diff src/libsndfile-1.0.25/tests/lossy_comp_test.c @ 0:c7265573341e

Import initial set of sources

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/libsndfile-1.0.25/tests/lossy_comp_test.c	Mon Mar 18 14:12:14 2013 +0000
@@ -0,0 +1,2371 @@
+/*
+** Copyright (C) 1999-2011 Erik de Castro Lopo <[e-mail]>
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include "sfconfig.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <sndfile.h>
+
+#include "utils.h"
+
+#define	BUFFER_SIZE		(1<<14) /* Should be (1<<14) */
+#define	SAMPLE_RATE		11025
+
+#ifndef		M_PI
+#define		M_PI		3.14159265358979323846264338
+#endif
+
+#define		LCT_MAX(x,y)	((x) > (y) ? (x) : (y))
+
+static	void	lcomp_test_short	(const char *filename, int filetype, int chan, double margin) ;
+static	void	lcomp_test_int		(const char *filename, int filetype, int chan, double margin) ;
+static	void	lcomp_test_float	(const char *filename, int filetype, int chan, double margin) ;
+static	void	lcomp_test_double	(const char *filename, int filetype, int chan, double margin) ;
+
+static	void	sdlcomp_test_short	(const char *filename, int filetype, int chan, double margin) ;
+static	void	sdlcomp_test_int	(const char *filename, int filetype, int chan, double margin) ;
+static	void	sdlcomp_test_float	(const char *filename, int filetype, int chan, double margin) ;
+static	void	sdlcomp_test_double	(const char *filename, int filetype, int chan, double margin) ;
+
+static void		read_raw_test (const char *filename, int filetype, int chan) ;
+
+static	int		error_function (double data, double orig, double margin) ;
+static	int		decay_response (int k) ;
+
+static	void	gen_signal_double (double *data, double scale, int channels, int datalen) ;
+
+static	void	smoothed_diff_short (short *data, unsigned int datalen) ;
+static	void	smoothed_diff_int (int *data, unsigned int datalen) ;
+static	void	smoothed_diff_float (float *data, unsigned int datalen) ;
+static	void	smoothed_diff_double (double *data, unsigned int datalen) ;
+
+static void		check_comment (SNDFILE * file, int format, int lineno) ;
+
+static int		is_lossy (int filetype) ;
+
+/*
+** Force the start of these buffers to be double aligned. Sparc-solaris will
+** choke if they are not.
+*/
+typedef union
+{	double	d [BUFFER_SIZE + 1] ;
+	float	f [BUFFER_SIZE + 1] ;
+	int		i [BUFFER_SIZE + 1] ;
+	short	s [BUFFER_SIZE + 1] ;
+	char	c [BUFFER_SIZE + 1] ;
+} BUFFER ;
+
+static	BUFFER	data_buffer ;
+static	BUFFER	orig_buffer ;
+static	BUFFER	smooth_buffer ;
+
+static const char *long_comment =
+	"This is really quite a long comment. It is designed to be long enough "
+	"to screw up the encoders and decoders if the file container format does "
+	"not handle things correctly. If everything is working correctly, the "
+	"decoder will only decode the actual audio data, and not this string at "
+	"the end of the file." ;
+
+int
+main (int argc, char *argv [])
+{	int		do_all = 0 ;
+	int		test_count = 0 ;
+
+	if (argc != 2)
+	{	printf ("Usage : %s <test>\n", argv [0]) ;
+		printf ("    Where <test> is one of the following:\n") ;
+		printf ("           wav_ima     - test IMA ADPCM WAV file functions\n") ;
+		printf ("           wav_msadpcm - test MS ADPCM WAV file functions\n") ;
+		printf ("           wav_gsm610  - test GSM 6.10 WAV file functions\n") ;
+		printf ("           wav_ulaw    - test u-law WAV file functions\n") ;
+		printf ("           wav_alaw    - test A-law WAV file functions\n") ;
+		printf ("           wve         - test Psion WVE file functions\n") ;
+		printf ("           all         - perform all tests\n") ;
+		exit (1) ;
+		} ;
+
+	do_all = ! strcmp (argv [1], "all") ;
+
+	if (do_all || strcmp (argv [1], "wav_pcm") == 0)
+	{	/* This is just a sanity test for PCM encoding. */
+		lcomp_test_short	("pcm.wav", SF_FORMAT_WAV | SF_FORMAT_PCM_16, 2, 1e-50) ;
+		lcomp_test_int		("pcm.wav", SF_FORMAT_WAV | SF_FORMAT_PCM_32, 2, 1e-50) ;
+		lcomp_test_short	("pcm.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_PCM_16, 2, 1e-50) ;
+		lcomp_test_int		("pcm.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_PCM_32, 2, 1e-50) ;
+		/* Lite remove start */
+		lcomp_test_float	("pcm.wav", SF_FORMAT_WAV | SF_FORMAT_FLOAT, 2, 1e-50) ;
+		lcomp_test_double	("pcm.wav", SF_FORMAT_WAV | SF_FORMAT_DOUBLE, 2, 1e-50) ;
+		/* Lite remove end */
+
+		read_raw_test ("pcm.wav", SF_FORMAT_WAV | SF_FORMAT_PCM_U8, 2) ;
+		test_count++ ;
+		} ;
+
+	/* For all the rest, if the file format supports more than 1 channel, use stereo. */
+	/* Lite remove start */
+	if (do_all || strcmp (argv [1], "wav_ima") == 0)
+	{	lcomp_test_short	("ima.wav", SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		lcomp_test_int		("ima.wav", SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.65) ;
+		lcomp_test_float	("ima.wav", SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		lcomp_test_double	("ima.wav", SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+
+		lcomp_test_short	("ima.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		lcomp_test_int		("ima.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		lcomp_test_float	("ima.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		lcomp_test_double	("ima.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+
+		sdlcomp_test_short	("ima.wav", SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		sdlcomp_test_int	("ima.wav", SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		sdlcomp_test_float	("ima.wav", SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		sdlcomp_test_double	("ima.wav", SF_FORMAT_WAV | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "wav_msadpcm") == 0)
+	{	lcomp_test_short	("msadpcm.wav", SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		lcomp_test_int		("msadpcm.wav", SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		lcomp_test_float	("msadpcm.wav", SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		lcomp_test_double	("msadpcm.wav", SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+
+		lcomp_test_short	("msadpcm.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		lcomp_test_int		("msadpcm.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		lcomp_test_float	("msadpcm.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		lcomp_test_double	("msadpcm.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+
+		sdlcomp_test_short	("msadpcm.wav", SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		sdlcomp_test_int	("msadpcm.wav", SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		sdlcomp_test_float	("msadpcm.wav", SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		sdlcomp_test_double	("msadpcm.wav", SF_FORMAT_WAV | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "wav_g721") == 0)
+	{	printf ("**** Fix this later : error bound should be 0.06 ****\n") ;
+		lcomp_test_short	("g721.wav", SF_FORMAT_WAV | SF_FORMAT_G721_32, 1, 0.7) ;
+		lcomp_test_int		("g721.wav", SF_FORMAT_WAV | SF_FORMAT_G721_32, 1, 0.7) ;
+
+		lcomp_test_short	("g721.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_G721_32, 1, 0.7) ;
+		lcomp_test_int		("g721.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_G721_32, 1, 0.7) ;
+
+		test_count++ ;
+		} ;
+	/* Lite remove end */
+
+	if (do_all || strcmp (argv [1], "wav_ulaw") == 0)
+	{	lcomp_test_short	("ulaw.wav", SF_FORMAT_WAV | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_int		("ulaw.wav", SF_FORMAT_WAV | SF_FORMAT_ULAW, 2, 0.04) ;
+
+		lcomp_test_short	("ulaw.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_int		("ulaw.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_ULAW, 2, 0.04) ;
+
+		/* Lite remove start */
+		lcomp_test_float	("ulaw.wav", SF_FORMAT_WAV | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_double	("ulaw.wav", SF_FORMAT_WAV | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove end */
+
+		read_raw_test ("ulaw.wav", SF_FORMAT_WAV | SF_FORMAT_ULAW, 2) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "wav_alaw") == 0)
+	{	lcomp_test_short	("alaw.wav", SF_FORMAT_WAV | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_int		("alaw.wav", SF_FORMAT_WAV | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("alaw.wav", SF_FORMAT_WAV | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_double	("alaw.wav", SF_FORMAT_WAV | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove end */
+
+		read_raw_test ("alaw.wav", SF_FORMAT_WAV | SF_FORMAT_ALAW, 2) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "wav_gsm610") == 0)
+	{	/* Don't do lcomp_test_XXX as the errors are too big. */
+		sdlcomp_test_short	("gsm610.wav", SF_FORMAT_WAV | SF_FORMAT_GSM610, 1, 0.24) ;
+		sdlcomp_test_int	("gsm610.wav", SF_FORMAT_WAV | SF_FORMAT_GSM610, 1, 0.24) ;
+
+		sdlcomp_test_short	("gsm610.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_GSM610, 1, 0.24) ;
+		sdlcomp_test_int	("gsm610.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV | SF_FORMAT_GSM610, 1, 0.24) ;
+
+		/* Lite remove start */
+		sdlcomp_test_float	("gsm610.wav", SF_FORMAT_WAV | SF_FORMAT_GSM610, 1, 0.24) ;
+		sdlcomp_test_double	("gsm610.wav", SF_FORMAT_WAV | SF_FORMAT_GSM610, 1, 0.24) ;
+		/* Lite remove end */
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "aiff_ulaw") == 0)
+	{	lcomp_test_short	("ulaw.aiff", SF_FORMAT_AIFF | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_int		("ulaw.aiff", SF_FORMAT_AIFF | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("ulaw.aiff", SF_FORMAT_AIFF | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_double	("ulaw.aiff", SF_FORMAT_AIFF | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove end */
+
+		read_raw_test ("ulaw.aiff", SF_FORMAT_AIFF | SF_FORMAT_ULAW, 2) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "aiff_alaw") == 0)
+	{	lcomp_test_short	("alaw.aiff", SF_FORMAT_AIFF | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_int		("alaw.aiff", SF_FORMAT_AIFF | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("alaw.aiff", SF_FORMAT_AIFF | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_double	("alaw.aiff", SF_FORMAT_AIFF | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove end */
+
+		read_raw_test ("alaw.aiff", SF_FORMAT_AIFF | SF_FORMAT_ALAW, 2) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "aiff_gsm610") == 0)
+	{	/* Don't do lcomp_test_XXX as the errors are too big. */
+		sdlcomp_test_short	("gsm610.aiff", SF_FORMAT_AIFF | SF_FORMAT_GSM610, 1, 0.24) ;
+		sdlcomp_test_int	("gsm610.aiff", SF_FORMAT_AIFF | SF_FORMAT_GSM610, 1, 0.24) ;
+		/* Lite remove start */
+		sdlcomp_test_float	("gsm610.aiff", SF_FORMAT_AIFF | SF_FORMAT_GSM610, 1, 0.24) ;
+		sdlcomp_test_double	("gsm610.aiff", SF_FORMAT_AIFF | SF_FORMAT_GSM610, 1, 0.24) ;
+		/* Lite remove end */
+		test_count++ ;
+		} ;
+
+	if (strcmp (argv [1], "aiff_ima") == 0)
+	{	lcomp_test_short	("ima.aiff", SF_FORMAT_AIFF | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		lcomp_test_int		("ima.aiff", SF_FORMAT_AIFF | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		/* Lite remove start */
+		lcomp_test_float	("ima.aiff", SF_FORMAT_AIFF | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		lcomp_test_double	("ima.aiff", SF_FORMAT_AIFF | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		/* Lite remove end */
+		} ;
+
+	if (do_all || strcmp (argv [1], "au_ulaw") == 0)
+	{	lcomp_test_short	("ulaw.au", SF_ENDIAN_BIG		| SF_FORMAT_AU | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_int		("ulaw.au", SF_ENDIAN_LITTLE	| SF_FORMAT_AU | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("ulaw.au", SF_ENDIAN_LITTLE	| SF_FORMAT_AU | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_double	("ulaw.au", SF_ENDIAN_BIG		| SF_FORMAT_AU | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove end */
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "au_alaw") == 0)
+	{	lcomp_test_short	("alaw.au", SF_ENDIAN_LITTLE	| SF_FORMAT_AU | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_int		("alaw.au", SF_ENDIAN_BIG		| SF_FORMAT_AU | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("alaw.au", SF_ENDIAN_BIG		| SF_FORMAT_AU | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_double	("alaw.au", SF_ENDIAN_LITTLE	| SF_FORMAT_AU | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove end */
+		test_count++ ;
+		} ;
+
+	/* Lite remove start */
+	if (do_all || strcmp (argv [1], "au_g721") == 0)
+	{	printf ("**** Fix this later : error bound should be 0.06 ****\n") ;
+		lcomp_test_short	("g721.au", SF_ENDIAN_LITTLE	| SF_FORMAT_AU | SF_FORMAT_G721_32, 1, 0.7) ;
+		lcomp_test_int		("g721.au", SF_ENDIAN_BIG		| SF_FORMAT_AU | SF_FORMAT_G721_32, 1, 0.7) ;
+		lcomp_test_float	("g721.au", SF_ENDIAN_LITTLE 	| SF_FORMAT_AU | SF_FORMAT_G721_32, 1, 0.7) ;
+		lcomp_test_double	("g721.au", SF_ENDIAN_BIG		| SF_FORMAT_AU | SF_FORMAT_G721_32, 1, 0.7) ;
+
+/*-		sdlcomp_test_short	("g721.au", SF_ENDIAN_BIG    | SF_FORMAT_AU | SF_FORMAT_G721_32, 1, 0.07) ;
+		sdlcomp_test_int	("g721.au", SF_ENDIAN_LITTLE | SF_FORMAT_AU | SF_FORMAT_G721_32, 1, 0.07) ;
