Remove audiolevels example

QtMultimedia module has changed significantly
between Qt 5 and Qt 6.2, so it is best to just remove
this example and create a new one later on, if necessary.

Fixes: QTBUG-94182
Change-Id: I21c6a342d294bec70b15fc702dd6d3749f3c0884
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

11 files changed, 0 insertions, 558 deletions

diff --git a/examples/datavisualization/CMakeLists.txt b/examples/datavisualization/CMakeLists.txt
index b90ca103..4c46ac6f 100644
--- a/examples/datavisualization/CMakeLists.txt
+++ b/examples/datavisualization/CMakeLists.txt
@@ -24,6 +24,3 @@ if(NOT ANDROID AND NOT IOS AND NOT WINRT)
     add_subdirectory(texturesurface)
     add_subdirectory(volumetric)
 endif()
-if(TARGET Qt::Multimedia AND NOT ANDROID AND NOT IOS AND NOT WINRT)
-    add_subdirectory(audiolevels)
-endif()
diff --git a/examples/datavisualization/audiolevels/CMakeLists.txt b/examples/datavisualization/audiolevels/CMakeLists.txt
deleted file mode 100644
index 8c5ba61c..00000000
--- a/examples/datavisualization/audiolevels/CMakeLists.txt
+++ /dev/null
@@ -1,39 +0,0 @@
-cmake_minimum_required(VERSION 3.14)
-project(audiolevels LANGUAGES CXX)
-
-set(CMAKE_INCLUDE_CURRENT_DIR ON)
-
-set(CMAKE_AUTOMOC ON)
-set(CMAKE_AUTORCC ON)
-set(CMAKE_AUTOUIC ON)
-
-if(NOT DEFINED INSTALL_EXAMPLESDIR)
-  set(INSTALL_EXAMPLESDIR "examples")
-endif()
-
-set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}")
-
-find_package(Qt6 COMPONENTS Core)
-find_package(Qt6 COMPONENTS Gui)
-find_package(Qt6 COMPONENTS Multimedia)
-
-qt_add_executable(audiolevels
-    audiolevels.cpp audiolevels.h
-    audiolevelsiodevice.cpp audiolevelsiodevice.h
-    main.cpp
-)
-set_target_properties(audiolevels PROPERTIES
-    WIN32_EXECUTABLE TRUE
-    MACOSX_BUNDLE TRUE
-)
-target_link_libraries(audiolevels PUBLIC
-    Qt::Core
-    Qt::Gui
-    Qt::Multimedia
-)
-
-install(TARGETS audiolevels
-    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
-    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
-    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
-)
diff --git a/examples/datavisualization/audiolevels/audiolevels.cpp b/examples/datavisualization/audiolevels/audiolevels.cpp
deleted file mode 100644
index 39ef44c7..00000000
--- a/examples/datavisualization/audiolevels/audiolevels.cpp
+++ /dev/null
@@ -1,116 +0,0 @@
-/****************************************************************************
-**
-** 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.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "audiolevelsiodevice.h"
-#include "audiolevels.h"
-
-#include <QtDataVisualization/qbardataproxy.h>
-#include <QtDataVisualization/qvalue3daxis.h>
-#include <QtDataVisualization/q3dscene.h>
-#include <QtDataVisualization/q3dcamera.h>
-#include <QtDataVisualization/qbar3dseries.h>
-#include <QtDataVisualization/q3dtheme.h>
-#include <QtDataVisualization/qcustom3dlabel.h>
-
-#include <QtMultimedia/QAudioDeviceInfo>
-#include <QtMultimedia/QAudioInput>
-
-AudioLevels::AudioLevels(Q3DBars *graph, QObject *parent)
-    : QObject(parent),
-      m_graph(graph),
-      m_device(0),
-      m_audioInput(0)
-{
-    // Set up the graph
-    m_graph->setBarThickness(0.5f);
-    m_graph->setBarSpacing(QSizeF(0.0, 1.0));
-    m_graph->valueAxis()->setRange(-100.0f, 100.0f);
-    m_graph->valueAxis()->setSegmentCount(20);
-    m_graph->valueAxis()->setLabelFormat(QStringLiteral("%d%%"));
