t *cc, complex_t *ch,
complex_t *wa1, complex_t *wa2, int8_t isign);
static void passf4(uint16_t ido, uint16_t l1, complex_t *cc, complex_t *ch,
complex_t *wa1, complex_t *wa2, complex_t *wa3, int8_t isign);
static void passf5(uint16_t ido, uint16_t l1, complex_t *cc, complex_t *ch,
complex_t *wa1, complex_t *wa2, complex_t *wa3, complex_t *wa4,
int8_t isign);
INLINE void cfftf1(uint16_t n, complex_t *c, complex_t *ch,
uint16_t *ifac, complex_t *wa, int8_t isign);
static void cffti1(uint16_t n, complex_t *wa, uint16_t *ifac);
#ifdef __cplusplus
}
#endif
#endif