mirror of
https://github.com/JvanKatwijk/dab-cmdline
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82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
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#
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/*
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* Copyright (C) 2011, 2012, 2013
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* Jan van Katwijk (J.vanKatwijk@gmail.com)
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* Lazy Chair Computing
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*
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* This file is part of the SDR-J
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* Many of the ideas as implemented in SDR-J are derived from
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* other work, made available through the GNU general Public License.
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* All copyrights of the original authors are recognized.
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*
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* SDR-J 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 2 of the License, or
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* (at your option) any later version.
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*
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* SDR-J 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 SDR-J; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#
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#ifndef __SOUND_CONSTANTS
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#define __SOUND_CONSTANTS
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#include <math.h>
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#include <complex>
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#include <stdint.h>
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#include <unistd.h>
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#include <limits>
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#include "stdlib.h"
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using namespace std;
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#include <malloc.h>
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#ifdef __MINGW32__
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#include "windows.h"
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#else
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#include "alloca.h"
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#endif
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/*
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*/
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typedef float DSPFLOAT;
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typedef std::complex<DSPFLOAT> DSPCOMPLEX;
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#define MINIMUM(x, y) ((x) < (y) ? x : y)
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#define MAXIMUM(x, y) ((x) > (y) ? x : y)
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// common, simple but useful, functions
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static inline
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bool isIndeterminate (DSPFLOAT x) {
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return x != x;
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}
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static inline
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bool isInfinite (double x) {
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return x == numeric_limits<DSPFLOAT>::infinity ();
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}
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//
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static inline
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DSPCOMPLEX cmul (DSPCOMPLEX x, float y) {
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return DSPCOMPLEX (real (x) * y, imag (x) * y);
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}
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static inline
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DSPCOMPLEX cdiv (DSPCOMPLEX x, float y) {
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return DSPCOMPLEX (real (x) / y, imag (x) / y);
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}
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static inline
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float get_db (DSPFLOAT x) {
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return 20 * log10 ((x + 1) / (float)(256 * 65536));
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}
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#endif
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