-    m_graph->setShadowQuality(QAbstract3DGraph::ShadowQualityNone);
-    m_graph->setSelectionMode(QAbstract3DGraph::SelectionNone);
-    m_graph->scene()->activeCamera()->setCameraPosition(-25.0f, 10.0f, 190.0f);
-    m_graph->activeTheme()->setType(Q3DTheme::ThemeIsabelle);
-    m_graph->activeTheme()->setGridEnabled(true);
-    m_graph->activeTheme()->setBackgroundEnabled(false);
-    QFont font = m_graph->activeTheme()->font();
-    font.setPointSize(10);
-    m_graph->activeTheme()->setFont(font);
-    QBar3DSeries *series = new QBar3DSeries;
-    series->setMesh(QAbstract3DSeries::MeshBar);
-    m_graph->addSeries(series);
-
-    //! [0]
-    QAudioDeviceInfo inputDevice = QAudioDeviceInfo::defaultInputDevice();
-
-    if (inputDevice.supportedSampleRates().size() > 0
-            && inputDevice.supportedChannelCounts().size() > 0
-            && inputDevice.supportedSampleSizes().size() > 0
-            && inputDevice.supportedCodecs().size() > 0) {
-        QAudioFormat formatAudio;
-        formatAudio.setSampleRate(inputDevice.supportedSampleRates().at(0));
-        formatAudio.setChannelCount(inputDevice.supportedChannelCounts().at(0));
-        formatAudio.setSampleSize(inputDevice.supportedSampleSizes().at(0));
-        formatAudio.setCodec(inputDevice.supportedCodecs().at(0));
-        formatAudio.setByteOrder(QAudioFormat::LittleEndian);
-        formatAudio.setSampleType(QAudioFormat::UnSignedInt);
-
-        m_audioInput = new QAudioInput(inputDevice, formatAudio, this);
-#ifdef Q_OS_MAC
-        // OS X seems to wait for entire buffer to fill before calling writeData, so use smaller buffer
-        m_audioInput->setBufferSize(256);
-#else
-        m_audioInput->setBufferSize(1024);
-#endif
-
-        m_device = new AudioLevelsIODevice(m_graph->seriesList().at(0)->dataProxy(), this);
-        m_device->open(QIODevice::WriteOnly);
-
-        m_audioInput->start(m_device);
-    } else {
-        // No graph content can be shown, so add a custom warning label
-        QCustom3DLabel *titleLabel = new QCustom3DLabel("No valid audio input device found",
-                                                        QFont(),
-                                                        QVector3D(0.2f, 0.2f, 0.0f),
-                                                        QVector3D(1.0f, 1.0f, 0.0f),
-                                                        QQuaternion());
-        titleLabel->setPositionAbsolute(true);
-        titleLabel->setFacingCamera(true);
-        m_graph->addCustomItem(titleLabel);
-    }
-    //! [0]
-}
-
-AudioLevels::~AudioLevels()
-{
-    if (m_audioInput)
-        m_audioInput->stop();
-    if (m_device)
-        m_device->close();
-}
diff --git a/examples/datavisualization/audiolevels/audiolevels.h b/examples/datavisualization/audiolevels/audiolevels.h
deleted file mode 100644
index 6d417100..00000000
--- a/examples/datavisualization/audiolevels/audiolevels.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/****************************************************************************
-**
-** 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.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef AUDIOLEVELS_H
-#define AUDIOLEVELS_H
-
-#include <QtDataVisualization/q3dbars.h>
-
-class AudioLevelsIODevice;
-
-QT_BEGIN_NAMESPACE
-class QAudioInput;
-QT_END_NAMESPACE
-
-class AudioLevels : public QObject
-{
-    Q_OBJECT
-
-public:
