Do our own resampling

1 files changed, 0 insertions, 530 deletions

diff --git a/lib/libsamplerate/libsamplerate-0.2.2/tests/src-evaluate.c b/lib/libsamplerate/libsamplerate-0.2.2/tests/src-evaluate.c
deleted file mode 100755
index d55d6483..00000000
--- a/lib/libsamplerate/libsamplerate-0.2.2/tests/src-evaluate.c
+++ /dev/null
@@ -1,530 +0,0 @@
-/*
-** Copyright (c) 2002-2016, Erik de Castro Lopo <erikd@mega-nerd.com>
-** All rights reserved.
-**
-** This code is released under 2-clause BSD license. Please see the
-** file at : https://github.com/libsndfile/libsamplerate/blob/master/COPYING
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <string.h>
-#include <ctype.h>
-
-#if defined(_WIN32)
-#define popen _popen
-#define pclose _pclose
-#endif
-
-#if (HAVE_FFTW3 && HAVE_SNDFILE && HAVE_SYS_TIMES_H)
-
-#include <time.h>
-#include <sys/times.h>
-
-#include <sndfile.h>
-#include <math.h>
-#include <sys/utsname.h>
-
-#include "util.h"
-
-#define	MAX_FREQS		4
-#define	BUFFER_LEN		80000
-
-#define SAFE_STRNCAT(dest,src,len)								\
-		{	int safe_strncat_count ;							\
-			safe_strncat_count = (len) - strlen (dest) - 1 ;	\
-			strncat ((dest), (src), safe_strncat_count) ;		\
-			(dest) [(len) - 1] = 0 ;							\
-			} ;
-
-typedef struct
-{	int		freq_count ;
-	double	freqs [MAX_FREQS] ;
-
-	int		output_samplerate ;
-	int		pass_band_peaks ;
-
-	double	peak_value ;
-} SNR_TEST ;
-
-typedef struct
-{	const char	*progname ;
-	const char	*version_cmd ;
-	const char	*version_start ;
-	const char	*convert_cmd ;
-	int			format ;
-} RESAMPLE_PROG ;
-
-static char *get_progname (char *) ;
-static void usage_exit (const char *, const RESAMPLE_PROG *prog, int count) ;
-static void measure_program (const RESAMPLE_PROG *prog, int verbose) ;
-static void generate_source_wav (const char *filename, const double *freqs, int freq_count, int format) ;
-static const char* get_machine_details (void) ;
-
-static char	version_string [512] ;
-
-int
-main (int argc, char *argv [])
-{	static RESAMPLE_PROG resample_progs [] =
-	{	{	"sndfile-resample",
-			"examples/sndfile-resample --version",
-			"libsamplerate",
-			"examples/sndfile-resample --max-speed -c 0 -to %d source.wav destination.wav",
-			SF_FORMAT_WAV | SF_FORMAT_PCM_32
-			},
-		{	"sox",
-			"sox -h 2>&1",
-			"sox",
-			"sox source.wav -r %d destination.wav resample 0.835",
-			SF_FORMAT_WAV | SF_FORMAT_PCM_32
-			},
-		{	"ResampAudio",
-			"ResampAudio --version",
-			"ResampAudio",
-			"ResampAudio -f cutoff=0.41,atten=100,ratio=128 -s %d source.wav destination.wav",
-			SF_FORMAT_WAV | SF_FORMAT_PCM_32
-			},
-
-		/*-
-		{	/+*
-			** The Shibatch converter doesn't work for all combinations of
-			** source and destination sample rates. Therefore it can't be
-			** included in this test.
-			*+/
-			"shibatch",
-			"ssrc",
-			"Shibatch",
-			"ssrc --rate %d source.wav destination.wav",
-			SF_FORMAT_WAV | SF_FORMAT_PCM_32
-			},-*/
-
-		/*-
-		{	/+*
-			** The resample program is not able to match the bandwidth and SNR
-			** specs or sndfile-resample and hence will not be tested.