+		sdlcomp_test_float  ("g721.au", SF_ENDIAN_BIG    | SF_FORMAT_AU | SF_FORMAT_G721_32, 1, 0.07) ;
+		sdlcomp_test_double	("g721.au", SF_ENDIAN_LITTLE | SF_FORMAT_AU | SF_FORMAT_G721_32, 1, 0.12) ;
+-*/
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "au_g723") == 0)
+	{	printf ("**** Fix this later : error bound should be 0.16 ****\n") ;
+		lcomp_test_short	("g723_24.au", SF_ENDIAN_LITTLE	| SF_FORMAT_AU | SF_FORMAT_G723_24, 1, 0.7) ;
+		lcomp_test_int		("g723_24.au", SF_ENDIAN_BIG	| SF_FORMAT_AU | SF_FORMAT_G723_24, 1, 0.7) ;
+		lcomp_test_float	("g723_24.au", SF_ENDIAN_LITTLE | SF_FORMAT_AU | SF_FORMAT_G723_24, 1, 0.7) ;
+		lcomp_test_double	("g723_24.au", SF_ENDIAN_BIG	| SF_FORMAT_AU | SF_FORMAT_G723_24, 1, 0.7) ;
+
+		lcomp_test_short	("g723_40.au", SF_ENDIAN_LITTLE | SF_FORMAT_AU | SF_FORMAT_G723_40, 1, 0.85) ;
+		lcomp_test_int		("g723_40.au", SF_ENDIAN_BIG	| SF_FORMAT_AU | SF_FORMAT_G723_40, 1, 0.84) ;
+		lcomp_test_float	("g723_40.au", SF_ENDIAN_LITTLE | SF_FORMAT_AU | SF_FORMAT_G723_40, 1, 0.86) ;
+		lcomp_test_double	("g723_40.au", SF_ENDIAN_BIG	| SF_FORMAT_AU | SF_FORMAT_G723_40, 1, 0.86) ;
+
+/*-		sdlcomp_test_short	("g723.au", SF_ENDIAN_BIG    | SF_FORMAT_AU | SF_FORMAT_G723_24, 1, 0.15) ;
+		sdlcomp_test_int	("g723.au", SF_ENDIAN_LITTLE | SF_FORMAT_AU | SF_FORMAT_G723_24, 1, 0.15) ;
+		sdlcomp_test_float	("g723.au", SF_ENDIAN_BIG    | SF_FORMAT_AU | SF_FORMAT_G723_24, 1, 0.15) ;
+		sdlcomp_test_double	("g723.au", SF_ENDIAN_LITTLE | SF_FORMAT_AU | SF_FORMAT_G723_24, 1, 0.15) ;
+-*/
+		test_count++ ;
+		} ;
+	/* Lite remove end */
+
+	if (do_all || strcmp (argv [1], "caf_ulaw") == 0)
+	{	lcomp_test_short	("ulaw.caf", SF_FORMAT_CAF | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_int		("ulaw.caf", SF_FORMAT_CAF | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("ulaw.caf", SF_FORMAT_CAF | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_double	("ulaw.caf", SF_FORMAT_CAF | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove end */
+
+		read_raw_test ("ulaw.caf", SF_FORMAT_CAF | SF_FORMAT_ULAW, 2) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "caf_alaw") == 0)
+	{	lcomp_test_short	("alaw.caf", SF_FORMAT_CAF | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_int		("alaw.caf", SF_FORMAT_CAF | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("alaw.caf", SF_FORMAT_CAF | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_double	("alaw.caf", SF_FORMAT_CAF | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove end */
+
+		read_raw_test ("alaw.caf", SF_FORMAT_CAF | SF_FORMAT_ALAW, 2) ;
+		test_count++ ;
+		} ;
+
+
+	if (do_all || strcmp (argv [1], "raw_ulaw") == 0)
+	{	lcomp_test_short	("ulaw.raw", SF_ENDIAN_LITTLE	| SF_FORMAT_RAW | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_int		("ulaw.raw", SF_ENDIAN_BIG		| SF_FORMAT_RAW | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("ulaw.raw", SF_ENDIAN_LITTLE	| SF_FORMAT_RAW | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_double	("ulaw.raw", SF_ENDIAN_BIG		| SF_FORMAT_RAW | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove end */
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "raw_alaw") == 0)
+	{	lcomp_test_short	("alaw.raw", SF_ENDIAN_LITTLE	| SF_FORMAT_RAW | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_int		("alaw.raw", SF_ENDIAN_BIG		| SF_FORMAT_RAW | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("alaw.raw", SF_ENDIAN_LITTLE	| SF_FORMAT_RAW | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_double	("alaw.raw", SF_ENDIAN_BIG		| SF_FORMAT_RAW | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove end */
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "raw_gsm610") == 0)
+	{	/* Don't do lcomp_test_XXX as the errors are too big. */
+		sdlcomp_test_short	("raw.gsm", SF_FORMAT_RAW | SF_FORMAT_GSM610, 1, 0.24) ;
+		sdlcomp_test_int	("raw.gsm", SF_FORMAT_RAW | SF_FORMAT_GSM610, 1, 0.24) ;
+		sdlcomp_test_float	("raw.gsm", SF_FORMAT_RAW | SF_FORMAT_GSM610, 1, 0.24) ;
+		sdlcomp_test_double	("raw.gsm", SF_FORMAT_RAW | SF_FORMAT_GSM610, 1, 0.24) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "ogg_vorbis") == 0)
+	{	if (HAVE_EXTERNAL_LIBS)
+		{	/* Don't do lcomp_test_XXX as the errors are too big. */
+			sdlcomp_test_short	("vorbis.oga", SF_FORMAT_OGG | SF_FORMAT_VORBIS, 1, 0.30) ;
+			sdlcomp_test_int	("vorbis.oga", SF_FORMAT_OGG | SF_FORMAT_VORBIS, 1, 0.30) ;
+			sdlcomp_test_float	("vorbis.oga", SF_FORMAT_OGG | SF_FORMAT_VORBIS, 1, 0.30) ;
+			sdlcomp_test_double	("vorbis.oga", SF_FORMAT_OGG | SF_FORMAT_VORBIS, 1, 0.30) ;
+			}
+		else
+			puts ("    No Ogg/Vorbis tests because Ogg/Vorbis support was not compiled in.") ;
+
+		test_count++ ;
+		} ;
+
+	/* Lite remove start */
+	if (do_all || strcmp (argv [1], "ircam_ulaw") == 0)
+	{	lcomp_test_short	("ulaw.ircam", SF_ENDIAN_LITTLE | SF_FORMAT_IRCAM | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_int		("ulaw.ircam", SF_ENDIAN_BIG	| SF_FORMAT_IRCAM | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_float	("ulaw.ircam", SF_ENDIAN_LITTLE | SF_FORMAT_IRCAM | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_double	("ulaw.ircam", SF_ENDIAN_BIG	| SF_FORMAT_IRCAM | SF_FORMAT_ULAW, 2, 0.04) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "ircam_alaw") == 0)
+	{	lcomp_test_short	("alaw.ircam", SF_ENDIAN_LITTLE | SF_FORMAT_IRCAM | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_int		("alaw.ircam", SF_ENDIAN_BIG	| SF_FORMAT_IRCAM | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_float	("alaw.ircam", SF_ENDIAN_LITTLE | SF_FORMAT_IRCAM | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_double	("alaw.ircam", SF_ENDIAN_BIG	| SF_FORMAT_IRCAM | SF_FORMAT_ALAW, 2, 0.04) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "nist_ulaw") == 0)
+	{	lcomp_test_short	("ulaw.nist", SF_ENDIAN_LITTLE	| SF_FORMAT_NIST | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_int		("ulaw.nist", SF_ENDIAN_BIG		| SF_FORMAT_NIST | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_float	("ulaw.nist", SF_ENDIAN_LITTLE	| SF_FORMAT_NIST | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_double	("ulaw.nist", SF_ENDIAN_BIG		| SF_FORMAT_NIST | SF_FORMAT_ULAW, 2, 0.04) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "nist_alaw") == 0)
+	{	lcomp_test_short	("alaw.nist", SF_ENDIAN_LITTLE	| SF_FORMAT_NIST | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_int		("alaw.nist", SF_ENDIAN_BIG		| SF_FORMAT_NIST | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_float	("alaw.nist", SF_ENDIAN_LITTLE	| SF_FORMAT_NIST | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_double	("alaw.nist", SF_ENDIAN_BIG		| SF_FORMAT_NIST | SF_FORMAT_ALAW, 2, 0.04) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "voc_ulaw") == 0)
+	{	lcomp_test_short	("ulaw.voc", SF_FORMAT_VOC | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_int		("ulaw.voc", SF_FORMAT_VOC | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_float	("ulaw.voc", SF_FORMAT_VOC | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_double	("ulaw.voc", SF_FORMAT_VOC | SF_FORMAT_ULAW, 2, 0.04) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "voc_alaw") == 0)
+	{	lcomp_test_short	("alaw.voc", SF_FORMAT_VOC | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_int		("alaw.voc", SF_FORMAT_VOC | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_float	("alaw.voc", SF_FORMAT_VOC | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_double	("alaw.voc", SF_FORMAT_VOC | SF_FORMAT_ALAW, 2, 0.04) ;
+		test_count++ ;
+		} ;
+	/* Lite remove end */
+
+	if (do_all || strcmp (argv [1], "w64_ulaw") == 0)
+	{	lcomp_test_short	("ulaw.w64", SF_FORMAT_W64 | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_int		("ulaw.w64", SF_FORMAT_W64 | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("ulaw.w64", SF_FORMAT_W64 | SF_FORMAT_ULAW, 2, 0.04) ;
+		lcomp_test_double	("ulaw.w64", SF_FORMAT_W64 | SF_FORMAT_ULAW, 2, 0.04) ;
+		/* Lite remove end */
+
+		read_raw_test ("ulaw.w64", SF_FORMAT_W64 | SF_FORMAT_ULAW, 2) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "w64_alaw") == 0)
+	{	lcomp_test_short	("alaw.w64", SF_FORMAT_W64 | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_int		("alaw.w64", SF_FORMAT_W64 | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("alaw.w64", SF_FORMAT_W64 | SF_FORMAT_ALAW, 2, 0.04) ;
+		lcomp_test_double	("alaw.w64", SF_FORMAT_W64 | SF_FORMAT_ALAW, 2, 0.04) ;
+		/* Lite remove end */
+
+		read_raw_test ("alaw.w64", SF_FORMAT_W64 | SF_FORMAT_ALAW, 2) ;
+		test_count++ ;
+		} ;
+
+	/* Lite remove start */
+	if (do_all || strcmp (argv [1], "w64_ima") == 0)
+	{	lcomp_test_short	("ima.w64", SF_FORMAT_W64 | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		lcomp_test_int		("ima.w64", SF_FORMAT_W64 | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		lcomp_test_float	("ima.w64", SF_FORMAT_W64 | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		lcomp_test_double	("ima.w64", SF_FORMAT_W64 | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+
+		sdlcomp_test_short	("ima.w64", SF_FORMAT_W64 | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		sdlcomp_test_int	("ima.w64", SF_FORMAT_W64 | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		sdlcomp_test_float	("ima.w64", SF_FORMAT_W64 | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		sdlcomp_test_double	("ima.w64", SF_FORMAT_W64 | SF_FORMAT_IMA_ADPCM, 2, 0.18) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "w64_msadpcm") == 0)
+	{	lcomp_test_short	("msadpcm.w64", SF_FORMAT_W64 | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		lcomp_test_int		("msadpcm.w64", SF_FORMAT_W64 | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		lcomp_test_float	("msadpcm.w64", SF_FORMAT_W64 | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		lcomp_test_double	("msadpcm.w64", SF_FORMAT_W64 | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+
+		sdlcomp_test_short	("msadpcm.w64", SF_FORMAT_W64 | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		sdlcomp_test_int	("msadpcm.w64", SF_FORMAT_W64 | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		sdlcomp_test_float	("msadpcm.w64", SF_FORMAT_W64 | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		sdlcomp_test_double	("msadpcm.w64", SF_FORMAT_W64 | SF_FORMAT_MS_ADPCM, 2, 0.36) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "wve") == 0)
+	{	lcomp_test_short	("psion.wve", SF_FORMAT_WVE | SF_FORMAT_ALAW, 1, 0.04) ;
+		lcomp_test_int		("psion.wve", SF_FORMAT_WVE | SF_FORMAT_ALAW, 1, 0.04) ;
+		/* Lite remove start */
+		lcomp_test_float	("psion.wve", SF_FORMAT_WVE | SF_FORMAT_ALAW, 1, 0.04) ;
+		lcomp_test_double	("psion.wve", SF_FORMAT_WVE | SF_FORMAT_ALAW, 1, 0.04) ;
+		/* Lite remove end */
+		test_count++ ;
+		} ;
+
+	/* Lite remove end */
+
+	if (do_all || strcmp (argv [1], "w64_gsm610") == 0)
+	{	/* Don't do lcomp_test_XXX as the errors are too big. */
+		sdlcomp_test_short	("gsm610.w64", SF_FORMAT_W64 | SF_FORMAT_GSM610, 1, 0.2) ;
+		sdlcomp_test_int	("gsm610.w64", SF_FORMAT_W64 | SF_FORMAT_GSM610, 1, 0.2) ;
+		/* Lite remove start */
+		sdlcomp_test_float	("gsm610.w64", SF_FORMAT_W64 | SF_FORMAT_GSM610, 1, 0.2) ;
+		sdlcomp_test_double	("gsm610.w64", SF_FORMAT_W64 | SF_FORMAT_GSM610, 1, 0.2) ;
+		/* Lite remove end */
+		test_count++ ;
+		} ;
+
+	/* Lite remove start */
+	if (do_all || strcmp (argv [1], "vox_adpcm") == 0)
+	{	lcomp_test_short	("adpcm.vox", SF_FORMAT_RAW | SF_FORMAT_VOX_ADPCM, 1, 0.17) ;
+		lcomp_test_int		("adpcm.vox", SF_FORMAT_RAW | SF_FORMAT_VOX_ADPCM, 1, 0.17) ;
+		lcomp_test_float	("adpcm.vox", SF_FORMAT_RAW | SF_FORMAT_VOX_ADPCM, 1, 0.17) ;
+		lcomp_test_double	("adpcm.vox", SF_FORMAT_RAW | SF_FORMAT_VOX_ADPCM, 1, 0.17) ;
+
+		sdlcomp_test_short	("adpcm.vox", SF_FORMAT_RAW | SF_FORMAT_VOX_ADPCM, 1, 0.072) ;
+		sdlcomp_test_int	("adpcm.vox", SF_FORMAT_RAW | SF_FORMAT_VOX_ADPCM, 1, 0.072) ;
+		sdlcomp_test_float	("adpcm.vox", SF_FORMAT_RAW | SF_FORMAT_VOX_ADPCM, 1, 0.072) ;
+		sdlcomp_test_double	("adpcm.vox", SF_FORMAT_RAW | SF_FORMAT_VOX_ADPCM, 1, 0.072) ;
+		test_count++ ;
+		} ;
+
+	if (do_all || strcmp (argv [1], "xi_dpcm") == 0)
+	{	lcomp_test_short	("8bit.xi", SF_FORMAT_XI | SF_FORMAT_DPCM_8, 1, 0.25) ;
+		lcomp_test_int		("8bit.xi", SF_FORMAT_XI | SF_FORMAT_DPCM_8, 1, 0.25) ;
+
+		lcomp_test_short	("16bit.xi", SF_FORMAT_XI | SF_FORMAT_DPCM_16, 1, 0.002) ;
+		lcomp_test_int		("16bit.xi", SF_FORMAT_XI | SF_FORMAT_DPCM_16, 1, 0.002) ;
+		lcomp_test_float	("16bit.xi", SF_FORMAT_XI | SF_FORMAT_DPCM_16, 1, 0.002) ;
+		lcomp_test_double	("16bit.xi", SF_FORMAT_XI | SF_FORMAT_DPCM_16, 1, 0.002) ;
+		test_count++ ;
+		} ;
+	/* Lite remove end */
+
+	if (test_count == 0)
+	{	printf ("************************************\n") ;
+		printf ("*  No '%s' test defined.\n", argv [1]) ;
+		printf ("************************************\n") ;
+		return 1 ;
+		} ;
+
+	return 0 ;
+} /* main */
+
+/*============================================================================================
+**	Here are the test functions.
