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

/*

 * Copyright 2005,2010 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_fft_filter_fff.h>

#include <gri_fft_filter_fff_generic.h>

#include <gr_io_signature.h>

#include <assert.h>

#include <stdexcept>

#include <cstdio>

#include <iostream>

#include <string.h>

gr_fft_filter_fff_sptr gr_make_fft_filter_fff (int decimation, const std::vector<float> &taps)

{

  return gr_fft_filter_fff_sptr (new gr_fft_filter_fff (decimation, taps));

}

gr_fft_filter_fff::gr_fft_filter_fff (int decimation, const std::vector<float> &taps)

  : gr_sync_decimator ("fft_filter_fff",

                       gr_make_io_signature (1, 1, sizeof (float)),

                       gr_make_io_signature (1, 1, sizeof (float)),

                       decimation),

    d_updated(false)

{

  set_history(1);

  d_filter = new gri_fft_filter_fff_generic(decimation, taps);

  d_nsamples = d_filter->set_taps(taps);

  set_output_multiple(d_nsamples);

}

gr_fft_filter_fff::~gr_fft_filter_fff ()

{

  delete d_filter;

}

void

gr_fft_filter_fff::set_taps (const std::vector<float> &taps)

{

  d_new_taps = taps;

  d_updated = true;

}

int

gr_fft_filter_fff::work (int noutput_items,

                         gr_vector_const_void_star &input_items,

                         gr_vector_void_star &output_items)

{

  const float *in = (const float *) input_items[0];

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

  if (d_updated){

    d_nsamples = d_filter->set_taps(d_new_taps);

    d_updated = false;

    set_output_multiple(d_nsamples);

    return 0;                                // output multiple may have changed

  }

  assert(noutput_items % d_nsamples == 0);

  d_filter->filter(noutput_items, in, out);

  //assert((out - (float *) output_items[0]) == noutput_items);

  return noutput_items;

}