<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.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" /> <title>Qt 4.8: GEAudioOut.cpp Example File (demos/mobile/quickhit/ga_src/GEAudioOut.cpp)</title> <link rel="stylesheet" type="text/css" href="style/style.css" /> <script src="scripts/jquery.js" type="text/javascript"></script> <script src="scripts/functions.js" type="text/javascript"></script> <link rel="stylesheet" type="text/css" href="style/superfish.css" /> <link rel="stylesheet" type="text/css" href="style/narrow.css" /> <!--[if IE]> <meta name="MSSmartTagsPreventParsing" content="true"> <meta http-equiv="imagetoolbar" content="no"> <![endif]--> <!--[if lt IE 7]> <link rel="stylesheet" type="text/css" href="style/style_ie6.css"> <![endif]--> <!--[if IE 7]> <link rel="stylesheet" type="text/css" href="style/style_ie7.css"> <![endif]--> <!--[if IE 8]> <link rel="stylesheet" type="text/css" href="style/style_ie8.css"> <![endif]--> <script src="scripts/superfish.js" type="text/javascript"></script> <script src="scripts/narrow.js" type="text/javascript"></script> </head> <body class="" onload="CheckEmptyAndLoadList();"> <div class="header" id="qtdocheader"> <div class="content"> <div id="nav-logo"> <a href="index.html">Home</a></div> <a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a> <div id="narrowsearch"></div> <div id="nav-topright"> <ul> <li class="nav-topright-home"><a href="http://qt.digia.com/">Qt HOME</a></li> <li class="nav-topright-dev"><a href="http://qt-project.org/">DEV</a></li> <li class="nav-topright-doc nav-topright-doc-active"><a href="http://qt-project.org/doc/"> DOC</a></li> <li class="nav-topright-blog"><a href="http://blog.qt.digia.com/">BLOG</a></li> </ul> </div> <div id="shortCut"> <ul> <li class="shortCut-topleft-inactive"><span><a href="index.html">Qt 4.8</a></span></li> <li class="shortCut-topleft-active"><a href="http://qt-project.org/doc/">ALL VERSIONS </a></li> </ul> </div> <ul class="sf-menu" id="narrowmenu"> <li><a href="#">API Lookup</a> <ul> <li><a href="classes.html">Class index</a></li> <li><a href="functions.html">Function index</a></li> <li><a href="modules.html">Modules</a></li> <li><a href="namespaces.html">Namespaces</a></li> <li><a href="qtglobal.html">Global Declarations</a></li> <li><a href="qdeclarativeelements.html">QML elements</a></li> </ul> </li> <li><a href="#">Qt Topics</a> <ul> <li><a href="qt-basic-concepts.html">Programming with Qt</a></li> <li><a href="qtquick.html">Device UIs & Qt Quick</a></li> <li><a href="qt-gui-concepts.html">UI Design with Qt</a></li> <li><a href="supported-platforms.html">Supported Platforms</a></li> <li><a href="technology-apis.html">Qt and Key Technologies</a></li> <li><a href="best-practices.html">How-To's and Best Practices</a></li> </ul> </li> <li><a href="#">Examples</a> <ul> <li><a href="all-examples.html">Examples</a></li> <li><a href="tutorials.html">Tutorials</a></li> <li><a href="demos.html">Demos</a></li> <li><a href="qdeclarativeexamples.html">QML Examples</a></li> </ul> </li> </ul> </div> </div> <div class="wrapper"> <div class="hd"> <span></span> </div> <div class="bd group"> <div class="sidebar"> <div class="searchlabel"> Search index:</div> <div class="search" id="sidebarsearch"> <form id="qtdocsearch" action="" onsubmit="return false;"> <fieldset> <input type="text" name="searchstring" id="pageType" value="" /> <div id="resultdialog"> <a href="#" id="resultclose">Close</a> <p id="resultlinks" class="all"><a href="#" id="showallresults">All</a> | <a href="#" id="showapiresults">API</a> | <a href="#" id="showarticleresults">Articles</a> | <a href="#" id="showexampleresults">Examples</a></p> <p id="searchcount" class="all"><span id="resultcount"></span><span id="apicount"></span><span id="articlecount"></span><span id="examplecount"></span> results:</p> <ul id="resultlist" class="all"> </ul> </div> </fieldset> </form> </div> <div class="box first bottombar" id="lookup"> <h2 title="API Lookup"><span></span> API Lookup</h2> <div id="list001" class="list"> <ul id="ul001" > <li class="defaultLink"><a href="classes.html">Class index</a></li> <li class="defaultLink"><a href="functions.html">Function index</a></li> <li class="defaultLink"><a href="modules.html">Modules</a></li> <li class="defaultLink"><a href="namespaces.html">Namespaces</a></li> <li class="defaultLink"><a href="qtglobal.html">Global Declarations</a></li> <li class="defaultLink"><a href="qdeclarativeelements.html">QML elements</a></li> </ul> </div> </div> <div class="box bottombar" id="topics"> <h2 title="Qt Topics"><span></span> Qt Topics</h2> <div id="list002" class="list"> <ul id="ul002" > <li class="defaultLink"><a