def tryV4L1(_):
log.debug('webcam', 'trying v4l1')
pipeline = 'v4lsrc name=source device=%s ! fakesink' % (device, )
d = do_element_check(pipeline,
'source',
probeDevice,
state=gst.STATE_PAUSED,
set_state_deferred=True)
return d
def checkDVBVideo(p, mid='check-dvb-video'):
"""
@rtype: L{twisted.internet.defer.Deferred}
"""
result = messages.Result()
def get_dvb_video_params(element):
pad = element.get_pad('src')
if pad.get_negotiated_caps() == None:
raise errors.GStreamerError('Pipeline failed to negotiate?')
caps = pad.get_negotiated_caps()
s = caps[0]
w = s['width']
h = s['height']
par = s['pixel-aspect-ratio']
fr = s['framerate']
result = dict(width=w, height=h, par=(par.num, par.denom),
framerate=(fr.num, fr.denom))
log.debug('check', 'returning dict %r' % result)
return result
if p.get('dvb_type') == "T":
pipeline = ("dvbsrc modulation=\"QAM %(modulation)d\" "
"trans-mode=%(trans_mode)s bandwidth=%(bandwidth)d "
"code-rate-lp=%(code_rate_lp)s "
"code-rate-hp=%(code_rate_hp)s "
"guard=%(guard)d hierarchy=%(hierarchy)d ") % p
elif p.get('dvb_type') == "S":
pipeline = ("dvbsrc polarity=%(polarity)s symbol-rate=%(symbol_rate)s "
"diseqc-source=%(sat)d ") % p
if p.get('code-rate-hp'):
pipeline += " code-rate-hp=%s" % p.get('code_rate_hp')
elif p.get('dvb_type') == "C":
pipeline = ("dvbsrc modulation=\"QAM %(modulation)d\" "
"code-rate-hp=%(code_rate_hp)s ") % p
if p.get('dvb_type') in ["S", "T", "C"]:
pipeline += ("frequency=%d adapter=%d frontend=%d " %
(p.get('frequency'), p.get('adapter'), p.get('frontend')))
pipeline += ("! mpegtsdemux program-number=%d "
"! mpegvideoparse name=parser ! fakesink" %
p.get('program_number'))
log.debug('check', 'Using pipeline: %s', pipeline)
d = do_element_check(pipeline, 'parser', get_dvb_video_params)
d.addCallback(check.callbackResult, result)
return d
def tryV4L2():
log.debug('webcam', 'trying v4l2')
version = gstreamer.get_plugin_version('video4linux2')
minVersion = (0, 10, 5, 1)
if not version or version < minVersion:
log.info('webcam', 'v4l2 version %r too old (need >=%r)',
version, minVersion)
return defer.fail(NotImplementedError())
pipeline = 'v4l2src name=source device=%s ! fakesink' % (device, )
d = do_element_check(pipeline, 'source', probeDevice,
state=gst.STATE_PAUSED, set_state_deferred=True)
return d
def tryV4L2():
log.debug('webcam', 'trying v4l2')
version = gstreamer.get_plugin_version('video4linux2')
minVersion = (0, 10, 5, 1)
if not version or version < minVersion:
log.info('webcam', 'v4l2 version %r too old (need >=%r)', version,
minVersion)
return defer.fail(NotImplementedError())
pipeline = 'v4l2src name=source device=%s ! fakesink' % (device, )
d = do_element_check(pipeline,
'source',
probeDevice,
state=gst.STATE_PAUSED,
set_state_deferred=True)
return d
def checkTVCard(device, mid='check-tvcard'):
"""
Probe the given device node as a TV card.
Return a deferred firing a human-readable device name, a list of channel
names (Tuner/Composite/...), and a list of norms (PAL/NTSC/SECAM/...).
@rtype: L{twisted.internet.defer.Deferred}
"""
result = messages.Result()
def get_name_channels_norms(element):
deviceName = element.get_property('device-name')
channels = [channel.label for channel in element.list_channels()]
norms = [norm.label for norm in element.list_norms()]
return (deviceName, channels, norms)
pipeline = 'v4lsrc name=source device=%s ! fakesink' % device
d = do_element_check(pipeline, 'source', get_name_channels_norms)
d.addCallback(check.callbackResult, result)
d.addErrback(check.errbackNotFoundResult, result, mid, device)
d.addErrback(check.errbackResult, result, mid, device)
return d
def checkTVCard(device, mid='check-tvcard'):
"""
Probe the given device node as a TV card.
Return a deferred firing a human-readable device name, a list of channel
names (Tuner/Composite/...), and a list of norms (PAL/NTSC/SECAM/...).
@rtype: L{twisted.internet.defer.Deferred}
"""
result = messages.Result()
def get_name_channels_norms(element):
deviceName = element.get_property('device-name')
channels = [channel.label for channel in element.list_channels()]
norms = [norm.label for norm in element.list_norms()]
return (deviceName, channels, norms)
pipeline = 'v4lsrc name=source device=%s ! fakesink' % device
d = do_element_check(pipeline, 'source', get_name_channels_norms)
d.addCallback(check.callbackResult, result)
d.addErrback(check.errbackNotFoundResult, result, mid, device)
d.addErrback(check.errbackResult, result, mid, device)
return d
def tryV4L1(_):
log.debug('webcam', 'trying v4l1')
pipeline = 'v4lsrc name=source device=%s ! fakesink' % (device, )
d = do_element_check(pipeline, 'source', probeDevice,
state=gst.STATE_PAUSED, set_state_deferred=True)
return d
