Do our own resampling

1 files changed, 0 insertions, 246 deletions

diff --git a/lib/libsamplerate/libsamplerate-0.2.2/examples/varispeed-play.c b/lib/libsamplerate/libsamplerate-0.2.2/examples/varispeed-play.c
deleted file mode 100755
index 72a5a9c3..00000000
--- a/lib/libsamplerate/libsamplerate-0.2.2/examples/varispeed-play.c
+++ /dev/null
@@ -1,246 +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 <math.h>
-
-#if (HAVE_SNDFILE)
-
-#include <samplerate.h>
-#include <sndfile.h>
-
-#include "audio_out.h"
-
-#define ARRAY_LEN(x)	((int) (sizeof (x) / sizeof ((x) [0])))
-
-#define	BUFFER_LEN			4096
-#define	VARISPEED_BLOCK_LEN	64
-
-#define	MIN(a,b)		((a) < (b) ? (a) : (b))
-
-#define	SRC_MAGIC		((int) ('S' << 16) + ('R' << 8) + ('C'))
-#define	SNDFILE_MAGIC	((int) ('s' << 24) + ('n' << 20) + ('d' << 16) + ('f' << 12) + ('i' << 8) + ('l' << 4) + 'e')
-
-#ifndef	M_PI
-#define	M_PI			3.14159265358979323846264338
-#endif
-
-
-typedef struct
-{	int			magic ;
-	SNDFILE 	*sndfile ;
-	SF_INFO 	sfinfo ;
-
-	float		buffer	[BUFFER_LEN] ;
-} SNDFILE_CB_DATA ;
-
-typedef struct
-{	int			magic ;
-
-	SNDFILE_CB_DATA	sf ;
-
-	int			freq_point ;
-
-	SRC_STATE	*src_state ;
-
-} SRC_CB_DATA ;
-
-static int varispeed_get_data (SRC_CB_DATA *data, float *samples, int frames) ;
-static void varispeed_play (const char *filename, int converter) ;
-
-static long src_input_callback (void *cb_data, float **data) ;
-
-int
-main (int argc, char *argv [])
-{	const char	*cptr, *progname, *filename ;
-	int			k, converter ;
-
-	converter = SRC_SINC_FASTEST ;
-
-	progname = argv [0] ;
-
-	if ((cptr = strrchr (progname, '/')) != NULL)
-		progname = cptr + 1 ;
-
-	if ((cptr = strrchr (progname, '\\')) != NULL)
-		progname = cptr + 1 ;
-
-	printf ("\n"
-		"  %s\n"
-		"\n"
-		"  This is a demo program which plays the given file at a slowly \n"
-		"  varying speed. Lots of fun with drum loops and full mixes.\n"
-		"\n"
-		"  It uses Secret Rabbit Code (aka libsamplerate) to perform the \n"
-		"  vari-speeding and libsndfile for file I/O.\n"
-		"\n", progname) ;
-
-	if (argc == 2)
-		filename = argv [1] ;
-	else if (argc == 4 && strcmp (argv [1], "-c") == 0)
-	{	filename = argv [3] ;
-		converter = atoi (argv [2]) ;
-		}
-	else
-	{	printf ("  Usage :\n\n       %s [-c <number>] <input file>\n\n", 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\n", k, cptr) ;
-
-		puts ("") ;
-		exit (1) ;
-		} ;
-
-	varispeed_play (filename, converter) ;
-
-	return 0 ;
-} /* main */
-
-/*==============================================================================
-*/
-
-static void
-varispeed_play (const char *filename, int converter)
-{	SRC_CB_DATA		data ;
-	AUDIO_OUT		*audio_out ;
-	int				error ;
-
-	memset (&data, 0, sizeof (data)) ;
-
-	data.magic = SRC_MAGIC ;
-	data.sf.magic = SNDFILE_MAGIC ;
-
-	if ((data.sf.sndfile = sf_open (filename, SFM_READ, &data.sf.sfinfo)) == NULL)
-	{	puts (sf_strerror (NULL)) ;
-		exit (1) ;
-		} ;
-
-	/* Initialize the sample rate converter. */
