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<td >Qt 5.9</td><td ><a href="qtmultimedia-index.html">Qt Multimedia</a></td><td ><a href="qtmultimedia-modules.html">C++ Classes</a></td><td >QMediaStreamsControl</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.5 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-types">Public Types</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#protected-functions">Protected Functions</a></li>
<li class="level1"><a href="#macros">Macros</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QMediaStreamsControl Class</h1>
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<p>The <a href="qmediastreamscontrol.html">QMediaStreamsControl</a> class provides a media stream selection control. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QMediaStreamsControl></span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += multimedia</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="qmediacontrol.html">QMediaControl</a></td></tr></table></div><ul>
<li><a href="qmediastreamscontrol-members.html">List of all members, including inherited members</a></li>
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<a name="public-types"></a>
<h2 id="public-types">Public Types</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#StreamType-enum">StreamType</a></b> { AudioStream, VideoStream, SubPictureStream, UnknownStream, DataStream }</td></tr>
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<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#dtor.QMediaStreamsControl">~QMediaStreamsControl</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#isActive">isActive</a></b>(int <i>stream</i>) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QVariant </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#metaData">metaData</a></b>(int <i>stream</i>, const QString &<i>key</i>) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#setActive">setActive</a></b>(int <i>stream</i>, bool <i>state</i>) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#streamCount">streamCount</a></b>() = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual StreamType </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#streamType">streamType</a></b>(int <i>stream</i>) = 0</td></tr>
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<li class="fn">32 public functions inherited from <a href="../qtcore/qobject.html#public-functions">QObject</a></li>
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<a name="signals"></a>
<h2 id="signals">Signals</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#activeStreamsChanged">activeStreamsChanged</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#streamsChanged">streamsChanged</a></b>()</td></tr>
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<li class="fn">2 signals inherited from <a href="../qtcore/qobject.html#signals">QObject</a></li>
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<h2 id="protected-functions">Protected Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#QMediaStreamsControl">QMediaStreamsControl</a></b>(QObject *<i>parent</i> = Q_NULLPTR)</td></tr>
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<li class="fn">9 protected functions inherited from <a href="../qtcore/qobject.html#protected-functions">QObject</a></li>
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<h2 id="macros">Macros</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmediastreamscontrol.html#QMediaStreamsControl_iid">QMediaStreamsControl_iid</a></b></td></tr>
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<h3>Additional Inherited Members</h3>
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<li class="fn">1 property inherited from <a href="../qtcore/qobject.html#properties">QObject</a></li>
<li class="fn">1 public slot inherited from <a href="../qtcore/qobject.html#public-slots">QObject</a></li>
<li class="fn">1 public variable inherited from <a href="../qtcore/qobject.html#public-variables">QObject</a></li>
<li class="fn">10 static public members inherited from <a href="../qtcore/qobject.html#static-public-members">QObject</a></li>
<li class="fn">2 protected variables inherited from <a href="../qtcore/qobject.html#protected-variables">QObject</a></li>
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<a name="details"></a>
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<h2 id="details">Detailed Description</h2>
<p>The <a href="qmediastreamscontrol.html">QMediaStreamsControl</a> class provides a media stream selection control.</p>
<p>The <a href="qmediastreamscontrol.html">QMediaStreamsControl</a> class provides descriptions of the available media streams and allows individual streams to be activated and deactivated.</p>
<p>The interface name of <a href="qmediastreamscontrol.html">QMediaStreamsControl</a> is <code>org.qt-project.qt.mediastreamscontrol/5.0</code> as defined in <a href="qmediastreamscontrol.html#QMediaStreamsControl_iid">QMediaStreamsControl_iid</a>.</p>
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<p><b>See also </b><a href="qmediaservice.html#requestControl-1">QMediaService::requestControl</a>().</p>
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<div class="types">
<h2>Member Type Documentation</h2>
<!-- $$$StreamType$$$UnknownStream$$$VideoStream$$$AudioStream$$$SubPictureStream$$$DataStream -->
