text: /*
  ** 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/erikd/libsamplerate/blob/master/COPYING
  */
  
  #include "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) ;
  
  
  int
  main (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 void
  callback_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 void
  alarm_handler (int number)
  {
  	(void) number ;
  	printf ("\n\n    Error : Hang inside src_callback_read() detected. Exiting!\n\n") ;
  	exit (1) ;
  } /* alarm_handler */
  
  static long
  input_callback (void *cb_data, float **data)
  {
  	static float buffer [20] ;
  
  	(void) cb_data ;
  	*data = buffer ;
  
  	return ARRAY_LEN (buffer) ;
  } /* input_callback */
  
  #else
  
  int
  main (void)
  {
  	puts ("\tCan't run this test on this platform.") ;
  	return 0 ;
  } /* main */
  
  #endif
  