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annotate pytouhou/ui/music.py @ 410:9d790ca73c13

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Don’t render null-sized arrays of elements.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Wed, 12 Jun 2013 16:03:30 +0200
parents d8aab27a2ab2
children b1248bab2d0f
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1 # -*- encoding: utf-8 -*-
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2 ##
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3 ## Copyright (C) 2012 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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4 ##
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5 ## This program is free software; you can redistribute it and/or modify
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6 ## it under the terms of the GNU General Public License as published
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7 ## by the Free Software Foundation; version 3 only.
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8 ##
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9 ## This program is distributed in the hope that it will be useful,
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10 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 ## GNU General Public License for more details.
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13 ##
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14
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15
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16 from os.path import join
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17
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18 from pyglet.media import AudioData, AudioFormat, StaticSource, Player
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19 from pyglet.media.riff import WaveSource
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20
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21
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22 from pytouhou.utils.helpers import get_logger
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23
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24 logger = get_logger(__name__)
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25
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26
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27 class InfiniteWaveSource(WaveSource):
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28 def __init__(self, filename, start, end, file=None):
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29 WaveSource.__init__(self, filename, file)
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30
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31 self._start = self.audio_format.bytes_per_sample * start
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32 self._end = self.audio_format.bytes_per_sample * end
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33
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34 if self._end > self._max_offset:
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35 raise Exception('Music ends after the end of the file.')
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36
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37 self._duration = None
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38
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39
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40 def _get_audio_data(self, bytes):
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41 bytes -= bytes % self.audio_format.bytes_per_sample
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42
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43 data = b''
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44 length = bytes
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45 while True:
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46 size = min(length, self._end - self._offset)
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47 data += self._file.read(size)
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48 if size == length:
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49 break
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50
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51 self._offset = self._start
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52 self._file.seek(self._offset + self._start_offset)
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53 length -= size
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54
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55 self._offset += length
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56
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57 timestamp = float(self._offset) / self.audio_format.bytes_per_second
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58 duration = float(bytes) / self.audio_format.bytes_per_second
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59
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60 return AudioData(data, bytes, timestamp, duration)
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61
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62
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63 def seek(self, timestamp):
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64 raise NotImplementedError('irrelevant')
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65
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66
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67 class ZwavSource(InfiniteWaveSource):
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68 def __init__(self, filename, format, file=None):
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69 if file is None:
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70 file = open(filename, 'rb')
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71
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72 self._file = file
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73
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74 magic = self._file.read(4)
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75 assert b'ZWAV' == magic
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76
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77 self.audio_format = AudioFormat(
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78 channels=format.wChannels,
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79 sample_size=format.wBitsPerSample,
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80 sample_rate=format.dwSamplesPerSec)
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81
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82 self._start_offset = 0
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83 self._offset = format.intro
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84
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85 self._file.seek(self._offset)
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86 self._start = format.intro + format.start
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87 self._end = format.intro + format.duration
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88
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89
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90 class MusicPlayer(object):
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91 def __init__(self, resource_loader, bgms):
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92 self.bgms = []
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93 for bgm in bgms:
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94 if not bgm:
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95 self.bgms.append(None)
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96 continue
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97 posname = bgm[1].replace('bgm/', '').replace('.mid', '.pos')
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98 try:
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99 track = resource_loader.get_track(posname)
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100 except KeyError:
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101 self.bgms.append(None)
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102 logger.warn('Music description not found: %s', posname)
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103 continue
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104 wavname = join(resource_loader.game_dir, bgm[1].replace('.mid', '.wav'))
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105 try:
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106 source = InfiniteWaveSource(wavname, track.start, track.end)
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107 except IOError:
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108 source = None
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109 self.bgms.append(source)
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110
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111 self.player = Player()
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112
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113
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114 def pause(self):
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115 self.player.pause()
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116
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117
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118 def play(self, index):
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119 bgm = self.bgms[index]
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120 if self.player.playing:
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121 self.player.next()
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122 if bgm:
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123 self.player.queue(bgm)
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124 self.player.play()
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125
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126
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127 class SFXPlayer(object):
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128 def __init__(self, loader, volume=.42):
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129 self.loader = loader
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130 self.players = {}
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131 self.sounds = {}
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132 self.volume = volume
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133
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134
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135 def get_player(self, name):
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136 if name not in self.players:
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137 self.players[name] = Player()
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138 self.players[name].volume = self.volume
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139 return self.players[name]
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140
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141
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142 def get_sound(self, name):
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143 if name not in self.sounds:
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144 wave_file = self.loader.get_file(name)
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145 self.sounds[name] = StaticSource(WaveSource(name, wave_file))
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146 return self.sounds[name]
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147
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148
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149 def play(self, name, volume=None):
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150 sound = self.get_sound(name)
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151 player = self.get_player(name)
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152 if volume:
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153 player.volume = volume
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154 if player.playing:
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155 player.next()
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156 if sound:
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157 player.queue(sound)
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158 player.play()
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159
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160
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161 class NullPlayer(object):
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162 def __init__(self, loader=None, bgms=None):
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163 pass
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164
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165
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166 def play(self, name):
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167 pass