Source Code for Module flumotion.component.converters.overlay.overlay

  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 os 
 23  import tempfile 
 24   
 25  from twisted.internet import defer 
 26   
 27  from flumotion.common import log, messages, gstreamer 
 28  from flumotion.common.i18n import N_, gettexter 
 29  from flumotion.component import feedcomponent 
 30  from flumotion.component.converters.overlay import genimg 
 31   
 32  __version__ = "$Rev: 6969 $" 
 33  T_ = gettexter() 
 34   
 35   
 36 -class Overlay(feedcomponent.ParseLaunchComponent): 
 37      checkTimestamp = True 
 38      checkOffset = True 
 39      _filename = None 
 40   
 41 -    def get_pipeline_string(self, properties): 
 42          # the order here is important; to have our eater be the reference 
 43          # stream for videomixer it needs to be specified last 
 44          pipeline = ( 
 45              'filesrc name=source blocksize=100000 ! pngdec ! alphacolor ! ' 
 46              'videomixer name=mix ! @feeder:default@ ' 
 47              '@eater:default@ ! ffmpegcolorspace ! mix.') 
 48   
 49          return pipeline 
 50   
 51 -    def configure_pipeline(self, pipeline, properties): 
 52          p = properties 
 53          self.fixRenamedProperties(p, [ 
 54                  ('show_text',    'show-text'), 
 55                  ('fluendo_logo', 'fluendo-logo'), 
 56                  ('cc_logo',      'cc-logo'), 
 57                  ('xiph_logo',    'xiph-logo') 
 58              ]) 
 59   
 60          # create temp file 
 61          (fd, self._filename) = tempfile.mkstemp('flumotion.png') 
 62          os.close(fd) 
 63   
 64          text = None 
 65          if p.get('show-text', False): 
 66              text = p.get('text', 'set the "text" property') 
 67          overflow = genimg.generate_overlay(self._filename, 
 68                                             text, 
 69                                             p.get('fluendo-logo', False), 
 70                                             p.get('cc-logo', False), 
 71                                             p.get('xiph-logo', False), 
 72                                             p['width'], 
 73                                             p['height']) 
 74          if overflow: 
 75              m = messages.Warning( 
 76                  T_(N_("Overlayed text '%s' too wide for the video image."), 
 77                     text), id = "text-too-wide") 
 78              self.addMessage(m) 
 79   
 80          source = self.get_element('source') 
 81          source.set_property('location', self._filename) 
 82   
 83          if gstreamer.get_plugin_version('videomixer') == (0,10,7,0): 
 84              m = messages.Warning( 
 85                  T_(N_("The 'videomixer' GStreamer element has a bug in this " 
 86                        "version (0.10.7). You may see many errors in the debug " 
 87                        "output, but it should work correctly anyway.")), 
 88                  id = "videomixer-bug") 
 89              self.addMessage(m) 
 90   
 91 -    def do_stop(self): 
 92          # clean up our temp file 
 93          if self._filename: 
 94              self.debug('Removing temporary overlay file %s' % self._filename) 
 95              os.unlink(self._filename) 
 96              self._filename = None 
 97          else: 
 98              self.debug("Temporary overlay already gone, " \ 
 99                  "did we not start up correctly ?") 
100