def __init__(self, file: BinaryIO):
super().__init__(None)
self.queue = Queue()
self.lastSeekTime = 0
self.requestedSpeed = 1
events = defaultdict(list)
startingPosition = file.tell()
file.seek(0, os.SEEK_END)
size = file.tell()
# Take note of the position of each event and its timestamp
file.seek(0)
currentMessagePosition = 0
tpkt = TPKTLayer()
player = PlayerMessageLayer()
tpkt.setNext(player)
def registerEvent(pdu: PlayerMessagePDU):
events[pdu.timestamp].append(currentMessagePosition)
player.createObserver(onPDUReceived=registerEvent)
while file.tell() < size:
data = file.read(4)
tpkt.recv(data)
data = file.read(tpkt.getDataLengthRequired())
tpkt.recv(data)
currentMessagePosition = file.tell()
file.seek(startingPosition)
# Use relative timestamps to simplify things
self.events = {}
if len(events) == 0:
self.duration = 0
else:
timestamps = sorted(events.keys())
startingTime = timestamps[0]
for timestamp in timestamps:
relative = timestamp - startingTime
self.events[relative] = events[timestamp]
self.duration = (timestamps[-1] - startingTime) / 1000.0
def __init__(self, file: BinaryIO):
self.events: Dict[int, List[int]] = {}
# Remember the current file position
startingPosition = file.tell()
# Get file size
file.seek(0, os.SEEK_END)
size = file.tell()
# Take note of the position of each event and its timestamp
events = defaultdict(list)
currentMessagePosition = 0
file.seek(0)
# Register PDUs as they are parsed by the layer
def registerEvent(pdu: PlayerMessagePDU):
events[pdu.timestamp].append(currentMessagePosition)
# The layer will take care of parsing for us
player = PlayerMessageLayer()
player.createObserver(onPDUReceived=registerEvent)
# Parse all events in the file
while file.tell() < size:
data = file.read(8)
player.recv(data)
data = file.read(player.getDataLengthRequired())
player.recv(data)
currentMessagePosition = file.tell()
# Restore original file position
file.seek(startingPosition)
# Use relative timestamps to simplify things
if len(events) == 0:
self.duration = 0
else:
timestamps = sorted(events.keys())
referenceTime = timestamps[0]
for absoluteTimestamp in timestamps:
relativeTimestamp = absoluteTimestamp - referenceTime
self.events[relativeTimestamp] = events[absoluteTimestamp]
self.duration = (timestamps[-1] - referenceTime) / 1000.0