mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-18 16:53:38 +00:00
39 lines
1.2 KiB
Python
39 lines
1.2 KiB
Python
from time import time
|
|
|
|
DATARATE_UPDATE = 1.0 # Time slice (in second) for datarate computation
|
|
|
|
|
|
class DataRate:
|
|
"""
|
|
Compute average speed in bits per second of a function.
|
|
Store self.size data rates to compute good average speed.
|
|
Don't compute average before self.min_size values are computed.
|
|
"""
|
|
|
|
def __init__(self, offset, size=20, min_size=3):
|
|
self.last_offset = offset
|
|
self.last_time = time()
|
|
self.datarates = []
|
|
# Average bit rate
|
|
self.average = None
|
|
# Number of stored value used to compute average data rate
|
|
self.size = size
|
|
self.min_size = min_size
|
|
|
|
def update(self, offset):
|
|
# Compute time delta
|
|
difftime = time() - self.last_time
|
|
if difftime < DATARATE_UPDATE:
|
|
# Only update each second
|
|
return
|
|
self.last_time = time()
|
|
|
|
# Compute data rate
|
|
rate = float(offset - self.last_offset) / difftime
|
|
self.last_offset = offset
|
|
|
|
# Update statistics
|
|
self.datarates.append(rate)
|
|
self.datarates = self.datarates[-self.size:]
|
|
if self.min_size <= len(self.datarates):
|
|
self.average = sum(self.datarates) / len(self.datarates)
|