1 """Convert "arbitrary" sound files to AIFF (Apple and SGI's audio format).
3 Input may be compressed.
4 Uncompressed file type may be AIFF, WAV, VOC, 8SVX, NeXT/Sun, and others.
5 An exception is raised if the file is not of a recognized type.
6 Returned filename is either the input filename or a temporary filename;
7 in the latter case the caller must ensure that it is removed.
8 Other temporary files used are removed by the function.
16 __all__ = ["error", "toaiff"]
21 t.append('sox -t au - -t aiff -r 8000 -', '--')
24 # XXX The following is actually sub-optimal.
25 # XXX The HCOM sampling rate can be 22k, 22k/2, 22k/3 or 22k/4.
26 # XXX We must force the output sampling rate else the SGI won't play
27 # XXX files sampled at 5.5k or 7.333k; however this means that files
28 # XXX sampled at 11k are unnecessarily expanded.
29 # XXX Similar comments apply to some other file types.
31 t.append('sox -t hcom - -t aiff -r 22050 -', '--')
35 t.append('sox -t voc - -t aiff -r 11025 -', '--')
39 t.append('sox -t wav - -t aiff -', '--')
43 t.append('sox -t 8svx - -t aiff -r 16000 -', '--')
47 t.append('sox -t sndt - -t aiff -r 16000 -', '--')
51 t.append('sox -t sndr - -t aiff -r 16000 -', '--')
54 uncompress = pipes.Template()
55 uncompress.append('uncompress', '--')
58 class error(Exception):
65 ret = _toaiff(filename, temps)
76 def _toaiff(filename, temps):
77 if filename[-2:] == '.Z':
78 (fd, fname) = tempfile.mkstemp()
81 sts = uncompress.copy(filename, fname)
83 raise error, filename + ': uncompress failed'
87 ftype = sndhdr.whathdr(fname)
89 ftype = ftype[0] # All we're interested in
91 if type(msg) == type(()) and len(msg) == 2 and \
92 type(msg[0]) == type(0) and type(msg[1]) == type(''):
94 if type(msg) != type(''):
96 raise error, filename + ': ' + msg
99 if ftype is None or not ftype in table:
100 raise error, '%s: unsupported audio file type %r' % (filename, ftype)
101 (fd, temp) = tempfile.mkstemp()
104 sts = table[ftype].copy(fname, temp)
106 raise error, filename + ': conversion to aiff failed'