no-cups
Last change
on this file since eee389a was
eee389a,
checked in by Jessica B. Hamrick <jhamrick@…>, 12 years ago
|
Better threading model
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-
Property mode set to
100644
|
File size:
2.2 KB
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Line | |
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1 | import logging |
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2 | import threading |
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3 | import subprocess |
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4 | import time |
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5 | |
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6 | # initialize logger |
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7 | logger = logging.getLogger(__name__) |
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8 | |
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9 | class Player(threading.Thread): |
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10 | |
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11 | def __init__(self, fh, *args, **kwargs): |
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12 | self.lock = threading.RLock() |
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13 | |
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14 | with self.lock: |
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15 | super(Player, self).__init__(*args, **kwargs) |
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16 | self.fh = fh |
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17 | self.player = None |
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18 | self._callback = None |
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19 | |
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20 | @property |
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21 | def is_playing(self): |
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22 | with self.lock: |
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23 | playing = self.player and self.player.poll() is None |
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24 | return playing |
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25 | |
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26 | @property |
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27 | def callback(self): |
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28 | return self._callback |
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29 | @callback.setter |
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30 | def callback(self, val): |
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31 | with self.lock: |
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32 | self._callback = val |
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33 | |
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34 | def run(self): |
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35 | if self.fh is None: |
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36 | raise ValueError, "file handler is None" |
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37 | |
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38 | self.mplayer_play() |
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39 | with self.lock: |
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40 | if self.callback: |
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41 | self.callback() |
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42 | |
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43 | def mplayer_play(self): |
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44 | logger.info("playing file '%s'" % self.fh.name) |
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45 | |
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46 | # open mplayer |
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47 | with self.lock: |
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48 | self.player = subprocess.Popen( |
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49 | "/usr/bin/mplayer -really-quiet -slave %s" % self.fh.name, |
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50 | shell=True, |
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51 | stdin=subprocess.PIPE, |
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52 | stderr=subprocess.PIPE, |
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53 | stdout=subprocess.PIPE) |
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54 | |
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55 | # wait for mplayer to finish |
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56 | while True: |
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57 | with self.lock: |
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58 | playing = self.is_playing |
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59 | if not playing: |
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60 | break |
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61 | time.sleep(0.1) |
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62 | |
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63 | logger.info("mplayer finished with code %d" % self.player.returncode) |
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64 | |
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65 | # get output from mplayer and log it |
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66 | with self.lock: |
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67 | stderr = self.player.stderr.read() |
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68 | stdout = self.player.stdout.read() |
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69 | |
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70 | if stderr.strip() != "": |
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71 | logger.error(stderr) |
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72 | if stdout.strip() != "": |
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73 | logger.debug(stdout) |
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74 | |
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75 | def mplayer_pause(self): |
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76 | with self.lock: |
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77 | if self.is_playing: |
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78 | self.player.stdin.write("pause\n") |
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79 | |
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80 | def mplayer_stop(self): |
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81 | with self.lock: |
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82 | if self.is_playing: |
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83 | self.player.stdin.write("quit\n") |
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