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      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 //#define LOG_NDEBUG 0
     19 #define LOG_TAG "ICameraClient"
     20 #include <utils/Log.h>
     21 #include <stdint.h>
     22 #include <sys/types.h>
     23 #include <camera/ICameraClient.h>
     24 
     25 namespace android {
     26 
     27 enum {
     28     NOTIFY_CALLBACK = IBinder::FIRST_CALL_TRANSACTION,
     29     DATA_CALLBACK,
     30     DATA_CALLBACK_TIMESTAMP,
     31 };
     32 
     33 class BpCameraClient: public BpInterface<ICameraClient>
     34 {
     35 public:
     36     BpCameraClient(const sp<IBinder>& impl)
     37         : BpInterface<ICameraClient>(impl)
     38     {
     39     }
     40 
     41     // generic callback from camera service to app
     42     void notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2)
     43     {
     44         ALOGV("notifyCallback");
     45         Parcel data, reply;
     46         data.writeInterfaceToken(ICameraClient::getInterfaceDescriptor());
     47         data.writeInt32(msgType);
     48         data.writeInt32(ext1);
     49         data.writeInt32(ext2);
     50         remote()->transact(NOTIFY_CALLBACK, data, &reply, IBinder::FLAG_ONEWAY);
     51     }
     52 
     53     // generic data callback from camera service to app with image data
     54     void dataCallback(int32_t msgType, const sp<IMemory>& imageData,
     55                       camera_frame_metadata_t *metadata)
     56     {
     57         ALOGV("dataCallback");
     58         Parcel data, reply;
     59         data.writeInterfaceToken(ICameraClient::getInterfaceDescriptor());
     60         data.writeInt32(msgType);
     61         data.writeStrongBinder(imageData->asBinder());
     62         if (metadata) {
     63             data.writeInt32(metadata->number_of_faces);
     64             data.write(metadata->faces, sizeof(camera_face_t) * metadata->number_of_faces);
     65         }
     66         remote()->transact(DATA_CALLBACK, data, &reply, IBinder::FLAG_ONEWAY);
     67     }
     68 
     69     // generic data callback from camera service to app with image data
     70     void dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& imageData)
     71     {
     72         ALOGV("dataCallback");
     73         Parcel data, reply;
     74         data.writeInterfaceToken(ICameraClient::getInterfaceDescriptor());
     75         data.writeInt64(timestamp);
     76         data.writeInt32(msgType);
     77         data.writeStrongBinder(imageData->asBinder());
     78         remote()->transact(DATA_CALLBACK_TIMESTAMP, data, &reply, IBinder::FLAG_ONEWAY);
     79     }
     80 };
     81 
     82 IMPLEMENT_META_INTERFACE(CameraClient, "android.hardware.ICameraClient");
     83 
     84 // ----------------------------------------------------------------------
     85 
     86 status_t BnCameraClient::onTransact(
     87     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
     88 {
     89     switch(code) {
     90         case NOTIFY_CALLBACK: {
     91             ALOGV("NOTIFY_CALLBACK");
     92             CHECK_INTERFACE(ICameraClient, data, reply);
     93             int32_t msgType = data.readInt32();
     94             int32_t ext1 = data.readInt32();
     95             int32_t ext2 = data.readInt32();
     96             notifyCallback(msgType, ext1, ext2);
     97             return NO_ERROR;
     98         } break;
     99         case DATA_CALLBACK: {
    100             ALOGV("DATA_CALLBACK");
    101             CHECK_INTERFACE(ICameraClient, data, reply);
    102             int32_t msgType = data.readInt32();
    103             sp<IMemory> imageData = interface_cast<IMemory>(data.readStrongBinder());
    104             camera_frame_metadata_t *metadata = NULL;
    105             if (data.dataAvail() > 0) {
    106                 metadata = new camera_frame_metadata_t;
    107                 metadata->number_of_faces = data.readInt32();
    108                 metadata->faces = (camera_face_t *) data.readInplace(
    109                         sizeof(camera_face_t) * metadata->number_of_faces);
    110             }
    111             dataCallback(msgType, imageData, metadata);
    112             if (metadata) delete metadata;
    113             return NO_ERROR;
    114         } break;
    115         case DATA_CALLBACK_TIMESTAMP: {
    116             ALOGV("DATA_CALLBACK_TIMESTAMP");
    117             CHECK_INTERFACE(ICameraClient, data, reply);
    118             nsecs_t timestamp = data.readInt64();
    119             int32_t msgType = data.readInt32();
    120             sp<IMemory> imageData = interface_cast<IMemory>(data.readStrongBinder());
    121             dataCallbackTimestamp(timestamp, msgType, imageData);
    122             return NO_ERROR;
    123         } break;
    124         default:
    125             return BBinder::onTransact(code, data, reply, flags);
    126     }
    127 }
    128 
    129 // ----------------------------------------------------------------------------
    130 
    131 }; // namespace android
    132 
    133