href="qt-basic-concepts.html">Programming with Qt</a></li> <li class="defaultLink"><a href="qtquick.html">Device UIs & Qt Quick</a></li> <li class="defaultLink"><a href="qt-gui-concepts.html">UI Design with Qt</a></li> <li class="defaultLink"><a href="supported-platforms.html">Supported Platforms</a></li> <li class="defaultLink"><a href="technology-apis.html">Qt and Key Technologies</a></li> <li class="defaultLink"><a href="best-practices.html">How-To's and Best Practices</a></li> </ul> </div> </div> <div class="box" id="examples"> <h2 title="Examples"><span></span> Examples</h2> <div id="list003" class="list"> <ul id="ul003"> <li class="defaultLink"><a href="all-examples.html">Examples</a></li> <li class="defaultLink"><a href="tutorials.html">Tutorials</a></li> <li class="defaultLink"><a href="demos.html">Demos</a></li> <li class="defaultLink"><a href="qdeclarativeexamples.html">QML Examples</a></li> </ul> </div> </div> </div> <div class="wrap"> <div class="toolbar"> <div class="breadcrumb toolblock"> <ul> <li class="first"><a href="index.html">Home</a></li> <!-- Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">GEAudioOut.cpp Example File</h1> <span class="small-subtitle">demos/mobile/quickhit/ga_src/GEAudioOut.cpp</span> <!-- $$$demos/mobile/quickhit/ga_src/GEAudioOut.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the QtDeclarative module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names ** of its contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QtCore/qstring.h></span> <span class="preprocessor">#include <QAudioOutput></span> <span class="preprocessor">#include "GEAudioOut.h"</span> <span class="keyword">using</span> <span class="keyword">namespace</span> GE; <span class="comment">//using namespace QTM_NAMESPACE;</span> <span class="comment">/* #ifndef Q_OS_WIN32 QTM_USE_NAMESPACE #endif */</span> <span class="keyword">const</span> <span class="type">int</span> CHANNELS <span class="operator">=</span> <span class="number">2</span>; <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> CODEC <span class="operator">=</span> <span class="string">"audio/pcm"</span>; <span class="keyword">const</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>Endian BYTEORDER <span class="operator">=</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>LittleEndian; <span class="keyword">const</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>SampleType SAMTYPE <span class="operator">=</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>SignedInt; AudioOut<span class="operator">::</span>AudioOut( <span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent<span class="operator">,</span> GE<span class="operator">::</span>IAudioSource <span class="operator">*</span>source ) : <span class="type"><a href="qthread.html">QThread</a></span>(parent) { <span class="comment">// qobject</span> m_source <span class="operator">=</span> source; <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span> format; format<span class="operator">.</span>setFrequency(AUDIO_FREQUENCY); format<span class="operator">.</span>setChannels(CHANNELS); format<span class="operator">.</span>setSampleSize(AUDIO_SAMPLE_BITS); format<span class="operator">.</span>setCodec(CODEC); format<span class="operator">.</span>setByteOrder(BYTEORDER); format<span class="operator">.</span>setSampleType(SAMTYPE); <span class="type"><a href="qaudiodeviceinfo.html">QAudioDeviceInfo</a></span> info(<span class="type"><a href="qaudiodeviceinfo.html">QAudioDeviceInfo</a></span><span class="operator">::</span>defaultOutputDevice()); <span class="keyword">if</span> (<span class="operator">!</span>info<span class="operator">.</span>isFormatSupported(format)) format <span class="operator">=</span> info<span class="operator">.</span>nearestFormat(format); m_audioOutput <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaudiooutput.html">QAudioOutput</a></span>(info<span class="operator">,</span>format); <span class="preprocessor">#ifdef Q_WS_MAEMO_5</span> m_audioOutput<span class="operator">-</span><span class="operator">></span>setBufferSize(<span class="number">20000</span>); m_sendBufferSize <span class="operator">=</span> <span class="number">5000</span>; <span class="preprocessor">#else</span> m_audioOutput<span class="operator">-</span><span class="operator">></span>setBufferSize(<span class="number">16000</span>); m_sendBufferSize <span class="operator">=</span> <span class="number">4000</span>; <span class="preprocessor">#endif</span> m_outTarget <span class="operator">=</span> m_audioOutput<span class="operator">-</span><span class="operator">></span>start(); m_sendBuffer <span class="operator">=</span> <span