1 /* -*- c++ -*- */
2 /*
3 * Copyright 2007,2010,2013,2018 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
9 * the Free Software Foundation; either version 3, or (at your option)
10 * any later version.
11 *
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.
16 *
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.
21 */
22
23
24 #ifdef HAVE_CONFIG_H
25 #include "config.h"
26 #endif
27
28 #include "sample_and_hold_impl.h"
29 #include <gnuradio/io_signature.h>
30
31 namespace gr {
32 namespace blocks {
33
34 template <class T>
make()35 typename sample_and_hold<T>::sptr sample_and_hold<T>::make()
36 {
37 return gnuradio::get_initial_sptr(new sample_and_hold_impl<T>());
38 }
39
40 template <class T>
sample_and_hold_impl()41 sample_and_hold_impl<T>::sample_and_hold_impl()
42 : sync_block("sample_and_hold",
43 io_signature::make2(2, 2, sizeof(T), sizeof(char)),
44 io_signature::make(1, 1, sizeof(T))),
45 d_data(0)
46 {
47 }
48
49 template <class T>
~sample_and_hold_impl()50 sample_and_hold_impl<T>::~sample_and_hold_impl()
51 {
52 }
53
54 template <class T>
work(int noutput_items,gr_vector_const_void_star & input_items,gr_vector_void_star & output_items)55 int sample_and_hold_impl<T>::work(int noutput_items,
56 gr_vector_const_void_star& input_items,
57 gr_vector_void_star& output_items)
58 {
59 T* iptr = (T*)input_items[0];
60 const char* ctrl = (const char*)input_items[1];
61 T* optr = (T*)output_items[0];
62
63 for (int i = 0; i < noutput_items; i++) {
64 if (ctrl[i]) {
65 d_data = iptr[i];
66 }
67 optr[i] = d_data;
68 }
69 return noutput_items;
70 }
71
72 template class sample_and_hold<std::uint8_t>;
73 template class sample_and_hold<std::int16_t>;
74 template class sample_and_hold<std::int32_t>;
75 template class sample_and_hold<float>;
76 } /* namespace blocks */
77 } /* namespace gr */
78