libsamplerate/tests/callback_hang_test.c

   1 /*
   2 ** Copyright (c) 2002-2016, Erik de Castro Lopo <erikd@mega-nerd.com>
   3 ** All rights reserved.
   4 **
   5 ** This code is released under 2-clause BSD license. Please see the
   6 ** file at : https://github.com/erikd/libsamplerate/blob/master/COPYING
   7 */
   8
   9 #include "config.h"
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <math.h>
  15
  16 #if HAVE_ALARM && HAVE_SIGNAL && HAVE_SIGALRM
  17
  18 #include <signal.h>
  19
  20 #include <samplerate.h>
  21
  22 #include "util.h"
  23
  24 #define SHORT_BUFFER_LEN        512
  25 #define LONG_BUFFER_LEN         (1 << 14)
  26
  27 typedef struct
  28 {       double ratio ;
  29         int count ;
  30 } SRC_PAIR ;
  31
  32 static void callback_hang_test (int converter) ;
  33
  34 static void alarm_handler (int number) ;
  35 static long input_callback (void *cb_data, float **data) ;
  36
  37
  38 int
  39 main (void)
  40 {
  41         /* Set up SIGALRM handler. */
  42         signal (SIGALRM, alarm_handler) ;
  43
  44         puts ("") ;
  45         callback_hang_test (SRC_ZERO_ORDER_HOLD) ;
  46         callback_hang_test (SRC_LINEAR) ;
  47         callback_hang_test (SRC_SINC_FASTEST) ;
  48         puts ("") ;
  49
  50         return 0 ;
  51 } /* main */
  52
  53
  54 static void
  55 callback_hang_test (int converter)
  56 {       static float output [LONG_BUFFER_LEN] ;
  57         static SRC_PAIR pairs [] =
  58         {
  59                 { 1.2, 5 }, { 1.1, 1 }, { 1.0, 1 }, { 3.0, 1 }, { 2.0, 1 }, { 0.3, 1 },
  60                 { 1.2, 0 }, { 1.1, 10 }, { 1.0, 1 }
  61                 } ;
  62
  63
  64         SRC_STATE       *src_state ;
  65
  66         double src_ratio = 1.0 ;
  67         int k, error ;
  68
  69         printf ("\tcallback_hang_test  (%-28s) ....... ", src_get_name (converter)) ;
  70         fflush (stdout) ;
  71
  72         /* Perform sample rate conversion. */
  73         src_state = src_callback_new (input_callback, converter, 1, &error, NULL) ;
  74         if (src_state == NULL)
  75         {       printf ("\n\nLine %d : src_callback_new () failed : %s\n\n", __LINE__, src_strerror (error)) ;
  76                 exit (1) ;
  77                 } ;
  78
  79         for (k = 0 ; k < ARRAY_LEN (pairs) ; k++)
  80         {       alarm (1) ;
  81                 src_ratio = pairs [k].ratio ;
  82                 src_callback_read (src_state, src_ratio, pairs [k].count, output) ;
  83                 } ;
  84
  85         src_state = src_delete (src_state) ;
  86
  87         alarm (0) ;
  88         puts ("ok") ;
  89
  90         return ;
  91 } /* callback_hang_test */
  92
  93 static void
  94 alarm_handler (int number)
  95 {
  96         (void) number ;
  97         printf ("\n\n    Error : Hang inside src_callback_read() detected. Exiting!\n\n") ;
  98         exit (1) ;
  99 } /* alarm_handler */
 100
 101 static long
 102 input_callback (void *cb_data, float **data)
 103 {
 104         static float buffer [20] ;
 105
 106         (void) cb_data ;
 107         *data = buffer ;
 108
 109         return ARRAY_LEN (buffer) ;
 110 } /* input_callback */
 111
 112 #else
 113
 114 int
 115 main (void)
 116 {
 117         puts ("\tCan't run this test on this platform.") ;
 118         return 0 ;
 119 } /* main */
 120
 121 #endif