102 lines
2.6 KiB
Python
102 lines
2.6 KiB
Python
# Convert "arbitrary" sound files to AIFF files (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
|
|
|
|
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', '--')
|
|
|
|
|
|
error = 'toaiff.error' # Exception
|
|
|
|
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':
|
|
fname = tempfile.mktemp()
|
|
temps.append(fname)
|
|
sts = uncompress.copy(filename, fname)
|
|
if sts:
|
|
raise error, filename + ': uncomress failed'
|
|
else:
|
|
fname = filename
|
|
try:
|
|
ftype = sndhdr.whathdr(fname)
|
|
if ftype:
|
|
ftype = ftype[0] # All we're interested in
|
|
except IOError:
|
|
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 = `msg`
|
|
raise error, filename + ': ' + msg
|
|
if ftype == 'aiff':
|
|
return fname
|
|
if ftype == None or not table.has_key(ftype):
|
|
raise error, \
|
|
filename + ': unsupported audio file type ' + `ftype`
|
|
temp = tempfile.mktemp()
|
|
temps.append(temp)
|
|
sts = table[ftype].copy(fname, temp)
|
|
if sts:
|
|
raise error, filename + ': conversion to aiff failed'
|
|
return temp
|