kopia lustrzana https://github.com/Dsplib/libdspl-2.0
87 wiersze
2.1 KiB
C
87 wiersze
2.1 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 <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "dspl.h"
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/*******************************************************************************
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Rectangle pulse signal
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*******************************************************************************/
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int DSPL_API signal_pimp(double* t, size_t n, double amp,
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double tau, double dt, double period, double* y)
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{
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size_t k;
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double ll, lr, p2, tp;
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if(!t || !y)
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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(tau < 0.0 || period < 0.0)
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return ERROR_NEGATIVE;
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ll = -0.5 * tau;
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lr = 0.5 * tau;
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p2 = period*0.5;
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for(k = 0; k < n; k++)
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{
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tp = dmod(t[k] - dt + p2, period) - p2;
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y[k] = (tp < ll || tp > lr) ? 0.0 : amp;
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}
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return RES_OK;
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}
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/*******************************************************************************
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Saw periodic signal
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*******************************************************************************/
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int DSPL_API signal_saw(double* t, size_t n, double amp,
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double dt, double period, double* y)
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{
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size_t k;
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double p2, tp;
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if(!t || !y)
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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(period < 0.0)
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return ERROR_NEGATIVE;
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p2 = period*0.5;
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for(k = 0; k < n; k++)
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{
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tp = dmod(t[k] - dt + p2, period) - p2;
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y[k] = amp * tp;
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}
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return RES_OK;
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}
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