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from Components.Converter.Converter import Converter
from Components.Element import cached
class FrontendInfo(Converter, object):
BER = 0
SNR = 1
AGC = 2
LOCK = 3
SNRdB = 4
SLOT_NUMBER = 5
TUNER_TYPE = 6
def __init__(self, type):
Converter.__init__(self, type)
if type == "BER":
self.type = self.BER
elif type == "SNR":
self.type = self.SNR
elif type == "SNRdB":
self.type = self.SNRdB
elif type == "AGC":
self.type = self.AGC
elif type == "NUMBER":
self.type = self.SLOT_NUMBER
elif type == "TYPE":
self.type = self.TUNER_TYPE
else:
self.type = self.LOCK
@cached
def getText(self):
assert self.type not in (self.LOCK, self.SLOT_NUMBER), "the text output of FrontendInfo cannot be used for lock info"
percent = None
if self.type == self.BER: # as count
count = self.source.ber
if count is not None:
return str(count)
else:
return "N/A"
elif self.type == self.AGC:
percent = self.source.agc
elif self.type == self.SNR:
percent = self.source.snr
elif self.type == self.SNRdB:
if self.source.snr_db is not None:
return "%3.02f dB" % (self.source.snr_db / 100.0)
elif self.source.snr is not None: #fallback to normal SNR...
percent = self.source.snr
elif self.type == self.TUNER_TYPE:
return self.source.frontend_type and self.frontend_type or "Unknown"
if percent is None:
return "N/A"
return "%d %%" % (percent * 100 / 65536)
@cached
def getBool(self):
assert self.type in (self.LOCK, self.BER), "the boolean output of FrontendInfo can only be used for lock or BER info"
if self.type == self.LOCK:
lock = self.source.lock
if lock is None:
lock = False
return lock
else:
ber = self.source.ber
if ber is None:
ber = 0
return ber > 0
text = property(getText)
boolean = property(getBool)
@cached
def getValue(self):
assert self.type != self.LOCK, "the value/range output of FrontendInfo can not be used for lock info"
if self.type == self.AGC:
return self.source.agc or 0
elif self.type == self.SNR:
return self.source.snr or 0
elif self.type == self.BER:
if self.BER < self.range:
return self.BER or 0
else:
return self.range
elif self.type == self.TUNER_TYPE:
type = self.source.frontend_type
if type == 'DVB-S':
return 0
elif type == 'DVB-C':
return 1
elif type == 'DVB-T':
return 2
return -1
elif self.type == self.SLOT_NUMBER:
num = self.source.slot_number
return num is None and -1 or num
range = 65536
value = property(getValue)
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