comparison src/libsamplerate-0.1.9/tests/simple_test.c @ 41:481f5f8c5634

Current libsamplerate source

+/*
+** Copyright (c) 2002-2016, Erik de Castro Lopo <[e-mail]>
+** 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#include <samplerate.h>
+
+#include "util.h"
+
+#define	BUFFER_LEN		2048
+
+static void simple_test (int converter, double ratio) ;
+
+int
+main (void)
+{	static double src_ratios [] =
+	{	1.0001, 0.099, 0.1, 0.33333333, 0.789, 1.9, 3.1, 9.9
+	} ;
+
+	int k ;
+
+	puts ("") ;
+
+	puts ("    Zero Order Hold interpolator :") ;
+	for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
+		simple_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ;
+
+	puts ("    Linear interpolator :") ;
+	for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
+		simple_test (SRC_LINEAR, src_ratios [k]) ;
+
+	puts ("    Sinc interpolator :") ;
+	for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
+		simple_test (SRC_SINC_FASTEST, src_ratios [k]) ;
+
+	puts ("") ;
+
+	return 0 ;
+} /* main */
+
+static void
+simple_test (int converter, double src_ratio)
+{	static float input [BUFFER_LEN], output [BUFFER_LEN] ;
+
+	SRC_DATA	src_data ;
+
+	int input_len, output_len, error, terminate ;
+
+	printf ("\tsimple_test      (SRC ratio = %6.4f) ........... ", src_ratio) ;
+	fflush (stdout) ;
+
+	/* Calculate maximun input and output lengths. */
+	if (src_ratio >= 1.0)
+	{	output_len = BUFFER_LEN ;
+		input_len = (int) floor (BUFFER_LEN / src_ratio) ;
+		}
+	else
+	{	input_len = BUFFER_LEN ;
+		output_len = (int) floor (BUFFER_LEN * src_ratio) ;
+		} ;
+
+	/* Reduce input_len by 10 so output is longer than necessary. */
+	input_len -= 10 ;
+
+	if (output_len > BUFFER_LEN)
+	{	printf ("\n\nLine %d : output_len > BUFFER_LEN\n\n", __LINE__) ;
+		exit (1) ;
+		} ;
+
+	memset (&src_data, 0, sizeof (src_data)) ;
+
+	src_data.data_in = input ;
+	src_data.input_frames = input_len ;
+
+	src_data.src_ratio = src_ratio ;
+
+	src_data.data_out = output ;
+	src_data.output_frames = BUFFER_LEN ;
+
+	if ((error = src_simple (&src_data, converter, 1)))
+	{	printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
+		exit (1) ;
+		} ;
+
+	terminate = (int) ceil ((src_ratio >= 1.0) ? src_ratio : 1.0 / src_ratio) ;
+
+	if (fabs (src_data.output_frames_gen - src_ratio * input_len) > 2 * terminate)
+	{	printf ("\n\nLine %d : bad output data length %ld should be %d.\n", __LINE__,
+					src_data.output_frames_gen, (int) floor (src_ratio * input_len)) ;
+		printf ("\tsrc_ratio  : %.4f\n", src_ratio) ;
+		printf ("\tinput_len  : %d\n\toutput_len : %d\n\n", input_len, output_len) ;
+		exit (1) ;
+		} ;
+
+	puts ("ok") ;
+
+	return ;
+} /* simple_test */
+