244 lines
6.4 KiB
C
244 lines
6.4 KiB
C
/*
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** Copyright (C) 2003-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <samplerate.h>
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#include "util.h"
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#define BUFFER_LEN 10000
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#define CB_READ_LEN 256
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static void callback_test (int converter, double ratio) ;
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static void end_of_stream_test (int converter) ;
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int
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main (void)
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{ static double src_ratios [] =
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{ 1.0, 0.099, 0.1, 0.33333333, 0.789, 1.0001, 1.9, 3.1, 9.9
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} ;
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int k ;
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puts ("") ;
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puts (" Zero Order Hold interpolator :") ;
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for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
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callback_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ;
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puts (" Linear interpolator :") ;
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for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
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callback_test (SRC_LINEAR, src_ratios [k]) ;
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puts (" Sinc interpolator :") ;
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for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
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callback_test (SRC_SINC_FASTEST, src_ratios [k]) ;
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puts ("") ;
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puts (" End of stream test :") ;
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end_of_stream_test (SRC_ZERO_ORDER_HOLD) ;
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end_of_stream_test (SRC_LINEAR) ;
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end_of_stream_test (SRC_SINC_FASTEST) ;
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puts ("") ;
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return 0 ;
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} /* main */
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/*=====================================================================================
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*/
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typedef struct
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{ int channels ;
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long count, total ;
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int end_of_data ;
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float data [BUFFER_LEN] ;
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} TEST_CB_DATA ;
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static long
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test_callback_func (void *cb_data, float **data)
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{ TEST_CB_DATA *pcb_data ;
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long frames ;
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if ((pcb_data = cb_data) == NULL)
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return 0 ;
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if (data == NULL)
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return 0 ;
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if (pcb_data->total - pcb_data->count > CB_READ_LEN)
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frames = CB_READ_LEN / pcb_data->channels ;
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else
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frames = (pcb_data->total - pcb_data->count) / pcb_data->channels ;
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*data = pcb_data->data + pcb_data->count ;
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pcb_data->count += frames ;
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return frames ;
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} /* test_callback_func */
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static void
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callback_test (int converter, double src_ratio)
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{ static TEST_CB_DATA test_callback_data ;
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static float output [BUFFER_LEN] ;
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SRC_STATE *src_state ;
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long read_count, read_total ;
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int error ;
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printf ("\tcallback_test (SRC ratio = %6.4f) ........... ", src_ratio) ;
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fflush (stdout) ;
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test_callback_data.channels = 2 ;
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test_callback_data.count = 0 ;
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test_callback_data.end_of_data = 0 ;
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test_callback_data.total = ARRAY_LEN (test_callback_data.data) ;
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if ((src_state = src_callback_new (test_callback_func, converter, test_callback_data.channels, &error, &test_callback_data)) == NULL)
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{ printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
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exit (1) ;
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} ;
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read_total = 0 ;
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do
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{ /* We will be throwing away output data, so just grab as much as possible. */
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read_count = ARRAY_LEN (output) / test_callback_data.channels ;
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read_count = src_callback_read (src_state, src_ratio, read_count, output) ;
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read_total += read_count ;
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}
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while (read_count > 0) ;
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if ((error = src_error (src_state)) != 0)
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{ printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
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exit (1) ;
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} ;
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src_state = src_delete (src_state) ;
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if (fabs (read_total / src_ratio - ARRAY_LEN (test_callback_data.data)) > 2.0)
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{ printf ("\n\nLine %d : input / output length mismatch.\n\n", __LINE__) ;
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printf (" input len : %d\n", ARRAY_LEN (test_callback_data.data)) ;
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printf (" output len : %ld (should be %g +/- 2)\n\n", read_total,
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floor (0.5 + src_ratio * ARRAY_LEN (test_callback_data.data))) ;
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exit (1) ;
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} ;
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puts ("ok") ;
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return ;
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} /* callback_test */
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/*=====================================================================================
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*/
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static long
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eos_callback_func (void *cb_data, float **data)
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{
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TEST_CB_DATA *pcb_data ;
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long frames ;
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if (data == NULL)
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return 0 ;
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if ((pcb_data = cb_data) == NULL)
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return 0 ;
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/*
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** Return immediately if there is no more data.
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** In this case, the output pointer 'data' will not be set and
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** valgrind should not warn about it.
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*/
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if (pcb_data->end_of_data)
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return 0 ;
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if (pcb_data->total - pcb_data->count > CB_READ_LEN)
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frames = CB_READ_LEN / pcb_data->channels ;
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else
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frames = (pcb_data->total - pcb_data->count) / pcb_data->channels ;
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*data = pcb_data->data + pcb_data->count ;
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pcb_data->count += frames ;
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/*
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** Set end_of_data so that the next call to the callback function will
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** return zero ocunt without setting the 'data' pointer.
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*/
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if (pcb_data->total < 2 * pcb_data->count)
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pcb_data->end_of_data = 1 ;
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return frames ;
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} /* eos_callback_data */
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static void
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end_of_stream_test (int converter)
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{ static TEST_CB_DATA test_callback_data ;
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static float output [BUFFER_LEN] ;
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SRC_STATE *src_state ;
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double src_ratio = 0.3 ;
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long read_count, read_total ;
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int error ;
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printf ("\t%-30s ........... ", src_get_name (converter)) ;
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fflush (stdout) ;
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test_callback_data.channels = 2 ;
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test_callback_data.count = 0 ;
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test_callback_data.end_of_data = 0 ;
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test_callback_data.total = ARRAY_LEN (test_callback_data.data) ;
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if ((src_state = src_callback_new (eos_callback_func, converter, test_callback_data.channels, &error, &test_callback_data)) == NULL)
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{ printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
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exit (1) ;
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} ;
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read_total = 0 ;
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do
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{ /* We will be throwing away output data, so just grab as much as possible. */
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read_count = ARRAY_LEN (output) / test_callback_data.channels ;
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read_count = src_callback_read (src_state, src_ratio, read_count, output) ;
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read_total += read_count ;
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}
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while (read_count > 0) ;
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if ((error = src_error (src_state)) != 0)
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{ printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
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exit (1) ;
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} ;
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src_state = src_delete (src_state) ;
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if (test_callback_data.end_of_data == 0)
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{ printf ("\n\nLine %d : test_callback_data.end_of_data should not be 0."
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" This is a bug in the test.\n\n", __LINE__) ;
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exit (1) ;
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} ;
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puts ("ok") ;
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return ;
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} /* end_of_stream_test */
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