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/*
** Copyright (C) 2003 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <samplerate.h>
#include "util.h"
#define BUFFER_LEN 90000
#define CB_READ_LEN 256
static void callback_test (int converter, double ratio) ;
int
main (void)
{ static double src_ratios [] =
{ 1.0, 0.099, 0.1, 0.33333333, 0.789, 1.0001, 1.9, 3.1, 9.9
} ;
int k ;
/* Force output of the Electric Fence banner message. */
force_efence_banner () ;
puts ("") ;
puts (" Zero Order Hold interpolator :") ;
for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
callback_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ;
puts (" Linear interpolator :") ;
for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
callback_test (SRC_LINEAR, src_ratios [k]) ;
puts (" Sinc interpolator :") ;
for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
callback_test (SRC_SINC_FASTEST, src_ratios [k]) ;
puts ("") ;
return 0 ;
} /* main */
/*=====================================================================================
*/
typedef struct
{ int channels ;
long count, total ;
float data [BUFFER_LEN] ;
} TEST_CB_DATA ;
static long
test_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 > CB_READ_LEN)
frames = CB_READ_LEN ;
else
frames = pcb_data->total - pcb_data->count ;
*data = pcb_data->data + pcb_data->count ;
pcb_data->count += frames ;
return frames ;
} /* test_callback_func */
static void
callback_test (int converter, double src_ratio)
{ static TEST_CB_DATA test_callback_data ;
static float output [BUFFER_LEN] ;
SRC_STATE *src_state ;
long read_count, read_total ;
int input_len, output_len, error ;
printf ("\tcallback_test (SRC ratio = %6.4f) ........... ", src_ratio) ;
fflush (stdout) ;
/* Calculate maximun input and output lengths. */
if (src_ratio >= 1.0)
{ output_len = BUFFER_LEN ;
input_len = (int) floor (BUFFER_LEN / src_ratio) ;
}
else
{ input_len = BUFFER_LEN ;
output_len = (int) floor (BUFFER_LEN * src_ratio) ;
} ;
/* Reduce input_len by 10 so output is longer than necessary. */
input_len -= 10 ;
if (output_len > BUFFER_LEN)
{ printf ("\n\nLine %d : output_len > BUFFER_LEN\n\n", __LINE__) ;
exit (1) ;
} ;
test_callback_data.channels = 1 ;
test_callback_data.count = 0 ;
test_callback_data.total = input_len ;
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) ;
} ;
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) ;
if ((error = src_error (src_state)) != 0)
{ printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
exit (1) ;
} ;
src_state = src_delete (src_state) ;
if (fabs (read_total - src_ratio * input_len) > 2)
{ printf ("\n\nLine %d : input / output length mismatch.\n\n", __LINE__) ;
printf (" input len : %d\n", input_len) ;
printf (" output len : %ld (should be %g +/- 2)\n\n", read_total, floor (0.5 + src_ratio * input_len)) ;
exit (1) ;
} ;
puts ("ok") ;
return ;
} /* callback_test */
/*
** Do not edit or modify anything in this comment block.
** The arch-tag line is a file identity tag for the GNU Arch
** revision control system.
**
** arch-tag: bf1edd96-b137-48bc-a3ab-194007fadb55
*/
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