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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">audioinput.cpp Example File</h1> <span class="small-subtitle">multimedia/audioinput/audioinput.cpp</span> <!-- $$$multimedia/audioinput/audioinput.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 examples 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 <stdlib.h></span> <span class="preprocessor">#include <math.h></span> <span class="preprocessor">#include <QDebug></span> <span class="preprocessor">#include <QPainter></span> <span class="preprocessor">#include <QVBoxLayout></span> <span class="preprocessor">#include <QAudioDeviceInfo></span> <span class="preprocessor">#include <QAudioInput></span> <span class="preprocessor">#include <QtCore/qendian.h></span> <span class="preprocessor">#include "audioinput.h"</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> InputTest<span class="operator">::</span>PushModeLabel(tr(<span class="string">"Enable push mode"</span>)); <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> InputTest<span class="operator">::</span>PullModeLabel(tr(<span class="string">"Enable pull mode"</span>)); <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> InputTest<span class="operator">::</span>SuspendLabel(tr(<span class="string">"Suspend recording"</span>)); <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> InputTest<span class="operator">::</span>ResumeLabel(tr(<span class="string">"Resume recording"</span>)); <span class="keyword">const</span> <span class="type">int</span> BufferSize <span class="operator">=</span> <span class="number">4096</span>; AudioInfo<span class="operator">::</span>AudioInfo(<span class="keyword">const</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span> <span class="operator">&</span>format<span class="operator">,</span> <span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qiodevice.html">QIODevice</a></span>(parent) <span class="operator">,</span> m_format(format) <span class="operator">,</span> m_maxAmplitude(<span class="number">0</span>) <span class="operator">,</span> m_level(<span class="number">0.0</span>) { <span class="keyword">switch</span> (m_format<span class="operator">.</span>sampleSize()) { <span class="keyword">case</span> <span class="number">8</span>: <span class="keyword">switch</span> (m_format<span class="operator">.</span>sampleType()) { <span class="keyword">case</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>UnSignedInt: m_maxAmplitude <span class="operator">=</span> <span class="number">255</span>; <span class="keyword">break</span>; <span class="keyword">case</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>SignedInt: m_maxAmplitude <span class="operator">=</span> <span class="number">127</span>; <span class="keyword">break</span>; <span class="keyword">default</span>: <span class="keyword">break</span>; } <span class="keyword">break</span>; <span class="keyword">case</span> <span class="number">16</span>: <span class="keyword">switch</span> (m_format<span class="operator">.</span>sampleType()) { <span class="keyword">case</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>UnSignedInt: m_maxAmplitude <span class="operator">=</span> <span class="number">65535</span>; <span class="keyword">break</span>; <span class="keyword">case</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>SignedInt: m_maxAmplitude <span class="operator">=</span> <span class="number">32767</span>; <span class="keyword">break</span>; <span class="keyword">default</span>: <span class="keyword">break</span>; } <span class="keyword">break</span>; <span class="keyword">default</span>: <span class="keyword">break</span>; } } AudioInfo<span class="operator">::</span><span class="operator">~</span>AudioInfo() { } <span class="type">void</span> AudioInfo<span class="operator">::</span>start() { open(<span class="type"><a href="qiodevice.html">QIODevice</a></span><span class="operator">::</span>WriteOnly); } <span class="type">void</span> AudioInfo<span class="operator">::</span>stop() { close(); } <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> AudioInfo<span class="operator">::</span>readData(<span class="type">char</span> <span class="operator">*</span>data<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> maxlen) { Q_UNUSED(data) Q_UNUSED(maxlen) <span class="keyword">return</span> <span class="number">0</span>; } <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> AudioInfo<span class="operator">::</span>writeData(<span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>data<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> len) { <span class="keyword">if</span> (m_maxAmplitude) { Q_ASSERT(m_format<span class="operator">.