+*/
+
+static void
+lcomp_test_short (const char *filename, int filetype, int channels, double margin)
+{	SNDFILE			*file ;
+	SF_INFO			sfinfo ;
+	int				k, m, seekpos, half_max_abs ;
+	long			datalen ;
+	short			*orig, *data ;
+
+	print_test_name ("lcomp_test_short", filename) ;
+
+	datalen = BUFFER_SIZE / channels ;
+
+	data = data_buffer.s ;
+	orig = orig_buffer.s ;
+
+	gen_signal_double (orig_buffer.d, 32000.0, channels, datalen) ;
+	for (k = 0 ; k < channels * datalen ; k++)
+		orig [k] = (short) (orig_buffer.d [k]) ;
+
+	sfinfo.samplerate	= SAMPLE_RATE ;
+	sfinfo.frames		= 123456789 ;	/* Ridiculous value. */
+	sfinfo.channels		= channels ;
+	sfinfo.format		= filetype ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_FALSE, __LINE__) ;
+	test_writef_short_or_die (file, 0, orig, datalen, __LINE__) ;
+	sf_set_string (file, SF_STR_COMMENT, long_comment) ;
+	sf_close (file) ;
+
+	memset (data, 0, datalen * sizeof (short)) ;
+
+	if ((filetype & SF_FORMAT_TYPEMASK) != SF_FORMAT_RAW)
+		memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	if ((sfinfo.format & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)) != (filetype & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)))
+	{	printf ("\n\nLine %d: Returned format incorrect (0x%08X => 0x%08X).\n", __LINE__, filetype, sfinfo.format) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames < datalen / channels)
+	{	printf ("Too few frames in file. (%ld should be a little more than %ld)\n", SF_COUNT_TO_LONG (sfinfo.frames), datalen) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames > (datalen + datalen / 20))
+	{	printf ("Too many frames in file. (%ld should be a little more than %ld)\n", SF_COUNT_TO_LONG (sfinfo.frames), datalen) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.channels != channels)
+	{	printf ("Incorrect number of channels in file.\n") ;
+		exit (1) ;
+		} ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	test_readf_short_or_die (file, 0, data, datalen, __LINE__) ;
+
+	half_max_abs = 0 ;
+	for (k = 0 ; k < datalen ; k++)
+	{	if (error_function (data [k], orig [k], margin))
+		{	printf ("\n\nLine %d: Incorrect sample A (#%d : %d should be %d).\n", __LINE__, k, data [k], orig [k]) ;
+			oct_save_short (orig, data, datalen) ;
+			exit (1) ;
+			} ;
+		half_max_abs = LCT_MAX (half_max_abs, abs (data [k] / 2)) ;
+		} ;
+
+	if (half_max_abs < 1.0)
+	{	printf ("\n\nLine %d: Signal is all zeros.\n", __LINE__) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_readf_short (file, data, datalen)) != sfinfo.frames - datalen)
+	{	printf ("\n\nLine %d: Incorrect read length (%ld should be %d).\n", __LINE__,
+			SF_COUNT_TO_LONG (channels * sfinfo.frames - datalen), k) ;
+		exit (1) ;
+		} ;
+
+	/*	This check is only for block based encoders which must append silence
+	**	to the end of a file so as to fill out a block.
+	*/
+	for (k = 0 ; k < sfinfo.frames - datalen ; k++)
+		if (abs (data [channels * k]) > decay_response (channels * k))
+		{	printf ("\n\nLine %d : Incorrect sample B (#%d : abs (%d) should be < %d).\n", __LINE__, channels * k, data [channels * k], decay_response (channels * k)) ;
+			exit (1) ;
+			} ;
+
+	if (! sfinfo.seekable)
+	{	sf_close (file) ;
+		unlink (filename) ;
+		printf ("ok\n") ;
+		return ;
+		} ;
+
+	/* Now test sf_seek function. */
+
+	if ((k = sf_seek (file, 0, SEEK_SET)) != 0)
+	{	printf ("\n\nLine %d: Seek to start of file failed (%d).\n", __LINE__, k) ;
+		exit (1) ;
+		} ;
+
+	for (m = 0 ; m < 3 ; m++)
+	{	test_readf_short_or_die (file, m, data, 11, __LINE__) ;
+
+		for (k = 0 ; k < channels * 11 ; k++)
+			if (error_function (1.0 * data [k], 1.0 * orig [k + channels * m * 11], margin))
+			{	printf ("\n\nLine %d: Incorrect sample (m = %d) (#%d : %d => %d).\n", __LINE__, m, k + channels * m * 11, orig [k + channels * m * 11], data [k]) ;
+				for (m = 0 ; m < channels ; m++)
+					printf ("%d ", data [m]) ;
+				printf ("\n") ;
+				exit (1) ;
+				} ;
+		} ;
+
+	seekpos = BUFFER_SIZE / 10 ;
+
+	/* Check seek from start of file. */
+	if ((k = sf_seek (file, seekpos, SEEK_SET)) != seekpos)
+	{	printf ("Seek to start of file + %d failed (%d).\n", seekpos, k) ;
+		exit (1) ;
+		} ;
+
+	test_readf_short_or_die (file, 0, data, 1, __LINE__) ;
+
+	if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin))
+	{	printf ("\n\nLine %d: sf_seek (SEEK_SET) followed by sf_readf_short failed (%d, %d).\n", __LINE__, orig [1], data [0]) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_seek (file, 0, SEEK_CUR)) != seekpos + 1)
+	{	printf ("\n\nLine %d: sf_seek (SEEK_CUR) with 0 offset failed (%d should be %d)\n", __LINE__, k, seekpos + 1) ;
+		exit (1) ;
+		} ;
+
+	seekpos = sf_seek (file, 0, SEEK_CUR) + BUFFER_SIZE / 5 ;
+	k = sf_seek (file, BUFFER_SIZE / 5, SEEK_CUR) ;
+	test_readf_short_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin) || k != seekpos)
+	{	printf ("\n\nLine %d: sf_seek (forwards, SEEK_CUR) followed by sf_readf_short failed (%d, %d) (%d, %d).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos + 1) ;
+		oct_save_short (orig, data, datalen) ;
+		exit (1) ;
+		} ;
+
+	seekpos = sf_seek (file, 0, SEEK_CUR) - 20 ;
+	/* Check seek backward from current position. */
+	k = sf_seek (file, -20, SEEK_CUR) ;
+	test_readf_short_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin) || k != seekpos)
+	{	printf ("\nLine %d: sf_seek (backwards, SEEK_CUR) followed by sf_readf_short failed (%d, %d) (%d, %d).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos) ;
+		exit (1) ;
+		} ;
+
+	/* Check that read past end of file returns number of items. */
+	sf_seek (file, sfinfo.frames, SEEK_SET) ;
+
+ 	if ((k = sf_readf_short (file, data, datalen)) != 0)
+ 	{	printf ("\n\nLine %d: Return value from sf_readf_short past end of file incorrect (%d).\n", __LINE__, k) ;
+ 		exit (1) ;
+ 		} ;
+
+	/* Check seek backward from end. */
+	if ((k = sf_seek (file, 5 - sfinfo.frames, SEEK_END)) != 5)
+	{	printf ("\n\nLine %d: sf_seek (SEEK_END) returned %d instead of %d.\n", __LINE__, k, 5) ;
+		exit (1) ;
+		} ;
+
+	test_readf_short_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (1.0 * data [0], 1.0 * orig [5 * channels], margin))
+	{	printf ("\nLine %d: sf_seek (SEEK_END) followed by sf_readf_short failed (%d should be %d).\n", __LINE__, data [0], orig [5 * channels]) ;
+		exit (1) ;
+		} ;
+
+	sf_close (file) ;
+
+	unlink (filename) ;
+	printf ("ok\n") ;
+} /* lcomp_test_short */
+
+/*--------------------------------------------------------------------------------------------
+*/
+
+static void
+lcomp_test_int (const char *filename, int filetype, int channels, double margin)
+{	SNDFILE			*file ;
+	SF_INFO			sfinfo ;
+	int				k, m, half_max_abs ;
+	long			datalen, seekpos ;
+	double			scale, max_val ;
+	int				*orig, *data ;
+
+	print_test_name ("lcomp_test_int", filename) ;
+
+	datalen = BUFFER_SIZE / channels ;
+
+	if (is_lossy (filetype))
+	{	scale = 1.0 * 0x10000 ;
+		max_val = 32000.0 * scale ;
+		}
+	else
+	{	scale = 1.0 ;
+		max_val = 0x7fffffff * scale ;
+		} ;
+
+	data = data_buffer.i ;
+	orig = orig_buffer.i ;
+
+	gen_signal_double (orig_buffer.d, max_val, channels, datalen) ;
+
+	for (k = 0 ; k < channels * datalen ; k++)
+		orig [k] = lrint (orig_buffer.d [k]) ;
+
+	sfinfo.samplerate	= SAMPLE_RATE ;
+	sfinfo.frames		= 123456789 ;	/* Ridiculous value. */
+	sfinfo.channels		= channels ;
+	sfinfo.format		= filetype ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_FALSE, __LINE__) ;
+	test_writef_int_or_die (file, 0, orig, datalen, __LINE__) ;
+	sf_set_string (file, SF_STR_COMMENT, long_comment) ;
+	sf_close (file) ;
+
+	memset (data, 0, datalen * sizeof (int)) ;
+
+	if ((filetype & SF_FORMAT_TYPEMASK) != SF_FORMAT_RAW)
+		memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	if ((sfinfo.format & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)) != (filetype & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)))
+	{	printf ("\n\nLine %d: Returned format incorrect (0x%08X => 0x%08X).\n", __LINE__, filetype, sfinfo.format) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames < datalen / channels)
+	{	printf ("Too few.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames > (datalen + datalen / 20))
+	{	printf ("Too many.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.channels != channels)
+	{	printf ("Incorrect number of channels in file.\n") ;
+		exit (1) ;
+		} ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	test_readf_int_or_die (file, 0, data, datalen, __LINE__) ;
+
+	half_max_abs = 0 ;
+	for (k = 0 ; k < datalen ; k++)
+	{	if (error_function (data [k] / scale, orig [k] / scale, margin))
+		{	printf ("\nLine %d: Incorrect sample (#%d : %f should be %f).\n", __LINE__, k, data [k] / scale, orig [k] / scale) ;
+			oct_save_int (orig, data, datalen) ;
+			exit (1) ;
+			} ;
+		half_max_abs = LCT_MAX (half_max_abs, abs (data [k] / 2)) ;
+		} ;
+
+	if (half_max_abs < 1.0)
+	{	printf ("\n\nLine %d: Signal is all zeros (%d, 0x%X).\n", __LINE__, half_max_abs, half_max_abs) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_readf_int (file, data, datalen)) != sfinfo.frames - datalen)
+	{	printf ("\n\nLine %d: Incorrect read length (%ld should be %d).\n", __LINE__,
+			SF_COUNT_TO_LONG (channels * sfinfo.frames - datalen), k) ;
+		exit (1) ;
+		} ;
+
+	/*	This check is only for block based encoders which must append silence
+	**	to the end of a file so as to fill out a block.
