kopia lustrzana https://github.com/Dsplib/libdspl-2.0
55 wiersze
1.5 KiB
C
55 wiersze
1.5 KiB
C
/*
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* Copyright (c) 2015-2019 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 libdspl-2.0.
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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 Lesser 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 Lesser 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 <string.h>
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#include "dspl.h"
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#ifdef DOXYGEN_ENGLISH
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#endif
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#ifdef DOXYGEN_RUSSIAN
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#endif
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int DSPL_API low2bs(double* b, double* a, int ord,
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double w0, double wsl, double wsh,
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double* beta, double* alpha)
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{
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double den[3] = {0.0, 0.0, 1.0};
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double num[3] = {0.0, 0.0, 0.0};
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if(!b || !a || !beta || !alpha)
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return ERROR_PTR;
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if(ord < 1)
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return ERROR_FILTER_ORD;
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if(w0 <= 0.0 || wsl <= 0.0 || wsh <= 0.0 || wsh <= wsl)
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return ERROR_FILTER_FT;
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den[0] = (wsh * wsl) / (w0 * w0);
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num[1] = (wsh - wsl) / w0;
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return ratcompos(b, a, ord, num, den, 2, beta, alpha);
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}
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