HG_REPOSITORIES/LPP/INSTRUMENTATION/USERS/JEANDET/qtcharts Commit - r2155:efb312b94196

Added audio input demo

Marek Rosa -

r2155:efb312b94196

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r2155:efb312b94196

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demos/audio/audio.pro created 644 +13 0

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	1	!include( ../demos.pri ):error( "Couldn't find the demos.pri file!" )
	2
	3	QT += multimedia
	4
	5	TARGET = audio
	6	TEMPLATE = app
	7
	8	SOURCES += main.cpp\
	9	widget.cpp \
	10	xyseriesiodevice.cpp
	11
	12	HEADERS += widget.h \
	13	xyseriesiodevice.h

demos/audio/lineseriesdevice.cpp created 644 +6 0

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	1	#include "lineseriesdevice.h"
	2
	3	LineSeriesDevice::LineSeriesDevice(QObject *parent) :
	4	QLineSeries(parent)
	5	{
	6	}

demos/audio/lineseriesdevice.h created 644 +21 0

@@ -0,0 +1,21
	1	#ifndef LINESERIESDEVICE_H
	2	#define LINESERIESDEVICE_H
	3
	4	#include <QLineSeries>
	5	#include <QIODevice>
	6
	7	QTCOMMERCIALCHART_USE_NAMESPACE
	8
	9	class LineSeriesDevice : public QIODevice, public QLineSeries
	10	{
	11	Q_OBJECT
	12	public:
	13	explicit LineSeriesDevice(QObject *parent = 0);
	14
	15	signals:
	16
	17	public slots:
	18
	19	;
	20
	21	#endif // LINESERIESDEVICE_H

demos/audio/main.cpp created 644 +11 0

@@ -0,0 +1,11
	1	#include <QApplication>
	2	#include "widget.h"
	3
	4	int main(int argc, char *argv[])
	5	{
	6	QApplication a(argc, argv);
	7	Widget w;
	8	w.show();
	9
	10	return a.exec();
	11	}

demos/audio/widget.cpp created 644 +59 0

@@ -0,0 +1,59
	1	#include "widget.h"
	2	#include <QAudioDeviceInfo>
	3	#include <QAudioInput>
	4	#include <QChartView>
	5	#include <QLineSeries>
	6	#include <QChart>
	7	#include <QVBoxLayout>
	8	#include <QValueAxis>
	9	#include "xyseriesiodevice.h"
	10
	11	QTCOMMERCIALCHART_USE_NAMESPACE
	12
	13	Widget::Widget(QWidget *parent)
	14	: QWidget(parent),
	15	m_device(0),
	16	m_chart(0),
	17	m_series(0),
	18	m_audioInput(0)
	19	{
	20	m_chart = new QChart;
	21	QChartView *chartView = new QChartView(m_chart);
	22	chartView->setMinimumSize(800, 600);
	23	m_series = new QLineSeries;
	24	m_chart->addSeries(m_series);
	25	QValueAxis *axisX = new QValueAxis;
	26	axisX->setRange(0, 8000);
	27	QValueAxis *axisY = new QValueAxis;
	28	axisY->setRange(0, 256);
	29	m_chart->setAxisX(axisX, m_series);
	30	m_chart->setAxisY(axisY, m_series);
	31	m_chart->setTitle("Data from microphone");
	32
	33	QVBoxLayout *mainLayout = new QVBoxLayout;
	34	mainLayout->addWidget(chartView);
	35	setLayout(mainLayout);
	36
	37	QAudioFormat formatAudio;
	38	formatAudio.setFrequency(8000);
	39	formatAudio.setChannels(1);
	40	formatAudio.setSampleSize(8);
	41	formatAudio.setCodec("audio/pcm");
	42	formatAudio.setByteOrder(QAudioFormat::LittleEndian);
	43	formatAudio.setSampleType(QAudioFormat::UnSignedInt);
	44
	45	QAudioDeviceInfo inputDevices = QAudioDeviceInfo::defaultInputDevice();
	46	m_audioInput = new QAudioInput(inputDevices,formatAudio, this);
	47
	48	m_device = new XYSeriesIODevice(m_series, this);
	49	m_device->open(QIODevice::WriteOnly);
	50
	51	m_audioInput->setBufferSize(10);
	52	m_audioInput->start(m_device);
	53	}
	54
	55	Widget::~Widget()
	56	{
	57	m_audioInput->stop();
	58	m_device->close();
	59	}

