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callback_hang_test.c

/*
** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/

#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 ;
      long out_count ;
      int current_out ;
      int k, error ;

      printf ("\tcallback_hang_test  (%-28s) ....... ", src_get_name (converter)) ;
      fflush (stdout) ;

      current_out = 0 ;

      /* 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 ;
            out_count = 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)
{
      number = 0 ;
      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] ;

      cb_data = NULL ;
      *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

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