| /**************************************************************************** |
| ** |
| ** 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 |
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| ** |
| ** 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> |
| |
| using namespace QtDataVisualization; |
| |
| 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(); |
| } |