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Added axes titles to audio example and decreased the number of samples on chart to 2000
Marek Rosa -
r2214:0a3cbf6ad29b
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@@ -1,59 +1,62
1 #include "widget.h"
1 #include "widget.h"
2 #include <QAudioDeviceInfo>
2 #include <QAudioDeviceInfo>
3 #include <QAudioInput>
3 #include <QAudioInput>
4 #include <QChartView>
4 #include <QChartView>
5 #include <QLineSeries>
5 #include <QLineSeries>
6 #include <QChart>
6 #include <QChart>
7 #include <QVBoxLayout>
7 #include <QVBoxLayout>
8 #include <QValueAxis>
8 #include <QValueAxis>
9 #include "xyseriesiodevice.h"
9 #include "xyseriesiodevice.h"
10
10
11 QTCOMMERCIALCHART_USE_NAMESPACE
11 QTCOMMERCIALCHART_USE_NAMESPACE
12
12
13 Widget::Widget(QWidget *parent)
13 Widget::Widget(QWidget *parent)
14 : QWidget(parent),
14 : QWidget(parent),
15 m_device(0),
15 m_device(0),
16 m_chart(0),
16 m_chart(0),
17 m_series(0),
17 m_series(0),
18 m_audioInput(0)
18 m_audioInput(0)
19 {
19 {
20 m_chart = new QChart;
20 m_chart = new QChart;
21 QChartView *chartView = new QChartView(m_chart);
21 QChartView *chartView = new QChartView(m_chart);
22 chartView->setMinimumSize(800, 600);
22 chartView->setMinimumSize(800, 600);
23 m_series = new QLineSeries;
23 m_series = new QLineSeries;
24 m_chart->addSeries(m_series);
24 m_chart->addSeries(m_series);
25 QValueAxis *axisX = new QValueAxis;
25 QValueAxis *axisX = new QValueAxis;
26 axisX->setRange(0, 4000);
26 axisX->setRange(0, 2000);
27 axisX->setLabelFormat("%g");
28 axisX->setTitle("Samples");
27 QValueAxis *axisY = new QValueAxis;
29 QValueAxis *axisY = new QValueAxis;
28 axisY->setRange(0, 256);
30 axisY->setRange(-1, 1);
29 m_chart->setAxisX(axisX, m_series);
31 axisY->setTitle("Audio level");
32 m_chart->setAxisX(axisX, m_series);
30 m_chart->setAxisY(axisY, m_series);
33 m_chart->setAxisY(axisY, m_series);
31 m_chart->legend()->hide();
34 m_chart->legend()->hide();
32 m_chart->setTitle("Data from microphone");
35 m_chart->setTitle("Data from the microphone");
33
36
34 QVBoxLayout *mainLayout = new QVBoxLayout;
37 QVBoxLayout *mainLayout = new QVBoxLayout;
35 mainLayout->addWidget(chartView);
38 mainLayout->addWidget(chartView);
36 setLayout(mainLayout);
39 setLayout(mainLayout);
37
40
38 QAudioFormat formatAudio;
41 QAudioFormat formatAudio;
39 formatAudio.setFrequency(8000);
42 formatAudio.setFrequency(8000);
40 formatAudio.setChannels(1);
43 formatAudio.setChannels(1);
41 formatAudio.setSampleSize(8);
44 formatAudio.setSampleSize(8);
42 formatAudio.setCodec("audio/pcm");
45 formatAudio.setCodec("audio/pcm");
43 formatAudio.setByteOrder(QAudioFormat::LittleEndian);
46 formatAudio.setByteOrder(QAudioFormat::LittleEndian);
44 formatAudio.setSampleType(QAudioFormat::UnSignedInt);
47 formatAudio.setSampleType(QAudioFormat::UnSignedInt);
45
48
46 QAudioDeviceInfo inputDevices = QAudioDeviceInfo::defaultInputDevice();
49 QAudioDeviceInfo inputDevices = QAudioDeviceInfo::defaultInputDevice();
47 m_audioInput = new QAudioInput(inputDevices,formatAudio, this);
50 m_audioInput = new QAudioInput(inputDevices,formatAudio, this);
48
51
49 m_device = new XYSeriesIODevice(m_series, this);
52 m_device = new XYSeriesIODevice(m_series, this);
50 m_device->open(QIODevice::WriteOnly);
53 m_device->open(QIODevice::WriteOnly);
51
54
52 m_audioInput->start(m_device);
55 m_audioInput->start(m_device);
53 }
56 }
54
57
55 Widget::~Widget()
58 Widget::~Widget()
56 {
59 {
57 m_audioInput->stop();
60 m_audioInput->stop();
58 m_device->close();
61 m_device->close();
59 }
62 }
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@@ -1,36 +1,37
1 #include "xyseriesiodevice.h"
1 #include "xyseriesiodevice.h"
2 #include <QXYSeries>
2 #include <QXYSeries>
3
3
4 XYSeriesIODevice::XYSeriesIODevice(QXYSeries * series, QObject *parent) :
4 XYSeriesIODevice::XYSeriesIODevice(QXYSeries * series, QObject *parent) :
5 QIODevice(parent),
5 QIODevice(parent),
6 m_series(series)
6 m_series(series)
7 {
7 {
8 }
8 }
9
9
10 qint64 XYSeriesIODevice::readData(char * data, qint64 maxSize)
10 qint64 XYSeriesIODevice::readData(char * data, qint64 maxSize)
11 {
11 {
12 Q_UNUSED(data)
12 Q_UNUSED(data)
13 Q_UNUSED(maxSize)
13 Q_UNUSED(maxSize)
14 return -1;
14 return -1;
15 }
15 }
16
16
17 qint64 XYSeriesIODevice::writeData(const char * data, qint64 maxSize)
17 qint64 XYSeriesIODevice::writeData(const char * data, qint64 maxSize)
18 {
18 {
19 qint64 range = 4000;
19 qint64 range = 2000;
20 QList<QPointF> oldPoints = m_series->points();
20 QList<QPointF> oldPoints = m_series->points();
21 QList<QPointF> points;
21 QList<QPointF> points;
22 int resolution = 4;
22
23
23 if (oldPoints.count() < range) {
24 if (oldPoints.count() < range) {
24 points = m_series->points();
25 points = m_series->points();
25 } else {
26 } else {
26 for (int i = maxSize/2; i < oldPoints.count(); i++)
27 for (int i = maxSize/resolution; i < oldPoints.count(); i++)
27 points.append(QPointF(i - maxSize/2, oldPoints.at(i).y()));
28 points.append(QPointF(i - maxSize/resolution, oldPoints.at(i).y()));
28 }
29 }
29
30
30 qint64 size = points.count();
31 qint64 size = points.count();
31 for (int k = 0; k < maxSize/2; k++)
32 for (int k = 0; k < maxSize/resolution; k++)
32 points.append(QPointF(k + size, (quint8)data[2 * k]));
33 points.append(QPointF(k + size, ((quint8)data[resolution * k] - 128)/128.0));
33
34
34 m_series->replace(points);
35 m_series->replace(points);
35 return maxSize;
36 return maxSize;
36 }
37 }
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