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gstreamer/bindings/python/gi/overrides/GES.py

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bindings: Start implementing overrides for python
2012-09-13 23:05:45 +00:00
# -*- Mode: Python; py-indent-offset: 4 -*-
# vim: tabstop=4 shiftwidth=4 expandtab
#
# GES.py
#
# Copyright (C) 2012 Thibault Saunier <thibault.saunier@collabora.com>
#
# This program 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, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
# This program 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 3, or (at your option)
# any later version.
import sys
from ..overrides import override
from ..importer import modules
ges: Call the right ->set_child_property vmethod We used to always call the `->set_child_property` virtual method of the object that `ges_timeline_element_set_child_property` was called from, but that means that, in the case of referencing GESContainer children properties from its children, the children wouldn't know what child property have been set, and the children override wouldn't be takent into account, in turns, it means that the behaviour could be different in the setter depending on parent the method was called, which is totally unexpected. We now make sure that the vmethod from the element that introduced the child property is called whatever parent method is called, making the behaviour more uniform. Fix the python override to make sure that new behaviour is respected.
2020-02-19 18:31:28 +00:00
from gi.repository import GObject
bindings: Start implementing overrides for python
2012-09-13 23:05:45 +00:00
python: Fix GES.Timelineset_child_property Implementing it in the overrides as PyGObject won't be able to properly convert python values to GValues in some cases. Using g_object_set_property works as some logic is implemented inside PyGObject for that particular case. This is a "regression" due to https://bugzilla.gnome.org/review?bug=769789&attachment=348766 were we end up with an OverflowError while setting G_TYPE_UINT children properties.
2018-07-08 14:36:36 +00:00
bindings: Start implementing overrides for python
2012-09-13 23:05:45 +00:00
if sys.version_info >= (3, 0):
_basestring = str
_callable = lambda c: hasattr(c, '__call__')
else:
_basestring = basestring
_callable = callable
GES = modules['GES']._introspection_module
__all__ = []
if GES._version == '0.10':
import warnings
warn_msg = "You have imported the GES 0.10 module. Because GES 0.10 \
was not designed for use with introspection some of the \
interfaces and API will fail. As such this is not supported \
by the GStreamer development team and we encourage you to \
port your app to GES 1 or greater. static python bindings is the recomended \
python module to use with GES 0.10"
warnings.warn(warn_msg, RuntimeWarning)
python: Cleanup overrides using monkey patching Following the PyGObject guidelines[0], this starts monkey patching overridden elements instead of subclassing them. [0]: https://pygobject.readthedocs.io/en/latest/devguide/override_guidelines.html#python-override-guidelines
2020-03-03 21:07:32 +00:00
def __timeline_element__repr__(self):
return "%s [%s (%s) %s]" % (
self.props.name,
Gst.TIME_ARGS(self.props.start),
Gst.TIME_ARGS(self.props.in_point),
Gst.TIME_ARGS(self.props.duration),
)
python: Implement TimelineElement.__repr__
2019-02-11 23:30:31 +00:00
python: Cleanup overrides using monkey patching Following the PyGObject guidelines[0], this starts monkey patching overridden elements instead of subclassing them. [0]: https://pygobject.readthedocs.io/en/latest/devguide/override_guidelines.html#python-override-guidelines
2020-03-03 21:07:32 +00:00
__prev_set_child_property = GES.TimelineElement.set_child_property
def __timeline_element_set_child_property(self, prop_name, prop_value):
res, _, pspec = GES.TimelineElement.lookup_child(self, prop_name)
if not res:
return res
python: Fix GES.Timelineset_child_property Implementing it in the overrides as PyGObject won't be able to properly convert python values to GValues in some cases. Using g_object_set_property works as some logic is implemented inside PyGObject for that particular case. This is a "regression" due to https://bugzilla.gnome.org/review?bug=769789&attachment=348766 were we end up with an OverflowError while setting G_TYPE_UINT children properties.
2018-07-08 14:36:36 +00:00
python: Cleanup overrides using monkey patching Following the PyGObject guidelines[0], this starts monkey patching overridden elements instead of subclassing them. [0]: https://pygobject.readthedocs.io/en/latest/devguide/override_guidelines.html#python-override-guidelines
2020-03-03 21:07:32 +00:00
v = GObject.Value()
v.init(pspec.value_type)
v.set_value(prop_value)
ges: Call the right ->set_child_property vmethod We used to always call the `->set_child_property` virtual method of the object that `ges_timeline_element_set_child_property` was called from, but that means that, in the case of referencing GESContainer children properties from its children, the children wouldn't know what child property have been set, and the children override wouldn't be takent into account, in turns, it means that the behaviour could be different in the setter depending on parent the method was called, which is totally unexpected. We now make sure that the vmethod from the element that introduced the child property is called whatever parent method is called, making the behaviour more uniform. Fix the python override to make sure that new behaviour is respected.
