/usr/share/pyshared/pyxine/event.py is in python-pyxine 0.1alpha2-7build1.
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#
# Copyright (C) 2003 Geoffrey T. Dairiki <dairiki@dairiki.org>
#
# This file is part of Pyxine, Python bindings for xine.
#
# Pyxine is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# Pyxine 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
from pyxine import libxine, constants, constwrap, cstruct
class Event(cstruct.xine_event_t):
_owned = 0
def __init__(self, _raw, _owned=0):
cstruct.xine_event_t.__init__(self, _raw)
self._owned = _owned
self.__super = cstruct.super(Event, self)
def __get_type(self):
return constwrap.XINE_EVENT(self.__super.type)
def __set_type(self, val):
self.__super.type = constwrap.XINE_EVENT(val)
type = property(__get_type, __set_type, doc="The event type")
def __get_data(self):
data = self.__super.data
try:
return self._data_type(data)
except AttributeError:
return data
data = property(__get_data, doc="The event data")
def __del__(self):
if self._owned:
libxine.xine_event_free(self.this)
print "Event freed"
class xine_format_change_data_t(cstruct.xine_format_change_data_t):
def __init__(self, _raw):
cstruct.xine_format_change_data_t.__init__(self, _raw)
self.__super = cstruct.super(xine_format_change_data_t, self)
def __get_aspect(self):
return constwrap.XINE_VO_ASPECT(self.__super.aspect)
aspect = property(__get_aspect, doc="The aspect ratio code")
def get_video_geometry(self, default_aspect=4.0/3.0):
width, height = self.width, self.height
video_aspect = self.get_aspect_ratio(default_aspect)
pixel_aspect = video_aspect * height / width
return width, height, pixel_aspect
def get_aspect_ratio(self, default=None):
# FIXME: this may not be right
aspect = self.aspect
if aspect == "4_3":
return 4.0 / 3.0
elif aspect in ("ANAMORPHIC", "PAN_SCAN"):
return 16.0 / 9.0
elif aspect == "DVB":
return 2.11
elif aspect in ("SQUARE", "DONT_TOUCH"):
return float(self.width) / float(self.height)
else:
return default
class UIDataEvent(Event):
_data_type = cstruct.xine_ui_data_t
class FrameFormatChangeEvent(Event):
_data_type = xine_format_change_data_t
class AudioLevelEvent(Event):
_data_type = cstruct.xine_audio_level_data_t
class ProgressEvent(Event):
_data_type = cstruct.xine_progress_data_t
class InputEvent(Event):
_data_type = cstruct.xine_input_data_t
def __init__(self, type=None, button=0, x=0, y=0, _raw=None, _owned=0):
if _raw is None:
if type is None:
raise ValueError, "must specify a type"
# FIXME: check type for validity as XINE_EVENT_INPUT type
type = constwrap.XINE_EVENT(type)
_raw = libxine.px_make_input_event(type, button, x, y)
# This is a PyBuffer and will auto-free itself...
_owned = 0
Event.__init__(self, _raw, _owned)
_event_types = {
constants.XINE_EVENT_UI_SET_TITLE: UIDataEvent,
constants.XINE_EVENT_UI_MESSAGE: UIDataEvent,
constants.XINE_EVENT_FRAME_FORMAT_CHANGE: FrameFormatChangeEvent,
constants.XINE_EVENT_AUDIO_LEVEL: AudioLevelEvent,
constants.XINE_EVENT_PROGRESS: ProgressEvent,
#constants.XINE_EVENT_INPUT_MOUSE_BUTTON: InputEvent,
#constants.XINE_EVENT_INPUT_MOUSE_MOVE: InputEvent,
#constants.XINE_EVENT_INPUT_BUTTON_FORCE: spu_button_t, #???
}
def _wrap_event(raw, owned=0):
event = cstruct.xine_event_t(raw)
if event.data_length == 0:
# FIXME: check for actual data size needed?
return Event(_raw=raw, _owned=owned)
elif constwrap.XINE_EVENT_INPUT.contains(event.type):
return InputEvent(_raw=raw, _owned=owned)
else:
cls = _event_types.get(event.type, Event)
return cls(_raw=raw, _owned=owned)
class EventQueueBase:
def __init__(self, stream, this):
self.stream, self.this = stream, this
def __del__(self):
libxine.xine_event_dispose_queue(self.this)
print "deleted EventQueue"
class EventQueue(EventQueueBase):
def get(self):
e = libxine.xine_event_get(self.this)
if e is None:
return None
return _wrap_event(e, owned=1)
def wait(self):
e = libxine.xine_event_wait(self.this)
return _wrap_event(e, owned=1)
class ListenerThread(EventQueueBase):
"""
ALERT: We hold a reference to your callback.
If it is, e.g. a bound method, you may have problems
with garbage collection not happening at the right times.
You can fix this by using a weakly bound method (see
weakmethod.)
"""
def __init__(self, stream, this, callback):
EventQueueBase.__init__(self, stream, this)
if not callable(callback):
raise ValueError, "callback not callable"
def cb_wrap (e):
callback(_wrap_event(e, owned=0))
libxine.xine_event_create_listener_thread(self.this, cb_wrap)
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