Mercurial > cpython-lru_cache-weakref

annotate Lib/sunaudio.py @ 58925:eecf1bef052d 2.6

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Merged revisions 78207 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r78207 | ezio.melotti | 2010-02-17 01:26:09 +0200 (Wed, 17 Feb 2010) | 1 line #7930: fix stripid ........
author Ezio Melotti <ezio.melotti@gmail.com>
date Tue, 16 Feb 2010 23:29:44 +0000
parents f9040d107d66
children
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rev   line source
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6f4146846337 The third and final doc-string sweep by Ka-Ping Yee.
Guido van Rossum <guido@python.org>
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1 """Interpret sun audio headers."""
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Brett Cannon <bcannon@gmail.com>
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2 from warnings import warnpy3k
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3 warnpy3k("the sunaudio module has been removed in Python 3.0; "
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4 "use the sunau module instead", stacklevel=2)
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5 del warnpy3k
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7
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8 MAGIC = '.snd'
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9
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10 class error(Exception):
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11 pass
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13
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14 def get_long_be(s):
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15 """Convert a 4-char value to integer."""
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16 return (ord(s[0])<<24) | (ord(s[1])<<16) | (ord(s[2])<<8) | ord(s[3])
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19 def gethdr(fp):
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20 """Read a sound header from an open file."""
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21 if fp.read(4) != MAGIC:
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22 raise error, 'gethdr: bad magic word'
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23 hdr_size = get_long_be(fp.read(4))
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24 data_size = get_long_be(fp.read(4))
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25 encoding = get_long_be(fp.read(4))
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26 sample_rate = get_long_be(fp.read(4))
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27 channels = get_long_be(fp.read(4))
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28 excess = hdr_size - 24
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29 if excess < 0:
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30 raise error, 'gethdr: bad hdr_size'
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31 if excess > 0:
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32 info = fp.read(excess)
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33 else:
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34 info = ''
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35 return (data_size, encoding, sample_rate, channels, info)
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38 def printhdr(file):
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39 """Read and print the sound header of a named file."""
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40 hdr = gethdr(open(file, 'r'))
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41 data_size, encoding, sample_rate, channels, info = hdr
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42 while info[-1:] == '\0':
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43 info = info[:-1]
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44 print 'File name: ', file
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45 print 'Data size: ', data_size
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46 print 'Encoding: ', encoding
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47 print 'Sample rate:', sample_rate
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48 print 'Channels: ', channels
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49 print 'Info: ', repr(info)