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      1 /*
      2 **
      3 ** Copyright 2013, 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 "IProCameraCallbacks"
     20 #include <utils/Log.h>
     21 #include <stdint.h>
     22 #include <sys/types.h>
     23 
     24 #include <binder/Parcel.h>
     25 #include <gui/IGraphicBufferProducer.h>
     26 #include <gui/Surface.h>
     27 #include <utils/Mutex.h>
     28 
     29 #include <camera/IProCameraCallbacks.h>
     30 
     31 #include <system/camera_metadata.h>
     32 
     33 namespace android {
     34 
     35 enum {
     36     NOTIFY_CALLBACK = IBinder::FIRST_CALL_TRANSACTION,
     37     LOCK_STATUS_CHANGED,
     38     RESULT_RECEIVED,
     39 };
     40 
     41 void readMetadata(const Parcel& data, camera_metadata_t** out);
     42 void writeMetadata(Parcel& data, camera_metadata_t* metadata);
     43 
     44 class BpProCameraCallbacks: public BpInterface<IProCameraCallbacks>
     45 {
     46 public:
     47     BpProCameraCallbacks(const sp<IBinder>& impl)
     48         : BpInterface<IProCameraCallbacks>(impl)
     49     {
     50     }
     51 
     52     // generic callback from camera service to app
     53     void notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2)
     54     {
     55         ALOGV("notifyCallback");
     56         Parcel data, reply;
     57         data.writeInterfaceToken(IProCameraCallbacks::getInterfaceDescriptor());
     58         data.writeInt32(msgType);
     59         data.writeInt32(ext1);
     60         data.writeInt32(ext2);
     61         remote()->transact(NOTIFY_CALLBACK, data, &reply, IBinder::FLAG_ONEWAY);
     62     }
     63 
     64     void onLockStatusChanged(LockStatus newLockStatus) {
     65         ALOGV("onLockStatusChanged");
     66         Parcel data, reply;
     67         data.writeInterfaceToken(IProCameraCallbacks::getInterfaceDescriptor());
     68         data.writeInt32(newLockStatus);
     69         remote()->transact(LOCK_STATUS_CHANGED, data, &reply,
     70                            IBinder::FLAG_ONEWAY);
     71     }
     72 
     73     void onResultReceived(int32_t frameId, camera_metadata* result) {
     74         ALOGV("onResultReceived");
     75         Parcel data, reply;
     76         data.writeInterfaceToken(IProCameraCallbacks::getInterfaceDescriptor());
     77         data.writeInt32(frameId);
     78         writeMetadata(data, result);
     79         remote()->transact(RESULT_RECEIVED, data, &reply, IBinder::FLAG_ONEWAY);
     80     }
     81 };
     82 
     83 IMPLEMENT_META_INTERFACE(ProCameraCallbacks,
     84                                         "android.hardware.IProCameraCallbacks");
     85 
     86 // ----------------------------------------------------------------------
     87 
     88 status_t BnProCameraCallbacks::onTransact(
     89     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
     90 {
     91     ALOGV("onTransact - code = %d", code);
     92     switch(code) {
     93         case NOTIFY_CALLBACK: {
     94             ALOGV("NOTIFY_CALLBACK");
     95             CHECK_INTERFACE(IProCameraCallbacks, data, reply);
     96             int32_t msgType = data.readInt32();
     97             int32_t ext1 = data.readInt32();
     98             int32_t ext2 = data.readInt32();
     99             notifyCallback(msgType, ext1, ext2);
    100             return NO_ERROR;
    101         } break;
    102         case LOCK_STATUS_CHANGED: {
    103             ALOGV("LOCK_STATUS_CHANGED");
    104             CHECK_INTERFACE(IProCameraCallbacks, data, reply);
    105             LockStatus newLockStatus
    106                                  = static_cast<LockStatus>(data.readInt32());
    107             onLockStatusChanged(newLockStatus);
    108             return NO_ERROR;
    109         } break;
    110         case RESULT_RECEIVED: {
    111             ALOGV("RESULT_RECEIVED");
    112             CHECK_INTERFACE(IProCameraCallbacks, data, reply);
    113             int32_t frameId = data.readInt32();
    114             camera_metadata_t *result = NULL;
    115             readMetadata(data, &result);
    116             onResultReceived(frameId, result);
    117             return NO_ERROR;
    118             break;
    119         }
    120         default:
    121             return BBinder::onTransact(code, data, reply, flags);
    122     }
    123 }
    124 
    125 // ----------------------------------------------------------------------------
    126 
    127 }; // namespace android
    128 
    129