76 lines
1.8 KiB
C++
76 lines
1.8 KiB
C++
/*
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* Copyright (C) 2023 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 <chrono>
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#include <condition_variable>
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#include <functional>
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#include <thread>
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namespace android::drm_hwcomposer {
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// NOLINTNEXTLINE(misc-unused-using-decls): False positive
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using std::chrono_literals::operator""s;
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struct FlatConCallbacks {
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std::function<void()> trigger;
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};
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class FlatteningController {
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public:
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static auto CreateInstance(FlatConCallbacks &cbks)
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-> std::shared_ptr<FlatteningController>;
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~FlatteningController() {
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StopThread();
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thread_.join();
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}
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void Disable() {
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auto lock = std::lock_guard<std::mutex>(mutex_);
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flatten_next_frame_ = false;
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disabled_ = true;
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}
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/* Compositor should call this every frame */
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bool NewFrame();
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auto ShouldFlatten() const {
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return flatten_next_frame_;
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}
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void StopThread() {
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auto lock = std::lock_guard<std::mutex>(mutex_);
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cbks_ = {};
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cv_.notify_all();
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}
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static constexpr auto kTimeout = 1s;
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private:
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FlatteningController() = default;
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void ThreadFn();
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bool flatten_next_frame_{};
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bool disabled_{};
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decltype(std::chrono::system_clock::now()) sleep_until_{};
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std::thread thread_;
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std::mutex mutex_;
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std::condition_variable cv_;
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FlatConCallbacks cbks_;
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};
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} // namespace android::drm_hwcomposer
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