ICameraService.cpp revision 35a055b8bfc6f3cbea409b2897caf936654519cb 
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    // connect to camera service
47    virtual sp<ICamera> connect(const sp<ICameraClient>& cameraClient, int cameraId)
48    {
49        Parcel data, reply;
50        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
51        data.writeStrongBinder(cameraClient->asBinder());
52        data.writeInt32(cameraId);
53        remote()->transact(BnCameraService::CONNECT, data, &reply);
54        return interface_cast<ICamera>(reply.readStrongBinder());
55    }
56};
57
58IMPLEMENT_META_INTERFACE(CameraService, "android.hardware.ICameraService");
59
60// ----------------------------------------------------------------------
61
62status_t BnCameraService::onTransact(
63    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
64{
65    switch(code) {
66        case GET_NUMBER_OF_CAMERAS: {
67            CHECK_INTERFACE(ICameraService, data, reply);
68            reply->writeInt32(getNumberOfCameras());
69            return NO_ERROR;
70        } break;
71        case CONNECT: {
72            CHECK_INTERFACE(ICameraService, data, reply);
73            sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());
74            sp<ICamera> camera = connect(cameraClient, data.readInt32());
75            reply->writeStrongBinder(camera->asBinder());
76            return NO_ERROR;
77        } break;
78        default:
79            return BBinder::onTransact(code, data, reply, flags);
80    }
81}
82
83// ----------------------------------------------------------------------------
84
85}; // namespace android
86
87