/*** 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 "src_config.h" #include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <math.h> #if HAVE_ALARM && HAVE_SIGNAL && HAVE_SIGALRM #include <signal.h> #include <samplerate.h> #include "util.h" #define	SHORT_BUFFER_LEN	512#define	LONG_BUFFER_LEN		(1 << 14) typedef struct{	double ratio ;	int count ;} SRC_PAIR ; static void callback_hang_test (int converter) ; static void alarm_handler (int number) ;static long input_callback (void *cb_data, float **data) ;  intmain (void){	/* Set up SIGALRM handler. */	signal (SIGALRM, alarm_handler) ; 	puts ("") ;	callback_hang_test (SRC_ZERO_ORDER_HOLD) ;	callback_hang_test (SRC_LINEAR) ;	callback_hang_test (SRC_SINC_FASTEST) ;	puts ("") ; 	return 0 ;} /* main */  static voidcallback_hang_test (int converter){	static float output [LONG_BUFFER_LEN] ;	static SRC_PAIR pairs [] =	{		{ 1.2, 5 }, { 1.1, 1 }, { 1.0, 1 }, { 3.0, 1 }, { 2.0, 1 }, { 0.3, 1 },		{ 1.2, 0 }, { 1.1, 10 }, { 1.0, 1 }		} ;  	SRC_STATE	*src_state ; 	double src_ratio = 1.0 ;	int k, error ; 	printf ("\tcallback_hang_test  (%-28s) ....... ", src_get_name (converter)) ;	fflush (stdout) ; 	/* Perform sample rate conversion. */	src_state = src_callback_new (input_callback, converter, 1, &error, NULL) ;	if (src_state == NULL)	{	printf ("\n\nLine %d : src_callback_new () failed : %s\n\n", __LINE__, src_strerror (error)) ;		exit (1) ;		} ; 	for (k = 0 ; k < ARRAY_LEN (pairs) ; k++)	{	alarm (1) ;		src_ratio = pairs [k].ratio ;		src_callback_read (src_state, src_ratio, pairs [k].count, output) ;		} ; 	src_state = src_delete (src_state) ; 	alarm (0) ;	puts ("ok") ; 	return ;} /* callback_hang_test */ static voidalarm_handler (int number){	(void) number ;	printf ("\n\n    Error : Hang inside src_callback_read() detected. Exiting!\n\n") ;	exit (1) ;} /* alarm_handler */ static longinput_callback (void *cb_data, float **data){	static float buffer [20] ; 	(void) cb_data ;	*data = buffer ; 	return ARRAY_LEN (buffer) ;} /* input_callback */ #else intmain (void){	puts ("\tCan't run this test on this platform.") ;	return 0 ;} /* main */ #endif