def getOrbPosFromNit(self, currentProcess):
if self.DVB_type.value != "DVB-S" or not dvbreader_available or self.frontend is None or self.demux < 0:
return
adapter = 0
demuxer_device = "/dev/dvb/adapter%d/demux%d" % (adapter, self.demux)
nit_current_pid = 0x10
nit_current_table_id = 0x40
nit_other_table_id = 0x00 # don't read other table
if nit_other_table_id == 0x00:
mask = 0xff
else:
mask = nit_current_table_id ^ nit_other_table_id ^ 0xff
nit_current_timeout = 60 # maximum time allowed to read the network information table (seconds)
nit_current_version_number = -1
nit_current_sections_read = []
nit_current_sections_count = 0
nit_current_content = []
nit_current_completed = False
fd = dvbreader.open(demuxer_device, nit_current_pid, nit_current_table_id, mask, self.feid)
if fd < 0:
print "[Satfinder][getOrbPosFromNit] Cannot open the demuxer"
return
timeout = datetime.datetime.now()
timeout += datetime.timedelta(0, nit_current_timeout)
while True:
if datetime.datetime.now() > timeout:
print "[Satfinder][getOrbPosFromNit] Timed out reading NIT"
break
if self.currentProcess != currentProcess or not self.tunerLock():
dvbreader.close(fd)
return
section = dvbreader.read_nit(fd, nit_current_table_id, nit_other_table_id)
if section is None:
time.sleep(0.1) # no data.. so we wait a bit
continue
if section["header"]["table_id"] == nit_current_table_id and not nit_current_completed:
if section["header"]["version_number"] != nit_current_version_number:
nit_current_version_number = section["header"]["version_number"]
nit_current_sections_read = []
nit_current_sections_count = section["header"]["last_section_number"] + 1
nit_current_content = []
if section["header"]["section_number"] not in nit_current_sections_read:
nit_current_sections_read.append(section["header"]["section_number"])
nit_current_content += section["content"]
if len(nit_current_sections_read) == nit_current_sections_count:
nit_current_completed = True
if nit_current_completed:
break
dvbreader.close(fd)
if not nit_current_content:
print "[Satfinder][getOrbPosFromNit] current transponder not found"
return
transponders = [t for t in nit_current_content if "descriptor_tag" in t and t["descriptor_tag"] == 0x43 and t["original_network_id"] == self.onid and t["transport_stream_id"] == self.tsid]
transponders2 = [t for t in nit_current_content if "descriptor_tag" in t and t["descriptor_tag"] == 0x43 and t["transport_stream_id"] == self.tsid]
if transponders and "orbital_position" in transponders[0]:
orb_pos = self.getOrbitalPosition(transponders[0]["orbital_position"], transponders[0]["west_east_flag"])
self["pos"].setText(_("%s") % orb_pos)
print "[satfinder][getOrbPosFromNit] orb_pos", orb_pos
elif transponders2 and "orbital_position" in transponders2[0]:
orb_pos = self.getOrbitalPosition(transponders2[0]["orbital_position"], transponders2[0]["west_east_flag"])
self["pos"].setText(_("%s?") % orb_pos)
print "[satfinder][getOrbPosFromNit] orb_pos tentative, tsid match, onid mismatch between NIT and SDT", orb_pos
else:
print "[satfinder][getOrbPosFromNit] no orbital position found"
def getOrbPosFromNit(self, currentProcess):
if not dvbreader_available:
return
print "[Satfinder][getOrbPosFromNit] starting"
if self.demux < 0:
print "[Satfinder][getOrbPosFromNit] Demux not allocated"
return
self.orb_pos = ''
adapter = 0
demuxer_device = "/dev/dvb/adapter%d/demux%d" % (adapter, self.demux)
nit_current_pid = 0x10
nit_current_table_id = 0x40
nit_other_table_id = 0x00 # don't read other table
if nit_other_table_id == 0x00:
mask = 0xff
else:
mask = nit_current_table_id ^ nit_other_table_id ^ 0xff
nit_current_timeout = 60 # time allowed to get table data
nit_current_version_number = -1
nit_current_sections_read = []
nit_current_sections_count = 0
nit_current_content = []
nit_current_completed = False
fd = dvbreader.open(demuxer_device, nit_current_pid,
nit_current_table_id, mask, self.feid)
if fd < 0:
print "[Satfinder][getOrbPosFromNit] Cannot open the demuxer"
return
timeout = datetime.datetime.now()
timeout += datetime.timedelta(0, nit_current_timeout)
while True:
if datetime.datetime.now() > timeout:
print "[Satfinder][getOrbPosFromNit] Timed out reading NIT"
break
if self.currentProcess != currentProcess:
print "[satfinder][getOrbPosFromNit] killed: %s, currentProcess: %s" % (
currentProcess, self.currentProcess)
dvbreader.close(fd)
return
section = dvbreader.read_nit(fd, nit_current_table_id,
nit_other_table_id)
if section is None:
time.sleep(0.1) # no data.. so we wait a bit
continue
if section["header"][
"table_id"] == nit_current_table_id and not nit_current_completed:
if section["header"][
"version_number"] != nit_current_version_number:
nit_current_version_number = section["header"][
"version_number"]
nit_current_sections_read = []
nit_current_sections_count = section["header"][
"last_section_number"] + 1
nit_current_content = []
if section["header"][
"section_number"] not in nit_current_sections_read:
nit_current_sections_read.append(
section["header"]["section_number"])
nit_current_content += section["content"]
if len(nit_current_sections_read
) == nit_current_sections_count:
nit_current_completed = True
if nit_current_completed:
break
dvbreader.close(fd)
if not nit_current_content:
print "[Satfinder][getOrbPosFromNit] current transponder not found"
return
transponders = [
t for t in nit_current_content
if "descriptor_tag" in t and t["descriptor_tag"] == 0x43
and t["original_network_id"] == self.onid
and t["transport_stream_id"] == self.tsid
]
if transponders and "orbital_position" in transponders[0]:
self.orb_pos = self.getOrbitalPosition(
transponders[0]["orbital_position"],
transponders[0]["west_east_flag"])
print "[satfinder][getOrbPosFromNit] self.orb_pos", self.orb_pos
else:
print "[satfinder][getOrbPosFromNit] no orbital position found"