+	*/
+	if ((sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_MS_ADPCM)
+		for (k = 0 ; k < sfinfo.frames - datalen ; k++)
+			if (abs (data [channels * k] / scale) > decay_response (channels * k))
+			{	printf ("\n\nLine %d : Incorrect sample B (#%d : abs (%d) should be < %d).\n", __LINE__, channels * k, data [channels * k], decay_response (channels * k)) ;
+				exit (1) ;
+				} ;
+
+	if (! sfinfo.seekable)
+	{	sf_close (file) ;
+		unlink (filename) ;
+		printf ("ok\n") ;
+		return ;
+		} ;
+
+	/* Now test sf_seek function. */
+
+	if ((k = sf_seek (file, 0, SEEK_SET)) != 0)
+	{	printf ("\n\nLine %d: Seek to start of file failed (%d).\n", __LINE__, k) ;
+		exit (1) ;
+		} ;
+
+	for (m = 0 ; m < 3 ; m++)
+	{	test_readf_int_or_die (file, m, data, 11, __LINE__) ;
+
+		for (k = 0 ; k < channels * 11 ; k++)
+			if (error_function (data [k] / scale, orig [k + channels * m * 11] / scale, margin))
+			{	printf ("\nLine %d: Incorrect sample (m = %d) (#%d : %d => %d).\n", __LINE__, m, k + channels * m * 11, orig [k + channels * m * 11], data [k]) ;
+				for (m = 0 ; m < channels ; m++)
+					printf ("%d ", data [m]) ;
+				printf ("\n") ;
+				exit (1) ;
+				} ;
+		} ;
+
+	seekpos = BUFFER_SIZE / 10 ;
+
+	/* Check seek from start of file. */
+	if ((k = sf_seek (file, seekpos, SEEK_SET)) != seekpos)
+	{	printf ("Seek to start of file + %ld failed (%d).\n", seekpos, k) ;
+		exit (1) ;
+		} ;
+
+	test_readf_int_or_die (file, 0, data, 1, __LINE__) ;
+
+	if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin))
+	{	printf ("\nLine %d: sf_seek (SEEK_SET) followed by sf_readf_int failed (%d, %d).\n", __LINE__, orig [1], data [0]) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_seek (file, 0, SEEK_CUR)) != seekpos + 1)
+	{	printf ("\n\nLine %d: sf_seek (SEEK_CUR) with 0 offset failed (%d should be %ld)\n", __LINE__, k, seekpos + 1) ;
+		exit (1) ;
+		} ;
+
+	seekpos = sf_seek (file, 0, SEEK_CUR) + BUFFER_SIZE / 5 ;
+	k = sf_seek (file, BUFFER_SIZE / 5, SEEK_CUR) ;
+	test_readf_int_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin) || k != seekpos)
+	{	printf ("\nLine %d: sf_seek (forwards, SEEK_CUR) followed by sf_readf_int failed (%d, %d) (%d, %ld).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos + 1) ;
+		exit (1) ;
+		} ;
+
+	seekpos = sf_seek (file, 0, SEEK_CUR) - 20 ;
+	/* Check seek backward from current position. */
+	k = sf_seek (file, -20, SEEK_CUR) ;
+	test_readf_int_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin) || k != seekpos)
+	{	printf ("\nLine %d: sf_seek (backwards, SEEK_CUR) followed by sf_readf_int failed (%d, %d) (%d, %ld).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos) ;
+		exit (1) ;
+		} ;
+
+	/* Check that read past end of file returns number of items. */
+	sf_seek (file, sfinfo.frames, SEEK_SET) ;
+
+ 	if ((k = sf_readf_int (file, data, datalen)) != 0)
+ 	{	printf ("\n\nLine %d: Return value from sf_readf_int past end of file incorrect (%d).\n", __LINE__, k) ;
+ 		exit (1) ;
+ 		} ;
+
+	/* Check seek backward from end. */
+	if ((k = sf_seek (file, 5 - sfinfo.frames, SEEK_END)) != 5)
+	{	printf ("\n\nLine %d: sf_seek (SEEK_END) returned %d instead of %d.\n", __LINE__, k, 5) ;
+		exit (1) ;
+		} ;
+
+	test_readf_int_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (data [0] / scale, orig [5 * channels] / scale, margin))
+	{	printf ("\nLine %d: sf_seek (SEEK_END) followed by sf_readf_short failed (%d should be %d).\n", __LINE__, data [0], orig [5]) ;
+		exit (1) ;
+		} ;
+
+	sf_close (file) ;
+
+	unlink (filename) ;
+	printf ("ok\n") ;
+} /* lcomp_test_int */
+
+/*--------------------------------------------------------------------------------------------
+*/
+
+static void
+lcomp_test_float (const char *filename, int filetype, int channels, double margin)
+{	SNDFILE			*file ;
+	SF_INFO			sfinfo ;
+	int				k, m, seekpos ;
+	long			datalen ;
+	float			*orig, *data ;
+	double			half_max_abs ;
+
+	print_test_name ("lcomp_test_float", filename) ;
+
+	datalen = BUFFER_SIZE / channels ;
+
+	data = data_buffer.f ;
+	orig = orig_buffer.f ;
+
+	gen_signal_double (orig_buffer.d, 32000.0, channels, datalen) ;
+	for (k = 0 ; k < channels * datalen ; k++)
+		orig [k] = orig_buffer.d [k] ;
+
+	sfinfo.samplerate	= SAMPLE_RATE ;
+	sfinfo.frames		= 123456789 ;	/* Ridiculous value. */
+	sfinfo.channels		= channels ;
+	sfinfo.format		= filetype ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_FALSE, __LINE__) ;
+	sf_command (file, SFC_SET_NORM_FLOAT, NULL, SF_FALSE) ;
+	test_writef_float_or_die (file, 0, orig, datalen, __LINE__) ;
+	sf_set_string (file, SF_STR_COMMENT, long_comment) ;
+	sf_close (file) ;
+
+	memset (data, 0, datalen * sizeof (float)) ;
+
+	if ((filetype & SF_FORMAT_TYPEMASK) != SF_FORMAT_RAW)
+		memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	if ((sfinfo.format & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)) != (filetype & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)))
+	{	printf ("\n\nLine %d: Returned format incorrect (0x%08X => 0x%08X).\n", __LINE__, filetype, sfinfo.format) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames < datalen / channels)
+	{	printf ("Too few.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames > (datalen + datalen / 20))
+	{	printf ("Too many.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.channels != channels)
+	{	printf ("Incorrect number of channels in file.\n") ;
+		exit (1) ;
+		} ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	sf_command (file, SFC_SET_NORM_FLOAT, NULL, SF_FALSE) ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	sf_command (file, SFC_SET_NORM_FLOAT, NULL, SF_FALSE) ;
+
+	test_readf_float_or_die (file, 0, data, datalen, __LINE__) ;
+
+	half_max_abs = 0.0 ;
+	for (k = 0 ; k < datalen ; k++)
+	{	if (error_function (data [k], orig [k], margin))
+		{	printf ("\nLine %d: Incorrect sample A (#%d : %f should be %f).\n", __LINE__, k, data [k], orig [k]) ;
+			oct_save_float (orig, data, datalen) ;
+			exit (1) ;
+			} ;
+		half_max_abs = LCT_MAX (half_max_abs, fabs (0.5 * data [k])) ;
+		} ;
+
+	if (half_max_abs < 1.0)
+	{	printf ("\n\nLine %d: Signal is all zeros.\n", __LINE__) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_readf_float (file, data, datalen)) != sfinfo.frames - datalen)
+	{	printf ("\n\nLine %d: Incorrect read length (%ld should be %d).\n", __LINE__,
+			SF_COUNT_TO_LONG (channels * sfinfo.frames - datalen), k) ;
+		exit (1) ;
+		} ;
+
+	/*	This check is only for block based encoders which must append silence
+	**	to the end of a file so as to fill out a block.
+	*/
+	if ((sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_MS_ADPCM)
+		for (k = 0 ; k < sfinfo.frames - datalen ; k++)
+			if (abs (data [channels * k]) > decay_response (channels * k))
+			{	printf ("\n\nLine %d : Incorrect sample B (#%d : abs (%f) should be < %d).\n", __LINE__, channels * k, data [channels * k], decay_response (channels * k)) ;
+				exit (1) ;
+				} ;
+
+	if (! sfinfo.seekable)
+	{	sf_close (file) ;
+		unlink (filename) ;
+		printf ("ok\n") ;
+		return ;
+		} ;
+
+	/* Now test sf_seek function. */
+
+	if ((k = sf_seek (file, 0, SEEK_SET)) != 0)
+	{	printf ("\n\nLine %d: Seek to start of file failed (%d).\n", __LINE__, k) ;
+		exit (1) ;
+		} ;
+
+	for (m = 0 ; m < 3 ; m++)
+	{	test_readf_float_or_die (file, 0, data, 11, __LINE__) ;
+
+		for (k = 0 ; k < channels * 11 ; k++)
+			if (error_function (data [k], orig [k + channels * m * 11], margin))
+			{	printf ("\nLine %d: Incorrect sample (m = %d) (#%d : %f => %f).\n", __LINE__, m, k + channels * m * 11, orig [k + channels * m * 11], data [k]) ;
+				for (m = 0 ; m < channels ; m++)
+					printf ("%f ", data [m]) ;
+				printf ("\n") ;
+				exit (1) ;
+				} ;
+		} ;
+
+	seekpos = BUFFER_SIZE / 10 ;
+
+	/* Check seek from start of file. */
+	if ((k = sf_seek (file, seekpos, SEEK_SET)) != seekpos)
+	{	printf ("Seek to start of file + %d failed (%d).\n", seekpos, k) ;
+		exit (1) ;
+		} ;
+
+	test_readf_float_or_die (file, 0, data, 1, __LINE__) ;
+
+	if (error_function (data [0], orig [seekpos * channels], margin))
+	{	printf ("\nLine %d: sf_seek (SEEK_SET) followed by sf_readf_float failed (%f, %f).\n", __LINE__, orig [1], data [0]) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_seek (file, 0, SEEK_CUR)) != seekpos + 1)
+	{	printf ("\n\nLine %d: sf_seek (SEEK_CUR) with 0 offset failed (%d should be %d)\n", __LINE__, k, seekpos + 1) ;
+		exit (1) ;
+		} ;
+
+	seekpos = sf_seek (file, 0, SEEK_CUR) + BUFFER_SIZE / 5 ;
+	k = sf_seek (file, BUFFER_SIZE / 5, SEEK_CUR) ;
+	test_readf_float_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (data [0], orig [seekpos * channels], margin) || k != seekpos)
+	{	printf ("\nLine %d: sf_seek (forwards, SEEK_CUR) followed by sf_readf_float failed (%f, %f) (%d, %d).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos + 1) ;
+		exit (1) ;
+		} ;
+
+	seekpos = sf_seek (file, 0, SEEK_CUR) - 20 ;
+	/* Check seek backward from current position. */
+	k = sf_seek (file, -20, SEEK_CUR) ;
+	test_readf_float_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (data [0], orig [seekpos * channels], margin) || k != seekpos)
+	{	printf ("\nLine %d: sf_seek (backwards, SEEK_CUR) followed by sf_readf_float failed (%f, %f) (%d, %d).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos) ;
+		exit (1) ;
+		} ;
+
+	/* Check that read past end of file returns number of items. */
+	sf_seek (file, sfinfo.frames, SEEK_SET) ;
+
+ 	if ((k = sf_readf_float (file, data, datalen)) != 0)
+ 	{	printf ("\n\nLine %d: Return value from sf_readf_float past end of file incorrect (%d).\n", __LINE__, k) ;
+ 		exit (1) ;
+ 		} ;
+
+	/* Check seek backward from end. */
+	if ((k = sf_seek (file, 5 - sfinfo.frames, SEEK_END)) != 5)
+	{	printf ("\n\nLine %d: sf_seek (SEEK_END) returned %d instead of %d.\n", __LINE__, k, 5) ;
+		exit (1) ;
+		} ;
+
+	test_readf_float_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (data [0], orig [5 * channels], margin))
+	{	printf ("\nLine %d: sf_seek (SEEK_END) followed by sf_readf_short failed (%f should be %f).\n", __LINE__, data [0], orig [5 * channels]) ;
+		exit (1) ;
+		} ;
+
+	sf_close (file) ;
+
+	unlink (filename) ;
+	printf ("ok\n") ;
+} /* lcomp_test_float */
+
+/*--------------------------------------------------------------------------------------------
+*/
+
+static void
+lcomp_test_double (const char *filename, int filetype, int channels, double margin)
+{	SNDFILE			*file ;
+	SF_INFO			sfinfo ;
+	int				k, m, seekpos ;
+	long			datalen ;
+	double			*orig, *data ;
+	double			half_max_abs ;
+
+	print_test_name ("lcomp_test_double", filename) ;
+
+	datalen = BUFFER_SIZE / channels ;
+
+	data = data_buffer.d ;
+	orig = orig_buffer.d ;
+
+	gen_signal_double (orig_buffer.d, 32000.0, channels, datalen) ;
+	for (k = 0 ; k < channels * datalen ; k++)
+		orig [k] = orig_buffer.d [k] ;
+
+	sfinfo.samplerate	= SAMPLE_RATE ;
+	sfinfo.frames		= 123456789 ;	/* Ridiculous value. */
+	sfinfo.channels		= channels ;
+	sfinfo.format		= filetype ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_FALSE, __LINE__) ;
+	sf_command (file, SFC_SET_NORM_DOUBLE, NULL, SF_FALSE) ;
+	test_writef_double_or_die (file, 0, orig, datalen, __LINE__) ;
+	sf_set_string (file, SF_STR_COMMENT, long_comment) ;
+	sf_close (file) ;
+
+	memset (data, 0, datalen * sizeof (double)) ;
+
+	if ((filetype & SF_FORMAT_TYPEMASK) != SF_FORMAT_RAW)
+		memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	if ((sfinfo.format & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)) != (filetype & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)))
+	{	printf ("\n\nLine %d: Returned format incorrect (0x%08X => 0x%08X).\n", __LINE__, filetype, sfinfo.format) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames < datalen / channels)
+	{	printf ("Too few.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames > (datalen + datalen / 20))
+	{	printf ("Too many.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.channels != channels)
+	{	printf ("Incorrect number of channels in file.\n") ;
+		exit (1) ;
+		} ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	sf_command (file, SFC_SET_NORM_DOUBLE, NULL, SF_FALSE) ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	sf_command (file, SFC_SET_NORM_DOUBLE, NULL, SF_FALSE) ;
+
+	test_readf_double_or_die (file, 0, data, datalen, __LINE__) ;
+
+	half_max_abs = 0.0 ;
+	for (k = 0 ; k < datalen ; k++)
+	{	if (error_function (data [k], orig [k], margin))
+		{	printf ("\nLine %d: Incorrect sample A (#%d : %f should be %f).\n", __LINE__, k, data [k], orig [k]) ;
+			oct_save_double (orig, data, datalen) ;
+			exit (1) ;
+			} ;
+		half_max_abs = LCT_MAX (half_max_abs, abs (0.5 * data [k])) ;
+		} ;
+
+	if (half_max_abs < 1.0)
+	{	printf ("\n\nLine %d: Signal is all zeros.\n", __LINE__) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_readf_double (file, data, datalen)) != sfinfo.frames - datalen)
+	{	printf ("\n\nLine %d: Incorrect read length (%ld should be %d).\n", __LINE__,
+			SF_COUNT_TO_LONG (channels * sfinfo.frames - datalen), k) ;
+		exit (1) ;
+		} ;
+
+	/*	This check is only for block based encoders which must append silence
+	**	to the end of a file so as to fill out a block.
