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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 "ICameraDeviceCallbacks"
     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/camera2/ICameraDeviceCallbacks.h>
     30 #include "camera/CameraMetadata.h"
     31 
     32 namespace android {
     33 
     34 enum {
     35     CAMERA_ERROR = IBinder::FIRST_CALL_TRANSACTION,
     36     CAMERA_IDLE,
     37     CAPTURE_STARTED,
     38     RESULT_RECEIVED,
     39 };
     40 
     41 class BpCameraDeviceCallbacks: public BpInterface<ICameraDeviceCallbacks>
     42 {
     43 public:
     44     BpCameraDeviceCallbacks(const sp<IBinder>& impl)
     45         : BpInterface<ICameraDeviceCallbacks>(impl)
     46     {
     47     }
     48 
     49     void onDeviceError(CameraErrorCode errorCode)
     50     {
     51         ALOGV("onDeviceError");
     52         Parcel data, reply;
     53         data.writeInterfaceToken(ICameraDeviceCallbacks::getInterfaceDescriptor());
     54         data.writeInt32(static_cast<int32_t>(errorCode));
     55         remote()->transact(CAMERA_ERROR, data, &reply, IBinder::FLAG_ONEWAY);
     56         data.writeNoException();
     57     }
     58 
     59     void onDeviceIdle()
     60     {
     61         ALOGV("onDeviceIdle");
     62         Parcel data, reply;
     63         data.writeInterfaceToken(ICameraDeviceCallbacks::getInterfaceDescriptor());
     64         remote()->transact(CAMERA_IDLE, data, &reply, IBinder::FLAG_ONEWAY);
     65         data.writeNoException();
     66     }
     67 
     68     void onCaptureStarted(int32_t requestId, int64_t timestamp)
     69     {
     70         ALOGV("onCaptureStarted");
     71         Parcel data, reply;
     72         data.writeInterfaceToken(ICameraDeviceCallbacks::getInterfaceDescriptor());
     73         data.writeInt32(requestId);
     74         data.writeInt64(timestamp);
     75         remote()->transact(CAPTURE_STARTED, data, &reply, IBinder::FLAG_ONEWAY);
     76         data.writeNoException();
     77     }
     78 
     79 
     80     void onResultReceived(int32_t requestId, const CameraMetadata& result) {
     81         ALOGV("onResultReceived");
     82         Parcel data, reply;
     83         data.writeInterfaceToken(ICameraDeviceCallbacks::getInterfaceDescriptor());
     84         data.writeInt32(requestId);
     85         data.writeInt32(1); // to mark presence of metadata object
     86         result.writeToParcel(&data);
     87         remote()->transact(RESULT_RECEIVED, data, &reply, IBinder::FLAG_ONEWAY);
     88         data.writeNoException();
     89     }
     90 };
     91 
     92 IMPLEMENT_META_INTERFACE(CameraDeviceCallbacks,
     93                          "android.hardware.camera2.ICameraDeviceCallbacks");
     94 
     95 // ----------------------------------------------------------------------
     96 
     97 status_t BnCameraDeviceCallbacks::onTransact(
     98     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
     99 {
    100     ALOGV("onTransact - code = %d", code);
    101     switch(code) {
    102         case CAMERA_ERROR: {
    103             ALOGV("onDeviceError");
    104             CHECK_INTERFACE(ICameraDeviceCallbacks, data, reply);
    105             CameraErrorCode errorCode =
    106                     static_cast<CameraErrorCode>(data.readInt32());
    107             onDeviceError(errorCode);
    108             data.readExceptionCode();
    109             return NO_ERROR;
    110         } break;
    111         case CAMERA_IDLE: {
    112             ALOGV("onDeviceIdle");
    113             CHECK_INTERFACE(ICameraDeviceCallbacks, data, reply);
    114             onDeviceIdle();
    115             data.readExceptionCode();
    116             return NO_ERROR;
    117         } break;
    118         case CAPTURE_STARTED: {
    119             ALOGV("onCaptureStarted");
    120             CHECK_INTERFACE(ICameraDeviceCallbacks, data, reply);
    121             int32_t requestId = data.readInt32();
    122             int64_t timestamp = data.readInt64();
    123             onCaptureStarted(requestId, timestamp);
    124             data.readExceptionCode();
    125             return NO_ERROR;
    126         } break;
    127         case RESULT_RECEIVED: {
    128             ALOGV("onResultReceived");
    129             CHECK_INTERFACE(ICameraDeviceCallbacks, data, reply);
    130             int32_t requestId = data.readInt32();
    131             CameraMetadata result;
    132             if (data.readInt32() != 0) {
    133                 result.readFromParcel(const_cast<Parcel*>(&data));
    134             } else {
    135                 ALOGW("No metadata object is present in result");
    136             }
    137             onResultReceived(requestId, result);
    138             data.readExceptionCode();
    139             return NO_ERROR;
    140         } break;
    141         default:
    142             return BBinder::onTransact(code, data, reply, flags);
    143     }
    144 }
    145 
    146 // ----------------------------------------------------------------------------
    147 
    148 }; // namespace android
    149