3 * Copyright 2004 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
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)
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.
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.
23 #ifndef INCLUDED_GR_FILTER_DELAY_FC_H
24 #define INCLUDED_GR_FILTER_DELAY_FC_H
26 #include <gr_sync_block.h>
27 #include <gr_io_signature.h>
30 class gr_filter_delay_fc;
31 typedef boost::shared_ptr<gr_filter_delay_fc> gr_filter_delay_fc_sptr;
34 gr_filter_delay_fc_sptr gr_make_filter_delay_fc (const std::vector<float> &taps);
39 * \brief Filter-Delay Combination Block.
42 * The block takes one or two float stream and outputs a complex
43 * stream. If only one float stream is input, the real output is
44 * a delayed version of this input and the imaginary output is the
45 * filtered output. If two floats are connected to the input, then
46 * the real output is the delayed version of the first input, and
47 * the imaginary output is the filtered output. The delay in the
48 * real path accounts for the group delay introduced by the filter
49 * in the imaginary path. The filter taps needs to be calculated
50 * before initializing this block.
53 class gr_filter_delay_fc : public gr_sync_block
56 ~gr_filter_delay_fc ();
58 int work (int noutput_items,
59 gr_vector_const_void_star &input_items,
60 gr_vector_void_star &output_items);
63 gr_filter_delay_fc (const std::vector<float> &taps);
69 friend gr_filter_delay_fc_sptr gr_make_filter_delay_fc (const std::vector<float> &taps);
72 #endif /* INCLUDED_GR_FILTER_DELAY_FC_H */