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<h1 class="title">audiolevels.cpp Example File</h1>
<span class="subtitle">audiolevels/audiolevels.cpp</span>
<!-- $$$audiolevels/audiolevels.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Data Visualization module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include "audiolevelsiodevice.h"</span>
<span class="preprocessor">#include "audiolevels.h"</span>
<span class="preprocessor">#include <QtDataVisualization/qbardataproxy.h></span>
<span class="preprocessor">#include <QtDataVisualization/qvalue3daxis.h></span>
<span class="preprocessor">#include <QtDataVisualization/q3dscene.h></span>
<span class="preprocessor">#include <QtDataVisualization/q3dcamera.h></span>
<span class="preprocessor">#include <QtDataVisualization/qbar3dseries.h></span>
<span class="preprocessor">#include <QtDataVisualization/q3dtheme.h></span>
<span class="preprocessor">#include <QtDataVisualization/qcustom3dlabel.h></span>
<span class="preprocessor">#include <QtMultimedia/QAudioDeviceInfo></span>
<span class="preprocessor">#include <QtMultimedia/QAudioInput></span>
<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="type"><a href="qtdatavisualization-qmlmodule.html">QtDataVisualization</a></span>;
AudioLevels<span class="operator">::</span>AudioLevels(<span class="type"><a href="q3dbars.html">Q3DBars</a></span> <span class="operator">*</span>graph<span class="operator">,</span> <span class="type">QObject</span> <span class="operator">*</span>parent)
: <span class="type">QObject</span>(parent)<span class="operator">,</span>
m_graph(graph)<span class="operator">,</span>
m_device(<span class="number">0</span>)<span class="operator">,</span>
m_audioInput(<span class="number">0</span>)
{
<span class="comment">// Set up the graph</span>
m_graph<span class="operator">-</span><span class="operator">></span>setBarThickness(<span class="number">0.5f</span>);
m_graph<span class="operator">-</span><span class="operator">></span>setBarSpacing(<span class="type">QSizeF</span>(<span class="number">0.0</span><span class="operator">,</span> <span class="number">1.0</span>));
m_graph<span class="operator">-</span><span class="operator">></span>valueAxis()<span class="operator">-</span><span class="operator">></span>setRange(<span class="operator">-</span><span class="number">100.0f</span><span class="operator">,</span> <span class="number">100.0f</span>);
m_graph<span class="operator">-</span><span class="operator">></span>valueAxis()<span class="operator">-</span><span class="operator">></span>setSegmentCount(<span class="number">20</span>);
m_graph<span class="operator">-</span><span class="operator">></span>valueAxis()<span class="operator">-</span><span class="operator">></span>setLabelFormat(<span class="type">QStringLiteral</span>(<span class="string">"%d%%"</span>));
m_graph<span class="operator">-</span><span class="operator">></span>setShadowQuality(QAbstract3DGraph<span class="operator">::</span>ShadowQualityNone);
m_graph<span class="operator">-</span><span class="operator">></span>setSelectionMode(QAbstract3DGraph<span class="operator">::</span>SelectionNone);
m_graph<span class="operator">-</span><span class="operator">></span>scene()<span class="operator">-</span><span class="operator">></span>activeCamera()<span class="operator">-</span><span class="operator">></span>setCameraPosition(<span class="operator">-</span><span class="number">25.0f</span><span class="operator">,</span> <span class="number">10.0f</span><span class="operator">,</span> <span class="number">190.0f</span>);
m_graph<span class="operator">-</span><span class="operator">></span>activeTheme()<span class="operator">-</span><span class="operator">></span>setType(<span class="type"><a href="q3dtheme.html">Q3DTheme</a></span><span class="operator">::</span>ThemeIsabelle);
m_graph<span class="operator">-</span><span class="operator">></span>activeTheme()<span class="operator">-</span><span class="operator">></span>setGridEnabled(<span class="keyword">true</span>);
m_graph<span class="operator">-</span><span class="operator">></span>activeTheme()<span class="operator">-</span><span class="operator">></span>setBackgroundEnabled(<span class="keyword">false</span>);
<span class="type">QFont</span> font <span class="operator">=</span> m_graph<span class="operator">-</span><span class="operator">></span>activeTheme()<span class="operator">-</span><span class="operator">></span>font();
font<span class="operator">.</span>setPointSize(<span class="number">10</span>);
m_graph<span class="operator">-</span><span class="operator">></span>activeTheme()<span class="operator">-</span><span class="operator">></span>setFont(font);
QBar3DSeries <span class="operator">*</span>series <span class="operator">=</span> <span class="keyword">new</span> QBar3DSeries;
series<span class="operator">-</span><span class="operator">></span>setMesh(QAbstract3DSeries<span class="operator">::</span>MeshBar);
m_graph<span class="operator">-</span><span class="operator">></span>addSeries(series);
<span class="type">QAudioDeviceInfo</span> inputDevice <span class="operator">=</span> <span class="type">QAudioDeviceInfo</span><span class="operator">::</span>defaultInputDevice();
