/*** 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*/ #include <stdio.h>#include <stdlib.h> #include <samplerate.h> #include "util.h" #define	BUFFER_LEN		2048#define CB_READ_LEN		256 static void process_reset_test (int converter) ;static void callback_reset_test (int converter) ; static float data_one [BUFFER_LEN] ;static float data_zero [BUFFER_LEN] ; intmain (void){	puts ("") ; 	process_reset_test (SRC_ZERO_ORDER_HOLD) ;	process_reset_test (SRC_LINEAR) ;	process_reset_test (SRC_SINC_FASTEST) ; 	callback_reset_test (SRC_ZERO_ORDER_HOLD) ;	callback_reset_test (SRC_LINEAR) ;	callback_reset_test (SRC_SINC_FASTEST) ; 	puts ("") ; 	return 0 ;} /* main */ static voidprocess_reset_test (int converter){	static float output [BUFFER_LEN] ; 	SRC_STATE *src_state ;	SRC_DATA src_data ;	int k, error ; 	printf ("\tprocess_reset_test  (%-28s) ....... ", src_get_name (converter)) ;	fflush (stdout) ; 	for (k = 0 ; k < BUFFER_LEN ; k++)	{	data_one [k] = 1.0 ;		data_zero [k] = 0.0 ;		} ; 	/* Get a converter. */	if ((src_state = src_new (converter, 1, &error)) == NULL)	{	printf ("\n\nLine %d : src_new() failed : %s.\n\n", __LINE__, src_strerror (error)) ;		exit (1) ;		} ; 	/* Process a bunch of 1.0 valued samples. */	src_data.data_in		= data_one ;	src_data.data_out		= output ;	src_data.input_frames	= BUFFER_LEN ;	src_data.output_frames	= BUFFER_LEN ;	src_data.src_ratio		= 0.9 ;	src_data.end_of_input	= 1 ; 	if ((error = src_process (src_state, &src_data)) != 0)	{	printf ("\n\nLine %d : src_simple () returned error : %s\n\n", __LINE__, src_strerror (error)) ;		exit (1) ;		} ; 	/* Reset the state of the converter.*/	src_reset (src_state) ; 	/* Now process some zero data. */	src_data.data_in		= data_zero ;	src_data.data_out		= output ;	src_data.input_frames	= BUFFER_LEN ;	src_data.output_frames	= BUFFER_LEN ;	src_data.src_ratio		= 0.9 ;	src_data.end_of_input	= 1 ; 	if ((error = src_process (src_state, &src_data)) != 0)	{	printf ("\n\nLine %d : src_simple () returned error : %s\n\n", __LINE__, src_strerror (error)) ;		exit (1) ;		} ; 	/* Finally make sure that the output data is zero ie reset was sucessful. */	for (k = 0 ; k < BUFFER_LEN / 2 ; k++)		if (output [k] != 0.0)		{	printf ("\n\nLine %d : output [%d] should be 0.0, is %f.\n", __LINE__, k, output [k]) ;			exit (1) ;			} ; 	/* Make sure that this function has been exported. */	src_set_ratio (src_state, 1.0) ; 	/* Delete converter. */	src_state = src_delete (src_state) ; 	puts ("ok") ;} /* process_reset_test */ /*==============================================================================*/ typedef struct{	int channels ;	long count, total ;	float *data ;} TEST_CB_DATA ; static longtest_callback_func (void *cb_data, float **data){	TEST_CB_DATA *pcb_data ; 	long frames ; 	if ((pcb_data = cb_data) == NULL)		return 0 ; 	if (data == NULL)		return 0 ; 	if (pcb_data->total - pcb_data->count > 0)		frames = pcb_data->total - pcb_data->count ;	else		frames = 0 ; 	*data = pcb_data->data + pcb_data->count ;	pcb_data->count += frames ; 	return frames ;} /* test_callback_func */ static voidcallback_reset_test (int converter){	static TEST_CB_DATA test_callback_data ; 	static float output [BUFFER_LEN] ; 	SRC_STATE *src_state ; 	double src_ratio = 1.1 ;	long read_count, read_total ;	int k, error ; 	printf ("\tcallback_reset_test (%-28s) ....... ", src_get_name (converter)) ;	fflush (stdout) ; 	for (k = 0 ; k < ARRAY_LEN (data_one) ; k++)	{	data_one [k] = 1.0 ;		data_zero [k] = 0.0 ;		} ; 	if ((src_state = src_callback_new (test_callback_func, converter, 1, &error, &test_callback_data)) == NULL)	{	printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;		exit (1) ;		} ; 	/* Process a bunch of 1.0 valued samples. */	test_callback_data.channels = 1 ;	test_callback_data.count = 0 ;	test_callback_data.total = ARRAY_LEN (data_one) ;	test_callback_data.data = data_one ; 	read_total = 0 ;	do	{	read_count = (ARRAY_LEN (output) - read_total > CB_READ_LEN) ? CB_READ_LEN : ARRAY_LEN (output) - read_total ;		read_count = src_callback_read (src_state, src_ratio, read_count, output + read_total) ;		read_total += read_count ;		}	while (read_count > 0) ; 	/* Check for errors. */	if ((error = src_error (src_state)) != 0)	{	printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;		exit (1) ;		} ; 	/* Reset the state of the converter.*/	src_reset (src_state) ; 	/* Process a bunch of 0.0 valued samples. */	test_callback_data.channels = 1 ;	test_callback_data.count = 0 ;	test_callback_data.total = ARRAY_LEN (data_zero) ;	test_callback_data.data = data_zero ; 	/* Now process some zero data. */	read_total = 0 ;	do	{	read_count = (ARRAY_LEN (output) - read_total > CB_READ_LEN) ? CB_READ_LEN : ARRAY_LEN (output) - read_total ;		read_count = src_callback_read (src_state, src_ratio, read_count, output + read_total) ;		read_total += read_count ;		}	while (read_count > 0) ; 	/* Check for errors. */	if ((error = src_error (src_state)) != 0)	{	printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;		exit (1) ;		} ; 	/* Finally make sure that the output data is zero ie reset was sucessful. */	for (k = 0 ; k < BUFFER_LEN / 2 ; k++)		if (output [k] != 0.0)		{	printf ("\n\nLine %d : output [%d] should be 0.0, is %f.\n\n", __LINE__, k, output [k]) ;			save_oct_float ("output.dat", data_one, ARRAY_LEN (data_one), output, ARRAY_LEN (output)) ;			exit (1) ;			} ; 	/* Make sure that this function has been exported. */	src_set_ratio (src_state, 1.0) ; 	/* Delete converter. */	src_state = src_delete (src_state) ; 	puts ("ok") ;} /* callback_reset_test */