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#!/usr/bin/python
# coding=UTF-8
#
# Copyright (C) 2008 Tim-Philipp Müller <tim.muller@collabora.co.uk>
# Copyright (C) 2008 Canonical Ltd.
#
# 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 2 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# The Totem project hereby grant permission for non-gpl compatible GStreamer
# plugins to be used and distributed together with GStreamer and Totem. This
# permission are above and beyond the permissions granted by the GPL license
# Totem is covered by.
#
# See license_change file for details.
import gobject
gobject.threads_init()
import pygst
pygst.require ("0.10")
import gst
import os
def allPackagesAvailableApt(package_descs, codec_name, apt_cache):
toinstall = ''
allinstalled = True
for pkg_desc in package_descs:
(component, pkg_name) = pkg_desc.split('/')
if apt_cache.has_key(pkg_name):
package = apt_cache[pkg_name]
# we only care about installable ones here, not installed, since
# the installed ones we can better check via the registry (also
# taking into account element factory ranks etc.)
gst.log('%s: package %s: installed=%d, downloadable=%d' % (codec_name, pkg_name,
package.isInstalled,
package.candidateDownloadable))
if not package.isInstalled:
allinstalled = False
if not package.candidateDownloadable:
gst.log('%s: not available (package %s not downloadable)' % (codec_name, pkg_name))
return False
elif toinstall.find(pkg_name) < 0:
toinstall += pkg_name + ' '
# if all candidat packages are already installed, things should
# be checked via the registry and there's nothing to be gained
# here, so pretend the codec is not available for installation
# in this case
if allinstalled:
gst.debug('%s: not available (all already installed)' % (codec_name))
return False
else:
gst.debug('%s: available (install %s)' % (codec_name, toinstall[:-1]))
return True
def getInstallableCodecsUbuntu():
import warnings
warnings.filterwarnings("ignore", "apt API not stable yet", FutureWarning)
import apt
import gdbm
codecs = []
try:
apt_cache = apt.Cache()
except:
gst.warning('Failed to read APT cache')
return []
try:
codec_map = gdbm.open('/var/cache/app-install/gai-codec-map.gdbm')
for key in codec_map.keys():
if not key.startswith('0.10:decoder-'):
continue
codec_name = key[13:]
if allPackagesAvailableApt(codec_map[key].split(), codec_name, apt_cache):
codecs.append(codec_name)
except gdbm.error:
gst.warning('gdbm error')
return []
return codecs
def getInstallableCodecs():
codecs = []
if os.access('/var/cache/app-install/gai-codec-map.gdbm', os.R_OK):
codecs = getInstallableCodecsUbuntu()
return codecs
if __name__ == "__main__":
codecs = getInstallableCodecs()
if len(codecs) > 0:
for codec in codecs:
print "installable: %s" % (codec)
else:
print 'No codecs known to be installable'
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