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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 >QMediaGaplessPlaybackControl</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<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">QMediaGaplessPlaybackControl Class</h1>
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<p>The <a href="qmediagaplessplaybackcontrol.html">QMediaGaplessPlaybackControl</a> class provides access to the gapless playback related control of a <a href="qmediaservice.html">QMediaService</a>. <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 <QMediaGaplessPlaybackControl></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="qmediagaplessplaybackcontrol-members.html">List of all members, including inherited members</a></li>
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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="qmediagaplessplaybackcontrol.html#dtor.QMediaGaplessPlaybackControl">~QMediaGaplessPlaybackControl</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual qreal </td><td class="memItemRight bottomAlign"><b><a href="qmediagaplessplaybackcontrol.html#crossfadeTime">crossfadeTime</a></b>() const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qmediagaplessplaybackcontrol.html#isCrossfadeSupported">isCrossfadeSupported</a></b>() const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QMediaContent </td><td class="memItemRight bottomAlign"><b><a href="qmediagaplessplaybackcontrol.html#nextMedia">nextMedia</a></b>() const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmediagaplessplaybackcontrol.html#setCrossfadeTime">setCrossfadeTime</a></b>(qreal <i>crossfadeTime</i>) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmediagaplessplaybackcontrol.html#setNextMedia">setNextMedia</a></b>(const QMediaContent &<i>media</i>) = 0</td></tr>
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<h2 id="signals">Signals</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmediagaplessplaybackcontrol.html#advancedToNextMedia">advancedToNextMedia</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmediagaplessplaybackcontrol.html#crossfadeTimeChanged">crossfadeTimeChanged</a></b>(qreal <i>crossfadeTime</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmediagaplessplaybackcontrol.html#nextMediaChanged">nextMediaChanged</a></b>(const QMediaContent &<i>media</i>)</td></tr>
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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="qmediagaplessplaybackcontrol.html#QMediaGaplessPlaybackControl">QMediaGaplessPlaybackControl</a></b>(QObject *<i>parent</i> = Q_NULLPTR)</td></tr>
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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="qmediagaplessplaybackcontrol.html#QMediaGaplessPlaybackControl_iid">QMediaGaplessPlaybackControl_iid</a></b></td></tr>
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<h2 id="details">Detailed Description</h2>
<p>The <a href="qmediagaplessplaybackcontrol.html">QMediaGaplessPlaybackControl</a> class provides access to the gapless playback related control of a <a href="qmediaservice.html">QMediaService</a>.</p>
<p>If a <a href="qmediaservice.html">QMediaService</a> supports gapless playback it will implement <a href="qmediagaplessplaybackcontrol.html">QMediaGaplessPlaybackControl</a>. This control provides a means to set the <a href="qmediagaplessplaybackcontrol.html#setNextMedia">next media</a> or <a href="qmediagaplessplaybackcontrol.html#setCrossfadeTime">crossfade time</a> for smooth transitions between tracks.</p>
<p>The functionality provided by this control is exposed to application code through the <a href="qmediaplayer.html">QMediaPlayer</a> class.</p>
<p>The interface name of <a href="qmediagaplessplaybackcontrol.html">QMediaGaplessPlaybackControl</a> is <code>org.qt-project.qt.mediagaplessplaybackcontrol/5.0</code> as defined in <a href="qmediagaplessplaybackcontrol.html#QMediaGaplessPlaybackControl_iid">QMediaGaplessPlaybackControl_iid</a>.</p>
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<p><b>See also </b><a href="qmediaservice.html#requestControl-1">QMediaService::requestControl</a>() and <a href="qmediaplayer.html">QMediaPlayer</a>.</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="QMediaGaplessPlaybackControl"><a name="QMediaGaplessPlaybackControl"></a><code>[protected] </code>QMediaGaplessPlaybackControl::<span class="name">QMediaGaplessPlaybackControl</span>(<span class="type">QObject</span> *<i>parent</i> = Q_NULLPTR)</h3>
<p>Constructs a new gapless playback control with the given <i>parent</i>.</p>
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<h3 class="fn" id="dtor.QMediaGaplessPlaybackControl"><a name="dtor.QMediaGaplessPlaybackControl"></a><code>[virtual] </code>QMediaGaplessPlaybackControl::<span class="name">~QMediaGaplessPlaybackControl</span>()</h3>