demos/audio/widget.h created 644 +32 0

@@ -0,0 +1,32
	1	#ifndef WIDGET_H
	2	#define WIDGET_H
	3
	4	#include <QWidget>
	5	#include <QChartGlobal>
	6
	7	QTCOMMERCIALCHART_BEGIN_NAMESPACE
	8	class QLineSeries;
	9	class QChart;
	10	QTCOMMERCIALCHART_END_NAMESPACE
	11
	12	QTCOMMERCIALCHART_USE_NAMESPACE
	13
	14	class XYSeriesIODevice;
	15	class QAudioInput;
	16
	17	class Widget : public QWidget
	18	{
	19	Q_OBJECT
	20
	21	public:
	22	Widget(QWidget *parent = 0);
	23	~Widget();
	24
	25	private:
	26	XYSeriesIODevice *m_device;
	27	QChart *m_chart;
	28	QLineSeries *m_series;
	29	QAudioInput *m_audioInput;
	30	};
	31
	32	#endif // WIDGET_H

demos/audio/xyseriesiodevice.cpp created 644 +36 0

@@ -0,0 +1,36
	1	#include "xyseriesiodevice.h"
	2	#include <QXYSeries>
	3
	4	XYSeriesIODevice::XYSeriesIODevice(QXYSeries * series, QObject *parent) :
	5	QIODevice(parent),
	6	m_series(series)
	7	{
	8	}
	9
	10	qint64 XYSeriesIODevice::readData(char * data, qint64 maxSize)
	11	{
	12	Q_UNUSED(data)
	13	Q_UNUSED(maxSize)
	14	return -1;
	15	}
	16
	17	qint64 XYSeriesIODevice::writeData(const char * data, qint64 maxSize)
	18	{
	19	qint64 range = 8000;
	20	QList<QPointF> oldPoints = m_series->points();
	21	QList<QPointF> points;
	22
	23	if (oldPoints.count() < range) {
	24	points = m_series->points();
	25	} else {
	26	for (int i = maxSize; i < oldPoints.count(); i++)
	27	points.append(QPointF(i - maxSize, oldPoints.at(i).y()));
	28	}
	29
	30	qint64 size = points.count();
	31	for (int k = 0; k < maxSize; k++)
	32	points.append(QPointF(k + size, (quint8)data[k]));
	33
	34	m_series->replace(points);
	35	return maxSize;
	36	}

demos/audio/xyseriesiodevice.h created 644 +27 0

@@ -0,0 +1,27
	1	#ifndef XYSERIESIODEVICE_H
	2	#define XYSERIESIODEVICE_H
	3
	4	#include <QIODevice>
	5	#include <QChartGlobal>
	6
	7	QTCOMMERCIALCHART_BEGIN_NAMESPACE
	8	class QXYSeries;
	9	QTCOMMERCIALCHART_END_NAMESPACE
	10
	11	QTCOMMERCIALCHART_USE_NAMESPACE
	12
	13	class XYSeriesIODevice : public QIODevice
	14	{
	15	Q_OBJECT
	16	public:
	17	explicit XYSeriesIODevice(QXYSeries * series, QObject *parent = 0);
	18
	19	protected:
	20	qint64 readData(char * data, qint64 maxSize);
	21	qint64 writeData(const char * data, qint64 maxSize);
	22
	23	private:
	24	QXYSeries *m_series;
	25	};
	26
	27	#endif // XYSERIESIODEVICE_H

demos/demos.pro +2 -1

                        qmlcustommodel \
                        chartinteractions \
                        qmlaxes \
-                       qmlcustomlegend
+                       qmlcustomlegend \
+                audio
             contains(QT_CONFIG, opengl) {
                     SUBDIRS +=  chartthemes \

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