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/*---------------------------------------------------------------------------*\
FILE........: vhf_deframe_c2.c
AUTHOR......: Brady O'Brien
DATE CREATED: 8 March 2016
C tool to extract codec2 data from freedv VHF 2400A/B/whatever frames
\*---------------------------------------------------------------------------*/
/*
Copyright (C) 2016 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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "freedv_vhf_framing.h"
int main(int argc, char *argv[]) {
struct freedv_vhf_deframer *deframer;
FILE *fin, *fout;
uint8_t *bitbuf;
uint8_t *c2buf;
uint8_t zbuf[] = {0, 0, 0, 0, 0, 0, 0, 0};
int frame_fmt = 0;
int fsize, c2size;
if (argc < 3) {
fprintf(stderr, "usage: %s (A|B) InputOneBitPerCharFile OutputC2File\n",
argv[0]);
exit(1);
}
if (strcmp(argv[1], "A") == 0) {
frame_fmt = FREEDV_VHF_FRAME_A;
} else if (strcmp(argv[1], "B") == 0) {
frame_fmt = FREEDV_HF_FRAME_B;
} else {
fprintf(stderr, "usage: %s (A|B) InputOneBitPerCharFile OutputC2File\n",
argv[0]);
exit(1);
}
/* Open files */
if (strcmp(argv[2], "-") == 0) {
fin = stdin;
} else {
fin = fopen(argv[2], "r");
}
if (strcmp(argv[3], "-") == 0) {
fout = stdout;
} else {
fout = fopen(argv[3], "w");
}
/* Set up deframer */
deframer = fvhff_create_deframer(frame_fmt, 0);
if (fin == NULL || fout == NULL || deframer == NULL) {
fprintf(stderr, "Couldn't open test vector files\n");
goto cleanup;
}
c2size = fvhff_get_codec2_size(deframer);
fsize = fvhff_get_frame_size(deframer);
/* allocate buffers for processing */
bitbuf = (uint8_t *)malloc(sizeof(uint8_t) * fsize);
c2buf = (uint8_t *)malloc(sizeof(uint8_t) * c2size);
/* Deframe! */
while (fread(bitbuf, sizeof(uint8_t), fsize, fin) == fsize) {
if (fvhff_deframe_bits(deframer, c2buf, NULL, NULL, bitbuf))
fwrite(c2buf, sizeof(uint8_t), c2size, fout);
else
fwrite(zbuf, sizeof(uint8_t), c2size, fout);
if (fout == stdin) {
fflush(fout);
}
}
fprintf(stderr, "BER Estimate: %f total_uw_err: %d \n",
((float)deframer->total_uw_err) / ((float)deframer->total_uw_bits),
deframer->total_uw_err);
free(bitbuf);
free(c2buf);
cleanup:
fclose(fin);
fclose(fout);
fvhff_destroy_deframer(deframer);
exit(0);
}
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