def start(self):
if not self.stopped:
return
super().start()
mouse_source, keyboard_source, engagement_source = self.sources
initial_keyboard_event = keyboard.KeyboardEvent(keyboard.KEY_UP, 0)
initial_mouse_event = mouse.ButtonEvent(event_type=mouse.UP,
button=0,
time=time.time())
self.subscriptions = [
mouse_source.output.pipe(
operators.start_with(initial_mouse_event)).pipe(
operators.combine_latest(
keyboard_source.output.pipe(
operators.start_with(initial_keyboard_event)),
engagement_source.output)).pipe(
operators.throttle_first(0.1)) # in seconds
.subscribe(self.update)
]
if self.window is None:
self.window = Window(points=self.points_in_buffer,
toggle_callback=self.toggle_recording)
self.window.show()
self.window.activateWindow()
self.window.raise_()
def start(self):
if not self.stopped:
return
super().start()
video_source, = self.sources
self.subscriptions = [
video_source.output.pipe(
operators.throttle_first(0.1)) # in seconds
.subscribe(self.process_frame),
]
def start(self):
if not self.stopped:
return
super().start()
mouse_source, = self.sources
self.subscriptions = [
mouse_source.output.pipe(
operators.throttle_first(self.window_duration)).subscribe(
self._subj.on_next),
]
def main():
loop = asyncio.get_event_loop()
io_scheduler = AsyncIOThreadSafeScheduler(loop=loop)
scheduler = ThreadPoolScheduler(multiprocessing.cpu_count())
semaphore = Subject()
semaphore_stream = semaphore.pipe(
ops.flat_map(lambda _: rx.of(True).pipe(
ops.delay(ARGS.block_time, scheduler=scheduler),
ops.start_with(False))), ops.start_with(True))
video_stream_observable = rx.using(
lambda: VideoStreamDisposable(),
lambda d: rx.from_iterable(video_stream_iterable(d.cap)))
gated_video_stream = video_stream_observable.pipe(
ops.subscribe_on(scheduler),
ops.sample(1 / ARGS.fps), # sample frames based on fps
ops.combine_latest(semaphore_stream),
ops.filter(lambda tup: tup[1]), # proceed only if semaphore allows
ops.map(lambda tup: tup[0]) # take only frame
)
disposable = gated_video_stream.pipe(
ops.filter(has_face), # filter frames without faces
ops.map(lambda frame: Image.fromarray(
cv2.cvtColor(frame, cv2.COLOR_BGR2RGB))), # map frame to PIL image
ops.map(lambda img: img.resize(
(640, 360))), # resize image (inference will be faster)
ops.observe_on(io_scheduler),
ops.map(lambda img: ImageFacesPair(img, analyse_frame(img))
), # analyse frame for faces
ops.filter(lambda img_faces_pair: any([
face.top_prediction.confidence > ARGS.threshold
for face in img_faces_pair.faces
])), # proceed only if there is a known face in the frame
ops.throttle_first(1),
ops.flat_map(unlock_request), # unlock the door
ops.do_action(
on_next=lambda _: semaphore.on_next(True)
) # trigger semaphore which will block stream for "block-seconds" seconds (doors are unlocked for that long after unlock request)
).subscribe(on_error=lambda e: logger.exception(e))
try:
loop.run_forever()
except Exception as e:
logger.exception(e)
logger.info("Smart lock face recognition engine shutdown")
disposable.dispose()
def add_by_user_id(self, userid: str, sniff_config: Config):
assert userid == sniff_config.userid
assert userid not in self.observable_map
filtered_notification = self.attend_notifier.pipe(
operators.filter(lambda uid: uid == userid)).pipe(
operators.throttle_first(1))
context = AttendancenStateContext(
userid,
False,
filtered_notification,
absence_due_second=sniff_config.absence_due_second)
self.observable_map[sniff_config.userid] = context.get_observable()
self.observable_map[sniff_config.userid].subscribe(
self.handle_state_change)
def configure_subscriptions(self, connected):
if connected:
self.subjects.image_producer.pipe(
operators.observe_on(self.feed_scheduler),
operators.buffer_with_count(self.batch_size),
bp_operator(BackPressure.DROP, 5),
operators.take_until(self._stop),
).subscribe(ErrorToConsoleObserver(self.feed_image))
self.inference_comm.back_pressure_chan.pipe(
operators.subscribe_on(self.process_scheduler),
operators.take_until(self._stop)).subscribe(
ErrorToConsoleObserver(self.update_back_pressure_status))
# report error when image source is still producing when back pressuring
self.subjects.analyzer_back_pressure_detected.pipe(
operators.combine_latest(self.subjects.image_producer),
operators.filter(lambda x: x[0]),
operators.throttle_first(1.0),
operators.take_until(self._stop),
).subscribe(
ErrorToConsoleObserver(lambda x: self.logger.warning(
"Image is feeding while back-pressure is detected. Please slow down the FPS"
)))
self.inference_comm.result_chan.pipe(
operators.subscribe_on(self.process_scheduler),
operators.take_until(self._stop)).subscribe(
ErrorToConsoleObserver(self.result_processing))
self.inference_comm.error_chan.pipe(
operators.take_until(self._stop)).subscribe(
ErrorToConsoleObserver(lambda err: self.logger.error(err)))
self.inference_comm.connection_chan.pipe(
operators.take_until(self._stop)).subscribe(
ErrorToConsoleObserver(lambda connected: self.logger.info(
"GRPC Remote analyzer connected" if connected else
"GRPC Remote analyzer disconnected")))
self.inference_comm.stats_chan.take_until(self._stop).subscribe(
ErrorToConsoleObserver(lambda x: self.logger.info(
f"Processed {x.frame} frames. Average {x.processTime / x.frame} secs"
)))
def start(self):
# report more image when back pressure
self.subjects.image_producer.pipe(
operators.observe_on(self.scheduler),
operators.combine_latest(
self.subjects.analyzer_back_pressure_detected),
operators.filter(
lambda x: x[1]), # only operate when back pressure
operators.buffer_with_time(1.0), # in 1 sec
operators.filter(lambda x: len(x) > 3), # more than 3 emission
operators.throttle_first(3.0), # report every 3 seconds
operators.take_until(self._stop),
).subscribe(self.report_back_pressure_emission)
self.subjects.image_producer.pipe(
operators.observe_on(
self.scheduler), # prevent blocking the upstream subject
operators.filter(self.back_pressure_barrier),
operators.buffer_with_count(5),
bp_drop_report_full(self.subjects.analyzer_back_pressure_detected,
3, 1),
operators.take_until(self._stop),
).subscribe(ErrorToConsoleObserver(self.produce_fake_analyze_data))
super(TestAnalyzer, self).start()
def create():
return xs.pipe(ops.throttle_first(200))
def create():
return xs.pipe(ops.throttle_first(200))
# 操作数据流
print('求所有偶数')
some_data = rx.of(1, 2, 3, 4, 5, 6, 7, 8)
some_data2 = rx.from_iterable(range(10, 20))
some_data.pipe(
op.merge(some_data2),
op.filter(lambda i: i % 2 == 0),
# op.map(lambda i: i * 2)
).subscribe(lambda i: print(i))
# debounce操作符，仅在时间间隔之外的可以发射
print('防止重复发送')
ob = Subject()
ob.pipe(
op.throttle_first(3)
# op.debounce(3)
).subscribe(
on_next=lambda i: print(i),
on_completed=lambda: print('Completed')
)
print('press enter to print, press other key to exit')
while True:
s = input()
if s == '':
ob.on_next(datetime.datetime.now().time())
else:
ob.on_completed()
break