Initial commit of OpenSPARC T2 design and verification files.

[OpenSPARC-T2-DV] / tools / src / nas,5.n2.os.2 / lib / python / lib / python2.4 / toaiff.py

"""Convert "arbitrary" sound files to AIFF (Apple and SGI's audio format).

Input may be compressed.
Uncompressed file type may be AIFF, WAV, VOC, 8SVX, NeXT/Sun, and others.
An exception is raised if the file is not of a recognized type.
Returned filename is either the input filename or a temporary filename;
in the latter case the caller must ensure that it is removed.
Other temporary files used are removed by the function.
"""

import os
import tempfile
import pipes
import sndhdr

__all__ = ["error", "toaiff"]

table = {}

t = pipes.Template()
t.append('sox -t au - -t aiff -r 8000 -', '--')
table['au'] = t

# XXX The following is actually sub-optimal.
# XXX The HCOM sampling rate can be 22k, 22k/2, 22k/3 or 22k/4.
# XXX We must force the output sampling rate else the SGI won't play
# XXX files sampled at 5.5k or 7.333k; however this means that files
# XXX sampled at 11k are unnecessarily expanded.
# XXX Similar comments apply to some other file types.
t = pipes.Template()
t.append('sox -t hcom - -t aiff -r 22050 -', '--')
table['hcom'] = t

t = pipes.Template()
t.append('sox -t voc - -t aiff -r 11025 -', '--')
table['voc'] = t

t = pipes.Template()
t.append('sox -t wav - -t aiff -', '--')
table['wav'] = t

t = pipes.Template()
t.append('sox -t 8svx - -t aiff -r 16000 -', '--')
table['8svx'] = t

t = pipes.Template()
t.append('sox -t sndt - -t aiff -r 16000 -', '--')
table['sndt'] = t

t = pipes.Template()
t.append('sox -t sndr - -t aiff -r 16000 -', '--')
table['sndr'] = t

uncompress = pipes.Template()
uncompress.append('uncompress', '--')


class error(Exception):
   pass

def toaiff(filename):
   temps = []
   ret = None
   try:
       ret = _toaiff(filename, temps)
   finally:
       for temp in temps[:]:
           if temp != ret:
               try:
                   os.unlink(temp)
               except os.error:
                   pass
               temps.remove(temp)
   return ret

def _toaiff(filename, temps):
   if filename[-2:] == '.Z':
       (fd, fname) = tempfile.mkstemp()
       os.close(fd)
       temps.append(fname)
       sts = uncompress.copy(filename, fname)
       if sts:
           raise error, filename + ': uncompress failed'
   else:
       fname = filename
   try:
       ftype = sndhdr.whathdr(fname)
       if ftype:
           ftype = ftype[0] # All we're interested in
   except IOError, msg:
       if type(msg) == type(()) and len(msg) == 2 and \
               type(msg[0]) == type(0) and type(msg[1]) == type(''):
           msg = msg[1]
       if type(msg) != type(''):
           msg = repr(msg)
       raise error, filename + ': ' + msg
   if ftype == 'aiff':
       return fname
   if ftype is None or not ftype in table:
       raise error, '%s: unsupported audio file type %r' % (filename, ftype)
   (fd, temp) = tempfile.mkstemp()
   os.close(fd)
   temps.append(temp)
   sts = table[ftype].copy(fname, temp)
   if sts:
       raise error, filename + ': conversion to aiff failed'
   return temp