ICameraService.cpp revision 48af7e8dd40883d6154e7029d9500072b551b5fa 
1/*
2**
3** Copyright 2008, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#include <stdint.h>
19#include <sys/types.h>
20
21#include <binder/Parcel.h>
22#include <binder/IPCThreadState.h>
23#include <binder/IServiceManager.h>
24
25#include <camera/ICameraService.h>
26
27namespace android {
28
29class BpCameraService: public BpInterface<ICameraService>
30{
31public:
32    BpCameraService(const sp<IBinder>& impl)
33        : BpInterface<ICameraService>(impl)
34    {
35    }
36
37    // get number of cameras available
38    virtual int32_t getNumberOfCameras()
39    {
40        Parcel data, reply;
41        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
42        remote()->transact(BnCameraService::GET_NUMBER_OF_CAMERAS, data, &reply);
43        return reply.readInt32();
44    }
45
46    // get information about a camera
47    virtual status_t getCameraInfo(int cameraId,
48                                   struct CameraInfo* cameraInfo) {
49        Parcel data, reply;
50        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
51        data.writeInt32(cameraId);
52        remote()->transact(BnCameraService::GET_CAMERA_INFO, data, &reply);
53        cameraInfo->facing = reply.readInt32();
54        cameraInfo->orientation = reply.readInt32();
55        return reply.readInt32();
56    }
57
58    // connect to camera service
59    virtual sp<ICamera> connect(const sp<ICameraClient>& cameraClient, int cameraId,
60                                const String16 &clientPackageName, int clientUid)
61    {
62        Parcel data, reply;
63        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
64        data.writeStrongBinder(cameraClient->asBinder());
65        data.writeInt32(cameraId);
66        data.writeString16(clientPackageName);
67        data.writeInt32(clientUid);
68        remote()->transact(BnCameraService::CONNECT, data, &reply);
69        return interface_cast<ICamera>(reply.readStrongBinder());
70    }
71
72    // connect to camera service (pro client)
73    virtual sp<IProCameraUser> connect(const sp<IProCameraCallbacks>& cameraCb, int cameraId)
74    {
75        Parcel data, reply;
76        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
77        data.writeStrongBinder(cameraCb->asBinder());
78        data.writeInt32(cameraId);
79        remote()->transact(BnCameraService::CONNECT_PRO, data, &reply);
80        return interface_cast<IProCameraUser>(reply.readStrongBinder());
81    }
82};
83
84IMPLEMENT_META_INTERFACE(CameraService, "android.hardware.ICameraService");
85
86// ----------------------------------------------------------------------
87
88status_t BnCameraService::onTransact(
89    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
90{
91    switch(code) {
92        case GET_NUMBER_OF_CAMERAS: {
93            CHECK_INTERFACE(ICameraService, data, reply);
94            reply->writeInt32(getNumberOfCameras());
95            return NO_ERROR;
96        } break;
97        case GET_CAMERA_INFO: {
98            CHECK_INTERFACE(ICameraService, data, reply);
99            CameraInfo cameraInfo;
100            memset(&cameraInfo, 0, sizeof(cameraInfo));
101            status_t result = getCameraInfo(data.readInt32(), &cameraInfo);
102            reply->writeInt32(cameraInfo.facing);
103            reply->writeInt32(cameraInfo.orientation);
104            reply->writeInt32(result);
105            return NO_ERROR;
106        } break;
107        case CONNECT: {
108            CHECK_INTERFACE(ICameraService, data, reply);
109            sp<ICameraClient> cameraClient =
110                    interface_cast<ICameraClient>(data.readStrongBinder());
111            int32_t cameraId = data.readInt32();
112            const String16 clientName = data.readString16();
113            int32_t clientUid = data.readInt32();
114            sp<ICamera> camera = connect(cameraClient, cameraId,
115                    clientName, clientUid);
116            reply->writeStrongBinder(camera->asBinder());
117            return NO_ERROR;
118        } break;
119        case CONNECT_PRO: {
120            CHECK_INTERFACE(ICameraService, data, reply);
121            sp<IProCameraCallbacks> cameraClient = interface_cast<IProCameraCallbacks>(data.readStrongBinder());
122            sp<IProCameraUser> camera = connect(cameraClient, data.readInt32());
123            reply->writeStrongBinder(camera->asBinder());
124            return NO_ERROR;
125        } break;
126        default:
127            return BBinder::onTransact(code, data, reply, flags);
128    }
129}
130
131// ----------------------------------------------------------------------------
132
133}; // namespace android
134