kopia lustrzana https://github.com/Dsplib/libdspl-2.0
151 wiersze
4.6 KiB
C
151 wiersze
4.6 KiB
C
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/*
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* Copyright (c) 2015-2020 Sergey Bakhurin
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* Digital Signal Processing Library [http://dsplib.org]
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*
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* This file is part of DSPL.
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*
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* is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DSPL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "dspl.h"
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#ifdef DOXYGEN_ENGLISH
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/*! ****************************************************************************
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\ingroup TYPES_GROUP
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\fn int cmplx2re(complex_t* x, int n, double* re, double* im)
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\brief Separate complex vector to the real and image vectors
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Function fills `re` and `im` vectors corresponds to real and image
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parts of the input complex array `x`. \n
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\param[in] x
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Pointer to the real complex vector. \n
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Vector size is `[n x 1]`. \n \n
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\param[in] n
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Size of the input complex vector `x` and real and image
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vectors `re` and `im`. \n \n
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\param[out] re
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Pointer to the real part vector. \n
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Vector size is `[n x 1]`. \n
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Memory must be allocated. \n \n
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\param[out] im
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Pointer to the image part vector. \n
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Vector size is `[n x 1]`. \n
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Memory must be allocated. \n \n
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\return
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`RES_OK` if function converts complex vector successfully. \n
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Else \ref ERROR_CODE_GROUP "code error". \n
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Example: \n
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\code{.cpp}
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complex_t x[3] = {{1.0, 2.0}, {3.0, 4.0}, {5.0, 6.0}};
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double re[3], im[3];
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cmplx2re(x, 3, re, im);
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\endcode
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Vectors `re` and `im` will contains:
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\verbatim
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re[0] = 1.0; im[0] = 2.0;
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re[1] = 3.0; im[1] = 4.0;
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re[2] = 5.0; im[2] = 6.0;
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\endverbatim
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\author Sergey Bakhurin. www.dsplib.org
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***************************************************************************** */
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#endif
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#ifdef DOXYGEN_RUSSIAN
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/*! ****************************************************************************
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\ingroup TYPES_GROUP
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\fn int cmplx2re(complex_t* x, int n, double* re, double* im)
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\brief Преобразование массива комплексных данных в два массива
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вещественных данных, содержащих реальную и мнимую части
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исходного массива
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Функция заполняет реальные массивы `re` и `im` соответствующими значениями
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реальной и мнимой частей исходного комплексного массива `x`. \n
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\param[in] x
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Указатель на массив комплексных данных. \n
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Размер массива `[n x 1]`. \n \n
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\param[in] n
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Размер массивов входных и выходных данных. \n \n
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\param[out] re
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Указатель на адрес массива реальной части данных. \n
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Размер массива `[n x 1]`. \n
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Память должна быть выделена. \n \n
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\param[out] im
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Указатель на адрес массива мнимой части данных. \n
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Размер массива `[n x 1]`. \n
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Память должна быть выделена. \n \n
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\return
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`RES_OK` если преобразование произведено успешно. \n
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В противном случае \ref ERROR_CODE_GROUP "код ошибки": \n
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Например при выполнении следующего кода
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\code{.cpp}
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complex_t x[3] = {{1.0, 2.0}, {3.0, 4.0}, {5.0, 6.0}};
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double re[3], im[3];
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cmplx2re(x, 3, re, im);
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\endcode
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Элементам массивов `re` и `im` будут присвоены значения:
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\verbatim
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re[0] = 1.0; im[0] = 2.0;
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re[1] = 3.0; im[1] = 4.0;
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re[2] = 5.0; im[2] = 6.0;
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\endverbatim
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\author Бахурин Сергей www.dsplib.org
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***************************************************************************** */
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#endif
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int DSPL_API cmplx2re(complex_t* x, int n, double* re, double* im)
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{
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int k;
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if(!x)
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return ERROR_PTR;
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if(n < 1)
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return ERROR_SIZE;
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if(re)
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{
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for(k = 0; k < n; k++)
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re[k] = RE(x[k]);
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}
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if(im)
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{
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for(k = 0; k < n; k++)
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im[k] = IM(x[k]);
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}
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return RES_OK;
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}
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