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/*
* Copyright (C) 2015 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 <condition_variable>
#include <functional>
#include <map>
#include <mutex>
#include <thread>
#include "DrmDevice.h"
namespace android {
struct VSyncWorkerCallbacks {
std::function<void(uint64_t /*timestamp*/)> out_event;
std::function<uint32_t()> get_vperiod_ns;
};
class VSyncWorker {
public:
~VSyncWorker() = default;
auto static CreateInstance(std::shared_ptr<DrmDisplayPipeline> &pipe,
VSyncWorkerCallbacks &callbacks)
-> std::shared_ptr<VSyncWorker>;
void VSyncControl(bool enabled);
void StopThread();
private:
VSyncWorker() = default;
void ThreadFn(const std::shared_ptr<VSyncWorker> &vsw);
int64_t GetPhasedVSync(int64_t frame_ns, int64_t current) const;
int SyntheticWaitVBlank(int64_t *timestamp);
VSyncWorkerCallbacks callbacks_;
SharedFd drm_fd_;
uint32_t high_crtc_ = 0;
bool enabled_ = false;
bool thread_exit_ = false;
int64_t last_timestamp_ = -1;
std::condition_variable cv_;
std::thread vswt_;
std::mutex mutex_;
};
} // namespace android
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