mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-14 14:20:45 +01:00
89c79383e4
Flakiness of the test reveals this assumption doesn't hold and shouldn't be rely on. Currently there is no code that use it. Plans to rely on it silently adjusted. Bug: webrtc:8610 Change-Id: Id24f2a36c8fb188b518f5301c4b278836885d140 Reviewed-on: https://webrtc-review.googlesource.com/56860 Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22160}
55 lines
2.1 KiB
C++
55 lines
2.1 KiB
C++
/*
|
|
* 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 MODULES_RTP_RTCP_SOURCE_TIME_UTIL_H_
|
|
#define MODULES_RTP_RTCP_SOURCE_TIME_UTIL_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "system_wrappers/include/ntp_time.h"
|
|
|
|
namespace webrtc {
|
|
|
|
// Converts time obtained using rtc::TimeMicros to ntp format.
|
|
// TimeMicrosToNtp guarantees difference of the returned values matches
|
|
// difference of the passed values.
|
|
// As a result TimeMicrosToNtp(rtc::TimeMicros()) doesn't guarantee to match
|
|
// system time.
|
|
NtpTime TimeMicrosToNtp(int64_t time_us);
|
|
|
|
// Converts NTP timestamp to RTP timestamp.
|
|
inline uint32_t NtpToRtp(NtpTime ntp, uint32_t freq) {
|
|
uint32_t tmp = (static_cast<uint64_t>(ntp.fractions()) * freq) >> 32;
|
|
return ntp.seconds() * freq + tmp;
|
|
}
|
|
|
|
// Helper function for compact ntp representation:
|
|
// RFC 3550, Section 4. Time Format.
|
|
// Wallclock time is represented using the timestamp format of
|
|
// the Network Time Protocol (NTP).
|
|
// ...
|
|
// In some fields where a more compact representation is
|
|
// appropriate, only the middle 32 bits are used; that is, the low 16
|
|
// bits of the integer part and the high 16 bits of the fractional part.
|
|
inline uint32_t CompactNtp(NtpTime ntp) {
|
|
return (ntp.seconds() << 16) | (ntp.fractions() >> 16);
|
|
}
|
|
|
|
// Converts interval in microseconds to compact ntp (1/2^16 seconds) resolution.
|
|
// Negative values converted to 0, Overlarge values converted to max uint32_t.
|
|
uint32_t SaturatedUsToCompactNtp(int64_t us);
|
|
|
|
// Converts interval between compact ntp timestamps to milliseconds.
|
|
// This interval can be up to ~9.1 hours (2^15 seconds).
|
|
// Values close to 2^16 seconds consider negative and result in minimum rtt = 1.
|
|
int64_t CompactNtpRttToMs(uint32_t compact_ntp_interval);
|
|
|
|
} // namespace webrtc
|
|
#endif // MODULES_RTP_RTCP_SOURCE_TIME_UTIL_H_
|