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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtDataVisualization module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
**
****************************************************************************/
#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 <QAudioDeviceInfo>
#include <QAudioInput>
QT_DATAVISUALIZATION_USE_NAMESPACE
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(QDataVis::ShadowQualityNone);
m_graph->setSelectionMode(QDataVis::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]
QAudioFormat formatAudio;
formatAudio.setSampleRate(8000);
formatAudio.setChannelCount(1);
formatAudio.setSampleSize(8);
formatAudio.setCodec("audio/pcm");
formatAudio.setByteOrder(QAudioFormat::LittleEndian);
formatAudio.setSampleType(QAudioFormat::UnSignedInt);
QAudioDeviceInfo inputDevices = QAudioDeviceInfo::defaultInputDevice();
m_audioInput = new QAudioInput(inputDevices, formatAudio, this);
#ifdef Q_OS_MAC
// Mac 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);
//! [0]
}
AudioLevels::~AudioLevels()
{
m_audioInput->stop();
m_device->close();
}
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