<h3 class="fn" id="StreamType-enum"><a name="StreamType-enum"></a>enum QMediaStreamsControl::<span class="name">StreamType</span></h3>
<p>Media stream type.</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>QMediaStreamsControl::AudioStream</code></td><td class="topAlign tblval"><code>2</code></td><td class="topAlign">Audio stream.</td></tr>
<tr><td class="topAlign"><code>QMediaStreamsControl::VideoStream</code></td><td class="topAlign tblval"><code>1</code></td><td class="topAlign">Video stream.</td></tr>
<tr><td class="topAlign"><code>QMediaStreamsControl::SubPictureStream</code></td><td class="topAlign tblval"><code>3</code></td><td class="topAlign">Subpicture or teletext stream.</td></tr>
<tr><td class="topAlign"><code>QMediaStreamsControl::UnknownStream</code></td><td class="topAlign tblval"><code>0</code></td><td class="topAlign">The stream type is unknown.</td></tr>
<tr><td class="topAlign"><code>QMediaStreamsControl::DataStream</code></td><td class="topAlign tblval"><code>4</code></td><td class="topAlign"> </td></tr>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="QMediaStreamsControl"><a name="QMediaStreamsControl"></a><code>[protected] </code>QMediaStreamsControl::<span class="name">QMediaStreamsControl</span>(<span class="type"><a href="../qtcore/qobject.html#QObject">QObject</a></span> *<i>parent</i> = Q_NULLPTR)</h3>
<p>Constructs a new media streams control with the given <i>parent</i>.</p>
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<h3 class="fn" id="dtor.QMediaStreamsControl"><a name="dtor.QMediaStreamsControl"></a><code>[virtual] </code>QMediaStreamsControl::<span class="name">~QMediaStreamsControl</span>()</h3>
<p>Destroys a media streams control.</p>
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<!-- $$$activeStreamsChanged[overload1]$$$activeStreamsChanged -->
<h3 class="fn" id="activeStreamsChanged"><a name="activeStreamsChanged"></a><code>[signal] </code><span class="type">void</span> QMediaStreamsControl::<span class="name">activeStreamsChanged</span>()</h3>
<p>The signal is emitted when the active streams list is changed.</p>
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<h3 class="fn" id="isActive"><a name="isActive"></a><code>[pure virtual] </code><span class="type">bool</span> QMediaStreamsControl::<span class="name">isActive</span>(<span class="type">int</span> <i>stream</i>)</h3>
<p>Returns true if the media <i>stream</i> is active.</p>
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<h3 class="fn" id="metaData"><a name="metaData"></a><code>[pure virtual] </code><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> QMediaStreamsControl::<span class="name">metaData</span>(<span class="type">int</span> <i>stream</i>, const <span class="type"><a href="../qtcore/qstring.html">QString</a></span> &<i>key</i>)</h3>
<p>Returns the meta-data value of <i>key</i> for a given <i>stream</i>.</p>
<p>Useful metadata keys are <a href="qmediametadata.html#Title-var">QMediaMetaData::Title</a>, <a href="qmediametadata.html#Description-var">QMediaMetaData::Description</a> and <a href="qmediametadata.html#Language-var">QMediaMetaData::Language</a>.</p>
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<h3 class="fn" id="setActive"><a name="setActive"></a><code>[pure virtual] </code><span class="type">void</span> QMediaStreamsControl::<span class="name">setActive</span>(<span class="type">int</span> <i>stream</i>, <span class="type">bool</span> <i>state</i>)</h3>
<p>Sets the active <i>state</i> of a media <i>stream</i>.</p>
<p>Setting the active state of a media stream to true will activate it. If any other stream of the same type was previously active it will be deactivated. Setting the active state fo a media stream to false will deactivate it.</p>
<p><b>See also </b><a href="qmediastreamscontrol.html#isActive">isActive</a>().</p>
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<h3 class="fn" id="streamCount"><a name="streamCount"></a><code>[pure virtual] </code><span class="type">int</span> QMediaStreamsControl::<span class="name">streamCount</span>()</h3>
<p>Returns the number of media streams.</p>
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<h3 class="fn" id="streamType"><a name="streamType"></a><code>[pure virtual] </code><span class="type"><a href="qmediastreamscontrol.html#StreamType-enum">StreamType</a></span> QMediaStreamsControl::<span class="name">streamType</span>(<span class="type">int</span> <i>stream</i>)</h3>
<p>Return the type of a media <i>stream</i>.</p>
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<h3 class="fn" id="streamsChanged"><a name="streamsChanged"></a><code>[signal] </code><span class="type">void</span> QMediaStreamsControl::<span class="name">streamsChanged</span>()</h3>
<p>The signal is emitted when the available streams list is changed.</p>
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<h2>Macro Documentation</h2>
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<h3 class="fn" id="QMediaStreamsControl_iid"><a name="QMediaStreamsControl_iid"></a><span class="name">QMediaStreamsControl_iid</span></h3>
<p><code>org.qt-project.qt.mediastreamscontrol/5.0</code></p>
<p>Defines the interface name of the <a href="qmediastreamscontrol.html">QMediaStreamsControl</a> class.</p>
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