<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qaudiosystem.cpp --> <title>QAbstractAudioOutput Class | Qt Multimedia 5.12.2</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtmultimedia-index.html">Qt Multimedia</a></td><td ><a href="qtmultimedia-modules.html">C++ Classes</a></td><td >QAbstractAudioOutput</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtmultimedia-index.html">Qt 5.12.2 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"> <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="#signals">Signals</a></li> <li class="level1"><a href="#static-public-members">Static Public Members</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">QAbstractAudioOutput Class</h1> <!-- $$$QAbstractAudioOutput-brief --> <p>The <a href="qabstractaudiooutput.html">QAbstractAudioOutput</a> class is a base class for audio backends. <a href="#details">More...</a></p> <!-- @@@QAbstractAudioOutput --> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QAbstractAudioOutput></span> </td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += multimedia</td></tr></table></div><ul> <li><a href="qabstractaudiooutput-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-functions"></a> <h2 id="public-functions">Public Functions</h2> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#bufferSize">bufferSize</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#bytesFree">bytesFree</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QString </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#category">category</a></b>() const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual qint64 </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#elapsedUSecs">elapsedUSecs</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QAudio::Error </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#error">error</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QAudioFormat </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#format">format</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#notifyInterval">notifyInterval</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#periodSize">periodSize</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual qint64 </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#processedUSecs">processedUSecs</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#reset">reset</a></b>() = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#resume">resume</a></b>() = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#setBufferSize">setBufferSize</a></b>(int <i>value</i>) = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#setCategory">setCategory</a></b>(<i>const QString &</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#setFormat">setFormat</a></b>(const QAudioFormat &<i>fmt</i>) = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#setNotifyInterval">setNotifyInterval</a></b>(int <i>milliSeconds</i>) = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#setVolume">setVolume</a></b>(<i>qreal</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#start">start</a></b>(QIODevice *<i>device</i>) = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QIODevice *</td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#start-1">start</a></b>() = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QAudio::State </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#state">state</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#stop">stop</a></b>() = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#suspend">suspend</a></b>() = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual qreal </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#volume">volume</a></b>() const</td></tr> </table></div> <a name="signals"></a> <h2 id="signals">Signals</h2> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#errorChanged">errorChanged</a></b>(QAudio::Error <i>error</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#notify">notify</a></b>()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#stateChanged">stateChanged</a></b>(QAudio::State <i>state</i>)</td></tr> </table></div> <a name="static-public-members"></a> <h2 id="static-public-members">Static Public Members</h2> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> const QMetaObject </td><td class="memItemRight bottomAlign"><b><a href="qabstractaudiooutput.html#staticMetaObject-var">staticMetaObject</a></b></td></tr> </table></div> <a name="details"></a> <!