mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-05 09:00:54 +00:00
63 lines
2 KiB
Python
63 lines
2 KiB
Python
# -*- Mode: Python; py-indent-offset: 4 -*-
|
|
# pygst - Python bindings for the GStreamer multimedia framework.
|
|
# Copyright (C) 1998-2002 James Henstridge
|
|
# (C) 2005 Edward Hervey
|
|
#
|
|
# pygst.py: pygst version selection code.
|
|
#
|
|
#
|
|
# This library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Library General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2 of the License, or (at your option) any later version.
|
|
#
|
|
# This library 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
|
|
# Library General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Library General Public
|
|
# License along with this library; if not, write to the
|
|
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
# Boston, MA 02111-1307, USA.
|
|
#
|
|
# This allows parallel installation of gst-python
|
|
#
|
|
# In order to have backward compatibility
|
|
|
|
import sys
|
|
|
|
__all__ = ['require']
|
|
|
|
_pygst_dir = '@PYGSTDIR@'
|
|
|
|
_pygst_version = '@GST_MAJORMINOR@'
|
|
|
|
_pygst_required_version = None
|
|
|
|
class RequiredVersionError(ValueError, AssertionError):
|
|
# AssertionError is subclassed for compatibility reasons.
|
|
pass
|
|
|
|
|
|
def require(version):
|
|
global _pygst_required_version
|
|
|
|
if _pygst_required_version != None:
|
|
if _pygst_required_version != version:
|
|
raise RequiredVersionError, "a different version of gst was already required"
|
|
else:
|
|
return
|
|
|
|
if sys.modules.has_key('gst'):
|
|
raise RequiredVersionError, "pygst.require() must be called before importing gst"
|
|
|
|
if version != _pygst_version:
|
|
raise RequiredVersionError, "Only version '%s' is available" % _pygst_version
|
|
|
|
# move the pygst path to the front
|
|
while _pygst_dir in sys.path:
|
|
sys.path.remove(_pygst_dir)
|
|
sys.path.insert(0, _pygst_dir)
|
|
|
|
_pygst_required_version = version
|