+	*/
+	if ((sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_MS_ADPCM)
+		for (k = 0 ; k < sfinfo.frames - datalen ; k++)
+			if (abs (data [channels * k]) > decay_response (channels * k))
+			{	printf ("\n\nLine %d : Incorrect sample B (#%d : abs (%f) should be < %d).\n", __LINE__, channels * k, data [channels * k], decay_response (channels * k)) ;
+				exit (1) ;
+				} ;
+
+	if (! sfinfo.seekable)
+	{	sf_close (file) ;
+		unlink (filename) ;
+		printf ("ok\n") ;
+		return ;
+		} ;
+
+	/* Now test sf_seek function. */
+
+	if ((k = sf_seek (file, 0, SEEK_SET)) != 0)
+	{	printf ("\n\nLine %d: Seek to start of file failed (%d).\n", __LINE__, k) ;
+		exit (1) ;
+		} ;
+
+	for (m = 0 ; m < 3 ; m++)
+	{	test_readf_double_or_die (file, m, data, 11, __LINE__) ;
+
+		for (k = 0 ; k < channels * 11 ; k++)
+			if (error_function (data [k], orig [k + channels * m * 11], margin))
+			{	printf ("\nLine %d: Incorrect sample (m = %d) (#%d : %f => %f).\n", __LINE__, m, k + channels * m * 11, orig [k + channels * m * 11], data [k]) ;
+				for (m = 0 ; m < channels ; m++)
+					printf ("%f ", data [m]) ;
+				printf ("\n") ;
+				exit (1) ;
+				} ;
+		} ;
+
+	seekpos = BUFFER_SIZE / 10 ;
+
+	/* Check seek from start of file. */
+	if ((k = sf_seek (file, seekpos, SEEK_SET)) != seekpos)
+	{	printf ("Seek to start of file + %d failed (%d).\n", seekpos, k) ;
+		exit (1) ;
+		} ;
+
+	test_readf_double_or_die (file, 0, data, 1, __LINE__) ;
+
+	if (error_function (data [0], orig [seekpos * channels], margin))
+	{	printf ("\nLine %d: sf_seek (SEEK_SET) followed by sf_readf_double failed (%f, %f).\n", __LINE__, orig [1], data [0]) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_seek (file, 0, SEEK_CUR)) != seekpos + 1)
+	{	printf ("\n\nLine %d: sf_seek (SEEK_CUR) with 0 offset failed (%d should be %d)\n", __LINE__, k, seekpos + 1) ;
+		exit (1) ;
+		} ;
+
+	seekpos = sf_seek (file, 0, SEEK_CUR) + BUFFER_SIZE / 5 ;
+	k = sf_seek (file, BUFFER_SIZE / 5, SEEK_CUR) ;
+	test_readf_double_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (data [0], orig [seekpos * channels], margin) || k != seekpos)
+	{	printf ("\nLine %d: sf_seek (forwards, SEEK_CUR) followed by sf_readf_double failed (%f, %f) (%d, %d).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos + 1) ;
+		exit (1) ;
+		} ;
+
+	seekpos = sf_seek (file, 0, SEEK_CUR) - 20 ;
+	/* Check seek backward from current position. */
+	k = sf_seek (file, -20, SEEK_CUR) ;
+	test_readf_double_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (data [0], orig [seekpos * channels], margin) || k != seekpos)
+	{	printf ("\nLine %d: sf_seek (backwards, SEEK_CUR) followed by sf_readf_double failed (%f, %f) (%d, %d).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos) ;
+		exit (1) ;
+		} ;
+
+	/* Check that read past end of file returns number of items. */
+	sf_seek (file, sfinfo.frames, SEEK_SET) ;
+
+ 	if ((k = sf_readf_double (file, data, datalen)) != 0)
+ 	{	printf ("\n\nLine %d: Return value from sf_readf_double past end of file incorrect (%d).\n", __LINE__, k) ;
+ 		exit (1) ;
+ 		} ;
+
+	/* Check seek backward from end. */
+	if ((k = sf_seek (file, 5 - sfinfo.frames, SEEK_END)) != 5)
+	{	printf ("\n\nLine %d: sf_seek (SEEK_END) returned %d instead of %d.\n", __LINE__, k, 5) ;
+		exit (1) ;
+		} ;
+
+	test_readf_double_or_die (file, 0, data, 1, __LINE__) ;
+	if (error_function (data [0], orig [5 * channels], margin))
+	{	printf ("\nLine %d: sf_seek (SEEK_END) followed by sf_readf_short failed (%f should be %f).\n", __LINE__, data [0], orig [5 * channels]) ;
+		exit (1) ;
+		} ;
+
+	sf_close (file) ;
+
+	unlink (filename) ;
+	printf ("ok\n") ;
+} /* lcomp_test_double */
+
+/*========================================================================================
+**	Smoothed differential loss compression tests.
+*/
+
+static void
+sdlcomp_test_short	(const char *filename, int filetype, int channels, double margin)
+{	SNDFILE			*file ;
+	SF_INFO			sfinfo ;
+	int				k, m, seekpos, half_max_abs ;
+	long			datalen ;
+	short			*orig, *data, *smooth ;
+
+channels = 1 ;
+	print_test_name ("sdlcomp_test_short", filename) ;
+
+	datalen = BUFFER_SIZE ;
+
+	orig = orig_buffer.s ;
+	data = data_buffer.s ;
+	smooth = smooth_buffer.s ;
+
+	gen_signal_double (orig_buffer.d, 32000.0, channels, datalen) ;
+	for (k = 0 ; k < datalen ; k++)
+		orig [k] = lrint (orig_buffer.d [k]) ;
+
+	sfinfo.samplerate	= SAMPLE_RATE ;
+	sfinfo.frames		= 123456789 ;	/* Ridiculous value. */
+	sfinfo.channels		= channels ;
+	sfinfo.format		= filetype ;
+
+	/*	The Vorbis encoder has a bug on PowerPC and X86-64 with sample rates
+	**	<= 22050. Increasing the sample rate to 32000 avoids triggering it.
