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dianjixz
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/*
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* This file is part of the OpenMV project.
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* Copyright (c) 2013-2016 Kwabena W. Agyeman <kwagyeman@openmv.io>
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* This work is licensed under the MIT license, see the file LICENSE for details.
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*
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* FFT LIB - can do 1024 point real FFTs and 512 point complex FFTs
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*
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*/
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#ifndef __FFT_H__
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#define __FFT_H__
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#include <stdint.h>
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#include "imlib.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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typedef struct fft1d_controller {
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uint8_t *d_pointer;
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int d_len;
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int pow2;
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float *data;
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} fft1d_controller_t;
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void fft1d_alloc(fft1d_controller_t *controller, uint8_t *buf, int len);
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void fft1d_dealloc();
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void fft1d_run(fft1d_controller_t *controller);
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void ifft1d_run(fft1d_controller_t *controller);
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void fft1d_mag(fft1d_controller_t *controller);
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void fft1d_phase(fft1d_controller_t *controller);
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void fft1d_log(fft1d_controller_t *controller);
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void fft1d_exp(fft1d_controller_t *controller);
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void fft1d_swap(fft1d_controller_t *controller); // a.k.a MATLAB fftshift
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void fft1d_run_again(fft1d_controller_t *controller); // Do FFT again on real mag/phase of the FFT.
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typedef struct fft2d_controller {
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image_t *img;
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rectangle_t r;
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int w_pow2, h_pow2;
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float *data;
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} fft2d_controller_t;
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void fft2d_alloc(fft2d_controller_t *controller, image_t *img, rectangle_t *r);
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void fft2d_dealloc(void *msm);
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void fft2d_run(fft2d_controller_t *controller);
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void ifft2d_run(fft2d_controller_t *controller);
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void fft2d_mag(fft2d_controller_t *controller);
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void fft2d_phase(fft2d_controller_t *controller);
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void fft2d_log(fft2d_controller_t *controller);
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void fft2d_exp(fft2d_controller_t *controller);
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void fft2d_swap(fft2d_controller_t *controller); // a.k.a MATLAB fftshift
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void fft2d_linpolar(fft2d_controller_t *controller);
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void fft2d_logpolar(fft2d_controller_t *controller);
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void fft2d_run_again(fft2d_controller_t *controller); // Do FFT again on real mag/phase of the FFT.
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// END
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#ifdef __cplusplus
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}
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#endif
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#endif /* __FFT_H__ */
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