1 files changed, 105 insertions, 0 deletions
diff --git a/libktorrent/torrent/speedestimater.cpp b/libktorrent/torrent/speedestimater.cpp
new file mode 100644
index 0000000..f12b5ac
--- /dev/null
+++ b/libktorrent/torrent/speedestimater.cpp
@@ -0,0 +1,105 @@
+/***************************************************************************
+ *   Copyright (C) 2005 by Joris Guisson                                   *
+ *   [email protected]                                               *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.             *
+ ***************************************************************************/
+#include <qpair.h>
+#include <qvaluelist.h>
+#include <util/log.h>
+#include <util/timer.h>
+#include "speedestimater.h"
+#include <util/functions.h>
+
+namespace bt
+{
+	class SpeedEstimater::SpeedEstimaterPriv
+	{
+		float rate;
+		QValueList<QPair<Uint32,TimeStamp> > dlrate;
+	public:
+		SpeedEstimaterPriv() : rate(0) {}
+		~SpeedEstimaterPriv() {}
+		
+		void data(Uint32 bytes)
+		{
+			dlrate.append(qMakePair(bytes,GetCurrentTime()));
+		}
+		
+		void update()
+		{
+			TimeStamp now = GetCurrentTime();
+			
+			Uint32 bytes = 0,oldest = now;
+			QValueList<QPair<Uint32,TimeStamp> >::iterator i = dlrate.begin();
+			while (i != dlrate.end())
+			{
+				QPair<Uint32,TimeStamp> & p = *i;
+				if (now - p.second > 3000)
+				{
+					i = dlrate.erase(i);
+				}
+				else
+				{
+					if (p.second < oldest)
+						oldest = p.second;
+					
+					bytes += p.first;
+					i++;
+				}
+			}
+			
+			Uint32 d = 3000;
+			
+			if (bytes == 0)
+			{
+				rate = 0;
+			}
+			else
+			{
+			//	Out() << "bytes = " << bytes << " d = " << d << endl;
+				rate = (float) bytes / (d * 0.001f);
+			}
+		}
+		
+		float getRate() const {return rate;}
+	};
+
+	SpeedEstimater::SpeedEstimater()
+	{
+		download_rate = 0;
+		down = new SpeedEstimaterPriv();
+	}
+
+
+	SpeedEstimater::~SpeedEstimater()
+	{
+		delete down;
+	}
+
+	
+	
+	void SpeedEstimater::onRead(Uint32 bytes)
+	{
+		down->data(bytes);
+	}
+	
+	void SpeedEstimater::update()
+	{
+		down->update();
+		download_rate = down->getRate();
+	}
+}