Mercurial > cpython-lru_cache-weakref

annotate Lib/toaiff.py @ 4566:6403c94de50d legacy-trunk

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Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents 560ec7030817
children fd09b3fd1edc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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245003c006a6 Misc changes and new modules. whrandom is "objectified". SOCKET.py
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1 # Convert "arbitrary" sound files to AIFF files (Apple and SGI's audio format).
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2 # Input may be compressed.
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3 # Uncompressed file type may be AIFF, WAV, VOC, 8SVX, NeXT/Sun, and others.
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4 # An exception is raised if the file is not of a recognized type.
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5 # Returned filename is either the input filename or a temporary filename;
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6 # in the latter case the caller must ensure that it is removed.
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7 # Other temporary files used are removed by the function.
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8
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9 import os
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10 import tempfile
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11 import pipes
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12 import whatsound
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13
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14 table = {}
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15
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16 t = pipes.Template()
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17 t.append('sox -t au - -t aiff -r 8000 -', '--')
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18 table['au'] = t
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19
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20 # XXX The following is actually sub-optimal.
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21 # XXX The HCOM sampling rate can be 22k, 22k/2, 22k/3 or 22k/4.
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22 # XXX We must force the output sampling rate else the SGI won't play
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23 # XXX files sampled at 5.5k or 7.333k; however this means that files
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24 # XXX sampled at 11k are unnecessarily expanded.
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25 # XXX Similar comments apply to some other file types.
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26 t = pipes.Template()
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27 t.append('sox -t hcom - -t aiff -r 22050 -', '--')
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28 table['hcom'] = t
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29
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30 t = pipes.Template()
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31 t.append('sox -t voc - -t aiff -r 11025 -', '--')
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32 table['voc'] = t
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33
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34 t = pipes.Template()
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35 t.append('sox -t wav - -t aiff -', '--')
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36 table['wav'] = t
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37
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38 t = pipes.Template()
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39 t.append('sox -t 8svx - -t aiff -r 16000 -', '--')
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40 table['8svx'] = t
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41
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42 t = pipes.Template()
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43 t.append('sox -t sndt - -t aiff -r 16000 -', '--')
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44 table['sndt'] = t
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45
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46 t = pipes.Template()
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47 t.append('sox -t sndr - -t aiff -r 16000 -', '--')
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48 table['sndr'] = t
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49
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50 uncompress = pipes.Template()
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51 uncompress.append('uncompress', '--')
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54 error = 'toaiff.error' # Exception
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56 def toaiff(filename):
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57 temps = []
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58 ret = None
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59 try:
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60 ret = _toaiff(filename, temps)
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61 finally:
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62 for temp in temps[:]:
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63 if temp <> ret:
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64 try:
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65 os.unlink(temp)
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66 except os.error:
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67 pass
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68 temps.remove(temp)
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69 return ret
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70
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71 def _toaiff(filename, temps):
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72 if filename[-2:] == '.Z':
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73 fname = tempfile.mktemp()
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74 temps.append(fname)
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75 sts = uncompress.copy(filename, fname)
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76 if sts:
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77 raise error, filename + ': uncomress failed'
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78 else:
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79 fname = filename
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80 try:
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81 ftype = whatsound.whathdr(fname)
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82 if ftype:
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83 ftype = ftype[0] # All we're interested in
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84 except IOError:
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85 if type(msg) == type(()) and len(msg) == 2 and \
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86 type(msg[0]) == type(0) and type(msg[1]) == type(''):
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87 msg = msg[1]
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88 if type(msg) <> type(''):
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89 msg = `msg`
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90 raise error, filename + ': ' + msg
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91 if ftype == 'aiff':
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92 return fname
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93 if ftype == None or not table.has_key(ftype):
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94 raise error, \
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95 filename + ': unsupported audio file type ' + `ftype`
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96 temp = tempfile.mktemp()
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97 temps.append(temp)
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98 sts = table[ftype].copy(fname, temp)
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99 if sts:
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100 raise error, filename + ': conversion to aiff failed'
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101 return temp