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 All unpublished rights reserved.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