3 * Copyright 2004,2010 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.
27 #include <gr_null_source.h>
28 #include <gr_io_signature.h>
31 gr_null_source::gr_null_source (size_t sizeof_stream_item)
32 : gr_sync_block ("null_source",
33 gr_make_io_signature (0, 0, 0),
34 gr_make_io_signature (1, 1, sizeof_stream_item))
39 gr_make_null_source (size_t sizeof_stream_item)
41 return gnuradio::get_initial_sptr (new gr_null_source (sizeof_stream_item));
45 gr_null_source::work (int noutput_items,
46 gr_vector_const_void_star &input_items,
47 gr_vector_void_star &output_items)
49 void *optr = (void *) output_items[0];
50 memset (optr, 0, noutput_items * output_signature()->sizeof_stream_item (0));