<span class="keyword">if</span> (inputDevice<span class="operator">.</span>supportedSampleRates()<span class="operator">.</span>size() <span class="operator">></span> <span class="number">0</span>
<span class="operator">&</span><span class="operator">&</span> inputDevice<span class="operator">.</span>supportedChannelCounts()<span class="operator">.</span>size() <span class="operator">></span> <span class="number">0</span>
<span class="operator">&</span><span class="operator">&</span> inputDevice<span class="operator">.</span>supportedSampleSizes()<span class="operator">.</span>size() <span class="operator">></span> <span class="number">0</span>
<span class="operator">&</span><span class="operator">&</span> inputDevice<span class="operator">.</span>supportedCodecs()<span class="operator">.</span>size() <span class="operator">></span> <span class="number">0</span>) {
<span class="type">QAudioFormat</span> formatAudio;
formatAudio<span class="operator">.</span>setSampleRate(inputDevice<span class="operator">.</span>supportedSampleRates()<span class="operator">.</span>at(<span class="number">0</span>));
formatAudio<span class="operator">.</span>setChannelCount(inputDevice<span class="operator">.</span>supportedChannelCounts()<span class="operator">.</span>at(<span class="number">0</span>));
formatAudio<span class="operator">.</span>setSampleSize(inputDevice<span class="operator">.</span>supportedSampleSizes()<span class="operator">.</span>at(<span class="number">0</span>));
formatAudio<span class="operator">.</span>setCodec(inputDevice<span class="operator">.</span>supportedCodecs()<span class="operator">.</span>at(<span class="number">0</span>));
formatAudio<span class="operator">.</span>setByteOrder(<span class="type">QAudioFormat</span><span class="operator">::</span>LittleEndian);
formatAudio<span class="operator">.</span>setSampleType(<span class="type">QAudioFormat</span><span class="operator">::</span>UnSignedInt);
m_audioInput <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QAudioInput</span>(inputDevice<span class="operator">,</span> formatAudio<span class="operator">,</span> <span class="keyword">this</span>);
<span class="preprocessor">#ifdef Q_OS_MAC</span>
<span class="comment">// OS X seems to wait for entire buffer to fill before calling writeData, so use smaller buffer</span>
m_audioInput<span class="operator">-</span><span class="operator">></span>setBufferSize(<span class="number">256</span>);
<span class="preprocessor">#else</span>
m_audioInput<span class="operator">-</span><span class="operator">></span>setBufferSize(<span class="number">1024</span>);
<span class="preprocessor">#endif</span>
m_device <span class="operator">=</span> <span class="keyword">new</span> AudioLevelsIODevice(m_graph<span class="operator">-</span><span class="operator">></span>seriesList()<span class="operator">.</span>at(<span class="number">0</span>)<span class="operator">-</span><span class="operator">></span>dataProxy()<span class="operator">,</span> <span class="keyword">this</span>);
m_device<span class="operator">-</span><span class="operator">></span>open(<span class="type">QIODevice</span><span class="operator">::</span>WriteOnly);
m_audioInput<span class="operator">-</span><span class="operator">></span>start(m_device);
} <span class="keyword">else</span> {
<span class="comment">// No graph content can be shown, so add a custom warning label</span>
QCustom3DLabel <span class="operator">*</span>titleLabel <span class="operator">=</span> <span class="keyword">new</span> QCustom3DLabel(<span class="string">"No valid audio input device found"</span><span class="operator">,</span>
<span class="type">QFont</span>()<span class="operator">,</span>
QVector3D(<span class="number">0.2f</span><span class="operator">,</span> <span class="number">0.2f</span><span class="operator">,</span> <span class="number">0.0f</span>)<span class="operator">,</span>
QVector3D(<span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">0.0f</span>)<span class="operator">,</span>
<span class="type">QQuaternion</span>());
titleLabel<span class="operator">-</span><span class="operator">></span>setPositionAbsolute(<span class="keyword">true</span>);
titleLabel<span class="operator">-</span><span class="operator">></span>setFacingCamera(<span class="keyword">true</span>);
m_graph<span class="operator">-</span><span class="operator">></span>addCustomItem(titleLabel);
}
}
AudioLevels<span class="operator">::</span><span class="operator">~</span>AudioLevels()
{
<span class="keyword">if</span> (m_audioInput)
m_audioInput<span class="operator">-</span><span class="operator">></span>stop();
<span class="keyword">if</span> (m_device)
m_device<span class="operator">-</span><span class="operator">></span>close();
}
</pre>
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<!-- @@@audiolevels/audiolevels.cpp -->
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distrib
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Mageia
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7
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armv7hl
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media
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core-updates
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by-pkgid
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845e36bb3ecce380666d628d88446962
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204
