class Window(QMainWindow):
def __init__(self, conf, argv, v4l):
'''
Creates main window of the program.
< conf: Config object
< argv: command line options
< v4l: v4l wrapper object
'''
# config and wrapper instance
self.conf = conf
self.v4l = v4l
# thread: None for evaluating first execution
self.params = thread.CaptureParams(self.conf)
self.thread = None
# application
self.app = QApplication(argv)
super(Window, self).__init__()
## title, icon and default size and position
self.setWindowTitle('V4LCapture')
iconpath = pkg.resource_filename('v4lcapture', 'v4lcapture.png')
if path.isfile(iconpath):
self.setWindowIcon(QIcon(iconpath))
## ui creation
self._createUI()
error.log('created main window')
self._status(message=False)
self._createPreview()
self.capture()
# route, device, preference (when thread is ready)
self.thread.ready.connect(self._route)
self.thread.ready.connect(self._device)
self.thread.ready.connect(self._preferences)
# visualize
self.show()
def _createUI(self):
'''
Create a menubar with file and about menu and a central widget with its
own layout.
Creates the preferences window opened by omonimous entry in file menu.
'''
# menubar
self.menubar = self.menuBar()
## file
file_menu = self.menubar.addMenu('&File')
self.save_act = QAction(QIcon.fromTheme('document-save'),
'&Save settings', self)
self.save_act.setShortcut('Ctrl+S')
self.save_act.triggered.connect(self._save_config)
file_menu.addAction(self.save_act)
self.rst_act = QAction(QIcon.fromTheme('document-revert'),
'&Reset settings', self)
self.rst_act.setShortcut('Ctrl+R')
self.rst_act.triggered.connect(self._reset_config)
file_menu.addAction(self.rst_act)
sep_act1 = QAction(self)
sep_act1.setSeparator(True)
file_menu.addAction(sep_act1)
self.enc_act = QAction(QIcon(), 'S&treaming', self)
self.enc_act.setShortcut('Ctrl+T')
self.enc_act.setCheckable(True)
self.enc_act.setChecked(False)
self.enc_act.toggled.connect(self._toggleEncoding)
file_menu.addAction(self.enc_act)
self.route_act = QAction(QIcon.fromTheme('configure'),
'Add static rout&e', self)
self.route_act.setShortcut('Ctrl+E')
self.route_act.triggered.connect(self._show_route)
file_menu.addAction(self.route_act)
self.dev_act = QAction(QIcon.fromTheme('configure'),
'Change capture &board', self)
self.dev_act.setShortcut('Ctrl+Alt+B')
self.dev_act.triggered.connect(self._show_device)
file_menu.addAction(self.dev_act)
self.pref_act = QAction(QIcon.fromTheme('configure'), '&Preferences', self)
self.pref_act.setShortcut('Ctrl+Alt+P')
self.pref_act.triggered.connect(self._show_preferences)
file_menu.addAction(self.pref_act)
sep_act2 = QAction(self)
sep_act2.setSeparator(True)
file_menu.addAction(sep_act2)
close_act = QAction(QIcon.fromTheme('application-exit'), '&Quit', self)
close_act.setShortcut('Ctrl+Q')
close_act.triggered.connect(self.close)
file_menu.addAction(close_act)
## about
about_menu = self.menubar.addMenu('&About')
wiki_act = QAction(QIcon.fromTheme('help-browser'),
'Go to wiki...', self)
wiki_act.triggered.connect(
lambda:
QDesktopServices.openUrl(QUrl('https://github.com/datasoftsrl/'
'v4lcapture/wiki', QUrl.TolerantMode))
)
about_menu.addAction(wiki_act)
sep_act3 = QAction(self)
sep_act3.setSeparator(True)
about_menu.addAction(sep_act3)
ds_act = QAction(QIcon.fromTheme('applications-internet'),
'DataSoft Srl', self)
ds_act.triggered.connect(
lambda:
QDesktopServices.openUrl(QUrl('http://www.datasoftweb.com/',
QUrl.TolerantMode))
)
about_menu.addAction(ds_act)
qt_act = QAction(QIcon(':/qt-project.org/qmessagebox/images/qtlogo-64.png'),
'About Qt', self)
qt_act.triggered.connect(QApplication.aboutQt)
about_menu.addAction(qt_act)
self.sb_perm = QLabel()
self.sb = self.statusBar()
self.sb.setStyleSheet('''
QStatusBar QLabel {
margin-right: 5px;
}
''')
self.sb.addPermanentWidget(self.sb_perm)
self.sb.setSizeGripEnabled(False)
# central widget and layout
self.central = QWidget()
self.layout = QVBoxLayout()
self.central.setLayout(self.layout)
self.setCentralWidget(self.central)
def _status(self, message=True):
'''
Sets statusbar text on streaming enabled/disabled.
