summaryrefslogtreecommitdiffstats
path: root/services/surfaceflinger/EventThread.h
blob: 1c6e63718f1e8cb5e49fd7bb1673d08604302f66 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
/*
 * Copyright (C) 2011 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.
 */

#ifndef ANDROID_SURFACE_FLINGER_EVENT_THREAD_H
#define ANDROID_SURFACE_FLINGER_EVENT_THREAD_H

#include <stdint.h>
#include <sys/types.h>

#include <gui/DisplayEventReceiver.h>
#include <gui/IDisplayEventConnection.h>

#include <utils/Errors.h>
#include <utils/threads.h>
#include <utils/SortedVector.h>

#include "DisplayHardware/PowerHAL.h"

// ---------------------------------------------------------------------------
namespace android {
// ---------------------------------------------------------------------------

class SurfaceFlinger;
class String8;

// ---------------------------------------------------------------------------

class EventThread : public Thread {
    class Connection : public BnDisplayEventConnection {
    public:
        Connection(const sp<EventThread>& eventThread);
        status_t postEvent(const DisplayEventReceiver::Event& event);

        // count >= 1 : continuous event. count is the vsync rate
        // count == 0 : one-shot event that has not fired
        // count ==-1 : one-shot event that fired this round / disabled
        int32_t count;

    private:
        virtual ~Connection();
        virtual void onFirstRef();
        virtual sp<BitTube> getDataChannel() const;
        virtual void setVsyncRate(uint32_t count);
        virtual void requestNextVsync();    // asynchronous
        sp<EventThread> const mEventThread;
        sp<BitTube> const mChannel;
    };

public:

    EventThread(const sp<SurfaceFlinger>& flinger);

    sp<Connection> createEventConnection() const;
    status_t registerDisplayEventConnection(const sp<Connection>& connection);

    void setVsyncRate(uint32_t count, const sp<Connection>& connection);
    void requestNextVsync(const sp<Connection>& connection);

    // called before the screen is turned off from main thread
    void onScreenReleased();

    // called after the screen is turned on from main thread
    void onScreenAcquired();

    // called when receiving a vsync event
    void onVSyncReceived(int type, nsecs_t timestamp);
    void onHotplugReceived(int type, bool connected);

    Vector< sp<EventThread::Connection> > waitForEvent(
            DisplayEventReceiver::Event* event);

    void dump(String8& result, char* buffer, size_t SIZE) const;

private:
    virtual bool        threadLoop();
    virtual void        onFirstRef();

    void removeDisplayEventConnection(const wp<Connection>& connection);
    void enableVSyncLocked();
    void disableVSyncLocked();

    // constants
    sp<SurfaceFlinger> mFlinger;
    PowerHAL mPowerHAL;

    mutable Mutex mLock;
    mutable Condition mCondition;

    // protected by mLock
    SortedVector< wp<Connection> > mDisplayEventConnections;
    Vector< DisplayEventReceiver::Event > mPendingEvents;
    nsecs_t mVSyncTimestamp;
    bool mUseSoftwareVSync;
    size_t mVSyncCount;

    // for debugging
    bool mDebugVsyncEnabled;
};

// ---------------------------------------------------------------------------

}; // namespace android

// ---------------------------------------------------------------------------

#endif /* ANDROID_SURFACE_FLINGER_EVENT_THREAD_H */