GNU Radio's DAB Package
dab_moving_sum_cc.h
Go to the documentation of this file.
1
/* -*- c++ -*- */
2
/*
3
* Copyright 2004 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
#ifndef INCLUDED_DAB_MOVING_SUM_CC_H
23
#define INCLUDED_DAB_MOVING_SUM_CC_H
24
25
#include <gr_sync_block.h>
26
27
class
dab_moving_sum_cc
;
28
29
typedef
boost::shared_ptr<dab_moving_sum_cc> dab_moving_sum_cc_sptr;
30
31
dab_moving_sum_cc_sptr
dab_make_moving_sum_cc
(
int
length
);
32
33
/*!
34
* \brief Moving sum over a stream of complex floats.
35
* \ingroup filter
36
* \param length length of the moving sum (=number of taps)
37
*
38
* input: complex
39
* output: complex
40
*
41
* This is the same as an FIR filter with length taps 1, but much faster
42
* (linear time instead of O(n*m)). On the other hand, since only the diff is
43
* calculated for each sample, there is some chance of an accumulating error.
44
*/
45
class
dab_moving_sum_cc
:
public
gr_sync_block
46
{
47
private
:
48
// The friend declaration allows dab_make_moving_sum_cc to
49
// access the private constructor.
50
51
friend
dab_moving_sum_cc_sptr
dab_make_moving_sum_cc
(
int
length
);
52
53
dab_moving_sum_cc
(
int
length
);
// private constructor
54
55
gr_complexd d_sum;
56
int
d_length;
57
58
public
:
59
~dab_moving_sum_cc
();
// public destructor
60
int
length
()
const
{
return
d_length;}
61
void
reset
() {d_sum=0;}
62
63
// Where all the action really happens
64
65
int
work
(
int
noutput_items,
66
gr_vector_const_void_star &input_items,
67
gr_vector_void_star &output_items);
68
};
69
70
#endif
/* INCLUDED_DAB_MOVING_SUM_CC_H */
dab_moving_sum_cc::work
int work(int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
dab_moving_sum_cc::~dab_moving_sum_cc
~dab_moving_sum_cc()
dab_moving_sum_cc
Moving sum over a stream of complex floats.
Definition:
dab_moving_sum_cc.h:45
dab_moving_sum_cc::reset
void reset()
Definition:
dab_moving_sum_cc.h:61
dab_make_moving_sum_cc
dab_moving_sum_cc_sptr dab_make_moving_sum_cc(int length)
dab_moving_sum_cc::dab_make_moving_sum_cc
friend dab_moving_sum_cc_sptr dab_make_moving_sum_cc(int length)
dab_moving_sum_cc::length
int length() const
Definition:
dab_moving_sum_cc.h:60
lib
dab_moving_sum_cc.h
Generated by
1.8.17