</span>sampleSize() <span class="operator">%</span> <span class="number">8</span> <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>); <span class="keyword">const</span> <span class="type">int</span> channelBytes <span class="operator">=</span> m_format<span class="operator">.</span>sampleSize() <span class="operator">/</span> <span class="number">8</span>; <span class="keyword">const</span> <span class="type">int</span> sampleBytes <span class="operator">=</span> m_format<span class="operator">.</span>channels() <span class="operator">*</span> channelBytes; Q_ASSERT(len <span class="operator">%</span> sampleBytes <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>); <span class="keyword">const</span> <span class="type">int</span> numSamples <span class="operator">=</span> len <span class="operator">/</span> sampleBytes; <span class="type"><a href="qtglobal.html#quint16-typedef">quint16</a></span> maxValue <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">const</span> <span class="type">unsigned</span> <span class="type">char</span> <span class="operator">*</span>ptr <span class="operator">=</span> <span class="keyword">reinterpret_cast</span><span class="operator"><</span><span class="keyword">const</span> <span class="type">unsigned</span> <span class="type">char</span> <span class="operator">*</span><span class="operator">></span>(data); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> numSamples; <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">for</span>(<span class="type">int</span> j <span class="operator">=</span> <span class="number">0</span>; j <span class="operator"><</span> m_format<span class="operator">.</span>channels(); <span class="operator">+</span><span class="operator">+</span>j) { <span class="type"><a href="qtglobal.html#quint16-typedef">quint16</a></span> value <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">if</span> (m_format<span class="operator">.</span>sampleSize() <span class="operator">=</span><span class="operator">=</span> <span class="number">8</span> <span class="operator">&</span><span class="operator">&</span> m_format<span class="operator">.</span>sampleType() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>UnSignedInt) { value <span class="operator">=</span> <span class="operator">*</span><span class="keyword">reinterpret_cast</span><span class="operator"><</span><span class="keyword">const</span> <span class="type"><a href="qtglobal.html#quint8-typedef">quint8</a></span><span class="operator">*</span><span class="operator">></span>(ptr); } <span class="keyword">else</span> <span class="keyword">if</span> (m_format<span class="operator">.</span>sampleSize() <span class="operator">=</span><span class="operator">=</span> <span class="number">8</span> <span class="operator">&</span><span class="operator">&</span> m_format<span class="operator">.</span>sampleType() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>SignedInt) { value <span class="operator">=</span> <a href="qtglobal.html#qAbs">qAbs</a>(<span class="operator">*</span><span class="keyword">reinterpret_cast</span><span class="operator"><</span><span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qint8-typedef">qint8</a></span><span class="operator">*</span><span class="operator">></span>(ptr)); } <span class="keyword">else</span> <span class="keyword">if</span> (m_format<span class="operator">.</span>sampleSize() <span class="operator">=</span><span class="operator">=</span> <span class="number">16</span> <span class="operator">&</span><span class="operator">&</span> m_format<span class="operator">.</span>sampleType() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>UnSignedInt) { <span class="keyword">if</span> (m_format<span class="operator">.</span>byteOrder() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>LittleEndian) value <span class="operator">=</span> <a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a><span class="operator"><</span><span class="type"><a href="qtglobal.html#quint16-typedef">quint16</a></span><span class="operator">></span>(ptr); <span class="keyword">else</span> value <span class="operator">=</span> <a href="qtendian.html#qFromBigEndian">qFromBigEndian</a><span class="operator"><</span><span class="type"><a href="qtglobal.html#quint16-typedef">quint16</a></span><span class="operator">></span>(ptr); } <span class="keyword">else</span> <span class="keyword">if</span> (m_format<span class="operator">.</span>sampleSize() <span class="operator">=</span><span class="operator">=</span> <span class="number">16</span> <span class="operator">&</span><span class="operator">&</span> m_format<span class="operator">.</span>sampleType() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>SignedInt) { <span class="keyword">if</span> (m_format<span class="operator">.