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/* -*- c++ -*- */
/*
* Copyright 2007,2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_GR_DELAY_H
#define INCLUDED_GR_DELAY_H
#include <gr_core_api.h>
#include <gr_block.h>
#include <gruel/thread.h>
class gr_delay;
typedef boost::shared_ptr<gr_delay> gr_delay_sptr;
GR_CORE_API gr_delay_sptr gr_make_delay (size_t itemsize, int delay);
/*!
* \brief delay the input by a certain number of samples
* \ingroup misc_blk
*/
class GR_CORE_API gr_delay : public gr_block
{
friend GR_CORE_API gr_delay_sptr gr_make_delay (size_t itemsize, int delay);
gr_delay (size_t itemsize, int delay);
void forecast (int noutput_items, gr_vector_int &ninput_items_required);
size_t d_itemsize;
int d_delta;
gruel::mutex d_mutex_delay;
public:
int delay () const { return history()-1; }
void set_delay (int delay);
int general_work (int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif
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