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delay.h
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/* -*- c++ -*- */
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/*
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* Copyright 2007,2012-2013 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_BLOCKS_DELAY_H
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#define INCLUDED_BLOCKS_DELAY_H
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#include <
gnuradio/blocks/api.h
>
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#include <
gnuradio/block.h
>
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namespace
gr {
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namespace
blocks {
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/*!
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* \brief delay the input by a certain number of samples
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* \ingroup misc_blk
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*
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* Positive delays insert zero items at the beginning of the stream.
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* Negative delays discard items from the stream.
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*
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* You cannot initialize this block with a negative delay,
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* however. That leads to a causality issue with the buffers when
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* they are initialized. If you need to negetively delay one path,
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* then put the positive delay on the other path instead.
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*/
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class
BLOCKS_API
delay
:
virtual
public
block
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{
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public
:
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// gr::blocks::delay::sptr
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typedef
boost::shared_ptr<delay>
sptr
;
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/*!
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* \brief Make a delay block.
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* \param itemsize size of the data items.
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* \param delay number of samples to delay stream (>= 0).
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*/
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static
sptr
make(
size_t
itemsize
,
int
delay
);
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virtual
int
dly()
const
= 0;
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/*!
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* \brief Reset the delay.
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* \param d change the delay value. This can be a positive or
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* negative value.
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*/
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virtual
void
set_dly(
int
d) = 0;
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};
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}
/* namespace blocks */
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}
/* namespace gr */
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#endif
/* INCLUDED_BLOCKS_DELAY_H */
gr-blocks
include
gnuradio
blocks
delay.h
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