Source Code for Module flumotion.component.producers.videotest.videotest

  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  import gst 
 23   
 24  from flumotion.common import errors, gstreamer, messages 
 25  from flumotion.common.i18n import N_, gettexter 
 26  from flumotion.component import feedcomponent 
 27   
 28  __version__ = "$Rev: 6695 $" 
 29  T_ = gettexter() 
 30   
 31   
 32 -class VideoTestMedium(feedcomponent.FeedComponentMedium): 
 33 -    def remote_setPattern(self, pattern): 
 34          return self.comp.set_element_property('source', 'pattern', 
 35                                                pattern) 
 36   
 37 -class VideoTest(feedcomponent.ParseLaunchComponent): 
 38      componentMediumClass = VideoTestMedium 
 39   
 40 -    def init(self): 
 41          self.uiState.addKey('pattern', 0) 
 42   
 43 -    def get_pipeline_string(self, properties): 
 44          format = properties.get('format', 'video/x-raw-yuv') 
 45   
 46          if format == 'video/x-raw-yuv': 
 47              format = '%s,format=(fourcc)I420' % format 
 48   
 49          # Filtered caps 
 50          struct = gst.structure_from_string(format) 
 51          for k in 'width', 'height': 
 52              if k in properties: 
 53                  struct[k] = properties[k] 
 54   
 55          if 'framerate' in properties: 
 56              framerate = properties['framerate'] 
 57              struct['framerate'] = gst.Fraction(framerate[0], framerate[1]) 
 58   
 59          # always set par 
 60          struct['pixel-aspect-ratio']= gst.Fraction(1,1) 
 61          if 'pixel-aspect-ratio' in properties: 
 62              par = properties['pixel-aspect-ratio'] 
 63              struct['pixel-aspect-ratio'] = gst.Fraction(par[0], par[1]) 
 64   
 65          # If RGB, set something ffmpegcolorspace can convert. 
 66          if format == 'video/x-raw-rgb': 
 67              struct['red_mask'] = 0xff00 
 68          caps = gst.Caps(struct) 
 69   
 70          is_live = 'is-live=true' 
 71   
 72          overlay = "" 
 73          overlayTimestamps = properties.get('overlay-timestamps', False) 
 74          if overlayTimestamps: 
 75              overlay = " timeoverlay ! " 
 76   
 77          return "videotestsrc %s name=source ! " % is_live + overlay + \ 
 78              "identity name=identity silent=TRUE ! %s" % caps 
 79   
 80      # Set properties 
 81 -    def configure_pipeline(self, pipeline, properties): 
 82          def notify_pattern(obj, pspec): 
 83              self.uiState.set('pattern', int(obj.get_property('pattern'))) 
 84   
 85          source = self.get_element('source') 
 86          source.connect('notify::pattern', notify_pattern) 
 87          if 'pattern' in properties: 
 88              source.set_property('pattern', properties['pattern']) 
 89   
 90          if 'drop-probability' in properties: 
 91              vt = gstreamer.get_plugin_version('coreelements') 
 92              if not vt: 
 93                  raise errors.MissingElementError('identity') 
 94              if not vt > (0, 10, 12, 0): 
 95                  self.addMessage( 
 96                      messages.Warning(T_(N_( 
 97                          "The 'drop-probability' property is specified, but " 
 98                          "it only works with GStreamer core newer than 0.10.12. " 
 99                          "You should update your version of GStreamer.")))) 
100              else: 
101                  drop_probability = properties['drop-probability'] 
102                  if drop_probability < 0.0 or drop_probability > 1.0: 
103                      self.addMessage( 
104                          messages.Warning(T_(N_( 
105                              "The 'drop-probability' property can only be " 
106                              "between 0.0 and 1.0.")))) 
107                  else: 
108                      identity = self.get_element('identity') 
109                      identity.set_property('drop-probability', 
110                          drop_probability) 
111