GNU Radio 3.6.5.1 C++ API
gr_delay.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2007,2012 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
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22 
23 #ifndef INCLUDED_GR_DELAY_H
24 #define INCLUDED_GR_DELAY_H
25 
26 #include <gr_core_api.h>
27 #include <gr_block.h>
28 #include <gruel/thread.h>
29 
30 class gr_delay;
32 
34 
35 /*!
36  * \brief delay the input by a certain number of samples
37  */
39 {
40  friend GR_CORE_API gr_delay_sptr gr_make_delay (size_t itemsize, int delay);
41 
42  gr_delay (size_t itemsize, int delay);
43 
44  void forecast (int noutput_items, gr_vector_int &ninput_items_required);
45 
46  size_t d_itemsize;
47  int d_delta;
48  gruel::mutex d_mutex_delay;
49 
50  public:
51  int delay () const { return history()-1; }
52  void set_delay (int delay);
53 
54  int general_work (int noutput_items,
55  gr_vector_int &ninput_items,
56  gr_vector_const_void_star &input_items,
57  gr_vector_void_star &output_items);
58 };
59 
60 #endif