< message: flash a message if True
'''
label = 'address: <b>{}</b>'
tooltip = 'codec: <b>{}</b>\nformat: <b>{}</b>\nsize: <b>{}</b>\n' \
'framerate: <b>{}</b>'
if self.params.encoding():
(width, height) = self.v4l.getFormat()
if message:
self.sb.showMessage('Streaming enabled')
self.sb_perm.setText(label.format(
'<font color="green">{}</font>'.format(self.v4l.getFilename())
))
self.sb_perm.setToolTip(
tooltip.format(
'H.264',
self.v4l.getMuxer(),
'{}x{}'.format(width, height),
'{} fps'.format(self.v4l.getStrFps())
))
else:
if message:
self.sb.showMessage('Streaming disabled')
self.sb_perm.setText(label.format('n/a'))
self.sb_perm.setToolTip(
tooltip.format(
'n/a',
'n/a',
'n/a',
'n/a'
))
'''
Creates a preview of captured frames, occupying the window size.
'''
def _createPreview(self):
self.preview = RgbPreview(self)
self.layout.addWidget(self.preview)
def _toggleEncoding(self):
self.enc_act.toggled.disconnect(self._toggleEncoding)
self.params.toggle_encoding()
if self.params.encoding():
error.log('streaming started at {}'.format(self.v4l.getFilename()))
else:
error.log('streaming stopped')
self._status()
self.capture()
self.enc_act.toggled.connect(self._toggleEncoding)
def _save_config(self):
'''
Write preferences into json object and prints a message in status bar.
'''
self.params.store()
self.conf.write()
self.sb.showMessage('Settings saved')
def _reset_config(self):
'''
Resets prefereneces to line default and prints a message in status bar.
'''
self.params.default()
self.capture()
self.sb.showMessage('Settings reset')
def _route(self):
'''
Create eth choosing window to add static route for streamings.
'''
self.route = RouteDialog(self.central)
error.log('static route window created')
def _show_route(self):
'''
Show eth choosing window.
'''
self.route_act.triggered.disconnect(self._show_route)
self.route.show()
self.route.setFixedSize(self.dev.sizeHint())
self.route_act.triggered.connect(self._show_route)
def _device(self):
'''
Create device choosing window.
'''
self.thread.ready.disconnect(self._device)
self.dev = SimpleDialog(self.v4l, self.params, self.central)
self.dev.setWindowTitle('Change capture board')
self.dev.setWindowIcon(QIcon.fromTheme('preferences-desktop-multimedia'))
error.log('device choosing window created')
def _show_device(self):
'''
Show device choosing window.
'''
self.dev_act.triggered.disconnect(self._show_device)
self.dev.show()
self.dev.setFixedSize(self.dev.sizeHint())
self.dev_act.triggered.connect(self._show_device)
def _preferences(self):
'''
Create preference window.
'''
self.thread.ready.disconnect(self._preferences)
self.pref = TabDialog(self.v4l, self.params, self.central)
self.pref.setWindowTitle('Preferences')
self.pref.setWindowIcon(QIcon.fromTheme('configure'))
error.log('preferences window created')
def _show_preferences(self):
'''
Show preference window.