</span>byteOrder() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>LittleEndian) value <span class="operator">=</span> <a href="qtglobal.html#qAbs">qAbs</a>(<a href="qtendian.html#qFromLittleEndian">qFromLittleEndian</a><span class="operator"><</span><span class="type"><a href="qtglobal.html#qint16-typedef">qint16</a></span><span class="operator">></span>(ptr)); <span class="keyword">else</span> value <span class="operator">=</span> <a href="qtglobal.html#qAbs">qAbs</a>(<a href="qtendian.html#qFromBigEndian">qFromBigEndian</a><span class="operator"><</span><span class="type"><a href="qtglobal.html#qint16-typedef">qint16</a></span><span class="operator">></span>(ptr)); } maxValue <span class="operator">=</span> <a href="qtglobal.html#qMax">qMax</a>(value<span class="operator">,</span> maxValue); ptr <span class="operator">+</span><span class="operator">=</span> channelBytes; } } maxValue <span class="operator">=</span> <a href="qtglobal.html#qMin">qMin</a>(maxValue<span class="operator">,</span> m_maxAmplitude); m_level <span class="operator">=</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(maxValue) <span class="operator">/</span> m_maxAmplitude; } <span class="keyword">emit</span> update(); <span class="keyword">return</span> len; } RenderArea<span class="operator">::</span>RenderArea(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent) { setBackgroundRole(<span class="type"><a href="qpalette.html">QPalette</a></span><span class="operator">::</span>Base); setAutoFillBackground(<span class="keyword">true</span>); m_level <span class="operator">=</span> <span class="number">0</span>; setMinimumHeight(<span class="number">30</span>); setMinimumWidth(<span class="number">200</span>); } <span class="type">void</span> RenderArea<span class="operator">::</span>paintEvent(<span class="type"><a href="qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span> <span class="comment">/* event */</span>) { <span class="type"><a href="qpainter.html">QPainter</a></span> painter(<span class="keyword">this</span>); painter<span class="operator">.</span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black); painter<span class="operator">.</span>drawRect(<span class="type"><a href="qrect.html">QRect</a></span>(painter<span class="operator">.</span>viewport()<span class="operator">.</span>left()<span class="operator">+</span><span class="number">10</span><span class="operator">,</span> painter<span class="operator">.</span>viewport()<span class="operator">.</span>top()<span class="operator">+</span><span class="number">10</span><span class="operator">,</span> painter<span class="operator">.</span>viewport()<span class="operator">.</span>right()<span class="operator">-</span><span class="number">20</span><span class="operator">,</span> painter<span class="operator">.</span>viewport()<span class="operator">.</span>bottom()<span class="operator">-</span><span class="number">20</span>)); <span class="keyword">if</span> (m_level <span class="operator">=</span><span class="operator">=</span> <span class="number">0.0</span>) <span class="keyword">return</span>; painter<span class="operator">.</span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>red); <span class="type">int</span> pos <span class="operator">=</span> ((painter<span class="operator">.</span>viewport()<span class="operator">.</span>right()<span class="operator">-</span><span class="number">20</span>)<span class="operator">-</span>(painter<span class="operator">.</span>viewport()<span class="operator">.</span>left()<span class="operator">+</span><span class="number">11</span>))<span class="operator">*</span>m_level; <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> <span class="number">10</span>; <span class="operator">+</span><span class="operator">+</span>i) { <span class="type">int</span> x1 <span class="operator">=</span> painter<span class="operator">.</span>viewport()<span class="operator">.</span>left()<span class="operator">+</span><span class="number">11</span>; <span class="type">int</span> y1 <span class="operator">=</span> painter<span class="operator">.</span>viewport()<span class="operator">.</span>top()<span class="operator">+</span><span class="number">10</span><span class="operator">+</span>i; <span class="type">int</span> x2 <span class="operator">=</span> painter<span class="operator">.</span>viewport()<span class="operator">.</span>left()<span class="operator">+</span><span class="number">20</span><span class="operator">+</span>pos; <span class="type">int</span> y2 <span class="operator">=</span> painter<span class="operator">.</span>viewport()<span class="operator">.</span>top()<span class="operator">+</span><span class="number">10</span><span class="operator">+</span>i; <span class="keyword">if</span> (x2 <span class="operator"><</span> painter<span class="operator">.