SpeedCalc.h 2.22 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 Tatsuhiro Tsujikawa
 *
 * 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
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#ifndef D_SPEED_CALC_H
#define D_SPEED_CALC_H

#include "common.h"
39 40 41

#include <deque>

42 43 44 45 46 47
#include "TimerA2.h"

namespace aria2 {

class SpeedCalc {
private:
48
  std::deque<std::pair<Timer, size_t>> timeSlots_;
49 50
  Timer start_;
  int64_t accumulatedLength_;
51 52
  int64_t bytesWindow_;
  int maxSpeed_;
53

54 55
  void removeStaleTimeSlot(const Timer& now);

56 57 58 59 60 61 62 63
public:
  SpeedCalc();

  /**
   * Returns download/upload speed in byte per sec
   */
  int calculateSpeed();

64 65
  int calculateNewestSpeed(int seconds);

66
  int getMaxSpeed() const { return maxSpeed_; }
67 68 69 70 71 72 73 74 75 76 77

  int calculateAvgSpeed() const;

  void update(size_t bytes);

  void reset();
};

} // namespace aria2

#endif // D_SPEED_CALC_H