mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 2013, Ismael Gomez-Miguelez <gomezi@tcd.ie>.
|
|
* This file is part of OSLD-lib (http://https://github.com/ismagom/osld-lib)
|
|
*
|
|
* OSLD-lib is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* OSLD-lib is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with OSLD-lib. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef DFT_H_
|
|
#define DFT_H_
|
|
|
|
#include <fftw3.h>
|
|
|
|
|
|
/* dft is a frontend to the fftw3 library. It facilitates the computation of complex or real DFT,
|
|
* power spectral density, normalization, etc.
|
|
* It also supports the creation of multiple FFT plans for different FFT sizes or options, selecting
|
|
* a different one at runtime.
|
|
*/
|
|
|
|
|
|
typedef enum {
|
|
COMPLEX_2_COMPLEX, REAL_2_REAL, COMPLEX_2_REAL
|
|
}dft_mode_t;
|
|
|
|
typedef enum {
|
|
FORWARD, BACKWARD
|
|
}dft_dir_t;
|
|
|
|
|
|
#define DFT_MIRROR_PRE 1
|
|
#define DFT_PSD 2
|
|
#define DFT_OUT_DB 4
|
|
#define DFT_MIRROR_POS 8
|
|
#define DFT_NORMALIZE 16
|
|
#define DFT_DC_OFFSET 32
|
|
|
|
typedef struct {
|
|
int size;
|
|
int sign;
|
|
void *in;
|
|
void *out;
|
|
void *p;
|
|
int options;
|
|
dft_dir_t dir;
|
|
dft_mode_t mode;
|
|
}dft_plan_t;
|
|
|
|
typedef _Complex float dft_c_t;
|
|
typedef float dft_r_t;
|
|
|
|
/* Create DFT plans */
|
|
|
|
int dft_plan(const int dft_points, dft_mode_t mode, dft_dir_t dir, dft_plan_t *plan);
|
|
int dft_plan_c2c(const int dft_points, dft_dir_t dir, dft_plan_t *plan);
|
|
int dft_plan_r2r(const int dft_points, dft_dir_t dir, dft_plan_t *plan);
|
|
int dft_plan_c2r(const int dft_points, dft_dir_t dir, dft_plan_t *plan);
|
|
|
|
void dft_plan_free(dft_plan_t *plan);
|
|
|
|
|
|
/* Create a vector of DFT plans */
|
|
|
|
int dft_plan_vector(const int *dft_points, dft_mode_t *modes, dft_dir_t *dirs,
|
|
int nof_plans, dft_plan_t *plans);
|
|
int dft_plan_multi_c2c(const int *dft_points, dft_dir_t dir, int nof_plans,
|
|
dft_plan_t *plans);
|
|
int dft_plan_multi_c2r(const int *dft_points, dft_dir_t dir, int nof_plans,
|
|
dft_plan_t *plans);
|
|
int dft_plan_multi_r2r(const int *dft_points, dft_dir_t dir, int nof_plans,
|
|
dft_plan_t *plans);
|
|
void dft_plan_free_vector(dft_plan_t *plan, int nof_plans);
|
|
|
|
/* Compute DFT */
|
|
|
|
void dft_run(dft_plan_t *plan, void *in, void *out);
|
|
void dft_run_c2c(dft_plan_t *plan, dft_c_t *in, dft_c_t *out);
|
|
void dft_run_r2r(dft_plan_t *plan, dft_r_t *in, dft_r_t *out);
|
|
void dft_run_c2r(dft_plan_t *plan, dft_c_t *in, dft_r_t *out);
|
|
|
|
#endif
|
|
|