Add new example program sndfile-cmp.c, contributed by Conrad Parker. Hook into build.

ChangeLog

@@ -1,3 +1,11 @@
+2008-01-09  Erik de Castro Lopo  <erikd AT mega-nerd DOT com>
+
+    * examples/sndfile-cmp.c
+    Add new example program contributed by Conrad Parker.
+
+    * examples/Makefile.am
+    Hook into build.
+
 2008-01-08  Erik de Castro Lopo  <erikd AT mega-nerd DOT com>
 
     * tests/win32_test.c

examples/Makefile.am

@@ -1,6 +1,6 @@
 ## Process this file with automake to produce Makefile.in
 
-bin_PROGRAMS = sndfile-info sndfile-play sndfile-convert sndfile-jackplay
+bin_PROGRAMS = sndfile-info sndfile-play sndfile-convert sndfile-jackplay sndfile-cmp
 
 noinst_PROGRAMS = sndfile-data-trim make_sine sfprocess list_formats generate sndfilehandle
 
@@ -27,6 +27,9 @@ sndfile_jackplay_LDADD = $(SNDFILEDIR)/libsndfile.la $(JACK_LIBS)
 sndfile_convert_SOURCES = sndfile-convert.c
 sndfile_convert_LDADD = $(SNDFILEDIR)/libsndfile.la
 
+sndfile_cmp_SOURCES = sndfile-cmp.c
+sndfile_cmp_LDADD = $(SNDFILEDIR)/libsndfile.la
+
 sndfile_data_trim_SOURCES = sndfile-data-trim.c
 sndfile_data_trim_LDADD = $(SNDFILEDIR)/libsndfile.la
 

examples/sndfile-cmp.c

@@ -0,0 +1,159 @@
+/*
+** Copyright (C) 2008 Erik de Castro Lopo <erikd@mega-nerd.com>
+**
+** All rights reserved.
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in
+**       the documentation and/or other materials provided with the
+**       distribution.
+**     * Neither the author nor the names of any contributors may be used
+**       to endorse or promote products derived from this software without
+**       specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/* sndfile-cmp.c
+ * Conrad Parker 2008
+ */
+
+
+#include "sfconfig.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include <sndfile.h>
+
+/* Length of comparison data buffers in units of items */
+#define BUFLEN 65536
+
+static char * progname ;
+static char * filename1, * filename2 ;
+
+static int
+comparison_error (const char * what)
+{	printf ("%s: %s of files %s and %s differ\n", progname, what, filename1, filename2) ;
+	return 1 ;
+} /* comparison_error */
+
+static int
+compare (void)
+{
+	double buf1 [BUFLEN], buf2 [BUFLEN] ;
+	SF_INFO sfinfo1, sfinfo2 ;
+	SNDFILE * sf1 = NULL, * sf2 = NULL ;
+	sf_count_t len, i, nread1, nread2 ;
+	int retval = 0 ;
+
+	memset (&sfinfo1, 0, sizeof (SF_INFO)) ;
+	sf1 = sf_open (filename1, SFM_READ, &sfinfo1) ;
+	if (sf1 == NULL)
+	{	printf ("Error opening %s.\n", filename1) ;
+		retval = 1 ;
+		goto out ;
+		} ;
+
+	memset (&sfinfo2, 0, sizeof (SF_INFO)) ;
+	sf2 = sf_open (filename2, SFM_READ, &sfinfo2) ;
+	if (sf2 == NULL)
+	{	printf ("Error opening %s.\n", filename2) ;
+		retval = 1 ;
+		goto out ;
+		} ;
+
+	if (sfinfo1.samplerate != sfinfo2.samplerate)
+	{	retval = comparison_error ("Samplerates") ;
+		goto out ;
+		} ;
+
+	if (sfinfo1.channels != sfinfo2.channels)
+	{	retval = comparison_error ("Number of channels") ;
+		goto out ;
+		} ;
+
+	/* Calculate the framecount that will fit in our data buffers */
+	len = BUFLEN / sfinfo1.channels ;
+
+	while ( (nread1 = sf_readf_double (sf1, buf1, len)) > 0)
+	{	nread2 = sf_readf_double (sf2, buf2, nread1) ;
+		if (nread2 != nread1)
+		{	retval = comparison_error ("PCM data lengths") ;
+			goto out ;
+			} ;
+		for (i = 0 ; i < nread1 ; i++)
+		{	if (buf1 [i] != buf2 [i])
+			{	retval = comparison_error ("PCM data") ;
+				goto out ;
+				} ;
+			} ;
+		} ;
+
+	if ( (nread2 = sf_readf_double (sf2, buf2, nread1)) != 0)
+	{	retval = comparison_error ("PCM data lengths") ;
+		goto out ;
+		} ;
+
+out :
+	sf_close (sf1) ;
+	sf_close (sf2) ;
+
+	return retval ;
+} /* compare */
+
+static void
+print_version (void)
+{	char buffer [256] ;
+
+	sf_command (NULL, SFC_GET_LIB_VERSION, buffer, sizeof (buffer)) ;
+	printf ("\nVersion : %s\n\n", buffer) ;
+} /* print_version */
+
+static void
+print_usage (void)
+{
+	print_version () ;
+
+	printf ("Usage : %s <filename> <filename>\n", progname) ;
+	printf ("	Compare the PCM data of two sound files.\n\n") ;
+} /* print_usage */
+
+int
+main (int argc, char *argv [])
+{
+	progname = strrchr (argv [0], '/') ;
+	progname = progname ? progname + 1 : argv [0] ;
+
+	if (argc != 3)
+	{	print_usage () ;
+		return 1 ;
+		} ;
+
+	filename1 = argv [argc - 2] ;
+	filename2 = argv [argc - 1] ;
+
+	if (strcmp (filename1, filename2) == 0)
+	{	printf ("Error : Input filenames are the same.\n\n") ;
+		print_usage () ;
+		return 1 ;
+		} ;
+
+	return compare () ;
+} /* main */