summaryrefslogtreecommitdiffstats
path: root/services/camera/libcameraservice/CameraService.h
blob: 7844047ac079496ed5da2cb25075116e38fea4c1 (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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
/*
**
** Copyright (C) 2008, 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_SERVERS_CAMERA_CAMERASERVICE_H
#define ANDROID_SERVERS_CAMERA_CAMERASERVICE_H

#include <binder/BinderService.h>
#include <camera/ICameraService.h>
#include <hardware/camera.h>

/* This needs to be increased if we can have more cameras */
#ifdef OMAP_ENHANCEMENT
#define MAX_CAMERAS 3
#else
#define MAX_CAMERAS 2
#endif

namespace android {

extern volatile int32_t gLogLevel;

class MemoryHeapBase;
class MediaPlayer;

class CameraService :
    public BinderService<CameraService>,
    public BnCameraService,
    public IBinder::DeathRecipient
{
    friend class BinderService<CameraService>;
public:
    class Client;
    static char const* getServiceName() { return "media.camera"; }

                        CameraService();
    virtual             ~CameraService();

    virtual int32_t     getNumberOfCameras();
    virtual status_t    getCameraInfo(int cameraId,
                                      struct CameraInfo* cameraInfo);
    virtual sp<ICamera> connect(const sp<ICameraClient>& cameraClient, int cameraId);
    virtual void        removeClient(const sp<ICameraClient>& cameraClient);
    // returns plain pointer of client. Note that mClientLock should be acquired to
    // prevent the client from destruction. The result can be NULL.
    virtual Client*     getClientByIdUnsafe(int cameraId);
    virtual Mutex*      getClientLockById(int cameraId);

    virtual sp<Client>  getClientByRemote(const wp<IBinder>& cameraClient);

    virtual status_t    dump(int fd, const Vector<String16>& args);
    virtual status_t    onTransact(uint32_t code, const Parcel& data,
                                   Parcel* reply, uint32_t flags);
    virtual void onFirstRef();

    enum sound_kind {
        SOUND_SHUTTER = 0,
        SOUND_RECORDING = 1,
        NUM_SOUNDS
    };

    void                loadSound();
    void                playSound(sound_kind kind);
    void                releaseSound();

    class Client : public BnCamera
    {
    public:
        // ICamera interface (see ICamera for details)
        virtual void          disconnect();
        virtual status_t      connect(const sp<ICameraClient>& client) = 0;
        virtual status_t      lock() = 0;
        virtual status_t      unlock() = 0;
        virtual status_t      setPreviewDisplay(const sp<Surface>& surface) = 0;
        virtual status_t      setPreviewTexture(const sp<ISurfaceTexture>& surfaceTexture) = 0;
        virtual void          setPreviewCallbackFlag(int flag) = 0;
        virtual status_t      startPreview() = 0;
        virtual void          stopPreview() = 0;
        virtual bool          previewEnabled() = 0;
        virtual status_t      storeMetaDataInBuffers(bool enabled) = 0;
        virtual status_t      startRecording() = 0;
        virtual void          stopRecording() = 0;
        virtual bool          recordingEnabled() = 0;
        virtual void          releaseRecordingFrame(const sp<IMemory>& mem) = 0;
        virtual status_t      autoFocus() = 0;
        virtual status_t      cancelAutoFocus() = 0;
        virtual status_t      takePicture(int msgType) = 0;
        virtual status_t      setParameters(const String8& params) = 0;
        virtual String8       getParameters() const = 0;
        virtual status_t      sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) = 0;

        // Interface used by CameraService
        Client(const sp<CameraService>& cameraService,
                const sp<ICameraClient>& cameraClient,
                int cameraId,
                int cameraFacing,
                int clientPid,
                int servicePid);
        ~Client();

        // return our camera client
        const sp<ICameraClient>&    getCameraClient() {
            return mCameraClient;
        }

        virtual status_t initialize(camera_module_t *module) = 0;

        virtual status_t dump(int fd, const Vector<String16>& args) = 0;

    protected:
        static Mutex*        getClientLockFromCookie(void* user);
        // convert client from cookie. Client lock should be acquired before getting Client.
        static Client*       getClientFromCookie(void* user);

        // the instance is in the middle of destruction. When this is set,
        // the instance should not be accessed from callback.
        // CameraService's mClientLock should be acquired to access this.
        bool                            mDestructionStarted;

        // these are initialized in the constructor.
        sp<CameraService>               mCameraService;  // immutable after constructor
        sp<ICameraClient>               mCameraClient;
        int                             mCameraId;       // immutable after constructor
        int                             mCameraFacing;   // immutable after constructor
        pid_t                           mClientPid;
        pid_t                           mServicePid;     // immutable after constructor

    };

private:
    Mutex               mServiceLock;
    wp<Client>          mClient[MAX_CAMERAS];  // protected by mServiceLock
    Mutex               mClientLock[MAX_CAMERAS]; // prevent Client destruction inside callbacks
    int                 mNumberOfCameras;

    // needs to be called with mServiceLock held
    sp<Client>          findClientUnsafe(const wp<IBinder>& cameraClient, int& outIndex);

    // atomics to record whether the hardware is allocated to some client.
    volatile int32_t    mBusy[MAX_CAMERAS];
    void                setCameraBusy(int cameraId);
    void                setCameraFree(int cameraId);

    // sounds
    MediaPlayer*        newMediaPlayer(const char *file);

    Mutex               mSoundLock;
    sp<MediaPlayer>     mSoundPlayer[NUM_SOUNDS];
    int                 mSoundRef;  // reference count (release all MediaPlayer when 0)

    camera_module_t *mModule;

    // IBinder::DeathRecipient implementation
    virtual void binderDied(const wp<IBinder> &who);
};

} // namespace android

#endif