-	if ((data.src_state = src_callback_new (src_input_callback, converter, data.sf.sfinfo.channels, &error, &data.sf)) == NULL)
-	{	printf ("\n\nError : src_new() failed : %s.\n\n", src_strerror (error)) ;
-		exit (1) ;
-		} ;
-
-	printf (
-
-		"  Playing   : %s\n"
-		"  Converter : %s\n"
-		"\n"
-		"  Press <control-c> to exit.\n"
-		"\n",
-		filename, src_get_name (converter)) ;
-
-	if ((audio_out = audio_open (data.sf.sfinfo.channels, data.sf.sfinfo.samplerate)) == NULL)
-	{	printf ("\n\nError : audio_open () failed.\n") ;
-		exit (1) ;
-		} ;
-
-	/* Pass the data and the callbacl function to audio_play */
-	audio_play ((get_audio_callback_t) varispeed_get_data, audio_out, &data) ;
-
-	/* Cleanup */
-	audio_close (audio_out) ;
-	sf_close (data.sf.sndfile) ;
-	src_delete (data.src_state) ;
-
-} /* varispeed_play */
-
-static long
-src_input_callback (void *cb_data, float **audio)
-{	SNDFILE_CB_DATA * data = (SNDFILE_CB_DATA *) cb_data ;
-	const int input_frames = ARRAY_LEN (data->buffer) / data->sfinfo.channels ;
-	int		read_frames ;
-
-	if (data->magic != SNDFILE_MAGIC)
-	{	printf ("\n\n%s:%d Eeeek, something really bad happened!\n", __FILE__, __LINE__) ;
-		exit (1) ;
-		} ;
-
-	for (read_frames = 0 ; read_frames < input_frames ; )
-	{	sf_count_t position ;
-
-		read_frames += (int) sf_readf_float (data->sndfile, data->buffer + read_frames * data->sfinfo.channels, input_frames - read_frames) ;
-
-		position = sf_seek (data->sndfile, 0, SEEK_CUR) ;
-
-		if (position < 0 || position == data->sfinfo.frames)
-			sf_seek (data->sndfile, 0, SEEK_SET) ;
-		} ;
-
-	*audio = & (data->buffer [0]) ;
-
-	return input_frames ;
-} /* src_input_callback */
-
-
-/*==============================================================================
-*/
-
-static int
-varispeed_get_data (SRC_CB_DATA *data, float *samples, int out_frames)
-{	float	*output ;
-	int		rc, out_frame_count ;
-
-	if (data->magic != SRC_MAGIC)
-	{	printf ("\n\n%s:%d Eeeek, something really bad happened!\n", __FILE__, __LINE__) ;
-		exit (1) ;
-		} ;
-
-	for (out_frame_count = 0 ; out_frame_count < out_frames ; out_frame_count += VARISPEED_BLOCK_LEN)
-	{	double	src_ratio = 1.0 - 0.5 * sin (data->freq_point * 2 * M_PI / 20000) ;
-
-		data->freq_point ++ ;
-
-		output = samples + out_frame_count * data->sf.sfinfo.channels ;
-
-		if ((rc = src_callback_read (data->src_state, src_ratio, VARISPEED_BLOCK_LEN, output)) < VARISPEED_BLOCK_LEN)
-		{	printf ("\nError : src_callback_read short output (%d instead of %d)\n\n", rc, VARISPEED_BLOCK_LEN) ;
-			exit (1) ;
-			} ;
-		} ;
-
-	return out_frames ;
-} /* varispeed_get_data */
-
-/*==============================================================================
-*/
-
-#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.zip.com.au/~erikd/libsndfile/).\n"
-		" It is therefore completely broken and non-functional.\n"
-		"****************************************************************\n"
-		"\n"
-		) ;
-
-	return 0 ;
-} /* main */
-
-#endif