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/*---------------------------------------------------------------------------*\
FILE........: freedv_700d_rx.c
AUTHOR......: David Rowe
DATE CREATED: April 2021
Demo receive program for FreeDV API (700D mode), see freedv_700d_tx.c for
instructions.
\*---------------------------------------------------------------------------*/
/*
Copyright (C) 2021 David Rowe
All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License version 2.1, as
published by the Free Software Foundation. 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 Lesser General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include "freedv_api.h"
int main(int argc, char *argv[]) {
struct freedv *freedv;
freedv = freedv_open(FREEDV_MODE_700D);
assert(freedv != NULL);
/* note API functions to tell us how big our buffers need to be */
short speech_out[freedv_get_n_max_speech_samples(freedv)];
short demod_in[freedv_get_n_max_modem_samples(freedv)];
size_t nin, nout;
nin = freedv_nin(freedv);
while (fread(demod_in, sizeof(short), nin, stdin) == nin) {
nout = freedv_rx(freedv, speech_out, demod_in);
nin = freedv_nin(freedv); /* call me on every loop! */
fwrite(speech_out, sizeof(short), nout, stdout);
}
freedv_close(freedv);
return 0;
}
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