Chris@0: /*
Chris@0: ** Copyright (C) 2002-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
Chris@0: **
Chris@0: ** This program is free software; you can redistribute it and/or modify
Chris@0: ** it under the terms of the GNU General Public License as published by
Chris@0: ** the Free Software Foundation; either version 2 of the License, or
Chris@0: ** (at your option) any later version.
Chris@0: **
Chris@0: ** This program is distributed in the hope that it will be useful,
Chris@0: ** but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@0: ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@0: ** GNU General Public License for more details.
Chris@0: **
Chris@0: ** You should have received a copy of the GNU General Public License
Chris@0: ** along with this program; if not, write to the Free Software
Chris@0: ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
Chris@0: */
Chris@0: 
Chris@0: #include <stdio.h>
Chris@0: #include <stdlib.h>
Chris@0: #include <string.h>
Chris@0: #include <math.h>
Chris@0: 
Chris@0: #include <samplerate.h>
Chris@0: 
Chris@0: #include "util.h"
Chris@0: 
Chris@0: #define	BUFFER_LEN		2048
Chris@0: 
Chris@0: static void simple_test (int converter, double ratio) ;
Chris@0: 
Chris@0: int
Chris@0: main (void)
Chris@0: {	static double src_ratios [] =
Chris@0: 	{	1.0001, 0.099, 0.1, 0.33333333, 0.789, 1.9, 3.1, 9.9
Chris@0: 	} ;
Chris@0: 
Chris@0: 	int k ;
Chris@0: 
Chris@0: 	puts ("") ;
Chris@0: 
Chris@0: 	puts ("    Zero Order Hold interpolator :") ;
Chris@0: 	for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
Chris@0: 		simple_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ;
Chris@0: 
Chris@0: 	puts ("    Linear interpolator :") ;
Chris@0: 	for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
Chris@0: 		simple_test (SRC_LINEAR, src_ratios [k]) ;
Chris@0: 
Chris@0: 	puts ("    Sinc interpolator :") ;
Chris@0: 	for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
Chris@0: 		simple_test (SRC_SINC_FASTEST, src_ratios [k]) ;
Chris@0: 
Chris@0: 	puts ("") ;
Chris@0: 
Chris@0: 	return 0 ;
Chris@0: } /* main */
Chris@0: 
Chris@0: static void
Chris@0: simple_test (int converter, double src_ratio)
Chris@0: {	static float input [BUFFER_LEN], output [BUFFER_LEN] ;
Chris@0: 
Chris@0: 	SRC_DATA	src_data ;
Chris@0: 
Chris@0: 	int input_len, output_len, error, terminate ;
Chris@0: 
Chris@0: 	printf ("\tsimple_test      (SRC ratio = %6.4f) ........... ", src_ratio) ;
Chris@0: 	fflush (stdout) ;
Chris@0: 
Chris@0: 	/* Calculate maximun input and output lengths. */
Chris@0: 	if (src_ratio >= 1.0)
Chris@0: 	{	output_len = BUFFER_LEN ;
Chris@0: 		input_len = (int) floor (BUFFER_LEN / src_ratio) ;
Chris@0: 		}
Chris@0: 	else
Chris@0: 	{	input_len = BUFFER_LEN ;
Chris@0: 		output_len = (int) floor (BUFFER_LEN * src_ratio) ;
Chris@0: 		} ;
Chris@0: 
Chris@0: 	/* Reduce input_len by 10 so output is longer than necessary. */
Chris@0: 	input_len -= 10 ;
Chris@0: 
Chris@0: 	if (output_len > BUFFER_LEN)
Chris@0: 	{	printf ("\n\nLine %d : output_len > BUFFER_LEN\n\n", __LINE__) ;
Chris@0: 		exit (1) ;
Chris@0: 		} ;
Chris@0: 
Chris@0: 	memset (&src_data, 0, sizeof (src_data)) ;
Chris@0: 
Chris@0: 	src_data.data_in = input ;
Chris@0: 	src_data.input_frames = input_len ;
Chris@0: 
Chris@0: 	src_data.src_ratio = src_ratio ;
Chris@0: 
Chris@0: 	src_data.data_out = output ;
Chris@0: 	src_data.output_frames = BUFFER_LEN ;
Chris@0: 
Chris@0: 	if ((error = src_simple (&src_data, converter, 1)))
Chris@0: 	{	printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
Chris@0: 		exit (1) ;
Chris@0: 		} ;
Chris@0: 
Chris@0: 	terminate = (int) ceil ((src_ratio >= 1.0) ? src_ratio : 1.0 / src_ratio) ;
Chris@0: 
Chris@0: 	if (fabs (src_data.output_frames_gen - src_ratio * input_len) > 2 * terminate)
Chris@0: 	{	printf ("\n\nLine %d : bad output data length %ld should be %d.\n", __LINE__,
Chris@0: 					src_data.output_frames_gen, (int) floor (src_ratio * input_len)) ;
Chris@0: 		printf ("\tsrc_ratio  : %.4f\n", src_ratio) ;
Chris@0: 		printf ("\tinput_len  : %d\n\toutput_len : %d\n\n", input_len, output_len) ;
Chris@0: 		exit (1) ;
Chris@0: 		} ;
Chris@0: 
Chris@0: 	puts ("ok") ;
Chris@0: 
Chris@0: 	return ;
Chris@0: } /* simple_test */
Chris@0: