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      1 /*
      2 **
      3 ** Copyright 2014, 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 "ISoundTrigger"
     19 #include <utils/Log.h>
     20 #include <utils/Errors.h>
     21 #include <binder/IMemory.h>
     22 #include <soundtrigger/ISoundTrigger.h>
     23 #include <soundtrigger/ISoundTriggerHwService.h>
     24 #include <soundtrigger/ISoundTriggerClient.h>
     25 #include <system/sound_trigger.h>
     26 
     27 namespace android {
     28 
     29 enum {
     30     DETACH = IBinder::FIRST_CALL_TRANSACTION,
     31     LOAD_SOUND_MODEL,
     32     UNLOAD_SOUND_MODEL,
     33     START_RECOGNITION,
     34     STOP_RECOGNITION,
     35 };
     36 
     37 class BpSoundTrigger: public BpInterface<ISoundTrigger>
     38 {
     39 public:
     40     BpSoundTrigger(const sp<IBinder>& impl)
     41         : BpInterface<ISoundTrigger>(impl)
     42     {
     43     }
     44 
     45     void detach()
     46     {
     47         ALOGV("detach");
     48         Parcel data, reply;
     49         data.writeInterfaceToken(ISoundTrigger::getInterfaceDescriptor());
     50         remote()->transact(DETACH, data, &reply);
     51     }
     52 
     53     status_t loadSoundModel(const sp<IMemory>&  modelMemory,
     54                                     sound_model_handle_t *handle)
     55     {
     56         if (modelMemory == 0 || handle == NULL) {
     57             return BAD_VALUE;
     58         }
     59         Parcel data, reply;
     60         data.writeInterfaceToken(ISoundTrigger::getInterfaceDescriptor());
     61         data.writeStrongBinder(IInterface::asBinder(modelMemory));
     62         status_t status = remote()->transact(LOAD_SOUND_MODEL, data, &reply);
     63         if (status != NO_ERROR ||
     64                 (status = (status_t)reply.readInt32()) != NO_ERROR) {
     65             return status;
     66         }
     67         reply.read(handle, sizeof(sound_model_handle_t));
     68         return status;
     69     }
     70 
     71     virtual status_t unloadSoundModel(sound_model_handle_t handle)
     72     {
     73         Parcel data, reply;
     74         data.writeInterfaceToken(ISoundTrigger::getInterfaceDescriptor());
     75         data.write(&handle, sizeof(sound_model_handle_t));
     76         status_t status = remote()->transact(UNLOAD_SOUND_MODEL, data, &reply);
     77         if (status != NO_ERROR) {
     78             status = (status_t)reply.readInt32();
     79         }
     80         return status;
     81     }
     82 
     83     virtual status_t startRecognition(sound_model_handle_t handle,
     84                                       const sp<IMemory>& dataMemory)
     85     {
     86         Parcel data, reply;
     87         data.writeInterfaceToken(ISoundTrigger::getInterfaceDescriptor());
     88         data.write(&handle, sizeof(sound_model_handle_t));
     89         if (dataMemory == 0) {
     90             data.writeInt32(0);
     91         } else {
     92             data.writeInt32(dataMemory->size());
     93         }
     94         data.writeStrongBinder(IInterface::asBinder(dataMemory));
     95         status_t status = remote()->transact(START_RECOGNITION, data, &reply);
     96         if (status != NO_ERROR) {
     97             status = (status_t)reply.readInt32();
     98         }
     99         return status;
    100     }
    101 
    102     virtual status_t stopRecognition(sound_model_handle_t handle)
    103     {
    104         Parcel data, reply;
    105         data.writeInterfaceToken(ISoundTrigger::getInterfaceDescriptor());
    106         data.write(&handle, sizeof(sound_model_handle_t));
    107         status_t status = remote()->transact(STOP_RECOGNITION, data, &reply);
    108         if (status != NO_ERROR) {
    109             status = (status_t)reply.readInt32();
    110         }
    111         return status;
    112     }
    113 
    114 };
    115 
    116 IMPLEMENT_META_INTERFACE(SoundTrigger, "android.hardware.ISoundTrigger");
    117 
    118 // ----------------------------------------------------------------------
    119 
    120 status_t BnSoundTrigger::onTransact(
    121     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
    122 {
    123     switch(code) {
    124         case DETACH: {
    125             ALOGV("DETACH");
    126             CHECK_INTERFACE(ISoundTrigger, data, reply);
    127             detach();
    128             return NO_ERROR;
    129         } break;
    130         case LOAD_SOUND_MODEL: {
    131             CHECK_INTERFACE(ISoundTrigger, data, reply);
    132             sp<IMemory> modelMemory = interface_cast<IMemory>(
    133                 data.readStrongBinder());
    134             sound_model_handle_t handle;
    135             status_t status = loadSoundModel(modelMemory, &handle);
    136             reply->writeInt32(status);
    137             if (status == NO_ERROR) {
    138                 reply->write(&handle, sizeof(sound_model_handle_t));
    139             }
    140             return NO_ERROR;
    141         }
    142         case UNLOAD_SOUND_MODEL: {
    143             CHECK_INTERFACE(ISoundTrigger, data, reply);
    144             sound_model_handle_t handle;
    145             data.read(&handle, sizeof(sound_model_handle_t));
    146             status_t status = unloadSoundModel(handle);
    147             reply->writeInt32(status);
    148             return NO_ERROR;
    149         }
    150         case START_RECOGNITION: {
    151             CHECK_INTERFACE(ISoundTrigger, data, reply);
    152             sound_model_handle_t handle;
    153             data.read(&handle, sizeof(sound_model_handle_t));
    154             sp<IMemory> dataMemory;
    155             if (data.readInt32() != 0) {
    156                 dataMemory = interface_cast<IMemory>(data.readStrongBinder());
    157             }
    158             status_t status = startRecognition(handle, dataMemory);
    159             reply->writeInt32(status);
    160             return NO_ERROR;
    161         }
    162         case STOP_RECOGNITION: {
    163             CHECK_INTERFACE(ISoundTrigger, data, reply);
    164             sound_model_handle_t handle;
    165             data.read(&handle, sizeof(sound_model_handle_t));
    166             status_t status = stopRecognition(handle);
    167             reply->writeInt32(status);
    168             return NO_ERROR;
    169         }
    170         default:
    171             return BBinder::onTransact(code, data, reply, flags);
    172     }
    173 }
    174 
    175 // ----------------------------------------------------------------------------
    176 
    177 }; // namespace android
    178