shithub: libsamplerate

--- a/Makefile.am

+++ b/Makefile.am

@@ -67,13 +67,6 @@

 examples_timewarp_file_CFLAGS = $(SNDFILE_CFLAGS) $(ALSA_CFLAGS)

 examples_timewarp_file_LDADD = src/libsamplerate.la $(SNDFILE_LIBS) $(ALSA_LIBS)

-if HAVE_LIBSNDFILE

-bin_PROGRAMS = examples/sndfile-resample

-examples_sndfile_resample_SOURCES = examples/sndfile-resample.c

-examples_sndfile_resample_CFLAGS = $(SNDFILE_CFLAGS) $(ALSA_CFLAGS)

-examples_sndfile_resample_LDADD = src/libsamplerate.la $(SNDFILE_LIBS) $(ALSA_LIBS)

-endif

 ##########

 # tests/ #

 ##########

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

+++ /dev/null

@@ -1,328 +1,0 @@

-/*

-** Copyright (c) 2002-2016, Erik de Castro Lopo <[email protected]>

-** All rights reserved.

-**

-** This code is released under 2-clause BSD license. Please see the

-** file at : https://github.com/erikd/libsamplerate/blob/master/COPYING

-*/

-#include "config.h"

-#include <stdio.h>

-#include <stdlib.h>

-#include <unistd.h>

-#include <string.h>

-#include <math.h>

-#if (HAVE_SNDFILE)

-#include <samplerate.h>

-#include <sndfile.h>

-#define DEFAULT_CONVERTER SRC_SINC_MEDIUM_QUALITY

-#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, int normalize) ;

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

-int

-main (int argc, char *argv [])

-{	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 ;

-	if (argc == 2 && strcmp (argv [1], "--version") == 0)

-	{	char buffer [64], *cptr ;

-		if ((cptr = strrchr (argv [0], '/')) != NULL)

-			argv [0] = cptr + 1 ;

-		if ((cptr = strrchr (argv [0], '\\')) != NULL)

-			argv [0] = cptr + 1 ;

-		sf_command (NULL, SFC_GET_LIB_VERSION, buffer, sizeof (buffer)) ;

-		printf ("%s (%s,%s)\n", argv [0], src_get_version (), buffer) ;

-		exit (0) ;

-		} ;

-	if (argc != 5 && argc != 7 && argc != 8)

-		usage_exit (argv [0]) ;

-	/* Set default converter. */

-	converter = DEFAULT_CONVERTER ;

-	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]) ;

-			}

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

-		{	k ++ ;

-			src_ratio = atof (argv [k]) ;

-			}

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

-		{	k ++ ;

-			converter = atoi (argv [k]) ;

-			}

-		else

-			usage_exit (argv [0]) ;

-		} ;

-	if (new_sample_rate <= 0 && src_ratio <= 0.0)

-		usage_exit (argv [0]) ;

-	if (src_get_name (converter) == NULL)

-	{	printf ("Error : bad converter number.\n") ;

-		usage_exit (argv [0]) ;

-		} ;

-	if (strcmp (argv [argc - 2], argv [argc - 1]) == 0)

-	{	printf ("Error : input and output file names are the same.\n") ;

-		exit (1) ;

-		} ;

-	if ((infile = sf_open (argv [argc - 2], SFM_READ, &sfinfo)) == NULL)

-	{	printf ("Error : Not able to open input file '%s'\n", argv [argc - 2]) ;

-		exit (1) ;

-		} ;

-	printf ("Input File    : %s\n", argv [argc - 2]) ;

-	printf ("Sample Rate   : %d\n", sfinfo.samplerate) ;

-	printf ("Input Frames  : %ld\n\n", (long) sfinfo.frames) ;

-	if (new_sample_rate > 0)

-	{	src_ratio = (1.0 * new_sample_rate) / sfinfo.samplerate ;

-		sfinfo.samplerate = new_sample_rate ;

-		}

-	else if (src_is_valid_ratio (src_ratio))

-		sfinfo.samplerate = (int) floor (sfinfo.samplerate * src_ratio) ;

-	else

-	{	printf ("Not able to determine new sample rate. Exiting.\n") ;

-		sf_close (infile) ;

-		exit (1) ;

-		} ;

-	if (fabs (src_ratio - 1.0) < 1e-20)

-	{	printf ("Target samplerate and input samplerate are the same. Exiting.\n") ;

-		sf_close (infile) ;

-		exit (0) ;

-		} ;

-	printf ("SRC Ratio     : %f\n", src_ratio) ;

-	printf ("Converter     : %s\n\n", src_get_name (converter)) ;

-	if (src_is_valid_ratio (src_ratio) == 0)

-	{	printf ("Error : Sample rate change out of valid range.\n") ;

-		sf_close (infile) ;

-		exit (1) ;

-		} ;

-	/* Delete the output file length to zero if already exists. */

-	remove (argv [argc - 1]) ;

-	printf ("Output file   : %s\n", argv [argc - 1]) ;

-	printf ("Sample Rate   : %d\n", sfinfo.samplerate) ;

-	do

-	{	sf_close (outfile) ;

-		if ((outfile = sf_open (argv [argc - 1], SFM_WRITE, &sfinfo)) == NULL)

-		{	printf ("Error : Not able to open output file '%s'\n", argv [argc - 1]) ;