-    AudioLevels(Q3DBars *graph, QObject *parent = 0);
-    ~AudioLevels();
-
-private:
-    //! [0]
-    Q3DBars *m_graph;
-    AudioLevelsIODevice *m_device;
-    QAudioInput *m_audioInput;
-    //! [0]
-};
-
-#endif
diff --git a/examples/datavisualization/audiolevels/audiolevels.pro b/examples/datavisualization/audiolevels/audiolevels.pro
deleted file mode 100644
index de40e636..00000000
--- a/examples/datavisualization/audiolevels/audiolevels.pro
+++ /dev/null
@@ -1,23 +0,0 @@
-android|ios|winrt {
-    error( "This example is not supported for android, ios, or winrt." )
-}
-
-requires(qtHaveModule(multimedia))
-
-!include( ../examples.pri ) {
-    error( "Couldn't find the examples.pri file!" )
-}
-
-TARGET = audiolevels
-
-QT += multimedia
-
-SOURCES += main.cpp \
-           audiolevels.cpp \
-           audiolevelsiodevice.cpp
-
-HEADERS += audiolevels.h \
-           audiolevelsiodevice.h
-
-OTHER_FILES += doc/src/* \
-               doc/images/*
diff --git a/examples/datavisualization/audiolevels/audiolevelsiodevice.cpp b/examples/datavisualization/audiolevels/audiolevelsiodevice.cpp
deleted file mode 100644
index 60d2de3d..00000000
--- a/examples/datavisualization/audiolevels/audiolevelsiodevice.cpp
+++ /dev/null
@@ -1,112 +0,0 @@
-/****************************************************************************
-**
-** 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.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "audiolevelsiodevice.h"
-#include <QtCore/QDebug>
-
-//! [1]
-static const int resolution = 8;
-static const int rowSize = 800;
-static const int rowCount = 7; // Must be odd number
-static const int middleRow = rowCount / 2;
-//! [1]
-
-AudioLevelsIODevice::AudioLevelsIODevice(QBarDataProxy *proxy, QObject *parent)
-    : QIODevice(parent),
-      m_proxy(proxy),
-      m_array(new QBarDataArray)
-{
-    // We reuse the existing array for maximum performance, so construct the array here
-    //! [0]
-    m_array->reserve(rowCount);
-    for (int i = 0; i < rowCount; i++)
-        m_array->append(new QBarDataRow(rowSize));
-    //! [0]
-
-    qDebug() << "Total of" << (rowSize * rowCount) << "items in the array.";
-}
-
-// Implementation required for this pure virtual function
-qint64 AudioLevelsIODevice::readData(char *data, qint64 maxSize)
-{
-    Q_UNUSED(data);
-    Q_UNUSED(maxSize);
-    return -1;
-}
-
-//! [2]
-qint64 AudioLevelsIODevice::writeData(const char *data, qint64 maxSize)
-{
-    // The amount of new data available.
-    int newDataSize = maxSize / resolution;
-
-    // If we get more data than array size, we need to adjust the start index for new data.
-    int newDataStartIndex = qMax(0, (newDataSize - rowSize));
-
-    // Move the old data ahead in the rows (only do first half of rows + middle one now).
-    // If the amount of new data was larger than row size, skip copying.
-    if (!newDataStartIndex) {
-        for (int i = 0; i <= middleRow; i++) {
-            QBarDataItem *srcPos = m_array->at(i)->data();
-            QBarDataItem *dstPos = srcPos + newDataSize;
-            memmove((void *)dstPos, (void *)srcPos, (rowSize - newDataSize) * sizeof(QBarDataItem));
-        }
-    }
-
-    // Insert data in reverse order, so that newest data is always at the front of the row.
-    int index = 0;
-    for (int i = newDataSize - 1; i >= newDataStartIndex; i--) {
-        // Add 0.01 to the value to avoid gaps in the graph (i.e. zero height bars).
