def METHOD_NAME(h, f):
    import aifc
    if h[:4] != 'FORM':
        return None
    if h[8:12] == 'AIFC':
        fmt = 'aifc'
    elif h[8:12] == 'AIFF':
        fmt = 'aiff'
    else:
        return None
    f.seek(0)
    try:
        a = aifc.openfp(f, 'r')
    except (EOFError, aifc.Error):
        return None
    return (fmt, a.getframerate(), a.getnchannels(), \
            a.getnframes(), 8*a.getsampwidth())