1/*
2*  Copyright (c) 2015 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#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_
11#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_
12
13#include "webrtc/base/basictypes.h"
14#include "webrtc/system_wrappers/include/clock.h"
15
16namespace webrtc {
17
18class NtpTime {
19 public:
20  NtpTime() : seconds_(0), fractions_(0) {}
21  explicit NtpTime(const Clock& clock) {
22    clock.CurrentNtp(seconds_, fractions_);
23  }
24  NtpTime(uint32_t seconds, uint32_t fractions)
25      : seconds_(seconds), fractions_(fractions) {}
26
27  NtpTime(const NtpTime&) = default;
28  NtpTime& operator=(const NtpTime&) = default;
29
30  void SetCurrent(const Clock& clock) {
31    clock.CurrentNtp(seconds_, fractions_);
32  }
33  void Set(uint32_t seconds, uint32_t fractions) {
34    seconds_ = seconds;
35    fractions_ = fractions;
36  }
37  void Reset() {
38    seconds_ = 0;
39    fractions_ = 0;
40  }
41
42  int64_t ToMs() const { return Clock::NtpToMs(seconds_, fractions_); }
43
44  // NTP standard (RFC1305, section 3.1) explicitly state value 0/0 is invalid.
45  bool Valid() const { return !(seconds_ == 0 && fractions_ == 0); }
46
47  uint32_t seconds() const { return seconds_; }
48  uint32_t fractions() const { return fractions_; }
49
50 private:
51  uint32_t seconds_;
52  uint32_t fractions_;
53};
54
55inline bool operator==(const NtpTime& n1, const NtpTime& n2) {
56  return n1.seconds() == n2.seconds() && n1.fractions() == n2.fractions();
57}
58inline bool operator!=(const NtpTime& n1, const NtpTime& n2) {
59  return !(n1 == n2);
60}
61
62}  // namespace webrtc
63#endif  // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_
64