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annotate gamelib/sound.py @ 99:f5d56688943b

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Added background music support, and daytime and night time music (really animal sounds, not music)
author David Fraser <davidf@sjsoft.com>
date Wed, 02 Sep 2009 12:50:28 +0000
parents 529a4d41c67a
children 41db9f3ba29e
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23a8b2e49e9f Added ability to initialize sound and play sounds, and handle sound not working / file being missing etc
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1 import os
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2 import pygame
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3
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4 import data
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5 import constants
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6
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7 SOUND_INITIALIZED = False
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8
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9 def init_sound():
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10 """initialize the sound system"""
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11 global SOUND_INITIALIZED
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12 try:
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13 pygame.mixer.init(constants.FREQ, constants.BITSIZE, constants.CHANNELS, constants.BUFFER)
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14 SOUND_INITIALIZED = True
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15 except pygame.error, exc:
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16 print >>sys.stderr, "Could not initialize sound system: %s" % exc
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17
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18 SOUND_CACHE = {}
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20 def play_sound(filename):
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21 """plays the sound with the given filename from the data sounds directory"""
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22 if not SOUND_INITIALIZED:
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23 return
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24 file_path = data.filepath("sounds", filename)
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25 sound = SOUND_CACHE.get(file_path, None)
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26 if not sound:
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27 if not os.path.exists(file_path):
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28 return
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29 SOUND_CACHE[file_path] = sound = pygame.mixer.Sound(file_path)
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30 sound.play()
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32 CURRENT_MUSIC_FILE = None
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34 def stop_background_music():
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35 """stops any playing background music"""
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36 global CURRENT_MUSIC_FILE
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37 CURRENT_MUSIC_FILE = None
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38 # TODO: fadeout in a background thread
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39 pygame.mixer.music.stop()
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41 def background_music(filename):
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42 """plays the background music with the given filename from the data sounds directory"""
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43 global CURRENT_MUSIC_FILE
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44 if not SOUND_INITIALIZED:
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45 return
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46 file_path = data.filepath("sounds", filename)
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47 if CURRENT_MUSIC_FILE == file_path:
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48 return
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49 stop_background_music()
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50 if not os.path.exists(file_path):
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51 return
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52 CURRENT_MUSIC_FILE = file_path
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53 pygame.mixer.music.load(file_path)
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54 pygame.mixer.music.set_volume(0.3)
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55 pygame.mixer.music.play(-1)
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56