</span>viewport()<span class="operator">.</span>left()<span class="operator">+</span><span class="number">10</span>) x2 <span class="operator">=</span> painter<span class="operator">.</span>viewport()<span class="operator">.</span>left()<span class="operator">+</span><span class="number">10</span>; painter<span class="operator">.</span>drawLine(<span class="type"><a href="qpoint.html">QPoint</a></span>(x1<span class="operator">,</span> y1)<span class="operator">,</span><span class="type"><a href="qpoint.html">QPoint</a></span>(x2<span class="operator">,</span> y2)); } } <span class="type">void</span> RenderArea<span class="operator">::</span>setLevel(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> value) { m_level <span class="operator">=</span> value; repaint(); } InputTest<span class="operator">::</span>InputTest() : m_canvas(<span class="number">0</span>) <span class="operator">,</span> m_modeButton(<span class="number">0</span>) <span class="operator">,</span> m_suspendResumeButton(<span class="number">0</span>) <span class="operator">,</span> m_deviceBox(<span class="number">0</span>) <span class="operator">,</span> m_device(<span class="type"><a href="qaudiodeviceinfo.html">QAudioDeviceInfo</a></span><span class="operator">::</span>defaultInputDevice()) <span class="operator">,</span> m_audioInfo(<span class="number">0</span>) <span class="operator">,</span> m_audioInput(<span class="number">0</span>) <span class="operator">,</span> m_input(<span class="number">0</span>) <span class="operator">,</span> m_pullMode(<span class="keyword">false</span>) <span class="operator">,</span> m_buffer(BufferSize<span class="operator">,</span> <span class="number">0</span>) { initializeWindow(); initializeAudio(); } InputTest<span class="operator">::</span><span class="operator">~</span>InputTest() {} <span class="type">void</span> InputTest<span class="operator">::</span>initializeWindow() { <span class="type"><a href="qscopedpointer.html">QScopedPointer</a></span><span class="operator"><</span><span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">></span> window(<span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>); <span class="type"><a href="qscopedpointer.html">QScopedPointer</a></span><span class="operator"><</span><span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span><span class="operator">></span> layout(<span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>); m_canvas <span class="operator">=</span> <span class="keyword">new</span> RenderArea(<span class="keyword">this</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(m_canvas); m_deviceBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcombobox.html">QComboBox</a></span>(<span class="keyword">this</span>); <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qaudiodeviceinfo.html">QAudioDeviceInfo</a></span><span class="operator">></span> devices <span class="operator">=</span> <span class="type"><a href="qaudiodeviceinfo.html">QAudioDeviceInfo</a></span><span class="operator">::</span>availableDevices(<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>AudioInput); <span class="keyword">for</span>(<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> devices<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) m_deviceBox<span class="operator">-</span><span class="operator">></span>addItem(devices<span class="operator">.</span>at(i)<span class="operator">.</span>deviceName()<span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(devices<span class="operator">.</span>at(i))); connect(m_deviceBox<span class="operator">,</span> SIGNAL(activated(<span class="type">int</span>))<span class="operator">,</span> SLOT(deviceChanged(<span class="type">int</span>))); layout<span class="operator">-</span><span class="operator">></span>addWidget(m_deviceBox); m_modeButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(<span class="keyword">this</span>); m_modeButton<span class="operator">-</span><span class="operator">></span>setText(PushModeLabel); connect(m_modeButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> SLOT(toggleMode())); layout<span class="operator">-</span><span class="operator">></span>addWidget(m_modeButton); m_suspendResumeButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(<span class="keyword">this</span>); m_suspendResumeButton<span class="operator">-</span><span class="operator">></span>setText(SuspendLabel); connect(m_suspendResumeButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> SLOT(toggleSuspend())); layout<span class="operator">-</span><span class="operator">></span>addWidget(m_suspendResumeButton); window<span class="operator">-</span><span class="operator">></span>setLayout(layout<span class="operator">.