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      1 /* //device/extlibs/pv/android/IAudioTrack.cpp
      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 "IAudioTrack"
     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/IAudioTrack.h>
     28 
     29 namespace android {
     30 
     31 enum {
     32     GET_CBLK = IBinder::FIRST_CALL_TRANSACTION,
     33     START,
     34     STOP,
     35     FLUSH,
     36     MUTE,
     37     PAUSE,
     38     ATTACH_AUX_EFFECT
     39 };
     40 
     41 class BpAudioTrack : public BpInterface<IAudioTrack>
     42 {
     43 public:
     44     BpAudioTrack(const sp<IBinder>& impl)
     45         : BpInterface<IAudioTrack>(impl)
     46     {
     47     }
     48 
     49     virtual status_t start()
     50     {
     51         Parcel data, reply;
     52         data.writeInterfaceToken(IAudioTrack::getInterfaceDescriptor());
     53         status_t status = remote()->transact(START, data, &reply);
     54         if (status == NO_ERROR) {
     55             status = reply.readInt32();
     56         } else {
     57             LOGW("start() error: %s", strerror(-status));
     58         }
     59         return status;
     60     }
     61 
     62     virtual void stop()
     63     {
     64         Parcel data, reply;
     65         data.writeInterfaceToken(IAudioTrack::getInterfaceDescriptor());
     66         remote()->transact(STOP, data, &reply);
     67     }
     68 
     69     virtual void flush()
     70     {
     71         Parcel data, reply;
     72         data.writeInterfaceToken(IAudioTrack::getInterfaceDescriptor());
     73         remote()->transact(FLUSH, data, &reply);
     74     }
     75 
     76     virtual void mute(bool e)
     77     {
     78         Parcel data, reply;
     79         data.writeInterfaceToken(IAudioTrack::getInterfaceDescriptor());
     80         data.writeInt32(e);
     81         remote()->transact(MUTE, data, &reply);
     82     }
     83 
     84     virtual void pause()
     85     {
     86         Parcel data, reply;
     87         data.writeInterfaceToken(IAudioTrack::getInterfaceDescriptor());
     88         remote()->transact(PAUSE, data, &reply);
     89     }
     90 
     91     virtual sp<IMemory> getCblk() const
     92     {
     93         Parcel data, reply;
     94         sp<IMemory> cblk;
     95         data.writeInterfaceToken(IAudioTrack::getInterfaceDescriptor());
     96         status_t status = remote()->transact(GET_CBLK, data, &reply);
     97         if (status == NO_ERROR) {
     98             cblk = interface_cast<IMemory>(reply.readStrongBinder());
     99         }
    100         return cblk;
    101     }
    102 
    103     virtual status_t attachAuxEffect(int effectId)
    104     {
    105         Parcel data, reply;
    106         data.writeInterfaceToken(IAudioTrack::getInterfaceDescriptor());
    107         data.writeInt32(effectId);
    108         status_t status = remote()->transact(ATTACH_AUX_EFFECT, data, &reply);
    109         if (status == NO_ERROR) {
    110             status = reply.readInt32();
    111         } else {
    112             LOGW("attachAuxEffect() error: %s", strerror(-status));
    113         }
    114         return status;
    115     }
    116 };
    117 
    118 IMPLEMENT_META_INTERFACE(AudioTrack, "android.media.IAudioTrack");
    119 
    120 // ----------------------------------------------------------------------
    121 
    122 status_t BnAudioTrack::onTransact(
    123     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
    124 {
    125     switch(code) {
    126        case GET_CBLK: {
    127             CHECK_INTERFACE(IAudioTrack, data, reply);
    128             reply->writeStrongBinder(getCblk()->asBinder());
    129             return NO_ERROR;
    130         } break;
    131         case START: {
    132             CHECK_INTERFACE(IAudioTrack, data, reply);
    133             reply->writeInt32(start());
    134             return NO_ERROR;
    135         } break;
    136         case STOP: {
    137             CHECK_INTERFACE(IAudioTrack, data, reply);
    138             stop();
    139             return NO_ERROR;
    140         } break;
    141         case FLUSH: {
    142             CHECK_INTERFACE(IAudioTrack, data, reply);
    143             flush();
    144             return NO_ERROR;
    145         } break;
    146         case MUTE: {
    147             CHECK_INTERFACE(IAudioTrack, data, reply);
    148             mute( data.readInt32() );
    149             return NO_ERROR;
    150         } break;
    151         case PAUSE: {
    152             CHECK_INTERFACE(IAudioTrack, data, reply);
    153             pause();
    154             return NO_ERROR;
    155         }
    156         case ATTACH_AUX_EFFECT: {
    157             CHECK_INTERFACE(IAudioTrack, data, reply);
    158             reply->writeInt32(attachAuxEffect(data.readInt32()));
    159             return NO_ERROR;
    160         } break;
    161         default:
    162             return BBinder::onTransact(code, data, reply, flags);
    163     }
    164 }
    165 
    166 }; // namespace android
    167 
    168