gr_iir_filter_ffd.h

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/* -*- c++ -*- */
/*
 * Copyright 2004 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 2, 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef INCLUDED_GR_IIR_FILTER_FFD_H
#define INCLUDED_GR_IIR_FILTER_FFD_H

#include <gr_sync_block.h>
#include <gri_iir.h>
#include <stdexcept>

class gr_iir_filter_ffd;
typedef boost::shared_ptr<gr_iir_filter_ffd> gr_iir_filter_ffd_sptr;
gr_iir_filter_ffd_sptr 
gr_make_iir_filter_ffd (const std::vector<double> &fftaps,
                        const std::vector<double> &fbtaps) throw (std::invalid_argument);

class gr_iir_filter_ffd : public gr_sync_block
{
 private:
  friend gr_iir_filter_ffd_sptr 
  gr_make_iir_filter_ffd (const std::vector<double> &fftaps,
                          const std::vector<double> &fbtaps) throw (std::invalid_argument);

  gri_iir<float,float,double>           d_iir;
  std::vector<double>                   d_new_fftaps;
  std::vector<double>                   d_new_fbtaps;
  bool                                  d_updated;

  gr_iir_filter_ffd (const std::vector<double> &fftaps,
                     const std::vector<double> &fbtaps) throw (std::invalid_argument);

 public:
  ~gr_iir_filter_ffd ();

  void set_taps (const std::vector<double> &fftaps,
                 const std::vector<double> &fbtaps) throw (std::invalid_argument);

  int work (int noutput_items,
            gr_vector_const_void_star &input_items,
            gr_vector_void_star &output_items);
};

#endif

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