69 lines
2.8 KiB
C++
69 lines
2.8 KiB
C++
/*
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* Copyright (c) 2013 - 2016, The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _AV_EXTENSIONS_COMMON_H_
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#define _AV_EXTENSIONS_COMMON_H_
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namespace android {
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static const char * CUSTOMIZATION_LIB_NAME = "libavenhancements.so";
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typedef void *(*createFunction_t)(void);
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template <typename T>
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struct ExtensionsLoader {
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static T *createInstance(const char *createFunctionName);
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private:
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static void loadLib();
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static createFunction_t loadCreateFunction(const char *createFunctionName);
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static void *mLibHandle;
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};
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/*
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* Boiler-plate to declare the class as a singleton (with a static getter)
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* which can be loaded (dlopen'd) via ExtensionsLoader
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*/
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#define DECLARE_LOADABLE_SINGLETON(className) \
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protected: \
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className(); \
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virtual ~className(); \
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static className *sInst; \
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private: \
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className(const className&); \
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className &operator=(className &); \
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public: \
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static className *get() { \
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return sInst; \
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} \
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friend struct ExtensionsLoader<className>;
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} //namespace android
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#endif // _AV_EXTENSIONS_COMMON_H_
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