GNU Radio 2.x: gr_fft_filter_ccc.h Source File

Main Page | Modules | Namespace List | Class Hierarchy | Class List | File List | Class Members | File Members

# gr_fft_filter_ccc.h

Go to the documentation of this file.

    00001 /* -*- c++ -*- */
    00002 /*
    00003  * Copyright 2005 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 2, 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., 59 Temple Place - Suite 330,
    00020  * Boston, MA 02111-1307, USA.
    00021  */
    00022 #ifndef INCLUDED_GR_FFT_FILTER_CCC_H
    00023 #define INCLUDED_GR_FFT_FILTER_CCC_H
    00024
    00025 #include <gr_sync_decimator.h>
    00026
    00027 class gr_fft_filter_ccc;
    00028 typedef boost::shared_ptr<gr_fft_filter_ccc> gr_fft_filter_ccc_sptr;
    00029 gr_fft_filter_ccc_sptr gr_make_fft_filter_ccc (int decimation, const std::vector<gr_complex> &taps);
    00030
    00031 class gr_fir_ccc;
    00032 class gri_fft_complex;
    00033
    00038 class gr_fft_filter_ccc : public gr_sync_decimator
    00039 {
    00040  private:
    00041   friend gr_fft_filter_ccc_sptr gr_make_fft_filter_ccc (int decimation, const std::vector<gr_complex> &taps);
    00042
    00043   int                      d_ntaps;
    00044   int                      d_nsamples;
    00045   int                      d_fftsize;           // fftsize = ntaps + nsamples - 1
    00046   gri_fft_complex         *d_fwdfft;            // forward "plan"
    00047   gri_fft_complex         *d_invfft;            // inverse "plan"
    00048   std::vector<gr_complex>  d_tail;              // state carried between blocks for overlap-add
    00049   std::vector<gr_complex>  d_xformed_taps;      // Fourier xformed taps
    00050
    00057   gr_fft_filter_ccc (int decimation, const std::vector<gr_complex> &taps);
    00058
    00059   void compute_sizes(int ntaps);
    00060   int tailsize() const { return d_ntaps - 1; }
    00061
    00062  public:
    00063   ~gr_fft_filter_ccc ();
    00064
    00065   void set_taps (const std::vector<gr_complex> &taps);
    00066
    00067   int work (int noutput_items,
    00068             gr_vector_const_void_star &input_items,
    00069             gr_vector_void_star &output_items);
    00070 };
    00071
    00072
    00073
    00074 #endif /* INCLUDED_GR_FFT_FILTER_CCC_H */