lib/python/Components/Converter/FrontendInfo.py

   1 from Components.Converter.Converter import Converter
   2 from Components.Element import cached
   3
   4 class FrontendInfo(Converter, object):
   5         BER = 0
   6         SNR = 1
   7         AGC = 2
   8         LOCK = 3
   9
  10         def __init__(self, type):
  11                 Converter.__init__(self, type)
  12                 if type == "BER":
  13                         self.type = self.BER
  14                 elif type == "SNR":
  15                         self.type = self.SNR
  16                 elif type == "AGC":
  17                         self.type = self.AGC
  18                 else:
  19                         self.type = self.LOCK
  20
  21         @cached
  22         def getText(self):
  23                 assert self.type != self.LOCK, "the text output of FrontendInfo cannot be used for lock info"
  24                 if self.type == self.BER: # as count
  25                         count = self.source.ber
  26                         if count is not None:
  27                                 return str(count)
  28                         else:
  29                                 return "N/A"
  30                 elif self.type == self.AGC:
  31                         percent = self.source.agc
  32                 elif self.type == self.SNR:
  33                         percent = self.source.snr
  34
  35                 if percent is None:
  36                         return "N/A"
  37
  38                 return "%d %%" % (percent * 100 / 65536)
  39
  40         @cached
  41         def getBool(self):
  42                 assert self.type in [self.LOCK, self.BER], "the boolean output of FrontendInfo can only be used for lock or BER info"
  43                 if self.type == self.LOCK:
  44                         return self.source.lock
  45                 else:
  46                         return self.source.ber > 0
  47
  48         text = property(getText)
  49
  50         boolean = property(getBool)
  51
  52         @cached
  53         def getValue(self):
  54                 assert self.type != self.LOCK, "the value/range output of FrontendInfo can not be used for lock info"
  55                 if self.type == self.AGC:
  56                         return self.source.agc or 0
  57                 elif self.type == self.SNR:
  58                         return self.source.snr or 0
  59                 elif self.type == self.BER:
  60                         if self.BER < self.range:
  61                                 return self.BER or 0
  62                         else:
  63                                 return self.range
  64
  65         range = 65536
  66         value = property(getValue)