git.gag.com Git - debian/gnuradio/blob - gnuradio-core/src/lib/filter/gr_pfb_synthesis_filterbank_ccf.h

   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright 2010 Free Software Foundation, Inc.
   4  *
   5  * This file is part of GNU Radio
   6  *
   7  * GNU Radio is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3, or (at your option)
  10  * any later version.
  11  *
  12  * GNU Radio is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Radio; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street,
  20  * Boston, MA 02110-1301, USA.
  21  */
  22
  23
  24 #ifndef INCLUDED_GR_PFB_SYNTHESIS_FILTERBANK_CCF_H
  25 #define INCLUDED_GR_PFB_SYNTHESIS_FILTERBANK_CCF_H
  26
  27 #include <gr_sync_interpolator.h>
  28 #include <gri_fir_filter_with_buffer_ccf.h>
  29
  30 class gr_pfb_synthesis_filterbank_ccf;
  31 typedef boost::shared_ptr<gr_pfb_synthesis_filterbank_ccf> gr_pfb_synthesis_filterbank_ccf_sptr;
  32 gr_pfb_synthesis_filterbank_ccf_sptr gr_make_pfb_synthesis_filterbank_ccf
  33     (unsigned int numchans, const std::vector<float> &taps);
  34
  35 class gr_fir_ccf;
  36 class gri_fft_complex;
  37
  38
  39 /*!
  40  * \class gr_pfb_synthesis_filterbank_ccf
  41  *
  42  * \brief Polyphase synthesis filterbank with
  43  *        gr_complex input, gr_complex output and float taps
  44  *
  45  * \ingroup filter_blk
  46  */
  47
  48 class gr_pfb_synthesis_filterbank_ccf : public gr_sync_interpolator
  49 {
  50  private:
  51   /*!
  52    * Build the polyphase synthesis filterbank.
  53    * \param numchans (unsigned integer) Specifies the number of
  54                      channels <EM>M</EM>
  55    * \param taps    (vector/list of floats) The prototype filter to
  56                     populate the filterbank.
  57    */
  58   friend gr_pfb_synthesis_filterbank_ccf_sptr gr_make_pfb_synthesis_filterbank_ccf
  59       (unsigned int numchans, const std::vector<float> &taps);
  60
  61   bool                     d_updated;
  62   unsigned int             d_numchans;
  63   unsigned int             d_taps_per_filter;
  64   gri_fft_complex         *d_fft;
  65   //gr_complex             **d_buffer;
  66   std::vector< gri_fir_filter_with_buffer_ccf*> d_filters;
  67   std::vector< std::vector<float> > d_taps;
  68
  69
  70   /*!
  71    * Build the polyphase synthesis filterbank.
  72    * \param numchans (unsigned integer) Specifies the number of
  73                      channels <EM>M</EM>
  74    * \param taps    (vector/list of floats) The prototype filter
  75                     to populate the filterbank.
  76    */
  77   gr_pfb_synthesis_filterbank_ccf (unsigned int numchans,
  78                                    const std::vector<float> &taps);
  79
  80 public:
  81   ~gr_pfb_synthesis_filterbank_ccf ();
  82
  83   /*!
  84    * Resets the filterbank's filter taps with the new prototype filter
  85    * \param taps    (vector/list of floats) The prototype filter to
  86                     populate the filterbank.
  87    */
  88   void set_taps (const std::vector<float> &taps);
  89
  90   /*!
  91    * Print all of the filterbank taps to screen.
  92    */
  93   void print_taps();
  94
  95   int work (int noutput_items,
  96             gr_vector_const_void_star &input_items,
  97             gr_vector_void_star &output_items);
  98 };
  99
 100 #endif