ref: 06a021bb7ab5a85975a6e27b7cc5255768df3666
dir: libsamplerate/tests/reset_test.c
/*
** 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 <stdio.h>
#include <stdlib.h>
#include <samplerate.h>
#include "util.h"
#define BUFFER_LEN 2048
#define CB_READ_LEN 256
static void process_reset_test (int converter) ;
static void callback_reset_test (int converter) ;
static float data_one [BUFFER_LEN] ;
static float data_zero [BUFFER_LEN] ;
int
main (void)
{
puts ("") ;
process_reset_test (SRC_ZERO_ORDER_HOLD) ;
process_reset_test (SRC_LINEAR) ;
process_reset_test (SRC_SINC_FASTEST) ;
callback_reset_test (SRC_ZERO_ORDER_HOLD) ;
callback_reset_test (SRC_LINEAR) ;
callback_reset_test (SRC_SINC_FASTEST) ;
puts ("") ;
return 0 ;
} /* main */
static void
process_reset_test (int converter)
{ static float output [BUFFER_LEN] ;
SRC_STATE *src_state ;
SRC_DATA src_data ;
int k, error ;
printf ("\tprocess_reset_test (%-28s) ....... ", src_get_name (converter)) ;
fflush (stdout) ;
for (k = 0 ; k < BUFFER_LEN ; k++)
{ data_one [k] = 1.0 ;
data_zero [k] = 0.0 ;
} ;
/* Get a converter. */
if ((src_state = src_new (converter, 1, &error)) == NULL)
{ printf ("\n\nLine %d : src_new() failed : %s.\n\n", __LINE__, src_strerror (error)) ;
exit (1) ;
} ;
/* Process a bunch of 1.0 valued samples. */
src_data.data_in = data_one ;
src_data.data_out = output ;
src_data.input_frames = BUFFER_LEN ;
src_data.output_frames = BUFFER_LEN ;
src_data.src_ratio = 0.9 ;
src_data.end_of_input = 1 ;
if ((error = src_process (src_state, &src_data)) != 0)
{ printf ("\n\nLine %d : src_simple () returned error : %s\n\n", __LINE__, src_strerror (error)) ;
exit (1) ;
} ;
/* Reset the state of the converter.*/
src_reset (src_state) ;
/* Now process some zero data. */
src_data.data_in = data_zero ;
src_data.data_out = output ;
src_data.input_frames = BUFFER_LEN ;
src_data.output_frames = BUFFER_LEN ;
src_data.src_ratio = 0.9 ;
src_data.end_of_input = 1 ;
if ((error = src_process (src_state, &src_data)) != 0)
{ printf ("\n\nLine %d : src_simple () returned error : %s\n\n", __LINE__, src_strerror (error)) ;
exit (1) ;
} ;
/* Finally make sure that the output data is zero ie reset was sucessful. */
for (k = 0 ; k < BUFFER_LEN / 2 ; k++)
if (output [k] != 0.0)
{ printf ("\n\nLine %d : output [%d] should be 0.0, is %f.\n", __LINE__, k, output [k]) ;
exit (1) ;
} ;
/* Make sure that this function has been exported. */
src_set_ratio (src_state, 1.0) ;
/* Delete converter. */
src_state = src_delete (src_state) ;
puts ("ok") ;
} /* process_reset_test */
/*==============================================================================
*/
typedef struct
{ int channels ;
long count, total ;
float *data ;
} 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 > 0)
frames = pcb_data->total - pcb_data->count ;
else
frames = 0 ;
*data = pcb_data->data + pcb_data->count ;
pcb_data->count += frames ;
return frames ;
} /* test_callback_func */
static void
callback_reset_test (int converter)
{ static TEST_CB_DATA test_callback_data ;
static float output [BUFFER_LEN] ;
SRC_STATE *src_state ;
double src_ratio = 1.1 ;
long read_count, read_total ;
int k, error ;
printf ("\tcallback_reset_test (%-28s) ....... ", src_get_name (converter)) ;
fflush (stdout) ;
for (k = 0 ; k < ARRAY_LEN (data_one) ; k++)
{ data_one [k] = 1.0 ;
data_zero [k] = 0.0 ;
} ;
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) ;
} ;
/* Process a bunch of 1.0 valued samples. */
test_callback_data.channels = 1 ;
test_callback_data.count = 0 ;
test_callback_data.total = ARRAY_LEN (data_one) ;
test_callback_data.data = data_one ;
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) ;
/* Check for errors. */
if ((error = src_error (src_state)) != 0)
{ printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
exit (1) ;
} ;
/* Reset the state of the converter.*/
src_reset (src_state) ;
/* Process a bunch of 0.0 valued samples. */
test_callback_data.channels = 1 ;
test_callback_data.count = 0 ;
test_callback_data.total = ARRAY_LEN (data_zero) ;
test_callback_data.data = data_zero ;
/* Now process some zero data. */
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) ;
/* Check for errors. */
if ((error = src_error (src_state)) != 0)
{ printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
exit (1) ;
} ;
/* Finally make sure that the output data is zero ie reset was sucessful. */
for (k = 0 ; k < BUFFER_LEN / 2 ; k++)
if (output [k] != 0.0)
{ printf ("\n\nLine %d : output [%d] should be 0.0, is %f.\n\n", __LINE__, k, output [k]) ;
save_oct_float ("output.dat", data_one, ARRAY_LEN (data_one), output, ARRAY_LEN (output)) ;
exit (1) ;
} ;
/* Make sure that this function has been exported. */
src_set_ratio (src_state, 1.0) ;
/* Delete converter. */
src_state = src_delete (src_state) ;
puts ("ok") ;
} /* callback_reset_test */