mirror of https://github.com/drowe67/codec2.git
64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: freedv_datac1_rx.c
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AUTHOR......: David Rowe
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DATE CREATED: April 2021
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Demonstrates receiving frames of raw data bytes using the FreeDV API.
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See freedv_datac1_tx.c for instructions.
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\*---------------------------------------------------------------------------*/
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/*
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Copyright (C) 2021 David Rowe
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All rights reserved.
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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 Lesser General Public License version 2.1, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "freedv_api.h"
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int main(int argc, char *argv[]) {
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struct freedv *freedv;
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freedv = freedv_open(FREEDV_MODE_DATAC1);
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assert(freedv != NULL);
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freedv_set_frames_per_burst(freedv, 1);
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freedv_set_verbose(freedv, 2);
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int bytes_per_modem_frame = freedv_get_bits_per_modem_frame(freedv) / 8;
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uint8_t bytes_out[bytes_per_modem_frame];
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short demod_in[freedv_get_n_max_modem_samples(freedv)];
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size_t nin, nbytes_out;
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nin = freedv_nin(freedv);
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while (fread(demod_in, sizeof(short), nin, stdin) == nin) {
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nbytes_out = freedv_rawdatarx(freedv, bytes_out, demod_in);
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nin = freedv_nin(freedv); /* must call this every loop */
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if (nbytes_out) {
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/* don't output CRC */
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fwrite(bytes_out, sizeof(uint8_t), nbytes_out - 2, stdout);
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}
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}
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freedv_close(freedv);
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return 0;
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}
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