87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
/*
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* Copyright 2022 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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#ifndef ANDROID_HWC_VSYNCTHREAD_H
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#define ANDROID_HWC_VSYNCTHREAD_H
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#include <aidl/android/hardware/graphics/composer3/VsyncPeriodChangeConstraints.h>
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#include <aidl/android/hardware/graphics/composer3/VsyncPeriodChangeTimeline.h>
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#include <android/hardware/graphics/common/1.0/types.h>
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#include <chrono>
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#include <mutex>
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#include <optional>
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#include <thread>
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#include "Common.h"
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namespace aidl::android::hardware::graphics::composer3::impl {
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// Generates Vsync signals in software.
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class VsyncThread {
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public:
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VsyncThread(int64_t id);
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virtual ~VsyncThread();
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VsyncThread(const VsyncThread&) = default;
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VsyncThread& operator=(const VsyncThread&) = default;
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VsyncThread(VsyncThread&&) = default;
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VsyncThread& operator=(VsyncThread&&) = default;
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HWC3::Error start(int32_t periodNanos);
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HWC3::Error setCallbacks(const std::shared_ptr<IComposerCallback>& callback);
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HWC3::Error setVsyncEnabled(bool enabled);
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HWC3::Error scheduleVsyncUpdate(
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int32_t newVsyncPeriod,
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const VsyncPeriodChangeConstraints& newVsyncPeriodChangeConstraints,
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VsyncPeriodChangeTimeline* timeline);
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private:
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HWC3::Error stop();
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void threadLoop();
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std::chrono::nanoseconds updateVsyncPeriodLocked(
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std::chrono::time_point<std::chrono::steady_clock> now);
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const int64_t mDisplayId;
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std::thread mThread;
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std::mutex mStateMutex;
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std::atomic<bool> mShuttingDown{false};
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std::shared_ptr<IComposerCallback> mCallbacks;
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bool mVsyncEnabled = false;
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std::chrono::nanoseconds mVsyncPeriod;
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std::chrono::time_point<std::chrono::steady_clock> mPreviousVsync;
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struct PendingUpdate {
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std::chrono::nanoseconds period;
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std::chrono::time_point<std::chrono::steady_clock> updateAfter;
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};
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std::optional<PendingUpdate> mPendingUpdate;
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};
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} // namespace aidl::android::hardware::graphics::composer3::impl
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#endif |