def estimate_frequency(self, always_query_sample_rate):
"""Estimates frequency and updates data.
Guesses the most probable frequency by looking at changes in
timestamps (RFC 3550 section 5.1), calculates clock drifts and
sending time of packets. Updates `self.data_points` with changes
in delay and send time.
"""
delta_timestamp = (self.data_points[-1].timestamp -
self.data_points[0].timestamp)
delta_arr_timestamp = float((self.data_points[-1].arrival_timestamp_ms -
self.data_points[0].arrival_timestamp_ms))
freq_est = delta_timestamp / delta_arr_timestamp
freq_vec = [8, 16, 32, 48, 90]
freq = None
for f in freq_vec:
if abs((freq_est - f) / f) < 0.05:
freq = f
print("Estimated frequency: {:.3f}kHz".format(freq_est))
if freq is None or always_query_sample_rate:
if not always_query_sample_rate:
print ("Frequency could not be guessed.", end=" ")
freq = int(misc.get_input("Input frequency (in kHz)> "))
else:
print("Guessed frequency: {}kHz".format(freq))
for point in self.data_points:
point.real_send_time_ms = (point.timestamp -
self.data_points[0].timestamp) / freq
point.delay = point.arrival_timestamp_ms -point.real_send_time_ms
def ChooseSsrc(self):
"""Queries user for SSRC."""
if len(self.ssrc_frequencies) == 1:
chosen_ssrc = self.ssrc_frequencies.keys()[0]
self.PrintSsrcInfo("", chosen_ssrc)
return chosen_ssrc
ssrc_is_incoming = misc.SsrcDirections(self.data_points)
incoming = [ssrc for ssrc in ssrc_is_incoming if ssrc_is_incoming[ssrc]]
outgoing = [ssrc for ssrc in ssrc_is_incoming if not ssrc_is_incoming[ssrc]]
print("\nIncoming:\n")
for (i, ssrc) in enumerate(incoming):
self.PrintSsrcInfo(i, ssrc)
print("\nOutgoing:\n")
for (i, ssrc) in enumerate(outgoing):
self.PrintSsrcInfo(i + len(incoming), ssrc)
while True:
chosen_index = int(misc.get_input("choose one> "))
if 0 <= chosen_index < len(self.ssrc_frequencies):
return (incoming + outgoing)[chosen_index]
else:
print("Invalid index!")
def EstimateFrequency(self, always_query_sample_rate):
"""Estimates frequency and updates data.
Guesses the most probable frequency by looking at changes in
timestamps (RFC 3550 section 5.1), calculates clock drifts and
sending time of packets. Updates `self.data_points` with changes
in delay and send time.
"""
delta_timestamp = (self.data_points[-1].timestamp -
self.data_points[0].timestamp)
delta_arr_timestamp = float((self.data_points[-1].arrival_timestamp_ms -
self.data_points[0].arrival_timestamp_ms))
freq_est = delta_timestamp / delta_arr_timestamp
freq_vec = [8, 16, 32, 48, 90]
freq = None
for f in freq_vec:
if abs((freq_est - f) / f) < 0.05:
freq = f
print("Estimated frequency: {:.3f}kHz".format(freq_est))
if freq is None or always_query_sample_rate:
if not always_query_sample_rate:
print ("Frequency could not be guessed.", end=" ")
freq = int(misc.get_input("Input frequency (in kHz)> "))
else:
print("Guessed frequency: {}kHz".format(freq))
for point in self.data_points:
point.real_send_time_ms = (point.timestamp -
self.data_points[0].timestamp) / freq
point.delay = point.arrival_timestamp_ms - point.real_send_time_ms
def choose_ssrc(self):
"""Queries user for SSRC."""
if len(self.ssrc_frequencies) == 1:
chosen_ssrc = self.ssrc_frequencies[0][-1]
self.print_ssrc_info("", chosen_ssrc)
return chosen_ssrc
ssrc_is_incoming = misc.ssrc_directions(self.data_points)
incoming = [ssrc for ssrc in ssrc_is_incoming if ssrc_is_incoming[ssrc]]
outgoing = [ssrc for ssrc in ssrc_is_incoming if not ssrc_is_incoming[ssrc]]
print("\nIncoming:\n")
for (i, ssrc) in enumerate(incoming):
self.print_ssrc_info(i, ssrc)
print("\nOutgoing:\n")
for (i, ssrc) in enumerate(outgoing):
self.print_ssrc_info(i + len(incoming), ssrc)
while True:
chosen_index = int(misc.get_input("choose one> "))
if 0 <= chosen_index < len(self.ssrc_frequencies):
return (incoming + outgoing)[chosen_index]
else:
print("Invalid index!")
def choose_ssrc(self):
"""Queries user for SSRC."""
if len(self.ssrc_frequencies) == 1:
chosen_ssrc = self.ssrc_frequencies[0][-1]
self.print_ssrc_info("", chosen_ssrc)
return chosen_ssrc
for (i, ssrc) in enumerate(self.ssrc_frequencies):
self.print_ssrc_info(i, ssrc)
while True:
chosen_index = int(misc.get_input("choose one> "))
if 0 <= chosen_index < len(self.ssrc_frequencies):
return list(self.ssrc_frequencies)[chosen_index]
else:
print("Invalid index!")
def choose_ssrc(self):
"""Queries user for SSRC."""
if len(self.ssrc_frequencies) == 1:
chosen_ssrc = self.ssrc_frequencies[0][-1]
self.print_ssrc_info("", chosen_ssrc)
return chosen_ssrc
for (i, ssrc) in enumerate(self.ssrc_frequencies):
self.print_ssrc_info(i, ssrc)
while True:
chosen_index = int(misc.get_input("choose one> "))
if 0 <= chosen_index < len(self.ssrc_frequencies):
return list(self.ssrc_frequencies)[chosen_index]
else:
print("Invalid index!")
if __name__ == '__main__':
import misc
args = misc.read_args()
EXAMPLE = args.example
INPUT_PROBLEM = args.console_input
GUI = not args.nogui
GUI_FAST = args.fast
GUI_SHOW_STEPS = args.show_steps
ARC_CONSISTENCY = args.arc_consistency
FORWARD_CHECK = (True if ARC_CONSISTENCY else args.forward_check)
if INPUT_PROBLEM:
problem = np.array(misc.get_input(), dtype=np.int32)
else:
problem = misc.get_example(EXAMPLE)
if GUI:
from GUI import start_GUI
params = {
'FORWARD_CHECK': FORWARD_CHECK,
'ARC_CONSISTENCY': ARC_CONSISTENCY,
'SHOW_STEPS': GUI_SHOW_STEPS,
'FAST': GUI_FAST
}
start_GUI(problem, **params)
else:
start = time()
solutions = solve(problem,
