1 /*
2  * Copyright (c) 2023 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef OHOS_VSYNC_STATION_H
17 #define OHOS_VSYNC_STATION_H
18 
19 #include <atomic>
20 #include <functional>
21 #include <map>
22 #include <memory>
23 #include <unordered_set>
24 
25 #include <refbase.h>
26 #include <vsync_receiver.h>
27 
28 #include "wm_common.h"
29 #include "wm_single_instance.h"
30 #include <ui/rs_display_node.h>
31 
32 namespace OHOS {
33 namespace Rosen {
34 class VsyncStation {
35 public:
36     explicit VsyncStation(NodeId nodeId);
~VsyncStation()37     ~VsyncStation()
38     {
39         std::lock_guard<std::mutex> lock(mtx_);
40         destroyed_ = true;
41     }
42 
43     void RequestVsync(const std::shared_ptr<VsyncCallback>& vsyncCallback);
44     int64_t GetVSyncPeriod();
45     void RemoveCallback();
46 
47 private:
48     static void OnVsync(int64_t nanoTimestamp, int64_t frameCount, void* client);
49     void VsyncCallbackInner(int64_t nanoTimestamp, int64_t frameCount);
50     void OnVsyncTimeOut();
51     void Init();
52 
53     std::mutex mtx_;
54     NodeId nodeId_ = 0;
55     bool hasRequestedVsync_ = false;
56     bool hasInitVsyncReceiver_ = false;
57     bool destroyed_ = false;
58     const std::string VSYNC_THREAD_ID = "VsyncThread";
59     std::shared_ptr<OHOS::Rosen::VSyncReceiver> receiver_ = nullptr;
60     std::unordered_set<std::shared_ptr<VsyncCallback>> vsyncCallbacks_;
61     VSyncReceiver::FrameCallback frameCallback_ = {
62         .userData_ = this,
63         .callbackWithId_ = OnVsync,
64     };
65 };
66 } // namespace Rosen
67 } // namespace OHOS
68 #endif // OHOS_VSYNC_STATION_H