/* -*- c++ -*- */
/*
 * Copyright 2012 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 "repeat_impl.h"
#include <gnuradio/io_signature.h>

namespace gr {
namespace blocks {

repeat::sptr repeat::make(size_t itemsize, int interp)
{
    return gnuradio::get_initial_sptr(new repeat_impl(itemsize, interp));
}

repeat_impl::repeat_impl(size_t itemsize, int interp)
    : sync_interpolator("repeat",
                        io_signature::make(1, 1, itemsize),
                        io_signature::make(1, 1, itemsize),
                        interp),
      d_itemsize(itemsize),
      d_interp(interp)
{
    message_port_register_in(pmt::mp("interpolation"));
    set_msg_handler(pmt::mp("interpolation"),
                    boost::bind(&repeat_impl::msg_set_interpolation, this, _1));
}

void repeat_impl::msg_set_interpolation(pmt::pmt_t msg)
{
    // Dynamization by Kevin McQuiggin:
    d_interp = pmt::to_long(pmt::cdr(msg));
    sync_interpolator::set_interpolation(d_interp);
}
void repeat_impl::set_interpolation(int interp)
{
    // This ensures that interpolation is only changed between calls to work
    // (and not in the middle of an ongoing work)
    _post(pmt::mp("interpolation"),                                   /* port */
          pmt::cons(pmt::mp("interpolation"), pmt::from_long(interp)) /* pair */
    );
}

int repeat_impl::work(int noutput_items,
                      gr_vector_const_void_star& input_items,
                      gr_vector_void_star& output_items)
{
    const char* in = (const char*)input_items[0];
    char* out = (char*)output_items[0];

    for (int i = 0; i < noutput_items / d_interp; i++) {
        for (int j = 0; j < d_interp; j++) {
            memcpy(out, in, d_itemsize);
            out += d_itemsize;
        }

        in += d_itemsize;
    }

    return noutput_items;
}

} /* namespace blocks */
} /* namespace gr */
