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
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtMultimedia module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/qtimer.h>
#include <QtMultimedia/qmediaservice.h>
#include "qmediaservice_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Multimedia)
/*!
\class QMediaService
\brief The QMediaService class provides a common base class for media
service implementations.
\ingroup multimedia-serv
\preliminary
\since 4.7
Media services provide implementations of the functionality promised
by media objects, and allow multiple providers to implement a QMediaObject.
To provide the functionality of a QMediaObject media services implement
QMediaControl interfaces. Services typically implement one core media
control which provides the core feature of a media object, and some
number of additional controls which provide either optional features of
the media object, or features of a secondary media object or peripheral
object.
A pointer to media service's QMediaControl implementation can be
obtained by passing the control's interface name to the control() function.
\code
QMediaPlayerControl *control = qobject_cast<QMediaPlayerControl *>(
service->control("com.nokia.Qt.QMediaPlayerControl/1.0"));
\endcode
Media objects can use services loaded dynamically from plug-ins or
implemented statically within an applications. Plug-in based services
should also implement the QMediaServiceProviderPlugin interface. Static
services should implement the QMediaServiceProvider interface.
\sa QMediaObject, QMediaControl, QMediaServiceProvider, QMediaServiceProviderPlugin
*/
/*!
Construct a media service with the given \a parent. This class is meant as a
base class for Multimedia services so this constructor is protected.
*/
QMediaService::QMediaService(QObject *parent)
: QObject(parent)
, d_ptr(new QMediaServicePrivate)
{
d_ptr->q_ptr = this;
}
/*!
\internal
*/
QMediaService::QMediaService(QMediaServicePrivate &dd, QObject *parent)
: QObject(parent)
, d_ptr(&dd)
{
d_ptr->q_ptr = this;
}
/*!
Destroys a media service.
*/
QMediaService::~QMediaService()
{
delete d_ptr;
}
/*!
\fn QMediaService::control(const char *interface) const
Returns a pointer to the media control implementing \a interface.
If the service does not implement the control a null pointer is returned instead.
*/
/*!
\fn QMediaService::control() const
Returns a pointer to the media control of type T implemented by a media service.
If the service does not implment the control a null pointer is returned instead.
*/
#include "moc_qmediaservice.cpp"
QT_END_NAMESPACE
QT_END_HEADER
|
