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authorrahulp132020-03-17 14:55:41 +0530
committerrahulp132020-03-17 14:55:41 +0530
commit296443137f4288cb030e92859ccfbe3204bc1088 (patch)
treeca4798c2da1e7244edc3bc108d81b462b537aea2 /lib/python2.7/toaiff.py
parent0db48f6533517ecebfd9f0693f89deca28408b76 (diff)
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+"""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.
+"""
+from warnings import warnpy3k
+warnpy3k("the toaiff module has been removed in Python 3.0", stacklevel=2)
+del warnpy3k
+
+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