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#!/usr/bin/env mdl
import socket
import base64
import cv2
import numpy as np
from collections import OrderedDict
from .server import get_server
def jpeg_encode(img):
return cv2.imencode('.png', img)[1]
def get_free_port(rng, low=2000, high=10000):
in_use = True
while in_use:
port = rng.randint(high - low) + low
in_use = False
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
s.bind(("0.0.0.0", port))
except socket.error as e:
if e.errno == 98: # port already in use
in_use = True
s.close()
return port
class Manager:
def __init__(self, img_encode_method=jpeg_encode, rng=None):
self._queue = OrderedDict()
self._server = None
self.img_encode_method = img_encode_method
if rng is None:
rng = np.random.RandomState(self.get_default_seed())
self.rng = rng
def get_default_seed(self):
return 0
def imshow(self, title, img):
data = self.img_encode_method(img)
data = base64.b64encode(data)
data = data.decode('utf8')
self._queue[title] = data
def waitKey(self, delay=0):
if self._server is None:
self.port = get_free_port(self.rng)
self._server, self._conn = get_server(port=self.port)
self._conn.send([delay, list(self._queue.items())])
# self._queue = OrderedDict()
return self._conn.recv()
global_manager = Manager()
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