-			*+/
-			"resample",
-			"resample -version",
-			"resample",
-			"resample -to %d source.wav destination.wav",
-			SF_FORMAT_WAV | SF_FORMAT_FLOAT
-			},-*/
-
-		/*-
-		{	"mplayer",
-			"mplayer -v 2>&1",
-			"MPlayer ",
-			"mplayer -ao pcm -srate %d source.wav >/dev/null 2>&1 && mv audiodump.wav destination.wav",
-			SF_FORMAT_WAV | SF_FORMAT_PCM_32
-			},-*/
-
-		} ; /* resample_progs */
-
-	char	*progname ;
-	int 	prog = 0, verbose = 0 ;
-
-	progname = get_progname (argv [0]) ;
-
-	printf ("\n  %s : evaluate a sample rate converter.\n", progname) ;
-
-	if (argc == 3 && strcmp ("--verbose", argv [1]) == 0)
-	{	verbose = 1 ;
-		prog = atoi (argv [2]) ;
-		}
-	else if (argc == 2)
-	{	verbose = 0 ;
-		prog = atoi (argv [1]) ;
-		}
-	else
-		usage_exit (progname, resample_progs, ARRAY_LEN (resample_progs)) ;
-
-	if (prog < 0 || prog >= ARRAY_LEN (resample_progs))
-		usage_exit (progname, resample_progs, ARRAY_LEN (resample_progs)) ;
-
-	measure_program (& (resample_progs [prog]), verbose) ;
-
-	puts ("") ;
-
-	return 0 ;
-} /* main */
-
-/*==============================================================================
-*/
-
-static char *
-get_progname (char *progname)
-{	char *cptr ;
-
-	if ((cptr = strrchr (progname, '/')) != NULL)
-		progname = cptr + 1 ;
-
-	if ((cptr = strrchr (progname, '\\')) != NULL)
-		progname = cptr + 1 ;
-
-	return progname ;
-} /* get_progname */
-
-static void
-usage_exit (const char *progname, const RESAMPLE_PROG *prog, int count)
-{	int k ;
-
-	printf ("\n  Usage : %s <number>\n\n", progname) ;
-
-	puts ("  where <number> specifies the program to test:\n") ;
-
-	for (k = 0 ; k < count ; k++)
-		printf ("    %d : %s\n", k, prog [k].progname) ;
-
-	puts ("\n"
-		" Obviously to test a given program you have to have it available on\n"
-		" your system. See http://libsndfile.github.io/libsamplerate/quality.html for\n"
-		" the download location of these programs.\n") ;
-
-	exit (1) ;
-} /* usage_exit */
-
-static const char*
-get_machine_details (void)
-{	static char namestr [262] ;
-
-	struct utsname name ;
-
-	if (uname (&name) != 0)
-	{	snprintf (namestr, sizeof (namestr), "Unknown") ;
-		return namestr ;
-		} ;
-
-	snprintf (namestr, sizeof (namestr), "%s (%s %s %s)", name.nodename,
-			name.machine, name.sysname, name.release) ;
-
-	return namestr ;
-} /* get_machine_details */
-
-
-/*==============================================================================
-*/
-
-static void
-get_version_string (const RESAMPLE_PROG *prog)
-{	FILE *file ;
-	char *cptr ;
-
-	/* Default. */
-	snprintf (version_string, sizeof (version_string), "no version") ;
-
-	if (prog->version_cmd == NULL)
-		return ;
-
-	if ((file = popen (prog->version_cmd, "r")) == NULL)
-		return ;
-
-	while ((cptr = fgets (version_string, sizeof (version_string), file)) != NULL)
-	{
-		if (strstr (cptr, prog->version_start) != NULL)
-			break ;
-
-		version_string [0] = 0 ;
-		} ;
-
-	pclose (file) ;
-
-	/* Remove trailing newline. */
-	if ((cptr = strchr (version_string, '\n')) != NULL)
-		cptr [0] = 0 ;
-
-	/* Remove leading whitespace from version string. */
-	cptr = version_string ;
-	while (cptr [0] != 0 && isspace (cptr [0]))
-		cptr ++ ;
-
-	if (cptr != version_string)
-	{	strncpy (version_string, cptr, sizeof (version_string) - 1) ;
-		version_string [sizeof (version_string) - 1] = 0 ;
-		} ;
-
-	return ;
-} /* get_version_string */
-
-static void
-generate_source_wav (const char *filename, const double *freqs, int freq_count, int format)
-{	static float buffer [BUFFER_LEN] ;
-
-	SNDFILE *sndfile ;
-	SF_INFO sfinfo ;
-
-	sfinfo.channels = 1 ;
-	sfinfo.samplerate = 44100 ;
-	sfinfo.format = format ;
-
