/* * SPDX-License-Identifier: MIT * * Copyright (C) 2013-2024 OpenMV, LLC. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * FFT LIB - can do 1024 point real FFTs and 512 point complex FFTs */ #ifndef __FFT_H__ #define __FFT_H__ #include #include "imlib.h" typedef struct fft1d_controller { uint8_t *d_pointer; int d_len; int pow2; float *data; } fft1d_controller_t; void fft1d_alloc(fft1d_controller_t *controller, uint8_t *buf, int len); void fft1d_dealloc(); void fft1d_run(fft1d_controller_t *controller); void ifft1d_run(fft1d_controller_t *controller); void fft1d_mag(fft1d_controller_t *controller); void fft1d_phase(fft1d_controller_t *controller); void fft1d_log(fft1d_controller_t *controller); void fft1d_exp(fft1d_controller_t *controller); void fft1d_swap(fft1d_controller_t *controller); // a.k.a MATLAB fftshift void fft1d_run_again(fft1d_controller_t *controller); // Do FFT again on real mag/phase of the FFT. typedef struct fft2d_controller { image_t *img; rectangle_t r; int w_pow2, h_pow2; float *data; } fft2d_controller_t; void fft2d_alloc(fft2d_controller_t *controller, image_t *img, rectangle_t *r); void fft2d_dealloc(); void fft2d_run(fft2d_controller_t *controller); void ifft2d_run(fft2d_controller_t *controller); void fft2d_mag(fft2d_controller_t *controller); void fft2d_phase(fft2d_controller_t *controller); void fft2d_log(fft2d_controller_t *controller); void fft2d_exp(fft2d_controller_t *controller); void fft2d_swap(fft2d_controller_t *controller); // a.k.a MATLAB fftshift void fft2d_linpolar(fft2d_controller_t *controller); void fft2d_logpolar(fft2d_controller_t *controller); void fft2d_run_again(fft2d_controller_t *controller); // Do FFT again on real mag/phase of the FFT. // END #endif /* __FFT_H__ */