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         SNRdB = 4
  10         SLOT_NUMBER = 5
  11         TUNER_TYPE = 6
  12
  13         def __init__(self, type):
  14                 Converter.__init__(self, type)
  15                 if type == "BER":
  16                         self.type = self.BER
  17                 elif type == "SNR":
  18                         self.type = self.SNR
  19                 elif type == "SNRdB":
  20                         self.type = self.SNRdB
  21                 elif type == "AGC":
  22                         self.type = self.AGC
  23                 elif type == "NUMBER":
  24                         self.type = self.SLOT_NUMBER
  25                 elif type == "TYPE":
  26                         self.type = self.TUNER_TYPE
  27                 else:
  28                         self.type = self.LOCK
  29
  30         @cached
  31         def getText(self):
  32                 assert self.type not in (self.LOCK, self.SLOT_NUMBER), "the text output of FrontendInfo cannot be used for lock info"
  33                 percent = None
  34                 if self.type == self.BER: # as count
  35                         count = self.source.ber
  36                         if count is not None:
  37                                 return str(count)
  38                         else:
  39                                 return "N/A"
  40                 elif self.type == self.AGC:
  41                         percent = self.source.agc
  42                 elif self.type == self.SNR:
  43                         percent = self.source.snr
  44                 elif self.type == self.SNRdB:
  45                         if self.source.snr_db is not None:
  46                                 return "%3.02f dB" % (self.source.snr_db / 100.0)
  47                         elif self.source.snr is not None: #fallback to normal SNR...
  48                                 percent = self.source.snr
  49                 elif self.type == self.TUNER_TYPE:
  50                         return self.source.frontend_type and self.frontend_type or "Unknown"
  51                 if percent is None:
  52                         return "N/A"
  53                 return "%d %%" % (percent * 100 / 65536)
  54
  55         @cached
  56         def getBool(self):
  57                 assert self.type in (self.LOCK, self.BER), "the boolean output of FrontendInfo can only be used for lock or BER info"
  58                 if self.type == self.LOCK:
  59                         lock = self.source.lock
  60                         if lock is None:
  61                                 lock = False
  62                         return lock
  63                 else:
  64                         ber = self.source.ber
  65                         if ber is None:
  66                                 ber = 0
  67                         return ber > 0
  68
  69         text = property(getText)
  70
  71         boolean = property(getBool)
  72
  73         @cached
  74         def getValue(self):
  75                 assert self.type != self.LOCK, "the value/range output of FrontendInfo can not be used for lock info"
  76                 if self.type == self.AGC:
  77                         return self.source.agc or 0
  78                 elif self.type == self.SNR:
  79                         return self.source.snr or 0
  80                 elif self.type == self.BER:
  81                         if self.BER < self.range:
  82                                 return self.BER or 0
  83                         else:
  84                                 return self.range
  85                 elif self.type == self.TUNER_TYPE:
  86                         type = self.source.frontend_type
  87                         if type == 'DVB-S':
  88                                 return 0
  89                         elif type == 'DVB-C':
  90                                 return 1
  91                         elif type == 'DVB-T':
  92                                 return 2
  93                         return -1
  94                 elif self.type == self.SLOT_NUMBER:
  95                         num = self.source.slot_number
  96                         return num is None and -1 or num
  97
  98         range = 65536
  99         value = property(getValue)