1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ANDROID_EVENT_WORKER_H_
18 #define ANDROID_EVENT_WORKER_H_
19 
20 #include "drmresources.h"
21 #include "worker.h"
22 
23 #include <map>
24 #include <stdint.h>
25 
26 #include <hardware/hardware.h>
27 #include <hardware/hwcomposer.h>
28 
29 namespace android {
30 
31 class VSyncWorker : public Worker {
32  public:
33   VSyncWorker();
34   ~VSyncWorker() override;
35 
36   int Init(DrmResources *drm, int display);
37   int SetProcs(hwc_procs_t const *procs);
38 
39   int VSyncControl(bool enabled);
40 
41  protected:
42   void Routine() override;
43 
44  private:
45   int64_t GetPhasedVSync(int64_t frame_ns, int64_t current);
46   int SyntheticWaitVBlank(int64_t *timestamp);
47 
48   DrmResources *drm_;
49   hwc_procs_t const *procs_;
50 
51   int display_;
52   bool enabled_;
53   int64_t last_timestamp_;
54 };
55 }
56 
57 #endif
58