ICameraService.cpp revision bfb5d5ef5bae01efac171397260a7152782d92c7 
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    {
61        Parcel data, reply;
62        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
63        data.writeStrongBinder(cameraClient->asBinder());
64        data.writeInt32(cameraId);
65        remote()->transact(BnCameraService::CONNECT, data, &reply);
66        return interface_cast<ICamera>(reply.readStrongBinder());
67    }
68
69    // connect to camera service (pro client)
70    virtual sp<IProCameraUser> connect(const sp<IProCameraCallbacks>& cameraCb, int cameraId)
71    {
72        Parcel data, reply;
73        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
74        data.writeStrongBinder(cameraCb->asBinder());
75        data.writeInt32(cameraId);
76        remote()->transact(BnCameraService::CONNECT_PRO, data, &reply);
77        return interface_cast<IProCameraUser>(reply.readStrongBinder());
78    }
79};
80
81IMPLEMENT_META_INTERFACE(CameraService, "android.hardware.ICameraService");
82
83// ----------------------------------------------------------------------
84
85status_t BnCameraService::onTransact(
86    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
87{
88    switch(code) {
89        case GET_NUMBER_OF_CAMERAS: {
90            CHECK_INTERFACE(ICameraService, data, reply);
91            reply->writeInt32(getNumberOfCameras());
92            return NO_ERROR;
93        } break;
94        case GET_CAMERA_INFO: {
95            CHECK_INTERFACE(ICameraService, data, reply);
96            CameraInfo cameraInfo;
97            memset(&cameraInfo, 0, sizeof(cameraInfo));
98            status_t result = getCameraInfo(data.readInt32(), &cameraInfo);
99            reply->writeInt32(cameraInfo.facing);
100            reply->writeInt32(cameraInfo.orientation);
101            reply->writeInt32(result);
102            return NO_ERROR;
103        } break;
104        case CONNECT: {
105            CHECK_INTERFACE(ICameraService, data, reply);
106            sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());
107            sp<ICamera> camera = connect(cameraClient, data.readInt32());
108            reply->writeStrongBinder(camera->asBinder());
109            return NO_ERROR;
110        } break;
111        case CONNECT_PRO: {
112            CHECK_INTERFACE(ICameraService, data, reply);
113            sp<IProCameraCallbacks> cameraClient = interface_cast<IProCameraCallbacks>(data.readStrongBinder());
114            sp<IProCameraUser> camera = connect(cameraClient, data.readInt32());
115            reply->writeStrongBinder(camera->asBinder());
116            return NO_ERROR;
117        } break;
118        default:
119            return BBinder::onTransact(code, data, reply, flags);
120    }
121}
122
123// ----------------------------------------------------------------------------
124
125}; // namespace android
126