1 #include "qtaudio.h"
2 #include <QApplication>
3 #include <QAudioDeviceInfo>
4 #include <QAudioOutput>
5 #include <QDebug>
6 #include <QDesktopWidget>
7
qtAudio(QWidget * parent)8 qtAudio::qtAudio(QWidget *parent)
9 {
10 const QRect availableGeometry = QApplication::desktop()->availableGeometry(parent);
11 resize(availableGeometry.width(), availableGeometry.height());
12 QFont f;
13 f.setPixelSize(availableGeometry.height()/20);
14 listWidget = new QListWidget();
15
16 QList<QAudioDeviceInfo> alist = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
17 QAudioDeviceInfo defaultinfo(QAudioDeviceInfo::defaultOutputDevice());
18 qDebug() << "default device name: " << defaultinfo.deviceName();
19 for(auto info : alist){
20 QListWidgetItem *audioItem = new QListWidgetItem();
21 audioItem->setText(info.deviceName());
22 audioItem->setFont(f);
23 audioItem->setFlags(audioItem->flags() | Qt::ItemIsUserCheckable);
24 if(defaultinfo == info){
25 audioItem->setCheckState(Qt::Checked);
26 } else {
27 audioItem->setCheckState(Qt::Unchecked);
28 }
29 qDebug() << info.deviceName();
30 listWidget->addItem(audioItem);
31 }
32 listWidget->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
33 listWidget->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
34 listWidget->setMinimumHeight(listWidget->sizeHintForRow(0) * listWidget->count());
35 listWidget->setMaximumHeight(listWidget->sizeHintForRow(0) * listWidget->count());
36
37 slider = new QSlider(Qt::Horizontal);
38 slider->setMinimum(0);
39 slider->setMaximum(10);
40 QAudioOutput out(defaultinfo);
41 qreal v = out.volume();
42 slider->setValue(qRound(v*10));
43 connect(slider, SIGNAL(valueChanged(int)), this, SLOT(changeVolume(int)));
44
45 vLayout = new QVBoxLayout();
46 vLayout->addWidget(listWidget);
47 vLayout->addWidget(slider);
48 vLayout->setAlignment(Qt::AlignTop);
49
50 setLayout(vLayout);
51 setStyleSheet("background-color:rgb(204,228,247)");
52 setObjectName("Audio");
53 connect(listWidget, SIGNAL(itemClicked(QListWidgetItem *)), this, SLOT(on_itemClicked(QListWidgetItem *)));
54 }
55
~qtAudio()56 qtAudio::~qtAudio()
57 {
58 listWidget->clear();
59 delete listWidget;
60 delete slider;
61 delete vLayout;
62 }
63
on_itemClicked(QListWidgetItem * item)64 void qtAudio::on_itemClicked(QListWidgetItem *item)
65 {
66 qDebug() << item->text();
67
68 }
69
changeVolume(int value)70 void qtAudio::changeVolume(int value)
71 {
72 QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
73 QAudioOutput out(info);
74 qreal linearVolume = QAudio::convertVolume(value / qreal(100.0),
75 QAudio::LinearVolumeScale,
76 QAudio::LogarithmicVolumeScale);
77 qDebug() << value;
78 qreal v = qreal(value) / qreal(10.0);
79 qDebug() << v;
80 out.setVolume(v);
81 QApplication::beep();
82 }
83