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106 lines
2.8 KiB
106 lines
2.8 KiB
/***************************************************************************
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* Copyright (C) 2005 by Joris Guisson *
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* joris.guisson@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include <tqpair.h>
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#include <tqvaluelist.h>
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#include <util/log.h>
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#include <util/timer.h>
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#include "speedestimater.h"
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#include <util/functions.h>
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namespace bt
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{
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class SpeedEstimater::SpeedEstimaterPriv
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{
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float rate;
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TQValueList<TQPair<Uint32,TimeStamp> > dlrate;
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public:
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SpeedEstimaterPriv() : rate(0) {}
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~SpeedEstimaterPriv() {}
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void data(Uint32 bytes)
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{
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dlrate.append(qMakePair(bytes,GetCurrentTime()));
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}
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void update()
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{
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TimeStamp now = GetCurrentTime();
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Uint32 bytes = 0,oldest = now;
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TQValueList<TQPair<Uint32,TimeStamp> >::iterator i = dlrate.begin();
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while (i != dlrate.end())
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{
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TQPair<Uint32,TimeStamp> & p = *i;
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if (now - p.second > 3000)
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{
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i = dlrate.erase(i);
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}
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else
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{
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if (p.second < oldest)
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oldest = p.second;
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bytes += p.first;
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i++;
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}
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}
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Uint32 d = 3000;
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if (bytes == 0)
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{
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rate = 0;
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}
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else
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{
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// Out() << "bytes = " << bytes << " d = " << d << endl;
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rate = (float) bytes / (d * 0.001f);
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}
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}
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float getRate() const {return rate;}
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};
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SpeedEstimater::SpeedEstimater()
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{
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download_rate = 0;
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down = new SpeedEstimaterPriv();
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}
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SpeedEstimater::~SpeedEstimater()
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{
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delete down;
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}
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void SpeedEstimater::onRead(Uint32 bytes)
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{
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down->data(bytes);
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}
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void SpeedEstimater::update()
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{
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down->update();
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download_rate = down->getRate();
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}
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}
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