+	**	See https://trac.xiph.org/ticket/1229
+	*/
+	if ((file = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL)
+	{	const char * errstr ;
+
+		errstr = sf_strerror (NULL) ;
+		if (strstr (errstr, "Sample rate chosen is known to trigger a Vorbis") == NULL)
+		{	printf ("Line %d: sf_open_fd (SFM_WRITE) failed : %s\n", __LINE__, errstr) ;
+			dump_log_buffer (NULL) ;
+			exit (1) ;
+			} ;
+
+		printf ("\n                                  Sample rate -> 32kHz    ") ;
+		sfinfo.samplerate = 32000 ;
+
+		file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_TRUE, __LINE__) ;
+		} ;
+
+	test_write_short_or_die (file, 0, orig, datalen, __LINE__) ;
+	sf_set_string (file, SF_STR_COMMENT, long_comment) ;
+	sf_close (file) ;
+
+	memset (data, 0, datalen * sizeof (short)) ;
+
+	if ((filetype & SF_FORMAT_TYPEMASK) != SF_FORMAT_RAW)
+		memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	if (sfinfo.format != filetype)
+	{	printf ("\n\nLine %d: Returned format incorrect (0x%08X => 0x%08X).\n", __LINE__, filetype, sfinfo.format) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames < datalen / channels)
+	{	printf ("Too few.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames > (datalen + 400))
+	{	printf ("Too many.frames in file. (%ld should be a little more than %ld)\n", SF_COUNT_TO_LONG (sfinfo.frames), datalen) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.channels != channels)
+	{	printf ("Incorrect number of channels in file.\n") ;
+		exit (1) ;
+		} ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	sf_command (file, SFC_SET_NORM_FLOAT, NULL, SF_FALSE) ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	test_readf_short_or_die (file, 0, data, datalen, __LINE__) ;
+
+	memcpy (smooth, orig, datalen * sizeof (short)) ;
+	smoothed_diff_short (data, datalen) ;
+	smoothed_diff_short (smooth, datalen) ;
+
+	half_max_abs = 0.0 ;
+	for (k = 0 ; k < datalen ; k++)
+	{	if (error_function (1.0 * data [k], 1.0 * smooth [k], margin))
+		{	printf ("\nLine %d: Incorrect sample (#%d : %d should be %d).\n", __LINE__, k, data [k], smooth [k]) ;
+			oct_save_short (orig, smooth, datalen) ;
+			exit (1) ;
+			} ;
+		half_max_abs = LCT_MAX (half_max_abs, abs (0.5 * data [k])) ;
+		} ;
+
+	if (half_max_abs < 1)
+	{	printf ("\n\nLine %d: Signal is all zeros.\n", __LINE__) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_read_short (file, data, datalen)) != sfinfo.frames - datalen)
+	{	printf ("\n\nLine %d: Incorrect read length (%d should be %ld).\n", __LINE__, k, SF_COUNT_TO_LONG (sfinfo.frames - datalen)) ;
+		exit (1) ;
+		} ;
+
+	if ((sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_MS_ADPCM &&
+		(sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_GSM610)
+		for (k = 0 ; k < sfinfo.frames - datalen ; k++)
+			if (abs (data [k]) > decay_response (k))
+			{	printf ("\n\nLine %d: Incorrect sample (#%ld : abs (%d) should be < %d).\n", __LINE__, datalen + k, data [k], decay_response (k)) ;
+				exit (1) ;
+				} ;
+
+	/* Now test sf_seek function. */
+	if (sfinfo.seekable)
+	{	if ((k = sf_seek (file, 0, SEEK_SET)) != 0)
+		{	printf ("\n\nLine %d: Seek to start of file failed (%d).\n", __LINE__, k) ;
+			exit (1) ;
+			} ;
+
+		for (m = 0 ; m < 3 ; m++)
+		{	test_readf_short_or_die (file, m, data, datalen / 7, __LINE__) ;
+
+			smoothed_diff_short (data, datalen / 7) ;
+			memcpy (smooth, orig + m * datalen / 7, datalen / 7 * sizeof (short)) ;
+			smoothed_diff_short (smooth, datalen / 7) ;
+
+			for (k = 0 ; k < datalen / 7 ; k++)
+				if (error_function (1.0 * data [k], 1.0 * smooth [k], margin))
+				{	printf ("\nLine %d: Incorrect sample C (#%d (%ld) : %d => %d).\n", __LINE__, k, k + m * (datalen / 7), smooth [k], data [k]) ;
+					for (m = 0 ; m < 10 ; m++)
+						printf ("%d ", data [k]) ;
+					printf ("\n") ;
+					exit (1) ;
+					} ;
+			} ; /* for (m = 0 ; m < 3 ; m++) */
+
+		seekpos = BUFFER_SIZE / 10 ;
+
+		/* Check seek from start of file. */
+		if ((k = sf_seek (file, seekpos, SEEK_SET)) != seekpos)
+		{	printf ("Seek to start of file + %d failed (%d).\n", seekpos, k) ;
+			exit (1) ;
+			} ;
+		test_readf_short_or_die (file, 0, data, 1, __LINE__) ;
+
+		if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin))
+		{	printf ("\nLine %d: sf_seek (SEEK_SET) followed by sf_read_short failed (%d, %d).\n", __LINE__, orig [1], data [0]) ;
+			exit (1) ;
+			} ;
+
+		if ((k = sf_seek (file, 0, SEEK_CUR)) != seekpos + 1)
+		{	printf ("\n\nLine %d: sf_seek (SEEK_CUR) with 0 offset failed (%d should be %d)\n", __LINE__, k, seekpos + 1) ;
+			exit (1) ;
+			} ;
+
+		seekpos = sf_seek (file, 0, SEEK_CUR) + BUFFER_SIZE / 5 ;
+		k = sf_seek (file, BUFFER_SIZE / 5, SEEK_CUR) ;
+		test_readf_short_or_die (file, 0, data, 1, __LINE__) ;
+		if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin) || k != seekpos)
+		{	printf ("\nLine %d: sf_seek (forwards, SEEK_CUR) followed by sf_read_short failed (%d, %d) (%d, %d).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos + 1) ;
+			exit (1) ;
+			} ;
+
+		seekpos = sf_seek (file, 0, SEEK_CUR) - 20 ;
+		/* Check seek backward from current position. */
+		k = sf_seek (file, -20, SEEK_CUR) ;
+		test_readf_short_or_die (file, 0, data, 1, __LINE__) ;
+		if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin) || k != seekpos)
+		{	printf ("\nLine %d: sf_seek (backwards, SEEK_CUR) followed by sf_read_short failed (%d, %d) (%d, %d).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos) ;
+			exit (1) ;
+			} ;
+
+		/* Check that read past end of file returns number of items. */
+		sf_seek (file, sfinfo.frames, SEEK_SET) ;
+
+	 	if ((k = sf_read_short (file, data, datalen)) != 0)
+	 	{	printf ("\n\nLine %d: Return value from sf_read_short past end of file incorrect (%d).\n", __LINE__, k) ;
+	 		exit (1) ;
+	 		} ;
+
+		/* Check seek backward from end. */
+
+		if ((k = sf_seek (file, 5 - sfinfo.frames, SEEK_END)) != 5)
+		{	printf ("\n\nLine %d: sf_seek (SEEK_END) returned %d instead of %d.\n", __LINE__, k, 5) ;
+			exit (1) ;
+			} ;
+
+		test_read_short_or_die (file, 0, data, channels, __LINE__) ;
+		if (error_function (1.0 * data [0], 1.0 * orig [5 * channels], margin))
+		{	printf ("\nLine %d: sf_seek (SEEK_END) followed by sf_read_short failed (%d should be %d).\n", __LINE__, data [0], orig [5 * channels]) ;
+			exit (1) ;
+			} ;
+		} /* if (sfinfo.seekable) */
+
+	sf_close (file) ;
+
+	unlink (filename) ;
+	printf ("ok\n") ;
+} /* sdlcomp_test_short */
+
+static	void
+sdlcomp_test_int	(const char *filename, int filetype, int channels, double margin)
+{	SNDFILE			*file ;
+	SF_INFO			sfinfo ;
+	int				k, m, seekpos, half_max_abs ;
+	long			datalen ;
+	int				*orig, *data, *smooth ;
+	double			scale ;
+
+channels = 1 ;
+
+	print_test_name ("sdlcomp_test_int", filename) ;
+
+	datalen = BUFFER_SIZE ;
+	scale = 1.0 * 0x10000 ;
+
+	orig = orig_buffer.i ;
+	data = data_buffer.i ;
+	smooth = smooth_buffer.i ;
+
+	gen_signal_double (orig_buffer.d, 32000.0 * scale, channels, datalen) ;
+	for (k = 0 ; k < datalen ; k++)
+		orig [k] = lrint (orig_buffer.d [k]) ;
+
+	sfinfo.samplerate	= SAMPLE_RATE ;
+	sfinfo.frames		= 123456789 ;	/* Ridiculous value. */
+	sfinfo.channels		= channels ;
+	sfinfo.format		= filetype ;
+
+	/*	The Vorbis encoder has a bug on PowerPC and X86-64 with sample rates
+	**	<= 22050. Increasing the sample rate to 32000 avoids triggering it.
+	**	See https://trac.xiph.org/ticket/1229
+	*/
+	if ((file = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL)
+	{	const char * errstr ;
+
+		errstr = sf_strerror (NULL) ;
+		if (strstr (errstr, "Sample rate chosen is known to trigger a Vorbis") == NULL)
+		{	printf ("Line %d: sf_open_fd (SFM_WRITE) failed : %s\n", __LINE__, errstr) ;
+			dump_log_buffer (NULL) ;
+			exit (1) ;
+			} ;
+
+		printf ("\n                                  Sample rate -> 32kHz    ") ;
+		sfinfo.samplerate = 32000 ;
+
+		file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_TRUE, __LINE__) ;
+		} ;
+
+	test_writef_int_or_die (file, 0, orig, datalen, __LINE__) ;
+	sf_set_string (file, SF_STR_COMMENT, long_comment) ;
+	sf_close (file) ;
+
+	memset (data, 0, datalen * sizeof (int)) ;
+
+	if ((filetype & SF_FORMAT_TYPEMASK) != SF_FORMAT_RAW)
+		memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	if (sfinfo.format != filetype)
+	{	printf ("Returned format incorrect (0x%08X => 0x%08X).\n", filetype, sfinfo.format) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames < datalen / channels)
+	{	printf ("Too few.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames > (datalen + 400))
+	{	printf ("Too many.frames in file. (%ld should be a little more than %ld)\n", SF_COUNT_TO_LONG (sfinfo.frames), datalen) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.channels != channels)
+	{	printf ("Incorrect number of channels in file.\n") ;
+		exit (1) ;
+		} ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	test_readf_int_or_die (file, 0, data, datalen, __LINE__) ;
+
+	memcpy (smooth, orig, datalen * sizeof (int)) ;
+	smoothed_diff_int (data, datalen) ;
+	smoothed_diff_int (smooth, datalen) ;
+
+	half_max_abs = abs (data [0] >> 16) ;
+	for (k = 1 ; k < datalen ; k++)
+	{	if (error_function (data [k] / scale, smooth [k] / scale, margin))
+		{	printf ("\nLine %d: Incorrect sample (#%d : %d should be %d).\n", __LINE__, k, data [k], smooth [k]) ;
+			oct_save_int (orig, smooth, datalen) ;
+			exit (1) ;
+			} ;
+		half_max_abs = LCT_MAX (half_max_abs, abs (data [k] / 2)) ;
+		} ;
+
+	if (half_max_abs < 1)
+	{	printf ("\n\nLine %d: Signal is all zeros.\n", __LINE__) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_readf_int (file, data, datalen)) != sfinfo.frames - datalen)
+	{	printf ("\n\nLine %d: Incorrect read length (%d should be %ld).\n", __LINE__, k, SF_COUNT_TO_LONG (sfinfo.frames - datalen)) ;
+		exit (1) ;
+		} ;
+
+	if ((sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_IMA_ADPCM &&
+		(sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_MS_ADPCM &&
+		(sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_GSM610 &&
+		(sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_G721_32 &&
+		(sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_G723_24)
+		for (k = 0 ; k < sfinfo.frames - datalen ; k++)
+			if (abs (data [k]) > decay_response (k))
+			{	printf ("\n\nLine %d: Incorrect sample (#%ld : abs (%d) should be < %d).\n", __LINE__, datalen + k, data [k], decay_response (k)) ;
+				exit (1) ;
+				} ;
+
+	/* Now test sf_seek function. */
+	if (sfinfo.seekable)
+	{	if ((k = sf_seek (file, 0, SEEK_SET)) != 0)
+		{	printf ("\n\nLine %d: Seek to start of file failed (%d).\n", __LINE__, k) ;
+			exit (1) ;
+			} ;
+
+		for (m = 0 ; m < 3 ; m++)
+		{	test_readf_int_or_die (file, m, data, datalen / 7, __LINE__) ;
+
+			smoothed_diff_int (data, datalen / 7) ;
+			memcpy (smooth, orig + m * datalen / 7, datalen / 7 * sizeof (int)) ;
+			smoothed_diff_int (smooth, datalen / 7) ;
+
+			for (k = 0 ; k < datalen / 7 ; k++)
+				if (error_function (data [k] / scale, smooth [k] / scale, margin))
+				{	printf ("\nLine %d: Incorrect sample (#%d (%ld) : %d => %d).\n", __LINE__, k, k + m * (datalen / 7), smooth [k], data [k]) ;
+					for (m = 0 ; m < 10 ; m++)
+						printf ("%d ", data [k]) ;
+					printf ("\n") ;
+					exit (1) ;
+					} ;
+			} ; /* for (m = 0 ; m < 3 ; m++) */
+
+		seekpos = BUFFER_SIZE / 10 ;
+
+		/* Check seek from start of file. */
+		if ((k = sf_seek (file, seekpos, SEEK_SET)) != seekpos)
+		{	printf ("Seek to start of file + %d failed (%d).\n", seekpos, k) ;
+			exit (1) ;
+			} ;
