1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/*
Copyright (C) 2010 George Kiagiadakis <kiagiadakis.george@gmail.com>
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ui_videowidgettest.h"
#include <QGst/Init>
#include <QGst/Pipeline>
#include <QGst/ElementFactory>
#include <QtGui/QApplication>
#include <QtGui/QMessageBox>
#include <QtGui/QButtonGroup>
class VideoWidgetTest : public QWidget
{
Q_OBJECT
public:
VideoWidgetTest(QWidget* parent = 0, Qt::WindowFlags f = 0);
private Q_SLOTS:
void onButtonClicked(int id);
void on_forceAspectRatioCheckBox_toggled(bool on);
private:
Ui::VideoWidgetTest m_ui;
QGst::PipelinePtr m_pipeline;
QGst::ElementPtr m_src;
QGst::ElementPtr m_sink;
};
VideoWidgetTest::VideoWidgetTest(QWidget *parent, Qt::WindowFlags f)
: QWidget(parent, f)
{
m_ui.setupUi(this);
QButtonGroup *group = new QButtonGroup(this);
group->addButton(m_ui.playingButton, QGst::StatePlaying);
group->addButton(m_ui.pausedButton, QGst::StatePaused);
group->addButton(m_ui.readyButton, QGst::StateReady);
group->addButton(m_ui.nullButton, QGst::StateNull);
connect(group, SIGNAL(buttonClicked(int)), SLOT(onButtonClicked(int)));
m_pipeline = QGst::Pipeline::create();
m_src = QGst::ElementFactory::make("videotestsrc");
if (!m_src) {
throw std::runtime_error("Unable to create a videotestsrc");
}
m_pipeline->add(m_src);
}
void VideoWidgetTest::onButtonClicked(int id)
{
QGst::State currentState;
m_pipeline->getState(¤tState, NULL, 0);
if (currentState == QGst::StateNull) {
if (m_sink) {
m_ui.videoWidget->releaseVideoSink();;
m_pipeline->remove(m_sink);
}
m_sink = QGst::ElementFactory::make(m_ui.elementNameEdit->text());
if (!m_sink) {
QMessageBox::critical(this, "Error", "Could not create the specified sink element");
} else {
m_pipeline->add(m_sink);
m_src->link(m_sink);
m_ui.videoWidget->setVideoSink(m_sink);
}
}
if (m_sink) {
QGst::State state = static_cast<QGst::State>(id);
m_pipeline->setState(state);
}
}
void VideoWidgetTest::on_forceAspectRatioCheckBox_toggled(bool on)
{
if (m_sink) {
m_sink->setProperty("force-aspect-ratio", on);
m_ui.videoWidget->update();
}
}
int main(int argc, char **argv)
{
QApplication app(argc, argv);
QGst::init(&argc, &argv);
VideoWidgetTest test;
test.show();
return app.exec();
}
#include "videowidgettest.moc"
|