'''
self.pref_act.triggered.disconnect(self._show_preferences)
self.pref.show()
self.pref.setFixedSize(self.pref.sizeHint())
self.pref_act.triggered.connect(self._show_preferences)
def _updatePreview(self, data):
'''
Updates the preview with a new frame. Called from capture QThread.
< data: RGB data to display
'''
(width, height) = self.v4l.getFormat()
if data is not None:
self.preview.setPixmap(data, width, height)
self.setFixedSize(self.sizeHint())
def capture(self):
'''
Instantiate new QThread to capture frames, waiting for previous to stop.
'''
if self.thread is not None:
self.thread.quit()
self.thread.wait()
self.thread = thread.CaptureThread(self.app, self.v4l, self.params,
self._updatePreview)
self.thread.start()
# update only if initialized
try:
self.thread.ready.connect(self.pref.update)
self.thread.ready.connect(lambda: self._status(message=False))
except AttributeError:
pass
error.log('capture thread created and started')
def closeEvent(self, event):
'''
Closes capture QThread when window is closed.
Closes other windows open.
Writes config.
< event: closing event
'''
self.thread.quit()
self.thread.wait()
error.log('capture thread stopped')
# close only if initialized
try:
self.dev.close()
self.pref.close()
except AttributeError:
pass
# close core log
self.v4l.closeLog()
error.log('core log closed')
old_w = 0
old_h = 0
def resizeEvent(self, event):
'''
If current size is different from previous frame size, resize, else do nothing.
old_w and old_h are defined outside to simulate C static keyword use.
< event: resizing event
'''
size = self.sizeHint()
w = size.width()
h = size.height()
if w != self.old_w or h != self.old_h:
super().resizeEvent(event)
self.old_w = w
self.old_h = h
def quit(self):
'''
Closes main window.
'''
sys.exit(self.app.exec_())
class Window(QMainWindow):
def __init__(self, conf, argv, v4l):
'''
Creates main window of the program.
< conf: Config object
< argv: command line options
< v4l: v4l wrapper object
'''
# config and wrapper instance
self.conf = conf
self.v4l = v4l
# thread: None for evaluating first execution
self.params = thread.CaptureParams(self.conf)
self.thread = None
# application
self.app = QApplication(argv)
super(Window, self).__init__()
## title, icon and default size and position
self.setWindowTitle('V4LCapture')
iconpath = pkg.resource_filename('v4lcapture', 'v4lcapture.png')
if path.isfile(iconpath):
self.setWindowIcon(QIcon(iconpath))
## ui creation
self._createUI()
error.log('created main window')
self._status(message=False)
self._createPreview()
self.capture()
# route, device, preference (when thread is ready)
self.thread.ready.connect(self._route)
self.thread.ready.connect(self._device)
self.thread.ready.connect(self._preferences)
# visualize
self.show()
def _createUI(self):
'''
Create a menubar with file and about menu and a central widget with its
own layout.
Creates the preferences window opened by omonimous entry in file menu.
