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      1 """Convert "arbitrary" sound files to AIFF (Apple and SGI's audio format).
      2 
      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.
      9 """
     10 from warnings import warnpy3k
     11 warnpy3k("the toaiff module has been removed in Python 3.0", stacklevel=2)
     12 del warnpy3k
     13 
     14 import os
     15 import tempfile
     16 import pipes
     17 import sndhdr
     18 
     19 __all__ = ["error", "toaiff"]
     20 
     21 table = {}
     22 
     23 t = pipes.Template()
     24 t.append('sox -t au - -t aiff -r 8000 -', '--')
     25 table['au'] = t
     26 
     27 # XXX The following is actually sub-optimal.
     28 # XXX The HCOM sampling rate can be 22k, 22k/2, 22k/3 or 22k/4.
     29 # XXX We must force the output sampling rate else the SGI won't play
     30 # XXX files sampled at 5.5k or 7.333k; however this means that files
     31 # XXX sampled at 11k are unnecessarily expanded.
     32 # XXX Similar comments apply to some other file types.
     33 t = pipes.Template()
     34 t.append('sox -t hcom - -t aiff -r 22050 -', '--')
     35 table['hcom'] = t
     36 
     37 t = pipes.Template()
     38 t.append('sox -t voc - -t aiff -r 11025 -', '--')
     39 table['voc'] = t
     40 
     41 t = pipes.Template()
     42 t.append('sox -t wav - -t aiff -', '--')
     43 table['wav'] = t
     44 
     45 t = pipes.Template()
     46 t.append('sox -t 8svx - -t aiff -r 16000 -', '--')
     47 table['8svx'] = t
     48 
     49 t = pipes.Template()
     50 t.append('sox -t sndt - -t aiff -r 16000 -', '--')
     51 table['sndt'] = t
     52 
     53 t = pipes.Template()
     54 t.append('sox -t sndr - -t aiff -r 16000 -', '--')
     55 table['sndr'] = t
     56 
     57 uncompress = pipes.Template()
     58 uncompress.append('uncompress', '--')
     59 
     60 
     61 class error(Exception):
     62     pass
     63 
     64 def toaiff(filename):
     65     temps = []
     66     ret = None
     67     try:
     68         ret = _toaiff(filename, temps)
     69     finally:
     70         for temp in temps[:]:
     71             if temp != ret:
     72                 try:
     73                     os.unlink(temp)
     74                 except os.error:
     75                     pass
     76                 temps.remove(temp)
     77     return ret
     78 
     79 def _toaiff(filename, temps):
     80     if filename[-2:] == '.Z':
     81         (fd, fname) = tempfile.mkstemp()
     82         os.close(fd)
     83         temps.append(fname)
     84         sts = uncompress.copy(filename, fname)
     85         if sts:
     86             raise error, filename + ': uncompress failed'
     87     else:
     88         fname = filename
     89     try:
     90         ftype = sndhdr.whathdr(fname)
     91         if ftype:
     92             ftype = ftype[0] # All we're interested in
     93     except IOError, msg:
     94         if type(msg) == type(()) and len(msg) == 2 and \
     95                 type(msg[0]) == type(0) and type(msg[1]) == type(''):
     96             msg = msg[1]
     97         if type(msg) != type(''):
     98             msg = repr(msg)
     99         raise error, filename + ': ' + msg
    100     if ftype == 'aiff':
    101         return fname
    102     if ftype is None or not ftype in table:
    103         raise error, '%s: unsupported audio file type %r' % (filename, ftype)
    104     (fd, temp) = tempfile.mkstemp()
    105     os.close(fd)
    106     temps.append(temp)
    107     sts = table[ftype].copy(fname, temp)
    108     if sts:
    109         raise error, filename + ': conversion to aiff failed'
    110     return temp
    111