Source Code for Module common.multimedia_helpers

  1  ## 
  2  ## Copyright (C) 2009 Thibaut GIRKA <thib AT sitedethib.com> 
  3  ## 
  4  ## This program is free software; you can redistribute it and/or modify 
  5  ## it under the terms of the GNU General Public License as published 
  6  ## by the Free Software Foundation; version 2 only. 
  7  ## 
  8  ## This program is distributed in the hope that it will be useful, 
  9  ## but WITHOUT ANY WARRANTY; without even the implied warranty of 
 10  ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 11  ## GNU General Public License for more details. 
 12  ## 
 13   
 14  import gst 
 15   
 16   
 17 -class DeviceManager(object): 
 18 -    def __init__(self): 
 19          self.devices = {} 
 20   
 21 -    def detect(self): 
 22          self.devices = {} 
 23   
 24 -    def get_devices(self): 
 25          if not self.devices: 
 26              self.detect() 
 27          return self.devices 
 28   
 29 -    def detect_element(self, name, text, pipe='%s'): 
 30          try: 
 31              element = gst.element_factory_make(name, '%spresencetest' % name) 
 32              if isinstance(element, gst.interfaces.PropertyProbe): 
 33                  element.set_state(gst.STATE_READY) 
 34                  element.probe_property_name('device') 
 35                  devices = element.probe_get_values_name('device') 
 36                  if devices: 
 37                      self.devices[text % _(' Default device')] = pipe % name 
 38                      for device in devices: 
 39                          element.set_state(gst.STATE_NULL) 
 40                          element.set_property('device', device) 
 41                          element.set_state(gst.STATE_READY) 
 42                          device_name = element.get_property('device-name') 
 43                          self.devices[text % device_name] = pipe % '%s device=%s' % (name, device) 
 44                  element.set_state(gst.STATE_NULL) 
 45              else: 
 46                  self.devices[text] = pipe % name 
 47          except gst.ElementNotFoundError: 
 48              print 'element \'%s\' not found' % name 
 49   
 50   
 51 -class AudioInputManager(DeviceManager): 
 52 -    def detect(self): 
 53          self.devices = {} 
 54          # Test src 
 55          self.detect_element('audiotestsrc', _('Audio test'), 
 56                  '%s is-live=true name=gajim_vol') 
 57          # Auto src 
 58          self.detect_element('autoaudiosrc', _('Autodetect'), 
 59                  '%s ! volume name=gajim_vol') 
 60          # Alsa src 
 61          self.detect_element('alsasrc', _('ALSA: %s'), 
 62                  '%s ! volume name=gajim_vol') 
 63   
 64   
 65 -class AudioOutputManager(DeviceManager): 
 66 -    def detect(self): 
 67          self.devices = {} 
 68          # Fake sink 
 69          self.detect_element('fakesink', _('Fake audio output')) 
 70          # Auto sink 
 71          self.detect_element('autoaudiosink', _('Autodetect')) 
 72          # Alsa sink 
 73          self.detect_element('alsasink', _('ALSA: %s'), 
 74                  '%s sync=false') 
 75   
 76   
 77 -class VideoInputManager(DeviceManager): 
 78 -    def detect(self): 
 79          self.devices = {} 
 80          # Test src 
 81          self.detect_element('videotestsrc', _('Video test'), 
 82                  '%s is-live=true ! video/x-raw-yuv,framerate=10/1') 
 83          # Auto src 
 84          self.detect_element('autovideosrc', _('Autodetect')) 
 85          # V4L2 src 
 86          self.detect_element('v4l2src', _('V4L2: %s')) 
 87          # Funny things, just to test... 
 88          # self.devices['GOOM'] = 'audiotestsrc ! goom' 
 89          # self.devices['screen'] = 'ximagesrc' 
 90   
 91   
 92 -class VideoOutputManager(DeviceManager): 
 93 -    def detect(self): 
 94          self.devices = {} 
 95          # Fake video output 
 96          self.detect_element('fakesink', _('Fake audio output')) 
 97          # Auto sink 
 98          self.detect_element('xvimagesink', _('X Window System (X11/XShm/Xv): %s')) 
 99          # ximagesink 
100          self.detect_element('ximagesink', _('X Window System (without Xv)')) 
101          self.detect_element('autovideosink', _('Autodetect')) 
102