src/base/bittorrent/speedmonitor.cpp

   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 #include "speedmonitor.h"
  31
  32 SpeedMonitor::SpeedMonitor()
  33     : m_speedSamples(MAX_SAMPLES)
  34 {
  35 }
  36
  37 void SpeedMonitor::addSample(const SpeedSample &sample)
  38 {
  39     if (m_speedSamples.size() >= MAX_SAMPLES)
  40     {
  41         m_sum -= m_speedSamples.front();
  42     }
  43
  44     m_speedSamples.push_back(sample);
  45     m_sum += sample;
  46 }
  47
  48 SpeedSampleAvg SpeedMonitor::average() const
  49 {
  50     if (m_speedSamples.empty())
  51         return {};
  52
  53     const qreal k = qreal(1.) / m_speedSamples.size();
  54     return {m_sum.download * k, m_sum.upload * k};
  55 }
  56
  57 void SpeedMonitor::reset()
  58 {
  59     m_sum = SpeedSample();
  60     m_speedSamples.clear();
  61 }