1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* Copyright (c) 2013-2018, 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_interfaces.h
//! \brief Helps with gen-specific factory creation.
//!
#ifndef __MEDIA_INTERFACES_H__
#define __MEDIA_INTERFACES_H__
#include <map>
#include "mos_utilities.h"
//!
//! \class MediaInterfacesFactory
//! \brief Media interfaces factory
//!
template <class T>
class MediaInterfacesFactory
{
public:
typedef T *Type;
typedef uint32_t KeyType;
typedef Type (*Creator)();
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 uint32_t.
//!
//! \param [in] forceReplace
//! if force to replace the exsiting Creator, default is false.
//!
//! \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 RegisterHal(KeyType key, bool forceReplace = false)
{
Creators &creators = GetCreators();
Iterator creator = creators.find(key);
if (creator == creators.end())
{
std::pair<Iterator, bool> result =
GetCreators().insert(std::make_pair(key, Create<C>));
return result.second;
}
else
{
if (forceReplace)
{
creators.erase(creator);
std::pair<Iterator, bool> result =
GetCreators().insert(std::make_pair(key, Create<C>));
return result.second;
}
return true;
}
}
//!
//! \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 uint32_t.
//!
//! \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 CreateHal(
KeyType key)
{
Creators &creators = GetCreators();
Iterator creator = creators.find(key);
if (creator != creators.end())
{
return (creator->second)();
}
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()
{
return MOS_New(C);
}
//!
//! \brief obtain the static pair table of param@ key and callback function
//! \details obtain the static pair table that is registerted with param@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_INTERFACES_H__
|
