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

/*

 * Copyright 2004,2010,2012 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.

 */

/* @WARNING@ */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include "@IMPL_NAME@.h"

#include <gr_io_signature.h>

#include <volk/volk.h>

namespace gr {

  namespace filter {

    @BASE_NAME@::sptr

    @BASE_NAME@::make(int decimation, const std::vector<@TAP_TYPE@> &taps)

    {

      return gnuradio::get_initial_sptr(new @IMPL_NAME@

					(decimation, taps));

    }

    @IMPL_NAME@::@IMPL_NAME@(int decimation, const std::vector<@TAP_TYPE@> &taps)

      : gr_sync_decimator("@BASE_NAME@",

			  gr_make_io_signature(1, 1, sizeof(@I_TYPE@)),

			  gr_make_io_signature(1, 1, sizeof(@O_TYPE@)),

			  decimation)

    {

      d_fir = new kernel::@BASE_NAME@(decimation, taps);

      d_updated = false;

      set_history(d_fir->ntaps());

      const int alignment_multiple =

	volk_get_alignment() / sizeof(float);

      set_alignment(std::max(1, alignment_multiple));

    }

    @IMPL_NAME@::~@IMPL_NAME@()

    {

      delete d_fir;

    }

    void

    @IMPL_NAME@::set_taps(const std::vector<@TAP_TYPE@> &taps)

    {

      d_fir->set_taps(taps);

      d_updated = true;

    }

    std::vector<@TAP_TYPE@>

    @IMPL_NAME@::taps() const

    {

      return d_fir->taps();

    }

    int

    @IMPL_NAME@::work(int noutput_items,

		      gr_vector_const_void_star &input_items,

		      gr_vector_void_star &output_items)

    {

      const @I_TYPE@ *in = (const @I_TYPE@*)input_items[0];

      @O_TYPE@ *out = (@O_TYPE@*)output_items[0];

      if (d_updated) {

	set_history(d_fir->ntaps());

	d_updated = false;

	return 0;	     // history requirements may have changed.

      }

      if (decimation() == 1) {

	d_fir->filterN(out, in, noutput_items);

      }

      else {

	d_fir->filterNdec(out, in, noutput_items,

			  decimation());

      }

      return noutput_items;

    }

  } /* namespace filter */

} /* namespace gr */