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Diffstat (limited to 'services/audiopolicy/engineconfigurable/include/AudioPolicyEngineInstance.h')
-rwxr-xr-x | services/audiopolicy/engineconfigurable/include/AudioPolicyEngineInstance.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/services/audiopolicy/engineconfigurable/include/AudioPolicyEngineInstance.h b/services/audiopolicy/engineconfigurable/include/AudioPolicyEngineInstance.h new file mode 100755 index 0000000..6c4be2c --- /dev/null +++ b/services/audiopolicy/engineconfigurable/include/AudioPolicyEngineInstance.h @@ -0,0 +1,81 @@ +/* + * 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 |