lib/misc_utils/burst_source_impl.cc

/* -*- c++ -*- */
/* @file
 * @author Roman Khassraf <rkhassraf@gmail.com>
 * @section LICENSE
 *
 * Gr-gsm 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.
 *
 * Gr-gsm 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 gr-gsm; 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 "burst_source_impl.h"
#include "stdio.h"

#define PMT_SIZE 174

namespace gr {
  namespace gsm {

    burst_source::sptr
    burst_source::make(const std::string &filename)
    {
      return gnuradio::get_initial_sptr
        (new burst_source_impl(filename));
    }

    /*
     * The private constructor
     */
    burst_source_impl::burst_source_impl(const std::string &filename)
      : gr::block("burst_source",
              gr::io_signature::make(0, 0, 0),
              gr::io_signature::make(0, 0, 0)),
              d_input_file(filename.c_str(), std::ifstream::binary),
              d_finished(false)
    {
        message_port_register_out(pmt::mp("out"));
    }

    /*
     * Our virtual destructor.
     */
    burst_source_impl::~burst_source_impl()
    {
        if (d_finished == false){
            d_finished = true;
        }
    }

    bool burst_source_impl::start()
    {
        d_finished = false;
        d_thread = boost::shared_ptr<gr::thread::thread>
            (new gr::thread::thread(boost::bind(&burst_source_impl::run, this)));
        return block::start();
    }

    bool burst_source_impl::stop()
    {
        d_finished = true;
        d_thread->interrupt();
        d_thread->join();
        return block::stop();
    }

    bool burst_source_impl::finished()
    {
        return d_finished;
    }

    void burst_source_impl::run()
    {
        char *unserialized = (char*)malloc(sizeof(char) * PMT_SIZE);
        while (d_input_file.read(unserialized, PMT_SIZE) && !d_finished)
        {
            if (d_input_file.bad())
            {
                break;
            }

            std::string s(unserialized, PMT_SIZE);
            pmt::pmt_t burst = pmt::deserialize_str(s);
            message_port_pub(pmt::mp("out"), burst);
        }
        d_input_file.close();
        post(pmt::mp("system"), pmt::cons(pmt::mp("done"), pmt::from_long(1)));
    }
  } /* namespace gsm */
} /* namespace gr */