d387c84940
VSyncWorker::SetVsyncPeriod won't be called with a value of 0, so the only time the internal vsync period will be zero is if SetVsyncPeriod was not called. Set the 60Hz vsync period as a default value, and let the synthetic vsync code expect it to be set to a reasonable value. Change-Id: Ie1f83b0c11504acf304cc241923bfa60a5ffd647 Signed-off-by: Drew Davenport <ddavenport@google.com>
74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
/*
|
|
* 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;
|
|
};
|
|
|
|
class VSyncWorker {
|
|
public:
|
|
~VSyncWorker() = default;
|
|
|
|
auto static CreateInstance(std::shared_ptr<DrmDisplayPipeline> &pipe,
|
|
VSyncWorkerCallbacks &callbacks)
|
|
-> std::shared_ptr<VSyncWorker>;
|
|
|
|
void VSyncControl(bool enabled);
|
|
|
|
// Set the expected vsync period.
|
|
void SetVsyncPeriodNs(uint32_t vsync_period_ns);
|
|
|
|
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;
|
|
|
|
// Default to 60Hz refresh rate
|
|
static constexpr uint32_t kDefaultVSPeriodNs = 16666666;
|
|
// Needs to be threadsafe.
|
|
uint32_t vsync_period_ns_ = kDefaultVSPeriodNs;
|
|
|
|
std::condition_variable cv_;
|
|
std::thread vswt_;
|
|
std::mutex mutex_;
|
|
};
|
|
} // namespace android
|