/* -*- c++ -*- */

/*

 * Copyright 2010 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 <gr_burst_tagger.h>

#include <gr_io_signature.h>

#include <string.h>

gr_burst_tagger_sptr

gr_make_burst_tagger(size_t itemsize)

{

  return gnuradio::get_initial_sptr(new gr_burst_tagger(itemsize));

}

gr_burst_tagger::gr_burst_tagger(size_t itemsize)

  : gr_sync_block ("burst_tagger",

                   gr_make_io_signature2 (2, 2, itemsize, sizeof(short)),

                   gr_make_io_signature (1, 1, itemsize)),

    d_itemsize(itemsize), d_state(false)

{

  std::stringstream str;

  str << name() << unique_id();

  d_key = pmt::pmt_string_to_symbol("burst");

  d_id  = pmt::pmt_string_to_symbol(str.str());

}

gr_burst_tagger::~gr_burst_tagger()

{

}

int

gr_burst_tagger::work(int noutput_items,

                      gr_vector_const_void_star &input_items,

                      gr_vector_void_star &output_items)

{

  const char *signal  = (const char*)input_items[0];

  const short *trigger = (const short*)input_items[1];

  char *out = (char*)output_items[0];

  memcpy(out, signal, noutput_items * d_itemsize);

  for(int i = 0; i < noutput_items; i++) {

    if(trigger[i] > 0) {

      if(d_state == false) {

        d_state = true;

        pmt::pmt_t value = pmt::PMT_T;

        add_item_tag(0, nitems_written(0)+i, d_key, value, d_id);

      }

    }

    else {

      if(d_state == true) {

        d_state = false;

        pmt::pmt_t value = pmt::PMT_F;

        add_item_tag(0, nitems_written(0)+i, d_key, value, d_id);

      }

    }

  }

  return noutput_items;

}