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/*
* Copyright (c) 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 media_libva_caps_factory.h
//! \brief Defines one template class to create the instance of DDI MediaLibvaCaps
//!
#ifndef _MEDIA_LIBVA_CAPS_FACTORY_H_
#define _MEDIA_LIBVA_CAPS_FACTORY_H_
#include <map>
#include <string>
#include <vector>
#include <utility>
#include <cstdarg>
//!
//! \class MediaLibvaCapsFactory
//! \brief Media libva caps factory
//!
template <class T, class Arg>
class MediaLibvaCapsFactory
{
public:
typedef T *Type;
typedef Arg *ArgType;
typedef Type (*Creator)(ArgType);
typedef uint32_t KeyType;
typedef std::map<KeyType, Creator> Creators;
typedef typename Creators::iterator iterator;
//!
//! \brief Register one Class C with key.
//! \details Use the member template to register class C with key and C is the
//! derived class of base class T.
//!
//! \param [in] key
//! KeyType, the type alias of std::string.
//!
//! \return True is returned if class C is successfully registerted with key
//! False is returned if key is already registered and doesn't register
//! class C with key.
//!
template <class C>
static bool RegisterCaps(KeyType key)
{
std::pair<iterator, bool> result =
GetCreators().insert(std::make_pair(key, create<C>));
return result.second;
}
//!
//! \brief Create a new object that is registered with key.
//! \details Create and return one new object that is registered with key. And Args is passed to create
//! the new object.
//!
//! \param [in] key
//! KeyType, the type alias of std::string.
//!
//! \param [in] arg
//! ArgType, the type alias of Arg template parameter
//!
//! \return The derived object of T is returned if key is found and the object is created.
//! nullptr is returned if key is not found
//!
static Type CreateCaps(
KeyType key,
ArgType arg)
{
Creators &creators = GetCreators();
iterator creator = creators.find(key);
if (creator != creators.end())
return (creator->second)(arg);
return nullptr;
}
private:
//!
//! \brief The callback function with key.
//! \details The member template to create the derived object
//!
//! \param [in] arg
//! ArgType, the type alias of class template parameter.
//!
//! \return The created object with arg input for C constructor.
//!
template <class C>
static Type create(ArgType arg)
{
return MOS_New(C, arg);
}
//!
//! \brief Obtain the static pair table of key and callback function
//! \details Obtain the static pair table that is registerted with key and callback function
//!
//! \return Return the static pair table about the param @key and callback function
//!
static Creators &GetCreators()
{
static Creators creators;
return creators;
}
};
#endif /* _MEDIA_DDI_FACTORY_H_ */
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