-        // Also, scale to 0...100
-        float value = float(quint8(data[resolution * i]) - 128) / 1.28f + 0.01f;
-        (*m_array->at(middleRow))[index].setValue(value);
-        // Insert a fractional value into front half of the rows.
-        for (int j = 1; j <= middleRow; j++) {
-            float fractionalValue = value / float(j + 1);
-            (*m_array->at(middleRow - j))[index].setValue(fractionalValue);
-        }
-        index++;
-    }
-
-    // Copy the front half of rows to the back half for symmetry.
-    index = 0;
-    for (int i = rowCount - 1; i > middleRow; i--) {
-        QBarDataItem *srcPos = m_array->at(index++)->data();
-        QBarDataItem *dstPos = m_array->at(i)->data();
-        memcpy((void *)dstPos, (void *)srcPos, rowSize * sizeof(QBarDataItem));
-    }
-
-    // Reset the proxy array now that data has been updated to trigger a redraw.
-    m_proxy->resetArray(m_array);
-
-    return maxSize;
-}
-//! [2]
-
-
diff --git a/examples/datavisualization/audiolevels/audiolevelsiodevice.h b/examples/datavisualization/audiolevels/audiolevelsiodevice.h
deleted file mode 100644
index 97fb7b4e..00000000
--- a/examples/datavisualization/audiolevels/audiolevelsiodevice.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/****************************************************************************
-**
-** 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.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef AUDIOLEVELSIODEVICE_H
-#define AUDIOLEVELSIODEVICE_H
-
-#include <QtDataVisualization/qbardataproxy.h>
-#include <QtCore/QIODevice>
-
-class AudioLevelsIODevice : public QIODevice
-{
-    Q_OBJECT
-public:
-    explicit AudioLevelsIODevice(QBarDataProxy *proxy, QObject *parent = nullptr);
-
-protected:
-    qint64 readData(char *data, qint64 maxSize);
-    qint64 writeData(const char *data, qint64 maxSize);
-
-private:
-    //! [0]
-    QBarDataProxy *m_proxy;
-    QBarDataArray *m_array;
-    //! [0]
-};
-
-#endif
diff --git a/examples/datavisualization/audiolevels/doc/images/audiolevels-example.png b/examples/datavisualization/audiolevels/doc/images/audiolevels-example.png
deleted file mode 100644
index ec79eb5a..00000000
--- a/examples/datavisualization/audiolevels/doc/images/audiolevels-example.png
+++ /dev/null
diff --git a/examples/datavisualization/audiolevels/doc/src/audiolevels.qdoc b/examples/datavisualization/audiolevels/doc/src/audiolevels.qdoc
deleted file mode 100644
index 460715b3..00000000
--- a/examples/datavisualization/audiolevels/doc/src/audiolevels.qdoc
+++ /dev/null
@@ -1,98 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:FDL$
-** 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 Free Documentation License Usage
-** Alternatively, this file may be used under the terms of the GNU Free
-** Documentation License version 1.3 as published by the Free Software
-** Foundation and appearing in the file included in the packaging of
-** this file. Please review the following information to ensure
-** the GNU Free Documentation License version 1.3 requirements
-** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-/*!
-    \example audiolevels
-    \title Audiolevels Example
-    \ingroup qtdatavisualization_examples
-    \brief Simple application showing real time audio data.
-
-    The audiolevels example shows how feed real-time dynamic data to a graph using Q3DBars.
-
-    This example reads the audio levels from a microphone and displays those levels
-    in a bar graph. To increase the load for demonstration purposes, and to make the
-    graph little fancier, slightly modified data is used to fill multiple rows.
-
-    \image audiolevels-example.png
-
-    The interesting stuff happens in \c AudioLevels and \c AudioLevelsIODevice classes, so we
-    concentrate on those and skip explaining the basic Q3DBars functionality - for that see
-    \l{Bars Example}.
