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"""Interpret sun audio headers.""" from warnings import warnpy3k warnpy3k("the sunaudio module has been removed in Python 3.0; " "use the sunau module instead", stacklevel=2) del warnpy3k MAGIC = '.snd' class error(Exception): pass def get_long_be(s): """Convert a 4-char value to integer.""" return (ord(s[0])<<24) | (ord(s[1])<<16) | (ord(s[2])<<8) | ord(s[3]) def gethdr(fp): """Read a sound header from an open file.""" if fp.read(4) != MAGIC: raise error, 'gethdr: bad magic word' hdr_size = get_long_be(fp.read(4)) data_size = get_long_be(fp.read(4)) encoding = get_long_be(fp.read(4)) sample_rate = get_long_be(fp.read(4)) channels = get_long_be(fp.read(4)) excess = hdr_size - 24 if excess < 0: raise error, 'gethdr: bad hdr_size' if excess > 0: info = fp.read(excess) else: info = '' return (data_size, encoding, sample_rate, channels, info) def printhdr(file): """Read and print the sound header of a named file.""" hdr = gethdr(open(file, 'r'))