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direct_fourier_transform.h
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direct_fourier_transform.h
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// Copyright 2019 Adam Campbell, Seth Hall, Andrew Ensor
// High Performance Computing Research Laboratory,
// Auckland University of Technology (AUT)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifdef __cplusplus
extern "C" {
#endif
#ifndef DIRECT_FOURIER_TRANSFORM_H_
#define DIRECT_FOURIER_TRANSFORM_H_
//=========================//
// Algorithm Constants //
//=========================//
// Pi (double precision)
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
// Speed of light
#ifndef C
#define C 299792458.0
#endif
//=========================//
// Structures //
//=========================//
typedef struct Complex {
double real;
double imaginary;
} Complex;
typedef struct Source {
double l;
double m;
double intensity;
} Source;
typedef struct Visibility {
double u;
double v;
double w;
Complex brightness;
double intensity;
} Visibility;
typedef struct Config {
int num_visibilities;
int num_sources;
char *source_file;
char *vis_file;
bool synthetic_sources;
bool synthetic_visibilities;
bool gaussian_distribution_sources;
bool forceZeroWTerm;
double min_u;
double max_u;
double min_v;
double max_v;
double min_w;
double max_w;
double grid_size;
double cell_size;
double uv_scale;
double frequency_hz;
} Config;
//=========================//
// Function Headers //
//=========================//
void init_config (Config *config);
void load_sources(Config *config, Source **sources);
void load_visibilities(Config *config, Visibility **visibilities);
void extract_visibilities(Config *config, Source *sources, Visibility *visibilities, int num_visibilities);
void save_visibilities(Config *config, Visibility *visibilities);
double random_in_range(double min, double max);
double generate_sample_normal(void);
void unit_test_init_config(Config *config);
double unit_test_generate_approximate_visibilities(void);
#endif /* DIRECT_FOURIER_TRANSFORM_H_ */
#ifdef __cplusplus
}
#endif