'''
# menubar
self.menubar = self.menuBar()
## file
file_menu = self.menubar.addMenu('&File')
self.save_act = QAction(QIcon.fromTheme('document-save'),
'&Save settings', self)
self.save_act.setShortcut('Ctrl+S')
self.save_act.triggered.connect(self._save_config)
file_menu.addAction(self.save_act)
self.rst_act = QAction(QIcon.fromTheme('document-revert'),
'&Reset settings', self)
self.rst_act.setShortcut('Ctrl+R')
self.rst_act.triggered.connect(self._reset_config)
file_menu.addAction(self.rst_act)
sep_act1 = QAction(self)
sep_act1.setSeparator(True)
file_menu.addAction(sep_act1)
self.enc_act = QAction(QIcon(), 'S&treaming', self)
self.enc_act.setShortcut('Ctrl+T')
self.enc_act.setCheckable(True)
self.enc_act.setChecked(False)
self.enc_act.toggled.connect(self._toggleEncoding)
file_menu.addAction(self.enc_act)
self.route_act = QAction(QIcon.fromTheme('configure'),
'Add static rout&e', self)
self.route_act.setShortcut('Ctrl+E')
self.route_act.triggered.connect(self._show_route)
file_menu.addAction(self.route_act)
self.dev_act = QAction(QIcon.fromTheme('configure'),
'Change capture &board', self)
self.dev_act.setShortcut('Ctrl+Alt+B')
self.dev_act.triggered.connect(self._show_device)
file_menu.addAction(self.dev_act)
self.pref_act = QAction(QIcon.fromTheme('configure'), '&Preferences',
self)
self.pref_act.setShortcut('Ctrl+Alt+P')
self.pref_act.triggered.connect(self._show_preferences)
file_menu.addAction(self.pref_act)
sep_act2 = QAction(self)
sep_act2.setSeparator(True)
file_menu.addAction(sep_act2)
close_act = QAction(QIcon.fromTheme('application-exit'), '&Quit', self)
close_act.setShortcut('Ctrl+Q')
close_act.triggered.connect(self.close)
file_menu.addAction(close_act)
## about
about_menu = self.menubar.addMenu('&About')
wiki_act = QAction(QIcon.fromTheme('help-browser'), 'Go to wiki...',
self)
wiki_act.triggered.connect(lambda: QDesktopServices.openUrl(
QUrl('https://github.com/datasoftsrl/'
'v4lcapture/wiki', QUrl.TolerantMode)))
about_menu.addAction(wiki_act)
sep_act3 = QAction(self)
sep_act3.setSeparator(True)
about_menu.addAction(sep_act3)
ds_act = QAction(QIcon.fromTheme('applications-internet'),
'DataSoft Srl', self)
ds_act.triggered.connect(lambda: QDesktopServices.openUrl(
QUrl('http://www.datasoftweb.com/', QUrl.TolerantMode)))
about_menu.addAction(ds_act)
qt_act = QAction(
QIcon(':/qt-project.org/qmessagebox/images/qtlogo-64.png'),
'About Qt', self)
qt_act.triggered.connect(QApplication.aboutQt)
about_menu.addAction(qt_act)
self.sb_perm = QLabel()
self.sb = self.statusBar()
self.sb.setStyleSheet('''
QStatusBar QLabel {
margin-right: 5px;
}
''')
self.sb.addPermanentWidget(self.sb_perm)
self.sb.setSizeGripEnabled(False)
# central widget and layout
self.central = QWidget()
self.layout = QVBoxLayout()
self.central.setLayout(self.layout)
self.setCentralWidget(self.central)
def _status(self, message=True):
'''
Sets statusbar text on streaming enabled/disabled.
< message: flash a message if True
'''
label = 'address: <b>{}</b>'
tooltip = 'codec: <b>{}</b>\nformat: <b>{}</b>\nsize: <b>{}</b>\n' \
'framerate: <b>{}</b>'
if self.params.encoding():
(width, height) = self.v4l.getFormat()
if message:
self.sb.showMessage('Streaming enabled')
self.sb_perm.setText(
label.format('<font color="green">{}</font>'.format(
self.v4l.getFilename())))
self.sb_perm.setToolTip(
tooltip.format('H.264', self.v4l.getMuxer(),
'{}x{}'.format(width, height),
'{} fps'.format(self.v4l.getStrFps())))
else:
if message:
self.sb.showMessage('Streaming disabled')
self.sb_perm.setText(label.format('n/a'))
self.sb_perm.setToolTip(tooltip.format('n/a', 'n/a', 'n/a', 'n/a'))
'''
Creates a preview of captured frames, occupying the window size.
