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      1 /*
      2 **
      3 ** Copyright 2007, 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_TAG "IAudioRecord"
     19 //#define LOG_NDEBUG 0
     20 #include <utils/Log.h>
     21 
     22 #include <stdint.h>
     23 #include <sys/types.h>
     24 
     25 #include <binder/Parcel.h>
     26 
     27 #include <media/IAudioRecord.h>
     28 
     29 namespace android {
     30 
     31 enum {
     32     GET_CBLK = IBinder::FIRST_CALL_TRANSACTION,
     33     START,
     34     STOP
     35 };
     36 
     37 class BpAudioRecord : public BpInterface<IAudioRecord>
     38 {
     39 public:
     40     BpAudioRecord(const sp<IBinder>& impl)
     41         : BpInterface<IAudioRecord>(impl)
     42     {
     43     }
     44 
     45     virtual status_t start()
     46     {
     47         Parcel data, reply;
     48         data.writeInterfaceToken(IAudioRecord::getInterfaceDescriptor());
     49         status_t status = remote()->transact(START, data, &reply);
     50         if (status == NO_ERROR) {
     51             status = reply.readInt32();
     52         } else {
     53             LOGW("start() error: %s", strerror(-status));
     54         }
     55         return status;
     56     }
     57 
     58     virtual void stop()
     59     {
     60         Parcel data, reply;
     61         data.writeInterfaceToken(IAudioRecord::getInterfaceDescriptor());
     62         remote()->transact(STOP, data, &reply);
     63     }
     64 
     65     virtual sp<IMemory> getCblk() const
     66     {
     67         Parcel data, reply;
     68         sp<IMemory> cblk;
     69         data.writeInterfaceToken(IAudioRecord::getInterfaceDescriptor());
     70         status_t status = remote()->transact(GET_CBLK, data, &reply);
     71         if (status == NO_ERROR) {
     72             cblk = interface_cast<IMemory>(reply.readStrongBinder());
     73         }
     74         return cblk;
     75     }
     76 };
     77 
     78 IMPLEMENT_META_INTERFACE(AudioRecord, "android.media.IAudioRecord");
     79 
     80 // ----------------------------------------------------------------------
     81 
     82 status_t BnAudioRecord::onTransact(
     83     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
     84 {
     85     switch(code) {
     86        case GET_CBLK: {
     87             CHECK_INTERFACE(IAudioRecord, data, reply);
     88             reply->writeStrongBinder(getCblk()->asBinder());
     89             return NO_ERROR;
     90         } break;
     91         case START: {
     92             CHECK_INTERFACE(IAudioRecord, data, reply);
     93             reply->writeInt32(start());
     94             return NO_ERROR;
     95         } break;
     96         case STOP: {
     97             CHECK_INTERFACE(IAudioRecord, data, reply);
     98             stop();
     99             return NO_ERROR;
    100         } break;
    101         default:
    102             return BBinder::onTransact(code, data, reply, flags);
    103     }
    104 }
    105 
    106 }; // namespace android
    107 
    108