</span>data()); layout<span class="operator">.</span>take(); <span class="comment">// ownership transferred</span> setCentralWidget(window<span class="operator">.</span>data()); <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span><span class="keyword">const</span> windowPtr <span class="operator">=</span> window<span class="operator">.</span>take(); <span class="comment">// ownership transferred</span> windowPtr<span class="operator">-</span><span class="operator">></span>show(); } <span class="type">void</span> InputTest<span class="operator">::</span>initializeAudio() { m_pullMode <span class="operator">=</span> <span class="keyword">true</span>; m_format<span class="operator">.</span>setFrequency(<span class="number">8000</span>); m_format<span class="operator">.</span>setChannels(<span class="number">1</span>); m_format<span class="operator">.</span>setSampleSize(<span class="number">16</span>); m_format<span class="operator">.</span>setSampleType(<span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>SignedInt); m_format<span class="operator">.</span>setByteOrder(<span class="type"><a href="qaudioformat.html">QAudioFormat</a></span><span class="operator">::</span>LittleEndian); m_format<span class="operator">.</span>setCodec(<span class="string">"audio/pcm"</span>); <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>defaultInputDevice()); <span class="keyword">if</span> (<span class="operator">!</span>info<span class="operator">.</span>isFormatSupported(m_format)) { <a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"Default format not supported - trying to use nearest"</span>; m_format <span class="operator">=</span> info<span class="operator">.</span>nearestFormat(m_format); } m_audioInfo <span class="operator">=</span> <span class="keyword">new</span> AudioInfo(m_format<span class="operator">,</span> <span class="keyword">this</span>); connect(m_audioInfo<span class="operator">,</span> SIGNAL(update())<span class="operator">,</span> SLOT(refreshDisplay())); createAudioInput(); } <span class="type">void</span> InputTest<span class="operator">::</span>createAudioInput() { m_audioInput <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaudioinput.html">QAudioInput</a></span>(m_device<span class="operator">,</span> m_format<span class="operator">,</span> <span class="keyword">this</span>); connect(m_audioInput<span class="operator">,</span> SIGNAL(notify())<span class="operator">,</span> SLOT(notified())); connect(m_audioInput<span class="operator">,</span> SIGNAL(stateChanged(<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>State))<span class="operator">,</span> SLOT(stateChanged(<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>State))); m_audioInfo<span class="operator">-</span><span class="operator">></span>start(); m_audioInput<span class="operator">-</span><span class="operator">></span>start(m_audioInfo); } <span class="type">void</span> InputTest<span class="operator">::</span>notified() { <a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"bytesReady = "</span> <span class="operator"><</span><span class="operator"><</span> m_audioInput<span class="operator">-</span><span class="operator">></span>bytesReady() <span class="operator"><</span><span class="operator"><</span> <span class="string">", "</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"elapsedUSecs = "</span> <span class="operator"><</span><span class="operator"><</span>m_audioInput<span class="operator">-</span><span class="operator">></span>elapsedUSecs() <span class="operator"><</span><span class="operator"><</span> <span class="string">", "</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"processedUSecs = "</span><span class="operator"><</span><span class="operator"><</span>m_audioInput<span class="operator">-</span><span class="operator">></span>processedUSecs(); } <span class="type">void</span> InputTest<span class="operator">::</span>readMore() { <span class="keyword">if</span>(<span class="operator">!</span>m_audioInput) <span class="keyword">return</span>; <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> len <span class="operator">=</span> m_audioInput<span class="operator">-</span><span class="operator">></span>bytesReady(); <span class="keyword">if</span>(len <span class="operator">></span> <span class="number">4096</span>) len <span class="operator">=</span> <span class="number">4096</span>; <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> l <span class="operator">=</span> m_input<span class="operator">-</span><span class="operator">></span>read(m_buffer<span class="operator">.</span>data()<span class="operator">,</span> len); <span class="keyword">if</span>(l <span class="operator">></span> <span class="number">0</span>) { m_audioInfo<span class="operator">-</span><span class="operator">></span>write(m_buffer<span class="operator">.