camera/ICameraClient.cpp

   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