/* -*- c++ -*- */
/*
 * Copyright 2004,2010,2012,2014 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 "iir_filter_ccd_impl.h"
#include <gnuradio/io_signature.h>

namespace gr {
namespace filter {

iir_filter_ccd::sptr iir_filter_ccd::make(const std::vector<double>& fftaps,
                                          const std::vector<double>& fbtaps,
                                          bool oldstyle)
{
    return gnuradio::get_initial_sptr(new iir_filter_ccd_impl(fftaps, fbtaps, oldstyle));
}

iir_filter_ccd_impl::iir_filter_ccd_impl(const std::vector<double>& fftaps,
                                         const std::vector<double>& fbtaps,
                                         bool oldstyle)

    : sync_block("iir_filter_ccd",
                 io_signature::make(1, 1, sizeof(gr_complex)),
                 io_signature::make(1, 1, sizeof(gr_complex))),
      d_updated(false)
{
    d_iir = new kernel::iir_filter<gr_complex, gr_complex, double, gr_complexd>(
        fftaps, fbtaps, oldstyle);
}

iir_filter_ccd_impl::~iir_filter_ccd_impl() { delete d_iir; }

void iir_filter_ccd_impl::set_taps(const std::vector<double>& fftaps,
                                   const std::vector<double>& fbtaps)
{
    d_new_fftaps = fftaps;
    d_new_fbtaps = fbtaps;
    d_updated = true;
}

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

    if (d_updated) {
        d_iir->set_taps(d_new_fftaps, d_new_fbtaps);
        d_updated = false;
    }

    d_iir->filter_n(out, in, noutput_items);
    return noutput_items;
};

} /* namespace filter */
} /* namespace gr */
