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annotate gamelib/sound.py @ 372:90abd39e6c3c 1.0.x

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Merge in post-pyweek fixes (r359:371).
author Simon Cross <hodgestar@gmail.com>
date Tue, 13 Oct 2009 20:28:48 +0000
parents 41db9f3ba29e
children 03d5cb669298
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1 import os
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2 import pygame
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3 import sys
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4
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5 import data
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6 import constants
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7
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8 SOUND_INITIALIZED = False
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9
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10 def init_sound():
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11 """initialize the sound system"""
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12 global SOUND_INITIALIZED
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13 try:
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14 pygame.mixer.init(constants.FREQ, constants.BITSIZE, constants.CHANNELS, constants.BUFFER)
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15 SOUND_INITIALIZED = True
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16 except pygame.error, exc:
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17 print >>sys.stderr, "Could not initialize sound system: %s" % exc
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19 SOUND_CACHE = {}
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21 def play_sound(filename):
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22 """plays the sound with the given filename from the data sounds directory"""
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23 if not SOUND_INITIALIZED:
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24 return
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25 file_path = data.filepath("sounds", filename)
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26 sound = SOUND_CACHE.get(file_path, None)
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27 if not sound:
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28 if not os.path.exists(file_path):
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29 return
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30 SOUND_CACHE[file_path] = sound = pygame.mixer.Sound(file_path)
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31 sound.play()
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33 CURRENT_MUSIC_FILE = None
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35 def stop_background_music():
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36 """stops any playing background music"""
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37 global CURRENT_MUSIC_FILE
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38 if not SOUND_INITIALIZED:
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39 return
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40 CURRENT_MUSIC_FILE = None
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41 # TODO: fadeout in a background thread
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42 pygame.mixer.music.stop()
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43
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44 def background_music(filename):
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45 """plays the background music with the given filename from the data sounds directory"""
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46 global CURRENT_MUSIC_FILE
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47 if not SOUND_INITIALIZED:
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48 return
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49 file_path = data.filepath("sounds", filename)
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50 if CURRENT_MUSIC_FILE == file_path:
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51 return
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52 stop_background_music()
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53 if not os.path.exists(file_path):
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54 return
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55 CURRENT_MUSIC_FILE = file_path
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56 pygame.mixer.music.load(file_path)
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57 pygame.mixer.music.set_volume(0.3)
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58 pygame.mixer.music.play(-1)
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