<p>Destroys a gapless playback control.</p>
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<h3 class="fn" id="advancedToNextMedia"><a name="advancedToNextMedia"></a><code>[signal] </code><span class="type">void</span> QMediaGaplessPlaybackControl::<span class="name">advancedToNextMedia</span>()</h3>
<p>Signals when the player advances to the next media (the content of next media will be cleared).</p>
<p><b>See also </b><a href="qmediagaplessplaybackcontrol.html#nextMedia">nextMedia</a>().</p>
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<h3 class="fn" id="crossfadeTime"><a name="crossfadeTime"></a><code>[pure virtual] </code><span class="type">qreal</span> QMediaGaplessPlaybackControl::<span class="name">crossfadeTime</span>() const</h3>
<p>Returns current crossfade time in seconds.</p>
<p><b>See also </b><a href="qmediagaplessplaybackcontrol.html#setCrossfadeTime">setCrossfadeTime</a>().</p>
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<h3 class="fn" id="crossfadeTimeChanged"><a name="crossfadeTimeChanged"></a><code>[signal] </code><span class="type">void</span> QMediaGaplessPlaybackControl::<span class="name">crossfadeTimeChanged</span>(<span class="type">qreal</span> <i>crossfadeTime</i>)</h3>
<p>Signals that the <i>crossfadeTime</i> has changed.</p>
<p><b>See also </b><a href="qmediagaplessplaybackcontrol.html#crossfadeTime">crossfadeTime</a>().</p>
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<h3 class="fn" id="isCrossfadeSupported"><a name="isCrossfadeSupported"></a><code>[pure virtual] </code><span class="type">bool</span> QMediaGaplessPlaybackControl::<span class="name">isCrossfadeSupported</span>() const</h3>
<p>Indicates whether crossfading is supported or not. If crossfading is not supported, <a href="qmediagaplessplaybackcontrol.html#setCrossfadeTime">setCrossfadeTime</a>() will be ignored and <a href="qmediagaplessplaybackcontrol.html#crossfadeTime">crossfadeTime</a>() will always return 0.</p>
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<h3 class="fn" id="nextMedia"><a name="nextMedia"></a><code>[pure virtual] </code><span class="type"><a href="qmediacontent.html">QMediaContent</a></span> QMediaGaplessPlaybackControl::<span class="name">nextMedia</span>() const</h3>
<p>Returns the content of the next media</p>
<p><b>See also </b><a href="qmediagaplessplaybackcontrol.html#setNextMedia">setNextMedia</a>().</p>
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<h3 class="fn" id="nextMediaChanged"><a name="nextMediaChanged"></a><code>[signal] </code><span class="type">void</span> QMediaGaplessPlaybackControl::<span class="name">nextMediaChanged</span>(const <span class="type"><a href="qmediacontent.html">QMediaContent</a></span> &<i>media</i>)</h3>
<p>Signals that the next <i>media</i> has changed (either explicitly via <a href="qmediagaplessplaybackcontrol.html#setNextMedia">setNextMedia</a>() or when the player clears the next media while advancing to it).</p>
<p><b>See also </b><a href="qmediagaplessplaybackcontrol.html#nextMedia">nextMedia</a>().</p>
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<h3 class="fn" id="setCrossfadeTime"><a name="setCrossfadeTime"></a><code>[pure virtual] </code><span class="type">void</span> QMediaGaplessPlaybackControl::<span class="name">setCrossfadeTime</span>(<span class="type">qreal</span> <i>crossfadeTime</i>)</h3>
<p>Sets the <i>crossfadeTime</i> in seconds for smooth transition.</p>
<p>Positive value means how much time it will take for the next media to transit from silent to full volume and vice versa for current one. So both current and the next one will be playing during this period of time.</p>
<p>A crossfade time of zero or negative will result in gapless playback (suitable for some continuous media).</p>
<p><b>See also </b><a href="qmediagaplessplaybackcontrol.html#crossfadeTime">crossfadeTime</a>().</p>
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<h3 class="fn" id="setNextMedia"><a name="setNextMedia"></a><code>[pure virtual] </code><span class="type">void</span> QMediaGaplessPlaybackControl::<span class="name">setNextMedia</span>(const <span class="type"><a href="qmediacontent.html">QMediaContent</a></span> &<i>media</i>)</h3>
<p>Sets the next <i>media</i> for smooth transition.</p>
<p><b>See also </b><a href="qmediagaplessplaybackcontrol.html#nextMedia">nextMedia</a>().</p>
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<h2>Macro Documentation</h2>
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<h3 class="fn" id="QMediaGaplessPlaybackControl_iid"><a name="QMediaGaplessPlaybackControl_iid"></a><span class="name">QMediaGaplessPlaybackControl_iid</span></h3>
<p><code>org.qt-project.qt.mediagaplessplaybackcontrol/5.0</code></p>
<p>Defines the interface name of the <a href="qmediagaplessplaybackcontrol.html">QMediaGaplessPlaybackControl</a> class.</p>
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