summaryrefslogtreecommitdiffstats
path: root/services/camera/libcameraservice/CameraService.h
blob: b0175055915ee2532c36474213d2585be5890f13 (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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
/*
**
** 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 <utils/Vector.h>
#include <binder/AppOpsManager.h>
#include <binder/BinderService.h>
#include <binder/IAppOpsCallback.h>
#include <camera/ICameraService.h>
#include <hardware/camera.h>

/* This needs to be increased if we can have more cameras */
#define MAX_CAMERAS 2

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;
    class BasicClient;

    // Implementation of BinderService<T>
    static char const* getServiceName() { return "media.camera"; }

                        CameraService();
    virtual             ~CameraService();

    /////////////////////////////////////////////////////////////////////
    // ICameraService
    virtual int32_t     getNumberOfCameras();
    virtual status_t    getCameraInfo(int cameraId,
                                      struct CameraInfo* cameraInfo);

    virtual sp<ICamera> connect(const sp<ICameraClient>& cameraClient, int cameraId,
            const String16& clientPackageName, int clientUid);
    virtual sp<IProCameraUser> connect(const sp<IProCameraCallbacks>& cameraCb,
            int cameraId);

    // Extra permissions checks
    virtual status_t    onTransact(uint32_t code, const Parcel& data,
                                   Parcel* reply, uint32_t flags);

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

    /////////////////////////////////////////////////////////////////////
    // Client functionality
    virtual void        removeClientByRemote(const wp<IBinder>& remoteBinder);

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

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


    /////////////////////////////////////////////////////////////////////
    // CameraClient functionality

    // 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);

    class BasicClient : public virtual RefBase {
    public:
        virtual status_t initialize(camera_module_t *module) = 0;

        virtual void          disconnect() = 0;

        wp<IBinder>     getRemote() {
            return mRemoteCallback;
        }

    protected:
        BasicClient(const sp<CameraService>& cameraService,
                const sp<IBinder>& remoteCallback,
                const String16& clientPackageName,
                int cameraId,
                int cameraFacing,
                int clientPid,
                uid_t clientUid,
                int servicePid);

        virtual ~BasicClient();

        // 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.
        // - subclasses should set this to true in their destructors.
        bool                            mDestructionStarted;

        // these are initialized in the constructor.
        sp<CameraService>               mCameraService;  // immutable after constructor
        int                             mCameraId;       // immutable after constructor
        int                             mCameraFacing;   // immutable after constructor
        const String16                  mClientPackageName;
        pid_t                           mClientPid;
        uid_t                           mClientUid;      // immutable after constructor
        pid_t                           mServicePid;     // immutable after constructor

        // - The app-side Binder interface to receive callbacks from us
        wp<IBinder>                     mRemoteCallback; // immutable after constructor

        // permissions management
        status_t                        startCameraOps();
        status_t                        finishCameraOps();

        // Notify client about a fatal error
        virtual void                    notifyError() = 0;
    private:
        AppOpsManager                   mAppOpsManager;

        class OpsCallback : public BnAppOpsCallback {
        public:
            OpsCallback(wp<BasicClient> client);
            virtual void opChanged(int32_t op, const String16& packageName);

        private:
            wp<BasicClient> mClient;

        }; // class OpsCallback

        sp<OpsCallback> mOpsCallback;
        // Track whether startCameraOps was called successfully, to avoid
        // finishing what we didn't start.
        bool            mOpsActive;

        // IAppOpsCallback interface, indirected through opListener
        virtual void opChanged(int32_t op, const String16& packageName);
    }; // class BasicClient

    class Client : public BnCamera, public BasicClient
    {
    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<IGraphicBufferProducer>& bufferProducer)=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,
                const String16& clientPackageName,
                int cameraId,
                int cameraFacing,
                int clientPid,
                uid_t clientUid,
                int servicePid);
        ~Client();

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

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

        virtual void         notifyError();

        // Initialized in constructor

        // - The app-side Binder interface to receive callbacks from us
        sp<ICameraClient>               mCameraClient;

    }; // class Client

    class ProClient : public BnProCameraUser, public BasicClient {
    public:
        ProClient(const sp<CameraService>& cameraService,
                const sp<IProCameraCallbacks>& remoteCallback,
                const String16& clientPackageName,
                int cameraId,
                int cameraFacing,
                int clientPid,
                uid_t clientUid,
                int servicePid);

        virtual ~ProClient();

        const sp<IProCameraCallbacks>& getRemoteCallback() {
            return mRemoteCallback;
        }

        // BasicClient implementation
        virtual status_t initialize(camera_module_t *module);

        /***
            IProCamera implementation
         ***/


        virtual status_t      connect(
                                     const sp<IProCameraCallbacks>& callbacks);
        virtual void          disconnect();

        virtual status_t      exclusiveTryLock();
        virtual status_t      exclusiveLock();
        virtual status_t      exclusiveUnlock();

        virtual bool          hasExclusiveLock();

        // Note that the callee gets a copy of the metadata.
        virtual int           submitRequest(camera_metadata_t* metadata,
                                            bool streaming = false);
        virtual status_t      cancelRequest(int requestId);

        virtual status_t      requestStream(int streamId);
        virtual status_t      cancelStream(int streamId);

    protected:
        virtual void          notifyError();

        sp<IProCameraCallbacks> mRemoteCallback;
    }; // class ProClient

private:

    // Delay-load the Camera HAL module
    virtual void onFirstRef();

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

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

    typedef wp<ProClient> weak_pro_client_ptr;
    Vector<weak_pro_client_ptr> mProClientList[MAX_CAMERAS];

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

    // 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);

    // Helpers
    int                 getDeviceVersion(int cameraId, int* facing);
};

} // namespace android

#endif