'''
def _createPreview(self):
self.preview = RgbPreview(self)
self.layout.addWidget(self.preview)
def _toggleEncoding(self):
self.enc_act.toggled.disconnect(self._toggleEncoding)
self.params.toggle_encoding()
if self.params.encoding():
error.log('streaming started at {}'.format(self.v4l.getFilename()))
else:
error.log('streaming stopped')
self._status()
self.capture()
self.enc_act.toggled.connect(self._toggleEncoding)
def _save_config(self):
'''
Write preferences into json object and prints a message in status bar.
'''
self.params.store()
self.conf.write()
self.sb.showMessage('Settings saved')
def _reset_config(self):
'''
Resets prefereneces to line default and prints a message in status bar.
'''
self.params.default()
self.capture()
self.sb.showMessage('Settings reset')
def _route(self):
'''
Create eth choosing window to add static route for streamings.
'''
self.route = RouteDialog(self.central)
error.log('static route window created')
def _show_route(self):
'''
Show eth choosing window.
'''
self.route_act.triggered.disconnect(self._show_route)
self.route.show()
self.route.setFixedSize(self.dev.sizeHint())
self.route_act.triggered.connect(self._show_route)
def _device(self):
'''
Create device choosing window.
'''
self.thread.ready.disconnect(self._device)
self.dev = SimpleDialog(self.v4l, self.params, self.central)
self.dev.setWindowTitle('Change capture board')
self.dev.setWindowIcon(
QIcon.fromTheme('preferences-desktop-multimedia'))
error.log('device choosing window created')
def _show_device(self):
'''
Show device choosing window.
'''
self.dev_act.triggered.disconnect(self._show_device)
self.dev.show()
self.dev.setFixedSize(self.dev.sizeHint())
self.dev_act.triggered.connect(self._show_device)
def _preferences(self):
'''
Create preference window.
'''
self.thread.ready.disconnect(self._preferences)
self.pref = TabDialog(self.v4l, self.params, self.central)
self.pref.setWindowTitle('Preferences')
self.pref.setWindowIcon(QIcon.fromTheme('configure'))
error.log('preferences window created')
def _show_preferences(self):
'''
Show preference window.
'''
self.pref_act.triggered.disconnect(self._show_preferences)
self.pref.show()
self.pref.setFixedSize(self.pref.sizeHint())
self.pref_act.triggered.connect(self._show_preferences)
def _updatePreview(self, data):
'''
Updates the preview with a new frame. Called from capture QThread.
< data: RGB data to display
'''
(width, height) = self.v4l.getFormat()
if data is not None:
self.preview.setPixmap(data, width, height)
self.setFixedSize(self.sizeHint())
def capture(self):
'''
Instantiate new QThread to capture frames, waiting for previous to stop.
'''
if self.thread is not None:
self.thread.quit()
self.thread.wait()
self.thread = thread.CaptureThread(self.app, self.v4l, self.params,
self._updatePreview)
self.thread.start()
# update only if initialized
try:
self.thread.ready.connect(self.pref.update)
self.thread.ready.connect(lambda: self._status(message=False))
except AttributeError:
pass
error.log('capture thread created and started')
def closeEvent(self, event):
'''
Closes capture QThread when window is closed.
Closes other windows open.
Writes config.
< event: closing event
'''
self.thread.quit()
self.thread.wait()
error.log('capture thread stopped')
# close only if initialized
try:
self.dev.close()
self.pref.close()
except AttributeError:
pass
# close core log
self.v4l.closeLog()
error.log('core log closed')
old_w = 0
old_h = 0
def resizeEvent(self, event):
'''
If current size is different from previous frame size, resize, else do nothing.
old_w and old_h are defined outside to simulate C static keyword use.
< event: resizing event
'''
size = self.sizeHint()
w = size.width()
h = size.height()
if w != self.old_w or h != self.old_h:
super().resizeEvent(event)
self.old_w = w
self.old_h = h
def quit(self):
'''
Closes main window.
'''
sys.exit(self.app.exec_())
def _createPreview(self): self.preview = RgbPreview(self) self.layout.addWidget(self.preview)
def _createPreview(self):
self.preview = RgbPreview(self)
self.layout.addWidget(self.preview)
