kopia lustrzana https://github.com/Dsplib/libdspl-2.0
added ratcomops and low2low transformation
Dsplib
rodzic
c1e475064c
commit
b203899a2d
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@ -0,0 +1,158 @@
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/*
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* Copyright (c) 2015-2018 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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/******************************************************************************
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low 2 low transformation
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*******************************************************************************/
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int DSPL_API low2low(double* b, double* a, int ord, double w0, double w1,
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double* beta, double* alpha)
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{
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double num[2] = {0.0, 1.0};
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double den[2] = {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 || w1 <= 0.0)
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return ERROR_FILTER_FT;
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den[0] = w0 / w1;
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return ratcompos(b, a, ord, num, den, 1, beta, alpha);
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}
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/******************************************************************************
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Rational composition
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*******************************************************************************/
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int DSPL_API ratcompos( double* b, double* a, int n,
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double* c, double* d, int p,
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double* beta, double* alpha)
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{
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int k2, i, k, pn, pd, ln, ld, k2s, nk2s;
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double *num = NULL, *den = NULL, *ndn = NULL, *ndd = NULL;
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int res;
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if (!a || !b || !c || !d || !beta || !alpha)
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{
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res = ERROR_PTR;
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goto exit_label;
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}
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if(n < 1 || p < 1)
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{
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res = ERROR_SIZE;
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goto exit_label;
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}
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k2 = (n*p)+1;
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k2s = k2*sizeof(double); /* alpha and beta size */
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nk2s = (n+1)*k2*sizeof(double); /* num, den, ndn and ndd size */
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num = (double*)malloc(nk2s);
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den = (double*)malloc(nk2s);
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ndn = (double*)malloc(nk2s);
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ndd = (double*)malloc(nk2s);
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memset(num, 0, nk2s);
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memset(den, 0, nk2s);
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memset(ndn, 0, nk2s);
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memset(ndd, 0, nk2s);
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num[0] = den[0] = 1.0;
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pn = 0;
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ln = 1;
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for(i = 1; i < n+1; i++)
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{
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res = conv(num+pn, ln, c, p+1, num+pn+k2);
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if(res!=RES_OK)
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goto exit_label;
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res = conv(den+pn, ln, d, p+1, den+pn+k2);
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if(res!=RES_OK)
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goto exit_label;
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pn += k2;
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ln += p;
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}
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pn = 0;
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pd = n*k2;
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ln = 1;
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ld = k2;
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for (i = 0; i < n+1; i++)
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{
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res = conv(num + pn, ln, den + pd, ld, ndn + i*k2);
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if(res!=RES_OK)
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goto exit_label;
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ln += p;
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ld -= p;
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pn += k2;
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pd -= k2;
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}
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for (i = 0; i < n+1; i++)
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{
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for (k = 0; k < k2; k++)
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{
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ndd[i*k2 + k] = ndn[i*k2 + k] * a[i];
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ndn[i*k2 + k] *= b[i];
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}
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}
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memset(alpha, 0, k2s);
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memset(beta, 0, k2s);
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for (k = 0; k < k2; k++)
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{
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for (i = 0; i < n+1; i++)
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{
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beta[k] += ndn[i*k2 + k];
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alpha[k] += ndd[i*k2 + k];
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}
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}
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res = RES_OK;
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exit_label:
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if(num)
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free(num);
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if(den)
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free(den);
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if(ndn)
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free(ndn);
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if(ndd)
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free(ndd);
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return res;
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}
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@ -94,11 +94,13 @@ p_goertzel_cmplx goertzel_cmplx ;
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p_linspace linspace ;
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p_log_cmplx log_cmplx ;
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p_logspace logspace ;
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p_low2low low2low ;
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p_poly_z2a_cmplx poly_z2a_cmplx ;
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p_polyval polyval ;
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p_polyval_cmplx polyval_cmplx ;
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p_randn randn ;
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p_randu randu ;
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p_ratcompos ratcompos ;
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p_re2cmplx re2cmplx ;
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p_signal_pimp signal_pimp ;
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p_sin_cmplx sin_cmplx ;
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@ -220,11 +222,13 @@ void* dspl_load()
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LOAD_FUNC(linspace);
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LOAD_FUNC(log_cmplx);
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LOAD_FUNC(logspace);
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LOAD_FUNC(low2low);
