shithub: libsamplerate

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examples/sndfile-resample.c : Add a --no-normalize cmd line option.

--- a/ChangeLog

+++ b/ChangeLog

@@ -1,3 +1,9 @@

+2012-10-07  Erik de Castro Lopo  <erikd AT mega-nerd DOT com>

+

+    * examples/sndfile-resample.c

+    Add a --no-normalize cmd line option. Thanks to Adriano Moura for the

+    patch.

+

 2012-09-28  Erik de Castro Lopo  <erikd AT mega-nerd DOT com>

     * tests/varispeed_test.c

--- a/examples/sndfile-resample.c

+++ b/examples/sndfile-resample.c

@@ -1,5 +1,5 @@

 /*

-** Copyright (C) 2002-2011 Erik de Castro Lopo <erikd@mega-nerd.com>

+** Copyright (C) 2002-2012 Erik de Castro Lopo <erikd@mega-nerd.com>

 **

 ** 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

@@ -34,7 +34,7 @@

 #define	BUFFER_LEN		4096	/*-(1<<16)-*/

 static void usage_exit (const char *progname) ;

-static sf_count_t sample_rate_convert (SNDFILE *infile, SNDFILE *outfile, int converter, double src_ratio, int channels, double * gain) ;

+static sf_count_t sample_rate_convert (SNDFILE *infile, SNDFILE *outfile, int converter, double src_ratio, int channels, double * gain, int normalize) ;

 static double apply_gain (float * data, long frames, int channels, double max, double gain) ;

 int

@@ -42,6 +42,7 @@

 {	SNDFILE	*infile, *outfile = NULL ;

 	SF_INFO sfinfo ;

+	int normalize = 1 ;

 	sf_count_t	count ;

 	double		src_ratio = -1.0, gain = 1.0 ;

 	int			new_sample_rate = -1, k, converter, max_speed = SF_FALSE ;

@@ -69,6 +70,8 @@

 	for (k = 1 ; k < argc - 2 ; k++)

 	{	if (strcmp (argv [k], "--max-speed") == 0)

 			max_speed = SF_TRUE ;

+		else if (strcmp (argv [k], "--no-normalize") == 0)

+			normalize = 0 ;

 		else if (strcmp (argv [k], "-to") == 0)

 		{	k ++ ;

 			new_sample_rate = atoi (argv [k]) ;

@@ -160,7 +163,7 @@

 		sf_command (outfile, SFC_SET_CLIPPING, NULL, SF_TRUE) ;

-		count = sample_rate_convert (infile, outfile, converter, src_ratio, sfinfo.channels, &gain) ;

+		count = sample_rate_convert (infile, outfile, converter, src_ratio, sfinfo.channels, &gain, normalize) ;

 		}

 	while (count < 0) ;

@@ -176,7 +179,7 @@

 */

 static sf_count_t

-sample_rate_convert (SNDFILE *infile, SNDFILE *outfile, int converter, double src_ratio, int channels, double * gain)

+sample_rate_convert (SNDFILE *infile, SNDFILE *outfile, int converter, double src_ratio, int channels, double * gain, int normalize)

 {	static float input [BUFFER_LEN] ;

 	static float output [BUFFER_LEN] ;

@@ -239,7 +242,7 @@

 	src_delete (src_state) ;

-	if (max > 1.0)

+	if (normalize && max > 1.0)

 	{	*gain = 1.0 / max ;

 		printf ("\nOutput has clipped. Restarting conversion to prevent clipping.\n\n") ;

 		return -1 ;

@@ -300,6 +303,9 @@

 	for (k = 0 ; (cptr = src_get_name (k)) != NULL ; k++)

 		printf ("       %d : %s%s\n", k, cptr, k == DEFAULT_CONVERTER ? " (default)" : "") ;

+

+	puts ("\n"

+		"  The --no-normalize option disables clipping check and normalization.") ;

 	puts ("") ;