chromium/third_party/webrtc/system_wrappers/include/ntp_time.h

/*
 *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */
#ifndef SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_
#define SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_

#include <cmath>
#include <cstdint>
#include <limits>

#include "rtc_base/numerics/safe_conversions.h"

namespace webrtc {

class NtpTime { … };

inline bool operator==(const NtpTime& n1, const NtpTime& n2) { … }
inline bool operator!=(const NtpTime& n1, const NtpTime& n2) { … }

// Converts `int64_t` milliseconds to Q32.32-formatted fixed-point seconds.
// Performs clamping if the result overflows or underflows.
inline int64_t Int64MsToQ32x32(int64_t milliseconds) { … }

// Converts `int64_t` milliseconds to UQ32.32-formatted fixed-point seconds.
// Performs clamping if the result overflows or underflows.
inline uint64_t Int64MsToUQ32x32(int64_t milliseconds) { … }

// Converts Q32.32-formatted fixed-point seconds to `int64_t` milliseconds.
inline int64_t Q32x32ToInt64Ms(int64_t q32x32) { … }

// Converts UQ32.32-formatted fixed-point seconds to `int64_t` milliseconds.
inline int64_t UQ32x32ToInt64Ms(uint64_t q32x32) { … }

}  // namespace webrtc
#endif  // SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_