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/* -*- c++ -*- */
/* Copyright 2016 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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.
*
* GNU Radio 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 GNU Radio; 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 <iostream>
#include <iomanip>
#include <string.h>
#include <volk/volk.h>
#include <gnuradio/digital/header_format_counter.h>
#include <gnuradio/digital/header_buffer.h>
#include <gnuradio/math.h>
namespace gr {
namespace digital {
header_format_counter::sptr
header_format_counter::make(const std::string &access_code,
int threshold, int bps)
{
return header_format_counter::sptr
(new header_format_counter(access_code, threshold, bps));
}
header_format_counter::header_format_counter(const std::string &access_code,
int threshold, int bps)
: header_format_default(access_code, threshold, bps)
{
d_counter = 0;
}
header_format_counter::~header_format_counter()
{
}
bool
header_format_counter::format(int nbytes_in,
const unsigned char *input,
pmt::pmt_t &output,
pmt::pmt_t &info)
{
uint8_t* bytes_out = (uint8_t*)volk_malloc(header_nbytes(),
volk_get_alignment());
header_buffer header(bytes_out);
header.add_field64(d_access_code, d_access_code_len);
header.add_field16((uint16_t)(nbytes_in));
header.add_field16((uint16_t)(nbytes_in));
header.add_field16((uint16_t)(d_bps));
header.add_field16((uint16_t)(d_counter));
// Package output data into a PMT vector
output = pmt::init_u8vector(header_nbytes(), bytes_out);
// Creating the output pmt copies data; free our own here.
volk_free(bytes_out);
d_counter++;
return true;
}
size_t
header_format_counter::header_nbits() const
{
return d_access_code_len + 8*4*sizeof(uint16_t);
}
bool
header_format_counter::header_ok()
{
// confirm that two copies of header info are identical
uint16_t len0 = d_hdr_reg.extract_field16(0);
uint16_t len1 = d_hdr_reg.extract_field16(16);
return (len0 ^ len1) == 0;
}
int
header_format_counter::header_payload()
{
uint16_t len = d_hdr_reg.extract_field16(0);
uint16_t bps = d_hdr_reg.extract_field16(32);
uint16_t counter = d_hdr_reg.extract_field16(48);
d_bps = bps;
d_info = pmt::make_dict();
d_info = pmt::dict_add(d_info, pmt::intern("payload symbols"),
pmt::from_long(8*len / d_bps));
d_info = pmt::dict_add(d_info, pmt::intern("bps"),
pmt::from_long(bps));
d_info = pmt::dict_add(d_info, pmt::intern("counter"),
pmt::from_long(counter));
return static_cast<int>(len);
}
} /* namespace digital */
} /* namespace gr */
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