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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
class AudioPolicyManagerInterface;
class AudioPolicyPluginInterface;
namespace android
{
namespace audio_policy
{
class Engine;
class EngineInstance
{
protected:
EngineInstance();
public:
virtual ~EngineInstance();
/**
* Get Audio Policy Engine instance.
*
* @return pointer to Route Manager Instance object.
*/
static EngineInstance *getInstance();
/**
* Interface query.
* The first client of an interface of the policy engine will start the singleton.
*
* @tparam RequestedInterface: interface that the client is wishing to retrieve.
*
* @return interface handle.
*/
template <class RequestedInterface>
RequestedInterface *queryInterface() const;
protected:
/**
* Get Audio Policy Engine instance.
*
* @return Audio Policy Engine singleton.
*/
Engine *getEngine() const;
private:
/* Copy facilities are put private to disable copy. */
EngineInstance(const EngineInstance &object);
EngineInstance &operator=(const EngineInstance &object);
};
/**
* Limit template instantation to supported type interfaces.
* Compile time error will claim if invalid interface is requested.
*/
template <>
AudioPolicyManagerInterface *EngineInstance::queryInterface() const;
template <>
AudioPolicyPluginInterface *EngineInstance::queryInterface() const;
}; // namespace audio_policy
}; // namespace android
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