Package flumotion :: Package component :: Package encoders :: Package theora :: Module wizard_gtk
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Source Code for Module flumotion.component.encoders.theora.wizard_gtk

  1  # -*- Mode: Python -*- 
  2  # vi:si:et:sw=4:sts=4:ts=4 
  3  # 
  4  # Flumotion - a streaming media server 
  5  # Copyright (C) 2004,2005,2006,2007,2008 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 gettext 
 23  import os 
 24   
 25  from zope.interface import implements 
 26   
 27  from flumotion.common.fraction import fractionAsFloat 
 28  from flumotion.wizard.basesteps import VideoEncoderStep 
 29  from flumotion.wizard.interfaces import IEncoderPlugin 
 30  from flumotion.wizard.models import VideoEncoder 
 31   
 32  __version__ = "$Rev: 6775 $" 
 33  _ = gettext.gettext 
 34   
 35   
36 -class TheoraVideoEncoder(VideoEncoder):
37 """ 38 @ivar framerate: number of frames per second; to be set by view 39 @type framerate: float 40 """ 41 componentType = 'theora-encoder' 42
43 - def __init__(self):
44 super(TheoraVideoEncoder, self).__init__() 45 self.has_quality = True 46 self.has_bitrate = False 47 self.framerate = 25.0 48 49 self.properties.noise_sensitivity = 0 50 self.properties.keyframe_delta = 2.0 51 self.properties.bitrate = 400 52 self.properties.quality = 16 53 self.properties.sharpness = 0
54
55 - def getProperties(self):
56 properties = super(TheoraVideoEncoder, self).getProperties() 57 if self.has_bitrate: 58 del properties.quality 59 properties.bitrate *= 1000 60 elif self.has_quality: 61 del properties.bitrate 62 else: 63 raise AssertionError 64 65 properties.noise_sensitivity = max( 66 int(properties.noise_sensitivity * (32768 / 100.)), 1) 67 68 # convert the human-friendly delta to maxdistance 69 # FIXME: I think the theora-encoder component should not expose 70 # the theora element properties directly, but just have keyframe-delta 71 # directly and calculate GStreamer element properties. But that's a 72 # property change. 73 properties.keyframe_maxdistance = int(properties.keyframe_delta * 74 self.framerate) 75 del properties.keyframe_delta 76 77 self.debug('keyframe_maxdistance: %r', 78 properties.keyframe_maxdistance) 79 80 return properties
81 82
83 -class TheoraStep(VideoEncoderStep):
84 name = 'TheoraEncoder' 85 title = _('Theora encoder') 86 sidebarName = _('Theora') 87 gladeFile = os.path.join(os.path.dirname(os.path.abspath(__file__)), 88 'wizard.glade') 89 componentType = 'theora' 90 icon = 'xiphfish.png' 91 92 # WizardStep 93
94 - def setup(self):
95 self.bitrate.data_type = int 96 self.quality.data_type = int 97 self.noise_sensitivity.data_type = int 98 self.keyframe_delta.data_type = float 99 self.sharpness.data_type = int 100 self.has_quality.data_type = bool 101 self.has_bitrate.data_type = bool 102 103 self.add_proxy(self.model, 104 ['has_quality', 'has_bitrate']) 105 self.add_proxy(self.model.properties, 106 ['bitrate', 'quality', 'keyframe_delta', 107 'noise_sensitivity', 'sharpness']) 108 109 # we specify keyframe_delta in seconds, but theora expects 110 # a number of frames, so we need the framerate and calculate 111 # we need to go through the Step (which is the view) because models 112 # don't have references to other models 113 producer = self.wizard.getVideoProducer() 114 self.model.framerate = fractionAsFloat(producer.getFramerate()) 115 self.debug('Framerate of video producer: %r' % self.model.framerate) 116 step = 1 / self.model.framerate 117 page = 1.0 118 self.keyframe_delta.set_increments(step, page)
119
120 - def workerChanged(self, worker):
121 self.model.worker = worker 122 123 def hasTheora(unused, worker): 124 self.wizard.runInWorker( 125 worker, 'flumotion.worker.checks.encoder', 'checkTheora')
126 127 self.wizard.debug('running Theora checks') 128 d = self.wizard.requireElements(worker, 'theoraenc') 129 d.addCallback(hasTheora, worker)
130 131 # Callbacks 132
133 - def on_radiobutton_toggled(self, button):
134 # This is bound to both radiobutton_bitrate and radiobutton_quality 135 self.bitrate.set_sensitive(self.has_bitrate.get_active()) 136 self.quality.set_sensitive(self.has_quality.get_active())
137 138
139 -class TheoraWizardPlugin(object):
140 implements(IEncoderPlugin)
141 - def __init__(self, wizard):
142 self.wizard = wizard 143 self.model = TheoraVideoEncoder()
144
145 - def getConversionStep(self):
146 return TheoraStep(self.wizard, self.model)
147