1/*
2// Copyright (c) 2014 Intel Corporation 
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#ifndef VSYNC_MANAGER_H
17#define VSYNC_MANAGER_H
18
19#include <IDisplayDevice.h>
20#include <utils/threads.h>
21
22namespace android {
23namespace intel {
24
25
26class Hwcomposer;
27
28class VsyncManager {
29public:
30    VsyncManager(Hwcomposer& hwc);
31    virtual ~VsyncManager();
32
33public:
34    bool initialize();
35    void deinitialize();
36    bool handleVsyncControl(int disp, bool enabled);
37    void resetVsyncSource();
38    int getVsyncSource();
39    void enableDynamicVsync(bool enable);
40
41private:
42    inline int getCandidate();
43    inline bool enableVsync(int candidate);
44    inline void disableVsync();
45    IDisplayDevice* getDisplayDevice(int dispType);
46
47private:
48    Hwcomposer &mHwc;
49    bool mInitialized;
50    bool mEnableDynamicVsync;
51    bool mEnabled;
52    int  mVsyncSource;
53    Mutex mLock;
54
55private:
56    // toggle this constant to use primary vsync only or enable dynamic vsync.
57    static const bool scUsePrimaryVsyncOnly = false;
58};
59
60} // namespace intel
61} // namespace android
62
63
64
65#endif /* VSYNC_MANAGER_H */
66