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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/libwebrtc/test/drifting_clock.cc | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libwebrtc/test/drifting_clock.cc')
-rw-r--r-- | third_party/libwebrtc/test/drifting_clock.cc | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/third_party/libwebrtc/test/drifting_clock.cc b/third_party/libwebrtc/test/drifting_clock.cc new file mode 100644 index 0000000000..47c8e56916 --- /dev/null +++ b/third_party/libwebrtc/test/drifting_clock.cc @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2016 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. + */ + +#include "test/drifting_clock.h" + +#include "rtc_base/checks.h" + +namespace webrtc { +namespace test { +constexpr float DriftingClock::kNoDrift; + +DriftingClock::DriftingClock(Clock* clock, float speed) + : clock_(clock), drift_(speed - 1.0f), start_time_(clock_->CurrentTime()) { + RTC_CHECK(clock); + RTC_CHECK_GT(speed, 0.0f); +} + +TimeDelta DriftingClock::Drift() const { + auto now = clock_->CurrentTime(); + RTC_DCHECK_GE(now, start_time_); + return (now - start_time_) * drift_; +} + +Timestamp DriftingClock::Drift(Timestamp timestamp) const { + return timestamp + Drift() / 1000.; +} + +NtpTime DriftingClock::Drift(NtpTime ntp_time) const { + // NTP precision is 1/2^32 seconds, i.e. 2^32 ntp fractions = 1 second. + const double kNtpFracPerMicroSecond = 4294.967296; // = 2^32 / 10^6 + + uint64_t total_fractions = static_cast<uint64_t>(ntp_time); + total_fractions += Drift().us() * kNtpFracPerMicroSecond; + return NtpTime(total_fractions); +} + +} // namespace test +} // namespace webrtc |