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aba1dd16 JH |
1 | /* |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <extdef.h> | |
22 | ||
23 | #include <assert.h> | |
24 | #include <string.h> | |
25 | #include <stdlib.h> | |
26 | #include <math.h> | |
27 | ||
28 | #include <boost/foreach.hpp> | |
29 | ||
1b1ec774 | 30 | #include "analogsnapshot.h" |
aba1dd16 JH |
31 | |
32 | using namespace boost; | |
33 | using namespace std; | |
34 | ||
35 | namespace pv { | |
1b1ec774 | 36 | namespace data { |
aba1dd16 | 37 | |
1b1ec774 JH |
38 | AnalogSnapshot::AnalogSnapshot(const sr_datafeed_analog &analog) : |
39 | Snapshot(sizeof(float)) | |
aba1dd16 JH |
40 | { |
41 | lock_guard<recursive_mutex> lock(_mutex); | |
42 | append_payload(analog); | |
43 | } | |
44 | ||
1b1ec774 | 45 | void AnalogSnapshot::append_payload( |
aba1dd16 JH |
46 | const sr_datafeed_analog &analog) |
47 | { | |
48 | lock_guard<recursive_mutex> lock(_mutex); | |
aba1dd16 JH |
49 | append_data(analog.data, analog.num_samples); |
50 | } | |
51 | ||
d3758367 JH |
52 | const float* AnalogSnapshot::get_samples( |
53 | int64_t start_sample, int64_t end_sample) const | |
a8acb46e | 54 | { |
d3758367 JH |
55 | assert(start_sample >= 0); |
56 | assert(start_sample < (int64_t)_sample_count); | |
57 | assert(end_sample >= 0); | |
58 | assert(end_sample < (int64_t)_sample_count); | |
59 | assert(start_sample <= end_sample); | |
60 | ||
61 | lock_guard<recursive_mutex> lock(_mutex); | |
62 | ||
63 | float *const data = new float[end_sample - start_sample]; | |
64 | memcpy(data, (float*)_data + start_sample, sizeof(float) * | |
65 | (end_sample - start_sample)); | |
66 | return data; | |
a8acb46e JH |
67 | } |
68 | ||
1b1ec774 | 69 | } // namespace data |
aba1dd16 | 70 | } // namespace pv |