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LOAD_FUNC(poly_z2a_cmplx);
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LOAD_FUNC(polyval);
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LOAD_FUNC(polyval_cmplx);
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LOAD_FUNC(randn);
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LOAD_FUNC(randu);
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LOAD_FUNC(ratcompos);
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LOAD_FUNC(re2cmplx);
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LOAD_FUNC(signal_pimp);
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LOAD_FUNC(sin_cmplx);
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@ -84,6 +84,7 @@ typedef struct
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#define ERROR_FFT_CREATE 0x06060318
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#define ERROR_FFT_SIZE 0x06062021
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#define ERROR_FILTER_A0 0x06100100
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#define ERROR_FILTER_FT 0x06100620
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#define ERROR_FILTER_ORD 0x06101518
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#define ERROR_FILTER_RP 0x06101816
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#define ERROR_FILTER_RS 0x06101819
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@ -521,6 +522,14 @@ DECLARE_FUNC(int, logspace, double
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COMMA int
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COMMA double*);
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//------------------------------------------------------------------------------
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DECLARE_FUNC(int, low2low, double* b
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COMMA double* a
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COMMA int ord
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COMMA double w0
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COMMA double w1
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COMMA double* beta
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COMMA double* alpha);
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//------------------------------------------------------------------------------
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DECLARE_FUNC(int, poly_z2a_cmplx, complex_t*
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COMMA int
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COMMA int
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@ -546,6 +555,15 @@ DECLARE_FUNC(int, randn, double*
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DECLARE_FUNC(int, randu, double*
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COMMA int);
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//------------------------------------------------------------------------------
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DECLARE_FUNC(int, ratcompos, double* b
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COMMA double* a
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COMMA int n
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COMMA double* c
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COMMA double* d
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COMMA int p
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COMMA double* beta
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COMMA double* alpha);
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//------------------------------------------------------------------------------
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DECLARE_FUNC(int, re2cmplx, double*
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COMMA int
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COMMA complex_t*);
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@ -94,11 +94,13 @@ p_goertzel_cmplx goertzel_cmplx ;
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p_linspace linspace ;
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p_log_cmplx log_cmplx ;
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p_logspace logspace ;
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p_low2low low2low ;
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p_poly_z2a_cmplx poly_z2a_cmplx ;
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p_polyval polyval ;
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p_polyval_cmplx polyval_cmplx ;
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p_randn randn ;
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p_randu randu ;
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p_ratcompos ratcompos ;
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p_re2cmplx re2cmplx ;
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p_signal_pimp signal_pimp ;
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p_sin_cmplx sin_cmplx ;
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@ -220,11 +222,13 @@ void* dspl_load()
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LOAD_FUNC(linspace);
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LOAD_FUNC(log_cmplx);
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LOAD_FUNC(logspace);
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LOAD_FUNC(low2low);
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LOAD_FUNC(poly_z2a_cmplx);
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LOAD_FUNC(polyval);
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LOAD_FUNC(polyval_cmplx);
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LOAD_FUNC(randn);
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LOAD_FUNC(randu);
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LOAD_FUNC(ratcompos);
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LOAD_FUNC(re2cmplx);
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LOAD_FUNC(signal_pimp);
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LOAD_FUNC(sin_cmplx);
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@ -84,6 +84,7 @@ typedef struct
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#define ERROR_FFT_CREATE 0x06060318
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#define ERROR_FFT_SIZE 0x06062021
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#define ERROR_FILTER_A0 0x06100100
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#define ERROR_FILTER_FT 0x06100620
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#define ERROR_FILTER_ORD 0x06101518
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#define ERROR_FILTER_RP 0x06101816
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#define ERROR_FILTER_RS 0x06101819
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@ -521,6 +522,14 @@ DECLARE_FUNC(int, logspace, double
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COMMA int
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COMMA double*);
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//------------------------------------------------------------------------------
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DECLARE_FUNC(int, low2low, double* b
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COMMA double* a
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COMMA int ord
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COMMA double w0
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COMMA double w1
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COMMA double* beta
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COMMA double* alpha);
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//------------------------------------------------------------------------------
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DECLARE_FUNC(int, poly_z2a_cmplx, complex_t*
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COMMA int
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COMMA int
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@ -546,6 +555,15 @@ DECLARE_FUNC(int, randn, double*
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DECLARE_FUNC(int, randu, double*
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COMMA int);
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//------------------------------------------------------------------------------
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DECLARE_FUNC(int, ratcompos, double* b
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COMMA double* a
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COMMA int n
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COMMA double* c
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COMMA double* d
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COMMA int p
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COMMA double* beta
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COMMA double* alpha);
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//------------------------------------------------------------------------------
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DECLARE_FUNC(int, re2cmplx, double*
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COMMA int
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COMMA complex_t*);
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