-	if ((sndfile = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL)
-	{	printf ("Line %d : cound not open '%s' : %s\n", __LINE__, filename, sf_strerror (NULL)) ;
-		exit (1) ;
-		} ;
-
-	sf_command (sndfile, SFC_SET_ADD_PEAK_CHUNK, NULL, SF_FALSE) ;
-
-	gen_windowed_sines (freq_count, freqs, 0.9, buffer, ARRAY_LEN (buffer)) ;
-
-	if (sf_write_float (sndfile, buffer, ARRAY_LEN (buffer)) != ARRAY_LEN (buffer))
-	{	printf ("Line %d : sf_write_float short write.\n", __LINE__) ;
-		exit (1) ;
-		} ;
-
-	sf_close (sndfile) ;
-} /* generate_source_wav */
-
-static double
-measure_destination_wav (char *filename, int *output_samples, int expected_peaks)
-{	static float buffer [250000] ;
-
-	SNDFILE *sndfile ;
-	SF_INFO sfinfo ;
-	double snr ;
-
-	if ((sndfile = sf_open (filename, SFM_READ, &sfinfo)) == NULL)
-	{	printf ("Line %d : Cound not open '%s' : %s\n", __LINE__, filename, sf_strerror (NULL)) ;
-		exit (1) ;
-		} ;
-
-	if (sfinfo.channels != 1)
-	{	printf ("Line %d : Bad channel count (%d). Should be 1.\n", __LINE__, sfinfo.channels) ;
-		exit (1) ;
-		} ;
-
-	if (sfinfo.frames > ARRAY_LEN (buffer))
-	{	printf ("Line %d : Too many frames (%ld) of data in file.\n", __LINE__, (long) sfinfo.frames) ;
-		exit (1) ;
-		} ;
-
-	*output_samples = (int) sfinfo.frames ;
-
-	if (sf_read_float (sndfile, buffer, sfinfo.frames) != sfinfo.frames)
-	{	printf ("Line %d : Bad read.\n", __LINE__) ;
-		exit (1) ;
-		} ;
-
-	sf_close (sndfile) ;
-
-	snr = calculate_snr (buffer, sfinfo.frames, expected_peaks) ;
-
-	return snr ;
-} /* measure_desination_wav */
-
-static double
-measure_snr (const RESAMPLE_PROG *prog, int *output_samples, int verbose)
-{	static SNR_TEST snr_test [] =
-	{
-		{	1,	{ 0.211111111111 },		48000,		1,	1.0 },
-		{	1,	{ 0.011111111111 },		132301,		1,	1.0 },
-		{	1,	{ 0.111111111111 },		92301,		1,	1.0 },
-		{	1,	{ 0.011111111111 },		26461,		1,	1.0 },
-		{	1,	{ 0.011111111111 },		13231,		1,	1.0 },
-		{	1,	{ 0.011111111111 },		44101,		1,	1.0 },
-		{	2,	{ 0.311111, 0.49 },		78199,		2,	1.0 },
-		{	2,	{ 0.011111, 0.49 },		12345,		1,	0.5 },
-		{	2,	{ 0.0123456, 0.4 },		20143,		1,	0.5 },
-		{	2,	{ 0.0111111, 0.4 },		26461,		1,	0.5 },
-		{	1,	{ 0.381111111111 },		58661,		1,	1.0 }
-		} ; /* snr_test */
-	static char command [256] ;
-
-	double snr, worst_snr = 500.0 ;
-	int k , retval, sample_count ;
-
-	*output_samples = 0 ;
-
-	for (k = 0 ; k < ARRAY_LEN (snr_test) ; k++)
-	{	remove ("source.wav") ;
-		remove ("destination.wav") ;
-
-		if (verbose)
-			printf ("       SNR test #%d : ", k) ;
-		fflush (stdout) ;
-		generate_source_wav ("source.wav", snr_test [k].freqs, snr_test [k].freq_count, prog->format) ;
-
-		snprintf (command, sizeof (command), prog->convert_cmd, snr_test [k].output_samplerate) ;
-		SAFE_STRNCAT (command, " >/dev/null 2>&1", sizeof (command)) ;
-		if ((retval = system (command)) != 0)
-			printf ("system returned %d\n", retval) ;
-
-		snr = measure_destination_wav ("destination.wav", &sample_count, snr_test->pass_band_peaks) ;
-
-		*output_samples += sample_count ;
-
-		if (fabs (snr) < fabs (worst_snr))
-			worst_snr = fabs (snr) ;
-
-		if (verbose)
-			printf ("%6.2f dB\n", snr) ;
-		} ;
-
-	return worst_snr ;
-} /* measure_snr */
-
-/*------------------------------------------------------------------------------
-*/
-
-static double
-measure_destination_peak (const char *filename)
-{	static float data [2 * BUFFER_LEN] ;
-	SNDFILE		*sndfile ;
-	SF_INFO		sfinfo ;
-	double		peak = 0.0 ;
-	int			k = 0 ;
-
-	if ((sndfile = sf_open (filename, SFM_READ, &sfinfo)) == NULL)
-	{	printf ("Line %d : failed to open file %s\n", __LINE__, filename) ;
-		exit (1) ;
-		} ;
-
-	if (sfinfo.channels != 1)
-	{	printf ("Line %d : bad channel count.\n", __LINE__) ;
