text: /*
  * Copyright (c) 2009-2017, Intel Corporation
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included
  * in all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  */
  //!
  //! \file     cplib_utils.h
  //! \brief    Utils to interact with CPLib
  //!
  #ifndef __CPLIB_UTILS_H__
  #define __CPLIB_UTILS_H__
  
  #include "mos_util_debug.h"
  
  #include <dlfcn.h>
  #include <unordered_map>
  
  #define CP_STUB_MESSAGE "This function is stubbed as CP is not enabled."
  #define REQUIRED_CPLIB_MAJOR_VERSION 1
  
  #define CPLIB_NORMALMESSAGE(_message, ...)                                    \
  MOS_NORMALMESSAGE(MOS_COMPONENT_CPLIB, MOS_CP_SUBCOMP_CPLIB, _message, ##__VA_ARGS__)
  
  #define CPLIB_ASSERTMESSAGE(_message, ...)                                    \
  MOS_ASSERTMESSAGE(MOS_COMPONENT_CPLIB, MOS_CP_SUBCOMP_CPLIB, _message, ##__VA_ARGS__)
  
  typedef struct VADriverContext* VADriverContextP;
  
  class CPLibUtils
  {
  public:
      CPLibUtils() = delete;
      ~CPLibUtils() = delete;
      CPLibUtils(const CPLibUtils& ) = delete;
      CPLibUtils & operator=(const CPLibUtils& other) = delete;
      
      //!
      //! \brief    Try load CPLIB
      //!
      static bool LoadCPLib(VADriverContextP ctx);
  
      //!
      //! \brief    Unload CPLIB if it is loaded
      //!
      static void UnloadCPLib(VADriverContextP ctx);
  
      //!
      //! \brief    Invoke CPLIB function
      //! \param    [out] _ret
      //!           To store the return of involved function
      //!
      //! \param    [in] *symbol
      //!           The symbol want to involve in CPLIB
      //!
      //! \param    [in] args
      //!           All the args needed for the function you involved in CPLIB
      //!
      template<typename _FuncType, typename _RetType, typename... Args> 
      static void InvokeCpFunc(_RetType& _ret, const char * symbol, Args... args);
  
      //!
      //! \brief    Invoke CPLIB function
      //!
      //! \param    [in] *symbol
      //!           The symbol want to involve in CPLIB
      //!
      //! \param    [in] args
      //!           All the args needed for the function you involved in CPLIB
      //!
      template<typename _FuncType, typename... Args> 
      static void InvokeCpFunc(const char * symbol, Args... args);
  
      static const char* CPLIB_PATH;
      static const char* FUNC_GET_CPLIB_MAJOR_VERSION;
      static const char* FUNC_INIT_CPLIB;
      static const char* FUNC_RELEASE_CPLIB;
      static const char* FUNC_CREATE_DDICP;
      static const char* FUNC_DELETE_DDICP;
      static const char* FUNC_CREATE_MHWCP;
      static const char* FUNC_DELETE_MHWCP;
      static const char* FUNC_CREATE_MOSCP;
      static const char* FUNC_DELETE_MOSCP;
      static const char* FUNC_CREATE_MEDIALIBVACAPSCP;
      static const char* FUNC_DELETE_MEDIALIBVACAPSCP;
      static const char* FUNC_CREATE_SECUREDECODE;
      static const char* FUNC_DELETE_SECUREDECODE;
  
      static std::unordered_map<const char*, void*> m_symbols;
  
  private:
      static void* m_phandle;
  };
  
  template<typename _FuncType, typename _RetType, typename... Args> 
  void CPLibUtils::InvokeCpFunc(_RetType& _ret, const char* symbol, Args... args)
  {
      if (m_symbols.end() != m_symbols.find(symbol))
      {
          _FuncType func = reinterpret_cast<_FuncType>(m_symbols[symbol]);
          if (nullptr != func)
          {
              _ret = func(args...);
              return;
          }
      }
  
      CPLIB_NORMALMESSAGE("Symbol: %s not found in CPLIB", symbol);
  }
  
  template<typename _FuncType, typename... Args> 
  void CPLibUtils::InvokeCpFunc(const char* symbol, Args... args)
  {
      if (m_symbols.end() != m_symbols.find(symbol))
      {
          _FuncType func = reinterpret_cast<_FuncType>(m_symbols[symbol]);
          if (nullptr != func)
          {
              func(args...);
              return;
          }
      }
  
      CPLIB_NORMALMESSAGE("Symbol: %s not found in CPLIB", symbol);
  }
  
  #endif
  