tools/generic_utils/time_intervals.py

   1 #!/usr/bin/env python
   2 #
   3 import os, sys, time
   4 from time_formats import *
   5
   6
   7 ##############################################
   8 def shift_time(intervals_sec, shift_sec):
   9
  10     shifted_intervals = []
  11
  12     for i in intervals_sec:
  13         l = i[0] + shift_sec
  14         r = i[1] + shift_sec
  15         shifted_intervals.append((l,r))
  16
  17     return shifted_intervals
  18
  19 ##############################################
  20 def rel2abs(intervals_sec, zeroTime_str):
  21
  22     shifted_intervals_sec = shift_time(intervals_sec, str2sec(zeroTime_str))
  23
  24     return periodsSec2periodsStr(shifted_intervals_sec)
  25
  26 ##############################################
  27 def abs2rel(intervals_sec, zeroTime_str):
  28
  29     shifted_intervals_sec = shift_time(intervals_sec, -str2sec(zeroTime_str))
  30
  31     return shifted_intervals_sec
  32
  33
  34 ####################################################
  35 def select_longIntervals(intervals_sec, minLength_sec):
  36
  37     long_intervals = []
  38     for i in intervals_sec:
  39         if i[1] - i[0] >= minLength_sec:
  40             long_intervals.append(i)
  41
  42     return long_intervals
  43
  44
  45 ####################################################
  46 def split_longInterval(interval_str, maxLength_sec):
  47
  48     interval_sec = periodsStr2periodsSec([interval_str])[0]
  49     interval_length = interval_sec[1] - interval_sec[0]
  50
  51     if interval_length <= maxLength_sec:
  52         return [interval_str]
  53
  54     times = int(interval_length/maxLength_sec)
  55     rest = interval_length - times*maxLength_sec
  56
  57     shorter_intervals = []
  58     for i in range (times-1):
  59         shorter_intervals.append((interval_sec[0] + maxLength_sec*i, interval_sec[0]+ (i+1)*maxLength_sec))
  60
  61
  62     if rest < float(maxLength_sec)/3:
  63
  64         shorter_intervals.append((interval_sec[0]+ maxLength_sec*(times-1),
  65                                   interval_sec[0]+ maxLength_sec*times+ rest))
  66
  67     else:
  68         shorter_intervals.append((interval_sec[0]+ maxLength_sec*(times-1),
  69                                   interval_sec[0]+ maxLength_sec*times))
  70
  71         shorter_intervals.append((interval_sec[0]+ maxLength_sec*times,
  72                                   interval_sec[0]+ maxLength_sec*times+ rest))
  73
  74     return periodsSec2periodsStr(shorter_intervals)
  75