-- $$$QAbstractAudioOutput-description --> <div class="descr"> <h2 id="details">Detailed Description</h2> <p>The <a href="qabstractaudiooutput.html">QAbstractAudioOutput</a> class is a base class for audio backends.</p> <p><a href="qabstractaudiooutput.html">QAbstractAudioOutput</a> implements audio functionality for <a href="qaudiooutput.html">QAudioOutput</a>, i.e., <a href="qaudiooutput.html">QAudioOutput</a> routes function calls to <a href="qabstractaudiooutput.html">QAbstractAudioOutput</a>. For a description of the functionality that is implemented, see the <a href="qaudiooutput.html">QAudioOutput</a> class and function descriptions.</p> </div> <p><b>See also </b><a href="qaudiooutput.html">QAudioOutput</a>.</p> <!-- @@@QAbstractAudioOutput --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$bufferSize[overload1]$$$bufferSize --> <h3 class="fn" id="bufferSize"><a name="bufferSize"></a><code>[pure virtual] </code><span class="type">int</span> QAbstractAudioOutput::<span class="name">bufferSize</span>() const</h3> <p><b>See also </b><a href="qabstractaudiooutput.html#setBufferSize">setBufferSize</a>().</p> <!-- @@@bufferSize --> <!-- $$$bytesFree[overload1]$$$bytesFree --> <h3 class="fn" id="bytesFree"><a name="bytesFree"></a><code>[pure virtual] </code><span class="type">int</span> QAbstractAudioOutput::<span class="name">bytesFree</span>() const</h3> <!-- @@@bytesFree --> <!-- $$$category[overload1]$$$category --> <h3 class="fn" id="category"><a name="category"></a><code>[virtual] </code><span class="type">QString</span> QAbstractAudioOutput::<span class="name">category</span>() const</h3> <p><b>See also </b><a href="qabstractaudiooutput.html#setCategory">setCategory</a>().</p> <!-- @@@category --> <!-- $$$elapsedUSecs[overload1]$$$elapsedUSecs --> <h3 class="fn" id="elapsedUSecs"><a name="elapsedUSecs"></a><code>[pure virtual] </code><span class="type">qint64</span> QAbstractAudioOutput::<span class="name">elapsedUSecs</span>() const</h3> <!-- @@@elapsedUSecs --> <!-- $$$error[overload1]$$$error --> <h3 class="fn" id="error"><a name="error"></a><code>[pure virtual] </code><span class="type"><a href="qaudio.html#Error-enum">QAudio::Error</a></span> QAbstractAudioOutput::<span class="name">error</span>() const</h3> <!-- @@@error --> <!-- $$$errorChanged[overload1]$$$errorChangedQAudio::Error --> <h3 class="fn" id="errorChanged"><a name="errorChanged"></a><code>[signal] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">errorChanged</span>(<span class="type"><a href="qaudio.html#Error-enum">QAudio::Error</a></span> <i>error</i>)</h3> <!-- @@@errorChanged --> <!-- $$$format[overload1]$$$format --> <h3 class="fn" id="format"><a name="format"></a><code>[pure virtual] </code><span class="type"><a href="qaudioformat.html">QAudioFormat</a></span> QAbstractAudioOutput::<span class="name">format</span>() const</h3> <p><b>See also </b><a href="qabstractaudiooutput.html#setFormat">setFormat</a>().</p> <!-- @@@format --> <!-- $$$notify[overload1]$$$notify --> <h3 class="fn" id="notify"><a name="notify"></a><code>[signal] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">notify</span>()</h3> <!-- @@@notify --> <!-- $$$notifyInterval[overload1]$$$notifyInterval --> <h3 class="fn" id="notifyInterval"><a name="notifyInterval"></a><code>[pure virtual] </code><span class="type">int</span> QAbstractAudioOutput::<span class="name">notifyInterval</span>() const</h3> <p><b>See also </b><a href="qabstractaudiooutput.html#setNotifyInterval">setNotifyInterval</a>().</p> <!-- @@@notifyInterval --> <!-- $$$periodSize[overload1]$$$periodSize --> <h3 class="fn" id="periodSize"><a name="periodSize"></a><code>[pure virtual] </code><span class="type">int</span> QAbstractAudioOutput::<span class="name">periodSize</span>() const</h3> <!-- @@@periodSize --> <!-- $$$processedUSecs[overload1]$$$processedUSecs --> <h3 class="fn" id="processedUSecs"><a name="processedUSecs"></a><code>[pure virtual] </code><span class="type">qint64</span> QAbstractAudioOutput::<span class="name">processedUSecs</span>() const</h3> <!