pinebuds/services/multimedia/algorithm/fft/include/fft128dot.h

57 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 All unpublished rights reserved.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);
FftData_t sat(FftData_t x, int width);
#endif