gr_iir_filter_ffd.h

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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2004 Free Software Foundation, Inc.
00004  * 
00005  * This file is part of GNU Radio
00006  * 
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  * 
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 
00023 #ifndef INCLUDED_GR_IIR_FILTER_FFD_H
00024 #define INCLUDED_GR_IIR_FILTER_FFD_H
00025 
00026 #include <gr_sync_block.h>
00027 #include <gri_iir.h>
00028 #include <stdexcept>
00029 
00030 class gr_iir_filter_ffd;
00031 typedef boost::shared_ptr<gr_iir_filter_ffd> gr_iir_filter_ffd_sptr;
00032 gr_iir_filter_ffd_sptr 
00033 gr_make_iir_filter_ffd (const std::vector<double> &fftaps,
00034                         const std::vector<double> &fbtaps) throw (std::invalid_argument);
00035 
00059 class gr_iir_filter_ffd : public gr_sync_block
00060 {
00061  private:
00062   friend gr_iir_filter_ffd_sptr 
00063   gr_make_iir_filter_ffd (const std::vector<double> &fftaps,
00064                           const std::vector<double> &fbtaps) throw (std::invalid_argument);
00065 
00066   gri_iir<float,float,double>           d_iir;
00067   std::vector<double>                   d_new_fftaps;
00068   std::vector<double>                   d_new_fbtaps;
00069   bool                                  d_updated;
00070 
00074   gr_iir_filter_ffd (const std::vector<double> &fftaps,
00075                      const std::vector<double> &fbtaps) throw (std::invalid_argument);
00076 
00077  public:
00078   ~gr_iir_filter_ffd ();
00079 
00080   void set_taps (const std::vector<double> &fftaps,
00081                  const std::vector<double> &fbtaps) throw (std::invalid_argument);
00082 
00083   int work (int noutput_items,
00084             gr_vector_const_void_star &input_items,
00085             gr_vector_void_star &output_items);
00086 };
00087 
00088 #endif

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