# -*- coding: UTF-8 -*-
import socket
import time
import traceback
from VideoCapture import Device
import threading
# 全局变量
is_sending = False
cli_address = ('', 0)
# 主机地址和端口
host = ''
port = 10218
# 初始化UDP socket
ser_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
ser_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
ser_socket.bind((host, port))
# 接收线程类，用于接收客户端发送的消息
class UdpReceiver(threading.Thread):
 def __init__(self):
  threading.Thread.__init__(self)
  self.thread_stop = False
 def run(self):
  while not self.thread_stop:
   # 声明全局变量，接收消息后更改
   global cli_address 
   global is_sending
   try:
    message, address = ser_socket.recvfrom(2048)
   except:
    traceback.print_exc()
    continue
  #  print message,cli_address
   cli_address = address
   if message == 'startCam':
    print 'start camera',
    is_sending = True
    ser_socket.sendto('startRcv', cli_address)    
   if message == 'quitCam':
    is_sending = False
    print 'quit camera',
 def stop(self):
  self.thread_stop = True
# 创建接收线程
receiveThread = UdpReceiver()
receiveThread.setDaemon(True)   # 该选项设置后使得主线程退出后子线程同时退出
receiveThread.start()
# 初始化摄像头
cam = Device()
cam.setResolution(320,240)
# 主线程循环，发送视频数据
while 1:
 if is_sending:  
  img = cam.getImage().resize((160,120))
  data = img.tostring()
  ser_socket.sendto(data, cli_address) 
  time.sleep(0.05)
 else:
  time.sleep(1)
receiveThread.stop()
ser_socket.close()

# -*- coding: UTF-8 -*-
import socket, time
import pygame
from pygame.locals import *
from sys import exit
# 服务器地址，初始化socket
ser_address = ('localhost', 10218)
cli_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# 设置超时
cli_socket.settimeout(5)
# 向服务器发送消息，并判断接收时是否超时，若超时则重发
while 1:
 cli_socket.sendto('startCam', ser_address)
 try:
  message, address = cli_socket.recvfrom(2048)
  if message == 'startRcv':
   print message
   break
 except socket.timeout:
  continue
# 此句无用。。防止窗口初始化后等待数据
cli_socket.recvfrom(65536)
# 初始化视频窗口
pygame.init()
screen = pygame.display.set_mode((640,480))
pygame.display.set_caption('Web Camera')
pygame.display.flip()
# 设置时间，可以用来控制帧率
clock = pygame.time.Clock()
# 主循环，显示视频信息
while 1:
 try:
  data, address = cli_socket.recvfrom(65536)
 except socket.timeout:
  continue
 camshot = pygame.image.frombuffer(data, (160,120), 'RGB')
 camshot = pygame.transform.scale(camshot, (640, 480))
 for event in pygame.event.get():
  if event.type == pygame.QUIT:
   cli_socket.sendto('quitCam', ser_address)
   cli_socket.close()
   pygame.quit()
   exit()
 screen.blit(camshot, (0,0))
 pygame.display.update() 
 clock.tick(20)