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64 lines
2 KiB
C++
64 lines
2 KiB
C++
/***
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This file is part of snapcast
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Copyright (C) 2014-2020 Johannes Pohl
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "time_provider.hpp"
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#include "common/aixlog.hpp"
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TimeProvider::TimeProvider() : diffToServer_(0)
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{
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diffBuffer_.setSize(200);
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}
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void TimeProvider::setDiff(const tv& c2s, const tv& s2c)
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{
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// tv latency = c2s - s2c;
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// double diff = (latency.sec * 1000. + latency.usec / 1000.) / 2.;
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double diff = ((double)c2s.sec / 2. - (double)s2c.sec / 2.) * 1000. + ((double)c2s.usec / 2. - (double)s2c.usec / 2.) / 1000.;
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setDiffToServer(diff);
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}
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void TimeProvider::setDiffToServer(double ms)
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{
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static int32_t lastTimeSync = 0;
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timeval now;
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chronos::steadytimeofday(&now);
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/// clear diffBuffer if last update is older than a minute
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if (!diffBuffer_.empty() && (std::abs(now.tv_sec - lastTimeSync) > 60))
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{
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LOG(INFO) << "Last time sync older than a minute. Clearing time buffer\n";
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diffToServer_ = static_cast<chronos::usec::rep>(ms * 1000);
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diffBuffer_.clear();
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}
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lastTimeSync = now.tv_sec;
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diffBuffer_.add(ms * 1000);
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diffToServer_ = diffBuffer_.median();
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// LOG(INFO) << "setDiffToServer: " << ms << ", diff: " << diffToServer_ / 1000000 << " s, " << (diffToServer_ / 1000) % 1000 << "." << diffToServer_ % 1000
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// << " ms\n";
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}
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/*
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long TimeProvider::getPercentileDiffToServer(size_t percentile)
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{
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return diffBuffer.percentile(percentile);
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}
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*/
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