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/* -*- c++ -*- */
/*
* Copyright 2015 Sylvain Munaut <tnt@246tNt.com>
*
* 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 <inttypes.h>
#include <string.h>
#include <cstdio>
#include <gnuradio/io_signature.h>
#include "rach_file_sink_impl.h"
namespace gr {
namespace gmr1 {
rach_file_sink::sptr
rach_file_sink::make(const std::string &filename,
const double center_freq, const double sample_rate)
{
return gnuradio::get_initial_sptr(
new rach_file_sink_impl(filename, center_freq, sample_rate)
);
}
rach_file_sink_impl::rach_file_sink_impl(const std::string &filename,
const double center_freq,
const double sample_rate)
: gr::block("rach_file_sink",
io_signature::make(0, 0, 0),
io_signature::make(0, 0, 0)),
d_filename(filename),
d_center_freq(center_freq), d_sample_rate(sample_rate)
{
message_port_register_in(PDU_PORT_ID);
set_msg_handler(PDU_PORT_ID, boost::bind(&rach_file_sink_impl::send_pdu, this, _1));
this->d_fh = fopen(filename.c_str(), "a");
if (!this->d_fh)
throw std::runtime_error("Unable to open output file");
}
rach_file_sink_impl::~rach_file_sink_impl()
{
fclose(this->d_fh);
}
std::string
rach_file_sink_impl::filename() const
{
return this->d_filename;
}
double
rach_file_sink_impl::center_freq() const
{
return this->d_center_freq;
}
double
rach_file_sink_impl::sample_rate() const
{
return this->d_sample_rate;
}
void
rach_file_sink_impl::set_center_freq(const double center_freq)
{
this->d_center_freq = center_freq;
}
void
rach_file_sink_impl::set_sample_rate(const double sample_rate)
{
this->d_sample_rate = sample_rate;
}
bool
rach_file_sink_impl::start()
{
/* Nothing yet */
}
bool
rach_file_sink_impl::stop()
{
fflush(this->d_fh);
}
void
rach_file_sink_impl::send_pdu(pmt::pmt_t pdu)
{
static const pmt::pmt_t key_sb_mask = pmt::string_to_symbol("sb_mask");
static const pmt::pmt_t key_freq = pmt::string_to_symbol("freq");
static const pmt::pmt_t key_time = pmt::string_to_symbol("time");
pmt::pmt_t meta = pmt::car(pdu);
pmt::pmt_t vector = pmt::cdr(pdu);
size_t len = pmt::length(vector);
size_t offset(0);
const uint8_t* rach = (const uint8_t*) pmt::uniform_vector_elements(vector, offset);
/* Validate */
if (!is_dict(meta) ||
!dict_has_key(meta, key_sb_mask) ||
!dict_has_key(meta, key_freq))
throw std::runtime_error("Invalid RACH PDU");
/* If we have time, start with it */
if (dict_has_key(meta, key_freq))
{
uint64_t time = pmt::to_uint64(pmt::dict_ref(meta, key_time, pmt::PMT_NIL));
fprintf(this->d_fh, "%" PRIu64 " ", time);
}
/* Grab SB_Mask & freq */
uint8_t sb_mask = pmt::to_long(pmt::dict_ref(meta, key_sb_mask, pmt::PMT_NIL));
double freq = pmt::to_double(pmt::dict_ref(meta, key_freq, pmt::PMT_NIL));
fprintf(this->d_fh, "%02hhx %.17g %.17g ",
sb_mask,
freq,
this->d_center_freq + (this->d_sample_rate * freq / (2.0 * M_PI))
);
/* Raw bytes */
for (int i=0; i<len; i++)
fprintf(this->d_fh, "%02hhx", rach[i]);
/* EOL */
fprintf(this->d_fh, "\n");
}
} // namespace gmr1
} // namespace gr
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