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3e113438b1
One reason for the circular deps is that common_types.h is a historical dumping ground for various structs and defines that are believed to be generally useful. I tried moving things out that did not appear to be used downstream (StreamCounters, RtpCounters etc) and moved the things that seemed used (RtpHeader + supporting structs) to a new file api/rtp_headers.h. This makes their place in the api more clear while moving out the things that don't belong in the API in the first place. I had to extract out typedefs.h from webrtc_common to resolve another circular dependency. I believe checks includes typedefs, but common depends on checks. Bug: webrtc:7745 Change-Id: I725d49616b1ec0cdc8b74be7c078f7a4d46f084b Reviewed-on: https://webrtc-review.googlesource.com/33001 Commit-Queue: Patrik Höglund <phoglund@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21295}
64 lines
2 KiB
C++
64 lines
2 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 SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_
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#define SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_
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#include <stdint.h>
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#include "rtc_base/numerics/safe_conversions.h"
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namespace webrtc {
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class NtpTime {
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public:
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static constexpr uint64_t kFractionsPerSecond = 0x100000000;
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NtpTime() : value_(0) {}
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explicit NtpTime(uint64_t value) : value_(value) {}
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NtpTime(uint32_t seconds, uint32_t fractions)
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: value_(seconds * kFractionsPerSecond + fractions) {}
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NtpTime(const NtpTime&) = default;
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NtpTime& operator=(const NtpTime&) = default;
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explicit operator uint64_t() const { return value_; }
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void Set(uint32_t seconds, uint32_t fractions) {
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value_ = seconds * kFractionsPerSecond + fractions;
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}
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void Reset() { value_ = 0; }
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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 is invalid.
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bool Valid() const { return value_ != 0; }
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uint32_t seconds() const {
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return rtc::dchecked_cast<uint32_t>(value_ / kFractionsPerSecond);
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}
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uint32_t fractions() const {
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return rtc::dchecked_cast<uint32_t>(value_ % kFractionsPerSecond);
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}
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private:
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uint64_t value_;
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};
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inline bool operator==(const NtpTime& n1, const NtpTime& n2) {
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return static_cast<uint64_t>(n1) == static_cast<uint64_t>(n2);
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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 // SYSTEM_WRAPPERS_INCLUDE_NTP_TIME_H_
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