Improved ETA calculation

src/qtlibtorrent/torrentspeedmonitor.h

@@ -0,0 +1,59 @@
+#ifndef TORRENTSPEEDMONITOR_H
+#define TORRENTSPEEDMONITOR_H
+
+#include <QThread>
+#include <QWaitCondition>
+#include <QList>
+#include <QHash>
+#include <QMutex>
+#include "qtorrenthandle.h"
+
+class QBtSession;
+
+class SpeedSample {
+public:
+  SpeedSample(){}
+  void addSample(int s);
+  float average() const;
+  void clear();
+
+private:
+  static const int max_samples = 30;
+
+private:
+  QList<int> m_speedSamples;
+};
+
+class TorrentSpeedMonitor : public QThread
+{
+    Q_OBJECT
+
+public:
+    explicit TorrentSpeedMonitor(QBtSession* session);
+    ~TorrentSpeedMonitor();
+    qlonglong getETA(const QString &hash) const;
+
+protected:
+  void run();
+
+signals:
+
+private:
+  void getSamples();
+
+private slots:
+  void removeSamples(const QString& hash);
+  void removeSamples(const QTorrentHandle& h);
+
+private:
+  static const int sampling_interval = 1000; // 1s
+
+private:
+  bool m_abort;
+  QWaitCondition m_abortCond;
+  QHash<QString, SpeedSample> m_samples;
+  mutable QMutex mutex;
+  QBtSession *m_session;
+};
+
+#endif // TORRENTSPEEDMONITOR_H