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 16 namespace webrtc { 17 18 class 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 55 inline bool operator==(const NtpTime& n1, const NtpTime& n2) { 56 return n1.seconds() == n2.seconds() && n1.fractions() == n2.fractions(); 57 } 58 inline 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
