def add_video_device_change_callback(callback):
from xpra.platform.webcam import _video_device_change_callbacks, _fire_video_device_change
global _watch_manager, _notifier
try:
import pyinotify
except ImportError as e:
log.error("Error: cannot watch for video device changes without pyinotify:")
log.error(" %s", e)
return
log("add_video_device_change_callback(%s) pyinotify=%s", callback, pyinotify)
if not _watch_manager:
class EventHandler(pyinotify.ProcessEvent):
def process_IN_CREATE(self, event):
_fire_video_device_change(True, event.pathname)
def process_IN_DELETE(self, event):
_fire_video_device_change(False, event.pathname)
_watch_manager = pyinotify.WatchManager()
mask = pyinotify.IN_DELETE | pyinotify.IN_CREATE #@UndefinedVariable
handler = EventHandler(pevent=_video_device_file_filter)
_notifier = pyinotify.ThreadedNotifier(_watch_manager, handler)
_notifier.setDaemon(True)
wdd = _watch_manager.add_watch('/dev', mask)
log("watching for video device changes in /dev")
log("notifier=%s, watch=%s", _notifier, wdd)
_notifier.start()
_video_device_change_callbacks.append(callback)
def add_video_device_change_callback(callback):
from xpra.platform.webcam import _video_device_change_callbacks, _fire_video_device_change
global _watch_manager, _notifier
try:
import pyinotify
except ImportError as e:
log.error(
"Error: cannot watch for video device changes without pyinotify:")
log.error(" %s", e)
return
log("add_video_device_change_callback(%s) pyinotify=%s", callback,
pyinotify)
if not _watch_manager:
class EventHandler(pyinotify.ProcessEvent):
def process_IN_CREATE(self, event):
_fire_video_device_change(True, event.pathname)
def process_IN_DELETE(self, event):
_fire_video_device_change(False, event.pathname)
_watch_manager = pyinotify.WatchManager()
mask = pyinotify.IN_DELETE | pyinotify.IN_CREATE #@UndefinedVariable
handler = EventHandler(pevent=_video_device_file_filter)
_notifier = pyinotify.ThreadedNotifier(_watch_manager, handler)
_notifier.setDaemon(True)
wdd = _watch_manager.add_watch('/dev', mask)
log("watching for video device changes in /dev")
log("notifier=%s, watch=%s", _notifier, wdd)
_notifier.start()
_video_device_change_callbacks.append(callback)
def add_video_device_change_callback(callback):
if not get_win32_event_listener:
return
from xpra.platform.webcam import _video_device_change_callbacks
if len(_video_device_change_callbacks)==0:
#first callback added, register our handler:
get_win32_event_listener().add_event_callback(WM_DEVICECHANGE, callback)
_video_device_change_callbacks.append(_device_change_callback)
