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annotate pytouhou/network.py @ 612:73f134f84c7f

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Request a RGB888 context, since SDL2’s default of RGB332 sucks. On X11/GLX, it will select the first config available, that is the best one, while on EGL it will iterate over them to select the one closest to what the application requested. Of course, anything lower than RGB888 looks bad and we really don’t want that.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 26 Mar 2015 20:20:37 +0100
parents 711c75115675
children d1f0bb0b7a17
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1 import socket
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2 from struct import Struct
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3 from select import select
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4 from time import time
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5
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6 from pytouhou.utils.helpers import get_logger
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7
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8 logger = get_logger(__name__)
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9
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10 MSG_STRUCT = Struct('!HHH')
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11
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12 class Network(object):
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13 def __init__(self, port=8080, dest=None, selected_player=0):
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14 self.frame = 0
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15 self.keystate = 0
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16 self.old_keystate = 0
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17 self.remote_keystate = 0
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18
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19 self.selected_player = selected_player
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20
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21 self.remote_addr = dest
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22 self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
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23 self.sock.bind(('', port))
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26 def read_message(self):
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27 message = None
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29 start_time = time()
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30 delta = 1./60.
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31
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32 rlist, _, _ = select([self.sock], [], [], delta)
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33 while rlist:
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34 msg, addr = rlist[0].recvfrom(MSG_STRUCT.size)
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35 # Check whether the message comes from the right address
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36 if self.frame == 0 or addr == self.remote_addr:
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37 self.remote_addr = addr
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38
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39 frame, keystate, old_keystate = MSG_STRUCT.unpack(msg)
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41 # Check for well-formedness
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42 if frame in (self.frame, self.frame + 1):
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43 message = (frame, keystate, old_keystate)
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44 else:
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45 logger.error('Mismatch, got a message from %s, waiting for %s.', self.remote_addr, addr)
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46
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47 # If no valid message has been read, wait for one as long as possible
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48 # else, read as much as we can without blocking.
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49 delta = 0 if message else max(0, 1./60. - (time() - start_time))
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50 rlist, _, _ = select(rlist, [], [], delta)
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52 return message
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55 def send_message(self):
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56 if self.remote_addr is not None:
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57 self.sock.sendto(MSG_STRUCT.pack(self.frame, self.keystate, self.old_keystate), self.remote_addr)
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59
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60 def run_game_iter(self, game, keystate, other_keystate):
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61 keystates = [other_keystate, other_keystate]
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62 keystates[self.selected_player] = keystate
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63 game.run_iter(keystates)
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66 def run_iter(self, game, keystate):
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67 if game.frame % 3 == 0:
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68 # Phase 1: Update game with old data
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69 self.run_game_iter(game, self.keystate, self.remote_keystate)
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70 elif game.frame % 3 == 1:
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71 # Phase 2: Update data, send new data, update game with old data
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72 self.old_keystate, self.keystate = self.keystate, keystate
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73 self.frame = game.frame // 3
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74 self.send_message()
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75 self.run_game_iter(game, self.old_keystate, self.remote_keystate)
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76 elif game.frame % 3 == 2:
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77 # Phase 3: Send new data, get remote data, update game with new data
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78 self.send_message()
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79 # Follow one valid update
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80 message = self.read_message()
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81 if message:
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82 frame, keystate, old_keystate = message
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83 if frame == self.frame:
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84 self.remote_keystate = keystate
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85 elif frame == self.frame + 1:
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86 self.remote_keystate = old_keystate
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87 else:
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88 raise Exception #TODO
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89 self.run_game_iter(game, self.keystate, self.remote_keystate)
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90 elif game.frame > 2:
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91 logger.warn('Message not received in time, dropping frame.')
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