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86 lines
2.8 KiB
86 lines
2.8 KiB
/*
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* Copyright 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <cstddef>
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#include <utils/Mutex.h>
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#include <utils/RefBase.h>
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#include <utils/Timers.h>
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#include <ui/FenceTime.h>
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#include <memory>
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namespace android::scheduler {
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class FenceTime;
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class VsyncController {
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public:
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virtual ~VsyncController();
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/*
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* Adds a present fence to the model. The controller will use the fence time as
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* a vsync signal.
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*
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* \param [in] fence The present fence given from the display
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* \return True if the model needs more vsync signals to make
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* an accurate prediction,
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* False otherwise
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*/
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virtual bool addPresentFence(const std::shared_ptr<android::FenceTime>&) = 0;
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/*
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* Adds a hw sync timestamp to the model. The controller will use the timestamp
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* time as a vsync signal.
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*
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* \param [in] timestamp The HW Vsync timestamp
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* \param [in] hwcVsyncPeriod The Vsync period reported by composer, if available
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* \param [out] periodFlushed True if the vsync period changed is completed
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* \return True if the model needs more vsync signals to make
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* an accurate prediction,
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* False otherwise
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*/
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virtual bool addHwVsyncTimestamp(nsecs_t timestamp, std::optional<nsecs_t> hwcVsyncPeriod,
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bool* periodFlushed) = 0;
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/*
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* Inform the controller that the period is changing and the controller needs to recalibrate
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* itself. The controller will end the period transition internally.
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*
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* \param [in] period The period that the system is changing into.
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*/
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virtual void startPeriodTransition(nsecs_t period) = 0;
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/*
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* Tells the tracker to stop using present fences to get a vsync signal.
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*
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* \param [in] ignore Whether to ignore the present fences or not
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*/
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virtual void setIgnorePresentFences(bool ignore) = 0;
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virtual void dump(std::string& result) const = 0;
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protected:
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VsyncController() = default;
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VsyncController(VsyncController const&) = delete;
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VsyncController& operator=(VsyncController const&) = delete;
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};
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} // namespace android::scheduler
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