ObjFW  Diff

		[self _drawProgress];
	else
		[self _drawReceived];
}

- (void)calculateBPSAndETA
{
	_BPSWindow[_BPSWindowIndex++ % BPS_WINDOW_SIZE] =
	_BPS = (float)(_received - _lastReceived) /
	    (float)(_received - _lastReceived) /
	    -(float)_lastReceivedDate.timeIntervalSinceNow;

	if (_BPSWindowLength < BPS_WINDOW_SIZE)
		_BPSWindowLength++;

	_BPS = 0;
	for (size_t i = 0; i < _BPSWindowLength; i++)
		_BPS += _BPSWindow[i];
	_BPS /= _BPSWindowLength;

	_ETA = (double)(_length - _received) / _BPS;

	_lastReceived = _received;
	[_lastReceivedDate release];
	_lastReceivedDate = [[OFDate alloc] init];
}