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annotate skaapsteker/sound.py @ 632:0675f390653c

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Initial port to Python 3 and Pygame 2.
author Simon Cross <hodgestar@gmail.com>
date Fri, 20 Jan 2023 20:01:06 +0100
parents 62569f486ede
children
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1 """Support for playing sounds and music"""
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2
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3 from pygame import mixer
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4 import pygame
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5 from . import data
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6 from .constants import FREQ, BITSIZE, CHANNELS, BUFFER
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7
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8 _GLOBAL_SOUND = None
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9
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10
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11 def load_sound(key, track_name, volume=None):
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12 if _GLOBAL_SOUND is not None:
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13 _GLOBAL_SOUND.load_sound(key, track_name, volume)
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14
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15 def play_sound(key):
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16 if _GLOBAL_SOUND is not None:
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17 _GLOBAL_SOUND.play_sound(key)
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18
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19
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20 class SoundSystem(object):
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21
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22 def __init__(self, want_sound):
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23 global _GLOBAL_SOUND
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24 if want_sound:
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25 # See if we can actually enabled sound
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26 try:
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27 mixer.init(FREQ, BITSIZE, CHANNELS, BUFFER)
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28 test_sound = mixer.Sound(data.filepath('sounds/silence.ogg'))
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29 test_sound.play()
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30 self.sound_enabled = True
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31 except pygame.error:
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32 print('Unable to enable sound')
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33 self.sound_enabled = False
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34 else:
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35 self.sound_enabled = False
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36
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37 self._sounds = {}
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38 _GLOBAL_SOUND = self
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40
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41 def play_background_music(self, track_name, volume=1.0):
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42 if self.sound_enabled:
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43 try:
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44 mixer.music.load(data.filepath(track_name))
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45 mixer.music.play(-1) # Loop forever
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46 mixer.music.set_volume(volume)
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47 except pygame.error:
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48 print('Unable to load track')
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49
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50 def stop_music(self):
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51 if self.sound_enabled:
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52 mixer.music.stop()
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53
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54 def load_sound(self, key, track_name, volume=None):
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55 if key in self._sounds:
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56 # First caller wins on duplicate keys
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57 return
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58 if not self.sound_enabled:
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59 self._sounds[key] = None
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60 else:
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61 self._sounds[key] = pygame.mixer.Sound(data.filepath(track_name))
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62 if volume is not None:
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63 self._sounds[key].set_volume(volume)
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65 def play_sound(self, key):
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66 sound = self._sounds.get(key, None)
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67 if sound:
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68 sound.play()
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69
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70 def stop_all_sounds(self):
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71 if self.sound_enabled:
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72 mixer.stop()
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73
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74 def pause(self):
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75 if self.sound_enabled:
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76 mixer.music.pause()
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77
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78 def unpause(self):
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79 if self.sound_enabled:
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80 mixer.music.unpause()