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      1 /*
      2  * Copyright (C) 2015 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 "PolicySubsystem.h"
     18 #include "SubsystemObjectFactory.h"
     19 #include "PolicyMappingKeys.h"
     20 #include "Strategy.h"
     21 #include "Stream.h"
     22 #include "InputSource.h"
     23 #include "Usage.h"
     24 #include <AudioPolicyPluginInterface.h>
     25 #include <AudioPolicyEngineInstance.h>
     26 #include <utils/Log.h>
     27 
     28 using android::audio_policy::EngineInstance;
     29 
     30 const char *const PolicySubsystem::mKeyName = "Name";
     31 const char *const PolicySubsystem::mKeyIdentifier = "Identifier";
     32 const char *const PolicySubsystem::mKeyCategory = "Category";
     33 const char *const PolicySubsystem::mKeyAmend1 = "Amend1";
     34 const char *const PolicySubsystem::mKeyAmend2 = "Amend2";
     35 const char *const PolicySubsystem::mKeyAmend3 = "Amend3";
     36 
     37 
     38 const char *const PolicySubsystem::mStreamComponentName = "Stream";
     39 const char *const PolicySubsystem::mStrategyComponentName = "Strategy";
     40 const char *const PolicySubsystem::mInputSourceComponentName = "InputSource";
     41 const char *const PolicySubsystem::mUsageComponentName = "Usage";
     42 
     43 PolicySubsystem::PolicySubsystem(const std::string &name, core::log::Logger &logger)
     44     : CSubsystem(name, logger),
     45       mPluginInterface(NULL)
     46 {
     47     // Try to connect a Plugin Interface from Audio Policy Engine
     48     EngineInstance *engineInstance = EngineInstance::getInstance();
     49 
     50     ALOG_ASSERT(engineInstance != NULL, "NULL Plugin Interface");
     51 
     52     // Retrieve the Route Interface
     53     mPluginInterface = engineInstance->queryInterface<android::AudioPolicyPluginInterface>();
     54     ALOG_ASSERT(mPluginInterface != NULL, "NULL Plugin Interface");
     55 
     56     // Provide mapping keys to the core, necessary when parsing the XML Structure files.
     57     addContextMappingKey(mKeyName);
     58     addContextMappingKey(mKeyCategory);
     59     addContextMappingKey(mKeyIdentifier);
     60     addContextMappingKey(mKeyAmend1);
     61     addContextMappingKey(mKeyAmend2);
     62     addContextMappingKey(mKeyAmend3);
     63 
     64     // Provide creators to upper layer
     65     addSubsystemObjectFactory(
     66         new TSubsystemObjectFactory<Stream>(
     67             mStreamComponentName,
     68             (1 << MappingKeyIdentifier))
     69         );
     70     addSubsystemObjectFactory(
     71         new TSubsystemObjectFactory<Strategy>(
     72             mStrategyComponentName,
     73             (1 << MappingKeyAmend1) | (1 << MappingKeyIdentifier))
     74         );
     75     addSubsystemObjectFactory(
     76         new TSubsystemObjectFactory<Usage>(
     77             mUsageComponentName,
     78             (1 << MappingKeyAmend1) | (1 << MappingKeyIdentifier))
     79         );
     80     addSubsystemObjectFactory(
     81         new TSubsystemObjectFactory<InputSource>(
     82             mInputSourceComponentName,
     83             (1 << MappingKeyAmend1) | (1 << MappingKeyIdentifier))
     84         );
     85 }
     86 
     87 // Retrieve Route interface
     88 android::AudioPolicyPluginInterface *PolicySubsystem::getPolicyPluginInterface() const
     89 {
     90     ALOG_ASSERT(mPluginInterface != NULL, "NULL Plugin Interface");
     91     return mPluginInterface;
     92 }
     93