3 * Copyright 2005 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_SKIPHEAD_H
24 #define INCLUDED_GR_SKIPHEAD_H
26 #include <gr_sync_block.h>
27 #include <stddef.h> // size_t
30 typedef boost::shared_ptr<gr_skiphead> gr_skiphead_sptr;
34 * \brief skips the first N items, from then on copies items to the output
35 * \ingroup slicedice_blk
37 * Useful for building test cases and sources which have metadata or junk at the start
40 class gr_skiphead : public gr_block
42 friend gr_skiphead_sptr gr_make_skiphead (size_t itemsize, size_t nitems_to_skip);
43 gr_skiphead (size_t itemsize, size_t nitems_to_skip);
45 long long d_nitems_to_skip;
46 long long d_nitems; // total items seen
50 int general_work(int noutput_items,
51 gr_vector_int &ninput_items,
52 gr_vector_const_void_star &input_items,
53 gr_vector_void_star &output_items);
57 gr_make_skiphead (size_t itemsize, size_t nitems_to_skip);
60 #endif /* INCLUDED_GR_SKIPHEAD_H */