ICameraService.cpp revision 2fd2440d0175ca3e196b01b7541a9e0d4ed9a694 
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                                bool force, bool keep)
61    {
62        Parcel data, reply;
63        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
64        data.writeStrongBinder(cameraClient->asBinder());
65        data.writeInt32(cameraId);
66        data.writeInt32(force);
67        data.writeInt32(keep);
68        remote()->transact(BnCameraService::CONNECT, data, &reply);
69        return interface_cast<ICamera>(reply.readStrongBinder());
70    }
71};
72
73IMPLEMENT_META_INTERFACE(CameraService, "android.hardware.ICameraService");
74
75// ----------------------------------------------------------------------
76
77status_t BnCameraService::onTransact(
78    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
79{
80    switch(code) {
81        case GET_NUMBER_OF_CAMERAS: {
82            CHECK_INTERFACE(ICameraService, data, reply);
83            reply->writeInt32(getNumberOfCameras());
84            return NO_ERROR;
85        } break;
86        case GET_CAMERA_INFO: {
87            CHECK_INTERFACE(ICameraService, data, reply);
88            CameraInfo cameraInfo;
89            memset(&cameraInfo, 0, sizeof(cameraInfo));
90            status_t result = getCameraInfo(data.readInt32(), &cameraInfo);
91            reply->writeInt32(cameraInfo.facing);
92            reply->writeInt32(cameraInfo.orientation);
93            reply->writeInt32(result);
94            return NO_ERROR;
95        } break;
96        case CONNECT: {
97            CHECK_INTERFACE(ICameraService, data, reply);
98            sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());
99            const int cameraId = data.readInt32();
100            const int force = data.readInt32();
101            const int keep = data.readInt32();
102            sp<ICamera> camera = connect(cameraClient, cameraId, force, keep);
103            reply->writeStrongBinder(camera->asBinder());
104            return NO_ERROR;
105        } break;
106        default:
107            return BBinder::onTransact(code, data, reply, flags);
108    }
109}
110
111// ----------------------------------------------------------------------------
112
113}; // namespace android
114