+		test_readf_int_or_die (file, 0, data, 1, __LINE__) ;
+
+		if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin))
+		{	printf ("\nLine %d: sf_seek (SEEK_SET) followed by sf_readf_int failed (%d, %d).\n", __LINE__, orig [1], data [0]) ;
+			exit (1) ;
+			} ;
+
+		if ((k = sf_seek (file, 0, SEEK_CUR)) != seekpos + 1)
+		{	printf ("\n\nLine %d: sf_seek (SEEK_CUR) with 0 offset failed (%d should be %d)\n", __LINE__, k, seekpos + 1) ;
+			exit (1) ;
+			} ;
+
+		seekpos = sf_seek (file, 0, SEEK_CUR) + BUFFER_SIZE / 5 ;
+		k = sf_seek (file, BUFFER_SIZE / 5, SEEK_CUR) ;
+		test_readf_int_or_die (file, 0, data, 1, __LINE__) ;
+		if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin) || k != seekpos)
+		{	printf ("\nLine %d: sf_seek (forwards, SEEK_CUR) followed by sf_readf_int failed (%d, %d) (%d, %d).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos + 1) ;
+			exit (1) ;
+			} ;
+
+		seekpos = sf_seek (file, 0, SEEK_CUR) - 20 ;
+		/* Check seek backward from current position. */
+		k = sf_seek (file, -20, SEEK_CUR) ;
+		test_readf_int_or_die (file, 0, data, 1, __LINE__) ;
+		if (error_function (1.0 * data [0], 1.0 * orig [seekpos * channels], margin) || k != seekpos)
+		{	printf ("\nLine %d: sf_seek (backwards, SEEK_CUR) followed by sf_readf_int failed (%d, %d) (%d, %d).\n", __LINE__, data [0], orig [seekpos * channels], k, seekpos) ;
+			exit (1) ;
+			} ;
+
+		/* Check that read past end of file returns number of items. */
+		sf_seek (file, sfinfo.frames, SEEK_SET) ;
+
+	 	if ((k = sf_readf_int (file, data, datalen)) != 0)
+	 	{	printf ("\n\nLine %d: Return value from sf_readf_int past end of file incorrect (%d).\n", __LINE__, k) ;
+	 		exit (1) ;
+	 		} ;
+
+		/* Check seek backward from end. */
+
+		if ((k = sf_seek (file, 5 - sfinfo.frames, SEEK_END)) != 5)
+		{	printf ("\n\nLine %d: sf_seek (SEEK_END) returned %d instead of %d.\n", __LINE__, k, 5) ;
+			exit (1) ;
+			} ;
+
+		test_readf_int_or_die (file, 0, data, 1, __LINE__) ;
+		if (error_function (data [0] / scale, orig [5] / scale, margin))
+		{	printf ("\nLine %d: sf_seek (SEEK_END) followed by sf_readf_int failed (%d should be %d).\n", __LINE__, data [0], orig [5]) ;
+			exit (1) ;
+			} ;
+		} /* if (sfinfo.seekable) */
+
+	sf_close (file) ;
+
+	unlink (filename) ;
+	printf ("ok\n") ;
+} /* sdlcomp_test_int */
+
+static void
+sdlcomp_test_float	(const char *filename, int filetype, int channels, double margin)
+{	SNDFILE			*file ;
+	SF_INFO			sfinfo ;
+	int				k, m, seekpos ;
+	long			datalen ;
+	float			*orig, *data, *smooth ;
+	double			half_max_abs ;
+
+channels = 1 ;
+
+	print_test_name ("sdlcomp_test_float", filename) ;
+
+	if ((filetype & SF_FORMAT_SUBMASK) == SF_FORMAT_VORBIS)
+	{	puts ("Not working for this format.") ;
+		return ;
+		} ;
+
+printf ("** fix this ** ") ;
+
+	datalen = BUFFER_SIZE ;
+
+	orig = orig_buffer.f ;
+	data = data_buffer.f ;
+	smooth = smooth_buffer.f ;
+
+	gen_signal_double (orig_buffer.d, 32000.0, channels, datalen) ;
+	for (k = 0 ; k < datalen ; k++)
+		orig [k] = lrint (orig_buffer.d [k]) ;
+
+	sfinfo.samplerate	= SAMPLE_RATE ;
+	sfinfo.frames		= 123456789 ;	/* Ridiculous value. */
+	sfinfo.channels		= channels ;
+	sfinfo.format		= filetype ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_FALSE, __LINE__) ;
+	sf_command (file, SFC_SET_NORM_FLOAT, NULL, SF_FALSE) ;
+	test_write_float_or_die (file, 0, orig, datalen, __LINE__) ;
+	sf_set_string (file, SF_STR_COMMENT, long_comment) ;
+	sf_close (file) ;
+
+	memset (data, 0, datalen * sizeof (float)) ;
+
+	if ((filetype & SF_FORMAT_TYPEMASK) != SF_FORMAT_RAW)
+		memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	if ((sfinfo.format & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)) != (filetype & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)))
+	{	printf ("\n\nLine %d: Returned format incorrect (0x%08X => 0x%08X).\n", __LINE__, filetype, sfinfo.format) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames < datalen / channels)
+	{	printf ("Too few.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames > (datalen + 400))
+	{	printf ("Too many.frames in file. (%ld should be a little more than %ld)\n", SF_COUNT_TO_LONG (sfinfo.frames), datalen) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.channels != channels)
+	{	printf ("Incorrect number of channels in file.\n") ;
+		exit (1) ;
+		} ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	sf_command (file, SFC_SET_NORM_FLOAT, NULL, SF_FALSE) ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	test_read_float_or_die (file, 0, data, datalen, __LINE__) ;
+
+	memcpy (smooth, orig, datalen * sizeof (float)) ;
+	smoothed_diff_float (data, datalen) ;
+	smoothed_diff_float (smooth, datalen) ;
+
+	half_max_abs = fabs (data [0]) ;
+	for (k = 1 ; k < datalen ; k++)
+	{	if (error_function (data [k], smooth [k], margin))
+		{	printf ("\nLine %d: Incorrect sample (#%d : %d should be %d).\n", __LINE__, k, (int) data [k], (int) smooth [k]) ;
+			oct_save_float (orig, smooth, datalen) ;
+			exit (1) ;
+			} ;
+		half_max_abs = LCT_MAX (half_max_abs, abs (0.5 * data [k])) ;
+		} ;
+
+	if (half_max_abs <= 0.0)
+	{	printf ("\n\nLine %d: Signal is all zeros.\n", __LINE__) ;
+		printf ("half_max_abs : % 10.6f\n", half_max_abs) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_read_float (file, data, datalen)) != sfinfo.frames - datalen)
+	{	printf ("\n\nLine %d: Incorrect read length (%d should be %ld).\n", __LINE__, k, SF_COUNT_TO_LONG (sfinfo.frames - datalen)) ;
+		exit (1) ;
+		} ;
+
+	if ((sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_MS_ADPCM &&
+		(sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_GSM610)
+		for (k = 0 ; k < sfinfo.frames - datalen ; k++)
+			if (abs (data [k]) > decay_response (k))
+			{	printf ("\n\nLine %d: Incorrect sample (#%ld : abs (%d) should be < %d).\n", __LINE__, datalen + k, (int) data [k], (int) decay_response (k)) ;
+				exit (1) ;
+				} ;
+
+	/* Now test sf_seek function. */
+	if (sfinfo.seekable)
+	{	if ((k = sf_seek (file, 0, SEEK_SET)) != 0)
+		{	printf ("\n\nLine %d: Seek to start of file failed (%d).\n", __LINE__, k) ;
+			exit (1) ;
+			} ;
+
+		for (m = 0 ; m < 3 ; m++)
+		{	test_read_float_or_die (file, 0, data, datalen / 7, __LINE__) ;
+
+			smoothed_diff_float (data, datalen / 7) ;
+			memcpy (smooth, orig + m * datalen / 7, datalen / 7 * sizeof (float)) ;
+			smoothed_diff_float (smooth, datalen / 7) ;
+
+			for (k = 0 ; k < datalen / 7 ; k++)
+				if (error_function (data [k], smooth [k], margin))
+				{	printf ("\nLine %d: Incorrect sample C (#%d (%ld) : %d => %d).\n", __LINE__, k, k + m * (datalen / 7), (int) smooth [k], (int) data [k]) ;
+					for (m = 0 ; m < 10 ; m++)
+						printf ("%d ", (int) data [k]) ;
+					printf ("\n") ;
+					exit (1) ;
+					} ;
+			} ; /* for (m = 0 ; m < 3 ; m++) */
+
+		seekpos = BUFFER_SIZE / 10 ;
+
+		/* Check seek from start of file. */
+		if ((k = sf_seek (file, seekpos, SEEK_SET)) != seekpos)
+		{	printf ("Seek to start of file + %d failed (%d).\n", seekpos, k) ;
+			exit (1) ;
+			} ;
+		test_read_float_or_die (file, 0, data, channels, __LINE__) ;
+
+		if (error_function (data [0], orig [seekpos * channels], margin))
+		{	printf ("\nLine %d: sf_seek (SEEK_SET) followed by sf_read_float failed (%d, %d).\n", __LINE__, (int) orig [1], (int) data [0]) ;
+			exit (1) ;
+			} ;
+
+		if ((k = sf_seek (file, 0, SEEK_CUR)) != seekpos + 1)
+		{	printf ("\n\nLine %d: sf_seek (SEEK_CUR) with 0 offset failed (%d should be %d)\n", __LINE__, k, seekpos + 1) ;
+			exit (1) ;
+			} ;
+
+		seekpos = sf_seek (file, 0, SEEK_CUR) + BUFFER_SIZE / 5 ;
+		k = sf_seek (file, BUFFER_SIZE / 5, SEEK_CUR) ;
+		test_read_float_or_die (file, 0, data, channels, __LINE__) ;
+		if (error_function (data [0], orig [seekpos * channels], margin) || k != seekpos)
+		{	printf ("\nLine %d: sf_seek (forwards, SEEK_CUR) followed by sf_read_float failed (%d, %d) (%d, %d).\n", __LINE__, (int) data [0], (int) orig [seekpos * channels], k, seekpos + 1) ;
+			exit (1) ;
+			} ;
+
+		seekpos = sf_seek (file, 0, SEEK_CUR) - 20 ;
+		/* Check seek backward from current position. */
+		k = sf_seek (file, -20, SEEK_CUR) ;
+		test_read_float_or_die (file, 0, data, channels, __LINE__) ;
+		if (error_function (data [0], orig [seekpos * channels], margin) || k != seekpos)
+		{	printf ("\nLine %d: sf_seek (backwards, SEEK_CUR) followed by sf_read_float failed (%d, %d) (%d, %d).\n", __LINE__, (int) data [0], (int) orig [seekpos * channels], k, seekpos) ;
+			exit (1) ;
+			} ;
+
+		/* Check that read past end of file returns number of items. */
+		sf_seek (file, sfinfo.frames, SEEK_SET) ;
+
+	 	if ((k = sf_read_float (file, data, datalen)) != 0)
+	 	{	printf ("\n\nLine %d: Return value from sf_read_float past end of file incorrect (%d).\n", __LINE__, k) ;
+	 		exit (1) ;
+	 		} ;
+
+		/* Check seek backward from end. */
+
+		if ((k = sf_seek (file, 5 - sfinfo.frames, SEEK_END)) != 5)
+		{	printf ("\n\nLine %d: sf_seek (SEEK_END) returned %d instead of %d.\n", __LINE__, k, 5) ;
+			exit (1) ;
+			} ;
+
+		test_read_float_or_die (file, 0, data, channels, __LINE__) ;
+		if (error_function (data [0], orig [5 * channels], margin))
+		{	printf ("\nLine %d: sf_seek (SEEK_END) followed by sf_read_float failed (%f should be %f).\n", __LINE__, data [0], orig [5 * channels]) ;
+			exit (1) ;
+			} ;
+		} /* if (sfinfo.seekable) */
+
+	sf_close (file) ;
+
+	unlink (filename) ;
+	printf ("ok\n") ;
+} /* sdlcomp_test_float */
+
+static void
+sdlcomp_test_double	(const char *filename, int filetype, int channels, double margin)
+{	SNDFILE			*file ;
+	SF_INFO			sfinfo ;
+	int				k, m, seekpos ;
+	long			datalen ;
+	double			*orig, *data, *smooth, half_max_abs ;
+
+channels = 1 ;
+	print_test_name ("sdlcomp_test_double", filename) ;
+
+	if ((filetype & SF_FORMAT_SUBMASK) == SF_FORMAT_VORBIS)
+	{	puts ("Not working for this format.") ;
+		return ;
+		} ;
+
+	datalen = BUFFER_SIZE ;
+
+	orig = orig_buffer.d ;
+	data = data_buffer.d ;
+	smooth = smooth_buffer.d ;
+
+	gen_signal_double (orig_buffer.d, 32000.0, channels, datalen) ;
+
+	sfinfo.samplerate	= SAMPLE_RATE ;
+	sfinfo.frames		= 123456789 ;	/* Ridiculous value. */
+	sfinfo.channels		= channels ;
+	sfinfo.format		= filetype ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_FALSE, __LINE__) ;
+	sf_command (file, SFC_SET_NORM_DOUBLE, NULL, SF_FALSE) ;
+	test_write_double_or_die (file, 0, orig, datalen, __LINE__) ;
+	sf_set_string (file, SF_STR_COMMENT, long_comment) ;
+	sf_close (file) ;
+
+	memset (data, 0, datalen * sizeof (double)) ;
+
+	if ((filetype & SF_FORMAT_TYPEMASK) != SF_FORMAT_RAW)
+		memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	if (sfinfo.format != filetype)
+	{	printf ("Returned format incorrect (0x%08X => 0x%08X).\n", filetype, sfinfo.format) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames < datalen / channels)
+	{	printf ("Too few.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames > (datalen + 400))
+	{	printf ("Too many.frames in file. (%ld should be a little more than %ld)\n", SF_COUNT_TO_LONG (sfinfo.frames), datalen) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.channels != channels)
+	{	printf ("Incorrect number of channels in file.\n") ;
+		exit (1) ;
+		} ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	sf_command (file, SFC_SET_NORM_DOUBLE, NULL, SF_FALSE) ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	test_read_double_or_die (file, 0, data, datalen, __LINE__) ;
+
+	memcpy (smooth, orig, datalen * sizeof (double)) ;
+	smoothed_diff_double (data, datalen) ;