-		exit (1) ;
-		} ;
-
-	if (sfinfo.frames > ARRAY_LEN (data) + 4 || sfinfo.frames < ARRAY_LEN (data) - 100)
-	{	printf ("Line %d : bad frame count (got %d, expected %d).\n", __LINE__, (int) sfinfo.frames, ARRAY_LEN (data)) ;
-		exit (1) ;
-		} ;
-
-	if (sf_read_float (sndfile, data, sfinfo.frames) != sfinfo.frames)
-	{	printf ("Line %d : bad read.\n", __LINE__) ;
-		exit (1) ;
-		} ;
-
-	sf_close (sndfile) ;
-
-	for (k = 0 ; k < (int) sfinfo.frames ; k++)
-		if (fabs (data [k]) > peak)
-			peak = fabs (data [k]) ;
-
-	return peak ;
-} /* measure_destination_peak */
-
-static double
-find_attenuation (double freq, const RESAMPLE_PROG *prog, int verbose)
-{	static char	command [256] ;
-	double	output_peak ;
-	int		retval ;
-	char	*filename ;
-
-	filename = "destination.wav" ;
-
-	generate_source_wav ("source.wav", &freq, 1, prog->format) ;
-
-	remove (filename) ;
-
-	snprintf (command, sizeof (command), prog->convert_cmd, 88189) ;
-	SAFE_STRNCAT (command, " >/dev/null 2>&1", sizeof (command)) ;
-	if ((retval = system (command)) != 0)
-		printf ("system returned %d\n", retval) ;
-
-	output_peak = measure_destination_peak (filename) ;
-
-	if (verbose)
-		printf ("        freq : %f     peak : %f\n", freq, output_peak) ;
-
-	return fabs (20.0 * log10 (output_peak)) ;
-} /* find_attenuation */
-
-static double
-bandwidth_test (const RESAMPLE_PROG *prog, int verbose)
-{	double	f1, f2, a1, a2 ;
-	double	freq, atten ;
-
-	f1 = 0.35 ;
-	a1 = find_attenuation (f1, prog, verbose) ;
-
-	f2 = 0.49999 ;
-	a2 = find_attenuation (f2, prog, verbose) ;
-
-
-	if (fabs (a1) < 1e-2 && a2 < 3.0)
-		return -1.0 ;
-
-	if (a1 > 3.0 || a2 < 3.0)
-	{	printf ("\n\nLine %d : cannot bracket 3dB point.\n\n", __LINE__) ;
-		exit (1) ;
-		} ;
-
-	while (a2 - a1 > 1.0)
-	{	freq = f1 + 0.5 * (f2 - f1) ;
-		atten = find_attenuation (freq, prog, verbose) ;
-
-		if (atten < 3.0)
-		{	f1 = freq ;
-			a1 = atten ;
-			}
-		else
-		{	f2 = freq ;
-			a2 = atten ;
-			} ;
-		} ;
-
-	freq = f1 + (3.0 - a1) * (f2 - f1) / (a2 - a1) ;
-
-	return 200.0 * freq ;
-} /* bandwidth_test */
-
-static void
-measure_program (const RESAMPLE_PROG *prog, int verbose)
-{	double	snr, bandwidth, conversion_rate ;
-	int		output_samples ;
-	struct	tms	time_data ;
-	time_t	time_now ;
-
-	printf ("\n  Machine : %s\n", get_machine_details ()) ;
-	time_now = time (NULL) ;
-	printf ("  Date    : %s", ctime (&time_now)) ;
-
-	get_version_string (prog) ;
-	printf ("  Program : %s\n", version_string) ;
-	printf ("  Command : %s\n\n", prog->convert_cmd) ;
-
-	snr = measure_snr (prog, &output_samples, verbose) ;
-
-	printf ("  Worst case SNR     : %6.2f dB\n", snr) ;
-
-	times (&time_data) ;
-
-	conversion_rate = (1.0 * output_samples * sysconf (_SC_CLK_TCK)) / time_data.tms_cutime ;
-
-	printf ("  Conversion rate    : %5.0f samples/sec\n", conversion_rate) ;
-
-	bandwidth = bandwidth_test (prog, verbose) ;
-
-	if (bandwidth > 0.0)
-		printf ("  Measured bandwidth : %5.2f %%\n", bandwidth) ;
-	else
-		printf ("  Could not measure bandwidth (no -3dB point found).\n") ;
-
-	return ;
-} /* measure_program */
-
-/*##############################################################################
-*/
-
-#else
-
-int
-main (void)
-{	puts ("\n"
-		"****************************************************************\n"
-		" This program has been compiled without :\n"
-		"	1) FFTW (http://www.fftw.org/).\n"
-		"	2) libsndfile (http://www.zip.com.au/~erikd/libsndfile/).\n"
-		" Without these two libraries there is not much it can do.\n"
-		"****************************************************************\n") ;
-
-	return 0 ;
-} /* main */
-
-#endif /* (HAVE_FFTW3 && HAVE_SNDFILE) */
-