Home | History | Annotate | Download | only in libmedia 
      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(int event, int triggerSession)
     46     {
     47         Parcel data, reply;
     48         data.writeInterfaceToken(IAudioRecord::getInterfaceDescriptor());
     49         data.writeInt32(event);
     50         data.writeInt32(triggerSession);
     51         status_t status = remote()->transact(START, data, &reply);
     52         if (status == NO_ERROR) {
     53             status = reply.readInt32();
     54         } else {
     55             ALOGW("start() error: %s", strerror(-status));
     56         }
     57         return status;
     58     }
     59 
     60     virtual void stop()
     61     {
     62         Parcel data, reply;
     63         data.writeInterfaceToken(IAudioRecord::getInterfaceDescriptor());
     64         remote()->transact(STOP, data, &reply);
     65     }
     66 
     67     virtual sp<IMemory> getCblk() const
     68     {
     69         Parcel data, reply;
     70         sp<IMemory> cblk;
     71         data.writeInterfaceToken(IAudioRecord::getInterfaceDescriptor());
     72         status_t status = remote()->transact(GET_CBLK, data, &reply);
     73         if (status == NO_ERROR) {
     74             cblk = interface_cast<IMemory>(reply.readStrongBinder());
     75         }
     76         return cblk;
     77     }
     78 };
     79 
     80 IMPLEMENT_META_INTERFACE(AudioRecord, "android.media.IAudioRecord");
     81 
     82 // ----------------------------------------------------------------------
     83 
     84 status_t BnAudioRecord::onTransact(
     85     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
     86 {
     87     switch (code) {
     88         case GET_CBLK: {
     89             CHECK_INTERFACE(IAudioRecord, data, reply);
     90             reply->writeStrongBinder(getCblk()->asBinder());
     91             return NO_ERROR;
     92         } break;
     93         case START: {
     94             CHECK_INTERFACE(IAudioRecord, data, reply);
     95             int event = data.readInt32();
     96             int triggerSession = data.readInt32();
     97             reply->writeInt32(start(event, triggerSession));
     98             return NO_ERROR;
     99         } break;
    100         case STOP: {
    101             CHECK_INTERFACE(IAudioRecord, data, reply);
    102             stop();
    103             return NO_ERROR;
    104         } break;
    105         default:
    106             return BBinder::onTransact(code, data, reply, flags);
    107     }
    108 }
    109 
    110 }; // namespace android
    111