1*4882a593Smuzhiyun #include "qtaudio.h"
2*4882a593Smuzhiyun #include <QApplication>
3*4882a593Smuzhiyun #include <QAudioDeviceInfo>
4*4882a593Smuzhiyun #include <QAudioOutput>
5*4882a593Smuzhiyun #include <QDebug>
6*4882a593Smuzhiyun #include <QDesktopWidget>
7*4882a593Smuzhiyun
qtAudio(QWidget * parent)8*4882a593Smuzhiyun qtAudio::qtAudio(QWidget *parent)
9*4882a593Smuzhiyun {
10*4882a593Smuzhiyun const QRect availableGeometry = QApplication::desktop()->availableGeometry(parent);
11*4882a593Smuzhiyun resize(availableGeometry.width(), availableGeometry.height());
12*4882a593Smuzhiyun QFont f;
13*4882a593Smuzhiyun f.setPixelSize(availableGeometry.height()/20);
14*4882a593Smuzhiyun listWidget = new QListWidget();
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun QList<QAudioDeviceInfo> alist = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
17*4882a593Smuzhiyun QAudioDeviceInfo defaultinfo(QAudioDeviceInfo::defaultOutputDevice());
18*4882a593Smuzhiyun qDebug() << "default device name: " << defaultinfo.deviceName();
19*4882a593Smuzhiyun for(auto info : alist){
20*4882a593Smuzhiyun QListWidgetItem *audioItem = new QListWidgetItem();
21*4882a593Smuzhiyun audioItem->setText(info.deviceName());
22*4882a593Smuzhiyun audioItem->setFont(f);
23*4882a593Smuzhiyun audioItem->setFlags(audioItem->flags() | Qt::ItemIsUserCheckable);
24*4882a593Smuzhiyun if(defaultinfo == info){
25*4882a593Smuzhiyun audioItem->setCheckState(Qt::Checked);
26*4882a593Smuzhiyun } else {
27*4882a593Smuzhiyun audioItem->setCheckState(Qt::Unchecked);
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun qDebug() << info.deviceName();
30*4882a593Smuzhiyun listWidget->addItem(audioItem);
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun listWidget->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
33*4882a593Smuzhiyun listWidget->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
34*4882a593Smuzhiyun listWidget->setMinimumHeight(listWidget->sizeHintForRow(0) * listWidget->count());
35*4882a593Smuzhiyun listWidget->setMaximumHeight(listWidget->sizeHintForRow(0) * listWidget->count());
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun slider = new QSlider(Qt::Horizontal);
38*4882a593Smuzhiyun slider->setMinimum(0);
39*4882a593Smuzhiyun slider->setMaximum(10);
40*4882a593Smuzhiyun QAudioOutput out(defaultinfo);
41*4882a593Smuzhiyun qreal v = out.volume();
42*4882a593Smuzhiyun slider->setValue(qRound(v*10));
43*4882a593Smuzhiyun connect(slider, SIGNAL(valueChanged(int)), this, SLOT(changeVolume(int)));
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun vLayout = new QVBoxLayout();
46*4882a593Smuzhiyun vLayout->addWidget(listWidget);
47*4882a593Smuzhiyun vLayout->addWidget(slider);
48*4882a593Smuzhiyun vLayout->setAlignment(Qt::AlignTop);
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun setLayout(vLayout);
51*4882a593Smuzhiyun setStyleSheet("background-color:rgb(204,228,247)");
52*4882a593Smuzhiyun setObjectName("Audio");
53*4882a593Smuzhiyun connect(listWidget, SIGNAL(itemClicked(QListWidgetItem *)), this, SLOT(on_itemClicked(QListWidgetItem *)));
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun
~qtAudio()56*4882a593Smuzhiyun qtAudio::~qtAudio()
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun listWidget->clear();
59*4882a593Smuzhiyun delete listWidget;
60*4882a593Smuzhiyun delete slider;
61*4882a593Smuzhiyun delete vLayout;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
on_itemClicked(QListWidgetItem * item)64*4882a593Smuzhiyun void qtAudio::on_itemClicked(QListWidgetItem *item)
65*4882a593Smuzhiyun {
66*4882a593Smuzhiyun qDebug() << item->text();
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
changeVolume(int value)70*4882a593Smuzhiyun void qtAudio::changeVolume(int value)
71*4882a593Smuzhiyun {
72*4882a593Smuzhiyun QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
73*4882a593Smuzhiyun QAudioOutput out(info);
74*4882a593Smuzhiyun qreal linearVolume = QAudio::convertVolume(value / qreal(100.0),
75*4882a593Smuzhiyun QAudio::LinearVolumeScale,
76*4882a593Smuzhiyun QAudio::LogarithmicVolumeScale);
77*4882a593Smuzhiyun qDebug() << value;
78*4882a593Smuzhiyun qreal v = qreal(value) / qreal(10.0);
79*4882a593Smuzhiyun qDebug() << v;
80*4882a593Smuzhiyun out.setVolume(v);
81*4882a593Smuzhiyun QApplication::beep();
82*4882a593Smuzhiyun }
83