1 /*
2  * Bittorrent Client using Qt and libtorrent.
3  * Copyright (C) 2015  Vladimir Golovnev <glassez@yandex.ru>
4  * Copyright (C) 2011  Christophe Dumez <chris@qbittorrent.org>
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version 2
9  * of the License, or (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 Street, Fifth Floor, Boston, MA  02110-1301, USA.
19  *
20  * In addition, as a special exception, the copyright holders give permission to
21  * link this program with the OpenSSL project's "OpenSSL" library (or with
22  * modified versions of it that use the same license as the "OpenSSL" library),
23  * and distribute the linked executables. You must obey the GNU General Public
24  * License in all respects for all of the code used other than "OpenSSL".  If you
25  * modify file(s), you may extend this exception to your version of the file(s),
26  * but you are not obligated to do so. If you do not wish to do so, delete this
27  * exception statement from your version.
28  */
29 
30 #pragma once
31 
32 #ifndef Q_MOC_RUN
33 #include <boost/circular_buffer.hpp>
34 #endif
35 
36 #include <QtGlobal>
37 
38 template<typename T>
39 struct Sample
40 {
SampleSample41     Sample()
42         : download()
43         , upload()
44     {
45     }
46 
SampleSample47     Sample(T dl, T ul)
48         : download(dl)
49         , upload(ul)
50     {
51     }
52 
53     Sample<T> &operator+=(const Sample<T> &other)
54     {
55         download += other.download;
56         upload   += other.upload;
57         return *this;
58     }
59 
60     Sample<T> &operator-=(const Sample<T> &other)
61     {
62         download -= other.download;
63         upload   -= other.upload;
64         return *this;
65     }
66 
67     T download;
68     T upload;
69 };
70 
71 typedef Sample<qlonglong> SpeedSample;
72 typedef Sample<qreal> SpeedSampleAvg;
73 
74 class SpeedMonitor
75 {
76 public:
77     SpeedMonitor();
78 
79     void addSample(const SpeedSample &sample);
80     SpeedSampleAvg average() const;
81     void reset();
82 
83 private:
84     static const int MAX_SAMPLES = 30;
85     boost::circular_buffer<SpeedSample> m_speedSamples;
86     SpeedSample m_sum;
87 };
88