-
-    \include examples-run.qdocinc
-
-    \section1 Visualizing Audio Levels
-
-    \c AudioLevelsIODevice subclasses QIODevice and is given as input device for QAudioInput
-    class, so it receives microphone data.
-
-    In the header file for \c AudioLevels class we declare necessary members:
-
-    \snippet audiolevels/audiolevels.h 0
-
-    And initialize the microphone listening in the source:
-
-    \snippet audiolevels/audiolevels.cpp 0
-
-    In the header file for \c AudioLevelsIODevice class we store pointers to the data proxy and
-    also the data array we give to the proxy, because we reuse the same array to keep memory
-    reallocations to the minimum:
-
-    \snippet audiolevels/audiolevelsiodevice.h 0
-
-    In the source file we define some static constants to define size of the data array and
-    the middle row index, as well as the resolution of the visualization. You may need to adjust
-    these values to get decent performance in low-end devices:
-
-    \snippet audiolevels/audiolevelsiodevice.cpp 1
-
-    The \c resolution constant indicates the sample rate, for example, value 8 means every eighth
-    byte from audio input is visualized. This is necessary to make the data readable, as it would
-    otherwise make the graph scroll too fast.
-
-    In the \c AudioLevelsIODevice class constructor we initialize the data array:
-
-    \snippet audiolevels/audiolevelsiodevice.cpp 0
-
-    The \c AudioLevelsIODevice::writeData function is called whenever there is new audio data
-    available to be visualized. There we move the old data along the rows and insert new
-    data in the beginning of the rows:
-
-    \snippet audiolevels/audiolevelsiodevice.cpp 2
-
-    We use a couple of techniques here to improve performance. First, we reuse
-    the existing data array, as this allows us to avoid any extra memory allocations in our
-    application code. This also means the data array dimensions do not change, which further
-    improves efficiency in the bar graph renderer.
-    Secondly, since each row is a QList of bar data items, which do not allocate any data that needs
-    deletion, we can utilize \c memmove and \c memcpy functions to quickly move and copy data around.
-
-    \note In the future versions of Qt Data Visualization, QBarDataItem might get extended so that
-    it does allocate some memory to store other optional bar properties besides the value.
-    In use cases where those optional properties are used, using \c memmove and \c memcpy could lead to
-    memory leaks, so use them with care.
-*/
diff --git a/examples/datavisualization/audiolevels/main.cpp b/examples/datavisualization/audiolevels/main.cpp
deleted file mode 100644
index c6f373c6..00000000
--- a/examples/datavisualization/audiolevels/main.cpp
+++ /dev/null
@@ -1,55 +0,0 @@
-/****************************************************************************
-**
-** 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.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "audiolevels.h"
-
-#include <QtGui/QGuiApplication>
-#include <QtMultimedia/QAudio>
-
-int main(int argc, char *argv[])
-{
-    qputenv("QSG_RHI_BACKEND", "opengl");
-    QGuiApplication app(argc, argv);
-
-    Q3DBars window;
-
-    if (!window.hasContext()) {
-        qWarning() << QStringLiteral("Couldn't initialize the OpenGL context.") ;
-        return -1;
-    }
-
-    window.setFlags(window.flags() ^ Qt::FramelessWindowHint);
-    window.resize(800, 500);
-    window.setTitle("Qt Data Visualization - Microphone audio levels visualizer");
-    window.show();
-
-    AudioLevels audioLevels(&window);
-
-    return app.exec();
-}
diff --git a/examples/datavisualization/datavisualization.pro b/examples/datavisualization/datavisualization.pro
index ca01bace..558d4ace 100644
--- a/examples/datavisualization/datavisualization.pro
+++ b/examples/datavisualization/datavisualization.pro
@@ -25,7 +25,5 @@ qtHaveModule(quick) {
                customitems \
                texturesurface \
                volumetric
-
-    qtHaveModule(multimedia): SUBDIRS += audiolevels
 }