# -*- coding: UTF-8 -*-

from VideoCapture import Device
import ImageDraw, sys, pygame, time
from pygame.locals import *
import socket
import time
from PIL import ImageEnhance
from threading import Thread
import traceback
import threading



# 全局变量
is_sending = False
cli_address = ('', 0)

# 主机地址和端口
host = 'localhost'
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


 
def disp(phrase,loc):
 s = font.render(phrase, True, (200,200,200))
 sh = font.render(phrase, True, (50,50,50))
 screen.blit(sh, (loc[0]+1,loc[1]+1))
 screen.blit(s, loc)

if __name__=='__main__':
 res = (640,480)
 
 cam = Device()
 cam.setResolution(res[0],res[1])
 
 
 brightness = 1.0
 contrast = 1.0
 shots = 0
 
 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()
 

 while 1:
 if is_sending: 
 camshot = ImageEnhance.Brightness(cam.getImage()).enhance(brightness)
 camshot = ImageEnhance.Contrast(camshot).enhance(contrast)
 clock = pygame.time.Clock()
 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()