1.00 released on Tue 30 Mar 1993	shorten.h changed to allow ANSI prototypes	insertion of Steve Lowes fixes for PC compatibility	Inclusion of the file laplacian.tex	Typo in man page fixed (hl -> lh)1.01 released on Tue 06 Apr 1993	Inclusion of the file change.log	Documentation of the default byte order	Setjmp() moved so as to only be used in embedded applications	Bug in casting to long in word_get() fixed1.02 released on Thu 08 Apr 1993	sizech.c removed in line with allowing sizeof(int) == 2	variable nsd in vario.c:uvar_put() changed to unsigned long	variable uvar in vario.c:var_get() changed to unsigned long	constant 1 changed to 1L in vario.c:var_put()	log(0.0) avoided in lpc.c for pathological cases	check inserted for predictor order being less than the block size	if NEED_TO_GUARANTEE_LPC_STABILITY is defined, it will do just that1.03 released on Mon 12 Apr 1993	resetopt() added to getopt.c and called before getopt() in shorten.c	tables in bitshift.h changed from int to char to reduce executable size	option -d added to discard header bytes on compression/decompression	wav2lpc() fixed so that the returned value "resn" is non-negative1.04 released on Fri 07 May 1993	check added to ensure that the lpc order is less than the buffersize1.05 released on Sat 08 May 1993	option -d fixed to work with pipe input and discard on decompression	bitshift.h removed from the distribution to reduce the size	types uchar and schar typedef'ed in shorten.h and used in bitshift.h1.06 released on Tue 11 May 1993	try to preserve the mode, owner, group, atime and mtime of UNIX files	input file in unlinked if output file was written successfully	array.c created to contan pmalloc() and long2d() which error check1.07 released on Thu 13 May 1993	added the file INSTALL to give installation instructions	fixed a few function declarations that were missing	internal movement within shorten.c in prepration for lossy coding	changed test file to be real speech	change from shar to tar.Z format for distribution	new typdefs ulong and ushort for the obvious things	pmalloc and long2d now take arguments of type ulong1.08 released on Fri 18 Jun 1993	better function prototyping (gcc style) in shorten.h	uchar ushort ulong now #defined to avoid warnings if typedef exists1.09 released on Thu 01 Jul 1993	provisional implementation of -q and -r flags - not finalised	getc_exit and putc_exit macros used in shorten.c	-a for version 2 now copies verbatim (checking for the magic number)	various changes and additions to sphere.c from Jon Fiscus	getopt functions/variables have hs_ prepended to avoid system conflict	dupfileinfo.c renamed to be dupfinfo.c - less than eight characters	memory allocation in fixio.c and vario.c tied up for embedded use1.10 released on Mon 04 Oct 1993	updated man page for -q and -r	exit routines now use varargs and are less verbose	bitshift now prints longs to bitshift.h as %ld	shn109.exe included for the first time1.11 released on Mon 08 Nov 1993	hsgetopt.h deleted - obsoleted by correct definitions in shorten.h	division by zero for null input avoided in lpc.c1.12 released on Wed 23 Feb 1994	out by one bug in lpc.c internal array sizes fixed (-p 64 now works)	magic and version (0 ... 7) numbers merged for SPHERE header parsing	decompression starts when the magic number is found	option -a now allows for alignment prior to during decoding1.13 released on Mon 11 Apr 1994	dupfinfo.c - utime() now called before chmod() and chown()	prototpye for malloc changed to unsigned long	readme.dos created for DOS specific problems	support for stdargs added if HAVE_STDARG_H defined on compilation	exit.c - fprintf(stderr, ": "); perror(NULL) changed to perror("\0")	main.c - DOS pipe output hacked by opening fd 1 "wb" with no buffer	fixio.c - optimisation test for nchan == 0 changed to nchan == 1	shorten.c - changed abs() for labs() as arguements are long, not int	lots of non-functional disambiguation to keep DOS compilation quiet	bitshift.c renamed to mkbshift.c and bitshift.h hardwired in for DOS	shorten.exe included in the distribution	releases now made with mkrelease, *.tar.Z, *.tar.gz. *.zip1.14 released on Mon 08 Aug 1994	ulaw files are now lossy coded by internally converting to linear	better treatment of LPC quantisation errors from version 2	slightly better -h screen	default nmean is 4 as from version 2	fixed stupid bug that corrupted the zip version of shorten.exe1.15 released on Wed 24 Aug 1994	ICASSP94 support code deleted	lpc.c: now pass non-zero mean signal and offset	shorten.c: massive internal reorganisation of compression section	shorten.c: reasonable mean correction when in lossy mode from V 2.01.16 released on Mon 29 Aug 1994	stdlib.h and string.h now assumed to exist	lpc.c: fix bug which malloced too few bytes (introduced in 1.16)1.17 released on Wed 31 Aug 19941.18 released on Sat 03 Sep 1994 (by mistake)	lossy compression to a given segmental SNR is now supported (-n)	man page rewritten and updated to support lossy compression	the au file type option is has been renamed ulaw (au is still valid)	filetimes on the DOS release now match those on the UNIX release	v2: maximum lpc order searched is the best previous value plus two	PC compilation moved from XT/tcc to 486/gcc and Makefile.dos deleted1.19 released on Mon 03 Oct 1994	spurious labs() in poly.c swapped for abs	change all #ifdef unix for #ifndef MSDOS as djgpp #defs unix1.20 released on Mon 17 Oct 1994	bcc supported again as the executable is smaller (so labs() is back)1.21 released on Mon 14 Nov 1994	option -l implemented to print the contents of the LICENSE file	technical report 156 added