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demod_eia.c
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demod_eia.c
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/*
* demod_eia.c
*
* Copyright (C) 2013
* Elias Oenal (EliasOenal@gmail.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define SAMPLE_RATE 22050
#define PHINC(x) ((x)*0x10000/SAMPLE_RATE)
#include "multimon.h"
static const unsigned int eia_freq[16] = {
PHINC(600), PHINC(741), PHINC(882), PHINC(1023),
PHINC(1164), PHINC(1305), PHINC(1446), PHINC(1587),
PHINC(1728), PHINC(1869), PHINC(2151), PHINC(2433),
PHINC(2010), PHINC(2292), PHINC(459), PHINC(1091)
};
/* ---------------------------------------------------------------------- */
static void eia_init(struct demod_state *s)
{
selcall_init(s);
}
static void eia_deinit(struct demod_state *s)
{
selcall_deinit(s);
}
static void eia_demod(struct demod_state *s, buffer_t buffer, int length)
{
selcall_demod(s, buffer.fbuffer, length, eia_freq, demod_eia.name);
}
const struct demod_param demod_eia = {
"EIA", true, SAMPLE_RATE, 0, eia_init, eia_demod, eia_deinit
};