1/*
2 *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_BASE_RATETRACKER_H_
12#define WEBRTC_BASE_RATETRACKER_H_
13
14#include <stdlib.h>
15#include "webrtc/base/basictypes.h"
16
17namespace rtc {
18
19// Computes instantaneous units per second.
20class RateTracker {
21 public:
22  RateTracker();
23  virtual ~RateTracker() {}
24
25  size_t total_units() const;
26  size_t units_second();
27  void Update(size_t units);
28
29 protected:
30  // overrideable for tests
31  virtual uint32 Time() const;
32
33 private:
34  size_t total_units_;
35  size_t units_second_;
36  uint32 last_units_second_time_;
37  size_t last_units_second_calc_;
38};
39
40}  // namespace rtc
41
42#endif  // WEBRTC_BASE_RATETRACKER_H_
43