def DataLinkReceive(self):
'''
描述：处理服务器的控制连接回复
参数：回复内容
返回：无
'''
WhetherStartedPlay = False
while True:
try:
TheData, TheAddress = self.DataSocket.recvfrom(
Constants.DATA_PACKET_SIZE)
#控制接收文件
if TheData:
ThePacket = RtpPacket()
ThePacket.decode(TheData)
CurrentSequenceNum = ThePacket.seqNum()
CurrentMarker = ThePacket.Marker()
#丢弃其余数据包
if self.DataSequence == CurrentSequenceNum - 1:
#print("received packet ", CurrentSequenceNum)
#回复ACK
ACKMessage = "ACK " + str(CurrentSequenceNum)
self.DataSocket.sendto(ACKMessage.encode(), TheAddress)
#判断是否新图片
if CurrentMarker == 0:
self.PictureFrame = self.PictureFrame + 1
#print(self.PictureFrame)
#写入
self.DataSequence = CurrentSequenceNum
self.WritePictureFrame(ThePacket.getPayload())
#控制播放图片
if self.PictureFrame - self.PicturePlay >= (
self.PicturePerSecond * self.BufferTime):
if WhetherStartedPlay == False:
WhetherStartedPlay = True
threading.Thread(target=self.UpdateMovie).start()
except:
# Stop listening upon requesting PAUSE or TEARDOWN
if self.PlayEvent.isSet():
break
#处理teardown事件
if self.Valid == False:
try:
self.DataSocket.shutdown(socket.SHUT_RDWR)
self.DataSocket.close()
except:
donothing = True
break
def DataLinkReceive(self):
'''
描述：处理服务器的控制连接回复
参数：回复内容
返回：无
'''
while True:
try:
TheData = self.DataSocket.recv(Constants.DATA_PACKET_SIZE)
if TheData:
ThePacket = RtpPacket()
ThePacket.decode(TheData)
CurrentSequenceNum = ThePacket.seqNum()
CurrentMarker = ThePacket.Marker()
if CurrentMarker == 0:
self.PictureFrame = self.PictureFrame + 1
print("New Frame")
print("Current Seq Num: " + str(CurrentSequenceNum))
if CurrentSequenceNum > self.DataSequence: # Discard the late packet
self.DataSequence = CurrentSequenceNum
self.WritePictureFrame(ThePacket.getPayload())
if CurrentMarker == 0:
TheCacheFileName = self.GetPictureCacheFileName(self.PictureFrame - 1)
self.UpdateMovie(TheCacheFileName)
except:
# Stop listening upon requesting PAUSE or TEARDOWN
if self.PlayEvent.isSet():
break
#处理teardown事件
if self.Valid == False:
try:
self.DataSocket.shutdown(socket.SHUT_RDWR)
self.DataSocket.close()
except:
donothing = True
break
