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