+	smoothed_diff_double (smooth, datalen) ;
+
+	half_max_abs = 0.0 ;
+	for (k = 0 ; k < datalen ; k++)
+	{	if (error_function (data [k], smooth [k], margin))
+		{	printf ("\n\nLine %d: Incorrect sample (#%d : %d should be %d).\n", __LINE__, k, (int) data [k], (int) smooth [k]) ;
+			oct_save_double (orig, smooth, datalen) ;
+			exit (1) ;
+			} ;
+		half_max_abs = LCT_MAX (half_max_abs, 0.5 * fabs (data [k])) ;
+		} ;
+
+	if (half_max_abs < 1.0)
+	{	printf ("\n\nLine %d: Signal is all zeros.\n", __LINE__) ;
+		exit (1) ;
+		} ;
+
+	if ((k = sf_read_double (file, data, datalen)) != sfinfo.frames - datalen)
+	{	printf ("\n\nLine %d: Incorrect read length (%d should be %ld).\n", __LINE__, k, SF_COUNT_TO_LONG (sfinfo.frames - datalen)) ;
+		exit (1) ;
+		} ;
+
+	if ((sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_MS_ADPCM &&
+		(sfinfo.format & SF_FORMAT_SUBMASK) != SF_FORMAT_GSM610)
+		for (k = 0 ; k < sfinfo.frames - datalen ; k++)
+			if (abs (data [k]) > decay_response (k))
+			{	printf ("\n\nLine %d: Incorrect sample (#%ld : abs (%d) should be < %d).\n", __LINE__, datalen + k, (int) data [k], (int) decay_response (k)) ;
+				exit (1) ;
+				} ;
+
+	/* Now test sf_seek function. */
+	if (sfinfo.seekable)
+	{	if ((k = sf_seek (file, 0, SEEK_SET)) != 0)
+		{	printf ("\n\nLine %d: Seek to start of file failed (%d).\n", __LINE__, k) ;
+			exit (1) ;
+			} ;
+
+		for (m = 0 ; m < 3 ; m++)
+		{	test_read_double_or_die (file, m, data, datalen / 7, __LINE__) ;
+
+			smoothed_diff_double (data, datalen / 7) ;
+			memcpy (smooth, orig + m * datalen / 7, datalen / 7 * sizeof (double)) ;
+			smoothed_diff_double (smooth, datalen / 7) ;
+
+			for (k = 0 ; k < datalen / 7 ; k++)
+				if (error_function (data [k], smooth [k], margin))
+				{	printf ("\nLine %d: Incorrect sample C (#%d (%ld) : %d => %d).\n", __LINE__, k, k + m * (datalen / 7), (int) smooth [k], (int) data [k]) ;
+					for (m = 0 ; m < 10 ; m++)
+						printf ("%d ", (int) data [k]) ;
+					printf ("\n") ;
+					exit (1) ;
+					} ;
+			} ; /* for (m = 0 ; m < 3 ; m++) */
+
+		seekpos = BUFFER_SIZE / 10 ;
+
+		/* Check seek from start of file. */
+		if ((k = sf_seek (file, seekpos, SEEK_SET)) != seekpos)
+		{	printf ("Seek to start of file + %d failed (%d).\n", seekpos, k) ;
+			exit (1) ;
+			} ;
+		test_read_double_or_die (file, 0, data, channels, __LINE__) ;
+
+		if (error_function (data [0], orig [seekpos * channels], margin))
+		{	printf ("\nLine %d: sf_seek (SEEK_SET) followed by sf_read_double failed (%d, %d).\n", __LINE__, (int) orig [1], (int) data [0]) ;
+			exit (1) ;
+			} ;
+
+		if ((k = sf_seek (file, 0, SEEK_CUR)) != seekpos + 1)
+		{	printf ("\n\nLine %d: sf_seek (SEEK_CUR) with 0 offset failed (%d should be %d)\n", __LINE__, k, seekpos + 1) ;
+			exit (1) ;
+			} ;
+
+		seekpos = sf_seek (file, 0, SEEK_CUR) + BUFFER_SIZE / 5 ;
+		k = sf_seek (file, BUFFER_SIZE / 5, SEEK_CUR) ;
+		test_read_double_or_die (file, 0, data, channels, __LINE__) ;
+		if (error_function (data [0], orig [seekpos * channels], margin) || k != seekpos)
+		{	printf ("\nLine %d: sf_seek (forwards, SEEK_CUR) followed by sf_read_double failed (%d, %d) (%d, %d).\n", __LINE__, (int) data [0], (int) orig [seekpos * channels], k, seekpos + 1) ;
+			exit (1) ;
+			} ;
+
+		seekpos = sf_seek (file, 0, SEEK_CUR) - 20 ;
+		/* Check seek backward from current position. */
+		k = sf_seek (file, -20, SEEK_CUR) ;
+		test_read_double_or_die (file, 0, data, channels, __LINE__) ;
+		if (error_function (data [0], orig [seekpos * channels], margin) || k != seekpos)
+		{	printf ("\nLine %d: sf_seek (backwards, SEEK_CUR) followed by sf_read_double failed (%d, %d) (%d, %d).\n", __LINE__, (int) data [0], (int) orig [seekpos * channels], k, seekpos) ;
+			exit (1) ;
+			} ;
+
+		/* Check that read past end of file returns number of items. */
+		sf_seek (file, sfinfo.frames, SEEK_SET) ;
+
+	 	if ((k = sf_read_double (file, data, datalen)) != 0)
+	 	{	printf ("\n\nLine %d: Return value from sf_read_double past end of file incorrect (%d).\n", __LINE__, k) ;
+	 		exit (1) ;
+	 		} ;
+
+		/* Check seek backward from end. */
+
+		if ((k = sf_seek (file, 5 - sfinfo.frames, SEEK_END)) != 5)
+		{	printf ("\n\nLine %d: sf_seek (SEEK_END) returned %d instead of %d.\n", __LINE__, k, 5) ;
+			exit (1) ;
+			} ;
+
+		test_read_double_or_die (file, 0, data, channels, __LINE__) ;
+		if (error_function (data [0], orig [5 * channels], margin))
+		{	printf ("\nLine %d: sf_seek (SEEK_END) followed by sf_read_double failed (%f should be %f).\n", __LINE__, data [0], orig [5 * channels]) ;
+			exit (1) ;
+			} ;
+		} /* if (sfinfo.seekable) */
+
+	sf_close (file) ;
+
+	unlink (filename) ;
+	printf ("ok\n") ;
+} /* sdlcomp_test_double */
+
+static void
+read_raw_test (const char *filename, int filetype, int channels)
+{	SNDFILE			*file ;
+	SF_INFO			sfinfo ;
+	sf_count_t		count ;
+	long			datalen ;
+	short			*orig, *data ;
+	int				k ;
+
+	print_test_name ("read_raw_test", filename) ;
+
+	datalen = ARRAY_LEN (orig_buffer.s) / 2 ;
+
+	orig = orig_buffer.s ;
+	data = data_buffer.s ;
+
+	gen_signal_double (orig_buffer.d, 32000.0, channels, datalen) ;
+	for (k = 0 ; k < datalen ; k++)
+		orig [k] = lrint (orig_buffer.d [k]) ;
+
+	sfinfo.samplerate	= SAMPLE_RATE ;
+	sfinfo.frames		= 123456789 ;	/* Ridiculous value. */
+	sfinfo.channels		= channels ;
+	sfinfo.format		= filetype ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_FALSE, __LINE__) ;
+	test_write_short_or_die (file, 0, orig, datalen, __LINE__) ;
+	sf_set_string (file, SF_STR_COMMENT, long_comment) ;
+	sf_close (file) ;
+
+	memset (data, 0, datalen * sizeof (double)) ;
+
+	if ((filetype & SF_FORMAT_TYPEMASK) != SF_FORMAT_RAW)
+		memset (&sfinfo, 0, sizeof (sfinfo)) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	if (sfinfo.format != filetype)
+	{	printf ("Returned format incorrect (0x%08X => 0x%08X).\n", filetype, sfinfo.format) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames < datalen / channels)
+	{	printf ("Too few.frames in file. (%ld should be a little more than %ld)\n", datalen, SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.frames > (datalen + 400))
+	{	printf ("Too many.frames in file. (%ld should be a little more than %ld)\n", SF_COUNT_TO_LONG (sfinfo.frames), datalen) ;
+		exit (1) ;
+		} ;
+
+	if (sfinfo.channels != channels)
+	{	printf ("Incorrect number of channels in file.\n") ;
+		exit (1) ;
+		} ;
+
+	check_comment (file, filetype, __LINE__) ;
+
+	count = sf_read_raw (file, orig_buffer.c, datalen + 5 * channels) ;
+	if (count != sfinfo.channels * sfinfo.frames)
+	{	printf ("\nLine %d : sf_read_raw returned %ld should be %ld\n", __LINE__, SF_COUNT_TO_LONG (count), sfinfo.channels * SF_COUNT_TO_LONG (sfinfo.frames)) ;
+		exit (1) ;
+		} ;
+
+	sf_close (file) ;
+
+	unlink (filename) ;
+	printf ("ok\n") ;
+} /* read_raw_test */
+
+/*========================================================================================
+**	Auxiliary functions
+*/
+
+#define		SIGNAL_MAXVAL	30000.0
+#define		DECAY_COUNT		1000
+
+static int
+decay_response (int k)
+{	if (k < 1)
+		return (int) (1.2 * SIGNAL_MAXVAL) ;
+	if (k > DECAY_COUNT)
+		return 0 ;
+	return (int) (1.2 * SIGNAL_MAXVAL * (DECAY_COUNT - k) / (1.0 * DECAY_COUNT)) ;
+} /* decay_response */
+
+static void
+gen_signal_double (double *data, double scale, int channels, int datalen)
+{	int		k, ramplen ;
+	double	amp = 0.0 ;
+
+	ramplen = DECAY_COUNT ;
+
+	if (channels == 1)
+	{	for (k = 0 ; k < datalen ; k++)
+		{	if (k <= ramplen)
+				amp = scale * k / ((double) ramplen) ;
+			else if (k > datalen - ramplen)
+				amp = scale * (datalen - k) / ((double) ramplen) ;
+
+/*-printf ("%3d : %g\n", k, amp) ;-*/
+
+			data [k] = amp * (0.4 * sin (33.3 * 2.0 * M_PI * ((double) (k+1)) / ((double) SAMPLE_RATE))
+							+ 0.3 * cos (201.1 * 2.0 * M_PI * ((double) (k+1)) / ((double) SAMPLE_RATE))) ;
+			} ;
+		}
+	else
+	{	for (k = 0 ; k < datalen ; k ++)
+		{	if (k <= ramplen)
+				amp = scale * k / ((double) ramplen) ;
+			else if (k > datalen - ramplen)
+				amp = scale * (datalen - k) / ((double) ramplen) ;
+
+			data [2 * k] = amp * (0.4 * sin (33.3 * 2.0 * M_PI * ((double) (k+1)) / ((double) SAMPLE_RATE))
+							+ 0.3 * cos (201.1 * 2.0 * M_PI * ((double) (k+1)) / ((double) SAMPLE_RATE))) ;
+			data [2 * k + 1] = amp * (0.4 * sin (55.5 * 2.0 * M_PI * ((double) (k+1)) / ((double) SAMPLE_RATE))
+							+ 0.3 * cos (201.1 * 2.0 * M_PI * ((double) (k+1)) / ((double) SAMPLE_RATE))) ;
+			} ;
+		} ;
+
+	return ;
+} /* gen_signal_double */
+
+static int
+error_function (double data, double orig, double margin)
+{	double error ;
+
+	if (fabs (orig) <= 500.0)
+		error = fabs (fabs (data) - fabs (orig)) / 2000.0 ;
+	else if (fabs (orig) <= 1000.0)
+		error = fabs (data - orig) / 3000.0 ;
+	else
+		error = fabs (data - orig) / fabs (orig) ;
+
+	if (error > margin)
+	{	printf ("\n\nerror_function (data = %f, orig = %f, margin = %f) -> %f\n", data, orig, margin, error) ;
+		return 1 ;
+		} ;
+	return 0 ;
+} /* error_function */
+
+static void
+smoothed_diff_short (short *data, unsigned int datalen)
+{	unsigned int k ;
+	double memory = 0.0 ;
+
+	/* Calculate the smoothed sample-to-sample difference. */
+	for (k = 0 ; k < datalen - 1 ; k++)
+	{	memory = 0.7 * memory + (1 - 0.7) * (double) (data [k+1] - data [k]) ;
+		data [k] = (short) memory ;
+		} ;
+	data [datalen-1] = data [datalen-2] ;
+
+} /* smoothed_diff_short */
+
+static void
+smoothed_diff_int (int *data, unsigned int datalen)
+{	unsigned int k ;
+	double memory = 0.0 ;
+
+	/* Calculate the smoothed sample-to-sample difference. */
+	for (k = 0 ; k < datalen - 1 ; k++)
+	{	memory = 0.7 * memory + (1 - 0.7) * (double) (data [k+1] - data [k]) ;
+		data [k] = (int) memory ;
+		} ;
+	data [datalen-1] = data [datalen-2] ;
+
+} /* smoothed_diff_int */
+
+static	void
+smoothed_diff_float (float *data, unsigned int datalen)
+{	unsigned int k ;
+	float memory = 0.0 ;
+
+	/* Calculate the smoothed sample-to-sample difference. */
+	for (k = 0 ; k < datalen - 1 ; k++)
+	{	memory = 0.7 * memory + (1 - 0.7) * (data [k+1] - data [k]) ;
+		data [k] = memory ;
+		} ;
+	data [datalen-1] = data [datalen-2] ;
+
+} /* smoothed_diff_float */
+
+static	void
+smoothed_diff_double (double *data, unsigned int datalen)
+{	unsigned int k ;
+	double memory = 0.0 ;
+
+	/* Calculate the smoothed sample-to-sample difference. */
+	for (k = 0 ; k < datalen - 1 ; k++)
+	{	memory = 0.7 * memory + (1 - 0.7) * (data [k+1] - data [k]) ;
+		data [k] = memory ;
+		} ;
+	data [datalen-1] = data [datalen-2] ;
+
+} /* smoothed_diff_double */
+
+static void
+check_comment (SNDFILE * file, int format, int lineno)
+{	const char		*comment ;
+
+	switch (format & SF_FORMAT_TYPEMASK)
+	{	case SF_FORMAT_AIFF :
+		case SF_FORMAT_WAV :
+		case SF_FORMAT_WAVEX :
+			break ;
+		default :
+			return ;
+		} ;
+
+	comment = sf_get_string (file, SF_STR_COMMENT) ;
+	if (comment == NULL)
+	{	printf ("\n\nLine %d : File does not contain a comment string.\n\n", lineno) ;
+		exit (1) ;
+		} ;
+
+	if (strcmp (comment, long_comment) != 0)
+	{	printf ("\n\nLine %d : File comment does not match comment written.\n\n", lineno) ;
+		exit (1) ;
+		} ;
+
+	return ;
+} /* check_comment */
+
+static int
+is_lossy (int filetype)
+{
+	switch (SF_FORMAT_SUBMASK & filetype)
+	{	case SF_FORMAT_PCM_U8 :
+		case SF_FORMAT_PCM_S8 :
+		case SF_FORMAT_PCM_16 :
+		case SF_FORMAT_PCM_24 :
+		case SF_FORMAT_PCM_32 :
+		case SF_FORMAT_FLOAT :
+		case SF_FORMAT_DOUBLE :
+			return 0 ;
+
+		default :
+			break ;
+		} ;
+
+	return 1 ;
+} /* is_lossy */
+