comparison src/libsamplerate-0.1.9/tests/reset_test.c @ 126:4a7071416412

Current libsamplerate source

+/*
+** Copyright (c) 2002-2016, Erik de Castro Lopo <[e-mail]>
+** 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 <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 */
+
+