class="keyword">new</span> AUDIO_SAMPLE_TYPE<span class="operator">[</span> m_sendBufferSize <span class="operator">]</span>; m_samplesMixed <span class="operator">=</span> <span class="number">0</span>; m_runstate<span class="operator">=</span><span class="number">0</span>; <span class="preprocessor">#ifndef Q_OS_SYMBIAN</span> start(); <span class="preprocessor">#else</span> m_audioOutput<span class="operator">-</span><span class="operator">></span>setNotifyInterval(<span class="number">5</span>); connect(m_audioOutput<span class="operator">,</span>SIGNAL(notify())<span class="operator">,</span>SLOT(audioNotify())); <span class="preprocessor">#endif</span> }; AudioOut<span class="operator">::</span><span class="operator">~</span>AudioOut() { <span class="keyword">if</span> (m_runstate<span class="operator">=</span><span class="operator">=</span><span class="number">0</span>) m_runstate <span class="operator">=</span> <span class="number">1</span>; <span class="keyword">if</span> (<span class="type"><a href="qthread.html">QThread</a></span><span class="operator">::</span>isRunning() <span class="operator">=</span><span class="operator">=</span> <span class="keyword">false</span>) m_runstate <span class="operator">=</span> <span class="number">2</span>; <span class="keyword">while</span> (m_runstate<span class="operator">!</span><span class="operator">=</span><span class="number">2</span>) { msleep(<span class="number">50</span>); } <span class="comment">// wait until the thread is finished</span> m_audioOutput<span class="operator">-</span><span class="operator">></span>stop(); <span class="keyword">delete</span> m_audioOutput; <span class="keyword">delete</span> <span class="operator">[</span><span class="operator">]</span> m_sendBuffer; }; <span class="type">void</span> AudioOut<span class="operator">::</span>audioNotify() { tick(); }; <span class="type">void</span> AudioOut<span class="operator">::</span>tick() { <span class="comment">// fill data to buffer as much as free space is available..</span> <span class="type">int</span> samplesToWrite <span class="operator">=</span> m_audioOutput<span class="operator">-</span><span class="operator">></span>bytesFree() <span class="operator">/</span> (CHANNELS<span class="operator">*</span>AUDIO_SAMPLE_BITS<span class="operator">/</span><span class="number">8</span>); samplesToWrite<span class="operator">*</span><span class="operator">=</span><span class="number">2</span>; <span class="keyword">if</span> (samplesToWrite <span class="operator">></span> m_sendBufferSize) samplesToWrite <span class="operator">=</span> m_sendBufferSize; <span class="keyword">if</span> (samplesToWrite<span class="operator"><</span><span class="operator">=</span><span class="number">0</span>) <span class="keyword">return</span>; <span class="type">int</span> mixedSamples <span class="operator">=</span> m_source<span class="operator">-</span><span class="operator">></span>pullAudio( m_sendBuffer<span class="operator">,</span> samplesToWrite ); m_outTarget<span class="operator">-</span><span class="operator">></span>write( (<span class="type">char</span><span class="operator">*</span>)m_sendBuffer<span class="operator">,</span> mixedSamples<span class="operator">*</span><span class="number">2</span> ); }; <span class="type">void</span> AudioOut<span class="operator">::</span>run() { <span class="keyword">if</span> (<span class="operator">!</span>m_source) { m_runstate<span class="operator">=</span><span class="number">2</span>; <span class="keyword">return</span>; } <span class="type">int</span> sleepTime <span class="operator">=</span> m_sendBufferSize <span class="operator">*</span> <span class="number">340</span> <span class="operator">/</span> AUDIO_FREQUENCY; <span class="keyword">if</span> (sleepTime<span class="operator"><</span><span class="number">2</span>) sleepTime <span class="operator">=</span> <span class="number">2</span>; <span class="keyword">while</span> (m_runstate<span class="operator">=</span><span class="operator">=</span><span class="number">0</span>) { tick(); msleep(sleepTime); }; m_runstate <span class="operator">=</span> <span class="number">2</span>; };</pre> </div> <!-- @@@demos/mobile/quickhit/ga_src/GEAudioOut.cpp --> </div> </div> </div> <div class="ft"> <span></span> </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.</p> <br /> <p> 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.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> 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. <a title="Privacy Policy" href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p> </div> <script src="scripts/functions.js" type="text/javascript"></script> </body> </html>