Source Code for Module flumotion.component.misc.repeater.repeater

 1  # -*- Mode: Python -*- 
 2  # vi:si:et:sw=4:sts=4:ts=4 
 3  # 
 4  # Flumotion - a streaming media server 
 5  # Copyright (C) 2004,2005,2006,2007 Fluendo, S.L. (www.fluendo.com). 
 6  # All rights reserved. 
 7   
 8  # This file may be distributed and/or modified under the terms of 
 9  # the GNU General Public License version 2 as published by 
10  # the Free Software Foundation. 
11  # This file is distributed without any warranty; without even the implied 
12  # warranty of merchantability or fitness for a particular purpose. 
13  # See "LICENSE.GPL" in the source distribution for more information. 
14   
15  # Licensees having purchased or holding a valid Flumotion Advanced 
16  # Streaming Server license may use this file in accordance with the 
17  # Flumotion Advanced Streaming Server Commercial License Agreement. 
18  # See "LICENSE.Flumotion" in the source distribution for more information. 
19   
20  # Headers in this file shall remain intact. 
21   
22  from flumotion.common import gstreamer, messages, errors 
23  from flumotion.component import feedcomponent 
24   
25  from flumotion.common.messages import N_ 
26  T_ = messages.gettexter('flumotion') 
27   
28 -class Repeater(feedcomponent.ParseLaunchComponent): 
29 -    def get_pipeline_string(self, properties): 
30          dp = "" 
31          if 'drop-probability' in properties: 
32              vt = gstreamer.get_plugin_version('coreelements') 
33              if not vt: 
34                  raise errors.MissingElementError('identity') 
35              if not vt > (0, 10, 12, 0): 
36                  self.addMessage( 
37                      messages.Warning(T_(N_( 
38                          "The 'drop-probability' property is specified, but " 
39                          "it only works with GStreamer core newer than 0.10.12. " 
40                          "You should update your version of GStreamer.")))) 
41              else: 
42                  drop_probability = properties['drop-probability'] 
43                  if drop_probability < 0.0 or drop_probability > 1.0: 
44                      self.addMessage( 
45                          messages.Warning(T_(N_( 
46                              "The 'drop-probability' property can only be " 
47                              "between 0.0 and 1.0.")))) 
48                  else: 
49                      dp = " drop-probability=%f" % drop_probability 
50   
51          return 'identity silent=true %s' % dp 
52