3795376ba1
BUG=None Review-Url: https://codereview.webrtc.org/2393723004 Cr-Commit-Position: refs/heads/master@{#16519}
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_
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#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_
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#include <stdint.h>
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namespace webrtc {
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class NtpTime {
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public:
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NtpTime() : seconds_(0), fractions_(0) {}
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NtpTime(uint32_t seconds, uint32_t fractions)
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: seconds_(seconds), fractions_(fractions) {}
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NtpTime(const NtpTime&) = default;
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NtpTime& operator=(const NtpTime&) = default;
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void Set(uint32_t seconds, uint32_t fractions) {
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seconds_ = seconds;
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fractions_ = fractions;
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}
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void Reset() {
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seconds_ = 0;
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fractions_ = 0;
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}
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int64_t ToMs() const {
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static constexpr double kNtpFracPerMs = 4.294967296E6; // 2^32 / 1000.
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const double frac_ms = static_cast<double>(fractions_) / kNtpFracPerMs;
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return 1000 * static_cast<int64_t>(seconds_) +
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static_cast<int64_t>(frac_ms + 0.5);
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}
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// NTP standard (RFC1305, section 3.1) explicitly state value 0/0 is invalid.
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bool Valid() const { return !(seconds_ == 0 && fractions_ == 0); }
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uint32_t seconds() const { return seconds_; }
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uint32_t fractions() const { return fractions_; }
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private:
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uint32_t seconds_;
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uint32_t fractions_;
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};
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inline bool operator==(const NtpTime& n1, const NtpTime& n2) {
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return n1.seconds() == n2.seconds() && n1.fractions() == n2.fractions();
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}
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inline bool operator!=(const NtpTime& n1, const NtpTime& n2) {
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return !(n1 == n2);
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}
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} // namespace webrtc
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#endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_
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