mirror of
https://github.com/gnif/LookingGlass.git
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101 lines
2.8 KiB
C++
101 lines
2.8 KiB
C++
/**
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* Looking Glass
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* Copyright © 2017-2026 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#pragma once
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#include <Windows.h>
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#include <stdint.h>
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extern "C" {
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#include <lgmp/lgmp.h>
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}
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#include "common/KVMFR.h"
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class CFrameScheduler
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{
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public:
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struct Schedule
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{
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uint32_t clientID;
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uint32_t generation;
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uint64_t period;
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uint64_t targetSlack;
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};
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private:
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struct Client
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{
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uint32_t clientID;
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uint32_t generation;
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uint64_t period;
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uint64_t targetSlack;
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uint64_t expiry;
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uint32_t lastFeedbackFrameSerial;
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bool subscribed;
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bool active;
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};
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mutable SRWLOCK m_lock = SRWLOCK_INIT;
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Client m_clients[LGMP_MAX_CLIENTS] = {};
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Schedule m_schedule = {};
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bool m_scheduling = false;
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bool m_forceNext = false;
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uint64_t m_lastArrival = 0;
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uint64_t m_guestPeriod = 0;
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uint64_t m_guestJitter = 0;
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uint64_t m_workEstimate = 0;
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uint64_t m_nextDeadline = 0;
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unsigned m_arrivalSamples = 0;
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unsigned m_timingSamples = 0;
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uint32_t m_lastPublishedFrameSerial = 0;
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int64_t m_lastPhaseError = 0;
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uint64_t m_acquiredFrames = 0;
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uint64_t m_skippedFrames = 0;
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uint64_t m_publishedFrames = 0;
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uint64_t m_lastLog = 0;
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uint64_t m_lastLogAcquired = 0;
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uint64_t m_lastLogSkipped = 0;
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uint64_t m_lastLogPublished = 0;
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Client * FindClient(uint32_t clientID);
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void ElectOwner(uint64_t now);
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void ApplyFeedback(Client& client, const KVMFRFrameSchedule& schedule);
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void AdvanceDeadline(uint64_t now);
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public:
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static uint64_t Nanotime();
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void Reset();
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void UpdateSubscribers(const uint32_t * clientIDs, unsigned count,
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uint64_t now);
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bool UpdateSchedule(const KVMFRFrameSchedule& schedule, uint64_t now);
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bool GetSchedule(Schedule& schedule) const;
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void ObserveFrame(uint64_t now);
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bool SelectFrame(uint64_t now, bool force, uint32_t& generation);
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void FramePublished(uint32_t generation, uint32_t frameSerial,
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uint64_t now);
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void RecordFrameTiming(uint64_t duration);
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void LogStatistics(uint64_t now);
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};
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