-			sf_close (infile) ;

-			exit (1) ;

-			} ;

-		if (max_speed)

-		{	/* This is mainly for the comparison program tests/src-evaluate.c */

-			sf_command (outfile, SFC_SET_ADD_PEAK_CHUNK, NULL, SF_FALSE) ;

-			}

-		else

-		{	/* Update the file header after every write. */

-			sf_command (outfile, SFC_SET_UPDATE_HEADER_AUTO, NULL, SF_TRUE) ;

-			} ;

-		sf_command (outfile, SFC_SET_CLIPPING, NULL, SF_TRUE) ;

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

-		}

-	while (count < 0) ;

-	printf ("Output Frames : %ld\n\n", (long) count) ;

-	sf_close (infile) ;

-	sf_close (outfile) ;

-	return 0 ;

-} /* main */

-/*==============================================================================

-*/

-static sf_count_t

-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] ;

-	SRC_STATE	*src_state ;

-	SRC_DATA	src_data ;

-	int			error ;

-	double		max = 0.0 ;

-	sf_count_t	output_count = 0 ;

-	sf_seek (infile, 0, SEEK_SET) ;

-	sf_seek (outfile, 0, SEEK_SET) ;

-	/* Initialize the sample rate converter. */

-	if ((src_state = src_new (converter, channels, &error)) == NULL)

-	{	printf ("\n\nError : src_new() failed : %s.\n\n", src_strerror (error)) ;

-		exit (1) ;

-		} ;

-	src_data.end_of_input = 0 ; /* Set this later. */

-	/* Start with zero to force load in while loop. */

-	src_data.input_frames = 0 ;

-	src_data.data_in = input ;

-	src_data.src_ratio = src_ratio ;

-	src_data.data_out = output ;

-	src_data.output_frames = BUFFER_LEN /channels ;

-	while (1)

-	{

-		/* If the input buffer is empty, refill it. */

-		if (src_data.input_frames == 0)

-		{	src_data.input_frames = sf_readf_float (infile, input, BUFFER_LEN / channels) ;

-			src_data.data_in = input ;

-			/* The last read will not be a full buffer, so snd_of_input. */

-			if (src_data.input_frames < BUFFER_LEN / channels)

-				src_data.end_of_input = SF_TRUE ;

-			} ;

-		if ((error = src_process (src_state, &src_data)))

-		{	printf ("\nError : %s\n", src_strerror (error)) ;

-			exit (1) ;

-			} ;

-		/* Terminate if done. */

-		if (src_data.end_of_input && src_data.output_frames_gen == 0)

-			break ;

-		max = apply_gain (src_data.data_out, src_data.output_frames_gen, channels, max, *gain) ;

-		/* Write output. */

-		sf_writef_float (outfile, output, src_data.output_frames_gen) ;

-		output_count += src_data.output_frames_gen ;

-		src_data.data_in += src_data.input_frames_used * channels ;

-		src_data.input_frames -= src_data.input_frames_used ;

-		} ;

-	src_delete (src_state) ;

-	if (normalize && max > 1.0)

-	{	*gain = 1.0 / max ;

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

-		return -1 ;

-		} ;

-	return output_count ;

-} /* sample_rate_convert */

-static double

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

-{

-	long k ;

-	for (k = 0 ; k < frames * channels ; k++)

-	{	data [k] *= gain ;

-		if (fabs (data [k]) > max)

-			max = fabs (data [k]) ;

-		} ;

-	return max ;

-} /* apply_gain */

-static void

-usage_exit (const char *progname)

-{	char lsf_ver [128] ;

-	const char	*cptr ;

-	int		k ;

-	if ((cptr = strrchr (progname, '/')) != NULL)

-		progname = cptr + 1 ;

-	if ((cptr = strrchr (progname, '\\')) != NULL)

-		progname = cptr + 1 ;

-	sf_command (NULL, SFC_GET_LIB_VERSION, lsf_ver, sizeof (lsf_ver)) ;

-	printf ("\n"

-		"  A Sample Rate Converter using libsndfile for file I/O and Secret \n"

-		"  Rabbit Code (aka libsamplerate) for performing the conversion.\n"

-		"  It works on any file format supported by libsndfile with any \n"

-		"  number of channels (limited only by host memory).\n"

-		"\n"

-		"       %s\n"

-		"       %s\n"

-		"\n"

-		"  Usage : \n"

-		"       %s -to <new sample rate> [-c <number>] <input file> <output file>\n"

-		"       %s -by <amount> [-c <number>] <input file> <output file>\n"

-		"\n", src_get_version (), lsf_ver, progname, progname) ;

-	puts (

-		"  The optional -c argument allows the converter type to be chosen from\n"

-		"  the following list :"

-		"\n"

-		) ;

-	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 ("") ;

-	exit (1) ;

-} /* usage_exit */

-/*==============================================================================

-*/

-#else /* (HAVE_SNFILE == 0) */

-/* Alternative main function when libsndfile is not available. */

-int

-main (void)

-{	puts (

-		"\n"

-		"****************************************************************\n"

-		"  This example program was compiled without libsndfile \n"

-		"  (http://www.mega-nerd.com/libsndfile/).\n"

-		"  It is therefore completely broken and non-functional.\n"

-		"****************************************************************\n"

-		"\n"

-		) ;

-	return 0 ;

-} /* main */

-#endif