as files tr156.tex and tr156.ps	man page updated	support added for the WATCOM compiler from fred@masterd.fdn.org	mkrelease and Change.log renamed to release and change.log	shorten.c: very minor change in lossy coding with -n (2.0 -> 25.0/12.0)	MSDOS stdin/stdout binary mode fiddling moved from main.c to shorten.c	linear2ulaw(int) changed to linear2ulaw(long)	old XT compatable executable renamed shorten.0861.22 released on Tue 10 Jan 1995	shorten.c: bug with FN_ZERO fixed - no longer look for more bitshifts	exit.c: basic_exit() - delete output file if abnormal termination	shorten.1: warn about lossy coding of unsigned data with offset	shorten.c: new flag, -u, maps both ulaw zeros onto the positive zero	v2: new type for lossless ulaw, TYPE_AU2, for two zero ulaw data1.23 released on Fri 14 Jul 1995	minor documenation changes2.0  released on Sun 27 Aug 1995	lpc.c: round quantised coefficents to the nearest integer	*.c: numerous casts to avoid warnings with Visual C/C++	shorten.1: changed format of bit table	ulaw.c: replaced with Sulawalaw.c	alaw support: much like ulaw except no zero merge or fancy bitshift()	shorten.c: help screen left shifted by six chars to accomodate "alaw,"	Limited WINDOWS support added	slight optimisation when frame is all zero (don't change bitshift)	shorten.c: bug fixed when FN_QLPC called after FN_ZERO	fixio.c:signed values close to max were converted to min when quantised	BUGFIX_RELEASE definition moved from Makefile to shorten.h	old ANNOUNCE file deleted and minor changes to INSTALL	shorten.mak:  Default DOS compiler changed from BCC to MS Visual C++	Makefile/release:  now take BUGFIX_RELEASE from shorten.h	Makefile: no longer delete bitshift.h on clean/spotless2.1  released on Mon 26 Feb 1996	lpc.c: a bug disabled the early stopping on the search for LP order	shorten.c: silly bug in ordering of arguments in a rare printf()	shorten.c: redundant variable/storage buffer1 removed	shorten.1: Document bugs in the tech report on Rice coding	-t is now honoured (where possible) to convert file types on decode	Makefile updated to be more package friendly (James Christie)2.2  released on Mon 10 Mar 1997        New -t option "wav" for RIFF WAVE files (automatic selection of -t)	-t wav now the default - man page and shntest updated, mvs_s16 renamed	script release renamed mkRelease to avoid MS VC++ name conflict	setjump() bugfixes for embedded operation (Martin Saxon)	New windows DLL operation (Martin Saxon)2.3  released on Thu 04 Sep 1997	exit.c: system dependence on *sys_errlist[] changed to strerror()	SHORTEN.086, SHORTEN.EXE and shortn32.exe removed	Some Debian support2.3a released on Fri 26 Feb 1999	3.0  released on Fri 29 Sep 2000	Seek table extensions by Wayne Stielau	Unix backport of seek table extensions by Jason Jordan	Debian support improvements by Caleb Epstein3.1  released on Tue 10 Oct 2000	Seek table append option 'fixed'	Documentation updated3.2  released on Sat 13 Jan 2001	Added '-i' switch to display whether a file contains seek information	Cleaned up endian-conversion code	Fixed a file naming bug - now, when only an input file name is given,	output files are named according to the following rules:		If shortening a file:			If the input file name ends in .wav, then change			extension to .shn; otherwise, append .shn to the			input file name.  Examples:				file.wav  ->  file.shn				file.ext  ->  file.ext.shn		If extracting a file:			If the input file name ends in .shn, then change			extension to .wav; otherwise, append .wav to the			input file name.				file.shn  ->  file.wav				file.ext  ->  file.ext.wav	When the caller specifies -v2 on the command line, seek tables are	not generated (neither appended nor created in separate files).	The default behavior is to generate/append seek tables.3.3  released on Sun 12 Aug 2001	Converted to autoconf/automake build system	Made seek table code 64-bit clean	Changed seek table data structures to compensate for compilers that don't	  properly implement #pragma pack(1)	Various minor cleanups/updates that don't impact the shorten algorithm3.4  released on Sun 10 Feb 2002	Fix for reading/writing binary data on stdin/stdout for operating systems	  that do not have a single '\x0A' as a line separator (Frank Klemm)	Shorten now refuses to input data from or output data to a tty	Fixed crash when trying to create seek tables from a non-shorten file	-s and -S options can now create seek table files from data read on stdin	  (with -s, output filename is 'stdin.skt')	Seek tables are now appended to non-stdout output file when reading	  uncompressed data from stdin (e.g. shorten - outfile.shn < data.wav)3.5.0  released on Mon 18 Nov 2002	Support for compression of AIFF files contributed by Brian Willoughby of	  Sound Consulting	Changed file naming convention during extraction - when only an input file	  name is given, output files are named according to the following rules:			If the input file name contains more than one '.' and			ends in .shn, then drop the .shn; otherwise, if the input			file name ends in .shn, then change the extension to .wav;			otherwise, append .wav to the input file name.				file.aiff.shn  ->  file.aiff				file.aiff.ext  ->  file.aiff.ext.wav				file.shn       ->  file.wav				file.ext       ->  file.ext.wav	  This change was made so that non-wav files would be properly named after	  shortening and unshortening.  For example, 'shorten file.aiff' creates	  file.aiff.shn, and with the change above, 'shorten -x file.aiff.shn'	  will now create file.aiff (instead of file.aiff.wav).3.5.1  released Wed 12 Feb 2003	Minor AIFF spec compliance updates