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/* -*- c++ -*- */
/*
* DSTAR Encoder (C) Copyright 2017 Max H. Parke KA1RBI
*
* This file is part of OP25
*
* This 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 3, or (at your option)
* any later version.
*
* This software 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 software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gnuradio/io_signature.h>
#include "mbelib.h"
#include "p25p2_vf.h"
#include "dstar_tx_sb_impl.h"
// #include "dstar_const.h"
#include <op25_imbe_frame.h>
#include <vector>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <assert.h>
#if 0
static inline void print_result(char title[], const uint8_t r[], int len) {
uint8_t buf[256];
for (int i=0; i<len; i++){
buf[i] = r[i] + '0';
}
buf[len] = 0;
printf("%s: %s\n", title, buf);
}
#endif
static const uint8_t FS[24] = { 1,0,1,0,1,0,1,0,1,0,1,1,0,1,0,0,0,1,1,0,1,0,0,0 };
static const uint8_t FS_DUMMY[24] = { 0,0,0,0,1,1,1,1,0,0,0,0,1,1,1,1,0,0,0,0,1,1,1,1 };
namespace gr {
namespace op25_repeater {
dstar_tx_sb::sptr
dstar_tx_sb::make(int verbose_flag, const char * config_file, bool fullrate_mode)
{
return gnuradio::get_initial_sptr
(new dstar_tx_sb_impl(verbose_flag, config_file, fullrate_mode));
}
//////////////////////////////////////////////////////////////////////////
static const int MIN_IN = 1;
static const int MAX_IN = 1;
static const int MIN_OUT = 1;
static const int MAX_OUT = 1;
/*
* The private constructor
*/
dstar_tx_sb_impl::dstar_tx_sb_impl(int verbose_flag, const char * config_file, bool fullrate_mode)
: gr::block("dstar_tx_sb",
gr::io_signature::make (MIN_IN, MAX_IN, sizeof(short)),
gr::io_signature::make (MIN_OUT, MAX_OUT, sizeof(char))),
d_verbose_flag(verbose_flag),
d_config_file(config_file),
d_frame_counter(0)
{
set_output_multiple(96);
d_encoder.set_dstar_mode();
config();
}
/*
* Our virtual destructor.
*/
dstar_tx_sb_impl::~dstar_tx_sb_impl()
{
}
void
dstar_tx_sb_impl::config()
{
FILE * fp1 = fopen(d_config_file, "r");
char line[256];
char * cp;
if (!fp1) {
fprintf(stderr, "dstar_tx_sb_impl:config: failed to open %s\n", d_config_file);
return;
}
for (;;) {
cp = fgets(line, sizeof(line) - 2, fp1);
if (!cp) break;
if (line[0] == '#') continue;
#if 0
if (memcmp(line, "ft=", 3) == 0)
sscanf(&line[3], "%d", &d_ft);
#endif
}
fclose(fp1);
}
void
dstar_tx_sb_impl::forecast(int nof_output_items, gr_vector_int &nof_input_items_reqd)
{
// each 96-bit output frame contains one voice code word=160 samples input
const size_t nof_inputs = nof_input_items_reqd.size();
const int nof_vcw = nof_output_items / 96.0;
const int nof_samples_reqd = nof_vcw * 160;
std::fill(&nof_input_items_reqd[0], &nof_input_items_reqd[nof_inputs], nof_samples_reqd);
}
int
dstar_tx_sb_impl::general_work (int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int nconsumed = 0;
int16_t *in;
in = (int16_t *) input_items[0];
uint8_t *out = reinterpret_cast<uint8_t*>(output_items[0]);
int nframes=0;
for (int n=0;n < (noutput_items/96);n++) {
// need (at least) one voice codeword worth of samples
if (ninput_items[0] - nconsumed < 160)
break;
d_encoder.encode(in, out);
if (d_frame_counter == 0)
memcpy(out+72, FS, 24);
else
memcpy(out+72, FS_DUMMY, 24);
d_frame_counter += 1;
d_frame_counter = (d_frame_counter + 1) % 21;
in += 160;
nconsumed += 160;
nframes += 1;
out += 96;
}
// Tell runtime system how many input items we consumed on
// each input stream.
if (nconsumed)
consume_each(nconsumed);
// Tell runtime system how many output items we produced.
return (nframes * 96);
}
} /* namespace op25_repeater */
} /* namespace gr */
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