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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <string.h>
     18 
     19 #define LOG_TAG "DevicesFactoryHalHidl"
     20 //#define LOG_NDEBUG 0
     21 
     22 #include <android/hardware/audio/4.0/IDevice.h>
     23 #include <media/audiohal/hidl/HalDeathHandler.h>
     24 #include <utils/Log.h>
     25 
     26 #include "ConversionHelperHidl.h"
     27 #include "DeviceHalHidl.h"
     28 #include "DevicesFactoryHalHidl.h"
     29 
     30 using ::android::hardware::audio::V4_0::IDevice;
     31 using ::android::hardware::audio::V4_0::Result;
     32 using ::android::hardware::Return;
     33 
     34 namespace android {
     35 namespace V4_0 {
     36 
     37 DevicesFactoryHalHidl::DevicesFactoryHalHidl() {
     38     mDevicesFactory = IDevicesFactory::getService();
     39     if (mDevicesFactory != 0) {
     40         // It is assumed that DevicesFactory is owned by AudioFlinger
     41         // and thus have the same lifespan.
     42         mDevicesFactory->linkToDeath(HalDeathHandler::getInstance(), 0 /*cookie*/);
     43     } else {
     44         ALOGE("Failed to obtain IDevicesFactory service, terminating process.");
     45         exit(1);
     46     }
     47     // The MSD factory is optional
     48     mDevicesFactoryMsd = IDevicesFactory::getService(AUDIO_HAL_SERVICE_NAME_MSD);
     49     // TODO: Register death handler, and add 'restart' directive to audioserver.rc
     50 }
     51 
     52 DevicesFactoryHalHidl::~DevicesFactoryHalHidl() {
     53 }
     54 
     55 status_t DevicesFactoryHalHidl::openDevice(const char *name, sp<DeviceHalInterface> *device) {
     56     if (mDevicesFactory == 0) return NO_INIT;
     57     Result retval = Result::NOT_INITIALIZED;
     58     Return<void> ret = mDevicesFactory->openDevice(
     59             name,
     60             [&](Result r, const sp<IDevice>& result) {
     61                 retval = r;
     62                 if (retval == Result::OK) {
     63                     *device = new DeviceHalHidl(result);
     64                 }
     65             });
     66     if (ret.isOk()) {
     67         if (retval == Result::OK) return OK;
     68         else if (retval == Result::INVALID_ARGUMENTS) return BAD_VALUE;
     69         else return NO_INIT;
     70     }
     71     return FAILED_TRANSACTION;
     72 }
     73 
     74 } // namespace V4_0
     75 } // namespace android
     76