56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/***************************************************************************
|
|
*
|
|
* Copyright 2015-2019 BES.
|
|
* All rights reserved. All unpublished rights reserved.
|
|
*
|
|
* No part of this work may be used or reproduced in any form or by any
|
|
* means, or stored in a database or retrieval system, without prior written
|
|
* permission of BES.
|
|
*
|
|
* Use of this work is governed by a license granted by BES.
|
|
* This work contains confidential and proprietary information of
|
|
* BES. which is protected by copyright, trade secret,
|
|
* trademark and other intellectual property rights.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef FFTR4_FXP_H
|
|
#define FFTR4_FXP_H
|
|
|
|
#define FFTR4_TWIDDLE_WIDTH 16
|
|
#define FFTR4_DATA_WIDTH 16
|
|
#define FFTR4_SCALE 6
|
|
|
|
/* Q1.15 */
|
|
#define FFTR4_INPUT_FORMAT_X 1
|
|
#define FFTR4_INPUT_FORMAT_Y 15
|
|
#define FFTR4_INPUT_FORMAT (FFTR4_INPUT_FORMAT_X+FFTR4_INPUT_FORMAT_Y)
|
|
|
|
/* Q1.15 */
|
|
#define FFTR4_OUTPUT_FORMAT_X 1
|
|
#define FFTR4_OUTPUT_FORMAT_Y 15
|
|
#define FFTR4_OUTPUT_FORMAT (FFTR4_OUTPUT_FORMAT_X+FFTR4_OUTPUT_FORMAT_Y)
|
|
|
|
typedef struct {
|
|
int re;
|
|
int im;
|
|
} FftData_t;
|
|
|
|
typedef struct {
|
|
int re;
|
|
int im;
|
|
} FftTwiddle_t;
|
|
|
|
typedef enum
|
|
{
|
|
FFT_MODE = 0,
|
|
IFFT_MODE
|
|
}FftMode_t;
|
|
|
|
void make_symmetric_twiddles(FftTwiddle_t w[], int N, int width);
|
|
void fftr4(int N, FftData_t x[], FftTwiddle_t w[], int twiddleWidth, int dataWidth, FftMode_t ifft);
|
|
void dibit_reverse_array(FftData_t *vector);
|
|
//void dibit_reverse_array(FftData_t *vector);
|
|
unsigned int dibit_reverse_int(unsigned int x, unsigned int N);
|
|
|
|
#endif |