ref: 277998ed89b151c9654c600749021757b4e579c4
dir: /tests/varispeed_test.c/
/*
** Copyright (C) 2006 Erik de Castro Lopo <[email protected]>
**
** 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 <math.h>
#include <samplerate.h>
#include "util.h"
#define BUFFER_LEN ((1 << 16) - 20)
static void varispeed_test (int converter) ;
int
main (void)
{
puts (" Zero Order Hold interpolator: ") ;
varispeed_test (SRC_ZERO_ORDER_HOLD) ;
puts (" Linear interpolator: ") ;
varispeed_test (SRC_LINEAR) ;
puts (" Sinc interpolator: ") ;
varispeed_test (SRC_SINC_FASTEST) ;
return 0 ;
} /* main */
static void
varispeed_test (int converter)
{ static float input [BUFFER_LEN], output [BUFFER_LEN] ;
double src_ratio ;
SRC_STATE *src_state ;
SRC_DATA src_data ;
int input_len, output_len, current_in, current_out ;
int k, error, terminate ;
/* Erik */
for (k = 0 ; k < BUFFER_LEN ; k++) input [k] = k * 1.0 ;
/* 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 -= 20 ;
if (output_len > BUFFER_LEN)
{ printf ("\n\nLine %d : output_len > BUFFER_LEN\n\n", __LINE__) ;
exit (1) ;
} ;
current_in = current_out = 0 ;
/* Perform sample rate conversion. */
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) ;
} ;
src_data.end_of_input = 0 ; /* Set this later. */
src_data.data_in = input ;
src_data.src_ratio = src_ratio ;
src_data.data_out = output ;
src_data.output_frames = ARRAY_LEN (output) / 10 ;
terminate = 1 + (int) ceil ((src_ratio >= 1.0) ? src_ratio : 1.0 / src_ratio) ;
while (1)
{
src_data.input_frames = next_block_length (0) ;
src_data.input_frames = MIN (src_data.input_frames, input_len - current_in) ;
src_data.output_frames = ARRAY_LEN (output) - current_out ;
/*-Erik MIN (src_data.output_frames, output_len - current_out) ;-*/
src_data.end_of_input = (current_in >= input_len) ? 1 : 0 ;
if ((error = src_process (src_state, &src_data)))
{ printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
printf (" src_data.input_frames : %ld\n", src_data.input_frames) ;
printf (" src_data.output_frames : %ld\n\n", src_data.output_frames) ;
exit (1) ;
} ;
if (src_data.end_of_input && src_data.output_frames_gen == 0)
break ;
if (src_data.input_frames_used > src_data.input_frames)
{ printf ("\n\nLine %d : input_frames_used > input_frames\n\n", __LINE__) ;
printf (" src_data.input_frames : %ld\n", src_data.input_frames) ;
printf (" src_data.input_frames_used : %ld\n", src_data.input_frames_used) ;
printf (" src_data.output_frames : %ld\n", src_data.output_frames) ;
printf (" src_data.output_frames_gen : %ld\n\n", src_data.output_frames_gen) ;
exit (1) ;
} ;
if (src_data.input_frames_used < 0)
{ printf ("\n\nLine %d : input_frames_used (%ld) < 0\n\n", __LINE__, src_data.input_frames_used) ;
exit (1) ;
} ;
if (src_data.output_frames_gen < 0)
{ printf ("\n\nLine %d : output_frames_gen (%ld) < 0\n\n", __LINE__, src_data.output_frames_gen) ;
exit (1) ;
} ;
current_in += src_data.input_frames_used ;
current_out += src_data.output_frames_gen ;
if (current_in > input_len + terminate)
{ printf ("\n\nLine %d : current_in (%d) > input_len (%d + %d)\n\n", __LINE__, current_in, input_len, terminate) ;
exit (1) ;
} ;
if (current_out > output_len)
{ printf ("\n\nLine %d : current_out (%d) > output_len (%d)\n\n", __LINE__, current_out, output_len) ;
exit (1) ;
} ;
if (src_data.input_frames_used > input_len)
{ printf ("\n\nLine %d : input_frames_used (%ld) > %d\n\n", __LINE__, src_data.input_frames_used, input_len) ;
exit (1) ;
} ;
if (src_data.output_frames_gen > output_len)
{ printf ("\n\nLine %d : output_frames_gen (%ld) > %d\n\n", __LINE__, src_data.output_frames_gen, output_len) ;
exit (1) ;
} ;
if (src_data.data_in == NULL && src_data.output_frames_gen == 0)
break ;
src_data.data_in += src_data.input_frames_used ;
src_data.data_out += src_data.output_frames_gen ;
} ;
src_state = src_delete (src_state) ;
if (fabs (current_out - src_ratio * input_len) > terminate)
{ printf ("\n\nLine %d : bad output data length %d should be %2.1f +/- %d.\n", __LINE__,
current_out, src_ratio * input_len, terminate) ;
printf ("\tsrc_ratio : %.4f\n", src_ratio) ;
printf ("\tinput_len : %d\n\tinput_used : %d\n", input_len, current_in) ;
printf ("\toutput_len : %d\n\toutput_gen : %d\n\n", output_len, current_out) ;
exit (1) ;
} ;
if (current_in != input_len)
{ printf ("\n\nLine %d : unused input.\n", __LINE__) ;
printf ("\tinput_len : %d\n", input_len) ;
printf ("\tinput_frames_used : %d\n\n", current_in) ;
exit (1) ;
} ;
puts ("ok") ;
return ;
} /* varispeed_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: 0c9492de-9c59-4690-ba38-f384b547dc74
*/