src/measure_call_setup_time_to_android.py

   1 #!/usr/bin/env python3
   2 #
   3 # measure_call_setup_time_to_android - call setup time from PC to Android
   4 #
   5 # Copyright (C) 2015  Antonio Ospite <ao2@ao2.it>
   6 #
   7 # This program is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 import subprocess
  21 import time
  22
  23 from savemysugar.cumulative_average import cumulative_average
  24 from savemysugar.Modem import Modem
  25
  26
  27 def measure_call_setup_time_to_android(outgoing_port, destination_number):
  28     outgoing_modem = Modem(outgoing_port)
  29
  30     min_call_time = 10000
  31     max_call_time = -1
  32     min_call_setup_time = 10000
  33     max_call_setup_time = -1
  34
  35     avg_call_setup_time = 0
  36
  37     subprocess.check_call("adb logcat -c".split())
  38     logcat = subprocess.Popen("adb logcat -s SaveMySugar:*".split(),
  39                               stdout=subprocess.PIPE)
  40
  41     for i in range(10):
  42         print()
  43         print("Call: %s" % (i + 1))
  44         outgoing_modem.send_command("ATDT" + destination_number + ";")
  45         dial_time = time.time()
  46
  47         # Wait for the receiver to get a ring before terminating the call.
  48         #
  49         # When an incoming ring is detected, the SaveMySugar Android App
  50         # outputs a line like this:
  51         # D/SaveMySugar( 5555): 1450468488.997000 CALL_STATE_RINGING +39XX...
  52         for line in logcat.stdout:
  53             line_str = line.decode('UTF-8')
  54             if "CALL_STATE_RINGING" in line_str:
  55                 ring_time = time.time()
  56                 break
  57
  58         outgoing_modem.send_command("ATH")
  59         outgoing_modem.get_response()
  60
  61         hangup_time = time.time()
  62
  63         call_setup_time = ring_time - dial_time
  64         min_call_setup_time = min(min_call_setup_time, call_setup_time)
  65         max_call_setup_time = max(max_call_setup_time, call_setup_time)
  66         avg_call_setup_time = cumulative_average(avg_call_setup_time,
  67                                                  i + 1,
  68                                                  call_setup_time)
  69         print("Call setup time: %f" % call_setup_time)
  70         print("Min call setup time: %f" % min_call_setup_time)
  71         print("Max call setup time: %f" % max_call_setup_time)
  72         print("Average call setup time: %f" % avg_call_setup_time)
  73         print()
  74
  75         call_time = hangup_time - dial_time
  76         min_call_time = min(min_call_time, call_time)
  77         max_call_time = max(max_call_time, call_time)
  78         print("Total call time: %f" % call_time)
  79         print("Min call time: %f" % min_call_time)
  80         print("Max call time: %f" % max_call_time)
  81         print()
  82
  83         ring_time = -1
  84
  85         # When dialing with an analog modem I noticed that if calls are
  86         # separated one from another they take less time to set up, this
  87         # may be due to how an analog modem works: getting it on-hook and
  88         # off-hook takes quite some time.
  89         inter_call_sleep = 5.2
  90         print("Sleeping %.2f sec before the next call..." % inter_call_sleep)
  91         time.sleep(inter_call_sleep)
  92
  93
  94 def main():
  95     import sys
  96     if len(sys.argv) != 3:
  97         print("usage: %s" % sys.argv[0],
  98               "<outgoing serial port>", "<destination number>")
  99         sys.exit(1)
 100
 101     measure_call_setup_time_to_android(sys.argv[1], sys.argv[2])
 102
 103
 104 if __name__ == "__main__":
 105     main()