src/common/multimedia_helpers.py

   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             if gst.element_factory_find(name):
  32                 element = gst.element_factory_make(name,
  33                     '%spresencetest' % name)
  34                 if isinstance(element, gst.interfaces.PropertyProbe):
  35                     element.set_state(gst.STATE_READY)
  36                     element.probe_property_name('device')
  37                     devices = element.probe_get_values_name('device')
  38                     if devices:
  39                         self.devices[text % _(' Default device')] = pipe % name
  40                         for device in devices:
  41                             element.set_state(gst.STATE_NULL)
  42                             element.set_property('device', device)
  43                             element.set_state(gst.STATE_READY)
  44                             device_name = element.get_property('device-name')
  45                             self.devices[text % device_name] = pipe % \
  46                                 '%s device=%s' % (name, device)
  47                     element.set_state(gst.STATE_NULL)
  48                 else:
  49                     self.devices[text] = pipe % name
  50         except ImportError:
  51             pass
  52         except gst.ElementNotFoundError:
  53             print 'element \'%s\' not found' % name
  54
  55
  56 class AudioInputManager(DeviceManager):
  57     def detect(self):
  58         self.devices = {}
  59         # Test src
  60         self.detect_element('audiotestsrc', _('Audio test'),
  61             '%s is-live=true name=gajim_vol')
  62         # Auto src
  63         self.detect_element('autoaudiosrc', _('Autodetect'),
  64             '%s ! volume name=gajim_vol')
  65         # Alsa src
  66         self.detect_element('alsasrc', _('ALSA: %s'),
  67             '%s ! volume name=gajim_vol')
  68         # Pulseaudio src
  69         self.detect_element('pulsesrc', _('Pulse: %s'),
  70             '%s ! volume name=gajim_vol')
  71
  72
  73 class AudioOutputManager(DeviceManager):
  74     def detect(self):
  75         self.devices = {}
  76         # Fake sink
  77         self.detect_element('fakesink', _('Fake audio output'))
  78         # Auto sink
  79         self.detect_element('autoaudiosink', _('Autodetect'))
  80         # Alsa sink
  81         self.detect_element('alsasink', _('ALSA: %s'), '%s sync=false')
  82         # Pulseaudio sink
  83         self.detect_element('pulsesink', _('Pulse: %s'), '%s sync=true')
  84
  85
  86 class VideoInputManager(DeviceManager):
  87     def detect(self):
  88         self.devices = {}
  89         # Test src
  90         self.detect_element('videotestsrc', _('Video test'),
  91             '%s is-live=true ! video/x-raw-yuv,framerate=10/1')
  92         # Auto src
  93         self.detect_element('autovideosrc', _('Autodetect'))
  94         # V4L2 src
  95         self.detect_element('v4l2src', _('V4L2: %s'))
  96         # Funny things, just to test...
  97         # self.devices['GOOM'] = 'audiotestsrc ! goom'
  98         # self.devices['screen'] = 'ximagesrc'
  99
 100
 101 class VideoOutputManager(DeviceManager):
 102     def detect(self):
 103         self.devices = {}
 104         # Fake video output
 105         self.detect_element('fakesink', _('Fake audio output'))
 106         # Auto sink
 107         self.detect_element('xvimagesink',
 108             _('X Window System (X11/XShm/Xv): %s'))
 109         # ximagesink
 110         self.detect_element('ximagesink', _('X Window System (without Xv)'))
 111         self.detect_element('autovideosink', _('Autodetect'))
 112