/usr/share/qt5/doc/qtmultimedia/qmediaservice.html is in qtmultimedia5-doc-html 5.2.1-0ubuntu5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- qmediaservice.cpp -->
<title>QMediaService Class | QtMultimedia 5.2</title>
<link rel="stylesheet" type="text/css" href="style/offline.css" />
</head>
<body>
<div class="header" id="qtdocheader">
<div class="main">
<div class="main-rounded">
<div class="navigationbar">
<ul>
<li>Qt 5.2</li>
<li><a href="qtmultimedia-index.html">Qt Multimedia</a></li>
<li><a href="qtmultimedia-module.html">C++ Classes</a></li>
<li>QMediaService</li>
<li id="buildversion">
Qt 5.2.1 Reference Documentation</li>
</ul>
</div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="toc">
<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#protected-functions">Protected Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
</ul>
</div>
<h1 class="title">QMediaService Class</h1>
<!-- $$$QMediaService-brief -->
<p>The QMediaService class provides a common base class for media service implementations. <a href="#details">More...</a></p>
<!-- @@@QMediaService -->
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> </b><tt><span class="preprocessor">#include <QMediaService></span>
</tt></td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> <tt>QT += multimedia</tt></td></tr></table><ul>
<li><a href="qmediaservice-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmediaservice.html#dtor.QMediaService">~QMediaService</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmediaservice.html#releaseControl">releaseControl</a></b>(QMediaControl *<i> control</i>) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QMediaControl * </td><td class="memItemRight bottomAlign"><b><a href="qmediaservice.html#requestControl">requestControl</a></b>(const char *<i> interface</i>) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> T </td><td class="memItemRight bottomAlign"><b><a href="qmediaservice.html#requestControl-2">requestControl</a></b>()</td></tr>
</table>
<a name="protected-functions"></a>
<h2>Protected Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmediaservice.html#QMediaService">QMediaService</a></b>(QObject *<i> parent</i>)</td></tr>
</table>
<a name="details"></a>
<!-- $$$QMediaService-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QMediaService class provides a common base class for media service implementations.</p>
<p>Media services provide implementations of the functionality promised by media objects, and allow multiple providers to implement a <a href="qmediaobject.html">QMediaObject</a>.</p>
<p>To provide the functionality of a <a href="qmediaobject.html">QMediaObject</a> media services implement <a href="qmediacontrol.html">QMediaControl</a> 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.</p>
<p>A pointer to media service's <a href="qmediacontrol.html">QMediaControl</a> implementation can be obtained by passing the control's interface name to the <a href="qmediaservice.html#requestControl">requestControl</a>() function.</p>
<pre class="cpp"><span class="type"><a href="qmediaplayercontrol.html">QMediaPlayerControl</a></span> <span class="operator">*</span>control <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qmediaplayercontrol.html">QMediaPlayerControl</a></span> <span class="operator">*</span><span class="operator">></span>(
mediaService<span class="operator">-</span><span class="operator">></span>requestControl(<span class="string">"org.qt-project.qt.mediaplayercontrol/5.0"</span>));</pre>
<p>Media objects can use services loaded dynamically from plug-ins or implemented statically within an applications. Plug-in based services should also implement the <a href="qmediaserviceproviderplugin.html">QMediaServiceProviderPlugin</a> interface. Static services should implement the QMediaServiceProvider interface. In general, implementing a QMediaService is outside of the scope of this documentation and support on the relevant mailing lists or IRC channels should be sought.</p>
</div>
<p><b>See also </b><a href="qmediaobject.html">QMediaObject</a> and <a href="qmediacontrol.html">QMediaControl</a>.</p>
<!-- @@@QMediaService -->
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QMediaService[overload1]$$$QMediaServiceQObject* -->
<h3 class="fn"><a name="QMediaService"></a>QMediaService::<span class="name">QMediaService</span>(<span class="type">QObject</span> *<i> parent</i>)<tt> [protected]</tt></h3>
<p>Construct a media service with the given <i>parent</i>. This class is meant as a base class for Multimedia services so this constructor is protected.</p>
<!-- @@@QMediaService -->
<!-- $$$~QMediaService[overload1]$$$~QMediaService -->
<h3 class="fn"><a name="dtor.QMediaService"></a>QMediaService::<span class="name">~QMediaService</span>()</h3>
<p>Destroys a media service.</p>
<!-- @@@~QMediaService -->
<!-- $$$releaseControl[overload1]$$$releaseControlQMediaControl* -->
<h3 class="fn"><a name="releaseControl"></a><span class="type">void</span> QMediaService::<span class="name">releaseControl</span>(<span class="type"><a href="qmediacontrol.html">QMediaControl</a></span> *<i> control</i>)<tt> [pure virtual]</tt></h3>
<p>Releases a <i>control</i> back to the service.</p>
<!-- @@@releaseControl -->
<!-- $$$requestControl[overload1]$$$requestControlconstchar* -->
<h3 class="fn"><a name="requestControl"></a><span class="type"><a href="qmediacontrol.html">QMediaControl</a></span> * QMediaService::<span class="name">requestControl</span>(const <span class="type">char</span> *<i> interface</i>)<tt> [pure virtual]</tt></h3>
<p>Returns a pointer to the media control implementing <i>interface</i>.</p>
<p>If the service does not implement the control, or if it is unavailable a null pointer is returned instead.</p>
<p>Controls must be returned to the service when no longer needed using the <a href="qmediaservice.html#releaseControl">releaseControl</a>() function.</p>
<!-- @@@requestControl -->
<!-- $$$requestControl$$$requestControl -->
<h3 class="fn"><a name="requestControl-2"></a><span class="type">T</span> QMediaService::<span class="name">requestControl</span>()</h3>
<p>Returns a pointer to the media control of type T implemented by a media service.</p>
<p>If the service does not implement the control, or if it is unavailable a null pointer is returned instead.</p>
<p>Controls must be returned to the service when no longer needed using the <a href="qmediaservice.html#releaseControl">releaseControl</a>() function.</p>
<!-- @@@requestControl -->
</div>
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its
subsidiaries. Documentation contributions included herein are the copyrights of
their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Digia, Qt and their respective logos are trademarks of Digia Plc in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners. </p>
</div>
</body>
</html>
|