mirror of
https://github.com/VK3FNG/soundmodem.git
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71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
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/*****************************************************************************/
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/*
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* gentbl.c -- Soundmodem table generator.
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*
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* Copyright (C) 1996-2001
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* Thomas Sailer (t.sailer@alumni.ethz.ch)
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*
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* This program 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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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <math.h>
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#include <string.h>
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#include <stdlib.h>
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/* -------------------------------------------------------------------- */
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static const char *progname;
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/* -------------------------------------------------------------------- */
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static void gen_costab(unsigned size)
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{
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FILE *f;
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int i;
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if (!(f = fopen("costab.c", "w"))) {
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fprintf(stderr, "cannot open file costab.c\n");
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exit(1);
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}
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fprintf(f, "#include \"costab.h\"\n\n/*\n * cosine table\n */\n\n"
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"const int16_t afsk_costab[%d] = {", size);
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for (i = 0; i < size; i++) {
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if (!(i & 7))
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fprintf(f, "\n\t");
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fprintf(f, "%6d", (int)(32767.0*cos(i*(2.0*M_PI)/size)));
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if (i != (size-1))
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fprintf(f, ", ");
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}
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fprintf(f, "\n};\n\n");
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}
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/* -------------------------------------------------------------------- */
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int main(int argc, char *argv[])
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{
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progname = argv[0];
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gen_costab(512);
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exit(0);
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}
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/* -------------------------------------------------------------------- */
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