-- @@@processedUSecs --> <!-- $$$reset[overload1]$$$reset --> <h3 class="fn" id="reset"><a name="reset"></a><code>[pure virtual] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">reset</span>()</h3> <!-- @@@reset --> <!-- $$$resume[overload1]$$$resume --> <h3 class="fn" id="resume"><a name="resume"></a><code>[pure virtual] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">resume</span>()</h3> <!-- @@@resume --> <!-- $$$setBufferSize[overload1]$$$setBufferSizeint --> <h3 class="fn" id="setBufferSize"><a name="setBufferSize"></a><code>[pure virtual] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">setBufferSize</span>(<span class="type">int</span> <i>value</i>)</h3> <p><b>See also </b><a href="qabstractaudiooutput.html#bufferSize">bufferSize</a>().</p> <!-- @@@setBufferSize --> <!-- $$$setCategory[overload1]$$$setCategoryconstQString& --> <h3 class="fn" id="setCategory"><a name="setCategory"></a><code>[virtual] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">setCategory</span>(<i>const QString &</i>)</h3> <p><b>See also </b><a href="qabstractaudiooutput.html#category">category</a>().</p> <!-- @@@setCategory --> <!-- $$$setFormat[overload1]$$$setFormatconstQAudioFormat& --> <h3 class="fn" id="setFormat"><a name="setFormat"></a><code>[pure virtual] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">setFormat</span>(const <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span> &<i>fmt</i>)</h3> <p><b>See also </b><a href="qabstractaudiooutput.html#format">format</a>().</p> <!-- @@@setFormat --> <!-- $$$setNotifyInterval[overload1]$$$setNotifyIntervalint --> <h3 class="fn" id="setNotifyInterval"><a name="setNotifyInterval"></a><code>[pure virtual] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">setNotifyInterval</span>(<span class="type">int</span> <i>milliSeconds</i>)</h3> <p><b>See also </b><a href="qabstractaudiooutput.html#notifyInterval">notifyInterval</a>().</p> <!-- @@@setNotifyInterval --> <!-- $$$setVolume[overload1]$$$setVolumeqreal --> <h3 class="fn" id="setVolume"><a name="setVolume"></a><code>[virtual] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">setVolume</span>(<i>qreal</i>)</h3> <p><b>See also </b><a href="qabstractaudiooutput.html#volume">volume</a>().</p> <!-- @@@setVolume --> <!-- $$$start[overload1]$$$startQIODevice* --> <h3 class="fn" id="start"><a name="start"></a><code>[pure virtual] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">start</span>(<span class="type">QIODevice</span> *<i>device</i>)</h3> <!-- @@@start --> <!-- $$$start$$$start --> <h3 class="fn" id="start-1"><a name="start-1"></a><code>[pure virtual] </code><span class="type">QIODevice</span> *QAbstractAudioOutput::<span class="name">start</span>()</h3> <!-- @@@start --> <!-- $$$state[overload1]$$$state --> <h3 class="fn" id="state"><a name="state"></a><code>[pure virtual] </code><span class="type"><a href="qaudio.html#State-enum">QAudio::State</a></span> QAbstractAudioOutput::<span class="name">state</span>() const</h3> <!-- @@@state --> <!-- $$$stateChanged[overload1]$$$stateChangedQAudio::State --> <h3 class="fn" id="stateChanged"><a name="stateChanged"></a><code>[signal] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">stateChanged</span>(<span class="type"><a href="qaudio.html#State-enum">QAudio::State</a></span> <i>state</i>)</h3> <!-- @@@stateChanged --> <!-- $$$stop[overload1]$$$stop --> <h3 class="fn" id="stop"><a name="stop"></a><code>[pure virtual] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">stop</span>()</h3> <!-- @@@stop --> <!-- $$$suspend[overload1]$$$suspend --> <h3 class="fn" id="suspend"><a name="suspend"></a><code>[pure virtual] </code><span class="type">void</span> QAbstractAudioOutput::<span class="name">suspend</span>()</h3> <!-- @@@suspend --> <!-- $$$volume[overload1]$$$volume --> <h3 class="fn" id="volume"><a name="volume"></a><code>[virtual] </code><span class="type">qreal</span> QAbstractAudioOutput::<span class="name">volume</span>() const</h3> <p><b>See also </b><a href="qabstractaudiooutput.html#setVolume">setVolume</a>().</p> <!-- @@@volume --> </div> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. 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/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>