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Use moving median filters in RemoteNtpTimeEstimator, RtpToNtpEstimator

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If Webrtc-ClockEstimation experiment is enabled, median filtering is
applied to results of RtpToNtpEstimator and RemoteNtpEstimator to smooth
out random errors introduced by incorrect RTCP SR reports and networking
delays.

Bug: webrtc:8468
Change-Id: Iec6d094d2809d1efeb0b9483059167d9a03880da
Reviewed-on: https://webrtc-review.googlesource.com/22682
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Åsa Persson <asapersson@webrtc.org>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20682}
This commit is contained in:
Ilya Nikolaevskiy
2017-11-15 11:18:11 +01:00
committed by Commit Bot
parent 12e555b715
commit 550b666e20
7 changed files with 179 additions and 31 deletions
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3
modules/rtp_rtcp/include/remote_ntp_time_estimator.h
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@ -14,6 +14,7 @@
#include <memory>
#include "rtc_base/constructormagic.h"
#include "rtc_base/numerics/moving_median_filter.h"
#include "system_wrappers/include/rtp_to_ntp_estimator.h"
namespace webrtc {
@ -43,8 +44,10 @@ class RemoteNtpTimeEstimator {
private:
Clock* clock_;
std::unique_ptr<TimestampExtrapolator> ts_extrapolator_;
MovingMedianFilter<int64_t> ntp_clocks_offset_estimator_;
RtpToNtpEstimator rtp_to_ntp_;
int64_t last_timing_log_ms_;
const bool is_experiment_enabled_;
RTC_DISALLOW_COPY_AND_ASSIGN(RemoteNtpTimeEstimator);
};