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annotate nagslang/sound.py @ 665:a538d791ff9c v0.1.x

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pygame.mixer.Sound is too clever by half and should be shot repeatedly
author Neil Muller <drnlmuller@gmail.com>
date Sun, 08 Sep 2013 12:35:33 +0200
parents e65d59081bdd
children 1ffd49c34f4a 45d2a6aef3a4
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1 """Sound utilities."""
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2
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3 from pygame import mixer
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4
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5 from nagslang.options import options
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6 from nagslang.resources import resources
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7 from nagslang.constants import (
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8 FREQ, BITSIZE, CHANNELS, BUFFER, DEFAULT_SOUND_VOLUME,
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9 DEFAULT_MUSIC_VOLUME)
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10
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11
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12 class DummySound(object):
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13 def init(self):
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14 pass
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15
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16 def play_sound(self, name, volume=DEFAULT_SOUND_VOLUME):
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17 pass
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18
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19 def play_music(self, name, volume=DEFAULT_MUSIC_VOLUME):
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20 pass
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21
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22 def pause_music(self):
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23 pass
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24
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25 def resume_music(self):
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26 pass
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27
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28 def stop(self):
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29 pass
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30
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31
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32 class PygameSound(object):
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33 def __init__(self):
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34 self._sounds = {}
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35
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36 def init(self):
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37 mixer.init(FREQ, BITSIZE, CHANNELS, BUFFER)
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38 silence = self.load_sound("silence.ogg")
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39 if silence.get_length() < 1:
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40 raise RuntimeError("Sound load error - silence.ogg too short")
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41 self.play_sound("silence.ogg")
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42
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43 def load_sound(self, name):
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44 track_name = resources.get_resource_path("sounds", name)
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45 sound = self._sounds.get(track_name)
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46 if sound is None:
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47 sound = self._sounds[track_name] = mixer.Sound(track_name)
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48 return sound
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49
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50 def play_sound(self, name, volume=DEFAULT_SOUND_VOLUME):
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51 sound = self.load_sound(name)
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52 if sound is not None:
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53 sound.set_volume(volume)
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54 sound.play()
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55
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56 def play_music(self, name, volume=DEFAULT_MUSIC_VOLUME):
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57 if not options.music:
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58 return
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59 track_name = resources.get_resource_path("music", name)
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60 mixer.music.load(track_name)
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61 mixer.music.set_volume(volume)
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62 mixer.music.play(-1) # loop sound
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63
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64 def pause_music(self):
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65 mixer.music.pause()
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66
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67 def unpause_music(self):
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68 mixer.music.unpause()
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69
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70 def stop(self):
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71 mixer.fadeout(1000)
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72 mixer.music.stop()
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73
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74
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75 class SoundProxy(object):
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76 def __init__(self):
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77 self._sound = DummySound()
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78
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79 def init(self):
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80 """Attempt to initialize the sound system."""
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81 if options.sound:
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82 try:
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83 pyg_sound = PygameSound()
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84 pyg_sound.init()
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85 self._sound = pyg_sound
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86 except Exception, err:
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87 print "Failed to enable sound: %r" % (err,)
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88
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89 def __getattr__(self, name):
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90 return getattr(self._sound, name)
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92
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93 sound = SoundProxy()