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annotate service/playSound/playSound.py @ 1685:6b80a6c58907

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minor changes to several services
author drewp@bigasterisk.com
date Mon, 27 Sep 2021 23:12:43 -0700
parents b27a4652cd84
children
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1 """
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2 play sounds according to POST requests.
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3 """
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4 from docopt import docopt
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5 import cyclone.web
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6 import os, sys, tempfile, itertools, subprocess
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7 import treq
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8 from twisted.internet import reactor
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9 from twisted.internet.defer import inlineCallbacks
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10 from twisted.web.static import File
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11 from standardservice.logsetup import log, verboseLogging
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12
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13 class LOADING(object): pass
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14
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15 class SoundEffects(object):
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16 def __init__(self):
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17 self.buffers = {} # URIRef : path
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18 self.playingSources = []
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19 self.queued = []
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20 self.volume = 1 # level for the next sound that's played (or existing instances of the same sound)
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21
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22 @inlineCallbacks
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23 def _getSound(self, uri):
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24 resp = yield treq.get(uri.encode('utf8'))
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25 body = yield treq.content(resp)
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26 path = '/tmp/sound_%s' % hash(uri)
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27 with open(path, 'wb') as out:
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28 out.write(body)
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29 log.info('write %s bytes to %s', len(body), path)
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30 self.buffers[uri] = path
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31 print('donesave')
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32
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33 def playEffect(self, uri: str):
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34 if uri not in self.buffers:
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35 self.buffers[uri] = LOADING
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36 self._getSound(uri).addCallback(lambda ret: self.playEffect(uri)).addErrback(log.error)
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37 return b'will play after load'
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38 if self.buffers[uri] is LOADING:
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39 # The first playback loads then plays, but any attempts
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40 # during that load are dropped, not queued.
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41 return
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42 snd = self.buffers[uri]
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43 print('subp')
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44 subprocess.check_call(['paplay', snd])
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45 return b'played'
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46
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47 def done(self, src):
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48 try:
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49 self.playingSources.remove(src)
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50 except ValueError:
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51 pass
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52
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53 def stopAll(self):
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54 while self.playingSources:
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55 self.playingSources.pop().stop()
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56 for q in self.queued:
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57 q.cancel()
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58 # doesn't cover the callLater ones
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59
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60 class Index(cyclone.web.RequestHandler):
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61 def get(self):
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62 self.render('index.html')
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63
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64 class PlaySound(cyclone.web.RequestHandler):
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65 def post(self):
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66 uri = self.get_argument('uri')
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67 return self.settings.sfx.playEffect(uri)
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68
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69 class Volume(cyclone.web.RequestHandler):
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70 def put(self):
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71 self.settings.sfx.setVolume(float(self.get_argument('v')))
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72 return b"ok"
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73
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74 class StopAll(cyclone.web.RequestHandler):
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75 def post(self):
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76 self.settings.sfx.stopAll()
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77 return b"ok"
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78
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79
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80 if __name__ == '__main__':
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81 arg = docopt('''
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82 Usage: playSound.py [options]
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83
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84 -v Verbose
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85 ''')
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86 verboseLogging(arg['-v'])
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87
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88 os.environ['PULSE_SERVER'] = '172.17.0.1'
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89 sfx = SoundEffects()
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90
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91 reactor.listenTCP(9049, cyclone.web.Application(handlers=[
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92 (r'/', Index),
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93 (r'/playSound', PlaySound),
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94 (r'/volume', Volume),
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95 (r'/stopAll', StopAll),
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96 ], template_path='.', sfx=sfx))
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97 reactor.run()