2020-02-19 18:31:28 +00:00
python: Cleanup overrides using monkey patching Following the PyGObject guidelines[0], this starts monkey patching overridden elements instead of subclassing them. [0]: https://pygobject.readthedocs.io/en/latest/devguide/override_guidelines.html#python-override-guidelines
2020-03-03 21:07:32 +00:00
return __prev_set_child_property(self, prop_name, v)
python: Fix GES.Timelineset_child_property Implementing it in the overrides as PyGObject won't be able to properly convert python values to GValues in some cases. Using g_object_set_property works as some logic is implemented inside PyGObject for that particular case. This is a "regression" due to https://bugzilla.gnome.org/review?bug=769789&attachment=348766 were we end up with an OverflowError while setting G_TYPE_UINT children properties.
2018-07-08 14:36:36 +00:00
python: Cleanup overrides using monkey patching Following the PyGObject guidelines[0], this starts monkey patching overridden elements instead of subclassing them. [0]: https://pygobject.readthedocs.io/en/latest/devguide/override_guidelines.html#python-override-guidelines
2020-03-03 21:07:32 +00:00
GES.TimelineElement.__repr__ = __timeline_element__repr__
GES.TimelineElement.set_child_property = __timeline_element_set_child_property
GES.TrackElement.set_child_property = GES.TimelineElement.set_child_property
GES.Container.edit = GES.TimelineElement.edit
python: Fix GES.Timelineset_child_property Implementing it in the overrides as PyGObject won't be able to properly convert python values to GValues in some cases. Using g_object_set_property works as some logic is implemented inside PyGObject for that particular case. This is a "regression" due to https://bugzilla.gnome.org/review?bug=769789&attachment=348766 were we end up with an OverflowError while setting G_TYPE_UINT children properties.
2018-07-08 14:36:36 +00:00
ges: Rework the way we ensure core elements are not wrongly moved between clips Instead of focusing on the instances of the clips and their children, we relax the check to allow moving track element clip between clips that share a common asset. This makes it as correct conceptually but more flexible, and the code becomes simpler.
2020-04-07 14:47:07 +00:00
__prev_asset_repr = GES.Asset.__repr__
python: Cleanup overrides using monkey patching Following the PyGObject guidelines[0], this starts monkey patching overridden elements instead of subclassing them. [0]: https://pygobject.readthedocs.io/en/latest/devguide/override_guidelines.html#python-override-guidelines
2020-03-03 21:07:32 +00:00
def __asset__repr__(self):
ges: Rework the way we ensure core elements are not wrongly moved between clips Instead of focusing on the instances of the clips and their children, we relax the check to allow moving track element clip between clips that share a common asset. This makes it as correct conceptually but more flexible, and the code becomes simpler.
2020-04-07 14:47:07 +00:00
return "%s(%s)" % (__prev_asset_repr(self), self.props.id)
overrides: Make sure overrides are in hierarchy order Otherwise method order resolution will not be correct
2019-05-23 21:20:56 +00:00
python: Cleanup overrides using monkey patching Following the PyGObject guidelines[0], this starts monkey patching overridden elements instead of subclassing them. [0]: https://pygobject.readthedocs.io/en/latest/devguide/override_guidelines.html#python-override-guidelines
2020-03-03 21:07:32 +00:00
GES.Asset.__repr__ = __asset__repr__
overrides: Make sure overrides are in hierarchy order Otherwise method order resolution will not be correct
2019-05-23 21:20:56 +00:00
python: Cleanup overrides using monkey patching Following the PyGObject guidelines[0], this starts monkey patching overridden elements instead of subclassing them. [0]: https://pygobject.readthedocs.io/en/latest/devguide/override_guidelines.html#python-override-guidelines
2020-03-03 21:07:32 +00:00
def __timeline_iter_clips(self):
"""Iterate all clips in a timeline"""
for layer in self.get_layers():
for clip in layer.get_clips():
yield clip
overrides: Make sure overrides are in hierarchy order Otherwise method order resolution will not be correct
2019-05-23 21:20:56 +00:00
python: Cleanup overrides using monkey patching Following the PyGObject guidelines[0], this starts monkey patching overridden elements instead of subclassing them. [0]: https://pygobject.readthedocs.io/en/latest/devguide/override_guidelines.html#python-override-guidelines
2020-03-03 21:07:32 +00:00
GES.Timeline.iter_clips = __timeline_iter_clips
python: Add a Timeline.iter_clips() helper to iterate clips
2020-03-02 22:06:17 +00:00
bindings: Start implementing overrides for python
2012-09-13 23:05:45 +00:00
try:
from gi.repository import Gst
Gst
except:
raise RuntimeError("GSt couldn't be imported, make sure you have gst-python installed")
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