Home | History | Annotate | Download | only in camera 
      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 
     27 namespace android {
     28 
     29 class BpCameraService: public BpInterface<ICameraService>
     30 {
     31 public:
     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 
     70 IMPLEMENT_META_INTERFACE(CameraService, "android.hardware.ICameraService");
     71 
     72 // ----------------------------------------------------------------------
     73 
     74 status_t BnCameraService::onTransact(
     75     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
     76 {
     77     switch(code) {
     78         case GET_NUMBER_OF_CAMERAS: {
     79             CHECK_INTERFACE(ICameraService, data, reply);
     80             reply->writeInt32(getNumberOfCameras());
     81             return NO_ERROR;
     82         } break;
     83         case GET_CAMERA_INFO: {
     84             CHECK_INTERFACE(ICameraService, data, reply);
     85             CameraInfo cameraInfo;
     86             memset(&cameraInfo, 0, sizeof(cameraInfo));
     87             status_t result = getCameraInfo(data.readInt32(), &cameraInfo);
     88             reply->writeInt32(cameraInfo.facing);
     89             reply->writeInt32(cameraInfo.orientation);
     90             reply->writeInt32(result);
     91             return NO_ERROR;
     92         } break;
     93         case CONNECT: {
     94             CHECK_INTERFACE(ICameraService, data, reply);
     95             sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());
     96             sp<ICamera> camera = connect(cameraClient, data.readInt32());
     97             reply->writeStrongBinder(camera->asBinder());
     98             return NO_ERROR;
     99         } break;
    100         default:
    101             return BBinder::onTransact(code, data, reply, flags);
    102     }
    103 }
    104 
    105 // ----------------------------------------------------------------------------
    106 
    107 }; // namespace android
    108 
    109