</span>constData()<span class="operator">,</span> l); } } <span class="type">void</span> InputTest<span class="operator">::</span>toggleMode() { <span class="comment">// Change bewteen pull and push modes</span> <span class="keyword">if</span> (m_input <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>) { disconnect(m_input<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="number">0</span>); m_input <span class="operator">=</span> <span class="number">0</span>; } m_audioInput<span class="operator">-</span><span class="operator">></span>stop(); <span class="keyword">if</span> (m_pullMode) { m_modeButton<span class="operator">-</span><span class="operator">></span>setText(PullModeLabel); m_input <span class="operator">=</span> m_audioInput<span class="operator">-</span><span class="operator">></span>start(); connect(m_input<span class="operator">,</span> SIGNAL(readyRead())<span class="operator">,</span> SLOT(readMore())); m_pullMode <span class="operator">=</span> <span class="keyword">false</span>; } <span class="keyword">else</span> { m_modeButton<span class="operator">-</span><span class="operator">></span>setText(PushModeLabel); m_pullMode <span class="operator">=</span> <span class="keyword">true</span>; m_audioInput<span class="operator">-</span><span class="operator">></span>start(m_audioInfo); } m_suspendResumeButton<span class="operator">-</span><span class="operator">></span>setText(SuspendLabel); } <span class="type">void</span> InputTest<span class="operator">::</span>toggleSuspend() { <span class="comment">// toggle suspend/resume</span> <span class="keyword">if</span>(m_audioInput<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>SuspendedState) { <a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"status: Suspended, resume()"</span>; m_audioInput<span class="operator">-</span><span class="operator">></span>resume(); m_suspendResumeButton<span class="operator">-</span><span class="operator">></span>setText(SuspendLabel); } <span class="keyword">else</span> <span class="keyword">if</span> (m_audioInput<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>ActiveState) { <a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"status: Active, suspend()"</span>; m_audioInput<span class="operator">-</span><span class="operator">></span>suspend(); m_suspendResumeButton<span class="operator">-</span><span class="operator">></span>setText(ResumeLabel); } <span class="keyword">else</span> <span class="keyword">if</span> (m_audioInput<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>StoppedState) { <a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"status: Stopped, resume()"</span>; m_audioInput<span class="operator">-</span><span class="operator">></span>resume(); m_suspendResumeButton<span class="operator">-</span><span class="operator">></span>setText(SuspendLabel); } <span class="keyword">else</span> <span class="keyword">if</span> (m_audioInput<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>IdleState) { <a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"status: IdleState"</span>; } } <span class="type">void</span> InputTest<span class="operator">::</span>stateChanged(<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>State state) { <a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"state = "</span> <span class="operator"><</span><span class="operator"><</span> state; } <span class="type">void</span> InputTest<span class="operator">::</span>refreshDisplay() { m_canvas<span class="operator">-</span><span class="operator">></span>setLevel(m_audioInfo<span class="operator">-</span><span class="operator">></span>level()); m_canvas<span class="operator">-</span><span class="operator">></span>repaint(); } <span class="type">void</span> InputTest<span class="operator">::</span>deviceChanged(<span class="type">int</span> index) { m_audioInfo<span class="operator">-</span><span class="operator">></span>stop(); m_audioInput<span class="operator">-</span><span class="operator">></span>stop(); m_audioInput<span class="operator">-</span><span class="operator">></span>disconnect(<span class="keyword">this</span>); <span class="keyword">delete</span> m_audioInput; m_device <span class="operator">=</span> m_deviceBox<span class="operator">-</span><span class="operator">></span>itemData(index)<span class="operator">.</span>value<span class="operator"><</span><span class="type"><a href="qaudiodeviceinfo.html">QAudioDeviceInfo</a></span><span class="operator">></span>(); createAudioInput(); }</pre> </div> <!-- @@@multimedia/audioinput/audioinput.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. 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